Temporal Processing (e.g., Pulse Width Variation Over Time Patents (Class 345/691)
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Publication number: 20140368559Abstract: A liquid crystal display device includes: a first image signal generating unit for acquiring an image signal and for generating a first image signal in which at least a part of the pixel drive values are reduced; a second image signal generating unit for acquiring the image signal and for generating a second image signal in which at least a part of the pixel drive values are increased; a display signal selection unit for selecting one of the first image signal and the second image signal as a display signal; and a polarity control unit for controlling a polarity of the display signal. The polarity control unit inverts the polarity of the display signal. The display signal selection unit selects the first image signal in a frame immediately before the inversion and selects the second image signal in a frame immediately after the inversion.Type: ApplicationFiled: February 20, 2014Publication date: December 18, 2014Applicant: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Sachiko YAMAZAKI, Yoshihisa OOISHI
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Patent number: 8913092Abstract: A compensation table generating system includes a test signal applying part which applies a test signal corresponding to reference gray scales to a display panel, an image obtaining part which obtains a test image of each of the reference gray scales displayed on the display panel based on the test signal, a position information extractor which measures a brightness distribution of each of the reference gray scales of the display panel based on the test image of each of the reference gray scales and extracts a representative position information of an stain area, in which a stain appears, based on the brightness distribution of each of the reference gray scales, a compensation data calculator which calculates a compensation data corresponding to a position of the stain area, and a brightness compensation table which stores the representative position information and the compensation data.Type: GrantFiled: February 8, 2012Date of Patent: December 16, 2014Assignee: Samsung Display Co., Ltd.Inventors: Youngsuk Ha, Jee-Hoon Jeon, Min-Kyu Park
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Publication number: 20140354712Abstract: A display device that adopts a field sequential method and that is capable of achieving desired luminance while suppressing mixing of colors is provided. With respect to display of each color by a liquid crystal display device adopting a field sequential method, a period is provided for which light sources of each color remain turned on until a turning-off delay time has elapsed since an end timing of a subframe period. The turning-off delay time relating to LEDs for which an off state begins in a preceding subframe period is configured in such a way as to be shorter than a turning-on delay time relating to LEDs for which an on state begins in a succeeding subframe period. As a result, an all-off period, in which LEDs of all colors are in the off state, is provided between on periods of two colors.Type: ApplicationFiled: February 12, 2013Publication date: December 4, 2014Applicant: SHARP KABUSHIKI KAISHAInventor: Yasunori Ake
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Publication number: 20140354710Abstract: A display unit including pixels which display an image according to an image data signal transferred corresponding to each of the pixels, and a controller to receive and convert an external input video signal to transfer a luminance conversion data signal corresponding to the respective pixels. The controller includes: an input image data to receive the external input video signal; a scale factor calculation unit to determine at least one control factor for luminance conversion with respect to an input video signal corresponding to the pixels received from the input image data receiving unit; and a luminance data conversion unit to convert luminance data with respect to the respective pixels using the at least one determined control factor and to output the luminance conversion data signal.Type: ApplicationFiled: September 13, 2013Publication date: December 4, 2014Applicant: Samsung Display Co., Ltd.Inventors: Bong-Ju JUN, Weon-Jun CHOE
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Publication number: 20140354711Abstract: An organic light emitting display device includes pixels, a scan driver, a memory configured to store pixel data containing information indicative of threshold voltages and mobilities of first transistors in the pixels, a timing controller configured to modify one or more bits of first data to generate second data, the first data modified in response to the pixel data, a data driver configured to generate data signals based on the second data, and a control driver configured to supply a first control signal to a first control line commonly coupled to the pixels and a second control signal to a second control line, wherein each of the pixels is configured to store a data signal of a current frame and to emit light corresponding to a data signal of a previous frame.Type: ApplicationFiled: March 14, 2014Publication date: December 4, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Hai-Jung IN, Jung-Bae KIM, Bo-Yong CHUNG
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Patent number: 8902264Abstract: A display apparatus includes a display panel including n×m array of pixels and which sequentially drives the pixels from pixels in a first row to pixels in an n-th row, a panel driving circuit which sequentially applies first, second, third or fourth image data to the display panel, a backlight unit including a first light source disposed adjacent to the pixels in the first row and a second light source disposed adjacent to the pixels in the n-th row, and a backlight control circuit which divides each of first and second time periods into first, second, third and fourth blinking time periods, and applies a control signal to the backlight unit, where the first time period corresponds to two frames during which the first and second image data are applied, and the second time period corresponds to two frames during which the third and fourth image data are applied.Type: GrantFiled: June 27, 2011Date of Patent: December 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Won Sik Oh, Jin-Taek Hong
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Patent number: 8902263Abstract: A display device includes: a display unit including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines and emitting light according to corresponding image data; a dummy pixel connected to a dummy scan line and a dummy data line; and a compensation image data generator calculating a compensation amount according to an accumulation light emitting time of the first organic light emitting element to detect the compensation amount corresponding to each accumulation light emitting time of a plurality of second organic light emitting elements of the plurality of pixels by using a decreasing amount of luminance corresponding a resistance of a first organic light emitting element according to an accumulation light emitting time of the first organic light emitting element of the dummy pixel, and compensating the corresponding image data according to the detected compensation amount.Type: GrantFiled: June 3, 2011Date of Patent: December 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Jae-Woo Ryu, Do-Ik Kim
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Patent number: 8896638Abstract: An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y?Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.Type: GrantFiled: April 15, 2011Date of Patent: November 25, 2014Assignee: Hitachi Maxell, Ltd.Inventors: Hiroyuki Kurabayashi, Yasutaka Tsuru, Yuya Ogi, Kazuhiko Tanaka, Akihiro Shiraishi
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Publication number: 20140340436Abstract: An electro-optical device selects a detection target pixel independently and obtains correction data to perform a correction operation. Under a control of the electro-optical device, remaining pixels other than the detection target pixel emit light to display an image.Type: ApplicationFiled: May 15, 2014Publication date: November 20, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Masayuki KUMETA, Takeshi OKUNO, Eiji KANDA
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Patent number: 8890909Abstract: Disclosed is a power control device, which generates PWM signals corresponding to obtained voltage signals, and which performs PWM control of power to be supplied to a load. The power control device is provided with a sampling section that performs sampling of the voltage signals, and a duty factor updating section, which updates the duty factor of the PWM signals on the basis of the sampling results. The sampling section is prevented from performing sampling during a masking period which is set as the on-period or the off-period of the PWM signals.Type: GrantFiled: December 1, 2010Date of Patent: November 18, 2014Assignee: Sharp Kabushiki KaishaInventor: Shouichi Fukutoku
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Patent number: 8890860Abstract: The present invention relates to an EL display device in which a stereoscopic image is perceived and eyeglasses having a switching means with which an image for a left eye or an image for a right eye is selectively perceived. The image for the left eye and the image for the right eye are displayed in a display portion of the EL display device by holding an image signal from a signal line in a first capacitor in a first period, holding the image signal held in the first capacitor in a second capacitor to control current that flows through an emission-control transistor in a second period, and turning on a driving transistor to control light emission of a light-emitting element and holding an image signal from a signal line in the first capacitor in a third period.Type: GrantFiled: August 30, 2011Date of Patent: November 18, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Jun Koyama
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Publication number: 20140333685Abstract: An electro-optic display has a plurality of pixels, each of which is capable of displaying two extreme optical states and at least one intermediate gray level. Each pixel is driven from an initial intermediate gray level to one extreme optical state and thence to a first desired intermediate gray level, so producing a first image on the display. The pixel then remains at this first desired intermediate gray level for a finite length of time. The pixel is then driven from this first desired intermediate gray level to the opposed extreme optical state and thence to a second desired intermediate gray level, so producing a second image on the display.Type: ApplicationFiled: July 29, 2014Publication date: November 13, 2014Inventors: Teck Ping Sim, Kenneth R. Crounse
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Publication number: 20140320556Abstract: During a frame period of a stereoscopic image, a corresponding left-eye image and a corresponding right-eye image are provided. The frame period is divided into four sub-frame periods. The left-eye image includes two left-eye sub-images. The right-eye image includes two right-eye sub-images. During a specific sub-frame period, a corresponding sub-image is displayed on a first region of a display panel and an image having a constant grayscale is displayed on a second region of the display panel.Type: ApplicationFiled: April 25, 2014Publication date: October 30, 2014Applicant: WINTEK CORPORATIONInventors: Chong-Yang Fang, Lo-Hsien Tsai, Chun-Ho Chen
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Publication number: 20140320555Abstract: A pixel circuit for an active matrix organic light-emitting diode display system includes a first input node, a second input node, first power supply node, a second power supply node, a triode switch circuit, a storage capacitor, an organic light emitting diode, and a resistive element. The triode switch circuit is connected to the first and second input nodes. The storage capacitor is connected between an output of the triode switch circuit and the second power supply node. The organic light-emitting diode is connected between the output of the triode switch circuit and the second power supply node. The first resistive element is connected between the output of the triode switch circuit and the first power supply node.Type: ApplicationFiled: August 19, 2013Publication date: October 30, 2014Applicant: Internatiional Business Machines CorporationInventors: Bahman Hekmatshoartabari, Davood Shahrjerdi
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Publication number: 20140313425Abstract: A display system, having an emissive body, varying light emitted from the surface so that different temporally adjacent time periods see the emissive body outputting different primary colors. A liquid crystal display can then modulate the different primary colors that have been output at different times. In one embodiment, the different times modulate red green and blue colors. In another embodiment, the different times modulate red green blue and white colors. The emissive body can be a FIPEL type device. Light can be both color varied and also color temperature controlled. The light color is changed by changing a frequency used to drive the body.Type: ApplicationFiled: April 19, 2013Publication date: October 23, 2014Applicant: Vizio IncInventor: Matthew McRae
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Publication number: 20140313241Abstract: Pixel circuits of a display device each include: a drive transistor including one of a source and drain connected to a power source line; a capacitive element including a first terminal connected to a gate of the drive transistor; a switching element which switches conduction/non-conduction between a second terminal of the capacitive element and a data line; a switching element which switches conduction/non-conduction between the second terminal of the capacitive element and the source of the drive transistor; a switching element which switches conduction/non-conduction between the first terminal of the capacitive element and a reference voltage line; a light-emitting element including a first terminal connected to the other of the source and drain of the drive transistor and a second terminal connected to another power source line. The reference voltage line provides a forward bias voltage larger than a threshold voltage across the gate and source of the drive transistor.Type: ApplicationFiled: November 24, 2011Publication date: October 23, 2014Applicant: PANASONIC CORPORATIONInventors: Shinya Ono, Arinobu Kanegae, Hitoshi Tsuge, Kouhei Ebisuno
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Publication number: 20140307010Abstract: An organic light emitting diode display includes a plurality of pixels configured to store a first data signal received through a corresponding data line during a scan period and to emit light according to a second data signal during a light emitting period of a frame, wherein the first data signal corresponds to the frame and the second data signal corresponds to a previous frame, and the scan period overlaps the light emitting period.Type: ApplicationFiled: August 20, 2013Publication date: October 16, 2014Applicant: Samsung Display Co., LTD.Inventor: Sang-Myeon Han
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Publication number: 20140307011Abstract: Techniques are provided to provide various pulse width modulation (PWM) schemes to embodiments of dual modulator display systems that may comprise a backlight of individually addressable and controllable light emitters. The backlight provides illumination to a light modulator for further conditioning of the light to be presented to a viewer. The backlight may be striped and each stripe is assigned a PWM scheme that effectively increases the bit depth of the controller for each stripe. The display system may allow a better matching of PWM periods to LCD frame rates to reduce visual artifacts. In another embodiment, the display system may detect a small bright feature to be rendered in the image data and, with a pre-assignment of light emitters to different partitions, the backlight controller may drive a subset of the light emitters according to the partitions.Type: ApplicationFiled: November 7, 2012Publication date: October 16, 2014Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Ajit Ninan, Qifan Huang, Greg Maturi, Neil Mammen, James Kronrod
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Publication number: 20140307012Abstract: A pixel circuit 10 is provided with TFTs 12 and 13 and an organic EL element 15 on a current path connecting a power supply line VPk and an electrode having a common potential Vcom. A display device 100 simultaneously performs initialization to pixel circuits 10 in a plurality of rows, simultaneously perform threshold detection to the pixel circuits 10 in the plurality of rows, sequentially writes data to the pixel circuits 10 row by row, and makes the organic EL elements 15 included in the pixel circuits 10 in the plurality of rows emit light in the same period. In a period from completion of threshold detection to start of light emission, the TFTs 11 and 13 are controlled to an off state, and a potential VP_C which is substantially equal to the common potential Vcom is applied to the power supply line VPk. Consequently, leak current flowing through the TFTs 12 and 13 can be suppressed, and the fluctuation in the node potential in the pixel circuit 10 in a standby period can be prevented.Type: ApplicationFiled: November 9, 2012Publication date: October 16, 2014Inventor: Noritaka Kishi
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Patent number: 8860770Abstract: A method of driving a display panel includes driving a first sub area and a second sub area of a pixel part in a two-dimensional (2D) image mode, wherein a first luminance difference exists between the first and second sub areas in the 2D image mode, and driving the first sub area and the second sub area of the pixel part in a three-dimensional (3D) image mode, wherein a second luminance difference exists between the first and second sub areas in the 3D image mode, the second luminance difference being smaller than the first luminance difference.Type: GrantFiled: September 23, 2011Date of Patent: October 14, 2014Assignee: Samsung Display Co., Ltd.Inventors: Yong-Ju Jeong, Jong-Hee Na, Young-Min Choi, Jae-Kil Lee, Seung-Kuk Yun, Ji-Eun Jang
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Patent number: 8860655Abstract: The present invention provides an edge-lit backlight module containing 2n+1 sequentially and equally separated backlight partitions where the 2n+1 backlight partitions are lit or turned off individually under a time-sequence control; a LCD panel scanned by the edge-lit backlight module is correspondingly separated into 2n+1 display partitions; the signal to the LCD panel is loaded into the LCD panel frame by frame and display partition by display partition under a time-sequence control; the time sequences to the signal to the LCD panel and the signal to the backlight partitions are controlled so that, whenever the signal loaded into the 2n+1 display partitions of the LCD panel constitutes a complete frame, the n+1 backlight partition in the middle of the edge-lit backlight module is always lit. The present invention also provides a scanning method of an edge-lit backlight module.Type: GrantFiled: July 12, 2012Date of Patent: October 14, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventor: Kuangyao Chang
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Publication number: 20140300655Abstract: A projection-type display device, which projects and displays images in accordance with an image signal includes a light source for projecting the images, output means that is equipped with a coil and switch, that uses electromagnetic induction of the coil to supply a current, and that changes the magnitude of the current by means of the switch, a cooling fan that cools the projection-type display device and for which the rotational speed is variable; and control means that, upon receiving an instruction to set a first mode in which a first current is intermittently supplied to the light source, both controls the switch to set the output current of the output means to the first current and intermittently supply the first current to the light source and sets the rotational speed of the cooling fan to a first rotational speed; and upon receiving an instruction to set a second mode in which a second current that is smaller than the first current is continuously supplied the light source, both controls the switchType: ApplicationFiled: January 13, 2012Publication date: October 9, 2014Inventor: Hiroshi Kato
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Publication number: 20140300654Abstract: The present invention aims to provide a driving control circuit of a display device, which includes a plurality of data driving circuits each having a timing controller merged with a source driver. The data driving circuits are configured to synchronize data of the respective data driving circuits and compensate for a difference between a data enable signal and a gate output enable signal, when an abnormal display signal is received.Type: ApplicationFiled: February 25, 2014Publication date: October 9, 2014Applicant: SILICON WORKS CO., LTDInventors: Young-Gi KIM, Hye-Lan Kim, Na-Ra Hong, Joon-Ho Na
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Patent number: 8854401Abstract: Present techniques involve methods and systems for reducing edge discoloration in a display. In one embodiment, the first and last columns of a display are dimmed by adjusting a black mask or reducing transmittance of the relevant pixels. Further, the first and last columns of a display may be entirely covered by the black mask. In some embodiments, using a coupling extrusion on a neighboring sub-pixel can be used to control the coupling between the neighboring sub-pixels to reduce edge discoloration. Display software may also be used to reduce edge discoloration. For example, software may automatically reduce the brightness of the first and last column. In some embodiments, software may be used to detect edges of objects within the display area. Edges of an object are detected, and the last sub-pixel of the background and/or the first sub-pixel of the object are compensated.Type: GrantFiled: December 28, 2010Date of Patent: October 7, 2014Assignee: Apple Inc.Inventors: Cheng Chen, Shih Chang Chang, Mingxia Gu, John Z. Zhong
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Publication number: 20140292838Abstract: An organic light emitting display and a driving method thereof are provided. The organic light emitting display includes a display region including a plurality of data lines, a plurality of scan lines, and a plurality of pixels connected to corresponding data lines and corresponding scan lines, a signal controller that converts input data into grayscale data according to gamma control data in a normal mode, changes the gamma control data according to dimming data in a dimming mode to generate gamma correction data, and converts the grayscale data into correction data according to the gamma correction data, a scan driver that supplies a plurality of scan signals to the plurality of scan lines, and a data driver that generates a plurality of data signals corresponding to the grayscale data or the correction data, and supplies the plurality of data signals to the plurality of data lines.Type: ApplicationFiled: March 28, 2014Publication date: October 2, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventor: Young-Uk WON
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Patent number: 8847961Abstract: Ink rendering techniques are described. In an implementation, an input is recognized by one or more modules that are executable on one or more processors of a computing device as an ink stroke to be rendered by a display device of the computing device. The ink stroke is built by the one or more modules using a strip of triangles and the strip of triangles is sent to a graphics processing unit to render the ink stroke.Type: GrantFiled: June 14, 2010Date of Patent: September 30, 2014Assignee: Microsoft CorporationInventor: Scott R. Marison
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Patent number: 8848007Abstract: Embodiments of the invention relate to an organic light emitting diode (OLED) display and a method for driving the same. The OLED display includes a data driving circuit configured to output a data voltage to the display panel; a scan driving circuit configured to sequentially output a scan pulse synchronized with the data voltage to a display panel; and a timing controller configured to decide whether or not the multicolor data are inputted, to control the scan driving circuit and the data driving circuit in a normal mode when the multicolor data are inputted, and to control the scan driving circuit and the data driving circuit in a current saving mode when the multicolor data are not inputted.Type: GrantFiled: September 16, 2011Date of Patent: September 30, 2014Assignee: LG Display Co., Ltd.Inventor: Hwanjoo Lee
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Publication number: 20140285541Abstract: A light irradiation device to display an image by light irradiation prevents easy perception of distortion occurring in the displayed image due to vibration of the device or movement of viewpoint. A random number is generated, and the refresh rate of the displayed image is distributed at random in correspondence with the random number. The light emission intensity is changed in correspondence with the refresh rate. When the number of lines is changed, the input video signal is subjected to scaling and a display is produced. The refresh rate is changed in correspondence with the frequency of the vibration detected with the vibration monitor.Type: ApplicationFiled: February 20, 2014Publication date: September 25, 2014Applicant: Hitachi Media Electronics Co., Ltd.Inventors: Yoshiho SEO, Satoshi OUCHI, Hiromi KUSAKA
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Publication number: 20140285540Abstract: The present invention provides a driving method for an LCD and an LCD control circuit using the method thereof. The method includes three steps. Step 1 is that providing an LCD comprising an LCD panel and an LCD control circuit, including a display control unit, a timing controller and a microcontroller interface module, and an electrically erasable programmable read only memory (EEPROM) is integrated into the timing controller. Step 2 is to operate a backlight scan, the timing controller reads EEPROM parameter from the installed EEPROM to generate reference timing for keeping operation of the display control unit under control, and the display control unit generates VSYNC signals. Step 3 is that the control circuit drives the panel to display images. The timing controller in the method integrating the EEPROM simplifies circuit design and raises product integration to reduce producing costs.Type: ApplicationFiled: February 6, 2013Publication date: September 25, 2014Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Dongguang Wu
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Patent number: 8842141Abstract: A method of uniform distribution for increasing a display rate. For data to be displayed, dividing a complete effective output enable (OE) time that is greater than one serial shift cycle into several unit serial shift cycles and uniformly distributing the effective OE time for display. The method implements the uniform distribution of the display time to the maximum extent by using an OE signal under the condition that the whole display time remains unchanged, thereby increasing effective output number of the uniform distribution, uniformly maintaining a display effect and steadily improving a refresh rate effect, so as to effectively increase a display quality and avoid a significant loss of brightness.Type: GrantFiled: September 19, 2011Date of Patent: September 23, 2014Assignee: Shenzhen Zhongqing Photoelectric Display Technology Co., LtdInventor: Song Shang
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Publication number: 20140267469Abstract: A display driving circuit in accordance with the inventive concepts may include a source amplifier. The source amplifier may include an output transistor configured to amplify an input signal to generate an output signal, and charge a source line of a display panel using the output signal. The source amplifier may include an output transistor switch configured to control the output transistor, and a switch control block configured to receive configuration bits including on/off time information of the output transistor switch to generate a switch control signal. The on/off time information includes information for turning on the output transistor switch in synchronization with a horizontal synchronous signal associated with the display panel, and information for turning off the output transistor switch at a time when the source line of the display panel is charged to a desired charge level.Type: ApplicationFiled: January 10, 2014Publication date: September 18, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seong-Young RYU, Hyunsang PARK, Sungpil CHOI
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Publication number: 20140267468Abstract: A pixel of a display panel includes a first transistor with a first end coupled to a data line, a control end coupled to a scan line; a second transistor with a first end coupled to a first voltage source, a control end coupled to a second end of the first transistor; a third transistor with a first end coupled to a second end of the second transistor, a control end for receiving a control signal; a light emitting unit with a first end coupled to the second end of the second transistor, a second end coupled to a second voltage source; a first capacitor with a first end coupled to the second end of the first transistor, a second end coupled to a second end of the third transistor; and a second capacitor coupled between the second end of the first capacitor and the second voltage source.Type: ApplicationFiled: June 27, 2013Publication date: September 18, 2014Inventors: Chun-Chieh Lin, Ya-Ling Chen
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Publication number: 20140267467Abstract: A display apparatus and a driving method for the display panel thereof are provided. The timing controller of the display apparatus determines whether the frame-displaying signal is a specific frame for displaying a first gray-level value and a second gray-level value. When the frame-displaying signal is corresponding to a specific frame for displaying the first gray-level value and the second gray-level value, the timing controller adjusts a plurality of enabling durations of multiple scan signals to control the pixels displaying the same luminance; when the frame-displaying signal is not corresponding to the specific frame for displaying the first gray-level value and the second gray-level value, the timing controller adjusts the enabling time of the scan signals to be identical to each other.Type: ApplicationFiled: May 17, 2013Publication date: September 18, 2014Inventors: Yi-Jui Huang, Chiao-Lin Huang
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Publication number: 20140267466Abstract: An apparatus, computing device, and a computer readable medium are described herein. The apparatus includes logic to process pixels using content adaptive LCD backlight control. The apparatus also includes logic to perform analog current level control dimming when processing the pixels, and logic to linearly compensate for the analog current level control dimming when processing the pixels.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventor: Akihiro Takagi
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Patent number: 8836364Abstract: A voltage test device used in liquid crystal display (LCD) panels, including test solder pads and test lines, is proposed. The test solder pads are connected to an LCD panel through the test lines. Each of the test lines includes a switch test line and a signal-inputting test line. The voltage test device further includes a first connector. The switch test line includes a first portion of the switch test line and a second portion of the switch test line. The first portion of the switch test line is connected to the second portion of the switch test line through the first connector. The first connector is used for preventing the electric current in excess of a predetermined threshold from flowing inside the LCD panel. Meanwhile, a voltage testing system used in LCD panels is proposed.Type: GrantFiled: August 12, 2011Date of Patent: September 16, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventor: Jin-jie Wang
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Patent number: 8836634Abstract: A stereoscopic image display and a method for driving the same are disclosed. The stereoscopic image display includes a display panel that displays a 2D image data in a 2D mode and displays a 3D image data in a 3D mode, a backlight unit providing light to the display panel, a timing controller that supplies a left eye image data during a data addressing period of a (2N?1)th frame period and supplies a right eye image data during a data addressing period of a 2Nth frame period in the 3D mode, where N is a natural number, and a backlight controller generating a backlight control signal for controlling light sources of the backlight unit so that the light sources of the backlight unit are turned on during a vertical blanking interval of each of the (2N?1)th frame period and the 2Nth frame period in the 3D mode.Type: GrantFiled: December 28, 2010Date of Patent: September 16, 2014Assignee: LG Display Co., Ltd.Inventor: Jaeyong Lee
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Publication number: 20140253612Abstract: A display device includes: a plurality of pixels, each of the pixels including: a switching transistor; a relay transistor; a first capacitor; a driving transistor; and an organic light emitting diode (OLED). The OLED emits light according to a driving current from a first power source voltage, and a light emitting period for the OLED is one of a first light emitting period that is not temporally overlapped with a scan period in which data are written to the pixels or a second light emitting period that is temporally overlapped with the scan period. A duty of the light emitting period is controlled by controlling a time when a second power source voltage is applied as a low level voltage within the first light emitting period or controlling a time when the second power source voltage is applied as a low level voltage within the second light emitting period.Type: ApplicationFiled: August 7, 2013Publication date: September 11, 2014Applicant: Samsung Display Co., Ltd.Inventors: Young-In Hwang, Seong-Il Park
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Publication number: 20140253611Abstract: Disclosed are methods and apparatus for rending colors in displays, such as adjustable interferometric modulation displays that can produce many colors with different sub-sets of primary colors. Received colors to be rendered are analyzed to determine when the colors to be rendered are within a predefined neutral region of a color space. Temporal primary colors may be generated to be used for rendering the received colors in a color space that are generated by temporal modulation using at least two temporal subframes to mix first and second primary colors of a display, such as white and black primaries. The temporal primary colors are used when rendering colors that lie within the predefined neutral region of the color space. When white and black primaries are used for temporal modulation, the produced grayscale temporal primaries are more robust than using two complementary colors, affording more robust neutral and near neutral colors.Type: ApplicationFiled: March 10, 2013Publication date: September 11, 2014Applicant: QUALCOMM MEMS Technologies. Inc.Inventors: Huanzhao ZENG, Jian J. MA, Tallis Y. CHANG
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Publication number: 20140247295Abstract: Disclosed embodiments relate to techniques for operating a backlight unit of a display device in a redundant mode and a non-redundant mode in the event of an open circuit condition or short string condition. For instance, in a redundant mode, multiple LED strings are driven to provide a first quantity of light, such that the combined output from all LED strings is capable of providing a total light output corresponding to a maximum brightness setting for the display device. In the case that one of the LED strings fails due to an open circuit condition or short string condition, the remaining LED strings may be driven to provide a second quantity of light that is greater than the first, such that the combined light output from the remaining LED strings provides the same total light output for achieving the maximum brightness setting.Type: ApplicationFiled: May 13, 2014Publication date: September 4, 2014Applicant: APPLE INC.Inventors: Asif Hussain, Manisha P. Pandya
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Patent number: 8823629Abstract: A method of driving a display device includes analyzing input data of the display device to confirm whether there is a predetermined image pattern in an image corresponding to the input data, where a common voltage is distorted to an extent that a clock signal for a gate driver of the display device is distorted when the display device displays the image including the predetermined image pattern, and changing a slew rate of an output buffer of a data driver of the display device based on a result of the analyzing the input data.Type: GrantFiled: March 22, 2012Date of Patent: September 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Hyeon Seok Bae, Gyu Ik Kim, Choong Seob Oh, Hoon Jung, Seung Hoon Han
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Patent number: 8823484Abstract: System and methods for automated adjustment of device settings are described. An electronic device comprises a receiver for receiving environmental information related to a surroundings of the device, a setting configurator for determining a desired setting for the device as a function of the environmental information, and a setting adjuster for adjusting a device setting in accordance with the desired setting. Moreover, the device further comprises a sensor for receiving the stimulus from the surroundings, for determining the value of the stimulus, and for sending the value of the stimulus to the receiver. Further, the device setting includes a volume of a speaker or a headphone, a theme or a color of a background displayed by the display, a brightness of the display, a sharpness of the display, a user interface displayed on the display, an intensity of a backlight of the display, or a contrast of the display.Type: GrantFiled: June 23, 2011Date of Patent: September 2, 2014Assignee: Sony CorporationInventors: Sean Patrick Kennedy, Andrew Lee Lawton
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Publication number: 20140240380Abstract: A driving device includes a memory configured to store an initial setting value to drive a display, a power source controller configured to output a pulse width modulation (PWM) signal controlling power applied to the display, and a switching unit configured to connect an input and output port to the memory when writing data to a memory and configured to connect the power source controller to the input and output port when driving the display.Type: ApplicationFiled: October 23, 2013Publication date: August 28, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jung-Sun LEE, Young-Joo LEE
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Publication number: 20140240379Abstract: An organic light emitting diode (OLED) display includes: a display unit comprising a plurality of data lines, a plurality of scan lines, and a plurality of pixels coupled to corresponding data lines of the data lines and corresponding scan lines of the scan lines; a scan driver configured to supply a plurality of scan signals to the scan lines; a data driver configured to: output a plurality of first data signals among a plurality of data signals through a plurality of first output lines among a plurality of output lines, output a plurality of second data signals among the data signals through the first output lines, and output a plurality of third data signals among the data signals through a plurality of second output lines among the output lines, wherein the first data signals represent a first color, the second data signals represent a second color, and the third data signals represent a third color; and a data distribution unit configured to: transmit the first data signals to a plurality of correspondinType: ApplicationFiled: June 25, 2013Publication date: August 28, 2014Applicant: Samsung Display Co., Ltd.Inventors: Seon-I Jeong, Ki-Myeong Eom
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Patent number: 8816950Abstract: In a timing controller and a display apparatus, the timing controller generates an internal enable signal based on an external enable signal and processes image data using the internal enable signal. The timing controller determines a width of each of the plurality of pulses of the external enable signal and subtracts a predetermined reference value from the count value to generate a control signal faster than an effective period of the external enable signal. The control signal is applied to a driver which drives a display panel on which an image is displayed. In an exemplary embodiment, the control signal serves as a vertical start signal which starts an operation of a gate driver applying a gate signal to the display panel, thus preventing or effectively eliminating a delay of the image data applied to the display panel.Type: GrantFiled: February 3, 2009Date of Patent: August 26, 2014Assignee: Samsung Display Co., Ltd.Inventors: Young-Su Han, Po-Yun Park
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Patent number: 8816953Abstract: A liquid crystal display (LCD) device and method of the driving the same is disclosed. According to an embodiment of the present invention, an LCD device includes a liquid crystal display panel; a plurality of backlight sources configured to provide light to the liquid crystal display panel; a scanning backlight controller configured to generate a pulse width modulation (PWM) signal for controlling a turn-on time and a turn-off time of the light sources and a current control signal for controlling a driving current of the backlight light sources; and a plurality of light source drivers configured to turn on and off the backlight sources in response to the PWM signal and control the driving current of the backlight sources in response to the current control signal.Type: GrantFiled: December 2, 2009Date of Patent: August 26, 2014Assignee: LG Display Co., Ltd.Inventors: Jonghoon Kim, Bogun Seo, Byungsam Min, Hyunwoo Jeon, Jonggu Heo
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Publication number: 20140232765Abstract: A liquid crystal display device which includes one image signal line which is connected to a plurality of pixels, a scanning line drive part which outputs an ON voltage to the respective pixels in a predetermined order, and a data line drive part which outputs image signal voltages. The data line drive part outputs a gray level signal voltage corresponding to a gray level value of the pixel as an image signal voltage in a first period, and outputs a correction gray level signal voltage different from the gray level signal voltage as an image signal voltage in a second period which precedes the first period. The liquid crystal display device further includes a control part which generates the correction gray level signal voltage based on the gray level value of the pixel and one or plurality of gray level values of pixels which precede the pixel in order.Type: ApplicationFiled: April 28, 2014Publication date: August 21, 2014Applicants: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yoshihisa OOISHI, Masato ISHII, Junichi MARUYAMA, Goki TOSHIMA
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Patent number: 8810613Abstract: Disclosed herein is a driving method for an image display apparatus which includes an image display panel and a signal processing section. Each of the pixels includes a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, and a third subpixel output signal. The driving method includes the step, further carried out by the signal processing section, of calculating a fourth subpixel output signal based on a fourth subpixel control second signal and a fourth subpixel control first signal, and outputting the calculated fourth subpixel output signal to the fourth subpixel of the (p,q)th pixel.Type: GrantFiled: January 14, 2011Date of Patent: August 19, 2014Assignee: Japan Display West Inc.Inventors: Amane Higashi, Akira Sakaigawa, Masaaki Kabe, Yasuo Takahashi
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Patent number: 8810615Abstract: A display device includes: a timing controller (10) for driving a scanning line driving circuit (4) and a signal line driving circuit (6) by providing a scanning period (T1) and a pause period (T2) which follows the scanning period (T1); a data analyzing section (101) for obtaining detection data on an external light intensity; and a BL luminance setting section (104) for outputting, at least during the pause period (T2), a BL control signal for adjusting, in accordance with the detection data obtained by the data analyzing section (101), a luminance of light to be emitted to a screen.Type: GrantFiled: April 3, 2012Date of Patent: August 19, 2014Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Kohji Saitoh, Asahi Yamato, Taketoshi Nakano, Toshihiro Yanagi, Akizumi Fujioka, Jun Nakata
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Patent number: 8810614Abstract: A 3D displaying device includes a first panel, a second panel and a backlight unit. The first panel includes a first liquid crystal layer for providing a left-eye image and a right-eye image. The second panel includes a first driving electrode substrate, a second driving electrode substrate and a second liquid crystal layer disposed between the first driving electrode substrate and the second driving electrode substrate, whereby light passing therethrough to generate polarization of a first angle or a second angle, wherein the second panel includes at least three sub-panel units. The backlight unit is disposed below the first panel and includes at least three light-emitting areas respectively corresponding to the at least three sub-panel units for providing a light source to the first panel and the second panel.Type: GrantFiled: April 18, 2012Date of Patent: August 19, 2014Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hung-Chun Li, Yi-Chiang Lai, Bo-Wei Lan
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Patent number: 8803833Abstract: A touch panel includes a display module, a touch sensor and a signal processing unit. The display module includes a timing control circuit and a data driving circuit, wherein the timing control circuit outputs latch signals to the data driving circuit, and the display module generates surface noises. The touch sensor is disposed above the display module and outputs abnormal signals, wherein the abnormal signals include a sensing signal and the surface noises. The signal processing unit is electrically connected to the touch sensor and receives the abnormal signals, wherein the signal processing unit calculates a predetermined time by utilizing a rising edge or a falling edge of the latch signal, suspensively processes the sensing signal during the predetermined time, and then continuously processes the sensing signals beyond the predetermined times so as to keep away from each period of the surface noises.Type: GrantFiled: June 22, 2012Date of Patent: August 12, 2014Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chien-Lin Yeh, Chun-Cheng Hou