Thin Film Tansistor (tft) Patents (Class 345/92)
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Patent number: 8982026Abstract: A sub-pixel circuit, display panel and driving method of the display panel are provided. The display panel has a plurality of data lines, scan lines and sub-pixel circuits. At least one of the sub-pixel circuits is electrically coupled to one data line and three scan lines. The sub-pixel circuit determines whether to receive data from the coupled data line or not according to scan signals transmitted on the coupled three scan lines, and controls transmittance itself accordingly. Specifically, the scan signals transmitted on the coupled three scan lines are different from each other.Type: GrantFiled: June 21, 2012Date of Patent: March 17, 2015Assignee: AU Optronics Corp.Inventors: Yu-Ching Wu, Tien-Lun Ting, Kun-Cheng Tien, Chien-Huang Liao, Wen-Hao Hsu
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Patent number: 8982113Abstract: The present invention discloses an LCD panel, which includes a gate driver, a source driver, a plurality of gate lines and data lines. The gate lines and the data lines define a plurality of pixel units, and each pixel unit includes a TFT, a common electrode, and a pixel electrode. The data line is utilized to charge the pixel electrode. The LCD panel further includes a common electrode line, the common electrode line coupled to the common electrode. The common electrode line is utilized to provide alternating common electrode voltages to the common electrode, so that a voltage of the pixel electrode still approaches a target voltage by which the data line charges the pixel electrode when a gate voltage of the TFT is turned off. The present invention also provides a method for controlling voltages of the LCD panel.Type: GrantFiled: September 15, 2011Date of Patent: March 17, 2015Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Chih-Tsung Kang
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Publication number: 20150070258Abstract: A scan line to which a selection signal or a non-selection signal is input from its end, and a transistor in which a clock signal is input to a gate, the non-selection signal is input to a source, and a drain is connected to the scan line are provided. A signal input to the end of the scan line is switched from the selection signal to the non-selection signal at the same or substantially the same time as the transistor is turned on. The non-selection signal is input not only from one end but also from both ends of the scan line. This makes it possible to inhibit the potentials of portions in the scan line from being changed at different times.Type: ApplicationFiled: September 2, 2014Publication date: March 12, 2015Inventor: Hiroyuki MIYAKE
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Publication number: 20150070305Abstract: A touch sensing display device includes: a thin film transistor array panel including a thin film transistor; and an opposing display panel facing the thin film transistor array panel. The opposing display panel includes a piezoelectric sensor including a capacitive sensor and a piezoelectric layer. The capacitive sensor includes sensing wires, driving wires, and a bridge connecting the sensing wires together or the driving wires together. The piezoelectric sensor further includes a pair of electrodes, the piezoelectric layer being disposed between the pair of electrodes. The bridge and a first electrode of the pair of electrodes are formed of the same material and in the same layer.Type: ApplicationFiled: August 15, 2014Publication date: March 12, 2015Inventors: Seung Mi SEO, Jong Seo LEE
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Patent number: 8970464Abstract: The present disclosure is directed to systems and methods for determining sheet resistance values in a liquid crystal display (LCD) panel. In certain embodiments, a system for determining sheet resistance values in an LCD panel may include a display driver integrated circuit (IC). The display driver IC may include a first switch coupled to a first input/output (I/O) pad and a second I/O pad such that the first I/O pad is configured to couple to a voltage source and the second I/O pad is configured to couple to a current source. The display driver IC may also include a second switch coupled to a third I/O pad and the second I/O pad such that the second switch has substantially the same geometry as the first switch and the third I/O pad is configured to couple to a thin-film transistor (TFT) layer of the display panel.Type: GrantFiled: August 31, 2012Date of Patent: March 3, 2015Assignee: Appl Inc.Inventors: Kingsuk Brahma, Saman Saeedi, Sang Y. Youn, Shafiq M Jamal, Taif A. Syed
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Patent number: 8963816Abstract: There are provided a light emitting display comprising at least a light emitting unit comprising at least two light emitting diodes which are electrically connected to the same driving unit to emit light, and a plurality of voltage sources whereby one voltage source supplies a voltage different from the other voltage(s) supplied from the other voltage source(s) to each of the light emitting diodes.Type: GrantFiled: December 14, 2006Date of Patent: February 24, 2015Assignee: LG Display Co., Ltd.Inventors: Seong Ho Baik, In Hwan Kim, Seung Chan Byun
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Patent number: 8963895Abstract: A ubiquitously mountable image display system includes a shape-reconfigurable display screen component to which is attached a plurality of circuit modules each having at least one light source. The shape-reconfigurable display screen component is formed of a material that accommodates flexing of the display screen component without creating a perceivable aberration in separation distance between two or more picture elements of an image that is rendered upon a viewing plane of the display screen component when light from the plurality of light sources is directed towards the viewing plane.Type: GrantFiled: September 22, 2011Date of Patent: February 24, 2015Assignee: Nano Lumens Acquisition Inc.Inventors: Richard Cope, Aris Silzars
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Publication number: 20150049071Abstract: Provided are: a liquid crystal display device capable of rapidly discharging an image signal which is held in a pixel formation portion, when a power supply thereof is turned off; and a driving method of the liquid crystal display device. If the liquid crystal display device shifts to an off-sequence mode, then a data signal Vd with a potential Vdoff1 corresponding to a shift amount ?V3 lowered by a coupling effect of a parasitic capacitance formed between a gate terminal and drain terminal of a thin film transistor (12) is applied to a signal line SL. When a scanning signal Vg turns to a high level, the data signal Vd applied to the signal line SL is written into the pixel formation portion (11), and a potential of a pixel signal Vpix becomes the Vdoff1. When the scanning signal Vg falls to a ground potential GND after an elapse of a period t1, the potential of the pixel signal Vpix is lowered by a shift amount ?V3, and accordingly, the potential of the pixel signal Vpix becomes the ground potential GND.Type: ApplicationFiled: April 5, 2013Publication date: February 19, 2015Inventor: Seiji Kaneko
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Patent number: 8957844Abstract: A display device comprises: a first substrate; LED light sources mounted on the first substrate; a backlight unit comprising a side surface on which light emitted from the LED light sources is incident and a back surface from which light is emitted in a direction different from the direction of the light incident on the side surface; and a panel disposed on the backlight unit and displaying a video image, wherein at least the first and second LED light sources adjacent to each other, among the LED light sources on the first substrate, are controlled differently from the other LED light sources on the first substrate based on the video image.Type: GrantFiled: February 2, 2011Date of Patent: February 17, 2015Assignee: LG Electronics Inc.Inventor: Jaedoo Sim
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Publication number: 20150042689Abstract: A gate driving circuit and a display apparatus having the gate driving circuit, in which the gate driving circuit includes a voltage adjusting part using a low clock signal to increase the reliability of the gate driving circuit, thereby extending the lifetime of the gate driving circuit.Type: ApplicationFiled: April 1, 2014Publication date: February 12, 2015Applicant: Samsung Display Co., Ltd.Inventors: Jong-Hee KIM, Yeong-Keun Kwon, Ji-Sun Kim, Jae-Keun Lim, ChongChel Chai
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Patent number: 8952878Abstract: A display device includes gate lines, data lines, first wires and second wires extending in the directions of the gate lines and data lines, and pixels having a first subpixel and a second subpixel each. The first subpixel has a first subpixel electrode and a first switching element, and the second subpixel has a second subpixel electrode and second and third switching elements. The control terminals of the three switching elements are connected to the same gate line, and the input terminals of the first and second switching elements are connected to the same data line. The first and second switching elements have output terminals connected to the first and second subpixel electrodes, respectively. The second switching element's output terminal connects to the third switching element, which has an output terminal connected to a second wire. The first wires and the second wires are connected in a pixel.Type: GrantFiled: June 14, 2012Date of Patent: February 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Jae Hwa Park, Yeo Geon Yoon, Jang-Il Kim, Kyung Ho Kim, Jong-In Kim, Min-Wook Park, Bum Ki Baek, Joon-Chul Goh, Young-Soo Yoon, Hak Bum Choi, Hyo-Seop Kim
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Patent number: 8952877Abstract: A display device and a driving method therefor includes a plurality of unit pixels arranged in a matrix form, a plurality of gate lines extending in a row direction and connected to the unit pixels, respectively, pluralities of first and second data lines extending in a column direction and connected to the unit pixels, respectively, a plurality of charge control lines extending in the row direction and connected to the unit pixels, respectively, a plurality of gate connection lines connected to at least two adjacent gate lines, respectively, and a plurality of charge connection lines connected to at least two adjacent charge control lines, respectively.Type: GrantFiled: June 24, 2008Date of Patent: February 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Dong Gyu Kim, Seong Young Lee, Sahng Ik Jun, Sung Jae Moon
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Patent number: 8952876Abstract: A display substrate includes a base substrate, a first insulating layer formed on a base substrate, a pixel including a pixel electrode having the first insulating layer, and a circuit including a circuit transistor disposed on a peripheral area to drive the pixel. The pixel includes a first channel formed on the base substrate having the first insulating layer formed thereon. The first channel includes a poly-silicon layer, a first source electrode and a first drain electrode formed on the first channel that are spaced apart from each other, and a first gate electrode formed on the first source electrode and the first drain electrode corresponding to the first channel which is formed of the transparent conductive material. The poly-silicon layer is formed at a front channel portion of the first channel proximal to the first gate electrode through the first gate electrode.Type: GrantFiled: October 8, 2010Date of Patent: February 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Hyung-Jun Kim, Sung-Haeng Cho, Yong-Mo Choi
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Publication number: 20150035872Abstract: A device according to an embodiment includes an array substrate including electrodes corresponding to pixels arranged in a matrix, a color filter substrate opposed to the array substrate and including color filters corresponding to the pixels, a liquid crystal layer provided between the substrates, a backlight, and a controller which controls the substrates and the backlight. The pixels are configured to each have a parallelogrammatic shape elongated in a lateral direction, such that identical colors are arranged in the lateral direction, and different colors are arranged in a vertical direction. Pixels neighboring in the lateral direction are in line-symmetry with respect to a center line of the neighboring pixels. Liquid crystal molecules have negative dielectric constant anisotropy, and rotate horizontally relative to a substrate plane in a direction of the line-symmetry with respect to the center line when the voltage is applied to the electrodes of the neighboring pixels.Type: ApplicationFiled: October 17, 2014Publication date: February 5, 2015Applicant: TOPPAN PRINTING CO., LTD.Inventors: Yasuhiro SHIMA, Hisashi NAKADA, Kenzo FUKUYOSHI
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Publication number: 20150035805Abstract: A liquid crystal display having photo-sensing input mechanism includes a first gate line for transmitting a first gate signal, a second gate line for transmitting a second gate signal, a data line for transmitting a data signal, a pixel unit for outputting an image signal according to the first gate signal and the data signal, a readout line for transmitting a readout signal, a photo-sensing input unit and a driving adjustment unit. The photo-sensing input unit is utilized for generating a sensing voltage according to a driving voltage and an incident light signal, and is further utilized for outputting the readout signal according to the sensing voltage and the first gate signal. The driving adjustment unit is employed to provide the driving voltage according to the second gate signal and the incident light signal.Type: ApplicationFiled: October 20, 2014Publication date: February 5, 2015Inventors: Pei-Yi Chen, Hsueh-Ying Huang, Jian-Shen Yu
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Patent number: 8947406Abstract: A display method suitable for an image provided by a digital data file and/or a display method of a display device in which the image quality and power consumption are adjusted in accordance with the state of the display device or at user's request to display an image. The image is displayed on the display device in which a plurality of pixels having a pixel electrode connected to a switching element whose off-state current is reduced, using the image provided by the digital data file and data which is provided by the digital data file and is correlated to an operation of the display device.Type: GrantFiled: January 18, 2011Date of Patent: February 3, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kenichi Wakimoto, Masahiko Hayakawa
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Patent number: 8947418Abstract: A display device in which low power consumption is realized without lowering an aperture ratio is provided. A liquid crystal capacitive element Clc is sandwiched between a pixel electrode 20 and an opposite electrode 80. The pixel electrode 20, one end of a first switch circuit 22, one end of a second switch circuit 23 and a first terminal of a second transistor T2 form an internal node N1. The other terminals of the first switch circuit 22 and the second switch circuit 23 are connected to a source line SL. The second switch circuit 23 is a series circuit composed of a first transistor T1 and a diode D1. A control terminal of the first transistor T1, a second terminal of the second transistor T2 and one end of a boost capacitive element Cbst form an output node N2. The other end of the boost capacitive element Cbst and the control terminal of the second transistor T2 are connected to a boost line BST and a reference line REF, respectively.Type: GrantFiled: October 5, 2011Date of Patent: February 3, 2015Assignee: Sharp Kabushiki KaishaInventors: Fumiki Nakano, Naoki Ueda, Yoshimitsu Yamauchi
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Publication number: 20150029081Abstract: Provided is a liquid crystal display device, including: a plurality of scanning connection lines formed on at least one side of edges of the image display region, the plurality of scanning connection lines connecting together a scanning signal drive circuit and a plurality of scanning signal lines; a selection circuit formed so as to be interposed between the plurality of scanning connection lines and the plurality of scanning signal lines, the selection circuit being configured to selectively short-circuit one of a plurality of the scanning signal lines to one of the plurality of scanning connection lines based on a selection signal; and a selection signal line connected to the selection circuit, the selection signal line transmitting the selection signal to the selection circuit.Type: ApplicationFiled: October 10, 2014Publication date: January 29, 2015Inventors: Genshiro KAWACHI, Kazuo KITA
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Patent number: 8941562Abstract: A display device which adjusts luminance of a display panel is disclosed. The display device senses light which leaks from a display area to a non-display area and adjusts the luminance of the display panel according to the sensed light.Type: GrantFiled: December 27, 2011Date of Patent: January 27, 2015Assignee: Samsung Display Co., Ltd.Inventors: Jong-Kwang Hwang, Sung-Gyu Kim
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Patent number: 8941572Abstract: A liquid crystal panel with an improved picture-quality and an LCD device having the same are disclosed. The liquid crystal panel and the LCD device allows a distance between a pixel electrode and a data line not connected to a thin film transistor and another distance between the pixel electrode and another data line to be asymmetrically formed within a single pixel region. Accordingly, the vertical cross-talk can be minimized, and furthermore picture-quality can be improved.Type: GrantFiled: August 24, 2009Date of Patent: January 27, 2015Assignee: LG Display Co., Ltd.Inventors: Chul Nam, Seung Ho Heo
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Patent number: 8941696Abstract: Disclosed is an LCD device having a structure such as a column inversion type or a Z-inversion type where a single data line can be shared by two neighboring pixels, and an inspection circuit and method thereof. The inspection circuit for outputting gate driving signals in a division manner into odd and even-numbered signals is provided between the gate driving unit and a pixel region, so that only color pixels to be inspected can be driven. This can allow pixels to be normally inspected in an LCD device having an enhanced column inversion structure.Type: GrantFiled: December 27, 2012Date of Patent: January 27, 2015Assignee: LG Display Co., Ltd.Inventor: MoonJung Choi
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Patent number: 8941573Abstract: The present invention provides a liquid crystal display panel and liquid crystal display device, which includes data lines, scan lines disposed in a crisscross manner with data lines, pixel electrode disposed within area formed by two adjacent scan lines and two adjacent data lines, and thin film transistor disposed at intersection points of data line and scan line; wherein drain terminal of thin film transistor having extension part acting as repair line for scan line, extension part extending along direction parallel to scan line and an end of extension part away from thin film transistor partially overlapping scan line.Type: GrantFiled: July 26, 2012Date of Patent: January 27, 2015Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventor: Shih-hsun Lo
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Patent number: 8941565Abstract: An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element (109) disposed in a pixel (104) are controlled by time, and the influence by the characteristic variability of a current controlling TFT (108) is prevented. When this method is used, a data signal side driving circuit (102) and a gate signal side driving circuit (103) are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.Type: GrantFiled: August 11, 2014Date of Patent: January 27, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yukio Yamauchi, Takeshi Fukunaga
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Publication number: 20150022510Abstract: An array substrate and a liquid crystal panel are disclosed. Each of the pixel cells in the array substrate includes a first pixel electrode, a second pixel electrode, and a third pixel electrode. The third pixel electrode connects to the second pixel electrode via a third transistor. In the 2D display mode, the third transistor is turn on such that the second pixel electrode and the third pixel electrode are electrically connected. At this moment, the three pixel electrodes are in the displaying state of corresponding 2D images. The voltage of the second pixel electrode is changed due to the voltage of the third pixel electrode. In the 3D display mode, the second pixel electrode and the third pixel electrode are not electrically connected such that the third pixel electrode is in the displaying state of the black images.Type: ApplicationFiled: July 24, 2013Publication date: January 22, 2015Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Xiaohui Yao, Je-hao Hsu, Juanning Dang
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Publication number: 20150015471Abstract: A liquid crystal panel includes a plurality of thin film transistors (TFTs), scan lines, data lines, a scan driving chip, and a data driving chip. The scan driving chip includes a compensation driving unit coupled to the scan lines. The compensation driving unit drives the TFTs corresponding to a next-row of scan line to turn on when the scan driving chip drives the TFTs corresponding to a current-row of scan line to turn on or after the scan driving chip drives the TFTs corresponding to the current-row of scan line to turn on. The compensation driving unit drives the TFTs corresponding to the next-row of scan line to turn off when the TFTs corresponding to the current-row of scan line receive a data signal of the data driving chip or before the TFTs corresponding to the current-row of scan line receive the data signal of the data driving chip.Type: ApplicationFiled: July 11, 2013Publication date: January 15, 2015Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTDInventor: Jiang Zhu
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Patent number: 8933861Abstract: Embodiments of the invention relate to a stereoscopic image display and a method for driving the same. Stereoscopic image display includes a data display unit including a first scan transistor, an active black stripe unit including a second transistor and a third transistor, and a shift register sequentially supplying the gate pulse to each of (2n?1)th gate lines and (2n)th gate lines, where n is a natural number. The first scan transistor supplies a data voltage to a pixel electrode in response to a gate pulse of a (2n?1)th gate line, the second transistor supplies the data voltage to the pixel electrode in response to the gate pulse of the (2n?1)th gate line, and the third transistor supplies a low logic level voltage or a common voltage to the pixel electrode in response to a gate pulse of a (2n)th gate line.Type: GrantFiled: December 7, 2011Date of Patent: January 13, 2015Assignee: LG Display Co., Ltd.Inventors: Daehyun Nam, Dosung Kim, Sunghak Jo, Seonghun Jeong
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Publication number: 20150009111Abstract: Provided are a pixel circuit and a display device which support multi-gradation display and can prevent display quality from deteriorating with low power consumption. A pixel circuit (3) includes a first switch circuit (22) provided between a pixel node Np of a display element unit (21) and a data signal line SL, and a memory circuit (23) which restores the pixel node to an initial voltage state, based on a hold voltage stored in a storage node Nm.Type: ApplicationFiled: December 14, 2012Publication date: January 8, 2015Inventor: Yoshimitsu Yamauchi
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Patent number: 8928563Abstract: A display device includes: a pixel array unit with pixel circuits disposed in matrix form, the pixel circuit including a driving transistor, an electro-optic element, a storage-capacitor, and a sampling transistor, with the electro-optic element emitting light by generating a driving current based on information stored in the storage-capacitor at the driving transistor to be applied to the electro-optic element; and a control unit, of which the output stage includes a buffer transistor, to output a pulse signal for driving the pixel array unit from the buffer transistor; wherein the pixel array unit and the control unit are formed with long laser beam irradiation to be scanned in the vertical direction; and with the control unit, buffer transistors for outputting a pulse signal for sampling to an input video signal to each signal line are arrayed in a column in the longitudinal direction of the laser beam irradiation.Type: GrantFiled: July 30, 2014Date of Patent: January 6, 2015Assignee: Sony CorporationInventors: Junichi Yamashita, Katsuhide Uchino
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Patent number: 8928704Abstract: An array substrate is disclosed. Data lines directly pass through the area where a secondary pixel electrode is located to input data signals to the secondary pixel electrode. First scanning lines, second scanning lines and switches are arranged between the adjacent pixels in an up-down direction. The area between the pixels is a dark area corresponding to an opaque area. Under a 3D display mode, a difference of the default voltages exists between a main pixel electrode and a secondary pixel electrode. In addition, a liquid crystal display is provided. By adopting the above design, the crosstalk and the color shift under the 3D display mode may be reduced. In addition, the reliability of the liquid crystal panel may be enhanced.Type: GrantFiled: October 25, 2012Date of Patent: January 6, 2015Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Cheng-hung Chen
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Patent number: 8928569Abstract: Disclosed is related with a LCD technology, and particularly to a driver of promoting pixel charging ability of a thin film transistor and a method thereof. The driver of promoting pixel charging ability of a thin film transistor comprises a thin film transistor, a first capacitor and a second capacitor. The source of the thin film transistor is coupled to the first capacitor and the second capacitor respectively. As the drain voltage switches from positive polarity to negative polarity or from negative polarity to positive polarity, a voltage different between a source voltage stored by the thin film transistor and the first capacitor voltage is higher than a predetermined value. The present invention is capable of promoting the charge current and the pixel charging ability. Meanwhile, the requirement of the metal line width can be diminished to improve aperture ratio and raise transmittance of product.Type: GrantFiled: August 12, 2011Date of Patent: January 6, 2015Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Chihtsung Kang
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Publication number: 20150002382Abstract: A driving circuit with a feed through voltage compensation includes multiple gate scanning lines, multiple storage capacitance lines and multiple stages of common driving units. The common driving unit includes a gate driver and a storage capacitance driver, where the gate driver is connected to a gate scanning line to output a gate scanning signal, and the storage capacitance driver is connected to a storage capacitance line to output a storage capacitance signal. The storage capacitance signal outputted from the storage capacitance driver is adapted to compensate the gate scanning signal output from the gate driver. The driving circuit with the feed through voltage compensation allows a large gate-to-drain parasitic capacitance of the pixel, and the width of the black matrix may become smaller; therefore the pixel aperture ratio may be increased, the cost may be reduced, or the power consumption may be reduced.Type: ApplicationFiled: April 2, 2014Publication date: January 1, 2015Applicants: Tianma Micro-Electronics Co., Ltd., Shanghai AVIC Optoelectronics Co., Ltd.Inventor: Zhaokeng CAO
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Publication number: 20150002558Abstract: A pixel includes five transistors and a capacitor. A first transistor controls current to be supplied to a light-emitting element. A second transistor is connected between a gate electrode of the first transistor and a first power supply. A third transistor is connected between the gate electrode of the first transistor and a second terminal of the first transistor. The capacitor is coupled between the third transistor and the second terminal of the first transistor. The fourth transistor is connected between the second terminal of the first transistor and a second power supply. The fifth transistor is connected between the second terminal of the third transistor and a signal line. The capacitor may be the only capacitor in the pixel, and the signal line may receive an initialization voltage and a gray scale data voltage.Type: ApplicationFiled: July 1, 2014Publication date: January 1, 2015Inventors: Masayuki KUMETA, Takeshi OKUNO, Eiji KANDA, Ryo ISHII, Naoaki KOMIYA
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Patent number: 8922469Abstract: A display panel includes a first sub-pixel electrode and a second sub-pixel electrode alternating with each other to form a horizontal electric field, a first data line transmitting a first data voltage to the first sub-pixel electrode, and a second data line transmitting a second data voltage to the second sub-pixel electrode, wherein the second sub-pixel electrode is formed to overlap the first and second data lines.Type: GrantFiled: October 14, 2009Date of Patent: December 30, 2014Assignee: Samsung Display Co., Ltd.Inventors: Kwang-Chul Jung, Chong-Chul Chai, Mee-Hye Jung
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Publication number: 20140375535Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a driver and a control circuit. The control circuit is configured to cause the driver to carry out one of an ordinary driving and an intermittent driving, which is set by switching. The control circuit supplies signals to a plurality of pixel electrodes of each of columns of the pixel electrodes in each of frame periods in the intermittent driving, the supplied signals having polarities inverted in units of at least one row.Type: ApplicationFiled: June 3, 2014Publication date: December 25, 2014Applicant: Japan Display Inc.Inventors: Yukio TANAKA, Daiichi SUZUKI, Kenji NAKAO
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Patent number: 8917228Abstract: The invention discloses a liquid crystal display apparatus and a pixel element design thereof. The liquid crystal display apparatus includes a register, a liquid crystal display panel, a driving circuit, a dynamic frequency adjustment unit and a control circuit. The liquid crystal display panel includes a plurality of liquid crystal capacitors and a plurality of pixel units. The driving circuit includes a plurality of storage capacitors corresponding to the liquid crystal capacitors. A capacitance of the storage capacitors far exceeds a capacitance of the liquid crystal capacitors. The driving circuit casts the image information on the liquid crystal display panel. The dynamic frequency adjustment unit computes and judges based on an image characteristic classification of the image information, so as to generate a display mode control signal dynamically.Type: GrantFiled: December 28, 2011Date of Patent: December 23, 2014Inventor: Hung-Ta Liu
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Publication number: 20140368417Abstract: In a liquid crystal display device including a plurality of pixels in a display portion and configured to performed display in a plurality of frame periods, each of the frame periods includes a writing period and a holding period, and after an image signal is input to each of the plurality of pixels in the writing period, a transistor included in each of the plurality of pixels is turned off and the image signal is held for at least 30 seconds in the holding period. The pixel includes a semiconductor layer including an oxide semiconductor layer, and the oxide semiconductor layer has a carrier concentration of less than 1×1014/cm3.Type: ApplicationFiled: September 4, 2014Publication date: December 18, 2014Inventors: Shunpei YAMAZAKI, Ryo ARASAWA, Jun KOYAMA, Masashi TSUBUKU, Kosei NODA
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Patent number: 8912990Abstract: Systems, methods, and devices are disclosed, including a device having a liquid-crystal display (LCD) panel that includes a transistor-degradation circuit. In some embodiments, the transistor-degradation circuit is configured to output a signal indicative of a change in a property of a transistor on the LCD panel over time.Type: GrantFiled: December 9, 2008Date of Patent: December 16, 2014Assignee: Apple Inc.Inventors: Carlin Vieri, Ahmad Al-Dahle, Yongman Lee, Wei Yao
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Patent number: 8907881Abstract: In the liquid crystal display device, image signals are concurrently supplied to pixels provided in a plurality of rows among pixels arranged in matrix in a pixel portion where input of image signals is controlled by transistors including polycrystalline semiconductors or single crystal semiconductors in channel formation regions. Thus, the image quality of the liquid crystal display device can be improved.Type: GrantFiled: April 1, 2011Date of Patent: December 9, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Hiroyuki Miyake, Shunpei Yamazaki
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Publication number: 20140354590Abstract: An in-cell multi-touch panel system includes: an in-cell touch display panel, a touch display control system. In a first frame time interval, the touch display control system drives the in-cell touch display panel and samples the sensing voltage from the in-cell touch display panel to determine whether there is an approaching external object and noise interference. In a second frame time interval, the touch display control system finds out a frequency with minimum noise for use as a frequency of the touch driving signal when the noise interference exists. In a third frame time interval, the touch display control system is based on the frequency with minimum noise to correspondingly generate the touch driving signal so as to determine whether there is an approaching external object.Type: ApplicationFiled: May 28, 2014Publication date: December 4, 2014Applicant: Orise Technology Co., Ltd.Inventors: Hsin-Hao WANG, Yen-Lin HUANG
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Patent number: 8902145Abstract: To suppress fluctuation in the threshold voltage of a transistor, to reduce the number of connections of a display panel and a driver IC, to achieve reduction in power consumption of a display device, and to achieve increase in size and high definition of the display device. A gate electrode of a transistor which easily deteriorates is connected to a wiring to which a high potential is supplied through a first switching transistor and a wiring to which a low potential is supplied through a second switching transistor; a clock signal is input to a gate electrode of the first switching transistor; and an inverted clock signal is input to a gate electrode of the second switching transistor. Thus, the high potential and the low potential are alternately applied to the gate electrode of the transistor which easily deteriorates.Type: GrantFiled: November 4, 2011Date of Patent: December 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Atsushi Umezaki, Hiroyuki Miyake
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Patent number: 8902144Abstract: It is an object to decrease the number of transistors connected to a capacitor. In a structure, a capacitor and one transistor are included, one electrode of the capacitor is connected to a wiring, and the other electrode of the capacitor is connected to a gate of the transistor. Since a clock signal is input to the wiring, the clock signal is input to the gate of the transistor through the capacitor. Then, on/off of the transistor is controlled by a signal which synchronizes with the clock signal, so that a period when the transistor is on and a period when the transistor is off are repeated. In this manner, deterioration of the transistor can be suppressed.Type: GrantFiled: November 9, 2009Date of Patent: December 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Atsushi Umezaki
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Patent number: 8902146Abstract: An array substrate of an LCD having: a gate line formed along a first direction; a data line formed along a second direction crossing the first direction; first and second pixel electrodes spaced apart from each other; a thin-film transistor includes a gate electrode connected to the gate line; a source electrode connected to the data line and partially overlapping the second pixel electrode; and a drain electrode connected to the first pixel electrode spaced apart from the second pixel electrode along the second direction. The source electrode or the gate electrode overlaps the second pixel electrode but the drain electrode does not overlap the second pixel electrode. Electrical coupling between the first and second pixel electrodes are avoided with such configuration.Type: GrantFiled: July 17, 2013Date of Patent: December 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Beom-Jun Kim, Hee-Joon Kim, Hong-Woo Lee, Hye-Rhee Han, Hyeong-Jun Park, Jin-Suk Seo
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Method of detecting touch positions and touch position detection apparatus for performing the method
Patent number: 8902189Abstract: A method of detecting touch positions includes; providing an external power voltage which drives a touch panel, sequentially turning on a plurality of lower driving elements connected to the touch panel, Turning on a plurality of upper driving elements connected to the touch panel to readout at least one multi-touched position corresponding to an x-coordinate, while each of lower driving elements is turned on, receiving readout position information corresponding to an x-coordinate, turning on at least one of the upper driving elements connected to the touch panel, turning on the plurality of lower driving elements connected to the touch panel to readout the at least one multi-touched position corresponding to a y-coordinate, while each of upper driving elements is turned on, receiving readout position information corresponding to the y-coordinate, turning on a sensing element, and turning off the sensing element.Type: GrantFiled: September 29, 2009Date of Patent: December 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Se-Ki Park, Sung-Kyu Lee, Yong-Woo Lee, Byung-Duk Yang, Dong-Min Yeo -
Publication number: 20140347261Abstract: An array substrate and a liquid crystal panel are disclosed. The first scanning line is configured to turn on or off the first switch and the second switch. The data line connects to the first pixel electrode and the second pixel electrode respectively by a first switch and a second switch. The second scanning line is configured to turn on or off the third switch. The input end of the third switch connects to one of the pixel electrode. The output end of the third switch and the common electrodes are connected. With the above configuration, the aperture rate in the 2D display mode is enhanced and the cross talk in 3D display mode is reduced. In addition, the number of the data driven chips is also reduced so as the manufacturing cost.Type: ApplicationFiled: June 27, 2013Publication date: November 27, 2014Inventors: Jingfeng Xue, Je-hao Hsu
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Publication number: 20140347342Abstract: A level shifter circuit has a plurality of channels for providing signals to a capacitive load and has circuits for sharing charge stored in the capacitive load between the channels. A first pair of channel clock generating circuits are coupled respectively to a first pair of channels. A second pair of channel clock generating circuits are coupled respectively to a second pair of channels. A pair of switches couple the first pair of channels together and the second pair of channels together, respectively, for sharing charge between the channels. A single resistor is coupled in circuit with all of the channels for controlling a slope of charge sharing between channels.Type: ApplicationFiled: December 19, 2013Publication date: November 27, 2014Inventors: Stefan A. Reithmaier, Josy Bernard, Carsten I. Stoerk, Nicolas M. Guibourg
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Patent number: 8896778Abstract: It is an object to provide a liquid crystal display device including a thin film transistor with high electric characteristics and high reliability. As for a liquid crystal display device including an inverted staggered thin film transistor of a channel stop type, the inverted staggered thin film transistor includes a gate electrode, a gate insulating film over the gate electrode, a microcrystalline semiconductor film including a channel formation region over the gate insulating film, a buffer layer over the microcrystalline semiconductor film, and a channel protective layer which is formed over the buffer layer so as to overlap with the channel formation region of the microcrystalline semiconductor film.Type: GrantFiled: April 26, 2011Date of Patent: November 25, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8896505Abstract: A display, including a substrate having a display area including first and second non-overlapping pixel groups and a gutter located between the first and second pixel groups, the gutter having a dimension in a first direction separating the first and second pixel groups, and each pixel group includes a plurality of pixels, each pixel having three or more differently colored sub-pixels; and wherein the pixel centers of the pixels in each pixel group are arranged in a regular two-dimensional array having one dimension parallel to the first direction, and wherein the pixels within a pixel group are separated by an inter-pixel separation in the first direction; and one or more electrical elements arranged within the gutter, each subpixel being connected to one of the one or more electrical elements, wherein the gutter dimension is greater than the inter-pixel separation, so that artifacts in a displayed image are reduced.Type: GrantFiled: June 12, 2009Date of Patent: November 25, 2014Assignee: Global OLED Technology LLCInventors: Ronald S. Cok, Michael E. Miller
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Patent number: 8896510Abstract: A display device includes an image signal modifier for modifying input image signals based on the difference between the input image signal for a pixel in a first row and the input image signal for the pixel in the adjacent row. The gate-on voltages includes a pre-charging voltage and a main charging voltage, the main charging voltage for the first row overlaps the pre-charging voltage for the second row and the pre-charging voltage for the first grow overlaps the main charging voltage for the second row for a predetermined time. The first data voltage is applied to the pixels of the first and second rows after application of the main charging gate-on voltage for the first row and the pre-charging gate-on voltage for the row, and the second data voltage is applied to the pixel of the second row after application of the main charging gate-on voltage for the second row.Type: GrantFiled: August 29, 2006Date of Patent: November 25, 2014Assignee: Samsung Display Co., Ltd.Inventor: Baek-Woon Lee
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Patent number: 8896503Abstract: The present invention sets power supply drive signals DS[1] and DS[2] at a power supply voltage Vcc in a timesharing for odd lines and their subsequent even lines and sets a write signal WS to correspond to the time division setting, thereby sharing a scan line of the write signal WS between the odd lines and the subsequent even lines.Type: GrantFiled: July 27, 2009Date of Patent: November 25, 2014Assignee: Sony CorporationInventors: Tomoaki Handa, Junichi Yamashita, Katsuhide Uchino
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Patent number: 8890784Abstract: The present invention provides a method for speeding up rotation of liquid crystal molecule and a liquid crystal panel drive circuit used in the method. The method includes providing a liquid crystal display device, which includes a glass substrate having a liquid crystal panel drive circuit formed thereon and including a timing controller and pixel units each including a thin-film transistor, a common electrode, a pixel electrode electrically connected to the thin-film transistor, a compensation unit, and a storage capacitor, the compensation unit including a compensation capacitor, the timing controller being electrically connected to the compensation unit and the pixel electrode; calculating discharging/charging time of the compensation capacitor; activating the liquid crystal display device, where the source driver applies a drive voltage via the thin-film transistor to the pixel electrode; and the timing controller controlling the compensation unit to conduct on or cut off according to the drive voltage.Type: GrantFiled: November 6, 2012Date of Patent: November 18, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventors: Yinhung Chen, Xia Tian, Pei Jia