Optical Addressing (e.g., Photodetection) Patents (Class 345/81)
  • Patent number: 10186190
    Abstract: A method and system of compensating for localized phenomena in a display is disclosed. The display includes an array of pixels and a control system for adjusting content data signals for the array of pixels to compensate for aging of the pixels in the array. The control system measures a parameter of at least one of the pixels in the array via a read input of the at least one of the pixels. The controller determines the effect of the localized phenomena on the pixel using the parameter. A characteristic is measured for at least one of the pixels in the array via the read input of the at least one of the pixels. The measured characteristic is adjusted to reduce the effect of the localized phenomena. An adjusted aging compensation value based on the adjusted measured characteristic is calculated by the controller. The aging compensation value is applied to a data content signal to at least one of the pixels.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: January 22, 2019
    Assignee: Ignis Innovation Inc.
    Inventors: Gholamreza Chaji, Mehdi Torbatian
  • Patent number: 10163398
    Abstract: A method of driving a display panel includes adjusting a level of a data sustaining voltage or an on bias voltage during an on bias compensating period, applying the on bias voltage to pixels through data lines during an on bias period, which is subsequent to the on bias compensating period, to adjust a voltage level of control electrodes of driving transistors of the pixels, initiating a voltage of anode electrodes of organic light emitting elements of the pixels during an initiating period, applying data voltages to the pixels through the data lines during a scanning period, and turning on the organic light emitting elements of the pixels during an emission period.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 25, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soo-Kyung Kim, Hyo-Jin Lee, Dong-Hoon Chae
  • Patent number: 9898967
    Abstract: A driving voltage control method and apparatus, an array substrate, and a display device, wherein a plurality of predetermined areas (11a) are preset within a display area (11), and corresponding to any of the predetermined areas, the apparatus comprises an acquisition module (21) configured to acquire a luminance value of a pixel cell with the maximum luminance within the predetermined area (11a) in any frame, a search module (22) configured to search a preset table for a corresponding driving voltage value according to the luminance value acquired by the acquisition module and a control module (23) configured to control a driving voltage outputted to all the pixel cells within the predetermined area (11a) in a next frame according to the driving voltage value obtained by the search module. The driving voltage for the display device in any image can be reduced without affecting the display effect of the image.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: February 20, 2018
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Ming Liu, Lintao Zhang
  • Patent number: 9812048
    Abstract: A starting method for a liquid crystal display, which includes: after receiving a control command for starting, reading a checking code of a control code for indicating to perform a predetermined screen processing from a flash memory on a photoelectronic board; comparing the checking code read from the flash memory on the photoelectronic board with the checking code stored in a flash memory on a control board; performing the predetermined screen processing based on the read control code for indicating to perform the predetermined screen processing. By adopting the above starting method of the liquid crystal display, starting time of the liquid crystal display is effectively shortened.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: November 7, 2017
    Assignee: SHENZHEN CHINA STAR OPTOELECTRON ICS TECHNOLOGY CO., LTD.
    Inventors: Yu Wu, Lei Wang
  • Patent number: 9767762
    Abstract: In the 1st case, which is the case of driving a color display panel, pieces of color image data corresponding to 1st to 3rd colors are received in parallel, and in a horizontal scan period, pixels connected to ith to (i+2)th gate lines from among 1st to nth gate lines are driven according to the pieces of color image data corresponding to the 1st to 3rd colors. In the 2nd case, which is the case of driving a monochrome display panel, pieces of monochrome image data (DM1[7:0] to DM3[7:0]) for three horizontal scan lines are received in parallel, and in a horizontal scan period, pixels connected to jth to (j+2)th gate lines from among 1st to mth gate lines (gate lines G1 to G960) are driven according to the pieces of monochrome image data (DM1[7:0] to DM3[7:0]).
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: September 19, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Masahiko Miura
  • Patent number: 9761170
    Abstract: A method and system of compensating for localized phenomena in a display is disclosed. The display includes an array of pixels and a control system for adjusting content data signals for the array of pixels to compensate for aging of the pixels in the array. The control system measures a parameter of at least one of the pixels in the array via a read input of the at least one of the pixels. The controller determines the effect of the localized phenomena on the pixel using the parameter. A characteristic is measured for at least one of the pixels in the array via the read input of the at least one of the pixels. The measured characteristic is adjusted to reduce the effect of the localized phenomena. An adjusted aging compensation value based on the adjusted measured characteristic is calculated by the controller. The aging compensation value is applied to a data content signal to at least one of the pixels.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: September 12, 2017
    Assignee: Ignis Innovation Inc.
    Inventors: Gholamreza Chaji, Mehdi Torbatian
  • Patent number: 9734761
    Abstract: The present disclosure relates to the art of display manufacture. There are provided a pixel circuit, a driving method for the same and a display device.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 15, 2017
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Tae Gyu Kim, Tuo Sun
  • Patent number: 9729242
    Abstract: The present invention provides an optical module capable of achieving downsizing and high densification, and reducing crosstalk as compared to a conventional optical module. An optical module includes: an optical device including multiple light receiving elements; a control device which transmits and receives signals to and from the optical device; and a substrate including multiple lines which allow passage of the signals. Anode terminals of the multiple light receiving elements are connected to different lines by first wires, respectively. Cathode terminals of the multiple light receiving elements are connected to different lines by second wires, respectively. Each first wire and the corresponding second wire cross each other and are disposed out of contact with each other. The wires connecting each light receiving element and the control device, namely, the wires of each channel cross each other.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 8, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuya Nagashima, Yozo Ishikawa
  • Patent number: 9632344
    Abstract: A system and method for implementing a display which also serves as one or more of a tactile user interface touchscreen, proximate hand gesture sensor, light field sensor, lensless imaging camera, document scanner, fingerprint scanner, and secure optical communications interface. In an implementation, an OLED array can be used for light sensing as well as light emission functions. In one implementation a single OLED array is used as the only optoelectronic user interface element in the system. In another implementation two OLED arrays are used, each performing and/or optimized from different functions. In another implementation, an LCD and an OLED array are used in various configurations. The resulting arrangements allow for sharing of both optoelectric devices as well as associated electronics and computational processors, and are accordingly advantageous for use in handheld devices such as cellphone, smartphones, PDAs, tablet computers, and other such devices.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: April 25, 2017
    Inventor: Lester F. Ludwig
  • Patent number: 9633606
    Abstract: A device for driving a light-emitting diode, a light-emitting device, and a display device are disclosed. The disclosed light-emitting diode driving device may include: a first transistor having a first conductive electrode connected with a source voltage terminal and having a second conductive electrode connected with an input terminal of the light-emitting diode; a second transistor having a control electrode connected with the second conductive electrode of the first transistor; and a capacitor having one end connected with a data voltage terminal and having the other end connected with a first node, which is connected with a control electrode of the first transistor and with a first conductive electrode of the second transistor.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: April 25, 2017
    Assignee: Foundation of Soongsil University-Industry Cooperation
    Inventors: Ho-Jin Lee, Yong-Chan Kim, Sung-Young Seo
  • Patent number: 9465429
    Abstract: A multifunctional pixel is disclosed. The multifunctional pixel may include a display pixel, a photoelectric sensor, and a second sensor. The second sensor may include one of the following: an ultrasonic sensor and an infrared sensor. The display pixel, the photoelectric sensor, and the second sensor may be located in the multifunctional pixel.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 11, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Jack Conway Kitchens, II, John Keith Schneider, David William Burns, Suryaprakash Ganti
  • Patent number: 9368558
    Abstract: An organic light emitting element includes an organic light emitting diode formed on a substrate, coupled to a transistor including a gate, a source and a drain and including a first electrode, an organic thin film layer and a second electrode; a photo diode formed on the substrate and having a semiconductor layer including a high-concentration P doping region, a low-concentration P doping region, an intrinsic region and a high-concentration N doping region; and a controller that controls luminance of light emitted from the organic light emitting diode, to a constant level by controlling a voltage applied to the first electrode and the second electrode according to the voltage outputted from the photo diode.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: June 14, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yun-gyu Lee, Byoung-deog Choi, Hye-hyang Park, Ki-ju Im
  • Patent number: 9246117
    Abstract: Described is an (organic) light-emitting diode ((O)LED) wherein the light-emitting layer comprises a blend of an electroluminescent semiconducting material with a ferro-electric material. Either of the electrodes forms a modulatable injection barrier with the ferro-electric material, the modulation requiring a voltage Vm serving to polarize or repolarize the ferro-electric material. With Vm being larger than the voltage Ve required for light emission, the (O)LED can be turned “on” or “off” by applying a pulse voltage to (re)polarize the ferro-electric material.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: January 26, 2016
    Assignees: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, IMEC vzw
    Inventors: Paulus Wilhelmus Maria Blom, Bert De Boer, Sandra De Boer-Douwsma, Kamal Asadi
  • Patent number: 9235291
    Abstract: In a display device with optical sensors, a mode control portion (24) determines a mode to be a normal mode in which to operate a recognition processing portion (22) or a standby mode in which to stop the recognition processing portion (22) from operating. In transition from the normal mode to the standby mode, a decimated image memory (25) stores a decimated image having a smaller number of pixels than a scan picture. The mode control portion (24) performs pixel-by-pixel comparison between the stored decimated image and an image supplied anew, which is obtained by averaging decimated images for two consecutive frames, and causes transition from the standby mode to the normal mode when the number of pixels whose difference in pixel values is greater than or equal to a first threshold is greater than or equal to a second threshold. As a result, it is rendered possible to inhibit erroneous determination and promptly detect a touch position after a quick exit from the standby mode.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: January 12, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Atsushi Okada, Kazuhiro Maeda, Ichiroh Shiraki
  • Patent number: 9057926
    Abstract: An array of pixel assemblies emitting multiple wavelengths in a direction and a method therefor, the array comprising: a plurality of pixel assemblies, each respective pixel assembly having a respective pixel area, the respective pixel assembly formed by: one or more waveguides made from electro-optically active material; a plurality of different wavelength emitters, the different wavelength emitters disposed at one or more of the ends of the respective one or more waveguides to propagate their respective wavelengths therealong and capable of being switched; and a one switch disposed to cause when activated, a shifting of the wavelengths propagating in the one or more waveguides of the pixel assembly by substantially 90 degrees to be emitted through the respective pixel area; and a backplane with an electronic circuit for switching the plurality of switches and the emitters.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: June 16, 2015
    Assignee: Rockwell Collins, Inc.
    Inventor: Robert G. W. Brown
  • Patent number: 9013372
    Abstract: Disclosed herein is a display apparatus, including: a pixel array section including a plurality of pixels, a writing transistor, a driving transistor, a first switching transistor, a holding capacitor, and a second switching transistor; a first scanning section configured to drive the writing transistor in a unit of a row of the pixels; a second scanning section configured to drive the switching transistors in synchronism with scanning by the first scanning section; and a third scanning section configured to control the second switching transistors to a non-conducting state within a period after the image signal is written by the writing transistor until the signal writing period of the same row of the pixels ends but to a conducting state within any other period.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: April 21, 2015
    Assignee: Sony Corporation
    Inventors: Yutaka Mitomi, Masatsugu Tomida, Katsuhide Uchino
  • Patent number: 8994635
    Abstract: The invention provides an image display device capable of reducing the transmission delay of a scanning signal. A plurality of scanning signal lines are wired in one pixel circuit row. Pixel circuits of the pixel circuit row are connected to any of the plurality of scanning signal lines.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: March 31, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenta Kajiyama, Takeshi Izumida, Norihiro Nakamura, Naoki Tokuda
  • Patent number: 8988331
    Abstract: There is provided an optical recording display device having a display section. The display section includes: a plurality of pixels; a plurality of pixel electrodes each of which is formed for each of the plurality of pixels, and is connected to a transistor; a common electrode which is opposite to the plurality of pixel electrodes, and an electro-optical material layer having a memory property which is disposed between the plurality of pixel electrodes and the common electrode; a plurality of scanning lines which is respectively connected to a gate of the transistor and is connected to each other in a direct manner or through an electric circuit; and a plurality of data lines which is respectively connected to a source of the transistor and is connected to each other in a direct manner or through an electric circuit.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: March 24, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Katsunori Yamazaki
  • Patent number: 8976155
    Abstract: A semiconductor device includes a photodiode, a first transistor, a second transistor, and a third transistor. The second transistor and the third transistor have a function of retaining a charge accumulated in a gate of the first transistor. In a period during which the second transistor and the third transistor are off, a voltage level of a voltage applied to a gate of the second transistor is set to be lower than a voltage level of a source of the second transistor and a voltage level of a drain of the second transistor, and a voltage level of a voltage applied to a gate of the third transistor is set to be lower than a voltage level of a source of the third transistor and a voltage level of a drain of the third transistor.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: March 10, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Munehiro Kozuma, Takeshi Aoki
  • Patent number: 8960919
    Abstract: An image projection device includes a number-of-times measurement section that measures the number of passage times that the scanned laser light has passed through the light radiation members, a time measurement section that is triggered to measure an elapsed time when the number-of-times measurement section measures the number of passage times, an arithmetic section that calculates an initial timing at which the laser light source section starts outputting the laser light based on the measurement results of the number-of-times measurement section and the time measurement section, and a signal generation section that generates the switch signal at the initial timing calculated by the arithmetic section.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 24, 2015
    Assignee: NEC Corporation
    Inventor: So Nishimura
  • Patent number: 8952946
    Abstract: A display panel, ensuring high photo-detection accuracy in a region near a frame area, is provided. The display panel includes: image display elements disposed in an effective display area of a display screen; a light-shielding layer disposed in a frame area around the effective display area; and photo-detection elements disposed in the effective display area or in both of the effective display area and the frame area. The photo-detection elements detect the invisible light. The light-shielding layer transmits invisible light, while shields visible light.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: February 10, 2015
    Assignee: Sony Corporation
    Inventors: Yoko Fukunaga, Tetsuro Ochi, Daisuke Takama, Yasuyuki Matsui
  • Patent number: 8937584
    Abstract: An organic light emitting display includes a display unit that includes scan lines and data lines. First sub-pixels, second sub-pixels, and third sub-pixels that emit light corresponding to different colors are repeatedly arranged in a uniform pattern. The organic light emitting display also includes a scan driver for supplying scan signals to the scan lines; a data driver coupled to one end of each of the data lines for supplying data signals to the data lines; a switch unit coupled between the one end of each of the data lines and the data driver to transmit the data signals supplied from output lines of the data driver to the data lines; and a test circuit unit including transistors coupled to other ends of the data lines. The first sub-pixels and the second sub-pixels are alternately arranged in same columns and the third sub-pixels are arranged in columns adjacent to the same columns.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: January 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Won-Kyu Kwak, Dong-Wook Park, Hae-Jin Chun
  • Patent number: 8928627
    Abstract: A light sensing circuit using an oxide semiconductor transistor, a method of manufacturing the light sensing circuit, and an optical touch panel including the light sensing circuit. Because the light sensing circuit includes only one light sensor transistor and one switch transistor formed on the same substrate, a structure of the light sensing circuit is simplified. Furthermore, because the light sensor transistor and the switch transistor have the same structure, a method of manufacturing the light sensing circuit is also simplified. Also, since an optical touch panel or an image acquisition apparatus using the light sensing circuit uses the light sensing circuit having a simple structure and does not use a capacitor, the optical touch panel or the image acquisition apparatus may be made thinner and larger.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: January 6, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-hun Jeon, I-hun Song, Seung-eon Ahn, Chang-jung Kim
  • Patent number: 8872299
    Abstract: A semiconductor device capable of high-speed operation. The semiconductor device includes a first transistor, a second transistor, and a capacitor. One of a source and a drain of the first transistor is supplied with a first signal. One of a source and a drain of the second transistor is supplied with a first potential. A gate of the second transistor is supplied with a second signal. A first electrode of the capacitor is electrically connected to the other of the source and the drain of the first transistor. A second electrode of the capacitor is electrically connected to the other of the source and the drain of the second transistor. In a first period, the first signal is low and the second signal is high. In a second period, the first signal is high and the second signal is either low or high.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: October 28, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Atsushi Umezaki
  • Patent number: 8872736
    Abstract: An emission control circuit for controlling emission of R, G, B EL elements and method for driving an organic light emitting diode display using the same. An emission control signal generating circuit of a flat panel display includes a plurality of pixels. Each pixel includes a plurality of EL elements, and emission of the elements is controlled by emission control signals. The circuit includes a first signal generating device for generating one of the emission control signals, and a plurality of second signal generating devices for generating other ones of the emission control signals using an output signal of the first signal generating device and an external control signal. The first signal generating device may include a shift register. Each of the plurality of second signal generating devices may include a NAND gate using the external signal and the external control signal, or an inverted signal thereof, as two inputs.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: October 28, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Dong-Yong Shin
  • Patent number: 8830217
    Abstract: A lightweight, thin, small size semiconductor device is provided. A pixel has a display portion, and a light receiving portion comprising a photodiode. A transistor is used with the semiconductor device for controlling the operation of the display portion and the light receiving portion.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 9, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama
  • Patent number: 8823606
    Abstract: An EL display apparatus according to the present invention includes EL device (15) adapted to emit light at a luminance corresponding to a current fed thereto. A source driver (14) outputs a current higher than a current corresponding to an image signal to the EL device (16) through a source signal line (18). This operation charges/discharges a parasitic capacitance present in the source signal line (18). A transistor (11d) formed between the EL device (15) and the source driver (14) operates so that the EL device (15) is fed with the current for only a part of a one-frame period. As a result, the El device (15) emits light for only the part of the period.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: September 2, 2014
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 8810555
    Abstract: Method, apparatus and systems for driving electroluminescent segments in electroluminescent displays are disclosed. Each segment in the display receives a series of first pulses alternating in polarity at a first electrode and a series of second pulses at a second electrode. Each of the second pulses corresponds to one of the first pulses and is opposite in polarity. The width of the second pulses corresponds to the parasitic resistance of the segment.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: August 19, 2014
    Assignee: Scobil Industries Corp.
    Inventors: William Joseph Pietro, Scott Stephen Fielder
  • Patent number: 8803772
    Abstract: Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: August 12, 2014
    Assignee: Prysm, Inc.
    Inventors: David L. Kent, Phillip H. Malyak, Roger A. Hajjar, Patrick Tan, David Kindler
  • Patent number: 8743077
    Abstract: The present invention relates to a front light system which can be built with thin film light emitting diodes (LEDs), such as organic light emitting diodes (OLEDs) or electro-luminescent light emitting diodes. The front light system may be built on a thin and flexible substrate and can generate lighting of satisfactory uniformity and with high efficiency. The system also can potentially be inexpensive. The front light system of the present invention is particularly suitable for keymat applications wherein a flexible reflective display on top of a touch sensitive surface or device, is used as an output device.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: June 3, 2014
    Assignee: SiPix Imaging, Inc.
    Inventor: Robert A. Sprague
  • Patent number: 8717342
    Abstract: A scanning projector includes an optical filter. The optical filter exhibits a variable attenuation as a function of position. The scanning projector may scan sinusoidally in at least one dimension. The variable attenuation of the optical filter compensates for brightness variations due to sinusoidal scanning.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: May 6, 2014
    Assignee: Microvision, Inc.
    Inventor: Bruce C. Rothaar
  • Patent number: 8704737
    Abstract: A method of driving a pixel element an active matrix display. The method inducing a change of the bias voltage of the first transistor towards the threshold voltage thereof with a current passing through a resistive element in the pixel element to cause the bias voltage of the first transistor at time t linearly depend upon an exponential decaying function exp(?t/?) with a predetermined time constant ?. The method also includes terminating light emitted from the light-emitting element after the bias voltage of the first transistor becomes substantially close to the threshold voltage of the first transistor.
    Type: Grant
    Filed: January 20, 2013
    Date of Patent: April 22, 2014
    Inventor: Nongqiang Fan
  • Patent number: 8698713
    Abstract: Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: April 15, 2014
    Assignee: Prysm, Inc.
    Inventors: Roger A. Hajjar, David Kent, Phillip H. Malyak
  • Patent number: 8686928
    Abstract: A self light emitting device having a function of correcting drops in brightness in self light emitting elements in a pixel portion, and capable of displaying a uniform image without brightness irregularities, is provided. A specific test pattern is displayed when an electric power source is connected, brightnesses are detected by photoelectric conversion elements arranged in each pixel, and then stored in a memory circuit. A correction circuit then corrects a first image signal based on portions which are insufficient from standard brightnesses (brightnesses of normal self light emitting elements at the same gray stale, stored in advance), and a second image signal is obtained. Display of an image in a display device is performed in accordance with the second image signal.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: April 1, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Yoshifumi Tanada
  • Patent number: 8681137
    Abstract: Various embodiments of an ambient light sensor configured to determine the direction of a beam of light incident thereon are disclosed. In one embodiment, an ambient light sensor is provided that comprises a plurality of light detectors arranged in a spatial array upon a light sensing surface. Each of the light detectors in the array is configured to generate an analog output voltage in response to the beam of ambient light falling thereon. The amount of light incident on the individual light detectors in the spatial array varies according to the position of each such sensor with respect to direction of the beam of ambient light. An analog-to-digital converter (ADC) is operably coupled to the plurality of light detectors and is configured to receive the analog output signals generated thereby as inputs thereto, and to provide digital output values representative of the analog signals.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: March 25, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Chee Heng Wong, Yu Feng Yao, Sze Ping Ong
  • Patent number: 8669922
    Abstract: An image display panel includes: a lower substrate; self-light emitting elements for image display that are arranged on the lower substrate in a matrix shape and form an image display unit; a self-light emitting element for monitoring that is arranged on the lower substrate and emits monitoring light for the image display unit; and an upper substrate that holds the self-light emitting elements for image display and the self-light emitting element for monitoring in conjunction with the lower substrate, wherein the self-light emitting elements for image display emit emission light to the lower substrate side or the upper substrate side, and the self-light emitting element for monitoring emits the monitoring light to at least the upper substrate side or the lower substrate side.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: March 11, 2014
    Assignee: Sony Corporation
    Inventor: Mitsuru Asano
  • Patent number: 8659511
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: February 25, 2014
    Assignees: Samsung Display Co., Ltd., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Publication number: 20140022151
    Abstract: A mobile controller application for wirelessly controlling the non-structural appearance of a configurable organic light-emitting diode (OLED) object. A configurable OLED object is fitted with a flexible OLED, a power source, and one or more receptors. A mobile controller application instructs a mobile controller device to send signals, indicating a particular color or display pattern, to one or more receptors embedded in a configurable OLED object. An OLED object receives signals and updates it's non-structural display accordingly. A mobile controller application operates on a mobile controller device. A mobile controller device is preferably a mobile device conventionally used for cell network communication. A mobile controller application enables a user to preview, select, and transmit a display pattern to a configurable OLED object.
    Type: Application
    Filed: July 12, 2013
    Publication date: January 23, 2014
    Inventor: Michael Andrew Cuff
  • Patent number: 8624806
    Abstract: A pixel circuit and an organic light-emitting diode (OLED) display using the pixel circuit is provided. The pixel circuit includes: an OLED; a third N-channel metal-oxide semiconductor (NMOS) transistor coupled to a data line and a first scan line and configured to apply a data signal to a first node; a storage capacitor having one terminal coupled to the first node and the other terminal coupled to a second node; a fourth NMOS transistor coupled between a first power and the second node and configured to apply a voltage of the first power to the second node; a first NMOS transistor having a first electrode, a second electrode, and a gate electrode coupled to the second node; and a second NMOS transistor coupled between the second node and the first electrode of the first NMOS transistor and configured to diode-connect the first NMOS transistor.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co, Ltd.
    Inventors: Bo-Yong Chung, Keum-Nam Kim
  • Patent number: 8593445
    Abstract: A display apparatus employs a pixel array section including pixel circuits forming a matrix, signal lines as columns, scan lines as rows and power-supply lines, and driving sections. The driving sections are a signal selector, a write scanner and a drive scanner. The signal selector provides an electric potential representing a gradation or a predetermined reference electric potential. The write scanner provides a control signal. The drive scanner provides a power-supply voltage changing the electric potential from high to low. The drive scanner drives adjacent power-supply lines as a group. The number of lines as a group is determined in advance. The drive scanner switches a power-supply voltage from high to low and vice versa, and applies the voltage to groups by shifting the phase from group to group. The voltage is supplied to a group at the same phase and switched the electric potential.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: November 26, 2013
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino, Naobumi Toyomura
  • Patent number: 8587501
    Abstract: An electroluminescent display includes a display substrate, a plurality of patterned first electrodes formed over the display substrate, one or more layers of light-emitting material formed over the plurality of first electrodes, at least one second electrode formed over the one or more layers of light-emitting material, and a plurality of chiplets. Each chiplet is electrically connected to a first electrode. Each chiplet further includes a light detector and a light emitter separate from the one-or-more layers of light-emitting material connected to the chiplet circuitry. The chiplet circuitry includes a modulating circuit for modulating light emitted by the light emitter and a demodulating circuit for demodulating light detected by the light detector so that light emitted by the light emitter of a first chiplet is received by the light detector of a second chiplet.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: November 19, 2013
    Assignee: Global OLED Technology LLC
    Inventors: Christopher J. White, Ronald S. Cok, John W. Hamer, Andrew Arnold
  • Patent number: 8554304
    Abstract: An apparatus for providing high resolution images to patients positioned in a magnetic resonance imaging (MRI) device. The MRI device comprises a head coil arranged to surround a patient's head and to provide MRI images thereof, the apparatus comprising units for receiving video or picture image signals from an external source. The apparatus further comprises units for displaying a video or picture image, the display units being arranged in a housing, the housing being suspended in an arm comprising at least two successive members. A joint is between the housing and the adjacent member, a joint or joints are between the successive members, and a joint is between an attachment element for attaching the apparatus to the head coil, or other part of the MRI device, and the member adjacent to the coil attachment element, each being hinged to allow rotation of the joints.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: October 8, 2013
    Assignee: Nordicneurolab AS
    Inventor: Vegard Vangdal
  • Patent number: 8508441
    Abstract: A self-luminescent display device includes a pixel unit in which a plurality of pixels including a self-luminescent pixel is arranged, an external light sensor which measures an external light intensity, a temperature sensor which measures an environmental temperature, an image correcting unit which corrects image data input to the image correcting unit on the basis of statistical data of the image data, a light adjusting unit which produces a light adjusting signal on the basis of a measurement signal of the external light sensor, a temperature control unit which produces a temperature correcting signal on the basis of a measurement signal of the temperature sensor, and a display control unit which produces a brightness correcting signal for correcting light emitting brightness of the pixels in the pixel unit on the basis of the light adjusting signal and the temperature correcting signal.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: August 13, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Fusashi Kimura, Atsunari Tsuda
  • Patent number: 8497885
    Abstract: A display apparatus includes a matrix of light emitting elements, a plurality of drive circuits provided for driving the light emitting elements, a plurality of scanning lines to which a scanning signal is applied to select the drive circuits on a row basis, a plurality of control lines to which a light-emission control signal is applied to determine an emission period of the light emitting elements, and a plurality of data lines to which image signals are applied to define brightness of the light emitting elements on a column basis. The scanning signal is sequentially applied to the scanning lines in a field so that the image signals of the data lines are programmed in the drive circuits, and the light-emission control signal is sequentially applied to the control lines to make the light emitting elements emit light with brightness corresponding to the image signal programmed to the drive circuit.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: July 30, 2013
    Assignee: Canon Kabushiki Karsha
    Inventors: Kouji Ikeda, Kohichi Nakamura, Masami Iseki
  • Patent number: 8497821
    Abstract: A display device, including a substrate; an array of pixels arranged in rows and columns forming a light-emitting area over the substrate, each pixel including a first electrode, one or more layers of light-emitting material located over the first electrode, and a second electrode located over the one or more layers of light-emitting material; a first serial buss having a plurality of electrical conductors, each electrical conductor connecting one chiplet in a first set of chiplets to only one other chiplet in the first set in a serial connection, the chiplets being distributed over the substrate in the light-emitting area, each chiplet including one or more store-and-forward circuits for storing and transferring data connected to its corresponding electrical conductor; and a driver circuit in each chiplet for driving at least one pixel in response to data stored in the store-and-forward circuit.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: July 30, 2013
    Assignee: Global OLED Technology LLC
    Inventor: Ronald S. Cok
  • Patent number: 8477087
    Abstract: A common power line shared by all the pixels allows threshold correction to be performed simultaneously on all the pixels. Video signal lines are set to a second reference potential higher than a reference potential, followed by multi-step threshold correction and video signal writing which are performed in a line sequential manner. Performing the threshold correction immediately before the video signal writing ensures shorter time from the threshold correction to the video signal writing. This suppresses leak currents, providing improved image quality.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: July 2, 2013
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 8471838
    Abstract: A pixel circuit includes: a light emitting element; a driving transistor for applying current to the light emitting element in response to a signal value applied between a gate and a source thereof when a driving voltage is applied between a drain and the source thereof; first and second capacitors connected in series between the gate and the source of the driving transistor; a sampling transistor connected between the gate of the driving transistor and a predetermined signal line; a switching transistor connected to supply a potential of the signal line to a node between the first and second capacitors; and a light detection element connected between the gate of the driving transistor and the node between the first and second capacitors for supplying current of a current amount in accordance with an emitted light amount of the light emitting element.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: June 25, 2013
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 8471752
    Abstract: An A/D conversion apparatus includes an N-stage pulse circulating circuit including N (N is a natural number, N?3) inverting circuits connected in a ring shape, the inverting circuits delaying an input pulse signal by a delay time corresponding to an amplitude of a separately input analog input signal, and outputting inverted pulse signals obtained by inverting the pulse signal, a counter unit that counts a number of circulations by which the pulse signal has circulated in the pulse circulating circuit within a predetermined time based on the inverted pulse signal output from one of the N inverting circuits, and a switching unit that switches an output destination of the inverted pulse signal, which is output from an inverting circuit of an Mth (M is an odd natural number, 1?M?N?1) stage of the pulse circulating circuit, according to a change in an operation environment.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: June 25, 2013
    Assignees: Olympus Corporation, Denso Corporation
    Inventor: Yukie Hashimoto
  • Patent number: 8466854
    Abstract: An organic electro-luminescent device package includes an organic electro-luminescent device array substrate, a transparent cover, and a frit. The organic electro-luminescent device array substrate includes a first substrate and a plurality of organic electro-luminescent devices arranged on the first substrate in an array. The transparent cover is disposed over the organic electro-luminescent device array substrate. The transparent cover includes a second substrate and a conductive layer disposed on the second substrate. The organic electro-luminescent devices are located between the first substrate and the second substrate. The frit is disposed between the organic electro-luminescent device array substrate and the transparent cover to surround the organic electro-luminescent devices. The frit is located between the first substrate and a portion of the conductive layer, and the portion of the conductive layer corresponding to the frit is transparent.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: June 18, 2013
    Assignee: Au Optronics Corporation
    Inventors: Chih-Che Liu, Shih-Feng Hsu
  • Patent number: 8466856
    Abstract: Methods for displaying an image on a color display having a target display white point luminance and chromaticity, and including three gamut-defining emitters defining a display gamut and two or more additional emitters which emit light within the display gamut; the method including receiving a three-component input image signal; transforming the three-component input image signal to a five-or-more component drive signal; and providing the drive signal to display an image corresponding to the input image signal. One method provides a reproduced luminance value higher than the sum of the respective luminance values of the three components of the input signal when reproduced with the gamut-defining emitters. Another method provides reduced power in an OLED display including a white-emitting layer with three color filters for gamut-defining emitters and two or more additional color filters for three additional within-gamut emitters.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: June 18, 2013
    Assignee: Global OLED Technology LLC
    Inventors: John W. Hamer, Michael E. Miller, John Ludwicki