Color Patents (Class 345/88)
  • Patent number: 8605124
    Abstract: A method of illuminating a display includes spatially varying the luminance of a multi-colored light source illuminating a plurality of pixels of the display in response to receiving a plurality of pixel values, and varying the transmittance of a light valve of the display having filters corresponding to the multi-colored light source in response to receiving the plurality of pixel values. The illumination is modified for a plurality of pixel values based upon modification of the luminance of the light source and varying the transmittance of the light valve.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: December 10, 2013
    Assignee: Sharp Laboratories of America, Inc.
    Inventor: Xiao-fan Feng
  • Patent number: 8605127
    Abstract: A method for driving an active matrix organic light emitting diode (AMOLED) display panel is provided. In the present method, how to drive a single pixel having a red sub-pixel, a green sub-pixel, a first blue (light blue) sub-pixel, and a second blue (dark blue) sub-pixel is effectively determined based on the characteristics of the (1931) CIE color space. Besides, at the same time point, only one of the two sub-pixels corresponding to the two blues (i.e. dark blue and light blue) in the single pixel is enabled to be mixed with the red sub-pixel and the green sub-pixel. Accordingly, the luminous efficiency of the AMOLED is improved and the power consumption of the entire AMOLED display is reduced.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: December 10, 2013
    Assignee: Au Optronics Corporation
    Inventors: Hsueh-Yen Yang, Tze-Chien Tsai
  • Patent number: 8605236
    Abstract: An LCD apparatus and method of manufacturing the same is disclosed. The LCD apparatus includes a backlight; a first electrode and a second electrode disposed over the backlight; a liquid crystal layer disposed between the first electrode and the second electrode; and a color filter unit including a first color filter, a second color filter, and a third color filter, disposed over the second electrode, where the first color filter includes a plurality of first regions and a plurality of first connection portions, each first connection portion connecting two adjacent first regions to each other, and the second color filter includes a plurality of second regions and a plurality of second connection portions, each second connection portion connecting two adjacent second regions to each other.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: December 10, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Yoon So, Sang-Woo Park
  • Patent number: 8605018
    Abstract: In a liquid crystal display apparatus, a first control signal bus line receives a first control signal. A second control signal bus line receives a second control signal that lags behind the first control signal. A de-multiplexer circuit includes a first switching element and a second switching element. The first switching element switches a current path between a first source line and a first data line in response to the first control signal, and the second switching element switches a current path between the first source line and a second data line in response to the second control signal. A pixel part includes a first pixel connected to the first control signal bus line and corresponding to a first color filter, a second pixel connected to the second control signal bus line and corresponding to a second color filter, and a third pixel corresponding to a third color filter, wherein the third pixels are alternately connected to the first control signal bus line and the second control signal bus line.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: December 10, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bong-Jun Lee, Jong-Hwan Lee, Yu-Jin Kim
  • Patent number: 8605020
    Abstract: A liquid crystal display device of at least one embodiment of the present invention includes a TN-mode liquid crystal display panel which is constituted by pixels of three colors (red, green, and blue) and a color filter. A thickness of a liquid crystal layer (cell thickness) is determined on a basis of a retardation value of green light or red light, which has a larger wavelength than blue having shortest wavelength among the three colors. A display data switching circuit carries out gradation conversion of shifting input gradation values to lower gradation values with respect to image data supplied to pixels of blue. Thus, grayscale inversion is prevented. The liquid crystal display device of the present invention produces an effect of improving transmittance of pixels of colors having wavelengths other than the wavelength of blue.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: December 10, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaaki Saitoh, Tomoo Furukawa, Kazuyoshi Fujioka
  • Patent number: 8605017
    Abstract: In one embodiment, a display system includes a subpixelated display panel and a backlight array of individually controllable multi-color light emitters. When the display panel comprises a multi-primary subpixel arrangement having a white (clear) subpixel, the backlight control techniques allows the white subpixel to function as a saturated primary display color. In another embodiment, the display system may calculate a set of virtual primaries for a given image and process the image using a novel field sequential control employing the virtual primaries. In another embodiment, a display system comprises a segmented backlight comprising: a plurality of N+M light guides, said light guides forming a N×M intersections; a plurality of N+M individually addressable light emitter units, each of said N+M light emitter unit being associated with and optically connected to one of said N+M light guide respectively.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: December 10, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Candice Hellen Brown Elliott, Michael Francis Higgins
  • Publication number: 20130321495
    Abstract: A liquid crystal display device (1), which is provided with a liquid crystal panel (display unit) (2) and a backlight device (backlight unit) (3), and which displays information by dividing one frame period into four sub-field periods. In the liquid crystal display device (1), a backlight control unit (23) controls a drive for lighting light-emitting diodes (4,4b) in such a manner that a first lighting period for emitting white light and a second lighting period for emitting blue light alternate in two sequential sub-field periods. A panel control unit (display control unit) (22) operates: a red pixel (Pr), a green pixel (Pg) and a transparent pixel (Pt) during the first lighting period; and the transparent pixel (Pt) during the second lighting period.
    Type: Application
    Filed: February 7, 2012
    Publication date: December 5, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Takenori Yoshizawa
  • Patent number: 8599125
    Abstract: A Liquid Crystal Display (LCD), a backlight used for the LCD and a method for producing the LCD and the backlight are provided which are capable of inhibiting an increase in component counts and in assembling processes and of reducing them, thereby achieving low costs. A display image is obtained by arranging a backlight section being able to perform scanning as a single unit in a manner that it positionally matches a liquid crystal displaying section. The backlight section is provided with a plurality of scanning electrodes and light emitting layers each providing a different luminescent color, and being spatially separated from each other on a principal face of the backlight and scanning is performed on a plurality of light emitting layers providing a different luminescent color.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: December 3, 2013
    Assignee: Getner Foundation LLC
    Inventors: Ken Sumiyoshi, Toshihiro Yoshioka, Hiroshi Hayama, Jin Matsushima
  • Patent number: 8593385
    Abstract: Disclosed are a display device and a driving method thereof. The display device includes: a display panel including a plurality of pixels, a plurality of gate lines, and a plurality of data lines; a first gate driver and a second gate driver which each transmit a gate signal to the gate lines and are at edge regions of the display panel; and a data driver which transmit data voltages to the data lines. The pixels include a plurality of first color pixels which display a first color and are connected to the first gate driver, a plurality of second color pixels which display a second color and are connected to the second gate driver, and a plurality of third color pixels which display a third color and comprise at least a pixel connected to the first gate driver and at least a pixel connected to the second gate driver.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: November 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae Hoon Lee, Whee-Won Lee, Duc-Han Cho
  • Publication number: 20130307881
    Abstract: According to various embodiments of the invention, gamma curves for multiple pixel groups can be calibrated using look-up tables or by using reference voltage groups provided by gamma voltage generators so that the pixels can display multiple images with correct gray levels at different view angles. Therefore, color shift can be avoided or lessened without necessarily using extra circuitry on the display panel. Also, any related light transmittance or light utilization efficiency reduction may be decreased or eliminated.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 21, 2013
    Inventor: Ming-Feng Hsieh
  • Patent number: 8587621
    Abstract: Methods and systems for displaying an image on a display, for example, a liquid crystal display (LCD) having more than three different colored filters. The display may include a plurality of sub-pixels, each of the sub-pixels being aligned with a filter having a color selected from a set of more than three different colors, none of which is white. A number of methods and systems for processing data for display are disclosed, for example, using data points from adjacent pixel groups, or data points for different colors within the same pixel data set.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: November 19, 2013
    Assignee: Genoa Color Technologies Ltd.
    Inventors: Doron Malka, Moshe Ben-Chorin
  • Patent number: 8587752
    Abstract: A normally-black active-matrix-type liquid crystal display device comprises a first substrate having color layers of three or more colors and a second substrate on which an active-matrix array is formed. The first substrate has a structure, which is devoid of a black matrix, in which the color layers are stacked in a frame portion surrounding the display area. A first light-shielding layer in which color layers of three of more colors are stacked is formed on the frame portion on a side of the display area from which scanning lines are led out and on a side of the display area from which data lines are led out, from among four sides of the display area. A second light-shielding layer in which color layers of two colors are built up is formed on the frame portion on at least one side of the other remaining sides of the display area.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: November 19, 2013
    Assignee: NLT Technologies, Ltd.
    Inventors: Shinichi Nishida, Sounosuke Takahashi, Takahiko Watanabe, Yoshikazu Sakaguchi, Taku Kawasaki
  • Patent number: 8587504
    Abstract: A liquid crystal display (“LCD”) includes an LCD panel, a data driving unit, and a selection unit. A configuration of the selection unit, which includes a plurality of switching devices driven by a selection control signal to connect a plurality of data lines to each channel of the data driving unit, is adjusted according to the selection control signal, so that charging voltages of the same color pixels of the LCD panel are made the same, whereby no stripe defect appears. In addition, the configuration of the selection unit is adjusted according to the selection control signal and the polarity change of the data signal supplied from the data driving unit, so that color aggregation caused by supplying the same polarity voltage to adjacent color pixels of the LCD panel can be minimized.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 19, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Soong Yong Joo
  • Publication number: 20130300640
    Abstract: A method of determining area size of sub pixels in a multi primary display for maximizing white point luminance level is provided herein. The method includes the following stages: obtaining optical properties of a backlight module and of multi primary filters for a multi primary display; obtaining a white point chromaticity for the sub-pixel layout; obtaining, for each one of the primaries intensity ratio between the color primary and the white point; representing a luminance level of the multi primary display based on obtained data, at the required white point chromaticity, as a set of equations in terms of a relative area size of the sub-pixels of the multi primary display; solving the set of equations, to yield ratios of area sizes of the sub-pixels that result in a specified value of luminance at the white point chromaticity.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 14, 2013
    Inventor: Moshe Ben-Chorin
  • Publication number: 20130300778
    Abstract: According to various embodiments of the invention, gamma curves for multiple pixel groups can be calibrated using look-up tables or by using reference voltage groups provided by gamma voltage generators so that the pixels can display multiple images with correct gray levels at different view angles. Therefore, color shift can be avoided or lessened without necessarily using extra circuitry on the display panel. Also, any related light transmittance or light utilization efficiency reduction may be decreased or eliminated.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 14, 2013
    Inventor: Ming-Feng Hsieh
  • Publication number: 20130300781
    Abstract: In first aspect of the invention, driving methods of gate interlaced scanning for color LCD are disclosed. This interlaced scanning involves powering odd gate lines sequentially first and then powering even gate lines sequentially, which can minimize the voltage polarity swing to reduce power consumption in source output block. In second aspect of the invention, driving methods of FSCLCD having an RGB LED backlight unit scanning with an increased LED lamp turn on time and reduced potential non-uniformity near modular light guid panel are disclosed. Novel driving methods of variabnt sub-color frame periods are also disclosed with various color sub-frames. In third aspect of the invention, a dual common electrode color LCD with a source driver IC block with lower driving voltage and lower power consumption in the display panel is disclosed, wherein each common electrode voltage has opposite voltage phase to reduce the source driving voltage.
    Type: Application
    Filed: May 29, 2013
    Publication date: November 14, 2013
    Inventor: Sang Tae Lee
  • Patent number: 8581815
    Abstract: Disclosed is a display device adapted to selectively display a normal image, a stereoscopic image, a multi-view image and a stereoscopic multi-view image is disclosed. The display device includes a liquid crystal panel displaying an image; a polarizer disposed on the liquid crystal panel; a liquid crystal lens disposed on the polarizer; and a polarizing member interposed between the liquid crystal lens and the liquid crystal panel, wherein an axis of light transmitted through the liquid crystal lens coincides with an optical axis of the polarizer. Accordingly, the display device can selectively display a normal image, a stereoscopic image, a multi-view image and a stereoscopic multi-view image, while improving the picture quality and the brightness.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: November 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hyung Ki Hong, Hee Jin Im
  • Publication number: 20130293595
    Abstract: Disclosed are a liquid crystal display (LCD) device and a method of fabricating the same, the LCD device having a dual link structure for reducing width of a line diverging section where data link wires diverge to come in contact with data lines. A set of data link wires are placed in a first layer and another set of data link wires are placed in a second layer so that the pitch between the data link wires can be reduced.
    Type: Application
    Filed: April 8, 2013
    Publication date: November 7, 2013
    Applicant: LG Display Co., Ltd.
    Inventors: HongSoo KIM, KyeongHwa BEOM
  • Publication number: 20130293498
    Abstract: Disclosed is an LCD device and a method of driving the same. The LCD device includes a liquid crystal panel configured to comprise a TFT substrate and a color filter substrate; a touch panel configured to comprise a plurality of driving electrodes and a plurality of receiving electrodes; a common voltage generator configured to generate a common voltage; a touch sensing unit configured to supply the common voltage to the driving electrodes and sequentially supply a driving voltage to scanned driving electrodes, corresponding to scanned gate lines to which a scan signal has been inputted for one frame period, to detect a touch; and a driving voltage generator configured to generate the driving voltage.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 7, 2013
    Applicant: LG Display Co., Ltd.
    Inventors: CheolSe Kim, HoonBae Kim
  • Publication number: 20130293598
    Abstract: An image display apparatus operates in field sequence mode which effectively reduces the generation of color break. A color break strength calculating unit determines a color break strength that indicates the noticeability of the generation of the color break. A light-source signal generating unit controls each light source so that as the color break strength of a color mixed component having the highest color break strength is higher, the color mixed component is contained more in light output from a light-source unit during the extension subframe period. If there is present a first pixel region as an area including one or more pixel formation regions where an image containing the component of interest is displayed, the color break strength of the component of interest increases more as a magnitude of the component of interest is larger in the first pixel region.
    Type: Application
    Filed: January 16, 2012
    Publication date: November 7, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Tomoyuki Ishihara
  • Patent number: 8576261
    Abstract: A liquid crystal display device (100A) of the present invention includes an active matrix substrate (220); a counter substrate (240); and a vertical alignment type liquid crystal layer (260). The liquid crystal display device (100) has a plurality of pixels, each of the pixels including a plurality of subpixels. The plurality of subpixels include a red subpixel (R), a green subpixel (G), and a blue subpixel (B). When each of adjacent two of the plurality of pixels represents an achromatic color at a certain grayscale level, a luminance of a blue subpixel (B) included in one of the two adjacent pixels is different from a luminance of a blue subpixel (B) included in the other of the two adjacent pixels.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: November 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuichi Yoshida, Kazunari Tomizawa, Tomohiko Mori, Kozo Nakamura, Shun Ueki
  • Patent number: 8576262
    Abstract: A liquid crystal device (100A) according to the present invention has first and second pixels (P1 and P2). Each of the first and second pixels (P1 and P2) includes first, second and third subpixels (R, G, and B). When the input signal indicates that each pixel should represent the first color, the luminances of the respective third subpixels (B1 and B2) of the first and second pixels (P1 and P2) are different from each other. But when the input signal indicates that each pixel should represent the second color, the average luminance of the respective third subpixels (B1 and B2) is substantially the same as when the first color is specified, and the luminances of the respective third subpixels (B1 and B2) are substantially equal to each other.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: November 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Mori, Kazunari Tomizawa, Yuichi Yoshida
  • Patent number: 8576156
    Abstract: An auxiliary capacitor line driving circuit (5), provided in a surrounding region located around a display region (R1) in a liquid crystal display panel, generates auxiliary capacitor driving signals, and includes: first and second voltage trunk lines (VCS1, VCS2) which carry two different voltages, respectively; at least one control signal line (VCTRL1, VCTRL2) carrying one control signal; and a plurality of TFTs (T1, T2, T3, T4) each alternately supplying, to the respective auxiliary capacitor lines (CSn, CSn+1, and the like) in a given cycle, the two different voltages supplied to the auxiliary capacitor line driving circuit (5). Therefore, a liquid crystal display device employing multi-picture element drive method can be provided as a liquid crystal display device that achieves narrowing of a picture frame region as a non-display region and an external circuit board.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: November 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masahiko Nakamizo, Akihiro Shohraku
  • Publication number: 20130286271
    Abstract: A display unit is controlled to increase luminance of a white pixel of a display apparatus in a case where an image capturing apparatus is in an image capturing mode as compared with a case where the image capturing apparatus is in a reproduction mode.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Shinya Ishii
  • Publication number: 20130286058
    Abstract: To suppress deterioration of quality of a still image displayed with a reduced refresh rate. A liquid crystal display device includes a display portion that is controlled by a driver circuit and includes normally white mode (or normally black mode) liquid crystals, and a timing controller for controlling the driver circuit. The timing controller is supplied with an image signal for displaying a moving image and an image signal for displaying a still image. The absolute value of a voltage applied to the liquid crystals in order to express black (or white) in an image corresponding to the image signal for displaying the still image is larger than that of a voltage applied to the liquid crystals in order to express black (or white) in an image corresponding to the image signal for displaying the moving image.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Inventors: Atsushi UMEZAKI, Hiroyuki MIYAKE
  • Publication number: 20130285890
    Abstract: An image processing unit (2 in FIG. 1) discards a high gray level side of input image data (RiGiBi) in accordance with a chroma coefficient (Csc), thereby to generate a signal of lowered chroma, and it expands the signal into output image data (RoGoBo) of full scale. Besides, the image processing unit (2) generates an image adjustment parameter (Th) and performs a control so as to reduce power of backlight (6), in interlocking with the fullscale expansion.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., HITACHI DISPLAYS, LTD.
    Inventors: Norio MAMBA, Naoki TAKADA, Yasuki KUDO, Tsutomu FURUHASHI
  • Patent number: 8570262
    Abstract: A liquid crystal display (LCD) is disclosed. The pixels of the LCD each have storage capacitors, and the capacitances of the storage capacitors of pixels of different colors are different.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: October 29, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Kyu Lee, Dong-Hoon Lee, Chul-Ho Kim
  • Patent number: 8570270
    Abstract: An edge-lit backlight unit for displays is provided. In one embodiment, the backlight may include a light guide configured to receive light from a light source along a first lateral edge. The received light propagates towards a second opposite lateral edge. The backlight unit may include an arrangement of light-extracting elements configured to extract a portion of the propagating light and to allow the remaining portion to reach the second edge. In one embodiment, a specular reflector disposed at the second edge causes the light reaching the second edge to retro-propagate back towards the first edge. In certain embodiments, the retro-propagating light may be between approximately 5 to 35 percent of the total light received by the light guide. The retro-propagating light may be extracted by multiple light-extracting elements and mixed with the extracted propagating light to provide improved color uniformity along an axis of the display.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: October 29, 2013
    Assignee: Apple Inc.
    Inventors: Chenhua You, Shengmin Wang
  • Patent number: 8570351
    Abstract: A liquid crystal display device (100) according to the present invention includes pixels (P1) and (P2), each of which includes three subpixels (R1, G1, B1) and (R2, G2, B2). When the input signal indicates that a chromatic color should be represented, one of the subpixels (B1 and B2) is turned ON and at least one of the subpixels (R1, R2, G1 and G2) is turned ON, too. If the average luminance of the subpixels (B1 and B2) in a situation where the input signal indicates that the chromatic color should be represented is substantially equal to that of the subpixels (B1 and B2) in another situation where the input signal indicates that an achromatic color should be represented, the luminances of those subpixels (B1 and B2) in the former situation are different from those of the subpixels (B1 and B2) in the latter situation.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: October 29, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiko Mori, Kazunari Tomizawa, Yuichi Yoshida
  • Patent number: 8570265
    Abstract: A liquid crystal display includes a first gate line transmitting a first gate signal, a first data line transmitting a first data voltage, and a first pixel connected to the first gate line and the first data line and including a first subpixel and a second subpixel. The first subpixel includes a first switching element connected to the first gate line, a first liquid crystal capacitor connected to the first switching element, and a first storage capacitor having a first terminal and a second terminal. The second subpixel includes a second switching element connected to the first gate line and the first data line, a second liquid crystal capacitor connected to the second switching element, and a second storage capacitor having a first terminal and a second terminal and having a capacitance different from a capacitance of the first storage capacitor.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: October 29, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kwang-Chul Jung, Mee-Hye Jung
  • Publication number: 20130278644
    Abstract: A display control method used in a display with color light sources. Whether a frame is tending to at least one of colors of color lights is determined. When the frame is tending to the at least one of the colors, executing at least one of steps of: (1) adjusting the corresponding color source of the frame to which color the frame is not tending to be weak, dark, or even turned off, and (2) adjusting the corresponding color light source of the frame to which color the frame is tending to be strong or light.
    Type: Application
    Filed: April 18, 2013
    Publication date: October 24, 2013
    Inventor: HUNG-TA LIU
  • Publication number: 20130278652
    Abstract: A display device includes: a panel portion, on which a plurality of sub-pixels with a discrete bus line form each individual pixel, the plurality of sub-pixels that form the individual pixel being sequentially arranged in a horizontal and a vertical direction, the panel portion displaying a two-dimensional image or a three-dimensional image by application of a signal via the bus line; and a filter portion, provided on a front surface of the panel portion, that alternately changes, for each of predetermined horizontal regions, a polarization state of light passing through the panel portion. A boundary of each of the horizontal regions of the filter portion is positioned within a range of a first sub-pixel of each of the plurality of sub-pixels. The first sub-pixel displays a different image when the two-dimensional image is displayed on the panel portion to when the three-dimensional image is displayed on the panel portion.
    Type: Application
    Filed: June 14, 2013
    Publication date: October 24, 2013
    Inventor: Yuji Nakahata
  • Patent number: 8564582
    Abstract: A display device includes a pixel array and a drive unit that drives the pixel array. The pixel array includes first and second scanning lines in rows, signal lines in columns, a matrix of pixels arranged at respective intersections of the scanning lines and the signal lines, power supply lines that supply power to each of the pixels, and ground lines. The drive unit includes a first scanner that sequentially supplies first control signals to the corresponding first scanning lines to perform line-sequential scanning on the pixels on a row-by-row basis, a second scanner that sequentially supplies second control signals to the corresponding second scanning lines in synchronization with the line-sequential scanning, and a signal selector that supplies video signals to the signal lines in synchronization with the line-sequential scanning. Each pixel includes a light-emitting element, a sampling transistor, a drive transistor, a switching transistor, and a pixel capacitor.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: October 22, 2013
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8564517
    Abstract: A displaying method for field sequential color displays using two color fields to produce a full color image is disclosed. The displaying method includes: providing a target full color image, displaying a first color field and displaying a second color field. The target full color image is formed by a first color image optical stimulus, a second color image optical stimulus and a third color image optical stimulus. The first color field displays the first color image optical stimulus and a first part of the third color image optical stimulus, while the second color field displays the second color image optical stimulus and a second part of the third color image optical stimulus, which compensates the shortage of the third color image optical stimulus in the first color field. The target full color image is generated by displaying the first and second color fields in sequence, so as to decrease the displaying frequency of field sequential color displays.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: October 22, 2013
    Assignee: Au Optronics Corporation
    Inventors: Yu-Kuo Cheng, Yi-Pai Huang, Yi-Ru Cheng, Han-Ping D. Shieh
  • Publication number: 20130271356
    Abstract: A signal conversion circuit (20) is used for a multiple-primary color liquid crystal display device (100) which performs color display using four primary colors of red displayed by a red-sub pixel (R), green displayed by green-sub pixel (G), blue displayed by blue-sub pixel (B), and yellow displayed by yellow-sub pixel (Ye), and converts an input three-primary color video signal into a multiple-primary color video signal corresponding to four primary colors. The signal conversion circuit (20) performs signal conversion such that a gray scale level of the yellow-sub pixel (Ye) is higher than a gray scale level of the green-sub pixel (G) in at least some cases from among cases in which a red gray-scale level r, a green gray-scale level g, and a blue gray-scale level b which are displayed by the three-primary color video signal satisfy a relationship of r>g>b.
    Type: Application
    Filed: December 22, 2011
    Publication date: October 17, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yuichi Yoshida, Tomohiko Mori, Kazunari Tomizawa, Kohzoh Nakamura, Shun Ueki
  • Patent number: 8558782
    Abstract: Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode (LED) based backlight. In one embodiment, the backlight may include two or more groups of LEDs, each driven at a respective driving strength. Each group may include LEDs of a different chromaticity, and the respective driving strengths may be adjusted, for example, by varying the duty cycles, to maintain the target white point. To ensure that the white point may be maintained over an operational temperature range of the backlight, the LEDs may be selected so that the chromaticities of each group of LEDs are separated by at least a minimum chromaticity difference. Further, the LEDs may be selected so that at the equilibrium temperature of the backlight, the LEDs may produce the target white point when driven at substantially equal driving strengths.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: October 15, 2013
    Assignee: Apple Inc.
    Inventors: Chenhua You, Jean-Jacques Philippe Drolet, Wei Chen
  • Patent number: 8558857
    Abstract: A color Liquid Crystal display (LCD) device for displaying a color image using at least four different primary colors, the device including an array of Liquid Crystal (LC) elements, driving circuitry adapted to receive an input corresponding to the color image and to selectively activate the LC elements of the LC array to produce an attenuation pattern corresponding to a gray-level representation of the color image, and an array of color sub-pixel filter elements juxtaposed and in registry with the array of LC elements such that each color sub-pixel filter element is in registry with one of the LC elements, wherein the array of color sub-pixel filter elements comprises at least four types of color sub-pixel filter elements, which transmit light of the at least four primary colors, respectively.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: October 15, 2013
    Assignee: Genoa Color Technologies Ltd.
    Inventors: Ilan Ben-David, Shmuel Roth, Moshe Ben-Chorin
  • Patent number: 8558773
    Abstract: 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: Grant
    Filed: February 26, 2013
    Date of Patent: October 15, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Patent number: 8558781
    Abstract: A color sequential control method adapted to a field sequential color display is provided. The field sequential color display includes a display panel and a backlight module. The backlight module provides a backlight source to the display panel, wherein the backlight source includes a red backlight, a green backlight and a blue backlight. The color sequential control method includes following steps. First, a frame period of the display panel is sequentially divided into a first, a second and a third sub-frame periods. Next, a cyan backlight and the red backlight are provided in sequence during a first backlight period of the first sub-frame period. Then, a magenta backlight and the green backlight are provided in sequence during a second backlight period of the second sub-frame period. Finally, a yellow backlight and the blue backlight are provided in sequence during a third backlight period of the third sub-frame period.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: October 15, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chih-Lei Wu, Wen-Chih Tai, Chih-Chun Chang
  • Patent number: 8558771
    Abstract: System and method for dynamically altering a color gamut used in projection display systems. An embodiment comprises determining a dim color from colors used in representing an image, adjusting the dim color to increase an available display time for a non-dim color used to represent the image, adjusting the non-dim color using the available display time, and generating a color sequence based on the adjusted dim color and the adjusted non-dim color. The pixel intensities of a dim color are increased, permitting a shortening of the display time of the dim color. The newly freed display time can be reallocated to all colors to increase the amount of light used to display the image, thereby increasing image brightness or altering color point.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: October 15, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Todd Alan Clatanoff, Gregory S. Pettitt
  • Patent number: 8553051
    Abstract: A liquid crystal display (LCD) includes an LCD panel, a scan driver, a timing controller and a data driver. The LCD panel includes first and second pixel rows. The timing controller determines a correction voltage index according to an absolute difference between an average of original pixel voltages corresponding to original pixel data of all pixels of the first pixel row, and an average of original pixel voltages corresponding to original pixel data of all pixels of the second pixel row, determines a correction voltage according to the correction voltage index, determines an adjusted pixel voltage in a target pixel according to an original pixel voltage of the target pixel in the second pixel row and the correction voltage, and outputs adjusted pixel data corresponding to the adjusted pixel voltage. The data driver outputs the adjusted pixel voltage to the target pixel according to the adjusted pixel data.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: October 8, 2013
    Assignee: Chimei Innolux Corporation
    Inventors: Yu-Yeh Chen, Feng-Sheng Lin, Chin-Cheng Tsai, Fu-Chi Yang, Chia-Hang Lee, Ming-Chia Shih
  • Publication number: 20130257926
    Abstract: The present invention provides a display method for a stereoscopic display device. First, a frame formed by a left-eye frame with a first color and a right-eye frame with a second color different from the first color is generated with a liquid crystal panel. A first light source emitting a first light beam of the first color and a second light source emitting a second light beam of the second color of the stereoscopic display device are turned on. The first light beam and the second light beam are guided separately toward the liquid crystal panel with the directional light guide plate. When the liquid crystal panel generates the frame, the first light beam and the second light beam penetrate the liquid crystal panel separately, and the left-eye frame and the right-eye frame are displayed at a first view angle and a second view angle respectively.
    Type: Application
    Filed: January 15, 2013
    Publication date: October 3, 2013
    Applicant: HANNSTAR DISPLAY CORP.
    Inventors: Chih-Hsuan Lee, Chun-Chin Tseng
  • Publication number: 20130257889
    Abstract: The present invention discloses a method and apparatus for color conversion based on LCH color space. The method includes: converting source plane Hn, Hn?1 to target plane Hn?, Hn?1?; computing Hx between Hn and Hn?1; computing Hx? between Hn? and Hn?1? and at the same hue level as t Hx; computing conversion matrix Hn and Hn?; computing target color converted from color of any point of Hx and completing space color of target color. Through this method, it is possible to make the color performance closer to the actual object color or closer to expected effect than the actual object color.
    Type: Application
    Filed: April 12, 2012
    Publication date: October 3, 2013
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD.
    Inventor: Chih-tsung Kang
  • Patent number: 8547506
    Abstract: A color filter substrate including a substrate, a black matrix layer and a color filter substrate layer is provided. The substrate has a plurality of grooves. The black matrix layer is disposed on the substrate between each two adjacent grooves, wherein the black matrix layer extends to the region above the groove from the edge of the groove and an undercut profile forms between the bottom of black matrix and the substrate. The color filter layer including a plurality of filter films separated is filled in the plurality of grooves and the plurality of filter films is separated from each other by the black matrix layer. In addition, a method of fabricating a color filter substrate is also provided. The above-mentioned color filter substrate and the fabricating method thereof can improve the quality and color uniformity of the color filter substrate.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: October 1, 2013
    Assignee: Au Optronics Corporation
    Inventors: Chun-Chieh Tsao, Su-Chin Lee
  • Publication number: 20130249779
    Abstract: A display device includes: an update area detecting unit that detects a rewritten area on the basis of first image data previously transmitted and second image data newly transmitted and that sends out only a part of the second image data in the rewritten area to a display panel which includes a memory that stores image data or a cell having a memory effect in each pixel.
    Type: Application
    Filed: January 28, 2013
    Publication date: September 26, 2013
    Applicant: JAPAN DISPLAY WEST INC.
    Inventors: Tsutomu Harada, Soichiro Kurokawa, Takayuki Nakanishi, Naoyuki Takasaki
  • Publication number: 20130249780
    Abstract: It is an object of the present invention to correct brightness irregularities of color lights. A projection display apparatus includes a light source that emits light, DMs that divide the light emitted from the light source into a plurality of color lights, LCDs associated respectively with the color lights separated by the separating means, for modulating the color lights depending on an image signal, an XDP that combines the color lights modulated respectively by the LCDs, and a projection lens that projects light combined by the XDP. The projection display apparatus holds correction values for correcting brightness irregularities of the color lights which are caused by the prism.
    Type: Application
    Filed: January 1, 2011
    Publication date: September 26, 2013
    Inventors: Kenji Ishida, Tsutomu Katou, Tooru Kataoka
  • Patent number: 8542067
    Abstract: Disclosed is an oscillation circuit. The oscillation circuit supplies predetermined oscillation signals to a generating circuit having a divider, a phase comparator, and a generator. A clock signal generating section generates clock signals in a cycle based on the comparison results from the phase comparator. A clock signal mask section masks a part of the clock signals generated by the clock signal generating section to generate the predetermined oscillation signals and supplies the predetermined oscillation signals to the divider. The clock signal mask section masks a part of the clock signals such that the cycle of sampling signals generated by the generator is the same as a predetermined cycle which is the cycle of a clock for use in generating image signals.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: September 24, 2013
    Assignee: Fujitsu Ten Limited
    Inventors: Satoru Uehara, Keiji Furukawa
  • Patent number: 8542171
    Abstract: A driving method applied to a liquid crystal display. First, a first pixel voltage is outputted to a first pixel in a first row of pixels to change a transmittance of the first pixel. Next, a second pixel voltage is outputted to a second pixel in a second row of pixels to change a transmittance of the second pixel. Then, a backlight module is turned on. Next, at a first predetermined time point after the first pixel voltage is outputted, a pixel electrode voltage of the first pixel is adjusted. Finally, at a second predetermined time point after the second pixel voltage is outputted, a pixel electrode voltage of the second pixel is adjusted. The second predetermined time point follows the first predetermined time point.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: September 24, 2013
    Assignee: AU Optronics Corp.
    Inventors: Hsueh-Ying Huang, Ming-Sheng Lai, Min-Feng Chiang
  • Publication number: 20130241963
    Abstract: A display panel driver includes a color reducing circuit and a driving section. The driving section is configured to drive a first pixel and a second pixel. If a second input image data and a third input image data corresponding to the second pixel are supplied as an image data of a second image display format, then the color reducing circuit generates a third color reduction image data and a fourth color reduction image data. If the first input image data is supplied as the image data of the first image display format, then the first selector selects the third error value, and if the second input image data and the third input image data are supplied as the image data of the second image display format, then the first selector selects the second error value.
    Type: Application
    Filed: September 14, 2012
    Publication date: September 19, 2013
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Takahashi Nose, Hirobumi Furihata, Yoshihiko Hori, Hiroshi Tsuchi
  • Publication number: 20130241958
    Abstract: Systems, methods, and devices for column inversion are provided. In one example, an electronic display may include a display panel having columns of pixels and display driver circuitry. The display driver circuitry may include source amplifiers and demultiplexers. Each demultiplexer may channel data output by at least one source amplifier to one of three columns of pixels. The display driver circuitry may drive the display panel according to a 3-column inversion scheme using one source amplifier per demultiplexer per frame of image data.
    Type: Application
    Filed: March 14, 2012
    Publication date: September 19, 2013
    Applicant: APPLE INC.
    Inventors: Hopil Bae, Zhibing Ge, Shih Chang Chang, Cheng Chen, Ming Xu, Shawn Robert Gettemy, Wei H. Yao