Color Patents (Class 345/88)
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Patent number: 12260825Abstract: The disclosure provides a driving device for a self-luminous display panel and an operation method thereof. The driving device includes multiple GAMMA voltage circuits, a group of driving channels, and a routing circuit. Each driving channel is coupled to the corresponding GAMMA voltage circuit to receive a corresponding group of GAMMA voltages. Each driving channel converts corresponding sub-pixel data into a corresponding gray scale voltage based on the corresponding group of GAMMA voltages. The routing circuit is coupled to the output terminals of the driving channels. The routing circuit dynamically changes the coupling relationship between the driving channels and multiple data lines of the self-luminous display panel during different scanning periods.Type: GrantFiled: September 24, 2023Date of Patent: March 25, 2025Assignee: Novatek Microelectronics Corp.Inventors: Yi-Shen Cheng, Che Wei Hsu
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Patent number: 12254823Abstract: A display device includes: a display that displays an image based on image data; a backlight device that irradiates the display with light; an image determiner that determines, based on the image data, whether the image includes a target image having a contrast higher than a reference contrast; and a luminance value setter that sets each luminance value of the image based on the image data, wherein when the image determiner determines that the image includes the target image, the luminance value setter changes the luminance value set for at least one of two or more areas in the target image to reduce a difference between the luminance values of the two or more areas in the target image set based on the image data.Type: GrantFiled: December 4, 2023Date of Patent: March 18, 2025Assignee: SHARP KABUSHIKI KAISHAInventor: Hiroto Suzuki
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Patent number: 12243497Abstract: A display module and a driving method thereof, and a display device are provided. The display module includes a backlight structure including a plurality of backlight partitions. The display module includes a first display mode and a second display mode. Resolution of the display module in the first display mode is greater than the resolution of the display module in the second display mode. In the first display mode, a quantity of the plurality of backlight partitions of the backlight structure is n1, and an area of one of the plurality of backlight partitions of the backlight structure is S1. In the second display mode, the quantity of the plurality of backlight partitions of the backlight structure is n2, and the area of one of the plurality of backlight partitions of the backlight structure is S2, with n1>n2, and S1<S2.Type: GrantFiled: March 8, 2023Date of Patent: March 4, 2025Assignee: Xiamen Tianma Micro-Electronics Co., Ltd.Inventors: Jian Liu, Liu Wang, Zhijie Wang, Shumao Wu, Wei Wu, Guochang Lai
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Patent number: 12222618Abstract: The present application discloses a liquid crystal display panel, a driving method thereof, and a display device. The liquid crystal display panel includes a pixel structure, which includes a plurality of sub-pixels arranged in a matrix; data lines and scan lines arranged perpendicularly cross each other, wherein each of the sub-pixel groups includes two of the sub-pixels of same color; a first driving unit electrically connected to the scan lines, wherein the first driving unit inputs scan signals to the scan lines in a preset sequence, the sub-pixel groups of the pixel modules sequentially obtain the scan signals, two of the sub-pixels in each of the sub-pixel groups obtain the scan signals at a same time, and two of the sub-pixels in a same one of the sub-pixel groups obtain the scan signals at a same time.Type: GrantFiled: December 9, 2021Date of Patent: February 11, 2025Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Yoonsung Um, Ji Li, Lixia Li, Yingchun Zhao, Qi Zhang, Fen Long, Ce Liang
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Patent number: 12217724Abstract: A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.Type: GrantFiled: December 18, 2023Date of Patent: February 4, 2025Assignee: Dolby Laboratories Licensing CorporationInventors: Jon Scott Miller, Scott Daly, Mahdi Nezamabadi, Robin Atkins
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Patent number: 12217643Abstract: A display device includes: a display panel including a first region having a first pixel structure and a second region having a second pixel structure different from the first pixel structure, and a display panel driver configured to render first region data corresponding to the first region among input image data to generate rendering data in an inactive period of a data enable signal, and to generate data voltages applied to the first region based on the rendering data in an active period of the data enable signal.Type: GrantFiled: December 6, 2022Date of Patent: February 4, 2025Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Inbok Song
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Patent number: 12205932Abstract: A display device includes a blue sub-pixel including a plurality of first light emitting units in a number of N1, a green sub-pixel including a plurality of second light emitting units in a number of N2, and a red sub-pixel including a plurality of third light emitting units in a number of N3. The first light emitting units, the second light emitting units and the third light emitting units all emit lights of blue color, and a green wavelength conversion layer and a red wavelength conversion layer are so arranged that the blue light from the second light emitting units and the blue light from the third light emitting units go through the green wavelength conversion layer and the red wavelength conversion layer respectively. N1 is greater than or equal to 6. N1<N2 and N1<N3, wherein N2/N1 is between 2.1 and 3.68, and N3/N1 is between 1.52 and 2.53.Type: GrantFiled: November 5, 2023Date of Patent: January 21, 2025Assignee: InnoLux CorporationInventors: Jia-Yuan Chen, Tsung-Han Tsai, Kuan-Feng Lee
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Patent number: 12205554Abstract: A liquid crystal display apparatus has a three-TFT structure in which each of pixels includes a first liquid crystal capacitor including a first pixel electrode, a second liquid crystal capacitor including a second pixel electrode, a first TFT including a drain electrode connected to the first pixel electrode, a second TFT including a drain electrode connected to the second pixel electrode, and a buffer capacitor including a buffer capacitor electrode connected to the second pixel electrode via a third TFT. In the liquid crystal display apparatus, a configuration is adopted in which a gate scanning signal is independently supplied to a plurality of gate bus lines one by one, and a sub-gate-on pulse is substantially simultaneously applied to the third TFTs belonging to at least two pixel rows.Type: GrantFiled: April 8, 2024Date of Patent: January 21, 2025Assignee: Sharp Display Technology CorporationInventor: Yoshihisa Takahashi
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Patent number: 12205511Abstract: The present application provides a display panel, a driving method thereof, and an electronic device, wherein the electronic device includes the display panel, and the driving method of the display panel is used to drive the display panel, a driving unit of the display panel drives first sub-pixels and second sub-pixels to display alternately with a first display gray scale and a second display gray scale, and drives third sub-pixels to display with a third gray scale value, so as to alleviate a problem of serious color shift at large viewing angles and improve clarity of a displayed picture.Type: GrantFiled: August 23, 2021Date of Patent: January 21, 2025Assignee: TCL China Star Optoelectronics Technology Co., Ltd.Inventor: Jhenwei He
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Patent number: 12159564Abstract: The present application provides a pixel circuit and a display panel. The pixel circuit includes a light-emitting element, a driving circuit, a grayscale adjustment circuit, and a control circuit. The driving circuit can provide a corresponding power supply voltage for the light-emitting element, and the control circuit can control at least one of at least two grayscale adjustment branches to be in a conductive state.Type: GrantFiled: February 24, 2022Date of Patent: December 3, 2024Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Weifeng Chen
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Patent number: 12131710Abstract: A backlight driving method is provided. The method includes: determining a first duration of a first active pulse phase in a backlight driving signal corresponding to a target frame of a to-be displayed picture in a display panel, based on a target duty ratio and a first period corresponding to a target previous frame; wherein the target previous frame is a frame preceding the target frame, and the backlight driving signal is configured to drive a backlight of the display panel; and determining a second duration based on a maximum period corresponding to a frame at a lowest refresh frequency of the display panel and the first period, to delay a start time of the first active pulse phase based on the second duration.Type: GrantFiled: April 27, 2023Date of Patent: October 29, 2024Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Xinhong Chen, Yun Zhang, Ling Xu
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Patent number: 12130761Abstract: Systems and methods for bus clock line handover are disclosed. In one aspect, a clock line in a bus is driven continuously during bus handover without having contentious or contradictory drive signals being provided. After arbitration, an original bus master will drive the clock line to a predetermined value until detecting a state change on a data line. An incoming bus master will begin driving the clock line to the predetermined value and then drive a state change on the data line. This state change is the state change detected by the original bus master that causes the original bus master to stop driving the clock line.Type: GrantFiled: February 8, 2023Date of Patent: October 29, 2024Assignee: QUALCOMM IncorporatedInventors: Christopher Kong Yee Chun, John Fletcher, Sriharsha Chakka, Navdeep Mer, Sreenivasan Jouly Jothiram
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Patent number: 12131682Abstract: A display panel driving method, a driving apparatus, and a display apparatus are provided. The method includes: determining an over driving voltage according to a first display gray scale and second display gray scale, the first display gray scale a display gray scale of a target pixel cell in a current frame, the second display gray scale a display gray scale of the target pixel cell in a previous frame; determining a pre-charging gray scale according to the second display gray scale and a third display gray scale, the third display gray scale a display gray scale of a row above the target pixel cell in the current frame; determining a target gray scale according to the over driving gray scale and pre-charging gray scale; determining a target driving voltage according to the target gray scale, and driving the target pixel cell based on the target driving voltage.Type: GrantFiled: December 23, 2021Date of Patent: October 29, 2024Assignee: HKC CORPORATION LIMITEDInventors: Yuanping Zhang, Haijiang Yuan
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Patent number: 12124123Abstract: According to one embodiment, a display device includes a liquid crystal display substrate and a color separation element substrate. The display substrate has a stripe structure in which different color filters are alternately arranged in a display area along a first direction and the same color filters are arranged along a second direction orthogonal to the first direction, and the different color filters are compartmentalized by frames along the first direction and the second direction. The element substrate has color separation grooves formed along the first direction in the display area, and grooves formed along the second direction in a region thereof where the color separation grooves are formed, so as to oppose the frame of the display substrate.Type: GrantFiled: March 28, 2023Date of Patent: October 22, 2024Assignee: Japan Display Inc.Inventors: Shuichi Osawa, Yoshikatsu Imazeki, Yoichi Kamijo, Koichi Miyasaka, Yoshifumi Kamei
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Patent number: 12112695Abstract: A light-emitting display system and methods are provided. The light-emitting display includes a processor and a display having a plurality of light-emitting elements (LEEs). The LEEs comprise at least three basic primary colors, and at least one additional primary color. For at least part of the display system, one of the at least three basic primary colors is replaced by said at least one additional primary color, or said at least one additional primary color is added to and/or in between said at least three basic primary colors. And the processor is configured to perform at least one mathematical operation for adjusting color balance of said LEEs.Type: GrantFiled: December 19, 2023Date of Patent: October 8, 2024Assignee: STEREYO BVInventors: Robbie Thielemans, Vince Dundee
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Patent number: 12112712Abstract: A backlight driving board includes a main circuit board, and a photosensitive device, a backlight controller and a first port that are disposed on the main circuit board. The photosensitive device is configured to sense brightness and color temperature of a light source, and output brightness data and color temperature data. The backlight controller is coupled to the photosensitive device, and configured to receive the brightness data and adjust light-emitting brightness of the light source according to the brightness data. The first port is coupled to the photosensitive device, and configured to be coupled to a system board, receive the color temperature data, and transmit the color temperature data to the system board, such that the system board adjusts color temperature of a picture displayed by a display panel according to the color temperature data.Type: GrantFiled: April 8, 2021Date of Patent: October 8, 2024Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Lijin Zhao, Yu Zhang, Shixin Geng, Guangyun Tong, Zhuolong Li, Miao Liu, Huiyan Li, Fan Yang
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Patent number: 12080237Abstract: A display system includes a display unit that displays pixels with a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and a correction circuit that sets a color temperature for white luminescence. When the pixels perform display in a first tone that is the same tone with the red sub-pixel, green sub-pixel, and blue sub-pixel, the correction circuit sets a first color temperature as a white point. When the pixels perform display in a second tone that is lower than the first tone and that is the same tone with the red sub-pixel, green sub-pixel, and blue sub-pixel, the correction circuit sets a second color temperature different from the first color temperature as the white point.Type: GrantFiled: March 28, 2023Date of Patent: September 3, 2024Assignee: SEIKO EPSON CORPORATIONInventor: Jun Irobe
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Patent number: 12066330Abstract: One or more display color characteristics of an electronic device are managed using a light detecting sensor configured to output multiple color channels in a predefined color space. The light detecting sensor in the electronic device senses ambient light and outputs measurements in visible color channels of the predefined color space to characterize the sensed ambient light. A ratio of one or more measurements of one of the visible color channels to one or more measurements of another of the visible color channels is determined. At least one light source generating at least a portion of the sensed ambient light is classified based at least in part on the determined ratio, wherein the determined ratio indicates a color temperature component of the sensed ambient light. The one or more display color characteristics of the electronic device are adjusted based at least in part on the classifying operation.Type: GrantFiled: March 28, 2022Date of Patent: August 20, 2024Assignee: Microsoft Technology Licensing, LLCInventors: Eliyahu Barel, Arthur Gershfeld
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Patent number: 12057531Abstract: A display device having high light-extraction efficiency is provided. A low-power display device is provided. In a red or green pixel included in the display device, a light-emitting element, an optically functional layer, and a wavelength-conversion layer are stacked in this order. The light-emitting element emits blue light, the optically functional layer transmits the blue light and reflects red and green light, and the wavelength-conversion layer converts the blue light into red or green light. The blue light emitted by the light-emitting element passes through the optically functional layer and enters the wavelength-conversion layer, and red or green light is emitted to the outside. The red or green light emitted from the wavelength-conversion layer to the optically functional layer side is reflected by the optically functional layer and emitted to the outside, which improves light-extraction efficiency.Type: GrantFiled: April 7, 2023Date of Patent: August 6, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomoya Aoyama, Koji Kusunoki, Kensuke Yoshizumi
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Patent number: 12055814Abstract: A display panel and a display apparatus are described. In an embodiment, the display panel includes a substrate and a sub-pixel group located at a side of the substrate. In an embodiment, the sub-pixel group includes sub-pixels of at least two different colors and a light-limiting structure. In an embodiment, the sub-pixels share one light-emitting element. In an embodiment, along a direction perpendicular to the substrate, the light-limiting structure overlaps with the light-emitting element and is located at a light exit side of the light-emitting element. In an embodiment, when the display panel displays an image, the sub-pixels in the sub-pixel group are enabled in sequence. In an embodiment, the when one of the sub-pixels is enabled, the light-limiting structure causes light emitted by the light-emitting element to exit only from the enabled sub-pixel.Type: GrantFiled: September 8, 2023Date of Patent: August 6, 2024Assignee: Xiamen Tianma Micro-Electronics Co., Ltd.Inventor: Ling Wu
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Patent number: 12058278Abstract: Various embodiments of the present invention relate to an electronic device including a liquid crystal, the electronic device including: a piece of glass; a display disposed under a first region of the piece of glass; a power supplying module; one or more electrode films; and one or more liquid crystal layers disposed between the one or more electrode films. The electronic device may also include: a light reflection member (e.g., cholesteric liquid crystal) disposed under a second region of the piece of glass; a processor operatively connected to the display, the power supplying module, and the light reflection member; and a memory operatively connected to the processor. The processor can check the content to be displayed through the display, and can use the power supplying module to supply power to the light reflection member on the basis of at least the checked content, so that the one or more liquid crystal layers reflects at least a portion of light incident from the outside of the electronic device.Type: GrantFiled: August 27, 2019Date of Patent: August 6, 2024Assignee: Samsung Electronics Co., Ltd.Inventors: Jeonggyu Jo, Bokyung Sim
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Patent number: 12033596Abstract: The present disclosure provides a display device and a display method thereof. When a change of a grayscale data of a sub-pixel between a current frame and a previous frame, and a change of a polarity of a data voltage of the sub-pixel between the current frame and the previous frame satisfy a compensation condition, the grayscale data of the sub-pixel in the current frame is compensated.Type: GrantFiled: June 25, 2021Date of Patent: July 9, 2024Assignees: Huizhou China Star Optoelectronics Display Co., Ltd., TCL China Star Optoelectronics Technology Co., Ltd.Inventor: Yonglei Zhang
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Patent number: 12021088Abstract: An array substrate, a display device and a driving method thereof are provided. The array substrate includes a plurality of sub-pixels arranged in an array in a first direction and a second direction; and a plurality of gate lines and a plurality of data lines. The plurality of data lines include first data lines and second data lines alternately arranged in the first direction, two columns of sub-pixels arranged in the second direction are arranged between a first data line and a second data line, and the first data line and the second data line are respectively configured to transmit data signals of different polarities. Two adjacent sub-pixels arranged in the first direction are respectively connected to the first data line and the second data line, and two adjacent sub-pixels arranged in the second direction are respectively connected to the first data line and the second data line.Type: GrantFiled: August 6, 2020Date of Patent: June 25, 2024Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Haoliang Ji, Wenjun Xiao, Shijun Wang, Zhiying Bao, Wenkai Mu, Bingqing Yang, Xiaoxiao Chen
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Patent number: 12020647Abstract: A display device is provided with: a display portion including a plurality of scanning lines, a plurality of data lines, and a plurality of pixel circuits; a scanning line drive circuit; and a data line drive circuit. The level of a data voltage applied to the data line decreases when a frame frequency is switched higher, and increases when the frame frequency is switched lower. This can prevent a display flicker when the frame frequency is switched. The level of the data voltage may change when the frame frequency is switched, and may return to its initial level over a plurality of frame periods. The timing of the control signal used to drive the display portion may change in accordance with the frame frequency to cause the length of the charging period of the pixel circuit to change in accordance with the frame frequency.Type: GrantFiled: January 13, 2021Date of Patent: June 25, 2024Assignee: SHARP KABUSHIKI KAISHAInventors: Kazuo Nakamura, Noriyuki Tanaka, Masaaki Nishio, Yousuke Nakamura, Tatsuhiko Suyama
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Patent number: 12014695Abstract: A display driving method, a display driving device and a display device are provided. The display driving method includes: when displaying an odd-numbered frame, providing first parity row data of the odd-numbered frame to a display array, to enable a third parity row of the display array to be displayed based on real data of the first parity row data and enable a fourth parity row of the display array to be displayed based on interpolation data of the first parity row data; and when displaying an even-numbered frame, providing second parity row data of the even-numbered frame to the display array, to enable the fourth parity row of the display array to be displayed based on real data of the second parity row data and enable the third parity row of the display array to be displayed based on interpolation data of the second parity row data.Type: GrantFiled: April 9, 2021Date of Patent: June 18, 2024Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Dongchuan Chen, Yanping Liao, Yingmeng Miao, Yinlong Zhang, Shulin Yao, Xibin Shao, Seungmin Lee, Jiantao Liu
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Patent number: 12001105Abstract: A method for the making of a plurality of LCD screens starting with an oversize panel. The panels laid out on the mother glass include a plurality of screen layouts with trace lead-outs around all four sides of a rectangular panel layout. A panel is then made which has conductor traces around the periphery of the panel. The conductor traces may conductor pads on the panel. The panels are then able to be cut into up to four separate final screen panels depending upon the size requirements of the application. Each of the cut final screen panels will have trace contacts along adjacent edges to allow for coupling to flex connectors. As some panels will be left-right images of each other with regard to pixel colors, drivers for the panels will be adapted for RBG to GBR conversion to drive mirror image panels with the same images.Type: GrantFiled: April 10, 2020Date of Patent: June 4, 2024Inventor: Declan Paul O'Connor
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Patent number: 11990104Abstract: An input signal correction device for reducing power consumption is compatible with a variety of display panels, and includes an input circuit, extension/degeneration circuit, separation/recovery circuit and delay adjustment circuit operating at frequency f, demura circuit operating at frequency f/2, and adder circuit.Type: GrantFiled: February 25, 2021Date of Patent: May 21, 2024Assignee: IIX INC.Inventors: Makoto Hatakenaka, Takashi Sakamoto, Yoshihide Minegishi, Ryohei Hatta, Norimasa Senda
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Patent number: 11988922Abstract: Embodiments of a display device are described. A display device includes a backlight unit having a light source and a liquid crystal display (LCD) module. The LCD module includes a nanostructure-based color conversion (NS-based CC) layer and a light extraction layer. The NS-based CC layer is configured to receive a primary light, from the light source, having a first peak wavelength and to convert a portion of the primary light to emit a first portion of a secondary light having a second peak wavelength. The second peak wavelength is different from the first peak wavelength. The light extraction layer is optically coupled to the NS-based CC layer and is configured to prevent total internal reflection of a second portion of the secondary light. The light extraction layer has patterned features with one or more dimension in nanometer scale.Type: GrantFiled: May 7, 2020Date of Patent: May 21, 2024Assignee: SHOEI CHEMICAL INC.Inventors: Ernest C. Lee, David Olmeijer, Charles Hotz, Ruiqing Ma, Jason Hartlove
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Patent number: 11972713Abstract: An electronic device may display image content via an electronic display by controlling light emission from display pixels of the electronic display. A processor of the electronic device may receive image data destined for a defective display pixel (e.g., dim pixel, dead pixel). The processor may convert a gray level of the image data into a luminance domain to generate a target luminance that would have been emitted by the defective display pixel had the display pixel not been defective. After selecting a compensation mask, the processor may distribute the target luminance of the defective display pixels to nearby non-defective pixels of the electronic display to conceal the presence of the defective display pixel.Type: GrantFiled: April 6, 2022Date of Patent: April 30, 2024Assignee: Apple Inc.Inventors: Hari P. Paudel, Chaohao Wang, Hopil Bae, Mahdi Farrokh Baroughi, Wei Chen, Wei H. Yao
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Patent number: 11955048Abstract: A display device includes a display panel and a panel driving block that controls driving of the display panel. The panel driving block includes a dithering judgment block, a memory, and a dithering compensation block. The dithering judgment block determines whether a first sub-image signal corresponding to a first image requiring dithering is included in the input image signal. The dithering compensation block reads out dithering patterns, which correspond to the first sub-image signal, from among the plurality of dithering patterns from the memory, generates a compensation dithering pattern by the read dithering patterns and a random number table, and outputs a correction image signal through the first sub-image signal and the compensation dithering pattern. The first image is displayed in a stain area, and the stain area includes at least one unit area.Type: GrantFiled: January 23, 2023Date of Patent: April 9, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Wonwoo Jang
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Patent number: 11955043Abstract: An apparatus for performing subpixel rendering of an RGBW display panel is provided. The apparatus receives an input gray level data to acquire a luminance value of each subpixel of a RGB pixel set including two RGB pixels adjacent to each other. The apparatus calculates a rendered luminance value of each subpixel of a display pixel set including two display pixels adjacent to each other according to the luminance values. The display pixel set of the RGBW display panel includes red, green, blue, and white subpixels. The rendered luminance value of the white subpixel of one of the display pixels is determined according to the saturation value of the corresponding RGB pixel and the luminance value of each subpixel of the corresponding RGB pixel. The apparatus acquires a gray level value of each white subpixel of the display pixel set according to the rendered luminance values.Type: GrantFiled: September 21, 2022Date of Patent: April 9, 2024Assignee: HIMAX TECHNOLOGIES LIMITEDInventor: Tung Ying Wu
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Patent number: 11922895Abstract: A liquid crystal display panel, a driving method, and a terminal thereof are disclosed. The display panel includes a pixel structure including data lines and scan lines, wherein each data line is connected to at least two pixel groups, and each pixel group includes three sub-pixels having different colors sequentially connected to the data lines; and a first driving unit electrically connected to the scan lines and inputting scan signals to the scan lines in a preset order to solve a problem of horizontal bright and dark lines.Type: GrantFiled: November 5, 2021Date of Patent: March 5, 2024Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.Inventors: Yoonsung Um, Lixia Li, Bangyin Peng, Yingchun Zhao, Fen Long, Qiqi Zhang
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Patent number: 11915642Abstract: A display device includes: a display unit, a first logic control unit and a light emitting driving unit. The first logic control unit is configured to receive image display data for instructing the display unit to display a static image in a local area, if it is determined that the local area maintains displaying the static image beyond a first threshold duration, then preset replacement display data and the image display data are alternately transmitted to the light-emitting driving unit, where a transmission frequency of the replacement display data is a preset maintenance frequency, and the replacement display data is used to enable the display unit to display a replacement color image in the local area; and the light-emitting driving unit is configured to respond to the data received from the first logic control unit and control the display unit to display the static image or the replacement color image.Type: GrantFiled: October 29, 2021Date of Patent: February 27, 2024Assignee: Yungu (Gu'an) Technology Co., Ltd.Inventor: Zheng Li
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Patent number: 11887526Abstract: A circuit device includes: a color reduction circuit configured to execute color reduction processing from input image data in which pixel data is m bits to color-reduced image data in which pixel data is n bits, and configured to apply spatial error diffusion or temporal error diffusion in the color reduction processing; a storage circuit storing the color-reduced image data; and an image conversion circuit configured to execute image conversion processing, which is at least one of mapping processing and scaling processing, on the color-reduced image data stored in the storage circuit to output output image data, and configured to execute interpolation processing, which is in the image conversion processing, of generating pixel data of the output image data from a plurality of pieces of pixel data of the color-reduced image data.Type: GrantFiled: December 22, 2022Date of Patent: January 30, 2024Inventor: Yasutoshi Akiba
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Patent number: 11862119Abstract: According to an aspect, a display device includes a display panel configured to display an image; and a light source configured to emit light to the display panel. The light source includes a first light source configured to emit light in a first primary color, a second light source configured to emit light in a second primary color, and a third light source configured to emit light in a third primary color. A frame period that is a display period of one frame image includes a predetermined number of subframe periods, the predetermined number is four or greater, and color reproduction of the one frame image is performed by a combination of colors that are output in the predetermined number of subframe periods. An output order of colors of the subframe periods is an order of colors in a clockwise direction or in a counterclockwise direction in a hue circle.Type: GrantFiled: October 6, 2021Date of Patent: January 2, 2024Assignee: Japan Display Inc.Inventor: Tomoyuki Ishihara
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Patent number: 11837154Abstract: A driving device, an operation method thereof, and a display apparatus are disclosed. The driving device is configured to drive a display panel. The driving device divides an image frame period into a plurality of sub-frame periods. A target pixel circuit in the display panel corresponds to target pixel data comprising at least one bit. Each bit in the target pixel data corresponds to at least one corresponding sub-frame period among the sub-frame periods. Different bits in the target pixel data correspond to different sub-frame periods among the sub-frame periods. According to a current bit in the target pixel data, the driving device determines whether to light up the target pixel circuit during the at least one corresponding sub-frame period corresponding to the current bit.Type: GrantFiled: April 19, 2022Date of Patent: December 5, 2023Assignee: Novatek Microelectronics Corp.Inventor: Yu-Tsung Lu
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Patent number: 11818917Abstract: A display device including a display panel including a plurality of transistors and displaying an image on a front surface thereof; and a sensing module on a rear surface of the display panel, wherein the display panel includes a first region that overlaps the sensing module and a second region that does not overlap the sensing module, a W/L ratio of one of the transistors in the first region is greater than a W/L ratio of another of the transistors in the second region, the W/L ratio being obtained by dividing a width of a channel of the transistor by a length of the channel.Type: GrantFiled: November 15, 2019Date of Patent: November 14, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jin Woo Park, Won Kyu Kwak, Dong Wook Kim, Hyun-Chol Bang
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Patent number: 11810495Abstract: Disclosed is a display driver integrated circuit (IC) which includes a data line driver that drives a first data line connected with a first pixel of a display in response to output image data, and a dithering circuit that receives a brightness value of the display, calculates a first reference grayscale value corresponding to the brightness value using a first group of threshold grayscale values, receives input image data with a first grayscale value, which corresponds to the first pixel, compares the first grayscale value and the first reference grayscale value, and generates the output image data having not the first grayscale value but an output grayscale value when the first grayscale value is smaller than the first reference grayscale value.Type: GrantFiled: October 5, 2022Date of Patent: November 7, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Byoungyoon Jang, Yong Hoon Yu, Se Whan Na, Jong-Hee Na, Hyeonsu Park
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Patent number: 11804196Abstract: Provided is a display substrate. The display substrate includes a base substrate, a plurality of gate lines, a plurality of data lines, and a plurality of rows of pixels arranged in an array on the base substrate, and a plurality of shift circuits disposed on the base substrate, wherein in a plurality of pixels connected to each shift circuit, the respective pixels sharing the same data line have the same color, and each shift circuit is connected to one turn-on signal terminal.Type: GrantFiled: October 23, 2020Date of Patent: October 31, 2023Assignees: Beijing BOE Display Technology Co., Ltd., BOE Technology Group Co., Ltd.Inventors: Tengfei Ding, Yang Wang, Shijun Wang, Bo Feng, Jun Fan, Wenkai Mu, Yi Liu, Xinlan Yang, Li Tian
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Patent number: 11804162Abstract: A display device includes: a timing controlling part generating a three color image data, a data control signal and a gate control signal using an image signal and a plurality of timing signals, generating a first four color data having a white gray level data greater than 0 and a second four color data having the white gray level data of 0 using the three color image data, and generating a four color image data using the first and second four color data; a data driving part generating a data signal using the four color data and the data control signal; a gate driving part generating a gate signal using the gate control signal; and a display panel including a pixel having red, green, blue and white subpixels and displaying an image using the data signal and the gate signal.Type: GrantFiled: September 15, 2021Date of Patent: October 31, 2023Assignee: LG Display Co., Ltd.Inventor: Min-Chul Byun
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Patent number: 11778859Abstract: A display device including a display panel including a plurality of transistors and displaying an image on a front surface thereof; and a sensing module on a rear surface of the display panel, wherein the display panel includes a first region that overlaps the sensing module and a second region that does not overlap the sensing module, a W/L ratio of one of the transistors in the first region is greater than a W/L ratio of another of the transistors in the second region, the W/L ratio being obtained by dividing a width of a channel of the transistor by a length of the channel.Type: GrantFiled: November 15, 2019Date of Patent: October 3, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jin Woo Park, Won Kyu Kwak, Dong Wook Kim, Hyun-Chol Bang
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Patent number: 11774822Abstract: The purpose of the present invention is to realize a structure that the testing terminals are remained in the final product in the liquid crystal display device having a variant display area. The structure of the present invention is as follows. The display area is variant, the outer shapes of the counter substrate 200 and the TFT substrate are also variant similar to the display area. The terminal area formed on the TFT substrate has a straight first area, a second area and a third area; the second area and the third are bent from the first area and formed at sides of the first area. A plurality of terminals to drive the liquid crystal display device exist in the first area, and a plurality of terminals for testing the liquid crystal display device exist in the second area and the third area.Type: GrantFiled: June 20, 2022Date of Patent: October 3, 2023Assignee: Japan Display Inc.Inventor: Gen Koide
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Patent number: 11756473Abstract: Disclosed are a digital gamma circuit capable of reducing a chip area and adjusting white color coordinates, and a source driver including the same. The digital gamma circuit may include a digital gamma algorithm for setting a gamma curve for each R, G, or B. Through the digital gamma algorithm, values of X-axis points of the gamma curve may be set, values of Y-axis points of the gamma curve corresponding to the values of the X-axis points may be set, and a value of at least one Y-axis point indicative of white among the values of the Y-axis points may be adjusted by adding an offset value thereto.Type: GrantFiled: December 17, 2021Date of Patent: September 12, 2023Assignee: LX SEMICON CO., LTD.Inventor: Young Jun Jun
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Patent number: 11754868Abstract: A liquid crystal display panel is provided. A micro-lens array, a black matrix layer array, and a detector array are sequentially disposed between a cover plate and an array substrate, and a combination of the micro-lens array and the black matrix layer array filters out more interference light, so that most of light entering the detector array is fingerprint reflected light, which improves an accuracy of fingerprint recognition. A liquid crystal display device having the liquid crystal display panel is also provided.Type: GrantFiled: July 30, 2020Date of Patent: September 12, 2023Inventors: Huanli Yang, Guowei Zha
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Patent number: 11721298Abstract: A display panel and a display device are provided. The display panel includes a data driving unit provided a specific sequence of polarities and complementary high/low level for color shift compensation from a 1st terminal to a 16th terminal in each cycle unit to solve an issue of liquid crystal panel flicker, crosstalk, etc.Type: GrantFiled: January 7, 2022Date of Patent: August 8, 2023Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Jhenwei He
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Patent number: 11721297Abstract: Provided is a display method applicable to a display device, the display device including a liquid crystal light control panel and a liquid crystal display (LCD) panel stacked together, the method including: acquiring a first sub-image and a second sub-image of an image to be displayed on the LCD panel, a boundary of the first sub-image being in contact with a boundary of the second sub-image; and decreasing a grayscale value of a first region, which is in contact with a boundary of a second light control region, in a first light control region, in response to determining that a grayscale value of the second sub-image is greater than a grayscale threshold.Type: GrantFiled: November 12, 2020Date of Patent: August 8, 2023Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Guangyun Tong, Zhuolong Li, Yu Zhang, Bochang Wang
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Patent number: 11715430Abstract: A backlight driving method includes steps of: (A) generating an original synchronization control (SC) signal, and a serial input signal that contains multiple predetermined delay values; (B) generating multiple internal SC signals based on the original SC signal and the delay values, such that respective time delays of the internal SC signals with respect to the original SC signal are respectively dependent on the delay values; and (C) generating multiple backlight driving outputs based on the internal SC signals to respectively drive multiple backlight sources, such that the backlight sources emit light in an order dependent on the delay values.Type: GrantFiled: May 10, 2022Date of Patent: August 1, 2023Assignee: Macroblock, Inc.Inventors: Chang-Lin Chen, Chun-Yi Li, Wei-Chung Chen
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Patent number: 11705056Abstract: An electroluminescence display apparatus includes a display panel, including a pixel including a driving element and a light emitting device, and a panel driving circuit supplying the pixel with a first data voltage for a display driving operation and a display scan signal synchronized with the first data voltage in a vertical active period succeeding a first vertical blank period and maintaining the first data voltage in the pixel during a second vertical blank period succeeding the vertical active period, wherein a length of the first vertical blank period is fixed regardless of a variation of a frame frequency, and a length of the second vertical blank period varies based on the variation of the frame frequency.Type: GrantFiled: July 28, 2021Date of Patent: July 18, 2023Assignee: LG Display Co., Ltd.Inventors: Dong In Noh, Young Ho Kim, Yang Seok Jeong
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Patent number: 11694633Abstract: The display device includes a display panel where sub-pixels are disposed. The display device includes a data driver that supplies a data voltage to the sub-pixels via data lines. The sub-pixels includes first sub-pixels to third sub-pixels. The first sub-pixels and second sub-pixels are alternately disposed on odd-numbered columns and the third sub-pixels are disposed on even-numbered columns. Each of the data lines branches into sub-data lines through a MUX, and the sub-data lines are disposed on both sides of the sub-pixels disposed on a column. Any one third sub-pixel of the third sub-pixels disposed on a row is connected to a sub-data line disposed on one side of the any one of third sub-pixel. Further, another third sub-pixel adjacent to any one third sub-pixel disposed on the row is connected to a sub-data line disposed on another side of the adjacent third sub-pixel. Thus, line dim is reduced.Type: GrantFiled: August 26, 2021Date of Patent: July 4, 2023Assignee: LG Display Co., Ltd.Inventors: MinJic Lee, Yeseul Han, JeongOk Jo, Kwanghyun Choi
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Patent number: 11694639Abstract: The present invention provides a backlight module and a method for calculating viewing angle for an unknown backlight module. In the present invention, brightness-viewing angle values of the unknown backlight module can be calculated according to the color saturation-viewing angle data of the unknown backlight module at specific viewing angles, and thus are taken to deploy the brightness-viewing angle values of a produced backlight module to be as the same as the brightness-viewing angle values of the unknown backlight module.Type: GrantFiled: September 4, 2020Date of Patent: July 4, 2023Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.Inventor: Bo Hai