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1. 发明授权

US11170719B1 TFT pixel threshold voltage compensation circuit with a source follower 有权
公开(公告)号：US11170719B1
公开(公告)日：2021-11-09
申请号：US17117476
申请日：2020-12-10
申请人： Sharp Kabushiki Kaisha
发明人： Tong Lu , Kohhei Tanaka
IPC分类号： G09G3/30 , G09G3/3258 , G09G3/3291 , H01L27/32 , G09G3/20
摘要： An enhanced pixel circuit for a display device provides separate compensation and data programming phases to permit minimization of the programming time. Variations in voltage supplies are accounted for by isolating the drive transistor from such power supply by using a second drive transistor configured as source follower relative to the first drive transistor. An on bias stress transistor is incorporated that can electrically connect the first drive transistor to the power supply during an on bias stress operation. During such operation, a voltage stress is applied to eliminate hysteresis effects associated with the drive transistor. The on bias stress operation may be performed as part of a refresh operation during which a data voltage is programmed to the pixel circuit, or as part of a low frequency operation during which a previously programming data voltage is maintained which reduces power consumption.

2. 发明授权

US09520097B2 Display device with compensating backlight drive circuit and method for driving same 有权
标题翻译：具有补偿背光驱动电路的显示装置及其驱动方法
公开(公告)号：US09520097B2
公开(公告)日：2016-12-13
申请号：US14351613
申请日：2012-10-31
申请人： Sharp Kabushiki Kaisha
发明人： Yutaka Takamaru , Seiji Kaneko , Yasuyuki Ogawa , Kaoru Yamamoto , Kohhei Tanaka , Seiichi Uchida , Noriaki Yamaguchi , Shigeyasu Mori
IPC分类号： G09G3/36 , G09G3/34
CPC分类号： G09G3/3648 , G09G3/3406 , G09G3/3614 , G09G2310/0237 , G09G2320/0247 , G09G2320/0626 , G09G2360/16
摘要： In a display control circuit (200) of a display device, an image pattern detection portion (230) detects whether an image is an anti-flicker pattern or not, and when it is an anti-flicker pattern, a backlight source is driven (typically, such that its luminance changes in the opposite phase relative to luminance changes that would occur), on the basis of predicted values, which are predetermined so as to compensate for the luminance changes that would occur. Moreover, the backlight is not turned on during the scanning period. As a result, flicker due to current leakage, etc., can be reduced or eliminated in a display device for which a scanning period and a scan stop period are set.
摘要翻译：在显示装置的显示控制电路（200）中，图像图案检测部（230）检测图像是否为防闪烁图案，并且当其为防闪烁图案时，驱动背光源（通常，使得其亮度相对于将发生的亮度变化在相反相位变化），基于预定值，预测值来补偿将发生的亮度变化。此外，在扫描期间背光源未被接通。结果，在设置了扫描期间和扫描停止期间的显示装置中，可以减少或消除由于电流泄漏等引起的闪烁。

3. 发明授权

US09513753B2 Touch-sensor-embedded display panel, display device provided therewith, and method for driving touch-sensor-embedded display panel 有权
标题翻译：触摸传感器嵌入式显示面板，与其一起提供的显示装置，以及用于驱动触摸式传感器嵌入式显示面板的方法
公开(公告)号：US09513753B2
公开(公告)日：2016-12-06
申请号：US14366312
申请日：2012-12-14
申请人： Sharp Kabushiki Kaisha
发明人： Yasuhiro Sugita , Kazutoshi Kida , Kohhei Tanaka
IPC分类号： G06F3/044 , G02F1/1333 , G06F3/041 , G06F3/042 , G09G3/36
CPC分类号： G06F3/044 , G02F1/13338 , G06F3/0412 , G06F3/042 , G09G3/3648
摘要： There is provided a touch-sensor-embedded display panel with reduced decrease in aperture ratio and reduced increase in frame area, with lowered power consumption and improved operation performance.A driving pixel (21) is constituted by: a thin film transistor (T1); a pixel electrode (Epix1); a driving common electrode (COM1); and a liquid crystal capacitance (Clc1) which is formed between the pixel electrode (Epix1) and the driving common electrode (COM1). A sensing pixel (22) is constituted by a thin film transistor (T2), a pixel electrode (Epix2), a sensing common electrode (COM2), and a liquid crystal capacitance (Clc2) which is formed between the pixel electrode (Epix2) and the sensing common electrode (COM2). Neither the driving pixel (21) nor the sensing pixel (22) include an auxiliary capacitance. The thin film transistors (T1, T2) have their channel layers formed of IGZO.
摘要翻译：驱动像素（21）由薄膜晶体管（T1）构成。像素电极（Epix1）; 驱动公共电极（COM1）; 以及形成在像素电极（Epix1）和驱动公共电极（COM1）之间的液晶电容（Clc1）。感测像素（22）由形成在像素电极（Epix2）之间的薄膜晶体管（T2），像素电极（Epix2），感测公共电极（COM2）和液晶电容（Clc2）和感测公共电极（COM2）。驱动像素（21）和感测像素（22）都不包括辅助电容。薄膜晶体管（T1，T2）的沟道层由IGZO形成。

4. 发明授权

US09494832B2 Liquid crystal display device 有权
标题翻译：液晶显示装置
公开(公告)号：US09494832B2
公开(公告)日：2016-11-15
申请号：US14414391
申请日：2013-07-16
申请人： Sharp Kabushiki Kaisha
发明人： Yosuke Iwata , Mitsuhiro Murata , Kohhei Tanaka , Akihito Jinda , Hidefumi Yoshida
IPC分类号： G02F1/1343 , G09G3/36 , G02F1/1333 , G02F1/1337 , G02F1/137
CPC分类号： G02F1/134309 , G02F1/133345 , G02F1/1337 , G02F2001/133742 , G02F2001/133773 , G02F2001/134381 , G02F2001/13712 , G09G3/36 , G09G2300/0447
摘要： Provided is a liquid crystal display device having excellent viewing angle characteristics and high contrast in a display mode using both a vertical electric field and a horizontal electric field. This liquid crystal display device is provided with a first substrate and a second substrate disposed facing each other, and a liquid crystal layer held between said first and second substrates. The liquid crystal layer contains liquid crystal molecules having a negative dielectric anisotropy. The first substrate is provided with a flat plate first electrode, a first insulating layer, and a second electrode provided in a layer other than that of the first electrode and provided separated from the first electrode by the first insulating layer. The second electrode has multiple comb-tooth sections and multiple slits, and the second substrate has a flat plate third electrode. Defining V1 as the potential difference between the first electrode and the third electrode, V2 as the potential difference between the first electrode and the second electrode, and V2_B as the potential difference between the first electrode and the second electrode when the lowest gradation is showed, V1, V2 and V2_B satisfy 0
摘要翻译：提供一种液晶显示装置，其在使用垂直电场和水平电场的显示模式中具有优异的视角特性和高对比度。该液晶显示装置设置有彼此相对配置的第一基板和第二基板，以及保持在所述第一基板和第二基板之间的液晶层。液晶层含有具有负介电各向异性的液晶分子。第一基板设置有平板第一电极，第一绝缘层和设置在除了第一电极之外的层中的第二电极，并且通过第一绝缘层与第一电极分离设置。第二电极具有多个梳齿部和多个狭缝，第二基板具有平板第三电极。将V1定义为第一电极和第三电极之间的电位差，V2作为第一电极和第二电极之间的电位差，V2_B作为当显示最低等级时的第一电极和第二电极之间的电位差， V1，V2和V2_B满足0 <| V2_B |≤| V2 | <| V1 |。

5. 发明授权

US11226529B2 Liquid crystal display device 有权
公开(公告)号：US11226529B2
公开(公告)日：2022-01-18
申请号：US16935239
申请日：2020-07-22
申请人： Sharp Kabushiki Kaisha
发明人： Keisuke Yoshida , Kohhei Tanaka
IPC分类号： G02F1/136 , G02F1/1362 , G02F1/1368 , G02F1/1333 , G02F1/1339 , G02F1/1335 , G02F1/1337
摘要： A liquid crystal display device includes an active matrix substrate, a counter substrate, and a liquid crystal layer. The active matrix substrate includes a top gate type oxide semiconductor TFT a plurality of gate wiring lines a plurality of source and an interlayer insulating layer The counter substrate includes a plurality of columnar spacers provided on a second substrate. Each columnar spacer is disposed in an intersecting region where the gate wiring line and the source wiring line intersect. A front face of the active matrix substrate on the liquid crystal layer side includes a plurality of first ridges overlapping the plurality of gate wiring lines and a plurality of second ridges overlapping the plurality of source wiring lines.

6. 发明授权

US11131895B2 Display device 有权
公开(公告)号：US11131895B2
公开(公告)日：2021-09-28
申请号：US16810979
申请日：2020-03-06
申请人： Sharp Kabushiki Kaisha
发明人： Kohhei Tanaka
IPC分类号： G02F1/1368 , G02F1/1362 , G02F1/1333 , G02F1/1343 , H01L27/32 , H01L51/52 , H01L27/12 , H01L29/24 , H01L29/786
摘要： A display device includes: an active matrix substrate including pixels arrayed in a matrix shape including rows and columns, and scanning wiring lines extending in a row direction and signal wiring lines extending in a column direction, wherein the active matrix substrate includes, in each of pixels, a TFT, a pixel electrode formed of a transparent conductive material and electrically connected to the TFT, a color filter located between the TFT and the pixel electrode, and a connecting electrode formed of a transparent conductive material and electrically connecting the TFT to the pixel electrode, the color filter includes a first color filter layer provided on the TFT and including a first contact hole, and a second color filter layer provided on the first color filter layer and including a second contact hole, and the first contact hole and the second contact hole do not overlap with each other.

7. 发明授权

US10679578B2 Display device having driving circuitry with driving gate lines 有权
公开(公告)号：US10679578B2
公开(公告)日：2020-06-09
申请号：US16147414
申请日：2018-09-28
申请人： SHARP KABUSHIKI KAISHA
发明人： Kohhei Tanaka , Kaoru Yamamoto , Tokihiro Yokono
IPC分类号： G09G3/36 , G06F3/041 , G06F3/044
摘要： The display device includes drive circuits 301 provided in correspondence to the gate lines, respectively, and alternately switches a scanning period for scanning the gate lines and a non-scanning period during one vertical scanning period. The drive circuit 301 includes netA(n), an output switching element M5 connected to netA(n), and a reset circuit R. The output switching element M5 applies a selection voltage to the gate line GLn. The potential of netA(n) changes between a first potential that is equal to or higher than a threshold voltage of the output switching element M5, and a second potential that is lower than the first potential. In the drive circuit 301 wherein a period while netA(n) thereof has the second potential overlaps with the non-scanning period, the reset circuit R resets the potential of netA(n) to the second potential, before the resumption of the scanning period after the non-scanning period.

8. 发明授权

US10235956B2 Active-matrix substrate and display device including the same 有权
公开(公告)号：US10235956B2
公开(公告)日：2019-03-19
申请号：US15305798
申请日：2015-04-21
申请人： Sharp Kabushiki Kaisha
发明人： Kohhei Tanaka , Takayuki Nishiyama , Takeshi Noma , Ryo Yonebayashi
IPC分类号： G09G3/36 , G02F1/133 , G02F1/1368 , G09G3/20 , G02F1/1335 , G02F1/1362
摘要： A technique of, in the case of changing, at predetermined time intervals, a drive circuit for switching a gate line to a selected state, preventing a stopped drive circuit from malfunctioning is provided. Each of a plurality of drive circuits provided for each gate line in an active-matrix substrate includes: a selection circuit unit including an output switching element that is turned on to apply a voltage to the gate line in response to a control signal; an internal line connected to a gate terminal of the output switching element and the gate line; and a potential control circuit unit connected to the internal line for controlling a potential of the internal line in response to the control signal. At predetermined time intervals, a signal supply unit: supplies, to at least one of the plurality of drive circuits, a potential control signal so that the potential of the internal line is controlled to be lower than a threshold voltage of the output switching element by the potential control circuit unit; and supplies, to each of the other drive circuits, a drive signal so that a selection voltage is applied to the gate line by the selection circuit unit.

9. 发明授权

US10115369B2 Active matrix substrate, and display device including the active matrix substrate 有权
公开(公告)号：US10115369B2
公开(公告)日：2018-10-30
申请号：US15307040
申请日：2015-04-22
申请人： Sharp Kabushiki Kaisha
发明人： Takeshi Noma , Kohhei Tanaka , Takayuki Nishiyama , Ryo Yonebayashi
IPC分类号： G09G3/36 , G02F1/1362 , G02F1/1368 , G09F9/30 , G09F9/35 , G09G3/20 , G02F1/1335 , G02F1/1333 , G02F1/1343
摘要： To reduce the parasitic capacitance of a driving circuit and definitely switches a gate line to a selection state, an active matrix substrate is provided. The active matrix substrate includes a driving circuit that switches a gate line (13G) to a selection state in a pixel region defined by a source line (15S) and the gate line (13G). The driving circuit includes: a plurality of switching elements including an output switching element (TFT-F) that supplies a selection voltage to the gate line; and an internal line (netA) to which a gate terminal of the output switching element (TFT-F) and at least a first switching element of the switching elements other than the output switching element are connected. The active matrix substrate includes a reduction part (C1 and C2) that reduce the parasitic capacitance of the driving circuit in the pixel region in which at least one of the internal line and the first switching element is located.

10. 发明授权

US09939696B2 Active matrix substrate and display device including active matrix substrate 有权
公开(公告)号：US09939696B2
公开(公告)日：2018-04-10
申请号：US15305394
申请日：2015-04-28
申请人： Sharp Kabushiki Kaisha
发明人： Youhei Nakanishi , Takayuki Nishiyama , Kohhei Tanaka , Takeshi Noma , Ryo Yonebayashi
IPC分类号： G09G3/36 , G02F1/1362 , G02F1/1343 , G02F1/1368 , G09F9/30 , H01L21/822 , H01L27/04 , H01L29/786 , H01L27/02 , H01L27/12
CPC分类号： G02F1/136204 , G02F1/1343 , G02F1/1368 , G09F9/30 , G09G3/3648 , G09G3/3688 , G09G2300/0413 , G09G2300/0426 , G09G2300/08 , G09G2310/08 , G09G2330/04 , G09G2330/08 , H01L21/822 , H01L27/0255 , H01L27/0266 , H01L27/04 , H01L27/1244 , H01L29/786
摘要： Provided is an active matrix substrate that can protected from static electricity, with the frame region being narrowed. An active matrix substrate (20a) includes a plurality of first lines (GL), a plurality of second lines (SL), and a protection part (50). The first lines are formed in a display region (30). The second lines are formed in the display region, and intersect with the first lines. The protection part protects the active matrix substrate from static electricity. The protection part includes a plurality of first protection circuits (50A), and a conductive unit (50B). The first protection circuits are connected to each of the first lines in the display region. The conductive unit is connected to each of the first protection circuits in the display region. Each of the first protection circuits, according to a potential of the first line to which the first protection circuit is connected, allows the first line and the conductive unit to be conductive with each other.

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