公开(公告)号：US09552785B2

公开(公告)日：2017-01-24

申请号：US14652344

申请日：2013-12-13

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohhei Tanaka ,  Mitsuhiro Murata ,  Akihito Jinda ,  Yosuke Iwata

IPC: G09G3/36 ,  G02F1/1345 ,  G02F1/1343

CPC classification number: G09G3/3614 ,  G02F1/134363 ,  G02F1/13454 ,  G02F2001/134381 ,  G09G2300/0495

Abstract: Provided is a liquid crystal display device in which both a vertical electric field and a horizontal electric field are used and flickering is hardly recognized. The liquid crystal display device includes a liquid crystal panel and a control unit. The control unit includes a horizontal electric field control unit and a vertical electric field control unit. The horizontal electric field control unit controls the potentials of pairs of drive electrodes included in the liquid crystal panel, and thereby controls a horizontal electric field that is generated between each pair of drive electrodes. The vertical electric field control unit controls the potentials of a common electrode and an opposite electrode included in the liquid crystal panel, and thereby controls a vertical electric field that is generated between the common electrode and the opposite electrode. The horizontal electric field control unit controls the intensity and the polarity of the horizontal electric field when the vertical electric field control unit is causing the vertical electric field to be generated. The vertical electric field control unit inverts the polarity of the vertical electric field when the horizontal electric field control unit is maintaining the polarity of the horizontal electric field.

Abstract translation: 提供一种其中使用垂直电场和水平电场两者并且几乎不识别闪烁的液晶显示装置。 液晶显示装置包括液晶面板和控制单元。 控制单元包括水平电场控制单元和垂直电场控制单元。 水平电场控制单元控制液晶面板中包括的驱动电极对的电位，从而控制在每对驱动电极之间产生的水平电场。 垂直电场控制单元控制液晶面板中包含的公共电极和对置电极的电位，从而控制在公共电极和对置电极之间产生的垂直电场。 当垂直电场控制单元产生垂直电场时，水平电场控制单元控制水平电场的强度和极性。 当水平电场控制单元保持水平电场的极性时，垂直电场控制单元反转垂直电场的极性。

公开(公告)号：US09341904B2

公开(公告)日：2016-05-17

申请号：US14390460

申请日：2013-03-15

Applicant: Sharp Kabushiki Kaisha

Inventor： Seiichi Uchida ,  Seiji Kaneko ,  Yasuyuki Ogawa ,  Yutaka Takamaru ,  Kohhei Tanaka ,  Mitsuhiro Murata ,  Akira Shibazaki ,  Ken Kuboki

IPC: G02F1/1362 ,  G02F1/1343

CPC classification number: G02F1/136286 ,  G02F1/134309

Abstract: The TFT substrate (10) of this liquid crystal display device (100) includes: a TFT (11) which is provided for each pixel; an upper electrode (12) which is electrically connected to the TFT's drain electrode (11d); a lower electrode (13) which is arranged under the upper electrode; and a dielectric layer (14) which is arranged between the upper and lower electrodes. Its counter substrate (20) includes a counter electrode (21) which faces the upper electrode. The upper electrode has first and second regions (R1, R2) which have mutually different electrode structures, and a third region (R3) which electrically connects the first and second regions to the drain electrode. The third region of the upper electrode includes a symmetrical connecting portion (12c) that is a conductive film pattern, of which the shape is substantially symmetrical with respect to a virtual line (L1) that splits each pixel into two adjacent regions in a row direction.

Abstract translation: 该液晶显示装置（100）的TFT基板（10）具备：为每个像素设置的TFT（11） 与TFT的漏电极（11d）电连接的上电极（12）; 布置在所述上​​电极下方的下电极（13）; 以及布置在上电极和下电极之间的电介质层（14）。 其对置基板（20）包括面向上电极的对电极（21）。 上电极具有彼此不同的电极结构的第一和第二区域（R1，R2），以及将第一和第二区域电连接到漏电极的第三区域（R3）。 上电极的第三区域包括对称连接部分（12c），其是导电膜图案，其形状相对于将每个像素分成行方向的两个相邻区域的虚拟线（L1）基本对称 。

公开(公告)号：US20140327654A1

公开(公告)日：2014-11-06

申请号：US14366312

申请日：2012-12-14

Applicant: Sharp Kabushiki Kaisha

Inventor： Yasuhiro Sugita ,  Kazutoshi Kida ,  Kohhei Tanaka

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G02F1/13338 ,  G06F3/0412 ,  G06F3/042 ,  G09G3/3648

Abstract: 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.

Abstract translation: 提供了一种触摸传感器嵌入式显示面板，其具有降低的开口率和减小的帧面积的增加，降低的功耗和改善的操作性能。 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。

公开(公告)号：US11315489B1

公开(公告)日：2022-04-26

申请号：US17233877

申请日：2021-04-19

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Adnan Heganovic ,  Kohhei Tanaka ,  Ryo Yonebayashi ,  Masahito Sano

IPC: G09G3/3233 ,  G09G3/3283

Abstract: A pixel circuit includes a drive transistor configured to control an amount of current to a light emitting device during an emission phase depending upon a voltage applied to a control terminal of the drive transistor, the drive transistor having a first terminal and a second terminal. During a first phase, an anode of the light emitting device is set to a reference voltage and the first terminal of the drive transistor is set to a fixed data voltage such that the drive transistor is stressed with a fixed source-to-gate voltage to prevent a drift of a threshold voltage in the drive transistor thereby preventing a drift in screen brightness. During a second phase, the anode of the light emitting device is set to the reference voltage and the first terminal of the drive transistor is set to a voltage of the first power supply.

公开(公告)号：US10935859B2

公开(公告)日：2021-03-02

申请号：US16495457

申请日：2018-03-27

Applicant: Sharp Kabushiki Kaisha

Inventor： Takayuki Nishiyama ,  Ryo Yonebayashi ,  Kohhei Tanaka

IPC: G02F1/1362

Abstract: Provide is a technique that enables to easily arrange driving circuits for driving gate lines within pixels, and to reduce display defects in a vertical stripe pattern. An active matrix substrate includes, in each pixel PIX, a pixel electrode 141, and a pixel switching element 10 that is connected with a gate line 13, a source line 15, and the pixel electrode 141. Driving circuit elements 110 of driving circuits for driving the gate lines 13 are arranged in a light-shielding area BM in a part of the pixels PIX in a display area. The pixel switching elements 10 in a row of the pixels in which the driving circuit element 110 is arranged are provided at non-uniform intervals, and drains of the pixel switching elements 10 in the same row are on the same side with respect to the source lines to which the pixel switching elements 10 are connected.

公开(公告)号：US10825414B2

公开(公告)日：2020-11-03

申请号：US16659681

申请日：2019-10-22

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohhei Tanaka ,  Takuya Watanabe ,  Yasuaki Iwase

IPC: G09G3/36

Abstract: An active-matrix display device has a gate driver for driving a plurality of gate bus lines of a display portion in accordance with a multi-phase gate clock signal. The gate driver includes first and second gate drivers disposed to opposite sides of the display portion. Each of the first and second gate drivers includes a plurality of buffer circuits connected to the gate bus lines and a plurality of bistable circuits cascaded together so as to constitute a shift register. Each bistable circuit controls two buffer circuits. The bistable circuits are disposed in an interlaced arrangement between the first and second gate drivers. Each of the two buffer circuits controlled by each bistable circuit includes a boost capacitor, and one of the two buffer circuits includes a transistor for isolating a boost effect.

公开(公告)号：US10410594B2

公开(公告)日：2019-09-10

申请号：US15528105

申请日：2015-11-19

Applicant: Sharp Kabushiki Kaisha

Inventor： Ryo Yonebayashi ,  Kohhei Tanaka ,  Takeshi Noma ,  Takayuki Nishiyama

IPC: G09G3/20 ,  G09G3/36 ,  G02F1/1335 ,  G02F1/1362

Abstract: The present invention provides a technique for reducing pixel brightness unevenness in a case where driving circuits for switching gate lines to a selected or non-selected state are provided in pixels. An active matrix substrate includes, in each pixel PIX, a pixel-switching element 10 and a pixel electrode PXB. Further, in the active matrix substrate, a plurality of driving circuits that switch one gate line to a selected or non-selected state are arranged in the pixels, and control lines 16 that supply control signals to the driving circuits are arranged in the pixels. Each driving circuit includes a plurality of switching elements and an internal line netA. At least a part of the driving circuit lines among the control lines 16 connected to the driving circuit, and the internal line netA in the driving circuits, are arranged in the vicinity of the pixel-switching element 10, and potentials thereof do not change at a timing when the gate line 13 connected with the pixel-switching element 10 shifts to the non-selected state.

公开(公告)号：US10360864B2

公开(公告)日：2019-07-23

申请号：US15305795

申请日：2015-04-21

Applicant: Sharp Kabushiki Kaisha

Inventor： Takayuki Nishiyama ,  Kohhei Tanaka

IPC: G09G3/36 ,  G02F1/133 ,  G02F1/1368 ,  G02F1/1362

Abstract: A technique of suppressing variations in property changes of switching elements in drive circuits provided for each gate line to reduce display performance degradation is provided. An active-matrix substrate includes: a plurality of drive circuits (11) provided in a display region for each gate line, for switching the gate line to a selected state; and a signal supply unit (12g) for supplying control signals (GCK1, GCK2, CLR, VSS) to each of the plurality of drive circuits for each gate line. The drive circuits (11) each include a plurality of switching elements that are turned on or off in response to the control signals. At predetermined time intervals, the signal supply unit (12g): supplies, to at least one of the plurality of switching elements in any of the plurality of drive circuits, a stop signal that holds the switching element off; and supplies, to each of the other switching elements in the drive circuit and the plurality of switching elements in each of the other drive circuits, a drive signal that turns the switching element on.

公开(公告)号：US10121429B2

公开(公告)日：2018-11-06

申请号：US14916224

申请日：2014-08-27

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohhei Tanaka ,  Hidefumi Yoshida

IPC: G09G3/36 ,  G11C19/28 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/1345

Abstract: The present invention addresses the problem of reducing power consumption when switching a gate line between a selected state and a non-selected state, and of providing a narrower frame for an active matrix substrate. A gate driver (11) that scans each gate line is formed inside a display area in an active matrix substrate (20a) having gate lines (13G) and data lines formed therein. The gate driver (11) switches the gate line to either a selected state or a non-selected state, in accordance with a control signal supplied via a line (15L). The gate driver (11) includes a high-charge drive circuit (11a), a low-charge drive circuit (11b), and a shift register (11c). The high-charge drive circuit is supplied with a first DC voltage signal corresponding to the selected state via the line (15L), and charges the gate line to the potential of the first DC voltage signal. The low-charge drive circuit (11b) is supplied with a second DC voltage signal corresponding to the non-selected state, and charges the gate line to the potential of the second DC voltage signal.

公开(公告)号：US10078239B2

公开(公告)日：2018-09-18

申请号：US15306825

申请日：2015-04-27

Applicant: Sharp Kabushiki Kaisha

Inventor： Yasuhiro Sugita ,  Kohhei Tanaka ,  Takeshi Noma ,  Takayuki Nishiyama ,  Ryo Yonebayashi ,  Kenshi Tada ,  Shinji Yamagishi ,  Jean Mugiraneza

IPC: G02F1/1333 ,  G06F3/041 ,  G02F1/1339 ,  G02F1/1343 ,  G02F1/1368 ,  G06F3/044 ,  G02F1/1362

CPC classification number: G02F1/13338 ,  G02F1/1339 ,  G02F1/134336 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13456 ,  G02F2201/121 ,  G02F2201/123 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04108

Abstract: Provided is a sensor-equipped display device (1) that includes: a first substrate (20a); a second substrate (20b) opposed to the first substrate (20a); a liquid crystal layer (LC); a plurality of first lines (15) extending in a first direction in a pixel area (AA); second lines extending in a second direction that is different from the first direction; pixel switching elements that are provided for pixels, respectively, and are connected to the first lines and the second lines; a plurality of sensor electrodes (SE, DL) provided at positions that overlap the pixel area on at least one of the first substrate and the second substrate, for detecting the contact or approach of the object; and a plurality of sensor lead-out lines that are provided in parallel to the first lines or the second lines in the pixel area on the first substrate, and are connected to the sensor electrodes, respectively.