公开(公告)号：US09530384B2

公开(公告)日：2016-12-27

申请号：US14439722

申请日：2013-11-08

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohji Saitoh ,  Akihisa Iwamoto ,  Tomohiko Nishimura ,  Masaki Uehata ,  Jun Nakata ,  Masami Ozaki

IPC: G09G5/00 ,  G09G5/18 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G5/18 ,  G09G3/20 ,  G09G3/36 ,  G09G3/3648 ,  G09G3/3696 ,  G09G2320/0247 ,  G09G2320/0285 ,  G09G2320/046

Abstract: In a display device that can use a low frequency drive method, in the case of low frequency drive, in a data correction unit (23) of a display control circuit (200), a pixel grayscale value is set such that the differential value between the potential difference between the pixel electrode and the common electrode when a voltage of positive polarity is applied and the potential difference between the pixel electrode and the common electrode when a voltage of negative polarity is applied becomes larger than during normal drive. With this, a correction amount (shift amount) is made larger during low frequency drive than during normal drive, whereby flickers and ghosting during low frequency drive are prevented.

Abstract translation: 在可以使用低频驱动方式的显示装置中，在低频驱动的情况下，在显示控制电路（200）的数据校正部（23）中，设定像素灰度值， 当施加正极性的电压时像素电极和公共电极之间的电位差，并且当施加负极性的电压时像素电极和公共电极之间的电位差变得比正常驱动期间更大。 由此，在低频驱动期间的校正量（偏移量）比在正常驱动期间更大，从而防止低频驱动期间的闪烁和重影。

公开(公告)号：US20150269900A1

公开(公告)日：2015-09-24

申请号：US14435783

申请日：2013-10-11

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Akihisa Iwamoto ,  Masami Ozaki ,  Tomohiko Nishimura ,  Kohji Saitoh ,  Masaki Uehata ,  Jun Nakata

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G3/3677 ,  G09G3/3696 ,  G09G2300/0819 ,  G09G2300/0876 ,  G09G2310/0251 ,  G09G2310/0286 ,  G09G2330/02 ,  G09G2330/021 ,  G09G2330/027 ,  G11C19/28

Abstract: A gate driver (24) which is provided by an IGZO-GDM and a level shifter circuit (13) are connected to each other via a first through a fifth wires (OL1 through OL5). Each wire (OL) is connected to a discharge unit (190). If an electric power supply to a first through a fifth output circuits (OC1 through OC5) in the level shifter circuit (13) becomes lower than a lower operation limit value during a power-off sequence which is supposed to remove a residual charge from inside a panel, outputs from the first through the fifth output circuits (OC1 through OC5) assume a high-impedance state, whereupon a potential on each wire (OL) is drawn by a discharge unit (190) into a ground potential. Therefore, residual charge inside the panel is removed quickly and stably when power supply is shut off.

Abstract translation: 由IGZO-GDM和电平移位器电路（13）提供的栅极驱动器（24）经由第一至第五布线（OL1至OL5）彼此连接。 每个线（OL）连接到放电单元（190）。 如果在电源关闭序列期间电平移位器电路（13）中的第一至第五输出电路（OC1至OC5）的电力供应低于下一个操作限制值，该电源断开序列应该从内部去除剩余电荷 一个面板，从第一至第五输出电路（OC1至OC5）的输出呈现高阻抗状态，于是每个导线（OL）上的电位由放电单元（190）吸入地电位。 因此，当电源关闭时，面板内的残余电荷被快速稳定地去除。

公开(公告)号：US20150042636A1

公开(公告)日：2015-02-12

申请号：US14375444

申请日：2013-01-28

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohji Saitoh ,  Akihisa Iwamoto ,  Jun Nakata ,  Masaki Uehata ,  Tomohiko Nishimura ,  Masami Ozaki

IPC: G02F1/133 ,  G09G3/36 ,  H01L27/12 ,  G02F1/1368 ,  G02F1/1362

CPC classification number: G02F1/13306 ,  G02F1/136277 ,  G02F1/136286 ,  G02F1/1368 ,  G09G3/3614 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3674 ,  G09G2310/0243 ,  G09G2310/067 ,  G09G2320/0204 ,  G09G2330/027 ,  H01L27/1225

Abstract: The present invention is intended to make it unlikely that, in a case where a transistor is turned on in preparation for an operation to turn off a power source of a liquid crystal display device, a DC voltage becomes applied across a pixel even if potential variation (kickback) occurs at a pixel electrode in reaction to a change in status of the transistor from an on state to an off state. A liquid crystal display device of the present invention includes: a data signal line; a scan signal line; a pixel electrode; a transistor connected to (i) the data signal line, (ii) the scan signal line, and (iii) the pixel electrode; and a common electrode, the liquid crystal display device being configured to turn on the transistor during a power-off sequence by causing a change in an electric potential of the scan signal line, the electric potential of the scan signal line increasing up to a first electric potential at a first timing after the change is initiated, and an output electric potential supplied to the data signal line at a second timing which comes after the first timing being set to a value higher than an output electric potential supplied to the common electrode at the second timing.

Abstract translation: 本发明旨在使得在准备关闭液晶显示装置的电源的操作的晶体管导通的情况下不可能，即使电位变化，直流电压也被施加到像素上 （反冲）发生在像素电极处，以反应晶体管的状态从接通状态到断开状态的变化。 本发明的液晶显示装置包括：数据信号线; 扫描信号线; 像素电极; 连接到（i）数据信号线的晶体管，（ii）扫描信号线，和（iii）像素电极; 和公共电极，所述液晶显示装置被配置为通过使所述扫描信号线的电位发生变化而在断电序列期间导通所述晶体管，所述扫描信号线的电位增加到第一 在开始改变之后的第一定时处的电位，以及在第一定时之后的第二定时处被提供给数据信号线的输出电位被设置为高于提供给公共电极的输出电位的值 第二个时机。

公开(公告)号：US20150009195A1

公开(公告)日：2015-01-08

申请号：US14375163

申请日：2013-01-25

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohji Saitoh ,  Akihisa Iwamoto ,  Masami Ozaki ,  Masaki Uehata ,  Jun Nakata ,  Tomohiko Nishimura

IPC: G09G3/36 ,  G02F1/1362 ,  G02F1/1343 ,  G02F1/1368

CPC classification number: G09G3/3655 ,  G02F1/1343 ,  G02F1/136213 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/133397 ,  G09G3/3648 ,  G09G3/3674 ,  G09G3/3685 ,  G09G3/3688 ,  G09G2300/0478 ,  G09G2310/0245 ,  G09G2310/067 ,  G09G2320/046 ,  G09G2330/027

Abstract: A liquid crystal display device includes: a data signal line; a scan signal line; a pixel electrode; a transistor connected to (i) the data signal line, (ii) the scan signal line, and (iii) the pixel electrode; and a common electrode, the liquid crystal display device being configured to turn on the transistor during a power-off sequence by causing a change in an electric potential of the scan signal line, the electric potential of the scan signal line reaching a first electric potential at a first timing after the change is initiated, and the common electrode being in an electrically floating state at a second timing which comes after the first timing. This, in a case where the transistor is turned on in preparation for an operation to turn off a power source of the liquid crystal display device, makes it unlikely for a DC voltage to be applied across a pixel even if potential variation (kickback) occurs at the pixel electrode in reaction to a change in status of the transistor from an on state to an off state.

Abstract translation: 液晶显示装置包括：数据信号线; 扫描信号线; 像素电极; 连接到（i）数据信号线的晶体管，（ii）扫描信号线，和（iii）像素电极; 和公共电极，所述液晶显示装置被配置为通过使所述扫描信号线的电位发生变化而在断电序列期间导通所述晶体管，所述扫描信号线的电位达到第一电位 在变化开始之后的第一定时，并且公共电极在第一定时之后的第二定时处于电浮动状态。 这是为了准备关闭液晶显示装置的电源的操作而导通晶体管的情况，即使发生电位变化（反冲）也不可能在像素上施加直流电压 在晶体管的状态从导通状态到断开状态的反应中，在像素电极处。

公开(公告)号：US20150279333A1

公开(公告)日：2015-10-01

申请号：US14439722

申请日：2013-11-08

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Kohji Saitoh ,  Akihisa Iwamoto ,  Tomohiko Nishimura ,  Masaki Uehata ,  Jun Nakata ,  Masami Ozaki

IPC: G09G5/18 ,  G09G3/36

CPC classification number: G09G5/18 ,  G09G3/20 ,  G09G3/36 ,  G09G3/3648 ,  G09G3/3696 ,  G09G2320/0247 ,  G09G2320/0285 ,  G09G2320/046

Abstract: In a display device that can use a low frequency drive method, in the case of low frequency drive, in a data correction unit (23) of a display control circuit (200), a pixel grayscale value is set such that the differential value between the potential difference between the pixel electrode and the common electrode when a voltage of positive polarity is applied and the potential difference between the pixel electrode and the common electrode when a voltage of negative polarity is applied becomes larger than during normal drive. With this, a correction amount (shift amount) is made larger during low frequency drive than during normal drive, whereby flickers and ghosting during low frequency drive are prevented.

Abstract translation: 在可以使用低频驱动方式的显示装置中，在低频驱动的情况下，在显示控制电路（200）的数据校正部（23）中，设定像素灰度值， 当施加正极性的电压时像素电极和公共电极之间的电位差，并且当施加负极性的电压时像素电极和公共电极之间的电位差变得比正常驱动期间更大。 由此，在低频驱动期间的校正量（偏移量）比在正常驱动期间更大，从而防止低频驱动期间的闪烁和重影。

公开(公告)号：US09666140B2

公开(公告)日：2017-05-30

申请号：US14650908

申请日：2013-12-06

Applicant: Sharp Kabushiki Kaisha

Inventor： Jun Nakata ,  Masami Ozaki ,  Akihisa Iwamoto ,  Tomohiko Nishimura ,  Kohji Saitoh ,  Masaki Uehata

IPC: G09G3/34 ,  G09G3/36 ,  G06K9/00 ,  G09G3/20

CPC classification number: G09G3/3406 ,  G06K9/0051 ,  G09G3/2092 ,  G09G3/3607 ,  G09G3/3618 ,  G09G3/3659 ,  G09G3/3674 ,  G09G3/3677 ,  G09G3/3685 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/062 ,  G09G2310/063 ,  G09G2310/065 ,  G09G2320/0233 ,  G09G2320/062 ,  G09G2320/0666 ,  G09G2330/022 ,  G09G2340/0435

Abstract: The invention provides a gate-in-panel display device capable of preventing deterioration of thin-film transistors during pause drive, as well as a method for driving the same.At the end of a drive period, an active clear signal is provided to thin-film transistors in unit circuits, each thin-film transistor being connected to either a first or second node at a gate terminal, thereby bringing the thin-film transistors into ON state. As a result, the voltages of the first and second nodes are set to a reference voltage. Thus, even if a pause period lasts for a long period of time, the gate terminals of the thin-film transistors are not subjected to sustained voltage application, leading to no threshold voltage shifts.

公开(公告)号：US09570030B2

公开(公告)日：2017-02-14

申请号：US14435783

申请日：2013-10-11

Applicant: Sharp Kabushiki Kaisha

Inventor： Akihisa Iwamoto ,  Masami Ozaki ,  Tomohiko Nishimura ,  Kohji Saitoh ,  Masaki Uehata ,  Jun Nakata

IPC: G09G3/36 ,  G11C19/28

CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G3/3677 ,  G09G3/3696 ,  G09G2300/0819 ,  G09G2300/0876 ,  G09G2310/0251 ,  G09G2310/0286 ,  G09G2330/02 ,  G09G2330/021 ,  G09G2330/027 ,  G11C19/28

Abstract: A gate driver (24) which is provided by an IGZO-GDM and a level shifter circuit (13) are connected to each other via a first through a fifth wires (OL1 through OL5). Each wire (OL) is connected to a discharge unit (190). If an electric power supply to a first through a fifth output circuits (OC1 through OC5) in the level shifter circuit (13) becomes lower than a lower operation limit value during a power-off sequence which is supposed to remove a residual charge from inside a panel, outputs from the first through the fifth output circuits (OC1 through OC5) assume a high-impedance state, whereupon a potential on each wire (OL) is drawn by a discharge unit (190) into a ground potential. Therefore, residual charge inside the panel is removed quickly and stably when power supply is shut off.

Abstract translation: 由IGZO-GDM和电平移位器电路（13）提供的栅极驱动器（24）经由第一至第五布线（OL1至OL5）彼此连接。 每个线（OL）连接到放电单元（190）。 如果在电源关闭序列期间电平移位器电路（13）中的第一至第五输出电路（OC1至OC5）的电力供应低于下一个操作限制值，该电源断开序列应该从内部去除剩余电荷 一个面板，从第一至第五输出电路（OC1至OC5）的输出呈现高阻抗状态，于是每个导线（OL）上的电位由放电单元（190）吸入地电位。 因此，当电源关闭时，面板内的残余电荷被快速稳定地去除。

公开(公告)号：US09355606B2

公开(公告)日：2016-05-31

申请号：US14375163

申请日：2013-01-25

Applicant: Sharp Kabushiki Kaisha

Inventor： Kohji Saitoh ,  Akihisa Iwamoto ,  Masami Ozaki ,  Masaki Uehata ,  Jun Nakata ,  Tomohiko Nishimura

IPC: G06F3/038 ,  G09G5/00 ,  G09G3/36 ,  G09G3/04 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1333

CPC classification number: G09G3/3655 ,  G02F1/1343 ,  G02F1/136213 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/133397 ,  G09G3/3648 ,  G09G3/3674 ,  G09G3/3685 ,  G09G3/3688 ,  G09G2300/0478 ,  G09G2310/0245 ,  G09G2310/067 ,  G09G2320/046 ,  G09G2330/027

Abstract: A liquid crystal display device includes: a data signal line; a scan signal line; a pixel electrode; a transistor connected to (i) the data signal line, (ii) the scan signal line, and (iii) the pixel electrode; and a common electrode, the liquid crystal display device being configured to turn on the transistor during a power-off sequence by causing a change in an electric potential of the scan signal line, the electric potential of the scan signal line reaching a first electric potential at a first timing after the change is initiated, and the common electrode being in an electrically floating state at a second timing which comes after the first timing. This, in a case where the transistor is turned on in preparation for an operation to turn off a power source of the liquid crystal display device, makes it unlikely for a DC voltage to be applied across a pixel even if potential variation (kickback) occurs at the pixel electrode in reaction to a change in status of the transistor from an on state to an off state.

Abstract translation: 液晶显示装置包括：数据信号线; 扫描信号线; 像素电极; 连接到（i）数据信号线的晶体管，（ii）扫描信号线，和（iii）像素电极; 和公共电极，所述液晶显示装置被配置为通过使所述扫描信号线的电位发生变化而在断电序列期间导通所述晶体管，所述扫描信号线的电位达到第一电位 在变化开始之后的第一定时，并且公共电极在第一定时之后的第二定时处于电浮动状态。 这是为了准备关闭液晶显示装置的电源的操作而导通晶体管的情况，即使发生电位变化（反冲）也不可能在像素上施加直流电压 在晶体管的状态从导通状态到断开状态的反应中，在像素电极处。