Touch driving circuit and driving method thereof

A technology of touch drive and circuit, which is applied in the field of touch and display, can solve problems such as uneven current and uneven screen display, and achieve the effects of reducing production costs, achieving brightness uniformity and reliability

Active Publication Date: 2017-07-07
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a touch driving circuit and its driving method, which are used to solve the problem that the currents flowing through different organic light emitting diodes are uneven when receiving the same data voltage caused by the threshold voltage drift of the existing driving transistors, resulting in uneven display of the entire screen. The problem of uniformity also solves the problem that current consumer electronics products require smaller screen size, thinner thickness and lighter weight

Method used

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  • Touch driving circuit and driving method thereof
  • Touch driving circuit and driving method thereof
  • Touch driving circuit and driving method thereof

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Embodiment Construction

[0049] The touch screen can be divided into two types: external type (external) and built-in type (in-cell). As the name suggests, the external touch screen is to place a touch device on the display panel. Since the built-in touch screen is integrated in the display panel, it can make consumer electronic products smaller in size, thinner in thickness and lighter in weight. The optical touch circuit in the embodiment of the present invention is a hybrid circuit with built-in optical touch function and AMOLED pixel driving display function.

[0050] The specific implementation of the present invention will be described in detail below with reference to the drawings and embodiments.

[0051] refer to figure 1 , figure 1 is a structural block diagram of an optical touch circuit according to an embodiment of the present invention. The optical touch circuit includes: a light emitting unit 101 , a light emitting control unit 102 , a touch signal generating unit 103 , a driving un...

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Abstract

The invention provides a touch driving circuit and a driving method thereof. The touch drive circuit includes: a data signal input unit, which sends data voltage; a touch signal generation unit, which generates a touch signal; a light emitting unit, which performs light display; a light control unit, which controls the light display of the light unit; a drive unit, which detects the touch signal The touch signal generated by the stage amplified touch signal generation unit drives the light emission control unit in the pixel drive display stage; the touch detection unit detects the touch signal amplified by the drive unit in the touch signal detection stage; and the threshold compensation unit detects the touch signal in the touch signal detection stage In the stage stage, the gate voltage of the driving unit is equal to the threshold voltage of the driving unit, and the data voltage sent by the data signal input unit is received, so that the gate voltage of the driving unit is equal to the sum of the data voltage and the threshold voltage; and in the pixel driving display stage , so that the current flowing through the drive unit remains constant.

Description

technical field [0001] The invention relates to the field of touch and display, in particular to a touch drive circuit and a drive method thereof. Background technique [0002] Touch screens are gaining more and more attention in the consumer electronics market. At present, the touch screen has been widely used in portable electronic products as a human-computer interaction interface, such as mobile phone screens, notebook computers, digital cameras, and the like. Touch screen technology can be divided into two categories: external type (external) and built-in type (in-cell). As the name suggests, the external touch screen is to place a touch device on the display. External touch screens have been widely used in mobile applications such as mobile phones. However, the external touch screen increases the cost of the touch display device and increases the thickness of the touch display device. Especially when the size of the touch display device becomes larger and larger, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233G09G3/3241
Inventor 周全国韦东梅祁小敬邓银吴博聂磊森
Owner BOE TECH GRP CO LTD
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