Light sensation type touch device and drive method thereof

A technology of a touch device and a driving method, which is applied in the direction of instruments, electrical digital data processing, and input/output process of data processing, etc., which can solve problems such as error-prone, misjudgment, and offset, and overcome leakage current-bias Curve offset problem, the effect of whether the touch is accurate

Inactive Publication Date: 2012-02-22
AU OPTRONICS CORP
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  • Abstract
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Problems solved by technology

[0004] However, when the photosensitive element is pressed or irradiated for a long time, its leakage current-bias curve will shift, that is, it will shift to the negative direction of the bias voltage
However, even if the photosensitive element is touched, because its leakage current-bias curve has shifted, subsequent judgments on whether the photosensitive element is touched are prone to errors, that is, a misjudgment problem occurs.

Method used

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  • Light sensation type touch device and drive method thereof
  • Light sensation type touch device and drive method thereof
  • Light sensation type touch device and drive method thereof

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Embodiment Construction

[0023] The embodiments of the present invention will be clearly explained below with the accompanying drawings and detailed description. For the sake of simplifying the accompanying drawings, some known and commonly used structures and components will be shown in a simple and schematic manner in the accompanying drawings.

[0024] refer to figure 1 , figure 1 A schematic diagram of a photosensitive touch device according to an embodiment of the present invention is shown.

[0025] Such as figure 1 As shown, the photosensitive touch device 100 includes: a photosensitive unit 110 , an energy storage unit 120 and a readout unit 130 . The light sensing unit 110 is used to generate a photocurrent according to an input light signal and a driving voltage; the energy storage unit 120 is coupled to the light sensing unit 110, and the energy storage unit 120 can be used when the light sensing unit 110 generates a photocurrent, The stored charge is discharged to the photosensitive uni...

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Abstract

The invention provides a light sensation type touch device and a drive method thereof. The drive method comprises the step of: defining a scheduled period, wherein the scheduled period comprises a sensation period and an updating period, a first drive voltage is provided to the light sensation type touch device in the sensation period, and a second drive voltage is provided to the light sensation touch type touch device in the updating period. The light sensation type touch device and the drive method provided by the invention are used for correction deviation of a light sensation type film crystal in the updating period, thereby overcoming the problem of deviation of a leakage current-bias voltage curve and further ensuring that whether the light sensation type touch device is more accurately touched.

Description

technical field [0001] The invention relates to a display, in particular to a photosensitive touch device in the display and a driving method thereof. Background technique [0002] In recent years, electronic products with panel input mechanisms have become a popular product trend. Using input displays as the communication interface between users and electronic products allows users to directly control the operation of electronic products through the display instead of the keyboard. Or mouse, such as resistive touch panel display, capacitive touch panel display, optical touch panel display. [0003] For the light-sensitive touch panel display, there is also a light-sensing element, such as a light-sensing transistor, and its principle is to use the difference in leakage current of the light-sensing element caused by different light intensities to perform touch judgment. For example, when touched by a finger, illuminated by ambient light and touched by a light pen, the leaka...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 锺岳宏徐雅玲黄雪瑛
Owner AU OPTRONICS CORP
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