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Touch display device and method for obtaining touch signal

A touch display and device technology, applied in the field of light-emitting diode-based display devices, can solve the problems of limited product design, cumbersome process, complex structure, etc., to increase practicability and portability, simplify production process, reduce The effect of production cost

Active Publication Date: 2022-02-11
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the existing touch display device such as complex structure, cumbersome process, and limited product design, the present invention proposes a touch display device and a method for obtaining a touch signal

Method used

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  • Touch display device and method for obtaining touch signal
  • Touch display device and method for obtaining touch signal
  • Touch display device and method for obtaining touch signal

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Embodiment Construction

[0017] Next, the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.

[0018] Firstly, a specific implementation manner of the touch display device of the present invention is given with reference to the accompanying drawings.

[0019] attached figure 1 Shown is a schematic structural view of the touch display device in this specific embodiment, including a pixel unit 10 . The first light emitting diode 11 , the second light emitting diode 12 , the pixel driving circuit 13 , and the readout circuit 14 are arranged in the pixel unit 10 . An integral comparison circuit 19 is also included. The touch display device may include a plurality of pixel units, and each pixel unit may be provided with an integral comparison circuit correspondingly.

[0020] In the following description, unless otherwise specified, the source and drain of the transistor are interchangeable.

[0021] In the working state, the fi...

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PUM

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Abstract

A touch display device, comprising at least one pixel unit, the pixel unit comprising: a pixel driving circuit; and a first light emitting diode connected to the pixel circuit, working under a forward bias voltage, for emitting light; further comprising : the second light-emitting diode, working under reverse bias, the ambient light will change when the pixel unit is touched, and the current of the second light-emitting diode will change accordingly; and the readout circuit, connected with the second The light emitting diode is connected, and the current change of the second light emitting diode is read as a criterion for judging whether the pixel unit is touched.

Description

technical field [0001] The invention belongs to the field of display technology, in particular to a display device and a display method based on light emitting diodes. Background technique [0002] With the development of touch display technology, display screens configured with touch operations have been widely used in various mobile terminal devices. Touch screen technology has become the most accepted computer information input method after keyboard, mouse, tablet and voice input. The invention and development of touch technology makes human-computer interaction more convenient and faster, and greatly improves people's quality of life. [0003] At present, common touch technologies include resistive, acoustic wave, capacitive, infrared and other methods. For example, the touch technologies used in small-sized display devices such as mobile phones and tablets are mostly capacitive technologies. However, the above method needs to integrate a touch panel on the display dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041
Inventor 郭小军黄钰坤邱实陈苏杰许兴华
Owner SHANGHAI JIAOTONG UNIV