A piezoresistive detection substrate, display panel and display device
A piezoresistive detection and display panel technology, applied in the field of detection, can solve the problems of low precision of piezoresistive detection
Inactive Publication Date: 2019-08-27
BOE TECH GRP CO LTD
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Problems solved by technology
[0006] In view of this, an embodiment of the present invention provides a piezoresistive detection substrate, a display panel, and a display device to solve the existing problem of low precision of piezoresistive detection
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[0054] The specific implementation manners of the piezoresistive detection substrate, the display panel and the display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0055] The film thicknesses and area sizes and shapes of the various layers in the drawings do not reflect the true proportions of the array substrate or the color filter substrate, but are only intended to schematically illustrate the content of the present invention.
[0056] A piezoresistive detection substrate provided by an embodiment of the present invention, such as image 3 As shown, it includes: a base substrate 100, a plurality of piezoresistive detection circuits 200 arranged in the detection area A of the base substrate 100, a plurality of read signal lines Readline and a plurality of scan signal lines SEL; wherein,
[0057] Each piezoresistive detection circuit 200, such as Figure 4 Shown include: first tr...
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The invention discloses a piezoresistive detection substrate, a display panel and a display device. Each piezoresistive detection circuit includes: a first transistor, a second transistor, a fixed resistor and a piezoresistor; the first end of the fixed resistor and the first voltage signal The first terminal is connected to the first node, the second terminal is connected to the first node; the first terminal of the piezoresistor is connected to the first node, and the second terminal is grounded; the gate of the first transistor is connected to the first node, and the source is connected to the second voltage signal terminal The drain is connected to the source of the second transistor; the gate of the second transistor is connected to the scanning signal line, and the drain is connected to the reading signal line. When performing pressure sensitivity detection, by determining the change of the voltage signal read by the read signal line before and after the touch, the influence of the threshold voltage of the first transistor on the read voltage signal can be removed, so as to improve the detection accuracy. Moreover, the second transistor is turned on only during detection, so that the piezoresistive detection circuit is an active detection, which is not easily affected by leakage current, and can improve the sensitivity of pressure sensing detection.
Description
technical field [0001] The invention relates to the technical field of detection, in particular to a piezoresistive detection substrate, a display panel and a display device. Background technique [0002] The specific structure of the current piezoresistive array sensor is as follows: figure 1 As shown, it includes: a gate driver circuit (Gate Driver) arranged in the non-detection area to perform progressive scanning on multiple scanning signal lines in the detection area, and an analog circuit 01 (Analog Circuit) arranged in the non-detection area through multiple channels The distributor MUX executes signal conversion and reading for multiple reading signal lines in the detection area, and multiple piezoresistive detection circuits arranged in an array are arranged in the detection area. [0003] Specifically, the piezoresistive detection circuit such as figure 2 shown by a piezoresistive sensor P R , a selection switch TFT and a resistive voltage amplifier; piezoresis...
Claims
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IPC IPC(8): G06F3/041H01L27/32
CPCG06F3/0414H10K59/40H10K59/12G06F1/3262G06F3/0412G06F3/04166G06F3/04144
Inventor 郑智仁郭玉珍王鹏鹏丁小梁曹学友韩艳玲刘伟
Owner BOE TECH GRP CO LTD