Touch pressure detection apparatus, display screen and touch electronic device

Abstract

The invention relates to the technical field of communications and discloses a touch pressure detection apparatus. The pressure detection apparatus comprises a stressed plate, a sensor film and a stress bearing plate located between the stressed plate and the sensor film, wherein force coupling is realized between the stressed plate and the stress bearing plate; force coupling is realized between the stress bearing plate and the sensor film; a plurality of sensor units are distributed in array on the sensor film; each sensor unit comprises a first resistor, a second resistor, a third resistor and a fourth resistor; the four resistors match to form a Whist electric bridge; the first resistor is connected in series with the third resistor; the second resistor is connected in series with the fourth resistor; two serial circuits are connected in parallel; the stress bearing plate is provided with an opening that runs through the thickness of the stress bearing plate; and in each sensor unit, the second resistor and the third resistor correspond to regions in the opening of the stress bearing plate, and the first resistor and the fourth resistor correspond to regions outside the opening of the stress bearing plate. The pressure detection apparatus is improved in both sensitivity and accuracy.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a pressure detection device, a display screen and a touch electronic device of a touch mobile terminal. Background technique [0002] In order to improve user interaction with mobile terminal devices such as mobile phones, watches, and wearable devices, pressure detection devices have been widely used in components such as touch screens and housings to identify the user's touch position and pressure, such as pressure sensors. Existing pressure detection devices use the deformation of the detection structure to achieve pressure detection, but the structural deformation generated by the user when operating the terminal equipment is very small, so higher requirements are put forward for the detection accuracy and sensitivity of the pressure detection device. [0003] In the prior art, a relatively commonly used pressure detection device is a capacitive pressure sensor, but to...

AI Technical Summary

Problems solved by technology

Existing pressure detection devices use the deformation of the detection structure to achieve pressure detection, but the structural deformation generated by the user when operating the terminal equipment is very small, so higher requirements are put forward for the detection accuracy and sensitivity of the pressure detection device

[0003] In the prior art, a commonly used pressure detection device is a capacitive pressure sensor, but to ensure its detection accuracy and sensitivity, the distance between the electrodes is required to be large enough, resulting in an increase in the thickness of the terminal equipment, and the gap between the capacitors The electrical constant is easily affected by temperature and humidity, which will cause detection errors and make the detection accuracy and sensitivity of the pressure detection device lower

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