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Pressure Sensors and Electronics

A technology of pressure sensors and resistors, applied in the field of touch control, can solve the problems of low accuracy of pressure sensors and no consideration of temperature, etc.

Active Publication Date: 2022-08-05
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the influence of temperature on the resistance of the piezoresistor is particularly significant
In the above scheme, the influence of temperature on the piezoresistor is not considered, which makes the detection accuracy of the pressure sensor low.

Method used

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  • Pressure Sensors and Electronics
  • Pressure Sensors and Electronics
  • Pressure Sensors and Electronics

Examples

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Embodiment Construction

[0036] As mentioned above, the pressure sensor can be arranged on the electronic device, for example, it can be integrated in the display screen (for example, it can be integrated in the center or edge of the display screen), or it can be arranged on the frame (for example, the left frame, the right frame , the upper frame or the lower frame), or can be arranged on the front or back of the electronic device. This application takes an application scenario where a pressure sensor is integrated in a display screen as an example, but it is not intended to be limited to this.

[0037] When the pressure sensor is arranged on the display screen, the pressure sensor can be used as a pressure-sensitive button of the electronic device. The pressure sensor can use the piezoresistive characteristics of the piezoresistor to detect the electrical signal generated by the pressing operation input by the user. It can realize the related functions of physical buttons such as screenshots, photos...

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Abstract

The application discloses a pressure sensor and an electronic device, which relate to the technical field of touch control and are used to reduce the influence of temperature on the detection accuracy of the pressure sensor. Pressure sensor, including: Wheatstone bridge and heat emitting diode, Wheatstone bridge including first resistor, second resistor, third resistor and fourth resistor, first resistor, second resistor, third resistor and fourth resistor The coupling forms a loop, wherein the first resistor, the second resistor and the third resistor are fixed-value resistors, and the fourth resistor is a varistor. The first output end of the Wheatstone bridge is coupled to the first end of the heat emitting diode, and the second output end of the Wheatstone bridge and the second end of the heat emitting diode are used for outputting electrical signals; when the temperature increases, the heat The equivalent resistance value of the emitting diode decreases, and the resistance value of the fourth resistor increases; when the temperature decreases, the equivalent resistance value of the heat emitting diode increases, and the resistance value of the fourth resistor decreases.

Description

technical field [0001] The embodiments of the present application relate to the field of touch technology, and in particular, to a pressure sensor and an electronic device. Background technique [0002] With the development of mobile device technology, integration will become a trend, which has great advantages in waterproof and user experience. In order to realize the integration of mobile terminals, the electronic device can set a pressure sensor in the area where physical keys (also called physical keys) need to be set. Specific functions of physical buttons such as screenshots, photos, and volume adjustments. Among them, such keys that utilize the piezoresistive characteristics of piezoresistors to realize key functions may be called pressure-sensitive keys. Alternatively, because such keys are not visible in the appearance of the electronic device, such keys may be called virtual keys or the like. [0003] The pressure sensor in the electronic device uses the varisto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/02G01L1/22G01L1/18H04M1/72454
CPCH04M1/026H04M1/0266G01L1/2262G01L1/22G01L1/18H04M2250/12G01L1/2281G01L9/0054G01L9/065
Inventor 安亚斌贺海明赵明远
Owner HONOR DEVICE CO LTD
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