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Pressure sensor and electronic equipment

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

Active Publication Date: 2021-08-24
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 sensor and electronic equipment
  • Pressure sensor and electronic equipment
  • Pressure sensor and electronic equipment

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0036] As described above, the pressure sensor can be disposed on the electronic device, for example, can be integrated into the display (for example, can be integrated in the center or edge of the display), or can be set on the border (eg, the left side border, right side border) , On the upper frame or lower border), or, may be disposed on the front or back surface of the electronic device. The application scenario integrated in the display is integrated in a pressure sensor as an example, but is not limited thereto.

[0037] When the pressure sensor is disposed at the display screen, the pressure sensor can be used as the pressure sensor of the electronic device, the pressure sensor can detect the electrical signal generated by the compression operation of the user input by the piezoresistive characteristics of the pressure sensitive, and the electronic device according to the electrical signal. A screenshot, photo, adjustment of the physical buttons, and other physical buttons...

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PUM

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Abstract

The invention discloses a pressure sensor and electronic equipment, relates to the technical field of touch control, and is used for reducing the influence of temperature on the detection accuracy of the pressure sensor. The pressure sensor comprises a Wheatstone bridge and a thermal emission diode; the Wheatstone bridge comprises a first resistor, a second resistor, a third resistor and a fourth resistor; the first resistor, the second resistor, the third resistor and the fourth resistor are coupled to form a loop; the first resistor, the second resistor and the third resistor are fixed value resistors, and the fourth resistor is a piezoresistor. The first output end of the Wheatstone bridge is coupled to the first end of the thermal emission diode, and the second output end of the Wheatstone bridge and the second end of the thermal emission diode are used for outputting electric signals; when the temperature rises, the equivalent resistance value of the thermal emission diode is reduced, and the resistance value of the fourth resistor is increased; when the temperature is reduced, the equivalent resistance value of the thermal emission diode is increased, and the resistance value of the fourth resistor is reduced.

Description

Technical field [0001] The present application embodiments relate to the field of touch, and more particularly to a pressure sensor and an electronic device. Background technique [0002] With the development of mobile equipment technology, integration will become a trend, which is very advantageous in waterproof and user experience. In order to achieve the integration of the mobile terminal, the electronic device can set the pressure sensor in a region where the physical button (also referred to as an entity button) is required, which can detect the pressing operation of the user input by the piezoresistive characteristics of the pressure sensitive resistance, thereby implementing Screen capture, taking pictures, adjust the specific functions of the physical buttons such as volume. Among them, this type of button that implements the button function can be referred to as a press-sensitive button. Alternatively, you can also be referred to as a virtual key (Virtual Key), because s...

Claims

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Application Information

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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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