Pressure Sensors and Electronics
A pressure sensor and electronic equipment technology, applied in the field of sensors, can solve the problems of not releasing the hidden button, not responding to the user's pressing again, and outputting voltage difference, etc.
Active Publication Date: 2022-03-25
VIVO MOBILE COMM CO LTD
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Problems solved by technology
Since the resistivity of the pressure-sensitive adhesive resistor will change with temperature, when the smartphone is in a high-temperature or low-temperature environment for a long time, for example, the smartphone has been placed in the outdoor sunlight in summer, or the smartphone has been placed in the winter Outdoors at low temperature, after the user picks up the smartphone and presses the hidden button, although the user's finger has been lifted, due to the influence of the temperature effect, the pressure-sensitive rubber resistance of the hidden button will still generate and output a voltage difference, which will This causes the smartphone to think that the user has been pressing the hidden button, but has not released the hidden button, so that the smartphone shuts down or does not respond to the user pressing the hidden button again
Method used
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0020] figure 1 It is a schematic diagram of a composition structure of the pressure sensor in the embodiment of the present application, such as figure 1 As shown, the pressure sensor in the embodiment of the present application includes: a flexible printed circuit (Flexible Printed Circuit, FPC for short) 110 and a plurality of pressure-sensitive adhesive resistors, and a flexible printed circuit can be formed by printing a plurality of pressure-sensitive adhesives on th...
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The embodiment of the present application discloses a pressure sensor and electronic equipment, wherein the pressure sensor includes: a flexible circuit board and multiple pressure-sensitive adhesive resistors, and the multiple pressure-sensitive adhesive resistors include: pressure-sensitive adhesive resistors R1, R2, R3, R4, R5 and R6; the flexible circuit board includes opposite first and second surfaces; pressure-sensitive adhesive resistors R1, R3 and R5 are arranged on the first surface, and pressure-sensitive adhesive resistors R2, R4 and R6 are arranged on the second surface; A through hole connecting the first surface and the second surface is provided on the flexible circuit board, and the pressure-sensitive adhesive resistors R1, R2, R3, and R4 at least partially cover the through-hole; wherein, the pressure-sensitive adhesive resistors R1, R2, R5, and R6 are electrically connected to To form a first Wheatstone bridge, the pressure-sensitive adhesive resistors R3, R4, R5 and R6 are electrically connected to form a second Wheatstone bridge. The embodiment of the present application can compensate the signal generated by the pressure sensor due to the temperature effect, so as to ensure the measurement accuracy of the pressure sensor.
Description
technical field [0001] The present application relates to the technical field of sensors, in particular to a pressure sensor and electronic equipment. Background technique [0002] As people have higher and higher requirements for product appearance, more and more designs of hidden buttons appear on the flagship and high-end smartphones, among which the pressure sensor is the most common design scheme for hidden buttons. [0003] The design scheme of using the pressure sensor as a hidden button usually uses a pressure-sensitive rubber resistor to form a Wheatstone bridge to convert the received pressure into a voltage difference output. Since the resistivity of the pressure-sensitive adhesive resistor changes with the temperature, when the smartphone is in a high-temperature or low-temperature environment for a long time, for example, the smartphone has been placed in the outdoor sunlight in summer, or the smartphone has been placed in the winter Outdoors at low temperature...
Claims
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IPC IPC(8): G01L1/18
CPCG01L1/18G01L1/2262G01L1/26G01L1/2281G01L1/2287G01L5/22H05K1/0277H05K1/181H05K2201/09545H05K2201/10022H05K2201/10151
Inventor 陈伟
Owner VIVO MOBILE COMM CO LTD