Display device with pressure sensing function

Abstract

The invention discloses a display device, which comprises a display module and a pressure sensing module, wherein the pressure sensing module comprises a reference electrode, a first insulating layer, a first sensing electrode, a second insulating layer and a second sensing electrode which are sequentially stacked; the display module comprises an electric conductor; the reference electrode is any electric conductor in the display module; the first insulating layer and the second insulating layer both have elasticity; the first insulating layer comprises a plurality of bumps which are arranged at intervals; a gap is formed in the position, corresponding to each bump, of the second insulating layer; the reference electrode, the first insulating layer and the first sensing electrode are matched to form a first capacitor; the first sensing electrode, the second insulating layer and the second sensing electrode are matched to form a second capacitor; and the display device carries out pressure sensing according to changes of capacitance values of the first capacitor and the second capacitor.

Description

technical field [0001] The present invention relates to a display device, in particular to a display device with a pressure sensing function. Background technique [0002] In recent years, the pressure sensing function has been widely used in the display field. The display device will integrate the pressure sensing function to sense the pressure of human touch to realize a specific function (such as the Home button of a mobile phone). The pressure sensing function is usually realized by integrating a capacitive structure in the display device. When a human finger presses, the distance between the sensing electrodes of the capacitive structure changes, resulting in a change in capacitance to generate a corresponding electrical signal. In the prior art, air is usually used as the medium between the sensing electrodes. However, in the actual manufacturing process, the existence of assembly tolerances will cause the actual distance between the capacitive sensing electrodes to be...

AI Technical Summary

Problems solved by technology

[0005] The display device of the present invention uses an elastic insulating layer as the dielectric layer of the capacitor to ensure the size of the distance between the sensing electrode and the reference electrode, and effectively solve the pressure sensing caused by the small distance between the sensing electrode and the reference electrode due to assembly tolerances. The problem of reduced sensitivity; at the same time, a dual-capacitor series sensing structure is adopted, and the first insulating layer with bumps and the second insulating layer with gaps cooperate with each other to further improve the sensitivity of pressure sensing

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