Touch display and method for determining positions of touch points

Abstract

The invention relates to a touch display and a method for determining positions of touch points. The touch display comprises a fixed body and a deflector, wherein at least three resistance-type angular transducers are arranged between the fixed body and the deflector and generate current variations along with the deflection generated by the touched deflector; the resistance-type angular transducers are connected with a data processing device; the data processing device is used for acquiring position coordinates of the touch points according to the current variations of the resistance-type angular transducers; the fixed body is a backlight source; and the deflector is a display screen. By organically combining material mechanics with principles of electricity, compared with the built-in or external touch displays, the touch display of the invention has the advantages of simple structure, convenient installation, low manufacturing cost and the like, and has wide application prospects.

Description

Technical field [0001] The invention relates to a flat panel display, in particular to a touch display and a method for determining the position of a touch point. Background technique [0002] Currently, there are many types of touch displays in the prior art. According to the working principle, it mainly includes three types: inductive, capacitive and resistive. According to the structure, it mainly includes two types: external type and built-in type. But whether it is external or internal, its working principle is still limited to three types: inductive, capacitive and resistive. The resistive type is controlled by pressure sensing. By setting two conductive layers, the two conductive layers touch at the touch point position when the finger is touched, the resistance changes, and the touch point position is obtained from the resistance change. The capacitive type uses the current induction of the human body by setting a conductive layer and leads four electrodes on the four c...

AI Technical Summary

Problems solved by technology

[0003] The external touch display is made by superimposing the display screen for display and the touch screen for sensing the coordinates of the touch point, which not only makes the touch display relatively thick, but also makes the refraction effect easily exist due to the thickness of the touch screen superimposed on the upper layer. What you touch is not what you get, and there are also defects such as brightness drop or blurred display

The built-in touch display is to add sensing elements to the pixel area inside the display to realize the perception of the coordinates of the touch point. Although it solves the defects of the external touch display such as thickness and brightness reduction to a certain extent, it increases the internal structure of the display. The complexity, on the one hand, increases the difficulty of the production process of the display screen, and on the other hand, reduces the yield

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