Touch positioning method and device, touch screen and display

Abstract

The invention relates to a touch positioning method and device, a touch screen and a display. The method comprises the following steps of: acquiring image data acquired by at least two pieces of imaging equipment, wherein two adjacent frames of image data acquired by each imaging equipment comprise first image data and second image data, the brightness of the first image data is greater than that of the second image data, the first image data comprises a first dark image block, the second image data comprises a second dark image block, the first dark image block and the second dark image block are formed by light reflected by a first region of a retro-reflective strip, the first region comprises a region with the minimum reflection efficiency on the retro-reflective strip, and the second dark image block in the second image data is replaced by the first dark image block to acquire new second image data; and acquiring positional information of a touch object according to the new second image data of at least two imaging equipment. According to the method and the device, the brightness uniformity of the image data acquired by the imaging equipment can be improved, so that the accuracy of detecting the touch object by the touch screen is improved.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a touch positioning method and device, a touch screen and a display. Background technique [0002] With the popularization of computer technology, a new human-computer interaction technology—touch screen technology emerged in the early 1990s. With this technology, the user can operate the computer as long as he gently touches the graphics or text on the computer display screen, thus getting rid of the shackles of the keyboard and mouse, which greatly facilitates the user. [0003] The touch screen with camera is a kind of touch screen that collects the image data of the touch object through the camera, and then transmits the image data to the processing unit for processing, so as to detect the position information of the touch object. Wherein, the accuracy of the detected position information of the touch object is closely related to the quality of the image data collect...

AI Technical Summary

Problems solved by technology

But, the inventor finds in the process of researching the utility model, along with the incident angle and the distance of the light that infrared light sources 12 and 13 emit to the retro-reflective strip 11 increase, the reflection efficiency of the retro-reflective strip 11 decreases, and the retro-reflective The light reflected by the strip 11 back to the infrared cameras 9 and 10 will decrease, resulting in uneven brightness of the image data collected by the infrared cameras 9 and 10, wherein the reflection efficiency on the retro-reflective strip 11 in the image data collected by the infrared cameras 9 and 10 The brightness of the image block formed by the light reflected in the lower area is small, and the brightness of the image block formed by the light reflected by the area with higher reflection efficiency on the regression emission strip 11 is larger. When the image data detects the touch object, if the image of the touch object is located in the image data on the image block formed by the light reflected by the area with low reflection efficiency on the retro-reflective strip 11, the touch screen will not be able to recognize the touch object, thereby reducing the touch screen detection. The accuracy of the touch object, where the incident angle refers to the angle between the light emitted by the infrared light source 12 to the retro-reflective strip 11 and the normal line of the surface of the retro-reflective strip 11

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