Infrared touch glass mounting structure, touch precision adjusting method and application

Abstract

The invention discloses an infrared touch glass mounting structure. An infrared transmitting tube and an infrared receiving tube are respectively adhered to the periphery of the front surface of the glass reference plate; the touch effect can be adjusted during pasting; after the warping surface of the glass reference plate is measured, sand blasting etching processing is performed on the back surface of the warped surface, and finally chemical strengthening is performed, the warping degree of the glass can be corrected; the heights of all the infrared transmitting tubes and all the infrared receiving tubes of the infrared geminate transistors on the glass reference plane are further ensured to be the same; the infrared emission light path and the infrared receiving light path are both located in an infrared light channel of the infrared filtering strip, so that the touch height of the infrared touch control glass is equal to the radius of the infrared emission tube and the radius of the infrared receiving tube, and the touch control sensitivity is improved; the infrared touch screen and the back plate of the backlight module are attached to the screen supporting frame, and full sealing of the infrared touch liquid crystal display module is achieved.

Description

technical field [0001] The invention relates to the field of infrared touch display devices, in particular to a high-precision infrared touch screen installation structure, an infrared touch glass installation structure, a touch precision adjustment method and its application. Background technique [0002] The installation structure of the infrared touch components in the traditional infrared touch all-in-one machine is shown in the frame structure of an infrared touch display device disclosed in Chinese Patent No. 201020679896.8. The infrared emitting / receiving tube group is vertically welded and fixed on the corresponding printed circuit On the board, the frame is provided with an opening channel for emitting and receiving infrared rays, the printed circuit board is perpendicular to the opening direction of the opening channel of the frame and embedded in the aluminum frame groove around the periphery, and each emission of the infrared emitting / receiving tube group The tub...

AI Technical Summary

Problems solved by technology

[0003] 1. During the combination process of the surrounding frame, there will be a difference in combination twist angle, and the tightness of the printed circuit board of the infrared light bar will also produce a difference in accuracy when inserted into the aluminum frame groove. Too tight will make it difficult to insert, and too loose will cause the screen to vibrate. The infrared signal jitters;

[0004] 2. Before the external composite aluminum frame is not embedded in the glass of the touch screen, hands cannot touch it, and cannot know or adjust the touch effect

However, it is difficult to adjust after the touch screen glass is embedded because the infrared light bar has been inserted into the combined external aluminum frame, which makes it difficult and time-consuming to adjust the touch effect of the infrared touch screen during mass production and maintenance, and every time The effect of one touch is not the same, and the assembly consistency is poor;

[0005] 3. The plug-in structure of the light-transmitting dust-proof strip and the frame also leads to poor sealing of the light-transmitting dust-proof strip, and it is easy to leak water and dust, thus causing the lamp head of the infrared emitting / receiving tube to be easily fogged and dusty, and the printed circuit board is easily short-circuited when it is damp. In addition, the presence of the bottom edge of the infrared filter slot also increases the thickness of the main frame. The higher the vertical height between the horizontal optical axis and the touch glass, the worse the touch sensitivity and inaccuracy. Hysteresis

[0006] Since the optical axes of the emitting light path and receiving light path of the infrared pair tubes currently on the market are difficult to be on the plane horizontal optical axis, and the height from the touch glass is also higher than the vertical height distance of the capacitive screen, resulting in tactile or fast Or slow, the touch is not smooth; and when the capacitive touch touches any surface of the capacitive touch glass, the distance between the finger and the capacitive sensing film line attached to the glass is the same, and the response time of the touch sensing is fast and unanimous

Therefore, although the traditional infrared touch module is cheaper than the capacitive touch screen, there is still a big gap between the sensitivity and the capacitive touch screen.

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