Optical touch control device and touch control display device

Abstract

The invention relates to the field of touch control, and discloses an optical touch control device and a touch control display device. The optical touch control device comprises a light guide plate, and at least one pair of light emitting unit and light receiving unit. The light guide plate comprises a first full-reflection surface and a second full-reflection surface in opposite. The light emitting units and the light receiving units are located on the side, away from the second full-reflection surface, of the first full-reflection surface of the light guide plate and arranged at least one pair of opposite edges of the first full-reflection surface. For each pair of light emitting unit and light receiving unit, the light emitting unit is arranged on one of the pair of edges, and the light receiving unit is arranged on the other edge. The light guide plate is located in the lateral surface between the first full-reflection surface and the second full-reflection surface. The include angles between the lateral surface corresponding to the edges with the light emitting units and the first full-reflection surface as well as between the lateral surface corresponding to the edges with the light receiving units and the first full-reflection surface are acute angles. The solar energy utilization efficiency of the optical touch control device is high.

Description

technical field [0001] The present invention relates to the field of touch technology, in particular to an optical touch device and a touch display device. Background technique [0002] With the continuous improvement of people's demand for visual and operational convenience, and the continuous maturity of new technologies, more and more products are beginning to use touch panels to emphasize its simple man-machine operation, so the application of touch panels The level will become wider and wider, not only limited to small and medium-sized applications, but also large-scale applications will also develop rapidly. The electronic whiteboard (IWB) used in the education field and the digital signage (Digital Signage) used in daily life have greatly enriched the interaction between man and machine and promoted the development of large-size touch panels. [0003] The structure of the existing total reflection optical touch device is as follows: figure 1 As shown, the circuit bo...

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Problems solved by technology

[0003] The structure of the existing total reflection optical touch device is as follows: figure 1 As shown, the circuit board 31 of the light-emitting unit 3 is provided with a light-emitting unit 32, and the circuit board 41 of the light-receiving unit 4 is provided with a photosensitive unit 42, and the circuit boards of the light-emitting unit 3 and the light-receiving unit 4 are pasted on the On the light guide plate 10, a prism film 6 is provided at the position of the light guide plate 10 corresponding to the light receiving unit 4 and the light emitting unit 3, which plays the role of diffusing light, so that more light enters the light guide plate 10 and undergoes total reflection. However, Even if the prism film 6 is added to the structure of the existing optical touch device, the light utilization rate is only about 10%, and the light energy utilization rate is very low.

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