Optical touch module

Abstract

The invention provides an optical touch module. A circuit board, a camera and an optical filter are arranged in a shell, the shell of the module is composed of an upper cover and a bottom shell, wherein the optical filer is arranged on the bottom shell, the circuit board is integrated in an installing groove in the bottom case, a USB (universal series bus) interface, an interconnection line interface and a fill-in light are welded at the bottom surface of the circuit board, and the other ends of the USB interface, the interconnection line interface and the fill-in light are arranged in the installing groove; the top surface of the circuit board and the side wall top of the bottom shell are in the same plane; the camera is arranged at the rear side of the fill-in light, and the fill-in light is connected with the optical filter at the front end of the fill-in light. The module shell is formed by casting aluminum alloy, has high strength, light-proof performance, and enables the working performance of the module to be more stable; the circuit board provided with the USB interface, the interconnection line interface and the fill-in light is integrated in the optical module; therefore, the fixing problem of the circuit board is solved, and the thickness of the module shell is thinner.

Description

technical field [0001] The invention relates to an optical module, in particular to an optical touch module. Background technique [0002] In the existing touch frame, the light is emitted by the LED lamp installed on the upper left corner of the top of the touch frame, and after being reflected by the surrounding reflective strips, it enters the camera of the upper right module. Similarly, the light emitted by the module LED in the upper right corner passes into the camera of the module in the upper left corner. The dense light forms a light network in the touch area. When a point is touched, the emitted light and received light at that point will form an included angle. At the same time, the cameras at both ends will form a straight line with the two light rays and the two cameras. Two included angles will be formed again, so that the exact coordinates of the point are entered by the controller to realize the touch response. [0003] like figure 1 As shown, in the exist...

AI Technical Summary

Problems solved by technology

[0004] However, since the left module, the right module, the main control board, the slave control board and the reflective strip all need to be installed independently, this leads to the disadvantages of cumbersome assembly and difficult debugging

In addition, in the above-mentioned touch frame, due to the relatively high requirements for the installation position of the module and the installation position between the module and the reflective strip, and the structure of the existing touch frame is not easy to accurately locate the installation position, once installed After completion, it is not convenient for later debugging

In addition, because the existing modules are processed by plastic injection molding, the shell strength is small, easy to deform, and easy to transmit light, resulting in unstable work

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