Capacitive touch screen

Abstract

The embodiment of the invention discloses a capacitive touch screen comprising a PCB (Printed Circuit Board), a core board arranged at the inner side of the PCB and a nixie tube arranged at the outer side of the PCB, wherein the nixie tube is fixedly provided with ITO (Indium Tin Oxide) glass or ITO film. In the embodiment of the invention, the ITO glass or ITO film is embedded in the nixie tube, so that a good locating effect is achieved, and the ITO glass or film can be favorably protected from being damaged. Poor conditions caused during assembly can be prevented. The ITO glass or ITO film is embedded in the nixie tube, therefore, no influences from product structural errors and assembly difference exist, the operation function of a touch key is kept well, and the condition of malfunction cannot be caused.

Description

technical field [0001] The present invention relates to the field of electronic equipment manufacturing, and more specifically, relates to a capacitive touch screen. Background technique [0002] The structure of the capacitive touch screen is mainly to coat a transparent film body layer on the glass screen, and then add a protective glass outside the conductor layer. The double glass design can completely protect the conductor layer and the sensor. [0003] The capacitive touch screen is plated with long and narrow electrodes on the four sides of the touch screen, forming a low-voltage AC electric field in the conductor. When touching the screen, due to the electric field of the human body, a coupling capacitance will be formed between the finger and the conductor layer, and the current from the electrodes on the four sides will flow to the contacts, and the current strength is proportional to the distance from the finger to the electrode. The controller behind the touch sc...

AI Technical Summary

Problems solved by technology

[0004] The existing capacitive digital tube touch screen uses PE film on the digital tube, and leads such as FPC or FFC on the PE film. Because the PE film is very thin, the film is thin and there are leads such as FPC or FFC in the product assembly. It is easy to be damaged during the process, and because the PE film is not easy to fix on the digital tube, and because the film is thin and attached to the digital tube, it will be uneven. This kind of structure will also be affected by the error of the product structure and the difference in assembly, which will cause touch buttons malfunction or failure

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