Optical touch screen

An optical touch screen and optical reflection technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problems of reducing the touch experience, reducing the service life of the touch screen, and large damage to the touch screen, so as to improve the touch Experience, Change Sensitivity, Improve Sensitivity Effects

Active Publication Date: 2013-04-03
TOP TOUCH ELECTRONICS
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Problems solved by technology

[0005] However, only when the touch point is touched so that the transmission direction of the infrared ray deviates from the original transmission direction reaches the degree that the detection control circuit can recognize (the infrared light emitted by the infrared emitting tube has only a very small part of the incident to the corresponding infrared receiver. tube or cannot be incident on the infrared receiving tube at all), and the touch action can be recognized. The struc

Method used

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  • Optical touch screen
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[0019] The present invention will be further explained below in conjunction with the drawings and embodiments:

[0020] Please refer to figure 1 with figure 2 The optical touch screen of the present invention includes an optical reflector 100, a display screen 500, a detection control circuit (not shown in the figure), and at least a pair of optical transmitter heads 110 and optical receiver heads 120. The optical reflector plate 100 is arranged on the display screen. 500 above, where the optical transmitter 110 in each pair is set on one side of the optical reflector 100 at an angle at which incident light can be totally reflected inside the optical reflector 100, and the corresponding optical receiver 120 in each pair is The angle at which the incident light (after being reflected by the optical reflector 100) can be received is set on the other side of the optical reflector 100 opposite to the one side, the detection control circuit and each pair of optical transmitters 110 ...

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Abstract

The invention provides an optical touch screen. The optical touch screen comprises an optical reflecting plate, a display screen, a detection control circuit and at least one pair of optical transmitting head and optical receiving head, wherein the optical reflecting plate is arranged above the display screen; the optical transmitting head in each pair is arranged on one side of the optical reflecting plate according to an angle at which incident light can be fully reflected inside the optical reflecting plate; the optical receiving head in each pair is arranged on the opposite side of the optical reflecting plate according to an angle at which the incident light can be received; and the detection control circuit is connected with each pair of optical transmitting head and optical receiving head and is used for detecting light change between each pair of optical transmitting head and optical receiving head. The optical touch screen can achieve more sensitive touch detection and improves the touch experience of a user; anti-jamming anti-dust performance of the optical transmitting head and the optical receiving head is effectively improved; and the service life of the optical touch screen is greatly prolonged.

Description

[0001] technical field [0002] The invention relates to the field of touch screens, in particular to an optical touch screen using light for positioning. [0003] Background technique [0004] The infrared touch screen uses the dense infrared matrix in the X and Y directions to detect and locate the user's touch. The infrared touch screen installs a circuit board frame in front of the display, and the circuit board is arranged on the four sides of the screen with one-to-one corresponding infrared emitting tubes and infrared receiving tubes, correspondingly forming a horizontal and vertical crossing infrared matrix. When the user touches the screen, the finger will block the horizontal and vertical infrared rays passing through the position, and the detection control circuit will detect the loss of light, and then confirm the X-axis and Y-axis coordinates of the touch point to determine the touch point position on the screen. [0005] However, only when the touch point is...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 毛肖林
Owner TOP TOUCH ELECTRONICS
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