Optical touch module

A touch module, optical technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problems affecting the accuracy of light intensity changes of optical sensors, light reflection leakage, optical In order to improve the efficiency of light use, improve accuracy, and prevent light leakage, it can solve problems such as touch failure of the type touch module.
CN101907958AInactive Publication Date: 2010-12-08QISDA SUZHOU +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QISDA SUZHOU
Publication Date
2010-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an optical touch module, comprising a touch surface, a substrate, at least one optical sensor, a light guide structure, an elastic element and a light emitting unit. The touch surface is positioned on the substrate, the optical sensor captures the image of a touch zone towards the touch surface; the light guide structure is arranged along one side of the touch surface to guide light into the touch surface. The elastic element is arranged at one end part of the light guide structure. The light emitting unit is arranged between the light guide structure and the elastic element, and is butted against the elastic element to allow the light exit surface of the light emitting unit to be closely adjacent to the light incoming surface of the light guide structure substantially. Therefore, the optical touch module provided by the invention can solve the problem that gaps appear between the light emitting unit and the light guide structure due to that the light guide structure has structural distortion caused by expansion on heating and contraction on cooling under different use environments, provides good assembling effect and effectively eliminate light leakage problem.
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Description

technical field

[0001] The present invention relates to an optical touch module, in particular to a device that utilizes the elastic force provided by the elastic member to make the light-emitting unit close to the light guide structure and uses a light-shielding structure to block the light reflected from the light guide structure. Optical touch module. Background technique

[0002] Generally speaking, the optical touch module uses the light receiving and blocking principle to detect the relative position of the finger or stylus on the touch surface. Its components include a substrate, a light-emitting unit, an optical sensor, and a guide. The common configuration of the light structure is that the light guide structure is arranged along the side of the touch surface on the substrate, the light emitting unit is arranged on the substrate corresponding to the light incident surface of the light guide structure, and the optical sensor It is arranged at the position correspond...

Claims

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