Light guide module of scanning device

Abstract

The invention relates to a light guide module of a scanning device. The light guide module comprises a plurality of lateral light emitting diodes arranged on a circuit board and a light guide column. The light guide column possesses a plurality of reflection structures corresponding to a plurality of lateral light emitting diodes. And reflections come from light beams of a plurality of lateral light emitting diodes. A first spacing between two lateral light emitting diodes located at a center is greater than a second spacing between another two lateral light emitting diodes located on two sides so that the light beams can be uniformly received by an optical sensing element on the scanning device.

Description

technical field [0001] The invention relates to a light guide module, in particular to a light guide module for guiding light beams in a scanning device. Background technique [0002] The main function of the scanning device is to capture images to convert the content of paper documents into electronic documents by scanning, so that users can spread, organize or save them. With the maturity of scanning device technology, scanning devices are becoming more and more popular. [0003] see figure 1 , which is a structural schematic diagram of an existing scanning device. The scanning device 1 includes a lower casing 10 and an upper casing 11. The lower casing 10 includes a glass platform 101 and a scanning module 102. The glass platform 101 is used to place documents P to be scanned, and the scanning module 102 is used for the following The document P is scanned while moving in the casing 10 . The upper casing 11 is used to cover the lower casing 10 to fix the document P in ...

AI Technical Summary

Problems solved by technology

For the optical sensing element 108, the optical sensing element 10 receives more light of the light beam L projected to the central area of ​​the document P, and receives less light of the light beam L projected to both ends of the document P, resulting in When scanning file P, both ends of file P are dark and affect the scanning quality

That is to say, the light beam L generated by the light guide module 105 has the problem of uneven light distribution, so that the optical sensing element 106 cannot uniformly receive the light beam L, resulting in low scanning quality of the scanning module 102. Therefore, a A light guide module that improves scanning quality and reduces the size of the scanning device

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