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Light source module for scanning instrument

A technology of a light source module and a scanner, which is applied in the direction of image communication, electrical components, etc., and can solve the problems of affecting the quality of light emitting elements, reducing the quality of light emitting elements, and the inability of precise positioning of light emitting elements 200, etc.

Inactive Publication Date: 2004-01-21
UMAX DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the light-emitting element 200 is soldered to the printed circuit board 310, since the light-emitting element 200 and the printed circuit board 310 are only fixed by solder joints, it is easy for the light-emitting element 200 to be offset or uneven in height, resulting in the inability to accurately position the light-emitting element 200 on the printed circuit board 310
In addition, when the temperature is too high during soldering, it will also affect the quality of the light emitting element 200, and reduce the quality of the light emitting element.

Method used

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  • Light source module for scanning instrument
  • Light source module for scanning instrument
  • Light source module for scanning instrument

Examples

Experimental program
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Embodiment Construction

[0051] first preferred embodiment

[0052] Please refer to Figure 4A , which is a cross-sectional view of a light emitting element in the first preferred embodiment of the present invention. Also refer to Figure 2A In this embodiment, a positioning piece 414 is added to the bottom of the light-emitting element 400, and the depth of the positioning piece should be sufficient to match the printed circuit board. In addition, the light-emitting element 400 also has a light-emitting chip 402 , a base 408 , a set of terminals 406 , an encapsulant 404 and a set of bonding wires 410 , which will not be described in detail here. Please refer to Figure 4B , which is based on Figure 4A A schematic diagram of the bottom of a light-emitting element, the positioning member 414 is in the shape of a cylinder, and can be integrally formed with the encapsulant 404 . In order to make the light-emitting element have a better positioning, two positioning parts can be arranged at the bot...

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Abstract

The light source module for scanning instrument consists of mainly one printed circuit board and several light emitting elements, the printed circuit board has several electrodes and several through holes in the areas between two electrodes, and the light emitting element has one sets of terminals on its two ends and at least one positioning part in the bottom. The light emitting elements are configured on the printed circuit board, and their terminals are connected to the electrodes electrically. The light emitting elements are positioned on the printed circuit board precisely via the matched positioning part and the through holes.

Description

technical field [0001] The invention relates to a light source module of a scanner, and in particular to a light source design in the light source module. Background technique [0002] With the improvement of computer performance and the popularity of the Internet, image scanners (Scanners) have become an indispensable standard equipment for personal computers. For a commonly used flatbed scanner, it generally includes a light source module, an optical system, and an image sensor. The reflected light or transmitted light formed by the light source module on the document can be imaged by the optical system. projected onto the image sensor. The light source module, the optical system and the image sensor are arranged in a scanning module, and the scanning module is driven by a driving motor, so that the scanning module moves on a document for scanning. [0003] Please refer to figure 1 , which is a schematic diagram of a scanning module of a known scanner. A scanning modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/024
Inventor 许秀娥
Owner UMAX DATA SYST