Light source projection device for scanning module and light source arraying method thereof
A technology for scanning modules and light source projection, which is applied in the field of light source projection devices and light source arrangement methods, and can solve problems such as image distortion and inability to improve the signal/noise ratio
Inactive Publication Date: 2009-12-16
TECO IMAGE SYST
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[0005] However, this method cannot improve the signal / noise ratio. After the brightness at both ends is compensated and amplified by the firmware (F / W), the noise will also be amplified. The problem of image distortion is generated. It can be seen from this that how to improve the light source projection structure of the scanning module so that the photosensitive component receives light evenly is a subject that the inventors of the present invention and those in the technical field engaged in this related industry want to improve urgently.
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[0040] Please refer to image 3 , Figure 4 , Figure 5 , Figure 6A and Figure 6B , Is a light source projection device of a scanning module disclosed in the present invention, image 3 Is a three-dimensional schematic diagram of the light source projection device, Figure 4 Is a schematic plan view of the light source projection device, Figure 5 To be applied to the structural diagram of the scanning module, Figure 6A It is the brightness curve diagram of the light source projection device of the general light source (such as CCFL lamp tube), Figure 6B It is the brightness curve diagram of the projection device of the LED light source (this embodiment).
[0041] The light source projection device 60 of the scanning module includes a substrate 61 and a plurality of light emitting diodes 62.
[0042] The substrate 61 is generally elongated and includes a first end 61a, a second end 61b, and a middle section 61c. The first end 61a and the second end 61b are respectively located...
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The invention relates to a light source projection device for a scanning module and a light source arraying method thereof. The light source projection device comprises a substrate and a plurality of light emitting diodes, wherein the substrate comprises a first end, a second end and a middle section, the first end and the second end are respectively positioned at two sides of the middle section, the light emitting diodes are positioned on the substrate, an array gap is formed between each two adjacent light emitting diodes, and the array gaps gradually decrease respectively from the middle section to the first end and the second end.
Description
Technical field [0001] The invention relates to a light source projection device and a light source arrangement method thereof, in particular to a light source projection device of a scanning module and a light source arrangement method thereof. Background technique [0002] With the advancement of technology, optical scanners have become increasingly popular computer peripheral devices. The optical scanner captures images mainly by illuminating the light on the document to be scanned by a light-emitting device. After the light is reflected by the document to be scanned, the light is guided to the photosensitive component by the lens group, and the photosensitive component can detect different areas on the document. Reflects light of different intensities, converts the reflected light waves into digital data, and then reads in the data with scanning software and reassembles them into computer image files. [0003] See figure 1 versus figure 2 As shown, the ideal light-emitting ...
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IPC IPC(8): F21S8/00F21V19/00G06K7/10F21Y101/02F21Y103/10F21Y115/10
Inventor 陈三塘
Owner TECO IMAGE SYST