High brightness touch-type image sensor

Abstract

The invention discloses a high illuminance contact type image sensor, which comprises a sensor base plate, sensitizing components arranged on the sensor base plate in line; lenses disposed on the sensitizing components on the sensor base plate, light sources disposed on one side of the lens, a frame capable of containing the sensor base plate, the lenses and the light sources and a light-passing board for carrying original copy disposed on the upper part of the frame. The invention is characterized in that: a truncated pyramid is disposed on the inner surface of the light-passing board; the truncated pyramid is arranged on the location of the light-passing board inner surface relative to the lens; the height of the truncated pyramid is less than the height from the truncated pyramid to the upper surface of the lens in order to allow the truncated pyramid not to get to the upper surface of the lens; the lateral surface close to the light source of the truncated pyramid is light incidence surface, while the lateral surface far from the light source of the truncated pyramid is light reflection surface; the truncated pyramid is positioned relative to the lenses ensuring the light incidence surface of the truncated pyramid is perpendicular to the emitting direction of the light from the light source; a light-reflectance apparatus is disposed on the light reflection surface of the truncated pyramid. The invention increases the intensity of the light shot onto the original copy, reduces the influence of the scattered lights, and improves the image reading quality.

Description

Technical field: [0001] The invention relates to an image reading device, in particular to a high-illuminance contact image sensor. Background technique: [0002] Figure 4 It is a cross-sectional view of an existing contact image sensor. In the figure, 1 is a light-emitting light source, 2 is a lens, 3 is a photosensitive part (photosensitive integrated circuit) that receives light collected by the lens 2, and 4 is a photosensitive integrated circuit 3 arranged in a straight line. 6 is a frame for accommodating a light source 1, a lens 2, and a sensor substrate 4; 5 is a light-transmitting plate arranged on the frame 6 to carry an original; 10 is an original. [0003] In the above-mentioned contact image sensor, the light emitted by the light source 1 passes through the light-transmitting plate 5 and is irradiated on the original document 10 outside. Almost 100% of the light is reflected, and the reflected light passes through the glass plate 5 , is collected by the lens 2...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the problem of high light loss of the existing contact image sensor, and to propose a high-illuminance high-illuminance contact image sensor

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