CN1178089C - Light source for penetrating manuscripts on image scanners - Google Patents

Abstract

The invention discloses a light source for penetrating manuscript used in image scanner, which is used in an image scanner, the image scanner comprises a scanning platform and an image picking module, the light source for penetrating manuscript used in image scanner comprises: a shell, a three-color light source, a switching mechanism and a transmission mechanism; the shell can be placed on the scanning platform; the three-color light source is arranged in the shell and sends three-color light rays for scanning to the scanning platform; the switching mechanism is connected with the three-color light source and is controlled to switch the three-color light source, so that the light transmitted to the scanning platform is monochromatic light of three chromatic lights; the transmission mechanism is used for driving the three-color light source and the switching mechanism to move along with the image acquisition module so as to complete the scanning action of the color penetration manuscript.

Description

Light source for penetrating manuscripts on image scanners

technical field

The invention relates to a light source for penetrating manuscripts, in particular to a light source for penetrating manuscripts used in image scanners.

Background technique

With the continuous improvement of manufacturing technology and the gradual popularization of prices, image scanners have become an indispensable peripheral device for personal computers. With the increase in the processing speed of personal computers and the improvement of users' requirements for scanned image quality, The types of scanned objects that image scanners can provide in the market are also increasing, for example, reflective manuscripts (such as books) and transparent manuscripts (such as negatives) can be scanned respectively.

As shown in FIG. 1 , it is a schematic diagram of the structure of a flatbed image scanner completed by a conventional contact image sensor (contact image sensor, CIS) module, wherein the contact image sensor module under the scanning platform 10 The group 11 is mainly composed of three primary color light sources (RGB light source) 111, a lenticular lens (Rod Lens) 112 and a sensor chip (sensor Chip) 113, so that the color reflection manuscript on the scanning platform 10 can be scanned, and when using When the reader is going to scan the transparencies on the scanning platform 10, he must install a transparency adapter 12 (Transparency Adapter, TA) to provide the translucent light, but most of the transparency adapters can only provide monochrome Therefore, it is impossible to perform color scanning on the color transparent manuscript, and how to improve the disadvantages of the above-mentioned conventional technologies is an urgent problem to be solved by those skilled in the art.

Contents of the invention

The object of the present invention is to provide a light source for transparent manuscripts used in image scanners, which has the function of color scanning for color transparent manuscripts.

To achieve the stated purpose, the technical solution provided by the present invention is: a light source for penetrating manuscripts used on an image scanner, applied to an image scanner, the image scanner includes a scanning platform and an image capture Take the module, and the light source for penetrating manuscripts used on the image scanner includes: a housing, a three-color light source, a switching mechanism and a transmission mechanism; the housing can be placed on the scanning platform The three-color light source is arranged in the casing, and emits the three-color light for scanning to the scanning platform; the switching mechanism is connected to the three-color light source, and is controlled to switch the three-color light source, so that the The light of the scanning platform is a monochromatic light among the three colored lights; the transmission mechanism is used to drive the three-color light source and the switching mechanism to move with the image capture module to complete a color penetration document scanning.

In the light source for penetrating manuscripts used in the image scanner, the three-color light source includes the following components: three monochromatic lamp tubes; and RGB three primary color filters, which are set corresponding to each monochromatic lamp tube.

In the light source for penetrating manuscripts used in the image scanner, the three-color light source can be RGB three-primary-color cold-cathode lamps.

In the light source for penetrating manuscripts used in the image scanner, the three-color light source can be an array of RGB three-primary-color light-emitting diodes.

In the light source for penetrating manuscripts used on the image scanner, the three-color light source includes the following components: three light guide strips; and three light-emitting diodes, which respectively emit RGB three primary colors, which are respectively arranged on the corresponding light guide strips side.

In the light source for penetrating manuscripts used in the image scanner, the switching mechanism may be a controlled single-pole multi-throw switch, which is used to controlly turn on one of the three-color light sources.

In the light source for penetrating manuscripts used on image scanners, the transmission mechanism is composed of a stepping motor and a guide rod.

In the image scanner on which the light source for penetrating manuscripts used on the image scanner is applied, the image capture module may be a contact image sensor (Conact Image Sensor, CIS) module.

The light source for penetrating manuscripts used on image scanners provided by the present invention adopts the technical scheme of the present invention. After the light sources for penetrating manuscripts used on image scanners emit light through three-color light sources, the electric motor ( motor) drives the switching mechanism and the transmission mechanism, and the transmission mechanism is connected to the three-color light source, so that the three-color light source and the switching mechanism move together with the image capture module, and the switching mechanism controls the three-color light source to switch, so that The light transmitted to the scanning platform can be divided into one monochromatic light of one of the three primary colors in turn, and then complete the scanning action of a color penetrating manuscript, which effectively improves the defect that monochromatic light cannot complete color scanning.

Description of drawings

FIG. 1 is a schematic diagram of the structure of a conventional flatbed image scanner completed by using a contact image sensor (Contact Image Sensor, CIS) module.

FIG. 2 is a schematic structural view of a preferred embodiment of a light source for penetrating manuscripts used in an image scanner provided by the present invention.

Fig. 3 is another preferred light source for penetrating manuscripts used on image scanners provided by the present invention.

Schematic diagram of the embodiment.

Fig. 4 is yet another preferred light source for penetrating manuscripts used on image scanners provided by the present invention.

Schematic diagram of the embodiment.

FIG. 5 is a structural schematic diagram of another preferred embodiment of the light source for penetrating manuscripts used in image scanners provided by the present invention.

Description of figure number

10...Scanning platform 11...Contact image sensor module

111...Three primary color light sources 112...Lenticular lens

113......Sensor Chip        12        

2...image scanner 20...scanning platform

21...Image capture module 22...Light source for penetrating manuscripts

221...Shell 222...Light source

223...RGB three-primary color filter device 224...Switching mechanism

2251...Stepping motor 2252...Guide rod

225......Transmission mechanism 51, 52, 53...Light guide strip

41, 42, 43...White cold cathode lamp 44, 45, 46...RGB three primary color filters

31, 32, 33...RGB three primary colors cold cathode lamp (or light emitting diode array)

54, 55, 56...RGB three primary color light-emitting diodes

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be described in further detail:

Example 1

As shown in FIG. 2 , it is a schematic structural diagram of a preferred embodiment of a light source for penetrating manuscripts used on an image scanner provided by the present invention, wherein the image scanner 2 includes a scanning platform 20 and an image capture module. Group 21, the penetrating light source 22 used on the image scanner includes a housing 221, a light source 222 composed of a cold cathode lamp tube, an RGB three-primary color filter device 223, and a switch driven by an electric motor (motor). The mechanism 224 and the transmission mechanism 225 formed by the stepping motor 2251 and the guide rod 2252, as shown in FIG. The image capture module 21 moves, and the switching mechanism 224 is controlled to drive the three-color filter device to switch, so that the light transmitted to the scanning platform can be divided into a monochromatic light in the three primary color light in turn, Then, the scanning action of a color transparent manuscript is completed.

Example 2

As shown in FIG. 3 , it is a structural schematic diagram of another preferred embodiment of the light source for penetrating manuscripts provided on the image scanner provided by the present invention. The image scanner 2 includes a scanning platform 20 and an image capture module. Group 21, the light source 22 for penetrating manuscripts used on image scanners includes a housing 221 and a transmission mechanism 225 composed of a stepping motor 2251 and a guide rod 2252. Cold-cathode fluorescent tubes or LED Arrays (LED Array) 31, 32, and 33 of RGB three primary colors, and the switching mechanism 224 is a single-pole multi-throw switch. When the transmission mechanism 225 drives the light source 222 and the switching mechanism 224, the image When the capture module 21 is moving, the switching mechanism 224 is controlled to switch the cold cathode lamps of RGB three primary colors or the light-emitting diode arrays (LEDArray) 31, 32, 33 of RGB three primary colors on and off, so that the The light on the scanning platform can turn into one of the three primary colors of light in turn, and then complete the scanning action of a color penetrating manuscript.

Example 3

As shown in FIG. 4 , it is a structural schematic diagram of another preferred embodiment of the light source for penetrating manuscripts used on image scanners provided by the present invention. The difference from Embodiment 2 is that the light source 222 is based on three White cold cathode lamps 41, 42, 43 and RGB three primary color filters 44, 45, 46 are jointly formed, and the switching mechanism 224 is also completed by a controlled single-pole multi-throw switch. As for other components, there is no difference from Embodiment 2 , so no more details.

Example 4

As shown in FIG. 5 , it is a schematic structural view of another preferred embodiment of the light source for penetrating manuscripts used on image scanners provided by the present invention, wherein the light source 222 is represented by three light guide strips (light guide) 51, 52 , 53 and RGB three-primary-color light-emitting diodes 54, 55, 56. The switching mechanism 224 is also implemented by a controlled single-pole multi-throw switch, and other components are the same as those in Embodiment 2, and will not be repeated here.

The light sources for penetrating manuscripts used in image scanners provided in the above embodiments of the present invention can respectively emit the three primary colors of light required for color scanning, effectively improving the current penetrating manuscripts that can only provide monochromatic light sources. defects, complete the color scanning for the color penetrating manuscript, and achieve the main purpose of the present invention. But for those skilled in the art who are familiar with this technology, if they only make detailed modifications to this technology, it still belongs to the protection scope of this patent.

Claims (8)

1. A light source for penetrating manuscripts used on image scanners, applied to an image scanner, the image scanner includes a scanning platform and an image capture module; it is characterized in that: the image scanner The light source for penetrating manuscripts on the scanner includes: a casing, which can be placed on the scanning platform; a three-color light source, which is installed in the casing, and emits three-color light for scanning to the scanning platform; a switching mechanism , connected to the three-color light source, controlling the three-color light source to switch, so that the light transmitted to the scanning platform is a monochromatic light among the three color lights; and a transmission mechanism, used to drive the three-color light source and the three-color light source The switching mechanism moves together with the image capture module to complete the scanning action of a color transparent manuscript. 2. The light source for penetrating manuscripts used on image scanners as claimed in claim 1, wherein the three-color light source comprises the following components: three monochromatic lamp tubes; and RGB three primary color filters, corresponding to each Set for monochrome lamps. 3 . The light source for penetrating manuscripts used in image scanners according to claim 1 , wherein the three-color light sources are cold-cathode lamps with RGB three primary colors. 4 . 4 . The light source for penetrating manuscripts used in image scanners according to claim 1 , wherein the three-color light source is an array of RGB three-primary-color light-emitting diodes. 5. The light source for penetrating manuscripts used in image scanners as claimed in claim 1, wherein the three-color light source comprises the following components: three light guide strips; and three light-emitting diodes, which respectively emit RGB three primary colors, They are respectively arranged on one side of the corresponding light guide strip. 6. The light source for penetrating manuscripts used in image scanners as claimed in claim 1, characterized in that: the switching mechanism is a controlled single-pole multi-throw switch for controlled lighting of the three-color light sources one. 7. The light source for penetrating manuscripts used in image scanners as claimed in claim 1, wherein the transmission mechanism is composed of a stepping motor and a guide rod. 8 . The light source for penetrating manuscripts used in image scanners as claimed in claim 1 , wherein the image capture module is a contact image sensor module.

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