CN1325083A - Scanning device for light-emitting diode array light source - Google Patents

Abstract

A scanning device of a light emitting diode array light source comprises a machine shell and an optical machine. The optical machine comprises a light emitting diode array for providing a light source required by the scanning device to scan to obtain an optical image, a red-green-blue filter element for filtering the optical image into a red image, a green image and a blue image respectively, a lens module for focusing the red image, the green image and the blue image, and a black-and-white charge coupling element for receiving the red image, the green image and the blue image, converting the red image, the green image and the blue image into red image signals, green image signals and blue image signals respectively and outputting the red image signals, the green image signals and the blue image signals.

Description

Light-emitting diode array light source scanning device

The invention relates to a scanning device, in particular to a charge-coupled device (CCD) type scanning device using a light emitting diode (LED) array as a light source.

The invention of ancient printing and the emergence of modern photocopiers have greatly helped the dissemination of information and the popularization of knowledge, and because of the use of a large amount of paper, it has caused a crisis of destruction of green resources on the earth; plus How to save important documents, pictures or photos, etc., and facilitate search management or portability, transmission and communication, etc., are also problems that must be faced. Later, due to the advent of the personal computer (PC), the third wave of revolution was promoted, and the above-mentioned predicament was also improved. Today, it is common to use a personal computer with a scanning device to store important documents on the personal computer after scanning, which is also easy to manage, and the Internet can also be used to transmit data, moving towards the goal of saving paper and energy.

Please refer to FIG. 1 , which is a structural cross-sectional view of a conventional planar scanning device. The scanning device includes a casing 101 and an optical engine 105 , a scanning platform 103 is located above the casing 101 , and a document to be scanned (not shown in the figure) is placed on the scanning platform 103 . The optical machine 105 is located inside the casing 101 and below the scanning platform 103 . During scanning operations, the optical machine 105 moves to scan the document to be scanned. Please refer to FIG. 2 , which is a perspective view of the optical machine 105 of the scanning device in FIG. 1 . The optical machine 105 includes a light source 201 for generating light when scanning documents.

Please refer to FIG. 3 , which is an optical path diagram of the scanning device of FIG. 1 ; the optical machine 105 also includes a charge coupled device (Charge Coupled Device, CCD) 301 and a lens module assembly 303, and the charge coupled device 301 is used to convert optical signals The lens module 303 is used to focus the light by generating an electrical signal. In a general scanning device, the charge-coupled device 301 is a color charge-coupled device for photoelectric signal conversion, so as to sense a color document to be scanned. In the process of scanning the document to be scanned, the light source 201 generates light, which is reflected by the scanning platform 103, focused by the lens module 303, and finally converted into an electrical signal by the charge-coupled device 301 and transmitted to the personal computer. In general scanning devices, the light source 201 mostly uses fluorescent tubes or cold or hot cathode fluorescent tubes, but these are light sources that consume more power. required current, resulting in increased cost, excessive power consumption, and more complex packaging. Please also refer to FIG. 4 , which is a perspective view of an existing flat-bed scanning device. The casing 101 is externally connected to a power supply 403 to provide the power required by the scanning device; the signal line 405 is used to connect to a personal computer.

The object of the present invention is to provide a scanning device that consumes less current as a light source, so as to save energy and reduce costs.

The purpose of the present invention is achieved by providing a scanning device for a light emitting diode array light source, including: a casing with a scanning platform for placing documents to be scanned; and an optical machine that is movably arranged on The inside of the casing is used to scan the document to be scanned on the scanning platform, and the optical machine includes: a light emitting diode (LED) array, which is used to provide the scanning device with the required light source for scanning to obtain an optical image; A red, green and blue filter element is used to filter the optical image into a red image, a green image and a blue image respectively; a lens module is used to focus the red image, green image and blue image ; and a black-and-white charge-coupled device for receiving the red image, green image and blue image, and converting them into a red image signal, a green image signal and a blue image signal for output respectively.

The present invention also provides a scanning device for a light-emitting diode array light source, including: a casing with a scanning platform for placing documents to be scanned; and an optical machine movably arranged inside the casing for To scan the document to be scanned on the scanning platform, the optical machine includes: a light emitting diode (LED) array, used to provide the scanning device with the light source required for scanning to obtain an optical image; a lens module assembly, used to focus the optical image to obtain a focused image; a cylinder of green and blue filter elements is used to filter the focused image into a red image, a green image and a blue image respectively; and a black and white charge-coupled element is used for The red image, the green image and the blue image are received and converted into a red image signal, a green image signal and a blue image signal respectively for output.

The present invention also provides a charge-coupled image scanning device, including: a casing with a scanning platform for placing documents to be scanned; The document to be scanned on the scanning platform is scanned, and the optical machine includes a light emitting diode (LED) array, which is used to provide the light source required by the image scanning device for scanning to obtain an optical image.

The present invention also provides a charge-coupled color scanning device, which includes: a casing with a scanning platform for placing documents to be scanned; The document to be scanned on the scanning platform is scanned, and the optical machine includes: a light source, which is used to provide the scanning device for scanning to obtain an optical image; a red, green and blue filter element, which is used to filter the optical image into a A red image, a green image, and a blue image; and a black-and-white charge-coupled device for receiving the red image, green image, and blue image and converting them into a red image signal, a green image signal, and a blue image signal respectively output.

The present invention also provides a charge-coupled color scanning device, which includes: a casing with a scanning platform for placing documents to be scanned; The document to be scanned on the scanning platform is scanned, and the optical machine includes: a light source, which is used to provide the scanning device for scanning to obtain an optical image; a red, green and blue filter element, which is used to filter the optical image into a A red image, a green image, and a blue image; and a black-and-white charge-coupled device for receiving the red image, green image, and blue image and converting them into a red image signal, a green image signal, and a blue image signal respectively output.

The present invention also provides a charge-coupled color scanning device, which includes: a casing with a scanning platform for placing documents to be scanned; The document to be scanned on the scanning platform is scanned, and the optical machine includes: a red, green and blue filter diode array, which is used to provide the light source required by the scanning device for scanning to obtain a red image, a green image and a blue image ; A black-and-white charge-coupled device, used to receive the red image, green image and blue image, respectively convert a red image signal, a green image signal and a blue image signal for output.

According to the above features, the present invention proposes a scanning device for a light-emitting diode (LED) array light source, which uses a light-emitting diode array light source. Since the current consumed by the light-emitting diode array is small, the current demand of the scanning device can be reduced and save energy. Therefore, the scanning device does not need to use an additional power supply, and the direct use of the bus power on the personal computer can sufficiently supply the current demand of the scanning device. In addition, the scanning device also includes red, green and blue filter elements, so that black and white charge-coupled elements can also be used to scan color documents or pictures, which can replace the color charge-coupled elements used in general scanning devices. Because the cost of black-and-white CCDs is lower than that of color CCDs in mass production, the scanning device of the LED array light source can simultaneously achieve the goals of energy saving and cost saving.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a sectional view of an existing platform scanning device;

FIG. 2 is an optical-mechanical perspective view of the scanning device of FIG. 1;

3 is an optical path diagram of the scanning device of FIG. 1;

FIG. 4 is a perspective view of a conventional flatbed scanning device.

Fig. 5 is an optical-mechanical perspective view of a scanning device of a light-emitting diode array light source according to a preferred embodiment of the present invention;

6 is a perspective view of a scanning device of a light emitting diode array light source in a preferred embodiment of the present invention;

FIG. 7 is an optical path diagram of a scanning device of a light emitting diode array light source according to a preferred embodiment of the present invention.

Please refer to FIG. 5 , which is an optical-mechanical perspective view of a scanning device for an LED array light source according to a preferred embodiment of the present invention. The light emitting diode array 503 is located in the optical machine 501, and when scanning the document to be scanned, the light emitting diode array 503 will generate light. The light emitting diode array 503 especially uses a light emitting diode (LED) array, because the power consumption of the light emitting diode array is relatively small, which can reduce the power requirement of the scanning device without using an additional power supply. Please refer to FIG. 6 , which is a perspective view of a scanning device of a light-emitting diode array light source in a preferred embodiment of the present invention. The casing 601 is connected with a signal line 603 to connect to a personal computer (not shown in the figure). Signal line 603 provides bus power to the scanning device. In this way, in addition to saving energy, the cost of the power supply can also be saved, thereby reducing the difficulty of packaging the scanning device.

Please refer to FIG. 7 , which is an optical path diagram of a scanning device for an LED array light source according to a preferred embodiment of the present invention. The scanning platform 703 is located above the casing 601 , and the documents to be scanned (not shown in the figure) are placed on the scanning platform 703 . The optical machine 501 is located inside the casing 601 and below the scanning platform 703 . In addition, the optical machine 501 also includes a black-and-white charge-coupled element 707 , a lens module assembly 709 and a red-green-blue filter element 705 . When scanning the document to be scanned, the light emitting diode array 503 is used as a light source to generate light, which is reflected by the scanning platform 703 to obtain an optical image. Then the optical image is filtered by the red, green and blue filter element 505 to obtain a red image, a green image and a blue image respectively. Then through the lens module 709, the red image, the green image, and the blue image are focused. Finally, the red image, green image, and blue image are received by the black-and-white charge-coupled device 707, and converted into red image signals, green image signals, and blue image signals for output. Therefore, although the scanning device uses black and white charge-coupled devices 507, it can still scan color documents or pictures, so it can replace the color charge-coupled devices of existing scanning devices. Moreover, also in the case of mass production, the cost of the black and white CCDs 507 is lower than that of the color CCDs, which can save costs.

In the above-mentioned embodiments of the present invention, although the optical image is firstly filtered by the red, green and blue filter elements, and then focused by the lens module assembly as an example for illustration. However, those who are familiar with this technology can use the technology of the present invention to design the optical image to be focused by the lens module assembly to obtain a focused image, then the red, green and blue filter elements filter the focused image, and finally the charge-coupled element Converted to image signal output.

In addition, in the above-mentioned embodiment, the white light-emitting diode array is used as the light source, and after being filtered by the red, green and blue filter elements, a red image, a green image, and a blue image are generated, and then focused by the lens module assembly, and finally the black and white The charge coupled device receives. Then those who are familiar with this technology can use the technology of the present invention to use the red, green and blue light-emitting diode array as the light source to generate red images, green images and blue images through the reflection of the scanning platform, and then focus through the lens module assembly , and finally received by a black and white charge-coupled device. In this way, red, green and blue filter elements are not required, and it can also be implemented.

The scanning device of the LED array light source disclosed in the above-mentioned embodiments of the present invention has the following advantages:

1. The scanning device of the light-emitting diode array light source uses the light-emitting diode array as a light source, which reduces power consumption much compared with the general use of fluorescent light sources or cold or hot cathode fluorescent tubes, and can save energy.

2. Because the scanning device of the light-emitting diode array type light source uses the light-emitting diode array as the light source, the demand for power supply is small, so no additional power supply is needed, and the power supply directly using the bus is sufficient, which can save costs and reduce Packaging difficulties.

3. This scanning device uses black-and-white charge-coupled devices, and can also scan color documents or pictures. In the case of the same mass production, the price of black-and-white charge-coupled devices is lower than that of color charge-coupled devices, which can save costs.

Although the present invention has been disclosed in conjunction with the above preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (14)

1. the scanister of a LED array light source comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine is arranged at this casing inside movably, and in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises:

One light emitting diode (LED) array obtains an optical imagery in order to provide this scanister to scan required light source;

One RGB filter element is in order to filter out this optical imagery respectively one red image, a green image and a blue image;

One lens membrane module is in order to focus on this red image, green image and blue image; And

One black and white charge coupled cell in order to receive this red image, green image and blue image, converts a red image signal, a green video signal and blue image signal output respectively to.

2. scanister as claimed in claim 1, wherein this scanister is for using the bus power source of PC.

3. the scanister of a LED array light source comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine is arranged at this casing inside movably, and in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises:

One light emitting diode (LED) array obtains an optical imagery in order to provide this scanister to scan required light source;

One lens membrane module in order to this optical imagery is focused on, obtains a focusedimage;

One RGB filter element is in order to filter out this focusedimage respectively one red image, a green image and a blue image; And

One black and white charge coupled cell in order to receive this red image, green image and blue image, converts a red image signal, a green video signal and blue image signal output respectively to.

4. scanister as claimed in claim 3, wherein this scanister is to use the bus power source of PC.

5. electric charge manifold type image-scanning device comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine, be arranged at this casing inside movably, in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises a light emitting diode (LED) array, obtains an optical imagery in order to provide this image-scanning device to scan required light source.

6. scanister as claimed in claim 5, wherein this scanister is for using the bus power source of PC.

7. electric charge manifold type chromoscan device comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine is arranged at this casing inside movably, and in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises:

One optical imagery is provided in order to provide this scanister to scan one light source;

One RGB filter element is in order to filter out this optical imagery respectively one red image, a green image and a blue image; And

One black and white charge coupled cell in order to receive this red image, green image and blue image, converts a red image signal, a green video signal and blue image signal output respectively to.

8. scanister as claimed in claim 7, wherein this ray machine also comprises:

One lens membrane module in order to receiving this optical imagery, and focuses on this optical imagery, exports this RGB filter element again to.

9. scanister as claimed in claim 7, wherein this ray machine also comprises:

One lens membrane module in order to respectively this red image, green image and blue image are focused on, exports the black and white charge coupled cell to again.

10. the scanister of a rgb led array light source comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine is arranged at this casing inside movably, and in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises:

One rgb led (LED) array obtains a red image, a green image and a blue image in order to provide this scanister to scan required light source;

One lens membrane module, in order to this red image, green image and blue image are focused on, and

One black and white charge coupled cell in order to receive this red image, green image and blue image, converts a red image signal, a green video signal and blue image signal output respectively to.

11. scanister as claimed in claim 10, wherein this scanister is for using the bus power source of PC.

12. an electric charge manifold type chromoscan device comprises:

One casing has the one scan platform, in order to place file to be scanned; And

One ray machine is arranged at this casing inside movably, and in order to the file to be scanned on this scanning platform is scanned, this ray machine comprises:

One RGB optical filtering diode array obtains a red image, a green image and a blue image in order to provide this scanister to scan required light source;

One black and white charge coupled cell in order to receive this red image, green image and blue image, converts a red image signal, a green video signal and blue image signal output respectively to.

13. scanister as claimed in claim 12, wherein this ray machine also comprises:

One lens membrane module in order to respectively this red image, green image and blue image are focused on, exports this black and white charge coupled cell to again.

14. scanister as claimed in claim 12, wherein this scanister is for using the bus power source of PC.

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