CN1270511C - Light source apparatus with surging wave suppression - Google Patents
Light source apparatus with surging wave suppression Download PDFInfo
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- CN1270511C CN1270511C CN 03150294 CN03150294A CN1270511C CN 1270511 C CN1270511 C CN 1270511C CN 03150294 CN03150294 CN 03150294 CN 03150294 A CN03150294 A CN 03150294A CN 1270511 C CN1270511 C CN 1270511C
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Abstract
The present invention relates to a light source device with the function of surging wave suppression, which is installed on an image uptake device for providing a light source for the image uptake device during the scanning of files. The light source device comprises a bending lamp for generating a light source and compensating the brightness on both ends by bending structures on both of the two ends, a group of shading components installed at the bending part on both ends of the lamp to shade a part of light rays of the lamp. Therefore, even if the bending parts on both of the two ends of the lamp considerably approach to an image input port, the light source can also eliminate surging waves generated on both ends of an image sensor of the image uptake device. Therefore, the length of the light source device can be shortened, and the width of the image uptake device using the light source device can be narrowed.
Description
Technical field
The present invention relates to a kind of light supply apparatus, particularly a kind of tool that utilizes the part light source that light shield device covers crooked fluorescent tube suppresses the light supply apparatus of surging wave.
Background technology
Figure 1 shows that the part Organization Chart of known falt bed scanner.As this figure institute, this falt bed scanner comprises a moving frame 14 and one scan platform 12.File 11 to be scanned is to be positioned on the scanning platform 12.Moving frame 14 includes light supply apparatus 13 (fluorescent tube), speculum (mirror) 15, lens (lens) 16 and image-pickup assembly 17.Image-pickup assembly 17 can be Charged Coupled Device (charge coupleddevice, CCD).And light supply apparatus 13 comprises a fluorescent tube 131 and a lamp tube securing holder 132.This moving frame 14 is near the Position Design one image signal input port 18 of light supply apparatus 13, use allowing the irradiate light of fluorescent tube 131 behind the file 11 to be scanned, can enter in the moving frame 14 from image signal input port 18 from the scattered beam of file 11 reflections to be scanned.Enter the reflection of the light process speculum 15 in the moving frame 14, and be projeced into image-pickup assembly 17 via lens 16.
Figure 2 shows that known line style fluorescent tube is applied to the schematic diagram of falt bed scanner.As shown in the drawing, the two ends length of fluorescent tube 21 is L0, and the effective sweep width that can provide is X, and wherein L0 is greater than X.Numbering 18 is the image signal input port of falt bed scanner.Because a little less than the two ends brightness of general fluorescent tube (for example cold-cathode tube), therefore the effective sweep width X that can provide can be less than length L 0, and the two ends of fluorescent tube 21 have the part position that enough brightness can't be provided, for example a and b position.
For the more weak brightness in general line style fluorescent tube 21 two ends of compensation image 2, Fig. 3 shows a kind of crooked fluorescent tube.As shown in Figure 3, the two ends of this fluorescent tube 31 are into the U font, use and utilize the first compensator section C1 and the second compensator section C2 to compensate the more weak shortcoming of general fluorescent tube 21 two ends brightness.Therefore, comparison diagram 2 and Fig. 3, the two ends length of the fluorescent tube 20 of Fig. 3 is L1, can be less than the two ends length L 0 of the fluorescent tube 21 of Fig. 1.Fig. 4 changes for the brightness that fluorescent tube detected of image capture unit from Fig. 2 and Fig. 3, and wherein curve 41 is the brightness variation of the fluorescent tube 21 of Fig. 2, and curve 42 is the brightness variation of the fluorescent tube 31 of Fig. 3.Can recognize that from Fig. 4 Fig. 3 uses crooked fluorescent tube can provide preferable brightness at the two ends of image signal input port 18.
But,, it should be noted that then the A point at fluorescent tube 31 two ends among Fig. 3 and the distance between the C point must be greater than effective sweep width X if fluorescent tube 31 will have the brightness performance of the curve 42 of Fig. 4.That is the A point at fluorescent tube 31 two ends and C point must be positioned at the B point of effective sweep width and the outside that D is ordered.
Fig. 5 shows the example of another crooked fluorescent tube.The fluorescent tube of Fig. 5 and Fig. 3 is the fluorescent tube of two ends U type, and its difference is that the A point at fluorescent tube 51 two ends of Fig. 5 and the distance between the C point are less than effective sweep width X.In the fluorescent tube 51 of Fig. 5, the A point at fluorescent tube 51 two ends and the distance between the C point are less than effective sweep width X, so the B of effective sweep width X point and D point extend to the fluorescent tube top position.Because the A point at fluorescent tube 51 two ends and the inboard that the C point is positioned at effective sweep width X cause the two ends of the received light-source brightness of image capture unit to produce surging wave.
Fig. 6 show image capture device changes from the brightness that fluorescent tube detected of Fig. 2 and Fig. 5, and wherein curve 41 is the brightness variation of the fluorescent tube 31 of Fig. 2, and curve 43 is the brightness variation of the fluorescent tube 51 of Fig. 5.This kind surging wave not only causes two ends light signal supersaturation easily, also makes the colour correction calculating of software or firmware can't stablize correctly, causes scan-image undesired.
What surging wave produced is former because image capture unit is to be used for the scanning reflection original text, and light supply apparatus is to be used to provide light source.The received light of image capture unit is scattered light but not reverberation, so the utilization ratio of whole light source was exactly lower originally, and light source is just being penetrated and the efficient difference of oblique fire is bigger, and this is normal physical phenomenon.Because the B point and the D point of Fig. 5 fluorescent tube 51 extend to the fluorescent tube top position, make the reverberation of part light of the second compensator section C2 inject image capture unit, and cause surging wave.Therefore, AB distance and CD distance must surpass certain value (optometry system and decide), just can avoid producing surging wave, and still possess compensation effect.
Because AB distance and CD distance must surpass certain value, therefore under the condition of fixing effective sweep width X, the fluorescent tube length L 1 of Fig. 3 can't effectively shorten, and makes the width of image capture unit also can't dwindle.If use the fluorescent tube 51 of Fig. 5 that light source is provided, be L2 though can shorten fluorescent tube length, can produce surging wave again, cause image quality not good.
Summary of the invention
Because the problems referred to above, the objective of the invention is to propose a kind ofly under the situation that shortens fluorescent tube length, can effectively suppress the generation of surging wave, and the tool that can reach the effect of light source compensation suppresses the light supply apparatus of surging wave.
Tool of the present invention suppresses the light supply apparatus of surging wave to be realized by following technical scheme.
A kind of tool suppresses the light supply apparatus of surging wave, be to be installed on an image capture unit to use light source when this image capture unit scanning document is provided, this image capture unit has an image signal input port allows light enter, this light supply apparatus comprises: a crooked fluorescent tube, be to be used for producing light source, and compensate the brightness at two ends by the warp architecture at two ends; It is characterized in that: be provided with
One group of shield assemblies, the part light of this fluorescent tube is covered in the part position that is installed on aforementioned fluorescent tube bending two ends, uses the two ends that suppress this light supply apparatus to surging wave that aforementioned image capture unit caused;
Wherein, aforementioned crooked fluorescent tube is towards the bending of image signal input port.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: the two ends of aforementioned crooked fluorescent tube are vertical curve.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: the inner distance at the two ends of aforementioned crooked fluorescent tube is less than the effective scanning distance of aforementioned image capture unit.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is light tight assembly.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is a metal.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is semi-transparent assembly.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is to coat on the aforementioned fluorescent tube.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned image capture unit is a falt bed scanner.
Described tool suppresses the light supply apparatus of surging wave, and it is characterized in that: the aforementioned lights source apparatus is to be fixed on the moving frame of aforementioned falt bed scanner.
Described tool suppresses the light supply apparatus of surging wave, it is characterized in that: aforementioned shield assemblies and aforementioned moving frame form one.
Tool of the present invention suppresses the light supply apparatus of surging wave, and comprise: a crooked fluorescent tube is to be used for producing light source, and compensates the brightness at two ends by the warp architecture at two ends; And one group of shield assemblies, be the part light that this fluorescent tube is covered in the part position that is installed on the lamp tube ends bending, use the two ends that suppress this light supply apparatus to surging wave that image capture unit caused.
The invention has the advantages that:
Under the situation that shortens fluorescent tube length, can effectively suppress the generation of surging wave, and can reach the effect of light source compensation.
Below enumerate specific embodiment and describe the light supply apparatus that tool of the present invention suppresses surging wave with reference to the accompanying drawings in detail.
Description of drawings
Figure 1 shows that the part Organization Chart of known falt bed scanner.
Figure 2 shows that known line style fluorescent tube is applied to the schematic diagram of falt bed scanner.
Figure 3 shows that known crooked fluorescent tube is applied to the schematic diagram of falt bed scanner.
Fig. 4 changes for the brightness that fluorescent tube detected of image capture unit from Fig. 2 and Fig. 3.
Figure 5 shows that another kind of known crooked fluorescent tube is applied to the schematic diagram of falt bed scanner.
Fig. 6 show image capture device changes from the brightness that fluorescent tube detected of Fig. 2 and Fig. 5.
Fig. 7 shows that tool of the present invention suppresses first embodiment of the light supply apparatus of surging wave.
Fig. 8 show image capture device changes from the brightness that fluorescent tube detected of Fig. 2 and Fig. 7.
Fig. 9 shows that tool of the present invention suppresses second embodiment of the light supply apparatus of surging wave.
Figure 10 A shows an example of shield assemblies of the present invention.
Figure 10 B is the schematic diagram that shield assemblies is incorporated into lamp tube securing holder 132.
Figure 11 shows the falt bed scanner that uses tool of the present invention to suppress the light supply apparatus of surging wave.
Figure 12 shows the schematic diagram of usage platform formula scanner scanning books.
Embodiment
Because the purpose of the crooked fluorescent tube of use is the shortcoming for the two ends luminance shortage that compensates general line style fluorescent tube, but the distance at the two ends of crooked fluorescent tube must be greater than effective sweep width, just can not cause surging wave, the length that also therefore limits this fluorescent tube can't further shorten.The distance that the present invention then breaks through the two ends of crooked fluorescent tube must further shorten the length of crooked fluorescent tube greater than the restriction of effective sweep width.And in order to suppress the generation of surging wave, utilize two shield assemblies to cover two side positions of lamp tube ends, make the light at fluorescent tube 71 two ends can directly not reflex to image capture unit near image signal input port 18.So, use the width of falt bed scanner of the present invention can be more exquisite.
Fig. 7 shows that tool of the present invention suppresses first embodiment of the light supply apparatus of surging wave.As shown in the drawing, the light supply apparatus 70 that tool of the present invention suppresses surging wave comprises a crooked fluorescent tube 71 and two shield assemblies 72,73.The framework of crooked fluorescent tube 71 can be identical with the fluorescent tube 51 of Fig. 5 with size, and B point and D point extend to fluorescent tube 71 top positions, thus the length L 3 of fluorescent tube 71 can equate with the length L 2 of the fluorescent tube 51 of Fig. 5, but less than the fluorescent tube length of Fig. 2 and Fig. 3.The two ends of crooked fluorescent tube 71 are the U font, and two shield assemblies 72,73 promptly are fixed in two side positions of lamp tube ends corresponding to image signal input port 18.This light supply apparatus 70 can be installed on the moving frame of falt bed scanner, uses the light source when this scanner scanning reflection original text is provided, and is for example shown in Figure 1.
As shown in Figure 7, this fluorescent tube 71 can provide three luminance compensation sections, be respectively C1, C2 and C3, wherein 72,73 of the light crested assemblies between compensator section C2 and the C3 cover, therefore the reverberation of the light between compensator section C2 and the C3 can not injected image capture unit, so can not cause surging wave.Because using the purpose of shield assemblies 72,73 is to cover or the light of weakened part compensator section, thus shield assemblies 72,73 so long as opaque or translucent material all can, for example metal or diffuser (Diffuser) etc.
Fig. 8 show image capture device changes from the brightness that fluorescent tube detected of Fig. 2 and Fig. 7, and wherein curve 41 is the brightness variation of the fluorescent tube 31 of Fig. 2, and curve 81 is the brightness variation of the fluorescent tube 71 of Fig. 7.As shown in Figure 8, the light supply apparatus that tool of the present invention suppresses surging wave can not produce surging wave at two ends, can reach the effect of luminance compensation simultaneously.And because light supply apparatus of the present invention is less in the light source incidence angle of compensator section, the utilization ratio of scattered light is higher, and its compensation effect will be better than the compensation effect of Fig. 3.
Fig. 9 shows that tool of the present invention suppresses second embodiment of the light supply apparatus of surging wave.As shown in the drawing, the light supply apparatus 90 that tool of the present invention suppresses surging wave comprises a crooked fluorescent tube 91 and two shield assemblies 72,73.This embodiment is identical with first embodiment, and unique difference is that the crooked fluorescent tube 91 of second embodiment is U fonts.Therefore, second embodiment only can provide two sections luminance compensation section C1 and C2, but still good compensation effect can be provided.
Figure 10 A shows an example of shield assemblies 72,73 of the present invention, and Figure 10 B is the schematic diagram that shield assemblies 72,73 is incorporated into lamp tube securing holder 132.Shown in Figure 10 A, shield assemblies 72,73 can be that metal bending forms, its curved shape then must cooperate .. shown in Figure 10 B with lamp tube securing holder 132, and after shield assemblies 72,73 is incorporated into lamp tube securing holder 132, the light of the position of fluorescent tube crested can't penetrate.Certainly, shield assemblies 72,73 also can form one with moving frame, that is combines with moving frame in advance.For example, the both sides that two sheet metals are fixed in image signal input port 18 are covered or are weakened light.In addition, shield assemblies 72,73 also can be directly in the appropriate location of fluorescent tube coating (coating) cover layer, to reach the function that weakens light.
Figure 11 shows the falt bed scanner that uses tool of the present invention to suppress the light supply apparatus of surging wave.As shown in figure 11, this falt bed scanner 110 uses tool of the present invention to suppress the light supply apparatus of surging wave, because the length of light supply apparatus can be more near effective sweep width X, therefore between scanning platform 111 and the shell rim can minimization apart from S, and the width W of falt bed scanner 110 also can be dwindled relatively, and designs the narrower scanner of size.Figure 12 shows the schematic diagram of usage platform formula scanner scanning books.Because the S size minimization of falt bed scanner 110 will help the scanning of thick books, that is as shown in figure 12, can avoid the scanning distortion of following recess 122 of books 121 and the existence of shade.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, the sector person can carry out various distortion or change.
Claims (10)
1, a kind of tool suppresses the light supply apparatus of surging wave, be to be installed on an image capture unit to use light source when this image capture unit scanning document is provided, this image capture unit has an image signal input port allows light enter, this light supply apparatus comprises: a crooked fluorescent tube, be to be used for producing light source, and compensate the brightness at two ends by the warp architecture at two ends; It is characterized in that: be provided with
One group of shield assemblies is installed on the part light that covers this fluorescent tube on two side positions of part corresponding to the image signal input port of aforementioned fluorescent tube bending two ends, uses the two ends that suppress this light supply apparatus to surging wave that aforementioned image capture unit caused;
Wherein, aforementioned crooked fluorescent tube is towards the bending of image signal input port.
2, tool according to claim 1 suppresses the light supply apparatus of surging wave, and it is characterized in that: the two ends of aforementioned crooked fluorescent tube are vertical curve.
3, tool according to claim 2 suppresses the light supply apparatus of surging wave, and it is characterized in that: the inner distance at the two ends of aforementioned crooked fluorescent tube is less than the effective scanning distance of aforementioned image capture unit.
4, tool according to claim 1 suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is light tight assembly.
5, tool according to claim 4 suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is a metal.
6, tool according to claim 1 suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is semi-transparent assembly.
7, tool according to claim 1 suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned shield assemblies is to coat on the aforementioned fluorescent tube.
8, tool according to claim 1 suppresses the light supply apparatus of surging wave, and it is characterized in that: aforementioned image capture unit is a falt bed scanner.
9, tool according to claim 8 suppresses the light supply apparatus of surging wave, and it is characterized in that: the aforementioned lights source apparatus is to be fixed on the moving frame of aforementioned falt bed scanner.
10, tool according to claim 9 suppresses the light supply apparatus of surging wave, it is characterized in that: aforementioned shield assemblies and aforementioned moving frame form one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150294 CN1270511C (en) | 2003-07-23 | 2003-07-23 | Light source apparatus with surging wave suppression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150294 CN1270511C (en) | 2003-07-23 | 2003-07-23 | Light source apparatus with surging wave suppression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1571469A CN1571469A (en) | 2005-01-26 |
| CN1270511C true CN1270511C (en) | 2006-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03150294 Expired - Fee Related CN1270511C (en) | 2003-07-23 | 2003-07-23 | Light source apparatus with surging wave suppression |
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| Country | Link |
|---|---|
| CN (1) | CN1270511C (en) |
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- 2003-07-23 CN CN 03150294 patent/CN1270511C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1571469A (en) | 2005-01-26 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Zhongjing Technology Co., Ltd. Assignor: Quanyou Computer Stock-sharing Co., Ltd. Contract fulfillment period: 2006.10.1 to 2016.9.30 contract change Contract record no.: 2008990000355 Denomination of invention: Light source apparatus with surging wave suppression Granted publication date: 20060816 License type: Exclusive license Record date: 2008.9.4 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2006.10.1 TO 2016.9.30 Name of requester: SHANGHAI ZHONGJING TECHNOLOGY CO., LTD. Effective date: 20080904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20150723 |
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| EXPY | Termination of patent right or utility model |