CN201876655U - Front projector contrast regulating system - Google Patents
Front projector contrast regulating system Download PDFInfo
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- CN201876655U CN201876655U CN2010202268676U CN201020226867U CN201876655U CN 201876655 U CN201876655 U CN 201876655U CN 2010202268676 U CN2010202268676 U CN 2010202268676U CN 201020226867 U CN201020226867 U CN 201020226867U CN 201876655 U CN201876655 U CN 201876655U
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Abstract
The utility model discloses a front projector contrast regulating system, comprising a base as well as a driving assembly, a transmission assembly and two contrast catches, wherein the driving assembly, the transmission assembly and the two contrast catches are respectively arranged on the base, and the two contrast catches are arranged on the transmission assembly. The two contrast catches are arranged along a straight-line track side by side and form a light-dimming merged surface for changing the strength of projection light beams by controlling the opening angles of the contrast catches, and the driving assembly is connected with the transmission assembly and can be used for controlling the opening and closing actions of the two contrast catches. The front projector contrast control system has a reasonable structure, and a luminous flux is correspondingly controlled by controlling the opening and closing angles of the two contrast catches to change the intensity of the light beams in the center of an optical axis, therefore the display contrasts of images are changed, and the visual effect can be effectively improved to ensure that people have better enjoyment; and in addition, the front projector contrast control system has a simple structure, a scientific design and low manufacturing cost without changing an optical engine, and the shapes of the contrast catches can be designed according to the sizes and contrasts of required front projectors so that the front projector contrast control system has wider application range.
Description
Technical field
The utility model relates to projector, particularly a kind of front projection machine contrast adjustment system.
Background technology
Recently, along with the development of information industry, the demand of the image display of the image that can show big picture is constantly increased.Can show that projection image's display device is widely used in the image display of large-scale picture image, wherein especially DLP (digital processing) projection arrangement carries DMD (digital indicator) for the reproduction that improves primary colors, thereby can obtain that the visual angle is wide, contrast is high, the large colour of high definition portrait, therefore in current projection receiver, win people's favor most.
Front projector is widely used in the various places as a kind of convenient and practical image display.Existing front projector generally is light a series of optical element of process such as the display devices such as guiding liquid crystal display such as integration rod, lens combination that light source is sent, and the light after this display device modulation projects display frame on the screen through a series of projecting lens apparatus again.Wherein,, generally can on described front projector opticpath, an aperture be set, regulate the intensity of light, thereby reach the purpose that improves contrast by this aperture in order to improve the contrast of front projector.But, existing aperture adopts mechanical type moving vane structure, promptly, with a plurality of mobilizable blade combinations, relative position and relative angle by the control blade, make a plurality of blades constitute the unthreaded hole of a variable size altogether, change light intensity, thereby improve the contrast of front projector thereby control luminous flux by the variation of this unthreaded hole.Yet this kind iris diaphragm structure complexity, complex manufacturing, thereby make cost can not be in any more, the control complexity of this aperture needs to revise light engine in addition, improves the environment temperature of IRIS mechanism, expense is high especially, whole optical system needs redesign, checking, thereby has increased the complexity of the running of front projector, to the very big influence of quality generation of front projector.
The utility model content
The purpose of this utility model is, a kind of scientific structure design, rationally simple is provided, and need not to change light engine, and preparation cost is low, and can effectively regulate the front projection machine contrast adjustment system of the contrast of front projector.
The technical scheme that the utility model is adopted for achieving the above object is:
A kind of front projection machine contrast adjustment system, it comprises a base, it comprises that also the driven unit, the transmission component and two that are separately positioned on this base are arranged on the contrast catch on this transmission component, track is side by side along a straight line for this two contrasts catch, and form a light modulation that changes projected light beam intensity by the folding angle of controlling it and merge face, described driven unit links to each other with transmission component, and can control the opening and closing movement of two contrast catch by it.
Described transmission component comprises four gears, and wherein gear A is connected with step motor and meshes with gear B, gear B and gear C engagement, gear C and gear D engagement.
Described gear C is a discshaped body, and its outer rim is provided with one and is about the long driving cog of 1/2nd circular arcs, and preceding half section of this driving cog is meshed with described gear B, and the second half section is meshed with described gear D.
Described gear D is one to be about the sector gear of quadrant arc length.
The appearance profile shape of described two contrast catch is identical, and symmetry is fixed on described gear C, the gear D respectively, and can be with its synchronous rotation.
Be symmetrical in respectively and respectively be provided with a plurality of interconnective arcuation boss on the relative both sides end face of two contrast catch.
Be symmetrical in respectively on the relative both sides end face of two contrast catch, the position of corresponding described projected light beam respectively is provided with a recess, and the bottom of this recess is provided with arcuation projection A, and respectively is provided with arcuation projection B in the symmetria bilateralis of this recess.
Be symmetrical in respectively on the relative both sides end face of two contrast catch, the position of corresponding described projected light beam respectively is provided with a recess, the bottom of this recess is provided with arcuation projection C, and in the both sides of this recess, nearly this recess one end symmetry respectively is provided with an arcuation groove, and far this recess one end symmetry respectively is provided with the protruding position of an arcuation that is connected with this arcuation groove.
Described driven unit comprises one drive circuit and the position transducer and the motor that are connected with this driving circuit respectively, the driving shaft of this motor is connected with described gear A, described position transducer is arranged on gear C below by a support, and be provided with in this gear C bottom one with the suitable arcuation scale raised line of this position transducer.
Described motor is a step motor.
The beneficial effects of the utility model are: the utility model is rational in infrastructure, by controlling the folding angle of two contrast catch, correspondingly control luminous flux to change the intensity of optical axis center light beam, show contrast, can effectively improve visual effect thereby change image, bring preferable enjoyment to people, and it is simple in structure, and design science need not to change light engine, preparation cost is low, is beneficial to popularization.Its operation is also comparatively convenient in addition, when need are regulated image demonstration contrast or shutdown, only need to come control Driver Circuit to send action command by software, just may command CD-ROM drive motor driven gear B and gear C rotate, thereby force two contrast catch to do opening and closing movement, meanwhile, respond to the folding angle of two contrast catch by position transducer, and timely feedback position information and correction position, show contrast to obtain corresponding image.And two the contrast catch can adopt the design of different structure, with the different contrast demand of the front projection machine that satisfies different size, range of application is wider.
Below in conjunction with accompanying drawing and embodiment, the utility model is further specified.
Description of drawings
Fig. 1 is the perspective view of the utility model first embodiment;
Fig. 2 is the plan structure synoptic diagram of Fig. 1;
Fig. 3 is the decomposition texture synoptic diagram of Fig. 1;
Fig. 4 is the forward sight structural representation of Fig. 1;
Fig. 5 is the forward sight structural representation of the utility model second embodiment;
Fig. 6 is the forward sight structural representation of the utility model the 3rd embodiment.
Embodiment
First embodiment: referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model is an a kind of front projection machine contrast adjustment system, it comprises a base 1, it comprises that also the driven unit 2, the transmission component 3 and two that are separately positioned on this base 1 are arranged on the contrast catch 4 on this transmission component 3, track is side by side along a straight line for this two contrasts catch 4, and form a light modulation that changes projected light beam intensity by the folding angle of controlling it and merge face, described driven unit 2 links to each other with transmission component 3, and can control the opening and closing movement of two contrast catch 4 by it.Described transmission component 3 comprises four gears, wherein gear A 30 meshes with gear B 31, gear B 31 and gear C 32 engagements, gear C 32 and gear D 33 engagements, described gear C 32 is a discshaped body, its outer rim is provided with one and is about the long driving cog of 1/2nd circular arcs, and preceding half section of this driving cog is meshed with described gear B 31, and the second half section is meshed with described gear D 33.Described gear D 33 is one to be about the sector gear of quadrant arc length.Described driven unit 2 comprises one drive circuit and position transducer 21 that is connected with this driving circuit respectively and motor 22, the driving shaft of this motor 22 is connected with described gear A 31, and in the present embodiment, described motor 22 is a step motor, among other embodiment, can adopt other driving arrangement.Described position transducer 21 is arranged on gear C 32 belows by a support 11, and be provided with in these gear C 32 bottoms one with the suitable arcuation scale raised line 34 of this position transducer 21.The appearance profile shape of described two contrast catch 4 is identical, and symmetry is fixed on described gear C 32, the gear D 33 respectively, and can be with its synchronous rotation.Be symmetrical in respectively on the relative both sides end face of two contrast catch 4 and respectively be provided with a plurality of interconnective arcuation boss.
Second embodiment: referring to Fig. 5, the distinctive points of itself and first embodiment is different at the appearance profile of two contrast catch; It is to be symmetrical in respectively on the relative both sides end face of two contrast catch 4, and the position of corresponding described projected light beam respectively is provided with a recess 42, and the bottom of this recess 42 is provided with arcuation projection A43, and respectively is provided with arcuation projection B44 in the symmetria bilateralis of this recess 42.With the different contrast demand of the front projection machine that satisfies different size, range of application is wider.
The 3rd embodiment: referring to Fig. 6, the distinctive points of itself and first and second embodiment still is that the appearance profile of two contrast catch 4 is different; It is to be symmetrical in respectively on the relative both sides end face of two contrast catch 4, the position of corresponding described projected light beam respectively is provided with a recess 45, the bottom of this recess 45 is provided with arcuation projection C46, and in the both sides of this recess 45, nearly these recess 45 1 end symmetries respectively are provided with an arcuation groove 47, and far these recess 45 1 end symmetries respectively are provided with the protruding position 48 of an arcuation that is connected with this arcuation groove 47.With the different contrast demand of the front projection machine that satisfies different size, range of application is wider.
When need are regulated image demonstration contrast or shutdown, come control Driver Circuit to send action command by software, thereby controlling and driving motor 22 driven gear C32 and gear D 33 rotate, to force two contrast catch 4 to do opening and closing movement, meanwhile, respond to the folding angle of two contrast catch 4 by position transducer 21, and timely feedback position information and correction position, show contrast to obtain corresponding image, easy to operate, bring preferable visual enjoyment to people simultaneously.
As described in the utility model embodiment, with other contrast adjustment systems of the same or similar structure of the utility model, all in the utility model protection domain.
Claims (10)
1. front projection machine contrast adjustment system, it comprises a base, it is characterized in that: it comprises that also the driven unit, the transmission component and two that are separately positioned on this base are arranged on the contrast catch on this transmission component, track is side by side along a straight line for this two contrasts catch, and form a light modulation that changes projected light beam intensity by the folding angle of controlling it and merge face, described driven unit links to each other with transmission component, and can control the opening and closing movement of two contrast catch by it.
2. front projection machine contrast adjustment according to claim 1 system is characterized in that described transmission component comprises four gears, wherein gear A be connected with step motor and with the gear B engagement, gear B and gear C engagement, gear C and gear D mesh.
3. front projection machine contrast adjustment according to claim 2 system, it is characterized in that described gear C is a discshaped body, its outer rim is provided with one and is about the long driving cog of 1/2nd circular arcs, preceding half section of this driving cog is meshed with described gear B, and the second half section is meshed with described gear D.
4. front projection machine contrast adjustment according to claim 2 system is characterized in that, described gear D is one to be about the sector gear of quadrant arc length.
5. front projection machine contrast adjustment according to claim 2 system it is characterized in that the appearance profile shape of described two contrast catch is identical, and symmetry is fixed on described gear C, the gear D respectively, and can be with its synchronous rotation.
6. front projection machine contrast adjustment according to claim 5 system is characterized in that, is symmetrical in respectively and respectively is provided with a plurality of interconnective arcuation boss on the relative both sides end face of two contrast catch.
7. front projection machine contrast adjustment according to claim 5 system, it is characterized in that, be symmetrical in respectively on the relative both sides end face of two contrast catch, the position of corresponding described projected light beam respectively is provided with a recess, the bottom of this recess is provided with arcuation projection A, and respectively is provided with arcuation projection B in the symmetria bilateralis of this recess.
8. front projection machine contrast adjustment according to claim 5 system, it is characterized in that, be symmetrical in respectively on the relative both sides end face of two contrast catch, the position of corresponding described projected light beam respectively is provided with a recess, the bottom of this recess is provided with arcuation projection C, and in the both sides of this recess, closely this recess one end symmetry respectively is provided with an arcuation groove, and far this recess one end symmetry respectively is provided with the protruding position of an arcuation that is connected with this arcuation groove.
9. front projection machine contrast adjustment according to claim 2 system, it is characterized in that, described driven unit comprises one drive circuit and the position transducer and the motor that are connected with this driving circuit respectively, the driving shaft of this motor is connected with described gear A, described position transducer is arranged on gear C below by a support, and be provided with in this gear C bottom one with the suitable arcuation scale raised line of this position transducer.
10. front projection machine contrast adjustment according to claim 9 system is characterized in that described motor is a step motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202268676U CN201876655U (en) | 2010-06-03 | 2010-06-03 | Front projector contrast regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202268676U CN201876655U (en) | 2010-06-03 | 2010-06-03 | Front projector contrast regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876655U true CN201876655U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202268676U Expired - Fee Related CN201876655U (en) | 2010-06-03 | 2010-06-03 | Front projector contrast regulating system |
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| CN (1) | CN201876655U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317146A (en) * | 2014-11-04 | 2015-01-28 | 深圳市安曼特微显示科技有限公司 | Projector and contrast control structure |
| CN109031866A (en) * | 2018-06-25 | 2018-12-18 | 北京中新联科技股份有限公司 | A kind of laser cartoon display methods |
| CN113341638A (en) * | 2020-02-18 | 2021-09-03 | 松下知识产权经营株式会社 | Gear driving mechanism, light modulation device and projector |
-
2010
- 2010-06-03 CN CN2010202268676U patent/CN201876655U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317146A (en) * | 2014-11-04 | 2015-01-28 | 深圳市安曼特微显示科技有限公司 | Projector and contrast control structure |
| CN109031866A (en) * | 2018-06-25 | 2018-12-18 | 北京中新联科技股份有限公司 | A kind of laser cartoon display methods |
| CN109031866B (en) * | 2018-06-25 | 2020-12-18 | 北京中新联科技股份有限公司 | Laser animation display method |
| CN113341638A (en) * | 2020-02-18 | 2021-09-03 | 松下知识产权经营株式会社 | Gear driving mechanism, light modulation device and projector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20190603 |