CN1779560A - Rear-projection screen and optical device thereof - Google Patents
Rear-projection screen and optical device thereof Download PDFInfo
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- CN1779560A CN1779560A CN 200410096356 CN200410096356A CN1779560A CN 1779560 A CN1779560 A CN 1779560A CN 200410096356 CN200410096356 CN 200410096356 CN 200410096356 A CN200410096356 A CN 200410096356A CN 1779560 A CN1779560 A CN 1779560A
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- optical element
- light
- protuberance
- cylindrical projection
- projection screen
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Abstract
A rear-projection screen and its optical device consists of an optical element with a cylindrical snug structure on its surface as cylindrical snug structure being set with the first snug and the second snug to be difference in curvity, and a light absorption pattern layer with multiple light absorption units as light absorption pattern layer being set on another surface of optical element.
Description
Technical field
The present invention particularly about a kind of optical devices that are applied to form rear projection screen, on screen causes vision uncomfortable interference line (Moir é) phenomenon to eliminate about a kind of optical devices.
Background technology
Along with popularizing of HDTV and DVD-Player, and the development of the projection display on optical technology heal and become ripe, and the large scale television image more and more is subjected to the attention in market and consumer's favor.
Difference according to the Projection Display mode, can be divided into two kinds of back projection type (Real-Projection) and pre-projecting types (Front-Projection), mainly the eyes according to the audience are to watch image from which direction of screen, see from screen the place ahead and to be referred to as pre-projecting type, otherwise, see from the screen rear then being referred to as back projection type.Now, because the back projection type televisor has advantages such as large screen display function, the price of radiationless line, high definition are low, therefore become the consumption main flow of buying TV gradually.
Please refer to shown in Figure 1, known rear projection screen 1 includes a Fresnel lens (FresnelLens) 11 and a lens pillar (Lanticular Lens) 12, Fresnel lens 11 is a condenser lens, the incident ray that it mainly throws the projection display, deviation is to the direction of vertical screen and make the light Fresnel lens 11 that leaves parallel to each other, and make the light in the ken can do good utilization, and then the brightness and the uniformity coefficient of lifting image, lens pillar 12 is then in order to provide the imaging of image.
The making of black-tape striped 122, know as industrial community, exiting surface prior to lens pillar 12, the photoresistance of coating suitable thickness, then utilize light source irradiation cylindrical projection 121 again, focus on and be projeced on the photoresistance by the light 20 systematicness ground of cylindrical projection 121 light source, carry out the fabrication steps of positive development (or negative development) etc., and produce a plurality of black-tape stripeds 122, because cylindrical projection 121 is regularly arranged, and height curvature is roughly the same, so formation rule is arranged and wait the black-tape striped 122 of width, owing to distance between black-tape striped 122 rules, make the interference that causes light when being applied to projection display system easily, and visually produce interference line (Moir é) phenomenon that is commonly called as, except allowing the beholder produce uncomfortable vision, also reduced the quality of whole image in addition.
From the above, current rear projection screen still has the space of improvement, and the rear projection screen and the optical devices thereof that therefore how to provide a kind of elimination to cause the uncomfortable interference line of vision (Moir é) phenomenon on screen are one of current important problem in fact.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing a kind of rear projection screen and optical devices thereof of interfering the line phenomenon of eliminating.
For reaching above-mentioned purpose, comprise an optical element and light absorption patterned layer according to optical devices of the present invention, wherein, a surface of optical element has a cylindrical projection structure, and the cylindrical projection structure comprises one first different protuberance of curvature parameters and one second protuberance; Light absorbs patterned layer and has a plurality of light absorptive units, and light absorbs on another surface of cylindrical projection structure that patterned layer is arranged at relative optical element.
For reaching above-mentioned purpose, comprise one first optical element, light absorption patterned layer and one second optical element according to rear projection screen of the present invention, wherein, one surface of first optical element has a cylindrical projection structure, and the cylindrical projection structure comprises one first different protuberance of curvature parameters and one second protuberance; Light absorbs patterned layer and has a plurality of light absorptive units, and light absorbs on another surface of cylindrical projection structure that patterned layer is arranged at relative optical element; Second optical element is adjacent to first optical element.
From the above, because of utilizing an optical element with the different cylindrical projection structure of curvature parameters according to rear projection screen of the present invention and optical devices thereof, because the protuberance curvature parameters of cylindrical projection structure is different so can make incident ray change regular focal position, cause the light of the light absorptive unit that does not wait width to absorb patterned layer simultaneously, thereby feasible rear projection screen with this optical devices combination, the irregular variation that goes out optical range by light, and then eliminate and cause visually uncomfortable interference line phenomenon.
Description of drawings
Fig. 1 is the schematic perspective view of the known rear projection screen of a demonstration;
Fig. 2 is the diagrammatic cross-section of the known rear projection screen of a demonstration;
Fig. 3 is the diagrammatic cross-section of a demonstration according to the optical devices of preferred embodiment of the present invention;
Fig. 4 is the diagrammatic cross-section of a demonstration according to another optical devices of preferred embodiment of the present invention;
Fig. 5 is the synoptic diagram of a demonstration according to the optical devices of another preferred embodiment of the present invention;
Fig. 6 A～6E is the one group diagrammatic cross-section of a demonstration according to the another optical devices of preferred embodiment of the present invention;
Fig. 7 is the again diagrammatic cross-section of optical devices of a demonstration according to preferred embodiment of the present invention; And
Fig. 8 is the synoptic diagram of a demonstration according to the rear projection screen of preferred embodiment of the present invention.
The component symbol explanation:
1 rear projection screen
11 Fresnel lenses
12 lens pillars
121 cylindrical projection
122 black-tape stripeds
123 non-focusing portions
2 optical devices
20 light
21 optical elements
The 21A light entrance face
The 21B exiting surface
211 first protuberances
212 second protuberances
213 the 3rd protuberances
22 light absorb patterned layer
221 light absorptive units
The P focus point
P ' focus point
23 light diffusion layers
24 anti-reflecting layers
3 rear projection screens
30 second optical elements
31 first optical elements
32 light absorb patterned layer
The 41A light entrance face
Embodiment
Hereinafter with reference to relevant drawings, rear projection screen and optical devices thereof according to preferred embodiment of the present invention are described, wherein components identical will be illustrated with identical reference marks.
Please refer to shown in Figure 3ly, comprise an optical element 21 and a light absorbs patterned layer 22 according to the optical devices 2 of preferred embodiment of the present invention.
One surface of optical element 21 has a cylindrical projection structure, the cylindrical projection structure is carried out the imaging effect after the parallel rays of incident can being focused on, as shown in Figure 3, this cylindrical projection structure comprises one first protuberance 211 and one second protuberance 212, and the curvature parameters of first protuberance 211 and second protuberance 212 is different.Wherein, optical element 21 can be a lens pillar.
Light absorbs on another surface of cylindrical projection structure that patterned layer 22 is arranged at relative optical element 21, promptly on the exiting surface 21B with respect to the light entrance face 21A of optical element 21, from the above, light absorbs patterned layer 22 and has a plurality of light absorptive units 221, in processing procedure, the exiting surface 21B that is formed at relative optical element 21 that light absorbs patterned layer 22 goes up the coating positive development or the photoresistance of negative development, after the irradiation by light, the light that in optical element 21, focuses on the back and give out, the photoresistance that is subjected to light exposure is developed and removable (positive development photoresistance) or develop after still be attached to exiting surface 21B and go up (negative development photoresistance), thereby form the patterned layer that constitutes by a plurality of light absorptive units 221, because the focus point P of incident light in optical element 21, P ' position is different, and cause out optical range also different, so the width of the light absorptive unit 211 that forms is also inequality.
From the above, more because the curvature parameters of the protuberance of cylindrical projection structure is different, therefore, the optical devices 2 of this structure of tool are eliminated because go out between the optical range apart from the consistent interference line phenomenon that is caused by the variation of light incident rear focal point position in order in imaging process.
Again, as shown in Figure 4, cylindrical projection structure according to the optical devices 2 of preferred embodiment of the present invention more comprises one the 3rd protuberance 213, its curvature parameters is different from the curvature parameters of first protuberance 211 or second protuberance 212, in order to cause light to go out the variation of optical range, eliminate the purpose of interfering the line effect to reach, certainly, in the present embodiment, optical devices 2 more can comprise the 4th protuberance, the 5th protuberance that curvature parameters is different from the curvature parameters of first protuberance 211 or second protuberance 212 .... or the like application.Wherein, the curvature parameters of these protuberances 211,212,213 of cylindrical projection structure changes and can have regularity, and for example 2 times, 3 times, 6 times etc. rule changes, or can be not have a combination that rule changes.
In the present embodiment, the curvature parameters of these protuberances 211,212,213 can be done variation (shown in Fig. 3 and 4) according to non-being positioned at of light entrance face 21A on the same reference horizontal line, can also be positioned at the variation (as shown in Figure 5) of doing curvature parameters on the same reference horizontal line according to light entrance face 41A, the focus point difference that incident ray is focused on, and then have the different variation of optical range.
From the above, optical devices 2 according to preferred embodiment of the present invention more comprise a light diffusion layer 23, it is arranged on another surface of the relative cylindrical projection structure of this optical element 21, so, it is provided with the position, can be formed at light absorbs on the patterned layer 22 and (as shown in Figure 6A) that cover, or can be formed at optical element 21 and light absorbs between the patterned layer 22 (shown in Fig. 6 B), in addition, optical devices 2 also can more comprise an anti-reflecting layer 24, it also can be arranged at light and absorb on the patterned layer 22, as mentioned above, anti-reflecting layer 24 the position is set, can be formed at light absorbs on the patterned layer 22 and (shown in Fig. 6 C) that cover, or can be formed at optical element 21 and light absorbs between the patterned layer 22 (shown in Fig. 6 D), in addition, more can be that light diffusion layer 23 and anti-reflecting layer 24 are combined to form mutually between (shown in Fig. 6 E) or optical element 21 on the light absorption patterned layer 22 and light absorption patterned layer 22, when making these optical devices 2 be applied to rear projection screen with these a little structures, can reach the purpose that increases visual angle and light intensity, and then improve the quality of rear projection screen.
Again, as shown in Figure 7, in the present embodiment, can insert light diffusion particulate in the optical element 21 of optical devices 2, make optical devices 2, more can make image brilliance have more homogeneity except increasing the visual angle.
Please refer to shown in Figure 8ly again,, comprise one first optical element 31, a light and absorb patterned layer 32 and one second optical element 30 according to the rear projection screen 3 of preferred embodiment of the present invention.
First optical element 31 is above-mentioned optical element 21, its structure, composition and feature are as described above, so repeat no more, and in the present embodiment, second optical element 30 is adjacent to first optical element 31, in order to be combined to form rear projection screen 3 with above-mentioned first optical element 31, wherein, second optical element 30 is Fresnel lens (Fresnel Lens), it retrodeviates the refractive power line with the light-ray condensing that light source comes, make the light that leaves Fresnel lens become light parallel to each other going into to inject lens pillar, and carry out imaging.
In sum, rear projection screen and optical devices thereof according to preferred embodiment of the present invention, utilize optical element (first optical element) to have the cylindrical projection structure of the protuberance combination of different curvature parameter, in order to do making the focus point that can produce diverse location after the light incident, and then make the optical range that of light that irregular variation be arranged, these optical devices are applied to rear projection screen, reach to eliminate and allow the purpose of interference line effect of the uncomfortable impression of vision, and then improve the quality of rear projection screen.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.
Claims (13)
1. optical devices is characterized in that, comprise:
One optical element, its one of the surface have a cylindrical projection structure, this cylindrical projection structure comprises one first different protuberance of curvature parameters and one second protuberance; And
One light absorbs patterned layer, and it has a plurality of light absorptive units, and this light absorbs on another surface that patterned layer is arranged at the cylindrical projection structure of this optical element relatively.
2. optical devices as claimed in claim 1 is characterized in that, this cylindrical projection structure more comprises:
One the 3rd protuberance, its curvature parameters are different from the curvature parameters of this first protuberance or this second protuberance.
3. optical devices as claimed in claim 1 is characterized in that, this optical element is a lens pillar.
4. optical devices as claimed in claim 1 is characterized in that, more comprise:
One light diffusion layer, it is arranged on another surface of the relative cylindrical projection structure of this optical element.
5. optical devices as claimed in claim 1 is characterized in that, are filled with light diffusion particulate in this optical element.
6. optical devices as claimed in claim 1 is characterized in that the sectional width of these light absorptive units is different each other.
7. a rear projection screen is characterized in that, comprises:
One first optical element, its one of the surface have a cylindrical projection structure, this cylindrical projection structure comprises one first different protuberance of curvature parameters and one second protuberance;
One light absorbs patterned layer, and it has a plurality of light absorptive units, and this light absorbs on another surface that patterned layer is arranged at the cylindrical projection structure of this optical element relatively; And
One second optical element, it is adjacent to this first optical element.
8. rear projection screen as claimed in claim 7 is characterized in that, this cylindrical projection structure more comprises:
One the 3rd protuberance, its curvature parameters are different from the curvature parameters of this first protuberance or this second protuberance.
9. rear projection screen as claimed in claim 7 is characterized in that, this first optical element is a lens pillar.
10. rear projection screen as claimed in claim 7 is characterized in that, this second optical element is a Fresnel lens.
11. rear projection screen as claimed in claim 7 is characterized in that, more comprises:
One light diffusion layer, it is arranged on another surface of the relative cylindrical projection structure of this optical element.
12. rear projection screen as claimed in claim 7 is characterized in that, is filled with light diffusion particulate in this first optical element.
13. rear projection screen as claimed in claim 7 is characterized in that, the sectional width of these light absorptive units is different each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410096356 CN1779560A (en) | 2004-11-26 | 2004-11-26 | Rear-projection screen and optical device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410096356 CN1779560A (en) | 2004-11-26 | 2004-11-26 | Rear-projection screen and optical device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1779560A true CN1779560A (en) | 2006-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410096356 Pending CN1779560A (en) | 2004-11-26 | 2004-11-26 | Rear-projection screen and optical device thereof |
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| CN (1) | CN1779560A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7830605B2 (en) | 2006-11-10 | 2010-11-09 | Fuji Xerox Co., Ltd. | Longitudinal interference fringe pattern projection lens, optical system, and three-dimensional image acquisition apparatus |
| CN101956950B (en) * | 2009-07-15 | 2012-09-05 | 颖台科技股份有限公司 | Optical thin plate and manufacture method thereof as well as backlight module |
| CN107367897A (en) * | 2016-05-12 | 2017-11-21 | 深圳市光峰光电技术有限公司 | A kind of projection screen |
| CN107367898A (en) * | 2016-05-12 | 2017-11-21 | 深圳市光峰光电技术有限公司 | The preparation method and dependent projections screen of a kind of projection screen |
| CN107632490A (en) * | 2016-07-19 | 2018-01-26 | 深圳市光峰光电技术有限公司 | A kind of reflective micro-structural, projection screen and optical projection system |
-
2004
- 2004-11-26 CN CN 200410096356 patent/CN1779560A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7830605B2 (en) | 2006-11-10 | 2010-11-09 | Fuji Xerox Co., Ltd. | Longitudinal interference fringe pattern projection lens, optical system, and three-dimensional image acquisition apparatus |
| CN101956950B (en) * | 2009-07-15 | 2012-09-05 | 颖台科技股份有限公司 | Optical thin plate and manufacture method thereof as well as backlight module |
| CN107367897A (en) * | 2016-05-12 | 2017-11-21 | 深圳市光峰光电技术有限公司 | A kind of projection screen |
| CN107367898A (en) * | 2016-05-12 | 2017-11-21 | 深圳市光峰光电技术有限公司 | The preparation method and dependent projections screen of a kind of projection screen |
| CN107367898B (en) * | 2016-05-12 | 2019-05-03 | 深圳光峰科技股份有限公司 | A kind of production method and dependent projections screen of projection screen |
| CN107367897B (en) * | 2016-05-12 | 2019-05-03 | 深圳光峰科技股份有限公司 | A kind of projection screen |
| CN107632490A (en) * | 2016-07-19 | 2018-01-26 | 深圳市光峰光电技术有限公司 | A kind of reflective micro-structural, projection screen and optical projection system |
| CN107632490B (en) * | 2016-07-19 | 2020-10-16 | 深圳光峰科技股份有限公司 | Light reflection microstructure, projection screen and projection system |
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