CN114488665A - Reflection preventing device for projection screen - Google Patents
Reflection preventing device for projection screen Download PDFInfo
- Publication number
- CN114488665A CN114488665A CN202210176030.2A CN202210176030A CN114488665A CN 114488665 A CN114488665 A CN 114488665A CN 202210176030 A CN202210176030 A CN 202210176030A CN 114488665 A CN114488665 A CN 114488665A
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- Prior art keywords
- light
- projection screen
- projection
- reflection device
- screen according
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- 230000003405 preventing effect Effects 0.000 title claims description 8
- 230000031700 light absorption Effects 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 21
- 230000008033 biological extinction Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 230000001815 facial effect Effects 0.000 claims 1
- 241000237983 Trochidae Species 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention relates to the technical field of projectors, and discloses an anti-reflection device for a projection screen, which comprises a projection bottom shell, wherein a machine body top shell is detachably mounted on the projection bottom shell; according to the anti-reflection device for the projection screen, the inclined wall surface part is arranged between the carrying shell and the projection lens through the arrangement of the anti-reflection structure, so that stray light in the projection light cannot be reflected and projected through the projection lens when the stray light irradiates the inner wall of the carrying shell through the arrangement of the inclined wall surface part and the prismatic convex strips of the inner wall array of the inclined wall surface part.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to an anti-reflection device for a projection screen.
Background
With the development of projection technology, the projector has been applied to many places in life such as movie & TV and watch, office meeting etc. the projector carries out the projection screening function to projection screen by the camera lens through projection module cooperation light path passageway module finally through the LCD screen, and in the showing in-process, when light passes through LCD screen, stray mapping light shines on LCD screen carries on the casing lateral wall, can produce stronger reflection light and follow the camera lens projection to the screen and correspond the position, seriously influences the user and watches experience.
Disclosure of Invention
It is an object of the present invention to provide an anti-reflection device for a projection screen, which overcomes the above-mentioned drawbacks of the prior art.
The invention is realized by the following technical scheme.
The invention discloses an anti-reflection device for a projection screen, which comprises a carrying shell, wherein a projection lens is arranged in the carrying shell, an inclined installation part is arranged in the carrying shell, a liquid crystal screen is arranged on the inclined installation part, an inclined wall surface part is arranged between the liquid crystal screen and the projection lens, prismatic convex strips with the height of protrusions gradually reduced from bottom to top are arranged on an inner wall array of the inclined wall surface part, light absorption holes are formed in the prismatic convex strip array, inward folding parts are arranged in the light absorption holes, porous light absorption pads are arranged at the bottoms of the inward folding parts, a functional sliding barrel capable of being adjusted in a sliding mode is arranged on the carrying shell, and an inward concave arc groove is formed in the functional sliding barrel.
Further technical scheme, be equipped with the recess that slides in the carrying shell, the function slide cartridge slide set up in the recess that slides, the promotion gleitbretter is installed to the function slide cartridge outside.
According to the further technical scheme, a fixing ring is installed in the carrying shell, and the fixing ring is connected with the outer wall of the projection lens.
According to a further technical scheme, the inner wall of the inner concave arc groove is provided with a black cotton pad.
According to a further technical scheme, an interval is arranged between every two adjacent prismatic convex strips, and the width of the interval is gradually reduced from bottom to top.
According to a further technical scheme, the density of the light absorption holes distributed on the surfaces of the prismatic convex strips is gradually increased from bottom to top.
According to a further technical scheme, the hole type of the light absorption hole is in an outward expansion and inward contraction shape.
According to the further technical scheme, the light absorption holes and the inner wall of the upper side of the inward folding part are smooth and have light reflection effect wall surfaces.
The invention has the beneficial effects that:
the anti-reflection device for the projection screen is provided with the inclined wall surface part between the carrying shell and the projection lens through the arrangement of the anti-reflection structure, so that stray light in the projection light cannot be reflected and put in through the projection lens when irradiating the inner wall of the carrying shell through the arrangement of the inclined wall surface part and the prismatic convex strips of the array of the inner wall of the inclined wall surface part, the stray light irradiating the inner wall of the carrying shell can be butt-jointed and absorbed through the matching of the section forward-inclined triangular structures of the prismatic convex strips and the light absorption holes, the stray light cannot be emitted through entering the light absorption holes so as to realize the absorption effect, the problem that the use experience is influenced because the projection lens projects the stray light to the direction of the projection screen after being reflected is avoided, meanwhile, the arrangement that the convex height of the prismatic convex strips is gradually reduced from bottom to top enables the light reflected by the inner structure and the wall surface to be prevented from being directly reflected by the prismatic convex strips close to the lens, the reflection preventing effect is influenced, and because the prismatic convex strips cannot absorb all reflected light rays, a small part of light rays are reflected all the time, so that the height of the prismatic convex strips far away from the lens is the highest, the reflected light rays can be reflected to a distance far away from the lens to the maximum extent, the light rays are refracted at the part with the prismatic convex strips as far as possible, and the better light ray absorption effect is realized;
the anti-reflection device for the projection screen is characterized in that the light absorption holes are internally provided with the inward-folding parts through the arrangement of the anti-reflection structure, the bottom walls of the inward-folding parts are provided with the porous light absorption pads, the outward-expanding inward-contracting structures of the light absorption holes are matched with the smooth wall surfaces of the inward-folding parts, so that light entering the light absorption holes and passing through the inward-folding parts are reflected and introduced into the bottoms of the inward-folding parts to intercept and absorb the light through the porous structures of the porous light absorption pads, the absorption and interception functions of stray light with higher efficiency are realized, the effect of preventing the light entering the inner part from overflowing is achieved, the intervals are arranged between the adjacent prismatic convex strips and are gradually reduced from bottom to top, the effect of further improving the treatment effect of the stray light by increasing the absorption frequency of the projection lens to the stray light and matching the distribution density of the light absorption holes on the surfaces of the prismatic convex strips closer to the projection lens is achieved, therefore, the problem that the use experience is influenced by projecting stray light outside the projection screen through the projection lens is solved by efficiently absorbing and intercepting the stray light;
according to the anti-reflection device for the projection screen, the carrying shell is provided with the slidably adjustable functional sliding barrel through the arrangement of the anti-reflection structure, the functional sliding barrel is slidably arranged on the outer side of the projection lens, so that the effect of surrounding the outer mirror surface of the projection lens by the inner concave arc groove can be realized through manually adjusting the sliding position of the functional sliding barrel, the anti-interference effect of light just projected by the projection lens from the outer side is realized, and the problems that the outer mirror surface of the projection lens reflects light and influences the projected light due to the existence of other light sources or brighter light in the outside are solved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the ridge-shaped raised strips 28 of FIG. 1;
FIG. 3 is a side sectional structural view of FIG. 2;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1;
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
Combine fig. 1-4 the reflection preventing device for projection screen, including carrying casing 26, carry and install projection lens 24 in the casing 26, be equipped with slope installation department 42 in carrying casing 26, liquid crystal screen 27 is installed to slope installation department 42, is equipped with inclined wall face portion 40 between liquid crystal screen 27 and the projection lens 24, and inclined wall face portion 40 inner wall array is equipped with the protruding height of prism protruding strip 28 that reduces gradually from lower to upper, and the prism protruding strip 28 that is close to lens department is minimum, and prism protruding strip 28 array is equipped with extinction hole 29, is equipped with interior book portion 33 in the extinction hole 29, and interior book portion 33 bottom is equipped with porous extinction pad 34, carries casing 26 to install slidable regulation's function slide 36, and function slide 36 is equipped with interior concave arc groove 38.
When the projector is used, the projector is started, the emitted light is processed by the light path channel structure and then projected to the liquid crystal screen 27 towards the projection lens 24, when the light passes through the liquid crystal screen 27, the stray light irradiated on the inner side wall of the carrying shell 26 is butted and absorbed by the arrangement of the inclined wall surface part 40 and the array prismatic convex strip 28 on the inner wall of the inclined wall surface part 40, the stray light enters the light absorption holes 29 to realize the absorption effect, the problem that the use experience is influenced because the stray light is projected towards the projection screen direction by the projection lens 24 after being reflected is avoided, meanwhile, the light enters the light absorption holes 29 through the outward-expanding and inward-contracting structure of the light absorption holes 29 and is matched with the smooth wall surface of the inward-folding part 33, so that the light entering the light holes 29 and passing through the inward-folding part 33 to realize the reflection of the light entering the interior and the blocking and absorption effects of the light by the porous structure of the porous light absorption pad 34 at the bottom of the inward-folding part, thereby realizing the absorption and interception functions of stray light with higher efficiency and achieving the effect of preventing the overflow of the light entering the projection lens, meanwhile, the function sliding barrel 36 which is arranged outside the projection lens 24 in a sliding way can realize the effect of surrounding the outer mirror surface of the projection lens 24 by the inner concave arc groove 38 by manually adjusting the sliding position of the function sliding barrel 36, thereby achieving the effect of preventing the interference of the light which is just projected by the projection lens 24 from the outside, thereby avoiding the problems that other light sources exist outside or the outer mirror surface of the projection lens 24 reflects light and influences the mapping light due to brighter light, the arrangement that the height of the protruding prismatic convex strips 28 is gradually reduced from bottom to top ensures that the light reflected by the inner structure and the wall surface is prevented from being directly reflected by the prismatic convex strips 28 close to the lens, the anti-reflection effect is influenced, because the prismatic convex strips 28 can not absorb all the reflected light, a small part of the light is reflected all the time, therefore, the height of the prismatic projection strips 28 far away from the lens is the highest, so that the reflected light rays can be reflected to the distance far away from the lens to the maximum extent, and the light rays are refracted at the part with the prismatic projection strips 28 as much as possible, thereby realizing better light ray absorption effect.
Preferably, a sliding groove 41 is formed in the carrying housing 26, the functional slide cylinder 36 is slidably disposed in the sliding groove 41, and the push slide 37 is mounted on the outer side of the functional slide cylinder 36.
The function of adjusting the position of the functional slide 36 relative to the outer mirror surface of the projection lens 24 is realized by manually sliding and pushing the slide piece 37.
Preferably, a fixing ring 32 is mounted in the mounting case 26, and the fixing ring 32 is connected to the outer wall of the projection lens 24.
The effect of securely mounting the projection lens 24 is achieved by the fixing ring 32.
Preferably, a black cotton pad 39 is mounted on the inner wall of the inner concave arc groove 38.
The black cotton pad 39 can avoid the problem that the projection effect is influenced by the reflection of the external light irradiated on the inner wall of the inner concave arc groove 38.
Preferably, a space 30 is provided between adjacent prismatic raised strips 28, and the width of the space 30 is gradually reduced from bottom to top.
The closer to the projection lens 24, the higher the absorption frequency of stray light, and thus the further the stray light treatment effect, is achieved by the interval 30 between adjacent prismatic convex strips 28 being gradually reduced from bottom to top.
Preferably, the density of the light absorbing holes 29 distributed on the surface of the prismatic convex strip 28 from bottom to top is gradually increased.
The absorption efficiency of stray light inside the projection lens 24 is improved by gradually increasing the distribution density of the lens head end light absorption holes 29 near the projection lens 24 and reducing the matching interval.
Preferably, the hole pattern of the light absorbing hole 29 is expanded and contracted.
The outward expansion and inward contraction shape facilitates the light to enter and reduces the problem that the light escapes through reflection.
Preferably, the light absorbing holes 29 and the inner wall of the upper side of the inward folded portion 33 are smooth walls with light reflecting effect.
The effect that light cannot escape is achieved by the smooth reflecting wall surface on the upper side matching the shape of the light absorbing hole 29 and the inward folding part 33.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a projection screen is with preventing reflecting device, includes and carries on the casing, its characterized in that: install projection lens in the carrying case, be equipped with the slope installation department in the carrying case, LCD screen is installed to the slope installation department, LCD screen with be equipped with the inclined wall face between the projection lens, the facial inner wall array of inclined wall is equipped with protruding height of prism protruding strip that gradually reduces from bottom to top, the protruding strip array of prism is equipped with the extinction hole, be equipped with infolding portion in the extinction hole, infolding portion bottom is equipped with porous extinction pad, the carrying case installs slidable regulation's function slide cartridge, the function slide cartridge is equipped with the inner concave arc groove.
2. An anti-reflection device for a projection screen according to claim 1, characterized in that: the carrying shell is internally provided with a sliding groove, the functional sliding barrel is arranged in the sliding groove in a sliding mode, and the outer side of the functional sliding barrel is provided with a pushing sliding sheet.
3. An anti-reflection device for a projection screen according to claim 1, characterized in that: and a fixing ring is arranged in the carrying shell and connected with the outer wall of the projection lens.
4. An anti-reflection device for a projection screen according to claim 1, characterized in that: and a black cotton pad is arranged on the inner wall of the inner concave arc groove.
5. An anti-reflection device for a projection screen according to claim 1, characterized in that: and a gap is arranged between every two adjacent prismatic convex strips, and the width of the gap is gradually reduced from bottom to top.
6. An anti-reflection device for a projection screen according to claim 1, characterized in that: the density of the light absorption holes distributed on the surfaces of the prismatic convex strips is gradually increased from bottom to top.
7. An anti-reflection device for a projection screen according to claim 1, characterized in that: the hole type of the light absorption hole is in an outward expansion and inward contraction shape.
8. An anti-reflection device for a projection screen according to claim 1, characterized in that: the light absorption holes and the inner wall of the upper side of the inward folding part are smooth walls with light reflection effects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210176030.2A CN114488665B (en) | 2022-02-24 | 2022-02-24 | Reflection preventing device for projection screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210176030.2A CN114488665B (en) | 2022-02-24 | 2022-02-24 | Reflection preventing device for projection screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114488665A true CN114488665A (en) | 2022-05-13 |
| CN114488665B CN114488665B (en) | 2024-03-22 |
Family
ID=81484394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210176030.2A Active CN114488665B (en) | 2022-02-24 | 2022-02-24 | Reflection preventing device for projection screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114488665B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004144809A (en) * | 2002-10-22 | 2004-05-20 | Seiko Epson Corp | Electronic equipment equipped with projection lens |
| JP2007078859A (en) * | 2005-09-12 | 2007-03-29 | Seiko Epson Corp | Projector |
| CN201233495Y (en) * | 2008-07-30 | 2009-05-06 | 林璧光 | Telescopic shading cover for camera lens |
| CN103345112A (en) * | 2013-07-05 | 2013-10-09 | 中国科学院半导体研究所 | Forward-direction projector with lens and screen |
| CN109143430A (en) * | 2018-09-30 | 2019-01-04 | 深圳市光科全息技术有限公司 | A kind of light guide structure of ultrashort coke |
| CN111273512A (en) * | 2018-12-04 | 2020-06-12 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN210894983U (en) * | 2019-12-27 | 2020-06-30 | 成都银屏科技有限公司 | Anti-light screen structure based on linear Fresnel lens |
| CN113238407A (en) * | 2021-04-26 | 2021-08-10 | 福州大学 | Light-absorbing black matrix structure for improving display efficiency and preparation method thereof |
| CN215773391U (en) * | 2021-07-01 | 2022-02-08 | 深圳市火乐科技发展有限公司 | Projector and optical machine thereof |
-
2022
- 2022-02-24 CN CN202210176030.2A patent/CN114488665B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004144809A (en) * | 2002-10-22 | 2004-05-20 | Seiko Epson Corp | Electronic equipment equipped with projection lens |
| JP2007078859A (en) * | 2005-09-12 | 2007-03-29 | Seiko Epson Corp | Projector |
| CN201233495Y (en) * | 2008-07-30 | 2009-05-06 | 林璧光 | Telescopic shading cover for camera lens |
| CN103345112A (en) * | 2013-07-05 | 2013-10-09 | 中国科学院半导体研究所 | Forward-direction projector with lens and screen |
| CN109143430A (en) * | 2018-09-30 | 2019-01-04 | 深圳市光科全息技术有限公司 | A kind of light guide structure of ultrashort coke |
| CN111273512A (en) * | 2018-12-04 | 2020-06-12 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN210894983U (en) * | 2019-12-27 | 2020-06-30 | 成都银屏科技有限公司 | Anti-light screen structure based on linear Fresnel lens |
| CN113238407A (en) * | 2021-04-26 | 2021-08-10 | 福州大学 | Light-absorbing black matrix structure for improving display efficiency and preparation method thereof |
| CN215773391U (en) * | 2021-07-01 | 2022-02-08 | 深圳市火乐科技发展有限公司 | Projector and optical machine thereof |
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| Publication number | Publication date |
|---|---|
| CN114488665B (en) | 2024-03-22 |
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