CN114488665B - Reflection preventing device for projection screen - Google Patents
Reflection preventing device for projection screen Download PDFInfo
- Publication number
- CN114488665B CN114488665B CN202210176030.2A CN202210176030A CN114488665B CN 114488665 B CN114488665 B CN 114488665B CN 202210176030 A CN202210176030 A CN 202210176030A CN 114488665 B CN114488665 B CN 114488665B
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- China
- Prior art keywords
- projection
- light
- projection screen
- light absorption
- wall
- Prior art date
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- 230000031700 light absorption Effects 0.000 claims description 33
- 230000000694 effects Effects 0.000 claims description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 241000237983 Trochidae Species 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
-
- 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
Abstract
The invention relates to the projector related technical field and discloses an anti-reflection device for a projection screen, which comprises a projection bottom shell, wherein the projection bottom shell is detachably provided with an organism top shell, a structure carrying cavity is arranged between the projection bottom shell and the organism top shell, a projection module is arranged in the structure carrying cavity, the right side of the projection module is provided with a light path channel module, and an anti-reflection module is arranged in the structure carrying cavity; according to the anti-reflection device for the projection screen, the inclined wall surface is arranged between the carrying shell and the projection lens through the arrangement of the anti-reflection structure, so that the stray light rays in the projection light rays cannot be reflected and thrown through the projection lens when the stray light rays irradiate the inner wall of the carrying shell through the arrangement of the inclined wall surface and the prismatic protruding strips of the array of the inner wall of the inclined wall surface.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to an anti-reflection device for a projection screen.
Background
Along with the development of projection technology, projectors are applied to many places in life such as video watching and office conferences, and the like, and the projectors are matched with a light path channel module through a projection module to finally perform projection and projection functions from a lens to a projection screen through a liquid crystal screen.
Disclosure of Invention
The present invention is directed to an anti-reflective 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 relates to 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 part is arranged between the liquid crystal screen and the projection lens, prismatic protruding strips with the protruding height gradually decreasing from bottom to top are arranged on the inner wall array of the inclined wall part, light absorption holes are arranged on the prismatic protruding strip array, an inward folded part is arranged in the light absorption holes, a porous light absorption pad is arranged at the bottom of the inward folded part, a functional sliding cylinder capable of being adjusted in a sliding mode is arranged in the carrying shell, and an inward concave arc groove is formed in the functional sliding cylinder.
Further technical scheme, carry on and be equipped with the recess that slides in the casing, the function slide cylinder slide set up in the recess that slides, the promotion gleitbretter is installed in the function slide cylinder outside.
According to a further technical scheme, a fixing ring is arranged in the carrying shell, and the fixing ring is connected with the outer wall of the projection lens.
According to a further technical scheme, a black cotton pad is arranged on the inner wall of the inner concave arc groove.
According to a further technical scheme, a space is arranged between adjacent prismatic protruding strips, and the width of the space is gradually reduced from bottom to top.
According to a further technical scheme, the density of the light absorption holes distributed on the surface of the prismatic protruding strip from bottom to top is gradually increased.
According to a further technical scheme, the light absorption hole patterns are of an outward expansion and inward contraction shape.
According to a further technical scheme, the light absorption holes and the inner wall of the upper side of the inward folded part are smooth wall surfaces with light reflection effect.
The invention has the beneficial effects that:
according to the anti-reflection device for the projection screen, the inclined wall surface is arranged between the carrying shell and the projection lens through the arrangement of the anti-reflection structure, so that the reflection of the scattered light in the projection light cannot be carried out when the scattered light irradiates the inner wall of the carrying shell and is thrown through the projection lens through the arrangement of the inclined wall surface and the array prismatic protruding strips on the inner wall of the inclined wall surface, the abutting absorption of the scattered light irradiated on the inner wall of the carrying shell can be realized through the matching of the cross section front inclined triangular structure of the prismatic protruding strips with the light absorption holes, the scattered light cannot be emitted into the light absorption holes so as to realize the absorption effect, the problem that the use experience is influenced due to the fact that the scattered light is projected to the projection screen through the projection lens after reflection is avoided, meanwhile, the prismatic protruding height is gradually reduced from bottom to top, the light reflected by the inner structure and the wall surface is prevented from being directly reflected by the prismatic protruding strips close to the lens, and the anti-reflection effect is influenced, and because the prismatic protruding strips cannot absorb all the reflected light, a small part of the reflected light is always reflected back, the prismatic protruding strips far away from the lens are highest in height, the reflection effect is realized, and the reflected light is better in the distance of the prismatic protruding strips;
according to the anti-reflection device for the projection screen, through the arrangement of the anti-reflection structure, the inner folded part is arranged in the light absorption hole, the porous light absorption pad is arranged at the bottom wall of the inner folded part, the light absorption hole is formed in a way that the outer expanding and inner shrinking structure of the light absorption hole is matched with the smooth wall surface of the inner folded part, the light entering the light absorption hole is reflected through the inner folded part, the light is led into the bottom of the inner folded part to be intercepted and absorbed through the porous structure of the porous light absorption pad, so that the high-efficiency absorption and interception functions of the stray light are realized, the effect of preventing the entering the inside from overflowing is achieved, the interval is arranged between the adjacent prismatic protruding strips, and each interval is gradually reduced from bottom to top, so that the higher the absorption frequency of the stray light is closer to the projection lens, the distribution density of the light absorption holes is further improved through the matching with the prismatic protruding strip surface of the closer to the projection lens, and the problem that the stray light is prevented from being influenced by using experience when the projection lens is effectively absorbed and intercepted;
according to the anti-reflection device for the projection screen, through the arrangement of the anti-reflection structure, the carrying shell is provided with the functional sliding cylinder capable of being adjusted in a sliding mode, and the functional sliding cylinder is arranged on the outer side of the projection lens in a sliding mode, so that the effect of surrounding the outer mirror surface of the projection lens by the inner concave arc groove can be achieved through manual adjustment of the sliding position of the functional sliding cylinder, the anti-interference effect of the outer side on light rays just projected by the projection lens is achieved, and the problems that reflection exists on the outer mirror surface of the projection lens and mapping light rays are affected due to the fact that other light sources exist on the outside or are brighter are avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic illustration of the structure of the prismatic raised bar 28 of FIG. 1;
FIG. 3 is a schematic cross-sectional side 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 convenience of description, the orientations described below are now defined as follows: the vertical, horizontal, front-rear directions described below are identical to the vertical, horizontal, front-rear directions of the projection relationship of fig. 1 itself.
The anti-reflection device for a projection screen described with reference to fig. 1-4 comprises a carrying shell 26, a projection lens 24 is installed in the carrying shell 26, an inclined installation part 42 is arranged in the carrying shell 26, a liquid crystal screen 27 is installed on the inclined installation part 42, an inclined wall part 40 is arranged between the liquid crystal screen 27 and the projection lens 24, prismatic protruding strips 28 with gradually reduced protruding heights from bottom to top are arranged on an inner wall array of the inclined wall part 40, the prismatic protruding strips 28 close to the lens are lowest, a light absorption hole 29 is arranged on the prismatic protruding strips 28 array, an inner folded part 33 is arranged in the light absorption hole 29, a porous light absorption pad 34 is arranged at the bottom of the inner folded part 33, a functional sliding cylinder 36 capable of being slidably adjusted is installed on the carrying shell 26, and a concave arc groove 38 is arranged on the functional sliding cylinder 36.
During use, the projector is used for starting, the projection light is thrown into the liquid crystal screen 27 towards the direction of the projection lens 24 after being processed through the light path channel structure, after the light passes through the liquid crystal screen 27, the projection light is reflected by the inclined wall surface 40 and the arrangement of the prismatic convex strips 28 arrayed on the inner wall of the inclined wall surface 40, the stray light irradiated on the inner side wall of the carrying shell 26 is subjected to butt joint absorption, the stray light enters the light absorption holes 29 to realize absorption effects, the problem that the projection lens 24 projects towards the direction of the projection screen after reflection of the stray light is prevented from influencing the use experience is avoided, meanwhile, the light enters the light absorption holes 29 through the light absorption holes 29, the external expansion and contraction structure of the light absorption holes 29 is matched with the smooth wall surface of the inner refraction part 33, the light entering the light absorption holes 29 is enabled to reflect the light entering the inside and be led to the porous structure of the inner refraction part bottom through the porous light absorption pad 34 to intercept the absorption effects, thereby the higher efficient absorption interception function of the stray light is realized, the effect of preventing the light entering the inside from overflowing is achieved, meanwhile, the functional sliding cylinder 36 is arranged on the outer side of the projection lens 24 in a sliding mode, the problem that the use experience is influenced by the projection lens 24 is avoided, meanwhile, the light passes through the manual adjustment of the sliding position of the sliding cylinder 36, the sliding effect is prevented from being influenced by the inner reflection lens 24, the light is prevented from being reflected by the inner reflection hole 38, the light is prevented from being influenced by the reflection light is led to the outside the reflection lens 28, the external reflection effect is prevented from being influenced by the outside, the reflection lens, the problem is prevented from the light is directly, and the external side, the effect is prevented from being influenced by the projection light is directly, and the side is the side the light is reflected by the side, and the light is the side. Because the prismatic raised strips 28 cannot absorb all the reflected light, a small part of the light is always reflected back, so the prismatic raised strips 28 far away from the lens have the highest height, so that the reflected light can be reflected to a distance far away from the lens to the greatest extent, the light is refracted at the part with the prismatic raised strips 28 as much as possible, and a better light absorption effect is realized.
Preferably, a sliding groove 41 is provided in the mounting housing 26, the functional slide tube 36 is slidably disposed in the sliding groove 41, and the pushing slide sheet 37 is mounted on the outer side of the functional slide tube 36.
The slide 37 is pushed by manual sliding to realize the position adjustment function of the functional slide cylinder 36 relative to the outer mirror surface of the projection lens 24.
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 securing ring 32 achieves a stable installation of the projection lens 24.
Preferably, a black cotton pad 39 is mounted on the inner wall of the concave arc groove 38.
The problem that the projection effect is affected by reflection generated by the fact that external light irradiates the inner wall of the inner concave arc groove 38 is solved through the black cotton pad 39.
Preferably, the adjacent prismatic raised strips 28 are provided with spaces 30 therebetween, the spaces 30 decreasing in width from bottom to top.
By gradually narrowing the space 30 between adjacent prismatic raised bars 28 from bottom to top, the higher the absorption frequency of stray light by the projection lens 24 is achieved, thereby further improving the stray light processing effect.
Preferably, the density of light absorbing holes 29 distributed on the surface of the bottom-up prismatic ribs 28 increases gradually.
The absorption efficiency of the stray light inside the projection lens 24 is improved by gradually increasing the distribution density of the light absorption holes 29 near the lens end inside the projection lens 24 and reducing the matching interval.
Preferably, the light absorbing holes 29 are in the shape of an outward expansion and inward contraction.
The light is convenient to enter through the outward expansion and inward contraction shape, so that the problem that the light escapes through reflection is reduced.
Preferably, the upper inner walls of the light absorbing holes 29 and the inner folded portions 33 are smooth walls with light reflecting effect.
The effect that the light can not overflow is achieved by matching the upper side light sliding reflecting wall surface with the shape of the light absorption hole 29 and the inward folded part 33.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a projection screen is with preventing reflection of light device, includes carries on casing, its characterized in that: the projection lens is installed in the carrying shell, an inclined installation part is arranged in the carrying shell, a liquid crystal screen is installed on the inclined installation part, an inclined wall part is arranged between the liquid crystal screen and the projection lens, a prismatic protruding strip with the protruding height gradually reduced from bottom to top is arranged on an inner wall array of the inclined wall part, the section of the prismatic protruding strip is of a forward-inclined triangle structure, a light absorption hole is arranged on the prismatic protruding strip array, an inward-folded part is arranged in the light absorption hole, a porous light absorption pad is arranged at the bottom of the inward-folded part, a functional sliding cylinder capable of being adjusted in a sliding mode is installed on the carrying shell, and the functional sliding cylinder is provided with an inward-concave arc groove; and a space is arranged between adjacent prismatic protruding strips, and the width of the space is gradually reduced from bottom to top.
2. The antireflection device for a projection screen according to claim 1, wherein: the carrying shell is internally provided with a sliding groove, the functional sliding cylinder is arranged in the sliding groove in a sliding way, and the outer side of the functional sliding cylinder is provided with a pushing sliding sheet.
3. The antireflection device for a projection screen according to claim 1, wherein: the carrying shell is internally provided with a fixed ring, and the fixed ring is connected with the outer wall of the projection lens.
4. The antireflection device for a projection screen according to claim 1, wherein: and a black cotton pad is arranged on the inner wall of the inner concave arc groove.
5. The antireflection device for a projection screen according to claim 1, wherein: the density of the light absorption holes distributed on the surface of the prismatic protruding strip from bottom to top is gradually increased.
6. The antireflection device for a projection screen according to claim 1, wherein: the light absorption hole patterns are in an outward expansion and inward contraction shape.
7. The antireflection device for a projection screen according to claim 1, wherein: the light absorption holes and the inner wall of the upper side of the inward folded part are smooth wall surfaces with light reflection effect.
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 CN114488665A (en) | 2022-05-13 |
| CN114488665B true 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114488665A (en) | 2022-05-13 |
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