CN217846881U - Front projection screen with multilayer lens structure - Google Patents
Front projection screen with multilayer lens structure Download PDFInfo
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- CN217846881U CN217846881U CN202221988487.5U CN202221988487U CN217846881U CN 217846881 U CN217846881 U CN 217846881U CN 202221988487 U CN202221988487 U CN 202221988487U CN 217846881 U CN217846881 U CN 217846881U
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Abstract
A positive projection screen with a multilayer lens structure sequentially comprises a first lens layer, a second lens layer and a reflecting layer. Wherein, first semicylindrical lens in the first lens layer do benefit to refract light towards the upper and lower both sides of projection screen and change light transmission angle, and second semicylindrical lens in the second lens layer do benefit to refract light towards the left and right sides of projection screen and change light transmission angle to make light not concentrated at the middle part region and make light distribution more even, thereby can improve the luminance homogeneity of projection screen. In addition, the first lens layer and the second lens layer are equivalent to 4 layers of lenses after being compounded, the refractive indexes of the lenses of all layers are different, so that refraction is facilitated to occur at the joint surface of the lenses to improve the scattering capacity, the light intensity in the main force scattering direction is weakened for many times, the light intensities in other directions are accumulated layer by layer, the light intensity close to the main force scattering direction can be finally achieved, and the brightness uniformity can be improved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a projection screen, in particular to curtain is just throwing of multilayer lens structure.
[ background of the invention ]
Projection screens are generally classified into front projection screens and rear projection screens. Among them, the front projection screen generally relies on the reflection principle, and the rear projection screen relies on the transmission principle. The existing front projection type projection screen is mainly used for directly processing an imaging layer on the surface of a base material to be used for projecting light reflection, and due to the structure, the light reflection is large, the mirror reflection is easy to form, the screen brightness is low, the visual angle is small, the problem of uneven viewing brightness is easy to occur, namely, the problem that people see which area of a picture is bright at which position of the screen is easy to occur.
[ Utility model ] A method for manufacturing a semiconductor device
The utility model aims at solving the problems and improving a more even multilayer lens structure of luminance and just throwing the curtain.
In order to solve the above problem, the utility model provides a multilayer lens structure throws curtain, its characterized in that, it includes in proper order:
the first lens layer is provided with a plurality of first semi-cylindrical lenses arrayed along the transverse direction and first lens parts filled between the cylindrical surfaces of the first semi-cylindrical lenses;
the second lens layer is provided with a plurality of second semi-cylindrical lenses arrayed vertically and second lens parts filled between the cylindrical surfaces of the second semi-cylindrical lenses;
and the reflecting layer is used for reflecting and imaging.
Further, the refractive index of the first semicylindrical lens is different from the refractive index of the first lens portion.
Further, the refractive index of the second semi-cylindrical lens is different from the refractive index of the second lens portion.
Further, the first semi-cylindrical lenses are spaced from each other, and the cylindrical surfaces of the first semi-cylindrical lenses protrude towards the side far away from the reflecting layer.
Furthermore, the second semi-cylindrical lenses are spaced from each other, and the cylindrical surfaces of the second semi-cylindrical lenses protrude towards one side far away from the reflecting layer.
Further, the second lens portions are distributed between the first semi-cylindrical lens and the second semi-cylindrical lens along the thickness direction of the projection screen.
Further, the refractive index of the second lens portion is different from the refractive index of the first and second semicylindrical lenses.
Furthermore, a substrate protection layer is arranged on one side of the reflection layer far away from the second lens layer, and the substrate protection layer is black.
Further, the size of the first semi-cylindrical lens is consistent with the size of the second semi-cylindrical lens.
The beneficial contributions of the utility model reside in that, it has effectively solved above-mentioned problem. The utility model discloses a multilayer lens structure is equipped with first lens layer and second lens layer, wherein, first semi-cylindrical lens in the first lens layer does benefit to and refracts light towards the upper and lower both sides of projection screen and changes light transmission angle, second semi-cylindrical lens in the second lens layer does benefit to and refracts light towards the left and right sides of projection screen and changes light transmission angle, thereby make light not concentrated at the middle part region and make light distribution more even, thereby can improve the luminance homogeneity of projection screen. In addition, the first lens layer and the second lens layer are equivalent to 4 layers of lenses after being compounded, the refractive indexes of the lenses of all layers are different, so that refraction is facilitated to occur at the joint surface of the lenses to improve the scattering capacity, the light intensity in the main force scattering direction is weakened for many times, the light intensities in other directions are accumulated layer by layer, the light intensity close to the main force scattering direction can be finally achieved, and the brightness uniformity can be improved. The utility model discloses a multilayer lens structure's curtain of just throwing has simple structure, luminance characteristics even, that the display effect is good, and it has very strong practicality.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
The attached drawings are as follows: the lens structure includes a first lens layer 10, a first semi-cylindrical lens 11, a first lens portion 12, a second lens layer 20, a second semi-cylindrical lens 21, a second lens portion 22, a reflective layer 30, and a base protective layer 40.
[ detailed description ] embodiments
The following examples are further to explain and supplement the present invention, and do not constitute any limitation to the present invention.
As shown in fig. 1 and 2, the front projection screen of the multi-layered lens structure of the present invention includes a first lens layer 10, a second lens layer 20, and a reflective layer 30. Further, it also includes a base protective layer 40.
The first lens layer 10 and the second lens layer 20 serve to make the screen brightness more uniform.
The first lens layer 10 includes a plurality of first semi-cylindrical lenses 11 and first lens portions 12 arranged in a lateral array.
The first semicylindrical lens 11 is used for refracting light of the projection screen towards the upper side and the lower side of the projection screen so as to change the distribution of the light. The first semi-cylindrical lens 11 extends from one end of the projection screen to the other end in the lateral direction. The plane of the first semi-cylindrical lens 11 faces the second lens layer 20. The cylindrical surface of the first semicylindrical lens 11 protrudes toward the side away from the reflective layer 30. In this embodiment, two adjacent first semicylindrical lenses 11 are spaced from each other, and the spacing distance can be set according to needs.
The first lens portion 12 is filled between the cylindrical surfaces of the first semi-cylindrical lens 11, so that both side surfaces of the first lens layer 10 are flat. The refractive index of the first lens portion 12 is different from that of the first semicylindrical lens 11, which facilitates the refraction of light rays at the joint surface thereof to change the original transmission angle. Preferably, the refractive index of the first lens portion 12 is different from the refractive index of the first semi-cylindrical lens 11 as much as possible, so that the scattering power of light passing through each lens layer can be improved.
The second lens layer 20 includes a plurality of second semi-cylindrical lenses 21 and second lens portions 22 arranged in a vertical array.
The second semi-cylindrical lens 21 is used for refracting light of the projection screen towards the left side and the right side of the projection screen so as to change the distribution of the light. The second semi-cylindrical lens 21 extends vertically from one end of the projection screen to the other end. The plane of the second semi-cylindrical lens 21 faces the reflective layer 30. The cylindrical surface of the second semi-cylindrical lens 21 protrudes toward the side away from the reflective layer 30. In this embodiment, two adjacent second semicylindrical lenses 21 are spaced from each other, and the spacing distance can be set as required. In this embodiment, the size of the second semi-cylindrical lens 21 is the same as the size of the first semi-cylindrical lens 11, so that the first semi-cylindrical lens 11 and the second semi-cylindrical lens 21 can be processed simultaneously by using the same mold, thereby simplifying the processing steps.
The second lens portion 22 is filled between the cylindrical surfaces of the second semi-cylindrical lens 21, so that both side surfaces of the second lens layer 20 are flat. The second lens portion 22 is located between the first semi-cylindrical lens 11 and the second semi-cylindrical lens 21 as viewed in the thickness direction of the projection screen. The refractive index of the second lens part 22 is different from the refractive index of the second semi-cylindrical lens 21 and the refractive index of the first semi-cylindrical lens 11, so that the light rays can be favorably refracted at the joint surface of the second semi-cylindrical lens and the first semi-cylindrical lens to change the original transmission angle. Preferably, the refractive index difference between the second lens portion 22 and the second and first semi-cylindrical lenses 21 and 11 is preferably larger, so that the scattering power of light passing through each lens layer can be improved.
The reflective layer 30 is used for reflective imaging of the projected light, and may be selected from known reflective imaging layers, such as a pearlescent paint layer structure.
The base protective layer 40 is provided on the back surface of the reflective layer 30, i.e., on the surface of the side away from the second lens layer 20. The substrate protective layer 40 serves to protect the reflective layer 30 from damage. The substrate protection layer 40 may be a black structure layer, and may also absorb ambient light on the back side of the projection screen to prevent the ambient light on the back side from interfering with the projection screen, so as to improve the contrast of the image on the projection screen and improve the display effect.
The base protective layer 40 may be a hard structural layer or a soft structural layer. When the base protective layer 40 is provided as a hard structural layer, the projection screen manufactured thereby cannot be rolled. When the base protective layer 40 is a soft structure layer, the projection screen manufactured by the method can be rolled and placed. In this embodiment, the substrate protection layer 40 is preferably a soft structural layer, which may be a black paint layer.
From this, the front projection screen of the multi-layered lens structure of the present invention is formed, which includes the first lens layer 10, the second lens layer 20, the reflective layer 30 and the base protective layer 40 in this order. Wherein the first lens layer 10 is the side facing the viewer, i.e. the front side. The base protective layer 40 is the backside. When the projection device is used, the projection device is placed on the front side of a projection screen, projection light emitted by the projection device sequentially passes through the first lens part 12, the first semi-cylindrical lens 11, the second lens part 22 and the second semi-cylindrical lens 21 to reach the reflecting layer 30, and after being reflected by the reflecting layer 30, the projection light sequentially passes through the second semi-cylindrical lens 21, the second lens part 22, the first semi-cylindrical lens 11 and the first lens part 12 and is emitted towards the front, so that the projection light enters the visual field of audiences.
When the projection light passes through the first lens layer 10 and the second lens layer 20, refraction occurs at the junction surfaces of the lenses. Light all can produce the refraction when getting into low refracting index material and penetrating into high refracting index material from low refracting index material from high refracting index material, every layer lens all can produce stronger scattering power like this, and the refractive index difference of the material of refracting surface both sides is big more, and the scattering power of lens is stronger. And the first lens layer 10 and the second lens layer 20 essentially correspond to a 4-layer lens structure. When light penetrates through the 4 layers of lenses, the light intensity in the main force scattering direction is weakened for multiple times, and the light intensities in other directions are accumulated layer by layer, so that the light intensity close to the main force scattering direction can be finally achieved, and better visual angle uniformity can be obtained. In addition, first semicylindrical lens 11 and second semicylindrical lens 21 are when refracting, and first semicylindrical lens 11 refracts light to both sides direction about the projection screen, and second semicylindrical lens 21 refracts light to the projection screen left and right sides direction, also can make light not concentrated in the middle part region like this and by evenly distributed to make the luminance of projection screen everywhere unanimous basically, obtain better visual angle degree of consistency. Therefore, through setting up the lens that the multilayer refracting index is different, alright improve the scattering of light, can reduce the correlation between the light and reduce speckle effect on the one hand, on the other hand can make light distribution more even to make picture luminance, visual angle more even, thereby improve projection screen's display effect.
While the invention has been described with reference to the above embodiments, the scope of the invention is not limited thereto, and the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the concept of the invention.
Claims (9)
1. A positive projection screen of a multilayer lens structure, comprising in order:
the first lens layer (10) is provided with a plurality of first semi-cylindrical lenses (11) arrayed along the transverse direction and first lens parts (12) filled between the cylindrical surfaces of the first semi-cylindrical lenses (11);
the second lens layer (20) is provided with a plurality of second semi-cylindrical lenses (21) which are arrayed vertically and second lens parts (22) which are filled between the cylindrical surfaces of the second semi-cylindrical lenses (21);
a reflective layer (30) for reflective imaging.
2. The front projection screen of a multilayer lens structure of claim 1,
the refractive index of the first semicylindrical lens (11) is different from the refractive index of the first lens section (12).
3. The front projection screen of a multilayer lens structure of claim 2, wherein the refractive index of the second semi-cylindrical lens (21) is different from the refractive index of the second lens portion (22).
4. A front projection screen of a multilayer lens structure as claimed in claim 3, characterized in that the first semi-cylindrical lenses (11) are spaced apart from each other, and the cylindrical surfaces of the first semi-cylindrical lenses (11) are convex toward the side away from the reflective layer (30).
5. The front projection screen of a multi-layered lens structure as claimed in claim 4, wherein the second semi-cylindrical lenses (21) are spaced apart from each other, and the cylindrical surfaces of the second semi-cylindrical lenses (21) are protruded toward a side away from the reflective layer (30).
6. The front projection screen with a multi-layered lens structure as claimed in claim 5, wherein the second lens portions (22) are distributed between the first semi-cylindrical lens (11) and the second semi-cylindrical lens (21) in the thickness direction of the projection screen.
7. The front projection screen with a multilayer lens structure of claim 6, wherein the refractive index of the second lens portion (22) is different from the refractive indices of the first and second semicylindrical lenses (11, 21).
8. The front projection screen of a multilayer lens structure as claimed in claim 1, characterized in that a base protective layer (40) is provided on the side of the reflective layer (30) remote from the second lens layer (20), the base protective layer (40) being black.
9. The front projection screen of a multilayer lens structure as claimed in claim 1, characterized in that the first semi-cylindrical lens (11) has dimensions corresponding to those of the second semi-cylindrical lens (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221988487.5U CN217846881U (en) | 2022-07-30 | 2022-07-30 | Front projection screen with multilayer lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221988487.5U CN217846881U (en) | 2022-07-30 | 2022-07-30 | Front projection screen with multilayer lens structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217846881U true CN217846881U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221988487.5U Active CN217846881U (en) | 2022-07-30 | 2022-07-30 | Front projection screen with multilayer lens structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217846881U (en) |
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2022
- 2022-07-30 CN CN202221988487.5U patent/CN217846881U/en active Active
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