TWM568984U - High contrast projection screen - Google Patents

Abstract

A high contrast projection screen comprising: a base layer and a plurality of micro-inch absorption structures. The micro-absorption structures are formed on the substrate layer. Each micro-absorption structure comprises an incident surface, an active surface and a bottom surface, and the incident surface, the active surface and the bottom surface form a triangular structure. Wherein the plurality of light absorbing particles are dispersed in the microscopic absorption structures. When light from the environment illuminates the high contrast projection screen, light enters the micro-absorption structure and is absorbed by the light-absorbing particles, thereby improving image contrast and brightness. The base layer can be a transparent or black structural layer, which can further absorb the ambient light entering the microscopic absorption structure, and can further increase the contrast effect of the image and the brightness of the display.

Description

High-contrast projection screen

A projection screen, especially a projection screen capable of providing a high-contrast image.

Please refer to FIG. 6, which is a schematic diagram of an application of a conventional projection screen. When the projection screen 90 and a short-focus projector 93 are used in an environment where an ambient light source 91 (eg, electric light, sun) exists, the short-focus projector 93 projects an image onto the projection screen 90, and the ambient light source 91 For example, indoor lighting fixtures will generate ambient light into the environment, and the projection screen 90 will also be illuminated by the ambient light, causing the image of the projection screen 90 to be blurred, and the color and brightness contrast will not be clear. The curtains must be pulled. The image can be clearly seen by turning on or off the indoor lamps or increasing the projection brightness of the short-focus projector 93. In other words, the viewer must reduce the ambient light to see a clear image on the projection screen 90, causing inconvenience in use.

In addition, please refer to FIG. 7, when the existing projection screen 90 is used with a short-focus projector or an ultra-short-focus projector 93, since the distances between the projectors 93 and the projection screen 90 are very close, the projection light is projected to the When the projection screen 90 is projected, light will be reflected by the projection screen 90 to a partial area 94 of the ceiling. Within this area 94, a ghost image is generated that is the same as the image light. It is easy for the viewer to cause visual interference and reduce the image quality. Sharpness and contrast, causing problems such as blurred images.

In order to solve the problem that the conventional projection screen must be used in dim places, and the ghosting occurs on the ceiling, this creative department proposes a high-contrast projection screen. The high-contrast projection screen can still display clear and contrast in the environment with ambient light. High images will not cause insufficient brightness visually due to the influence of ambient light. At the same time, the micro-structure design of the micro-absorptive structure can effectively eliminate ghost images on the ceiling and increase the quality.

In order to achieve the above purpose, this creative high-contrast projection screen includes: a base layer, which includes a first side and a second side, the first side being opposite to the second side; and a plurality of micro-absorptive absorption structures formed in the On the first side of the base layer, one of the micro-chirped structures is connected to form a continuous arrangement of the micro-chirped absorption structures, wherein a plurality of light absorptions are distributed in the micro-chirped absorption structures. Particles, the light-absorbing particles are dispersed in the micro-absorptive structures to absorb ambient light from the operating environment of the projection screen.

A high-contrast projection screen includes: a base layer including a first side and a second side, the first side being opposite to the second side; and a plurality of micro-absorptive absorption structures formed on the first layer of the base layer. On one side, a gap is maintained between adjacent micro-chirped absorption structures to expose the base layer, and the base layer exposed in the gap serves as a light-absorbing region; wherein a plurality of micro-chirped absorption structures are distributed in the micro-chirped absorption structures. Light-absorbing particles, which are dispersed in the micro-absorptive structures to absorb ambient light from the operating environment of the projection screen.

These micro-chirped absorption structures have an incident surface and a reflective layer, which can not only absorb the ambient light and reduce the impact of the ambient light on the viewer. The reflective layer can also project the image of the projection device to the viewer's eyes. The viewer can see a clearer image. The use of these light-absorbing particles can effectively absorb the ambient light and reduce the reflection of the ambient light to the viewer's eyes through the projection screen. Eyes, so that most of the light received by the viewer's eyes is the light of the image, thereby improving the sharpness and contrast of the image and achieving a high contrast effect.

In addition, the base layer can further be a black base layer. When the ambient light passes through the micro-absorptive structure, when entering the black base layer, the black base layer can more effectively absorb the ambient light, and can also improve the image quality. Degree of contrast.

By using the inclination angle of the active surface and the horizontal line in the micro-absorptive structures, most of the images projected by the projection device can be reflected into the eyes of the viewer, which can effectively avoid ghost images on the ceiling and reduce ghost images. The degree of interference for the viewer.

10‧‧‧ basal layer

11‧‧‧ the first side

12‧‧‧ second side

20‧‧‧ micro-absorptive structure

21‧‧‧ incidence plane

23‧‧‧active surface

25‧‧‧ underside

27‧‧‧Reflective layer

29‧‧‧ light absorbing particles

40‧‧‧ Projection device

60‧‧‧Ambient light source

80‧‧‧ eyes

90‧‧‧ projection screen

91‧‧‧Ambient light source

92‧‧‧ eyes

93‧‧‧Short Focus Projector

94‧‧‧area

L1‧‧‧first length

L2‧‧‧Second Length

θ1‧‧‧First tilt angle

θ2‧‧‧Second tilt angle

Figure 1: Schematic diagram of the first embodiment of this creative high-contrast projection screen.

Figure 2: Schematic diagram of the micro-absorption structure of this creation.

Fig. 3: Schematic diagram of the second embodiment of this creation.

FIG. 4 is a schematic diagram of a third embodiment of this creation.

FIG. 5 is a schematic diagram of a fourth embodiment of this creation.

Figure 6: Schematic diagram of the conventional projection screen used in applications with ambient light.

Figure 7: Schematic diagram of the application of a conventional projection screen with a short-focus projector.

Please refer to FIG. 1, this creation is a high-contrast projection screen including: a base layer 10 and a plurality of micro-absorptive structures 20. The base layer 10 has a first surface 11 and a second surface 12. The first surface 11 is opposite to the second surface 12. In the first embodiment of the present invention, the base layer 10 is a transparent base layer; The micro-absorptive structures 20 are disposed on the first surface 11 of the base layer 10. As shown in FIG. 1, the micro-absorptive structures 20 are sequentially arranged from top to bottom.

Referring to FIG. 2, the cross-section of each micro-absorptive structure 20 is a triangular structure. Viewed from the cross-section, it includes an incident surface 21, an active surface 23, and a bottom surface 25. The bottom surface 25 is disposed on the base layer. A first inclination angle θ1 formed between the incident surface 21 and the horizontal line H on the first surface 11 of 10 is such that the slope of the incident surface 21 is in the form of a negative slope, and between the active surface 23 and the horizontal line H A second inclination angle θ2 is formed, so that the slope of the action surface 23 is in the form of a positive slope, and is inclined in the opposite direction to the incident surface 21, and the angle between the incident surface 21 and the action surface 23 Add the angle sum of the second tilt angle θ2 to the first tilt angle θ1 (θ1 + θ2). In this embodiment, the bottom surfaces 25 of two adjacent micro-chirped absorption structures 20 are connected, and the active surface 23 of the previous micro-chirped absorption structure 20 is connected to the incident surface 21 of the next micro-chirped absorption structure 20, Form a continuous arrangement. The active surface 23 has a first length L1, and a reflective layer 27 is further formed on the active surface 23. Furthermore, the micro-absorptive structures 20 are made of a material mixed with light-absorbing particles 29, so light-absorptive particles 29 are distributed inside each micro-absorptive structure 20.

The reflective layer 27 is partially formed on the active surface 23, and the reflective layer 27 further has a second length L2. In a preferred embodiment, the reflective layer 27 is formed relatively above the active surface 23. Position, and the ratio of the second length L2 to the first length L1 is 57% to 66%. In addition, the reflective layer 27 is disposed on the active surface 23. The reflective layer 27 may be a white ink paint layer, a pearl ink paint layer, a silver ink paint layer, or a paint layer with high reflectivity.

The light-absorbing particles 29 are distributed in the micro-absorptive structures 20. In a preferred embodiment, the total volume of the light-absorptive particles 29 accounts for 0.5% of the volume of the micro-absorptive structures ~ 3%, and the diameter of the light absorbing particles 29 is between about 1 micrometer and 30 micrometers. The light absorbing particles 29 may be black particles. Furthermore, the light absorbing particles 29 can be composed of elemental carbon (C) particles. Since the carbon particles are black, the ability to absorb ambient light can be improved to reduce the ambient light entering the viewer after being reflected by the high-contrast projection screen. Eye proportion.

Please refer to FIG. 1. Generally speaking, the high-contrast projection screen is set up in a projection environment. The projection environment includes at least one projection device 40 and at least one ambient light source 60. The projection device 40 may be a short-focus projector. The ambient light source 60 may be an indoor lighting fixture or sunlight from outside. As shown in FIG. 1, when the projection device 40 generates a projection light beam to the high-contrast projection screen, the projection light beam is first projected onto the reflection layer 27, and then reflected by the reflection layer 27 and enters the viewer's eye 40. When the ambient light source 60 also generates an ambient light beam to the high-contrast projection screen, the ambient light beam enters the micro-absorptive structures 20 through the incident surfaces 21 and is absorbed by the light-absorbing particles 29 or The reflective layers 27 enter the micro-absorptive absorption structures 20 through the incident surface 21 after being reflected, and can also be absorbed by the light-absorbing particles 29. Since the light absorbing particles 29 can effectively absorb the ambient light beam, the influence of the ambient light beams on the viewer's eyes 80 can be reduced, and the contrast degree and sharpness of the projection light beam can be relatively improved.

In addition, by adjusting the second tilt angle θ2 formed between the action surface 23 and the horizontal line H, the light output angle of the projection beam can be kept within the range of the viewer's line of sight, and the projection beam can be prevented from reflecting to the ceiling, reducing The chance of ghosting in the ceiling.

Please refer to FIG. 3, which is a second embodiment of the present invention. The difference from the first embodiment is that the base layer 10 is a black base layer.

Since the color of the base layer 10 is black, compared with the transparent base layer 10 of the first embodiment, the effect of the base layer 10 in absorbing ambient light beams is more significant, so that the ambient light beams can be effectively absorbed by the light absorbing particles 29. Blocking absorption with the black base layer can further improve the contrast and brightness of the projected beam.

Please refer to FIG. 4, which is the third embodiment of the present invention. The difference from the first embodiment is that the micro-chirped absorption structures 20 have a plurality of light-absorbing regions 14.

In this embodiment, a gap is maintained between the adjacent micro-chirped absorption structures 20 to expose the base layer 10, and the gap constitutes the light-absorbing region 14, specifically, a micro-chirped absorption structure. 20, a light-absorbing area 14, a micro-absorptive structure 20, a light-absorbing area 14 ... Alternately arranged sequentially, it can also be arranged in a concentric circle or in a scattered distribution form, the arrangement form can be based on the scene environment Need to be set to achieve the high contrast and vivid color of the projected image.

Please refer to FIG. 5, which is the fourth embodiment of the present invention. The difference from the third embodiment is that the base layer 10 is a black base layer.

In this embodiment, the light absorption regions 14 are also located between the micro-chirped absorption structures 20. When the ambient light beams reach the high-contrast projection screen, the light absorption regions 14 can absorb the ambient light beams from the ambient light source 60, and the base layer 10 is a black base layer. When the ambient light sources directly enter The base layer 10 can be effectively absorbed by the base layer 10 to reduce the light beam reflected back to the environment, and can also increase the clarity of the image.

This creation adds light absorbing particles that can absorb light on the original projection screen, so that the light from the ambient light source can be effectively absorbed by the light absorbing particles, reducing the amount of ambient light entering the viewer's eyes, thereby increasing the degree of contrast and providing high Contrast and high definition images. In addition, the micro-absorptive structure with light-absorbing particles is applied to different substrate layers, which can effectively absorb ambient light and reduce the interference of ambient light. Furthermore, a light-absorbing region is formed between the micro-absorptive absorption structures, which can also absorb the amount of ambient light sources and improve the degree of contrast. At the same time, the high-contrast projection screen does not need to turn off the lights or pull up the curtains when it is used indoors. It can provide high-contrast, clear and bright images in general light environments, even in bright environments. There is also no need to use high-intensity projection equipment deliberately. With this creation, a clear projection image can be displayed, so that the high-contrast projection screen can be flexibly used in various occasions. In addition, due to the use of the high-contrast projection screen, there is no need to specifically search for or create occasions with extremely weak ambient light, and it can also prevent the eyes from seeing objects under low light conditions, reducing the risk of vision problems.

Claims (16)

A high-contrast projection screen includes: a base layer including a first side and a second side, the first side being opposite to the second side; and a plurality of micro-absorptive absorption structures formed on the first layer of the base layer. On one side, a bottom surface of each micro-chirped structure is connected to form a structure in which the micro-chirped absorption structures are continuously arranged. Among them, a plurality of light-absorbing particles are distributed in the micro-chirped absorption structures. Absorbing particles are scattered in the micro-absorptive structures to absorb ambient light from the operating environment of the projection screen. According to the high-contrast projection screen described in claim 1, the light-absorbing particles are black particles. According to the high-contrast projection screen described in claim 2, the light-absorbing particles are carbon particles, and each light-absorbing particle has a diameter of about 1 micrometer to 30 micrometers, and the light-absorbing particles occupy the micro-absorptive structure. 0.5 ~ 3% of the total volume. The high-contrast projection screen described in claim 3, wherein the cross-section of each micro-chirped absorption structure is a triangular structure, including an incident surface, an active surface, and the bottom surface, wherein a first surface is formed between the incident surface and the horizontal line. An inclination angle, the inclination of the incident surface is a negative slope, and a second inclination angle is formed between the active surface and the horizontal line, the inclination of the active surface is a positive slope. According to the high-contrast projection screen described in claim 4, the active mask has a first length, and the bottom surface is disposed on the first surface of the base layer. According to the high-contrast projection screen described in claim 5, each micro-absorptive structure has a reflective layer, the reflective layer is disposed at a position relatively above the active surface, the reflective layer has a second length, and the second The ratio of the length to the first length is about 57% to 66%. The high-contrast projection screen described in claim 6, wherein the base layer is a black base layer. The high-contrast projection screen described in claim 6, wherein the base layer is a transparent base layer. A high-contrast projection screen includes: a base layer including a first side and a second side, the first side being opposite to the second side; and a plurality of micro-absorptive absorption structures formed on the first layer of the base layer. On one side, a gap is maintained between adjacent micro-chirped absorption structures to expose the base layer, and the base layer exposed in the gap serves as a light-absorbing region; wherein a plurality of micro-chirped absorption structures are distributed in the micro-chirped absorption structures. Light-absorbing particles, which are dispersed in the micro-absorptive structures to absorb ambient light from the operating environment of the projection screen. According to the high-contrast projection screen described in claim 9, the light-absorbing particles are black particles. According to the high-contrast projection screen described in claim 10, the light-absorbing particles are carbon particles, and each light-absorbing particle has a diameter of about 1 micrometer to 30 micrometers, and the light-absorbing particles occupy the micro-absorptive structure. 0.5 ~ 3% of the total volume. The high-contrast projection screen described in claim 11, wherein the cross-section of each micro-absorptive structure is a triangular structure, including an incident surface, an active surface, and a bottom surface, wherein a first surface is formed between the incident surface and the horizontal line. An inclination angle, the inclination of the incident surface is a negative slope, and a second inclination angle is formed between the active surface and the horizontal line, the inclination of the active surface is a positive slope. According to the high-contrast projection screen described in claim 12, the active mask has a first length, and the bottom surface is disposed on the first surface of the base layer. According to the high-contrast projection screen described in claim 13, each micro-absorptive structure has a reflective layer, the reflective layer is disposed at a position relatively above the active surface, the reflective layer has a second length, and the second The ratio of the length to the first length is about 57% to 66%. The high-contrast projection screen according to claim 14, wherein the base layer is a black base layer. The high-contrast projection screen according to claim 14, wherein the base layer is a transparent base layer.