TWM587765U - Reflective projection screen - Google Patents

Abstract

This creation is a reflective projection screen, which includes: a plurality of optical structures arranged continuously, each optical structure including a reflecting surface and an absorbing surface, the reflecting surface is arranged obliquely relative to the horizontal plane, and the absorbing surface is arranged obliquely relative to the horizontal plane and opposite to the reflecting surface oblique It is also provided with a first reflective layer, a light absorbing layer and a second reflective layer. The first reflective layer is provided on the reflective surface and can diffuse the light uniformly to have a good viewing angle when reflecting the light. The second reflective layer is located on the reflective surface between the first reflective layer and the light absorbing layer. The reflectivity of the second reflective layer is higher than that of the first reflective layer. In order to improve the brightness and sharpness of the existing projection screen, this creation adds The second reflective layer provides a reflective projection screen with better brightness, contrast, and sharpness of image light.

Description

Reflective projection screen

This creation relates to a projection screen, in particular to a reflective projection screen that can increase the brightness of the reflected light from a projection device.

In order to obtain a clear projection image, conventional projection screens usually need to shield ambient light sources (such as the sun and electric lights) during use, which is inconvenient in use and the quality of the images viewed is not clear enough.

A high-luminance projection screen proposed by China's patent No. M374077 includes a plurality of optical structures that can be arranged on a base layer, and the plurality of optical structures are continuously arranged triangles. The active surface of each optical structure is provided with a reflective layer to absorb the light. A light absorption layer is provided on the surface. The reflection layer can diffusely reflect the light emitted by the projection equipment to form an image and project it to the line of sight of the human eye. The light absorption layer can absorb the light source from the environment and reduce the ambient light source to the projection screen image. The impact caused by the contrast, when in use, there is no need to specifically shield the sun or worry that the projection screen will be affected by the ambient light source, so that users can enjoy a clear image on the projection screen without turning off the lighting equipment or blocking the ambient light source.

However, the existing high-definition projection screens still have room for further improvement in brightness and sharpness.

In order to improve the brightness and sharpness of existing projection screens, a second reflective layer was added to the reflective surface of this creation to provide a reflective projection screen with better image brightness, light and dark contrast, and better image clarity.

In order to achieve the structural characteristics and technical contents of the above purpose, this creation proposes a reflective projection screen, which includes: a plurality of optical structures arranged continuously, each optical structure including a reflecting surface and an absorbing surface, the reflecting surface is inclined relative to a horizontal plane Is provided, the absorbing surface is arranged obliquely with respect to the horizontal plane and is opposite to the inclined direction of the reflecting surface, and is provided with a first reflecting layer which is arranged on the reflecting surface and can evenly diffuse light when reflecting the light, and is absorbing with the absorption A distance from the surface; a light absorption layer covering the absorption surface and extending to the reflection surface; and a second reflection layer provided on the reflection surface and located between the first reflection layer and the light absorption layer Meanwhile, the reflectivity of the second reflective layer is higher than that of the first reflective layer.

In the reflective projection screen, the light absorbing layer extends to the reflective surface and is far from the first reflective layer.

In the reflective projection screen, the second reflective layer is connected to the first reflective layer and the absorption layer.

In the reflective projection screen, the light absorption layer partially covers the second reflection layer.

In the reflective projection screen, an area where the second reflective layer can reflect light is smaller than an area where the first reflective layer can reflect light.

In the reflective projection screen, a length of the first reflective layer in a cross section is greater than a length of the second reflective layer in a cross section.

In the reflective projection screen, a length of the first reflective layer in a cross section is 3 to 4 times a length of the second reflective layer in a cross section.

The reflective projection screen includes a base layer, and the plurality of optical structures are disposed on the base layer.

In the reflective projection screen, the plurality of optical structures and the base layer are integrated into a single member, and the plurality of optical structures are formed on one side of the base layer.

In the reflective projection screen, the second reflective layer extends to the absorption surface and is covered by the light absorption layer.

In the reflective projection screen, the light absorbing layer extends to the reflective surface and is far from the first reflective layer.

In the reflective projection screen, the second reflective layer is connected to the first reflective layer.

In the reflective projection screen, an area where the second reflective layer can reflect light is smaller than an area where the first reflective layer can reflect light.

In the reflective projection screen, a length of the first reflective layer in a cross section is greater than a length of the second reflective layer in a cross section.

In the reflective projection screen, a length of the first reflective layer in a cross section is 3 to 4 times a length of the second reflective layer in a cross section.

The reflective projection screen includes a base layer, and the plurality of optical structures are disposed on the base layer.

In the reflective projection screen, the plurality of optical structures and the base layer are integrated into a single member, and the plurality of optical structures are formed on one side of the base layer.

In the reflective projection screen, the reflectivity of the second reflective layer can be 2 to 8 times the reflectivity of the first reflective layer.

The enhancements brought by the technical means of this creation are:

In this creation, a second reflective layer with a higher reflectivity is added between the first reflective layer and the light absorbing layer. The second reflective layer has a higher reflection amount on the light of the projection device, which can enhance the brightness of the image entering the audience's sight. Because of the increase in brightness, it can further achieve the effect of improving the contrast between light and dark, color saturation and image sharpness.

10‧‧‧ basal layer

20‧‧‧ Optical Structure

21‧‧‧Connecting surface

22‧‧‧Reflective surface

23‧‧‧ Absorbing surface

30‧‧‧first reflective layer

40‧‧‧Second reflective layer

50‧‧‧ light absorbing layer

60‧‧‧ viewers

70‧‧‧ projection device

80‧‧‧Ambient light source

H‧‧‧ horizontal

θ ₁ ‧‧‧Tilt angle

θ ₂ ‧‧‧ tilt angle

FIG. 1 is a schematic diagram of a first preferred embodiment of the creation.

FIG. 2 is a schematic side view of an optical structure according to a first preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of using the first preferred embodiment of the creation.

FIG. 4 is a schematic diagram of a second preferred embodiment of the creation.

FIG. 5 is a schematic diagram of the optical structure of the second preferred embodiment of the creation.

FIG. 6 is a schematic top view of the curved shape of the creation.

In the following, with reference to the drawings and the preferred embodiments of this creation, the technical means adopted by this creation to achieve the intended purpose is further explained.

Please refer to FIG. 1 to FIG. 3. The first preferred embodiment of the present invention includes a base layer 10 and a plurality of optical structures 20. The base layer 10 includes a first surface and a second surface opposite to each other. The base layer 10 can be a transparent base layer or an opaque base layer.

Please refer to FIG. 1 and FIG. 2, the plurality of optical structures 20 are disposed on the first surface of the base layer 10, and the plurality of optical structures 20 are continuously arranged. Each optical structure 20 is a microstructure that is difficult to observe with the naked eye. Therefore, each figure is a schematic side view of the optical structure 20 after being enlarged. The optical structure 20 can be transparent or opaque.

Each optical structure 20 is triangular in cross-section, and includes a connecting surface 21, a reflective surface 22, and an absorbing surface 23, and is provided with a first reflective layer 30, a second reflective layer 40, and a light absorbing layer 50. The connecting surface 21 is connected to the first surface of the base layer 10. An intersection angle is formed between the reflective surface 22 and the absorption surface 23, and the intersection angle is located on the horizontal plane H. The reflecting surface 22 has an inclination angle θ ₁ with respect to a horizontal plane H, and the absorbing surface 23 has an inclination angle θ ₂ with respect to the horizontal plane H. In FIG. 2, the inclination slope of the reflecting surface 22 is a positive slope, and the absorbing surface 23 The inclination slope of is a negative slope, so that the reflecting surface 22 and the absorbing surface 23 are inclined in opposite directions. The intersection angle of the reflection surface 22 of one optical structure 20 and the absorption surface 23 of another optical structure 20 below it is the sum of the tilt angle θ ₁ and the tilt angle θ ₂ . The tilt angle θ ₁ and the tilt angle θ ₂ can be adjusted according to the requirements of a projection device 70 and an ambient light source 80, respectively.

Referring to FIG. 3, the first reflective layer 30 is formed by partially disposing a reflective material on the reflective surface 22, and there is a distance between the first reflective layer 30 and the absorption surface 23. The first reflection layer 30 can reflect the light rays of the image projected by the projection device 70 in a projection environment, and evenly diffuse the light rays to maintain a good viewing angle.

Please refer to FIG. 2, the second reflection layer 40 is formed by arranging a material having a higher reflectance than the first reflection layer 30 on the reflection surface 22 and the absorption surface 23. In a preferred embodiment of the present invention, the The reflectivity of the second reflective layer 40 is 2 to 8 times that of the first reflective layer 30. The portion of the second reflective layer 40 located on the reflective surface 22 is connected to the first reflective layer 30, and the area of the second reflective layer 40 located on the reflective surface 22 is smaller than the area of the first reflective layer 30, and The area where the second reflective layer 40 can reflect the image light of the projection device 70 is smaller than the area of the first reflective layer 30. The portion of the second reflective layer 40 located on the absorbing surface 23 can be partially or entirely disposed on This absorption surface 23. In a cross section of the reflective layer 30 of the optical structure 20, a length 30A of the first reflective layer 30 is three to four times greater than a length 40A of the second reflective layer 40. Referring to FIG. 3, compared to the first reflection layer 30 which diffuses light uniformly during reflection, the second reflection layer 40 can directly reflect the image light projected by the projection device 70 into the line of sight of the audience 60. Increase the brightness of the image.

2 and FIG. 3, the light absorption layer 50 is formed by disposing a light absorption material on the second reflection layer 40. The light absorption layer 50 covers a portion of the second reflection layer 40 on the absorption surface 23 and extends to The reflective surface 22 is far from the first reflective layer 30. The light absorbing layer 50 can absorb the light from the ambient light source 80 on the absorbing surface 23, and can also absorb the ambient light source 80 from the second reflection layer 40 of the optical structure 20 located above and downward toward FIG. 3. Reflected light.

In use, the first reflective layer 30 on the reflective surface 22 can uniformly reflect and diffuse the image light projected by the projection device 70 to have a good viewing angle, which means that the brightness of the image obtained at each viewing angle It is average. The absorbing layer 50 can absorb the light from the ambient light source 80, so that the light from the ambient light source 80 will not affect the clarity of the image projected on the projection screen, and the second reflection on the reflective surface 22 The reflectance of the layer 40 is high, and the image light projected by the projection device 70 has a high reflection amount, which can improve the brightness of the image entering the line of sight of the audience 60. Due to the increased brightness, the brightness of the image can be further improved The effects of contrast, color saturation, and image sharpness.

Taking a dark room test and measurement, and the projection device 70 has an illuminance of 1000 lux as an example, the brightness range of the first reflection layer 30 measured at the viewing angle of the audience 60 is 150-300 nit, and the measured second reflection layer 40 brightness range is 600 ~ 1200nit.

The second preferred embodiment of this creation is shown in FIGS. 4 and 5. The difference from the first preferred embodiment is that the light absorption layer 50 is directly disposed on the absorption surface 23 and extends to the reflection surface. The surface 22 is far from the first reflection layer 30 and covers the intersection angle of the reflection surface 22 and the absorption surface 23, and the second reflection layer 40 is only disposed on the reflection surface 22 and is in contact with the first reflection layer 30 and the light The absorption layers 50 are connected. As long as the second reflection layer 40 is capable of reflecting light between the first reflection layer 30 and the light absorption layer 50, the effects of enhancing brightness, light-dark contrast and image clarity can be achieved.

In other embodiments, the base layer 10 and the plurality of optical structures 20 can be an integrated single component.

In other embodiments, as shown in the top view of the present creation shown in FIG. 6, the projection screen can also be a curved projection screen.

Claims (18)

A reflective projection screen includes: a plurality of optical structures arranged continuously, each optical structure including a reflecting surface and an absorbing surface, the reflecting surface is inclined with respect to a horizontal plane, the absorbing surface is inclined with respect to the horizontal plane and is opposite to the reflecting The surface is inclined in the opposite direction and is provided with: a first reflective layer provided on the reflective surface and capable of diffusing light uniformly when reflecting light, and having a distance from the absorbing surface; a light absorbing layer covering the absorbing surface An extension surface extending to the reflection surface; and a second reflection layer disposed on the reflection surface and located between the first reflection layer and the light absorption layer, the reflectance of the second reflection layer is higher than that of the first reflection layer The reflectivity of a reflective layer. The reflective projection screen of claim 1, wherein the light absorbing layer extends to the reflective surface and away from the first reflective layer. The reflective projection screen according to claim 2, wherein the second reflective layer is connected to the first reflective layer and the absorbing layer. The reflective projection screen according to claim 3, wherein the light-absorbing layer partially covers the second reflective layer. The reflective projection screen according to claim 4, wherein the area where the second reflective layer can reflect light is smaller than the area where the first reflective layer can reflect light. The reflective projection screen according to claim 5, wherein a length of the first reflective layer in a cross section is greater than a length of the second reflective layer in a cross section. The reflective projection screen according to claim 6, wherein a length of the first reflective layer in a cross section is 3 to 4 times a length of the second reflective layer in a cross section. The reflective projection screen according to claim 7, comprising a base layer, and the plurality of optical structures are disposed on the base layer. The reflective projection screen according to claim 8, wherein the plurality of optical structures and the base layer are integrated into a single unit, and the plurality of optical structures are formed on one side of the base layer. The reflective projection screen of claim 1, wherein the second reflective layer extends to the absorption surface and is covered by the light absorption layer. The reflective projection screen according to claim 10, wherein the light absorbing layer extends to the reflective surface and away from the first reflective layer. The reflective projection screen according to claim 11, wherein the second reflective layer is connected to the first reflective layer. The reflective projection screen of claim 12, wherein the area where the second reflective layer can reflect light is smaller than the area where the first reflective layer can reflect light. According to the reflective projection screen described in claim 13, the length of the first reflective layer in a cross section is greater than the length of the second reflective layer in a cross section. The reflective projection screen according to claim 14, wherein a length of the first reflective layer in a cross section is 3 to 4 times a length of the second reflective layer in a cross section. The reflective projection screen according to claim 15, comprising a base layer, and the plurality of optical structures are disposed on the base layer. The reflective projection screen according to claim 16, wherein the plurality of optical structures and the base layer are integrated into a single member, and the plurality of optical structures are formed on one side of the base layer. The reflective projection screen according to any one of claims 1 to 17, wherein the reflectivity of the second reflective layer can be 2 to 8 times the reflectivity of the first reflective layer.