CN219552826U - Front projection screen with uniform brightness - Google Patents

Abstract

The utility model provides a bright even orthographic projection screen, its characterized in that, it includes stratum basale and even light reflection layer, even light reflection layer includes a plurality of stupefied bellying that set up along transversely, stupefied bellying is equipped with along transversely extending's reflecting surface, is equipped with a plurality of columnar protruding portions along vertical setting between two adjacent stupefied bellying, columnar protruding portion is equipped with semi-cylindrical columnar surface, columnar surface is kept away from the stratum basale the coating has reflecting material on the columnar surface of the reflecting surface of stupefied bellying and columnar protruding portion. The prismatic protruding parts are arranged transversely to be beneficial to reflecting projection light towards the up-down direction of the projection screen, the columnar protruding parts are arranged vertically to be beneficial to reflecting the projection light towards the left side and the right side of the projection screen, so that the projection light can be distributed more uniformly instead of being concentrated in a central area, and the display brightness of a projection picture can be more uniform.

Description

Front projection screen with uniform brightness

[ field of technology ]

The present utility model relates to projection screens, and more particularly to a front projection screen with uniform brightness.

[ background Art ]

Projection screens are tools that cooperate with projectors to display images, video screens, etc., and are commonly used in commercial advertising, teaching, office, home or theatre entertainment applications, etc. Projection screens are generally classified into front projection screens and rear projection screens. The front projection screen relies on the reflection principle, and the projection device is placed in front of the projection screen (on the same side as the viewer), and the projection screen reflects the projection light. Rear projection screens rely on the transmission principle, where the projection device is placed on the rear side of the projection screen (on both sides of the projection screen, respectively, with the viewer), and the projection light is transmitted through the projection screen and into the human eye. The existing front projection screen is mainly characterized in that an imaging layer is directly processed on the surface of a base material and used for reflecting projection light, the structure is large in light reflection, specular reflection is easy to form, the problem of uneven viewing brightness is easy to occur, and the problem of brightness of a region when a person looks at a picture at a position of the screen is easy to occur. In addition, the front projection screen can be made into any size, but the environment light needs to be controlled to obtain good viewing effect. When the ambient light is stronger, the picture contrast is lower, and the displayed projection picture can be whitened and grey, so that the picture quality is reduced, and the viewing experience is affected. Therefore, for the forward projection, if the interference of the ambient light can be reduced, and the contrast and the brightness uniformity of the picture can be improved, the picture quality can be greatly improved, and the product competitiveness can be improved.

[ utility model ]

The present utility model is directed to solving the above-described problems and providing a uniform brightness front projection screen that can improve brightness uniformity and contrast.

In order to solve the above problems, the present utility model provides a front projection screen with uniform brightness, which is characterized in that the front projection screen comprises a substrate layer and a light-homogenizing reflection layer, the light-homogenizing reflection layer comprises a plurality of prismatic protruding parts arranged along the transverse direction, the prismatic protruding parts are provided with reflecting surfaces extending along the transverse direction, a plurality of columnar protruding parts arranged along the vertical direction are arranged between two adjacent prismatic protruding parts, the columnar protruding parts are provided with semi-cylindrical columnar surfaces, the columnar surfaces are far away from the substrate layer, and reflecting materials are coated on the reflecting surfaces of the prismatic protruding parts and the columnar surfaces of the columnar protruding parts.

Further, the extending direction of the corrugated convex part is perpendicular to the extending direction of the columnar convex part.

Further, the plurality of prismatic protruding parts are distributed in concentric arcs.

Further, the columnar protruding parts are distributed in an array.

Further, the columnar projections located in the same lateral direction are adjacent to each other.

Further, the fillet includes a light absorbing surface perpendicular to the base layer, with a light absorbing material coated on the light absorbing surface.

Further, the reflecting surface intersects the light absorbing surface, the substrate layer.

Further, one end of the columnar projection is spaced from the reflecting surface, and the other end abuts the light absorbing surface.

Further, the height of the rib-like raised portion is greater than the camber of the columnar raised portion.

Further, the substrate layer is a black structure layer;

an anti-glare layer is provided on a surface of the light-homogenizing reflection layer on a side remote from the base layer.

The present utility model has an advantageous contribution in that it effectively solves the above-mentioned problems. The front projection screen with uniform brightness is provided with the uniform light reflection layer, the uniform light reflection layer is internally provided with the prismatic protruding parts and the columnar protruding parts, the prismatic protruding parts are transversely arranged to be beneficial to reflecting projection light towards the up-down direction of the projection screen, the columnar protruding parts are vertically arranged to be beneficial to reflecting the projection light towards the left side and the right side of the projection screen, so that projection light can be distributed more uniformly instead of being concentrated in a central area, and the display brightness of a projection picture can be more uniform. In addition, the light absorption surface is arranged on the corrugated bulge, and the light absorption surface is coated with a light absorption material, so that the light absorption material can absorb ambient light to reduce interference of the ambient light on a projection picture, and further, the picture contrast ratio can be improved. The front projection screen with uniform brightness has the characteristics of novel structure, high picture contrast and more uniform brightness, has strong practicability and is suitable for great popularization.

[ description of the drawings ]

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic plan view of a corrugated boss.

FIG. 3 is a schematic plan view of a corrugated boss.

The attached drawings are identified: the light-homogenizing reflective layer 20, the ridge-shaped convex portion 21, the light-absorbing surface 211, the reflective surface 212, the columnar convex portion 22, and the columnar surface 221.

[ detailed description ] of the utility model

The following examples are further illustrative and supplementary of the present utility model and are not intended to limit the utility model in any way.

As shown in fig. 1 to 3, the front projection screen of the present utility model having uniform brightness includes a base layer 10 and a uniform light reflection layer 20. Further, it may further include an anti-glare layer.

The substrate layer 10 is used for carrying the light-homogenizing reflection layer 20. The substrate layer 10 is not limited in material, and may be made of a known material. The substrate layer 10 may be a hard material or a soft material, and may be provided as needed.

To enhance the ability to interfere with ambient light to enhance the contrast of the projected image, the base layer 10 is preferably a black structural layer. In normal use, the substrate layer 10 faces away from the viewer, and can absorb the ambient light on the back side of the projection screen, so as to avoid the interference of the ambient light on the back side on the projection screen.

The base layer 10 may be a black structure layer, and may be made of a black material as a whole, or may be formed by spraying black ink on a non-black material, so long as it is black and absorbs ambient light on the back side.

As shown in fig. 1, the light-homogenizing reflective layer 20 is configured to change the reflective direction of the projection light, so as to make the distribution of the projection light more uniform, thereby improving the brightness uniformity of the projection screen. In addition, the dodging reflective layer 20 is also used for shielding and absorbing the ambient light in front of and above the projection screen to improve the picture contrast.

The light-homogenizing reflecting layer 20 comprises a plurality of prismatic protruding parts 21 arranged along the transverse direction and a plurality of columnar protruding parts 22 arranged along the vertical direction.

The ridge-like projection 21 is provided in the lateral direction of the projection screen, and extends from one end to the other end in the lateral direction. In some embodiments, as shown in fig. 2, the rib-like protrusions 21 extend straight in the lateral direction, which is perpendicular to the extending direction of the vertically disposed columnar protrusions 22. In some embodiments, as shown in fig. 3, the ridges 21 extend in a transverse curvature, and several ridges 21 are distributed in concentric arcs, thereby forming a fresnel-like structure.

The ridge-like protrusions 21 are provided with a plurality of surfaces, which are provided with at least a reflecting surface 212 extending in the lateral direction. The reflective surface 212 is coated with a reflective material that reflects the projected light. The reflecting surface 212 may reflect the projection light toward both upper and lower sides of the projection screen, thereby changing the original distribution of the projection light.

The reflecting surface 212 may be a plane or an arc surface, and may be specifically set as required. In this embodiment, the reflecting surface 212 is a plane that is inclined with respect to the substrate layer 10. The angle of inclination of the reflecting surface 212 may be set as desired. The inclination angle of the reflecting surface 212 of each ridge-like projection 21 may be the same or different, and may be specifically set as required.

Further, the ridge-like protrusions 21 are further provided with light absorbing surfaces 211 extending in the lateral direction for absorbing ambient light and reducing interference of the ambient light. The light absorbing surface 211 is coated with a light absorbing material for absorbing ambient light.

The light absorbing material and the reflecting material can be known materials, wherein the light absorbing material refers to materials with strong light absorbing capacity, such as black ink, paint and the like, and the reflecting material refers to materials with strong reflecting capacity, such as silver paint, pearl paint and the like.

Further, the light absorbing surface 211 is perpendicular to the substrate layer 10, so when the dark light absorbing material is disposed on the light absorbing surface 211, the projected area of the dark light absorbing material on the front surface of the projection screen is very small, which does not cause the user to feel that black stripes are formed on the projection screen, so that the dark light absorbing material can absorb ambient light while minimizing the influence on the brightness of the projection screen, and avoid the dark light absorbing material from affecting the display effect of the projection screen. The reflective surface 212 is disposed at an angle that may be set according to the relationship of the projection device to the projection screen. In this embodiment, the reflecting surface 212 intersects the substrate layer 10, the light absorbing surface 211.

The columnar projections 22 are provided between the ridge-like projections 21, which are arranged vertically along the projection screen.

Between two adjacent ones of the prismatic projections 21, a plurality of columnar projections 22 are provided so that a plurality of columnar projections 22 are provided in both the lateral and vertical directions of the projection screen. For convenience of processing, the columnar protruding parts 22 are distributed in an array, and the distances between the columnar protruding parts 22 are consistent. In this embodiment, the columnar projections 22 located in the same lateral direction are connected to each other with a distance therebetween of zero.

The columnar boss 22 is provided with a semi-cylindrical columnar surface 221. The cylindrical surface 221 is remote from the substrate layer 10. In other words, the columnar projections 22 protrude in the same direction as the ridge projections 21.

The columnar surface 221 is coated with a reflective material for reflecting the projection light, so that the projection light is reflected toward the left and right sides of the projection screen, thereby changing the original distribution of the projection light.

One end of the columnar boss 22 is spaced from the reflecting surface 212, and the other end abuts the light absorbing surface 211. In other words, the columnar projections 22 are relatively independent of the structure of the corrugated projections 21.

To improve the interference resistance of the projection screen to ambient light, the height of the columnar projections 22 is lower than the height of the corrugated projections 21. Projection screens are often subject to interference from ambient light, such as sunlight, lights, etc., from above the projection screen when in use. When ambient light is incident on the light-homogenizing reflecting layer 20, since the height of the light-absorbing surface 211 is higher than that of the columnar projections 22, most of the ambient light can be incident on the light-absorbing material on the light-absorbing surface 211 and absorbed, and a small portion can be incident on the reflecting surface 212 and the columnar projections 22 below the light-absorbing surface 211.

Because the surface of the light-homogenizing reflecting layer 20 is uneven, an anti-glare layer may be further disposed on a side of the light-homogenizing reflecting layer 20 facing away from the substrate layer 10 to avoid dust accumulation.

The antiglare layer is made of a transparent material, which is compounded on the surface of the light-homogenizing reflecting layer 20. The surface of the anti-dazzle layer is frosted, so that the anti-dazzle layer can avoid glare effect, and projection light scattering is facilitated to improve the visual angle.

In some embodiments, the antiglare layer may be directly laminated on the surface of the light-homogenizing reflecting layer 20 by a transparent film material, and an air gap is formed between the light-homogenizing reflecting layer 20 and the antiglare layer. Because the refractive indexes of the air and the anti-dazzle layer are generally different, the transmission angle of the projection light can be further changed due to the existence of the air gap, so that the light angle is more diversified, thereby being beneficial to improving the visual angle and avoiding the generation of speckles.

In some embodiments, the antiglare layer may be formed by a transparent material filling the surface of the light homogenizing reflective layer 20, which will fill up the surface of the light homogenizing reflective layer 20, making the projection screen surface more flat and stiff.

Thus, the front projection screen with uniform brightness of the utility model is formed. In use, the base layer 10 is positioned on the rear side of the viewing direction facing away from the projection device and the antiglare layer is positioned on the front side of the viewing direction facing toward the projection device. Projection light emitted from the projection device is incident into the light-homogenizing reflective layer 20 through the anti-glare layer, and is reflected by the reflective material of the reflective surface 212 and the columnar surface 221, so that light is emitted toward the viewer through the anti-glare layer, thereby allowing the viewer to view the projection screen. The reflective surface 212 is disposed along a lateral slope, which is beneficial to reflect the projection light in an up-down direction, and the columnar surface 221 is disposed along a vertical direction, which is beneficial to reflect the projection light in a left-right direction, so that the distribution manner of the projection light can be changed to make the distribution more uniform, and the effect that the display brightness of the projection screen is basically consistent when the projection screen is watched in any direction is achieved. When the ambient light above the projection screen passes through the anti-glare layer and reaches the uniform light reflection layer 20, the ambient light will be mainly incident on the light absorption material of the light absorption surface 211, so that the ambient light can be absorbed and can not reach or very little reach the reflective material of the reflection surface 212 or the columnar surface 221, thereby avoiding the interference of the ambient light on the projected light and further improving the contrast of the picture. While ambient light on the back side of the projection screen is blocked and absorbed by the substrate layer 10. The front projection screen with uniform brightness has the characteristics of novel structure, high contrast and uniform brightness, and has strong practicability.

Although the present utility model has been disclosed by the above embodiments, the scope of the present utility model is not limited thereto, and each of the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the present utility model.

Claims (10)

1. The utility model provides a bright even orthographic projection screen, its characterized in that includes stratum basale (10) and even light reflection layer (20), even light reflection layer (20) are including a plurality of stupefied bellying (21) along transversely setting, stupefied bellying (21) are equipped with along transversely extending's reflecting surface (212), are equipped with a plurality of columnar protruding portion (22) along vertical setting between two adjacent stupefied bellings (21), columnar protruding portion (22) are equipped with semi-cylindrical columnar surface (221), columnar surface (221) keep away from stratum basale (10) reflecting material has been coated on reflecting surface (212) of stupefied bellying (21) and columnar surface (221) of columnar protruding portion (22).

2. A front projection screen of uniform brightness as claimed in claim 1, wherein the direction of extension of the prismatic projection (21) is perpendicular to the direction of extension of the columnar projection (22).

3. A front projection screen of uniform brightness as claimed in claim 1, characterized in that the ridges (21) are arranged in concentric arcs.

4. A uniform brightness front projection screen as claimed in claim 1, wherein the columnar projections (22) are distributed in an array.

5. A front projection screen of uniform brightness as claimed in claim 1, characterized in that several columnar projections (22) located in the same lateral direction are adjacent to each other.

6. A front projection screen of uniform brightness as claimed in claim 1, characterized in that the ridge-like projections (21) comprise a light-absorbing surface (211) perpendicular to the base layer (10), the light-absorbing surface (211) being coated with a light-absorbing material.

7. A front projection screen of uniform brightness according to claim 6, characterized in that the reflecting surface (212) intersects the light absorbing surface (211), the substrate layer (10).

8. A front projection screen of uniform brightness as claimed in claim 7, wherein one end of the columnar projection (22) is spaced from the reflective surface (212) and the other end abuts the light absorbing surface (211).

9. A front projection screen of uniform brightness according to claim 1, characterized in that the height of the ridge-like protrusions (21) is greater than the camber of the columnar protrusions (22).

10. The uniform brightness front projection screen of claim 1,

the substrate layer (10) is a black structural layer;

an anti-glare layer is provided on a surface of the light-homogenizing reflection layer (20) on a side remote from the base layer (10).