CN214409577U - Light-resistant orthographic projection screen - Google Patents

Abstract

A light-resistant front projection screen sequentially comprises a glare-resistant layer for preventing glare, a grating layer, a filter layer for filtering ambient light to improve the contrast of a picture, a reflecting layer for reflecting projection light and a backlight layer for shielding ambient light on the back side, wherein a plurality of micro gratings which are distributed at intervals and used for resisting the ambient light to improve the contrast of the picture are arranged in the grating layer; the utility model discloses a screen is just throwing to anti light is equipped with grating layer and filter layer, miniature grating in the grating layer can shelter from the absorption to the ambient light that comes from projection screen front top, thereby effectively filter most ambient light, and the small part ambient light that is not filtered and absorbed by grating layer then can further be filtered by the filter layer and filter, thereby the interference of very big reduction ambient light to the projection light, make the projection image not basically receive the influence of ambient light, and then improve the contrast of projection picture greatly, guarantee the display effect of projection picture. The utility model discloses a screen is just throwing to anti light can effective filtration and restrain the ambient light and improve the display effect greatly.

Description

Light-resistant orthographic projection screen

[ technical field ] A method for producing a semiconductor device

The utility model relates to a projection screen, in particular to can resist ambient light and improve anti light of picture contrast and throw the curtain just.

[ background of the invention ]

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 theater entertainment, etc. Projection screens are generally classified into front projection screens and rear projection screens. The front projection screen relies on the principle of reflection, 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. The rear projection screen relies on the principle of transmission, the projection device is placed on the back side of the projection screen (on both sides of the projection screen with the viewer), and the projected light is transmitted through the projection screen and enters human eyes. The front projection screen can be made into any size, but the environment light needs to be controlled to obtain a good viewing effect. When the ambient light is stronger, the picture contrast is lower, and the presented projection picture becomes white and grey, so that the picture quality is reduced, and the viewing experience is influenced. Therefore, for the forward projection screen, if the interference of the ambient light can be reduced and the picture contrast can be improved, the picture quality can be greatly improved and the product competitiveness can be improved.

[ Utility model ] content

The utility model aims at solving the above problems, and provides a light-resistant projection screen capable of filtering ambient light and improving picture contrast.

In order to solve the above problems, the utility model provides a light-resistant positive projection screen, which is characterized in that the screen comprises an anti-glare layer, a grating layer, a filter layer, a reflecting layer and a backlight layer in sequence, wherein the anti-glare layer is provided with a frosted surface for anti-glare; a plurality of miniature gratings which are distributed at intervals and used for resisting ambient light and improving the picture contrast are arranged in the grating layer; the filter layer is used for filtering ambient light to improve the image contrast; the reflecting layer is used for reflecting projection light; the backlight layer is used for shielding back side ambient light.

Further, the filter layer is a gray mirror.

Further, the backlight layer is made of a black material.

Furthermore, the grating layer is provided with a plurality of grating grooves which are distributed along the transverse direction, and the inner walls of the grating grooves are provided with the micro gratings.

Further, the micro-grating is formed by coating light absorption materials on the inner wall of the grating groove.

Further, the opening of the grating groove faces the filter layer.

Further, the grating groove is provided with a first inner wall and a second inner wall, the first inner wall and the second inner wall are connected to form an acute angle, and the first inner wall and the second inner wall are inclined to the filter layer.

Furthermore, the micro grating is arranged on the first inner wall and the second inner wall.

Further, a light-transmitting area is arranged between the micro gratings and is made of light-transmitting materials.

The beneficial contributions of the utility model reside in that, it has effectively solved above-mentioned problem. The utility model discloses an anti light is just throwing the curtain and is equipped with grating layer and filter layer, wherein the miniature grating in the grating layer can shelter from the absorption to the ambient light that comes from projection screen front top, thereby effectively filter most ambient light, and the small part ambient light that is not filtered the absorption by the grating layer then can further be filtered by the filter layer and filter, thereby the interference of very big reduction ambient light to the projection light, make the projection image not basically receive the influence of ambient light, and then improve the contrast of projection picture greatly, guarantee the display effect of projection picture. The utility model discloses a curtain is just throwing to anti light can effective filtration and restrain the ambient light and improve the display effect greatly, and it has very strong practicality.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the principle of light resistance.

The attached drawings are as follows: the backlight module comprises a glare layer 10, a grating layer 20, a micro grating 21, a grating groove 22, a first inner wall 221, a second inner wall 222, a light transmission area 23, a filter layer 30, a reflection layer 40 and a backlight layer 50.

[ 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, the anti-light positive projection screen of the present invention sequentially includes an anti-glare layer 10, a grating layer 20, a filter layer 30, a reflective layer 40, and a backlight layer 50.

As shown in fig. 1 and 2, the anti-glare layer 10 is located at the outermost side of the projection screen, and in use, the anti-glare layer directly faces the user, and is used for diffusing the projection light to various angles, preventing glare, avoiding dazzling, and facilitating the user to view the projection picture from various angles. The surface of the antiglare layer 10 is frosted, which may be frosted by a known process.

As shown in fig. 1 and fig. 2, the grating layer 20 is used for blocking and absorbing ambient light, and filtering most of the ambient light, so that most of the ambient light cannot enter the next layer of structure, thereby reducing the influence of the ambient light on the projection light. The interior of the grating layer 20 is provided with a plurality of micro gratings 21 distributed at intervals, and the micro gratings 21 are made of light absorption materials and can shield and absorb ambient light to inhibit the ambient light.

Specifically, the grating layer 20 is uniformly provided with a plurality of grating grooves 22 extending along the width direction of the projection screen. The opening of the grating groove 22 faces away from the antiglare layer 10 toward the filter layer 30. The width of the opening of the grating groove 22 is 1-5 mm, and in this embodiment, it is preferably 2 mm. The grating grooves 22 extend in the width direction of the projection screen, and extend transversely from one end of the projection screen to the other end of the projection screen. As shown in fig. 1 and 2, the cross section of the grating groove 22 is an isosceles triangle or an isosceles trapezoid, which includes a first inner wall 221 and a second inner wall 222. The first inner wall 221 is connected to the second inner wall 222, and an included angle therebetween is an acute angle. The first inner wall 221 and the second inner wall 222 are respectively inclined from the filter layer 30, and the inclination angles thereof can be set according to requirements. In this embodiment, the grating grooves 22 have the same shape and size, and are uniformly distributed. Micro-gratings 21 made of light absorbing material are respectively disposed on the first inner wall 221 and the second inner wall 222. The light absorbing material includes, but is not limited to, black ink, which is less reflective to light and thus has the effect of absorbing ambient light. The micro gratings 21 are transversely distributed in the grating layer 20, and can shield the ambient light from the front upper part of the projection screen, so that the ambient light is difficult to be incident into the next layer of structure, thereby reducing the interference of the ambient light and improving the contrast of the projection picture.

As shown in fig. 1 and 2, a light-transmitting region 23 is located between two adjacent grating grooves 22. The light-transmitting region 23 is made of a transparent material, for example, transparent resin, transparent PET, transparent glass, transparent UV glue, or the like. In this embodiment, the light-transmitting region 23 of the grating layer 20 is formed by curing a transparent UV glue. The grating layer 20 is formed by the light-transmitting areas 23 and the micro-gratings 21 on the inner walls of the grating grooves 22.

When the ambient light enters from the front upper side of the projection screen, and passes through the antiglare layer 10 and enters the grating layer 20, most of the ambient light will reach the micro grating 21, so as to be shielded and absorbed by the micro grating 21, and the projection light emitted by the projection apparatus enters the latter structural layer mainly through the light-transmitting region 23.

The filter layer 30 is used to further filter ambient light and serves to selectively filter and fuse the light beams from the projection device from a particular direction. In this embodiment, the filter layer 30 is a gray mirror, which has a uniform absorption characteristic in the visible light range, and has a light blocking effect by reducing the amount of light passing therethrough, and has no influence on the color while blocking light. When most of the ambient light passes through the grating layer 20 and is absorbed by the micro-grating 21, a small portion of the unabsorbed ambient light reaches the filter layer 30 along with the projection light. Under the effect of the filter layer 30, the ambient light is blocked and filtered, the projection light is also blocked and loses some luminous flux, however, because the light intensity of the projection light is much greater than that of the ambient light, the luminous flux lost by the projection light is a little part relative to the whole projection light, and the luminous flux lost by the ambient light is a great part or even all relative to the whole ambient light reaching the filter layer 30, therefore, after passing through the filter layer 30, the ambient light is filtered, and the projection light is only a little lost part. After the ambient light is filtered, the projection light cannot be interfered, and the contrast of a projection picture is greatly improved; and a part of the light flux loss of the projection light is very little, and only slight change of the brightness is influenced, so that the visual effect presented by the whole is that the contrast of the picture visible by naked eyes is improved.

As shown in fig. 1 and 2, the reflective layer 40 is used for reflecting the projection light, so that the projection light is reflected back to the front side of the projection screen and enters the human eye. The reflective layer 40 is disposed on the back side of the filter layer 30, and is usually made of a light-colored material such as white, silver white, etc., which has a better reflection effect on light.

The backlight layer 50 is disposed on the back side of the reflective layer 40 and is used for shielding the ambient light on the back side of the projection screen to reduce the influence of the ambient light on the projection image, thereby improving the contrast of the projection image. The backlight layer 50 is made of a black material, and may be a hard structural layer or a soft structural layer. For example, the backlight layer 50 may be a black ink layer formed by coating black ink on the back side of the reflective layer 40. For another example, the backlight layer 50 may be formed by laminating a black resin layer on the reflective layer 40.

Therefore, the anti-light positive projection screen of the present invention is formed, which sequentially comprises an anti-glare layer 10, a grating layer 20, a filter layer 30, a reflective layer 40, and a backlight layer 50. Wherein, the side where the anti-glare layer 10 is located is the side that is viewed by the viewer, namely the front side; the side on which the backlight layer 50 is located is the side facing away from the viewer, i.e. the back side.

The utility model discloses an anti light principle of curtain is just throwing to anti light as follows:

when the projector is used, as shown in fig. 2, the projector is disposed in front of the projection screen, and when the projection light emitted by the projector enters the projection screen, the projection light passes through the antiglare layer 10, the light-transmitting region 23 in the grating layer 20, and the filter layer 30 in sequence, enters the reflective layer 40, and is reflected back toward the viewer by reflection of the reflective layer 40, so as to enter human eyes to enable the user to view the projection picture. The anti-glare layer 10 can prevent glare and enable viewers at various positions to view the projection images.

Ambient light, such as lamp light, is typically injected from an obliquely above the projection device. When the ambient light passes through the antiglare layer 10 and enters the grating layer 20, the ambient light is emitted to the micro grating 21 and is shielded and absorbed, so that most ambient light cannot reach the next layer structure; the ambient light which is not shielded and absorbed by the micro grating 21 passes through the light-transmitting area 23 of the grating layer 20 and then reaches the filter layer 30, and the ambient light is filtered (i.e., blocked) by the filter layer 30, so that the ambient light is basically filtered and cannot enter the reflecting layer 40 as the projection light, the interference of the ambient light such as sunlight and light to projection imaging can be greatly reduced, the contrast of a projection picture is improved, and the display effect is improved. In addition, the backlight layer 50 is black, and the ambient light at the rear side of the projection screen is absorbed and shielded by the backlight layer 50, so that the interference of the ambient light on the projection imaging can be further reduced, and the display effect of the projection picture can be further improved.

The utility model discloses a screen is just throwing to anti light can effective filtration and restrain the ambient light, makes the projection picture not influenced by ambient light, and its contrast and the display effect that can improve the projection picture greatly.

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. An anti-light orthographic projection screen, comprising in order:

an antiglare layer (10) provided with a frosted surface for antiglare purpose;

the grating layer (20) is internally provided with a plurality of micro gratings (21) which are distributed at intervals and used for resisting ambient light and improving the picture contrast;

a filter layer (30) for filtering ambient light to improve picture contrast;

a reflective layer (40) for reflecting the projection light;

a backlight layer (50) for blocking back side ambient light.

2. The screen of claim 1, wherein the filter layer (30) is a gray mirror.

3. A screen for resisting light forward projection as claimed in claim 1, characterized in that the backlight layer (50) is made of a black material.

4. The screen of claim 1, wherein the grating layer (20) has a plurality of grating grooves (22) distributed in the transverse direction, and the micro-gratings (21) are disposed on the inner walls of the grating grooves (22).

5. The screen of claim 4, wherein the micro-gratings (21) are formed by coating a light absorbing material on the inner walls of the grating grooves (22).

6. The screen of claim 4, wherein the grating grooves (22) open towards the filter layer (30).

7. The screen of claim 4, wherein the grating grooves (22) have a first inner wall (221) and a second inner wall (222), the first inner wall (221) and the second inner wall (222) are connected to form an acute angle, and the first inner wall (221) and the second inner wall (222) are both inclined to the filter layer (30).

8. The screen of claim 7, wherein the micro-gratings (21) are disposed on the first inner wall (221) and the second inner wall (222).

9. A screen as claimed in claim 1, wherein between the micro-gratings (21) are transparent areas (23) made of a transparent material.

Images