A projection device capable of reducing light interference

Abstract

The application relates to the technical field of projection equipment, in particular to a projection equipment capable of reducing light interference, which comprises a fixed plate, the fixed plate is located at the bottom layer and is used for providing support and preventing equipment deformation; further comprising a light reflection layer, the light reflection layer is fixed on the front side of the fixed plate through a glue layer and is used for reflecting light emitted by a projector in an orthographic projection mode; and an anti-light structure layer, the anti-light structure layer is fixed on the front side of the light reflection layer through a glue layer and is used for absorbing ambient light. According to the application, the anti-light structure is arranged, ambient light can be filtered and absorbed, the interference of ambient light is reduced, the anti-light structure adopts a hexagonal design, compared with a traditional transverse zigzag design, ambient light from the side and the side below can be blocked and absorbed, compared with a Fresnel curtain, the visual angle is larger, the projection effect is ensured, and in addition, the application can be spliced by multiple equipment to form equipment with specific sizes, so that the cost is reduced and installation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a projection equipment capable of reducing light interference. BACKGROUND

[0002] The projection equipment includes a projector and an imaging equipment. Since the imaging of the projection equipment is diffuse reflection, the eyes are less hurt. Meanwhile, the projection equipment has high portability, large imaging size and higher cost performance compared with a television. Therefore, the projection equipment has become the first choice for teaching, office and home entertainment and is widely used in daily life.

[0003] The existing imaging equipment is generally a curtain or a white wall. Common curtain types include a gray plastic curtain, a white plastic curtain, a gray glass fiber curtain, a white glass fiber curtain, a glass bead curtain, a metal curtain, a black grid curtain and a Fresnel curtain. The imaging of the projection equipment is performed by projecting light emitted by the projector onto the curtain or the white wall to realize diffuse reflection imaging. The imaging effect is greatly affected by ambient light. Among the mainstream curtains, the black grid curtain and the Fresnel curtain basically have no light resistance. When the surface of the imaging equipment is irradiated by strong light, the contrast and brightness of the imaging picture of the projection equipment are greatly reduced, so that the viewer cannot clearly see the picture, thereby affecting the use effect. Therefore, the projection equipment needs to be used in a relatively dark scene, which affects the promotion of the projection equipment.

[0004] In the prior art, the mainstream light-resistant curtain includes a Fresnel curtain and a black grid curtain. The Fresnel curtain adopts Fresnel lens technology and has good light resistance but is high in price. Meanwhile, the viewing angle is generally only about 110 degrees. The black grid curtain adopts a horizontal sawtooth structure. The projection light projected from the oblique lower side is reflected, and the ambient light projected from the upper side is absorbed. The viewing angle can generally reach 130-160 degrees. The black grid curtain is cheaper than the Fresnel curtain, but has the problem of weak anti-interference ability of the side ambient light and the side lower ambient light. In addition, the light resistance can also be realized by increasing the brightness of the projection light of the projector. However, the high brightness will affect the heat dissipation and power consumption of the projector and also shorten the service life of the light source equipment of the projector.

[0005] In view of this, the present application provides a projection equipment capable of reducing light interference. SUMMARY

[0006] In order to make up for the above shortcomings, the present application provides a projection equipment capable of reducing light interference.

[0007] The technical scheme of the present application is as follows.

[0008] The projection equipment capable of reducing light interference comprises:

[0009] at least one prefabricated structure block;

[0010] The prefabricated structure block comprises at least:

[0011] A fixing plate is located at the bottom layer, used for providing support and preventing the device from deforming;

[0012] Further comprising:

[0013] A light reflection layer is fixed on the front side of the fixing plate through the adhesive layer, used for reflecting the light emitted by the projector in the front projection mode;

[0014] An anti-light structure layer is fixed on the front side of the light reflection layer through the adhesive layer, used for absorbing ambient light.

[0015] As a preferred technical solution of the present application, the anti-light structure layer comprises a light transmission base layer and an anti-light structure, the light transmission base layer is made of light transmission material, used for providing support for the anti-light structure.

[0016] As a preferred technical solution of the present application, the anti-light structure comprises a light filtering reflection layer and a grating skirt, the light filtering reflection layer and the grating skirt are integrally formed.

[0017] As a preferred technical solution of the present application, the anti-light structure is hexagonal as a whole, the anti-light structures are connected and uniformly distributed on the surface of the light transmission base layer.

[0018] As a preferred technical solution of the present application, the light filtering reflection layer is hexagonal as a whole, and is inclined downward at an angle to the vertical direction.

[0019] As a preferred technical solution of the present application, the grating skirt is hexagonal as a whole, the bottom surface of the grating skirt intersects with the light filtering reflection layer, the height of the grating skirt gradually decreases from bottom to top, and the grating skirt is perpendicular to the vertical direction.

[0020] As a preferred technical solution of the present application, the light filtering reflection layer is made of linearly polarized material, used for filtering the incident light, and the polarization degree is 80%-100%.

[0021] As a preferred technical solution of the present application, the grating skirt is made of light-absorbing material, used for absorbing the ambient light projected onto its surface and the ambient light reflected from the light filtering reflection layer.

[0022] As a preferred technical solution of the present application, the fixing plate is made of light transmission material and cannot be bent.

[0023] As a preferred technical solution of the present application, the length-width ratio of the prefabricated structure block is 4:3, and the prefabricated structure blocks are spliced with each other to form a projection device with a specific size.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] This invention, by setting up an anti-light structure, can filter and absorb ambient light, reducing interference from ambient light. At the same time, the anti-light structure adopts a hexagonal design, which, compared with the traditional horizontal sawtooth design, can block and absorb ambient light from the sides and below. In addition, compared with Fresnel screens, it has a wider viewing angle, ensuring projection effect. Furthermore, this invention can be spliced ​​together by multiple devices to form a device of a specific size, reducing costs and facilitating installation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the forward projection mode in this invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the rear projection mode in this invention;

[0028] Figure 3 This is a schematic diagram of the anti-light structure layer in this invention;

[0029] Figure 4 This is a schematic diagram of the forward projection principle in this invention;

[0030] Figure 5 This is a schematic diagram of the rear projection in this invention;

[0031] Figure 6 This is a schematic diagram of the ambient light rejection method above the side in this invention;

[0032] Figure 7 This is a schematic diagram of the ambient light rejection method from the lower side in this invention;

[0033] Figure 8 This is a schematic diagram of the combination of multiple screen panels in this invention.

[0034] The meanings of the punctuation marks in the diagram are as follows:

[0035] 1. Fixing plate; 2. Adhesive layer; 3. Reflective layer; 4. Anti-light structural layer; 41. Transparent base layer; 42. Anti-light structure; 421. Filter and reflective layer; 422. Grating skirt; 5. Imaging layer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Please see Figures 1-8 The present invention will describe the above technical solution in detail through the following embodiments:

[0039] A projection device that reduces light interference includes:

[0040] Fixing plate 1, located at the bottom layer, is used to provide support and prevent equipment deformation. Fixing plate 1 is made of light-transmitting material and cannot be bent.

[0041] Also includes:

[0042] The reflective layer 3 is fixed to the front side of the fixing plate 1 by the adhesive layer 2, and is used to reflect the light emitted by the projector in the front projection mode.

[0043] The anti-light structural layer 4 is fixed to the front side of the reflective layer 3 by the adhesive layer 2 and is used to absorb ambient light. The anti-light structural layer 4 includes a light-transmitting base layer 41 and an anti-light structure 42. The light-transmitting base layer 41 is made of light-transmitting material and is used to provide support for the anti-light structure 42. The anti-light structure 42 is generally hexagonal. The anti-light structures 42 are connected and evenly distributed on the surface of the light-transmitting base layer 41.

[0044] The anti-light structure 42 includes a light-reflecting filter layer 421 and a grating skirt 422. The light-reflecting filter layer 421 and the grating skirt 422 are integrally formed. The light-reflecting filter layer 421 is hexagonal in shape and tilts downward at an angle to the vertical direction. The light-reflecting filter layer 421 is made of linearly polarizing material and is used to filter the incident light. Its polarization degree is 80% to 100%.

[0045] The grating skirt 422 is hexagonal in shape. The bottom surface of the grating skirt 422 intersects with the light-reflecting filter layer 421. The height of the grating skirt 422 gradually decreases from bottom to top, and the grating skirt 422 is perpendicular to the vertical direction. The grating skirt 422 is made of light-absorbing material and is used to project ambient light onto its surface. It can also absorb ambient light reflected from the light-reflecting filter layer 421.

[0046] Since the grating skirt 422 is hexagonal in shape, when ambient light is projected from directly above or to the upper side, most of the ambient light will be blocked by the bottom surface and the upper left and upper right sides of the grating skirt 422. Because the grating skirt 422 is made of light-absorbing material, this blocked ambient light will be absorbed. A small portion of the unblocked ambient light will be projected onto the surface of the light-filtering reflective layer 421. Since the ambient light enters from the side while the projector's light enters from the front, the optical axes of the ambient light and the projector's light are at different angles. Because the light-filtering reflective layer 421 is made of linearly polarizing material, ambient light with an optical axis angle different from the projector's light will be blocked, allowing only the projector's light to enter. If the ambient light is projected from the lower side, most of the light will be blocked by the lower left and lower right sides of the grating skirt 422 and absorbed by the grating skirt 422. A portion of the ambient light projected onto the surface of the light-filtering reflective layer 421 will be blocked by the light-filtering reflective layer 421 due to the angle of the optical axes.

[0047] Projection equipment can use different materials depending on the projection requirements.

[0048] In forward projection mode, such as Figure 1 As shown, the projection device consists of a fixed plate 1, an adhesive layer 2, a reflective layer 3, an adhesive layer 2, and an anti-light structural layer 4. The fixed plate 1 can be made of materials such as glass or acrylic; the adhesive layer 2 can be made of a known adhesive, such as UV adhesive; the reflective layer 3 can be made of an opaque material, such as metallic coating or reflective microspheres; and in the anti-light structural layer 4, the grating skirt 422 is made of a light-absorbing material.

[0049] The projection process is as follows Figure 4As shown, in front projection mode, the projector is located in front of the screen and diagonally below it. The light from the projector is projected onto the anti-light structure layer 4 from diagonally below. The light emitted by the projector is selected so that the optical axis of the light emitted by the projector is at the same angle as the optical axis of the light filter reflective layer 421. In this way, the light projected by the projector will pass through the light filter reflective layer 421, and then the light will continue to pass through the light-transmitting base layer 41 and be projected onto the reflective layer 3. Since the reflective layer 3 is an opaque material, the light emitted by the projector undergoes total internal reflection at the reflective layer 3, and then passes through the light-transmitting base layer 41, and then through the light filter reflective layer 421 to enter the observer's field of view. Ambient light mainly consists of lamplight, direct sunlight, and sunlight diffused through the bottom or walls. The incident angle of this ambient light is different from the angle of the light projected by the projector. It is generally projected onto the screen from directly above, to the upper side, or to the lower side. This ambient light is usually higher or lower than the observer's viewing angle. At this time, most of the ambient light is blocked by the grating skirt 422. A small part is filtered by the light filter layer 421 because the optical axis is different from the light projected by the projector. The remaining ambient light is basically not refracted to the observer's angle due to the tilt angle of the light filter layer 421, thus not weakening the projection effect and making the projected image clearer. In addition, the reflective layer 3 uses a dark material, which can improve the contrast of the picture and reduce the loss of image brightness. The fixing plate 1 uses a rigid material, which can provide better support for the reflective layer 3 and the anti-light structure layer 4, preventing the image from being distorted due to air flow or gravity.

[0050] In rear projection mode, such as Figure 2 As shown, the overall structure of the projection device consists of an imaging layer 5, an adhesive layer 2, a fixing plate 1, an adhesive layer 2, and an anti-glare structural layer 4, with the projector located on one side of the fixing plate 1. In this mode, the imaging layer 5 is located on the outermost side, i.e., the side where the projector is located. The selected material is a semi-transparent material, such as gray plastic or gray fiberglass, used for imaging. The imaging layer 5 is attached to the front surface of the fixing plate 1 via the adhesive layer 2. The adhesive layer 2 can be a known composite adhesive, such as UV adhesive. The fixing plate 1 can be made of a light-transmitting material, such as acrylic or PVC. If a rigid screen is required, acrylic can be used; if a flexible screen is required, PVC can be used. This invention chooses a rigid screen. The anti-glare structural layer 4 is fixed to the back of the fixing plate 1 via the adhesive layer 2. The materials selected for the light-reflecting filter layer 421 and the grating skirt 422 are the same as in the front projection mode.

[0051] The projection process is as follows Figure 5As shown, the projector is located directly behind the screen. The light emitted by the projector is directly projected onto the imaging layer 5, forming an image on it. The projected light is refracted through the imaging layer 5, then enters the fixing plate 1, then the light-transmitting base layer 41, and finally projects onto the light-filtering and reflecting layer 421. The optical axis of the projected light is at the same angle as the optical axis of the light-filtering and reflecting layer 421. The projected light passes through the light-filtering and reflecting layer 421 and enters the observer's field of view. When ambient light is projected onto the device from the anti-light structure layer 4, most of the ambient light is absorbed by the grating skirt 422, and a small portion is absorbed by the light-filtering and reflecting layer 421. Ambient light is blocked and filtered by the light-reflecting filter layer 421, preventing it from mixing with the projected light from the projector and thus maintaining the imaging effect of the projected light. A portion of the ambient light is projected from the imaging layer 5. Some of this ambient light is reflected back into the environment by the imaging layer 5, while the remaining ambient light passing through the imaging layer 5 is blocked and absorbed by the light-reflecting filter layer 421 because its optical axis angle is different from that of the light-reflecting filter layer 421. This reduces light interference, allowing the light emitted by the projector to enter the viewing angle without being weakened, thus improving the projection imaging effect.

[0052] It should be noted that the size of the anti-light structure 42 and the spacing between them are very subtle and cannot be detected by the human eye.

[0053] The prefabricated structural blocks have a length-to-width ratio of 4:3, and the prefabricated structural blocks are spliced ​​together to form a projection device of a specific size. Users can splice the prefabricated structural blocks to the required size according to actual projection needs.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A projection device capable of reducing light interference, comprising: At least one prefabricated structural block, the prefabricated structural block having a length-to-width ratio of 4:3, and the prefabricated structural blocks being spliced ​​together to form a projection device of a specific size; The prefabricated structural block includes at least: A fixing plate (1) is located at the bottom layer and is used to provide support and prevent the equipment from deforming. Its characteristic is that it further includes: The reflective layer (3) is fixed to the front side of the fixing plate (1) by the adhesive layer (2) and is used to reflect the light emitted by the projector in the front projection mode; An anti-light structural layer (4) is fixed to the front side of the reflective layer (3) by an adhesive layer (2) for absorbing ambient light; The anti-light structure layer (4) includes a light-transmitting base layer (41) and an anti-light structure (42). The light-transmitting base layer (41) is made of light-transmitting material and is used to support the anti-light structure (42). The anti-light structure (42) is generally hexagonal. The anti-light structures (42) are connected and evenly distributed on the surface of the light-transmitting base layer (41). The anti-light structure (42) includes a light-filtering reflective layer (421) and a grating skirt (422). The light-filtering reflective layer (421) and the grating skirt (422) are integrally formed. The light-filtering reflective layer (421) is generally hexagonal and tilts downward at an angle to the vertical direction. The grating skirt (422) is generally hexagonal. The bottom surface of the grating skirt (422) intersects with the light-filtering reflective layer (421). The height of the grating skirt (422) gradually decreases from bottom to top, and the grating skirt (422) is perpendicular to the vertical direction.

2. The projection device with reduced light interference as described in claim 1, characterized in that: The light-filtering reflective layer (421) is made of linearly polarized material and is used to filter incoming light rays, with a polarization degree of 80%-100%.

3. The projection device with reduced light interference as described in claim 1, characterized in that: The grating skirt (422) is made of light-absorbing material and is used to project ambient light onto its surface. It can also absorb ambient light reflected from the filter reflective layer (421).

4. The projection device with reduced light interference as described in claim 1, characterized in that: The fixing plate (1) is made of a light-transmitting material and cannot be bent.

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