CN108563094A

CN108563094A - A kind of projection screen

Info

Publication number: CN108563094A
Application number: CN201810424998.6A
Authority: CN
Inventors: 腾文东
Original assignee: GUANGZHOU AIEN ELECTRONIC Co Ltd
Current assignee: GUANGZHOU AIEN ELECTRONIC Co Ltd
Priority date: 2018-05-04
Filing date: 2018-05-04
Publication date: 2018-09-21

Abstract

The invention discloses a kind of projection screen, composite construction of the first face imaging layer constituted using micro- convex structure with convergence array as the second face of convergence projected light beam.The excessive projected light beam of off-axis has obtained the incidence angle of bigger by the curved surface of horizontal micro- convex structure of arranging successively with multiple infiltration type convex lens so that the brightness of projection screen and the efficiency of optical projection system improve；Especially after image keystone, projected light beam still can be matched to effective incidence angle in the focal power of micro- convex structure curved surface and infiltration type convex lens so that projector's location arrangements are more flexible, and the focal length suitability of screen and projector lens is stronger.

Description

A kind of projection screen

Technical field

The present invention relates to display technology field more particularly to a kind of projection screens.

Background technology

Short focus, ultra short focal projector are widely used for the fields such as teaching, advertising exhibition, are based on lambert's scattering principle in the past Screen the light scattering from projector to all directions, the perfection that cannot achieve short focus, ultrashort out-of-focus projection can only be shown, it is existing Some screens determine different orienting reflex angles according to different projection ratios, the focal length of projector, wherein most using concentric circles Or non-concentric structure setting realizes that projected light beam by parallel or close reflected in parallel, has obtained maximum gain and good visual angle, But the incidence angle of screen needs to match with the focal length between the angle of divergence and projector, if installation site limitation and have to will be inclined When the improper mode such as axis installs projector, such as when overhead is excessively high or bottom sets too low, incidence of the projected light beam relative to screen Angle can it is excessive beyond concentric circles or non-concentric structure focal length receive after range, especially image keystone with concentric circles or non- The incidence angle of concentric structure, angle of reflection cannot match, and lose the function of parallel or close reflected in parallel, and image is caused to show matter Amount is not high.

Invention content

It is an object of the present invention to solve the deficiency of the existing technology and provide a kind of even projection screens in projector In the case that installation deviates normal installed position, the projection screen of good vision effect still can be provided, to meet the need in market It asks.

The invention is realized by the following technical scheme：

A kind of projection screen, including：First face and the second face, first face are one horizontal successively by micro- convex structure The face of arrangement, as imaging surface；Second face is to be arranged in order the convergence array formed by multiple infiltration type convex lens, converges projected light Beam is to imaging surface.

Specifically, the imaging surface is made of multiple micro- convex structures in horizontal array arrangement successively, the dimpling shape knot Structure is that bottom surface is plane, and top surface is the structure of curved surface.

Specifically, the imaging surface is the micro- convex structure of infiltration type, and the projection screen is used for rear projection, the curved surface Receive projected light beam in the planar imaging, and the transmitance of the imaging layer is 50%~99%.

Specifically, the imaging layer is the micro- convex structure of reflection-type, and the projection screen is used for forward projection, the curved surface It is imaged with the plane reflection projected light beam, and the reflectivity of the imaging layer is 50%-99%.

Specifically, on the convergence array aggregation projected light beam to the imaging layer, transmitance=1- reflectivity, and its Transmitance is 50%~99%.

Specifically, the form of micro- convex structure is column, arc or spherical curved surface.

Specifically, the optic shape of the convergence array includes：Column, circle, convex lens shape.

Specifically, the imaging surface is bonded setting each other with the convergence array, and the convergence array is close to projecting apparatus The one side of light source, the imaging surface are the one side far from projector light source.

Specifically, it is described convergence array infiltration type convex lens between spacing be more than the imaging layer micro- convex structure it Between spacing.

The beneficial effects of the invention are as follows：The excessive projected light beam of off-axis passes through horizontal micro- convex structure of arranging successively Curved surface has obtained the incidence angle of bigger with multiple infiltration type convex lens so that the brightness of projection screen and the efficiency of optical projection system carry It is high；Especially after image keystone, projected light beam still can be in the focal power of micro- convex structure curved surface and infiltration type convex lens On be matched to effective incidence so that projector's location arrangements are more flexible, and the focal length suitability of screen and projector lens is stronger.

Description of the drawings

Fig. 1 is a kind of cross-sectional view of projection screen provided in an embodiment of the present invention.

Fig. 2 is that rear projection provided in an embodiment of the present invention passes through projection screen schematic diagram.

Fig. 3 is that forward projection provided in an embodiment of the present invention passes through projection screen schematic diagram.

Fig. 4 is a kind of imaging surface arrangement schematic diagram of projection screen provided in an embodiment of the present invention.

Wherein：Imaging surface 1, plane 11, curved surface 12 converge array 2, projected light beam 3, micro- convex structure 4, infiltration type dimpling Shape structure 41, the micro- convex structure 42 of reflection-type, infiltration type convex lens 5

Specific implementation mode

Embodiment 1：

As shown in Figure 1, a kind of projection screen, including：Two faces.First face is there are one substrate, the horizontal coating on substrate Several micro- convex structures 4 form array, as imaging surface 1；Second face is convergence array 2, and several is in 5 gusts of infiltration type convex lens Row arrangement, convergence projected light beam 3 to imaging surface are prepared and micro- convex structure by techniques such as glue fitting, drying, UV lamp solidifications 4 fittings.

Substrate imaging when to be transparent, and its transmitance be more than be 70%, main material include light modulation film, glass, PMMA, PC, PVC, PS, PET, transparent ABS, transparent PP, transparent PA, nitrocellulose, EVA etc..

As shown in figure 4, it is the structures that plane 11, top surface are curved surface 12 that the section of the imaging surface 1, which is bottom surface,.The curved surface 12 be column, arc or spherical curved surface.The thickness of wherein plane 11 to curved surface 12 is 0.02-0.5mm.

As shown in Fig. 2, when the imaging surface 1 is infiltration type micro- 4 array of convex structure, it is imaged for rear projection, it is described Curved surface 12 receives the projected light beam 3 that projecting apparatus is sent out and is imaged in the plane 11, and projected light beam 3 is because of horizontal infiltration type dimpling The increase of the focal power of the curved surface 12 of 4 array of shape structure and the incidence angle for increasing the projected light beam 3 from vertical direction are realized It is transmitted to the convergence of the plane 11, and the transmitance of the imaging layer 1 is 50%~99%；

As shown in figure 3, the convergence array 2 is 5 shape of infiltration type convex lens, the convergence array 2 aggregation projected light beam 3 to On the imaging layer 1, the optic shape of the convergence array 2 includes：Column, circle, convex lens shape.

One side close to projecting apparatus is the convergence array 2, and the one side far from projector light source is the imaging surface 1, is converged 5 spacing of convex lens in poly- array 2 is more than the spacing of micro- convex structure 4 in imaging surface 1.A part for light source is through convergence battle array Row 2 focus on imaging surface 1 a little rear dispersion after being accumulated by the form of the light source disperseed is projected, and another part is directly mapped into Disperse to project after image planes 1, imaging surface 1 is bonded setting so that imaging is more uniform with convergence array 2.

Embodiment 2：

As shown in Figure 1, a kind of projection screen includes：One horizontal micro- 4 array of convex structure of arrangement is located at the first face, It is imaging surface 1；Second face is convergence array 2, and several is in 5 array of shapes of infiltration type convex lens, convergence projected light beam 3 to imaging Face.

As shown in Fig. 2, it is the structures that plane 11, top surface are curved surface 12 that the section of the imaging surface 1, which is bottom surface,.The curved surface 12 be column, arc or spherical curved surface.

As shown in figure 3, when the imaging layer 1 is reflection-type micro- 4 array of convex structure, imaging surface 1 for forward projection at Picture is increased due to the focal power of the curved surface 12 provided with micro- 4 array of convex structure of horizontal reflection-type from Vertical Square To projected light beam 3 incidence angle, the curved surface 12 and 11 reflected projection beam 3 of the plane be imaged, and the imaging layer Reflectivity is 50%-99%.

As shown in Fig. 2, convergence array 2 is 5 shape of infiltration type convex lens, the optic shape of convergence array 2 includes：Column, circle Shape, convex lens shape.It converges array 2 to assemble on projected light beam 3 to the imaging layer 1, and its transmitance is 50%~99%, transmitance =1- reflectivity.

It is the convergence array 2 close to one end of projecting apparatus, one end far from projecting apparatus is the imaging surface, this screen In structure, the spacing of 5 array of shapes of convex lens of the convergence array 2 is more than 4 array of micro- convex structure of the imaging layer 1 Spacing improves imaging by converging the combination of light reflection of the light convergence of array 2 and 4 array of micro- convex structure of imaging layer 1 Efficiency ensure that clarity and brightness.In terms of personage represents viewing face in figure.

It these are only the specific implementation mode of the present invention, but scope of protection of the present invention is not limited thereto, it is any at this The direct variation made under the thought of invention and replacement, should all cover within the scope of the present invention.

Claims

1. a kind of projection screen, which is characterized in that including：First face and the second face, first face are one by dimpling shape knot The face of structure horizontal arrangement successively, as imaging surface；Second face is to be arranged in order the convergence array formed by multiple infiltration type convex lens, Projected light beam is converged to imaging surface.

2. a kind of projection screen according to claim 1, it is characterised in that：The imaging surface is in by multiple micro- convex structures Horizontal array arrangement successively forms, and micro- convex structure is that bottom surface is plane, and top surface is the structure of curved surface.

3. a kind of projection screen according to claim 2, it is characterised in that：The imaging surface is infiltration type dimpling shape knot Structure, the projection screen are used for rear projection, and the curved surface receives projected light beam and is imaged in the bottom surface, and the imaging layer Transmitance is 50%~99%.

4. a kind of projection screen according to claim 2, it is characterised in that：The imaging layer is reflection-type dimpling shape knot Structure, the projection screen are used for forward projection, and the top surface is imaged with the bottom reflection projected light beam, and the imaging layer Reflectivity is 50%-99%.

5. according to a kind of projection screen described in any one of claim 1-4 claims, it is characterised in that：The convergence battle array On row aggregation projected light beam to the imaging layer, transmitance=1- reflectivity, and its transmitance is 50%~99%.

6. according to a kind of projection screen described in any one of claim 1-4 claims, it is characterised in that：The dimpling shape The form of structure is column, arc or spherical curved surface.

7. according to a kind of projection screen described in any one of claim 1-4 claims, it is characterised in that：The convergence battle array The optic shape of row includes：Column, circle, convex lens shape.

8. according to a kind of projection screen described in any one of claim 1-4 claims, it is characterised in that：The imaging surface It is bonded setting each other with the convergence array, the convergence array is the one side close to projector light source, and the imaging surface is remote One side from projector light source.

9. according to a kind of projection screen described in any one of claim 1-4 claims, it is characterised in that：The convergence battle array Spacing between the infiltration type convex lens of row is more than the spacing between micro- convex structure of the imaging layer.