CN203673215U

CN203673215U - Black-matrix optical gradually-changing reflection angle super-short focus orthographic projection screen

Info

Publication number: CN203673215U
Application number: CN201420035441.0U
Authority: CN
Inventors: 黄文水
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-20
Filing date: 2014-01-20
Publication date: 2014-06-25
Anticipated expiration: 2024-01-20

Abstract

The utility model relates to a black-matrix optical gradually-changing reflection angle super-short focus orthographic projection screen including a screen substrate, three layers of reflective films are glued on the front side of the screen substrate, a black matrix layer, which is coated with a plurality of fine black triangular raster strips side by side, is printed and bonded on the front side of the most front reflective film layer, the black matrix layer surface of each triangular raster strip is vertical to the plane of the substrate, the included angle between every adjacent black matrix layer surface of the adjacent triangular raster strip and reflective layer surface is successively increased from the bottom to the top as shown in formula Delta beta =0.3 alpha/1000L, in the formula, alpha is an incident included angle of a super-short focus projector to a screen projection frame, and L is a height value of the projection frame. According to the utility model, the triangular raster strips on the black matrix layer are in a structure with gradually changing angles, when the screen provided is used, reflection light rays change along the variation of the projection light ray angle of the projector, so that the projection light rays can emit out vertical to the screen, and the brightness and contrast of the projection frame can be improved.

Description

Black grid optics is by becoming the ultrashort burnt front projection screen of reflection angle

Technical field

The utility model belongs to optical projection display technique field, relates to a kind of black grid optics by becoming the ultrashort burnt front projection screen of reflection angle.

Background technology

In prior art, in increasing Projection Display case, client does not provide enough spaces, so ultrashort focus projector arises at the historic moment.Due to the particular design of ultrashort focus projector camera lens, can make it project super large picture in short distance, therefore, for the homogeneity of screen, higher requirement is proposed.Known general type projection in the market (just throw, rear-projection) display screen is because the light path according to ultrashort focus projector not requires to design, so the picture projecting is very high in the position brightness near projector, greatly reduce in the local brightness away from projection, the solar facula that namely we often say is serious, thereby cause brightness irregularities, in addition the surround lighting beyond projection ray is not done to any processing, so projection image contrast is low, poor contrast, image sharpness is bad.

Utility model content

The purpose of this utility model is the problem of prior art existence to solve, and provides a kind of and meets ultrashort focus projector light path requirement and can make brightness of image and image contrast obtain the black grid optics of bringing into play to the limit by becoming the ultrashort burnt front projection screen of reflection angle.

For achieving the above object and adopt technical scheme as described below:

A kind of black grid optics is by becoming the ultrashort burnt front projection screen of reflection angle, there is a screen substrate of being made by polymer composite, binding and being provided with three layers of reflective membrane above in screen substrate, there is one deck to be coated with side by side the black grid layer of the fine triangular grating striped of multiple tracks black on it in the pressure viscosity above of anterior layer reflective membrane, on black grid layer, the grid line width of the triangular grating striped that is coated with is 0.2～0.4mm, the black grid aspect (upper edged surface) of each triangular grating striped is perpendicular to base plan, angle between the black grid aspect of each adjacent triangular grating striped and reflection aspect (skew back face) increases successively from the bottom to top

in formula, α is the incident angle of ultrashort focus projector to screen projection image, and L is the grade numerical value of projection image height.

Above-mentioned black grid optics, by becoming in the ultrashort burnt front projection screen of reflection angle, joins and makes by least two width reflective membrane seams at the three layers of reflective membrane that arrange that bind above of substrate, and between adjacent two layers reflective membrane, the fissure of displacement binds.

Above-mentioned black grid optics is by becoming in the ultrashort burnt front projection screen of reflection angle, and on black grid layer, the grid line width of the triangular grating striped that is coated with is 0.3mm.

Compared with prior art, the utility model is just being thrown on display screen basis at traditional general type, the structure of triangular grating striped on black grid layer is changed to by varied angle by original fixed angle, in use along with the variation of projector's throw light angle, reflection ray also changes thereupon, throw light all can be penetrated by normal to screen, also make projection ray can enter to greatest extent human eye, and then improve the brightness and contrast of projected picture.

Accompanying drawing explanation

Fig. 1 is the structural representation of a specific embodiment of the utility model.

Fig. 2 is working state schematic representation of the present utility model.

Fig. 3 is fundamental diagram of the present utility model.

Fig. 4, Fig. 5 and Fig. 6 are respectively the enlarged drawing of I portion in Fig. 3, II portion and III portion.

In figure, each number designation title is respectively: 1-screen substrate, and 2-reflective membrane, the black grid layer of 3-, the black grid aspect of 31-, 32-reflects aspect, the ultrashort focus projector of 4-.

Embodiment

Referring to accompanying drawing, black grid optics described in the utility model is made up of screen substrate 1, reflective membrane 2 and black grid layer 3 by becoming the ultrashort burnt front projection screen of reflection angle.Three layers of reflective membrane 2 bind be arranged on substrate 1 before, black grid layer 3 pressure viscosity are on anterior layer reflective membrane.Face at black grid layer 3 the fine triangular grating striped of black that is coated with multiple tracks marshalling on spectators' outside surface, the grid line width of triangular grating striped is 0.3mm, the black grid aspect 31 of each triangular grating striped is perpendicular to base plan, and the angle between black grid aspect 31 and the reflection aspect 32 of each adjacent triangular grating striped increases successively from the bottom to top when work, along with the variation of ultrashort focus projector 4 throw light angles, reflection ray also changes thereupon, makes throw light to enter to greatest extent human eye, to improve the brightness and contrast of projected picture.Concrete enforcement in structure, for obtaining high brightness uniformity, the utility model adopts three layers of reflective membrane bond techniques, every layer of reflective membrane is greater than the wide reflective membrane seam of 900mm by least two width and joins and form, between every layer of reflective membrane, the fissure of displacement binds, and three layers of reflective membrane fissure of displacement bind and can change diffuser efficiency, eliminate solar effect, improve screen homogeneity, also can eliminate piece vestige.

Claims

1. a black grid optics is by becoming the ultrashort burnt front projection screen of reflection angle, it is characterized in that: there is a screen substrate of being made by polymer composite (1), binding and being provided with three layers of reflective membrane (2) above in screen substrate (1), there is one deck to be coated with side by side the black grid layer (3) of the fine triangular grating striped of multiple tracks black on it in the pressure viscosity above of anterior layer reflective membrane (2), on black grid layer (3), the grid line width of the triangular grating striped that is coated with is 0.2～0.4mm, the black grid aspect (31) of each triangular grating striped is perpendicular to base plan, angle between black grid aspect (31) and the reflection aspect (32) of each adjacent triangular grating striped increases successively from the bottom to top

in formula, α is the incident angle of ultrashort focus projector (4) to screen projection image, and L is the grade numerical value of projection image height.

2. black grid optics according to claim 1 is by becoming the ultrashort burnt front projection screen of reflection angle, it is characterized in that: the three layers of reflective membrane (2) that arrange that bind above at substrate (1) join and make by least two width reflective membrane seams, and between adjacent two layers reflective membrane (2), the fissure of displacement binds.

3. black grid optics according to claim 1, by becoming the ultrashort burnt front projection screen of reflection angle, is characterized in that: on black grid layer (3), the grid line width of the triangular grating striped that is coated with is 0.3mm.