CN2552013Y - Light diffusion plate - Google Patents
Light diffusion plate Download PDFInfo
- Publication number
- CN2552013Y CN2552013Y CN02234571U CN02234571U CN2552013Y CN 2552013 Y CN2552013 Y CN 2552013Y CN 02234571 U CN02234571 U CN 02234571U CN 02234571 U CN02234571 U CN 02234571U CN 2552013 Y CN2552013 Y CN 2552013Y
- Authority
- CN
- China
- Prior art keywords
- diffusing sheet
- light diffusing
- light
- template
- space pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Abstract
The utility model discloses a light diffusion plate used in a back projection screen which is matched with a projection ray, wherein, one surface of the light diffusion plate is provided with a plurality of evenly distributed solid patterns so as to ensure that the projection ray can be evenly diffused when emitting to the solid patterns.
Description
Technical field
The utility model relates to a kind of light diffusing sheet that is used for rear projection screen, relates in particular to a kind of light diffusing sheet that is provided with a plurality of even distribution space patterns.
Background technology
Along with science and technology is progressive increasingly, rear projection screen (Rear Projection Screen) applies to back projection TV display screen (Rear Projection TV), terminal screen (Monitor Screen) or multimedia show curtain (Multi-screen installation) etc. widely recently.
Rear projection screen is that the image in the projector is launched, and passes the eyes that display screen enters spectators, its with large scale, high image quality, and frivolous be its characteristics.Rear projection screen mainly comprises a Fresnel lens (Fresnel lens), reaches a light diffusing sheet (diffusion plate).The divergent rays that Fresnel lens is launched in order to collimation even convergence projector is to increase the brightness of image.Light diffusing sheet then is provided as picture, and makes projection ray remake diffusion, makes any position of spectators in the ken can both know the projection ray that sees full screen.
The principal ingredient of known light diffusing sheet includes methyl methacrylate (Methacrylateester, MMA), azo two isobutyls fine (Azobisisobutyronitrile, AIBN), diffusion powder (diffusion powder), and dyestuff (tint) etc.Diffusion powder system is with as SiO
2, TiO
2, and Al
2O
3In the tiny powder of particle diameter, be added to mix in the resin of melting attitude and stir.After stirring, the diffusion material of melting attitude is solidified to form light diffusing sheet with thermal treatment injection molding (Thermal Process Casting) or ultraviolet curing method (UV-curing).The fundamental purpose of diffusion powder is when projection ray being beaten be incident upon the diffusion powder, and the diffusion powder can disperse projection ray, to realize the effect of light diffusion.
Make light can utilize the diffusion powder to spread equably, most important is that the diffusion powder is distributed in the light diffusing sheet equably.Yet, because the diffusion powder is very tiny, though therefore the diffusion powder in the resin of melting attitude through stirring fully, remain the phenomenon that very is easy to generate nodule.In addition, in the process of hardening of resin, because the effect of gravity, the diffusion powder also can produce the phenomenon of precipitation.Therefore, when light diffusing sheet passes in projection ray,,, and need to improve the brightness of photo engine so that light diffusion uniformity coefficient is not good because the diffusion powder is not to be distributed in the light diffusing sheet equably.
Therefore, how solving projection ray and spread uneven problem, is an important problem in fact.
The utility model content
Because above-mentioned problem, the purpose of this utility model is to provide a kind of light to spread uniform light diffusing sheet.
For achieving the above object, the utility model provides a kind of light diffusing sheet, is used for a rear projection screen, and this rear projection screen cooperates a projection ray.Wherein, a surface of light diffusing sheet is provided with a plurality of equally distributed space patterns, and when making projection ray beat to be incident upon these space patterns, projection ray can spread equably.In an embodiment of the present utility model, be formed at the lip-deep space pattern of light diffusing sheet and can be cambered surface at the equally distributed evagination in this light diffusing sheet surface.
Because light diffusing sheet of the present utility model, form space pattern in its surface, these space pattern systems can impress mode (pressing), mold (casting) or injection molding mode and form, so space pattern is uniformly distributed on the light diffusing sheet.Utilization is formed at the space pattern on the light diffusing sheet, replaces the diffusion powder that is mixed in the light diffusing sheet, to solve diffusion powder problem pockety, realizes the evenly purpose of diffusion of projection ray.
Description of drawings
Figure 1A is the stereographic map of first template of formation the utility model light diffusing sheet.
Figure 1B is the top view of first template of formation the utility model light diffusing sheet.
The sectional view of Fig. 1 C for being cut along the A-A profile line of Figure 1B.。
Fig. 2 is another pattern of first template of formation the utility model light diffusing sheet.
Fig. 3 is the state of coating light binding on first template.
Fig. 4 is with the state of a rolling wheel roll extrusion on second template.
Fig. 5 is for solidifying light binding to form a light diffusing sheet with ultraviolet light.
Fig. 6 separates the light diffusing sheet of first template and the second template gained for after light binding solidifies.
Fig. 7 A is the stereographic map of light diffusing sheet of the present utility model.
Fig. 7 B is the top view of light diffusing sheet of the present utility model.
The sectional view of Fig. 7 C for being cut along the B-B profile line of Fig. 7 B.
Embodiment
Below with reference to relevant drawings, the light diffusing sheet of the utility model preferred embodiment is described.
Light diffusing sheet of the present utility model is used for a rear projection screen, and this rear projection screen is matched with a projection ray.One surface of this light diffusing sheet is provided with a plurality of equally distributed space patterns, and this space pattern can form with impression mode, injection molding mode.Below form the light diffusing sheet that the surface has space pattern in the mode of template impression.
Please refer to Figure 1A, Figure 1B, and Fig. 1 C shown in first template 1, the sectional view cut along the A-A line of Figure 1B of Fig. 1 C wherein.It is made that first template 1 can be aluminium, nickel or copper, and its surface equally distributed space pattern that is arranged with is the cambered surface of indent.About 0.0025mm～the 0.05mm of the radius-of-curvature of cambered surface, and the spacing between two cambered surfaces can be about between 0.01mm～0.2mm scope.In addition, these space patterns are distributed on the surface of first template equably with the kenel of array.Certainly, the space pattern of first template, 1 surface setting also can be square body, rectangular parallelepiped or the polyhedron etc. of indent.First template 1 ' for example shown in Figure 2, its surface be for being arranged with equally distributed polyhedron, and space pattern of each distribution has equal size, and distribute with the equidistance array.
As shown in Figure 3, some colloid system 2 with the coating kenel of ㄇ font inject contain dyestuff light binding 21 on first template 1, wherein light binding 21 can be the ultraviolet light photopolymerization resin.It is noted that, before carrying out a glue program, must eliminate static on first template 1 with electrostatic gun or electrostatic rod.
As shown in Figure 4, after light binding 21 coatings finish, cover one second template 3 on first template 1 that scribbles light binding 21.Second template 3 can be polymethylmethacrylate acrylic plate (PMMA), dibasic alcohol upgrading polyester sheet (PETG) or polycarbonate plate (PC) etc., and its thickness is between 0.1mm～3mm.Similarly, before second template 3 covers on first template 1, also must eliminate the static on surface with electrostatic gun or electrostatic rod.Second template 3 must gently be covered on first template 1 by the angle of inclination of axis servomotor (not shown) with 20 °～45 °, and with rolling wheel 5 (Roller) roll extrusion so that light binding 21 is launched, and eliminate simultaneously in the light binding 21 bubble.
As shown in Figure 5, with first template 1, light binding 21, and second template 3 with ultraviolet light (ultraviolet light) irradiation, so that light binding 21 is solidified into light diffusion layer 21 '.As shown in Figure 6, utilize stripping machine that first template 1 is separated with light diffusion layer 21 ', to get light diffusing sheet 4.Be noted that in the present embodiment, light diffusing sheet 4 is made of the light diffusion layer 21 ' and second template 3.
As Fig. 7 A, Fig. 7 B, and Fig. 7 C shown in light diffusing sheet 4, its surface forms cambered surface of the evagination of even distribution equal sizes.Wherein, Fig. 7 C is the sectional view of being cut along the B-B line of Fig. 7 B.Be noted that the space pattern that is convexly equipped with or is arranged with on light diffusing sheet 4 surfaces also can the side's of being body, rectangular parallelepiped or polyhedron etc., can utilize the figure of first template 1 to reprint.
In sum, because light diffusing sheet of the present utility model one surface is provided with equally distributed space pattern, and forms in modes such as impression or injection moldings, distribute equably so can guarantee these space patterns.Therefore, beat when being incident upon light diffusing sheet, utilize these space patterns that light is spread equably,, also can reduce the required brightness of photo engine simultaneously to improve the uniformity coefficient of projection ray's diffusion significantly when projection ray.
The specific embodiment that is proposed in the detailed description of present embodiment is only in order to be easy to illustrate technology contents of the present utility model, and be not with the utility model narrow sense be limited to this embodiment, for example, these space patterns also can point-symmetric mode be uniformly distributed on the surface of light diffusing sheet, under the situation that does not exceed spirit of the present utility model and claim scope, can make many variations and implement.
Claims (10)
1. a light diffusing sheet is used for a rear projection screen, and this rear projection screen is matched with a projection ray, it is characterized in that:
One surface of this light diffusing sheet is provided with a plurality of equally distributed space patterns.
2. light diffusing sheet as claimed in claim 1 is characterized in that: this space pattern is the cambered surface of evagination.
3. light diffusing sheet as claimed in claim 1 is characterized in that: this space pattern is the cambered surface of indent.
4. light diffusing sheet as claimed in claim 1 is characterized in that: this space pattern is the polyhedron of evagination.
5. light diffusing sheet as claimed in claim 1 is characterized in that: this space pattern is the polyhedron of indent.
6. a rear projection screen is matched with a projection ray, comprises:
One Fresnel lens, it is in order to collimate this projection ray; And
It is characterized in that: a light diffusing sheet, be equipped on a side of this Fresnel lens, a surface of this light diffusing sheet is provided with a plurality of equally distributed space patterns.
7. rear projection screen as claimed in claim 6 is characterized in that: this space pattern is the cambered surface of evagination.
8. rear projection screen as claimed in claim 6 is characterized in that: this space pattern is the cambered surface of indent.
9. rear projection screen as claimed in claim 6 is characterized in that: this space pattern is the polyhedron of evagination.
10. rear projection screen as claimed in claim 6 is characterized in that: this space pattern is the polyhedron of indent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02234571U CN2552013Y (en) | 2002-05-14 | 2002-05-14 | Light diffusion plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02234571U CN2552013Y (en) | 2002-05-14 | 2002-05-14 | Light diffusion plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2552013Y true CN2552013Y (en) | 2003-05-21 |
Family
ID=33709317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02234571U Expired - Fee Related CN2552013Y (en) | 2002-05-14 | 2002-05-14 | Light diffusion plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2552013Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1860384B (en) * | 2003-11-28 | 2010-05-26 | 大日本印刷株式会社 | Light diffusion sheet |
| CN105759327A (en) * | 2016-04-21 | 2016-07-13 | Tcl海外电子（惠州）有限公司 | Diffusion plate, diffusion plate manufacturing method, backlight module and display apparatus |
| CN107290810A (en) * | 2017-08-11 | 2017-10-24 | 太仓碧奇新材料研发有限公司 | The preparation method of nanometer grating structure composite blue light diffusion barrier |
-
2002
- 2002-05-14 CN CN02234571U patent/CN2552013Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1860384B (en) * | 2003-11-28 | 2010-05-26 | 大日本印刷株式会社 | Light diffusion sheet |
| CN105759327A (en) * | 2016-04-21 | 2016-07-13 | Tcl海外电子（惠州）有限公司 | Diffusion plate, diffusion plate manufacturing method, backlight module and display apparatus |
| CN107290810A (en) * | 2017-08-11 | 2017-10-24 | 太仓碧奇新材料研发有限公司 | The preparation method of nanometer grating structure composite blue light diffusion barrier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101354454B (en) | Anti-glare film, method for manufacturing the same, and display device using the same | |
| WO2005083510A1 (en) | Light diffusing screen | |
| CN101310213B (en) | Light diffusion plate for liquid crystal display | |
| KR20010072208A (en) | Lens sheet and method for producing the same | |
| CN1483156A (en) | Microstructured rear projection screen | |
| JP2000280267A (en) | Production of light diffusing body | |
| JP2009109683A (en) | Antiglare and anti-newton film | |
| EP1852719B1 (en) | Method of designing a diffusion film, process for producing the same and a diffusion film obtained thereby | |
| EP0381417B1 (en) | Rear projection screen and method of manufacturing the same | |
| CN101169496A (en) | Method for manufacturing composite film | |
| CN103389531A (en) | Reflecting film manufacturing method and backlight module | |
| CN2552013Y (en) | Light diffusion plate | |
| CN103116199A (en) | Prism sheet and backlight unit using the same | |
| CN106353883B (en) | Mangneto light control material, local backlight adjusting film, backlight module and display equipment | |
| JP2010128447A (en) | Optical sheet, method of manufacturing the same, lighting device, projector, signboard and image display device | |
| CN101595404A (en) | Optical composite and manufacture method thereof | |
| CN100353187C (en) | Antiglare film | |
| JPH01159627A (en) | Production of screen | |
| CN103694774A (en) | Method for making UV noctilucent paster with high brightness | |
| JPS58186732A (en) | Transmission screen | |
| JP2009109556A (en) | Optical sheet | |
| CN101634774B (en) | Optical diaphragm of backlight unit, manufacturing method thereof and manufacturing device thereof | |
| JP2000180968A (en) | Transmission type projection screen | |
| JP2010128430A (en) | Optical sheet, method of manufacturing optical sheet, lighting device, projector, signboard and image display device | |
| CN205665498U (en) | Laterally -incoming -type backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030521 |