CN101545607A - Backlight module for flat panel display - Google Patents
Backlight module for flat panel display Download PDFInfo
- Publication number
- CN101545607A CN101545607A CN200810087220A CN200810087220A CN101545607A CN 101545607 A CN101545607 A CN 101545607A CN 200810087220 A CN200810087220 A CN 200810087220A CN 200810087220 A CN200810087220 A CN 200810087220A CN 101545607 A CN101545607 A CN 101545607A
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- rete
- backlight module
- light source
- dimpling shape
- dimpling
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Abstract
The invention discloses a backlight module for a flat panel display, which is arranged under a display panel and adjacent to a polarizer positioned on the lower surface of the display panel. The backlight module comprises a light source module and an optical film, wherein the optical film is arranged above the light source module, and is formed by laminating a lower film layer and an upper film layer; the upper film layer is adjacent to the polarizer, and a plurality of first micro convex structures are formed on the upper surface of the upper film layer; a plurality of second micro convex structures with different heights are formed on the upper surface of the lower film layer; and the higher second micro convex structures support the upper film layer so as to form gaps with different widths between the upper film layer and the lower film layer.
Description
Technical field
The present invention relates to a kind of backlight module of flat-panel screens, especially relate to the blooming piece configuration of backlight module.
Background technology
Lcd technology is a kind of passive display technique.LCD must have a backlight, provides display panels to show required illumination, picture can be presented.Generally speaking, in order to promote the picture brightness and the uniformity, the light that backlight provided also requires the uniformity of illumination simultaneously except possessing sufficient briliancy.
Fig. 1 is the schematic diagram of the optical diaphragm structure 100 of a typical backlight module.As shown in FIG., optical diaphragm structure 100 places the top of optical plate 120, and this optical diaphragm structure 100 from bottom to top has diffusion sheet 140, a brightening piece (brightness enhance film, BEF) diffusion sheet 180 on 160 and in regular turn.Wherein, the upper surface of following diffusion sheet 140 is scattered with light convergence structure 142, in order to will be from the light of the optical plate 120 normal direction deviation towards optical diaphragm structure 100, to improve the brightness of illumination.The surface of brightening piece 160 is manufactured with water chestnut mirror structure 162, in order to promote the briliancy of light along normal direction.The upper surface of last diffusion sheet 180 is scattered with light homogeneous texture 182, in order to improve the uniformity of illumination.In addition, owing to be exactly display panels (not shown) above this optical diaphragm structure 100, the existence of last diffusion sheet 180 can avoid brightening piece 160 sharp-pointed water chestnut mirror structure 162 scratches in surface to be positioned at the polarizer of display panels below.
But, this optical diaphragm structure 100 needs down diffusion sheet 140, brightening piece 160 altogether and goes up three blooming pieces such as diffusion sheet 180 to reach evenly purpose backlight is provided, and causes the cost of manufacture of backlight module to be difficult to descend.Hence being, how reducing employed blooming piece number, can reach identical illumination effect again, is the problem that solution is desired most ardently in the present technique field.
Summary of the invention
Main purpose of the present invention is to reduce the blooming piece of the required use of backlight module of flat-panel screens, to reduce its cost of manufacture.
Other purposes of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.
For reaching one of above-mentioned or partly or entirely purpose or other purposes, a kind of backlight module that one embodiment of the invention provide is arranged at display floater below, and a polarizer (polarizer) of contiguous display floater lower surface.This backlight module comprises a light source module and a blooming piece.Wherein blooming piece is arranged at the top of light source module.This blooming piece is made of rete pressing on the rete and once.The contiguous polarizer of last rete, and the upper surface of last rete is formed with a plurality of first dimpling shape structures.The upper surface of following rete is formed with a plurality of second dimpling shape structures with differing heights, and the height the higher person in those second dimpling shape structures supports goes up rete, makes and forms the space that a width differs between rete and the following rete.
For reaching one of above-mentioned or partly or entirely purpose or other purposes, the preparation method of a kind of backlight module that one embodiment of the invention provide comprises: a light source module is provided; Rete on one is provided, and upper surface of rete is formed with a plurality of first dimpling shape structures on this, and lower surface of rete is a smooth surface on this; Rete once is provided, and upper surface of rete is formed with a plurality of second dimpling shape structures with differing heights under this; To go up rete and be pressed on down on the rete, forming a blooming piece, and go up the space that formation one width differs between rete and the following rete.And this blooming piece is arranged at light source module top.
Be compared to existing optical diaphragm structure and need descend diffusion sheet, brightening piece and go up diffusion sheet to reach evenly purpose backlight is provided, and cause the cost of manufacture of backlight module to be difficult to descend.Backlight module of the present invention only needs a slice blooming piece can provide evenly and has the backlight of abundant briliancy.Therefore, can reduce cost of manufacture.
Description of drawings
Fig. 1 is the schematic diagram of the optical film structure of a typical backlight module;
Fig. 2 is the generalized section of the flat-panel screens of a preferred embodiment of the present invention;
Fig. 3 is the generalized section of the flat-panel screens of another preferred embodiment of the present invention;
Fig. 4 A and Fig. 4 B are the schematic diagrames of a preferred embodiment of the blooming piece among Fig. 2;
Fig. 4 C is the enlarged diagram of the last rete of the blooming piece among Fig. 4 B;
Fig. 5 is the schematic diagram of last rete of the blooming piece of another preferred embodiment of the present invention;
Fig. 6 is the schematic diagram of last rete of the blooming piece of the another preferred embodiment of the present invention; And
Fig. 7 A to Fig. 7 D is the schematic diagram of the backlight module preparation method of a preferred embodiment of the present invention.
The main element symbol description
Optical diaphragm structure 100
Optical plate 120
Following diffusion sheet 140
Brightening piece 160
Last diffusion sheet 180
Light convergence structure 142
Water chestnut mirror structure 162
Light homogeneous texture 182
Polarizer 220
Light source module 390,490
Light source 340,440
Following rete 362
The second dimpling shape structure 362a
The first dimpling shape structure 364a, 364b
Depression 364c
Projection 364d
The specific embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of a following cooperation preferred embodiment with reference to the accompanying drawings, can clearly present.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are the directions with reference to attached drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the present invention.
Fig. 2 is the generalized section of the flat-panel screens of a preferred embodiment of the present invention.As shown in FIG., this flat-panel screens has a display floater 200 and a backlight module 300.Backlight module 300 is arranged at display floater 200 belows, and a contiguous polarizer (polarizer) 220 that is positioned at display floater 200 lower surfaces.Backlight module 300 can produce planar light, is projected to display floater 200 to present picture.
Please in the lump with reference to Fig. 4 A and Fig. 4 B, the blooming piece 360 of one embodiment of the invention is made of rete 364 pressings on the rete 362 and once.The upper surface of following rete 362 is formed with a plurality of second dimpling shape structure 362a with differing heights, in order to will be from the light of the optical plate 320 of the light source module 390 normal direction deviation towards blooming piece 360.For instance, rete 362 can be a typical diffusion sheet under this.The upper surface of last rete 364 is formed with a plurality of first dimpling shape structure 364a, to promote the briliancy of light.For instance, rete 364 can be the optical film of a folk prescription to convergence on this.Secondly, be positioned at the polarizer 220 of its top for fear of last rete 364 scratches, with regard to a preferred embodiment, rete 364 can be a soft rete on this.
Shown in Fig. 4 C, in the present embodiment, the first dimpling shape structure 364a of last rete 364 upper surfaces is water chestnut mirror structures that top end is manufactured with flexure plane.364a is except promoting the briliancy of light along normal direction for this first dimpling shape structure, can also avoid scratch to be positioned at the polarizer of blooming piece 360 tops.But, the present invention is not limited to this, and as shown in Figure 5, the first dimpling shape structure 364b also can be that the surface presents circular-arc microlens structure.Again, as shown in Figure 6, the surface of this first dimpling shape structure 364a can additionally make a plurality of trickle depression 364c or protruding 364d, to promote the uniformity of illumination.
Shown in Fig. 4 A and Fig. 4 B, in the present embodiment, each second dimpling shape structure 362a is convex dot shape, and these second dimpling shape structure 362a random distribution (random) form in down the upper surface of rete 362.In addition, the height of these second dimpling shape structures 362a also is a random distribution.Height the higher person of these second dimpling shape structures 362a supports goes up rete 364, makes and forms the space that a width differs between rete 364 and the following rete 364.Because light beam enters rete 364 from the space is to enter close medium by thin medium, so light beam can be restrained.The first dimpling shape structure 364a of rete 364 upper surfaces in the collocation, 364b more can make light beam depend on Gansu Province to produce luminance gain toward normal direction.In addition, the second dimpling shape structure 362a of the present invention is not limited to be convex dot shape, also is not limited to adopt the upper surface that random distribution (random) forms in down rete 362.These second dimpling shape structures 362a also can be at certain intervals or is formed in down the upper surface of rete 362 with arrayed, and this second dimpling shape structure 362a also can be cylindric or other shapes.
Please refer to shown in Fig. 7 A to Fig. 7 D, is the schematic diagram of preparation method of the backlight module 300 of a preferred embodiment of the present invention.Shown in Fig. 7 A, at first provide a light source module 390.Particularly, provide an optical plate 320 in the present embodiment, and a light source 340 is set is adjacent to optical plate 320.Then, shown in Fig. 7 B, provide on one rete 364 and rete 362 once.Upper surface of rete 364 is formed with a plurality of first dimpling shape structure 364a on this, and the lower surface of last rete 364 is smooth surfaces.Upper surface of rete 362 is formed with a plurality of second dimpling shape structure 362a with differing heights under this.Next, shown in Fig. 7 C, will go up rete 364 and be pressed on down on the rete 362, to form a blooming piece 360.Simultaneously, form the space that a width differs between last rete 364 and the following rete 362.With regard to a preferred embodiment, can use hot melting way will go up rete 364 and press together with following rete 362.Subsequently, shown in Fig. 7 D, again this blooming piece 360 is arranged at light source module 390 tops, to finish this backlight module 300.In the present embodiment, optical module 390 has an optical plate 320 and a light source 340.This step is optical plate 320 tops that blooming piece 360 are arranged at light source module 390.
Be compared to Fig. 1, existing optical diaphragm structure 100 needs down diffusion sheet 140, brightening piece 160 altogether and goes up three blooming pieces such as diffusion sheet 180 to reach evenly purpose backlight is provided, and causes the cost of manufacture of backlight module to be difficult to descend.Backlight module 300 in an embodiment of the present invention only needs a slice blooming piece 360 can provide evenly and has the backlight of abundant briliancy.And the upper surface of this blooming piece 360 does not have sharp keen wedge angle, can scratch be positioned at the polarizer 220 of below of its display floater 200, and the setting that can omit diffusion sheet 180.Therefore, backlight module 300 can effectively reduce needed blooming piece quantity, reduces cost of manufacture.
The above person, it only is preferred embodiment of the present invention, when not limiting scope of the invention process with this, promptly the simple equivalent of being done according to claim of the present invention and invention description content generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.Arbitrary embodiment of the present invention in addition or claim must not reached the disclosed whole purposes of the present invention or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting interest field of the present invention.
Claims (19)
1. a backlight module is arranged at display floater below, and a contiguous polarizer (polarizer) that is positioned at this display floater lower surface, and this backlight module comprises:
Light source module is in order to provide a light; And
Blooming piece, be arranged at the top of this light source module, this blooming piece is made of rete pressing on the rete and once, should go up contiguous this polarizer of rete, and the upper surface that should go up rete is formed with a plurality of first dimpling shape structures, the upper surface of this time rete is formed with a plurality of second dimpling shape structures with differing heights, and the height the higher person in those second dimpling shape structures supports should go up rete, to form the space that a width differs between rete on this and this time rete.
2. backlight module as claimed in claim 1, wherein, rete and this time rete combine with hot melting way on this.
3. backlight module as claimed in claim 1, wherein, this first dimpling shape structure is the water chestnut mirror structure that the top forms flexure plane.
4. backlight module as claimed in claim 3, wherein, the surface of this first dimpling shape structure is formed with a plurality of raised or sunken, to promote the uniformity of illumination.
5. backlight module as claimed in claim 1, wherein, this first dimpling shape structure is that a surface presents circular-arc microlens structure.
6. backlight module as claimed in claim 5, wherein, the surface of this first dimpling shape structure is formed with a plurality of raised or sunken, to promote the uniformity of illumination.
7. backlight module as claimed in claim 1, wherein, this second dimpling shape structure is column or convex dot shape.
8. backlight module as claimed in claim 1, wherein, this light source module has an optical plate and a light source, and this light source is arranged at the avris of this optical plate, and provides this ray cast to enter this optical plate.
9. backlight module as claimed in claim 1, wherein, this light source module has a diffuser plate and a light source, and this light source is arranged at the below of this diffuser plate, and provides this ray cast to enter this diffuser plate.
10. backlight module as claimed in claim 1, wherein, rete is the optical film of a folk prescription to convergence on this.
11. backlight module as claimed in claim 1, wherein, rete is a soft rete on this.
12. backlight module as claimed in claim 1, wherein, this time rete is a diffusion sheet.
13. a flat-panel screens comprises:
Display floater;
Polarizer (polarizer) is positioned at the lower surface of this display floater; And
Backlight module is arranged at the below of this display floater, and this backlight module comprises:
Light source module is in order to provide a light; And
Blooming piece, be arranged at the top of this light source module, this blooming piece is made of rete pressing on the rete and once, should go up contiguous this polarizer of rete, and the upper surface that should go up rete is formed with a plurality of first dimpling shape structures, the upper surface of this time rete is formed with a plurality of second dimpling shape structures with differing heights, and the height the higher person in those second dimpling shape structures supports should go up rete, to form the space that a width differs between rete on this and this time rete.
14. the preparation method of a backlight module comprises:
One light source module is provided;
Rete on one is provided, and upper surface of rete is formed with a plurality of first dimpling shape structures on this, and upward the lower surface of rete is a smooth surface;
Rete once is provided, and the upper surface of this time rete is formed with a plurality of second dimpling shape structures with differing heights;
Should go up rete and the pressing of this time rete, to form a blooming piece, wherein the height the higher person in those second dimpling shape structures supports and should go up rete, to form the space that a width differs between rete on this and this time rete; And
This blooming piece is arranged at this light source module top.
15. as the preparation method of the backlight module of claim 14, wherein, rete and this time rete are with the hot melting way pressing on this.
16. as the preparation method of the backlight module of claim 14, wherein, this first dimpling shape structure is the water chestnut mirror structure that the top forms flexure plane.
17. as the preparation method of the backlight module of claim 14, wherein, the surface of this first dimpling shape structure is formed with a plurality of raised or sunken, to promote the uniformity of illumination.
18. as the preparation method of the backlight module of claim 14, wherein, this first dimpling shape structure is that a surface presents circular-arc microlens structure.
19. as the preparation method of the backlight module of claim 14, wherein, this second dimpling shape structure is column or convex dot shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100872207A CN101545607B (en) | 2008-03-24 | 2008-03-24 | Backlight module for flat panel display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100872207A CN101545607B (en) | 2008-03-24 | 2008-03-24 | Backlight module for flat panel display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101545607A true CN101545607A (en) | 2009-09-30 |
| CN101545607B CN101545607B (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100872207A Expired - Fee Related CN101545607B (en) | 2008-03-24 | 2008-03-24 | Backlight module for flat panel display |
Country Status (1)
| Country | Link |
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| CN (1) | CN101545607B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062891A (en) * | 2010-11-01 | 2011-05-18 | 李明伟 | Composite bright enhancement film |
| CN103366643A (en) * | 2012-06-26 | 2013-10-23 | 友达光电股份有限公司 | Display device and combined display system |
| CN106814504A (en) * | 2015-11-30 | 2017-06-09 | 乐金显示有限公司 | Optical film and its manufacture method and liquid crystal display |
| CN108327376A (en) * | 2018-01-18 | 2018-07-27 | 苏州三鑫时代新材料股份有限公司 | The preparation method and its equipment of a kind of compound brightening film sheet or light diffusing sheet |
| CN114973968A (en) * | 2022-06-22 | 2022-08-30 | 武汉天马微电子有限公司 | Display module and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437153C (en) * | 2006-05-25 | 2008-11-26 | 友达光电股份有限公司 | Backlight module and diffusion module therefor |
-
2008
- 2008-03-24 CN CN2008100872207A patent/CN101545607B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062891A (en) * | 2010-11-01 | 2011-05-18 | 李明伟 | Composite bright enhancement film |
| CN102062891B (en) * | 2010-11-01 | 2012-05-23 | 李明伟 | Composite bright enhancement film |
| CN103366643A (en) * | 2012-06-26 | 2013-10-23 | 友达光电股份有限公司 | Display device and combined display system |
| CN106814504A (en) * | 2015-11-30 | 2017-06-09 | 乐金显示有限公司 | Optical film and its manufacture method and liquid crystal display |
| CN108327376A (en) * | 2018-01-18 | 2018-07-27 | 苏州三鑫时代新材料股份有限公司 | The preparation method and its equipment of a kind of compound brightening film sheet or light diffusing sheet |
| CN114973968A (en) * | 2022-06-22 | 2022-08-30 | 武汉天马微电子有限公司 | Display module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101545607B (en) | 2011-03-16 |
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Granted publication date: 20110316 Termination date: 20130324 |