CN101571647A - Backlight module and liquid crystal display (LCD) using same - Google Patents
Backlight module and liquid crystal display (LCD) using same Download PDFInfo
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- CN101571647A CN101571647A CNA2008100955568A CN200810095556A CN101571647A CN 101571647 A CN101571647 A CN 101571647A CN A2008100955568 A CNA2008100955568 A CN A2008100955568A CN 200810095556 A CN200810095556 A CN 200810095556A CN 101571647 A CN101571647 A CN 101571647A
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- prism
- curve
- blooming piece
- backlight module
- lcd
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Abstract
The invention provides a backlight module and a liquid crystal display (LCD) using the same. The LCD comprises a light source, at least one optical diaphragm and a display panel, wherein one surface of the optical diaphragm comprises at least one prism structure. A plurality of prism arrangement positions on the prism structure are respectively provided with a plurality of triangular prisms, and one bottom corner of every triangular prism is determined by the prism arrangement positions of the triangular prisms corresponding to the curve gradient of a curved line and is far away from one center line of the section of the prism structure in the two contacted bottom corners of the triangular prisms and the optical diaphragm; in addition, the light source is arranged at one side of the optical diaphragm along the center line, and light rays radiated by the light source directly irradiate on the optical diaphragm.
Description
Technical field
The present invention relates to a kind of backlight module, particularly relate to a kind of backlight module of the blooming piece with prism structure and use the LCD of this backlight module.
Background technology
Backlight module is one of key part and component of flat display apparatus product such as LCD, is used to provide the stable and light source uniformly of display.Generally speaking, backlight module includes light source, light guide plate, diffuser plate (diffusion sheet) and several blooming pieces or prismatic lens (prism sheet), wherein the light that light source sent via light guide plate with light scatter (scatter) to display panel, be used for light is evenly disperseed through diffuser plate more afterwards, increase the concentration degree of light and improve brightness of backlight module via blooming piece or prismatic lens more at last.Yet light is through diffuser plate the time, and the energy of light has loss, so tend to cause the decline on the backlight module brightness.
Summary of the invention
The object of the present invention is to provide a kind of backlight module of the blooming piece with prism structure and use the LCD of this backlight module, make this backlight module need not use diffuser plate also can reach the purpose of light uniformization.
According to embodiments of the invention, it discloses a kind of backlight module.This backlight module includes a light source and at least one blooming piece.Include at least one prism structure on one surface of this blooming piece, and a plurality of prisms are provided with the position a plurality of triangular prisms are set respectively on this prism structure, one base angle of each triangular prism is provided with the rate of curve that the position corresponds to a curve by the prism of this triangular prism and is determined, and the center line base angle far away of the section of two base angle these prism structures of middle distance of being contacted with this blooming piece for this triangular prism of this base angle; In addition, this light source is located at a side of this blooming piece along this center line.
According to embodiments of the invention, it discloses a kind of LCD in addition, and this LCD includes a light source, at least one blooming piece and a display panel.Include at least one prism structure on one surface of this blooming piece, and a plurality of prisms are provided with the position a plurality of triangular prisms are set respectively on this prism structure, one base angle of each triangular prism is provided with the rate of curve that the position corresponds to a curve by the prism of this triangular prism and is determined, and the center line base angle far away of the section of two base angle these prism structures of middle distance of being contacted with this blooming piece for this triangular prism of this base angle; Wherein the light direct irradiation dispersed of this light source is to this blooming piece; In addition, this light source is located at a side of this blooming piece along this center line, and wherein the light direct irradiation dispersed of this light source is to this blooming piece.
Therefore, using backlight module of the present invention can be under the situation of not using diffuser plate, the target of utilizing blooming piece of the present invention to reach light uniformization and increase the light concentration degree.
Description of drawings
Fig. 1 is the side view of the backlight module of one embodiment of the invention;
Fig. 2 is the synoptic diagram of prism structure of blooming piece of the present invention and preparation method thereof;
Fig. 3 A-Fig. 3 C determines the synoptic diagram at another base angle of triangular prism for when prism structure during towards light source;
Fig. 4 A-Fig. 4 B determines the synoptic diagram at another base angle of triangular prism for when the prism structure backlight;
Fig. 5 is when light source is a line source, the synoptic diagram of blooming piece and line source relative position;
Fig. 6 is when light source is a pointolite, the synoptic diagram of blooming piece and pointolite relative position.
The main element symbol description
| 100 | |
| 110 | |
| 120 | |
| 122 | |
| 210 | Curve |
| 510 | |
| 610 | Pointolite |
Embodiment
Please refer to Fig. 1, Fig. 1 is the side view of the backlight module 100 of one embodiment of the invention.As shown in Figure 1, backlight module 100 includes a plurality of light sources 110 and a blooming piece 120, wherein blooming piece 120 includes the surface that is made in blooming piece 120 and corresponding to a plurality of prism structures 122 of a plurality of light sources 110, in addition, each prism structure 122 is made up of a plurality of triangular prisms with different base angles, and these a plurality of triangular prisms are symmetrical in the center line of prism structure 122, moreover, each light source 110 is located at a side of blooming piece 120 along the center line of prism structure 122, and is positioned on the center line of corresponding prism structure 122.
Please refer to Fig. 2, Fig. 2 is the prism structure 122 of blooming piece 120 of the present invention and the synoptic diagram of its related production thereof.As shown in Figure 2, at first, decide a curve 210 according to the pattern of light source 110 and the distance of blooming piece 120 and light source 110, wherein the pattern of light source 100 is meant the dispersion angle ψ of the kind of light source and light source as shown in Figure 1, and the distance of blooming piece 120 and light source 110 as shown in Figure 1 apart from d, in addition, curve 210 is symmetrical in the center line of prism structure 122, in addition, these a plurality of prisms are provided with the coordinate of position on the section of the corresponding prism structure 122 of the x axes of coordinates of curve 210.The method for making of prism structure 122 is after decision curve 210, curve 210 is carried out a subdifferential a plurality of rate of curve of position are set, obtain being provided with corresponding to these a plurality of triangular prisms on the curve 210 tangent line of position again according to these a plurality of rate of curve with a plurality of triangular prisms on the section that obtains corresponding prism structure 122; At last, these a plurality of triangular prisms are provided with the position a plurality of triangular prisms are set respectively on a surface of blooming piece 120, wherein a base angle of each triangular prism equals to be provided with corresponding to the prism of this triangular prism on the curve 210 grazing angle of position, and this grazing angle is defined as a corresponding tangent line and the folded acute angle of x axes of coordinates on the curve 210.For instance, as shown in Figure 2, triangular prism TP
A, TP
B, TP
CThe position that is provided with correspond to A, B, C 3 points on the curve 210 respectively, and as shown in the figure, triangular prism TP
ABase angle θ
1Equal the grazing angle θ that the A on the curve 210 is ordered
1, triangular prism TP
BBase angle θ
2Equal the grazing angle θ that the B on the curve 210 is ordered
2And triangular prism TP
CBase angle θ
3Equal the grazing angle θ that the C on the curve 210 is ordered
3
At curve shown in Figure 2 210 is a continuous curve, yet according to the pattern of different light sources 110 and the distance of blooming piece 120 and light source 110, curve 210 can be combined by several curves, or is a discontinuous curve.
The base angle of above-mentioned triangular prism is decided according to the grazing angle of curve 210, wherein the base angle is the center line base angle far away of the section of the two base angle middle distance prism structures 122 that contacted with blooming piece 120 of triangular prism, then is whether the distance and the prism structure 122 of this triangular prism and light source 110 decides towards light source 110 as for another base angle of each triangular prism.Fig. 3 A-Fig. 3 C determines the synoptic diagram at another base angle of triangular prism for when prism structure 122 during towards light source 110.Shown in Fig. 3 A-Fig. 3 C, when the triangular prism on the prism structure 122 is positioned at apart from light source position far away, with triangular prism TP
A(Fig. 3 B comprises triangular prism TP among Fig. 3 A for example
AThe part-structure enlarged diagram), its another base angle
Design be used for making incident light through prism facets S
2Refraction and prism facets S
1Total reflection after, can vertically penetrate another surface of blooming piece; Yet, when the triangular prism on the prism structure 122 is positioned at apart from the nearer position of light source, with triangular prism TP
B(Fig. 3 C comprises triangular prism TP among Fig. 3 A for example
BThe part-structure enlarged diagram), its another base angle
Design be used for making most incident light only to pass through prism facets S
1, and incident light is via prism facets S
1Can vertically penetrate another surface of blooming piece after the refraction.
Yet when prism structure 122 backlight 110, just there is different deciding means at another base angle of triangular prism.Fig. 4 A and Fig. 4 B determine the synoptic diagram at another base angle of triangular prism for when prism structure 122 backlight 110.(Fig. 4 B comprises triangular prism TP among Fig. 4 A shown in Fig. 4 A and Fig. 4 B
DThe part-structure enlarged diagram), triangular prism TP
DAnother base angle
Design make incident light after refraction through another surface of blooming piece, only can touch prism facets S
1And can not touch prism facets S
2, incident light is via prism facets S afterwards
1Can vertically penetrate the surface of blooming piece after the refraction.
In addition, in existing prismatic lens, one surface of prismatic lens is a prism structure, another surface then is the transparent flat of high-penetration degree, yet, in an embodiment of the present invention, another surface of blooming piece 120 can or have a cloudy surface structure of diffusion effect for the transparent flat of penetration, uses cloudy surface structure can be so that incident light is through having light simultaneously and concentrate and the effect of light uniformization behind the blooming piece 120 on another surface of blooming piece 120.
In addition, the material of blooming piece 120 can be an auroral poles optical material, the pre-polarization of light can be reached the effect that increases panel luminance via the collocation polaroid again.
Moreover, according to the difference of the light source in the backlight module 110 on pattern, the usage quantity of blooming piece 120 and also can be different with respect to light source 110 putting positions.Fig. 5 is when light source is a line source 510, the synoptic diagram of blooming piece 120 and line source 510 relative positions.As shown in Figure 5, line source 510 is positioned at extending on the planar S S of center line of prism structure, and extends planar S S perpendicular to blooming piece 120.
Fig. 6 is when light source is a pointolite 610, the synoptic diagram of blooming piece 120 and pointolite 610 relative positions.As shown in Figure 6, corresponding a plurality of extension planar S S of this center line of two blooming piece 120_1 and 120_2
1, SS
2, SS
3Form a plurality of intersections, and extend planar S S
1, SS
2, SS
3All perpendicular to blooming piece 120_1 and 120_2, and pointolite 610 is positioned on these a plurality of intersections.
In addition, in the backlight module 100 of the embodiment of the invention, do not need to use diffusion sheet, that is the light of light source 110 meeting direct irradiation is to blooming piece of the present invention, yet, in other embodiments, backlight module 100 also can add a diffusion sheet with low atomizing structure with the uniformity coefficient of high light more.
As mentioned above, using backlight module of the present invention can be in the light uniformity coefficient that increases display panel on this LCD under the situation of not using diffusion sheet in a LCD, and the manufacturing cost of reduction display, in addition, do not use diffusion sheet can reduce the loss of light ray energy yet, and then increase the brightness that light is incident to display panel.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (20)
1. backlight module, it includes:
At least one blooming piece, on a surface, include at least one prism structure, and a plurality of prisms are provided with the position a plurality of triangular prisms are set respectively on this prism structure, one base angle of each triangular prism is provided with the rate of curve that the position corresponds to a curve by the prism of this triangular prism and is determined, and the center line base angle far away of the section of two base angle these prism structures of middle distance of being contacted with this blooming piece for this triangular prism of this base angle; And
One light source is located at a side of this blooming piece along this center line.
2. backlight module as claimed in claim 1, wherein another surface of this blooming piece comprises the cloudy surface structure with diffusion effect.
3. backlight module as claimed in claim 1, wherein an axes of coordinates of this curve is provided with the coordinate of position to these a plurality of prisms on should the section of prism structure, this base angle of each triangular prism equals to be provided with corresponding to the prism of this triangular prism on this curve the grazing angle of position, and this grazing angle is a corresponding tangent line and the folded acute angle of this axes of coordinates that this curve limited.
4. backlight module as claimed in claim 1, wherein the material of this blooming piece is an auroral poles optical material.
5. backlight module as claimed in claim 1, wherein this curve is symmetrical in this center line of the section of this prism structure.
6. backlight module as claimed in claim 1, wherein this curve is included as a continuous curve or a discontinuous curve.
7. backlight module as claimed in claim 1, wherein this light source is a line source, is positioned at a position of extending on the plane of this center line of the section that is parallel to this prism structure.
8. backlight module as claimed in claim 7 wherein should extend the plane perpendicular to this blooming piece.
9. backlight module as claimed in claim 1, wherein the corresponding a plurality of extensions plane by this center line of two these blooming pieces forms a plurality of intersections, and this a plurality of extensions plane is all perpendicular to this blooming piece.
10. backlight module as claimed in claim 9, wherein this light source is a pointolite, is positioned on this intersection.
11. a LCD, it includes:
At least one blooming piece, on a surface, include at least one prism structure, and a plurality of prisms are provided with the position a plurality of triangular prisms are set respectively on this prism structure, one base angle of each triangular prism is provided with the rate of curve that the position corresponds to a curve by the prism of this triangular prism and is determined, and the center line base angle far away of the section of two base angle these prism structures of middle distance of being contacted with this blooming piece for this triangular prism of this base angle;
One light source is located at a side of this blooming piece along this center line; And
One display panel;
Wherein the light direct irradiation dispersed of this light source is to this blooming piece.
12. LCD as claimed in claim 11, wherein another surface of this blooming piece comprises the cloudy surface structure with diffusion effect.
13. LCD as claimed in claim 11, wherein an axes of coordinates of this curve is provided with the coordinate of position to these a plurality of prisms on should the section of prism structure, this base angle of each triangular prism equals to be provided with corresponding to the prism of this triangular prism on this curve the grazing angle of position, and this grazing angle is a corresponding tangent line and the folded acute angle of this axes of coordinates that this curve limited.
14. LCD as claimed in claim 11, wherein the material of this blooming piece is an auroral poles optical material.
15. LCD as claimed in claim 11, wherein this curve is symmetrical in this center line of the section of this prism structure.
16. LCD as claimed in claim 11, wherein this curve is included as a continuous curve or a discontinuous curve.
17. LCD as claimed in claim 11, wherein this light source is a line source, is positioned at a position of extending on the plane of this center line of the section that is parallel to this prism structure.
18. LCD as claimed in claim 17 wherein should be extended the plane perpendicular to this blooming piece.
19. LCD as claimed in claim 11, wherein the corresponding a plurality of extensions plane by this center line of two these blooming pieces forms a plurality of intersections, and this a plurality of extensions plane is all perpendicular to this blooming piece.
20. LCD as claimed in claim 19, wherein this light source is a pointolite, is positioned on this intersection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100955568A CN101571647A (en) | 2008-04-29 | 2008-04-29 | Backlight module and liquid crystal display (LCD) using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100955568A CN101571647A (en) | 2008-04-29 | 2008-04-29 | Backlight module and liquid crystal display (LCD) using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101571647A true CN101571647A (en) | 2009-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100955568A Pending CN101571647A (en) | 2008-04-29 | 2008-04-29 | Backlight module and liquid crystal display (LCD) using same |
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| Country | Link |
|---|---|
| CN (1) | CN101571647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686934A (en) * | 2010-02-05 | 2012-09-19 | 夏普株式会社 | Lighting device and lighting apparatus provided with lighting device |
| CN103941324A (en) * | 2014-03-18 | 2014-07-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
-
2008
- 2008-04-29 CN CNA2008100955568A patent/CN101571647A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686934A (en) * | 2010-02-05 | 2012-09-19 | 夏普株式会社 | Lighting device and lighting apparatus provided with lighting device |
| CN103941324A (en) * | 2014-03-18 | 2014-07-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091104 |