CN1877418A - Back light module - Google Patents
Back light module Download PDFInfo
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- CN1877418A CN1877418A CN 200510076409 CN200510076409A CN1877418A CN 1877418 A CN1877418 A CN 1877418A CN 200510076409 CN200510076409 CN 200510076409 CN 200510076409 A CN200510076409 A CN 200510076409A CN 1877418 A CN1877418 A CN 1877418A
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- spacer
- backlight module
- isolation part
- light sources
- diffuser plate
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Abstract
The invention discloses a background light module which comprises a frame, plural light source groups, at least one separator and a diffusion board. Wherein the light source groups are installed in the frame and are driven periodically; the separator is installed on the bottom of the frame and between two adjacent light source groups; the diffusion board is installed on the frame and above the light source group and the separator, wherein the height of the separator is greater or equal half of the distance between the diffusion board and the bottom of the frame. The background light module can lower the generation of trailing smear.
Description
Technical field
The present invention relates to a kind of light source module, particularly relate to a kind of backlight liquid crystal display module.
Background technology
Along with the high development of multimedia technology, the transmission of image information at present transfers digital transmission to by simulation mostly, and in order to cooperate modern life pattern, it is frivolous that the volume of video signal or device for image also day by day is tending towards.Traditional cathode-ray tube (CRT) (Cathode Ray Tube, CRT) though display has advantages such as excellent display quality and low cost, but because the structure in its internal electron chamber, make display can't meet the demand of slimming, lightweight and low consumpting power, and the user also exist when watching radiant rays to hinder problems such as eye.Therefore, along with the maturation of photoelectric technology and semiconductor fabrication in recent years, (Flat Panel Display) is just flourish for flat-panel screens, LCD (LiquidCrystal Display wherein, LCD), replace traditional cathode-ray tube display more gradually and become the main flow of display product in recent years based on advantage such as its low voltage operating, radiationless line scattering, in light weight and volume be little.
LCD mainly comprises a display panels (liquid crystal panel) and a backlight module (backlight unit), wherein display panels is by a colored optical filtering substrates (Color Filter, C/F), a thin-film transistor array base-plate (thin film transistor array) and a liquid crystal layer that is disposed between this two substrates constitute, and backlight module is in order to provide this display panels required area source, so that LCD reaches the effect of demonstration.And, dispose a plurality of picture elements on the thin-film transistor array base-plate, wherein pass through the rotation of the liquid crystal molecule in the picture element may command display panels, with whether passing through of decision light.In addition, liquid crystal molecule turns to the location needs the regular hour, therefore at liquid crystal molecule in rotating process, display panels can be because can't effectively control the light that passes through, and generation smear (double image) phenomenon, allow the dynamic image reaction time (Motion Picture Response) of display panels increase, cause the display quality of display panels to descend.
In order to improve the above-mentioned smear phenomenon of putting forward, on the market thereby the proposition of scanning backlight module (Scanback light unit) arranged.Fig. 1 illustrates the synoptic diagram into existing scanning backlight module.Please refer to Fig. 1, scanning backlight module 104 mainly is made up of a framework 110, a plurality of light sources 120, a diffuser plate 140 and at least one blooming piece 142.In backlight module 104, light sources 120 is placed on framework 110 bottoms of backlight module 104, and this light sources 120 comprises at least one light source 122 (being three in the drawings).These light sources 120 are periodically to be driven, and display panels 102 when showing required light source provided by these light sources 120, and each light sources 120 corresponds to the zones of different of display panels 102.In addition, the function of diffuser plate 140 is that the light that light source 122 is sent spreads equably, and blooming piece 142 then is the optical quality that is used for improving backlight module 104.
Though the light sources 120 of scanning backlight module 104 periodically is driven and can reduces the smear phenomenon that is caused on display panels 102, yet light sources 120 is lighted and is turned to the location with liquid crystal molecule and still exist the regular hour poor.In addition, even liquid crystal molecule is enough rotationally fast, different light sources 120 still can produce interference each other.Because the light that any light sources 120 is sent still can arrive other light sources 120 The corresponding area, so the smear phenomenon still can exist.
Therefore, the smear phenomenon that how to reduce backlight module effectively and produced to satisfy the demand of consumer to the quality increasingly stringent of LCD, becomes a current important problem in the design of backlight module then.
Summary of the invention
The object of the present invention is to provide a kind of backlight module, the smear phenomenon that is produced to reduce on display panels effectively, and then the quality of raising LCD.
Based on above-mentioned purpose and other purpose, a further object of the present invention is providing a kind of LCD exactly, the smear phenomenon that is produced to reduce on display panels effectively, and then the quality of raising LCD.
Based on above-mentioned purpose and other purpose, the present invention proposes a kind of scanning backlight module, and this scanning backlight module comprises a framework, a plurality of light sources and at least one spacer.Light sources is disposed in the framework, and these light sources are suitable for periodically being driven respectively, and spacer is disposed at base of frame, and between two adjacent light sources.
According to scanning backlight module of the present invention, it for example also comprises a diffuser plate, and this diffuser plate is disposed on the framework, and diffuser plate is positioned at the top of light sources and spacer.Wherein, the height of spacer is more than or equal to half of distance between diffuser plate and the base of frame.Perhaps, the distance of the top of spacer and diffuser plate is less than half of distance between diffuser plate and the base of frame.In addition, the sectional area of spacer for example highly increases with it and successively decreases gradually, and the surface that regards to these light sources of spacer for example comprises plane or curved surface.In addition, backlight module of the present invention for example also comprises at least one pad, and wherein pad is disposed between spacer and the base of frame.
According to scanning backlight module of the present invention, wherein spacer for example comprises one first isolation part and one second isolation part.First isolation part is disposed at base of frame, and second isolation part is disposed on first isolation part, and the sectional area of second isolation part is the sectional area that is less than or equal to first isolation part.Wherein, the sectional area of first isolation part for example highly increases with it and successively decreases gradually, and the surface that regards to these light sources of first isolation part for example comprises plane or curved surface.In addition, second isolation part for example is tabular.
According to scanning backlight module of the present invention, wherein each light sources for example comprises at least one light source, and light source for example comprises cathode fluorescent tube or light emitting diode matrix.
Based on above-mentioned purpose and other purpose, the present invention proposes a kind of backlight module, and this backlight module comprises a framework, a plurality of light sources, at least one spacer and a diffuser plate.Light sources is disposed in the framework, and spacer is disposed at base of frame, and between two adjacent light sources.In addition, diffuser plate is disposed on the framework, and diffuser plate is positioned at the top of light sources and spacer.Wherein, the height of spacer is half more than or equal to distance between diffuser plate and the base of frame, or the distance of the top of spacer and diffuser plate is less than distance between diffuser plate and the base of frame half.
According to backlight module of the present invention, wherein the sectional area of spacer for example highly increases with it and successively decreases gradually, and the surface that regards to these light sources of spacer for example comprises plane or curved surface.In addition, backlight module of the present invention for example more comprises at least one pad, and pad is disposed between spacer and the base of frame.
According to backlight module of the present invention, wherein spacer for example comprises one first isolation part and one second isolation part.First isolation part is disposed at base of frame, and second isolation part is disposed on first isolation part, and the sectional area of second isolation part is the sectional area that is less than or equal to first isolation part.Wherein, the sectional area of first isolation part for example highly increases with it and successively decreases gradually, and the surface that regards to these light sources of first isolation part for example comprises plane or curved surface.In addition, second isolation part for example is tabular.
According to backlight module of the present invention, wherein each light sources for example comprises at least one light source, and light source for example comprises cathode fluorescent tube or light emitting diode matrix.
More propose a kind of LCD based on above-mentioned backlight module the present invention, it mainly is that backlight module and a display panels constitute thus.
Scanning backlight module of the present invention, Backlight module and liquid crystal display be the configuration isolation thing between two adjacent light sources, in order to the phase mutual interference between the isolated adjacent light source group.Therefore, can reduce issuable smear phenomenon on the display panels effectively by backlight module of the present invention, and then better display quality is provided.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the synoptic diagram of existing scanning backlight module;
Fig. 2 is the synoptic diagram of the LCD of the first embodiment of the present invention;
Fig. 3 is the part enlarged drawing of Fig. 2;
Fig. 4 is the part synoptic diagram of the backlight module of the second embodiment of the present invention;
Fig. 5 is the part synoptic diagram of the backlight module of the third embodiment of the present invention;
Fig. 6 is the part synoptic diagram of the backlight module of the fourth embodiment of the present invention;
Fig. 7 is the part synoptic diagram of the backlight module of the fifth embodiment of the present invention;
Fig. 8 is the height and the relation in dynamic image reaction time of spacer.
Embodiment
Backlight module of the present invention is main to be characterised in that, spacer is placed between every adjacent light sources.Following for embodiment will be that example describes with the scanning backlight module, yet the present invention is not limited to the scanning backlight module, the backlight module of other kind is also applicable to the present invention.
Fig. 2 illustrates the synoptic diagram of the liquid crystal display backlight module of the first embodiment of the present invention.Please refer to Fig. 2, this LCD 200 mainly is made up of a display panels 202 and a backlight module 204.Backlight module 204 mainly is made up of a framework 210, a plurality of light sources 220, at least one spacer 230, a diffuser plate 240 and at least one blooming piece 242.In backlight module 204, light sources 220 is placed on framework 210 bottoms of backlight module 204, and this light sources 220 comprises at least one light source 222 (being three in the present embodiment).Light source 222 for example is that (Cold CathodeFluorescence Lamp, CCFL), light source 222 also can be other suitable luminophor to cathode fluorescent tube certainly, as light emitting diode matrix (Light Emitting Diode Array).In addition, the function of diffuser plate 240 is that the light that light source 222 is sent spreads equably, and blooming piece 242 then is the optical quality that is used for improving backlight module 204.Light sources 220 is periodically to be driven, and the light that light source 222 is sent is via diffuser plate 240 and blooming piece 242, and offers display panels 202 as the light source that shows usefulness.
Fig. 3 illustrates the part enlarged drawing of Fig. 2.Please refer to Fig. 3, spacer 230 is disposed at framework 210 bottoms, and spacer 230 is between two adjacent light sources 220, wherein the height h of spacer 230 be more than or equal between diffuser plate 240 and framework 210 bottoms apart from half of H.In other words, the distance of the top of spacer 230 and diffuser plate 240 is half less than distance between diffuser plate 240 and framework 210 bottoms.In addition, the sectional area of spacer 230 is that the distance with itself and framework 210 bottoms increases and successively decreases gradually, so spacer 230 presents up-narrow and down-wide external form.
Please continue with reference to Fig. 3, because there is spacer 230 to exist, so different light sources 220 is not easy each other to produce and disturbs, the light that wherein any light sources 220 is sent is because of the stopping of spacer 230 that is subjected to its both sides can't arrive other light sources 220 pairing viewing areas.Thus, can effectively reduce the generation of the smear phenomenon on the display panels.
Certainly, the structure of spacer 230 is not limited to structure as shown in Figure 2, the spacer 230 of other different structure blocks effects of jamming between the Different Light group 220 as long as can reach to a certain extent, when not departing from the scope of the present invention, below will the spacer 230 of different structure be described according to appended diagram.
Fig. 4 illustrates the part synoptic diagram of the backlight module of the second embodiment of the present invention.Please refer to Fig. 4, the spacer 330 of present embodiment is made of one first isolation part 332 and one second isolation part 334.First isolation part 332 is disposed at framework 310 bottoms, and second isolation part 334 is disposed on first isolation part 332, and the sectional area of second isolation part 334 is the sectional areas that are less than or equal to first isolation part 332.In addition, the sectional area of first isolation part 332 is highly to increase and successively decrease gradually with it, and second isolation part 334 is tabular.In addition, the light source 322 of light sources 320 also adopts cathode fluorescent tube in the present embodiment.Be noted that first isolation part 332 of the spacer 330 of present embodiment and the summation height h of second isolation part 334 are more than or equal to half of the spacing H of diffuser plate 340 and framework 310 bottoms.In other words, the distance of the top of spacer 330 and diffuser plate 340 is half less than the spacing of diffuser plate 340 and framework 310 bottoms.As in backlight module 304, remaining member is described in detail in first embodiment, just repeats no more at this.
Please be simultaneously with reference to Fig. 3 and Fig. 4, first isolation part 332 of spacer 230 and spacer 330, its surface 236,336 that regards to light sources 220,320 is the plane.Yet surface 236 and surface 336 also can be curved surface.
Please continue with reference to Fig. 3 and Fig. 4, because the existence of spacer 230,330 is arranged in backlight module 204,304, therefore can present uneven largely phenomenon in framework 210,310 bottoms, and cause the liquid crystal panel zone above spacer 230,330 to produce the bright rays phenomenon.
In order to reduce the generation of bright rays phenomenon, the gradient of first isolation part 332 of spacer 230 or spacer 330 is reduced.Yet, reduce to make the whole height of spacer 330 to reduce the gradient of first isolation part 332 of spacer 330, therefore can be remedied by the height that increases by second isolation part 332.Because the sectional area of second isolation part 332 is little than the sectional area of first isolation part 332, so the bright rays phenomenon that is produced is more not obvious.
In addition, the reflectivity properties on first isolation part 332 by changing spacer 330 and the surface of second isolation part 334 also can exert an influence to the bright rays phenomenon that spacer 330 is caused.For example, when the surface of first isolation part 332 and second isolation part 334 is the character of total reflection (minute surface that is commonly called as), can on display panels, produce tangible bright rays, and when the surface of first isolation part 332 and second isolation part 334 is the character of scattering (fine flour that is commonly called as), only can on display panels, produce fine bright line.In addition, when the surface of first isolation part 332 is a fine flour, and the surface of second isolation part 334 is when being minute surface, and the part of the display panels of second isolation part, 334 correspondences is comparatively dull, and the part of first isolation part, 332 correspondences is then comparatively bright.In addition, when the surface of first isolation part 332 is a minute surface, and the surface of second isolation part 334 is when being fine flour, and the part of the display panels of second isolation part, 334 correspondences is comparatively bright, and the part of first isolation part, 332 correspondences is then comparatively dull.Therefore, the present invention works as visual actual state the reflectivity properties on the surface of first isolation part 332 and second isolation part 334 is arranged in pairs or groups, so that backlight module can provide light source comparatively uniformly.
Fig. 5 illustrates the part synoptic diagram of the backlight module of the third embodiment of the present invention, and Fig. 6 illustrates the part synoptic diagram of the backlight module of the fourth embodiment of the present invention.Please be simultaneously with reference to Fig. 5 and Fig. 6, light source 422,522 is a light emitting diode matrix, light source 422,522 also can be other suitable luminophor certainly, as cathode fluorescent tube.First isolation part 532 of spacer 430 and spacer 530, its surface 436,536 that regards to light sources 420,520 is curved surface.Certainly, in other embodiments, surface 436,536 can for example be the plane also.And, for the bottom that makes spacer 430,530 be positioned at the contour plane of light source 422,522 on, can between spacer 430,530 and framework 410,510 bottoms, dispose a pad 450,550.
Fig. 7 illustrates the part synoptic diagram of the backlight module of the fifth embodiment of the present invention, and backlight module 704 is to adopt flat spacer 630 also can reach the interference of blocking between the Different Light group 620 among Fig. 7.
In addition, from experiment as can be known, the height of spacer also can exert an influence to dynamic image reaction time (MotionPicture Response).Table 1 is listed the height, scan rate (scanduty) of the spacer of backlight module and the relation in the dynamic image reaction time of display panels, in experiment, apart from being 20mm for example, scan rate referred to herein as the ratio of the fluorescent lifetime of light sources reality with respect to the switch periods of light sources between diffuser plate and the base of frame.As known from Table 1, when the height of spacer is healed when high, the average dynamic image reaction time is shorter, more can improve the quality of LCD.This phenomenon is because the height of spacer is higher, more can completely cut off the interference between the Different Light group.
In addition, can obtain as shown in Figure 8 the spacer height and the graph of relation in dynamic image reaction time, can find that wherein the dynamic image reaction time can significantly decrease when spacer height during greater than 10mm according to table 1.Because apart from being 20mm, the height of therefore working as spacer as can be known is the half (being 10mm) more than or equal to distance between diffuser plate and the base of frame between diffuser plate and the base of frame, the display quality of LCD can obtain significant raising.
Table 1
| Spacer height (mm) | Scan rate (%) | The average dynamic image reaction time (ms) |
| Not 0 (not adding spacer) | 50 | 17.03 |
| Not 0 (not adding spacer) | 37.5 | 16.55 |
| 10 | 50 | 16.48 |
| 10 | 37.5 | 16.02 |
| 14.5 | 50 | 16.01 |
| 14.5 | 37.5 | 14.75 |
| 16 | 50 | 15.34 |
| 16 | 37.5 | 14.58 |
| 19 | 50 | 14.91 |
| 19 | 37.5 | 14.27 |
In sum, comprise a framework, a plurality of light sources and at least one spacer at backlight module of the present invention.Light sources is suitable for periodically being driven respectively, and spacer is disposed at base of frame, and between two adjacent light sources, wherein can effectively intercept phase mutual interference between the different light sources by spacer.Therefore, the smear phenomenon that the present invention can reduce backlight module effectively and produced, and then shorten dynamic image reaction time of LCD, to improve the display quality of LCD.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do some change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (19)
1. scanning backlight module comprises:
One framework;
A most light sources be disposed in this framework, and those light sources are suitable for periodically being driven respectively; And
At least one spacer is disposed in this framework, and this spacer is between two adjacent those light sources.
2. backlight module as claimed in claim 1, also comprise a diffuser plate, this diffuser plate is configured on this framework, and this diffuser plate is positioned at the top of those light sources and this spacer, and wherein the height of this spacer is more than or equal to half of distance between this diffuser plate and this base of frame.
3. backlight module as claimed in claim 1, wherein the sectional area of this spacer is highly to increase and successively decrease gradually with it.
4. backlight module as claimed in claim 3, wherein the surface that regards to those light sources of this spacer comprises plane or curved surface.
5. backlight module as claimed in claim 3 also comprises at least one pad, and wherein this pad is disposed between this spacer and this base of frame.
6. backlight module as claimed in claim 1, wherein this spacer comprises one first isolation part and one second isolation part, this first isolation part is disposed at this base of frame, and this second isolation part is disposed on this first isolation part, and the sectional area of this second isolation part is less than or equal to the sectional area of this first isolation part.
7. backlight module as claimed in claim 1, wherein each those light sources comprises at least one light source.
8. backlight module as claimed in claim 7, wherein this light source comprises cathode fluorescent tube or light emitting diode matrix.
9. backlight module as claimed in claim 1, also comprise a diffuser plate, this diffuser plate is disposed on this framework, and this diffuser plate is positioned at the top of those light sources and this spacer, and wherein the distance of the top of this spacer and this diffuser plate is less than half of the spacing of this diffuser plate and this base of frame.
10. backlight module comprises:
One framework;
A most light sources are disposed in this framework;
At least one spacer is arranged between two adjacent those light sources; And
One diffuser plate is disposed on this framework, and this diffuser plate is positioned at the top of those light sources and this spacer, and wherein the distance of the top of this spacer and this diffuser plate is less than half of distance between this diffuser plate and this base of frame.
11. backlight module as claimed in claim 10, wherein the sectional area of this spacer is highly to increase and successively decrease gradually with it.
12. backlight module as claimed in claim 10, wherein the surface that regards to those light sources of this spacer comprises plane or curved surface.
13. backlight module as claimed in claim 10 also comprises at least one pad, wherein this pad is disposed between this spacer and this base of frame.
14. backlight module as claimed in claim 10, wherein this spacer comprises one first isolation part and one second isolation part, this first isolation part is disposed at this base of frame, and this second isolation part is disposed on this first isolation part, and the sectional area of this second isolation part is less than or equal to the sectional area of this first isolation part.
15. backlight module as claimed in claim 10, wherein each those light sources comprises at least one light source.
16. backlight module as claimed in claim 10, wherein this light source comprises cathode fluorescent tube or light emitting diode matrix.
17. a LCD comprises:
One display panels;
One backlight module comprises:
One framework;
A most light sources are disposed in this framework;
At least one spacer is arranged between two adjacent those light sources; And
One diffuser plate is disposed on this framework, and this diffuser plate is positioned at the top of those light sources and this spacer, and wherein the distance of the top of this spacer and this diffuser plate is less than half of distance between this diffuser plate and this base of frame.
18. backlight module as claimed in claim 17, wherein the surface that regards to those light sources of this spacer comprises plane or curved surface.
19. backlight module as claimed in claim 17, wherein this spacer comprises one first isolation part and one second isolation part, this first isolation part is disposed at this base of frame, and this second isolation part is disposed on this first isolation part, and the sectional area of this second isolation part is less than or equal to the sectional area of this first isolation part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100764092A CN1877418B (en) | 2005-06-07 | 2005-06-07 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100764092A CN1877418B (en) | 2005-06-07 | 2005-06-07 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1877418A true CN1877418A (en) | 2006-12-13 |
| CN1877418B CN1877418B (en) | 2010-12-08 |
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ID=37509894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100764092A Expired - Fee Related CN1877418B (en) | 2005-06-07 | 2005-06-07 | Back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1877418B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188776A (en) * | 2018-10-31 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and electronic equipment |
| CN114442371A (en) * | 2022-01-18 | 2022-05-06 | 武汉华星光电技术有限公司 | Display back plate and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6871982B2 (en) * | 2003-01-24 | 2005-03-29 | Digital Optics International Corporation | High-density illumination system |
-
2005
- 2005-06-07 CN CN2005100764092A patent/CN1877418B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188776A (en) * | 2018-10-31 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and electronic equipment |
| CN114442371A (en) * | 2022-01-18 | 2022-05-06 | 武汉华星光电技术有限公司 | Display back plate and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1877418B (en) | 2010-12-08 |
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