CN1869791A - Backlight unit and liquid crystal display - Google Patents
Backlight unit and liquid crystal display Download PDFInfo
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- CN1869791A CN1869791A CN 200610093651 CN200610093651A CN1869791A CN 1869791 A CN1869791 A CN 1869791A CN 200610093651 CN200610093651 CN 200610093651 CN 200610093651 A CN200610093651 A CN 200610093651A CN 1869791 A CN1869791 A CN 1869791A
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- plane area
- backlight module
- light source
- pointolite
- source support
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000004308 accommodation Effects 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005282 brightening Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
A backlight unit is prepared as setting a light source support zone on support base and at least two point light sources on light source support zone, setting diffusion plate above support base and two said point light sources, making positions of two said point light sources be different along thickness direction of backlight unit or making optical axis pointing directions of emitting light be different for raising optical performance of backlight unit.
Description
Technical field
The present invention is about a kind of backlight module, and particularly about a kind of backlight liquid crystal display module that can be applicable to.
Background technology
Luminous efficacy owing to light emitting diode (LED) has obtained significantly to improve in recent years, be expected future to surmount cathode fluorescent tube (CCFL) even run neck and neck with cathode fluorescent tube (CCFL), therefore light emitting diode (LED) can more extensively apply to various light fixture, particularly applicable to requiring on the light source of higher various information display devices for luminescent quality and efficient.
Traditional fluorescent light is a line source, and for example cathode fluorescent tube (CCFL) does not have special optical axis and special luminous smooth type, and when using these conventional light source, the design variable that needs to consider does not need too much, and is comparatively simple.Yet for the pointolite of for example LED, its principle of luminosity and encapsulation pattern are different with fluorescent light or other conventional light source,, LED can produce own distinctive luminous smooth type in the space; These light types are to occur with axisymmetric form substantially, the emergent ray of this light source form one special axially, produce an imaginary optical axis.Therefore, the adjustment of LED optical axis produces significant effects to its utilization of light type in the space.Owing to have the characteristic of optical axis and different luminous smooth types, in design with LED during when the backlight module of light source, must be through more careful optical design, the characteristics of luminescence that just can more effective this kind of utilization pointolite like this.
Generally speaking, can utilize half strong angle (FWHM, Full width at half maximum) size to estimate circular luminous intensity angle distribution situation.Wherein, suppose that highest intensity value is A, then half-value angle or title apparent value angle are meant that luminous intensity values is the angle of direction and the normal direction of A/2.If divide from luminous intensity angle distribution plan, the luminous smooth type of LED is broadly divided into three classes: high directivity, have very high directive property, and can make local lighting light source usefulness, half-value angle is 5 degree～20 degree or littler; Standard form is made pilot lamp usefulness usually, and half-value angle is 20 degree～45 degree; Scatter-type, this is the bigger pilot lamp in visual angle, half-value angle is 45 degree～90 degree or bigger.
For example US business lumileds company promptly produces the LED product with different luminous smooth types (radiation pattern).Its luminous smooth type for example shown in Figure 1A～Fig. 1 C, has the bat aerofoil profile (Batwingtype) of Figure 1A, the dome-type of Figure 1B (Lambertian type), the side light type of Fig. 1 C various luminous smooth types such as (Side-emitting type).Industry still has the LED design of light-focusing type (Collimated radiation pattern) in addition.Therefore, how utilizing the distinctive luminous smooth type that is different from conventional light source, in the design of backlight module, promptly is one of target of our effort at present with effective application LED.
Pointolite with for example LED is the backlight module of light source at present, is substrate with the complete flat board of a monoblock mostly, and LED is arranged thereon.When being Z axle forward with the exiting surface, LED is provided with the position and only can adjusts on X-axis, Y-axis two directions in backlight module, therefore, for center brightness and the homogeneity of adjusting backlight module, only can do variation with regard to the horizontal level of LED.Yet under existing structure, center brightness and homogeneity are to decide according to the distribution scenario of LED on the XY plane, are the parameters for mutual exclusion, often are difficult for obtaining further balance on practice.
In view of this, how to improve the design parameter of LED, and then can effectively utilize the distinctive luminous smooth type of LED, be the direction that the insider endeavoured.
Summary of the invention
Purpose of the present invention is providing for example backlight module of the pointolite of LED of a kind of use, and it has a supporting seat, can be constituted by non-single plane or by a curved surface.Under this structure, LED can also control the optical axis direction of LED by the attitude of adjusting the LED supporting seat except the density that can adjust with control LED distribution on horizontal level.Therefore, the present invention can have more the design parameter of " optical axis direction " than traditional direct-light type LED backlight module, can more effectively utilize LED distinctive luminous smooth type in the space, to obtain the balance of backlight module in center brightness and uniformity coefficient.
According to one embodiment of the present invention, this backlight module comprises a supporting seat, at least two pointolites and a diffuser plate, wherein, this supporting seat has a light source Support, these at least two pointolites then are arranged on this light source Support, and this diffuser plate is arranged on this supporting seat and those pointolites top, and the position difference of these at least two pointolites on the thickness direction of this backlight module.
According to another preferred embodiment of the present invention, this backlight module comprises a supporting seat, at least two pointolites and a diffuser plate, wherein, this supporting seat has a light source Support, these at least two pointolites then are arranged on this light source Support, and this diffuser plate is arranged on this supporting seat and those pointolites top, and the optical axis direction of this first pointolite and this second pointolite is not parallel.
Another preferred embodiment according to the present invention, this LCD comprises a liquid crystal panel, and a backlight module and has the shell of an accommodation space, and this shell is in order to ccontaining this liquid crystal panel and this backlight module.This backlight module comprises a supporting seat, at least two pointolites and a diffuser plate, wherein, this supporting seat has a light source Support, these at least two pointolites then are arranged on this light source Support, this diffuser plate is arranged on this supporting seat and those pointolites top, and the position difference of these at least two pointolites on the thickness direction of this backlight module.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below:
Description of drawings
Figure 1A～Fig. 1 C illustrates the luminous smooth type of various differences of LED.
Fig. 2 is the decomposing schematic representation of a display device.
Fig. 3 is the schematic exploded perspective view of backlight module of the present invention.
Fig. 4 A～Fig. 4 H illustrates the various alternate embodiment of supporting seat of the present invention.
Fig. 5 is the another kind of embodiment of supporting seat of the present invention.
The primary clustering symbol description
1～backlight module; 2～display panel;
3～shell; 10～supporting seat;
11～diffuser plate; 12～optical module;
13～housing; 101～pointolite;
104～light source Support; 104A～first plane area;
104B～second plane area; 104C～the 3rd plane area;
104D～the 4th plane area; 104E～the 5th plane area;
104F～the 6th plane area; 106～non-light source Support;
106A～sidewall; 106B～sidewall;
204～light source Support; 204A～first plane area;
204B～second plane area; 206～non-light source Support;
206A～sidewall; 206B～sidewall;
304～light source Support; 304A～first plane area;
304B～second plane area; 306～non-light source Support (sidewall);
304 ', 304 "～the light source Support; 304A ', 304A "～first plane area;
304B ', 304B "～second plane area; 306 ', 306 "～non-light source Support;
404,504,604,704,804～light source Support;
406,506,606,706,806～non-light source Support;
404A, 404B, 404C～first plane area～the 3rd plane area;
504A, 504B, 504C～first plane area～the 3rd plane area;
604A, 604B, 604C, 604D, 604E, 604F～first plane area～the 6th plane area;
704A, 704B, 704C, 704D～first plane area～the 4th plane area;
I～secondary light source Support;
II～secondary light source Support.
Embodiment
See also Fig. 2, it illustrates the decomposing schematic representation of a flat display apparatus.This display device is by backlight module 1 haply, and display panel 2 and shell 3 combine, and wherein the detailed decomposition diagram of backlight module 1 sees also Fig. 3.Backlight module 1 is by supporting seat 10 haply, light source 101, and diffuser plate 11, other optical module 12 and housing 13 combine.So-called herein other optical module 12 can be a slice or the blooming piece of multi-disc, and blooming piece can for example be a diffusion sheet, prismatic lens, microstructure sheet, brightening piece or other can change the diaphragm of the optical characteristics of incident light.In addition, between supporting seat 10 and diffuser plate 11, in case of necessity, also can add some optical modules, with utilization factor that improves light or the distributed needs that meets light; Or add some accessory parts, to strengthen this body structure of backlight module or design requirement.
See also Fig. 3, supporting seat 10 is provided with a plurality of pointolites 101, and those pointolites 101 are the pointolite with different luminous smooth types of for example LED.Supporting seat 10 roughly can be divided into for example non-light source Support 106 of sidewall 106A, a light source Support 104 and.In this embodiment, the sidewall 106A diffuser plate 11 that can be arranged in order to support.The shape of this sidewall 106A can be for example sidewall 106A with U-shaped section shown in the figure, or other for example L type profile or sidewall of Any shape, does not exceed shown in scheming.The sidewall 106A of non-light source Support 106 can also be for example sidewall 106A that is positioned at light source Support 104 2 side sides shown in the figure for around the sidewall around the light source Support 104.
At least two zones can be divided in light source Support 104, for example the first plane area 104A shown in the figure and the second plane area 104B.On the first plane area 104A and the second plane area 104B, be provided with a plurality of LED separately.Because the first plane area 104A and the second plane area 104B are positioned at different surface levels, therefore a plurality of LED that are arranged on the first plane area 104A and the second plane area 104B lay respectively at different surface levels, that is to say the position difference of a plurality of LED on the thickness direction of this backlight module 1 that is arranged on the first plane area 104A and the second plane area 104B.As shown in FIG., the second plane area 104B be by the first plane area 104A around an elevated regions.A plurality of pointolites 101 are separately positioned on the first plane area 104A and the second plane area 104B.In this figure, in the middle of the first plane area 104A and the second plane area 104B, can see one for example the non-light source Support 106 of sidewall 106B be provided with therebetween.The shape of sidewall 106B can be looked design requirement and is vertical or plane inclined, even be to be a curved surface.The height of sidewall 106B can cooperate different pointolite characteristics or design requirement and changes, producing the display brightness that will reach or to show uniformity coefficient, or light distribution requirement especially.
See also Fig. 4 A～Fig. 4 H, it illustrates some alternate embodiment of supporting seat 10 of the present invention, in order to simplify accompanying drawing, only at Fig. 4 A and Fig. 4 B three pointolites 101 are shown and think exemplary illustration, and in Fig. 4 C～Fig. 4 H, pointolite then omits not give and illustrates.
See also Fig. 4 A, light source Support 204 comprises the first plane area 204A and the second plane area 204B with different level, and the second plane area 204B can be similar with Fig. 3, for by the first plane area 204A around an elevated regions.Certainly, light source Support 204 can also be for having a plurality of first plane area 204A and a plurality of second plane area 204B, and the second plane area 204B and the first plane area 204A are the design arrangements that is staggered of the mode with row or column; Perhaps, light source Support 204 is for having a plurality of first plane area 204A and a plurality of second plane area 204B, and these a plurality of first plane area 204A and a plurality of second plane area 204B are staggered with array way, and suchlike design all can change and applies among the present invention.Other has the sidewall 206A that is positioned at 204 outsides, light source Support and is positioned at the first plane area 204A and the non-light source Support 206 of the sidewall 206B of the second plane area 204B.Wherein, sidewall 206A and sidewall 206B are vertical sidewall form.
See also Fig. 4 B, light source Support 304 comprises the first plane area 304A and the second plane area 304B, the second plane area 304B by first plane area 304A institute around, two planes are direct adjacency.Non-light source Support 306 is positioned at the outside of the first plane area 304A and the second plane area 304B, and non-light source Support 306 is not between the first plane area 304A and the second plane area 304B.The first plane area 304A is an inclined-plane and the second plane area 304B is a surface level, that is the normal of the first plane area 304A and the second plane area 304B is also not parallel.
See also Fig. 4 C, the wherein situation of its displayed map 4B, in this example, the second plane area 304B ' is a rectangle, and the first plane area 304A ' is subdivided into four inclined-planes towards the second plane area 304B ', and non-light source Support 306 ' is then around around the first plane area 304A ' and the second plane area 304B '.
See also Fig. 4 D, another situation of its displayed map 4B, in this example, the second plane area 304B " be an ellipse; and the first plane area 304A " be subdivided into four towards the second plane area 304B " the inclined-plane, non-light source Support 306 " then around the first plane area 304A " and the second plane area 304B " around.
See also Fig. 4 E, with respect to Fig. 4 C, light source Support 404 also comprises one the 3rd plane area 404C, the first plane area 404A be the 3rd plane area 404C institute around.The first plane area 404A and the 3rd plane area 404C are two uneven adjacent inclined-planes, and the second plane area 404B is a surface level, wherein, the first plane area 404A, the normal of the second plane area 404B and the 3rd plane area 404C is not parallel to each other.
See also Fig. 4 F, with respect to Fig. 4 C, light source Support 504 also comprises one the 3rd plane area 504C, the first plane area 504A be the 3rd plane area 504C institute around.Different with Fig. 4 E is, the second plane area 504B and the 3rd plane area 504C are a surface level, and the first plane area 504A is an inclined-plane, and wherein, the second plane area 504B and the 3rd plane area 504C are positioned at different surface levels.
See also Fig. 4 G, with respect to Fig. 4 E, light source Support 604 also comprises the 4th plane area～the 6th plane area 604D～604F, the 3rd plane area 604C be the 4th plane area 604D institute around, the 4th plane area 604D be the 5th plane area 604E institute around, the 5th plane area 604E be the 6th plane area 604F institute around.Except the second plane area 604B is the surface level, the first plane area 604A and the 3rd plane area～the 6th plane area 604C～604F is adjacent successively not parallel inclined-plane.The normal of the first plane area 604A and the 3rd plane area～the 6th plane area 604C～604F is not parallel to each other.
See also Fig. 4 H, with respect to Fig. 4 E or Fig. 4 is G, secondary light source Support I and secondary light source Support II two are divided into partly in light source Support 704.Secondary light source Support I and secondary light source Support II two partly distinctly have a plurality of plane areas, for example first plane area～the 4th plane area 704A～704D.
See also Fig. 5, light source Support 804 is a curved regions, and the position of a plurality of pointolites disposed thereon (not shown go out) on the thickness direction of backlight module can be because the curved surfaces variations of light source Support 804 itself have difference.Shown in this figure curved surface is a continually varying curved surface, during right practice not as limit.
In the present invention, alleged light source Support, in order to the usefulness of light source to be set, yet each plane of light source Support or curved surface might not all will be provided with light source.A plurality of pointolites can have the different density that is provided with according to the distributed needs of actual design on different planes or curved surface.
At one for example in the alternate embodiment of Fig. 4 C, a plurality of pointolites are to be arranged on the first plane area 304A ', these a plurality of pointolites can be arranged on as four first plane area 304A ' among Fig. 4 C, can also only be arranged on two first plane area 304A ' among four the first plane area 304A ', these two first plane area 304A ' can be for being positioned at two first plane area 304A ' of opposite side, can also be for being positioned at two first plane area 304A ' of sides adjacent.In another alternate embodiment, the plane of the light source Support of set-point light source or the area of curved surface can dwindle not.
Though the present invention with several preferred embodiments openly as above; right its is not in order to qualification the present invention, any insider, without departing from the spirit and scope of the present invention; when can changing arbitrarily and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (22)
1. backlight module comprises:
One supporting seat has a light source Support;
One first pointolite and one second pointolite are arranged on this light source Support, this first pointolite and the position difference of this second pointolite on the thickness direction of this backlight module; And
One diffuser plate is arranged on this supporting seat and those pointolites top.
2. backlight module according to claim 1 is characterized in that, this light source Support comprises a curved regions.
3. backlight module according to claim 2 is characterized in that, this light source Support also comprises a plane area.
4. backlight module according to claim 1 is characterized in that, this light source Support comprises one first plane area and one second plane area.
5. backlight module according to claim 4 is characterized in that, the normal of this first plane area and this second plane area is not parallel.
6. backlight module according to claim 5 is characterized in that, at least this first plane area or this second plane area one of them be an inclined-plane.
7. backlight module according to claim 4 is characterized in that, this first plane area and this second plane area have different surface levels.
8. according to the arbitrary described backlight module in the claim 4～7, it is characterized in that, also comprise one the 3rd plane area.
9. backlight module according to claim 8 is characterized in that, the 3rd plane area is a surface level.
10. backlight module according to claim 8 is characterized in that, the 3rd plane area is an inclined-plane.
11. backlight module according to claim 7 is characterized in that, the surface level of this second plane area is higher than the surface level of this first plane area.
12. backlight module according to claim 7 is characterized in that, the surface level of this second plane area is lower than the surface level of this first plane area.
13., it is characterized in that this first plane area is around this second plane area according to claim 11 or 12 described backlight modules.
14., it is characterized in that this second plane area is around this first plane area according to claim 11 or 12 described backlight modules.
15., it is characterized in that this first plane area and this second plane area are staggered according to claim 11 or 12 described backlight modules.
16., it is characterized in that this first plane area and this second plane area are to arrange with array way according to claim 11 or 12 described backlight modules.
17. backlight module according to claim 1 is characterized in that, this first pointolite and this second pointolite have different luminous intensity distribution plot.
18. a LCD comprises:
One liquid crystal panel;
One backlight module according to claim 1 is arranged on the below of this liquid crystal panel; And
One shell has an accommodation space, in order to ccontaining this liquid crystal panel and this backlight module.
19. a backlight module comprises:
One supporting seat has a light source Support;
One first pointolite and one second pointolite are arranged on this light source Support, and the optical axis direction of this first pointolite and this second pointolite is not parallel; And
One diffuser plate is arranged on this supporting seat and those pointolites top.
20. backlight module according to claim 19 is characterized in that, this light source Support comprises a curved regions.
21. backlight module according to claim 19, it is characterized in that, this light source Support comprises one first plane area and one second plane area, the normal of this first plane area and this second plane area is not parallel, and this first pointolite and this second pointolite are separately positioned on this first plane area and this second plane area.
22. backlight module according to claim 19 is characterized in that, this first pointolite and this second pointolite have different luminous intensity distribution plot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100936515A CN100410772C (en) | 2006-06-14 | 2006-06-14 | Backlight unit and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100936515A CN100410772C (en) | 2006-06-14 | 2006-06-14 | Backlight unit and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869791A true CN1869791A (en) | 2006-11-29 |
| CN100410772C CN100410772C (en) | 2008-08-13 |
Family
ID=37443487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100936515A Expired - Fee Related CN100410772C (en) | 2006-06-14 | 2006-06-14 | Backlight unit and liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100410772C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994961A (en) * | 2009-08-20 | 2011-03-30 | Nec液晶技术株式会社 | Backlight device |
| CN103672617A (en) * | 2013-12-12 | 2014-03-26 | 广州创维平面显示科技有限公司 | Display device and ultra-thin type backlight module thereof |
| CN112634827A (en) * | 2021-01-27 | 2021-04-09 | 季华实验室 | Single-box correction plane tilt correction method and device, electronic equipment and storage medium |
| CN113051965A (en) * | 2019-12-26 | 2021-06-29 | 群创光电股份有限公司 | Electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4298124B2 (en) * | 2000-03-29 | 2009-07-15 | シチズンファインテックミヨタ株式会社 | Direct type backlight |
| JP4169257B2 (en) * | 2002-11-29 | 2008-10-22 | オプトレックス株式会社 | Backlight device for liquid crystal display element |
| JP2005044566A (en) * | 2003-07-24 | 2005-02-17 | Seiko Epson Corp | Illuminator, electro-optical device and electronic appliance |
| CN1313874C (en) * | 2004-07-27 | 2007-05-02 | 友达光电股份有限公司 | LED back light module |
-
2006
- 2006-06-14 CN CNB2006100936515A patent/CN100410772C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994961A (en) * | 2009-08-20 | 2011-03-30 | Nec液晶技术株式会社 | Backlight device |
| CN101994961B (en) * | 2009-08-20 | 2015-07-29 | Nlt科技股份有限公司 | Back lighting device |
| CN103672617A (en) * | 2013-12-12 | 2014-03-26 | 广州创维平面显示科技有限公司 | Display device and ultra-thin type backlight module thereof |
| CN103672617B (en) * | 2013-12-12 | 2016-07-06 | 广州创维平面显示科技有限公司 | Display device and ultrathin backlight module thereof |
| CN113051965A (en) * | 2019-12-26 | 2021-06-29 | 群创光电股份有限公司 | Electronic device |
| CN112634827A (en) * | 2021-01-27 | 2021-04-09 | 季华实验室 | Single-box correction plane tilt correction method and device, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100410772C (en) | 2008-08-13 |
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Granted publication date: 20080813 |