CN101363577B - Backlight module using combined light source module and method for manufacturing same - Google Patents
Backlight module using combined light source module and method for manufacturing same Download PDFInfo
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- CN101363577B CN101363577B CN2008101613892A CN200810161389A CN101363577B CN 101363577 B CN101363577 B CN 101363577B CN 2008101613892 A CN2008101613892 A CN 2008101613892A CN 200810161389 A CN200810161389 A CN 200810161389A CN 101363577 B CN101363577 B CN 101363577B
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Abstract
The invention discloses a backlight module using the light mixing technology, a used light source module and a making method thereof, and the backlight module comprises a light source module and an optical plate. When the light source module outputs a mixing light, the chromaticity coordinate position of the mixing light falls into a target color gamut space. The light source module comprises a first light source and a second light source which are staggered for arrangement, and the chromaticity coordinate position of the outputting light of the first light source falls into a first color gamut space on a chromaticity coordinate plane while the chromaticity coordinate position of the outputting light of the second light source falls into a second color gamut space on the chromaticity coordinate plane. The first color gamut space and the second color gamut space are within the area coverage of the maximum width of less than or equal to 0.02 respectively on the chromaticity coordinate, and the first color gamut space is symmetric to the second color gamut space correspondingly to the target color gamut space.
Description
Technical field
The present invention is about a kind of backlight module, its employed light source module and manufacture method thereof; Particularly, the present invention is about a kind of backlight module, its employed light source module and manufacture method thereof of using the mixed light technology.
Background technology
The display apparatus of display panel and use display panel becomes the main flow of all kinds of display device gradually.The display screens of flat-plate type monitor, mobile phone and the digital camera of flat-surface television, personal computer and the laptop computer of for example various panel display screen, family expenses etc. are the product of a large amount of use display panels.Particularly the market demand of liquid crystal indicator is significantly grown up in recent years, and for the fluid,matching crystal device reaches apparent requirement on function, the employed backlight module design of liquid crystal indicator also becomes more diversified.
Backlight module with side entering type is an example, and light-emitting diode component is used as the source that light is provided by a large amount of.As shown in Figure 1a, backlight module includes optical sheet 10 and striation (light bar) 30.Striation 30 is provided with the light emitting diode 31 of a plurality of line spread as light source.Generally speaking, backlight module more often uses white light emitting diode as back light.Yet be subjected to the restriction of fluorescent powder coating process control ability, colourity or the even phenomenon of irregular colour take place in the finished product of white light emitting diode easily.Shown in Fig. 1 b, the white light emitting diode that same technology produces presents in the mode of band shape usually in the formed spectral distribution of chrominance space, and the one end approaches yellow range, and the other end then approaches blue light range.For reaching display chroma evenly and the requirement of the white picture specification of display, generally can select to use white light emitting diode with same colourity, for example select chromaticity coordinate to fall into the white light emitting diode of scope 50.If this mode of use, then the white light emitting diode with the part outside scope 50 of color coordinates distribution in a collection of product then can't use, and causes cost to improve.
For solving this problem, also there is partial design to use special optical sheet or packaging body, to solve the problem of each led color inequality.Yet this mode tend to reduce light source luminescence efficiency, influence brightness, and cost is increased.
Summary of the invention
The object of the present invention is to provide a kind of backlight module, have lower production cost.
Another object of the present invention is to provide a kind of light source module, can keep stable colourity performance.
The object of the present invention is to provide a kind of backlight module manufacture method, can reduce production costs.
Backlight module of the present invention includes light source module and sheet or tabular optical sheet.The light that light source module sends goes into to inject optical sheet, exports light as backlight by optical sheet again.Light source module is exported a mixed light, and the chromaticity coordinate position of mixed light falls into the target color gamut space, and the center in target color gamut space then is the target color point of the desired generation light of light source module.Light source module comprises staggered first light source and secondary light source.The chromaticity coordinate position of first light source output light falls within first color gamut space on the chromaticity coordinate plane; And the chromaticity coordinate position of secondary light source output light falls within second color gamut space on the chromaticity coordinate plane.First color gamut space and second color gamut space are respectively that breadth extreme is less than or equal to 0.02 regional extent on the chromaticity coordinate, and first color gamut space is with respect to the target color gamut space and the second color gamut space symmetry.By this design, the light that the light that first light source produces and secondary light source produce is in the mixed light that mixes generation, and its chromaticity coordinate promptly can fall in the target color gamut space.Therefore the mixed light of light source module generation can meet the demand in the design.
Backlight module manufacture method of the present invention comprises the following step: the target color gamut space that decision light source module output mixed light falls into; Select a plurality of first light sources, the chromaticity coordinate position of a plurality of first light sources output light is fallen within first color gamut space on the chromaticity coordinate plane; Select a plurality of secondary light sources, the chromaticity coordinate position of a plurality of secondary light sources output light is fallen within second color gamut space on the chromaticity coordinate plane; First light source and secondary light source are staggered.
Description of drawings
Fig. 1 a is the synoptic diagram of traditional side entrance back module;
Fig. 1 b is the white light emitting diode chromaticity coordinate synoptic diagram that uses in the traditional backlight module;
Fig. 2 is the embodiment synoptic diagram of backlight module of the present invention;
Fig. 3 is the embodiment synoptic diagram of first color gamut space and second color gamut space;
Fig. 4 is the synoptic diagram of another embodiment of light source module;
Fig. 5 a is the embodiment synoptic diagram that light source module forms area source;
Fig. 5 b is another embodiment synoptic diagram that light source module forms area source;
Fig. 6 is the embodiment process flow diagram of backlight module manufacture method.
[primary clustering symbol description]
100 optical sheets, 101 light faces
300 light source modules
301 target color gamut spaces
303 target color point
310 first light sources
311 chromaticity coordinate positions
320 secondary light sources
321 chromaticity coordinate positions
510 first color gamut space
520 second color gamut space
Embodiment
The invention provides a kind of backlight module, its employed light source module and manufacture method thereof.With preferred embodiment, this backlight module feed flow crystal device uses.Yet in different embodiment, this backlight module also can need the device of planar light source to use for computer keyboard, mobile phone button, billboard and other.In preferred embodiment, liquid crystal indicator of the present invention comprises a color liquid crystal display arrangement.Yet in different embodiment, liquid-crystal apparatus of the present invention also can comprise monochromatic liquid crystal indicator.In addition, liquid crystal indicator general reference is used the display device of liquid crystal panel, comprises the LCDs etc. of LCD monitor, mobile phone and digital camera of LCD TV, personal computer and the laptop computer of family expenses.
As shown in Figure 2, backlight module of the present invention includes light source module 300 and optical sheet 100.Light source module 300 adjacent optical plates 100 are provided with, and are arranged at the incidence surface 101 of optical sheet 100.Light source module 300 produces light and is incident in the optical sheet 100 via incidence surface 101.In this embodiment, light source module 300 is the side entering type light source, and optical sheet 100 then is a light guide plate, and incidence surface 101 is the lateral margin of optical sheet.The light of light source module 300 enters optical sheet 100 by the incidence surface 101 that is positioned at lateral margin, transmits evenly to distribute and the backlight module of formation side entering type in optical sheet 100 again.In addition, in this embodiment, light source module 300 outputs one mixed light.As shown in Figure 3, the chromaticity coordinate position of mixed light falls into target color gamut space 301, and the center in target color gamut space 301 then is preferably the target color point 303 of light source module 300 desired generation light.In other words, target color point 303 produces the chromaticity coordinate that mixed light is desired to reach for light source module 300, and target color gamut space 301 then is admissible mixed light chromaticity coordinate scope; Yet target color point 303 also can only be any coordinate points in the chrominance space, or target color gamut space 301 also can be any scope in the chrominance space.In addition, target color gamut space 301 and target color point 303 preferable all falling within the white colour gamut.The scope of each colour gamut mainly is described with the coordinate of CIE1931 chrominance space in this embodiment; Yet in different embodiment, also can use other chrominance space or can corresponding exchangeable bases measure the scope of representing each colour gamut.
As shown in Figure 2, light source module 300 comprises staggered first light source 310 and secondary light source 320.In preferred embodiment, first light source 310 is white light emitting diode with secondary light source 320, the generating white light mode of this white light emitting diode can be a lot of methods, blue chip collocation gold-tinted fluorescent powder for example, or blue chip collocation green light fluorescent powder and red light fluorescent powder, but not as limit, the white light emitting diode of any generating white light mode all belongs to this scope.As shown in Figure 2, first light source 310 and secondary light source 320 are arranged in a linear forming striation (light bar), and first light source 310 and secondary light source 320 distribute along the lateral margin of optical sheet 100, make light source module 300 be adjacent to the lateral margin of optical sheet 100.In addition, each first light source 310 is arranged at 320 of adjacent secondary light sources, and first light source 310 and secondary light source 320 are provided with at interval.In other words, the light that the light that each first light source 310 sends can send with adjacent secondary light source 320 mixes, to produce mixed light.Wherein first light source 310 more can be staggered with secondary light source 320 and form area source, and then forms the backlight module of straight-down negative.
As shown in Figure 3, the chromaticity coordinate position 311 of first light source 310 output light falls within first color gamut space 510 on the chromaticity coordinate plane.In other words, first light source 310 is selected from chromaticity coordinate position 311 and falls within light source in first color gamut space 510.First color gamut space 510 is less than or equal to 0.02 regional extent for breadth extreme on the chromaticity coordinate.In the embodiment shown in fig. 3, first color gamut space 510 is less than or equal to 0.01 round zone for radius; Yet in different embodiment, first color gamut space 510 also can have other shape, or radius is changed into other numerical value.First color gamut space 510 is preferably and drops in the white colour gamut, and not overlapping with target color gamut space 301, but not as limit.
The chromaticity coordinate position 321 of secondary light source 320 output light falls within second color gamut space 520 on the chromaticity coordinate plane.In other words, secondary light source 320 is selected from chromaticity coordinate position 321 and falls within light source in second color gamut space 520.Second color gamut space 520 is less than or equal to 0.02 regional extent for breadth extreme on the chromaticity coordinate.In the embodiment shown in fig. 3, second color gamut space 520 is less than or equal to 0.01 round zone for radius; Yet in different embodiment, second color gamut space 520 also can have other shape, or radius is changed into other numerical value.Second color gamut space 520 is preferably and drops in the white colour gamut, and not overlapping with target color gamut space 301, but not as limit.
As shown in Figure 3, first color gamut space 510 is with respect to target color gamut space 301 and second color gamut space, 520 symmetries; In other words, target color gamut space 301 is positioned at the centre position of first color gamut space 510 and second color gamut space 520.By this design, the light that the light that first light source 310 produces and secondary light source 320 produce is in the mixed light that mixes generation, and its chromaticity coordinate promptly can fall in the target color gamut space 301.Therefore the mixed light of light source module 300 generations can meet the demand in the design.In addition, the center 511 of first color gamut space 510 is with respect to center 521 symmetries of the target color point 303 and second color gamut space 520.By this relation, can rationally set the relative position of first color gamut space 510 and second color gamut space 520.
In the embodiment shown in fig. 4, each first light source 310 all is arranged between adjacent first light source 310 and secondary light source 320.In other words, the both sides of each first light source 310 are provided with first light source 310 and secondary light source 320 respectively.As shown in Figure 4, first light source 310 is provided with in pairs, and secondary light source 320 also is to be provided with in pairs.That is promptly continue behind per two first light sources 310 two secondary light sources 320 are set, the rest may be inferred.In this embodiment,, therefore still can reach the effect of filling part mixed light because a side of each first light source 310 all has a secondary light source 320.
In the embodiment shown in Fig. 5 a, a plurality of first light sources 310 are arranged with the ranks form with secondary light source 320 and are formed a matrix to become area source.In this embodiment, optical sheet 100 is arranged on first light source 310 and the secondary light source 320 formed light source modules 300, makes light source module 300 be adjacent to the bottom surface of optical sheet 100 and is positioned at the below, bottom surface.This moment, this surface that is positioned at optical sheet 100 bottom surfaces was incidence surface, and the light of first light source 310 and secondary light source 320 generations is from the bottom surface of optical sheet beam incident optical plate.Optical sheet 100 preferable diffuser plate, lens type bright enhancement film, the reflective bright enhancement films etc. of comprising.
Shown in Fig. 5 a, to arrange or be listed as in the arrangement at the row of matrix, each first light source 310 is arranged at 320 of adjacent two secondary light sources, to reach the effect of filling part mixed light.Yet in different embodiment, shown in Fig. 5 b, also can arrange or during row arrange, make each first light source 310 be arranged at 320 of adjacent first light source 310 and secondary light sources at the row of matrix.In other words, first light source 310 is provided with in pairs, and secondary light source 320 also is to be provided with in pairs; Promptly continue behind per two first light sources 310 two secondary light sources 320 are set, the rest may be inferred.In this embodiment,, therefore still can reach the effect of filling part mixed light because a side of each first light source 310 all has a secondary light source 320.In addition, first light source 310 also can be adopted random number way formation with the arrangement of secondary light source 310.Figure 6 shows that the embodiment process flow diagram of backlight module manufacture method of the present invention.Step 1510 comprises the target color gamut space that decision light source module output mixed light falls into.The requirement of the visual product specification of decision in this target color gamut space and adjusting is to meet the actual demand of product.In preferred embodiment, this step can determine a target color point earlier; That is the target color point of the desired generation light of light source module, for example (0.313,0.329) or (0.28,0.288); Then expand outwardly from target color point with a default radius again and form the target color gamut space.This radius is preferably 0.01, but also can increase to 0.03 or change into other numerical value.In addition, target color point also can be any coordinate points in the chrominance space, or the target color gamut space also can only be any single-wide in the chrominance space.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (25)
1. a light source module supplies output one mixed light, and the chromaticity coordinate of this mixed light falls into a target color gamut space, it is characterized in that, this light source module comprises:
A plurality of first light sources, wherein the chromaticity coordinate position of these a plurality of first light sources output light falls within one first color gamut space on the chromaticity coordinate plane, and this first color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space; And
A plurality of secondary light sources are staggered with these a plurality of first light sources; Wherein the chromaticity coordinate position of these a plurality of secondary light sources output light falls within one second color gamut space on the chromaticity coordinate plane, this second color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space, and this first color gamut space is this target color gamut space and this second color gamut space symmetry relatively;
This first color gamut space and this second color gamut space are respectively radius and are less than or equal to 0.01 border circular areas.
2. light source module as claimed in claim 1 is characterized in that, a plurality of these first light sources and a plurality of this secondary light source are arranged in a linear.
3. light source module as claimed in claim 2 is characterized in that, each first light source is arranged between adjacent two secondary light sources.
4. light source module as claimed in claim 2 is characterized in that, each first light source is arranged between adjacent this first light source and this secondary light source.
5. light source module as claimed in claim 1 is characterized in that, a plurality of these first light sources and a plurality of this secondary light source are arranged with the ranks form and formed a matrix.
6. light source module as claimed in claim 5 is characterized in that, arranges or is listed as in the arrangement at the row of this matrix, and each first light source is arranged between adjacent two secondary light sources.
7. light source module as claimed in claim 5 is characterized in that, arranges or is listed as in the arrangement at the row of this matrix, and each first light source is arranged between adjacent this first light source and this secondary light source.
8. light source module as claimed in claim 1 is characterized in that, this target color gamut space has a target color point, the center symmetry of relative this target color point in the center of this first color gamut space and this second color gamut space.
9. a backlight module is characterized in that, comprises:
One light source module is exported a mixed light, and the chromaticity coordinate of this mixed light falls into a target color gamut space, and this light source module comprises:
A plurality of first light sources, wherein the chromaticity coordinate position of these a plurality of first light sources output light falls within one first color gamut space on the chromaticity coordinate plane, and this first color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space; And
A plurality of secondary light sources are staggered with these a plurality of first light sources; It is characterized in that, the chromaticity coordinate position of these a plurality of secondary light sources output light falls within one second color gamut space on the chromaticity coordinate plane, this second color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space, and this first color gamut space is this target color gamut space and this second color gamut space symmetry relatively; And
One optical sheet, this light source module are arranged at an incidence surface of this optical sheet; Wherein this light source module produces light and is incident to this incidence surface;
This first color gamut space and this second color gamut space are respectively radius and are less than or equal to 0.01 border circular areas.
10. backlight module as claimed in claim 9 is characterized in that, this incidence surface is a lateral margin of this optical sheet, and this light source module setting is adjacent to this lateral margin of this optical sheet.
11. backlight module as claimed in claim 10 is characterized in that, a plurality of these first light sources and a plurality of this secondary light source are arranged in a linear.
12. backlight module as claimed in claim 11 is characterized in that, each first light source is arranged between adjacent two secondary light sources.
13. backlight module as claimed in claim 11 is characterized in that, each first light source is arranged between adjacent this first light source and this secondary light source.
14. backlight module as claimed in claim 9 is characterized in that, this incidence surface is positioned at this optical sheet one surface, and the surface of this optical sheet is positioned on this light source module.
15. backlight module as claimed in claim 14 is characterized in that, a plurality of these first light sources are arranged with the ranks form with this secondary light source of plural number and are formed a matrix.
16. backlight module as claimed in claim 15 is characterized in that, arranges or is listed as in the arrangement at the row of this matrix, each first light source is arranged between adjacent two secondary light sources.
17. backlight module as claimed in claim 15 is characterized in that, arranges or is listed as in the arrangement at the row of this matrix, each first light source is arranged between adjacent this first light source and this secondary light source.
18. backlight module as claimed in claim 9 is characterized in that, this target color gamut space has a target color point, the center symmetry of relative this target color point in the center of this first color gamut space and this second color gamut space.
19. the manufacture method of a light source module is characterized in that, comprises the following step:
Stipulate this light source module and export a target color gamut of a mixed light:
Select a plurality of first light sources, the chromaticity coordinate position of these a plurality of first light sources output light is fallen within one first color gamut space on the chromaticity coordinate plane; Wherein, this first color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space;
Select a plurality of secondary light sources, the chromaticity coordinate position of these a plurality of secondary light sources output light is fallen within one second color gamut space on the chromaticity coordinate plane; Wherein, this second color gamut space is that breadth extreme is less than or equal to 0.02 scope in the CIE1931 chrominance space, and relative this target color gamut space of this first color gamut space and this second color gamut space symmetry; And
A plurality of these first light sources and a plurality of this secondary light source are staggered;
This first color gamut space and this second color gamut space are respectively radius and are less than or equal to 0.01 border circular areas.
20. manufacture method as claimed in claim 19 is characterized in that, this alignment step comprises with linear fashion and is staggered a plurality of these first light sources and a plurality of this secondary light source to form a striation (light bar).
21. manufacture method as claimed in claim 20 is characterized in that, this line spread step comprises is arranged between adjacent two secondary light sources each first light source.
22. manufacture method as claimed in claim 20 is characterized in that, this line spread step comprises is arranged between adjacent this first light source and this secondary light source each first light source.
23. manufacture method as claimed in claim 19 is characterized in that, this target color gamut space is stipulated step and is comprised the following step:
Stipulate a target color point;
Chromaticity coordinate from this target color point expands outwardly this target color gamut space of formation with radius 0.01.
24. manufacture method as claimed in claim 23 is characterized in that, this first light source is selected step and is comprised the following step:
Selected one first center; And
Chromaticity coordinate from this first center expands outwardly with radius 0.01 and forms this first color gamut space.
25. manufacture method as claimed in claim 24 is characterized in that, this secondary light source is selected step and is comprised the following step:
Selected one second center; Relatively this target color point and this first center symmetry of this second center wherein;
Chromaticity coordinate from this second center expands outwardly with radius 0.01 and forms this second color gamut space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101613892A CN101363577B (en) | 2008-09-25 | 2008-09-25 | Backlight module using combined light source module and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101613892A CN101363577B (en) | 2008-09-25 | 2008-09-25 | Backlight module using combined light source module and method for manufacturing same |
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| Publication Number | Publication Date |
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| CN101363577A CN101363577A (en) | 2009-02-11 |
| CN101363577B true CN101363577B (en) | 2011-05-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| BRPI1013537A2 (en) * | 2009-06-15 | 2016-04-12 | Sharp Kk | lighting device, display device and television receiver |
| CN102269390B (en) * | 2010-06-04 | 2013-04-03 | 北京吉乐电子集团有限公司 | Design method of LED (light emitting diode) backlight module |
| CN102072439B (en) * | 2010-11-05 | 2012-11-21 | 深圳市华星光电技术有限公司 | Light source module and backlight device |
| CN106019705A (en) * | 2016-06-15 | 2016-10-12 | 芜湖聚飞光电科技有限公司 | Direct type backlight bar set, manufacturing method thereof, spliced screen unit and spliced screen |
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