CN101303475A - LED backlight module and LCD using the same - Google Patents
LED backlight module and LCD using the same Download PDFInfo
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- CN101303475A CN101303475A CNA2007101028080A CN200710102808A CN101303475A CN 101303475 A CN101303475 A CN 101303475A CN A2007101028080 A CNA2007101028080 A CN A2007101028080A CN 200710102808 A CN200710102808 A CN 200710102808A CN 101303475 A CN101303475 A CN 101303475A
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Abstract
The invention discloses a light emitting diode (LED) backlight module and a liquid crystal display (LCD) using the LED backlight module. The LED backlight module of the invention at least comprises a back board, a first LED light-emitting unit arranged on the back board, a second LED light-emitting unit and an optical diaphragm group; the first LED light-emitting unit at least comprises a plurality of first LED tube cores, at least has two different colors and has a first light-emitting brightness and a first light-emitting chromaticity; the second LED light-emitting unit is arranged in the back board, at least comprises a plurality of second LED tube cores, at least has two different colors and has a second light-emitting brightness and a second light-emitting chromaticity, wherein, the first light-emitting chromaticity and the second light-emitting chromaticity belong to a presetting range of light-emitting chromaticity, the first light-emitting brightness and the second light-emitting brightness are essentially different from each other; the optical diaphragm group is arranged on the first LED light-emitting unit and the second LED light-emitting unit.
Description
Technical field
The present invention relates to a kind of backlight module, and be particularly related to a kind of light emitting diode (LED) backlight module and use its LCD.
Background technology
Existing backlight liquid crystal display module mostly adopts cold-cathode tube (CCFL) to be used as light source.Because cold-cathode tube has advantages such as ripe development and low price, and widely adopt in the market.Yet, cold-cathode tube but have color rendering (Color Rendering) not good, need high drive, mercurous (Hg) and be unfavorable for that environmental protection, luminous frequency spectrum contain ultraviolet light (UV) wave band, toggle speed is slow, fluorescent tube is easily cracked and colourity control such as is difficult at problem.Therefore, seeking of new light sources becomes one of considerable problem in the Development of New Generation LCD backlight system.
Over past ten years, because the luminescence efficiency of light emitting diode has breakthrough progress, but add that light emitting diode has that high color rendering, low driving voltage, no mercury, luminous frequency spectrum do not contain that ultraviolet light wave band, fast lighting start, solid encapsulation is not easily broken and advantage such as dynamic regulation colourity, thereby be regarded as one of preferred selection of new light source from generation to generation.
Yet epitaxy technique is adopted in the making of LED core, and its technology is quite complicated, thereby produced LED core can't show consistent photoelectric characteristic on same wafer, for example equal difference to some extent such as brightness or wavelength.Therefore, LED core manufacturer is after extension is finished, the LED core of different optical specification can be distinguished, the differentiation specification limit (bin) that just is commonly called as, and then the LED core of the specification limit that is fit to is offered the client according to customer demand.Therefore, have between the quantity of the unit price of LED core and the specification limit of purchase very big related.If requirement specification is loose, contain bigger specification limit, price will be relatively cheap; But if requirement specification is only contained the LED core of unique small dimension scope, for example certain luminance or wavelength, its price will be very expensive.In addition, in case when the demand of the light emitting diode of this specific small dimension scope enlarges, more necessaryly come in response to, the therefore problem that not only has cost to marry again, more do not have a production with huge production capacity.
In the backlight module design of existing use RGB (RGB) light emitting diode,, usually each primary colors LED core such as red, green, blue is encapsulated in the same packaging body in order effectively to shorten light mixing distance.In such design, the distance between each primary colors LED core can be reduced to minimum, thereby can be in the shortest distance the light of each primary colors fully be mixed into required white light.Because light mixing distance can obtain to shorten, therefore can effectively reduce the thickness (straight-down negative) or the width (side incident type) of backlight module.
Yet, such packaged type can make that the interdependency between the luminous disome tube core of each primary colors in the same packaging body is higher, in case the brightness of certain primary colors LED core is morphed in the packaging body, and make each primary colors, red, green, blue for example, between brightness ratio when changing, the white light colourity that whole packaging body sent promptly produces skew.For example, if the luminance shortage of red light emitting diodes tube core, the light that whole packaging body sent can present bluish-green tone; And if green LED tube core too dark brightness, then the light that whole packaging body sent can present violet hue.
Backlight module produces the display surface that makes backlight module the color lump of irregular colour if use the LED encapsulation body of colourity inequality.Take place for fear of this phenomenon, in backlight module, the brightness specifications of each primary colors LED core must be limited in the narrow and small scope, for example ± 3%, so could determine that the brightness between each interior primary colors of formed LED encapsulation body remains on certain proportion so that each light emitting diode adorn body maintain certain chromatic value in.
Yet, the brightness specifications of each primary colors LED core is limited in the narrow and small scope, can cause the expensive problem of LED core of previous described narrow and small specification limit.But, if with each primary colors, for example the brightness specifications of red, green, blue look LED core is loosened in the acceptable cost scope, the result that mixed red, green, blue look LED core of taking encapsulates will have quite low yield rate in acceptable white color metric lattice, that is to say that the colourity after most LED encapsulation body mixed light comes out all falls short of specifications.
Therefore, though many primary colors LED package mode is in the backlight module design, advantages such as the mixed light effect is good, optical design is simple are arranged, but hang down yield rate and learn expensive that small dimension caused, make many primary colors LED package mode in the backlight module design, still lack competitiveness.
Summary of the invention
Therefore, purpose of the present invention is providing a kind of light-emitting diode (LED) backlight module exactly, the LED core of all kinds that its brightness ratio that will organize different colours meets a default brightness ratio scope more is packaged into the lumination of light emitting diode unit respectively, thus, the colourity of each lumination of light emitting diode unit that the LED core of every group of different colours is formed can maintain in the visually-acceptable scope, and then can make the colourity unanimity of whole backlight module.Therefore, can under the colourity of taking into account backlight module was all once requiring, enlarge the brightness specifications scope of selected LED core of all kinds, and obtain the benefit on the cost.
Another object of the present invention is that a kind of light-emitting diode (LED) backlight module is being provided, its luminescence unit can adopt the LED core with wide brightness specifications scope on batch wafer, therefore can significantly promote utilization rate, have production with the LED core on a collection of wafer.
Another purpose of the present invention is that a kind of LCD is being provided, and the cost of its light-emitting diode (LED) backlight module is cheap relatively, and production is good, and therefore LCD of the present invention has high economic benefit, has the market competitiveness.
Above-mentioned purpose according to the present invention proposes a kind of light-emitting diode (LED) backlight module, and being applicable to provides a display panels light source, and this light-emitting diode (LED) backlight module comprises at least: backboard; The first lumination of light emitting diode unit, be located on the backboard, and the first lumination of light emitting diode unit comprises a plurality of first LED core at least, wherein these first LED core comprise different dichromatisms at least, and make the first lumination of light emitting diode unit have first luminosity and first luminescent chromaticity by the mixed light of these first LED core; The second lumination of light emitting diode unit, be located in the backboard, and this second lumination of light emitting diode unit comprises a plurality of second LED core at least, wherein these second LED core comprise different dichromatisms at least, and the mixed light by these second LED core makes the second lumination of light emitting diode unit have second luminosity and second luminescent chromaticity, wherein first luminescent chromaticity and second luminescent chromaticity belong to a default luminescent chromaticity scope, and first luminosity is different in essence in second luminosity; And optical diaphragm group, be located on the first lumination of light emitting diode unit and the second lumination of light emitting diode unit.
According to one embodiment of the present invention, the first above-mentioned LED core and second LED core are formed by a blue LED tube core, a green LED tube core and a red light emitting diodes tube core, and the brightness ratio of the blueness of first LED core, green and red light emitting diodes tube core equates with the brightness ratio essence of blueness, green and the red light emitting diodes tube core of second LED core.
According to purpose of the present invention, a kind of LCD is proposed, comprise that at least light-emitting diode (LED) backlight module and display panels be located on the light-emitting diode (LED) backlight module.This light-emitting diode (LED) backlight module comprises at least: backboard; The first lumination of light emitting diode unit, be located on the backboard, and this first lumination of light emitting diode unit comprises a plurality of first LED core at least, wherein these first LED core comprise different dichromatisms at least, and make the first lumination of light emitting diode unit have first luminosity and first luminescent chromaticity by the mixed light of these first LED core; The second lumination of light emitting diode unit, be located in the backboard, and this second lumination of light emitting diode unit comprises a plurality of second LED core at least, wherein these second LED core comprise different dichromatisms at least, and the mixed light by these second LED core makes the second lumination of light emitting diode unit have second luminosity and second luminescent chromaticity, wherein first luminescent chromaticity and second luminescent chromaticity belong to a default luminescent chromaticity scope, and first luminosity is different in essence in second luminosity; And optical diaphragm group, be located on the first lumination of light emitting diode unit and the second lumination of light emitting diode unit.
According to one embodiment of the present invention, the first above-mentioned luminescent chromaticity and the difference of second luminescent chromaticity are less than 10/1000ths.
Description of drawings
Fig. 1 is the combination synoptic diagram that illustrates in a kind of lumination of light emitting diode unit.
Fig. 2 is the combination synoptic diagram that illustrates according in a kind of lumination of light emitting diode unit of one embodiment of the present invention.
Fig. 3 is the schematic top plan view that illustrates according to a kind of light-emitting diode (LED) backlight module of one embodiment of the present invention.
Fig. 4 is the schematic top plan view that illustrates according to a kind of light-emitting diode (LED) backlight module of another preferred embodiment of the present invention.
Fig. 5 is the device synoptic diagram that illustrates according to a kind of LCD of one embodiment of the present invention.
Description of reference numerals
100: light-emitting diode (LED) backlight module
102: backboard 104: light source module
106: optical diaphragm group
200: light-emitting diode (LED) backlight module 202: backboard
204: light guide plate 300: LCD
302: display panels
B1: blue LED tube core B2: blue LED tube core
B3: blue LED tube core B4: blue LED tube core
B5: blue LED tube core G1: green LED tube core
G2: green LED tube core G3: green LED tube core
G4: green LED tube core G5: green LED tube core
R1: red light emitting diodes tube core R2: red light emitting diodes tube core
R3: red light emitting diodes tube core R4: red light emitting diodes tube core
R5: red light emitting diodes tube core Lamp1: lumination of light emitting diode unit
Lamp2: lumination of light emitting diode unit Lamp3: lumination of light emitting diode unit
Lamp4: lumination of light emitting diode unit Lamp5: lumination of light emitting diode unit
Embodiment
The present invention discloses a kind of light-emitting diode (LED) backlight module and application thereof, can be under the consistance of the colourity of taking into account the lumination of light emitting diode unit, enlarge the brightness specifications scope of available LED core, therefore can significantly improve utilization rate, and can effectively reduce cost with the LED core on batch wafer.In order to make narration of the present invention more detailed and complete, can be with reference to the diagram of following description and cooperation Fig. 1 to Fig. 5.
Adopt in the design of light emitting diode as the backlight module of light source general, take place for fear of phenomenons such as irregular colour and colourity drifts, must be with each primary colors, brightness specifications for example red, green and the blue LED tube core is limited in the narrow and small scope, for example ± 3% in.In addition, desire to make each the primary colors LED core mixed light in the packaging body and send the light of required colourity, the brightness ratio of certain limit must be arranged between each primary colors LED core.For example, as shown in Figure 1, the brightness of blue LED tube core B3 belongs to 730mcd～775mcd (752 ± 3%mcd) specification limits, the brightness of green LED tube core G3 belongs to 3150mcd～3340mcd, and (3245 ± 3%mcd) specification limits, the brightness of red light emitting diodes tube core R3 belongs to 1855mcd～1965mcd (1910 ± 3%mcd) specification limits.When blue LED tube core B3, green LED tube core G3 and red light emitting diodes tube core R3 are packaged together, formed lumination of light emitting diode unit Lamp3, colourity of blueness, green and red light emitting diodes tube core B3, G3 and the formed white light of R3 mixed light can maintain in the default chromaticity range in it, that is visually-acceptable chromaticity range.
In the present invention, in order further to enlarge the brightness specifications scope of the LED core that light-emitting diode (LED) backlight module adopted, for example expand to more than ± 15% the brightness specifications scope from ± 3% brightness specifications scope, and utilize the mode of the brightness ratio between the LED core of all kinds in each packaging body of control, take into account the expansion of the specification limit of the homogeneity of colourity of each lumination of light emitting diode unit and LED core.
Please in the lump with reference to Fig. 2 and Fig. 3, wherein Fig. 2 illustrates according to the combination synoptic diagram in a kind of lumination of light emitting diode unit of one embodiment of the present invention, and Fig. 3 illustrates the schematic top plan view according to a kind of light-emitting diode (LED) backlight module of one embodiment of the present invention.Light-emitting diode (LED) backlight module 100 mainly is made of backboard 102, light source module 104 and optical diaphragm group (not illustrating), and wherein light source module 104 is located on the bottom surface of backboard 102, and optical diaphragm group then is located at the top of light source module 104, as shown in Figure 3.Therefore, the light-emitting diode (LED) backlight module 100 of present embodiment belongs to a kind of direct type backlight module.Light-emitting diode (LED) backlight module 100 is applicable to liquid crystal indicator.For clearly demonstrating the design of light source module 104, in Fig. 3, do not show the optical diaphragm group of being located on the light source module 104, but can be with reference to the optical diaphragm group 106 of Fig. 5.Generally speaking, optical diaphragm group 106 can comprise blooming pieces such as diffusing panel and brightness enhancement film.
In the present embodiment, the light source module 104 of light-emitting diode (LED) backlight module 100 can adopt lumination of light emitting diode unit Lamp1, Lamp2, Lamp3, Lamp4 and Lamp5 shown in Figure 2, and wherein each lumination of light emitting diode unit Lamp1, Lamp2, Lamp3, Lamp4 and Lamp5 include the three primary colors LED core.Comprise blue LED tube core B3, the green LED tube core G3 and the red light emitting diodes tube core R3 that drop on original brightness specifications scope in the packaging body of lumination of light emitting diode unit Lamp3.The brightness specifications scope of each primary colors LED core that lumination of light emitting diode unit Lamp1 and the packaging body of Lamp2 are included respectively than the brightness specifications scope of each primary colors LED core of lumination of light emitting diode unit Lamp3 low two with a brightness specifications scope, wherein each brightness specifications scope is ± 3%.On the other hand, the brightness specifications scope of each primary colors LED core that lumination of light emitting diode unit Lamp4 and the packaging body of Lamp5 are included respectively than the brightness specifications scope of each primary colors LED core of lumination of light emitting diode unit Lamp3 high one with two brightness specifications scopes, wherein each brightness specifications scope be similarly ± 3%.
In the present embodiment, as shown in Figure 2, lumination of light emitting diode unit Lamp1 comprises blue LED tube core B1, green LED tube core G1 and red light emitting diodes tube core R1, wherein the brightness specifications scope of blue LED tube core B1 drops on 650mcd～690mcd (670 ± 3%mcd) specification limits, the brightness specifications scope of green LED tube core G1 drops on 2800mcd～2970mcd, and (2885 ± 3%mcd) specification limits, the brightness specifications scope of red light emitting diodes tube core R1 drops on 1650mcd～1750mcd (1700 ± 3%mcd) specification limits.Lumination of light emitting diode unit Lamp2 comprises blue LED tube core B2, green LED tube core G2 and red light emitting diodes tube core R2, wherein the brightness specifications scope of blue LED tube core B2 drops on 690mcd～730mcd (710 ± 3%mcd) specification limits, the brightness specifications scope of green LED tube core G2 drops on 2970mcd～3150mcd, and (3060 ± 3%mcd) specification limits, the brightness specifications scope of red light emitting diodes tube core R2 drops on 1750mcd～1855mcd (1802 ± 3%mcd) specification limits.Lumination of light emitting diode unit Lamp4 comprises blue LED tube core B4, green LED tube core G4 and red light emitting diodes tube core R4, wherein the brightness specifications scope of blue LED tube core B4 drops on 775mcd～820mcd (797 ± 3%mcd) specification limits, the brightness specifications scope of green LED tube core G4 drops on 3340mcd～3540mcd, and (3440 ± 3%mcd) specification limits, the brightness specifications scope of red light emitting diodes tube core R4 drops on 1965mcd～2080mcd (2022 ± 3%mcd) specification limits.Lumination of light emitting diode unit Lamp5 comprises blue LED tube core B5, green LED tube core G5 and red light emitting diodes tube core R5, wherein the brightness specifications scope of blue LED tube core B5 drops on 820mcd～870mcd (845 ± 3%mcd) specification limits, the brightness specifications scope of green LED tube core G5 drops on 3540mcd～3750mcd, and (3645 ± 3%mcd) specification limits, the brightness specifications scope of red light emitting diodes tube core R5 drops on 2080mcd～2205mcd (2142 ± 3%mcd) specification limits.
By regularly brightness ratio being dropped on the blue LED tube core B1 in the predetermined luminance proportional range, green LED tube core G1 and red light emitting diodes tube core R1 encapsulate and formation lumination of light emitting diode unit Lamp1, blue LED tube core B2, green LED tube core G2 and red light emitting diodes tube core R2 encapsulate and formation lumination of light emitting diode unit Lamp2, blue LED tube core B3, green LED tube core G3 and red light emitting diodes tube core R3 encapsulate and formation lumination of light emitting diode unit Lamp3, blue LED tube core B4, green LED tube core G4 and red light emitting diodes tube core R4 encapsulate and formation lumination of light emitting diode unit Lamp4, blue LED tube core B5, green LED tube core G5 and red light emitting diodes tube core R5 encapsulate and formation lumination of light emitting diode unit Lamp5, thus, each lumination of light emitting diode unit Lamp1, Lamp2, Lamp3, the light that each primary colors LED core in Lamp4 and the Lamp5 is sent behind mixed light can drop in the default luminescent chromaticity scope, for example white light.In a preferred embodiment of the present invention, the equal essence of brightness ratio of each the primary colors LED core among lumination of light emitting diode unit Lamp1～Lamp5 equates.Therefore, in the present embodiment, not only the brightness specifications scope of 100 LED core that can adopt of light-emitting diode (LED) backlight module can be expanded to ± 15% from ± 3%, significantly improve utilization rate, more can take into account the homogeneity of the whole colourity of light-emitting diode (LED) backlight module 100 with the tube core on batch wafer.In the present invention, the difference of the luminescent chromaticity between all lumination of light emitting diode unit of light-emitting diode (LED) backlight module is controlled at less than 10 of essence thousand minutes.
Because the specification limit of the LED core brightness of all kinds in lumination of light emitting diode unit Lamp1 and the Lamp2 is than the LED core brightness of all kinds in the lumination of light emitting diode unit Lamp3 low respectively two and a specification limit, and the specification limit of the LED core brightness of all kinds in lumination of light emitting diode unit Lamp4 and the Lamp5 is than the LED core brightness of all kinds in the lumination of light emitting diode unit Lamp3 high respectively one and two specification limits, therefore the luminosity of lumination of light emitting diode unit Lamp1～Lamp5 is in fact all inequality, and the brightness of the brightness of the brightness of the brightness of the brightness of lumination of light emitting diode unit Lamp5＞lumination of light emitting diode unit Lamp4＞lumination of light emitting diode unit Lamp3＞lumination of light emitting diode unit Lamp2＞lumination of light emitting diode unit Lamp1.
In the light source module 104 of light-emitting diode (LED) backlight module 100, lumination of light emitting diode unit Lamp1～Lamp5 can arrange setting according to product demand, for example arranges towards the periphery from the central authorities of light-emitting diode (LED) backlight module 100 according to the brightness height of lumination of light emitting diode unit Lamp1～Lamp5.
Though in the above-described embodiments, each lumination of light emitting diode unit all has a blue LED tube core, a green LED tube core and a red light emitting diodes tube core, yet, in other embodiments of the invention, but can only comprise that two mixed lights become the not homochromy LED core of required colourity in a lumination of light emitting diode unit; Also can comprise that but mixed light more than three becomes the LED core of required colourity, wherein this LED core more than three need comprise dichromatism at least, and that these LED core can adhere to separately is not homochromy, also can have two above LED core to belong to of the same colour, only needs scale dimension between the total brightness of not homochromy LED core to be held in the default brightness ratio scope and gets final product.For example, can comprise a blue LED tube core, two green LED tube cores and a red light emitting diodes tube core in the lumination of light emitting diode unit, but and the total brightness of the brightness of blue LED tube core, two green LED tube cores, and the brightness of red light emitting diodes tube core between brightness ratio drop in the default brightness ratio scope of light that mixed light becomes required colourity.
LED light-source module of the present invention is also applicable to side incident type backlight module.Please refer to Fig. 4, it illustrates the vertical view synoptic diagram according to a kind of light-emitting diode (LED) backlight module of another preferred embodiment of the present invention.200 1 kinds of side incident types of light-emitting diode (LED) backlight module backlight module, this light-emitting diode (LED) backlight module 200 mainly comprises the light source that backboard 202, light source module 104 are constituted and is positioned at light guide plate 204 on the backboard 202, wherein light guide plate 204 have the position on backboard 202 the bottom surface and in abutting connection with the incidence surface of this bottom surface, the lumination of light emitting diode unit of light source module 104 then is adjacent to the incidence surface of light guide plate 204, and light source module 104 is between backboard 202 and light guide plate 204.In addition, more can optical diaphragm group (not illustrating) optionally be set on light guide plate 204, to promote the optical performance of light-emitting diode (LED) backlight module 200 according to the product actual demand.Light-emitting diode (LED) backlight module 200 of the present invention is equally applicable to LCD.Generally speaking, optical diaphragm group can comprise blooming pieces such as diffusing panel and brightness enhancement film.
Light-emitting diode (LED) backlight module of the present invention can be applicable on the consumer products such as various information and communication.For example, a display panels can be set on light-emitting diode (LED) backlight module, can constitute liquid crystal indicator.For example, please refer to Fig. 5, it illustrates the device synoptic diagram according to a kind of LCD of one embodiment of the present invention.LCD 300 mainly comprises display panels 302 and light-emitting diode (LED) backlight module, for example the light-emitting diode (LED) backlight module shown in the 3rd figure 100.Wherein, display panels 302 is arranged on the optical diaphragm group 106 of light-emitting diode (LED) backlight module 100.Then be provided with above-mentioned LED light-source module 104 on the backboard 102 of light-emitting diode (LED) backlight module 100, to provide display panels 302 backlights.
By the invention described above preferred embodiment as can be known, an advantage of the present invention is exactly to be packaged into a lumination of light emitting diode unit respectively because the brightness ratio that light-emitting diode (LED) backlight module of the present invention will be organized different colours more meets the LED core of all kinds of a default brightness ratio scope, the colourity of each lumination of light emitting diode unit that the LED core of every group of different colours forms is maintained in the visually-acceptable scope, and then can make the colourity unanimity of whole backlight module.Therefore, can under the colourity of taking into account backlight module was all once requiring, enlarge the brightness specifications scope of selected LED core of all kinds, and obtain the benefit on the cost.
By the invention described above preferred embodiment as can be known, another advantage of the present invention is exactly because the luminescence unit of light-emitting diode (LED) backlight module of the present invention can adopt the LED core with wide brightness specifications scope on batch wafer, therefore can significantly promote utilization rate, have production with the LED core on a collection of wafer.
By the invention described above preferred embodiment as can be known, another advantage of the present invention is exactly because the cost of the light-emitting diode (LED) backlight module of a kind of LCD of the present invention is cheap relatively, and production is good, therefore can improve the economic benefit of LCD of the present invention widely, have the market competitiveness.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skill in this technical field; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (10)
1. light-emitting diode (LED) backlight module, being applicable to provides a display panels light source, and this light-emitting diode (LED) backlight module comprises at least:
Backboard;
The first lumination of light emitting diode unit, be located on this backboard, and this first lumination of light emitting diode unit comprises a plurality of first LED core at least, wherein these first LED core comprise different dichromatisms at least, and make this first lumination of light emitting diode unit have first luminosity and first luminescent chromaticity by the mixed light of these first LED core;
The second lumination of light emitting diode unit, be located in this backboard, and this second lumination of light emitting diode unit comprises a plurality of second LED core at least, wherein these second LED core comprise different dichromatisms at least, and the mixed light by these second LED core makes this second lumination of light emitting diode unit have second luminosity and second luminescent chromaticity, wherein this first luminescent chromaticity and this second luminescent chromaticity belong to a default luminescent chromaticity scope, and this first luminosity is different in essence in this second luminosity; And
Optical diaphragm group is located on this first lumination of light emitting diode unit and this second lumination of light emitting diode unit.
2. light-emitting diode (LED) backlight module as claimed in claim 1, wherein not homochromy real-valued equating of brightness ratio of not homochromy brightness ratio of these first LED core and these second LED core.
3. light-emitting diode (LED) backlight module as claimed in claim 1, wherein these first LED core are made up of a blue LED tube core, a green LED tube core and a red light emitting diodes tube core.
4. light-emitting diode (LED) backlight module as claimed in claim 3, wherein these second LED core are made up of a blue LED tube core, a green LED tube core and a red light emitting diodes tube core.
5. LCD comprises at least:
Light-emitting diode (LED) backlight module comprises at least:
Backboard;
The first lumination of light emitting diode unit, be located on this backboard, and this first lumination of light emitting diode unit comprises a plurality of first LED core at least, wherein these first LED core comprise different dichromatisms at least, and make this first lumination of light emitting diode unit have first luminosity and first luminescent chromaticity by the mixed light of these first LED core;
The second lumination of light emitting diode unit, be located in this backboard, and this second lumination of light emitting diode unit comprises a plurality of second LED core at least, wherein these second LED core comprise different dichromatisms at least, and the mixed light by these second LED core makes this second lumination of light emitting diode unit have second luminosity and second luminescent chromaticity, wherein this first luminescent chromaticity and this second luminescent chromaticity belong to a default luminescent chromaticity scope, and this first luminosity is different in essence in this second luminosity; And
Optical diaphragm group is located on this first lumination of light emitting diode unit and this second lumination of light emitting diode unit; And
Display panels is located on this light-emitting diode (LED) backlight module.
6. LCD as claimed in claim 5, wherein not homochromy real-valued equating of brightness ratio of not homochromy brightness ratio of these first LED core and these second LED core.
7. LCD as claimed in claim 5, wherein these first LED core are made up of a blue LED tube core, a green LED tube core and a red light emitting diodes tube core.
8. LCD as claimed in claim 7, wherein these second LED core are made up of a blue LED tube core, a green LED tube core and a red light emitting diodes tube core.
9. LCD as claimed in claim 8, wherein the brightness ratio of this blue LED tube core of these first LED core, this green LED tube core and this red light emitting diodes tube core equates with the brightness ratio essence of this blue LED tube core, this green LED tube core and this red light emitting diodes tube core of these second LED core.
10. LCD as claimed in claim 5, wherein these first LED core are made up of a blue LED tube core, two green LED tube cores and a red light emitting diodes tube core.
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| CN2007101028080A CN101303475B (en) | 2007-05-09 | 2007-05-09 | LED backlight module and LCD using the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097446A (en) * | 2009-10-22 | 2011-06-15 | 夏普株式会社 | Lighting emitting device and producing method thereof |
| WO2012012959A1 (en) * | 2010-07-30 | 2012-02-02 | 深圳市华星光电技术有限公司 | Backlight module |
| CN102792467A (en) * | 2010-03-05 | 2012-11-21 | 夏普株式会社 | Light emitting device, method for manufacturing light emitting device, illuminating device, and backlight |
| CN112365814A (en) * | 2020-11-20 | 2021-02-12 | 深圳Tcl新技术有限公司 | Display device, display control method, and computer-readable storage medium |
| CN112764266A (en) * | 2020-12-31 | 2021-05-07 | 惠州视维新技术有限公司 | Backlight module, display device and detection method of display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6608614B1 (en) * | 2000-06-22 | 2003-08-19 | Rockwell Collins, Inc. | Led-based LCD backlight with extended color space |
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2007
- 2007-05-09 CN CN2007101028080A patent/CN101303475B/en active Active
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| CN102097446A (en) * | 2009-10-22 | 2011-06-15 | 夏普株式会社 | Lighting emitting device and producing method thereof |
| CN102097446B (en) * | 2009-10-22 | 2013-10-16 | 夏普株式会社 | Lighting emitting device and producing method thereof |
| CN102792467A (en) * | 2010-03-05 | 2012-11-21 | 夏普株式会社 | Light emitting device, method for manufacturing light emitting device, illuminating device, and backlight |
| CN102792467B (en) * | 2010-03-05 | 2015-06-17 | 夏普株式会社 | Light emitting device, method for manufacturing light emitting device, illuminating device, and backlight |
| WO2012012959A1 (en) * | 2010-07-30 | 2012-02-02 | 深圳市华星光电技术有限公司 | Backlight module |
| CN112365814A (en) * | 2020-11-20 | 2021-02-12 | 深圳Tcl新技术有限公司 | Display device, display control method, and computer-readable storage medium |
| CN112365814B (en) * | 2020-11-20 | 2023-06-27 | 深圳Tcl新技术有限公司 | Display device, display control method, and computer-readable storage medium |
| CN112764266A (en) * | 2020-12-31 | 2021-05-07 | 惠州视维新技术有限公司 | Backlight module, display device and detection method of display device |
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| CN101303475B (en) | 2011-06-15 |
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