CN1734328A - LED and back light module with LED - Google Patents
LED and back light module with LED Download PDFInfo
- Publication number
- CN1734328A CN1734328A CNA2004100705757A CN200410070575A CN1734328A CN 1734328 A CN1734328 A CN 1734328A CN A2004100705757 A CNA2004100705757 A CN A2004100705757A CN 200410070575 A CN200410070575 A CN 200410070575A CN 1734328 A CN1734328 A CN 1734328A
- Authority
- CN
- China
- Prior art keywords
- light
- backlight module
- direct type
- type backlight
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Liquid Crystal (AREA)
Abstract
The invention relates to a luminous diode, which consists of a blue crystal grain launching blue light and a fluorescent powder layer launching yellow light. The luminous diode comprises a red crystal grain launching red light to reinforce the luminous diode, which improves the color saturation degree by LCD display or television.
Description
Technical field
The invention relates to a kind of light emitting diode and have the backlight module of light emitting diode, particularly a kind of light emitting diode and backlight module thereof that improves color saturation.
Background technology
With reference to figure 1, show the schematic perspective view of direct type backlight module commonly used.Should comprise a plurality of fluorescent tubes 11, a diffuser plate 12, a reflecting plate 13 and a housing (housing) 14 by backlight module 1 commonly used.This backlight module 1 is arranged in the below of LCD liquid crystal board.These fluorescent tubes 11 are in order to light source to be provided.This diffuser plate 12 is arranged at the top of these fluorescent tubes 11, and the light in order to these fluorescent tubes 11 are dispersed evenly is diffused into liquid crystal board.This reflecting plate 13 is the belows that are arranged at these fluorescent tubes 11, reflexes to this diffuser plate 12 in order to the light that this fluorescent tube 11 is diffused to this backlight module 1 bottom.This housing 14 is rectangle frameworks, in order to ccontaining these fluorescent tubes 11, this diffuser plate 12 and this reflecting plate 13.These fluorescent tubes 11 are that (cold cathode fluorescent lamp, CCFL), its shortcoming is the green intensity deficiency to cathode fluorescent tube, when this backlight module 1 is applied to LCD, can influence the color representation of this display.Therefore, just have with light emitting diode and replace this cathode fluorescent tube with trend as this backlight module 1 light source.
With reference to figure 2, show light-emitting diode structure synoptic diagram commonly used.Should light emitting diode 2 commonly used comprise a blue light crystal grain 21, one bowl of seat 22 (reflector cup lead frame), two pins (1ead) 23,24, a phosphor powder layer 25 and sealing resin 26.
This blue light crystal grain 21 is a gallium nitride (GaN) crystal grain, produces blue light when it is used to be excited (activated).This bowl seat 22 is in order to accept this blue light crystal grain 21 and this phosphor powder layer 25.These pins 23,24th are electrically connected this a blue light crystal grain 21 and an extraneous power supply, so that this blue light crystal grain 21 required power supplys to be provided.This phosphor powder layer 25 comprises that (it covers on this blue light crystal grain 21 yttrium aluminum garnet for Yttrium Aluminum Garnet, YAG) fluorescent powder, produces sodium yellow when being used to be excited.This sealing resin 26 is in order to covering this blue light crystal grain 21 and this phosphor powder layer 25, and it is a transparent resin.The light that this kind light emitting diode 2 commonly used is sent is white light, and its shortcoming is the not enough uneven phenomenon of color that has of red spectrum of this white light.
With reference to figure 3, show the spectral distribution graph of light emitting diode commonly used, its measurement condition is for providing the 400mA direct current to this blue light crystal grain 21.As shown in the figure, the spectral distribution of this light emitting diode 2 comprises two spikes (peak) 31,32, and wherein this spike 31 is caused by this blue light crystal grain 21, and this spike 32 is caused by this phosphor powder layer 25.By finding out among the figure, the spectral distribution of this light emitting diode 2 is comparatively not enough in the scope (being about 647 to 700nm) of red visible light, when therefore being applied to the light source of liquid crystal display backlight module, can influence the color representation of this display.
In order to improve above-mentioned shortcoming, United States Patent (USP) the 6th, 351, disclose a kind of light emitting diode that compensates ruddiness 069 B1 number, it adds red fluorescence powder in this phosphor powder layer, the deficiency of red spectrum in the light that is sent with the reinforcement light emitting diode, however this way can cause the loss of brightness, when therefore being applied to the light source of liquid crystal display backlight module, can reduce the brightness of this display.
Therefore, be necessary to provide innovation and the light emitting diode of rich progressive and the structure of backlight module, to address the above problem.
Summary of the invention
Fundamental purpose of the present invention is to improve the not good situation of color saturation of LCD or LCD TV.
Another object of the present invention provides a light emitting diode with a blue light crystal grain and a ruddiness crystal grain to supply the deficiency of red light, when it is applied to the light source of direct type backlight module, can increase color saturation.
Another object of the present invention provides a direct type backlight module with cathode fluorescent tube and green diode to supply the deficiency of green light, when it is applied to LCD or LCD TV, can increase color saturation.
Another object of the present invention provides a direct type backlight module with white light-emitting diodes and ruddiness crystal grain to supply the deficiency of red light, when it is applied to LCD or LCD TV, can increase color saturation.
Description of drawings
Fig. 1 shows the schematic perspective view of direct type backlight module commonly used;
Fig. 2 shows light-emitting diode structure synoptic diagram commonly used;
Fig. 3 shows the spectral distribution graph of light emitting diode commonly used;
Fig. 4 shows that the present invention adopts the schematic perspective view of direct type backlight module of the light emitting diode of Fig. 2;
Fig. 5 shows the synoptic diagram of light emitting diode of the present invention;
The spectral distribution graph of Fig. 6 displayed map 5 light emitting diodes;
Fig. 7 shows that the present invention adopts the schematic perspective view of the direct type backlight module of Fig. 5 light emitting diode; And
Fig. 8 shows the schematic perspective view of another direct type backlight module of the present invention.
Embodiment
With reference to figure 4, show that the present invention adopts the schematic perspective view of direct type backlight module of the light emitting diode of Fig. 2.This backlight module 4 comprises a plurality of fluorescent tubes 41, a diffuser plate 42, a reflecting plate 43, a housing 44 and a plurality of green diode 45.This backlight module 4 can be arranged in the below of LCD liquid crystal board.These fluorescent tubes 41 are cathode fluorescent tube, in order to main light source to be provided.This diffuser plate 42 is arranged at the top of these fluorescent tubes 41, and the light in order to these fluorescent tubes 41 are dispersed evenly is diffused into liquid crystal board.This reflecting plate 43 is the belows that are arranged at these fluorescent tubes 41, reflexes to this diffuser plate 42 in order to the light that these fluorescent tubes 41 is diffused to these backlight module 4 bottoms.This housing 44 is rectangle frameworks, in order to ccontaining these fluorescent tubes 41, this diffuser plate 42 and this reflecting plate 43.The green diode of these green diodes 45 for using always, in order to the green intensity deficiency of these fluorescent tubes 41 of reinforcement, the color saturation when being applied to LCD or LCD TV to increase this backlight module 4.In the present embodiment, these green diodes 45 are graininess, yet in other was used, these green diodes 45 can be strip or other suitable form.In the present embodiment, these green diodes 45 are to be staggered with these fluorescent tubes 41, yet in other was used, these green diodes 45 also can be the peripheries that is positioned at all these fluorescent tubes 41.
With reference to figure 5, show the synoptic diagram of light emitting diode of the present invention.This light emitting diode 5 comprises a blue light crystal grain 51, one bowl of seat 52, two blue light crystal grain pins 53,54, a phosphor powder layer 55, a sealing resin 56, a ruddiness crystal grain 57 and two ruddiness crystal grain pins 58,59.
This blue light crystal grain 51 is a gallium nitride (GaN) crystal grain, produces blue light when it is used to be excited.This ruddiness crystal grain 57 is to produce the red light of wavelength coverage between 615nm～640nm when being used to be excited, and its material includes but not limited to quaternary AlGaInP (InGaAlP).This bowl seat 52 is in order to accept this blue light crystal grain 51, this ruddiness crystal grain 57 and this phosphor powder layer 55.These blue light crystal grain pins 53,54th are electrically connected this a blue light crystal grain 51 and an extraneous power supply, so that this blue light crystal grain 51 required power supplys to be provided.These ruddiness crystal grain pins 58,59th are electrically connected this a ruddiness crystal grain 57 and an extraneous power supply, so that this ruddiness crystal grain 57 required power supplys to be provided.This phosphor powder layer 55 is to comprise that (it covers this blue light crystal grain 51 and this ruddiness crystal grain 57 to yttrium aluminum garnet for YttriumAluminum Garnet, YAG) fluorescent powder, produces sodium yellow when being used to be excited.This sealing resin 56 is in order to covering this blue light crystal grain 51, this ruddiness crystal grain 57 and this phosphor powder layer 55, and it is a transparent resin.
With reference to figure 6, the spectral distribution graph of the light emitting diode of displayed map 5, its measurement condition arrives this blue light crystal grain 51 for the 400mA direct current is provided, and provides the 100mA direct current to this ruddiness crystal grain 57.As shown in the figure, the spectral distribution of this light emitting diode 5 comprises three spikes 61,62,63, and wherein this spike 61 is caused by this blue light crystal grain 51, and this spike 62 is caused by this phosphor powder layer 55.Compare with Fig. 3, many spikes 63 among this figure, its wavelength is about 640nm, and drops on the scope of red visible light, therefore can remedy the deficiency of red light in the light emitting diode commonly used.
With reference to figure 7, show that the present invention adopts the schematic perspective view of the direct type backlight module of Fig. 5 light emitting diode.This backlight module 7 comprises a plurality of light emitting diodes 5, a diffuser plate 72, a reflecting plate 73 and a housing 74.This backlight module 7 can be arranged in the below of LCD liquid crystal board.These light emitting diodes 5 are the light emitting diode 5 of second embodiment, in order to light source to be provided.This diffuser plate 72, reflecting plate 73 and housing 74 are identical with the middle diffuser plate 12 of backlight module 1 commonly used (Fig. 1), reflecting plate 13 and housing 14.Because this light emitting diode 5 has the advantage of the red light of supplying, so this backlight module 7 can make this LCD or LCD TV have color saturation preferably when being applied to LCD or LCD TV.
With reference to figure 8, show the schematic perspective view of another direct type backlight module of the present invention.This backlight module 8 comprises a plurality of white light-emitting diodess 81, a diffuser plate 82, a reflecting plate 83, a housing 84 and a plurality of red diodes 85.This backlight module 8 can be arranged in the below of LCD liquid crystal board.These white light-emitting diodess 81 are for white light-emitting diodes commonly used, in order to main light source to be provided.These red diodes 85 are red diodes commonly used, in order to remedy the deficiency of red light in the white light that these white light-emitting diodess 81 are sent.This diffuser plate 82, reflecting plate 83 and housing 84 are identical with the middle diffuser plate 12 of backlight module 1 commonly used (Fig. 1), reflecting plate 13 and housing 14.Owing to added these red diodes 85 in the present embodiment supplying red light, so this backlight module 8 can make this LCD or LCD TV have color saturation preferably when being applied to LCD or LCD TV.In the present embodiment, these red diodes 85 are to be staggered with these white light-emitting diodess 81, yet in other was used, these red diodes 85 can be positioned at the periphery of all these white light-emitting diodess 81, or mix and arrange.
The foregoing description only is explanation principle of the present invention and effect thereof, and unrestricted the present invention, so the those skilled in the art makes amendment to the foregoing description and changes and still do not break away from spirit of the present invention.Interest field of the present invention should be listed as above-mentioned claim.
Claims (16)
1. light emitting diode, it comprises a blue light crystal grain and a phosphor powder layer, covers on this blue light crystal grain; This blue light crystal grain is to produce blue light when being used to be excited, and this phosphor powder layer is to produce sodium yellow when being used to be excited; It is characterized in that this light emitting diode more comprises a ruddiness crystal grain, also covered, produce the red light of reinforcement when being used to be excited by this phosphor powder layer.
2. backlight module, it comprises light emitting diode according to claim 1.
3. LCD, it comprises backlight module according to claim 2.
4. LCD TV, it comprises backlight module according to claim 2.
5. direct type backlight module comprises:
One housing;
One light source is located in this housing;
One reflecting plate is located at this light source below, in order to reflect the light that this light source produces; And
One diffuser plate is located at this light source top, in order to light that even this light source of diffusion produced and from this baffle reflection and the light that comes;
It is characterized in that: this light source comprises a plurality of fluorescent tubes and a plurality of green diode.
6. direct type backlight module according to claim 5, wherein these fluorescent tubes are to be cathode fluorescent tube.
7. direct type backlight module according to claim 5, wherein these fluorescent tubes and these green diodes are to be staggered.
8. direct type backlight module according to claim 5, wherein these green diodes are strip.
9. direct type backlight module according to claim 5, wherein these green diodes are positioned at the periphery of all these fluorescent tubes.
10. LCD, it comprises direct type backlight module according to claim 5.
11. a LCD TV, it comprises direct type backlight module according to claim 5.
12. a direct type backlight module comprises:
One housing;
One light source is located in this housing;
One reflecting plate is located at this light source below, in order to reflect the light that this light source produces; And
One diffuser plate is located at this light source top, in order to light that even this light source of diffusion produced and from this baffle reflection and the light that comes;
It is characterized in that: this light source comprises a plurality of white light-emitting diodess and a plurality of red diodes.
13. direct type backlight module according to claim 12, wherein these white light-emitting diodess and these red diodes are to be staggered.
14. direct type backlight module according to claim 12, wherein these red diodes are positioned at the periphery of all these white light-emitting diodess.
15. a LCD, it comprises direct type backlight module according to claim 12.
16. a LCD TV, it comprises direct type backlight module according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100705757A CN1734328A (en) | 2004-08-10 | 2004-08-10 | LED and back light module with LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100705757A CN1734328A (en) | 2004-08-10 | 2004-08-10 | LED and back light module with LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1734328A true CN1734328A (en) | 2006-02-15 |
Family
ID=36076814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100705757A Pending CN1734328A (en) | 2004-08-10 | 2004-08-10 | LED and back light module with LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1734328A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101256311B (en) * | 2008-04-14 | 2011-03-16 | 友达光电股份有限公司 | Lcd |
| CN102095093A (en) * | 2010-11-16 | 2011-06-15 | 东莞市科磊得数码光电科技有限公司 | Novel high-power LED (light emitting diode) integrated light source |
| CN102323688A (en) * | 2006-03-21 | 2012-01-18 | 株式会社半导体能源研究所 | Backlight apparatus and display device |
-
2004
- 2004-08-10 CN CNA2004100705757A patent/CN1734328A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323688A (en) * | 2006-03-21 | 2012-01-18 | 株式会社半导体能源研究所 | Backlight apparatus and display device |
| CN106154643A (en) * | 2006-03-21 | 2016-11-23 | 株式会社半导体能源研究所 | Backlight apparatus and display device |
| CN101256311B (en) * | 2008-04-14 | 2011-03-16 | 友达光电股份有限公司 | Lcd |
| CN102095093A (en) * | 2010-11-16 | 2011-06-15 | 东莞市科磊得数码光电科技有限公司 | Novel high-power LED (light emitting diode) integrated light source |
| CN102095093B (en) * | 2010-11-16 | 2015-06-03 | 东莞市科磊得数码光电科技有限公司 | Novel high-power LED (light emitting diode) integrated light source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI455374B (en) | White light emitting diode module | |
| US20060237737A1 (en) | Light emitting diode and backlight module having light emitting diode | |
| CN100435336C (en) | Semiconductor light emitting device, backlight device for liquid crystal display | |
| CN202521397U (en) | Backlight module | |
| US7080933B2 (en) | BLU and module using the BLU | |
| KR100986359B1 (en) | Light emitting apparatus and display apparatus having the same | |
| KR101907390B1 (en) | White light emitting device and display apparatus | |
| CN109616011B (en) | Backlight module and display device | |
| US20080266900A1 (en) | Backlight Using LED Parallel to Light Guide Surface | |
| CN1937222B (en) | LED package and illuminating device | |
| JP5226323B2 (en) | Light emitting module and backlight and liquid crystal display device using the same | |
| JP2006190957A (en) | White light emitting device and backlight module using same | |
| JP2008166825A (en) | White light-emitting device, and light source module for lcd backlight using same | |
| CN102144307A (en) | An LED package and a backlight unit comprising said LED package | |
| JP2007036041A (en) | Light-emitting apparatus and optical apparatus | |
| CN105759500A (en) | Quantum dot backlight module and liquid crystal television | |
| KR101797669B1 (en) | Backlight apparatus and display apparatus including the same | |
| KR101294849B1 (en) | Backlight assemlby | |
| KR20130070043A (en) | Light emitting diode and liquid crystal display device using the same | |
| CN101089699A (en) | Method for improving color reprodubility of liquid crystal display and its LED backlight module | |
| JP2002270020A (en) | Light source device | |
| CN1734328A (en) | LED and back light module with LED | |
| TWI539621B (en) | Led package and backlight unit having the same | |
| US11709393B2 (en) | Light-emitting diode adopting a multi-color light emitting chip and backlight-type display device including the light-emitting diode | |
| US20080273141A1 (en) | Light-Emitting Diode Package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |