CN201666514U - Backlight module - Google Patents
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- CN201666514U CN201666514U CN2010201398032U CN201020139803U CN201666514U CN 201666514 U CN201666514 U CN 201666514U CN 2010201398032 U CN2010201398032 U CN 2010201398032U CN 201020139803 U CN201020139803 U CN 201020139803U CN 201666514 U CN201666514 U CN 201666514U
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- light beam
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Abstract
A backlight module comprises a first light emitting system and a second light emitting system, wherein the first light emitting system comprises a first light guide plate and at least one light emitting element. The first light emitting element is arranged beside the light incident surface of the first light guide plate and suitable for emitting a first light beam. The second light emitting system comprises a second light guide plate and at least one second light emitting element. The second light emitting element is arranged beside the light incident surface of the second light guide plate and suitable for emitting a second light beam. One of the first light beam and the second light beam consists of a blue light beam and a green light beam, and the other one is a red light beam.
Description
Technical field
The utility model relates to a kind of optical system, and is particularly related to a kind of backlight module.
Background technology
Because light emitting diode (light emitting diode, LED) have that volume is little, luminous efficiency is good, long service life, low power consumption and advantage such as environmental protection comparatively, therefore in recent years in each use field useful gradually light emitting diode replace the trend of conventional incandescent bulb and fluorescent tube.When light emitting diode being applied in the backlight liquid crystal display module, can require backlight module can send white light usually.
Can allow one of method that backlight module sends white light be to use blue LED chip to add yttrium-aluminium-garnet (yttrium aluminum garnet at present, YAG) LED encapsulation body that fluorescent material constituted, wherein blue LED chip can send blue light, and yttrium aluminium garnet fluorescent powder can change blue light into gold-tinted.Behind blue light and the gold-tinted mixed light, just can form white light.Yet this kind adopts the white light that blue LED chip and yttrium-aluminium-garnet obtained to have the problem that red wave band comparatively lacks on spectrum, thereby makes that colour rendering (color rendering index) is relatively poor.
Fig. 1 that No. the 200725104th, the TaiWan, China patent disclosure discloses a kind of backlight module, comprise first light source module and secondary light source module, wherein first light source module comprises first LGP and first light source, and the secondary light source module comprises second LGP and secondary light source.First light source is a white light source, and secondary light source is the light emitting diode of a plurality of mixed lights or polychrome mixed light.Fig. 2,3,5,6 that No. the 200938910th, the TaiWan, China patent disclosure has disclosed a kind of backlight module, comprise first LGP, second LGP, the first colourity white light emitting diode and the second colourity white light emitting diode, by the colourity and the brightness of the control adjustable backlight module of electric current.Fig. 2,3 that No. the 200508731st, the TaiWan, China patent disclosure has disclosed backlight module and has comprised first, second, third monochromatic backlight.First backlight comprises first LGP and blue dot light source, and second backlight comprises second LGP and green spot light, and the 3rd backlight comprises the 3rd LGP and red spot light.
No. the 200921208th, TaiWan, China patent disclosure, No. the 20090015755th, U.S. Patent Publication, TaiWan, China patent I308239 number, Chinese patent disclose No. 1637523, TaiWan, China patent I258621 number, TaiWan, China patent M255517 number and TaiWan, China patent I283782 also discloses multiple backlight module.TaiWan, China patent I301183 number and United States Patent (USP) have disclosed light-source structure No. 6948842.The TaiWan, China patent has disclosed light emitting diode construction M285713 number.The TaiWan, China patent has disclosed for M285714 number and has adopted the technology of chip configuration on circuit board, encloses the blue light plus red optical chip, and forms white light via the fluorescent material mixed light.
The utility model content
The utility model provides a kind of backlight module, and the area source that color is even and colour rendering is good can be provided.
Other purpose of the present utility model and advantage can be further understood from the disclosed technical characterictic of the utility model.
For reaching above-mentioned one or part or all of purpose or other purpose, an embodiment of the present utility model proposes a kind of backlight module, comprises first luminescent system and second luminescent system.First luminescent system comprises first LGP and at least one first light-emitting component.First LGP has first surface, with respect to the second surface of first surface and connect first incidence surface of first surface and second surface.First light-emitting component is disposed at by first incidence surface, and is suitable for sending first light beam.First light beam is suitable for entering in first LGP via first incidence surface, and is suitable for being passed to outside first LGP via first surface.Second luminescent system comprises second LGP and at least one second light-emitting component.Second LGP has the 3rd surface, with respect to the 4th surface on the 3rd surface and connect the 3rd surface and second incidence surface on the 4th surface.Second light-emitting component is disposed at by second incidence surface, and is suitable for sending second light beam.Second light beam is suitable for entering in second LGP via second incidence surface, and is suitable for being passed to outer second surface and the first surface of also then penetrating in regular turn of second LGP via the 3rd surface.One of first light beam and second light beam are made up of blue light beam and green beam, and another of first light beam and second light beam is red beam.
Embodiment of the present utility model can reach following advantage or effect one of at least.Because the backlight module of embodiment of the present utility model is to adopt two LGPs to guide light beam and red beam that blue light beam and green beam are formed respectively, so backlight module can provide comparatively uniform surface light source of color.In addition, because first light-emitting component and second light-emitting component of embodiment of the present utility model can send blue light beam, green beam and red beam, so backlight module can provide colour rendering preferable area source.
For above-mentioned feature and advantage of the present utility model can be become apparent, embodiment cited below particularly, and be described in detail below in conjunction with the accompanying drawings.
Description of drawings
Figure 1A is the schematic perspective view of the backlight module of an embodiment of the present utility model;
Figure 1B is the generalized section of the backlight module of Figure 1A along the I-I line;
Fig. 1 C is the enlarged drawing of the light-emitting component 210 of Figure 1B;
Fig. 2 is the spectrogram of the area source that backlight module provided of Figure 1A and Figure 1B;
Fig. 3 A is the schematic perspective view of the backlight module of another embodiment of the present utility model;
Fig. 3 B is the generalized section of the backlight module of Fig. 3 A along the II-II line.
The specific embodiment
About aforementioned and other technology contents, characteristics and effect of the present utility model, in DETAILED DESCRIPTION OF THE PREFERRED, can clearly present below in conjunction with accompanying drawing.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are directions with reference to the accompanying drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the utility model.
Figure 1A is the schematic perspective view of the backlight module of an embodiment of the present utility model, and Figure 1B is the generalized section of the backlight module of Figure 1A along the I-I line, and Fig. 1 C is the enlarged drawing of the light-emitting component 210 of Figure 1B.With reference to Figure 1A to Fig. 1 C, the backlight module 100 of present embodiment comprises luminescent system 200 and luminescent system 300.Luminescent system 200 comprises LGP 220 and at least one light-emitting component 210 (be example with a plurality of light-emitting components 210) in Figure 1A.LGP 220 has surface 222, the surface 224 with respect to surperficial 222 and connects surface 222 and the incidence surface 226 on surface 224.It is other that light-emitting component 210 is disposed at incidence surface 226, and be suitable for sending light beam 213.In the present embodiment, light beam 213 is made up of blue light beam 212a and green beam 212b.
In the present embodiment, light-emitting component 210 comprises luminescence unit 212 and wavelength conversion unit 216.Luminescence unit 212 is suitable for sending blue light beam 212a, and in the present embodiment, luminescence unit 212 for example is a blue LED chip.Wavelength conversion unit 216 is disposed on the bang path of blue light beam 212a, and is suitable for converting part blue light beam 212a to green beam 212b.In the present embodiment, wavelength conversion unit 216 comprises transparent base 217 and fluorescent material 215.Transparent base 217 is suitable for allowing blue light beam 212a penetrate, and in the present embodiment, transparent base 217 covers luminescence unit 212, to form transparent sealing.Fluorescent material 215 is doped in the transparent base 217, and is suitable for converting blue light beam 212a to green beam 212b.In the present embodiment, fluorescent material 215 for example is a green emitting phosphor.Light beam 213 is suitable for entering in the LGP 220 via incidence surface 226, and is suitable for being passed to outside the LGP 220 via surface 222.
In the present embodiment, LGP 220 has a plurality of light scattering micro-structurals 228, and LGP 320 also has a plurality of light scattering micro-structurals 328.Light scattering micro-structural 228 configurable in surface 222 and surface 224 one of at least on, and light scattering micro-structural 328 configurable in surface 322 and surface 324 one of at least on, Figure 1B be with light scattering micro-structural 228 be disposed on the surface 224 and light scattering micro-structural 328 to be disposed on the surface 324 be example.After light beam 213 entered LGP 220, segment beam 213 can be constantly by surface 222 and surperficial 224 total reflections, thereby are limited in the LGP 220.Yet light scattering micro-structural 228 can be destroyed total reflection, by this segment beam 213 is scattered to surface 222, and makes this segment beam 213 penetrate surface 222 and be passed to outside the LGP 220.In addition, in the present embodiment, backlight module 100 also comprises reflector element 110, and wherein LGP 320 is disposed between LGP 220 and the reflector element 110.Reflector element 110 for example is a reflector plate.Light scattering micro-structural 228 scatters to reflector element 110 with another part light beam 213, and reflector element 110 is these another part light beam 213 reflected back LGPs 220, and makes this another part light beam 213 penetrate surface 224 and surface 222 in regular turn.In like manner, light scattering micro-structural 328 also has the effect that is similar to light scattering micro-structural 228, to make segment beam 312a scatter to surface 322 by this, and penetrate surface 322, and make that another part light beam 312a is scattered to reflector element 110 in regular turn, the unit 110 reflected back LGPs 320 that are reflected, penetrate surface 324 and penetrate surface 322.
The backlight module 100 of present embodiment is to adopt two LGPs 220,320 to guide light beam 213 and light beam 312a (red beam) that blue light beam 212a and green beam 212b are formed respectively, therefore light beam 213 can produce equally distributed effect at LGP 220 and LGP 320 respectively with light beam 312a, and by the light beam 312a of surperficial 322 outgoing incident LGP 220 and mixing equably with light beam 213 in the LGP 220 equably.Thus, backlight module 100 just can provide comparatively uniform surface light source of color.Especially alternately be arranged in the uneven phenomenon of color that the other backlight module of incidence surface can cause area source because of the mixed light effect is limited compared to the light emitting diode that adopts different glow colors, the backlight module 100 of present embodiment adopts two LGPs 220,320 to allow light beam 213 and light beam 312a mix the color uniformity that therefore can make area source equably fully lifting significantly.
In addition, because the light-emitting component 210 and the light-emitting component 310 of present embodiment can send blue light beam 212a, green beam 212b and light beam 312a (red beam), therefore backlight module 100 can provide colour rendering preferable area source, and can not have the phenomenon that red wave band lacks as the backlight module of existing employing yttrium-aluminium-garnet light emitting diode.In addition, because blue light beam 212a, green beam 212b and light beam 312a (red beam) can be corresponding to the sensitive three primary colors of human eye, therefore when backlight module 100 is applied to LCD, can make LCD produce the higher picture of color saturation.
In addition, generally speaking, the light emitting diode of different colours may have different recession levels under long-time the use.The backlight module 100 of present embodiment adopts two LGPs 220,320 to guide light beam 213, the 312a of the different colours that light-emitting component 210 and light-emitting component 310 sent respectively respectively, and makes the drive current that feeds light-emitting component 210 and light-emitting component 310 be subjected to respectively independently controlling.Thus, when the recession level of light-emitting component 210 and light-emitting component 310 not simultaneously, still can obtain correct color by changing the size of importing light-emitting component 210 and the electric current of light-emitting component 310 respectively, produce color offset phenomenon to improve.In addition, by the drive current of allotment input light-emitting component 210, also can under the prerequisite of the mixed light color that reaches expection, reach higher luminous efficiency with light-emitting component 310.
In order further to promote the optical quality (as the brightness (luminance) and the uniformity) of area source, can adopt optical diaphragm group 120 in the present embodiment, wherein LGP 220 is disposed between optical diaphragm group 120 and the LGP 320.In the present embodiment, optical diaphragm group 120 comprise brightening piece, prismatic lens and diffusion sheet one of at least.Be to comprise that with optical diaphragm group 120 two diffusion sheet 120a, 120d and two prismatic lens 120b, 120c are example in Figure 1A and Figure 1B, wherein diffusion sheet 120a, 120d can increase the uniformity of area source, and prismatic lens 120b, 120c can increase the brightness of area source.
In the present embodiment, incidence surface 226 and incidence surface 326 are positioned at the same side of backlight module 100, illustrate as Figure 1B all to be arranged in the figure left side, but the utility model are not as limit.In other embodiments, incidence surface 226 and incidence surface 326 also can be positioned at the relative both sides of backlight module.Perhaps, in other embodiments, incidence surface 226 and incidence surface 326 also can be positioned at the adjacent both sides of backlight module, and the position that also is about to the incidence surface 226 among Figure 1A is changed to the position of the side 228 of LGP 220 among Figure 1A, and the position of light-emitting component 210 also is changed to 228 sides, side.
Fig. 2 is the spectrogram of the area source that backlight module provided of Figure 1A and Figure 1B.As shown in Figure 2, three crests of the spectrum of area source drop on respectively in redness, blueness and the green wave-length coverage, can verify that thus the area source of embodiment of the present utility model has good colour rendering, and have higher color saturation.
Fig. 3 A is the schematic perspective view of the backlight module of another embodiment of the present utility model, and Fig. 3 B is the generalized section of the backlight module of Fig. 3 A along the II-II line.With reference to Fig. 3 A and Fig. 3 B, the backlight module 100 ' of present embodiment is similar with the backlight module 100 of Figure 1A and Figure 1B, and both difference is as described below.In the backlight module 100 of Figure 1B, luminescent system 200 is than the bright dipping side of luminescent system 300 close backlight modules 100, and light beam 312a is passed to the external world via LGP 320 with LGP 220 in regular turn.Yet, in the backlight module 100 ' of present embodiment, luminescent system 300 is than the bright dipping side of luminescent system 200 close backlight modules 100 ', and light beam 213 is passed to the external world via LGP 220 with LGP 320 in regular turn, wherein the light-emitting component 310 of luminescent system 300 sends light beam 312a (red beam), and the light-emitting component 210 of luminescent system 200 sends blue light beam 212a and green beam 212b.The backlight module 100 ' of present embodiment has confers similar advantages and effect with the backlight module 100 of Figure 1A, no longer repeats at this.In addition, in the present embodiment, incidence surface 226 and incidence surface 326 lay respectively at the relative both sides of backlight module 100.
In sum, embodiment of the present utility model can reach following advantage or effect one of at least.Because the backlight module of embodiment of the present utility model is to adopt two LGPs to guide light beam and red beam that blue light beam and green beam are formed respectively, so backlight module can provide comparatively uniform surface light source of color.In addition, because first light-emitting component and second light-emitting component of embodiment of the present utility model can send blue light beam, green beam and red beam, so backlight module can provide colour rendering preferable area source.
The above, it only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, promptly the simple equivalent of doing according to the utility model claim and description generally changes and modifies, and all still belongs in the scope that the utility model patent contains.Arbitrary embodiment of the present utility model in addition or claim must not reached the disclosed whole purposes of the utility model or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting interest field of the present utility model.
Claims (16)
1. a backlight module is characterized in that, comprising:
First luminescent system comprises:
First LGP has first surface, with respect to the second surface of described first surface and connect first incidence surface of described first surface and described second surface; And
At least one first light-emitting component, be disposed at by described first incidence surface, and be suitable for sending first light beam, wherein said first light beam is suitable for entering in described first LGP via described first incidence surface, and is suitable for being passed to outside described first LGP via described first surface; And
Second luminescent system comprises:
Second LGP has the 3rd surface, with respect to the 4th surface on described the 3rd surface and connect described the 3rd surface and second incidence surface on described the 4th surface; And
At least one second light-emitting component, be disposed at by described second incidence surface, and be suitable for sending second light beam, wherein said second light beam is suitable for entering in described second LGP via described second incidence surface, and be suitable for being passed to outer described second surface and the described first surface of also then penetrating in regular turn of described second LGP via described the 3rd surface, one of wherein said first light beam and described second light beam are made up of blue light beam and green beam, and another of described first light beam and described second light beam is red beam.
2. backlight module as claimed in claim 1 is characterized in that, wherein said first light beam is made up of described blue light beam and described green beam, and described first light-emitting component comprises:
Luminescence unit is suitable for sending described blue light beam; And
Wavelength conversion unit is disposed on the bang path of described blue light beam, and is suitable for converting the described blue light beam of part to described green beam.
3. backlight module as claimed in claim 2 is characterized in that, wherein said wavelength conversion unit comprises:
Transparent base is suitable for allowing described blue light beam penetrate; And
Fluorescent material is doped in the described transparent base, and is suitable for converting described blue light beam to described green beam.
4. backlight module as claimed in claim 2 is characterized in that, wherein said luminescence unit is a blue LED chip.
5. backlight module as claimed in claim 2 is characterized in that, wherein said second light-emitting component comprises the red light-emitting diode chip.
6. backlight module as claimed in claim 1 is characterized in that, wherein said second light beam is made up of described blue light beam and described green beam, and described second light-emitting component comprises:
Luminescence unit is suitable for sending described blue light beam; And
Wavelength conversion unit is disposed on the bang path of described blue light beam, and is suitable for converting the described blue light beam of part to described green beam.
7. backlight module as claimed in claim 6 is characterized in that, wherein said wavelength conversion unit comprises:
Transparent base is suitable for allowing described blue light beam penetrate; And
Fluorescent material is doped in the described transparent base, and is suitable for converting described blue light beam to described green beam.
8. backlight module as claimed in claim 6 is characterized in that, wherein said luminescence unit is a blue LED chip.
9. backlight module as claimed in claim 6 is characterized in that, wherein said second light-emitting component comprises the red light-emitting diode chip.
10. backlight module as claimed in claim 1 is characterized in that, also comprises reflector element, and wherein said second LGP is disposed between described first LGP and the described reflector element.
11. backlight module as claimed in claim 1 is characterized in that, wherein said first incidence surface and described second incidence surface are positioned at the same side of described backlight module.
12. backlight module as claimed in claim 1 is characterized in that, wherein said first incidence surface and described second incidence surface are positioned at the relative both sides of described backlight module.
13. backlight module as claimed in claim 1 is characterized in that, wherein said first incidence surface and described second incidence surface are positioned at the adjacent both sides of described backlight module.
14. backlight module as claimed in claim 1 is characterized in that, also comprises optical diaphragm group, wherein said first LGP is disposed between described optical diaphragm group and described second LGP.
15. backlight module as claimed in claim 14 is characterized in that, wherein said optical diaphragm group comprise brightening piece, prismatic lens and diffusion sheet one of at least.
16. backlight module as claimed in claim 1 is characterized in that, wherein said second surface is between described first surface and described the 3rd surface, and described the 3rd surface is between described second surface and described the 4th surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201398032U CN201666514U (en) | 2010-03-12 | 2010-03-12 | Backlight module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201398032U CN201666514U (en) | 2010-03-12 | 2010-03-12 | Backlight module |
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| CN201666514U true CN201666514U (en) | 2010-12-08 |
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| CN2010201398032U Expired - Fee Related CN201666514U (en) | 2010-03-12 | 2010-03-12 | Backlight module |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954409A (en) * | 2011-08-24 | 2013-03-06 | 三星电子株式会社 | Backlight assembly and method for manufacturing same |
| CN104006330A (en) * | 2014-05-08 | 2014-08-27 | 深圳市华星光电技术有限公司 | Backlight module, display device and driving method thereof |
| CN104181721A (en) * | 2013-05-27 | 2014-12-03 | 乐金显示有限公司 | Display device |
| CN105446005A (en) * | 2015-12-21 | 2016-03-30 | 南京先进激光技术研究院 | Quantum dot backlight source and liquid crystal display device |
| CN108019661A (en) * | 2017-11-29 | 2018-05-11 | 广州金烁科技有限公司 | A kind of anti-dazzle ultra-thin panel light that shines comprehensively |
| CN110067950A (en) * | 2019-05-18 | 2019-07-30 | 哈尔滨理工大学 | A kind of full-spectrum LED light mixing system |
| TWI676067B (en) * | 2018-05-15 | 2019-11-01 | 友達光電股份有限公司 | Display device having ambient light compensation design |
| CN110568657A (en) * | 2018-06-05 | 2019-12-13 | 中强光电股份有限公司 | Display device |
| CN111077695A (en) * | 2018-10-18 | 2020-04-28 | 三星显示有限公司 | Backlight unit and display device including the same |
| WO2021249307A1 (en) * | 2020-06-12 | 2021-12-16 | 京东方科技集团股份有限公司 | Edge-lit backlight module, display panel and display device |
| TWI764775B (en) * | 2021-07-05 | 2022-05-11 | 瑞儀光電股份有限公司 | Backlight module and display device |
-
2010
- 2010-03-12 CN CN2010201398032U patent/CN201666514U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9291854B2 (en) | 2011-08-24 | 2016-03-22 | Samsung Display Co., Ltd. | Backlight assembly and display apparatus having the same |
| CN102954409A (en) * | 2011-08-24 | 2013-03-06 | 三星电子株式会社 | Backlight assembly and method for manufacturing same |
| CN104181721B (en) * | 2013-05-27 | 2017-07-14 | 乐金显示有限公司 | Display device |
| CN104181721A (en) * | 2013-05-27 | 2014-12-03 | 乐金显示有限公司 | Display device |
| US9482900B2 (en) | 2013-05-27 | 2016-11-01 | Lg Display Co., Ltd. | Display device |
| CN104006330A (en) * | 2014-05-08 | 2014-08-27 | 深圳市华星光电技术有限公司 | Backlight module, display device and driving method thereof |
| CN105446005A (en) * | 2015-12-21 | 2016-03-30 | 南京先进激光技术研究院 | Quantum dot backlight source and liquid crystal display device |
| CN108019661A (en) * | 2017-11-29 | 2018-05-11 | 广州金烁科技有限公司 | A kind of anti-dazzle ultra-thin panel light that shines comprehensively |
| TWI676067B (en) * | 2018-05-15 | 2019-11-01 | 友達光電股份有限公司 | Display device having ambient light compensation design |
| CN110568657A (en) * | 2018-06-05 | 2019-12-13 | 中强光电股份有限公司 | Display device |
| CN111077695A (en) * | 2018-10-18 | 2020-04-28 | 三星显示有限公司 | Backlight unit and display device including the same |
| CN110067950A (en) * | 2019-05-18 | 2019-07-30 | 哈尔滨理工大学 | A kind of full-spectrum LED light mixing system |
| WO2021249307A1 (en) * | 2020-06-12 | 2021-12-16 | 京东方科技集团股份有限公司 | Edge-lit backlight module, display panel and display device |
| TWI764775B (en) * | 2021-07-05 | 2022-05-11 | 瑞儀光電股份有限公司 | Backlight module and display device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20180312 |