CN100552509C - LCD and backlight module thereof - Google Patents
LCD and backlight module thereof Download PDFInfo
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- CN100552509C CN100552509C CNB2007101009751A CN200710100975A CN100552509C CN 100552509 C CN100552509 C CN 100552509C CN B2007101009751 A CNB2007101009751 A CN B2007101009751A CN 200710100975 A CN200710100975 A CN 200710100975A CN 100552509 C CN100552509 C CN 100552509C
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- guide plate
- light guide
- refractive index
- light
- backlight module
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Abstract
A kind of backlight module comprises housing, a plurality of light guide plate, a plurality of high refractive index medium and a plurality of light source.Wherein, light guide plate is disposed in the housing, and each light guide plate has an at least one incidence surface and an exiting surface.In addition, high refractive index medium is disposed at respectively between the two adjacent light guide plate.In addition, light source is disposed at respectively by the incidence surface of light guide plate.
Description
Technical field
The present invention relates to a kind of display and backlight module thereof, and relate in particular to a kind of LCD and backlight module thereof with a plurality of light conducting plate structures.
Background technology
In general display,, provide area source so below display panels, must dispose backlight module, so that display panels can reach the purpose of display frame because display panels itself does not have luminous function.In order further to promote quality of display pictures, on the market thereby the appearance of scanning backlight module (Scan backlightmodule) arranged.
Particularly, the scanning backlight module mainly is that (light guideplate LGP) constitutes with a plurality of light source by the polylith light guide plate.Wherein, the light that light source sent can be via light guide plate, and is passed to display panels, to provide display panels display frame required light source.It should be noted that the polylith light guide plate is to arrange in the mode of breasting each other.The light of launching when light source enters low refractive index dielectric by high refractive index medium, has total reflection phenomenon probably and takes place.Therefore, be positioned at the intersection of two adjacent light guide plate, can present uneven optical effect, even can produce significantly dark line.Thus, the display frame of LCD just can directly be subjected to bad influence.
Summary of the invention
The invention provides a kind of backlight module, it can provide uniform surface light source.
The present invention proposes a kind of backlight module, and it comprises housing, a plurality of light guide plate, a plurality of high refractive index medium and a plurality of light source.Wherein, light guide plate is adjacent one another are to be disposed in the housing, and each light guide plate has an at least one incidence surface and an exiting surface.In addition, high refractive index medium is disposed at respectively between the two adjacent light guide plate, and the refractive index of high refractive index medium is greater than the refractive index of light guide plate.In addition, light source is disposed at respectively by the incidence surface of light guide plate, and the light that each light source sent is suitable for by incidence surface incident, and by the exiting surface outgoing.
In one embodiment of the invention, the refractive index of above-mentioned high refractive index medium is at least greater than 1.49.
In one embodiment of the invention, the material of above-mentioned high refractive index medium for example is a high molecular polymer.
In one embodiment of the invention, the thickness of above-mentioned high refractive index medium between two adjacent light guide plate is between 0.01 to 2 millimeter.
In one embodiment of the invention, above-mentioned each light guide plate has two light entrance faces, and faces mutually each other, and light source is disposed at by the light entrance face respectively.
In one embodiment of the invention, above-mentioned each light source comprises a plurality of light emitting diodes.
In one embodiment of the invention, above-mentioned light emitting diode comprises red light-emitting diode.
In one embodiment of the invention, above-mentioned light emitting diode comprises green light LED.
In one embodiment of the invention, above-mentioned light emitting diode comprises blue light-emitting diode.
In one embodiment of the invention, above-mentioned light emitting diode comprises red light-emitting diode, green light LED, blue light-emitting diode or its combination.
The present invention proposes a kind of LCD, and it comprises above-mentioned backlight module and display panels.Wherein, display panels is disposed on the exiting surface of light guide plate.
Because of having high refractive index medium, and the refractive index of high refractive index medium is greater than the refractive index of light guide plate between the present invention's two adjacent light guide plate.Therefore, backlight module of the present invention can effectively be avoided having the phenomenon that light produces total reflection between the two adjacent light guide plate, and then can make backlight module of the present invention present uniform optical quality.Liquid crystal display applications of the present invention backlight module of the present invention, and good display quality can be arranged.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended diagram, be described in detail below.
Description of drawings
Figure 1A is the synoptic diagram of backlight module of the present invention;
Figure 1B is the local enlarged diagram of backlight module of the present invention;
Fig. 2 A is the surface of intensity distribution of not inserting high refractive index medium between the two adjacent light guide plate;
Fig. 2 B is the surface of intensity distribution of inserting between the two adjacent light guide plate behind the high refractive index medium;
Fig. 3 is the synoptic diagram of LCD of the present invention.
Embodiment
Figure 1A is the enforcement synoptic diagram according to one of backlight module of the present invention.Please refer to Figure 1A, the backlight module 100 of this embodiment comprise housing 110, a plurality of light guide plate (lightguide plate, LGP) 120, a plurality of high refractive index medium 130 and a plurality of light sources 140.Wherein, light guide plate 120 is disposed in the housing 110, and each light guide plate 120 has an at least one incidence surface 120a and an exiting surface 120b.Each light guide plate 120 shown in Figure 1A has two incidence surface 120a that face mutually each other and exiting surface 120b.Certainly, those skilled in the art should know the light guide plate 120 shown in Figure 1A at this only for illustrating, painstakingly do not limit to the kind of light guide plate 120.
In addition, high refractive index medium 130 is disposed at respectively between the two adjacent light guide plate 120.It should be noted that the refractive index of the refractive index of high refractive index medium 130 greater than light guide plate 120.In fact, the refractive index of high refractive index medium 130 is for example at least greater than 1.49.Particularly, high refractive index medium 130 can select for use the colloid of high index of refraction to form, this colloidal materials for example is transparent liquid state or solid macromolecule copolymer (polymer), makes and the material of light guide plate 120 can form blocks with the mode of propylene (Acryl) by ejection formation.Certainly, the profile of light guide plate 120 can be produced needed shape by the processing of ejection formation.
In detail, the thickness T of above-mentioned high refractive index medium 130 between two adjacent light guide plate 120 for example is between 0.01 to 2 millimeter.In addition, light source 140 is disposed at respectively by the incidence surface 120a of light guide plate 120, and the light that each light source 140 is sent is suitable for the incident by incidence surface 120a, and by exiting surface 120b outgoing.Particularly, light source 140 can comprise a plurality of light emitting diodes (light-emitting diode, LED).Wherein, the light emitting diode of light source 140 can comprise red light-emitting diode, green light LED, blue light-emitting diode or its combination.Certainly, light emitting diode also can be a single color LED, does not painstakingly limit at this; In addition, in other embodiments, light source 140 also can be made up of the light emitting source of other form, for example can be made of electroluminescent lamp light sources such as (EL).
Figure 1B is the local enlarged diagram of backlight module of the present invention.Please refer to Figure 1B, what will specify here is, because light enters low refractive index dielectric by high refractive index medium, has total reflection phenomenon probably and takes place.Therefore, be positioned at the intersection (for example between A place and the B place) of two adjacent light guide plate, can present uneven optical effect.In detail, before inserting high refractive index medium 130, have the uneven phenomenon of light intensity between the two adjacent light guide plate 120 at the intersection of two light guide plate 120.Between the A place and B place shown in Fig. 2 A, light distribution has sizable drop.By contrast, the present invention can find out obviously that by Fig. 2 B light distribution is quite approaching between A place and the B place after inserting high refractive index medium 130 between the two adjacent light guide plate 120.This be since the refractive index of high refractive index medium 130 greater than the refractive index of light guide plate 120, and then the phenomenon that can effectively avoid light between the two adjacent light guide plate 120 to have total reflection takes place.Thus, the place, boundary that backlight module 100 can effectively improve two light guide plate 120 produces the uneven phenomenon of optical effect, and then can significantly promote the optical quality that whole backlight module 100 is presented.In addition, though it should be noted that the present invention with the scanning backlight module as an embodiment, yet utilization of the present invention be not limited thereto, it also can be applicable to any backlight module with a plurality of light conducting plate structures.
Fig. 3 is the synoptic diagram of LCD of the present invention.Please refer to Fig. 3, LCD 300 of the present invention comprises above-mentioned backlight module 100 and display panels 200.Wherein, backlight module 100 is disposed at display panels 200 belows, to provide display panels 200 display frames required light source.Because backlight module 100 of the present invention can effectively provide high-quality area source, so display panels 200 quality of display pictures can further promote.
In sum, because of having high refractive index medium, and the refractive index of high refractive index medium is greater than the refractive index of light guide plate between the present invention's two adjacent light guide plate.Therefore, backlight module of the present invention can effectively avoid the intersection of two light guide plate to have the phenomenon that light produces total reflection, and then can make backlight module of the present invention present uniform optical quality.In addition, liquid crystal display applications of the present invention backlight module of the present invention, and good display quality can be arranged.
Though the present invention discloses preferred embodiment as above; right its is not that any those skilled in the art are not when breaking away from the spirit and scope of the present invention in order to qualification the present invention; can modify and change, so protection scope of the present invention should be with being as the criterion that accompanying Claim was defined.
Claims (9)
1. backlight module comprises:
Housing;
First light guide plate and second light guide plate are adjacent one another are, be disposed in the described housing, and described two light guide plate have an at least one incidence surface and an exiting surface respectively;
High refractive index medium is disposed between described first light guide plate and described second light guide plate, and the refractive index of wherein said high refractive index medium is greater than the refractive index of described two light guide plate; And
At least two light sources are disposed at by the incidence surface of first light guide plate and second light guide plate, and the light that described at least two light sources sent is by incidence surface incident, and by the exiting surface outgoing.
2. backlight module as claimed in claim 1, the refractive index of wherein said high refractive index medium is at least greater than 1.49.
3. backlight module as claimed in claim 1, the material of wherein said high refractive index medium are high molecular polymer.
4. backlight module as claimed in claim 1, the thickness of wherein said high refractive index medium is between 0.01 to 2 millimeter.
5. backlight module as claimed in claim 1, wherein each described light source comprises a plurality of light emitting diodes.
6. backlight module as claimed in claim 5, wherein said these light emitting diodes comprise red light-emitting diode, green light LED and blue light-emitting diode or its combination.
7. LCD comprises:
Backlight module, it comprises:
Housing;
First light guide plate and second light guide plate are adjacent one another are, be disposed in the described housing, and described two light guide plate have an at least one incidence surface and an exiting surface respectively;
High refractive index medium is disposed between described first light guide plate and described second light guide plate, and the refractive index of wherein said high refractive index medium is greater than the refractive index of described two light guide plate;
At least two light sources are disposed at by the incidence surface of first light guide plate and second light guide plate, and the light that described at least two light sources sent is by incidence surface incident, and by the exiting surface outgoing; And
Display panels is disposed on the exiting surface of described two light guide plate.
8. LCD as claimed in claim 7, the refractive index of wherein said high refractive index medium is at least greater than 1.49.
9. backlight module as claimed in claim 7, the material of wherein said high refractive index medium are high molecular polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101009751A CN100552509C (en) | 2007-04-28 | 2007-04-28 | LCD and backlight module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101009751A CN100552509C (en) | 2007-04-28 | 2007-04-28 | LCD and backlight module thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101295100A CN101295100A (en) | 2008-10-29 |
| CN100552509C true CN100552509C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101009751A Active CN100552509C (en) | 2007-04-28 | 2007-04-28 | LCD and backlight module thereof |
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| CN (1) | CN100552509C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080285304A1 (en) * | 2007-05-18 | 2008-11-20 | Rankin Jr Charles M | Light extraction film system |
| CN102137217A (en) * | 2010-01-25 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Image scanning device |
| JP4781483B1 (en) * | 2010-02-26 | 2011-09-28 | シャープ株式会社 | Light guide plate device, light source device, display device, and television receiver |
| JP2011227251A (en) * | 2010-04-19 | 2011-11-10 | Hitachi Consumer Electronics Co Ltd | Liquid crystal display |
| CN102748660B (en) * | 2012-06-14 | 2014-04-16 | 深圳市华星光电技术有限公司 | Three-dimensional (3D) display backlight module and light-emitting diode (LED) lamp strip thereof |
| CN102809097B (en) * | 2012-07-09 | 2015-11-25 | 深圳市华星光电技术有限公司 | Backlight module and corresponding liquid crystal indicator |
| CN103511930A (en) * | 2013-10-09 | 2014-01-15 | 深圳市华星光电技术有限公司 | LED backlight module and corresponding liquid crystal display |
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2007
- 2007-04-28 CN CNB2007101009751A patent/CN100552509C/en active Active
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| CN101295100A (en) | 2008-10-29 |
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