CN101655214B - Backlight structure - Google Patents
Backlight structure Download PDFInfo
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- CN101655214B CN101655214B CN2008101185832A CN200810118583A CN101655214B CN 101655214 B CN101655214 B CN 101655214B CN 2008101185832 A CN2008101185832 A CN 2008101185832A CN 200810118583 A CN200810118583 A CN 200810118583A CN 101655214 B CN101655214 B CN 101655214B
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- light source
- atomizing
- guide plate
- light guide
- light
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Abstract
The invention discloses a backlight structure, relates to an optical structure and solves the problem that the prior backlight structure is susceptible to leading to display screen bright lines. The backlight structure comprises a reflecting film, a light guide plate arranged on the reflecting film and a first light source arranged on one side of a first incident surface of the light guide plate, wherein the light-emitting surface, close to the side of the first light source, of the light guide plate is provided with a first atomizing structure zone. The backlight structure is suitable for backlight manufacturing.
Description
Technical field
The present invention relates to a kind of optical texture, relate in particular to a kind of back light source structure.
Background technology
Backlight is to show the assembly that electronic product provides background light source, is mainly used at present on various communicating terminals and the electric consumers.It has been generally acknowledged that the backlight that the display below 17 cun uses is small-sized backlight.As shown in Figure 1, small-sized backlight generally is made of backboard 10, lampshade 20, reflectance coating 30, light guide plate 40, blooming 50, light source 60, framework 70.Common small-sized back light source structure uses the thin type light guide plate, but the applied display screen backgrounds picture of this backlight is easy to generate bright line, and this bright line is inevitable.
The reason that produces bright line is such: most of light that light source is launched is on inciding the exiting surface of described light guide plate the time, incident angle is greater than the critical angle between light guide plate and the outside air, for example 42 °, penetrate from the light guide plate exiting surface after the scattering point scattering that runs into netted printing on the light guide plate lower surface on the exiting surface of light guide plate after by total reflection, light is softer; Light is being 2. through being scattered from E point after the upper surface total reflection of light guide plate among Fig. 1, and is weakened from the light of the upper surface outgoing of light guide plate again, so comparatively soft afterwards.The small part light that light source is launched can incide the exiting surface of light guide plate after the reflection in the slit, edge of light guide plate 40 and reflectance coating 30, the incident angle of these light can reflect away through the light guide plate exiting surface less than 42 °; Among Fig. 1 light 1. through after the edge reflections of described reflectance coating 30 from the C point incident of light guide plate again from the outgoing of D point, the light of D point outgoing is more sharp-pointed, thereby produces bright line on display screen.
Usually when design, will consider the light from the direct outgoing of exiting surface of light guide plate is blocked with framework, but because small-sized backlight requires the viewing area bigger, but the design space, edge of framework is very little, can not block these very sharp-pointed light with framework fully.
State in realization in the process of backlight manufacturing, the inventor finds that there are the following problems at least in the prior art:
Because when part incides on the exiting surface of described light guide plate without the light of the scattering point scattering of bottom surface of light guide plate, incident angle is less than the critical angle between light guide plate and the air, intense light reflects away from the exiting surface of light guide plate, therefore on display screen, cause bright line, influenced the display effect of display screen.
Summary of the invention
The invention provides a kind of back light source structure, solved the problem that existing back light source structure causes the display screen bright line easily.
For achieving the above object, the present invention adopts following technical scheme:
A kind of back light source structure, comprise: reflectance coating, be located at light guide plate and first light source of being located at first plane of incidence, one side of described light guide plate on the described reflectance coating, and on the close exiting surface of described first light source, one side of described light guide plate, be provided with the first atomizing structural region.
Back light source structure provided by the invention can carry out scattering to the light from this regional outgoing, thereby reduce the display screen bright line by be provided with the first atomizing structural region on the close exiting surface of first light source, one side of light guide plate.
Description of drawings
Fig. 1 is prior art back light source structure and light path synoptic diagram;
Fig. 2 is the embodiment of the invention one back light source structure and light path synoptic diagram;
Fig. 3 is the synoptic diagram that the embodiment of the invention one first atomizing structure is formed by circular atomizing particle;
Fig. 4 is the synoptic diagram that the embodiment of the invention one first atomizing structure is formed by the hexagon atomizing particle;
Fig. 5 is the synoptic diagram that the embodiment of the invention one first atomizing structure is formed by circular grid;
Fig. 6 is the synoptic diagram that the embodiment of the invention one first atomizing structure is formed by hexagonal mesh;
Fig. 7 is an embodiment of the invention wedge shape light guide plate synoptic diagram;
Fig. 8 is the embodiment of the invention two back light source structures and light path synoptic diagram;
Fig. 9 is the synoptic diagram that the embodiment of the invention 2 first atomizing structures and the second atomizing structure are formed by hexagon and circular atomizing particle respectively.
Description of reference numerals:
10, backboard; 20, lampshade; 30, reflectance coating; 40, light guide plate; 50, blooming; 60, light source; 61, the first light sources; 62, secondary light source; 70, framework; 81, the first atomizing structural regions; 82, the second atomizing structural regions; 1., 2., 3., 4., light; A, exiting surface; B, the plane of incidence; B1, first plane of incidence; B2, second plane of incidence; C, incidence point; D, G, refraction point; E, scattering point; F, exit point is all-trans.
Embodiment
The invention provides a kind of back light source structure, can reduce the display screen bright line.Below in conjunction with accompanying drawing embodiment of the invention back light source structure is described in detail.Should be clear and definite, below only be, and be not intended to limit the scope of the invention the specifying of the embodiment of the invention.
Embodiment one
As shown in Figure 2, the present embodiment back light source structure comprises: reflectance coating 30, be located at the light guide plate 40 on the described reflectance coating 30, lower surface in described light guide plate 40 is provided with lattice point structure, so that can carry out scattering to the light that arrives described lower surface, and first light source 61 of being located at first plane of incidence B1, one side of described light guide plate 40, and on the described light guide plate 40 close exiting surface A of described first light source, 61 1 sides, be provided with the first atomizing structural region 81.
As shown in Figure 1, correspondingly the present embodiment back light source structure also comprises: the backboard 10 of reflectance coating 30 belows, be arranged at the lampshade 20 in described first light source 61 outsides, and the blooming 50 that is provided with on the exiting surface of light guide plate, the present embodiment back light source structure outside is provided with framework 70 in addition.
Present embodiment preferably carries out following setting with the width of the described first atomizing structural region 81: described atomizing structural region 81 on described exiting surface A from described plane of incidence B1 towards the width X that extends away from first light source, 61 directions is:
X＝D×tan(arcSin(n
o/n
1))
Wherein, D is the thickness of described light guide plate 40, n
oBe the refractive index of air, n
1Refractive index for described light guide plate 40 materials.
With the width of the first atomizing structural region 81 be by the reason of above-mentioned formula setting, as shown in Figure 2, the light that first light source 61 sends is 3. after the C point is reflected, incide the F point of light guide plate, if at this moment 3. light be critical angle between light guide plate material and the air in the incident angle of described light guide plate upper surface, then 3. light will be scattered at the lower surface that the F point total reflection takes place and can arrive described light guide plate 40.Therefore if other light arrives the right side that F is ordered, then can not total reflection take place and can reflect away from exiting surface A.These light are not owing to pass through the scattering of the lattice point structure on described light guide plate 40 lower surfaces, and intensity is bigger.Cause bright line for fear of these light on display screen, the zone on present embodiment F point right side on the exiting surface of light guide plate 40 is provided with the first atomizing structural region, and these light are carried out scattering, makes the emergent ray weakened.For example, 4. the light that light source 61 sends incide the G point on the light guide plate exiting surface equally after the C point is reflected, then be atomized structural scattering at the G point, so emergent light dies down.
Preferred index is 1.49 light guide plate material in the present embodiment, and air refraction is 1.0, and the thickness of light guide plate is 4mm in addition, thereby the width X that obtains described atomizing structural region 81 is 3.6mm.
As shown in Figure 3, Figure 4, the first atomizing structure is formed by the atomizing particle that is dispersed on the described exiting surface A, and the shape of described atomizing particle preferably adopts circle, hexagon or circular and hexagonal combination.The first atomizing structure shown in Figure 3 is formed by circular atomizing particle, and the first atomizing structure shown in Figure 4 is formed by the hexagon atomizing particle.The described first atomizing structure can also be formed by the grid that is located on the described exiting surface A, and described grid preferably adopts circle, hexagon or circular and hexagonal combination.The first atomizing structure shown in Figure 5 is formed by circular grid, and the first atomizing structure shown in Figure 6 is formed by hexagonal mesh.But the present invention is not limited thereto, and described atomizing particle or grid also can be other shapes.The size of atomizing particle or grid is in the present embodiment: 30 μ m～70 μ m, the thickness of the first atomizing structural region 81 is: 20 μ m～40 μ m.
Present embodiment is set to light guide plate 40 plate shaped, for the saving of implementation space, can also adopt the wedge shape light guide plate, as shown in Figure 7 in ultrathin display.First light source of selecting for use in the present embodiment in addition 61 can be in light emitting diode, cold-cathode fluorescence lamp, EL sheet or the miniature bulb any, or other light sources.
Embodiment two
As shown in Figure 8, present embodiment is on the basis of embodiment one, second plane of incidence B2, one side relative with described first plane of incidence B1 on described light guide plate 40 is provided with secondary light source 62, secondary light source 62 is parallel with described first light source 61, the exiting surface A of described secondary light source 62 1 sides is provided with the second atomizing structural region 82, and described second atomizing structural region 82 and the described first atomizing structural region were listed in the both sides of described exiting surface in 81 minutes.
The width of the second atomizing structural region 82 is identical with the width of the first atomizing structural region 81, equals X from described second plane of incidence B2 towards the width Y that extends away from described secondary light source 62 directions on described exiting surface A, that is:
Y＝X＝D×tan(arcSin(n
o/n
1))
After being provided with the second atomizing structural region 82, the light that sends from secondary light source 62 is on inciding the second atomizing structural region 82 time, if reflect away from exiting surface A after incident angle then can be atomized structural scattering less than the critical angle between light guide plate and the air again.
The second atomizing structure can be formed by the atomizing particle that is dispersed on the exiting surface A, and the shape of described atomizing particle preferably adopts circle, hexagon or circular and hexagonal combination.As shown in Figure 9, on the exiting surface of light guide plate 40, the first atomizing structure is formed by the hexagon atomizing particle, and the second atomizing structure is formed by circular atomizing particle.The described second atomizing structure can also be formed by the grid that is located on the described exiting surface A, and described grid preferably adopts circle, hexagon or circular and hexagonal combination.But the present invention is not limited thereto, and described atomizing particle or grid also can be other shapes, and first the atomizing structure and second the atomizing structure can also form by atomizing particle and grid respectively.The size of atomizing particle or grid is in the present embodiment: 30 μ m～70 μ m, the thickness of the second atomizing structural region 82 is: 20 μ m～40 μ m.
The secondary light source of selecting for use in the present embodiment in addition 62 can be in light emitting diode, cold-cathode fluorescence lamp, EL sheet or the miniature bulb any, can also be other light sources.
Embodiment of the invention back light source structure is by being provided with the first atomizing structural region on the close exiting surface of first light source, one side of light guide plate, and the second atomizing structural region also is set on the close exiting surface of secondary light source one side of light guide plate for back light source structure with secondary light source, the light that incides the first atomizing structural region and the second atomizing structural region from slit between light guide plate and the reflectance coating can be carried out scattering, make the emergent ray weakened, prevent that the high light line from shining display screen from these two zones, thereby reduced the display screen bright line.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. back light source structure, comprise: reflectance coating, be located at light guide plate and first light source of being located at first plane of incidence, one side of described light guide plate on the described reflectance coating, it is characterized in that, on the close exiting surface of described first light source, one side of described light guide plate, be provided with the first atomizing structural region.
2. back light source structure as claimed in claim 1, it is characterized in that, the opposite of first plane of incidence also has second plane of incidence on described light guide plate, correspondingly be provided with secondary light source, secondary light source is parallel with described first light source, the exiting surface of described secondary light source one side is provided with the second atomizing structural region, and described second atomizing structural region and the described first atomizing structural region branch are listed in the both sides of described exiting surface.
3. back light source structure as claimed in claim 1 or 2 is characterized in that, the described first atomizing structure and the second atomizing structural region on described exiting surface from the corresponding plane of incidence towards the width X that extends away from the respective sources direction are:
X＝D×tan(arcSin(n
o/n
1))
Wherein, D is the thickness of described light guide plate, n
oBe the refractive index of air, n
1Refractive index for described light guide plate material.
4. back light source structure as claimed in claim 1 or 2 is characterized in that, the described first atomizing structure and the second atomizing structure are formed by the atomizing particle that is dispersed on the described exiting surface.
5. back light source structure as claimed in claim 4 is characterized in that the shape of described atomizing particle comprises circle and/or hexagon.
6. back light source structure as claimed in claim 1 or 2 is characterized in that, the described first atomizing structure and the second atomizing structure are formed by the grid that is located on the described exiting surface.
7. back light source structure as claimed in claim 6 is characterized in that described grid comprises circle and/or hexagon.
8. back light source structure as claimed in claim 4 is characterized in that, the size of described atomizing particle is: 30 μ m～70 μ m.
9. back light source structure as claimed in claim 6 is characterized in that, the size of described grid is: 30 μ m～70 μ m.
10. back light source structure as claimed in claim 1 or 2 is characterized in that, the thickness of the described first atomizing structural region and the second atomizing structural region is: 20 μ m～40 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101185832A CN101655214B (en) | 2008-08-19 | 2008-08-19 | Backlight structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101185832A CN101655214B (en) | 2008-08-19 | 2008-08-19 | Backlight structure |
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| Publication Number | Publication Date |
|---|---|
| CN101655214A CN101655214A (en) | 2010-02-24 |
| CN101655214B true CN101655214B (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101185832A Active CN101655214B (en) | 2008-08-19 | 2008-08-19 | Backlight structure |
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| CN (1) | CN101655214B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324889A (en) * | 2015-07-07 | 2017-01-11 | 南京瀚宇彩欣科技有限责任公司 | Backlight module and display device |
| CN107505769B (en) | 2017-08-15 | 2021-02-26 | 京东方科技集团股份有限公司 | Backlight structure and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2492866Y (en) * | 2001-08-15 | 2002-05-22 | 曾志强 | Back lighting module with rolled intermediate atomized diffusion layer |
| CN1560680A (en) * | 2004-03-09 | 2005-01-05 | 常州丰盛塑料有限公司 | Diffusion plate for backlight assembly of liquid crystal TV. and production method |
| CN101201496A (en) * | 2006-12-12 | 2008-06-18 | 钰瀚科技股份有限公司 | Backlight module with fluorescent layer and display panel |
| CN101354492A (en) * | 2007-07-24 | 2009-01-28 | 北京京东方光电科技有限公司 | LCD backlight source |
-
2008
- 2008-08-19 CN CN2008101185832A patent/CN101655214B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2492866Y (en) * | 2001-08-15 | 2002-05-22 | 曾志强 | Back lighting module with rolled intermediate atomized diffusion layer |
| CN1560680A (en) * | 2004-03-09 | 2005-01-05 | 常州丰盛塑料有限公司 | Diffusion plate for backlight assembly of liquid crystal TV. and production method |
| CN101201496A (en) * | 2006-12-12 | 2008-06-18 | 钰瀚科技股份有限公司 | Backlight module with fluorescent layer and display panel |
| CN101354492A (en) * | 2007-07-24 | 2009-01-28 | 北京京东方光电科技有限公司 | LCD backlight source |
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| Publication number | Publication date |
|---|---|
| CN101655214A (en) | 2010-02-24 |
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Owner name: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY Effective date: 20141128 Owner name: JINGDONGFANG SCIENCE AND TECHNOLOGY GROUP CO., LTD Free format text: FORMER OWNER: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20141128 |
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Free format text: CORRECT: ADDRESS; FROM: 100176 DAXING, BEIJING TO: 100015 CHAOYANG, BEIJING |
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Effective date of registration: 20141128 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE Technology Group Co., Ltd. Patentee after: Beijing BOE Photoelectricity Science & Technology Co., Ltd. Address before: 100176 No. 8 West Central Road, Beijing economic and Technological Development Zone, Beijing Patentee before: Beijing BOE Photoelectricity Science & Technology Co., Ltd. |