CN109001856A - Special-shaped light guide plate, backlight module and display device - Google Patents
Special-shaped light guide plate, backlight module and display device Download PDFInfo
- Publication number
- CN109001856A CN109001856A CN201810863808.0A CN201810863808A CN109001856A CN 109001856 A CN109001856 A CN 109001856A CN 201810863808 A CN201810863808 A CN 201810863808A CN 109001856 A CN109001856 A CN 109001856A
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- Prior art keywords
- light
- guide plate
- light guide
- incidence
- abnormity
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
This application provides a kind of special-shaped light guide plate, backlight module and display devices, the abnormity light guide plate is plate structure, its upper surface is light-emitting surface, opposite sides face is side incidence surface, and light incidence structure is formed on its lower surface, the prominent lower surface setting of light incidence structure, light incidence structure have at least one back incidence surface, the corresponding lamp bar of each back incidence surface.In this way, the application can be such that the brightness in the middle part of the small thickness light guide plate of large scale declines to be compensated, to mention high display quality.
Description
Technical field
This application involves field of display technology, it is specifically related to a kind of special-shaped light guide plate, backlight module and display device.
Background technique
Currently, the side-edge type backlight based on light guide plate is designed using upper and lower bilateral entering light, it is detailed in Fig. 1, is located at and leads
Two lamp bars 3 of 1 two opposite flanks of tabula rasa shine, and light 2 is coupled by the side incidence surface positioned at light guide plate side and leads
Inside tabula rasa, and after the circulation ways such as the reflection of light guide plate 1, refraction, uniformly exported from the light-emitting surface of light guide plate 1.It is this
Method light-out effect in light guide plate small size is fair, but as light guide plate (panel) size rises, effect sharply deteriorates.Size
When increasing to 70 cun or more, the dimmed problem in middle part easily occurs.
To solve the above-mentioned problems, a kind of existing solution is to increase light guide plate, but this method can be led
Mould group weight is caused to increase severely, production cost increases；Existing another kind solution is to abandon side entering type structure and use straight-down negative
Backlight, but this method can make mould group thickness rise.
Summary of the invention
In order to solve the above technical problems, this application provides a kind of special-shaped light guide plate, backlight module and display devices, to mend
The brightness decline in large scale side-edge type backlight in the middle part of light guide plate is repaid, to mention high display quality.
In order to solve the above technical problems, on the one hand the embodiment of the present application provides a kind of special-shaped light guide plate, the abnormity is guide-lighting
Plate is plate structure, and upper surface is light-emitting surface, and opposite sides face is side incidence surface, and light incidence knot is formed on its lower surface
Structure, the prominent lower surface setting of light incidence structure, light incidence structure have at least one back incidence surface, each back incidence surface corresponding one
A lamp bar.
In order to solve the above technical problems, on the other hand the embodiment of the present application also provides a kind of backlight module, the backlight module
Including side entering optical source, special-shaped light guide plate described in light source and any above-described embodiment is carried on the back, side entering optical source respective side enters light
The back incidence surface setting that light incidence structure is corresponded into light source is carried on the back in face setting.
In order to solve the above technical problems, on the other hand the embodiment of the present application provides a kind of display device again, the display device
Including backlight module described in above-described embodiment.
The beneficial effect of the application is: it is different from the prior art, abnormity light guide plate provided by the present application is plate structure,
Upper surface is light-emitting surface, and opposite sides face is side incidence surface, and light incidence structure is formed on its lower surface, and light incidence structure is prominent
Lower surface is arranged out, and light incidence structure has at least one back incidence surface, the corresponding lamp bar of each back incidence surface, in this way, can
Lamp bar is introduced in the lower surface of special-shaped light guide plate, the light of lamp bar transmitting is coupled into abnormity by the light incidence structure of lower surface and leads
Behind tabula rasa inside, the brightness decline in the middle part of the small thickness light guide plate of large scale can be compensated, to mention high display quality.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the light path schematic diagram of light guide plate in a kind of side-edge type backlight of the prior art；
Fig. 2 is the structural schematic diagram of one embodiment of the application abnormity light guide plate；
Fig. 3 is the schematic cross-section of special-shaped light guide plate in Fig. 2；
Fig. 4 is the structural schematic diagram of another embodiment of the application abnormity light guide plate；
Fig. 5 is the schematic cross-section of special-shaped light guide plate in Fig. 4；
Fig. 6 is the optical path analysis figure of light incidence structure in special-shaped light guide plate in Fig. 4；
Fig. 7 is the simple the schematic diagram of the section structure of one embodiment of the application backlight module；
Fig. 8 is the structural schematic diagram of one embodiment of the application display device.
Specific embodiment
With reference to the accompanying drawings and examples, the application is described in further detail.It is emphasized that following implement
Example is merely to illustrate the application, but is not defined to scope of the present application.Likewise, following embodiment is only the portion of the application
Point embodiment and not all embodiments, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, shall fall in the protection scope of this application.
Term " first ", " second ", " third " in the application are used for description purposes only, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second ", " are defined as a result,
Three " feature can explicitly or implicitly include at least one of the features.In the description of the present application, the meaning of " plurality " is extremely
It is two few, such as two, three etc., unless otherwise specifically defined.The directional instruction of institute is (all in the embodiment of the present application
Such as up, down, left, right, before and after ...) it is only used for explaining in the phase under a certain particular pose (as shown in the picture) between each component
To positional relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith
Become.In addition, term " includes " and " having " and their any deformations, it is intended that cover and non-exclusive include.Such as comprising
The process, method, system, product or equipment of a series of steps or units are not limited to listed step or unit, and
It is optionally further comprising the step of not listing or unit, or optionally further comprising for these process, methods, product or equipment
Intrinsic other step or units.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Fig. 2 and Fig. 3 are please referred to, Fig. 2 is the structural schematic diagram of one embodiment of the application abnormity light guide plate, and Fig. 3 is different in Fig. 2
The schematic cross-section of shape light guide plate.Special-shaped light guide plate 10 in the present embodiment is plate structure, and upper surface is light-emitting surface 11, phase
It is side incidence surface 12 to two sides, and is formed with light incidence structure 14 on its lower surface 13, the prominent lower surface of light incidence structure 14
13 settings, light incidence structure 14 have at least one back incidence surface 141, the corresponding lamp bar of each back incidence surface 141.
To meet the needs of people are to large scale side-edge type backlight, the guide-lighting board size in side-edge type backlight is increased
Greatly, the dimmed problem in middle part easily occurs, so as to cause the display quality decline of display picture, or even cannot normally show.
It is different from the prior art, the special-shaped light guide plate of the present embodiment is provided with light incidence on the opposite side of its light-emitting surface
Structure, incident light are coupled to inside special-shaped light guide plate after the refraction of light incidence structure, can make the small thickness light guide plate of large scale
The brightness at middle part, which declines, to be compensated, to mention high display quality.
Fig. 4 and Fig. 5 are please referred to, Fig. 4 is the structural schematic diagram of another embodiment of the application abnormity light guide plate, and Fig. 5 is in Fig. 4
The schematic cross-section of special-shaped light guide plate.Special-shaped light guide plate 20 in the present embodiment is plate structure, and upper surface is light-emitting surface 21,
Opposite sides face is side incidence surface 22, and is formed with light incidence structure 24 on its lower surface 23.Light incidence structure 24 protrudes following table
Face 23 is arranged, and light incidence structure 24 has at least one back incidence surface 2411, and each back incidence surface 2411 corresponds to a lamp bar, and
Light incidence structure 24 is set between two side incidence surfaces 22, is parallel to side incidence surface 22, between two side incidence surfaces 22
It is equidistant.
Wherein, light incidence structure 24 can be two or more, and two or more smooth incidence structure
The lower surface 23 of special-shaped light guide plate 20 is accordingly divided into two equal portions or equal portions more more than two equal portions by 24, to meet to light guide plate
Larger sized demand, and ensure the uniformity of light guide plate light-emitting surface brightness.
In the present embodiment, upper surface 21 is provided with light damping plate 25 in the position of corresponding light incidence structure 24.Light damping plate 25
Meeting carries out a certain proportion of decaying to the transmitted ray of its overlay area, to prevent the light-emitting surface 21 of special-shaped light guide plate 20 because of part
It crosses bright and generates speck.
Preferably, area coverage of the light damping plate 25 on the upper surface 21 is not less than light incidence structure 24 in lower surface 23
On projected area.
In the present embodiment, preferably light damping plate 25 will not change light color temperature using neutral grey light damping plate, neutral ash light damping plate.
Optionally, the equal length of the length of light incidence structure 24 and side incidence surface 22.
Optionally, light incidence structure 24 includes lug boss 241 and light collecting part 242, and lug boss 241 is by special-shaped light guide plate 20
Lower surface 23 extend to form, wherein the end plane that lug boss 241 extends be back incidence surface 2411, light collecting part 242 be arranged
In on the back incidence surface 2411 of lug boss 241, the interior thickness of light collecting part 242 is greater than its edge thickness, and light collecting part 242 is convex surface
Concentration structure.The intermediate position protrusion of light collecting part 242, peripheral part are gradually drawn close to lug boss 241, until its surface and protrusion
The surface in portion 241 is overlapped.
Further, light collecting part 242 is provided with multiple, and recline setting between each other, is arranged on lug boss 241.
Optionally, there are two the settings of lug boss 241, mutually recline setting, and the distance extended by the lower surface 23
It is longer, it spaces between bigger.
Wherein, the present embodiment preferably two lug bosses 241 are symmetrical arranged in mirror surface, the back incidence surface of each lug boss 241
A 2411 corresponding lamp bars.Specifically, lamp bar includes plurality of LEDs lamp, is set to the back incidence surface 2411 that lug boss 241 extends
On multiple convex surface concentration structures 242 and the LED light in lamp bar correspond, i.e., the top of each convex surface concentration structure 242 is equal
It is corresponding with a LED light, convex surface concentration structure 242 has convergence effect to the light that LED light emits.
In addition, the size of LED light and the size of convex surface concentration structure 242 are proportional, it is preferable that LED light Micro
LED, light collecting part are miniature convex surface concentration structure, are applicable to the occasion of the small thickness of large scale.For some supers or
Little occasion LED light is required to be also possible to stock size LED light TV box, at this time corresponding 242 ruler of convex surface concentration structure
It is very little also accordingly to become larger.
Further, 241 opposed bottom face 23 of lug boss is obliquely installed, between lug boss 241 and the normal of lower surface 23
Angle be greater than the angle of total reflection of special-shaped light guide plate 20, to ensure that light is coupled into special-shaped light guide plate by light incidence structure 24
The condition of total reflection is able to satisfy behind 20 inside.
Wherein, the material of special-shaped 20 each section of light guide plate is identical, refractive index having the same, if n is special-shaped light guide plate 20
Refractive index, then it is corresponding abnormity light guide plate 20 the angle of total reflection be arcsin (1/n).Preferably, special-shaped light guide plate 20
Material is polymethyl methacrylate (PMMA), and PMMA is excellent macromolecule transparent material, there is optical well, refraction
Rate is 1.49, and the angle of total reflection of corresponding abnormity light guide plate 20 is 42 degree.
Specifically, referring to Fig. 6, Fig. 6 is the optical path analysis figure of light incidence structure 24 in the present embodiment abnormity light guide plate 20.
Light collecting part 242 is convex surface concentration structure in the present embodiment, and the angle of 23 normal a of lower surface and 241 middle line b of lug boss is θ, LED
The light 27 that lamp 26 emits is gathered by convex surface concentration structure 242 and is coupled to inside special-shaped light guide plate 20.The preferred LED of the present embodiment
Lamp 26 is similar to directional light using the LED light with smaller half-value angle, to ensure to enter the light 27 inside special-shaped light guide plate 20, i.e.,
It is considered that the light 27 that LED light 26 emits reaches after the coupling of convex surface concentration structure 242 is incident to special-shaped 20 inside of light guide plate
The incidence angle of upper surface 21 is approximately θ, and θ is greater than the angle of total reflection of special-shaped light guide plate 20 in the present embodiment, so that by light incidence
Total reflection can occur inside special-shaped light guide plate 20 and enter to far from light for the light 27 that structure 24 enters inside special-shaped light guide plate 20
It propagates in the direction for penetrating structure 24.
It is different from the prior art, the special-shaped light guide plate of the present embodiment is provided with light incidence on the opposite side of its light-emitting surface
Structure, light incidence structure include lug boss and light collecting part, and upper surface is provided with light damping plate in the position of corresponding light incidence structure, makes
Incident light be similar to after light collecting part is gathered it is parallel optically coupling to light guide plate inside and the inside of light guide plate meet
Total reflection condition, it is dimmed in the middle part of light guide plate to solve the problems, such as in large scale side entrance back module, while light damping plate can be with
It prevents light guide plate from generating hot spot because part is excessively bright, is conducive to improve the display quality of picture and the usage experience of user.
Referring to Fig. 7, Fig. 7 is the simple the schematic diagram of the section structure of one embodiment of the application backlight module.The present embodiment
Backlight module 30 includes side entering optical source 31, carries on the back into light source 32 and any of the above-described special-shaped light guide plate 33 as described in the examples, side
Enter the setting of 31 respective side incidence surface of light source, carries on the back the back incidence surface setting into the corresponding light incidence structure of light source 32.
In the present embodiment, carrying on the back into light source 32 can be LED light bar, and the light incidence structure of special-shaped light guide plate 33 may include
Lug boss and light collecting part, light collecting part are convex surface concentration structure.The intermediate position protrusion of light collecting part, peripheral part is gradually to lug boss
It draws close, until its surface is Chong Die with the surface of lug boss.It carries on the back into the corresponding convex surface concentration structure setting of light source 32, convex surface concentration structure
There is convergence effect to the light emitted into light source 32 is carried on the back.Specifically, it is poly- by convex surface concentration structure to carry on the back the light emitted into light source 32
After holding together to be coupled into special-shaped 33 inside of light guide plate, total reflection can occur inside special-shaped light guide plate 33 and to far from light incidence knot
Structure divides to propagation.
Side entrance back module in being different from the prior art, the backlight module in the present embodiment is in addition to side entering optical source, also
Further comprise carrying on the back into light source, carries on the back the light incidence structure setting into the corresponding special-shaped light guide plate of light source, carry on the back the light warp into light source transmitting
Cross light incidence structure be coupled into behind light guide plate inside the farther away light guide plate region of side entering optical source that can adjust the distance brightness decline into
Row compensation makes it possible to solve in the case where not increasing light guide plate in large scale side entrance back module in the middle part of light guide plate
Dimmed problem saves manufacturing cost to mention high display quality, reduces backlight module weight.
Referring to Fig. 8, Fig. 8 is the structural schematic diagram of one embodiment of the application display device.The display device of the present embodiment
40 include backlight module 42 described in display panel 41 and above-described embodiment, display device 40 can for liquid crystal display panel,
Any products or components having a display function such as oled panel, LCD TV, tablet computer, liquid crystal display, Digital Frame.
The display device of the embodiment of the present application can solve under the middle part brightness using the large scale display device of side entrance back module
Drop problem, can be improved picture quality, improve the usage experience of user.
The foregoing is merely the section Examples of the application, are not intended to limit the protection scope of the application, all utilizations
Equivalent device made by present specification and accompanying drawing content or equivalent process transformation are applied directly or indirectly in other correlations
Technical field, similarly include in the scope of patent protection of the application.
Claims (10)
1. a kind of abnormity light guide plate, which is characterized in that the abnormity light guide plate is plate structure, and upper surface is light-emitting surface, phase
It is side incidence surface to two sides, and is formed with light incidence structure on its lower surface, the prominent lower surface of smooth incidence structure
Setting, the smooth incidence structure have at least one back incidence surface, each corresponding lamp bar of the back incidence surface.
2. abnormity light guide plate according to claim 1, which is characterized in that the smooth incidence structure is set to two sides
Between incidence surface, it is parallel to the side incidence surface, and equal with the distance between two side incidence surfaces.
3. abnormity light guide plate according to claim 1, which is characterized in that the upper surface is in the correspondence smooth incidence structure
Position be provided with light damping plate.
4. abnormity light guide plate according to claim 3, which is characterized in that the covering of the light damping plate on the upper surface
Area is not less than projected area of the smooth incidence structure on the lower surface.
5. abnormity light guide plate according to claim 1, which is characterized in that the smooth incidence structure includes lug boss and gathers
Light portion, the lug boss are extended to form by the lower surface of the special-shaped light guide plate, and the end that the lug boss extends is flat
Face is the back incidence surface, and the light collecting part is set on the back incidence surface, and the light collecting part is convex surface concentration structure.
6. it is according to claim 5 abnormity light guide plate, which is characterized in that the light collecting part be provided with it is multiple, between each other
Recline setting, is arranged on the lug boss.
7. abnormity light guide plate according to claim 5, which is characterized in that there are two the lug boss settings, mutually reclines
Setting, and it is longer by the distance that the lower surface is extended, it spaces between bigger.
8. abnormity light guide plate according to claim 5, which is characterized in that the relatively described lower surface inclination of the lug boss is set
It sets, the angle between the lug boss and the normal of the lower surface is greater than the angle of total reflection of the special-shaped light guide plate.
9. a kind of backlight module, which is characterized in that the backlight module includes side entering optical source, carries on the back into light source and claim 1-
8 any special-shaped light guide plates, the side entering optical source correspond to the side incidence surface setting, and described carry on the back corresponds to the light into light source
The back incidence surface of incidence structure is arranged.
10. a kind of display device, which is characterized in that including backlight module as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810863808.0A CN109001856B (en) | 2018-08-01 | 2018-08-01 | Special-shaped light guide plate, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810863808.0A CN109001856B (en) | 2018-08-01 | 2018-08-01 | Special-shaped light guide plate, backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
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| CN109001856A true CN109001856A (en) | 2018-12-14 |
| CN109001856B CN109001856B (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810863808.0A Active CN109001856B (en) | 2018-08-01 | 2018-08-01 | Special-shaped light guide plate, backlight module and display device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749612A (en) * | 2010-01-07 | 2010-06-23 | 深圳超多维光电子有限公司 | Backlight module |
| US20120188465A1 (en) * | 2009-10-06 | 2012-07-26 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN104819393A (en) * | 2015-05-05 | 2015-08-05 | 武汉华星光电技术有限公司 | Backlight unit and liquid crystal display device |
-
2018
- 2018-08-01 CN CN201810863808.0A patent/CN109001856B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120188465A1 (en) * | 2009-10-06 | 2012-07-26 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN101749612A (en) * | 2010-01-07 | 2010-06-23 | 深圳超多维光电子有限公司 | Backlight module |
| CN104819393A (en) * | 2015-05-05 | 2015-08-05 | 武汉华星光电技术有限公司 | Backlight unit and liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| CN109001856B (en) | 2020-07-03 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |