CN104421768A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN104421768A CN104421768A CN201310403657.8A CN201310403657A CN104421768A CN 104421768 A CN104421768 A CN 104421768A CN 201310403657 A CN201310403657 A CN 201310403657A CN 104421768 A CN104421768 A CN 104421768A
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- China
- Prior art keywords
- blooming piece
- backlight module
- extension
- light
- glue frame
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
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- 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
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The invention discloses a backlight module and a display device. The backlight module comprises a surface light-emitting structure, an optical film group and an annular rubber frame, wherein the surface light-emitting structure is provided with a first surface, and light is emitted from the first surface; the optical film group is attached to the first surface of the surface light-emitting structure, and the optical film group is provided with a bottom-layer optical film and at least one upper-layer optical film which is arranged on the bottom-layer optical film; the annular rubber frame surrounds the surface light-emitting structure and is provided with a first extended part which extends along a direction parallel to the first surface, and the bottom-layer optical film, relative to the upper-layer optical film, extends more towards to the annular rubber frame, so that the first extended part covers at least one edge of the bottom-layer optical film.
Description
Technical field
The present invention relates to a kind of backlight module and display unit, and particularly include about blue light can be avoided from the backlight module of display edge light leak and display unit.
Background technology
In order to improve the color saturation of liquid crystal display to promote picture quality, the dealer of association area provides one and uses blue-ray LED as backlight and the scheme of quantum dot enhancing film (Quantum DotEnhancement Film) of arranging in pairs or groups.Quantum dot strengthens film and has fluorescence quantum not of uniform size, the blue light of incidence is converted to the light of different wave length.Thus, increase the spectral range that mixed light becomes white light, the color saturation that display is shown is higher.
And in backlight module, four limits that the quantum dot being formed at light guide plate surface strengthens film need to keep certain gap with the glue frame being centered around light guide plate four limit, crimp when preventing thermal expansion.But this but can cause some blue light directly to appear from gap without quantum dot strengthens film, and there is obvious blue light leak on four limits making user can discover display.
Summary of the invention
In view of this, the object of the invention is to propose a kind of new backlight module and display unit, the blue light leak at display edge can be improved, promote vision taste.
For reaching above-mentioned purpose, the invention provides a kind of backlight module, comprising: a surface luminescence structure, there is a first surface, and luminous from this first surface; One optical diaphragm group, is attached at this first surface of this surface luminescence structure, and this optical diaphragm group has a bottom blooming piece, and is arranged at least one upper strata blooming piece on this bottom blooming piece; And an annular glue frame, around this surface luminescence structure, there is first extension extended along the direction of this first surface parallel, wherein, this bottom blooming piece extends towards this annular glue frame more relative to this upper strata blooming piece, makes this first extension cover at least one edge of this bottom blooming piece.
In above-mentioned backlight module, this surface luminescence structure comprises: a light guide plate; Multiple light source, along at least one edge arrangement of this light guide plate, this light guide plate by the ray guidance of the plurality of light source to this first surface, wherein, this annular glue frame has more one second extension, and this bottom blooming piece has a gap at a distance of this second extension on the direction of this first surface parallel.
Above-mentioned backlight module can more comprise: one covers liner, is arranged at this second extension, and this covers liner and extends along the direction of this first surface parallel, to cover at least one edge of this bottom blooming piece through this gap.
In above-mentioned backlight module, the surface of this annular glue frame is white, in order to light reflection to be returned this bottom blooming piece or this light guide plate.
In above-mentioned backlight module, the plurality of light source is multiple blue light-emitting diode.And this bottom blooming piece is quantum dot enhancing film (Quantum Dot Enhancement Film).And this upper strata blooming piece is diffusion barrier or prismatic brightness film.
Above-mentioned backlight module more comprises: a printed circuit board (PCB), is attached at the second surface in contrast to this first surface on this surface luminescence structure, in order to drive the plurality of light source.
The present invention also provides a kind of display unit, comprising: a display floater; One surface luminescence structure, luminous towards this display floater; One optical diaphragm group, is attached at the surface of this surface luminescence structure towards this display floater, has a bottom blooming piece, and is arranged at least one upper strata blooming piece on this bottom blooming piece; And an annular glue frame, around this surface luminescence structure, have one for carrying the extension of this display floater, wherein, this extension extends along the direction of this display floater parallel, wherein this bottom blooming piece extends towards this annular glue frame more relative to this upper strata blooming piece, makes this extension cover at least one edge of this bottom blooming piece.
In above-mentioned display unit, this surface luminescence structure sends blue light, and this bottom blooming piece is quantum dot enhancing film, this blue light is converted to the polychrome mixed light close to white light.
The backlight module above-mentioned according to the present invention and display unit, can prevent the edge of display from producing blue light leak, reach the effect of promoting vision taste.
Accompanying drawing explanation
Fig. 1 is the summary stereogram of the backlight module of liquid crystal display;
Fig. 2 is the sectional view of conventional backlight module;
Fig. 3 is the sectional view of the backlight module according to the embodiment of the present invention 1;
Fig. 4 is the sectional view of backlight module according to the embodiment of the present invention 2 and display floater.
Symbol description
1,2,3,4 ~ backlight module;
5 ~ display floater;
10 ~ planar luminous body; 12 ~ framework;
14 ~ housing;
21,31,41 ~ LED light source;
22,32,42 ~ light guide plate;
23,33,43 ~ optical diaphragm group;
231,331,431 ~ quantum dot strengthens film;
232,332,432 ~ upper strata blooming piece;
24,34,44 ~ glue frame;
241,341,342,441,442 ~ extension;
25,35,45 ~ metal frame;
26,36,46 ~ printed circuit board (PCB);
27 ~ fixed-bearing;
28,38,48 ~ reflectance coating;
37 ~ cover liner;
51 ~ infrabasal plate;
52 ~ upper substrate;
53 ~ lower Polarizer;
54 ~ upper Polarizer;
S ~ first surface.
Detailed description of the invention
Fig. 1 is the summary stereogram of the backlight module of liquid crystal display.As shown in Figure 1, three parts can substantially be seen from the outward appearance of backlight module 1: planar luminous body 10, framework 12, housing 14.Planar luminous body 10 towards in figure+the direction planar of Z axis is luminous.Framework 12, around four limits of planar luminous body 10, limits the X of planar luminous body 10, the position of Y direction.Housing 14 accommodates planar luminous body 10 and framework 12, and jointly limits the position of the Z-direction of planar luminous body 10 with framework 12.
Fig. 2 is the sectional view of conventional backlight module.When watching traditional backlight module from the A-A ' section of Fig. 1, as shown in Figure 2, backlight module 2 comprises: LED light source 21, light guide plate 22, optical diaphragm group 23, annular glue frame 24, metal frame 25, printed circuit board (PCB) 26, fixed-bearing 27, reflectance coating 28.Wherein, LED light source 21, light guide plate 22 correspond to the planar luminous body 10 in Fig. 1 with optical diaphragm group 23; Annular glue frame 24 corresponds to the framework 12 in Fig. 1 with fixed-bearing 27; Metal frame 25 corresponds to the housing 14 in Fig. 1.
LED light source 21 is multiple blue-ray LEDs along Y direction arrangement, and court-X-direction irradiates blue light.Light guide plate 22 is a rectangular platy structure, the blue light that sends of guiding LED light source 21, penetrates uniform planar light after making light interreflection, diffusion therein from the first surface S towards+Z-direction.Optical diaphragm group 23 be attached at light guide plate 22 first surface S, it has a bottom blooming piece 231 and is arranged at two upper strata blooming pieces 232 on this bottom blooming piece 231.This bottom blooming piece 231 is quantum dot enhancing film, in order to blue light to be converted to the polychrome mixed light close to white light.This two upper stratas blooming piece 232 then comprises such as diffusion barrier, prismatic brightness film etc.
The wherein both sides of annular glue frame 24 extend along Y direction, restriction light source 21 and light guide plate 22 are in the position of X-direction, the another both sides of annular glue frame 24 then extend along X-direction, restriction light source 21 is with light guide plate 22 in the position of Y direction, and annular glue frame 24 has more extension 241 and extends towards+X-direction.Metal frame 25 is ㄩ font at the section of XZ plane, above-mentioned LED light source 21, light guide plate 22, glue frame 24 is coated on wherein, and the bottom surface of metal frame 25 more limits the position of light guide plate 22 in Z-direction jointly with the extension 241 of annular glue frame 24.
Printed circuit board (PCB) 26 is formed with the circuit of driving LED light source 21, and is pasted on a lateral edges of annular glue frame 24 and light guide plate 22 simultaneously.Fixed-bearing 27 is overlapped on printed circuit board (PCB) 26, in order to limit the Z-direction position of light guide plate 22.And the extension 241 of annular glue frame 24 and fixed-bearing 27+plane of Z-direction is more as the position supporting and paste display floater (not shown).In addition, reflectance coating 28 be pasted on light guide plate 22-between the surface of Z-direction and the bottom surface of metal frame 25, by light towards+Z-direction reflection.
Fig. 2 be configured in making time, first can fix light guide plate 22 with annular glue frame 24 and fixed-bearing 27, then just light guide plate 22+optical diaphragm group 23 is placed on Z axis surface.Certain gap can be possessed, mutual crimp when preventing thermal expansion between the extension 241 of optical diaphragm group 23 and annular glue frame 24 or between optical diaphragm group 23 and fixed-bearing 27.But blue light leak is but caused in such gap.From in Fig. 2, there is the position not being extended any one covering of portion 241, optical diaphragm group 23 or fixed-bearing 27 in light guide plate 22 at two gap locations.Therefore blue light can directly be arrived by eye-observation when not strengthening optical diaphragm group 23 of film 231 by amount point, and reduces the vision taste of display.
Fig. 3 is the sectional view of the backlight module according to the embodiment of the present invention 1.When watching the backlight module of the embodiment of the present invention 1 from the A-A ' section of Fig. 1, as shown in Figure 3, backlight module 3 comprises: LED light source 31, light guide plate 32, optical diaphragm group 33, annular glue frame 34, metal frame 35, printed circuit board (PCB) 36, cover liner 37, reflectance coating 38.
LED light source 31 in Fig. 3, light guide plate 32, metal frame 35, reflectance coating 38 are identical with the LED light source 21 in Fig. 2, light guide plate 22, metal frame 25, reflectance coating 28 respectively, therefore these elements of not repeat specification.
Visible annular glue frame 34 has the extension 341 that extends towards+X-direction and the extension 342 extended towards-X-direction respectively in the configuration in figure 3, although the diagram of not seeing, this annular glue frame 34 also has the extension 341 extended towards+Y direction and-Y direction respectively.The feature of the embodiment of the present invention 1 is that the quantum dot of optical diaphragm group 33 bottom strengthens film 331 and more extends towards-X ,+Y and-Y direction compared with upper strata blooming piece 332, makes extension 341 can cover at least three edges of quantum dot enhancing film 331.And in the side that LED light source 31 arranges, because extension 342 at least must cover LED light source 31, if therefore court-X-direction extension further again, may rigidity be lowered and not easily be formed.Therefore extension 342 only extends to the edge of light guide plate 32, and add in addition and thinner cover liner 37, from extension 342 further past-X-direction extend, arrive the top of optical diaphragm group 33 across optical diaphragm group 33 and the gap of extension 342.In addition, when not increasing backlight module 3 integral thickness, printed circuit board (PCB) 36 is formed at the bottom surface of LED light source 31, except the thickness of extension 342 formation can be increased to improve the rigidity of extension, more can shortens the distance that quantum dot strengthens film 331 and LED light source 31.
In the present embodiment, because quantum dot strengthens the below that film 331 extends to extension 341, therefore the gap between extension 341 and optical diaphragm group 33 is at least coated with quantum dot and strengthens film 331 on light guide plate 32, the polychrome mixed light that the blue light penetrated from light guide plate 32 strengthens film 331 to I haven't seen you for ages throughput point and formed close to white light, though visually produce white light light leak also comparatively blue light leak easily make people accept.And in LED light source 31 side, cover because cover liner 37 by gap, therefore do not have blue light and spill.
Fig. 4 is the sectional view of backlight module according to the embodiment of the present invention 2 and display floater.When watching the backlight module of the embodiment of the present invention 2 from the A-A ' section of Fig. 1, as shown in the backlight module 4 of Fig. 4.Backlight module 4 comprises: LED light source 41, light guide plate 42, optical diaphragm group 43, annular glue frame 44, metal frame 45, printed circuit board (PCB) 46, reflectance coating 48.In addition, in Fig. 4 compared to the 2nd, 3 figure add display floater 5, in order to show backlight module and display floater in conjunction with time structure.Display floater 5 comprises: infrabasal plate 51, upper substrate 52, lower Polarizer 53, upper Polarizer 54.Display floater 5 be carried on the extension 441 and 442 of annular glue frame 44+plane of Z-direction on.
The extension 441 of the LED light source 41 of embodiment 2, light guide plate 42, annular glue frame 44, metal frame 45, printed circuit board (PCB) 46, reflectance coating 48 are identical with the LED light source 31 of embodiment 1, light guide plate 32, the extension 341 of annular glue frame 34, metal frame 35, printed circuit board (PCB) 36, reflectance coating 38 respectively, therefore these elements of not repeat specification.
Embodiment 2 difference from Example 1 is that the quantum dot of optical diaphragm group 43 bottom strengthens film 431 compared with upper strata blooming piece 432 except extending towards-X ,+Y ,-Y direction, and also court+X-direction extends.And the extension 442 that annular glue frame 44 extends toward-X-direction is except covering LED light source 41, further extend to the top that quantum dot strengthens film 431.Thus, even be configured with the side of LED light source 46, gap between extension 442 and optical diaphragm group 43 is also at least coated with quantum dot and strengthens film 431 on light guide plate 42, the polychrome mixed light that the blue light that light guide plate 43 is penetrated strengthens film 431 to I haven't seen you for ages throughput point and formed close to white light.
In addition, the material that annular glue frame 34,44 in embodiment 1 and 2 can use surface to be white, by the high reverse--bias characteristic of white material, the light being irradiated to annular glue frame 34,44 can be allowed again to be reflected back quantum dot and to strengthen film 331,431 or light guide plate 32,42, lower the energy of blue light and promote the taste of vision.
According to the above embodiments 1 and 2, the quantum dot of the optical diaphragm group bottom is only strengthened the below that film extends to the extension of annular glue frame by the present invention, can have and prevent the edge of display from producing blue light leak, reach the effect of promoting vision taste.Because whole optical diaphragm group must not extended to the below of extension, the thickness of the extension of annular glue frame must be too not thin, and the yield on manufacturing is higher.
Although the present invention illustrates with above-described embodiment, be not limited to this.Furthermore, do not depart under concept of the present invention and equal category being familiar with this art personage, claim must be explained to comprise the embodiment of the present invention and other distortion widely.
Claims (10)
1. a backlight module, comprising:
One surface luminescence structure, has first surface, and luminous from this first surface;
Optical diaphragm group, is attached at this first surface of this surface luminescence structure, and this optical diaphragm group has a bottom blooming piece, and is arranged at least one upper strata blooming piece on this bottom blooming piece; And
Annular glue frame, around this surface luminescence structure, has first extension extended along the direction of this first surface parallel,
Wherein, this bottom blooming piece extends towards this annular glue frame more relative to this upper strata blooming piece, makes this first extension cover at least one edge of this bottom blooming piece.
2. backlight module as claimed in claim 1, wherein this surface luminescence structure comprises:
Light guide plate;
Multiple light source, along at least one edge arrangement of this light guide plate, this light guide plate by the ray guidance of the plurality of light source to this first surface,
Wherein, this annular glue frame also has the second extension, and this bottom blooming piece has a gap at a distance of this second extension on the direction of this first surface parallel.
3. backlight module as claimed in claim 2, also comprises:
Cover liner, be arranged at this second extension, this covers liner and extends along the direction of this first surface parallel, to cover at least one edge of this bottom blooming piece through this gap.
4. backlight module as claimed in claim 2, wherein the surface of this annular glue frame is white, in order to light reflection to be returned this bottom blooming piece or this light guide plate.
5. backlight module as claimed in claim 2, wherein the plurality of light source is multiple blue light-emitting diode.
6. backlight module as claimed in claim 5, wherein this bottom blooming piece is that quantum dot strengthens film (Quantum Dot Enhancement Film).
7. backlight module as claimed in claim 5, wherein this upper strata blooming piece is diffusion barrier or prismatic brightness film.
8. backlight module as claimed in claim 2, also comprises:
Printed circuit board (PCB), is attached at the second surface in contrast to this first surface on this surface luminescence structure, in order to drive the plurality of light source.
9. a display unit, comprising:
Display floater;
One surface luminescence structure, luminous towards this display floater;
Optical diaphragm group, is attached at the surface of this surface luminescence structure towards this display floater, has a bottom blooming piece, and is arranged at least one upper strata blooming piece on this bottom blooming piece; And
Annular glue frame, around this surface luminescence structure, have one for carrying the extension of this display floater, wherein, this extension extends along the direction of this display floater parallel,
Wherein this bottom blooming piece extends towards this annular glue frame more relative to this upper strata blooming piece, makes this extension cover at least one edge of this bottom blooming piece.
10. display unit as claimed in claim 9, wherein this surface luminescence structure sends blue light, and this bottom blooming piece is quantum dot enhancing film, this blue light is converted to the polychrome mixed light close to white light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310403657.8A CN104421768B (en) | 2013-09-06 | 2013-09-06 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310403657.8A CN104421768B (en) | 2013-09-06 | 2013-09-06 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN104421768A true CN104421768A (en) | 2015-03-18 |
| CN104421768B CN104421768B (en) | 2017-09-05 |
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| CN201310403657.8A Active CN104421768B (en) | 2013-09-06 | 2013-09-06 | Backlight module and display device |
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| CN104864318A (en) * | 2015-06-12 | 2015-08-26 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN105629572A (en) * | 2016-02-02 | 2016-06-01 | 武汉华星光电技术有限公司 | Backlight module and manufacturing process thereof |
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