CN108132498A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN108132498A CN108132498A CN201810170822.2A CN201810170822A CN108132498A CN 108132498 A CN108132498 A CN 108132498A CN 201810170822 A CN201810170822 A CN 201810170822A CN 108132498 A CN108132498 A CN 108132498A
- Authority
- CN
- China
- Prior art keywords
- light
- switchable layer
- guide structure
- light extraction
- backlight module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
-
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
Abstract
The invention discloses a kind of backlight module and display device, including：Light guide plate, light guide plate have first side and second side, and first side is provided with light source, and second side is provided at least one switchable layer, and switchable layer has the ability switched between light transmission state and lighttight shading state；The side of switchable layer face away from light guide is provided with guide structure, and guide structure has light inputting end portion and light extraction end, and light inputting end portion presets light extraction region towards switchable layer, the connection of light extraction end.In the present invention, when switchable layer is in light transmission state, some light projected from the second side of light guide plate transmits switchable layer, and passes through light inputting end portion and inject in guide structure, then via guide structure conduction after, projected from light extraction end；Backlight module can not only provide light for display panel, can also provide light for default light extraction region, can improve the utilization rate of backlight；In addition, default light extraction region realizes that the process of light extraction is additionally powered without power supply, power consumption can be effectively reduced.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of backlight module and display device.
Background technology
Purpose shows the value of equipment to be promoted, and often integrates some additional functions on the display device.With display
Equipment be mobile phone for, mobile phone not only has basic screen display function, be also equipped with lighting function (such as flashlight function, camera shooting
Head flash function).
For realizing flashlight function on mobile phone, one high-brightness luminous device is set at the back side of mobile phone or side,
Battery of mobile phone is connect with high-brightness luminous device, and when flashlight function is opened, battery of mobile phone is powered for high-brightness luminous device,
So that high-brightness luminous device is lighted.
However, it finds in practical applications, when opening flashlight function, since battery of mobile phone will be not only on mobile phone
Backlight is powered, it is also necessary to for power flashlights, cause power consumption larger, cell-phone battery electric-charge quantity declines comparatively fast, influences battery of mobile phone
Usage time.
Invention content
The present invention is directed at least solve one of technical problem in the prior art, it is proposed that a kind of backlight module and aobvious
Showing device.
To achieve the above object, the present invention provides a kind of backlight module, including：Light guide plate, the light guide plate have extremely
A few first side and at least one second side, the first side are provided with light source, the second side be provided with to
A few switchable layer, the switchable layer have the ability switched between light transmission state and lighttight shading state；
The switchable layer is provided with guide structure backwards to the side of the light guide plate, and the guide structure has light inputting end portion
With light extraction end, the light inputting end portion presets light extraction region towards the guide structure, the light extraction end connection.
Optionally, it further includes：Frame and glue frame；
The frame includes：The frame includes：The first side wall and with the fixed second sidewall of the first side wall；
The glue frame includes fixed part, and the fixed part has third side and the 4th side, and the third side is used for
It is fixed with the first side wall, the 4th side is oppositely arranged with the second sidewall；
The end of the switchable layer between the 4th side and the second sidewall, the 4th side with it is described
Second sidewall coordinates with the fixation switchable layer.
Optionally, the default light extraction region includes：Flashlight light extraction region and flash lamp light extraction region；
The quantity of the switchable layer is two and respectively the first switchable layer and the second switchable layer, first switchable layer and
Orthographic projection of second switchable layer in the corresponding second side does not overlap；
The quantity of the guide structure is two and respectively the first guide structure and the second guide structure；
The light inputting end portion of first guide structure is towards first switchable layer, the light extraction end of first guide structure
Portion connects the flashlight light extraction region；
The light inputting end portion of second guide structure is towards second switchable layer, the light extraction end of second guide structure
Portion connects the flash lamp light extraction region.
Optionally, the switchable layer includes：Electronic-control dimming glass.
Optionally, the guide structure includes：Optical fibers.
Optionally, the light inputting end portion is in funnel-form.
Optionally, the surface of the switchable layer is fixed in the light inputting end portion of the guide structure by fixed structure.
Optionally, the fixed structure is optical cement.
Optionally, it further includes：Control module, the control module are connect with the switchable layer, for controlling the switching
Layer switches between the light transmission state and the shading state.
To achieve the above object, the present invention also provides a kind of display device, including：Backlight module as described above.
The invention has the advantages that：
The present invention provides a kind of backlight module and display device, wherein backlight module includes：Light guide plate, light guide plate have
At least one first side and at least one second side, first side are provided with light source, and second side is provided at least one
Switchable layer, switchable layer switch between light transmission state and lighttight light shield layer；The side of switchable layer face away from light guide is provided with light
Guide structure, guide structure have light inputting end portion and light extraction end, and light inputting end portion presets light extraction towards switchable layer, the connection of light extraction end
Region.In the present invention, when switchable layer is in light transmission state, some light projected from the second side of light guide plate transmits switching
Layer, and passes through light inputting end portion and is incident upon in guide structure, then via guide structure conduction after, projected from light extraction end；It should
Backlight module can not only provide light for display panel, can also provide light for default light extraction region, can improve the utilization of backlight
Rate；In addition, the default light extraction region realizes that process of light extraction only relies on the light that existing light source provides, without power supply additionally into
Row power supply, compared to the prior art, can effectively reduce power consumption.
Description of the drawings
Fig. 1 is the structure diagram of a kind of backlight module that the embodiment of the present invention one provides；
Fig. 2 is the light extraction light path schematic diagram in backlight module shown in Fig. 1；
Fig. 3 is the schematic diagram that frame and glue frame are coordinated to fix switchable layer in the present invention；
Fig. 4 is guide structure and the schematic diagram of switchable layer junction in the present invention；
Fig. 5 is a kind of structure diagram of backlight module provided by Embodiment 2 of the present invention.
Specific embodiment
For those skilled in the art is made to more fully understand technical scheme of the present invention, the present invention is carried below in conjunction with the accompanying drawings
A kind of backlight module and display device supplied is described in detail.
Fig. 1 is the structure diagram of a kind of backlight module that the embodiment of the present invention one provides, and Fig. 2 is backlight mould shown in Fig. 1
Light extraction light path schematic diagram in group, as depicted in figs. 1 and 2, which includes：Light guide plate 1, light source 2, switchable layer 3 and light
Guide structure 4；Wherein light guide plate 1 has at least one first side 1a and at least one second side 1b；Light source 2 is set to leaded light
The first side 1a of plate 1, switchable layer 3 are set to the second side 1b of light guide plate 1；Guide structure 4 is located at switchable layer 3 backwards to guide-lighting
The side of plate 1, guide structure 4 have light inputting end portion 4a and light extraction end 4b, light inputting end portion 4a towards switchable layer 3, light extraction end
Light extraction region 5 is preset in 4b connections；Switchable layer 3 has the ability switched between light transmission state and lighttight shading state, light guide knot
Structure 4 is used for from the light conduction that light inputting end portion 4a is injected to light extraction end 4b, and so that light is penetrated from default light extraction region 5
Go out.
With continued reference to shown in Fig. 2, light source 2 sends out entering in light guide plate 1 by first side 1a for light, which part light
Scattering occurs under the action of site and the side (upper surface of light guide plate 1 in Fig. 2) from light guide plate 1 towards display panel is penetrated
Go out, to provide light to display panel；Another part light is projected from the side of light guide plate 1.That is the second side 1b of light guide plate 1
There are light injections.
Wherein, when switchable layer 3 is in light transmission state, from the second side 1b some light transmission switchable layers 3 projected and lead to
Light inputting end portion 4a is crossed to be incident upon in guide structure 4, then via 4 conduction of guide structure after, from light extraction end 4b project.
When switchable layer 3 is in shading state, from second side 1b project light can not by switchable layer 3, guide structure 4
Light extraction end 4b dull threads project.
In the prior art, the light that the side of light guide plate 1 is projected is absorbed positioned at surrounding structure, and of the invention
In the light projected the side of light guide plate collected by guide structure 4, and conducted to default light extraction region 5, for setting out in advance
Light region 5 sends out the light of certain brightness, so as to improve the utilization rate of backlight.In addition, light extraction is realized in the default light extraction region 5
Process only relies on the light that existing light source 2 provides, and is additionally powered without power supply, compared to the prior art, can effectively subtract
Low power consumption.
It should be noted that the quantity that can set the first side 1a of light source 2 in the present invention on light guide plate 1 can be 1
Or it is multiple, the quantity that can set the second side 1b of switchable layer 3 can be one or more, what each second side 1b can be set
The quantity of switchable layer 3 can be one or more, and first side 1a, second side 1b quantity are 1 in attached drawing, second side
1b set a switchable layer 3 situation, only play the role of it is exemplary, will not to technical scheme of the present invention generate limitation.
Optionally, switchable layer 3 includes：Electronic-control dimming glass, electronic-control dimming glass include layer glass and positioned at two
Liquid crystal layer and electrode layer (not shown) between the glass of side；When no applied voltage on electrode layer, liquid crystal molecule can be presented and not advised
Spread state then, the shading state of electronic-control dimming glass presentation at this time；After certain voltage is applied on electrode layer, liquid crystal molecule is presented
Proper alignment, light can be with free penetrating, the light transmission states of electronic-control dimming glass presentation at this time.
Optionally, guide structure 4 includes：Optical fibers.Optical fibers are mainly with quartzy (or high molecular material) for raw material
It is made, there is the skin-core structure of different refractivity, light conduction is realized using cortex total reflection effect.In the present invention, when adopting
During by the use of optical fibers as guide structure, since optical fibers have high soft malleability, thus optical fibers can be arranged arbitrarily, at this time
Default light extraction region 5 also can arbitrarily be designed according to the overall structure of backlight module so that design is more open, and shape is more only
It is special.
In the present invention, a guide structure 4 can include one or more optical fibers.When a guide structure 4 includes
During multiple optical fibers, the light inputting end portion 4a of multiple optical fibers corresponds respectively to the different location of switchable layer 3, multiple guiding fibers
The light extraction end 4b convergences of dimension are a light extraction end 4b, i.e. a guide structure 4 goes out with multiple light inputting end portion 4a and one
Light end 4b can effectively promote the emitting brightness at the 4b of light extraction end at this time.It should be noted that multiple optical fibers in attached drawing
Wire laying mode only play the role of it is schematic, will not to technical scheme of the present invention generate limitation.In practical applications, this is more
The wire laying mode of a optical fibers can be carried out designing accordingly according to the overall structure of backlight module, be adjusted.
In addition, above-mentioned switchable layer 3 includes electronic-control dimming glass, guide structure 4 includes the situation of optical fibers, only this hair
A kind of concrete scheme in bright will not generate limitation to technical scheme of the present invention.In the present invention, switchable layer 3 can be with
The component that light transmission state and shading state switch over can be carried out for other, guide structure 4 can also be that other can carry out light
The component of conduction, no longer illustrates one by one herein.
Fig. 3 is the schematic diagram that frame and glue frame are coordinated to fix switchable layer in the present invention, as shown in figure 3, backlight mould
Group further includes：Frame 7 and glue frame 8；Wherein, frame 7 includes：The first side wall 7a and with the fixed second sidewalls of the first side wall 7a
7b；Glue frame 8 includes fixed part, and fixed part has third side 8a and the 4th side 8b, and third side 8a is used for and the first side wall
7a is fixed, and the 4th side 8b and second sidewall 7b is oppositely arranged, and the end of switchable layer 3 is located at the 4th side 8b and second sidewall 7b
Between, the 4th side 8b and second sidewall 7b coordinates to fix switchable layer 3.In the present invention, it is only necessary to existing 7 structure of frame
It is designed, is allowed to have above-mentioned second sidewall 7b, and pass through second sidewall 7b and coordinated with glue frame 8, it can be achieved that switching
The end of layer 3 is clamped, is fixed, without additional fixed component.
Fig. 4 is guide structure and the schematic diagram of switchable layer junction in the present invention, as shown in figure 4, as in the present invention
A kind of alternative, the light inputting end portion 4a of guide structure 4 are fixed on the surface of switchable layer 3 by fixed structure 9, can effectively avoid
Guide structure 4 is subjected to displacement in use.Preferably, fixed structure 9 is optical cement (Optically Clear
Adhesive, abbreviation OCA), optical cement has the characteristics that high viscosity, high transmittance, low haze, special using the high viscosity of optical cement
Point is, it can be achieved that guide structure 4 and switchable layer 3 are securely fixed together；The characteristics of high transmittance and low haze of optical cement,
Attenuation of the light in communication process can be reduced, ensures to be incident to the amount of light of guide structure 4.
In this embodiment, it is preferred that the light inputting end portion 4a of guide structure 4 is in funnel-form, the large scale of light inputting end portion 4a
Light inlet can effectively increase the facing area of guide structure 4 and switchable layer 3, and light in guide structure 4 is incident to so as to be promoted
Quantity, ensure the emitting brightness of light extraction end 4b.
Optionally, backlight module further includes：Control module 6, control module 6 are connect with each switchable layer 3, are respectively cut for controlling
It changes layer 3 and switches between light transmission state and shading state.It should be noted that control module 6 is located at the situation on frame 7 in attached drawing,
Only play the role of it is schematic, will not to technical scheme of the present invention generate limitation.
The embodiment of the present invention one provides a kind of backlight module, including：Light guide plate, light guide plate have at least one first side
Face and at least one second side, first side are provided with light source, and second side is provided at least one switchable layer, and switchable layer exists
Switch between light transmission state and lighttight light shield layer；The side of switchable layer face away from light guide is provided with guide structure, guide structure
With light inputting end portion and light extraction end, light inputting end portion presets light extraction region towards switchable layer, the connection of light extraction end.In the present invention
In, when switchable layer is in light transmission state, light can not only be provided for display panel by being set to the light source of first side, simultaneously also
Light can be provided for default light extraction region, so as to improve the utilization rate of light source.In addition, light extraction is realized in the default light extraction region
Process only relies on the light that existing light source provides, and is additionally powered without power supply, compared to the prior art, can effectively reduce
Power consumption.
Fig. 5 is a kind of structure diagram of backlight module provided by Embodiment 2 of the present invention, as shown in figure 5, the present embodiment
For a kind of specific embodiment based on the backlight module provided in above-described embodiment one, wherein, default light extraction region includes：Hand
Torch light extraction region 501 and flash lamp light extraction region 502.
Flashlight light extraction region 501 in the present invention refers to that display device carries out the area of light extraction when realizing flashlight function
Domain, flash lamp light extraction region 502 refer to that display device carries out the region of light extraction when realizing flash lamp function.
The quantity of switchable layer is two and respectively the first switchable layer 301 and the second switchable layer 302, the first switchable layer 301
It is not overlapped with orthographic projection of second switchable layer 302 on corresponding second side 1b.
The quantity of guide structure is two and respectively the first guide structure 401 and the second guide structure 402；First light guide
The light inputting end portion 4a of structure 401 goes out towards the first switchable layer 301, the light extraction end 4b connection flashlights of the first guide structure 401
Light region 501；Light inputting end portion 4a the second switchable layers 302 of direction of second guide structure 402, the light extraction of the second guide structure 402
End 4b connection flash lamp light extractions region 502.
When display device opens flashlight function, control module 6 controls the first switchable layer 301 to be switched to by shading state
Light state, some light that second side 1b is projected transmit the first switchable layer 301 and are incident upon the first guide structure 401, the first light
Light is projected in incident light conduction to flashlight light extraction region 501, flashlight light extraction region 501 by guide structure 401；Work as display
When device opens flash lamp function, control module 6 controls the second switchable layer 302 to switch to light transmission state, what second side 1b was projected
Some light transmits the second switchable layer 302 and is simultaneously incident upon the second guide structure 402, and the second guide structure 402 is by incident light
Light is projected in conduction to flash lamp light extraction region 502, flash lamp light extraction region 502.
It should be noted that in practical applications when light source 2 is lighted, the emitting brightness in 1 each face of light guide plate about exists
10000nit, the sufficient brightness is to support flashlight function and the required brightness demand of flash lamp function.
Certainly, in practical applications, multiple default light extraction regions can be also set according to actual needs to realize it is multiple not
Congenerous；Accordingly, it is desirable to corresponding multiple switchable layers and guide structure, concrete condition is set to be not described in detail herein.
The embodiment of the present invention three provides a kind of display device, which includes backlight module and display panel,
The backlight module provided in above-described embodiment one or embodiment two can be used in middle backlight module, specifically describes and can be found in aforementioned implementation
Content in example one and embodiment two, details are not described herein again.
Display device in the present invention can be that television set, mobile phone, laptop, navigator, tablet etc. have display
The equipment of function.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of backlight module, which is characterized in that including：Light guide plate, the light guide plate is at least one first side and extremely
A few second side, the first side are provided with light source, and the second side is provided at least one switchable layer, described to cut
Changing layer has the ability switched between light transmission state and lighttight shading state；
The switchable layer is provided with guide structure backwards to the side of the light guide plate, and the guide structure has light inputting end portion and goes out
Light end, the light inputting end portion preset light extraction region towards the switchable layer, the light extraction end connection.
2. backlight module according to claim 1, which is characterized in that further include：Frame and glue frame；
The frame includes：The first side wall and with the fixed second sidewall of the first side wall；
The glue frame includes fixed part, and the fixed part has third side and the 4th side, and the third side is used for and institute
It states the first side wall to fix, the 4th side is oppositely arranged with the second sidewall；
The end of the switchable layer is between the 4th side and the second sidewall, the 4th side and described second
Side wall coordinates with the fixation switchable layer.
3. backlight module according to claim 1, which is characterized in that the default light extraction region includes：Flashlight light extraction
Region and flash lamp light extraction region；
The quantity of the switchable layer is two and respectively the first switchable layer and the second switchable layer, first switchable layer and described
Orthographic projection of second switchable layer in the corresponding second side does not overlap；
The quantity of the guide structure is two and respectively the first guide structure and the second guide structure；
The light inputting end portion of first guide structure connects towards first switchable layer, the light extraction end of first guide structure
Connect the flashlight light extraction region；
The light inputting end portion of second guide structure connects towards second switchable layer, the light extraction end of second guide structure
Connect the flash lamp light extraction region.
4. backlight module according to claim 1, which is characterized in that the switchable layer includes：Electronic-control dimming glass.
5. backlight module according to claim 1, which is characterized in that the guide structure includes：Optical fibers.
6. backlight module according to claim 1, which is characterized in that the light inputting end portion is in funnel-form.
7. backlight module according to claim 1, which is characterized in that the light inputting end portion of the guide structure passes through fixed knot
Structure is fixed on the surface of the switchable layer.
8. backlight module according to claim 7, which is characterized in that the fixed structure includes：Optical cement.
9. according to backlight module according to any one of claims 1-8, which is characterized in that further include：Control module, the control
Module is connect with the switchable layer, for the switchable layer to be controlled to switch between the light transmission state and the shading state.
10. a kind of display device, which is characterized in that including：Backlight module as described in any in the claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170822.2A CN108132498B (en) | 2018-03-01 | 2018-03-01 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170822.2A CN108132498B (en) | 2018-03-01 | 2018-03-01 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108132498A true CN108132498A (en) | 2018-06-08 |
| CN108132498B CN108132498B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810170822.2A Active CN108132498B (en) | 2018-03-01 | 2018-03-01 | Backlight module and display device |
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| CN203442607U (en) * | 2013-09-05 | 2014-02-19 | 西安Tcl软件开发有限公司 | Edge-in-type backlight structure and liquid crystal module |
| CN104696887A (en) * | 2015-03-26 | 2015-06-10 | 合肥鑫晟光电科技有限公司 | Light guide plate, backlight module, display device and display control system |
| US20150279835A1 (en) * | 2014-04-01 | 2015-10-01 | Seiko Epson Corporation | Electro-optical device, electronic apparatus and semiconductor device |
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| CN1093814A (en) * | 1994-01-27 | 1994-10-19 | 匡敖生 | Photoconductive indicator |
| CN101464753A (en) * | 2007-12-19 | 2009-06-24 | 索尼株式会社 | Display device |
| CN102563401A (en) * | 2010-09-27 | 2012-07-11 | 索尼公司 | Light source device and stereoscopic display device |
| CN102540571A (en) * | 2012-02-16 | 2012-07-04 | 深圳市华星光电技术有限公司 | Liquid crystal display module with projection function and liquid crystal display device |
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| CN108132498B (en) | 2020-04-17 |
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