CN205301757U - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
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- CN205301757U CN205301757U CN201620019099.4U CN201620019099U CN205301757U CN 205301757 U CN205301757 U CN 205301757U CN 201620019099 U CN201620019099 U CN 201620019099U CN 205301757 U CN205301757 U CN 205301757U
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- light
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- backlight
- area source
- film
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Abstract
The utility model provides a backlight, wherein, the backlight includes the area source and sets up spectro -film on the play plain noodles of area source, deviating from of spectro -film the area source be formed with a plurality of beam -splitting structure on the surface, just deviating from of spectro -film the surface of area source is divided into a plurality of beam split units, every in the beam split unit beam -splitting structure can be with following the orientation of spectro -film the light of the surface incident of area source separately is the light that at least three beams transmit direction is different and the wavelength is different. The utility model provides a display device. The utility model provides an in the backlight, the spectro -film can fall into the white light light of multiple different colours, and consequently, the light that the backlight sent does not need to pass through the filter coating again and filters promptly for the colorama, can propose the luminance of high back light source.
Description
Technical field
This utility model relates to field of display devices, in particular it relates to a kind of backlight and a kind of display device including this backlight.
Background technology
Shown in Fig. 1 is the schematic diagram of a kind of common liquid crystal indicator, as shown in FIG., described liquid crystal indicator include backlight 100, array base palte 200, to box substrate 400 be encapsulated in array base palte 200 and to the liquid crystal layer 300 between box substrate 400. Being provided with color filter film on box substrate 400, as shown in FIG., described color filter film includes the color blocking block of red color resistance block R, green color blocking block G and blue color blocking tri-kinds of colors of block B.
But, this liquid crystal indicator energy consumption is higher. Therefore, the energy consumption how reducing liquid crystal indicator becomes the technical problem that this area is urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is in that to provide a kind of backlight and a kind of display device including this backlight. Described backlight and described display device have relatively low energy consumption.
As an aspect of the present utility model, a kind of backlight is provided, wherein, described backlight includes area source and the spectro-film being arranged on the exiting surface of described area source, the surface deviating from described area source of described spectro-film is formed with multiple beam-splitting structure, and the surface deviating from described area source of described spectro-film is divided into multiple spectrophotometric unit, the light incident from the surface towards described area source of described spectro-film can be split up at least three beams and launch the light that direction is different and wavelength is different by the described beam-splitting structure in each described spectrophotometric unit
Preferably, described spectro-film includes spectro-film body and described beam-splitting structure, described beam-splitting structure is formed on the surface deviating from described area source of described spectro-film body, described spectrophotometric unit includes multiple light splitting subelement, each described light splitting subelement is corresponding to the light of a kind of wavelength, each described light splitting subelement includes multiple light splitting part, at least one of described light splitting part is of a size of nanometer scale, described light splitting part includes light inclined-plane, described go out light inclined-plane and spectro-film body between the surface of described area source, there is angle, described go out light inclined-plane and described spectro-film body meet below equation towards the angle between the surface of described area source:
��=2dsin ��,
Wherein, �� pass through described in go out the wavelength of light of light inclined-plane outgoing;
D goes out the length of light inclined-plane orthographic projection on the surface deviating from described area source of described spectro-film body described in being;
�� be described in go out light inclined-plane and described spectro-film body towards the angle between the surface of described area source.
Preferably, each described spectrophotometric unit includes three described light splitting subelements, the light respectively HONGGUANG of outgoing, green glow and blue light from three described light splitting subelements.
Preferably, described beam-splitting structure and described spectro-film body are formed in one the integrative-structure obtained.
Preferably, described area source includes multiple Organic Light Emitting Diode emitted white light.
As another aspect of the present utility model, a kind of display device is provided, described display device includes display floater and backlight, wherein, described backlight is above-mentioned backlight provided by the utility model, the surface being formed with described beam-splitting structure of described spectro-film is towards described display floater, and described display floater is divided into multiple pixel cell, the corresponding described spectrophotometric unit of each pixel cell.
Preferably, by being bonded together around the sealed plastic box of described display floater between described backlight and described display floater.
Preferably, described backlight, described display floater and described sealed plastic box surround sealing chamber jointly.
Preferably, described display device also includes the viewing-angle control panel being arranged on the light emission side of described display floater, described viewing-angle control panel includes viewing angle control liquid crystal layer and controls module, described control module can provide to described viewing angle control liquid crystal layer and control voltage, and the refractive index of described viewing angle control liquid crystal layer changes with the change of described control voltage.
Preferably, described viewing angle control liquid crystal layer includes PDLC, and described control module can provide, to described viewing angle control liquid crystal layer, the threshold voltage making the described transparent state of viewing angle control liquid crystal layer.
Preferably, described control module is set to when the transparent state of the described viewing angle control liquid crystal layer of control, it is possible to do not providing opposite polarity threshold voltage to described viewing angle control liquid crystal layer in the same time.
In backlight provided by the utility model, white light can be divided into the light of multiple different colours by spectro-film, and therefore, the light that backlight sends is colourama, it is not necessary to filter then through filter coating, it is possible to improve the brightness of backlight. In other words, can obtaining the light with desired level with relatively low energy consumption, therefore, backlight provided by the utility model is more energy-conservation.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, but is not intended that restriction of the present utility model together with detailed description below. In the accompanying drawings:
Fig. 1 is the schematic diagram of existing liquid crystal indicator;
Fig. 2 is the structural representation of backlight provided by the utility model;
Fig. 3 is the structural representation of spectro-film;
Fig. 4 is the structural representation of the display device of the first embodiment provided by the utility model;
Fig. 5 is the structural representation of the display device of the second embodiment provided by the utility model;
Fig. 6 is fundamental diagram when being in narrow field-of-view mode of the viewing-angle control panel in the display device shown in Fig. 5;
Fig. 7 is fundamental diagram when being in wide viewing angle pattern of the viewing-angle control panel in the display device shown in Fig. 5.
Description of reference numerals
100: backlight 110: area source
111: Organic Light Emitting Diode 120: spectro-film
121: light splitting part 121a: go out light inclined-plane
122: spectro-film body 200: array base palte
300: liquid crystal layer 400: to box substrate
500: sealed plastic box 600: viewing-angle control panel
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains this utility model, it is not limited to this utility model.
In liquid crystal indicator shown in FIG, backlight 100 sends the light of white, when white light is by red color resistance block R, red light passes through, and the light of other colors is filtered out, when white light is by green color blocking block G, green light passes through, and the light of other colors is filtered out, when white light is by blue color blocking block B, blue ray passes through, and the light of other colors is filtered out. That is time by every kind of color blocking block, the light of 2/3rds is all had to be filtered out, it follows that utilize described color filter film can reduce display brightness, in order to reach desirable brightness, it is necessary to improve the brightness of backlight, thus adding energy consumption.
In view of this, this utility model provides a kind of backlight 100, wherein, this backlight includes area source 110 and the spectro-film 120 being arranged on the exiting surface of this area source 110, the surface deviating from area source 110 of this spectro-film is formed with multiple beam-splitting structure, and, the surface deviating from area source 110 of this spectro-film 120 is divided into multiple spectrophotometric unit, and the light incident from the surface towards area source 110 of spectro-film 120 can be split up at least three beams and launch the light that direction is different and wavelength is different by the beam-splitting structure in each described spectrophotometric unit.
It is easily understood that, the light that area source 110 sends is white light, and white light is to be mixed by the light (that is, the light that multiple color is different) that multi-wavelength is different, white light can be divided into the different light of wavelength (that is, the light that multiple color is different) by spectro-film 120. That is, each spectrophotometric unit outgoing is all the different light of multiple color, and each spectrophotometric unit can a pixel cell on corresponding display floater. It is easily understood that each pixel cell can include multiple sub-pixel unit, the multi-beam that spectrophotometric unit separates is injected in the sub-pixel in respective pixel unit respectively, such that it is able to realize colour display.
In backlight provided by the utility model, white light can be divided into the light of multiple different colours by spectro-film, and therefore, the light that backlight sends is colourama, it is not necessary to filter then through filter coating, it is possible to improve the brightness of backlight. Under identical energy consumption condition, it is about 3 times of luminosity of the display device shown in Fig. 1 including the brightness of the display device of backlight provided by the utility model. In other words, can obtaining the light with desired level with relatively low energy consumption, therefore, backlight provided by the utility model is more energy-conservation.
In this utility model, the concrete structure of the spectro-film 120 of backlight 100 not being had special restriction, as a kind of preferred implementation of the present utility model, the beam-splitting structure on spectro-film 120 can be nanometer scale. Such as, as it is shown on figure 3, spectro-film 120 includes spectro-film body 122 and described beam-splitting structure, described beam-splitting structure is formed on the surface deviating from described area source of spectro-film body 122. Described spectrophotometric unit includes multiple light splitting subelement, each described light splitting subelement is corresponding to the light of a kind of wavelength, each described light splitting subelement includes multiple light splitting part 121, this light splitting part 121 includes light inclined-plane 121a, there is angle �� in what this went out light inclined-plane 121a and spectro-film body 122, what go out light inclined-plane 121a and spectro-film body 122 meets below equation (1) towards the angle �� between the surface of described area source between the surface of described area source:
��=2dsin �� (1)
Wherein, �� pass through described in go out the wavelength of light of light inclined-plane outgoing;
D goes out the length of light inclined-plane orthographic projection on the surface deviating from described area source of described spectro-film body described in being;
�� be described in go out light inclined-plane and described spectro-film body towards the angle between the surface of described area source.
As a kind of embodiment of the present utility model, in same described light splitting subelement all light splitting parts 121 to go out light inclined-plane 121a parallel to each other, as shown in Figure 3.
In this utility model, light splitting part 121 be nanometer scale (namely, at least one size of light splitting part 121 is Nano grade), and the pixel cell in the display floater being used in combination with described backlight is usually micron dimension, accordingly, the sub-pixel unit of each pixel cell is also micron dimension. Light is gone out, it is preferable that the light splitting part 121 in each light splitting subelement is multiple, such that it is able to guarantee to be attained by desired level from the light of outgoing each light splitting subelement in order to what ensure the light of various different colours.
In embodiment shown in figure 3, spectro-film 120 is formed as a balzed grating. For a light splitting part 121, go out light inclined-plane 121a and spectro-film body 122 towards the angle �� between the surface of described area source meet below equation (1) time, in incident white light, the light that wavelength is �� can strengthen outgoing from when going out the 121a outgoing of light inclined-plane, so that the light through the sub-spectrophotometric unit including this light splitting part 121 is the light that wavelength is ��. In order to improve spectroscopical effeciency, it is preferable that multiple light splitting part 121 close-packed arrays in described spectro-film, between adjacent two light splitting parts 121, there is no gap.
It is easily understood that, the designer of described backlight can according to the wavelength X of the selected light going out the 121a outgoing of light inclined-plane from light splitting part 121 of the demand of product, further, the designer of described backlight can according to the size of pixel cell in the display floater of coupling select described in go out the length d of light inclined-plane orthographic projection on the surface deviating from described area source of described spectro-film body. When outgoing light wavelength X and described in go out the length d of light inclined-plane orthographic projection on the surface deviating from described area source of described spectro-film body selected after, can be calculated by formula (1) go out described in acquisition light inclined-plane and described spectro-film body towards the angle �� between the surface of described area source.
As a kind of preferred implementation of the present utility model, each spectrophotometric unit can include three described light splitting subelements, the light respectively HONGGUANG of outgoing, green glow and blue light from three described light splitting subelements.
For the ease of manufacturing, it is preferable that described beam-splitting structure and spectro-film body 122 are formed in one the integrative-structure obtained.
In this utility model, do not have special requirement to how forming beam-splitting structure on spectro-film body 122. For example, it is possible to be initially formed original material layer, then utilizing patterning processes to form described beam-splitting structure on a surface of original material layer, the part outside described beam-splitting structure is then correspondingly formed as spectro-film body.
In this utility model, the patterning processes forming described beam-splitting structure is not had special requirement, for instance, it is possible to use photoetching process or transfer printing process etc. can be utilized to form described beam-splitting structure.
White light in this utility model, the concrete structure of area source 110 do not had special restriction, as long as can be sent.
Such as, area source 110 can be the traditional area source including illuminating part and blooming piece etc.
In order to reduce the thickness of area source, it is preferable that as shown in Figure 2, area source 110 can include multiple Organic Light Emitting Diode 111 emitted white light.Except having relatively small thickness, the area source including multiple Organic Light Emitting Diodes 111 can also realize local dimming, so that the picture that the display device including backlight 100 provided by the utility model shows has preferably contrast.
As another aspect of the present utility model, a kind of display device is provided, as shown in Figure 4, described display device includes display floater and backlight 100, wherein, this backlight 100 is above-mentioned backlight 100 provided by the utility model, and the surface being formed with described beam-splitting structure of spectro-film 120 is towards described display floater. Described display surface is divided into multiple pixel cell, the corresponding described spectrophotometric unit of each pixel cell.
As mentioned above it is possible, included the light of multiple different colours by the light of described spectrophotometric unit outgoing, therefore, backlight provided by the utility model is utilized can to realize the colored display of display device, it is not necessary to filter coating is set in display floater again. Further, described spectro-film, to injecting the light of this spectro-film almost without absorption, such that it is able to improve the emitting brightness of backlight, reduces energy consumption.
In this utility model, the concrete structure of described display floater do not had special restriction. Such as, in the embodiment shown in the diagram, described display floater is display panels, and described display floater includes array base palte 200, to box substrate 400 be encapsulated in array base palte 200 and to the liquid crystal layer 300 between box substrate 400. It is easily understood that the light-entering surface at array base palte 200 is pasted with polaroid, and, the light output surface of box substrate 400 is also being pasted with polaroid.
Certainly, described display floater can also is that other need the display floater that could realize normal display of backlight.
In this utility model, the connected mode between backlight 100 and described display floater is not done yet concrete regulation. For example, it is possible to frame connects fixing to backlight 100 and described display floater before utilizing.
As a kind of preferred implementation of the present utility model, it is bonded together by the sealed plastic box 500 around described display floater between backlight 100 and described display floater.
Preferably, backlight 100, described display floater and sealed plastic box 500 surround sealing chamber jointly. As noted before, backlight 100 can include multiple Organic Light Emitting Diode 111 emitted white light, formed after sealing chamber between backlight 100 and described display floater, it is possible to prevent between external steam entry of backlight source 100 and described display floater, such that it is able to prevent Organic Light Emitting Diode 111 from being aoxidized by vapour corrosion, extend the service life of display device.
As the second preferred implementation of the present utility model, as shown in Figure 5, described display device also includes the viewing-angle control panel 600 being arranged on the light emission side of described display floater, this viewing-angle control panel 600 includes viewing angle control liquid crystal layer and controls module, described control module can provide to described viewing angle control liquid crystal layer and control voltage, and the refractive index of described viewing angle control liquid crystal layer changes with the change of described control voltage.
The electric field difference that the control module of viewing-angle control panel 600 provides can cause that the refractive index of described viewing angle control liquid crystal layer is different, and the refractive index of described viewing angle control liquid crystal layer difference can cause that described display device has different visual angles.
When the operator of described display device are when browsing the higher file of confidentiality, it is possible to make described display device have narrower visual angle by regulating the refractive index of viewing angle control liquid crystal layer described in described control Control of Voltage.When many individuals are when the common image watched shown by described display device, it is possible to make described display device have wider visual angle by regulating the refractive index of viewing angle control liquid crystal layer described in described control Control of Voltage.
In this utility model, the concrete material of described viewing angle control liquid crystal layer do not had special restriction. Such as, described viewing angle control liquid crystal layer can include blue phase liquid crystal.
Again such as, described viewing angle control liquid crystal layer can include PDLC (PDLC, PolymerDispersedLiquidCrystal).
Shown in Fig. 6 is fundamental diagram when being in narrow field-of-view mode of the viewing-angle control panel in the display device shown in Fig. 5. As shown in FIG., the light that now luminescent panel sends is directed through viewing-angle control panel. In order to realize this state, it is possible to apply threshold voltage to described viewing angle control liquid crystal layer, under this threshold voltage, PDLC ordered arrangement so that described viewing-angle control panel is in through state, to obtain narrower visual angle.
Shown in Fig. 7 is fundamental diagram when being in wide viewing angle pattern of the viewing-angle control panel in the display device shown in Fig. 5. In order to realize this state, it is not necessary to apply voltage to described viewing angle control liquid crystal layer, in this state, PDLC disorder distribution so that viewing-angle control panel 600 is in scattering states, to obtain wider visual angle. Further, the brightness of image watched in the angular field of view that this is wider is homogeneous so that the beholder in angular field of view all can preferably be watched impression.
Preferably, when the transparent state of the described viewing angle control liquid crystal layer of control, described control module can not provide opposite polarity threshold voltage to described viewing angle control liquid crystal layer in the same time. By providing the opposite polarity threshold voltage can so that the liquid crystal molecule of PDLC overturns 180 �� in different moment angle, such that it is able to avoid the liquid crystal molecule of PDLC aging, when removing described threshold voltage, it is possible to recover the state to disorder distribution.
For example, it is assumed that the threshold voltage of PDLC is+10V and-10V. When the transparent state of the described viewing angle control liquid crystal layer of control, when showing odd-numbered frame picture, described control module is utilized to provide the threshold voltage of+10V to described viewing angle control liquid crystal layer, when showing even frame picture, described control module is utilized to provide the threshold voltage of-10V to described viewing angle control liquid crystal layer. When showing angle and the even frame of liquid crystal molecule in viewing angle control liquid crystal layer during odd-numbered frame, the angle of the liquid crystal molecule in viewing angle control liquid crystal layer differs 180 ��, and therefore, in viewing angle control liquid crystal layer, liquid crystal molecule will not occur aging. When described control module removes described threshold voltage, in viewing angle control liquid crystal layer, liquid crystal molecule can recover the state to lack of alignment rapidly.
It is understood that embodiment of above is merely to illustrate that principle of the present utility model and the illustrative embodiments that adopts, but this utility model is not limited thereto. For those skilled in the art, when without departing from spirit of the present utility model and essence, it is possible to make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (11)
1. a backlight, it is characterized in that, described backlight includes area source and the spectro-film being arranged on the exiting surface of described area source, the surface deviating from described area source of described spectro-film is formed with multiple beam-splitting structure, and the surface deviating from described area source of described spectro-film is divided into multiple spectrophotometric unit, the light incident from the surface towards described area source of described spectro-film can be split up at least three beams and launch the light that direction is different and wavelength is different by the described beam-splitting structure in each described spectrophotometric unit.
2. backlight according to claim 1, it is characterized in that, described spectro-film includes spectro-film body and described beam-splitting structure, described beam-splitting structure is formed on the surface deviating from described area source of described spectro-film body, described spectrophotometric unit includes multiple light splitting subelement, each described light splitting subelement is corresponding to the light of a kind of wavelength, each described light splitting subelement includes multiple light splitting part, at least one of described light splitting part is of a size of nanometer scale, described light splitting part includes light inclined-plane, described go out light inclined-plane and spectro-film body between the surface of described area source, there is angle, described go out light inclined-plane and described spectro-film body meet below equation towards the angle between the surface of described area source:
��=2dsin ��,
Wherein, �� pass through described in go out the wavelength of light of light inclined-plane outgoing;
D goes out the length of light inclined-plane orthographic projection on the surface deviating from described area source of described spectro-film body described in being;
�� be described in go out light inclined-plane and described spectro-film body towards the angle between the surface of described area source.
3. backlight according to claim 2, it is characterised in that each described spectrophotometric unit includes three described light splitting subelements, the light respectively HONGGUANG of outgoing, green glow and blue light from three described light splitting subelements.
4. backlight according to claim 2, it is characterised in that described beam-splitting structure and described spectro-film body are formed in one the integrative-structure obtained.
5. backlight as claimed in any of claims 1 to 4, it is characterised in that described area source includes multiple Organic Light Emitting Diode emitted white light.
6. a display device, described display device includes display floater and backlight, it is characterized in that, described backlight is the backlight in claim 1 to 5 described in any one, the surface being formed with described beam-splitting structure of described spectro-film is towards described display floater, described display floater is divided into multiple pixel cell, the corresponding described spectrophotometric unit of each pixel cell.
7. display device according to claim 6, it is characterised in that by being bonded together around the sealed plastic box of described display floater between described backlight and described display floater.
8. display device according to claim 7, it is characterised in that described backlight, described display floater and described sealed plastic box surround sealing chamber jointly.
9. the display device according to any one in claim 6 to 8, it is characterized in that, described display device also includes the viewing-angle control panel being arranged on the light emission side of described display floater, described viewing-angle control panel includes viewing angle control liquid crystal layer and controls module, described control module can provide to described viewing angle control liquid crystal layer and control voltage, and the refractive index of described viewing angle control liquid crystal layer changes with the change of described control voltage.
10. display device according to claim 9, it is characterized in that, described viewing angle control liquid crystal layer includes PDLC, and described control module can provide, to described viewing angle control liquid crystal layer, the threshold voltage making the described transparent state of viewing angle control liquid crystal layer.
11. display device according to claim 10, it is characterised in that described control module is set to when the transparent state of the described viewing angle control liquid crystal layer of control, it is possible to do not providing opposite polarity threshold voltage to described viewing angle control liquid crystal layer in the same time.
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|---|---|---|---|
| CN201620019099.4U CN205301757U (en) | 2016-01-08 | 2016-01-08 | Backlight source and display device |
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| CN201620019099.4U CN205301757U (en) | 2016-01-08 | 2016-01-08 | Backlight source and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842737A (en) * | 2017-03-30 | 2017-06-13 | 惠科股份有限公司 | Liquid crystal display and method for improving viewing angle color difference thereof |
| WO2018040708A1 (en) * | 2016-09-05 | 2018-03-08 | 京东方科技集团股份有限公司 | Collimating light source, manufacturing method therefor, and display device |
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2016
- 2016-01-08 CN CN201620019099.4U patent/CN205301757U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018040708A1 (en) * | 2016-09-05 | 2018-03-08 | 京东方科技集团股份有限公司 | Collimating light source, manufacturing method therefor, and display device |
| CN106842737A (en) * | 2017-03-30 | 2017-06-13 | 惠科股份有限公司 | Liquid crystal display and method for improving viewing angle color difference thereof |
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