CN106597747A - Backlight source, display substrate and display apparatus - Google Patents
Backlight source, display substrate and display apparatus Download PDFInfo
- Publication number
- CN106597747A CN106597747A CN201710001273.1A CN201710001273A CN106597747A CN 106597747 A CN106597747 A CN 106597747A CN 201710001273 A CN201710001273 A CN 201710001273A CN 106597747 A CN106597747 A CN 106597747A
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- light
- layer
- quantum dot
- display
- backlight
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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
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a backlight source, a display substrate and a display apparatus, and belongs to the display technology field. The backlight source comprises a light guide plate, an ultraviolet light generator arranged on at least one light entering surface of the light guide plate, multiple mutually-independent quantum dot light-emitting units arranged on one side of the light entering surface of the light guide plate and. The quantum dot light-emitting units can emit light with different colors through stimulation of ultraviolet light emitted from the ultraviolet light generator, and the light with different colors can be mixed to become white light. The technical solution enables the display apparatus to have a higher color gamut and then enables the display quality of the display apparatus to be improved.
Description
Technical field
The present invention relates to display technology field, particularly relates to a kind of backlight, display base plate and display device.
Background technology
Traditional display backlight source is mostly using the light-emitting mode of " blue light-emitting diode+yellow fluorescent powder ", although
White light can be produced, but shortage HONGGUANG and green glow are originated and cause colour mixture more difficult, cause the color domain coverage ratio of display inclined
Low, backlight conversion efficiency is not high.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of backlight, display base plate and display device, can make display
Device obtains higher colour gamut, and then improves the display quality of display device.
To solve above-mentioned technical problem, it is as follows that embodiments of the invention provide technical scheme：
On the one hand, there is provided a kind of backlight, including：
Light guide plate；
It is arranged on the ultraviolet light generator of at least one incidence surface of the light guide plate；
It is arranged on the exiting surface side of the light guide plate, separate multiple quantum dot light emitting units, the plurality of amount
Son point luminescence unit can send the light of different colours under the ultraviolet excitation that the ultraviolet light generator sends, and it is described not
White light can be mixed into the light of color.
Further, the backlight also includes：
Diffusion layer on the light guide plate；
Light-collecting layer on the diffusion layer；
Wherein, the plurality of quantum dot light emitting unit is located on the light-collecting layer.
Further, it is spaced between predeterminable range, and adjacent quantum dot luminescence unit between adjacent quantum dot luminescence unit
It is not provided with black matrix.
Further, the light guide plate is using polymetylmethacrylate, polycarbonate, polythene PE, poly-
Propylene PP, polyethylene terephtalate or polyimides PI make.
The embodiment of the present invention additionally provides a kind of display base plate, including backlight as above, also includes：
Cover the flatness layer of the plurality of quantum dot light emitting unit；
Array circuit layer on the flatness layer.
Further, the flatness layer is multiplexed with the polarizing layer of the light transmission for only allowing default polarization direction.
The embodiment of the present invention additionally provides a kind of display device, including backlight as above and display floater.
Further, the display floater includes opposite substrate, the Yi Jiwei of display base plate and the display base plate to box
Liquid crystal cell between the display base plate and the opposite substrate, the light guide plate is multiplexed with the substrate base of the display base plate
Plate；
The display base plate includes covering the flatness layer of the plurality of quantum dot light emitting unit and on the flatness layer
Array circuit layer.
Further, the flatness layer is multiplexed with the first polarizing layer of the light transmission for only allowing default polarization direction；
The opposite substrate includes underlay substrate and the second polarizing layer being arranged on the underlay substrate, and described first is inclined
The light transmission shaft of photosphere is vertical with the light transmission shaft of second polarizing layer.
Further, the display device also includes the ultraviolet light filter layer being arranged on the opposite substrate.
Embodiments of the invention have the advantages that：
In such scheme, due to the emission spectrum and colour purity of quantum dot can be controlled by controlling quantum dot granular size
Spend, therefore the backlight of the present embodiment is lighted using light source activation quantum dot light emitting unit, so can be by control
The size precise control quantum point luminescence unit of quantum dot granule sends the coordinate of color, makes using the present embodiment backlight
Display device obtains higher colour gamut, and then improves the display quality of display device.
Description of the drawings
Fig. 1 is the structural representation of embodiment of the present invention display base plate；
Fig. 2 and Fig. 3 is the structural representation of embodiment of the present invention display device.
Reference
The polarizing layer of 1 ultraviolet light generator, 2 light guide plate, 3 diffusion layer, 4 light-collecting layer 5 first
The green quantum dot luminescence unit of 6 reflection 7 red quantum point luminescence unit of site 8
The polarizing layer of 9 11 underlay substrate of blue 10 liquid crystal cell of quantum dot luminescence unit 12 second
The passivation layer of 13 ultraviolet light filter layer, 14 public electrode, 15 gate insulation layer, 16 grid 17
The active layer 21 of 18 pixel electrode, 19 source electrode 20 drains
Specific embodiment
Technical problem, technical scheme and advantage to be solved embodiments of the invention is clearer, below in conjunction with
Drawings and the specific embodiments are described in detail.
Embodiments of the invention for display in prior art color domain coverage ratio is low, backlight conversion efficiency is not high
Problem, there is provided a kind of backlight, display base plate and display device, can make display device obtain higher colour gamut, and then improve
The display quality of display device.
Embodiment one
The present embodiment provides a kind of backlight, including：
Light guide plate；
It is arranged on the ultraviolet light generator of at least one incidence surface of the light guide plate；
It is arranged on the exiting surface side of the light guide plate, separate multiple quantum dot light emitting units, the plurality of amount
Son point luminescence unit can send the light of different colours under the ultraviolet excitation that the ultraviolet light generator sends, and it is described not
White light can be mixed into the light of color.
In the present embodiment, due to the emission spectrum and colour purity of quantum dot can be controlled by controlling quantum dot granular size
Spend, therefore the backlight of the present embodiment is lighted using light source activation quantum dot light emitting unit, so can be by control
The size precise control quantum point luminescence unit of quantum dot granule sends the coordinate of color, makes using the present embodiment backlight
Display device obtains higher colour gamut, and then improves the display quality of display device.It is shorter additionally, due to the wavelength of ultraviolet light, profit
Carried out with ultraviolet excitation quantum dot it is luminous in hgher efficiency, therefore, light source is the ultraviolet light generator that can send ultraviolet light.
Further, the backlight also includes：
Diffusion layer on the light guide plate；
Light-collecting layer on the diffusion layer；
Wherein, the plurality of quantum dot light emitting unit is located on the light-collecting layer.The light that so light source sends is through guide-lighting
Diffusion layer is reached after plate, the equalizing light rays of light guide plate outgoing can be made, then through light-collecting layer, light-collecting layer can cause process
The light of diffusion layer is irradiated on quantum dot light emitting unit.
Further, it is spaced between predeterminable range, and adjacent quantum dot luminescence unit between adjacent quantum dot luminescence unit
It is not provided with black matrix.Because light source is ultraviolet light generator, because ultraviolet light is black light, therefore, send out in adjacent quantum dot
When being spaced predeterminable range between light unit, block that light source emits beam black can be designed no longer between quantum dot light emitting unit
Matrix.
Further, the light guide plate one side opposite with exiting surface is provided with multiple reflection sites, can be to inciding leaded light
Light in plate is reflected, and realizes the transmission of light that light source sends in light guide plate, and reflection site can be circular, square
The shapes such as shape, triangle, it is preferable that in the transmission direction of light, the size for reflecting site gradually increases.
Further, the light guide plate is using polymetylmethacrylate, polycarbonate, polythene PE, poly-
Propylene PP, polyethylene terephtalate or polyimides PI make.Backlight can be so caused to have certain
Suppleness so that backlight can bend.
In specific embodiment, multiple quantum dot light emitting units include the first quantum dot light emitting unit, the second quantum dot light emitting
Unit and the 3rd quantum dot light emitting unit, the first quantum dot light emitting unit, the second quantum dot light emitting unit and the 3rd quantum
Point luminescence unit excites the monochromatic light of the lower monochromatic light for sending the first color respectively, the second color in the light that the light source sends
With the monochromatic light of the 3rd color, the first color, the second color are different with the 3rd color, and the monochromatic light of the first color, the second face
The monochromatic light of the monochromatic light of color and the 3rd color can be mixed into white light.Specifically, the first color, the second color and the 3rd color
Red, green, blue can be respectively.
Embodiment two
The present embodiment additionally provides a kind of display base plate, including backlight as above, also includes：
Cover the flatness layer of the plurality of quantum dot light emitting unit；
Array circuit layer on the flatness layer.
In one specific embodiment, as shown in figure 1, display base plate includes underlay substrate, the redness being formed on underlay substrate
Quantum dot light emitting unit 7, Green Blue quantum dot light emitting unit (not shown) and blue quantum dot luminescence unit (not shown),
The first polarisation is coated with red quantum point luminescence unit, Green Blue quantum dot light emitting unit and blue quantum dot luminescence unit
Layer 5, the first polarizing layer only allows the light transmission of default polarization direction, while planarization can be played a part of.In the first polarisation
The grid 16 of public electrode 14 and thin film transistor (TFT) is formed with layer 5, on the grid 16 of public electrode 14 and thin film transistor (TFT)
Gate insulation layer 15 is coated with, active layer 20, source electrode 19 and the drain electrode 21 of thin film transistor (TFT) is formed with gate insulation layer 15, thin
Passivation layer 17 is coated with the active layer 20 of film transistor, source electrode 19 and drain electrode 21, pixel electrode 18 is provided with passivation layer 17,
Pixel electrode 18 is connected by the via through passivation layer 17 with the drain electrode 21 of thin film transistor (TFT).
In the present embodiment, flatness layer is multiplexed with the first polarizing layer 5 of the light transmission for only allowing default polarization direction, so may be used
To simplify the structure of display base plate, the thickness of display base plate is reduced.
In the present embodiment, the integrated quantum dot light emitting unit in display base plate, due to passing through to control quantum dot granule
Size is controlling the emission spectrum and excitation of quantum dot, therefore the display base plate of the present embodiment is sent out using light source activation quantum dot
Being lighted, the size precise control quantum point luminescence unit that can so pass through control quantum dot granule be sent light unit
The coordinate of color, makes to obtain higher colour gamut using the display device of the present embodiment display base plate, and then improves display device
Display quality.It is shorter additionally, due to the wavelength of ultraviolet light, carried out using ultraviolet excitation quantum dot it is luminous in hgher efficiency, because
This, light source is the ultraviolet light generator that can send ultraviolet light.
And display base plate can be formed on backlight, i.e., the underlay substrate of display base plate is multiplexed the leaded light of backlight
Plate, when the light guide plate of backlight is made using PMMA, PC, PE, PP, PET or PI, enables to display base plate and has necessarily
Suppleness so that display base plate can bend.
Embodiment three
Present embodiments provide a kind of display device, including backlight as above and display floater.
As shown in Fig. 2 backlight includes light guide plate 2；The ultraviolet light for being arranged at least one incidence surface of light guide plate 2 occurs
Device 1, ultraviolet light generator 1 can be arranged on an incidence surface of light guide plate 2, can also be arranged on light guide plate 2 it is multiple enter
On bright finish, ultraviolet light generator 1 can send ultraviolet light；Diffusion layer 3 on light guide plate 2；Light harvesting on diffusion layer 3
Layer 4；It is arranged on the exiting surface side of light guide plate 2, separate multiple quantum dot light emitting units (not shown), multiple quantum dots
Luminescence unit can send the light of different colours, and the light of different colours under the ultraviolet excitation that ultraviolet light generator 1 sends
White light can be mixed into.
The ultraviolet light that ultraviolet light generator 1 sends reaches diffusion layer 3 after light guide plate 2, can make the outgoing of light guide plate 2
Equalizing light rays, then through light-collecting layer 4, light-collecting layer 4 can cause the light through diffusion layer 3 to be irradiated to quantum dot light emitting list
In unit.
Further, as shown in figure 3, the display floater of the display device of the present embodiment includes display base plate and shows base
Liquid crystal cell 10 of the plate to the opposite substrate of box and between the display base plate and the opposite substrate, wherein, backlight
Light guide plate 2 be multiplexed with the underlay substrate of the display base plate；The one side opposite with exiting surface of light guide plate 2 is provided with multiple reflections
Site 6, can reflect the light incided in light guide plate, realize the transmission of light that light source sends in light guide plate,
Reflection site 6 can be the shapes such as circle, rectangle, triangle, it is preferable that in the transmission direction of light, reflect the chi of site 6
It is very little gradually to increase.The light guide plate be using polymetylmethacrylate, polycarbonate, polythene PE, polypropylene PP,
Polyethylene terephtalate or polyimides PI make.Backlight and display base plate can be so caused to have certain
Suppleness so that backlight and display base plate can bend.
As shown in figure 3, being provided with diffusion layer 3 on light guide plate 2, light-collecting layer 4 is provided with diffusion layer 3, in light-collecting layer 4
On be provided with red quantum point luminescence unit 7, green quantum dot luminescence unit 8 and blue quantum dot luminescence unit 9, in amount of red
The first polarizing layer 5 is provided with son point luminescence unit 7, green quantum dot luminescence unit 8 and blue quantum dot luminescence unit 9, the
One polarizing layer 5 may also operate as the effect for planarizing, and array circuit layer (not shown) is provided with the first polarizing layer 5.
Further, it is spaced between predeterminable range, and adjacent quantum dot luminescence unit between adjacent quantum dot luminescence unit
It is not provided with black matrix.Because light source is ultraviolet light generator, because ultraviolet light is black light, therefore, send out in adjacent quantum dot
When being spaced predeterminable range between light unit, block that light source emits beam black can be designed no longer between quantum dot light emitting unit
Matrix.
In the present embodiment, light guide plate is multiplexed with the underlay substrate of the display base plate, can so simplify display device
Structure, reduces the thickness of display device.
As shown in figure 3, opposite substrate includes underlay substrate 11, the second polarizing layer 12 on underlay substrate 11 and is located at
Ultraviolet light filter layer 13 on second polarizing layer 12.The light transmission shaft of first polarizing layer 5 is saturating with second polarizing layer 12
Optical axis is vertical.
In order to the UV light permeability display floater for preventing ultraviolet light generator 1 from sending brings injury to human body, to base
Ultraviolet light filter layer 13 is additionally provided with plate, ultraviolet light can be filtered out.Wherein, the polarizing layer 12 of ultraviolet light filter layer 13 and second
Position on opposite substrate does not limit, and ultraviolet light filter layer and the second polarizing layer can be all located at opposite substrate and dorsad show
The side of substrate, can also be all located at side of the opposite substrate towards display base plate, can also be that one of them is located to base
To the side of display base plate, another is located at side of the opposite substrate towards display base plate to backboard.
Further, the underlay substrate 11 of opposite substrate can be made using PMMA, PC, PE, PP, PET or PI, so
Enable to opposite substrate and there is certain suppleness so that display device can bend.
When display device is shown, the ultraviolet light that ultraviolet light generator 1 sends reaches diffusion layer after light guide plate 2
3, then be irradiated on quantum dot light emitting unit through light-collecting layer 4, the excitated red quantum dot light emitting unit 7 of difference, green quantum dot
Luminescence unit 8 and blue quantum dot luminescence unit 9 send HONGGUANG, green glow and blue light, and HONGGUANG, green glow and blue light can be mixed into white
Light.
In the present embodiment, due to the emission spectrum and colour purity of quantum dot can be controlled by controlling quantum dot granular size
Spend, therefore the backlight of the present embodiment is lighted using light source activation quantum dot light emitting unit, so can be by control
The size precise control quantum point luminescence unit of quantum dot granule sends the coordinate of color, makes using the present embodiment backlight
Display device obtains higher colour gamut, and then improves the display quality of display device.It is shorter additionally, due to the wavelength of ultraviolet light, profit
Carried out with ultraviolet excitation quantum dot it is luminous in hgher efficiency, therefore, light source is the ultraviolet light generator that can send ultraviolet light.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of backlight, it is characterised in that include：
Light guide plate；
It is arranged on the ultraviolet light generator of at least one incidence surface of the light guide plate；
It is arranged on the exiting surface side of the light guide plate, separate multiple quantum dot light emitting units, the plurality of quantum dot
Luminescence unit can send the light of different colours, and the different face under the ultraviolet excitation that the ultraviolet light generator sends
The light of color can be mixed into white light.
2. backlight according to claim 1, it is characterised in that the backlight also includes：
Diffusion layer on the light guide plate；
Light-collecting layer on the diffusion layer；
Wherein, the plurality of quantum dot light emitting unit is located on the light-collecting layer.
3. backlight according to claim 1, it is characterised in that be spaced between adjacent quantum dot luminescence unit it is default away from
From, and it is not provided with black matrix between adjacent quantum dot luminescence unit.
4. backlight according to claim 1, it is characterised in that the light guide plate is to adopt polymethyl methacrylate
PMMA, polycarbonate, polythene PE, polypropylene PP, polyethylene terephtalate or polyimides PI make.
5. a kind of display base plate, it is characterised in that include the backlight as any one of claim 1-4, also include：
Cover the flatness layer of the plurality of quantum dot light emitting unit；
Array circuit layer on the flatness layer.
6. display base plate according to claim 5, it is characterised in that the flatness layer is multiplexed with and only allow default polarization side
To light transmission polarizing layer.
7. a kind of display device, it is characterised in that include the backlight and display surface as any one of claim 1-4
Plate.
8. display device according to claim 7, it is characterised in that the display floater includes display base plate and described
Liquid crystal cell of the display base plate to the opposite substrate of box and between the display base plate and the opposite substrate, it is described to lead
Tabula rasa is multiplexed with the underlay substrate of the display base plate；
The display base plate includes covering the flatness layer and the battle array on the flatness layer of the plurality of quantum dot light emitting unit
Column circuits layer.
9. display device according to claim 8, it is characterised in that the flatness layer is multiplexed with and only allow default polarization side
To light transmission the first polarizing layer；
The opposite substrate includes underlay substrate and the second polarizing layer being arranged on the underlay substrate, first polarizing layer
Light transmission shaft it is vertical with the light transmission shaft of second polarizing layer.
10. display device according to claim 8, it is characterised in that it is described right that the display device also includes being arranged on
To the ultraviolet light filter layer on substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001273.1A CN106597747A (en) | 2017-01-03 | 2017-01-03 | Backlight source, display substrate and display apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001273.1A CN106597747A (en) | 2017-01-03 | 2017-01-03 | Backlight source, display substrate and display apparatus |
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| CN106597747A true CN106597747A (en) | 2017-04-26 |
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| CN201710001273.1A Pending CN106597747A (en) | 2017-01-03 | 2017-01-03 | Backlight source, display substrate and display apparatus |
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| CN107121842A (en) * | 2017-06-22 | 2017-09-01 | 深圳Tcl新技术有限公司 | Backlight module and display device |
| CN107330400A (en) * | 2017-06-29 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of vein device for identifying |
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| CN110703484A (en) * | 2019-09-03 | 2020-01-17 | 深圳市华星光电技术有限公司 | Quantum dot display |
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| WO2021042539A1 (en) * | 2019-09-03 | 2021-03-11 | Tcl华星光电技术有限公司 | Quantum dot display |
| CN114023899A (en) * | 2021-10-25 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN114488619A (en) * | 2022-02-28 | 2022-05-13 | 京东方科技集团股份有限公司 | Display module and display device |
| WO2023160643A1 (en) * | 2022-02-28 | 2023-08-31 | 京东方科技集团股份有限公司 | Display module and display device |
| CN114488619B (en) * | 2022-02-28 | 2023-10-27 | 京东方科技集团股份有限公司 | Display module and display device |
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Application publication date: 20170426 |