CN114002883A - Quantum dot light guide plate and backlight display module - Google Patents
Quantum dot light guide plate and backlight display module Download PDFInfo
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- CN114002883A CN114002883A CN202111423472.4A CN202111423472A CN114002883A CN 114002883 A CN114002883 A CN 114002883A CN 202111423472 A CN202111423472 A CN 202111423472A CN 114002883 A CN114002883 A CN 114002883A
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- Prior art keywords
- guide plate
- light guide
- quantum dot
- light
- display module
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 23
- 239000001301 oxygen Substances 0.000 claims description 23
- 239000011241 protective layer Substances 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 10
- 239000012788 optical film Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004054 semiconductor nanocrystal Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to the field of liquid crystal display, in particular to a quantum dot light guide plate and a backlight display module, wherein the quantum dot light guide plate comprises: the back of the light guide plate is provided with a plurality of mesh points which are pits, quantum dot materials are coated on the surface of the light guide plate, and the quantum dots enter the mesh points, so that light rays which are incident to the light guide plate and are totally reflected are diffusely emitted when passing through the mesh points, and are simultaneously excited to form white light, and then the light rays are uniformly emitted from the front of the light guide plate. Set up the site of pit on the light guide plate, make the quantum dot enter into the site, when making light evenly from the positive even outgoing of light guide plate, avoided in the past that quantum dot tube structure design is complicated, the breakable problem of glass quantum dot pipe to reduction in production cost.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a quantum dot light guide plate and a backlight display module.
Background
The quantum dots of the semiconductor nanocrystal can excite light with specific frequency under the action of electricity or light, and are widely applied to the display industry due to the unique optical performance advantages of single and pure luminescent color, adjustable spectrum, high luminescent efficiency, stable luminescence, wide color gamut and the like. At present, there are three main application modes of quantum dots: firstly, two layers of barrier films are adopted to encapsulate the quantum dot material in the middle to form the quantum dot film. The scheme has the advantages of more complex process, more used quantum dot materials and high cost; and secondly, encapsulating the quantum dot material in a glass tube to form the quantum dot tube. The glass quantum dots are fragile in tube volume and high in cost; and thirdly, preparing the quantum dot material into fluorescent powder, and coating the fluorescent powder on the surface of the LED. The scheme influences the service life of the quantum dots due to the fact that the surface temperature of the LED is high and the quantum dots are unstable.
Therefore, the prior art has the defects and needs to be further developed.
Disclosure of Invention
The embodiment of the invention provides a quantum dot light guide plate and a backlight display module, and by coating quantum dots in the mesh points of the light guide plate, the problems of complex process, high cost, instability and the like of the conventional scheme are solved.
According to an embodiment of the present invention, there is provided a quantum dot light guide plate including: the light guide plate, be provided with the site that a plurality of is the pit on the back of light guide plate, be provided with quantum dot material in the site, quantum dot material is used for making the light that passes through the light guide plate, takes place the diffuse emission when passing the site, is aroused simultaneously and forms white light.
Furthermore, the mesh points on the light guide plate are distributed in an array.
Furthermore, the mesh points of the pits are generated on the back surface of the light guide plate, and the depth of the mesh points is 100-150 um.
Further, the aperture of the mesh is larger than 200 um.
Further, the thickness of the light guide plate is 2mm-3 mm.
Further, the quantum dot material is a semiconductor nanocrystal material.
Further, the particle diameter of the quantum dot material is 1-10 nm.
Furthermore, the dots comprise quantum dots with different particle sizes.
A quantum dot backlight display module comprises: the quantum dot light guide plate, the water oxygen protective layer, the optical film and the liquid crystal panel are sequentially stacked from bottom to top, and the water oxygen protective layer is attached to one surface, provided with the mesh points, of the light guide plate.
Further, the thickness of the water oxygen protective layer is 110um-120 um.
Furthermore, the display module assembly still wraps the reflecting layer, and the reflecting layer laminating is on the water oxygen protective layer, and the reflecting layer is used for reflecting light to from the positive outgoing of light guide plate.
Furthermore, the quantum dot backlight display module also comprises an LED light source, and the LED light source irradiates from the side surface of the light guide plate.
The quantum dot light guide plate in the embodiment of the invention comprises: the back of the light guide plate is provided with a plurality of mesh points which are pits, quantum dot materials are coated on the surface of the light guide plate on which the mesh points are arranged, and the quantum dots enter the mesh points, so that light passing through the back of the light guide plate is diffused when passing through the mesh points and is excited to form white light, and then the light is uniformly emitted from the front of the light guide plate. Set up the site of pit on the light guide plate, make the quantum dot enter into the site, when making light evenly from the positive even outgoing of light guide plate, avoided in the past that quantum dot tube structure design is complicated, the breakable problem of glass quantum dot pipe to reduction in production cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a quantum dot light guide plate according to the present invention;
FIG. 2 is a schematic view of the distribution of the dots of the light guide plate according to the present invention;
FIG. 3 is a schematic view of a dot structure of a light guide plate according to the present invention;
FIG. 4 is a schematic structural diagram of a backlight display module according to the present invention.
Reference numerals: the LED light source comprises a reflector 1, a water oxygen protective layer 2, a light guide plate 3, an optical film 4, a liquid crystal panel 5, an LED light source 6, a dot 7 and a quantum dot material 8.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
At present, a common method for disposing quantum dots on a liquid crystal panel includes:
1. the quantum dot material is packaged in the glass tube to form the quantum dot tube, but the quantum dot tube has a complex structure design, and the glass quantum dot tube is easy to break, so that the cost is higher. 2. Encapsulating the quantum dot material in the middle by adopting two layers of barrier films to form a quantum dot film; however, the process of the quantum dot film is complex, more quantum dot materials are needed, and the cost is high. 3. Preparing the quantum dots into fluorescent powder, and coating the fluorescent powder on the surface of the LED; the LED surface temperature is high, the quantum dots are unstable, and the service life of the quantum dots is influenced.
Referring to fig. 1, to solve the above technical drawbacks, the present invention provides a quantum dot light guide plate, including: the light guide plate 3 is provided with a plurality of mesh points 7 that are the pit on the back of light guide plate 3, is provided with the face coating quantum dot 8 material of mesh point 7 at light guide plate 3, and in quantum dot material 8 entered into mesh point 7, make the light through the light guide plate 3 back, take place the diffuse emission when passing through mesh point 7, arouse simultaneously and form white light, and then light is openly evenly emergent from light guide plate 3. Set up the site 7 of pit on light guide plate 3, make quantum dot 8 enter into in the site 7, when making light evenly from the positive even outgoing of light guide plate 3, avoided 8 tubular construction designs of quantum dot in the past complicacy, the breakable problem of glass quantum dot 8 pipe to reduction in production cost.
Referring to fig. 2, which is a schematic view of a mesh 7 of a light guide plate 3, a plurality of mesh 7 are laser-emitted on the back of the light guide plate 3; preferably, the dots 7 on the light guide plate 3 are distributed in a square array; in addition, the dots 7 may be distributed in a circular array.
Referring to fig. 1 and fig. 3, which are schematic diagrams of pits of a laser dot 7, the dot 7 of the pit is generated on the back of the light guide plate 3 by a laser processing method, and the depth of the dot is set to 100-; the size of the mesh point 7 is more than 200 um.
Further, the thickness of the light guide plate is 2mm-3 mm.
The quantum dot material is a semiconductor nanocrystal with the particle size of 1-10nm, the quantum dot material is formed into granular quantum dots 8, the mesh points 7 comprise the quantum dots 8 with different particle sizes, and the different particle sizes can excite light with specific frequency under the action of electricity or light.
Referring to fig. 1 and 4, a quantum dot backlight display module includes: the quantum dot light guide plate 3, the water oxygen protective layer 2, the optical film 4 and the liquid crystal panel 5 are sequentially stacked from bottom to top, the quantum dot 8 backlight display module further comprises an LED light source 6, and the LED light source 6 irradiates from the side face of the light guide plate 3; in order to ensure uniform display, the total reflection propagation of light rays on the light guide plate 3 needs to be changed, pit mesh points 7 are formed at the bottom of the light guide plate 3 in a laser processing mode, and light rays form diffuse reflection when encountering the mesh points 7 in the propagation process, so that the light rays are emitted from the front side of the light guide plate 3.
In the quantum dot light guide plate (for example, blue light excites red and green quantum dots 8), a quantum dot 8 material is coated on one surface of a pit of a mesh point 7 of a laser light guide plate 3, and the quantum dot 8 enters the pit of the mesh point 7; in order to protect the quantum dots 8, a water oxygen protective layer 2 is designed to protect the quantum dots 8 after the quantum dots 8 are coated, so that the quantum dots 8 are prevented from being corroded by water oxygen; in order to protect the water oxygen protective layer 2 and improve the reflectivity, a layer of reflector plate 1 is designed to be attached to the water oxygen protective layer 2 to form an integrated quantum dot light guide plate. Exciting light blue light enters the light guide plate 3, is emitted to the screen dots 7 and excites red and green quantum dots 8, total reflection conditions are changed, red light and green light are excited, the red light and the green light are combined into unexcited blue light to form white light, and the quantum dot 8 backlight display module is formed through light correction and shielding performance of the optical film 4. According to the screen spectrum of the Open Cell (liquid crystal panel 5), the required white light is obtained by adjusting the spectrum of the blue light and the proportion of the red and green quantum dots 8.
In the embodiment, the thickness of the water oxygen protective layer is 110um-120 um; the thickness of the water-oxygen protective layer is preferably 100um, and the water-oxygen protective layer can effectively block external water vapor and oxygen and protect the quantum dot material. Meanwhile, light absorption is reduced, and reflectivity is improved.
In the embodiment, a quantum dot 8 material is coated in a mesh point 7 of a laser light guide plate 3, a water-oxygen protective layer 2 is designed to protect the quantum dot 8 on the light guide plate 3, a reflector plate 1 is designed to be attached to the water-oxygen protective layer 2 to form the light guide plate 3 with the quantum dot 8 integrally, and when the light guide plate is excited by blue light or other light, a white light backlight display module is formed, so that the display color gamut is improved.
The invention can save the quantum dot 8 material and effectively reduce the cost by coating the quantum dot 8 material on the mesh points 7 of the light guide plate 3. In addition, design one deck water oxygen protective layer 2 and protect quantum dot 8 on light guide plate 3, design one deck reflector plate 1 and laminate to water oxygen protective layer 2 to form integrative quantum dot 8 light guide plate 3, the setting of water oxygen protective layer 2 and reflector plate 1 guarantees that the quantum dot 8 material is not destroyed, and the technology of this kind of mode is also simpler. The reflective layer 1 is disposed to reflect light so that light is emitted from the front surface of the light guide plate 3.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A quantum dot light guide plate, comprising: the LED light source comprises a light guide plate, wherein a plurality of mesh points which are concave pits are arranged on the light guide plate, quantum dot materials are arranged in the mesh points, and the quantum dot materials are used for enabling light rays passing through the light guide plate to generate diffuse emission when passing through the mesh points and are excited to form white light.
2. The quantum dot light guide plate according to claim 1, wherein the dots on the light guide plate are distributed in an array.
3. The quantum dot light guide plate as claimed in claim 1 or 2, wherein a dot of the pit is formed on the back surface of the light guide plate, and the depth of the dot is 100-150 μm.
4. The quantum dot light guide plate according to claim 3, wherein the aperture of the mesh point is larger than 200 um.
5. The quantum dot light guide plate according to claim 4, wherein the light guide plate has a thickness of 2mm to 3 mm.
6. The quantum dot light guide plate according to claim 5, wherein the quantum dot materials with different particle sizes are included in the mesh points.
7. The utility model provides a quantum dot backlight display module assembly which characterized in that includes: the quantum dot light guide plate, the water oxygen protective layer, the optical film and the liquid crystal panel as claimed in any one of claims 1 to 6, wherein the light guide plate, the optical film and the liquid crystal panel are sequentially stacked from bottom to top, and the water oxygen protective layer is attached to the side of the light guide plate on which the dots are disposed.
8. The quantum dot backlight display module of claim 7, wherein the thickness of the water-oxygen protective layer is 110um to 120 um.
9. The quantum dot backlight display module of claim 8, wherein the display module further comprises a reflective layer, the reflective layer is attached to the water-oxygen protective layer, and the reflective layer is used for reflecting light to exit from the front surface of the light guide plate.
10. The quantum dot backlight display module of claim 8, further comprising an LED light source incident to the quantum dot light guide plate from the light incident side of the light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111423472.4A CN114002883A (en) | 2021-11-26 | 2021-11-26 | Quantum dot light guide plate and backlight display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111423472.4A CN114002883A (en) | 2021-11-26 | 2021-11-26 | Quantum dot light guide plate and backlight display module |
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| Publication Number | Publication Date |
|---|---|
| CN114002883A true CN114002883A (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111423472.4A Pending CN114002883A (en) | 2021-11-26 | 2021-11-26 | Quantum dot light guide plate and backlight display module |
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| CN (1) | CN114002883A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075190A (en) * | 2014-06-25 | 2014-10-01 | 福州大学 | Backlight module based on quantum dot light guide plate |
| CN205404871U (en) * | 2016-02-29 | 2016-07-27 | 厦门市益津鹭科技有限公司 | Grating type light guide plate based on quantum dot |
| CN206270537U (en) * | 2016-12-15 | 2017-06-20 | 厦门市京骏科技有限公司 | A kind of Double-color integrated is molded quantum dot light guide plate |
| CN108398829A (en) * | 2018-02-27 | 2018-08-14 | 惠州市华星光电技术有限公司 | Backlight module and preparation method thereof based on quantum dot |
-
2021
- 2021-11-26 CN CN202111423472.4A patent/CN114002883A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075190A (en) * | 2014-06-25 | 2014-10-01 | 福州大学 | Backlight module based on quantum dot light guide plate |
| CN205404871U (en) * | 2016-02-29 | 2016-07-27 | 厦门市益津鹭科技有限公司 | Grating type light guide plate based on quantum dot |
| CN206270537U (en) * | 2016-12-15 | 2017-06-20 | 厦门市京骏科技有限公司 | A kind of Double-color integrated is molded quantum dot light guide plate |
| CN108398829A (en) * | 2018-02-27 | 2018-08-14 | 惠州市华星光电技术有限公司 | Backlight module and preparation method thereof based on quantum dot |
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