CN115061311A - Backlight module, manufacturing method thereof and display terminal - Google Patents
Backlight module, manufacturing method thereof and display terminal Download PDFInfo
- Publication number
- CN115061311A CN115061311A CN202210701708.4A CN202210701708A CN115061311A CN 115061311 A CN115061311 A CN 115061311A CN 202210701708 A CN202210701708 A CN 202210701708A CN 115061311 A CN115061311 A CN 115061311A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light guide
- quantum dot
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000002096 quantum dot Substances 0.000 claims abstract description 129
- 239000012788 optical film Substances 0.000 claims abstract description 18
- 238000009792 diffusion process Methods 0.000 claims description 32
- 238000004806 packaging method and process Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 238000001579 optical reflectometry Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 18
- 235000009537 plain noodles Nutrition 0.000 abstract 1
- 239000000463 material Substances 0.000 description 32
- 239000010408 film Substances 0.000 description 27
- 238000005516 engineering process Methods 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000007641 inkjet printing Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000011787 zinc oxide Substances 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
-
- 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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- 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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides a backlight module, a manufacturing method thereof and a display terminal; the backlight module comprises a light source, a light guide plate arranged on the light emitting side of the light source, a quantum dot array arranged on the light emitting side of the light guide plate and an optical film layer group arranged on one side, away from the light guide plate, of the quantum dot array, wherein the quantum dot array comprises a plurality of quantum dots arranged in an array manner, a plurality of first grooves arranged in an array manner are formed in the light emitting surface of the light guide plate, and the plurality of quantum dots of the quantum dot array are arranged in the plurality of first grooves; this application sets up the quantum dot array through the light-emitting side at the light guide plate, utilizes the quantum dot to promote the colour gamut performance, makes the color more vivid, moreover because the quantum dot sets up in the first recess on the light guide plate goes out the plain noodles, makes the quantum dot constitute microstructure in first recess, can effectively promote the light energy utilization of quantum dot and rate, and then improves display effect.
Description
Technical Field
The application relates to the field of display technologies, in particular to a backlight module, a manufacturing method of the backlight module and a display terminal.
Background
The quantum dot display technology is similar to the LED display technology, and the difference between the two technologies is that the quantum dot display technology uses a quantum dot thin film in a backlight source. Quantum Dots (QD) are a nano material which can not be seen by naked eyes, a Quantum dot light source can emit full-spectrum light through irradiation of a blue LED, and through fine adjustment of backlight, color gamut expression can be greatly improved, so that the color is more vivid, and excellent display performance is achieved. Among them, the light energy utilization rate of the quantum dot light source is one of the key factors determining the display effect of the quantum dot.
In the current quantum dot display technology, most of the quantum dot films directly cover the light-emitting surface of the LED light source, and although the quantum dot films are relatively simple to manufacture, the light energy utilization rate of the quantum dot backlight source is not high for the whole backlight module, which greatly affects the display effect.
Disclosure of Invention
The application provides a backlight module, a manufacturing method thereof and a display terminal, which aim to solve the technical problem that the light energy utilization rate of a quantum dot backlight source in the current quantum dot display technology is not high.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
the application provides a backlight unit, includes:
a light source;
the light guide plate is arranged on the light emitting side of the light source;
the quantum dot array is arranged on the light emitting side of the light guide plate and comprises a plurality of quantum dots arranged in an array; and
the optical film layer group is arranged on one side, away from the light guide plate, of the quantum dot array;
the light guide plate is characterized in that a plurality of first grooves which are arranged in an array mode are formed in the light emergent surface of the light guide plate, and the quantum dots of the quantum dot array are arranged in the first grooves.
In the backlight module, the optical film layer group comprises a light diffusion plate arranged on one side of the quantum dot array, which is far away from the light guide plate;
the surface of one side of the light diffusion plate, which is close to the light guide plate, is provided with a plurality of second grooves which are arranged in an array mode.
In the backlight module of the application, in the light-emitting direction of the light guide plate, the second groove is in orthographic projection on the light guide plate is located in the first groove.
In the backlight module of this application, each first recess corresponds there is a plurality of the second recess on the light-emitting direction of light guide plate, it is a plurality of the second recess is in orthographic projection on the light guide plate is located the correspondence in the first recess.
In the backlight module of the application, the backlight module further comprises a packaging frame arranged on one side of the light guide plate, which is far away from the quantum dot array;
and the surface of one side, close to the light guide plate, of the packaging frame is provided with a plurality of third grooves which are arranged in an array manner.
In the backlight module of the present application, in the light emitting direction of the light guide plate, the third groove is in orthographic projection on the light guide plate is located in the first groove.
In the backlight module of the application, a light reflection surface or a light reflection layer is arranged on the surface of one side, close to the light guide plate, of the packaging frame, and the light reflectivity of the light reflection layer is larger than that of the packaging frame.
In the backlight module, a blue light attenuation layer is arranged between the quantum dot array and the light diffusion plate, and the blue light attenuation layer comprises nano-doped particles.
The application also provides a manufacturing method of the backlight module, which comprises the following steps:
providing a light guide plate, a light source and an optical film layer group;
forming a plurality of first grooves arranged in an array on the first surface of the light guide plate;
forming a quantum dot array comprising a plurality of quantum dots in the first grooves;
and arranging the optical film layer group on the first surface of the light guide plate, arranging the light source on the side surface of the light guide plate, and packaging to form the backlight module.
Advantageous effects
The quantum dot array is arranged on the light emitting side of the light guide plate, the color gamut expression is improved by using the quantum dots, so that the color is more vivid, and the quantum dots are arranged in the first grooves on the light emitting surface of the light guide plate, so that the quantum dots form a microstructure in the first grooves, the light energy utilization rate of the quantum dots can be effectively improved, and the display effect is improved; in addition, the quantum dot film arranged on the light source in the whole surface in the traditional quantum dot display technology is changed into the quantum dot array in the lattice form, so that the using amount of quantum dot materials can be effectively reduced, and the cost of the quantum dot display technology can be effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of an overall structure of a backlight module according to the present application;
FIG. 2 is a block diagram of a process of fabricating a backlight module according to the present application;
fig. 3 to 9 are schematic flow charts illustrating a method for manufacturing a backlight module according to the present application.
Description of reference numerals:
100. a light source; 110. a printed wiring board; 120. an LED chip;
200. a light guide plate; 210. a first groove; 220. caulking grooves;
300. a quantum dot array; 310. quantum dots;
400. a set of optical film layers; 410. a light-diffusing sheet; 411. a second groove; 420. a diffusion membrane; 430. a brightness enhancement film;
500. a package frame; 510. a third groove; 520. a light reflecting surface; 530. a light reflecting layer;
600. a blue light attenuating layer; 610. a blue light attenuation portion.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In the current quantum dot display technology, most of the quantum dot films directly cover the light-emitting surface of the LED light source, and although the quantum dot films are relatively simple to manufacture, the light energy utilization rate of the quantum dot backlight source is not high for the whole backlight module, which greatly affects the display effect. The present application proposes the following solutions based on the above technical problems.
Referring to fig. 1, the present application provides a backlight module, which includes a light source, a light guide plate disposed on a light exit side of the light source, a quantum dot array disposed on the light exit side of the light guide plate, and an optical film layer group disposed on a side of the quantum dot array away from the light guide plate. The quantum dot array comprises a plurality of quantum dots arranged in an array, a plurality of first grooves arranged in an array are formed in the light emergent surface of the light guide plate, and the quantum dots in the quantum dot array are arranged in the first grooves.
The quantum dot array is arranged on the light emitting side of the light guide plate, and the color gamut expression is improved by using the quantum dots, so that the color is more vivid; the quantum dots are arranged in the first groove on the light-emitting surface of the light guide plate, so that the quantum dots form a micro structure in the first groove, the light energy utilization rate of the quantum dots can be effectively improved, and the display effect is further improved; in addition, the quantum dot film arranged on the light source in the whole surface in the traditional quantum dot display technology is changed into the quantum dot array in the lattice form, so that the using amount of quantum dot materials can be effectively reduced, and the cost of the quantum dot display technology can be effectively reduced.
The technical solution of the present application will now be described with reference to specific embodiments. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
In this embodiment, the light source may be an LED light bar, and the LED light bar may be composed of a Printed Circuit Board (PCB) and a plurality of LED chips electrically connected to the PCB. The LED chip can be a blue LED, so that blue light is emitted and is incident on the quantum dots through the light guide plate, and the quantum dots are excited to emit full-spectrum light.
In this embodiment, the light source may be disposed on a side surface of the light guide plate, that is, the backlight module may be a side-in type backlight module. The side surface of the light guide plate may be understood as a side surface parallel to a light emitting direction of the light guide plate. The light source may be disposed on at least one side surface of the light guide plate, and particularly, the light source may be disposed only on one side of the light guide plate, or the light source may be disposed on opposite sides of the light guide plate.
In this embodiment, in order to reduce the light leakage phenomenon of the light source at the side surface of the light guide plate, an embedding groove may be disposed on the side surface of the light guide plate, so that the LED chip of the light source is embedded into the light guide plate, thereby reducing the light loss.
In this embodiment, the first groove may be a cylindrical or hemispherical groove, and the quantum dot material may be filled in the cylindrical or hemispherical first groove to form a cylindrical or hemispherical quantum dot. On one hand, the first groove can keep the shape and the structure of the quantum dot stable, so that the quantum dot can continuously and stably emit light, and on the other hand, the cylindrical or hemispherical quantum dot has a larger light-emitting area, so that the light energy utilization rate of the quantum dot can be improved, and the display effect can be better improved.
In this embodiment, the material of the quantum dot may be a nano material such as InP, GaAs, CdSe, ZnS, CdS, CdSe — SiO2, or perovskite.
Referring to fig. 1, in the backlight module of the present application, the optical film layer set may include a light diffusion plate disposed on a side of the quantum dot array away from the light guide plate, a diffusion film disposed on a side of the light diffusion plate away from the light guide plate, and a brightness enhancement film disposed on a side of the diffusion film away from the light diffusion plate. The light-diffusing plate can enable light rays to be continuously refracted, reflected and scattered between chemical particles and resin in the light-diffusing plate, scientifically adjust the light propagation direction, and accordingly has high light transmittance and good light diffusion effect. The diffusion film can diffuse the light emitted from the light diffusion plate, so that the emitted light is uniformly distributed, and the atomization effect is realized. The brightness enhancement film can effectively improve the illumination brightness, uniformity and image contrast of the backlight module, and indirectly improve the power consumption performance of the backlight module.
In this embodiment, the material of the light diffusion plate may be polymethyl methacrylate (PMMA), Polycarbonate (PC), etc., the diffusion film may be polyethylene terephthalate (PET) as a base material, an optical film layer doped with diffusion particles therein, and the brightness enhancement film may be a general prism sheet, a multifunctional prism sheet, a thin film microlens, a reflective polarizer, etc.
Referring to fig. 1, in the backlight module of the present application, a plurality of second grooves arranged in an array may be disposed on a surface of the light diffusion plate near one side of the light guide plate. The light emitted from the quantum dot array is reflected and refracted at multiple angles at the second grooves, so that the light can be further diffused in the light diffusion plate, the light can enter the diffusion film more uniformly, and the atomization effect is further improved.
In this embodiment, the second groove may be a hemispherical micro groove, and an opening of the second groove faces the quantum dot array. Emergent light of the quantum dot array irradiates the surface of the second groove and is refracted into the light diffusion plate through the surface of the second groove. The second grooves are of micro groove structures, so that the divergence degree of emergent light of the quantum dot array is larger, and the light enters the diffusion film more uniformly.
In this embodiment, in the light exit direction of the light guide plate, the orthographic projection of the second groove on the light guide plate may be located in the first groove, so that the emitted light of the quantum dot may be more sufficiently irradiated into the first groove, which is beneficial to further improving the light energy utilization rate of the quantum dot array.
In this embodiment, each of the first grooves may correspond to a plurality of the second grooves, and in the light emitting direction of the light guide plate, orthographic projections of the plurality of the second grooves on the light guide plate may be located in the corresponding first grooves. In other words, in a top view direction of the backlight module, a planar size of the second groove is smaller than a planar size of the first groove, and the plurality of second grooves corresponding to each first groove may form a micro groove group, and the plurality of micro groove groups corresponding to the plurality of first grooves are arranged in an array on the light-diffusing plate.
This embodiment can make through above setting the second recess can constitute miniature groove structure, and a large amount of miniature groove structure help promoting the effect of dispersing of diffusion sheet to light, and then improve the display effect.
Referring to fig. 1, in the backlight module of the present application, the backlight module may further include a package frame disposed on a side of the light guide plate away from the quantum dot array, and the package frame is attached to a side of the light guide plate away from the quantum dot array. The packaging frame can be a planar plate with a rectangular structure, and is used for supporting and protecting the light guide plate on the backlight side of the light guide plate.
In this embodiment, the material of the package frame may be aluminum material or plastic, and the plastic material may be polymethyl methacrylate (PMMA), Polycarbonate (PC), or other materials.
In this embodiment, a plurality of third grooves arranged in an array may be disposed on a surface of the package frame on a side close to the light guide plate, the surface of the third groove may be a hemispherical arc-shaped smooth groove surface, and an opening of the third groove faces the light guide plate, so that light guided out from the light guide plate is collected and reflected back into the light guide plate, thereby improving light energy utilization of the light source.
In this embodiment, in the light-emitting direction of the light guide plate, the depth of the third groove is not more than the thickness of the package frame, so that the structural strength of the package frame itself is sufficient to support and protect the light guide plate, and the structural stability of the whole is improved.
In this embodiment, in the light emitting direction of the light guide plate, the orthographic projection of the third groove on the light guide plate may be located in the first groove, so that the third groove is directly opposite to the first groove, and light reflected by the third groove may be collected onto the quantum dots on the light guide plate, so that the quantum dots emit light more efficiently, and the light energy utilization rate of the light source is effectively improved.
Referring to fig. 1, in the backlight module of the present application, a light reflection surface or a light reflection layer may be disposed on a surface of the package frame near one side of the light guide plate, and a light reflectivity of the light reflection layer is greater than a light reflectivity of the package frame. The light reflection surface or the light reflection layer can improve the light reflection capability of the packaging frame, and further improve the light energy utilization rate of the light source.
In this embodiment, when the material of the package frame is an aluminum material, the light reflecting surface may be a surface of the package frame close to the light guide plate, and the surface may be polished to form a smooth mirror surface with a better mirror reflection effect. When the package frame is made of a plastic material, the light reflection layer is arranged on the surface of the package frame close to one side of the light guide plate, and the light reflection layer can be a metal film layer with high reflectivity, such as an aluminum material.
In this embodiment, both the light reflecting surface and the light reflecting layer cover the surface of the third groove to further enhance the light reflecting capability of the third groove, so as to collect more light onto the quantum dots.
Referring to fig. 1, in the backlight module of the present application, a blue light attenuation layer is disposed between the quantum dot array and the light-diffusing plate, and the blue light attenuation layer includes nano-doped particles. The blue light attenuation layer can reduce blue light emergence to a certain extent, so that the blue light harm is reduced.
In this embodiment, the host material of the blue light attenuation layer may be a resin material such as epoxy resin, polyacrylic resin, or the like, and the nano-doped particles are dispersed in the host material. The nano-doped particles may be a mixed material of cerium oxide and zinc oxide, or the like. The ion diameter of the nano-sized dopant particles may be about 10 nm or so.
In this embodiment, the blue light attenuation layer may include a plurality of blue light attenuation portions distributed in an array, the plurality of blue light attenuation portions may correspond to a plurality of quantum dots in the quantum dot array one to one, and the blue light attenuation portions may also be disposed in the first groove. At the moment, the quantum dot and the blue light attenuation part can be formed in the first groove in an ink-jet printing mode, on one hand, the blue light attenuation part and the quantum dot can be accurately aligned, the blue light prevention effect is improved, on the other hand, materials of quantum dot materials and blue light attenuation layers can be saved, and the production cost is reduced.
In this embodiment, the blue light attenuation layer can be arranged on the light emitting surface of the light guide plate through the whole coating and other modes, at the moment, the blue light attenuation layer can cover the quantum dot array in a whole layer, the forming process is simple, and the effect of reducing blue light harm more fully can be achieved.
The quantum dot array is arranged on the light emitting side of the light guide plate, the color gamut is improved by the quantum dots, the color is more vivid, the quantum dots are arranged in the first grooves in the light emitting surface of the light guide plate to form the micro structure, the light energy utilization rate of the quantum dots can be effectively improved, and the display effect is improved. In addition, the quantum dot film arranged on the light source in the whole surface in the traditional quantum dot display technology is changed into the quantum dot array in the lattice form, so that the using amount of quantum dot materials can be effectively reduced, and the cost of the quantum dot display technology can be effectively reduced.
Referring to fig. 2 to 7, an embodiment of the present application further provides a method for manufacturing a backlight module, which is used for manufacturing the backlight module according to the foregoing embodiment.
Referring to fig. 2, the method for manufacturing the backlight module includes:
s100, providing a light guide plate, a light source and an optical film layer group;
s200, forming a plurality of first grooves which are arranged in an array mode on the first surface of the light guide plate;
s300, forming a quantum dot array comprising a plurality of quantum dots in the first grooves;
s400, arranging the optical film layer group on the first surface of the light guide plate, arranging the light source on the side surface of the light guide plate, and packaging to form the backlight module.
In the embodiment, the plurality of first grooves are formed in the light guide plate, and the plurality of quantum dots are formed in the first grooves, so that the quantum dot array with uniform distribution is formed conveniently, the quantum dot microstructure with high luminous efficiency can be formed, the use of quantum dot materials is reduced, and the production cost is reduced.
In this embodiment, the light source in the step S100 may be an LED light bar, and the optical film layer set may include a light-diffusing plate, a diffusion film and a brightness enhancement film, which are stacked.
In this embodiment, the step S100 may include:
s110, providing a light guide plate substrate, a light source and an optical film layer group comprising a light diffusion plate, a diffusion film and a brightness enhancement film.
In this embodiment, the surface of the light diffusion plate is provided with a plurality of second grooves arranged in an array, and the second grooves may be integrally formed when the light diffusion plate is formed by compression molding.
Referring to fig. 3 and 4, in the present embodiment, the step S200 may include:
s210, drilling a plurality of cylindrical or hemispherical first grooves which are arranged in an array mode on the first surface of the light guide plate base material by using a drill to form the light guide plate.
In this embodiment, the first groove may also be integrally formed when the light guide plate substrate is injection molded.
S220, drilling an embedded groove in at least one side face of the light guide plate by using a drill, wherein the embedded groove is arranged along the extending direction of the side face where the embedded groove is located, and the extending length of the embedded groove is not less than that of the LED light bar.
Referring to fig. 5 and fig. 6, in the present embodiment, the step S300 may include:
s310, uniformly dropping the quantum dot material into each first groove in an ink-jet printing mode.
S320, heating the quantum dot array at the temperature of 60-80 ℃ to solidify the quantum dot material in the first groove to form the quantum dot array.
S330, continuously printing the blue light attenuation material on the quantum dots in the first groove in an ink-jet printing mode.
S340, heating the blue light attenuation material at the temperature of about 70 ℃ to solidify the blue light attenuation material so as to form a blue light attenuation layer.
In this embodiment, the quantum dot array and the blue light attenuation layer are formed in the first groove through the above steps, so that the blue light attenuation layer can be aligned with the quantum dot array accurately, the blue light prevention effect is improved, and the manufacturing efficiency of the quantum dot array and the blue light attenuation layer can be effectively improved.
Referring to fig. 7 to 9, in the present embodiment, the step S400 may include:
s410, attaching the light diffusion plate to the blue light attenuation layer, attaching the diffusion film to a side of the light diffusion plate away from the blue light attenuation layer, and attaching the brightness enhancement film to a side of the diffusion film away from the light diffusion plate, so as to implement the arrangement of the optical film layer group on the first surface of the light guide plate, as shown in fig. 7.
In this embodiment, the first surface of the light guide plate is a light exit surface of the light guide plate when the backlight module operates.
S420, disposing the light source in the embedding groove on the side surface of the light guide plate to realize the assembly of the light source and the light guide plate, as shown in fig. 8.
And S430, providing a packaging frame, and forming a plurality of third grooves which are arranged in an array on the surface of the packaging frame.
In this embodiment, the package frame may be a planar plate with a rectangular structure, and when the package frame is made of an aluminum material, the third groove may be integrally formed when the package frame is cast. When the material of the packaging frame is plastic, the third groove can be integrally formed when the packaging frame is subjected to injection molding.
S440, forming a light reflecting surface or a light reflecting layer on the surface of the package frame where the third groove is formed, as shown in fig. 9.
In this embodiment, when the material of the package frame is an aluminum material, the light reflecting surface may be directly a surface of the package frame on which the third groove is disposed. When the packaging frame is made of plastic, the light reflecting layer is required to be arranged on the surface of the packaging frame where the third groove is formed, and the light reflecting layer can be a high-reflectivity metal film layer, such as an aluminum reflecting film.
S450, attaching the surface of the packaging frame, where the third groove is formed, to the surface of the light guide plate, which is far away from the quantum dot array, so as to package and form the backlight module.
In the embodiment, the assembly and the encapsulation of each part of the backlight module are realized through the steps, so that the backlight module has higher light energy utilization rate, the light leakage phenomenon can be effectively reduced, and the assembly structure is stable.
The embodiment of the application further provides a display terminal, the display terminal can include a liquid crystal display panel and the backlight module of the above embodiment, the backlight module is arranged on one side of the liquid crystal display panel, emergent light of the backlight module passes through the rear of the liquid crystal display panel, the liquid crystal display panel is far away from one side of the backlight module is displayed into a picture.
The backlight module, the manufacturing method thereof and the display terminal provided by the embodiment of the application are described in detail, a specific example is applied to explain the principle and the implementation of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A backlight module, comprising:
a light source;
the light guide plate is arranged on the light emitting side of the light source;
the quantum dot array is arranged on the light emitting side of the light guide plate and comprises a plurality of quantum dots arranged in an array; and
the optical film layer group is arranged on one side, away from the light guide plate, of the quantum dot array;
the light guide plate is characterized in that a plurality of first grooves which are arranged in an array mode are formed in the light emergent surface of the light guide plate, and the quantum dots of the quantum dot array are arranged in the first grooves.
2. The backlight module as claimed in claim 1, wherein the optical film layer set comprises a light-diffusing plate disposed on a side of the quantum dot array away from the light guide plate;
the surface of one side of the light diffusion plate, which is close to the light guide plate, is provided with a plurality of second grooves which are arranged in an array mode.
3. The backlight module according to claim 2, wherein an orthographic projection of the second groove on the light guide plate is located in the first groove in a light emitting direction of the light guide plate.
4. The backlight module according to claim 3, wherein each of the first grooves corresponds to a plurality of the second grooves, and an orthogonal projection of the second grooves on the light guide plate is located in the corresponding first groove in the light emitting direction of the light guide plate.
5. The backlight module according to claim 1, further comprising a package frame disposed on a side of the light guide plate away from the quantum dot array;
and the surface of one side, close to the light guide plate, of the packaging frame is provided with a plurality of third grooves which are arranged in an array manner.
6. The backlight module according to claim 5, wherein an orthographic projection of the third groove on the light guide plate in a light emergent direction of the light guide plate is located in the first groove.
7. The backlight module according to claim 5, wherein a light reflecting surface or a light reflecting layer is disposed on a surface of the package frame adjacent to the light guide plate, and a light reflectivity of the light reflecting layer is greater than a light reflectivity of the package frame.
8. The backlight module as claimed in claim 2, wherein a blue light attenuation layer is disposed between the quantum dot array and the light-diffusing plate, and the blue light attenuation layer comprises nano-doped particles.
9. A method for manufacturing a backlight module is characterized by comprising the following steps:
providing a light guide plate, a light source and an optical film layer group;
forming a plurality of first grooves arranged in an array on the first surface of the light guide plate;
forming a quantum dot array comprising a plurality of quantum dots in the first grooves;
and arranging the optical film layer group on the first surface of the light guide plate, arranging the light source on the side surface of the light guide plate, and packaging to form the backlight module.
10. A display terminal, comprising a liquid crystal display panel and the backlight module according to any one of claims 1 to 8, wherein the backlight module is disposed on one side of the liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701708.4A CN115061311B (en) | 2022-06-20 | 2022-06-20 | Backlight module, manufacturing method thereof and display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701708.4A CN115061311B (en) | 2022-06-20 | 2022-06-20 | Backlight module, manufacturing method thereof and display terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115061311A true CN115061311A (en) | 2022-09-16 |
| CN115061311B CN115061311B (en) | 2023-06-02 |
Family
ID=83202497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210701708.4A Active CN115061311B (en) | 2022-06-20 | 2022-06-20 | Backlight module, manufacturing method thereof and display terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115061311B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629498A (en) * | 2022-10-18 | 2023-01-20 | 武汉华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007241272A (en) * | 2006-03-06 | 2007-09-20 | Exploit Technology Co Ltd | Light diffusion film |
| US20110176328A1 (en) * | 2008-07-28 | 2011-07-21 | Munisamy Anandan | UV LED Based color pixel backlight incorporating quantum dots for increasing color gamut of LCD |
| CN104344328A (en) * | 2014-10-22 | 2015-02-11 | 汕头超声显示器（二厂）有限公司 | Backlight module used for high-color-gamut liquid crystal display and manufacturing method thereof |
| CN204201672U (en) * | 2014-11-18 | 2015-03-11 | 上海祥羚光电科技发展有限公司 | A kind of backlight with secondary light conversion |
| CN105158972A (en) * | 2015-09-10 | 2015-12-16 | 深圳市华星光电技术有限公司 | Light guide plate and preparing method of same |
| CN107577084A (en) * | 2017-09-29 | 2018-01-12 | 京东方科技集团股份有限公司 | Back light apparatus and preparation method thereof |
| CN114114752A (en) * | 2021-12-01 | 2022-03-01 | 厦门天马微电子有限公司 | Backlight module and display device |
-
2022
- 2022-06-20 CN CN202210701708.4A patent/CN115061311B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007241272A (en) * | 2006-03-06 | 2007-09-20 | Exploit Technology Co Ltd | Light diffusion film |
| US20110176328A1 (en) * | 2008-07-28 | 2011-07-21 | Munisamy Anandan | UV LED Based color pixel backlight incorporating quantum dots for increasing color gamut of LCD |
| CN104344328A (en) * | 2014-10-22 | 2015-02-11 | 汕头超声显示器（二厂）有限公司 | Backlight module used for high-color-gamut liquid crystal display and manufacturing method thereof |
| CN204201672U (en) * | 2014-11-18 | 2015-03-11 | 上海祥羚光电科技发展有限公司 | A kind of backlight with secondary light conversion |
| CN105158972A (en) * | 2015-09-10 | 2015-12-16 | 深圳市华星光电技术有限公司 | Light guide plate and preparing method of same |
| CN107577084A (en) * | 2017-09-29 | 2018-01-12 | 京东方科技集团股份有限公司 | Back light apparatus and preparation method thereof |
| CN114114752A (en) * | 2021-12-01 | 2022-03-01 | 厦门天马微电子有限公司 | Backlight module and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629498A (en) * | 2022-10-18 | 2023-01-20 | 武汉华星光电技术有限公司 | Backlight module, manufacturing method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115061311B (en) | 2023-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7579198B2 (en) | Method for making backlight module | |
| JP5360172B2 (en) | Planar light source device and display device using the same | |
| US7422357B1 (en) | Optical plate and backlight module using the same | |
| US7663804B2 (en) | Optical plate and backlight module using the same | |
| KR101751711B1 (en) | Light guides | |
| TWI502230B (en) | Light guide element | |
| US7740388B2 (en) | Optical plate and backlight module using the same | |
| US20090016067A1 (en) | Optical plate and backlight module using the same | |
| EP3872873A1 (en) | Light-emitting module | |
| KR20140116652A (en) | Back light unit and display device including the same | |
| CN210244014U (en) | Backlight module, display screen and mobile terminal | |
| KR20150025651A (en) | Quantum Dot film and display device including Quantum Dot film | |
| KR20110135097A (en) | LCD Display Module | |
| TW202028822A (en) | Light source module and display appartus | |
| US10782469B2 (en) | Light guide plate and its fabricating method, as well as backlight module | |
| CN115061311B (en) | Backlight module, manufacturing method thereof and display terminal | |
| CN114265141B (en) | Light guide plate, backlight module and display device | |
| KR20010051854A (en) | Light pipe, planar light source unit and liquid-crystal display device | |
| CN114089561A (en) | Display device | |
| KR102353715B1 (en) | Quantom dot film and liquid crystal display device with the same | |
| CN108873126B (en) | Optical film, backlight module and display device | |
| US20190064595A1 (en) | Display system | |
| TWI345662B (en) | Backlight module and method for manufacturing the same | |
| JP2001202812A (en) | Luminous apparatus and its manufacturing method and display apparatus using the same | |
| CN114217479A (en) | Optical assembly, backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |