CN116047807A - Mini-LED direct type backlight module with staggered non-uniform arrangement - Google Patents
Mini-LED direct type backlight module with staggered non-uniform arrangement Download PDFInfo
- Publication number
- CN116047807A CN116047807A CN202211381145.1A CN202211381145A CN116047807A CN 116047807 A CN116047807 A CN 116047807A CN 202211381145 A CN202211381145 A CN 202211381145A CN 116047807 A CN116047807 A CN 116047807A
- Authority
- CN
- China
- Prior art keywords
- mini
- light
- guide plate
- led
- light guide
- 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
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000012788 optical film Substances 0.000 claims abstract description 12
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 10
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 10
- 229920005749 polyurethane resin Polymers 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 8
- 239000004417 polycarbonate Substances 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 7
- 229920000515 polycarbonate Polymers 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- NOKUWSXLHXMAOM-UHFFFAOYSA-N hydroxy(phenyl)silicon Chemical compound O[Si]C1=CC=CC=C1 NOKUWSXLHXMAOM-UHFFFAOYSA-N 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- 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
- G02B6/0065—Manufacturing aspects; Material aspects
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a Mini-LED direct type backlight module which is arranged in a staggered and non-uniform manner, comprising a light guide plate, a direct type backlight module, a light reflection microstructure, an angle-in type backlight source, a reflecting cover, a reflecting sheet and an optical film. The light guide plate is provided with a quadrangular pyramid light reflection microstructure and Mini-LED light sources on the lower surface in a staggered and non-uniform manner, the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incidence surface, and the corner light sources are arranged. The staggered non-uniformly arranged Mini-LED direct type backlight module provided by the invention solves the problems of low light mixing efficiency, edge brightness attenuation and poor heat dissipation capability caused by compact Mini-LED distribution in the existing direct type backlight display device.
Description
Technical Field
The invention belongs to the technical field of backlight modules of display devices, and particularly relates to a Mini-LED direct type backlight module which is arranged in a staggered and non-uniform manner.
Background
In recent years, with the development of display technology, flat panel display has been widely used in various fields such as life and military, and backlight module thinning technology and brightness enhancement technology have been attracting attention as key technologies in the liquid crystal display field. Mini-LED backlight is used as a novel backlight, and regional dimming can be realized in a smaller range through densely arranging a large number of Mini-LED chips, so that compared with a traditional backlight module, the Mini-LED backlight can realize better brightness uniformity in a smaller light mixing distance, and further the thickness of the backlight module is greatly reduced, and therefore industry attention is paid.
According to the direct type backlight display device CN112631025A disclosed by the prior art, a layer of optical adhesive layer is attached to a substrate and an LED light source by adopting a traditional LED light source, the LED light source and a reflecting cover are integrally packaged and bonded by utilizing the optical adhesive layer, the LED light source and the reflecting cover are sealed and reinforced under the condition of keeping the uniformity of light emission, and meanwhile, the uniform light distribution is realized through the synergistic effect of the high-reflection structural design of a paraxial region on the reflecting cover and the optical adhesive layer without generating light spots. However, the display device needs a larger light mixing height, which is difficult to meet the demands of people for light and thin products.
According to the direct type Mini-LED backlight display device CN213988067U disclosed by the prior art, a plurality of Mini-LEDs are arranged on a substrate uniformly, point-to-point micro-structure diffusion films are arranged above the Mini-LEDs, gaps are arranged between the Mini-LEDs and the point-to-point micro-structure diffusion films, a layer of brightness enhancement film is arranged on the micro-structure diffusion films, a shading double-sided adhesive layer is arranged on the brightness enhancement film, light is further uniformly dispersed by utilizing a micro structure, and light uniformity is improved through multiple light dispersion and conduction of the diffusion films and the brightness enhancement film. However, the display device needs a large number of Mini-LED light sources, the compact Mini-LEDs are distributed to cause insufficient light mixing of the Mini-LEDs, the phenomenon of dark surrounding is easy to occur, the heat dissipation capacity of the display device is poor, the service life is short, and the long-term use of the display device is difficult to maintain.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a Mini-LED direct type backlight module which is arranged in a staggered and non-uniform manner.
Comprises a light guide plate, a direct type backlight module, a light reflection microstructure, an angle-in type backlight source, a reflecting cover, a reflecting sheet and an optical film. The light guide plate is provided with a quadrangular pyramid light reflection microstructure and Mini-LED light sources on the lower surface in a staggered and non-uniform manner, the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incidence surface, and the corner light sources are arranged. The staggered non-uniformly arranged Mini-LED direct type backlight module provided by the invention solves the problems of low light mixing efficiency, edge brightness attenuation and poor heat dissipation capability caused by compact Mini-LED distribution in the existing direct type backlight display device.
The light emitted by the Mini-LED light source is reflected by the microstructure, so that the light mixing efficiency is improved, and the brightness is enhanced; and performing corner removal treatment on the light guide plate, grinding and polishing four corners to form a plane light incident surface, and placing the corner-incident backlight source at the cross sections of the corner areas of the plane shapes at the four corners of the light guide plate. By calculating the proper light source distance L and the light mixing distance H, the light mixing efficiency of the Mini-LED is improved, the occurrence of bright and dark light spots is prevented, and the full-screen brightness uniformity of the display device is not lower than 85%.
The display device solves the problems of the traditional LED direct type backlight device that the edge brightness is attenuated and the display effect is poor, reduces the use amount of Mini-LED light sources, enhances the heat dissipation capacity of the display device, and prolongs the service life of the display device.
The technical scheme adopted for solving the technical problems is as follows:
a Mini-LED direct type backlight module with staggered and non-uniform arrangement is characterized in that: the backlight module comprises a light guide plate, a direct type backlight module, a light reflection microstructure, an angle-in type backlight source, a reflecting cover, a reflecting sheet and an optical film;
the direct type backlight module is positioned on the lower surface of the light guide plate and consists of a plurality of Mini-LED light sources which are staggered and unevenly arranged, and each Mini-LED is electrically connected with a group of connection terminal pairs;
the light reflection microstructures are positioned on the lower surface of the light guide plate and are staggered and unevenly arranged, and the arrangement structures are staggered with the Mini-LED light sources;
the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incident surface, and an angle light incident backlight source is arranged in a corner plane area;
the reflection covers are positioned at four corner areas of the light guide plate and completely cover the corner-in backlight source;
the reflecting sheet is positioned on the lower surface of the light guide plate and used for reflecting light rays transmitted from the bottom of the light guide plate so as to increase the utilization rate of the light source;
the optical film comprises a diffusion sheet and a prism sheet which is orthogonally placed and is positioned on the upper surface of the light guide plate.
Further, the interval between two adjacent Mini-LED light sources which are staggered and unevenly arranged is L, H is the distance between the top end of each Mini-LED light source and the lower surface of the light guide plate, the point A on the lower surface of the light guide plate corresponds to the illuminance of the point right above the corresponding single Mini-LED, the point B corresponds to the illuminance of the point right above the corresponding central point of the two Mini-LEDs, and E A 、E B For the illumination superposition value generated by Mini-LEDs around the point A, B, θ is the angle corresponding to the AB edge, and the illumination value satisfies the following formula:
wherein E (0) is the maximum illuminance value of the Mini-LED light source when the light source is vertically incident;
by calculating the proper light source distance L range and the light mixing distance H, the light mixing efficiency of the Mini-LED is improved, the occurrence of bright and dark light spots is prevented, and the full-screen brightness uniformity of the display device is not lower than 85%.
Further, in the non-uniform arrangement, the distance L between two adjacent Mini-LED light sources is 0.1-1mm, the number n of the longitudinal Mini-LED light sources is 300-350, and the number m of the transverse Mini-LED light sources is 500-550.
Further, each Mini-LED light source comprises a light source main body, a light source chip packaged in the light source main body, and two light source pins arranged at the bottom of the light source main body, wherein the two light source pins are respectively and correspondingly electrically connected with two connecting terminals of the matched connecting terminal group.
Further, the light reflecting microstructure is in a quadrangular pyramid shape protruding upwards, and the top end of the light reflecting microstructure is lower than the upper surface of the Mini-LED.
Further, the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incident surface, the rectangular corner area of the light guide plate is changed into a plane corner area, and an angle-in backlight source is arranged in the corner area.
Further, the angular backlight source adopts lamp beads with the power of 0.2-0.5W.
Further, the light guide plate is made of one or more of polymethyl methacrylate, polystyrene, polychloroprene, cycloolefin copolymer, polycarbonate and polydimethyl siloxane.
Further, reflecting covers are arranged at four corner areas of the light guide plate; the material of the reflecting cover is one or more of polyethylene terephthalate, polyurethane resin, polycarbonate, polyethylene and polymethyl methacrylate.
Further, the method comprises the following steps:
step S1: manufacturing a light guide plate unit;
step S2: the method comprises the steps that Mini-LED light sources are arranged on the lower surface of a light guide plate in a staggered and non-uniform mode, and each Mini-LED is electrically connected with a group of connection terminal pairs;
step S3: the light guide plate is provided with a quadrangular pyramid light reflection microstructure by staggering the Mini-LED light source on the lower surface, and the top end of the light guide plate is lower than the upper surface of the Mini-LED light source;
step S4: performing corner removal treatment on the light guide plate, grinding and polishing four corners to form a plane light incident surface, changing the rectangular corner area of the light guide plate into a plane corner area, and placing an angle-in backlight source at the cross sections of the plane corner areas at the four corners of the light guide plate;
step S5: arranging reflection covers at four corner areas of the light guide plate to completely cover the corner-entering type backlight source;
step S6: the reflecting sheet is added on the lower surface of the light guide plate and is used for reflecting the light rays transmitted from the bottom of the light guide plate, so that the utilization rate of the light source is improved;
step S7: adding an optical film on the upper surface of the light guide plate, comprising: a diffuser sheet and an orthogonally disposed prism sheet.
Compared with the prior art, the staggered and non-uniformly arranged Mini-LED direct type backlight module provided by the invention and the preferred scheme thereof has the advantages that the dosage of the Mini-LED light sources is greatly reduced due to the staggered and non-uniformly arranged design of the Mini-LED light sources and the quadrangular pyramid-shaped light reflection microstructure, and the brightness of the display device is improved by utilizing the light emitted by the Mini-LED light sources of the light reflection microstructure reflection part; by calculating the proper light source distance L and the light mixing distance H, the light mixing efficiency of the Mini-LED is improved, the occurrence of bright and dark light spots is prevented, and the full-screen brightness uniformity of the display device is not lower than 85%; in addition, in order to solve the problem of edge brightness decay in the prior direct type backlight display device, an angular light source is arranged at the edge angle area of the light guide plate to carry out edge brightness compensation.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a cross-sectional view of one embodiment of a staggered non-uniformly arranged Mini-LED direct backlight module of the present invention; (Mini-LEDs in the figure are visually uniformly arranged in a substantially non-uniform arrangement)
FIG. 2 is a schematic diagram of a direct backlight structure of an embodiment of a staggered non-uniformly arranged Mini-LED direct backlight module according to the present invention;
FIG. 3 is a top view of one embodiment of a staggered non-uniform array Mini-LED direct backlight module of the present invention; (Mini-LEDs in the figure are visually uniformly arranged in a substantially non-uniform arrangement)
FIG. 4 is a schematic diagram of a direct backlight module layout of one embodiment of a staggered non-uniformly arranged Mini-LED direct backlight module of the present invention; (Mini-LEDs in the figure are visually uniformly arranged in a substantially non-uniform arrangement)
FIG. 5 is a front cross-sectional view of one embodiment of a staggered non-uniformly arranged Mini-LED direct backlight module of the present invention;
in the figure: 1-a light guide plate; 2-Mini-LED light source; 3-a light source pin; 4-direct type backlight module; 5-light reflective microstructures; 6-corner-in backlight; 7-a reflective cover; 8-a reflector sheet; 9-optical film.
Detailed Description
In order to make the features and advantages of the present patent more comprehensible, embodiments accompanied with figures are described in detail below:
it should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 5, a Mini-LED direct type backlight module with staggered non-uniform arrangement according to an embodiment of the present invention includes: the backlight module comprises a light guide plate 1, a direct type backlight module 4, a light reflection microstructure 5, an angle-in type backlight source 6, a reflecting cover 7, a reflecting sheet 8 and an optical film 9;
the direct type backlight module is positioned on the lower surface of the light guide plate and consists of a plurality of Mini-LED light sources 2 which are staggered and unevenly arranged, and each Mini-LED is electrically connected with a group of connection terminal pairs;
the light reflection microstructures are positioned on the lower surface of the light guide plate, are formed by staggered non-uniform arrangement and are staggered with the Mini-LED light sources; the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incident surface, and an angle light incident backlight source is arranged in the corner plane area;
the reflecting cover is positioned at four corner areas of the light guide plate and completely covers the corner-in backlight source;
the reflecting sheet is positioned on the lower surface of the light guide plate and used for reflecting the light rays transmitted from the bottom of the light guide plate so as to increase the utilization rate of the light source;
the optical film comprises a diffusion sheet and a prism sheet which are orthogonally arranged and positioned on the upper surface of the light guide plate.
In this embodiment, as a preferred scheme, mini-LED light sources are arranged unevenly in a staggered manner, the distance between each other is L (L is not constant, and is a value within a range of values, thereby realizing uneven arrangement), the point A is the illuminance of the point directly above the center point of a single Mini-LED, the point B is the illuminance of the point directly above the center point of two Mini-LEDs, and E A 、E B For the illumination superposition value generated by Mini-LEDs around the point A, B, θ is the angle corresponding to the AB edge, H is the distance between the top of the Mini-LED light source and the lower surface of the light guide plate, and the illumination value satisfies the following formula:
wherein E (0) is the maximum illuminance value of the Mini-LED light source when the light source is vertically incident.
In this embodiment, as a preferred scheme, the distance L between two adjacent Mini-LED light sources is between 0.1 and 1mm, the number n of the longitudinal Mini-LED light sources is 300 to 350, and the number m of the transverse Mini-LED light sources is 500 to 550.
In this embodiment, as a preferred solution, each Mini-LED light source includes a light source body, a light source chip encapsulated in the light source body, and two light source pins 3 disposed at the bottom of the light source body, where the two light source pins are electrically connected to two connection terminals of the matched connection terminal group in a one-to-one correspondence manner.
In this embodiment, as a preferred scheme, the light reflecting microstructure is a pyramid shape protruding upwards, and its top is slightly lower than the top surface of the Mini-LED.
In this embodiment, as a preferable mode, the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a planar light incident surface, the corner area of the rectangular shape of the light guide plate is changed into the corner area of the planar shape, and the corner area is provided with the corner backlight.
In this embodiment, as a preferred solution, the angular backlight uses lamp beads with a power of 0.2-0.5W.
In this embodiment, as a preferred embodiment, the material of the light guide plate is one or more of polymethyl methacrylate, polystyrene, polychloroprene, cycloolefin copolymer, polycarbonate, and polydimethyl siloxane.
In this embodiment, as a preferred scheme, the four corner regions of the light guide plate are provided with reflective covers, and the reflective covers are made of one or more combinations of polyethylene terephthalate, polyurethane resin, polycarbonate, polyethylene and polymethyl methacrylate.
In this embodiment, as a preferred embodiment, the method for manufacturing the backlight display device is as follows:
(1) Manufacturing a light guide plate unit;
(2) The method comprises the steps that Mini-LED light sources are arranged on the lower surface of a light guide plate in a staggered and non-uniform mode, and each Mini-LED is electrically connected with a group of connection terminal pairs;
(3) The light guide plate is provided with a quadrangular pyramid light reflection microstructure by staggering the Mini-LED light source on the lower surface, and the top end of the light guide plate is slightly lower than the upper surface of the Mini-LED light source;
(4) Performing corner removal treatment on the light guide plate, grinding and polishing four corners to form a plane light incident surface, changing the rectangular corner area of the light guide plate into a plane corner area, and placing an angle-in backlight source at the cross sections of the plane corner areas at the four corners of the light guide plate;
(5) Arranging reflection covers at four corner areas of the light guide plate to completely cover the corner-entering type backlight source;
(6) The reflecting sheet is added on the lower surface of the light guide plate and is used for reflecting the light rays transmitted from the bottom of the light guide plate, so that the utilization rate of the light source is improved;
(7) An optical film such as a diffusion sheet or a prism sheet disposed perpendicularly to the upper surface of the light guide plate is added.
The following description will be given in more detail with reference to a specific example:
as shown in FIG. 1, in order to provide a cross-sectional view of a Mini-LED direct type backlight module with staggered and non-uniform arrangement, the invention determines that a 1-light guide plate is made of polymethyl methacrylate PMMA, 30 kg of polymethyl methacrylate PMMA and 20 kg of polycarbonate PC are placed in a melting device to be mixed, 3 kg of light diffusant, 1 kg of light stabilizer and 0.5 kg of heat stabilizer are added, in addition, 2.5 kg of silicone master batch and 7.5 kg of fused quartz sand are added for enhancing the hardness of the light guide plate, the materials are stirred until the materials are completely mixed, the materials are heated to 460 ℃, and then are injected into a mold at a speed of 190mm/s to be cooled and formed.
The 2-Mini-LED light sources are arranged on the 8-reflecting plate in a staggered and non-uniform mode at intervals L, the problems that light mixing is insufficient, the brightness of the middle area is too high and the periphery is dark due to too many dense Mini-LED light sources are effectively prevented, meanwhile, the consumption of the Mini-LED light sources is greatly reduced, and the service life is reduced due to poor heat dissipation are avoided. The Mini-LED light source is electrically connected with two connecting terminals of the matched connecting terminal group in a one-to-one correspondence manner through 3-light source pins. In addition, by the illuminance E A 、E B The optimal distance L and the light mixing distance H are obtained, and the brightness uniformity of the display device is further improved.
The 2-Mini-LED light sources are staggered on the 8-reflector plate to form 5-light reflection microstructures in staggered and non-uniform arrangement, the rectangular pyramid-shaped convex microstructures are manufactured by utilizing a photoetching technology, the microstructures face the light guide plate, the height of the microstructures is slightly lower than the upper surface of the 2-Mini-LED light sources, the microstructures are used for reflecting part of light emitted by the Mini-LED light sources, the light utilization rate is improved, and the problem of insufficient brightness caused by reduction of the Mini-LED light sources is prevented.
2835LED lamp beads are selected as 6-angle incident backlight sources in four corner areas of the light guide plate, the sizes L, W and H of the LED lamp beads are 2.8mm, 3.5mm and 0.7mm, the single brightness is 22 lumens, and the LED lamp beads have stronger heat dissipation capacity, so that the service life of the display device is prolonged. Because the total light emitting angle of the lamp beads is 120 degrees, the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light entering surface, the corner area of the rectangular shape of the light guide plate is changed into the corner area of the plane shape, and the angle after treatment is 120 degrees. Two corner-in backlights are respectively arranged at the cross sections of the planar corner areas of the four corners of the light guide plate, so that the edge brightness compensation of the Mini-LED direct type backlight is realized.
And placing polyurethane resin in a mould, heating the mould and the polyurethane resin to 120 ℃, performing compression molding on the polyurethane resin in a constant-temperature heating state, and performing vacuumizing treatment after the polyurethane resin is compressed so as to facilitate the adsorption molding of the polyurethane resin. And cooling the die after constant temperature and constant heat are carried out for a period of time in a die closing state, performing die separation action after cooling to a certain temperature, and finally cooling polyurethane resin at normal temperature by using a blowing cooling device to finish a die stripping step, thereby forming a 7-reflecting cover which is arranged at four corner areas of the light guide plate and completely coating the 6-angle-in type backlight source so as to enhance the light utilization rate of the angle-in type backlight source.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
The patent is not limited to the best mode, any person can obtain other various staggered and non-uniformly arranged Mini-LED direct type backlight modules under the teaching of the patent, and all equivalent changes and modifications made according to the scope of the patent are covered by the patent.
Claims (10)
1. A Mini-LED direct type backlight module with staggered and non-uniform arrangement is characterized in that: the backlight module comprises a light guide plate, a direct type backlight module, a light reflection microstructure, an angle-in type backlight source, a reflecting cover, a reflecting sheet and an optical film;
the direct type backlight module is positioned on the lower surface of the light guide plate and consists of a plurality of Mini-LED light sources which are staggered and unevenly arranged, and each Mini-LED is electrically connected with a group of connection terminal pairs;
the light reflection microstructures are positioned on the lower surface of the light guide plate and are staggered and unevenly arranged, and the arrangement structures are staggered with the Mini-LED light sources;
the light guide plate is subjected to corner removal treatment, four corners are ground and polished to form a plane light incident surface, and an angle light incident backlight source is arranged in a corner plane area;
the reflection covers are positioned at four corner areas of the light guide plate and completely cover the corner-in backlight source;
the reflecting sheet is positioned on the lower surface of the light guide plate and used for reflecting light rays transmitted from the bottom of the light guide plate so as to increase the utilization rate of the light source;
the optical film comprises a diffusion sheet and a prism sheet which is orthogonally placed and is positioned on the upper surface of the light guide plate.
2. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: the interval between two adjacent Mini-LED light sources which are staggered and unevenly arranged is L, H is the distance between the top end of each Mini-LED light source and the lower surface of the light guide plate, the point A on the lower surface of the light guide plate corresponds to the illuminance of the point right above the corresponding single Mini-LED, the point B corresponds to the illuminance of the point right above the corresponding central point of the two Mini-LEDs, and E A 、E B For the illumination superposition value generated by Mini-LEDs around the point A, B, θ is the angle corresponding to the AB edge, and the illumination value satisfies the following formula:
wherein E (0) is the maximum illuminance value of the Mini-LED light source when the light source is vertically incident;
by calculating the proper light source distance L range and the light mixing distance H, the light mixing efficiency of the Mini-LED is improved, the occurrence of bright and dark light spots is prevented, and the full-screen brightness uniformity of the display device is not lower than 85%.
3. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 2, wherein: in the non-uniform arrangement, the distance L between two adjacent Mini-LED light sources is 0.1-1mm, the number n of the longitudinal Mini-LED light sources is 300-350, and the number m of the transverse Mini-LED light sources is 500-550.
4. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 2, wherein: each Mini-LED light source comprises a light source main body, a light source chip packaged in the light source main body, and two light source pins arranged at the bottom of the light source main body, wherein the two light source pins are respectively and correspondingly electrically connected with two connecting terminals of the matched connecting terminal group.
5. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 2, wherein: the light reflection microstructure is in a quadrangular pyramid shape protruding upwards, and the top end of the light reflection microstructure is lower than the upper surface of the Mini-LED.
6. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: and (3) performing corner removal treatment on the light guide plate, grinding and polishing four corners to form a plane light incident surface, changing the rectangular corner area of the light guide plate into a plane corner area, and arranging an angle-incident backlight source in the corner area.
7. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: the angle-in type backlight source adopts lamp beads with the power of 0.2-0.5W.
8. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: the light guide plate is made of one or more of polymethyl methacrylate, polystyrene, polychloroprene, cycloolefin copolymer, polycarbonate and polydimethyl phenyl siloxane.
9. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: reflection covers are arranged at four corner areas of the light guide plate; the material of the reflecting cover is one or more of polyethylene terephthalate, polyurethane resin, polycarbonate, polyethylene and polymethyl methacrylate.
10. The staggered non-uniformly arranged Mini-LED direct type backlight module according to claim 1, wherein: the method comprises the following steps:
step S1: manufacturing a light guide plate unit;
step S2: the method comprises the steps that Mini-LED light sources are arranged on the lower surface of a light guide plate in a staggered and non-uniform mode, and each Mini-LED is electrically connected with a group of connection terminal pairs;
step S3: the light guide plate is provided with a quadrangular pyramid light reflection microstructure by staggering the Mini-LED light source on the lower surface, and the top end of the light guide plate is lower than the upper surface of the Mini-LED light source;
step S4: performing corner removal treatment on the light guide plate, grinding and polishing four corners to form a plane light incident surface, changing the rectangular corner area of the light guide plate into a plane corner area, and placing an angle-in backlight source at the cross sections of the plane corner areas at the four corners of the light guide plate;
step S5: arranging reflection covers at four corner areas of the light guide plate to completely cover the corner-entering type backlight source;
step S6: the reflecting sheet is added on the lower surface of the light guide plate and is used for reflecting the light rays transmitted from the bottom of the light guide plate, so that the utilization rate of the light source is improved;
step S7: adding an optical film on the upper surface of the light guide plate, comprising: a diffuser sheet and an orthogonally disposed prism sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211381145.1A CN116047807B (en) | 2022-11-01 | 2022-11-01 | Mini-LED direct type backlight module with staggered non-uniform arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211381145.1A CN116047807B (en) | 2022-11-01 | 2022-11-01 | Mini-LED direct type backlight module with staggered non-uniform arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116047807A true CN116047807A (en) | 2023-05-02 |
| CN116047807B CN116047807B (en) | 2024-10-11 |
Family
ID=86114439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211381145.1A Active CN116047807B (en) | 2022-11-01 | 2022-11-01 | Mini-LED direct type backlight module with staggered non-uniform arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116047807B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956926A (en) * | 2009-07-16 | 2011-01-26 | 瀚宇彩晶股份有限公司 | Backlight module of LCD |
| WO2012145945A1 (en) * | 2011-04-26 | 2012-11-01 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module thereof |
| CN103225773A (en) * | 2012-06-27 | 2013-07-31 | 南京大学 | Sidelight type LED dynamic backlight module and liquid crystal display device |
| CN203671404U (en) * | 2014-01-27 | 2014-06-25 | 青岛海信电器股份有限公司 | Direct lighting backlight module and display device |
| CN104089220A (en) * | 2014-06-30 | 2014-10-08 | 京东方科技集团股份有限公司 | Straight down type backlight source module |
| CN113504669A (en) * | 2021-06-22 | 2021-10-15 | 广州卓奥科技有限公司 | Hybrid backlight module and display equipment |
| CN115185125A (en) * | 2022-07-20 | 2022-10-14 | 福州大学 | Mini-LED light source embedded backlight module |
-
2022
- 2022-11-01 CN CN202211381145.1A patent/CN116047807B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956926A (en) * | 2009-07-16 | 2011-01-26 | 瀚宇彩晶股份有限公司 | Backlight module of LCD |
| WO2012145945A1 (en) * | 2011-04-26 | 2012-11-01 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module thereof |
| CN103225773A (en) * | 2012-06-27 | 2013-07-31 | 南京大学 | Sidelight type LED dynamic backlight module and liquid crystal display device |
| CN203671404U (en) * | 2014-01-27 | 2014-06-25 | 青岛海信电器股份有限公司 | Direct lighting backlight module and display device |
| CN104089220A (en) * | 2014-06-30 | 2014-10-08 | 京东方科技集团股份有限公司 | Straight down type backlight source module |
| CN113504669A (en) * | 2021-06-22 | 2021-10-15 | 广州卓奥科技有限公司 | Hybrid backlight module and display equipment |
| CN115185125A (en) * | 2022-07-20 | 2022-10-14 | 福州大学 | Mini-LED light source embedded backlight module |
Non-Patent Citations (1)
| Title |
|---|
| 李世保;吴大鸣;庄俭;张亚军;: "一种具有波形槽微结构的导光板设计", 液晶与显示, no. 04, 15 August 2011 (2011-08-15), pages 53 - 57 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116047807B (en) | 2024-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104471468B (en) | Display device | |
| US7553058B2 (en) | Optical plate and method for manufacturing same and backlight module using same | |
| EP3690532A1 (en) | Backlight module, display screen and terminal | |
| CN108732816B (en) | Area source backlight module and liquid crystal display panel | |
| US20090097273A1 (en) | Light guide plate and light-emitting apparatus | |
| WO2021221905A1 (en) | Display devices with tiled components | |
| KR20110080514A (en) | Backlight unit and display apparatus using thereof | |
| CN106226949B (en) | Diffusion plate and manufacturing method thereof, backlight module and display device | |
| US20080137196A1 (en) | Optical plate having three layers and backlight module with same | |
| KR101219591B1 (en) | Back light guide plate and manufacturing method for the same | |
| US20210325594A1 (en) | Backlight module, method for manufacturing the same, and liquid crystal display device | |
| CN201126482Y (en) | Construction of optical scattering tablet | |
| CN109976039A (en) | Light source assembly, backlight module and display device | |
| CN116047807B (en) | Mini-LED direct type backlight module with staggered non-uniform arrangement | |
| CN112346169A (en) | Novel direct type backlight module and LED light-emitting device thereof | |
| CN114842741A (en) | Light-emitting module and display device | |
| CN112180497A (en) | Glass light guide plate and glass diffusion plate fuse structure in a poor light | |
| US20090116219A1 (en) | Prism sheet and backlight module using the same | |
| WO2020206790A1 (en) | Backlight module and display device | |
| CN214097850U (en) | Novel direct type backlight module and LED light-emitting device thereof | |
| KR101515134B1 (en) | Lamp device within resin layer for light-guide, method of manufacturing the same and LCD using the same | |
| CN210006416U (en) | light diffusion module suitable for lamp box | |
| CN210123507U (en) | Backlight module and display device | |
| CN116224659B (en) | Backlight module filled with optical cement and display device formed by backlight module | |
| CN216772153U (en) | 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 |