WO2021057750A1 - Module de rétroéclairage et dispositif d'affichage - Google Patents

Module de rétroéclairage et dispositif d'affichage Download PDF

Info

Publication number
WO2021057750A1
WO2021057750A1 PCT/CN2020/116956 CN2020116956W WO2021057750A1 WO 2021057750 A1 WO2021057750 A1 WO 2021057750A1 CN 2020116956 W CN2020116956 W CN 2020116956W WO 2021057750 A1 WO2021057750 A1 WO 2021057750A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
light
backlight module
mini led
pits
Prior art date
Application number
PCT/CN2020/116956
Other languages
English (en)
Chinese (zh)
Inventor
刘欣
尤君平
Original Assignee
深圳创维－Rgb电子有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 深圳创维－Rgb电子有限公司 filed Critical 深圳创维－Rgb电子有限公司
Publication of WO2021057750A1 publication Critical patent/WO2021057750A1/fr

Links

Images

Classifications

    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along 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
    • G02F1/133—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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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

Definitions

  • the present disclosure relates to the technical field of display devices, for example, to a backlight module and a display device.
  • Mini LED chip is an LED chip with a chip size of about 100 ⁇ m ⁇ 100 ⁇ m. It has the advantages of high color saturation, local dimming, high brightness, and energy saving. It can be applied to backlight displays and has become a recent research hotspot.
  • an existing Mini LED backlight display structure includes a backplane frame 10, a plurality of Mini LED light panels 20 are arranged side by side inside the backplane frame, and a support frame 30 is provided above the Mini LED light panels.
  • the diffuser 40 and the diaphragm 50, the existing Mini LED backlight display structure has the following defects: (1) There are splicing gaps between the Mini LED lamp panels, and grid patterns are prone to appear in visual effects; (2) due to light mixing The distance is small, the support frame will have a serious support shadow on the diffuser; (3) There is light energy crosstalk between the Mini LED lamp panels, the existing Mini LED backlight display structure design is unreasonable, and the backlight display effect is not good.
  • the purpose of the present disclosure is to provide a backlight module and a display device, which aims to solve the technical problems of unreasonable design of the existing Mini LED backlight display structure and poor backlight display effect.
  • a backlight module which includes a Mini LED light board, and a light guide body arranged above the Mini LED light board, the cross section of the light guide body is an inverted trapezoid, and the side walls of the light guide body and/ Or the bottom surface of the light guide body is provided with a microstructure array, and the side wall surface of the light guide body is pasted with a reflective film.
  • the microstructure array is composed of a number of pits, and the shape of the pits is any one of a cone shape, a hemispherical shape, and a quadric shape.
  • the backlight module wherein the microstructure array includes a plurality of hemispherical pits, and on the sidewall of the light guide, the arrangement density of the pits varies from bottom to top.
  • the Gaussian curve changes from small to large.
  • the backlight module wherein the top surface of the light guide body is a rough surface or the top surface of the light guide body is sprayed with PMMA particles.
  • each of the plurality of pits is arranged in a hexagonal shape with the surrounding pits.
  • the backlight module wherein the density of the pits is among them, Is the diameter of the pit, and x and y are the distance between adjacent horizontal rows and the distance between adjacent vertical rows, respectively.
  • the Mini LED lamp board includes a PCB board and a number of LED lamp beads arranged on the PCB board, and a number of circuit loops are printed on the PCB board. Each of the LED lamp beads is connected to one of the circuit loops.
  • the backlight module wherein a spacer block is provided on the PCB board, the height of the spacer block is higher than the height of the LED lamp bead, and the bottom surface of the light guide is connected to the spacer The top of the block is glued together.
  • the Mini LED light board is packaged with flip-chip Mini LED chips.
  • the top of the side wall of the light guide is provided with a vertical surface that facilitates the mutual splicing of a plurality of the light guides.
  • the light guide is an optical resin light guide.
  • the light guide body is in the shape of a prism frustum or a truncated frustum.
  • the light guide body has a quadrangular pyramid shape.
  • the reflective film is a silver reflective film.
  • a display device which includes the aforementioned backlight module.
  • the present disclosure provides a backlight module and a display device, wherein the backlight module includes a Mini LED light board, and a light guide body arranged above the Mini LED light board.
  • the cross section is an inverted trapezoid
  • the side wall of the light guide body and/or the bottom surface of the light guide body is provided with a microstructure array
  • the side wall surface of the light guide body is pasted with a reflective film. Since the backlight module of the present disclosure adopts a light guide with an inverted trapezoidal cross-section to guide light, the inverted trapezoidal light guide can convert the point light source emitted by the Mini LED into a surface light source, and the light guide is on the bottom surface and/or The sidewall is provided with a microstructure array.
  • the microstructure array can enhance the scattering of light inside the light guide, so that more light inside the light guide is emitted from the top surface.
  • the backlight assembly of the present disclosure can be formed by splicing multiple light guides. The entire large-size light-emitting surface provides more uniform light output and better backlight effect.
  • FIG. 1 is a schematic diagram of the structure of a conventional backlight module
  • FIG. 2 is a schematic diagram of the structure of a backlight module of the present disclosure
  • FIG. 3 is a schematic diagram of the change of a Gaussian curve of the disclosure.
  • FIG. 4 is a schematic diagram of the definition of the density of pits (light guide dots) in the present disclosure
  • FIG. 5 is a schematic diagram of a usage scenario of a backlight module of the present disclosure.
  • the present disclosure provides a backlight module and a display device.
  • a backlight module and a display device.
  • the present disclosure will be described in further detail below. It should be understood that the specific embodiments described here are only used to explain the present disclosure, but not used to limit the present disclosure.
  • the present disclosure provides a backlight module, including a Mini LED light board 60, and a light guide 70 disposed above the Mini LED light board.
  • the light guide has an inverted trapezoid in cross section.
  • the side wall of the light body and/or the bottom surface of the light guide body is provided with a microstructure array 80, and the surface of the side wall of the light guide body is pasted with a reflective film 90.
  • the purpose of the technical solution of the present disclosure is to provide a Mini LED backlight module structure that is different from the prior art.
  • the Mini LED backlight module structure can realize ultra-high brightness and ultra-high color gamut display backlights, and solve the traditional Mini LED backlight module is a technical problem with poor backlight display effect.
  • the inverted trapezoidal light guide in the technical solution of the present disclosure can be cut into an isosceles trapezoid or a right-angled trapezoid from any light guide plate (acrylic board, PC board or PS board) in the prior art.
  • the light guide plate has a very high refractive index (refractive index can be selected 1.5), and a microstructure array is arranged on the bottom surface of the light guide.
  • the microstructure array is mainly composed of a number of light guide dots (pits), and the shape of the light guide dots is cone Shape, hemispherical or quadric shape, etc., and can be made by processing methods such as hot pressing, laser engraving or screen printing.
  • the light emitted by the Mini LED lamp is in contact with the light guide mesh points in the microstructure array on the bottom surface of the light guide. Then it can diffuse to all angles.
  • the microstructure array improves the absorption rate of the light emitted from the Mini LED lamp on the bottom of the light guide.
  • the side wall of the light guide can also be provided with a microstructure array to enhance the scattering of light by the side wall of the light guide, and a reflective film is attached to the surface of the side wall of the light guide to prevent light leakage.
  • the microstructure array includes a plurality of hemispherical pits, and on the sidewall of the light guide, the arrangement density of the pits increases from the bottom to the top according to the Gaussian curve. To a big change.
  • the arrangement of the microstructure arrays on the sidewall of the light guide and the bottom surface of the light guide may be different.
  • the specifications of the pits (light guide dots) on the bottom surface (light incident surface) of the light guide are the same, and Evenly arranged, for example, the diameter of the light guide dots can be 50 ⁇ m, and the spacing between the light guide dots can be set to 60 ⁇ m.
  • the specific function of the light guide dots on the bottom surface of the light guide is to scatter the incident light and diverge the incident light from the Mini LED. The angle is expanded from 120° to about 150°, and the light that is totally reflected by the top surface of the light guide body and returned to the light incident surface is reflected and scattered.
  • the density of pits at the top of the side wall of the light guide should be higher than the density of pits at the bottom of the side wall of the light guide, because the light density inside the light guide will be lower along the side wall, in order to prevent obvious light and shade. Change, balance the difference of light and darkness by controlling the density of pits from the top to the bottom of the side wall to affect the scattering intensity of light.
  • the density of the pits on the side wall of the light guide body from the bottom of the side wall to the top of the side wall is as shown in the figure
  • M and A are constants, which together affect the curvature value of the dot density distribution curve.
  • the values of M and A can be adjusted according to the actual optical performance that needs to be achieved. Under this kind of Gaussian curve change trend, the light emitted from the surface of the light guide can be more uniform.
  • each pit is equal to
  • the surrounding pits are arranged in a hexagonal shape, and the pit density can be defined as Is the diameter of the pit, the minimum diameter of the pit on the side wall is 100 ⁇ m, x, y are the distance between adjacent horizontal rows and the distance between adjacent vertical rows, in one case, x, The size of y can also be equal.
  • the end density distribution can also be adjusted locally.
  • the overall function of the microstructure array provided on the light guide of the present disclosure is The secondary light distribution is carried out for the total reflected light inside the light guide, so that the light energy can reach the corner area and exit from the top light emitting surface, and make its divergence more uniform.
  • the top surface of the light guide is a rough surface or the top surface of the light guide is sprayed with PMMA particles.
  • the top surface of the light guide can be roughened.
  • a suede structure can be formed on the top surface of the light guide to improve light scattering.
  • a scattering layer can be sprayed on the surface of the light guide.
  • the scattering layer is mainly composed of PMMA particles and OCA optical glue.
  • the thickness of the scattering layer should be uniform.
  • the thickness of the scattering layer can be set to 0.1mm to achieve Very good light scattering effect.
  • the Mini LED light board includes a PCB board 100 and a number of LED lamp beads 110 arranged on the PCB board, and a number of circuit circuits are printed on the PCB board. , Each of the LED lamp beads is connected to one of the circuit loops.
  • each LED lamp bead is controlled by a separate circuit loop, that is, the Mini LED backlight of the present disclosure can be combined with Local Dimming technology to control in real time according to the bright and dark fields of the screen in the TV signal.
  • the switch and brightness adjustment corresponding to the backlight area can make the black blacker, whiter whiter, and more natural and beautiful in the picture.
  • the visual fidelity brings the best immersive experience.
  • all circuit loops can be used. It is connected to a power management chip or the pins of multiple power management chips in groups to realize the individual control of each LED lamp bead.
  • the power management chip can use HIP6301, IS6537 or RT9237 power management chips.
  • the Mini LED package of the technical solution of the present disclosure can also use flip-chip Mini LED chips to achieve uniform light mixing. Since the flip-chip Mini LED chip itself has a small structure, it is beneficial to make the local dimming zones more detailed. , So as to achieve a higher dynamic range (HDR) and achieve a higher contrast effect. On the other hand, it can also shorten the optical mixing distance (OD) to reduce the thickness of the whole machine to achieve the purpose of ultra-thinness.
  • HDR dynamic range
  • OD optical mixing distance
  • the backlight module adopting the Mini LED light board of the present disclosure can be used for AIOT screen display.
  • the specific application scenarios are: when R, G, B LEDs are all on and Mini LED light boards are all running, the backlight only provides full White field, the display terminal is in the normal viewing mode.
  • the R, G, and B three-color lights on the Mini LED light board can be designed as single-channel control, and each Mini LED light board can achieve single-channel control, which can be achieved through power control.
  • Multiple combined screen display modes with multiple colors and multiple partitions. This mode can be used to respond to multiple AIOT intelligent commands and display AIOT functions on the screen.
  • the PCB board is provided with a spacer block 120, the height of the spacer block is higher than the height of the LED lamp beads, the bottom surface of the light guide and the The top of the spacer is glued together.
  • the spacer is fixed on the PCB by means of a patch.
  • the material of the spacer can be PC or metal.
  • the height of the spacer should be 0.2-0.4mm higher than the height of the LED lamp bead during the specific setting.
  • the function of the spacer is mainly Isolate the light guide and the Mini LED to avoid direct contact and extrusion between the two. At the same time, the gap between the light guide and the Mini LED facilitates the heat dissipation of the Mini LED, thereby prolonging the service life of the Mini LED.
  • the top of the side wall of the light guide is provided with a vertical surface 130 that facilitates the mutual splicing of a plurality of the light guides.
  • a large light-emitting surface can be formed by splicing.
  • the vertical surface is provided, and the vertical surface can facilitate the splicing and contact between the side walls of the light guides, reduce the gap between the light guides after splicing, and make the light guides more compact and the light output more uniform.
  • the R, G, and B three-color light emitted by the LED light board is mixed into white light in the light guide body, and is emitted from the top light emitting surface under the action of the light guide dots on the side wall to form a uniform light output.
  • Several light guide bodies are spliced to form one With a complete direct-lit backlight light-emitting surface, the technical solution of the present disclosure can effectively solve the problems of splicing seams and bracket shadows in traditional Mini LED backlights, and can achieve ultra-high color gamut indicators, ultra-high brightness indicators and precise regional dimming functions , And can save the cost of diffuser and diaphragm, optimize the backlight structure, and highlight the cost-reducing effect.
  • the light guide is an optical resin material light guide.
  • Optical resin materials are optical resins made of high molecular organic compounds by compression molding or injection molding. Commonly used optical resin materials are propylene diethylene glycol carbonate (CR-39), polymethyl methacrylate (PMMA) and Polycarbonate (PC), the role of the light guide in the technical solution of the present disclosure is to expand the point light source into a surface light source.
  • the light guide of the present disclosure can be made of polymethyl methacrylate (PMMA) material ,
  • the refractive index of polymethyl methacrylate is 1.49, the light can be totally reflected inside the light guide, and its light transmittance can reach 92%. It is light in weight and high in hardness. It is very suitable for use as a light guide. material.
  • the light guide has a prism frustum shape or a truncated frustum shape.
  • the light guide used in the technical solution of the present disclosure includes, but is not limited to, a prism frustum shape or a truncated frustum shape.
  • the light guide body is a prism frustum shape, it can be specifically selected as a quadrangular prism frustum shape, and the cross section of the quadrangular prism frustum is an isosceles trapezoid. The four sides of the mesa are flat, which reduces the difficulty of processing.
  • the inclination angle of the hypotenuse of the isosceles trapezoid with respect to the bottom surface can be selected to be 30°.
  • the interior of the isosceles trapezoid has sufficient light mixing distance.
  • the thickness of the isosceles trapezoid can be made thinner, which indirectly makes display devices such as televisions thinner, and significantly improves the appearance design of the display device.
  • the reflective film is a silver reflective film.
  • the silver reflective film can reflect most of the light emitted from the side of the light guide, thereby increasing the luminous flux emitted from the top of the light guide, reducing light leakage from the side, and improving the brightness of the entire backlight assembly.
  • the reflective film in the present disclosure can be any metal reflective film.
  • the metal reflective film is used because generally metals have a large extinction coefficient. When the light beam is incident on the metal surface from the air, it enters the metal. The light amplitude inside the metal decays rapidly, so that the light energy entering the metal decreases correspondingly, while the reflected light energy increases. The greater the extinction coefficient, the faster the light amplitude decays, the less light energy entering the metal, the higher the reflectivity, and the metal
  • the reflective film also has the advantages of simple preparation process and wide working wavelength range.
  • the present disclosure also provides a display device including the above-mentioned backlight module.
  • a Mini LED backlight module suitable for AIOT screen display.
  • This module is suitable for the ultra-thin direct backlight design of LCD screens and TV display devices.
  • the light source uses R, G, Mini LED light board with B three-color LED, R, G, B three-color LED can realize single-channel control through circuit design, and Mini LED adopts single-channel control, which can realize multi-color, multi-partition combined screen display mode ,
  • the point light source of Mini LED is converted into a uniform surface light source through the light guide body, and then multiple light guide bodies are seamlessly spliced to achieve high image quality and multi-zone light emitting surface.
  • This backlight design solution can support the viewing function of ordinary flat-screen TVs, and It can realize AIOT intelligent command screen display and diversification, highlighting the advanced nature.
  • the present disclosure provides a backlight module and a display device, wherein the backlight module includes a Mini LED light board, and a light guide body arranged above the Mini LED light board, and the light guide
  • the cross section of the body is an inverted trapezoid
  • the side wall of the light guide body and/or the bottom surface of the light guide body is provided with a microstructure array
  • the side wall surface of the light guide body is pasted with a reflective film. Since the backlight module of the present disclosure uses a light guide with an inverted trapezoidal cross-section to guide light, the inverted trapezoidal light guide can convert the point light source emitted by the Mini LED into a surface light source.
  • the wall is arranged with a microstructure array, which can enhance the scattering of light inside the light guide, so that more light inside the light guide is emitted from the top surface.
  • the backlight assembly of the present disclosure can be formed by splicing the light guide to form a whole The large-sized light-emitting surface makes the light output more uniform and the backlight effect is better.

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)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne un module de rétroéclairage et un dispositif d'affichage. Le module de rétroéclairage comprend une carte de lampe à mini-DEL et un corps de guidage de lumière disposé au-dessus de la carte de lampe à mini-DEL ; le corps de guidage de lumière a une section transversale trapézoïdale inversée, un réseau de microstructures est disposé sur une paroi latérale du corps de guidage de lumière et/ou sur la surface inférieure du corps de guidage de lumière, et un film réfléchissant est collé à la surface de la paroi latérale du corps de guidage de lumière. Le module de rétroéclairage de la présente invention utilise un corps de guidage de lumière ayant une section transversale trapézoïdale inversée pour guider la lumière, le corps de guidage de lumière trapézoïdal inversé peut convertir une source de lumière ponctuelle émise par la mini-DEL en une source de lumière de surface, le réseau de microstructures est disposé sur la surface inférieure et/ou la paroi latérale du corps de guidage de lumière, et le réseau de microstructures peut améliorer la diffusion de la lumière à l'intérieur du corps de guidage de lumière, de telle sorte que la lumière à l'intérieur du corps de guidage de lumière est principalement émise à partir de la surface supérieure. Un ensemble de rétroéclairage de la présente invention peut former une surface entière de sortie de lumière de grande taille par assemblage d'une pluralité de corps de guidage de lumière, ayant ainsi une émission de lumière uniforme et un bon effet de rétroéclairage.
PCT/CN2020/116956 2019-09-24 2020-09-23 Module de rétroéclairage et dispositif d'affichage WO2021057750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910906882.0 2019-09-24
CN201910906882.0A CN110609418A (zh) 2019-09-24 2019-09-24 一种背光模组及显示设备

Publications (1)

Publication Number Publication Date
WO2021057750A1 true WO2021057750A1 (fr) 2021-04-01

Family

ID=68892233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/116956 WO2021057750A1 (fr) 2019-09-24 2020-09-23 Module de rétroéclairage et dispositif d'affichage

Country Status (2)

Country Link
CN (1) CN110609418A (fr)
WO (1) WO2021057750A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110609418A (zh) * 2019-09-24 2019-12-24 深圳创维－Rgb电子有限公司 一种背光模组及显示设备
CN111365655A (zh) * 2020-04-13 2020-07-03 常州星宇车灯股份有限公司 缩短rgb混光距离的光学结构和方法
WO2022241687A1 (fr) * 2021-05-19 2022-11-24 京东方科技集团股份有限公司 Module de rétroéclairage, dispositif d'affichage et procédé de fabrication
CN113534537A (zh) * 2021-07-28 2021-10-22 南京京东方显示技术有限公司 背光模组及显示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070183038A1 (en) * 2006-02-08 2007-08-09 Samsung Electronics Co., Ltd. Polarized light emitting light guide plate, method of manufacturing the same and illuminator for flat panel display device using polarized light emitting light guide plate
CN201517744U (zh) * 2009-09-11 2010-06-30 康佳集团股份有限公司 一种导光板
CN202419335U (zh) * 2011-10-28 2012-09-05 Tcl光电科技(惠州)有限公司 液晶显示器及直下式led背光模组
CN103017085A (zh) * 2012-12-14 2013-04-03 京东方科技集团股份有限公司 反射透镜、使用该反射透镜的背光模组和显示装置
CN206470501U (zh) * 2016-12-26 2017-09-05 南京中电熊猫液晶显示科技有限公司 一种背光模组
CN108873153A (zh) * 2018-07-18 2018-11-23 福州大学 基于量子点体导光板的侧入式背光模组出光控制方法
CN110609418A (zh) * 2019-09-24 2019-12-24 深圳创维－Rgb电子有限公司 一种背光模组及显示设备

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005197072A (ja) * 2004-01-07 2005-07-21 Matsushita Electric Ind Co Ltd 平面光源装置
WO2005121639A1 (fr) * 2004-06-08 2005-12-22 Fuji Photo Film Co., Ltd. Guide d’onde optique, appareil d’éclairage planaire et appareil d’affichage à cristaux liquides utilisant le guide d’onde optique
JPWO2006028080A1 (ja) * 2004-09-06 2008-05-08 富士フイルム株式会社 透過率調整体ユニット、面状照明装置、それを用いる液晶表示装置および透過率調整体の配置方法
JP2007248484A (ja) * 2006-03-13 2007-09-27 Sony Corp 表示装置
EP1959277B1 (fr) * 2007-02-14 2011-04-13 Chi Lin Technology Mélangeur de lumière et module de rétroéclairage doté de celui-ci
CN102155685A (zh) * 2011-02-18 2011-08-17 深圳市华星光电技术有限公司 背光模块
KR20130000903A (ko) * 2011-06-24 2013-01-03 엘지이노텍 주식회사 백라이트 유닛 및 그를 이용한 디스플레이 장치
CN202110309U (zh) * 2011-07-04 2012-01-11 北京京东方光电科技有限公司 一种导光板、背光源及显示装置
CN103779489A (zh) * 2013-12-30 2014-05-07 迪源光电股份有限公司 一种具有导光孔结构的发光二极管
JP6827635B2 (ja) * 2016-12-09 2021-02-10 日亜化学工業株式会社 面光源装置、表示装置及び電子機器
CN207067606U (zh) * 2017-08-21 2018-03-02 深圳创维－Rgb电子有限公司 背光模组及显示装置
KR20190021522A (ko) * 2017-08-22 2019-03-06 희성전자 주식회사 도광체 및 이를 구비하는 백라이트 장치
CN108897091B (zh) * 2018-05-29 2021-06-01 深圳创维－Rgb电子有限公司 一种复合型直下式背光模组
CN109856859A (zh) * 2019-03-27 2019-06-07 深圳创维－Rgb电子有限公司 一种侧入式背光模组及显示设备
CN110133793B (zh) * 2019-05-30 2021-06-01 深圳创维－Rgb电子有限公司 一种导光膜及显示装置
CN110208987A (zh) * 2019-06-26 2019-09-06 深圳创维－Rgb电子有限公司 直下式背光模组及显示器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070183038A1 (en) * 2006-02-08 2007-08-09 Samsung Electronics Co., Ltd. Polarized light emitting light guide plate, method of manufacturing the same and illuminator for flat panel display device using polarized light emitting light guide plate
CN201517744U (zh) * 2009-09-11 2010-06-30 康佳集团股份有限公司 一种导光板
CN202419335U (zh) * 2011-10-28 2012-09-05 Tcl光电科技(惠州)有限公司 液晶显示器及直下式led背光模组
CN103017085A (zh) * 2012-12-14 2013-04-03 京东方科技集团股份有限公司 反射透镜、使用该反射透镜的背光模组和显示装置
CN206470501U (zh) * 2016-12-26 2017-09-05 南京中电熊猫液晶显示科技有限公司 一种背光模组
CN108873153A (zh) * 2018-07-18 2018-11-23 福州大学 基于量子点体导光板的侧入式背光模组出光控制方法
CN110609418A (zh) * 2019-09-24 2019-12-24 深圳创维－Rgb电子有限公司 一种背光模组及显示设备

Also Published As

Publication number Publication date
CN110609418A (zh) 2019-12-24

Similar Documents

Publication Publication Date Title
WO2021057750A1 (fr) Module de rétroéclairage et dispositif d'affichage
TWI536081B (zh) 背光單元及使用該背光單元的顯示裝置
CN106019697A (zh) 显示装置
CN102901000B (zh) 背光单元和使用该背光单元的显示装置
KR20130061796A (ko) 광학 어셈블리, 백라이트 유닛 및 그를 이용한 디스플레이 장치
JP2010272245A (ja) バックライトユニットおよびこれを備えた液晶表示装置
CN106842701A (zh) 一种背光模组和液晶显示器
KR102461674B1 (ko) 광학필름
CN103017085A (zh) 反射透镜、使用该反射透镜的背光模组和显示装置
KR20160016020A (ko) 균일한 휘도가 가능한 반사판 및 이를 구비한 액정표시소자
US11822183B2 (en) Display apparatus
CN214751236U (zh) 一种显示装置
WO2021248970A1 (fr) Appareil d'affichage
WO2019056985A1 (fr) Plaque de guidage de lumière, module de rétroéclairage et dispositif d'affichage
CN203363863U (zh) 一种直下式背光模组和显示装置
US10782469B2 (en) Light guide plate and its fabricating method, as well as backlight module
CN103234172B (zh) 一种扩散板结构及其在背光模组中的应用
US8567979B2 (en) LED lens, back light module and liquid crystal display device
WO2023284641A1 (fr) Module de rétroéclairage et affichage à cristaux liquides
CN115327818A (zh) 一种背光模组、背光模组的制备方法及显示装置
CN201795430U (zh) 一种led背光模组的直下式导光板
CN112987394B (zh) 一种显示装置
CN114137764A (zh) 背光模组及显示装置
KR101654373B1 (ko) 백라이트 유닛 및 그를 이용한 디스플레이 장치
CN201706302U (zh) 背光模组和液晶显示器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20867461

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20867461

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17/10/2023)

122 Ep: pct application non-entry in european phase

Ref document number: 20867461

Country of ref document: EP

Kind code of ref document: A1