WO2020207102A1 - Dispositif de source de lumière de zone et son procédé de fabrication, et dispositif d'affichage - Google Patents

Dispositif de source de lumière de zone et son procédé de fabrication, et dispositif d'affichage Download PDF

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Publication number
WO2020207102A1
WO2020207102A1 PCT/CN2020/073521 CN2020073521W WO2020207102A1 WO 2020207102 A1 WO2020207102 A1 WO 2020207102A1 CN 2020073521 W CN2020073521 W CN 2020073521W WO 2020207102 A1 WO2020207102 A1 WO 2020207102A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
light source
opening
source device
pcb
Prior art date
Application number
PCT/CN2020/073521
Other languages
English (en)
Chinese (zh)
Inventor
熊充
Original Assignee
深圳市华星光电半导体显示技术有限公司
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 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Publication of WO2020207102A1 publication Critical patent/WO2020207102A1/fr

Links

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
    • G02F1/133603—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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the invention relates to the field of display technology, in particular to a surface light source device, a preparation method thereof, and a display device.
  • liquid crystal display is a passive light-emitting element.
  • the display itself does not emit light, but is illuminated by the backlight below it.
  • the backlight source and the liquid crystal display are combined to form a liquid crystal display module.
  • the so-called BackLight is a light source located behind the liquid crystal display (LCD), and its luminous effect will directly affect the visual effect of the liquid crystal display module (LCM).
  • the backlight source is mainly composed of a light source, a light guide plate, an optical film, and a plastic frame.
  • the backlight has the characteristics of high brightness, long life and uniform light emission. According to different light source distribution positions, it is divided into direct-lit backlight and edge-lit backlight.
  • the direct type backlight is to place the light source (LED chip array) and the printed circuit board at the bottom of the backlight. After the light is emitted from the LED, it passes through the bottom reflector, and then passes through the diffuser and brightness enhancement film on the surface evenly.
  • the edge-lit backlight is a backlight made by placing a linear or point light source on the side of a specially designed light guide plate.
  • the principle of the light guide plate is to use the dot distribution at the bottom of the light guide acrylic plate to destroy the interference phenomenon of light, and evenly convert the line light source into a surface light source. Its role is to guide the scattering direction of the light and make the light distribution more uniform so that it cannot be seen from the front.
  • the shadow to the reflection point is used to improve the brightness of the panel and to ensure the uniformity of the panel brightness.
  • the excellent light guide plate has a great influence on the backlight.
  • the LCD backlight is a flat, uniform lighting device.
  • the cold cathode fluorescent tubes or LED strips as the light source are arranged on both sides or one side of the entire backlight (it may be the long side or the short side).
  • the cold cathode tube is a linear light source, and the LED is a point light source.
  • a light guide plate is needed to convert this light source into a surface light source.
  • the light guide plate is generally made of acrylic plastic with high light transmittance, and the surface is very smooth and flat, so that most of the internal light will be regularly reflected on the flat surface and will not be emitted to the outside of the light guide plate.
  • White dots are printed on the bottom of the light guide plate of the liquid crystal display.
  • the light guide plate At the position where the light guide plate is printed with dots, the light will no longer be totally reflected regularly but will be emitted above the light guide plate. Controlling the density of dots at each position can control how much light the light guide plate emits at this position. Precisely designed light guide plate dots can spread the incident light on both sides evenly on the entire plane. Optical films will be placed above the light guide plate. These films can uniform light and gather large-angle light for frontal observation.
  • Mini-LEDs are used in TV backlights.
  • a common solution is to print blue mini-LEDs on the PCB to form an LED array, and then place an optical diffusion film and a wavelength conversion material film above the LEDs to produce uniform white light.
  • Surface light source Due to the limitation of the LED printing machine, the size of the PCB cannot be very large, so multiple PCBs need to be spliced into a large light emitting surface light source. This will cause two problems. One is that the slits at the PCB splicing place will bring about taste problems such as dark lines, and the other is that the inconsistency of the ink reflectivity and color difference of each PCB will cause blocky mosaics with uneven brightness.
  • the wavelength conversion material film above the LED also has the problems of thick thickness and high cost, which is not conducive to the design requirements of thinning. Therefore, it is necessary to find a new type of surface light source device to solve the above problems.
  • the present invention sets out to solve the problem and also proposes a thin design of the QD solution.
  • An object of the present invention is to provide a surface light source device, a preparation method thereof, and a display device, which can solve the optical taste problems such as mosaic phenomenon caused by PCB ink differences in the current surface light source device and dark lines caused by splicing slits.
  • an embodiment of the present invention provides a surface light source device, which includes: a substrate, a reflective layer, a photoresist layer, a QD layer, an encapsulation layer, and a PCB module.
  • the reflective layer is arranged on the substrate at intervals, wherein a first opening is formed between two adjacent reflective layers; the photoresist layer is correspondingly arranged on the reflective layer, and two adjacent photoresist layers A second opening is formed between the second opening, and the second opening is provided corresponding to the first opening; the QD layer is provided in the first opening between the reflective layers; the encapsulation layer is provided on the photoresist layer And the second opening;
  • the PCB module includes: a PCB and an LED, the PCB is arranged on the encapsulation layer, the LEDs are arranged at intervals on the surface of the PCB facing the encapsulation layer, wherein each The setting position of the LED downward corresponds to the position of the QD layer.
  • the reflective layer is a metal reflective layer.
  • constituent material of the metal reflective layer includes one or more of aluminum, silver and titanium.
  • the PCB module includes two or more than two.
  • the position of the splicing seam between two adjacent PCB modules corresponds to the position of the reflective layer.
  • Another embodiment of the present invention also provides a method for preparing the surface light source device of the present invention, which includes the following steps:
  • the preparation method of the surface light source device further includes: S7, immersing the LED in the encapsulation layer for lighting, detecting and adjusting the position of the LED to correspond to the position of the QD layer by a CCD camera.
  • the reflective layer is prepared by sputtering or deposition.
  • the LED is arranged on the PCB by welding.
  • Another embodiment of the present invention also provides a display device, which includes the surface light source device related to the present invention.
  • the present invention relates to a surface light source device, a preparation method thereof, and a display device.
  • the splicing seam between PCB modules and the PCB correspond to the reflective layer.
  • the position is set, the blue light emitted by the LED is converted into white light after QD.
  • the white light is reflected by the optical scattering material and no longer passes through the PCB ink and slits, but is directly reflected by the reflective layer.
  • the QD layer is encapsulated in the opening area of the reflective layer, which is conducive to the realization of a thin white surface with high color gamut light source.
  • Fig. 1 is a schematic structural diagram of Embodiment 1 of a surface light source device of the present invention.
  • Fig. 2 is a working schematic diagram of Embodiment 2 of the surface light source device of the present invention.
  • Embodiment 3 is a schematic diagram of the first preparation of Embodiment 1 of the surface light source device of the present invention.
  • FIG. 4 is a schematic diagram of the second preparation of Embodiment 1 of the surface light source device of the present invention.
  • FIG. 5 is a schematic diagram of the third preparation of Embodiment 1 of the surface light source device of the present invention.
  • Fig. 6 is a fourth schematic diagram of the preparation of Embodiment 1 of the surface light source device of the present invention.
  • FIG. 7 is a fifth schematic diagram of the preparation of Embodiment 1 of the surface light source device of the present invention.
  • FIG. 8 is a schematic diagram of the sixth preparation of Embodiment 1 of the surface light source device of the present invention.
  • the component can be directly placed on the other component; there may also be an intermediate component on which the component is placed , And the intermediate component is placed on another component.
  • a component is described as “installed to” or “connected to” another component, both can be understood as directly “installed” or “connected”, or a component is “installed to” or “connected to” through an intermediate component Another component.
  • a surface light source device 100 includes: a substrate 1, a reflective layer 2, a photoresist layer 3, a QD layer 4, an encapsulation layer 5, and a PCB module 6.
  • the reflective layer 2 is arranged on the substrate 1 at intervals, and a first opening is formed between two adjacent reflective layers 2; the reflective layer 2 is a metal reflective layer, specifically, wherein The constituent materials of the metal reflective layer include one or more of aluminum, silver and titanium.
  • the reflective layer 2 thus made can avoid light penetration, has a good light reflection effect, and is beneficial to realize light diffusion, thereby forming a surface light source.
  • the photoresist layer 3 is correspondingly disposed on the reflective layer 2, and a second opening is formed between two adjacent photoresist layers 3, and the second opening corresponds to the first
  • the opening is provided; the QD layer 4 is provided in the first opening between the reflective layers 2; thereby, it is beneficial to realize a thin white surface light source with a high color gamut.
  • the packaging layer 5 is disposed on the photoresist layer 3 and the second opening;
  • the PCB module 6 includes: a PCB 61 and an LED 62, and the PCB 61 is disposed on the package On layer 3, the LED 62 corresponding to the QD layer 4 is arranged on the surface of the PCB 61 facing the packaging layer 5.
  • the PCB 61 can be covered by the reflective layer 2.
  • the blue light emitted by the LED 62 is converted into white light after passing through the QD layer 4, the white light will not pass through the PCB after being reflected by the optical scattering material.
  • 61 ink and slits, but directly reflected by the reflective layer 2 to form a white surface light source, avoiding the PCB 61's ink reflectivity and chromatic aberration are inconsistent, resulting in blocky uneven brightness mosaic phenomenon.
  • the PCB module 6 includes two numbers.
  • the position of the splicing seam between two adjacent PCB modules 6 corresponds to the position of the reflective layer 2.
  • the splicing seams between the PCB modules 6 and the PCB 61 can be covered by the reflective layer 2.
  • the blue light emitted by the LED 62 passes through the QD layer 4, it is converted into white light, and the white light is reflected back by the optical scattering material and no longer passes through the PCB 61
  • the ink and the slit are directly reflected by the reflective layer 2 to form a white surface light source, which avoids the mosaic phenomenon of blocky uneven brightness caused by inconsistent ink reflectivity and color difference of the PCB 61.
  • this embodiment also provides a method for manufacturing a surface light source device, which includes: S1, providing a substrate 1, and forming a reflective layer on the substrate 1 through a sputtering or deposition process 2; S2, patterning the reflective layer 2 through a photomask and etching process to form a first opening between two adjacent reflective layers 2 to obtain reflective layers 2 arranged at intervals; S3, in The reflective layer 2 and the first opening are coated with photoresist, and the photoresist is exposed to UV light 7 from the back of the substrate 1, and a setting corresponding to the first opening is formed between two adjacent photoresist layers 3 S4, spray QD solution in the first openings between the reflective layers 2 to form a photoresist layer 3 correspondingly disposed on the reflective layer 2; after curing, obtain a QD layer 4 S5, apply glue on the QD layer 4 and the photoresist layer 3 to form an encapsulation layer 5; S6, at a position corresponding to the QD layer 4 on the surface of
  • the preparation method of the surface light source device further includes: S7, immersing the LED 62 in the encapsulation layer 5 for lighting, and detecting and adjusting the position of the LED 62 by the CCD camera 8.
  • the position of layer 4 corresponds.
  • Another embodiment of the present invention also provides a display device, which includes the surface light source device related to the present invention.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne un dispositif de source de lumière de zone et son procédé de fabrication, et un dispositif d'affichage. Le dispositif de source de lumière de zone comprend : un substrat, une couche de réflexion, une couche de résine photosensible, une couche de QD, une couche d'encapsulation et des modules PCB. Au moyen du couplage d'une DEL avec une ouverture de la couche de réflexion et de da couche de QD, une fente d'épissurage entre les modules PCB et les PCB est fournie correspondant à la position de la couche de réflexion, la lumière bleue émise par la DEL est convertie en lumière blanche après avoir traversé le QD, et la lumière blanche est réfléchie par un matériau de diffusion optique, puis ne passe pas à travers l'encre PCB et la fente, mais est directement réfléchie par la couche de réflexion ; ainsi, l'aspect mosaïque d'une luminosité irrégulière dans des blocs en raison d'une incohérence de la réflectivité de l'encre et de la différence de couleur des PCB peut être évité. En outre, la couche de QD est encapsulée dans la zone d'ouverture de la couche de réflexion, ce qui facilite la réalisation d'une source de lumière à zone blanche mince ayant une gamme de couleurs élevée.
PCT/CN2020/073521 2019-04-09 2020-01-21 Dispositif de source de lumière de zone et son procédé de fabrication, et dispositif d'affichage WO2020207102A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910281844.0 2019-04-09
CN201910281844.0A CN109976038B (zh) 2019-04-09 2019-04-09 一种面光源器件及其制备方法、显示装置

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WO2020207102A1 true WO2020207102A1 (fr) 2020-10-15

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WO (1) WO2020207102A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109976038B (zh) * 2019-04-09 2021-04-27 深圳市华星光电半导体显示技术有限公司 一种面光源器件及其制备方法、显示装置
CN111599909B (zh) * 2020-05-21 2023-07-11 东莞市中麒光电技术有限公司 一种led显示屏模块及其制备方法
CN114824025B (zh) * 2021-01-19 2023-07-11 东莞市中麒光电技术有限公司 微型led显示模块及其制作方法

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CN109001936A (zh) * 2017-06-06 2018-12-14 群创光电股份有限公司 光源模块及显示设备
CN208421467U (zh) * 2018-06-08 2019-01-22 深圳市瑞丰光电子股份有限公司 一种背光模组、显示装置及其电子设备
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