WO2020155808A1 - 侧入式背光模组及液晶显示装置、背光板光学检验方法 - Google Patents

侧入式背光模组及液晶显示装置、背光板光学检验方法 Download PDF

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Publication number
WO2020155808A1
WO2020155808A1 PCT/CN2019/120395 CN2019120395W WO2020155808A1 WO 2020155808 A1 WO2020155808 A1 WO 2020155808A1 CN 2019120395 W CN2019120395 W CN 2019120395W WO 2020155808 A1 WO2020155808 A1 WO 2020155808A1
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WO
WIPO (PCT)
Prior art keywords
light source
guide plate
substrate
shaped
light
Prior art date
Application number
PCT/CN2019/120395
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English (en)
French (fr)
Chinese (zh)
Inventor
吕强强
孙树峰
王萍萍
邵晶
刘庆玉
王津
王永武
王德祥
Original Assignee
青岛理工大学
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Publication date
Application filed by 青岛理工大学 filed Critical 青岛理工大学
Priority to JP2021543199A priority Critical patent/JP7276785B2/ja
Priority to KR1020217026114A priority patent/KR102644340B1/ko
Publication of WO2020155808A1 publication Critical patent/WO2020155808A1/zh

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    • 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
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/0207—Details of measuring devices
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present disclosure belongs to the field of optical inspection of light guide plates, and in particular relates to a side-entry backlight module for inspecting light guide plate optics with adjustable light bar distance, a liquid crystal display device using the backlight module, and a backlight using the side-entry backlight module Optical inspection method of plate.
  • the rapid development of my country's liquid crystal display industry has driven the development of many enterprises that produce liquid crystal backlight module components.
  • the backlight module is divided into side-type backlight and direct-type backlight.
  • the present disclosure is directed to a backlight module with an edge-type backlight.
  • the main part of the backlight module of the edge type backlight is a light guide plate.
  • the light guide plate needs to be optically inspected after ink printing or laser dotting.
  • Optical inspection usually involves placing the light guide plate after ink printing or laser dotting on a simple backlight module and using BM-7 for optical inspection.
  • the positioning slot of the light guide plate and the positioning post of the backlight module are usually clearance fit (for ease of assembly, it is impossible to design an interference fit), which leads to the placement of the light guide plate on the backlight module When it is installed, the light incident side cannot be accurately close to the light bar of the backlight module, and there will be a certain distance between them.
  • the positioning column will become loose, which will also cause the light incident side to not accurately approach the light bar.
  • the inventor found through a large number of simulation experiments and actual measurements that the distance between the light bar and the light entrance side of the light guide plate is very important. A larger distance between the light bar and the light guide plate will reduce the optical detection value of the light guide plate by 300-500nit ( BM-7 optical unit). This is fatal to the light guide plate. It is very likely that a product that was originally qualified will be unqualified due to the distance of the light bar. The price of a light guide plate ranges from 50-1500 yuan, which is a great loss.
  • experienced staff will deliberately push the light guide plate toward the light bar when inspecting the light guide plate to reduce the distance between the light bar and the light entrance side of the light guide plate. Although this can increase the optical detection value of the light guide plate, it cannot Avoid touching the moving light guide plate, causing stains and scratches on the light guide plate, especially the light guide plate of 86 inches (1.9m*1.2m) or larger, which is difficult to move at all. The above-mentioned problems will cause losses to the enterprise.
  • the present disclosure provides an edge-lit backlight module for inspecting light guide plate optics with adjustable light bar distance, and a liquid crystal display device using the backlight module and an edge-lit backlight module Optical inspection method of the backlight plate.
  • the backlight module includes a backlight plate main body, the backlight plate main body includes a first substrate for carrying a light guide plate to be tested and a second substrate detachably connected to the first substrate, the A light source moving module is provided on the second substrate, and a light source is installed on the light source moving module.
  • the light source moving module is used to drive the light source to move in a direction perpendicular to it, thereby adjusting the distance between the light source and the light guide plate, avoiding touching the moving light guide plate, causing no stains and scratches on the light guide plate, and reducing loss.
  • the cost is saved, and the main body of the backlight board is not an integral structure, which is convenient for transportation.
  • the light source moving module includes a light source support frame, two symmetrically arranged L-shaped levers for driving the light source support frame to move up and down, and a rotating device for driving the L-shaped lever to perform fan-shaped movement.
  • the light source support frame includes a transverse support rod and two vertical guide rods perpendicular to the transverse support rod, the light source is mounted on the transverse support rod, and two symmetrical support rods are provided below the transverse support rod to communicate with L
  • the U-shaped guide pieces matched with the shaped shift levers, and two side walls of each guide piece are respectively provided with long through holes along the transverse direction.
  • a U-shaped stopper for restricting the movement position of the vertical guide rod is provided at a position on the second substrate corresponding to the vertical guide rod, and the vertical guide rod is located between the U-shaped stopper and the second substrate. Between the formation of the cavity.
  • the present disclosure uses the light source moving module to drive the light source to move in a direction perpendicular to it, thereby adjusting the light source and the light guide.
  • the distance from the light entrance side of the light guide plate greatly reduces the probability of misjudgment of whether the light guide plate is qualified or not.
  • a rotating shaft is provided at a position corresponding to the L-shaped shift lever on the second substrate, and the connection between the horizontal section and the vertical section of the L-shaped shift lever is provided on the rotating shaft on the second substrate.
  • one end of the horizontal section of the L-shaped shift lever is provided with a protrusion that cooperates with the U-shaped guide, and the horizontal section of the L-shaped shift lever is located in the through hole of the U-shaped guide.
  • the protrusions are matched with the U-shaped guides.
  • the L-shaped lever makes a fan-shaped movement
  • the light source support frame is raised or lowered through the cooperation of the protrusions and the guides to achieve the adjustment of the distance between the light source and the light guide plate. purpose.
  • the knob is installed on the back side of the second substrate and is connected to the turntable through a shaft.
  • the rotation of the knob on the back of the second substrate is used to drive the turntable to rotate.
  • the turntable drives the L-shaped lever through the connecting rod to rotate in a fan shape, so as to facilitate the lifting or lowering of the light source support frame, and the light source support frame drives the light source to move , To achieve the purpose of adjusting the distance between the light source and the light guide plate.
  • the light-shielding module includes a cover plate arranged on the outer side of the light source moving module and a light-shielding plate arranged on the cover plate. Both ends of the cover plate are fixedly connected to the second substrate. The two sides of the board are clamped and fixed on the cover by edge strips.
  • a liquid crystal display device includes the above-mentioned edge-type backlight module and a light guide plate, the light guide plate is fixed on the body of the backlight plate and arranged opposite to the light source.
  • An optical inspection method for a light guide plate which is implemented based on the above-mentioned edge-type backlight module, and includes the following steps:
  • the turntable drives the two L-shaped levers to perform fan-shaped movement around the shaft through two connecting rods;
  • the protrusions of the two L-shaped levers swing in a fan shape, and simultaneously lift the light source support frame;
  • the light source support frame drives the light source to move upward, making the light source close to the light entrance side of the light guide plate;
  • the light guide plate is optically inspected with a backlight module optical measuring instrument to obtain the optical detection value of the light guide plate.
  • the present disclosure adopts the light source moving module to drive the light source to move in a direction perpendicular to it, thereby adjusting the distance between the light source and the light guide plate, avoiding touching the moving light guide plate, causing no stains and scratches on the light guide plate, and reducing loss. Cost savings;
  • the main body of the present disclosure is not an integral structure, but is composed of two detachably connected base plates, which is convenient for transportation; and the two base plates are aluminum base plates, which is convenient for heat dissipation and does not cause bending and deformation of the plates;
  • the present disclosure uses the rotation of the knob on the back of the second substrate to drive the turntable to rotate.
  • the turntable drives the L-shaped lever through the connecting rod to make a fan-shaped rotation, so as to facilitate the lifting or lowering of the light source support frame, and the light source support frame drives the light source to move ,
  • To achieve the purpose of adjusting the distance between the light source and the light guide plate which can greatly reduce the probability of misjudgment, dirt, and scratches on the qualified light guide plate, and reduce the cost.
  • FIG. 1 is a schematic diagram of the overall structure of the side-lit backlight module of this embodiment
  • FIG. 2 is a schematic diagram of the structure without a cover of the side-lit backlight module of this embodiment
  • Fig. 3 is a partial enlarged schematic diagram of a light source and a light source support frame of this embodiment
  • Fig. 5 is a structural schematic diagram 1 of a light source moving module of this embodiment
  • Fig. 6 is a second structural diagram of a light source moving module of the first embodiment
  • FIG. 7 is a partial enlarged schematic diagram of a shading module of this embodiment.
  • Fig. 8 is a schematic structural diagram of a knob of this embodiment.
  • the first embodiment provides a side-lit backlight module.
  • the side-lit backlight module includes a backlight plate main body, a light source, a light source moving module and a light shielding module.
  • the backlight main body includes a first substrate 1 and a second substrate 2 for fixing and carrying the light guide plate to be inspected.
  • the first substrate 1 and the second substrate 2 are detachably connected to form a backlight.
  • Other components of the module such as the light source, the light source moving module and the accommodating space of the shading module; the first substrate 1 and the second substrate 2 that are detachably connected are not an integral structure, and can be placed separately during transportation for convenient transportation.
  • the light source moving module is arranged on the front side of the second substrate 2.
  • the light source moving module includes a light source support frame 5, a turntable 6, a connecting rod 7, an L-shaped lever 8, and a rotating shaft 10. And the knob 14, the light source 4 is arranged on the light source support frame 5.
  • the light source support frame 5 includes a horizontal support rod 51 and two vertical guide rods 52 that are vertical and horizontal support rods.
  • the light source 4 is arranged on the horizontal support rod 51 for carrying the light source 4;
  • the top sides of the two guides 53 are fixedly connected to the bottom of the transverse support rod 51, and the two guides 53 are located at Between the two vertical support rods 52, the two side walls of each guide 53 are respectively provided with elongated through holes 54 in the transverse direction, which are used to cooperate with the protrusions of the L-shaped lever to transmit movement;
  • An L-shaped lever 8 is respectively provided in each connecting piece 53.
  • a rotating shaft 10 is provided at a position corresponding to the L-shaped shift lever 8 on the second substrate, and the connection between the horizontal section 81 and the vertical section 82 of the L-shaped shift lever 8 is set in the second On the rotating shaft 10 on the base plate, the L-shaped shift lever 8 can perform fan-shaped movement around the rotating shaft 10.
  • the horizontal section 81 of the L-shaped shift lever 8 is located in the U-shaped connector 53, and the horizontal section of the L-shaped shift lever 8
  • the end of 81 away from the vertical section is symmetrically provided with two protrusions 83.
  • the protrusions 83 are located in the through holes 54 on the two side walls of the U-shaped connecting member 53 and can slide in the passage 54 to act as an L-shaped dial.
  • the protrusion 83 can raise or lower the light source support frame 5, so that the light source 4 can move in a direction perpendicular to the light source support frame 5, and adjust the distance between the light source and the light entrance side of the light guide plate assembly. Greatly reduce the probability of misjudgment, dirt, and scratches on whether the light guide plate is qualified or not, and reduce costs.
  • the shading module includes a cover 13 and a shading plate 11.
  • the cover 13 is arranged on the outside of the light source moving module and is fixedly installed on the second substrate 2 to prevent the light source from moving the module It is removed from the second substrate 2 to prevent the light from overflowing at the light source and to prevent the detection of the light guide plate. It is also used to carry the light shielding plate 11; the light shielding plate 11 is arranged on the cover plate 13, and the light shielding plate 11 The two sides of the light shield are clamped and fixed on the cover plate 13 by the side strips 13, so that the shading plate is fixed on the cover plate and is not easy to fall off and prevents the light emitted by the light source from overflowing.
  • the knob 14 is installed on the back side of the second base plate 2.
  • the knob 14 is connected to the turntable through a shaft.
  • the turntable 6 rotates, and the connecting rod 7 drives the L-shaped
  • the shift lever performs fan-shaped movement around the rotating shaft 10, and the protrusion 83 of the L-shaped shift lever lifts or lowers the light source support frame 5, so that the light source 4 moves in a direction perpendicular to the light source support frame 5, and adjusts the light source and the first substrate and the second substrate
  • the distance of the light source can be close to the light incident side of the light guide plate.
  • the light guide plate to be inspected is fixedly installed on the first substrate through a plurality of positioning pins 3, and the knob 14 is rotated clockwise to drive the turntable 6 to rotate, which is driven by the connecting rod 7.
  • the L-shaped lever moves in a fan shape around the shaft 10, and the protrusion 83 of the L-shaped lever lifts the light source support frame 5 to move the light source 4 in a direction perpendicular to the light source support frame 5, making the light source close to the light entrance side of the light guide plate .
  • the side-entry backlight module proposed in this embodiment drives the turntable 6 to rotate by turning the knob 14 on the back side of the second substrate.
  • the turntable 6 and the L-shaped lever 8 are connected by the connecting rod 7.
  • the L-shaped The shift lever 8 also performs a fan-shaped motion accordingly, and the protrusions on the L-shaped shift lever 8 swing in a fan-shaped manner, thereby driving the upward or downward movement of the light source support frame 5, and finally the light source 4 moves upward or downward.
  • This embodiment The rotary movement of the knob is transformed into the linear movement of the light source, and the light source is adjusted to be close to the light incident side of the light guide plate.
  • the above-mentioned first substrate 1 adopts an aluminum substrate for supporting and fixing the light guide plate to be inspected
  • the above-mentioned second substrate 2 also adopts an aluminum substrate for carrying the light guide plate and can dissipate heat well.
  • a large amount of heat is generated during light emission, and if it is not dissipated, it will cause bending and deformation of the plate. Therefore, in this embodiment, the first substrate 1 and the second substrate are respectively aluminum substrates, which can dissipate heat well.
  • first substrate 1 and second substrate 2 can be connected together by bolts.
  • the bolts can be removed to disassemble the first substrate 1 and the second substrate 2 for convenient transportation.
  • the light source 4 adopts an LED light bar as the light source of the entire backlight module.
  • the light bar is fixedly arranged on the light source support frame 5.
  • the protrusion 83 of the L-shaped lever 8 can lift or lower the light source support frame 5, so that the light bar moves in a direction perpendicular to the light source support frame 5, and adjusts the distance between the light bar and the light entrance side of the light guide plate assembly.
  • the position on the second substrate proposed in this embodiment corresponding to the vertical guide rod 52 of the light source support frame 5 is provided with a U-shaped stopper 9 for restricting the moving position of the vertical guide rod 52 for limiting The position where the light source support frame 5 moves downward.
  • the U-shaped limiting member 9 is mounted on the second aluminum substrate 3 by screws, a cavity is formed between the U-shaped limiting member 9 and the second aluminum substrate 3, and the light source support frame 5
  • the vertical guide rod 52 is located in the cavity, and the vertical guide rod 52 can move along the direction specified by the U-shaped stop 9.
  • the liquid crystal display device includes a light guide plate and the above-mentioned side-lit backlight module.
  • the light guide plate is fixed on the first substrate 1 and arranged opposite to the light source 4.
  • edge-lit backlight module of this embodiment please refer to the related description of the previous embodiment, and will not be repeated here.
  • the light guide plate is fixedly mounted on the first substrate by a plurality of positioning pins 3, and this embodiment uses a plurality of positioning pins 3 to fix the light guide plate on the first substrate, and the positioning pins 1 It cooperates with the slot of the light guide plate to ensure that the light guide plate will not shake on the first substrate.
  • This embodiment provides an optical inspection method for a light guide plate, which is implemented based on the above edge-lit backlight module, and the method includes the following steps:
  • the turntable drives the two L-shaped levers 8 to perform fan-shaped movement around the rotating shaft 10 through the two connecting rods 7;
  • the light source support frame 5 drives the light source 4 to move upward in a direction perpendicular to the light source support frame 5, so that the light source is close to the light incident side of the light guide plate;
  • the optical inspection of the light guide plate is implemented by adopting the following scheme:
  • the composite film which mainly includes some optical film such as prism film and diffusion film;
  • the optical inspection method of the light guide plate proposed in this embodiment drives the turntable 6 to rotate by rotating the knob 14 on the back side of the second substrate.
  • the turntable 6 and the L-shaped lever 8 are connected by the connecting rod 7.
  • the L-shaped dial The rod 8 also performs a fan-shaped movement, and the protrusion on the L-shaped lever 8 swings in a fan-shaped manner, thereby driving the upward or downward movement on the light source support frame 5, and finally the light source 4 moves upward or downward.
  • This embodiment passes The rotary motion of the knob is transformed into the linear motion of the light source.
  • the light source is adjusted close to the light entrance side of the light guide plate, and then the backlight module optical measurement system BM-7 performs optical inspection on the light guide plate to provide the optical detection value accuracy of the light guide plate.
  • the backlight module of the present disclosure can be suitable for the purpose of detecting whether the optical index of the light guide plate is qualified when the light guide plate manufacturer is producing the laser dotted light guide plate or the ink printed light guide plate.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Analytical Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Liquid Crystal (AREA)
PCT/CN2019/120395 2019-01-28 2019-11-22 侧入式背光模组及液晶显示装置、背光板光学检验方法 WO2020155808A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021543199A JP7276785B2 (ja) 2019-01-28 2019-11-22 エッジ型バックライトモジュール及び液晶表示装置、バックライトの光学検査方法
KR1020217026114A KR102644340B1 (ko) 2019-01-28 2019-11-22 엣지형 백라이트 모듈 및 액정 디스플레이장치, 백라이트 플레이트 광학 검증방법

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CN201910081106.1A CN109683395A (zh) 2019-01-28 2019-01-28 侧入式背光模组及液晶显示装置、背光板光学检验方法
CN201910081106.1 2019-01-28

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KR (1) KR102644340B1 (ja)
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CN113820880A (zh) * 2021-08-24 2021-12-21 郴州海润电子科技有限公司 便于拆卸和调节的lcd液晶显示器
CN115032835A (zh) * 2022-06-27 2022-09-09 四川兆纪光电科技有限公司 背光基板的组装方法及设备
WO2023207858A1 (zh) * 2022-04-24 2023-11-02 京东方科技集团股份有限公司 曲面显示装置

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CN113820880B (zh) * 2021-08-24 2024-03-15 郴州海润电子科技有限公司 便于拆卸和调节的lcd液晶显示器
WO2023207858A1 (zh) * 2022-04-24 2023-11-02 京东方科技集团股份有限公司 曲面显示装置
CN115032835A (zh) * 2022-06-27 2022-09-09 四川兆纪光电科技有限公司 背光基板的组装方法及设备
CN115032835B (zh) * 2022-06-27 2023-10-27 四川兆纪光电科技有限公司 背光基板的组装方法及设备

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