WO2023065302A1 - Appareil d'affichage, module de rétroéclairage et structure de positionnement de module de source de lumière associée - Google Patents

Appareil d'affichage, module de rétroéclairage et structure de positionnement de module de source de lumière associée Download PDF

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Publication number
WO2023065302A1
WO2023065302A1 PCT/CN2021/125696 CN2021125696W WO2023065302A1 WO 2023065302 A1 WO2023065302 A1 WO 2023065302A1 CN 2021125696 W CN2021125696 W CN 2021125696W WO 2023065302 A1 WO2023065302 A1 WO 2023065302A1
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WO
WIPO (PCT)
Prior art keywords
light source
positioning
source module
light
circuit board
Prior art date
Application number
PCT/CN2021/125696
Other languages
English (en)
Chinese (zh)
Inventor
张政德
林家叶
李育儒
侯佩棻
Original Assignee
瑞仪(广州)光电子器件有限公司
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 瑞仪(广州)光电子器件有限公司 filed Critical 瑞仪(广州)光电子器件有限公司
Priority to PCT/CN2021/125696 priority Critical patent/WO2023065302A1/fr
Publication of WO2023065302A1 publication Critical patent/WO2023065302A1/fr

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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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details

Definitions

  • the invention relates to a display technology, in particular to a backlight module and a light source module positioning structure in the display.
  • a liquid crystal display device generally includes a liquid crystal display panel and a backlight module.
  • the backlight module is used to provide a light source for the liquid crystal display panel.
  • the liquid crystal display panel can modulate the light emitted by the backlight module to realize image display.
  • the backlight module 10 includes: a light guide plate 11 , an optical film set 14 , a reflection sheet 15 , a light source module 12 and a frame 13 .
  • One side of the light guide plate 11 is the light-emitting surface, and the other side is the dot surface
  • the optical film group 14 is arranged on the light-emitting surface of the light guide plate 11
  • the reflector 15 is arranged on the dot surface side of the light guide plate 11
  • the frame 13 is carried and covered.
  • Components of the above-mentioned backlight module 10 includes a flexible circuit board 12a and a plurality of light sources 12b arranged on the flexible circuit board 12a.
  • the current light source module 12 needs to use double-sided adhesive tape 16 to fix the position when assembling.
  • Stickers 16 are used to stick it on the frame 13 , so that the plurality of light sources 12 b are located between the light incident side of the light guide plate 11 and the side wall 13 a of the frame 13 .
  • the current assembly of the light source module 12 of the backlight module 10 has at least the following problems in the positioning method of gluing and fixing.
  • the double-sided adhesive 16 needs to be pasted first during assembly, and then pressurized. Attaching and pressing the tool, such assembly can make the operation complicated, resulting in a long assembly time and difficult to complete the subsequent heavy maintenance.
  • the light source module 12 is pasted on the frame 13 via the double-sided adhesive tape 16, so that the plurality of light sources 12b are located between the light incident side of the light guide plate 11 and the side wall 13a of the frame 13, because the flexible circuit board 12a, there will be a large gap G between the light source 12b and the side wall 13a of the frame 13, and the gap G of the current light source module 12 is about 0.4mm, which makes the frame of the display device unable to be further narrowed.
  • the purpose of the present invention is to provide a light source module positioning structure of a backlight module, which does not require glue application, and achieves the effect of simplifying assembly or rework process and shortening working hours through structural positioning and position limiting.
  • the present invention provides a light source module positioning structure of a backlight module, comprising: a back plate, which includes a bottom plate and at least one side wall extending from the periphery of the bottom plate, the side wall is perpendicular to the bottom plate, the An accommodating space is formed between the side wall and the bottom plate, the side wall is provided with at least one guide portion, the guide portion extends obliquely downward toward the accommodating space, and the front end of the guide portion is provided with a positioning protrusion; the light source module , which includes a flexible circuit board and a plurality of light sources sequentially arranged on the flexible circuit board, at least one positioning notch is provided on the positioning side of the flexible circuit board, and the positioning notch corresponds to the positioning protrusion, and The positioning protrusion is engaged with the positioning notch.
  • the positioning protrusion extends straightly from the front end of the guide part, or the positioning protrusion extends downward from the front end of the guide part perpendicular to the bottom plate.
  • the front end surface of the guide portion abuts against the flexible circuit board.
  • the flexible circuit board is formed with a plurality of protrusions on the side extending along the long axis direction near the plurality of light sources, and the plurality of protrusions are arranged along the long axis direction, and the flexible circuit board
  • the positioning notch is arranged on the positioning side extending along the short axis direction
  • the back plate includes a fixed wall
  • the fixed wall is adjacent to the flexible circuit board and has a plurality of openings formed along the long axis direction, the protrusion Correspondingly accommodated in the opening.
  • a plurality of recesses are formed between the plurality of protrusions, and the depth of the plurality of recesses is equal to the thickness of the fixed wall.
  • the protrusion corresponds to the position of each light source on the flexible circuit board.
  • the fixing wall of the back panel is extended to form a bearing portion, and the bearing portion is parallel to the bottom plate and for the liquid crystal panel to be placed.
  • the guide part has a vertical part extending upward from the bottom plate and an inclined part connected to the vertical part, the inclined part faces the accommodating space, an angle is formed between the vertical part and the inclined part, and the The included angle is an acute angle.
  • the guide portion has an outer surface and an inner inclined surface, the inner inclined surface faces the accommodating space, an included angle is formed between the outer surface and the inner inclined surface, and the included angle is an acute angle.
  • the present invention provides a backlight module, comprising: a light guide plate, which has a light incident surface and a light exit surface connected to the light incident surface; and the positioning structure of the aforementioned light source module; the light guide plate is arranged on the On the bottom plate, and the light incident surface is adjacent to the light source module, the light emitted by a plurality of light sources enters the light guide plate through the light incident surface.
  • the present invention provides a display device, which includes: the aforementioned backlight module, and a liquid crystal panel disposed on the light emitting surface of the light guide plate.
  • the positioning structure of the light source module of the present invention uses the positioning protrusions on the back plate and the positioning notches on the side edges of the flexible circuit board to perform positioning and positioning During assembly, the flexible circuit board can be slid down to the positioning point for positioning and assembly, so that the positioning convex part of the backplane is engaged with the positioning notch of the flexible circuit board.
  • This assembly does not need glue for positioning, so it can Shorten assembly or rework man-hours, increase product yield, and reduce costs.
  • FIG. 1 is a schematic cross-sectional view of a conventional backlight module.
  • Fig. 2 is an exploded schematic diagram of the positioning structure of the light source module of the present invention.
  • Fig. 3 is a combined schematic diagram of the positioning structure of the light source module of the present invention.
  • Fig. 4 is a cross-section AA of Fig. 3 and a partially enlarged schematic diagram.
  • Fig. 5 is another A-A section and partially enlarged schematic diagram of Fig. 3 .
  • Fig. 6 is a partial schematic diagram of the guide part in the embodiment of the present invention.
  • Fig. 7 is another partial schematic diagram of the guide part in the embodiment of the present invention.
  • FIG. 8 is a partial schematic diagram of a display device in an embodiment of the present invention.
  • FIG. 2 , FIG. 3 and FIG. 8 are a schematic diagram of a positioning structure of a light source module, a schematic diagram of assembly, and a partial schematic diagram of a display device, respectively, according to an embodiment of the present invention.
  • the present invention discloses the positioning structure of the light source module 200 of the backlight module 300, which includes: a backplane 100 and a light source module 200; Vertical to the bottom plate 110, in this embodiment, the side walls 120 are arranged on both sides of the bottom plate 110, and an accommodating space 130 is formed between the side walls 120 and the bottom plate 110; the side wall 120 is provided with at least one guide portion 140, in this embodiment
  • the sidewalls 120 on both sides of the bottom plate 110 are respectively provided with a guide portion 140 , the guide portion 140 extends obliquely downward toward the accommodating space 130 , and a front end of the guide portion 140 is provided with a positioning protrusion 150 .
  • the light source module 200 includes a flexible circuit board 210 and a plurality of light sources 220 arranged in sequence on the flexible circuit board 210.
  • the positioning side 230 of the flexible circuit board 210 is provided with at least one positioning notch 231, and the positioning notch 231 corresponds to The aforementioned positioning protrusion 150 , and the positioning protrusion 150 is fitted and locked in the positioning notch 231 .
  • the flexible circuit board 210 can slide down along the slope of the guide part 140 through the design of the positioning notch 231 of the flexible circuit board 210 and the guide part 140 and the positioning protrusion 150 of the backplane 100 inclined downward and inward. Move to the positioning point, so that the positioning protrusion 150 engages with the positioning notch 231 of the flexible circuit board 210 .
  • This design is to insert the flexible circuit board 210 into the accommodating space 130 of the backplane 100 for positioning and limited assembly, so the entire light source module 200 does not need to be glued and positioned during the assembly process, thereby shortening the assembly or rework time. Increase product production yield, reduce costs, and increase the overall value of the backlight module 300.
  • the positioning protrusion 150 is formed by extending straight from the front end of the guide part 140 (as shown in FIG. (shown), so as to fit more tightly with the positioning notch 231 of the flexible printed circuit board 210 and fix it.
  • the guide portion 140 may include a vertical portion 142 extending upward from the bottom plate 110 and an inclined portion 143 connecting the vertical portion 142, an angle 144 is formed between the vertical portion 142 and the inclined portion 143, and the angle 144 is an acute angle, while
  • the inclined portion 143 faces the accommodating space 130 ; the entire guide portion 140 is integrally formed with the back plate 100 , and the front end of the inclined portion 143 is extended with the aforementioned positioning protrusion 150 (as shown in FIG. 6 ).
  • the guide part 140a can be an element assembled on the side wall 120 of the backplane 100.
  • the guide part 140a has an outer surface 142a and an inner inclined surface 143a.
  • the outer surface 142a and the inner inclined surface An included angle 144a is formed between the surfaces 143a, and the included angle 144a is an acute angle.
  • the inner inclined surface 143a faces the accommodating space 130, and the front end surface 141a of the inner inclined surface 143a is extended with the aforementioned positioning protrusion 150a.
  • the flexible circuit board 210 of the light source module 200 is formed with a plurality of protrusions 241 on the side 240 close to the light source 220 and extending along the long axis direction D1, and these protrusions 241 are formed along the long axis direction D1 Arranged, the convex portion 241 corresponds to the position of each light source 220 on the flexible circuit board 210 .
  • the positioning notch 231 of the flexible circuit board 210 is disposed on the positioning side 230 extending along the minor axis direction D2.
  • the backplane 100 includes a fixed wall 160, and the fixed wall 160 is adjacent to the flexible circuit board 210 and has a plurality of openings 161 formed along the long-axis direction D1.
  • the protrusions 241 of the flexible circuit board 210 can be correspondingly accommodated in the openings 161 of the fixed wall 160 , and a plurality of recesses 242 are formed between these protrusions 241 , and the depth of these recesses 242 is preferably the depth of the fixed wall 160 . thickness of.
  • the backlight module 300 at least includes a light guide plate 310 , an optical film set 320 and the aforementioned positioned light source module 200 .
  • the light guide plate 310 has a light incident surface 311 and a light exit surface 312 connected to the light incident surface 311 ;
  • the light surface 311 enters the light guide plate 310 and then exits from the light exit surface 312 (as shown in FIG. 8 ).
  • the fixed wall 160 of the backplane 100 is extended to form a bearing portion 170, which is parallel to the bottom plate 110, and can be used to place the liquid crystal panel 400.
  • the liquid crystal panel 400 is arranged on the light-emitting surface 312 of the light guide plate 310 and the optical film. Above the group 320 , the display device 500 (as shown in FIG. 8 ) is thus formed.
  • the liquid crystal panel 400 is carried and protected by the supporting part 170 , so that friction between the liquid crystal panel 400 and the optical film group 320 can be avoided.
  • the backlight module 300 includes a reflective sheet 330, which is arranged under the light guide plate 310 to increase the probability that the light emitted by these light sources 220 is reflected to the light exit surface 312, thereby ensuring the light guide plate 200. optical effect.
  • these light sources 210 can be located between the light incident surface 311 of the light guide plate 310 and the fixed wall 160 of the backplane 100.
  • the convex portion 241 and the concave portion 242 of the circuit board 210 are designed, and the convex portion 241 of the flexible circuit board 210 is correspondingly fitted into the opening 161 of the fixed wall 160, so that these light sources 220 on the flexible circuit board 210 can be connected to the fixed wall.
  • the gap g between 160 narrows.
  • the gap G of the aforementioned known technology can be reduced, for example, the gap g of the structure of the present invention can be reduced to about 0.1 mm, so that the frame of the display device 500 further narrowed.
  • the frontal edge design can be further narrowed.
  • these light sources 220 can also be designed to be closer to the direction of the fixed wall 160, thereby increasing the effective effect of the light guide plate 310 on the liquid crystal panel 400. In the corresponding range outside the operating area (Active Area, AA area), the light mixing area of these light sources 220 is increased to optimize the lighting taste.
  • the positioning structure of the light source module designed in the present invention utilizes the positioning convex portion 150 of the guide portion 140 disposed on the back plate 100 and the positioning notch 231 disposed on the flexible circuit board 210 for positioning and positioning, and can be positioned during assembly.
  • the flexible circuit board 210 slides down to the positioning point for fitting and positioning assembly.
  • This assembly process does not require glue positioning, thereby reducing the cost of glue application, shortening the assembly or rework hours, increasing product yield, and reducing costs. Effect.
  • the space between the light source 220 and the fixed wall 160 of the backplane 100 can be narrowed through the avoidance design of the backplane 100 and the flexible circuit board 210 , so that the frame of the display device 500 is further narrowed.
  • the corresponding range of the light guide plate 310 outside the effective operation area (Area AA) of the liquid crystal panel 400 can also be increased, and the light mixing area of the light source 220 can be increased to optimize the lighting quality.

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

Abstract

L'invention concerne un dispositif d'affichage (500), un module de rétroéclairage (300) et une structure de positionnement de module de source de lumière (200) associée. La structure de positionnement de module de source de lumière (200) comprend : une plaque arrière (100), une paroi latérale (120) de la plaque arrière (100) étant pourvue d'une partie de guidage (140), la partie de guidage (140) faisant face à un espace de réception (130) et s'étendant de manière inclinée vers le bas, et l'extrémité avant de la partie de guidage (140) étant pourvue d'une partie en saillie de positionnement (150) ; un module de source de lumière (200), une encoche de positionnement (231) étant disposée sur un côté de positionnement (230) d'une carte de circuit imprimé flexible (210) du module de source de lumière (200), l'encoche de positionnement (231) correspondant à la partie en saillie de positionnement (150), et la partie en saillie de positionnement (150) étant serrée dans l'encoche de positionnement (231) pour le positionnement et l'assemblage. Par conséquent, le module de source de lumière (200) peut être positionné sans collage, ce qui permet de réduire les heures-personne pour l'assemblage ou le travail lourd.
PCT/CN2021/125696 2021-10-22 2021-10-22 Appareil d'affichage, module de rétroéclairage et structure de positionnement de module de source de lumière associée WO2023065302A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/125696 WO2023065302A1 (fr) 2021-10-22 2021-10-22 Appareil d'affichage, module de rétroéclairage et structure de positionnement de module de source de lumière associée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/125696 WO2023065302A1 (fr) 2021-10-22 2021-10-22 Appareil d'affichage, module de rétroéclairage et structure de positionnement de module de source de lumière associée

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040169782A1 (en) * 2003-02-27 2004-09-02 Ching-Kun Lai Liquid crystal module
TW200821696A (en) * 2006-11-03 2008-05-16 Innolux Display Corp Backlight module and liquid crystal display device
CN101858514A (zh) * 2010-05-12 2010-10-13 友达光电股份有限公司 光源固定架及光源模组、背光模组以及液晶显示器
CN209514259U (zh) * 2019-04-01 2019-10-18 昆山龙腾光电有限公司 一种背光模组及显示装置
CN111221180A (zh) * 2020-01-20 2020-06-02 京东方科技集团股份有限公司 一种背光源及显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040169782A1 (en) * 2003-02-27 2004-09-02 Ching-Kun Lai Liquid crystal module
TW200821696A (en) * 2006-11-03 2008-05-16 Innolux Display Corp Backlight module and liquid crystal display device
CN101858514A (zh) * 2010-05-12 2010-10-13 友达光电股份有限公司 光源固定架及光源模组、背光模组以及液晶显示器
CN209514259U (zh) * 2019-04-01 2019-10-18 昆山龙腾光电有限公司 一种背光模组及显示装置
CN111221180A (zh) * 2020-01-20 2020-06-02 京东方科技集团股份有限公司 一种背光源及显示装置

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