CN106873240B - Backlight assembly and liquid crystal display module - Google Patents

Backlight assembly and liquid crystal display module Download PDF

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Publication number
CN106873240B
CN106873240B CN201710067953.3A CN201710067953A CN106873240B CN 106873240 B CN106873240 B CN 106873240B CN 201710067953 A CN201710067953 A CN 201710067953A CN 106873240 B CN106873240 B CN 106873240B
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China
Prior art keywords
guide plate
light guide
light
optical
backlight assembly
Prior art date
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Active
Application number
CN201710067953.3A
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Chinese (zh)
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CN106873240A (en
Inventor
阙成文
丘永元
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to CN201710067953.3A priority Critical patent/CN106873240B/en
Priority to PCT/CN2017/073676 priority patent/WO2018145325A1/en
Publication of CN106873240A publication Critical patent/CN106873240A/en
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133605Direct backlight including specially adapted reflectors

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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

The invention provides a backlight assembly, which comprises optical modules arranged on a back plate, wherein each optical module comprises a light bar, a light guide plate and a reflector plate arranged at the lower end of the light guide plate, at least two groups of optical modules are arranged, each group of optical modules also comprises a first base for bearing the light guide plate of an adjacent group of optical modules and the reflector plate, the light bar is arranged on one surface of the first base, which is opposite to the side edge of the light guide plate, an inclined part which extends obliquely towards the direction of the light guide plate is arranged on the first base, the upper end surface of the inclined part is an inclined surface, a reflecting layer for reflecting light rays emitted by the light bars of the adjacent group of optical modules is arranged on the inclined surface, an optical film group is covered on each optical module, and the. The invention also provides a liquid crystal display panel, which comprises a display panel and the backlight assembly. Compared with the prior art, the partition control of the backlight source is realized; the thickness is reduced, and the problem of darker brightness at the splicing part is also solved.

Description

Backlight assembly and liquid crystal display module
Technical Field
The invention relates to a liquid crystal panel module technology, in particular to a backlight assembly and a liquid crystal display module.
Background
The backlight of the common liquid crystal display module mainly comprises a side light-in type backlight module and a direct type backlight module, wherein the side light-in type backlight module has advantages in thickness and is beneficial to thinning design of products, but the brightness of one side far away from a light source is lower than that of one side close to the light source, so that the brightness distribution is uneven; the direct-type backlight is more beneficial to partition control of display and better display picture, but how to achieve the thickness advantage of the conventional lateral-type backlight assembly while obtaining better display picture becomes a problem to be solved urgently at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a backlight assembly and a liquid crystal display module, so that the lateral backlight realizes multi-partition control, and the problems of uneven thickness and brightness distribution are reduced.
The invention provides a backlight assembly, which comprises optical modules arranged on a back plate, wherein each optical module comprises a light bar, a light guide plate and a reflector plate arranged at the lower end of the light guide plate, at least two groups of optical modules are arranged, each group of optical modules also comprises a first base for bearing the light guide plate of an adjacent group of optical modules and the reflector plate, the light bar is arranged on one surface of the first base, which is opposite to the side edge of the light guide plate, an inclined part which extends obliquely towards the direction of the light guide plate is arranged on the first base, the upper end surface of the inclined part is an inclined surface, a reflecting layer for reflecting light rays emitted by the light bars of the adjacent group of optical modules is arranged on the inclined surface, an optical film group is covered on each optical module, and the.
Furthermore, the inclined part is provided with an extending part which horizontally extends towards the upper end surface of the light guide plate, the extending part forms a pressing part, and the pressing part is pressed on one side, opposite to the light bar, of the light guide plate.
Further, the inclined part is gradually increased in height from the first base towards the light guide plate.
Further, first base is the L font, including horizontal portion and the vertical portion that sets up perpendicularly with horizontal portion, forms the first portion of bearing that the lamp strip one side was kept away from to light guide plate and reflector plate that bear adjacent a set of optical module between horizontal portion and the vertical portion, and the one side relative with the lamp strip forms the second portion of bearing that is used for fixed lamp strip in vertical portion, and the rake is located on the vertical portion.
Furthermore, a second base is arranged at the lower end of one side, opposite to the light bar, of the light guide plate of each group of optical modules.
Furthermore, a groove is formed in the side edge of the vertical portion opposite to the side edge of the side edge, away from the light bar, of the light guide plate of the adjacent group of optical modules, the groove is parallel to the light bar, and a filler is arranged in the groove.
Further, the optical film group comprises a light-transmitting plate arranged above the optical module and at least one layer of optical film attached to the light-transmitting plate.
Further, the light-transmitting plate is a diffusion plate.
The invention also provides a liquid crystal display panel, which comprises a display panel and the backlight assembly.
Compared with the prior art, the invention realizes the partition control of the backlight source by arranging at least two groups of side-in optical modules, and can obtain better display pictures; due to the adoption of the side-in type backlight structure, the thickness of the backlight assembly is reduced, and the reflecting layer is arranged on each group of optical modules, so that the brightness compensation is carried out on the splicing position of the two groups of optical modules, the problem of uneven brightness distribution is solved, and the problem of darker brightness at the splicing position is also solved.
Drawings
Fig. 1 is a schematic structural view of a backlight assembly of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the backlight assembly of the present invention includes at least two sets of optical modules 2 disposed on a back plate 1, each set of optical modules 2 includes a light bar 3, a light guide plate 4, a reflector plate 5 disposed at a lower end of the light guide plate 4, and a first base 6 for supporting the light guide plate 4 and the reflector plate 5 of an adjacent set of optical modules 2, the light bar 3 is disposed on a side of the first base 6 opposite to a side edge of the light guide plate 4, an inclined portion 61 extending obliquely toward the light guide plate 4 is disposed on the first base 6, an upper end surface of the inclined portion 61 is an inclined surface, a reflective layer 62 for reflecting light emitted from the light bar 3 of the adjacent set of optical modules 2 is disposed on the inclined surface, the reflective layer 62 is made of a material capable of reflecting a light source, and is not; the invention adopts the modularized optical module 2, so that the side-in type backlight assembly can have the partition control function of the direct type backlight assembly, the liquid crystal display module adopting the invention can obtain the same display picture as the liquid crystal display module adopting the direct type backlight assembly, and the thickness problem of the direct type backlight assembly is solved.
The optical module 2 is covered with the optical diaphragm group 7, the optical diaphragm group 7 comprises a light-transmitting plate 71 arranged above the optical module 2 and at least one layer of optical diaphragm 72 attached to the light-transmitting plate 7, the light-transmitting plate 71 is a diffusion plate, the reflection surface of the reflection layer 62 faces the optical diaphragm group 7, and the diffusion plate 71 is arranged between the lower end of the optical diaphragm group 7 and the optical module 2.
Specifically, in order to solve the problem of fixing the light guide plate 4 of the optical module 2, an extending portion extending horizontally toward the upper end surface of the light guide plate 4 is provided on the inclined portion 61, the extending portion forms a press-fit portion 63, the press-fit portion 63 presses on the side of the light guide plate 4 opposite to the light bar 3, and the press-fit portion 63 can also enable the light guide plate 4 and the light bar 3 to obtain a stable and accurate positional relationship, thereby obtaining a good optical coupling relationship.
In the present invention, the inclined portion 61 is formed such that the height thereof increases in the direction of the light guide plate 4 from the first chassis 6.
Specifically, the first chassis 6 of the present invention may be implemented by adopting a structure in which the first chassis 6 is L-shaped, and includes a transverse portion 64 and a vertical portion 65 disposed perpendicular to the transverse portion 64, a first bearing portion 66 for bearing the light guide plate 4 of the adjacent group of optical modules 2 and one side of the reflective sheet 5 away from the light bar 3 is formed between the transverse portion 64 and the vertical portion 65, a second bearing portion 67 for fixing the light bar 3 is formed on a surface of the vertical portion 65 opposite to the light bar 3, the light bar 3 is fixed to the second bearing portion 67 by adhesion, and the inclined portion 61 is disposed on the vertical portion 65.
Still can be equipped with second base 8 at the one side lower extreme that light guide plate 3 of every group optical module 2 is relative with lamp strip 2 to solve the balanced problem of light guide plate 4, but in order to realize better modularization problem, can extend to lamp strip 2 department with the horizontal portion 64 of first base 6, thereby remove the problem that still need assemble second base 8 from.
Be equipped with recess 68 on the one side that vertical portion 65 and the one side opposite that keeps away from lamp strip 3 of light guide plate 4 of adjacent a set of optical module 2, recess 68 is parallel with lamp strip 3, is equipped with filler 69 in recess 68 to prevent that light guide plate 4 and first base 6 are the problem of hard contact.
For the sake of understanding, it is assumed that the optical module 2 of the present invention is provided with two sets, namely, a first optical module and a second optical module; during assembly, the first base 6 and the second base 8 of the first optical module and the first base 6 of the second optical module are firstly placed on the back plate 1, the light bar 3 of the first optical module is fixed on the second bearing part 67, then the reflective sheet 5 and the light guide plate 4 of the first optical module are sequentially placed, the side edge of the light guide plate 4 close to the light bar 3 is inserted into the pressing part 63 of the first optical module, so that the side edge of the light guide plate 4 close to the light bar 3 is opposite to the light beads of the light bar 3, the reflection sheet 5 and the light guide plate 4 of the first optical module are limited and fixed through the pressing part 63 of the first optical module, at this time, one side of the light guide plate 4 and the emission sheet 5 of the first optical module, which is far away from the light bar 3, is placed on the first bearing part 66 of the first base 6 in the second optical module, and the assembly is continued in this way, so that the installation of all the optical modules is completed.
When the outgoing optical fibers of the light bar 3 of the first optical module are refracted and reflected by the reflector 5 and the light guide plate 4, a part of the light is transmitted to the reflective layer 62 in the second optical module, and the reflective layer 62 reflects the light, so that the splicing position of two adjacent optical modules is illuminated.
As shown in fig. 1, the present invention further discloses a liquid crystal display module, which includes a display panel 9 and the backlight assembly.
The invention can adjust the thickness of the light guide plate 4, the mesh point distribution of the light guide plate 4, the spacing distance of the splicing position and the height of the optical film group from the light guide plate 4 according to the actual situation, and the brightness uniformity effect can reach more than 88 percent through the optimized design, thereby meeting the design requirements of the television.
While the invention has been shown and described with reference to certain embodiments, those skilled in the art will understand that: various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a backlight assembly, is including locating optical module (2) on backplate (1), optical module (2) are including lamp strip (3), light guide plate (4) and locate reflector plate (5) of light guide plate (4) lower extreme, its characterized in that: the optical modules (2) are provided with at least two groups, each group of optical modules (2) also comprises a first base (6) for bearing the light guide plate (4) and the reflector plate (5) of the adjacent group of optical modules (2), the lamp strip (3) is arranged on one surface of the first base (6) opposite to the side edge of the light guide plate (4), an inclined part (61) extending obliquely towards the direction of the light guide plate (4) is arranged on the first base (6), the upper end surface of the inclined part (61) is an inclined surface, the inclined plane is provided with a reflecting layer (62) for reflecting the light rays emitted by the lamp strips (3) of the adjacent group of optical modules (2), the optical module (2) is covered with an optical film group (7), the reflecting surface of the reflecting layer (62) faces the optical film group (7), the inclined part (61) is gradually increased in height from the first base (6) to the light guide plate (4).
2. The backlight assembly of claim 1, wherein: the inclined part (61) is provided with an extending part which horizontally extends towards the upper end surface of the light guide plate (4), the extending part forms a pressing part (63), and the pressing part (63) presses on one side of the light guide plate (4) opposite to the light bar (3).
3. The backlight assembly according to claim 1 or 2, wherein: first base (6) are the L font, including horizontal portion (64) and vertical portion (65) with horizontal portion (64) perpendicular setting, the first portion (66) that bears lamp strip (3) one side is kept away from in light guide plate (4) and reflector plate (5) that horizontal portion (64) and vertical portion (65) between form and bear the weight of adjacent a set of optical module (2), the one side relative with lamp strip (3) forms second portion (67) that bears that is used for fixed lamp strip (3) on vertical portion (65), slope (61) are located on vertical portion (65).
4. The backlight assembly of claim 3, wherein: the lower end of one side, opposite to the light bar (2), of the light guide plate (3) of each group of optical modules (2) is provided with a second base (8).
5. The backlight assembly of claim 4, wherein: the vertical portion (65) and the side face, opposite to the side edge, of one side, away from the light bar (3), of the light guide plate (4) of the adjacent group of optical modules (2) are provided with grooves (68), the grooves (68) are parallel to the light bar (3), and fillers (69) are arranged in the grooves (68).
6. The backlight assembly of claim 1, wherein: the optical diaphragm group (7) comprises a light-transmitting plate (71) arranged above the optical module (2) and at least one layer of optical diaphragm (72) attached to the light-transmitting plate (71).
7. The backlight assembly of claim 6, wherein: the light-transmitting plate (71) is a diffusion plate.
8. A liquid crystal display panel comprising a display panel (9), characterized in that: further comprising the backlight assembly of any one of claims 1-7.
CN201710067953.3A 2017-02-07 2017-02-07 Backlight assembly and liquid crystal display module Active CN106873240B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201710067953.3A CN106873240B (en) 2017-02-07 2017-02-07 Backlight assembly and liquid crystal display module
PCT/CN2017/073676 WO2018145325A1 (en) 2017-02-07 2017-02-15 Backlight assembly and liquid crystal display module

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Application Number Priority Date Filing Date Title
CN201710067953.3A CN106873240B (en) 2017-02-07 2017-02-07 Backlight assembly and liquid crystal display module

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CN106873240B true CN106873240B (en) 2020-05-19

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WO (1) WO2018145325A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107145034B (en) * 2017-06-23 2020-11-27 武汉华星光电技术有限公司 Half-tone mask plate
CN113990211B (en) * 2021-11-15 2022-11-01 Tcl华星光电技术有限公司 Display screen and display device
CN115373065A (en) * 2022-08-24 2022-11-22 业成科技(成都)有限公司 Side light-entering type backlight module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102081187A (en) * 2010-11-30 2011-06-01 深圳市华星光电技术有限公司 Spliced type light guide plate structure and backlight module

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4262368B2 (en) * 1999-09-22 2009-05-13 株式会社日立製作所 LIGHTING DEVICE AND DISPLAY DEVICE USING THE SAME
TWI331694B (en) * 2005-10-20 2010-10-11 Ind Tech Res Inst Back-lighted structure
US20110141396A1 (en) * 2008-09-30 2011-06-16 Sharp Kabushiki Kaisha Illumination device and liquid crystal display device
KR20110014869A (en) * 2009-08-06 2011-02-14 엘지전자 주식회사 Backlight unit and display apparatus thereof
KR101684478B1 (en) * 2010-01-20 2016-12-09 삼성디스플레이 주식회사 Backlight assembly having a plurality of light guide plates
CN202216081U (en) * 2011-07-29 2012-05-09 北京京东方光电科技有限公司 Back light source capable of adjusting light locally and liquid crystal display module
CN104834049A (en) * 2015-05-15 2015-08-12 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102081187A (en) * 2010-11-30 2011-06-01 深圳市华星光电技术有限公司 Spliced type light guide plate structure and backlight module

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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province

Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd.

Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province

Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd.

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