CN110646975A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN110646975A CN110646975A CN201910884526.3A CN201910884526A CN110646975A CN 110646975 A CN110646975 A CN 110646975A CN 201910884526 A CN201910884526 A CN 201910884526A CN 110646975 A CN110646975 A CN 110646975A
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- China
- Prior art keywords
- backlight module
- guide plate
- light guide
- led
- light source
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 14
- 239000012788 optical film Substances 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 239000010408 film Substances 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module and a liquid crystal display device, comprising an LED light source; the light guide plate is arranged on one side of the LED light source; and an optical film set. The optical film group comprises a diffusion film arranged above the light guide plate, a prism sheet arranged above the diffusion film, and a reflecting sheet arranged below the light guide plate. The LED light source comprises an LED chip main body and at least one retaining wall. The LED chip and the at least one retaining wall are integrally connected to form an accommodating space with an opening, the light guide plate is clamped in the accommodating space, and light emitted by the LED chip main body is transmitted to the light guide plate through the opening. The invention realizes the stable connection between the LED light source and the light guide plate, enhances the connection strength between the LED light source and a Flexible Printed Circuit (FPC), greatly reduces light leakage and realizes the ultra-thinning of the backlight module.
Description
Technical Field
The invention relates to the field of liquid crystal displays, in particular to a backlight module and a liquid crystal display device.
Background
In a Liquid crystal display (Liquid crystal display), a backlight module (backlight) is generally used to provide a uniform and high-luminance light source for a Liquid crystal panel (Cell). The backlight module can be divided into an edge-type backlight module and a direct-type backlight module according to the difference of the light source distribution positions in the backlight module, wherein the light source in the edge-type backlight module is positioned on the side surface of the display panel, and the light source in the direct-type backlight module is positioned at the bottom of the display panel. The existing side-in backlight module is more suitable for light and thin electronic products.
The market demand for light and thin electronic products and the technological progress provide technical support for the development of product thinning, and particularly, the development of light guide plate thinning is rapid. At the moment, after the backlight module adopting the ultrathin LED chip and the ultrathin light guide plate is assembled, the contact area between the ultrathin LED chip and the ultrathin light guide plate is reduced, and the ultrathin LED chip and the ultrathin light guide plate are easy to fall off or shift, so that light leakage, light spots and light eyes are generated; on the other hand, the welding area of the ultrathin LED chip and a Flexible Printed Circuit (FPC) is reduced, so that the ultrathin LED chip is not stably connected, is easy to fall off and shift, and generates a lamp explosion fault.
Disclosure of Invention
The invention mainly solves the technical problem of providing a backlight module and a liquid crystal display device, which can solve the problems encountered in the process of ultra-thinning the backlight module, ensure that an LED light source and a light guide plate are stably connected, simultaneously enhance the connection strength of the LED light source and a Flexible Printed Circuit (FPC), greatly reduce light leakage and realize ultra-thinning of the backlight module.
In order to solve the above technical problems, one technical solution of the present invention is to provide a backlight module, which includes an LED light source, a light guide plate, and an optical film set. The light guide plate is arranged on one side of the LED light source. The optical film group comprises a diffusion film arranged above the light guide plate, a prism sheet arranged above the diffusion film, and a reflecting sheet arranged below the light guide plate. The LED light source comprises an LED chip main body and at least one retaining wall, the retaining wall extends towards the other end of the opening, the LED chip and the at least one retaining wall are integrally connected and form an accommodating space with an opening, the light guide plate is clamped in the accommodating space, and the LED chip main body emits light through the opening to the light guide plate.
The backlight module utilizes the arrangement of the retaining wall and the accommodating space on the LED light source to ensure that the LED chip is stably connected with the light guide plate, the light-emitting angle of the LED chip can be reduced, and the light emitted from the light-emitting port of the LED chip is totally emitted into the light guide plate, so that the problem of light leakage caused by height difference between the light-emitting port of the LED chip and the light-in surface of the ultrathin light guide plate is solved, and the light-emitting utilization rate and the light-emitting uniformity of the backlight module are further improved. The LED chip and the at least one retaining wall can be assembled into an integral connecting structure when the backlight module is integrated, and can also be assembled into an integral connecting structure before the backlight module is integrated, so that the production, the assembly process and the structure of the whole backlight module are simpler, and the structural stability is high.
In a preferred embodiment, the LED chip and the at least one retaining wall are integrally formed by injection molding.
Further, the LED chip, the at least one retaining wall and the light guide plate are of an integral structure integrally formed by injection molding. Further, an LED chip is arranged on the retaining wall.
In a preferred embodiment, the backlight module further comprises a flexible printed circuit board, and the retaining wall is connected with the flexible printed circuit board.
In a preferred embodiment, the LED light source comprises a continuous or discontinuous LED chip.
In a preferred embodiment, the backlight module further comprises a rubber frame, wherein the rubber frame is used for fixedly connecting the LED light source, the optical film group and the light guide plate; the backlight module further comprises shading glue, and the shading glue is used for bonding the LED light source, the optical diaphragm group and the light guide plate and reducing light leakage of the backlight module.
According to the embodiment of the present invention, the backlight module of the present invention is integrated with the LCD panel and the glass cover plate to form a liquid crystal display device, which can be applied to the liquid crystal display device. The backlight module is applied to a liquid crystal display device with fingerprint identification, and can greatly reduce light leakage and realize ultra-thinning of the backlight module.
Drawings
The invention and its advantages will be better understood by studying the following detailed description of specific embodiments, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a backlight module according to embodiment 1 of the invention.
Fig. 2 is a schematic structural diagram of an LED light source according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of a backlight module according to embodiment 2 of the invention.
Fig. 4 is a schematic structural diagram of an LED light source according to embodiment 2 of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated in an appropriate environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
The word "embodiment" is used herein to mean serving as an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise direct contact of the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Example 1
First, a backlight module according to embodiment 1 of the present invention will be described with reference to fig. 1 to 2. The backlight module according to embodiment 1 of the present invention includes an LED light source 103, a light guide plate 102 and an optical film set 101. The light guide plate 102 is disposed on the LED light source 103 side. The optical film group 101 includes a diffusion film 220 disposed above the light guide plate 102, a prism sheet 210 disposed above the diffusion film 220, and a reflective sheet 230 disposed below the light guide plate 102. The LED light source 103 includes an LED chip 1031 and two retaining walls 1032, the two retaining walls 1032 are respectively located above and below the LED chip 1031, the LED chip 1031 and the two retaining walls 1032 are integrally connected and form an accommodating space with an opening, the light guide plate 102 is clamped in the accommodating space, the light emitted by the LED chip 1031 is transmitted to the light guide plate 102 through the opening. The upper surface of the retaining wall 1032 above the LED chip 1031 is flush with the upper surface of the optical diaphragm set 101, and the lower surface of the retaining wall 1032 below the LED chip 1031 is flush with the lower surface of the optical diaphragm set 101, so that the backlight module is conveniently installed as a liquid crystal display and the light leakage is reduced. The LED chip can be a mini-LED chip or a micro-LED chip.
The backlight module of this embodiment utilizes the arrangement of the two retaining walls 1032 and the accommodating space 1033 on the LED light source 103 to connect the LED chip 1031 and the light guide plate 102 stably, so as to reduce the light emitting angle of the LED chip 1031, and to make all the light emitted from the light emitting port of the LED chip 1031 enter the light guide plate 102, thereby solving the problem of light leakage caused by height difference between the light emitting port of the LED chip 1031 and the light incident surface of the ultra-thin light guide plate 102, and further improving the light emitting utilization rate and the light emitting uniformity of the backlight module. The LED chip 1031 and the two retaining walls 1032 are integrally formed before the backlight module is integrated, so that the whole backlight module is simpler in production, assembly process and structure, and high in structural stability.
The retaining wall 1032 extends toward the other end of the opening. LED chip 1031 and two barricades 1032 are for moulding plastics integrated into one piece's integral structure.
The retaining wall 1032 is connected to the flexible printed circuit board 104, which enhances the connection strength between the LED light source 103 and the flexible printed circuit board 104.
The backlight module further comprises a rubber frame, and the rubber frame is used for fixedly connecting the LED light source 103, the optical film group 101 and the light guide plate 102; the backlight module further comprises a light shielding glue, and the light shielding glue is used for bonding the LED light source 103, the optical film group 101 and the light guide plate 102 and reducing light leakage of the backlight module.
The embodiment can solve the problems encountered in the backlight module ultra-thinning process, the LED light source 103 and the light guide plate 102 are stably connected, meanwhile, the connection strength of the LED light source 103 and the flexible printed circuit board 104 is enhanced, light leakage is greatly reduced, and ultra-thinning of the backlight module is realized.
Example 2
Fig. 3-4 are schematic structural diagrams of a backlight module according to embodiment 2 of the invention. Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The LED light source 103 includes an LED chip 1031 and two retaining walls 1032, the two retaining walls 1032 are respectively located above and below the LED chip 1031, the LED chip 1031 and the retaining walls 1032 are integrally connected and form an accommodating space with an opening, the light guide plate 102 is clamped in the accommodating space, the light emitted by the LED chip 1031 is transmitted to the light guide plate 102 through the opening. An upper retaining wall 1032 of the LED chip 1031 is disposed flush with the LED chip 1031, and an extension length of the upper retaining wall 1032 is shorter than that of the lower retaining wall 1032.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the present disclosure may be used in any combination, provided that there is no structural conflict, and the combination is not exhaustively described in this specification for brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A backlight module, comprising:
an LED light source;
the light guide plate is arranged on one side of the LED light source; and
an optical film group including a diffusion film disposed above the light guide plate, a prism sheet disposed above the diffusion film, and a reflective sheet disposed below the light guide plate;
the LED light source comprises an LED chip main body and at least one retaining wall, the LED chip and the at least one retaining wall are integrally connected to form an accommodating space with an opening, the light guide plate is clamped in the accommodating space, and the light emitted by the LED chip main body is transmitted to the light guide plate through the opening.
2. A backlight module according to claim 1, wherein: the retaining wall extends to the other end of the opening.
3. A backlight module according to claim 1, wherein: the LED chip and the at least one retaining wall are of an integral structure.
4. A backlight module according to claim 3, wherein: the LED chip, at least one retaining wall and the light guide plate are of an integrated structure.
5. The backlight module according to claim 4, wherein: and the retaining wall is provided with an LED chip.
6. A backlight module according to claim 1, wherein: the backlight module further comprises a flexible printed circuit board, and the retaining wall is connected with the flexible printed circuit board.
7. A backlight module according to claim 1, wherein: the LED light source comprises continuous or discontinuous LED chips.
8. A backlight module according to any of claims 1-7, characterized in that: the backlight module also comprises a rubber frame which is used for fixedly connecting the LED light source, the optical film group and the light guide plate; the backlight module further comprises shading glue, and the shading glue is used for bonding the LED light source, the optical diaphragm group and the light guide plate and reducing light leakage of the backlight module.
9. A liquid crystal display device comprising: an LCD panel, a glass cover plate, and a backlight module as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884526.3A CN110646975A (en) | 2019-09-19 | 2019-09-19 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910884526.3A CN110646975A (en) | 2019-09-19 | 2019-09-19 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110646975A true CN110646975A (en) | 2020-01-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910884526.3A Pending CN110646975A (en) | 2019-09-19 | 2019-09-19 | Backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110646975A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070044991A (en) * | 2005-10-26 | 2007-05-02 | 웬-쿵 숭 | Backlight module of omnidirectional led |
| CN201204211Y (en) * | 2008-04-18 | 2009-03-04 | 群康科技(深圳)有限公司 | Light emitting diode, backlight module unit and liquid crystal display apparatus |
| CN101546063A (en) * | 2008-03-27 | 2009-09-30 | 深圳帝光电子有限公司 | Ultra thin type LCD use backlight module taking LED as light source |
| CN102287709A (en) * | 2011-06-27 | 2011-12-21 | 友达光电股份有限公司 | Backlight module and manufacturing method thereof |
| CN202419335U (en) * | 2011-10-28 | 2012-09-05 | Tcl光电科技(惠州)有限公司 | Liquid crystal display and direct light-emitting diode (LED) backlight module |
| CN102767759A (en) * | 2012-07-04 | 2012-11-07 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| CN105895787A (en) * | 2016-06-06 | 2016-08-24 | 青岛海信电器股份有限公司 | Light-emitting diode (LED), LED packaging method, straight down type backlight module and liquid crystal display television |
| CN108180444A (en) * | 2017-12-28 | 2018-06-19 | 惠州市华星光电技术有限公司 | LED light source and side entrance back module, liquid crystal display device |
| CN208888540U (en) * | 2018-10-25 | 2019-05-21 | 深圳市隆利科技股份有限公司 | A kind of side entrance back module reducing reflection light loss |
-
2019
- 2019-09-19 CN CN201910884526.3A patent/CN110646975A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070044991A (en) * | 2005-10-26 | 2007-05-02 | 웬-쿵 숭 | Backlight module of omnidirectional led |
| CN101546063A (en) * | 2008-03-27 | 2009-09-30 | 深圳帝光电子有限公司 | Ultra thin type LCD use backlight module taking LED as light source |
| CN201204211Y (en) * | 2008-04-18 | 2009-03-04 | 群康科技(深圳)有限公司 | Light emitting diode, backlight module unit and liquid crystal display apparatus |
| CN102287709A (en) * | 2011-06-27 | 2011-12-21 | 友达光电股份有限公司 | Backlight module and manufacturing method thereof |
| CN202419335U (en) * | 2011-10-28 | 2012-09-05 | Tcl光电科技(惠州)有限公司 | Liquid crystal display and direct light-emitting diode (LED) backlight module |
| CN102767759A (en) * | 2012-07-04 | 2012-11-07 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| CN105895787A (en) * | 2016-06-06 | 2016-08-24 | 青岛海信电器股份有限公司 | Light-emitting diode (LED), LED packaging method, straight down type backlight module and liquid crystal display television |
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| CN208888540U (en) * | 2018-10-25 | 2019-05-21 | 深圳市隆利科技股份有限公司 | A kind of side entrance back module reducing reflection light loss |
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