CN108873474B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN108873474B CN108873474B CN201810713234.9A CN201810713234A CN108873474B CN 108873474 B CN108873474 B CN 108873474B CN 201810713234 A CN201810713234 A CN 201810713234A CN 108873474 B CN108873474 B CN 108873474B
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- backlight module
- grounding
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- circuit board
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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
- G02F1/133—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
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- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight module and a display device, wherein the backlight module comprises a first flexible circuit board and comprises: a main body portion; one or more light emitting elements mounted on the main body portion; and a first connecting part coupled to the main body part; the second connecting part is coupled with the main body part; the grounding part is coupled to the second connecting part; the shading glue is attached to the main body part of the first flexible circuit board; when the second connecting part is folded back, the grounding part is positioned on the shading glue. The backlight module and the display device are provided with a grounding part and connected to the first flexible circuit board through the second connecting part, when static electricity is generated, the static electricity can be transmitted to the grounding part in real time and can not be transmitted to the light-emitting element, and then the static electricity is transmitted to the main flexible circuit board through the second connecting part and the first connecting part to discharge, so that the light-emitting element is prevented from being damaged by the static electricity. In addition, because the grounding part is reversely folded along the second connecting part and attached to the shading glue, a layer of PET does not need to be additionally arranged, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and a display device.
Background
The thin film transistor liquid crystal display (TFT-LCD) has the advantages of low voltage, low power consumption, large display information amount, easy colorization, and the like, and occupies a leading position in the current display market. It has been widely used in electronic devices such as electronic computers, electronic notebooks, mobile phones, video cameras, high-definition televisions, and the like.
Most of the existing liquid crystal displays in the market are backlight type liquid crystal displays, including a liquid crystal panel and a backlight module, where the liquid crystal panel and the backlight module are arranged oppositely, and the backlight module provides a display light source for the liquid crystal panel to make the liquid crystal panel display images, and for the backlight module, a Light Emitting Diode (LED) has been widely used as a backlight source.
Referring to fig. 1 and 2, fig. 1 is a partial schematic view illustrating a conventional backlight module, and fig. 2 is a schematic view illustrating a structure of a light bar 14. As shown in fig. 1, the backlight module 1 includes an iron frame 11, a plastic frame 12, a lamp glue 13, a lamp strip 14, a light-shielding glue 15, a PET material layer 16, and a reflective sheet 17.
As can be seen from fig. 1, the plastic frame 12 and the reflective sheet 17 are assembled in the metal frame 11, the lamp glue 13 is used to fix the light bar 14 on the plastic frame 12, the light-shielding glue 15 is disposed on the light bar 14, and the PET material layer 16 is disposed on the light-shielding glue 15, which is used to form a "glue-free region", specifically, due to the double-sided viscosity of the light-shielding glue 15, in order to prevent the light-shielding glue 15 from adhering to a display panel (not shown) above, a layer of Polyethylene terephthalate (PET) material layer 16 needs to be adhered, so that adhesion to the display panel is avoided, and functions of preventing breakage, facilitating rework and the like are performed.
As shown in fig. 1 and 2, the light bar 14 includes a main body 141 and a plurality of LED lamps 142, and the LED lamps 142 are soldered on the main body 141 by Surface Mount Technology (SMT).
However, for the conventional backlight module 1, because the light bar 14 has no GND ground design, the static electricity around the LED lamp 142 cannot be conducted away, and is easily damaged by being hit, or even causes a dead lamp. In addition, because the light shielding glue 15 needs to be additionally attached with the PET material layer 16, the cost is increased.
Disclosure of Invention
In view of the above, the present invention provides a backlight module and a display device to solve the problems of lamp damage caused by the non-grounded design of the existing light bar and cost caused by the need of attaching a PET material layer.
One aspect of the present invention provides a backlight module including
A first flexible circuit board comprising:
a main body portion;
one or more light emitting elements mounted on the body portion; and
a first connecting part coupled to the main body part;
a second connecting portion coupled to the body portion;
a grounding part coupled to the second connecting part; and
a light shielding adhesive attached to the main body portion of the first flexible circuit board;
when the second connecting part is folded back, the grounding part is positioned on the shading glue.
In one embodiment, the main body includes a first end, a second end, a first surface and a second surface, wherein the first end corresponds to the second end, and the first surface corresponds to the second surface.
In one embodiment, the second connecting portion is coupled to the first end of the main body portion, and the grounding portion is attached to the light blocking adhesive near the second surface.
In one embodiment, the grounding portion covers the first end to the second end of the main body portion.
In one embodiment, the second connection portion includes a first connection section coupled to the first face of the body portion proximate the first end, a second connection section coupled to the first face of the body portion proximate the second end;
the grounding part comprises a first grounding subsection and a second grounding subsection which are respectively coupled with the first connecting subsection and the second connecting subsection and are respectively attached to the shading glue close to the second face.
In one embodiment, the grounding portion is a copper foil.
In one embodiment, the thickness of the copper foil is 0.04-0.07 mm.
In one embodiment, the second connection portion is a flexible circuit board structure or a copper foil structure.
In one embodiment, the backlight module further includes a second flexible circuit board coupled to the first flexible circuit board through the first connection portion.
In one embodiment, the light emitting element is an LED, a Mini-LED or a Micro-LED.
Another aspect of the present invention provides a display device, including the backlight module described in any of the above embodiments.
The backlight module and the display device provided by the invention are provided with the grounding part and are connected to the first flexible circuit board through the second connecting part, when static electricity is generated, the static electricity can be transmitted to the grounding part in real time and can not be transmitted to the light-emitting element, and then the static electricity is transmitted to the main flexible circuit board through the second connecting part and the first connecting part to discharge, so that the light-emitting element is prevented from being damaged by the static electricity. In addition, the grounding part is reversely folded along the second connecting part and attached to the shading glue, so that a layer of PET does not need to be additionally arranged, and the cost can be saved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a partial schematic view of a conventional backlight module;
fig. 2 is a schematic structural diagram of the light bar 14;
FIG. 3 is a schematic partial structure view of a backlight module according to an embodiment of the invention;
FIG. 3A is a partial schematic view of the backlight module shown in FIG. 3;
FIG. 3B is a schematic view of the backlight module shown in FIG. 3A after the connecting portion is folded;
FIG. 3C is a schematic view illustrating the operation of the backlight module shown in FIG. 3;
FIG. 4 is a schematic partial structure view of a backlight module according to another embodiment of the present invention;
FIG. 4A is a partial schematic view of the backlight module shown in FIG. 4; and
fig. 4B is a schematic diagram illustrating the backlight module of fig. 4A after the connecting portion is folded back.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
It is also noted that the term "coupled," as used herein, is inclusive of direct and indirect connections.
Referring to fig. 3, fig. 3A and fig. 3B, fig. 3 is a schematic partial structure diagram of a backlight module according to an embodiment of the invention; FIG. 3A is a partial schematic view of the backlight module shown in FIG. 3; FIG. 3B is a schematic view of the backlight module shown in FIG. 3A after the connecting portion is folded; FIG. 3C is a schematic view illustrating the operation of the backlight module shown in FIG. 3.
As can be seen from the figure, the backlight module 3 includes an iron frame 31, a rubber frame 32, a lamp glue 33, a first flexible circuit board 34, a light shielding glue 35, a reflective sheet 37, a second connecting portion 38, and a grounding portion 39.
The first flexible circuit board 34 includes a main body portion 341, one or more light emitting elements 342 mounted on the main body portion 341, and a first connection portion 343, wherein only one light emitting element 342 is schematically illustrated in the figure for the sake of brevity, and the first connection portion 343 is coupled to the main body portion 341. A second connection portion 38 coupled to the body portion 341; the grounding portion 39 is coupled to the second connection portion 38.
In addition, the rubber frame 32 and the reflective sheet 37 are assembled in the iron frame 31, the lamp glue 33 is used for fixing the flexible circuit board 34 on the rubber frame 32, and the light shielding glue 35 is provided on the flexible circuit board 34, that is, the light shielding glue 35 is attached to the main body portion 341 of the first flexible circuit board 34.
In the present embodiment, when the second connection portion 38 is folded back, the grounding portion 39 is positioned above the light shielding paste 35. Specifically, as shown in fig. 3A, the grounding portion is turned over the main body portion 341 along with the reverse folding of the second connecting portion 38, and then covered and adhered on the light-shielding adhesive 35, as shown in fig. 3C.
In this embodiment, the main body 341 includes a first end, a second end, a first surface and a second surface, wherein the first end corresponds to the second end, the first surface corresponds to the second surface, the first end is close to the second connecting portion 38, the second end is far away from the second connecting portion 38, the first surface is close to the lamp glue 33, and the second surface is close to the light-shielding glue 35.
In this embodiment, the second connecting portion 38 is coupled to the first end of the main body portion 341, and the grounding portion 39 is attached to the light-shielding glue 35 near the second surface of the main body portion 341, and preferably, the grounding portion 39 covers the first end to the second end of the main body portion 341, that is, covers the light-shielding glue 35 corresponding to the first end to the second end of the main body portion 341, but not limited thereto, and may not cover completely, but only partially.
In this embodiment, the backlight module 3 may further include a second flexible circuit board (not shown), i.e., a main flexible circuit board, coupled to the first flexible circuit board 34 through the first connection portion 343, and the grounding portion 39 may transmit static electricity to the main flexible circuit board through the first connection portion 343 for discharging.
In the present embodiment, the grounding portion 39 is a copper foil, preferably a whole copper foil, so that it can be attached to the light shielding adhesive 35 in a whole piece. The thickness of the copper foil can be determined according to the actual gap value between the light-shielding glue 35 and the display panel, and preferably, can be 0.04-0.07 mm.
In the present embodiment, the second connection portion 38 is a flexible circuit board structure, and is preferably integrally formed with the main body portion 341.
In this embodiment, the light emitting element 342 may be an LED, a Mini-LED, a Micro-LED, or the like.
It should be noted that the backlight module 3 of the present embodiment may also include other components, such as a light guide plate, a diffusion sheet, a prism sheet, and the like, but for brevity, the description is not repeated herein.
In the present embodiment, since the backlight module 3 has the grounding portion 39 and is connected to the first flexible circuit board 34 through the second connecting portion 38, when static electricity is generated, the static electricity is immediately transmitted to the grounding portion 39 and is not transmitted to the light emitting element 342, and then the static electricity is transmitted to the main flexible circuit board through the second connecting portion 38 and the first connecting portion 341 for discharging, so as to prevent the light emitting element 342 from being damaged by the static electricity. In addition, since the grounding portion 39 is folded along the second connection portion 38 and attached to the light shielding adhesive 35, an additional layer of PET is not required, and thus, the cost can be saved.
Referring to fig. 4, 4A and 4B, fig. 4 is a schematic partial structure view of a backlight module according to another embodiment of the invention; FIG. 4A is a partial schematic view of the backlight module shown in FIG. 4; fig. 4B is a schematic diagram illustrating the backlight module of fig. 4A after the connecting portion is folded back.
As can be seen from the figure, the backlight module 4 includes an iron frame 41, a rubber frame 42, a lamp glue 43, a first flexible circuit board 44, a light shielding glue 45, a reflective sheet 47, a second connecting portion 48, and a grounding portion 49.
The first flexible circuit board 44 includes a main body 441, one or more light emitting elements 442 mounted on the main body 441, and a first connection portion 443 coupled to the main body 441. A second connecting portion 48 coupled to the body portion 441; the grounding portion 49 is coupled to the second connection portion 48.
In addition, the rubber frame 42 and the reflective sheet 47 are assembled in the iron frame 41, the lamp glue 43 is used for fixing the first flexible circuit board 44 on the rubber frame 42, and the light-shielding glue 45 is arranged on the first flexible circuit board 44, that is, the light-shielding glue 45 is attached to the main body portion 441 of the first flexible circuit board 44.
In this embodiment, the main body 441 includes a first end, a second end, a first surface and a second surface, wherein the first end corresponds to the second end, the first surface corresponds to the second surface, the first surface is close to the light adhesive 43, and the second surface is close to the light-shielding adhesive 45.
In the present embodiment, the second connection portion 48 includes a first connection branch 48a and a second connection branch 48b, the first connection branch 48a is coupled to the first surface of the body portion 441 near the first end, and the second connection branch 48b is coupled to the first surface of the body portion 441 near the second end. Correspondingly, the grounding portion 49 includes a first grounding subsection 49a and a second grounding subsection 49b, which are respectively coupled to the first connecting subsection 48a and the second connecting subsection 48b, and are respectively attached to the light-shielding glue 45 near the second side.
As can be seen, when the first connecting sub-portion 48a and the second connecting sub-portion 48b are folded back, the first grounding sub-portion 49a and the second grounding sub-portion 49b are turned over to be located above the light shielding glue 45 and attached to the light shielding glue 45.
In this embodiment, the backlight module 4 may further include a second flexible circuit board (not shown), i.e., a main flexible circuit board, coupled to the first flexible circuit board 44 through the first connection portion 443.
In the present embodiment, the first grounding sub-portion 49a and the second grounding sub-portion 49b are made of copper foil, preferably, a whole piece of copper foil, so that the first grounding sub-portion and the second grounding sub-portion can be attached to the light shielding adhesive 45 in a whole piece. The thickness of the copper foil can be determined according to the actual gap value between the light-shielding glue 45 and the display panel, and preferably, can be 0.04-0.07 mm.
In the present embodiment, the first and second connecting branches 48a and 48b are formed of a flexible circuit board structure, and are preferably integrally formed with the main body 441.
In this embodiment, the light emitting element 442 may be an LED, a Mini-LED, a Micro-LED, or the like.
In the present embodiment, since the backlight module 4 has the first grounding branch 49a and the second grounding branch 49b, which are connected to the first flexible circuit board 44 through the first connecting branch 48a and the second connecting branch 48b, respectively, when static electricity is generated, the static electricity is instantly transmitted to the first grounding branch 49a and the second grounding branch 49b, and is not transmitted to the light emitting element 442, and then the static electricity is transmitted to the main flexible circuit board through the first connecting branch 48a and the second connecting branch 48b, and is discharged, so that the light emitting element 442 is prevented from being damaged by the static electricity. In addition, since the first grounding sub-portion 49a and the second grounding sub-portion 49b are respectively folded along the first connecting sub-portion 48a and the second connecting sub-portion 48b and attached to the light shielding glue 45, an additional layer of PET is not required, thereby saving the cost.
In another embodiment, a display device may include the backlight module shown in fig. 3, 3A, and 3B, or may include the backlight module shown in fig. 4, 4A, and 4B. Of course, the display device of the present embodiment may further include a display panel, the display panel may be a liquid crystal display panel, and the display panel and the backlight module may be arranged in a stacked manner, and for brevity, no further description is provided herein.
The backlight module provided by the invention is provided with a grounding part and is connected to the first flexible circuit board through the second connecting part, when static electricity is generated, the static electricity can be transmitted to the grounding part in real time and can not be transmitted to the light-emitting element, and then the static electricity is transmitted to the main flexible circuit board through the second connecting part and the first connecting part to discharge, so that the light-emitting element is prevented from being damaged by the static electricity. In addition, the grounding part is reversely folded along the second connecting part and attached to the shading glue, so that a layer of PET does not need to be additionally arranged, and the cost can be saved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A backlight module, comprising:
a first flexible circuit board comprising:
a main body portion;
one or more light emitting elements mounted on the body portion; and
a first connecting part coupled to the main body part;
a second connecting portion coupled to the body portion;
a grounding part coupled to the second connecting part; and
a light shielding adhesive attached to the main body portion of the first flexible circuit board;
when the second connecting part is folded back, the grounding part is positioned on the shading glue.
2. The backlight module according to claim 1, wherein the main body comprises a first end, a second end, a first surface and a second surface, wherein the first end corresponds to the second end, and the first surface corresponds to the second surface.
3. The backlight module as claimed in claim 2, wherein the second connecting portion is coupled to the first end of the main body portion, and the grounding portion is attached to the light blocking glue near the second surface.
4. The backlight module according to claim 3, wherein the grounding portion covers the first end to the second end of the main body portion.
5. A backlight module according to claim 2, wherein:
the second connection portion includes a first connection subsection coupled to the first face of the body portion proximate the first end, a second connection subsection coupled to the first face of the body portion proximate the second end;
the grounding part comprises a first grounding subsection and a second grounding subsection which are respectively coupled with the first connecting subsection and the second connecting subsection and are respectively attached to the shading glue close to the second face.
6. The backlight module according to claim 1, wherein the grounding part is a copper foil.
7. The backlight module as claimed in claim 6, wherein the copper foil has a thickness of 0.04-0.07 mm.
8. The backlight module as claimed in claim 1, wherein the second connecting portion is a flexible circuit board structure or a copper foil structure.
9. The backlight module of claim 1, further comprising:
a second flexible circuit board coupled to the first flexible circuit board through the first connection portion.
10. The backlight module as claimed in claim 1, wherein the light emitting elements are Mini-LEDs or Micro-LEDs.
11. A display device comprising a backlight module according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713234.9A CN108873474B (en) | 2018-06-29 | 2018-06-29 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713234.9A CN108873474B (en) | 2018-06-29 | 2018-06-29 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN108873474A CN108873474A (en) | 2018-11-23 |
| CN108873474B true CN108873474B (en) | 2021-08-13 |
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| CN201810713234.9A Active CN108873474B (en) | 2018-06-29 | 2018-06-29 | Backlight module and display device |
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| KR20080097778A (en) * | 2007-05-03 | 2008-11-06 | 엘지이노텍 주식회사 | Lcd module |
| KR20090017778A (en) * | 2007-08-16 | 2009-02-19 | 엘지이노텍 주식회사 | Lcd module |
| CN101799594A (en) * | 2009-02-10 | 2010-08-11 | 胜华科技股份有限公司 | Liquid crystal display device |
| CN101866069A (en) * | 2009-04-17 | 2010-10-20 | 群康科技(深圳)有限公司 | Display device |
| CN205405018U (en) * | 2016-02-19 | 2016-07-27 | Tcl显示科技（惠州）有限公司 | Display module assembly and display device are shaded |
| CN106444154A (en) * | 2016-11-16 | 2017-02-22 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN107966858A (en) * | 2017-12-25 | 2018-04-27 | 维沃移动通信有限公司 | Backlight module and display device |
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2018
- 2018-06-29 CN CN201810713234.9A patent/CN108873474B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080097778A (en) * | 2007-05-03 | 2008-11-06 | 엘지이노텍 주식회사 | Lcd module |
| KR20090017778A (en) * | 2007-08-16 | 2009-02-19 | 엘지이노텍 주식회사 | Lcd module |
| CN101799594A (en) * | 2009-02-10 | 2010-08-11 | 胜华科技股份有限公司 | Liquid crystal display device |
| CN101866069A (en) * | 2009-04-17 | 2010-10-20 | 群康科技(深圳)有限公司 | Display device |
| CN205405018U (en) * | 2016-02-19 | 2016-07-27 | Tcl显示科技（惠州）有限公司 | Display module assembly and display device are shaded |
| CN106444154A (en) * | 2016-11-16 | 2017-02-22 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN107966858A (en) * | 2017-12-25 | 2018-04-27 | 维沃移动通信有限公司 | Backlight module and display device |
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| Publication number | Publication date |
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| CN108873474A (en) | 2018-11-23 |
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