CN110873983A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN110873983A CN110873983A CN201911201649.9A CN201911201649A CN110873983A CN 110873983 A CN110873983 A CN 110873983A CN 201911201649 A CN201911201649 A CN 201911201649A CN 110873983 A CN110873983 A CN 110873983A
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- backlight module
- circuit board
- flexible circuit
- tape
- conductive
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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
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
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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)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a backlight module which is used in a display module, wherein the display module comprises a display panel, the backlight module comprises a flexible circuit board and an annular shading adhesive tape, the two side surfaces of one end of the annular shading adhesive tape are respectively attached to the surfaces of the display panel and the flexible circuit board, a conductive adhesive tape is arranged between the annular shading adhesive tape and the display panel, the position of the conductive adhesive tape corresponds to the position of the flexible circuit board, a through hole is arranged on the annular shading adhesive tape, and a connecting part on the conductive adhesive tape penetrates through the through hole to be electrically connected with a grounding circuit on the flexible circuit board. According to the backlight module, the conductive adhesive tape is arranged, so that static electricity on the display panel can flow into the grounding end through the conductive adhesive tape and the flexible circuit board, the problem that the service life of the display panel is influenced due to damage of the static electricity to components in the backlight module is solved, and the service life of the display panel is prolonged.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a backlight module and a display device.
Background
Liquid crystal displays are passive light emitting elements and the display screen itself does not emit light but is illuminated by a backlight system underneath it. The display module comprises a display panel and a backlight module, and the backlight module and the liquid crystal display panel are combined together to form the liquid crystal display module. The backlight module is a planar uniform lighting device, and the LED lamp strips serving as light sources are arranged on two sides or one side of the whole backlight module. The shading glue is used as an indispensable part in the backlight module, and can be used for bonding the display panel and the backlight source in the backlight module to achieve the shading effect. In the assembly process of the backlight module, the commonly used light-shielding glue is an annular light-shielding glue, and the structure of the annular light-shielding glue is generally a frame-type continuous closed structure.
Currently, liquid crystal display modules are widely used in the fields of mobile phone products, industrial control products and the like, and poor ElectroStatic discharge (ESD) is one of the major defects of the liquid crystal display modules in the terminal consumer market. The most common types of failures caused by ESD are several: IC damage, ITO circuit damage, LED burn-out. The frameless project is favored by customers because of no bad howling and low cost, but the frameless project module faces the challenge of improving the ESD resistance.
The traditional liquid crystal display module mainly derives static electricity through a grounding area (GND PAD) on TFT glass, and due to the limitation of space, the area of the GND PAD on the TFT glass is very small, so that the damage of the static electricity to an LED cannot be effectively prevented.
Disclosure of Invention
The invention aims to provide a backlight module and a display device, which are used for improving the antistatic capacity of a product and improving the competitiveness of the product on the basis of not increasing the manufacturing cost.
According to one aspect of the invention, the backlight module is used in a display module, the display module comprises a display panel, the backlight module comprises a flexible circuit board and an annular shading tape, two side surfaces of one end of the annular shading tape are respectively attached to the surfaces of the display panel and the flexible circuit board, a conductive tape is arranged between the annular shading tape and the display panel on one side of the flexible circuit board, the position of the conductive tape corresponds to the position of the flexible circuit board, a through hole is formed in the annular shading tape, and a connecting part on the conductive tape penetrates through the through hole to be electrically connected with a grounding circuit on the flexible circuit board.
Optionally, the aperture of the through hole is smaller than the width of the conductive tape.
Optionally, the shape of the through hole is any one of circular, elliptical, and rectangular.
Optionally, the shape of the through hole is a rectangle, and one side of the rectangle is located on the edge of the annular shading tape
Optionally, the conductive tape is provided with breaking lines on two sides of the through hole, respectively, and a portion between the two breaking lines forms the connecting portion.
Optionally, the breaking line extends in a transverse direction of the conductive tape, and one end of the breaking line extends to an edge of the conductive tape.
Optionally, the flexible circuit board and the conductive adhesive tape are respectively arranged in a long strip shape, and the flexible circuit board is flush with one long side edge of the conductive adhesive tape.
Optionally, a leading-out end is arranged at one end close to the flexible circuit board, and the through hole is arranged at the other end close to the flexible circuit board.
Optionally, a latticed ground circuit is arranged on the surface of one side of the flexible circuit board, the side surface of the flexible circuit board is attached to the annular shading adhesive tape, copper leakage is arranged on the ground circuit, and the conductive adhesive tape is bonded with the ground circuit through the copper leakage.
Optionally, an electrode flush with the rubber frame is arranged on the surface of the other side of the flexible circuit board, and the electrode is arranged on the leading-out end and communicated with the grounding circuit.
Optionally, a protruding portion is formed on the conductive adhesive tape and protrudes outwards at a position corresponding to the electrode.
According to another aspect of the present invention, a display device is provided, which includes any one of the backlight modules described above.
The invention has the following beneficial effects:
according to the backlight module, the conductive adhesive tape is arranged, so that static electricity on the display panel can flow into the grounding end through the conductive adhesive tape and the flexible circuit board, the problem that the static electricity can damage circuits inside the display panel and other components in the backlight module and influence the service life of the display panel is solved, the electrostatic protection capability of the backlight module is improved, and the service life of the display panel is prolonged.
According to the backlight module, on the premise that assembly is not influenced, static electricity is LED out through the grounding end of the flexible circuit board, damage of the static electricity to the LED on the flexible circuit board is reduced, and damage caused by the static electricity is reduced. Meanwhile, the cost is improved very little, other procedures are not added, and the method can be compatible with the existing production line. The verification proves that the antistatic capacity of the backlight module reaches +/-15 kV.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 2 shows a cross-sectional view of an embodiment of the invention.
Fig. 3 is a schematic structural diagram of one side surface of the flexible circuit board according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the other side surface of the flexible circuit board according to the embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The thickness of the layers and the size and shape of the regions in the figures do not reflect the actual proportions of the layers and are intended to be merely illustrative of the present invention.
An embodiment of the present invention provides a backlight module, as shown in fig. 1 and 2, the backlight module includes: the backlight module comprises a conductive adhesive tape 1, an annular shading adhesive tape 2 and a flexible circuit board 3, wherein one side surface of the annular shading adhesive tape 2 is attached to the light emergent side of the backlight module, the other side surface of the annular shading adhesive tape 2 is bonded with a display panel of the display module, and the annular shading adhesive tape 2 is used for bonding the backlight module body and the display panel. The conductive tape 1 and the flexible circuit board 3 are respectively attached to the two side surfaces of one end of the annular shading tape 2, one side surface of the conductive tape 1 is bonded with the annular shading tape, and the other side surface is bonded with the display panel, so that a sandwich structure comprising the conductive tape 1, the annular shading tape 2 and the flexible circuit board 3 is formed at one end of the annular shading tape 2.
The annular shading adhesive tape 2 is provided with a through hole 21, the connecting part 11 on the conductive adhesive tape 1 penetrates through the through hole 21 to be electrically connected with the grounding circuit on the flexible circuit board 3, and static electricity on the display panel and the backlight module can flow into the grounding end through the conductive adhesive tape 1 and the flexible circuit board 3. The display panel may not be included in the backlight module provided in the embodiments of the present invention.
According to the backlight module provided by the embodiment of the invention, the conductive adhesive tape is arranged, so that static electricity on the display panel and the backlight module can flow into the grounding end through the conductive adhesive tape and the flexible circuit board, the problem that the static electricity in the related technology can damage an internal circuit of the display panel and other components in the backlight module and influence the service life of the display panel is solved, and the effects of improving the static electricity protection capability of the backlight module and prolonging the service life of the display panel are achieved.
Referring to fig. 1, the width of the conductive tape 1 is smaller than the width of the annular light-shielding tape 2, the aperture of the through hole 21 formed in the annular light-shielding tape 2 is smaller than the width of the conductive tape 1, that is, the conductive tape 1 completely covers the through hole 21, and the conductive tape 1 is adhered to the flexible circuit board 3 after the through hole 21 is completely filled with the conductive tape 1, so that the adhesion area between the conductive tape 1 and the flexible circuit board 3 can be increased, and the connection strength between the conductive tape 1 and the flexible circuit board 3 can be increased. Specifically, the shape of the through hole 21 may be any one of a circle, an ellipse, or a rectangle, and the shape of the through hole 21 in this embodiment is a rectangle, and the rectangular through hole is located at the edge position of the ring-shaped light-shielding tape 2, that is, one side of the through hole 21 is located on the edge of the ring-shaped light-shielding tape 2. That is, the edge of the ring-shaped light-shielding tape 2 is recessed inward to form a through-hole 21, and one side of the through-hole 21 is open. This structure facilitates the processing of the through-hole 21 in the annular light-shielding tape 2.
Further, two breaking lines 12 are arranged on the conductive adhesive tape 1, the two breaking lines 12 are respectively located at two sides of the through hole 21, a portion between the two breaking lines 12 forms the connecting portion 11, and when the connecting portion 11 passes through the through hole 21 to be bonded with the flexible circuit board 3, the portion, located at the through hole 21, of the connecting portion 11 is separated from the body of the connecting portion 11 by the breaking lines 12, so that the connecting portion 11 passes through the through hole 21 to be bonded with the flexible circuit board 3. Specifically, two breaking lines 12 extend in the transverse direction of the conductive tape 1, respectively, and one end of the breaking line 12 extends out of the edge of the conductive tape 1.
Optionally, the flexible circuit board 3 and the conductive tape 1 are respectively in a long strip shape, and the shapes of the flexible circuit board 3 and the conductive tape 1 are substantially the same, and the flexible circuit board 3 is flush with one long side edge of the conductive tape 1. The conductive tape 1 may be a filler type conductive tape composed of a base and conductive fillers, or the conductive tape 1 may be a base type conductive tape composed of a conductive base.
As shown in fig. 3, a terminal 31 is provided near one end of the flexible circuit board 3, and the terminal 31 is used for connection with an external circuit. The through hole 21 on the annular shading tape 2 is opened at the other end close to the flexible circuit board 3, and correspondingly, the other end close to the flexible circuit board 3 is provided with copper leakage 32. The side surface of the flexible circuit board shown in fig. 3 is glued to the annular light shielding tape 2, and the connecting portion 11 on the conductive tape 1 passes through the through hole 21 and is glued to the copper leakage 32.
Optionally, the connection portion 11 may completely cover the copper leakage 32, so that the conductivity between the conductive tape 1 and the flexible circuit board 3 may be increased, which is beneficial for the conductive tape 1 to guide out static electricity on the display panel, and enhances the static electricity protection capability of the backlight module.
Referring further to fig. 3, one side surface of the flexible circuit board 3 is provided with a grid-shaped grounding circuit 33, the copper leakage 32 is disposed on the grounding circuit 33, and the conductive tape 1 is electrically connected to the grid-shaped grounding circuit 33 by being bonded to the copper leakage 32. The grid-shaped grounding circuit can increase the electrostatic conducting capacity of copper, so that the static electricity can be quickly led out through the grounding end.
As shown in fig. 4, a plurality of LED lamp beads 34 are disposed on the other side surface of the flexible circuit board 3, and the flexible circuit board 3 is configured as a backlight lamp strip circuit board. The LED lamp beads 34 are point light sources, the light sources are converted into surface light sources, a light guide plate needs to be used, optical films are placed above the light guide plate, the films play a role in homogenizing light rays and converging large-angle light for front observation, and the like.
With further reference to fig. 4, an electrode 35 is provided at the leading end of the flexible circuit board 3 of the side surface, the electrode 35 being flush with the edge of the bezel. And copper leakage treatment is also performed at the electrode 35 on the flexible circuit board 3, so that the electrode 35 is exposed to the outside, and the electrode 35 is electrically connected with a grounding circuit on the flexible circuit board 3, thereby improving the conduction of the flexible circuit board 3 to outside static electricity.
Referring to fig. 1 and 4 again, the conductive tape 1 is provided with a protrusion 13 at a position corresponding to the electrode 35, and an edge of the conductive tape 1 protrudes outward to form the protrusion 13. The protruding portion 13 protrudes the rubber frame by 0.3mm, the protruding portion 13 improves the attraction of the conductive adhesive tape to external static electricity, and static electricity is led out through the flexible circuit board 3, so that the leading-out of the backlight module to the static electricity is further improved. In addition, because the protruding portion 13 is located above the leading-out end 31 of the flexible circuit board 3, the protruding portion 13 also fills the gap between the flexible circuit board 3 and the rubber frame, and the sealing performance of the backlight module is improved.
The invention also discloses a display device which comprises the backlight module.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (12)
1. The utility model provides a backlight module which characterized in that for in the display module assembly, the display module assembly includes display panel, backlight module includes flexible circuit board and annular shading sticky tape, the both sides surface of annular shading sticky tape one end respectively in the surface of display panel and flexible circuit board, be located flexible circuit board one side be equipped with electrically conductive sticky tape between annular shading sticky tape and the display panel, electrically conductive sticky tape's position with the position of flexible circuit board is corresponding, the through-hole has been seted up on the annular shading sticky tape, connecting portion on the electrically conductive sticky tape pass the through-hole with the ground circuit electricity on the flexible circuit board is connected.
2. A backlight module according to claim 1, wherein the aperture of the through hole is smaller than the width of the conductive tape.
3. A backlight module according to claim 1, wherein the through holes have any one of a circular, elliptical and rectangular shape.
4. The backlight module as claimed in claim 3, wherein the through hole has a rectangular shape, and one side of the rectangular shape is located on the edge of the annular light-shielding tape.
5. The backlight module according to claim 4, wherein the conductive tape is provided with breaking lines at two sides of the through hole, and a portion between the two breaking lines forms the connecting portion.
6. The backlight module according to claim 5, wherein the breaking line extends along a transverse direction of the conductive tape, and one end of the breaking line extends to an edge of the conductive tape.
7. The backlight module as claimed in claim 1, wherein the flexible circuit board and the conductive tape are respectively configured in a strip shape, and the flexible circuit board is flush with a long side edge of the conductive tape.
8. The backlight module as claimed in claim 7, wherein a terminal is disposed near one end of the flexible circuit board, and the through hole is disposed near the other end of the flexible circuit board.
9. The backlight module as claimed in claim 7, wherein a grid-shaped grounding circuit is disposed on a side surface of the flexible printed circuit, the side surface is attached to the annular light-shielding tape, a copper leakage is disposed on the grounding circuit, and the conductive tape is bonded to the grounding circuit through the copper leakage.
10. The backlight module as claimed in claim 9, wherein the other side surface of the flexible circuit board is provided with an electrode flush with the adhesive frame, the electrode is disposed on the lead-out end and is communicated with the ground circuit.
11. A backlight module according to claim 10, wherein the conductive adhesive tape protrudes outward to form a protrusion corresponding to the electrode.
12. A display device comprising the backlight module according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201649.9A CN110873983B (en) | 2019-11-29 | 2019-11-29 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201649.9A CN110873983B (en) | 2019-11-29 | 2019-11-29 | Backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN110873983A true CN110873983A (en) | 2020-03-10 |
| CN110873983B CN110873983B (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911201649.9A Active CN110873983B (en) | 2019-11-29 | 2019-11-29 | Backlight module and display device |
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| CN (1) | CN110873983B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823185A (en) * | 2020-06-19 | 2021-12-21 | 洪文彬 | Electronic device |
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|---|---|---|---|---|
| KR20080097778A (en) * | 2007-05-03 | 2008-11-06 | 엘지이노텍 주식회사 | Lcd module |
| CN105786244A (en) * | 2016-02-04 | 2016-07-20 | 京东方科技集团股份有限公司 | Display module and display device |
| CN206541104U (en) * | 2017-03-21 | 2017-10-03 | 江西合力泰科技有限公司 | A kind of Antistatic liquid crystal display module |
| CN208060894U (en) * | 2018-02-08 | 2018-11-06 | 深圳同兴达科技股份有限公司 | A kind of novel FPC and the display device with the structure |
| CN109168255A (en) * | 2018-09-29 | 2019-01-08 | 珠海晨新科技有限公司 | A kind of flexible circuit board structure and LCD module |
| CN208488628U (en) * | 2018-07-24 | 2019-02-12 | 华显光电技术（惠州）有限公司 | Backlight module and display device |
-
2019
- 2019-11-29 CN CN201911201649.9A patent/CN110873983B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080097778A (en) * | 2007-05-03 | 2008-11-06 | 엘지이노텍 주식회사 | Lcd module |
| CN105786244A (en) * | 2016-02-04 | 2016-07-20 | 京东方科技集团股份有限公司 | Display module and display device |
| CN206541104U (en) * | 2017-03-21 | 2017-10-03 | 江西合力泰科技有限公司 | A kind of Antistatic liquid crystal display module |
| CN208060894U (en) * | 2018-02-08 | 2018-11-06 | 深圳同兴达科技股份有限公司 | A kind of novel FPC and the display device with the structure |
| CN208488628U (en) * | 2018-07-24 | 2019-02-12 | 华显光电技术（惠州）有限公司 | Backlight module and display device |
| CN109168255A (en) * | 2018-09-29 | 2019-01-08 | 珠海晨新科技有限公司 | A kind of flexible circuit board structure and LCD module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823185A (en) * | 2020-06-19 | 2021-12-21 | 洪文彬 | Electronic device |
| CN113823185B (en) * | 2020-06-19 | 2023-09-12 | 群创光电股份有限公司 | electronic device |
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| Publication number | Publication date |
|---|---|
| CN110873983B (en) | 2022-08-09 |
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