CN202493967U - Light emitting strip, backlight component and display device - Google Patents
Light emitting strip, backlight component and display device Download PDFInfo
- Publication number
- CN202493967U CN202493967U CN2012201465572U CN201220146557U CN202493967U CN 202493967 U CN202493967 U CN 202493967U CN 2012201465572 U CN2012201465572 U CN 2012201465572U CN 201220146557 U CN201220146557 U CN 201220146557U CN 202493967 U CN202493967 U CN 202493967U
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- circuit board
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Abstract
The utility model provides a light emitting strip, a backlight component and a display device. The light emitting strip comprises a light emitting strip main body and a flexible circuit board, wherein the light emitting strip main body is a metal base printed circuit board; a light source is arranged on the metal base printed circuit board; the flexible circuit board and the light emitting strip main body have an integrated structure; the metal base printed circuit board comprises a metal substrate, a circuit layer and an insulating layer which is sandwiched between the metal substrate and the circuit layer; a circuit route which is connected to the light source is distributed on the circuit layer; and a connecting circuit is distributed on the flexible circuit board and is electrically connected with the corresponding circuit route on the circuit layer to form a conductive circuit from the light source to an external light source driver. According to the light emitting strip, a better radiating effect can be realized, and meanwhile, wiring design is convenient.
Description
Technical Field
The utility model relates to a show technical field, concretely relates to light-emitting strip, backlight unit and display device.
Background
The backlight source is a light source located behind the liquid crystal display panel, and the lighting effect of the backlight source directly affects the visual effect of the liquid crystal display. The liquid crystal display panel itself does not emit light, and the display of graphics or characters is a result of its modulation of light. The backlight may be classified into a direct type and an edge type according to the position where the light source is disposed.
The side light type backlight assembly has the characteristics of light weight, thinness, narrow framing and low power consumption, accords with the development trend of the market, and is particularly widely used in the field of large-size ultrathin liquid crystal televisions. The side-light type backlight module mainly comprises a light guide plate, a light-emitting strip, an optical film material and a structural member (a back plate, a frame and the like). The light guide plate is used for converting a point light source or a line light source into a plane light source. The light guide plate is generally disposed on a side of a Liquid Crystal Display (LCD) receiving incident light, and is used to convert a point light source or a line light source into a planar light source; the optical film is generally disposed between the light guide plate and the LCD, the light source is disposed at a side of the light guide plate, and the bottom reflective sheet is disposed around a rear side of the light guide plate to reflect light.
In the prior art, the problem of heat dissipation of the LED light source arranged at the side edge of the light guide plate is generally considered in the large-size side-light LED backlight assembly. Especially for large-sized liquid crystal displays, the heat dissipation problem becomes an important problem to be solved because a larger number of LED light sources are provided. In addition, in the development of ultra-thin devices, since it is desired that the LED light emitting bars are disposed only at the side edges to reduce the thickness of the devices, the LED light emitting bars are generally employed in a long bar shape, which causes difficulty in the outgoing lines of the light emitting bars.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a light-emitting strip, a backlight assembly and a display device, which improve the heat dissipation problem of the light-emitting strip.
In order to solve the technical problem, the utility model provides a scheme as follows:
a light bar, comprising:
the light-emitting strip comprises a light-emitting strip main body, a light source and a light source, wherein the light-emitting strip main body is a metal-based printed circuit board on which a light source is arranged;
the flexible circuit board and the metal-based printed circuit board are of an integrated structure; wherein,
the metal-based printed circuit board comprises a metal substrate, a circuit layer and an insulating layer clamped between the metal substrate and the circuit layer, wherein circuit wires connected to the light source are distributed on the circuit layer;
the flexible circuit board is provided with a connecting circuit, and the connecting circuit is electrically connected with the corresponding circuit wires on the circuit layer to form a conductive circuit from the light source to the external light source driver.
Preferably, in the above-mentioned light-emitting strip,
the flexible circuit board comprises a substrate film layer, a copper foil layer and an adhesive layer clamped between the substrate film and the copper foil layer, and the connecting circuit is arranged in the copper foil layer.
Preferably, in the above-mentioned light-emitting strip,
the flexible circuit board with the light-emitting strip main part links to each other, specifically does:
the flexible circuit board and the light emitting strip main body are bonded together through a lamination process.
Preferably, in the above-mentioned light-emitting strip,
the metal-based printed circuit board is an aluminum substrate, and the light source is a light emitting diode.
The utility model also provides a backlight assembly, include the light guide plate, be located the light strip of light guide plate side and being located the backplate of light guide plate below, wherein the light strip includes:
the light-emitting strip comprises a light-emitting strip main body, a light source and a light source, wherein the light-emitting strip main body is a metal-based printed circuit board on which a light source is arranged;
the flexible circuit board is connected with the light-emitting strip main body; wherein,
the metal-based printed circuit board comprises a metal substrate, a circuit layer and an insulating layer clamped between the metal substrate and the circuit layer, wherein circuit wires connected to the light source are distributed on the circuit layer;
the flexible circuit board is provided with a connecting circuit, and the connecting circuit is electrically connected with the corresponding circuit wires on the circuit layer to form a conductive circuit from the light source to the external light source driver.
Preferably, in the above-described backlight assembly,
the flexible circuit board comprises a substrate film layer, a copper foil layer and an adhesive layer clamped between the substrate film and the copper foil layer, and the connecting circuit is arranged in the copper foil layer.
Preferably, in the above-described backlight assembly,
the flexible circuit board with the light-emitting strip main part links to each other, specifically does:
the flexible circuit board and the metal-based printed circuit board are bonded together by a lamination process.
Preferably, in the above-described backlight assembly,
the metal-based printed circuit board is an aluminum substrate, and the light source is a light emitting diode.
The utility model also provides a display device, including liquid crystal display panel, still include as above backlight unit.
From the foregoing, it can be seen that the utility model provides a light-emitting strip, backlight unit and display device through the adoption have metal base printed circuit board's light-emitting strip main part and the flexible circuit board design of easily wiring processing, has realized better radiating effect, has made things convenient for the wiring design simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a light-emitting strip according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a connection between the light-emitting strip main body and the flexible circuit board according to an embodiment of the present invention;
fig. 3 is another schematic diagram of the connection between the light-emitting strip main body and the flexible circuit board according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a backlight assembly according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, an embodiment of the present invention provides a light-emitting strip, which is shown in fig. 1, and includes:
the light-emitting strip comprises a light-emitting strip main body 11, wherein the light-emitting strip main body 11 can be a metal-based printed circuit board, and a plurality of light sources 12 are arranged on the metal-based printed circuit board;
and the flexible circuit board 13, wherein the flexible circuit board 13 is connected with the light-emitting strip main body 11.
Specifically, the metal-based printed circuit board may adopt an aluminum substrate or other metal or alloy substrate as a substrate layer, and the light source 12 may be a light emitting diode, and usually a plurality of light emitting diodes are disposed on one light emitting strip.
In fig. 1, the flexible wiring board 13 extends from one end of the light bar body 11 in a direction parallel to the light bar body 11. Of course, the flexible wiring board 13 may also be connected to the light bar body 11 in a manner perpendicular to the light bar body 11.
Referring to fig. 2, the light-emitting strip body 11 of the present embodiment includes a metal substrate 111, a circuit layer 113, and an insulating layer 112 sandwiched between the metal substrate 111 and the circuit layer 113, wherein a circuit trace (not shown in the figure) connected to the light source 12 is disposed on the circuit layer 113.
A connection circuit (not shown) is disposed on the flexible circuit board 13, and the connection circuit is electrically connected to the corresponding circuit trace on the circuit layer to form a conductive circuit from the light source to the external light source driver.
In the above structure, since the metal substrate 111 is adopted as the substrate layer for the light-emitting strip main body 11, the heat generated by the light source 12 is dissipated by utilizing the characteristic that metal has good thermal conductivity, and a good heat dissipation effect can be obtained.
With reference to fig. 2, the flexible printed circuit 13 includes a substrate film layer 131, a copper foil layer 133, and an adhesive layer 132 sandwiched between the substrate film 131 and the copper foil layer 133, and the connection circuit is disposed in the copper foil layer 133.
In addition, the structure adopts the flexible circuit board 13 as the wire outlet end of the light emitting strip main body 11, one end of the flexible circuit board is connected to the peripheral light source driver, and the other end of the flexible circuit board is connected to the light emitting strip main body 11, so that a conductive path from the light source driver to the light source is realized. The flexible wiring board 13 has the following advantages as an outlet terminal:
1) in the prior art, the wire outlet end of the light emitting strip main body is usually provided with a bonding pad or a connector to lead out a conductive circuit, obviously, the bonding pad and the connector need to occupy a larger space, and when the width of the light emitting strip is limited (usually, several millimeters) and the wire outlet end has more conductive paths, the design of the bonding pad or the connector can obviously increase the wiring difficulty (usually, only 2-4 lines can be led out) and the thickness of a panel. And the electric connection between flexible line way board 13 and light emitting strip main part 11 in this embodiment can be formed by connecting the conducting circuit that forms in the PCB platemaking process to need not set up pad or connector at the outlet terminal of light emitting strip main part 11, consequently convenient wiring and be favorable to panel thickness control.
2) Meanwhile, the flexible circuit board 13 has advantages of small thickness, being bendable and the like, which further facilitates wiring and facilitates control of panel thickness.
In summary, it can be seen that the present embodiment is particularly suitable for the illumination field and the large-sized display device requiring the heat dissipation design. For example, in a large-sized display device, it is generally desirable to realize area light control, that is, a greater number of light-emitting bars are used, and the lighting of the light sources on each light-emitting bar can be independently controlled, so that the number of wire-out ends of the light-emitting bars will increase, and the wiring difficulty will also increase significantly. The adoption of the structure of the embodiment can help to realize the regional light control function.
How the light bar main body 11 and the flexible wiring board 13 described in this embodiment are manufactured and connected to each other will be further described below.
In this embodiment, the light bar body 11 and the flexible circuit board 13 may be made by separately blanking, wherein the driving circuit on the light bar body 11 and the connecting circuit on the flexible circuit board 13 are formed by electroplating and then etching. Generally, a metal film may be formed by electroplating, and a pattern having a predetermined shape may be etched on the metal film to obtain a specific circuit. After the etching is finished, the circuit structure can be protected through a covering film pressing treatment process.
After the flexible circuit board 13 and the light-emitting strip main body 11 are obtained respectively, a side edge of the light-emitting strip main body 11 and a side edge of the flexible circuit board 13 may be bonded together through a lamination process, specifically, corresponding layers may be connected together, that is, a side edge of the substrate film layer 131 is connected with a side edge of the metal substrate 111; the side edges of the adhesive layer 132 are connected to the side edges of the insulating layer 112; and the side of the copper foil layer 133 is connected to the side of the wiring layer 113.
As shown in fig. 3, during the lamination process, the soft and hard combining portion 14 of the flexible circuit board 13 and the light-emitting strip main body 11 may be subjected to routing process, so that the combining surface becomes rough, which is beneficial to improving the bonding strength; then, the side of the flexible circuit board 13 and the side of the light-emitting strip main body 11 are tightly combined through a lamination process, so that the driving circuit 1131 on the light-emitting strip main body 11 and the corresponding connecting circuit 1331 on the flexible circuit board 13 are electrically connected. Then carrying out solder mask treatment on the joint so as to insulate the metal circuit; and then, the connection between the flexible circuit board 13 and the light-emitting strip body 11 can be completed by performing subsequent surface treatment (such as cleaning, drying and the like).
The present embodiment also provides a backlight assembly in a liquid crystal display, which includes a light guide plate 15, a light emitting strip 10 at a side of the light guide plate, and a back plate 16 under the light guide plate, as shown in fig. 4. The specific structure of the light-emitting strip 10 is shown in fig. 1 to 3 and is not described herein again.
The present embodiment also provides a display device including a liquid crystal display panel and further including a backlight assembly shown in fig. 4. The display device can be any product or component needing a backlight component, such as a liquid crystal display, a liquid crystal television, a mobile phone, a tablet personal computer and the like.
In summary, the light-emitting strip, the backlight assembly and the display device provided by the embodiment adopt the light-emitting strip main body with the metal-based printed circuit board and the flexible circuit board design easy for wiring treatment, so that a better heat dissipation effect is realized, and meanwhile, the wiring design is facilitated.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201465572U CN202493967U (en) | 2012-03-31 | 2012-03-31 | Light emitting strip, backlight component and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201465572U CN202493967U (en) | 2012-03-31 | 2012-03-31 | Light emitting strip, backlight component and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202493967U true CN202493967U (en) | 2012-10-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201465572U Expired - Lifetime CN202493967U (en) | 2012-03-31 | 2012-03-31 | Light emitting strip, backlight component and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202493967U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197448A (en) * | 2013-01-08 | 2013-07-10 | 友达光电股份有限公司 | Transmission substrate, display device using the same, and method for assembling display device |
| CN104110605A (en) * | 2013-04-16 | 2014-10-22 | 深圳金立翔视效科技有限公司 | LED module and display screen applying same |
| TWI561898B (en) * | 2014-01-28 | 2016-12-11 | Radiant Opto Electronics Corp | Light source module and lamp |
| CN111197705A (en) * | 2018-11-20 | 2020-05-26 | 上海祁仁光电科技有限公司 | Ultra-fine LED flexible luminous strip |
| CN115586671A (en) * | 2022-09-28 | 2023-01-10 | 苏州华星光电技术有限公司 | A kind of backlight module and display device |
-
2012
- 2012-03-31 CN CN2012201465572U patent/CN202493967U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197448A (en) * | 2013-01-08 | 2013-07-10 | 友达光电股份有限公司 | Transmission substrate, display device using the same, and method for assembling display device |
| CN103197448B (en) * | 2013-01-08 | 2015-07-08 | 友达光电股份有限公司 | Transmission substrate, display device using the same, and method for assembling display device |
| CN104110605A (en) * | 2013-04-16 | 2014-10-22 | 深圳金立翔视效科技有限公司 | LED module and display screen applying same |
| TWI561898B (en) * | 2014-01-28 | 2016-12-11 | Radiant Opto Electronics Corp | Light source module and lamp |
| CN111197705A (en) * | 2018-11-20 | 2020-05-26 | 上海祁仁光电科技有限公司 | Ultra-fine LED flexible luminous strip |
| CN115586671A (en) * | 2022-09-28 | 2023-01-10 | 苏州华星光电技术有限公司 | A kind of backlight module and display device |
| CN115586671B (en) * | 2022-09-28 | 2024-12-03 | 苏州华星光电技术有限公司 | Backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |