CN102252217B - Backlight module with double-side light-emitting structure and display device - Google Patents
Backlight module with double-side light-emitting structure and display device Download PDFInfo
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- CN102252217B CN102252217B CN2010101785612A CN201010178561A CN102252217B CN 102252217 B CN102252217 B CN 102252217B CN 2010101785612 A CN2010101785612 A CN 2010101785612A CN 201010178561 A CN201010178561 A CN 201010178561A CN 102252217 B CN102252217 B CN 102252217B
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Abstract
The invention discloses a backlight module with a double-side light-emitting structure and a display device. The backlight module comprises a flexible circuit board and a plurality of light emitting diodes; the flexible circuit board comprises a conductive layer and an insulation layer which covers the conductive layer; and the plurality of light emitting diodes are respectively arranged at two sides of the flexible circuit board and are electrically connected to the conductive layer of the flexible circuit board respectively; and the plurality of light emitting diodes are used for emitting light towards two sides of the flexible circuit board. The backlight module with the double-side light-emitting structure, disclosed by the invention, can be used for improving the disadvantages of performance limit and environment pollution caused by using a cold-cathode tube as a backlight source of the double-side backlight module, and has the advantages of lower manufacturing cost and thinner assembling thickness; moreover, as the flexible circuit board has flexibility, a weaving structure can be displayed between the flexible circuit board and a metal back board, and a good heat radiating effect can be provided synchronously.
Description
Technical field
The present invention relates to a kind of backlight module and display unit with double-side light-emitting structure, espespecially a kind of a plurality of light emitting diodes are arranged at respectively the both sides of flexible circuit board, to reach two-sided backlight module and the display unit that goes out light effect.
Background technology
Because liquid crystal itself can't be luminous, so backlight module is the key part and component for display panels, and its major function just fully reaches the light source that is evenly distributed in supply brightness, so that the normal show image of display panels.And along with panel of LCD has been widely used in the electronic product of numerous tool growth potentiality, such as monitor, notebook computer, digital camera, projector etc., the demand of backlight module and relevant spare part thereof is also in the Sustainable Growth.And the application of light emitting diode constantly is developed in recent years.Light emitting diode belongs to chemiluminescence, have the advantages such as power consumption is low, component life long, need not warm up the lamp time, reaction speed is fast, add that its volume is little, vibration resistance, be fit to volume production, the fit applications demand is made the advantages such as element of minimum or array easily, is the required light source of backlight module so light emitting diode has been widely used now.
In general, backlight module with double-side light-emitting structure can be applied in the products such as LCD TV and notebook computer, more can be applicable to the outdoor displaying devices such as large-scale billboard, its advantage is that two display floaters can share one group of backlight module and just can reach the double-sided display effect, and existing light-negative module with double face adopts cold-cathode tube (CCFL) as its light source mostly, yet cold-cathode tube has color rendering not good, need high driving voltage, mercurous (Hg) can cause environmental pollution, luminous frequency spectrum contains ultraviolet light (UV) wave band, toggle speed is slow, fluorescent tube easily breaks, and colourity control is difficult for waiting shortcomings, so just be used for improving the problems referred to above with light emitting diode as the application of light-negative module with double face backlight.See also Fig. 1, Fig. 1 is the schematic diagram of prior art light-negative module with double face 10, and light-negative module with double face 10 includes two light-emitting diode light bars 12, and each light-emitting diode light bar 12 includes substrate 14, and a plurality of light emitting diode 16, and it is arranged on the substrate 14.Substrate 14 is generally aluminium base or glass mat, be used for thus carrying a plurality of light emitting diodes 16, and in order to reach the two-sided back light effect, light-negative module with double face 10 needs the light-emitting diode light bar 12 of twice, so just cause the increase of manufacturing cost and package thickness, and aluminium base or glass mat need to additionally arrange wire and be connected in dc source, provide thus light-emitting diode light bar 12 required electric power, have also increased extraly the element cost.Moreover; in order to strengthen the radiating effect of light-negative module with double face 10; usually can between two light-emitting diode light bars 12, set up metal backing 18; and two light-emitting diode light bars, 12 Pastings are in the both sides of metal backing 18; a plurality of light emitting diodes 16 except two light-emitting diode light bars 12 produce so metal backing 18 can fall apart heat, but set up the increase that metal backing 18 can cause again overall package thickness.Therefore how designing a kind of low manufacturing cost and mechanism less two-sided bright dipping backlight module that takes up room that has, just is the problem of the required effort of display mechanism design now.
Summary of the invention
The invention provides a kind of backlight module and display unit with double-side light-emitting structure, to solve the above problems.
The present invention discloses a kind of backlight module with double-side light-emitting structure, and it includes flexible circuit board, and it includes conductive layer, and insulating barrier, and it is coated on this conductive layer; And a plurality of light emitting diodes, this conductive layer that it is arranged at respectively the both sides of this flexible circuit board and is electrically connected on respectively this flexible circuit board, these a plurality of light emitting diodes are to emit beam towards the both sides of this flexible circuit board respectively.
The present invention discloses in addition this backlight module and comprises in addition at least one conducting strip, and it is arranged between this conductive layer and this light emitting diode of this flexible circuit board.
The present invention discloses in addition this backlight module and comprises in addition support member, and it is connected in this flexible circuit board, and this support member is to support this flexible circuit board.
It is metal backing that the present invention discloses this support member in addition, and it is used for the loose heat that produces except these a plurality of light emitting diodes.
The present invention discloses in addition and is formed with at least one fluting on this support member, and this flexible circuit board is arranged in this at least one fluting, so that these a plurality of light emitting diodes are arranged at respectively the both sides of this support member.
The present invention discloses a kind of display unit with double-side light-emitting structure in addition, it includes shell, two panels unit, it is installed on respectively in this shell and backlight module, it is installed in this shell and is arranged between this two panels unit, and this backlight module is to be used to provide the required light source in this two panels unit.This backlight module includes flexible circuit board, and it includes conductive layer, and insulating barrier, and it is coated on this conductive layer; And a plurality of light emitting diodes, this conductive layer that it is arranged at respectively the both sides of this flexible circuit board and is electrically connected on respectively this flexible circuit board, these a plurality of light emitting diodes are to emit beam towards the both sides of this flexible circuit board respectively, provide respectively thus this two panels unit required light source.
Description of drawings
Fig. 1 is the schematic diagram of prior art light-negative module with double face.
Fig. 2 is the schematic appearance of preferred embodiment of the present invention display unit.
Fig. 3 is the subelement exploded perspective view of preferred embodiment of the present invention display unit.
Fig. 4 is the schematic appearance of preferred embodiment of the present invention backlight module.
Fig. 5 is the schematic side view of preferred embodiment of the present invention backlight module.
Fig. 6 is the schematic side view of another embodiment of the present invention backlight module.
Description of reference numerals
10 light-negative module with double faces, 12 light-emitting diode light bars
14 substrates, 16 light emitting diodes
18 metal backings
50 display unit, 52 shells
54 panel units, 56 backlight modules
58 reflector plates, 60 flexible circuit boards
601 conductive layers, 602 look edge layers
62 light emitting diodes, 64 connectors
66 support members, 661 flutings
68 conducting strips
The specific embodiment
See also Fig. 2 and Fig. 3, Fig. 2 is the schematic appearance that the preferred embodiment of the present invention has the display unit 50 of double-side light-emitting structure, and Fig. 3 is the subelement exploded perspective view of preferred embodiment of the present invention display unit 50.Display unit 50 includes shell 52, and it can be comprised of plastic material, and shell 52 is to coat inner member; Display unit 50 includes two panels unit 54 in addition, it is installed on respectively in the shell 52, each panel unit 54 can include optical material layer and display panels etc., wherein optical material layer can be used to light is further atomized and optically focused, to provide this display panels evenly to face the light source of angular brightness with height, optical material layer can include the optical elements such as prismatic lens (prism sheet), diffusion disk (diffuser).Display unit 50 includes backlight module 56 in addition, it is installed in the shell 52 and is arranged between the two panels unit 54, backlight module 56 is to be used to provide the required light source in two panels unit 54, that is to say that backlight module 56 can be respectively towards the two panels unit of its both sides 54 emission of lights; And display unit 50 optionally includes two reflector plates (reflector sheet) 58 in addition, it is installed on respectively between two panels unit 54 and the backlight module 56, reflector plate 58 can be used to light reflection to increase thus the utilization rate of light to panel unit 54.
See also Fig. 4 and Fig. 5, Fig. 4 is the schematic appearance of preferred embodiment of the present invention backlight module 56, Fig. 5 is the schematic side view of preferred embodiment of the present invention backlight module 56, backlight module 56 includes at least one flexible circuit board 60, each flexible circuit board 60 includes conductive layer 601, it can be copper foil material, and flexible circuit board 60 includes insulating barrier 602 in addition, and it is coated on conductive layer 601; Backlight module 56 includes a plurality of light emitting diodes 62 in addition, the conductive layer 601 that it is arranged at respectively the both sides of flexible circuit board 60 and is electrically connected on respectively flexible circuit board 60, a plurality of light emitting diodes 62 are to emit beam towards the both sides of flexible circuit board 60 respectively, provide respectively thus two panels unit 54 required light source, wherein an end of each flexible circuit board 60 can be connected in connector 64, receive thus a plurality of light emitting diode 62 luminous required dc sources, because flexible circuit board 60 itself is tool wire function, and it only is one group of light-emitting diode light bar, one group of control circuit board gets final product so only need arrange in pairs or groups, so can save the element manufacturing cost compared to prior art.In addition, backlight module 56 comprises support member 66 in addition, and it is connected in flexible circuit board 60, and support member 66 is to support flexible circuit board 60, and the planar structure intensity of flexible circuit board 60 is provided thus.In this embodiment, be formed with at least one fluting 661 on the support member 66, and each flexible circuit board 60 is arranged in respectively corresponding fluting 661, so that a plurality of light emitting diodes 62 on it can be arranged at respectively the both sides of support member 66, that is to say because the pliability of flexible circuit board 60, so can make 66 of flexible circuit board 60 and support members present braiding shape structure, but a plurality of light emitting diodes 62 just are arranged at the both sides of support member 66 in the compartment of terrain thus.Interval as for the fluting 661 of the magnitude setting of flexible circuit board 60 and the fluting 661 of support member 66, support member 66, and the distance of each flexible circuit board 60 can be not limited to shown in the present embodiment figure, and the arrangement mode that the braiding angulation that flexible circuit board 60 and support member are 66 and light emitting diode 62 compartment of terrains are arranged at support member 66 both sides does not also limit to shown in the present embodiment figure, looks closely the actual design demand and decides.In addition, in order to promote the radiating efficiency of backlight module 56, support member 66 can be metal backing, it is used for the loose heat that produces except a plurality of light emitting diodes 62, and backlight module 56 can comprise at least one conducting strip (thermal pad) 68 in addition, it is arranged between the conductive layer 601 and light emitting diode 62 of flexible circuit board 60, the heat that thus light emitting diode 62 is produced conducts to this metal backing, conducting strip 68 is except having heat-conducting effect, it also can have viscosity, so conducting strip 68 can be fixed on flexible printed wiring board 60 on the support member 66.
In addition, the support member of backlight module of the present invention and conducting strip can be optionally configuration, see also Fig. 6, Fig. 6 is the schematic side view of another embodiment of the present invention backlight module 56, a plurality of light emitting diodes 62 are arranged at respectively the both sides of flexible circuit board 60 and are directly connected in the conductive layer 601 of flexible circuit board 60 in this embodiment, and the configuration of having omitted support member and conducting strip, a plurality of light emitting diodes 62 also are used for emitting beam towards the both sides of flexible circuit board 60 respectively, provide respectively thus two panels unit 54 required light source, its action principle is same as previous embodiment, just no longer describes in detail at this.
Compared to prior art, backlight module provided by the present invention and display unit are arranged at a plurality of light emitting diodes respectively the both sides of flexible circuit board, the required light source in two panels unit is provided respectively thus and reaches the two-sided light effect that goes out, it can improve with cold-cathode tube as the performance limitations of light-negative module with double face backlight and the shortcoming that causes environmental pollution, and it has the thinner advantage of low manufacturing cost and package thickness; Moreover since the pliability of flexible circuit board present braiding shape structure between flexible circuit board and metal backing so can make, and good radiating effect be provided simultaneously.
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of doing according to claim of the present invention all should belong to the covering scope of patent of the present invention.
Claims (10)
1. backlight module with double-side light-emitting structure, it includes:
Flexible circuit board, it includes conductive layer, and insulating barrier, and it is coated on this conductive layer; And
A plurality of light emitting diodes, this conductive layer that it is arranged at respectively the two side ends of this flexible circuit board and is electrically connected on respectively this flexible circuit board, these a plurality of light emitting diodes are to emit beam towards the two side ends of this flexible circuit board respectively.
2. backlight module as claimed in claim 1, it comprises at least one conducting strip in addition, and it is arranged between this conductive layer and this light emitting diode of this flexible circuit board.
3. backlight module as claimed in claim 1, it comprises support member in addition, and it is connected in this flexible circuit board, and this support member is used for supporting this flexible circuit board.
4. backlight module as claimed in claim 3, wherein this support member is metal backing, it is used for the loose heat that produces except these a plurality of light emitting diodes.
5. such as claim 3 or 4 described backlight modules, wherein be formed with at least one fluting on this support member, this flexible circuit board is arranged in this at least one fluting, so that these a plurality of light emitting diodes are arranged at respectively the two sides of this support member.
6. display unit with double-side light-emitting structure, it includes:
Shell;
The two panels unit, it is installed on respectively in this shell; And
Backlight module, it is installed in this shell and is arranged between this two panels unit, and this backlight module is to be used to provide the required light source in this two panels unit, and this backlight module includes:
Flexible circuit board, it includes conductive layer, and insulating barrier, and it is coated on this conductive layer; And
A plurality of light emitting diodes, this conductive layer that it is arranged at respectively the two side ends of this flexible circuit board and is electrically connected on respectively this flexible circuit board, these a plurality of light emitting diodes are to emit beam towards the two side ends of this flexible circuit board respectively, provide respectively thus this two panels unit required light source.
7. display unit as claimed in claim 6, wherein this backlight module comprises at least one conducting strip in addition, and it is arranged between this conductive layer and this light emitting diode of this flexible circuit board.
8. display unit as claimed in claim 6, wherein this backlight module comprises support member in addition, and it is connected in this flexible circuit board, and this support member is to support this flexible circuit board.
9. display unit as claimed in claim 8, wherein this support member is metal backing, it is used for the loose heat that produces except these a plurality of light emitting diodes.
10. display unit as claimed in claim 8 or 9 wherein is formed with at least one fluting on this support member, and this flexible circuit board is arranged in this at least one fluting, so that these a plurality of light emitting diodes are arranged at respectively the two sides of this support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101785612A CN102252217B (en) | 2010-05-21 | 2010-05-21 | Backlight module with double-side light-emitting structure and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101785612A CN102252217B (en) | 2010-05-21 | 2010-05-21 | Backlight module with double-side light-emitting structure and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102252217A CN102252217A (en) | 2011-11-23 |
| CN102252217B true CN102252217B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101785612A Active CN102252217B (en) | 2010-05-21 | 2010-05-21 | Backlight module with double-side light-emitting structure and display device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399429A (en) * | 2013-07-30 | 2013-11-20 | 深圳市华星光电技术有限公司 | Double-side display |
| US9521885B2 (en) | 2014-05-30 | 2016-12-20 | Apple Inc. | Woven display |
| US9523884B2 (en) | 2014-06-24 | 2016-12-20 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Direct type backlight module unit of dual-side liquid crystal display device |
| CN104061495B (en) * | 2014-06-24 | 2016-09-14 | 深圳市华星光电技术有限公司 | Downward back photo structure for double-sided display |
| CN106716654A (en) * | 2014-09-17 | 2017-05-24 | 飞利浦照明控股有限公司 | Flexible light emitting device |
| JP2018185396A (en) * | 2017-04-25 | 2018-11-22 | 株式会社Ｋ工房 | LED display |
| CN109377894A (en) * | 2018-11-14 | 2019-02-22 | 陈晓锋 | A kind of ultra-thin soft display module of Fast Installation modularization |
| US11608947B2 (en) | 2019-09-19 | 2023-03-21 | Beijing Boe Optoelectronics Technology Co., Ltd. | Light bar, backlight assembly and display device |
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| JP2003036715A (en) * | 2001-07-23 | 2003-02-07 | Toshiba Corp | Surface light source device and liquid crystal display device |
| TW573170B (en) * | 2002-10-11 | 2004-01-21 | Toppoly Optoelectronics Corp | Dual-sided display liquid crystal panel |
| US6721022B1 (en) * | 2002-11-14 | 2004-04-13 | Wintek Corporation | Liquid crystal display with electro-luminescent cell having a double-face backlight effect |
| CN1687830A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure and its light source module |
| CN101706075A (en) * | 2009-12-07 | 2010-05-12 | 友达光电股份有限公司 | Display device with double-sided display function and backlight module thereof |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003036715A (en) * | 2001-07-23 | 2003-02-07 | Toshiba Corp | Surface light source device and liquid crystal display device |
| TW573170B (en) * | 2002-10-11 | 2004-01-21 | Toppoly Optoelectronics Corp | Dual-sided display liquid crystal panel |
| US6721022B1 (en) * | 2002-11-14 | 2004-04-13 | Wintek Corporation | Liquid crystal display with electro-luminescent cell having a double-face backlight effect |
| CN1687830A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure and its light source module |
| CN101706075A (en) * | 2009-12-07 | 2010-05-12 | 友达光电股份有限公司 | Display device with double-sided display function and backlight module thereof |
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| CN102252217A (en) | 2011-11-23 |
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