CN102287708A - Display device and backlight module thereof - Google Patents
Display device and backlight module thereof Download PDFInfo
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- CN102287708A CN102287708A CN201110215106XA CN201110215106A CN102287708A CN 102287708 A CN102287708 A CN 102287708A CN 201110215106X A CN201110215106X A CN 201110215106XA CN 201110215106 A CN201110215106 A CN 201110215106A CN 102287708 A CN102287708 A CN 102287708A
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- circuit board
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- backlight module
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- 238000004020 luminiscence type Methods 0.000 claims description 43
- 239000004020 conductor Substances 0.000 claims description 38
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011469 building brick Substances 0.000 description 2
- 101001045744 Sus scrofa Hepatocyte nuclear factor 1-beta Proteins 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a display device and a backlight module thereof, wherein the display device comprises a display panel with a pixel array and the backlight module which is used for providing a backlight source to cooperate with the pixel array to present a picture. The backlight module comprises a back plate, at least one light-emitting unit, a first circuit board and a second circuit board. The at least one light-emitting unit is arranged on the surface of the back plate facing the display panel. The first circuit board is provided with at least one current bus unit, and each current bus unit is electrically connected with the corresponding light-emitting unit. The second circuit board is provided with a direct current/direct current converter electrically connected with at least one current confluence unit.
Description
Technical field
The present invention relates to a kind of display unit and backlight module thereof, refer to a kind of display unit especially and can reduce the backlight module of board area demand.
Background technology
Flat display apparatus (Flat Panel Display; FPD) be present widely used display, advantage such as it has, and external form is frivolous, power saving and low radiation is so be widely used on the electronic products such as computer screen, mobile phone, PDA(Personal Digital Assistant), flat-surface television.The operation principle of flat display apparatus is for cooperating light source that backlight module provided with show image by the light transmission that changes pixel.That is backlight module is that flat display apparatus is carried out the critical components that shows running.Fig. 1 is the schematic diagram of known backlit module.As shown in Figure 1, known backlit module 100 comprises backboard 101, be arranged at a plurality of luminescence unit (not shown)s of the first plate face of backboard 101 and the printed circuit board (PCB) 110 that is arranged at the second plate face of backboard 101, and wherein printed circuit board (PCB) 110 has a plurality of electric currents conflux (current sink) unit 111 and DC-DC converter 112.A plurality of luminescence units are by conductor wire 190, for example soft arranging wire (Flexible Flat Cable; FFC) be connected to printed circuit board (PCB) 110, backboard 101 has a plurality of openings 120 usually, and each conductor wire 190 promptly passes corresponding opening 120 to connect printed circuit board (PCB) 110 and corresponding luminescence unit.Yet along with the increasing of size of display panels, the number of conductor wire 190 can increase because of the increase of luminescence unit quantity, in addition, arranges for cooperating luminescence unit, so the area of printed circuit board (PCB) 110 will significantly strengthen thereupon, so can cause high production cost.In addition, unit 111 takies too much space with the printed circuit board (PCB) 110 of DC-DC converter 112 at the second plate face of backboard 101 if the tool electric current confluxes, circuit board that then can other functional unit of limit tool the space is set, cause design inconvenience.
Summary of the invention
According to embodiments of the invention, a kind of backlight module is disclosed, it comprises a backboard, at least one luminescence unit, a first circuit board and a second circuit board.This at least one luminescence unit is arranged at a plate face of this backboard.This first circuit board has at least one electric current unit that confluxes, and each electric current unit that confluxes is electrically connected on corresponding luminescence unit.This second circuit board has one and is electrically connected on the conflux DC-DC converter of unit of this at least one electric current.
According to embodiments of the invention, a kind of display unit is disclosed, it comprises a display floater and with pel array and is used to provide backlight presents picture with the cooperation pel array backlight module.This backlight module comprises a backboard, at least one luminescence unit, a first circuit board and a second circuit board.This at least one luminescence unit is arranged at the plate face towards this display floater of this backboard.This first circuit board has at least one electric current unit that confluxes, and each electric current unit that confluxes is electrically connected on corresponding luminescence unit.This second circuit board has and is electrically connected on the conflux DC-DC converter of unit of this at least one electric current.
The present invention is arranged at various boards respectively with the board area that avoids waste with conflux unit and DC-DC converter of at least one electric current, thereby reduces production costs, and can vacate more plate space of planes so that the circuit board of other functional unit of tool conveniently to be set.
Description of drawings
Fig. 1 is the schematic diagram of known backlit module;
Fig. 2 is the basic framework schematic diagram of display unit of the present invention;
Fig. 3 is the first embodiment schematic top plan view of the backlight module of Fig. 2;
Fig. 4 is the first embodiment elevational schematic view of the backlight module of Fig. 2;
Fig. 5 is the generalized section along the A-A line among Fig. 4;
Fig. 6 is the second embodiment schematic top plan view of the backlight module of Fig. 2;
Fig. 7 is the second embodiment elevational schematic view of the backlight module of Fig. 2;
Fig. 8 is the 3rd an embodiment elevational schematic view of the backlight module of Fig. 2.
Wherein, Reference numeral
The specific embodiment
Hereinafter, cooperate appended accompanying drawing to elaborate, but the embodiment that is provided not is the scope that contains in order to restriction the present invention especially exemplified by embodiment according to display unit of the present invention and backlight module thereof.
Fig. 2 is the basic framework schematic diagram of display unit of the present invention.As shown in Figure 2, display unit 200 comprises display floater 210 and backlight module 230, and wherein display floater 210 has pel array 215, and backlight module 230 is used to provide backlight and presents picture to cooperate pel array 215.First embodiment that Fig. 3 and Fig. 4 are respectively the backlight module 230 of Fig. 2 overlooks and elevational schematic view, and Fig. 5 is the generalized section along the A-A line among Fig. 4.As Fig. 3～shown in Figure 5, backlight module 230_1 comprises backboard 240, at least one first luminescence unit 251, at least one first conductor wire 291, first circuit board 260, second circuit board 270, second conductor wire 292 and the 4th circuit board 275.Backboard 240 has towards the first plate face 241 of the display floater 210 of Fig. 2 and is in reverse to the second plate face 242 of the first plate face 241.At least one first luminescence unit 251 is arranged at the first plate face 241 of backboard 240.First circuit board 260, second circuit board 270 and the 4th circuit board 275 are arranged at the second plate face 242 of backboard 240, circuit board can for example be printed circuit board (PCB) (Printed Circuit Board, PCB), flexible printed wiring board (Flexible Printed Circuit Board, FPCB).
A ball bearing made using is only had in unit 261 because each first electric current confluxes, so can be arranged at quite little circuit board space, and cooperate the conflux designed first circuit board 260 of alignment placement of unit 261 of at least one first electric current, just can only take narrow fringe region at the second plate face 242 of backboard 240.First DC-DC converter 271 of second circuit board 270 can be electrically connected to first circuit board 260 by second conductor wire 292, again by the electric conduction routing on the first circuit board 260 transmission power supply to each first electric current unit 261 that confluxes.In addition, second circuit board 270 only need provide the required area of circuit of layout first DC-DC converter 271 basically, thus the length/width of second circuit board 270 can be significantly less than the length/width of backboard 240.That is, at least one first electric current that is arranged at the second plate face 242 of backboard 240 conflux the required board area of unit 261 and first DC-DC converter 271 can be significantly less than the area of above-mentioned known printed circuit board (PCB) 110.In other words, the framework of backlight module 231_1 of the present invention can avoid known technology that conflux unit 111 of electric current is arranged at same printed circuit board (PCB) 110 and significantly wastes board area with DC-DC converter 112, reduce production costs according to this, and can save the circuit board (such as four circuit board 275 of tool power supply unit 276) of space so that other functional unit of tool conveniently to be set of the second plate face 242.
Second embodiment that Fig. 6 and Fig. 7 are respectively the backlight module 230 of Fig. 2 overlooks and elevational schematic view.As Fig. 6 and shown in Figure 7, backlight module 230_2 comprises backboard 340, at least one first luminescence unit 251, at least one second luminescence unit 252, at least one first conductor wire 291, at least one the 3rd conductor wire 293, first circuit board 260, second circuit board 270, tertiary circuit plate 280, second conductor wire 292, the 4th conductor wire 294 and the 4th circuit board 275.Backboard 340 has towards the first plate face 341 of the display floater 210 of Fig. 2 and is in reverse to the second plate face 342 of the first plate face 341.At least one first luminescence unit 251 and at least one second luminescence unit 252 are arranged at the first plate face 341 of backboard 340.First circuit board 260, second circuit board 270, tertiary circuit plate 280 and the 4th circuit board 275 are arranged at the second plate face 342 of backboard 340.
Backlight module 230_2 is substantially similar to Fig. 3～backlight module 230_1 shown in Figure 5, and main difference is to comprise in addition at least one second luminescence unit 252, at least one the 3rd conductor wire 293, tertiary circuit plate 280 and the 4th conductor wire 294.Tertiary circuit plate 280 has at least one second electric current unit 281 that confluxes, and each second electric current unit 281 that confluxes is electrically connected on corresponding second luminescence unit 252 by corresponding the 3rd conductor wire 293.In Fig. 6 and embodiment shown in Figure 7, backboard 340 has at least one second opening 246, and each the 3rd conductor wire 293 promptly passes corresponding second opening 246 to connect corresponding second luminescence unit 252 and tertiary circuit plate 280.In another embodiment, backboard 340 can omit second opening 246, and each the 3rd conductor wire 293 is walked around backboard 340 lateral margins of contiguous tertiary circuit plate 280 to connect corresponding second luminescence unit 252 and tertiary circuit plate 280.The 4th conductor wire 294 is used for tertiary circuit plate 280 is connected to second circuit board 270, and the unit 281 that according to this at least one second electric current confluxed is electrically connected to first DC-DC converter 271.That is to say that at least one first electric current unit 261 and at least one second electric current unit 281 that confluxes that confluxes all is electrically connected to first DC-DC converter 271 of second circuit board 270.
In like manner, a ball bearing made using is only had in unit 281 because each second electric current confluxes, so can be arranged at quite little circuit board space, and cooperate the conflux designed tertiary circuit plate 280 of alignment placement of unit 281 of at least one second electric current, just can only take narrow fringe region at the second plate face 342 of backboard 340.Therefore, first circuit board 260 and tertiary circuit plate 280 are arranged at the narrow edge zone of two subtends of the second plate face 342.Based on above-mentioned explanation as can be known, at least one first electric current that is arranged at the second plate face 342 of backboard 340 conflux unit 261, at least one second electric current conflux the required board area of unit 281 and first DC-DC converter 271 still can be significantly less than the area of known printed circuit board (PCB) 110, reduce production costs according to this, and can save the circuit board (such as four circuit board 275 of tool power supply unit 276) of space so that other functional unit of tool conveniently to be set of the second plate face 342.
Fig. 8 is the 3rd an embodiment elevational schematic view of the backlight module 230 of Fig. 2.Backlight module 230_3 shown in Figure 8 is similar to Fig. 6 and backlight module 230_2 shown in Figure 7, and main difference is second circuit board 270 is replaced into second circuit board 370, and the 4th circuit board 275 is replaced into the 4th circuit board 375.The second circuit board 370 that is arranged at the second plate face 442 of backboard 440 has first DC-DC converter 371 and second DC-DC converter 372.First DC-DC converter 371 is electrically connected at least one first electric current unit 261 that confluxes by second conductor wire 292.Second DC-DC converter 372 is electrically connected at least one second electric current unit 281 that confluxes by the 4th conductor wire 294.The 4th circuit board 375 that is arranged at the second plate face 442 of backboard 440 has power supply unit 376, and power supply unit 376 is electrically connected on first DC-DC converter 371 and second DC-DC converter 372.Note that power supply unit 376 be not limited to power first DC-DC converter 371 and second DC-DC converter 372, other electronic building brick of the display unit 200 of the Fig. 2 that also can power.Because 370 need of second circuit board provide the required area of circuit of layout first DC-DC converter 371 and second DC-DC converter 372, so be arranged at least one first electric current of the second plate face 442 of backboard 440 unit 261 that confluxes, at least one second electric current unit 281 that confluxes, the required board area of first DC-DC converter 371 and second DC-DC converter 372 still can be significantly less than the area of above-mentioned known printed circuit board (PCB) 110, reduce production costs according to this, and can save the circuit board (such as four circuit board 375 of tool power supply unit 376) of space so that other functional unit of tool conveniently to be set of the second plate face 442.
Note that display unit of the present invention and backlight module thereof are not limited to above-mentioned structural design based at least one first luminescence unit and/or at least one second luminescence unit, and may extend to based on the conflux design of unit of more groups of electric currents of multi-group light-emitting unit matching more.In a word, the present invention is arranged at various boards respectively with the board area that avoids waste with conflux unit and DC-DC converter of at least one electric current, thereby reduce production costs, and can vacate more plate space of planes so that the circuit board of other functional unit of tool conveniently to be set.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (18)
1. backlight module is characterized in that it comprises:
One backboard has one first plate face;
At least one first luminescence unit is arranged at this first plate face;
One first circuit board, this first circuit board have at least one first electric current unit that confluxes and are electrically connected on this at least one first luminescence unit respectively; And
One second circuit board, this second circuit board have one first DC-DC converter and are electrically connected on this at least one first electric current unit that confluxes.
2. backlight module according to claim 1 is characterized in that, also comprises:
At least one first conductor wire, each first conductor wire are electrically connected between corresponding this at least one first luminescence unit and this first circuit board; And
One second conductor wire is electrically connected between this first circuit board and this second circuit board.
3. backlight module according to claim 2 is characterized in that, wherein this backboard also comprises second space of a whole page that is in reverse to this first plate face, and this first circuit board and this second circuit board are arranged at this second plate face.
4. backlight module according to claim 3 is characterized in that, wherein this at least one first conductor wire passes first luminescence unit and this first circuit board of at least one first opening to connect this correspondence of this backboard.
5. backlight module according to claim 3 is characterized in that, also comprises:
At least one second luminescence unit is arranged at this first plate face; And
One tertiary circuit plate is arranged at this second plate face, and this tertiary circuit plate has at least one second electric current unit that confluxes, and this at least one second electric current unit that confluxes is electrically connected on this second circuit board and is electrically connected on this at least one second luminescence unit respectively.
6. backlight module according to claim 5 is characterized in that, wherein this at least one second electric current unit that confluxes is electrically connected on this first DC-DC converter.
7. backlight module according to claim 5 is characterized in that, wherein this second circuit board also comprises one second DC-DC converter and is electrically connected on this at least one second electric current unit that confluxes.
8. backlight module according to claim 5 is characterized in that, also comprises:
At least one the 3rd conductor wire, each the 3rd conductor wire are electrically connected between corresponding second luminescence unit and this tertiary circuit plate; And
One the 4th conductor wire is electrically connected between this tertiary circuit plate and this second circuit board.
9. backlight module according to claim 8 is characterized in that, wherein this at least one the 3rd conductor wire passes one second opening of this backboard to connect this correspondence second luminescence unit and this tertiary circuit plate.
10. display unit is characterized in that it comprises:
One display floater has a pel array; And
One backlight module is used to provide backlight and presents picture to cooperate this pel array, and this backlight module comprises:
One backboard has first a plate face towards this display floater;
At least one first luminescence unit is arranged at this first plate face;
One first circuit board, this first circuit board have at least one first electric current unit that confluxes and are electrically connected on this at least one first luminescence unit respectively; And
One second circuit board, this second circuit board have one first DC-DC converter and are electrically connected on this at least one first electric current unit that confluxes.
11. display unit according to claim 10 is characterized in that, wherein this backlight module also comprises:
At least one first conductor wire, each first conductor wire are electrically connected between corresponding this at least one first luminescence unit and this first circuit board; And
One second conductor wire is electrically connected between this at least one first circuit board and this second circuit board.
12. display unit according to claim 11 is characterized in that, wherein:
This backlight module also comprises one the 4th circuit board, and the 4th circuit board has a power supply unit and is electrically connected on this first DC-DC converter; And
This backboard also comprises second a plate face that is in reverse to this first plate face, and this first circuit board, and this second circuit board and the 4th circuit board are arranged at this second plate face.
13. display unit according to claim 12 is characterized in that, wherein this at least one first conductor wire passes at least one first opening of this backboard to connect this correspondence first luminescence unit and this first circuit board.
14. display unit according to claim 12 is characterized in that, wherein this backlight module also comprises:
At least one second luminescence unit is arranged at this first plate face; And
One tertiary circuit plate is arranged at this second plate face, and this tertiary circuit plate has at least one second electric current unit that confluxes, and this at least one second electric current unit that confluxes is electrically connected on this second circuit board and is electrically connected on this at least one second luminescence unit respectively.
15. display unit according to claim 14 is characterized in that, wherein this at least one second electric current unit that confluxes is electrically connected on this first DC-DC converter.
16. display unit according to claim 14 is characterized in that, wherein this second circuit board also comprises one second DC-DC converter and is electrically connected on this power supply unit and this at least one second electric current unit that confluxes.
17. display unit according to claim 14 is characterized in that, wherein this backlight module also comprises:
At least one the 3rd conductor wire, each the 3rd conductor wire are electrically connected between corresponding second luminescence unit and this tertiary circuit plate; And
One the 4th conductor wire is electrically connected between this tertiary circuit plate and this second circuit board.
18. display unit according to claim 17 is characterized in that, wherein this at least one the 3rd conductor wire passes at least one second opening of this backboard to connect this correspondence second luminescence unit and this tertiary circuit plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100120762A TWI421838B (en) | 2011-06-14 | 2011-06-14 | Display apparatus and backlight module thereof |
| TW100120762 | 2011-06-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102287708A true CN102287708A (en) | 2011-12-21 |
| CN102287708B CN102287708B (en) | 2013-04-24 |
Family
ID=45334356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110215106XA Expired - Fee Related CN102287708B (en) | 2011-06-14 | 2011-07-26 | Display device and backlight module thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102287708B (en) |
| TW (1) | TWI421838B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750796A (en) * | 2008-12-09 | 2010-06-23 | 乐金显示有限公司 | Liquid crystal display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI220152B (en) * | 2003-12-15 | 2004-08-11 | Benq Corp | Liquid crystal display and backlight module thereof |
| KR101380305B1 (en) * | 2007-06-22 | 2014-04-03 | 삼성디스플레이 주식회사 | Backlight assembly |
| KR20090007006A (en) * | 2007-07-13 | 2009-01-16 | 삼성전자주식회사 | Liquid crystal display and manufacturing method thereof |
-
2011
- 2011-06-14 TW TW100120762A patent/TWI421838B/en not_active IP Right Cessation
- 2011-07-26 CN CN201110215106XA patent/CN102287708B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750796A (en) * | 2008-12-09 | 2010-06-23 | 乐金显示有限公司 | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201250660A (en) | 2012-12-16 |
| CN102287708B (en) | 2013-04-24 |
| TWI421838B (en) | 2014-01-01 |
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Granted publication date: 20130424 Termination date: 20200726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |