CN100371800C - Backlight module structure - Google Patents
Backlight module structure Download PDFInfo
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- CN100371800C CN100371800C CNB2005100779191A CN200510077919A CN100371800C CN 100371800 C CN100371800 C CN 100371800C CN B2005100779191 A CNB2005100779191 A CN B2005100779191A CN 200510077919 A CN200510077919 A CN 200510077919A CN 100371800 C CN100371800 C CN 100371800C
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- luminescence component
- interface end
- modular structure
- interface unit
- series connection
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Abstract
The present invention discloses a structure design of a back light module used for a flat panel display device. The structure design effectively adjusts luminous assembly arrays and control circuits thereof of the known technology. When the luminous assembly arrays are connected with the control circuits thereof, the increase of the number of the luminous assemblies which are connected in series is independent of the number of pins of connecting interface units defined by the present invention.
Description
Technical field
The present invention relates to a kind of design of structure of backlight unit, the particularly design of the annexation of light emitting array and control circuit thereof in this structure of backlight unit.
Background technology
Along with moving towards for the maximization of flat display apparatus such as LCD screen and the trend of slimming on the market, the size of display panel strengthens gradually, also make the size of its backlight module become big, need to increase more groups on the luminescence component array in its structure by light emitting diode (Light Emitting Diode, LED) the series connection luminescence component that waits luminescence component to form.Each group series connection luminescence component is then by composing in parallel its luminescence component array.In addition, each group series connection luminescence component need provide power supply connection pin to connect use in the main power supply of each group series connection luminescence component by a luminescence component connecting interface.In addition, each organizes the luminescence component of connecting also need be via above-mentioned luminescence component connecting interface, and one of luminescence component is controlled or the connection of drive signal connection pin is used to provide each group to connect respectively, respectively organizes series connection luminescence component with control or driving.
Fig. 1 is the synoptic diagram of the luminescence component array 11 in the LCD screen backlight module of above-mentioned known technology.Among the figure, luminescence component array 11 is composed in parallel with four groups of series connection luminescence components.Each is organized the luminescence component of each six light emitting diode of freely connecting and forms.Here, for more clearly demonstrating the connected mode in the known technology, each group is respectively defined as the first series connection luminescence component 111, the second series connection luminescence component 112, the 3rd series connection luminescence component 113 and the 4th series connection luminescence component 114.
Above-mentioned four groups of series connection luminescence components 111,112,113 and 114 are controlled by external power source and signal drive circuit thereof because of need, and its control signal link 1111,1121,1131 and 1141 of respectively organizing series connection luminescence component 111,112,113 and 114 is connected to the 2nd pin, the 3rd pin, the 4th pin and the 5th pin of a luminescence component connecting interface unit 115 control signal connection pin as luminescence component array 11 respectively.The 1st pin of above-mentioned luminescence component connecting interface unit 115 then can be used as a power supply and connects pin, and the power connector end 1112,1122,1132 of each group series connection luminescence component 111,112,113 and 114 and 1142 connection are provided.
Corresponding to the luminescence component connecting interface unit 115 described in Fig. 1, control circuit connecting interface unit 213 among Fig. 2 is used for making the control circuit structure 21 shown in Fig. 2 can provide a stabilized power source and drive signal to light emitting array 11 after above-mentioned luminescence component connecting interface unit 115 engages.
In Fig. 2, above-mentioned control circuit structure 21 comprises a power circuit unit 211 and a luminescence component driver element 212.Among the figure, power circuit unit 211 comprises a main power supply side VCC, an external power source drive signal DRV, an external control signal FB and power supply power supply output terminal OUTPUT.Power circuit unit 211 is in order to export a main power supply, said external power driving signal DRV can (Bipolar junction transistor, BJT) 2111 switch modules such as grade be controlled above-mentioned main power supply side VCC and whether are produced power supply in above-mentioned power supply power supply output terminal OUTPUT by control one bipolar junction transistor.Above-mentioned power supply power supply output terminal OUTPUT can be connected by the 1st pin of control circuit connecting interface unit 213 and luminescence component connecting interface unit 115, and a main power supply of luminescence component array 11 is provided.Moreover luminescence component driver element 212 is current lens unit, comprises three transistor chips 2121,2122 and 2123.These transistor chips 2121,2122 and 2123 comprise two transistors respectively.This current lens unit can be exported four groups of identical electric currents, and can control the value of its output current via this external control signal FB.This current lens unit comprises a reference current circuit and four replica current circuit, and wherein four replica current circuit output currents are identical with the reference current circuit output current.Label is the 1st pin that a wherein transistorized one source pole end 1C of 2121 transistor chip is connected to above-mentioned power supply power supply output terminal OUTPUT and control circuit connecting interface unit 213, forms a reference current circuit.Label is that two transistorized two source terminal 1C, 2C of 2122 transistor chip then are connected to control circuit connecting interface unit 213 the 2nd pin and the 3rd pin respectively, and a same electrical flow valuve of the first series connection luminescence component 111 and the second series connection luminescence component 112 is provided.In addition, label is that two transistorized two source terminal 1C, 2C of 2123 transistor chip then are connected to control circuit connecting interface unit 213 the 4th pin and the 5th pin respectively, and the above-mentioned same electrical flow valuve of the 3rd series connection luminescence component 113 and the 4th series connection luminescence component 114 is provided.
Above-mentioned each group series connection luminescence component 111,112,113 and 114 needs identical current value, and this all can have identical brightness in order to guarantee each light emitting diode in its series connection luminescence component 111,112,113 and 114.
In addition, one emitter terminal 1E of the transistor chip of label 2121 more can connect an outside chip for driving or processor by this external control signal FB, with control luminescence component driver element 212, and then control four groups of series connection luminescence components 111,112,113 and 114.
Yet,, decide the pin number of its luminescence component connecting interface unit and control circuit connecting interface unit in the backlight modular structure according to the group number of its luminescence component of connecting from above-mentioned known technology.With Fig. 1 is example, because of its backlight module has four groups of series connection luminescence components 111,112,113 and 114, additionally connects pin as power supply so its luminescence component connecting interface unit 115 need provide at least four pins to connect pin and as control signal among the figure.If size of display panels increases day by day, and the group number of its series connection luminescence component certainly will be followed increase.At this moment, luminescence component and control circuit connecting interface unit are provided with corresponding connection pin because of its group number according to its series connection luminescence component, connecting with each group in bulkiness of being derived in this luminescence component and control circuit connecting interface unit itself and luminescence component connecting interface unit, derive will make the slimming of panel be hindered really for the considerable connecting line of number between the luminescence component.
In view of this, the present invention discloses a kind of backlight modular structure, can take into account the maximization of flat display apparatus and the development of slimming thereof simultaneously.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of backlight modular structure design that is applicable to flat display apparatus, driving circuit structure under the control circuit of backlight modular structure in the known technology directly is integrated in the luminescence component array, can avoid carrying in the above-mentioned known technology series connection luminescence component group number increases, and the related pin number that makes luminescence component connecting interface unit and control circuit connecting interface unit increases and increases the thickness of its luminescence component connecting interface unit and control circuit connecting interface unit.
In addition, above-mentioned affiliated driving circuit structure directly is integrated in the luminescence component array, and the circuit bad connection that the connecting line that more can avoid the luminescence component array to pull out a great deal of because of need may cause to luminescence component connecting interface unit etc. are electrically connected mistake.
Moreover, driving circuit structure directly is integrated in the luminescence component array under above-mentioned, but except that the simplified control circuit structure, more can make the pin number of luminescence component connecting interface unit and control circuit connecting interface unit keep three, so solve in the known technology when strengthening because of display panel can't slimming problem.
Another fundamental purpose of the present invention is the public technology that cooperates above-mentioned fundamental purpose, further discloses one first connecting interface unit and one second connecting interface unit.The above-mentioned first connecting interface unit provides one first power interface end, one first control interface end and one first ground connection interface end to substitute the luminescence component connecting interface unit of being carried in the above-mentioned known technology.The above-mentioned second connecting interface unit then cooperates the first connecting interface unit one second source interface end, one second control interface end and one second ground connection interface end also to be set to substitute the control circuit connecting interface unit of being carried in the above-mentioned known technology in addition.
Particularly, the invention provides a kind of backlight modular structure, be applicable on the flat display apparatus, comprising: the luminescence component array; The luminescence component control module, it is electrically connected to this luminescence component array; And the first connecting interface unit, it comprises one first power interface end and one first control interface end, this first control interface end is electrically connected to this luminescence component control module, and wherein this first connecting interface unit also comprises the first ground connection interface end, and this first ground connection interface end is a ground connection.Wherein this backlight modular structure further comprises: power circuit; And the second connecting interface unit, it is electrically connected to this power circuit, this second connecting interface unit has second source interface end, the second control interface end and the second ground connection interface end, this second source interface end is to should the first power interface end, this second control interface end is to should the first control interface end, and this second ground connection interface end is to should the first ground connection interface end.
Description of drawings
Fig. 1 illustrates in the known technology, the circuit connection diagram of luminescence component array and luminescence component connecting interface unit thereof;
Fig. 2 illustrates in the known technology, the circuit connection diagram of control circuit structure and control circuit connecting interface unit thereof;
Fig. 3 is the circuit connection diagram of luminescence component array, driving circuit structure and the first connecting interface unit of first embodiment of the invention;
Fig. 4 is the circuit connection diagram of the power circuit unit and the second connecting interface unit of first embodiment of the invention;
Fig. 5 is the circuit connection diagram of luminescence component array, luminescence component control module and the first connecting interface unit of second embodiment of the invention;
Fig. 6 and Fig. 7 illustrate respectively among the present invention, the pin definition synoptic diagram of the first connecting interface unit and the second connecting interface unit; And
Fig. 8 is the circuit connection diagram of luminescence component array, luminescence component control module and the first connecting interface unit of third embodiment of the invention.
The component symbol explanation
11: the luminescence component array;
111: the first series connection luminescence components;
112: the second series connection luminescence components;
113: the three series connection luminescence components;
114: the four series connection luminescence components;
115: luminescence component connecting interface unit;
1111,1121,1131 and 1141: the control signal link or first end;
1112,1122,1132 and 1142: the power connector end or second end;
21: the control circuit structure;
211: the power circuit unit;
2111: bipolar junction transistor;
212: the luminescence component driver element;
2121,2122 and 2123: transistor chip;
213: control circuit connecting interface unit;
31: driving circuit structure;
32: the first connecting interface unit;
41: the second connecting interface unit;
51: the luminescence component control module;
1C and 2C: collector;
1E and 2E: emitter;
1B and 2B: base stage;
VCC: main power supply side;
DRV: external power source drive signal;
OUTPUT: power supply power supply output terminal; And
FB: external control signal.
Embodiment
The direct combination of circuit of luminescence component array 11 and driving circuit structure 31 thereof among the open the present invention of Fig. 3.Aforementioned driving circuit structure 31 is made up of two transistor chip 2122 and 2123.As the transistor chip of known technology label 2122 by being connected to the first series connection luminescence component first end 1111 and first end 1121 of the second series connection luminescence component, in order to provide the required same electrical flow valuve of the first series connection luminescence component 111 and the second series connection luminescence component 112 and as its control signal link.In addition, the transistor chip of label 2123 is first end 1131 by being connected to the 3rd series connection luminescence component and first end 1141 of the 4th series connection luminescence component then, in order to provide the required electric current identical with above-mentioned current value of the 3rd series connection luminescence component 113 and the 4th series connection luminescence component 114 and as its control signal link.So its each group series connection luminescence component 111,112,113 and 114 need not connect required transistor chip 2122 and 2123 by luminescence component connecting interface unit 115 described in the above-mentioned known technology and control circuit connecting interface unit 213.Therefore, the first connecting interface unit 32 disclosed in this invention only need provide a main power connector end of each group series connection luminescence component 111,112,113 and 114 and the control signal link of a driving transistors chip 2122 and 2123.
In Fig. 3,1st pin of the required main power supply of each group series connection luminescence component 111,112,113 and 114 by the first connecting interface unit 32 that the present invention carried be as a main power connector end, a main power supply that provides each group to connect luminescence component 111,112,113 and 114 by second end 1112,1122,1132 and 1142 that connects each group series connection luminescence component 111,112,113 and 114.
In Fig. 3, the control signal link that each group series connection luminescence component 111,112,113 and 114 is required, the 2nd pin by the first connecting interface unit 32 that the present invention carried is used as a major control signal connection end, as the control signal mode of connection in the known technology, each group series connection luminescence component 111,112,113 and 114 still needs to receive external control signal FB by transistor chip 2122 and 2123.But the present invention is different from the known technology each group series connection luminescence component 111,112,113 and 114 with transistor chip 2122 and opened design in 2123 minutes and need combine by luminescence component connecting interface unit 115 and control circuit connecting interface unit 213 as Figure 1 and Figure 2, causes luminescence component connecting interface unit 115 and control circuit connecting interface unit 213 to provide to be same as the input and the output connecting pin number of the luminescence component group number of connecting.The present invention has nothing to do in series connection luminescence component group number the input of luminescence component connecting interface unit 115 in the known technology and control circuit connecting interface unit 213 and output connecting pin number, with transistor chip 2122 and 2123 directly design be connected in first ends 1111,1121,1131 and 1141 and propose the first connecting interface unit 32 disclosed in this invention and use the luminescence component connecting interface unit 115 that replaces in the known technology of each group series connection luminescence component 111,112,113 and 114.
Fig. 4 is the circuit connection diagram of the power circuit unit 211 and the second connecting interface unit 41.Power circuit unit 211 comprises a main power supply side VCC, an external power source drive signal DRV, an external control signal FB and power supply power supply output terminal OUTPUT.The 1st pin of the above-mentioned second connecting interface unit 41 is connected in the power supply power supply output terminal OUTPUT of power circuit unit 211, and engages via the 1st pin with the first connecting interface unit 32, and the main power supply of light emitting array 11 is provided.In addition, the 2nd pin of the above-mentioned second connecting interface unit 41 then in order to the connection of external control signal FB to be provided, engages via the 2nd pin with the first connecting interface unit 32, provides as equivalent function in the known technology.
In addition, transistor chip 2122 and 2123 is except that can directly being arranged at as the present invention's circuit structure shown in Figure 3, as shown in Figure 5, first end 1111,1121,1131 and 1141 of opener its each the group series connection luminescence component 111,112,113,114 of the present invention can directly connect the required luminescence component control module 51 of any other side circuit.In addition, as shown in Figure 8, first end 1111,1121,1131,1141 that the present invention also discloses its each group series connection luminescence component 111,112,113,114 can directly be connected the required luminescence component control module 51 of any other side circuit with second end 1112,1122,1132,1142.
Fig. 6 and Fig. 7 are each pin definition of the second connecting interface unit 41 of explanation first connecting interface unit 32 that the present invention carried and correspondence thereof.The first connecting interface unit 32 as shown in Figure 6 has three pins.The 1st pin is one first power interface end, in order to the power connector end as light emitting array 11.The 2nd pin is one first control interface end, in order to the control signal link as light emitting array 11 and driving circuit structure 31 thereof.The 3rd pin is one first ground connection interface end, in order to the ground signalling link as light emitting array 11 and driving circuit structure 31 thereof.The second connecting interface unit 41 as shown in Figure 7 is three pins of corresponding first connecting interface 32 of tool also.The 1st pin is a second source interface end, in order to the power connector end of a power supply to be provided as power circuit 211.The 2nd pin is one second control interface end, in order to the control signal link as an external control signal FB.The 3rd pin is one second ground connection interface end, in order to the ground signalling link of conduct corresponding to the first ground connection interface end.
The above only is an illustrative, but not in order to restriction the present invention.Anyly be familiar with those of ordinary skill in the art, in not breaking away from spirit of the present invention and category,, all should be included in the claimed claim scope of the present invention its equivalent modifications of carrying out or change.
Claims (14)
1. a backlight modular structure is applicable on the flat display apparatus, comprising:
The luminescence component array;
The luminescence component control module, it is electrically connected to this luminescence component array; And
The first connecting interface unit, it comprises one first power interface end and one first control interface end, this first control interface end is electrically connected to this luminescence component control module, and wherein this first connecting interface unit also comprises the first ground connection interface end, and this first ground connection interface end is a ground connection;
Wherein this backlight modular structure further comprises:
Power circuit; And
The second connecting interface unit, it is electrically connected to this power circuit, this second connecting interface unit has second source interface end, the second control interface end and the second ground connection interface end, this second source interface end is to should the first power interface end, this second control interface end is to should the first control interface end, and this second ground connection interface end is to should the first ground connection interface end.
2. backlight modular structure as claimed in claim 1, wherein this first power interface end is electrically connected to this luminescence component array.
3. backlight modular structure as claimed in claim 2, wherein this luminescence component array comprises the first series connection luminescence component luminescence component of connect with second, this second luminescence component of connecting is parallel to this first luminescence component of connecting.
4. backlight modular structure as claimed in claim 3, wherein this luminescence component control module connects this first series connection luminescence component and this second first end of connecting luminescence component, and this first power interface end connects this first connect luminescence component and this second second end of connecting luminescence component.
5. backlight modular structure as claimed in claim 3, wherein this first series connection luminescence component is made up of a plurality of light emitting diodes.
6. backlight modular structure as claimed in claim 1, wherein this first power interface end is electrically connected to this luminescence component control module.
7. backlight modular structure as claimed in claim 6, wherein this luminescence component array comprises the first series connection luminescence component luminescence component of connect with second, this second luminescence component of connecting is parallel to this first luminescence component of connecting.
8. backlight modular structure as claimed in claim 7, wherein this luminescence component control module connects this first series connection luminescence component and this second first end and second end of connecting luminescence component.
9. backlight modular structure as claimed in claim 7, wherein this first series connection luminescence component is made up of a plurality of light emitting diodes.
10. backlight modular structure as claimed in claim 1, wherein this power circuit connects a power supply signal.
11. backlight modular structure as claimed in claim 1, wherein this second control interface end is in order to transmit a control signal.
12. backlight modular structure as claimed in claim 1, wherein this luminescence component array is made up of a plurality of light emitting diodes.
13. backlight modular structure as claimed in claim 1, wherein this luminescence component control module is a current control unit.
14. backlight modular structure as claimed in claim 1, wherein this luminescence component control module is a current mirror driver element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100779191A CN100371800C (en) | 2005-06-15 | 2005-06-15 | Backlight module structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100779191A CN100371800C (en) | 2005-06-15 | 2005-06-15 | Backlight module structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693966A CN1693966A (en) | 2005-11-09 |
| CN100371800C true CN100371800C (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100779191A Expired - Fee Related CN100371800C (en) | 2005-06-15 | 2005-06-15 | Backlight module structure |
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| CN (1) | CN100371800C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308623B (en) * | 2007-05-16 | 2011-11-02 | 奇美电子股份有限公司 | Liquid crystal display, back light device and driving method thereof |
| CN102195345A (en) * | 2011-03-25 | 2011-09-21 | 杭州再灵电子科技有限公司 | Power control device |
| JP2013182076A (en) * | 2012-02-29 | 2013-09-12 | Toshiba Corp | Video display device and light emission device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040130518A1 (en) * | 2002-10-14 | 2004-07-08 | Lumileds Lighting U.S., Llc | Circuit arrangement |
| CN1545372A (en) * | 2003-11-27 | 2004-11-10 | 友达光电股份有限公司 | Backlight module |
| CN1585572A (en) * | 2003-08-20 | 2005-02-23 | 沛亨半导体股份有限公司 | Method for driving LED by current mirror |
| CN1605911A (en) * | 2003-10-09 | 2005-04-13 | 先锋株式会社 | Backlight device and display apparatus |
-
2005
- 2005-06-15 CN CNB2005100779191A patent/CN100371800C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040130518A1 (en) * | 2002-10-14 | 2004-07-08 | Lumileds Lighting U.S., Llc | Circuit arrangement |
| CN1585572A (en) * | 2003-08-20 | 2005-02-23 | 沛亨半导体股份有限公司 | Method for driving LED by current mirror |
| CN1605911A (en) * | 2003-10-09 | 2005-04-13 | 先锋株式会社 | Backlight device and display apparatus |
| US20050105284A1 (en) * | 2003-10-09 | 2005-05-19 | Pioneer Corporation | Backlight device and display apparatus |
| CN1545372A (en) * | 2003-11-27 | 2004-11-10 | 友达光电股份有限公司 | Backlight module |
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| CN1693966A (en) | 2005-11-09 |
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