CN100410766C - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN100410766C CN100410766C CNB2004100840369A CN200410084036A CN100410766C CN 100410766 C CN100410766 C CN 100410766C CN B2004100840369 A CNB2004100840369 A CN B2004100840369A CN 200410084036 A CN200410084036 A CN 200410084036A CN 100410766 C CN100410766 C CN 100410766C
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- backlight module
- conducting layer
- fluorescent
- transparency conducting
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Abstract
The present invention relates to a backlight module which comprises a frame body and a plurality of lamp tubes, wherein the lamp tubes are arranged in the frame body, and every lamp tube comprises a lamp tube body and a transparent conducting layer which is directly covered on the surface of the lamp tube body. The transparent conducting layer covered on the surface of the lamp tube body can restrain electromagnet interference generated by the lamp tubes. In addition, the present invention also discloses a liquid crystal display.
Description
Technical field
The invention relates to a kind of backlight module and display, and particularly about the invention of a kind of backlight module (back light module) with LCD (liquidcrystal display device, LCD device).
Background technology
Because the demand of display grows with each passing day, so industry drops into the development of related display with all strength.Wherein, (cathode raytube CRT) because of having excellent display quality and technology maturation, therefore monopolizes the monitor market all the year round with cathode-ray tube (CRT) again.Yet, recently because the rise of environmental protection notion, since its energy resource consumption big with produce the bigger characteristic of radiant quantity, add that product flattening space is limited, therefore can't satisfy the market trend of market for light, thin, short, little, U.S. and low consumpting power.Therefore, have that high image quality, space utilization efficient are good, (thin film transistorliquid crystal display TFT-LCD) becomes the main flow in market to the Thin Film Transistor-LCD of low consumpting power, advantageous characteristic such as radiationless gradually.
Fig. 1 represents the synoptic diagram of known LCD.Please refer to Fig. 1, known LCD 10 comprises backlight module 100 and display panels 200, and wherein display panels 200 is arranged on the backlight module 100.In addition, backlight module 100 comprises framework 110, a plurality of fluorescent tube 120 and diffuser plate 130 (diffusion plate), and wherein these fluorescent tubes 120 are arranged in the framework 110, and diffuser plate 130 is arranged on the framework 110.The light that above-mentioned fluorescent tube 120 is sent forms area source after the surperficial outgoing of diffuser plate 130.
It should be noted that, because fluorescent tube 120 is near display panels 200, therefore the high-frequency driving voltage of fluorescent tube 120 will for display panels 200 produce electromagnetic interference (EMI) (electromagnetic interference, EMI), the mobile ripple (waving) that is occurred when for example showing.In order to solve the above problems, the common practice is that the level with the driving voltage frequency of fluorescent tube 120 and display panels 200 scans frequency and is adjusted into (synchronization) synchronously, flows to avoid ripple.Yet this kind method just allows ripple visually more not obvious, and can't eliminate the ripples line fully.
The another kind of common practice is to be provided with to have indium tin oxide layer (indium tin oxide between framework 110 and display panels 200, ITO) polyester sheet (polyester plate, PET plate), with the high-frequency driving voltage that reduces fluorescent tube 120 for display panels 200 electromagnetic interference (EMI) that caused.
Can reduce electromagnetic interference (EMI) though it should be noted that this kind method, manufacturing cost also is relative increase.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of backlight module, to improve electromagnetic interference (EMI) for electronic installation on every side.
In addition, another object of the present invention provides a kind of LCD, and its backlight module is difficult for producing electromagnetic interference (EMI) for display panels.
Based on above-mentioned purpose or other purpose, the present invention proposes a kind of backlight module, comprises framework and a plurality of fluorescent tube, and wherein these fluorescent tubes are arranged in the framework.In addition, each fluorescent tube comprises lamp tube body and directly is covered in one of lamp tube body surface transparency conducting layer.
Described according to preferred embodiment of the present invention, the material of transparency conducting layer is selected from by indium tin oxide (indium tin oxide, ITO), indium-zinc oxide (indium zinc oxide, IZO), aluminium zinc oxide (aluminum zincoxide, AZO), the cadmium tin-oxide (cadmium tin oxide, CTO), zinc paste (ZnO) and zirconium dioxide (ZrO
2) a kind of in the group that formed.
Described according to preferred embodiment of the present invention, lamp tube body for example be the cold cathode fluorescent lamp pipe (cold cathode fluorescent lamp, CCFL).
Described according to preferred embodiment of the present invention, backlight module also comprises a plurality of conductance supporting framves, be arranged in the framework, and these fluorescent tubes are fixed in the framework by these conductance supporting framves, and the transparency conducting layer of these fluorescent tubes is electrically connected with framework by these conductance supporting framves.In addition, the material of conductance supporting frame for example is metal or conductive plastics.
Described according to preferred embodiment of the present invention, backlight module also comprises at least one blooming piece, is fixed on the framework and is positioned on the fluorescent tube.
Based on above-mentioned purpose or other purpose, the present invention proposes a kind of LCD, comprises backlight module and display panels, and wherein display panels and backlight module fit together.In addition, backlight module comprises framework and a plurality of fluorescent tube, and wherein these fluorescent tubes are arranged in the framework, and each fluorescent tube comprises lamp tube body and the transparency conducting layer that directly is covered in the lamp tube body surface.
Described according to preferred embodiment of the present invention, the material of transparency conducting layer is selected from a kind of in the group that is made up of indium tin oxide, indium-zinc oxide, aluminium zinc oxide, cadmium tin-oxide, zinc paste and zirconium dioxide.
Described according to preferred embodiment of the present invention, lamp tube body for example is the cold cathode fluorescent lamp pipe.
Described according to preferred embodiment of the present invention, backlight module also comprises a plurality of conductance supporting framves, be arranged in the framework, and these fluorescent tubes are fixed in the framework by these conductance supporting framves, and the transparency conducting layer of these fluorescent tubes is electrically connected with framework by these conductance supporting framves.In addition, the material of conductance supporting frame for example is metal or conductive plastics.
Described according to preferred embodiment of the present invention, backlight module also comprises at least one blooming piece, is fixed on the framework and is positioned on the fluorescent tube.
Described according to preferred embodiment of the present invention, display panels for example is a liquid crystal display panel of thin film transistor.
Based on above-mentioned explanation, the present invention's Backlight module and liquid crystal display adopts the fluorescent tube that covers (coating) transparency conducting layer, so the high-frequency driving voltage of fluorescent tube is difficult for producing electromagnetic interference (EMI) for display panels.In other words, the present invention's LCD has preferable image quality.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Embodiment
Fig. 2 is the diagrammatic cross-section according to the backlight module of preferred embodiment of the present invention.Please refer to Fig. 2, backlight module 300 comprises framework 310 and a plurality of fluorescent tubes 320, and wherein these fluorescent tubes 320 are arranged in the framework 310.In addition, each fluorescent tube 320 comprises lamp tube body 322 and the transparency conducting layer 324 that directly is covered in lamp tube body 322 surfaces.In addition, the material of transparency conducting layer 324 for example is indium tin oxide, indium-zinc oxide, aluminium zinc oxide, cadmium tin-oxide, zinc paste, zirconium dioxide or super thin metal layer (ultra-thinmetal layer).Moreover lamp tube body 322 for example is the cold cathode fluorescent lamp pipe.
From the above, owing to be coated with transparency conducting layer 324 on lamp tube body 322 surfaces, so the high-frequency driving voltage of fluorescent tube 320 is difficult for producing electromagnetic interference (EMI) for the electronic installation that is positioned at backlight module 300 peripheries.In addition, use the polyester sheet with indium tin oxide layer to compare with known technology, owing to transparency conducting layer 324 is coated on lamp tube body 322 surfaces, so the present invention's backlight module 300 has higher brightness.About the LCD of the backlight module 300 that uses the present invention will describe as after.
Fig. 3 is the synoptic diagram according to the LCD of a preferred embodiment of the present invention.Please refer to Fig. 3, LCD 20 comprises backlight module 300 and display panels 400, wherein display panels 400 fits together with backlight module 300, and display panels 400 for example is the display panels of liquid crystal display panel of thin film transistor or other kenel.Because the fluorescent tube 320 that is arranged in the backlight module 300 is coated with transparency conducting layer 324, so the high-frequency driving voltage of fluorescent tube 320 is difficult for producing electromagnetic interference (EMI) for the electronic installation that is positioned at fluorescent tube 320 peripheries.In other words, the fluorescent tube 320 of backlight module 300 is difficult for producing electromagnetic interference (EMI) for display panel 400, so the not only difficult ripple that produces of the present invention's LCD 20, has more higher display brightness.In order to improve the display effect of LCD 20, backlight module 300 also can have another kind of different design, its describe in detail as after.
Fig. 4 is the synoptic diagram according to the LCD of another preferred embodiment of the present invention.Please refer to Fig. 4, backlight module 500 also comprises a plurality of conductance supporting framves 530 and at least one blooming piece 540, and wherein these conductance supporting framves 530 are arranged in the framework 310, and the material of conductance supporting frame 530 for example is metal or conductive plastics.In addition, these fluorescent tubes 320 are fixed in the framework 310 by these conductance supporting framves 530, and transparency conducting layer 324 is electrically connected with framework 310 by conductance supporting frame 530.In addition, blooming piece 540 is fixed on the framework 310 and is positioned on the fluorescent tube 320.Blooming piece 540 for example is diffuser plate 542, prismatic lens (prism sheet) 544 and polarization-type brightening piece (dual brightness enhanced film, DBEF) 546, wherein diffuser plate 542 is arranged on the framework 310, and prismatic lens 544 is arranged between diffuser plate 542 and the polarization-type brightening piece 546.It should be noted that blooming piece 540 is not limited to the combination of diffuser plate 542, polarization-type brightening piece 544 and prismatic lens 546.
As mentioned above, owing to be subjected to influence meeting stored charge on transparency conducting layer 324 of the high-frequency driving voltage of fluorescent tube 320, therefore the conductance supporting frame 530 that supports fluorescent tube 320 can further reduce the electromagnetic interference (EMI) for display panels 400 with accumulating on charge-conduction on the transparency conducting layer 324 to framework 310.In addition, blooming piece 540 more can increase the display effect of LCD 20.
In sum, the present invention's Backlight module and liquid crystal display has following advantage:
One, the fluorescent tube of the present invention's backlight module lining transparency conducting layer, so the high-frequency driving voltage of fluorescent tube is difficult for producing electromagnetic interference (EMI) for the electronic installation that is positioned at the backlight module periphery.
Two, compare with known technology, the present invention's backlight module has higher brightness.
Three, because the present invention's backlight module is difficult for producing electromagnetic interference (EMI), therefore use the LCD of the present invention's backlight module to have preferable display effect.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; the those of ordinary skill of any technical field that the present invention belongs to; in thought that does not break away from the present invention and scope; when can doing a little change and improvement, so the present invention's protection domain should be as the criterion with claims institute restricted portion.
Description of drawings
Fig. 1 is the synoptic diagram of known LCD.
Fig. 2 is the diagrammatic cross-section according to the backlight module of preferred embodiment of the present invention.
Fig. 3 is the synoptic diagram according to the LCD of a preferred embodiment of the present invention.
Fig. 4 is the synoptic diagram according to the LCD of another preferred embodiment of the present invention.
The main element description of symbols
10: known LCD
20: LCD
100,300,500: backlight module
110,310: framework
120,320: fluorescent tube
130: diffuser plate
200,400: display panels
322: lamp tube body
324: transparency conducting layer
530: the conductance supporting frame
540: blooming piece
542: diffuser plate
544: prismatic lens
546: the polarization-type brightening piece
Claims (11)
1. backlight module is characterized in that comprising:
Framework; And
A plurality of fluorescent tubes are arranged in this framework, and wherein each fluorescent tube comprises lamp tube body and the transparency conducting layer that directly is covered in this lamp tube body surface;
A plurality of conductance supporting framves are arranged in this framework, and these fluorescent tubes are fixed in this framework by these conductance supporting framves, and this transparency conducting layer of these fluorescent tubes is electrically connected with this framework by these conductance supporting framves.
2. backlight module according to claim 1, the material that it is characterized in that this transparency conducting layer are selected from a kind of in the group that is made up of indium tin oxide, indium-zinc oxide, aluminium zinc oxide, cadmium tin-oxide, zinc paste and zirconium dioxide.
3. backlight module according to claim 1 is characterized in that this lamp tube body is the cold cathode fluorescent lamp pipe.
4. backlight module according to claim 1 is characterized in that the material of these conductance supporting framves comprises metal or conductive plastics.
5. backlight module according to claim 1 is characterized in that also comprising at least one blooming piece, is fixed on this framework and is positioned at the top of these fluorescent tubes.
6. LCD is characterized in that comprising:
Backlight module, comprise framework, a plurality of fluorescent tube and a plurality of conductance supporting frame, wherein these fluorescent tubes are arranged in this framework, and each fluorescent tube comprises lamp tube body and the transparency conducting layer that directly is covered in this lamp tube body surface, and these conductance supportings set up and place in this framework, these fluorescent tubes are fixed in this framework by these conductance supporting framves, and this transparency conducting layer of these fluorescent tubes is electrically connected with this framework by these conductance supporting framves; And
Display panels fits together with this backlight module.
7. LCD according to claim 6, the material that it is characterized in that this transparency conducting layer are selected from a kind of in the group that is made up of indium tin oxide, indium-zinc oxide, aluminium zinc oxide, cadmium tin-oxide, zinc paste and zirconium dioxide.
8. LCD according to claim 6 is characterized in that this lamp tube body is the cold cathode fluorescent lamp pipe.
9. LCD according to claim 6, the material that it is characterized in that these conductance supporting framves comprise a kind of in metal and the conductive plastics.
10. LCD according to claim 6 is characterized in that this backlight module also comprises at least one blooming piece, is fixed on this framework and is positioned at the top of these fluorescent tubes.
11. LCD according to claim 6 is characterized in that this display panels is a liquid crystal display panel of thin film transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100840369A CN100410766C (en) | 2004-10-18 | 2004-10-18 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100840369A CN100410766C (en) | 2004-10-18 | 2004-10-18 | Backlight module and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1763610A CN1763610A (en) | 2006-04-26 |
| CN100410766C true CN100410766C (en) | 2008-08-13 |
Family
ID=36747826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100840369A Expired - Fee Related CN100410766C (en) | 2004-10-18 | 2004-10-18 | Backlight module and liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100410766C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025327A (en) * | 2000-07-06 | 2002-01-25 | Nec Corp | Reflector and manufacturing method of the same, and liquid crystal display device using reflector |
| JP2002083571A (en) * | 2000-09-08 | 2002-03-22 | Matsushita Electric Ind Co Ltd | Cold-cathode tube light-emitting device |
| CN1506717A (en) * | 2002-12-12 | 2004-06-23 | 三星电子株式会社 | Liquid crystal display device with electromagnetic wave screening element |
| CN1570723A (en) * | 2003-07-11 | 2005-01-26 | 友达光电股份有限公司 | Electromagnetic interference proof luminous tube and backlight module for light source of liquid crystal display |
-
2004
- 2004-10-18 CN CNB2004100840369A patent/CN100410766C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025327A (en) * | 2000-07-06 | 2002-01-25 | Nec Corp | Reflector and manufacturing method of the same, and liquid crystal display device using reflector |
| JP2002083571A (en) * | 2000-09-08 | 2002-03-22 | Matsushita Electric Ind Co Ltd | Cold-cathode tube light-emitting device |
| CN1506717A (en) * | 2002-12-12 | 2004-06-23 | 三星电子株式会社 | Liquid crystal display device with electromagnetic wave screening element |
| CN1570723A (en) * | 2003-07-11 | 2005-01-26 | 友达光电股份有限公司 | Electromagnetic interference proof luminous tube and backlight module for light source of liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1763610A (en) | 2006-04-26 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: CPT Display Technology Shenzhen Ltd. Assignor: Chunghwa Picture Tubes Ltd. Contract fulfillment period: 2008.9.18 to 2013.9.18 Contract record no.: 2008990000654 Denomination of invention: Back-light module and liquid-crystal display device Granted publication date: 20080813 License type: Exclusive license Record date: 20081010 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.18 TO 2013.9.18; CHANGE OF CONTRACT Name of requester: SHENZHEN HUAYING DISPLAY TECHNOLOGY CO., LTD. Effective date: 20081010 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: CPT Display Technology Shenzhen Ltd. Assignor: Chunghwa Picture Tubes Ltd. Contract record no.: 2008990000654 Date of cancellation: 20130802 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20191018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |