CN1549030A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN1549030A CN1549030A CNA031366600A CN03136660A CN1549030A CN 1549030 A CN1549030 A CN 1549030A CN A031366600 A CNA031366600 A CN A031366600A CN 03136660 A CN03136660 A CN 03136660A CN 1549030 A CN1549030 A CN 1549030A
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- cover plate
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Abstract
The back light module consists of mainly one main body, one transformer cover plate and one transformer. The transformer cover plate is set in the bottom of the main body, and the transformer is set in the inside surface of the transformer cover plate and in some distance to the main body. The transformer and the transformer cover plate are first combined into one unit and the unit is then fixed onto the main body, and this reduces the locking time number and deformation of the back light module. No direct contact between the main body and the transformer can make cold cathode lamp tube in the main body in normal light emitting temperature, and one heat dissipating spacer set between the transformer and the transformer cover plate can raise the heat dissipating effect.
Description
Technical field
The present invention relates to be used in a kind of electricity field image communication the backlight module of display, particularly relate to a kind of high hot type that can effectively transformer (inverter) be produced and, and can reduce the backlight module (Back Light Module) of module body distortion probability.
Background technology
At the progress rapidly of multimedia society, be indebted to the tremendous progress of semiconductor subassembly or man-machine display device mostly.With regard to display, (Cathode Ray Tube CRT) because of having excellent display quality and its economy, monopolizes monitor market in recent years to cathode-ray tube (CRT) always.Yet, operate the environment of most terminating machine/display equipments on the table for the individual, or cut with the viewpoint of environmental protection, if predicted with the trend of saving the energy, cathode-ray tube (CRT) is because of still existing a lot of problems in its space utilization and the energy resource consumption, then can't provide effective solution for the demand of light, thin, short, little and low consumpting power.Therefore, have that high image quality, space utilization efficient are good, (Liquid Crystal Display LCD) becomes the main flow in market to the LCD of low consumpting power, advantageous characteristic such as radiationless gradually.
It should be noted that because liquid crystal molecule itself can't be luminous, so must provide liquid crystal panel required area source, make liquid crystal panel reach the effect of demonstration, and obtain enough brightness and contrast simultaneously by backlight module.Existing backlight module, usually be divided into two kinds of side incident type and straight-down negatives by structural shape, wherein, the backlight module of this side incident type, be to need by a light guide plate (lightguide plate), line source is converted to the required area source of liquid crystal panel, the backlight module of this straight-down negative then need not dispose light guide plate, just can directly provide liquid crystal panel required area source.
Please consult Figure 1 and Figure 2 simultaneously, Fig. 1 is the exploded perspective synoptic diagram that has known backlight module now, and Fig. 2 is the unitized construction synoptic diagram that has known backlight module now.Should have known backlight module 100 now, be to be example with the bottom-lighting type back light module herein, and its structure mainly is by a module body 110, a transformer (inverter) 120 and 130 formations of a transformer cover plate (inverter cover).Wherein, this module body 110, mainly be by an outer framework (bezel back) 112 and a plurality of cold cathode fluorescent lamp (Cold Cathode Fluorescence Lamp, CCFL) 114 formations, these cold cathode fluorescent lamp 114 are disposed in the outer framework 112, and the material of outer framework 112 for example is the reflection material, in order to the light that cold cathode fluorescent lamp 114 is launched, concentrates the liquid crystal panel (not shown) projection of being disposed towards module body 110 tops.
As shown in Figures 1 and 2, above-mentioned transformer 120 is disposed at the bottom of module body 110, and transformer cover plate 130 is disposed at the bottom of module body 110, and the inside surface of transformer cover plate 130 and contact with transformer 130, and transformer 120 is covered.Transformer 120 is made of a circuit board 122 and at least one lamp source driven unit 124, wherein lamp source driven unit 124 is disposed on the circuit board 122, and lamp source driven unit 124 is in order to drive cold cathode fluorescent lamp 114, can produce high heat during its running, so lamp source driven unit 124 can be considered the main heat source in the backlight module 100.
It should be noted that, existing known techniques is when carrying out the assembling of module body 110 and transformer 120 and transformer cover plate 130, be earlier transformer 120 to be placed on the locating piece (not shown) that outer framework 112 bottoms are convexly equipped with, so that transformer 120 is positioned on the installation region, again transformer 120 is locked in the bottom of outer framework 112 afterwards by locking component (for example screw).After transformer 120 and outer framework 112 are assembled, then utilize locking component (for example screw) to be locked in the bottom of outer framework 112 equally transformer cover plate 130, and transformer 120 is covered.
Yet above-mentioned so assembling mode with making the bottom of outer framework 112 need bear locking power repeatedly, causes the probability raising of module body 110 distortion easily.In addition, in the existing known techniques after transformer 120 and transformer cover plate 130 are assembled to the bottom of module body 110 in regular turn, the high heat that transformer 130 is produced when running can be towards the conduction of the bottom of module body 110, cause the rising of module body 110 internal temperatures, when module body 110 temperature inside are higher than the luminance temperature of cold cathode fluorescent lamp 114, promptly can influence the luminescence efficiency of cold cathode fluorescent lamp 114, and then the briliancy that directly has influence on backlight module 100 presents.This shows that above-mentioned existing backlight module still has many defectives, and demands urgently further being improved.
In order to solve the problem that above-mentioned backlight module exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing backlight module exists, the inventor is actively studied innovation, through constantly studying, designing based on abundant practical experience and professional knowledge, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Fundamental purpose of the present invention is, overcome the defective that above-mentioned existing backlight module exists, and provide a kind of backlight module of new structure, technical problem underlying to be solved is to make it can reduce the locking number of times of backlight module when assembling, and then can reduce the probability that module body is out of shape, be suitable for practical effect more and have.
Another object of the present invention is to, a kind of backlight module is provided, technical matters to be solved is that it can be derived the high heat that transformer produced outside the backlight module smoothly, can avoid cold cathode fluorescent lamp to operate under the environment of high temperature, and then the briliancy that can promote backlight module represents.
Purpose of the present invention and to solve its technical problem underlying be to adopt following technical scheme to realize.According to a kind of backlight module that the present invention proposes, it comprises: a module body; One transformer cover plate is disposed at the bottom of this module body; And a transformer, be disposed at the inside surface of this transformer cover plate, and keep a spacing with this module body.
The object of the invention to solve the technical problems can also be further achieved by the following technical measures.
Aforesaid backlight module, wherein said module body comprises: an outer framework, have an inside surface and an outside surface, wherein this transformer cover plate is disposed on this outside surface; And at least one cold cathode fluorescent lamp, be disposed in this outer framework.
Aforesaid backlight module, the material of wherein said outer framework are a reflection material.
Aforesaid backlight module, it more comprises a reflector plate, wherein this reflector plate is disposed on this inside surface of this outer framework.
Aforesaid backlight module, it more comprises a diffusion sheet, wherein this diffusion sheet is disposed on this module body, and corresponding to the top of this cold cathode fluorescent lamp.
Aforesaid backlight module, it more comprises a brightening piece, wherein this brightening piece is disposed on this diffusion sheet.
Aforesaid backlight module, wherein said transformer comprises: a circuit board; And at least one lamp source driven unit, be disposed on this circuit board, and this lamp source driven unit contacts with this inside surface of this transformer cover plate.
Aforesaid backlight module, it more comprises a radiating gasket, this radiating gasket is disposed between this transformer and this transformer cover plate.
Purpose of the present invention and solve its technical problem underlying and also realize by the following technical solutions.According to a kind of backlight module that the present invention proposes, it comprises: a module body; One transformer cover plate has an installation portion and two support portions, and those support zones are in the lateral margin of this installation portion, and those support portions are disposed at the bottom of this module body; And a transformer, be disposed at the inside surface of this installation portion, and keep a spacing with this module body.
The object of the invention to solve the technical problems can also be further achieved by the following technical measures.
Aforesaid backlight module, wherein said module body comprises: an outer framework, have an inside surface and an outside surface, wherein this support portion is disposed on this outside surface; And at least one cold cathode fluorescent lamp, be disposed in this outer framework.
Aforesaid backlight module, the material of wherein said outer framework are a reflection material.
Aforesaid backlight module, it more comprises a reflector plate, wherein this reflector plate is disposed on this inside surface of this outer framework.
Aforesaid backlight module, it more comprises a diffusion sheet, wherein this diffusion sheet is disposed on this module body, and corresponding to the top of this cold cathode fluorescent lamp.
Aforesaid backlight module, it more comprises a brightening piece, wherein this brightening piece is disposed on this diffusion sheet.
Aforesaid backlight module, wherein said transformer comprises: a circuit board; And at least one lamp source driven unit, be disposed on this circuit board, and this lamp source driven unit contacts with this inside surface of this transformer cover plate.
Aforesaid backlight module, it more comprises a radiating gasket, wherein this radiating gasket is disposed between this transformer and this transformer cover plate.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of backlight module, and it is made of a module body, a transformer cover plate and a transformer.Wherein, this transformer cover plate is disposed at the bottom of module body, and transformer configuration is in the inside surface of transformer cover plate, and keeps a spacing with module body.
In preferred embodiment of the present invention, above-mentioned transformer cover plate has an installation portion and two support portions, and two support zones are in the lateral margin of installation portion, and is disposed at the bottom of module body, and transformer configuration is in the inside surface of installation portion, and keeps a spacing with module body.
In preferred embodiment of the present invention, above-mentioned module body is made of an outer framework and at least one cold cathode fluorescent lamp.Wherein, this outer framework has an inside surface and an outside surface, and transformer configuration is on the outside surface of outer framework, and cold cathode fluorescent lamp then is disposed in the outer framework.Transformer is made of a circuit board and at least one lamp source driven unit, and wherein, lamp source driven unit is disposed on the circuit board, and lamp source driven unit contacts with the inside surface of transformer cover plate.
In preferred embodiment of the present invention, a configurable reflector plate (reflector) on the inside surface of outer framework in order to the light that cold cathode fluorescent lamp is launched, is concentrated the liquid crystal panel projection of being disposed towards the module body top.In addition, the material of outer framework itself also can adopt the reflection material, with the assembly cost and the time of saving reflector plate.
In preferred embodiment of the present invention, for the briliancy of promoting backlight module presents, optionally dispose a diffusion sheet and a brightening piece, wherein diffusion sheet for example is to be disposed on the module body and corresponding to the top of cold cathode fluorescent lamp, and brightening piece for example is to be disposed on the diffusion sheet.
In preferred embodiment of the present invention, for example dispose a radiating gasket (thermal pad) between above-mentioned transformer and the transformer cover plate, can strengthen the radiating effect of adaptation to promote of transformer and cover plate by this radiating gasket.
The invention relates to a kind of backlight module, it is made of a module body, a transformer cover plate and a transformer.Wherein, the transformer cover plate is disposed at the bottom of module body, and transformer configuration is in the inside surface of transformer cover plate, and keeps a spacing with module body.
After the present invention is combined into a unit by earlier transformer and transformer cover being hardened, is fixed to again on the module body reducing the locking number of times of backlight module, and can reduces the probability that module body is out of shape.Its transformer cover plate is to make somebody a mere figurehead out a space in addition, after making transformer stationary transformer cover plate, when being fixed on the module body again, because transformer there is no directly with module body and contacts, therefore can reduce the heat conduction of transformer, and then the briliancy that can promote backlight module represents.
By said structure, backlight module of the present invention has the following advantages at least:
1, the present invention earlier is fixed in transformer lock on the transformer cover plate and after being combined into a unit, the transformer cover plate is locked in the bottom of module body again, thus can reduce backlight module screw lock number of times, and can reduce the probability that module body is out of shape.
2, transformer lock of the present invention is fixed on the transformer cover plate and not and directly contacts with module body, and can reduce the conduction of transformer heat, so that the cold cathode fluorescent lamp of module body inside can be in normal luminance temperature, and then promotes representing of brilliancy of backlight module.
3, the present invention disposes a radiating gasket between transformer and transformer cover plate, in order to the adaptation of reinforcement transformer and cover plate, and the high heat of transformer generation can be conducted on the heat abstractor more smoothly, and then can promote the radiating effect of heat abstractor.
In sum, the backlight module of special construction of the present invention can reduce the locking number of times of backlight module when assembling, and then can reduce the probability of module body distortion, is suitable for practical effect more and have; In addition it can be derived the high heat that transformer produced outside the backlight module smoothly, can avoid cold cathode fluorescent lamp to operate under the environment of high temperature, and then the briliancy that can promote backlight module represents.It has above-mentioned many advantages and practical value, and having there is no similar structural design in like product publishes or uses, no matter it structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the exploded perspective synoptic diagram that has known backlight module now.
Fig. 2 is the unitized construction synoptic diagram that has known backlight module now.
Fig. 3 is the exploded perspective synoptic diagram of a kind of backlight module of a preferred embodiment of the present invention.
Fig. 4 is the unitized construction synoptic diagram of a kind of backlight module of a preferred embodiment of the present invention.
100: backlight module 110: module body
112: outer framework 114: cold cathode fluorescent lamp
120: transformer 122: circuit board
124: lamp source driven unit 130: transformer cover plate
200: backlight module 210: module body
212: outer framework 214: cold cathode fluorescent lamp
220: transformer 222: circuit board
224: lamp source driven unit 230: transformer cover plate
232: installation portion 234: support portion
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of backlight module, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
See also Fig. 3, shown in Figure 4, Fig. 3 is the exploded perspective synoptic diagram of a kind of backlight module of a preferred embodiment of the present invention, and Fig. 4 is the unitized construction synoptic diagram of a kind of backlight module of a preferred embodiment of the present invention.
Please consult Fig. 3 and shown in Figure 4 simultaneously, backlight module of the present invention is to be that example describes with the bottom-lighting type back light module in the present embodiment, and it is made of a module body 210, a transformer 220 and a transformer cover plate 230; Wherein:
Above-mentioned module body 210 mainly is that these cold cathode fluorescent lamp 214 are disposed in the outer framework 212 by an outer framework 212 and 214 formations of a plurality of cold cathode fluorescent lamp (CCFL).For example dispose on the inside surface of this outer framework 212 and be provided with a reflector plate 216,, concentrate the liquid crystal panel (not shown) projection of being disposed towards module body 210 tops in order to the light that cold cathode fluorescent lamp 214 is launched.Certainly, outer framework 212 materials own also can adopt the reflection material, with the assembly cost and the time of saving reflector plate 216.
In addition, for the briliancy of promoting backlight module 200 presents, optionally configuration is provided with a diffusion sheet 217 and a brightening piece 218, wherein, this diffusion sheet 217 for example is to be disposed on the module body 210 and corresponding to the top of cold cathode fluorescent lamp 214, and this brightening piece 218 for example is to be disposed on the diffusion sheet 218.
Above-mentioned transformer cover plate 230, have an installation portion 232 and two support portions 234, this two support portion 234 for example is positioned at appointing on the both sides (also can be positioned on the whole periphery) of installation portion 232, and this support portion 234 is disposed at the bottom of outer framework 212, and transformer 220 is disposed at the inside surface of installation portion 232, and keeps a spacing with module body 210.
Above-mentioned transformer 220 is made of a circuit board 222 and at least one lamp source driven unit 224, and wherein this lamp source driven unit 224 is disposed on the circuit board 222, and this lamp source driven unit 224 contacts with the inside surface 232 of transformer cover plate 230.
So can learn that from above structure transformer cover plate 230 is to make somebody a mere figurehead out a space by the structural design of installation portion 232 and support portion 234, makes the transformer 220 and the module body 210 that are disposed on the transformer cover plate 230 there is no direct contact.
It should be noted that, when carrying out the assembling of module body 210 and transformer 220 and transformer cover plate 230, be earlier transformer 220 to be locked on the transformer cover plate 230 by locking component (for example screw), make transformer 220 and transformer cover plate 230 be combined into a unit, then transformer cover plate 230 is utilized equally locking component (for example screw) to be locked in the bottom of outer framework 212, and transformer 220 and transformer cover plate 230 are fixed in the bottom of outer framework 212.
Because the bottom of outer framework 212 only needs through a screw lock process (being screw lock transformer cover plate 230), thus the locking number of times of backlight module 200 can be reduced, and then can reduce the probability of module body 210 distortion.In addition, because transformer 220 need not be fixed on the module body 210, the locating piece of location usefulness is set, and then makes that the making of outer framework 212 is more convenient so the bottom of outer framework 212 needn't be shaped.
Please continue to consult Fig. 3 and shown in Figure 4, because transformer 220 is to be disposed on the transformer cover plate 230, and directly do not contact with module body 210, so the high heat that the lamp source driven unit 224 of transformer 220 is produced can conduct on the transformer cover plate 230, and contact with outside air and should derive smoothly outside the backlight module 200 by high heat energy.So, the cold cathode fluorescent lamp 214 of module body 210 inside can be in normal luminance temperature, and then can promote representing of backlight module 200 briliancy.
In addition, owing to transformer cover plate 230 is to make somebody a mere figurehead out a space by the structural design of installation portion 232 and support portion 234, the transformer 220 that is disposed on the transformer cover plate 230 be there is no directly with module body 210 to be contacted, so make outside air negotiable between transformer 220 and module body 210, and then can help heat radiation.
In addition, see also shown in Figure 4, for example dispose again between transformer 220 and the transformer cover plate 230 and be provided with a heat abstractor 240, this heat abstractor 240 can be a radiating gasket 250 is set in the present embodiment, configuration by this radiating gasket 250, can strengthen the adaptation of transformer 220 and cover plate 230, the high heat that transformer 220 is produced can conduct on the transformer cover plate 230 more smooth and easy and uniformly, and can further promote the radiating effect of heat abstractor 240.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (16)
1, a kind of backlight module is characterized in that it comprises:
One module body;
One transformer cover plate is disposed at the bottom of this module body; And
One transformer is disposed at the inside surface of this transformer cover plate, and keeps a spacing with this module body.
2, backlight module according to claim 1 is characterized in that wherein said module body comprises:
One outer framework has an inside surface and an outside surface, and wherein this transformer cover plate is disposed on this outside surface; And
At least one cold cathode fluorescent lamp is disposed in this outer framework.
3, backlight module according to claim 2, the material that it is characterized in that wherein said outer framework are a reflection material.
4, backlight module according to claim 2 is characterized in that it more comprises a reflector plate, and wherein this reflector plate is disposed on this inside surface of this outer framework.
5, backlight module according to claim 2 is characterized in that it more comprises a diffusion sheet, and wherein this diffusion sheet is disposed on this module body, and corresponding to the top of this cold cathode fluorescent lamp.
6, backlight module according to claim 5 is characterized in that it more comprises a brightening piece, and wherein this brightening piece is disposed on this diffusion sheet.
7, backlight module according to claim 1 is characterized in that wherein said transformer comprises:
One circuit board; And
At least one lamp source driven unit is disposed on this circuit board, and this lamp source driven unit contacts with this inside surface of this transformer cover plate.
8, backlight module according to claim 1 is characterized in that it more comprises a radiating gasket, and this radiating gasket is disposed between this transformer and this transformer cover plate.
9, a kind of backlight module is characterized in that it comprises:
One module body;
One transformer cover plate has an installation portion and two support portions, and those support zones are in the lateral margin of this installation portion, and those support portions are disposed at the bottom of this module body; And
One transformer is disposed at the inside surface of this installation portion, and keeps a spacing with this module body.
10, backlight module according to claim 9 is characterized in that wherein said module body comprises:
One outer framework has an inside surface and an outside surface, and wherein this support portion is disposed on this outside surface; And
At least one cold cathode fluorescent lamp is disposed in this outer framework.
11, backlight module according to claim 10, the material that it is characterized in that wherein said outer framework are a reflection material.
12, backlight module according to claim 10 is characterized in that it more comprises a reflector plate, and wherein this reflector plate is disposed on this inside surface of this outer framework.
13, backlight module according to claim 10 is characterized in that it more comprises a diffusion sheet, and wherein this diffusion sheet is disposed on this module body, and corresponding to the top of this cold cathode fluorescent lamp.
14, backlight module according to claim 13 is characterized in that it more comprises a brightening piece, and wherein this brightening piece is disposed on this diffusion sheet.
15, backlight module according to claim 9 is characterized in that wherein said transformer comprises:
One circuit board; And
At least one lamp source driven unit is disposed on this circuit board, and this lamp source driven unit contacts with this inside surface of this transformer cover plate.
16, backlight module according to claim 9 is characterized in that it more comprises a radiating gasket, and wherein this radiating gasket is disposed between this transformer and this transformer cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031366600A CN1310078C (en) | 2003-05-22 | 2003-05-22 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031366600A CN1310078C (en) | 2003-05-22 | 2003-05-22 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1549030A true CN1549030A (en) | 2004-11-24 |
| CN1310078C CN1310078C (en) | 2007-04-11 |
Family
ID=34323415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031366600A Expired - Lifetime CN1310078C (en) | 2003-05-22 | 2003-05-22 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1310078C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373234C (en) * | 2004-11-29 | 2008-03-05 | 友达光电股份有限公司 | Backlight module |
| CN102096214A (en) * | 2009-12-11 | 2011-06-15 | 乐金显示有限公司 | Liquid crystal display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08146396A (en) * | 1994-11-21 | 1996-06-07 | Casio Comput Co Ltd | Liquid crystal display device |
| JP3716580B2 (en) * | 1997-02-27 | 2005-11-16 | セイコーエプソン株式会社 | Liquid crystal device and manufacturing method thereof, and projection display device |
| JP2001350133A (en) * | 2000-06-05 | 2001-12-21 | Mitsubishi Electric Corp | Liquid crystal display device |
| JP2002246193A (en) * | 2001-02-15 | 2002-08-30 | Matsushita Electric Ind Co Ltd | Electric field suppressing circuit |
-
2003
- 2003-05-22 CN CNB031366600A patent/CN1310078C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373234C (en) * | 2004-11-29 | 2008-03-05 | 友达光电股份有限公司 | Backlight module |
| CN102096214A (en) * | 2009-12-11 | 2011-06-15 | 乐金显示有限公司 | Liquid crystal display device |
| US8810747B2 (en) | 2009-12-11 | 2014-08-19 | Lg Display Co., Ltd. | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1310078C (en) | 2007-04-11 |
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