CN1664673A - Backlight module and method for forming the same - Google Patents
Backlight module and method for forming the same Download PDFInfo
- Publication number
- CN1664673A CN1664673A CN 200510065209 CN200510065209A CN1664673A CN 1664673 A CN1664673 A CN 1664673A CN 200510065209 CN200510065209 CN 200510065209 CN 200510065209 A CN200510065209 A CN 200510065209A CN 1664673 A CN1664673 A CN 1664673A
- Authority
- CN
- China
- Prior art keywords
- backlight module
- light source
- groove
- fluorescent lamp
- cold cathode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
This invention provides an apheliotropic module, which comprises a metal back board, a deflector plate mounted on the back board, a diffusing plate mounted on the back board and deflector plate and a plurality of light sources, wherein, in the relative position between light source and metal back board, the module forms a concaved groove with its convex direction far away the light source by an known means to increase the distance between light source and metal back board to lower the capacity effect between them.
Description
Technical field
The present invention relates to a kind of LCD, particularly relate to a kind of backlight module that improves capacity effect between light source and metal backing.
Background technology
LCD (LCD) itself can be not luminous, therefore must be by external light source, and especially thin film transistor (TFT) TFT colour liquid crystal display device uses backlight as lighting source usually.And the light of back lighting module source is cold cathode fluorescent lamp (CCFL) with three-wavelength or light emitting diode (LED) etc.Wherein cold cathode fluorescent lamp has characteristics such as high brightness, high-level efficiency, life-span length, high color rendering, adds cylindrical outer shape, therefore is easy to be combined into lamellar luminaire with light reflection element, is applied to flat-panel monitor (FPD) widely.
Light source module can be divided into two kinds of backlight type and preceding light formulas; Wherein backlight type can be divided into two kinds of edge light and direct sunshines according to the difference of light incoming position.The brightness of illumination of edge light formula backlight module is very even, and module profile thickness is also very frivolous, and the light service efficiency about about 50%, is adapted at using in the portable color LCD greatly.And the source efficiency of direct sunshine formula backlight module is greatly about about 60%, because module profile thickness is more thick and heavy, therefore being usually used in platform puts non-portable products such as type LCD display (monitor) or LCD TV.If when LCD surpassed more than 17 inches, the weight of direct sunshine formula backlight was lighter and handier than edge light formula backlight module on the contrary.Therefore, will be a kind of trend for large-sized LCD TV use in future direct sunshine formula backlight module.
Consult Fig. 1, Fig. 1 is traditional direct sunshine formula backlight module general profile chart, and a plurality of cold cathode fluorescent lamp 100 provide backlight to the liquid crystal panel (not shown) in the mode that is arranged in parallel.Light source is penetrated by cold cathode fluorescent lamp 100, after reflector plate 102 reflections, upwards penetrates in the front after diffuser plate 104 evenly disperses, and the major function of diffuser plate 104 is to handle carry out scattering via reflector plate 102 light reflected.One metal backing 106 is in order to carrying reflector plate 102 and cold cathode fluorescent lamp 100.
Because a plurality of cold cathode fluorescent lamp 100 of direct sunshine formula backlight module are the tops that is arranged in metal backing 106 in regular turn, after cold cathode fluorescent lamp 100 is lighted, can cause a capacity effect between itself and the metal backing 106, this capacity effect will cause the generation of leakage current, cause part power input so capacity effect and run off, cause the bad consequence of energy dissipation and light conversion efficiency.Therefore, do one's utmost to need a kind of backlight modular structure and solve above-mentioned problem.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of backlight module that improves capacity effect between light source and metal backing.
Another object of the present invention provides a kind of backlight module that reduces intake dissipation.
A further object of the present invention provides a kind of backlight module that promotes light conversion efficiency.
Another purpose of the present invention provides a kind of backlight module that reduces leakage current between cold cathode fluorescent lamp and metal backing.
Another purpose of the present invention provides a kind of formation method of the backlight module that achieves the above object.
According to above-mentioned purpose, the backlight module formation method that the present invention proposes is that light source is positioned at relative position on the metal backing, utilizes known mode to form protrusion direction towards the groove away from light source, increase the distance between light source and metal backing thus, reduce capacity effect between the two.
According to above-mentioned purpose, backlight module of the present invention comprises the backboard with a plurality of grooves; One is positioned at the reflecting plate of backboard top; One is positioned at the diffuser plate of backboard and reflecting plate top; And a plurality of light sources, between reflecting plate and diffuser plate, and lay respectively at above a plurality of grooves of backboard.
Description of drawings
Fig. 1 is the general profile chart of traditional direct sunshine formula backlight module;
Fig. 2 is direct sunshine formula backlight module general profile chart according to the preferred embodiment of the invention, and wherein groove shapes is an arc;
Fig. 3 is direct sunshine formula backlight module general profile chart according to another embodiment of the present invention, and wherein groove shapes is a triangle; And
Fig. 4 is direct sunshine formula backlight module general profile chart according to another embodiment of the present invention, and wherein groove shapes is a rectangle.
Embodiment
Figure 2 shows that according to the formed direct sunshine formula of preferred embodiment of the present invention backlight module general profile chart.Wherein, on a metal backing 206, be arranged with many cold cathode fluorescent lamp (CCFL) 200 as light source, wherein the also available light emitting diode of this light source (LED), Organic Light Emitting Diode (OLED), halogen tungsten lamp, electroluminescence (ELD), emission of cathode lamp (CLL) and metal halide lamp provide; One diffuser plate 204 is positioned at the top of cold cathode fluorescent lamp 200, and its major function is to improve positive brightness, and makes the distribution of light of cold cathode fluorescent lamp 200 emissions more even.Light source after wherein being penetrated by cold cathode fluorescent lamp 200 is reflecting via reflecting plate 202, and is upwards penetrating in the front after diffuser plate 204 evenly disperses.
After cold cathode fluorescent lamp 200 is lighted, itself and 206 of metal backings will cause a capacity effect, and the capacitance size of its generation is shown below:
Wherein, A is a cold cathode fluorescent lamp 200 and the corresponding area of metal backing 206, and d is a distance between the two, and ε is the specific inductive capacity in both spaces.Because this electric capacity can cause leakage current generating, cause power input to run off, therefore, the present invention reduces the electric capacity that exists with ... between the two by increasing the distance of 206 of cold cathode fluorescent lamp 200 and metal backings, reduces the generation of leakage current.
The present invention in cold cathode fluorescent lamp 200 on the relative position of metal backing 206, utilize impact style to form groove 208, the distance that these grooves are 208 all equates, and its protrusion direction is towards the direction away from cold cathode fluorescent lamp 200, increase thus 206 of cold cathode fluorescent lamp 200 and metal backings apart from d.Wherein the section shape of this groove 208 comprises arc, triangle, rectangle or Any shape, as long as can reach the shape that increases cold cathode fluorescent lamp 200 and 206 distances of metal backing, all can be applicable among the present invention.According to a preferred embodiment of the invention, the external form of formed groove 208 is an arc, and the formed groove 208 of impact style, if make 206 of cold cathode fluorescent lamp 200 and metal backings apart from d greater than 1.5mm, can obviously reduce the generation of leakage current.It should be noted that the present invention forms the method for groove 208, be not limited to impact style, any method that can form groove on metal backing 206 all can be used among the present invention.
Consult Fig. 3 and Fig. 4, represent section shape among the figure respectively according to formed triangular groove of other embodiments of the invention and rectangular recess 208.The bee-line that wherein above-mentioned each groove shapes and cold cathode fluorescent lamp are 200 all needs greater than 1.5mm, so that effectively reduce the generation of leakage current.
According to a preferred embodiment of the invention, backlight module of the present invention does not also require change cold cathode fluorescent lamp 200, reflecting plate 202 and the relative position of 204 of diffuser plates, it is to utilize the outward appearance that changes metal backing 206, increase the distance of 206 of cold cathode fluorescent lamp 200 and metal backings, therefore, structure of the present invention can be used on various backlight module.
Comprehensively above-mentioned, backlight modular structure of the present invention, on the relative position of light source at metal backing, form the groove of protrusion direction away from light source direction, to increase the distance between light source and metal backing, reduce the electric capacity that exists with ... between the two, reduce the generation of leakage current, promote power input and light conversion efficiency.
Though the present invention discloses with a preferred embodiment; but be not in order to limit the present invention; any those skilled in the art can make various changes and retouching, so protection scope of the present invention is defined with accompanying claims not breaking away from design of the present invention and scope.
Claims (10)
1. backlight module comprises:
One backboard has a plurality of grooves;
One reflecting plate is positioned at this backboard top;
One diffuser plate is positioned at this backboard and this reflecting plate top; And
A plurality of light sources between this reflecting plate and this diffuser plate, and lay respectively at above the corresponding groove of this backboard.
2. backlight module as claimed in claim 1, the section shape of wherein said groove comprises arc, triangle or rectangle.
3. backlight module as claimed in claim 1, the distance between wherein said light source and groove is greater than 1.5mm at least.
4. backlight module as claimed in claim 1, wherein said groove are to form with impact style.
5. backlight module as claimed in claim 1, the protrusion direction of wherein said groove are towards the direction away from light source.
6. backlight module as claimed in claim 1, the distance between wherein said groove all equate.
7. backlight module as claimed in claim 1, wherein said backboard are a metal backing.
8. backlight module as claimed in claim 1, wherein said light source are cold cathode fluorescent lamp.
9. backlight module as claimed in claim 1, wherein said light source is parallel to each other.
10. a LCD comprises backlight module as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100652097A CN100395635C (en) | 2005-04-14 | 2005-04-14 | Backlight module and method for forming the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100652097A CN100395635C (en) | 2005-04-14 | 2005-04-14 | Backlight module and method for forming the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1664673A true CN1664673A (en) | 2005-09-07 |
| CN100395635C CN100395635C (en) | 2008-06-18 |
Family
ID=35035831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100652097A Expired - Fee Related CN100395635C (en) | 2005-04-14 | 2005-04-14 | Backlight module and method for forming the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100395635C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7911558B2 (en) | 2007-06-01 | 2011-03-22 | Hitachi, Ltd. | Image display apparatus and backlight unit to be used therein |
| CN101512719B (en) * | 2006-09-15 | 2011-05-25 | 松下电器产业株式会社 | Electric discharge lamp, illuminator, and liquid crystal display |
| CN101563565B (en) * | 2006-12-20 | 2011-07-06 | 夏普株式会社 | Illumination device for display device, and display device |
| WO2013170503A1 (en) * | 2012-05-15 | 2013-11-21 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN104977752A (en) * | 2014-04-07 | 2015-10-14 | 三星显示有限公司 | Display apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6692137B2 (en) * | 2001-05-11 | 2004-02-17 | L-3 Communications | Display system using a hybrid backlight reflector |
| JP2003279978A (en) * | 2002-03-22 | 2003-10-02 | Hitachi Ltd | Liquid crystal display device |
| KR100774579B1 (en) * | 2002-10-25 | 2007-11-09 | 삼성전자주식회사 | Back light assembly and liquid crystal display having the same |
| KR101075593B1 (en) * | 2004-08-27 | 2011-10-20 | 삼성전자주식회사 | Back light assembly and direct type liquid crystal display having the same |
-
2005
- 2005-04-14 CN CNB2005100652097A patent/CN100395635C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101512719B (en) * | 2006-09-15 | 2011-05-25 | 松下电器产业株式会社 | Electric discharge lamp, illuminator, and liquid crystal display |
| CN101563565B (en) * | 2006-12-20 | 2011-07-06 | 夏普株式会社 | Illumination device for display device, and display device |
| US7911558B2 (en) | 2007-06-01 | 2011-03-22 | Hitachi, Ltd. | Image display apparatus and backlight unit to be used therein |
| WO2013170503A1 (en) * | 2012-05-15 | 2013-11-21 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN104977752A (en) * | 2014-04-07 | 2015-10-14 | 三星显示有限公司 | Display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100395635C (en) | 2008-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7938552B2 (en) | Reflecting device and application thereof in backlight unit for enhancing light directivity | |
| US7178962B2 (en) | Reflecting apparatus for backlight module of flat panel display | |
| KR20100025286A (en) | Back light unit and liquid crystal display device using the same | |
| CN100365485C (en) | Direct type backlight module | |
| TWI418899B (en) | Liquid crystal display and back-light module thereof | |
| TWI323367B (en) | Backlight module | |
| KR20110064743A (en) | Backlight unit and liquid crystal display device having the same | |
| TWI420202B (en) | Edge-type backlight module | |
| CN101556000A (en) | LED line light source and backlight source device | |
| CN100451770C (en) | Back light module | |
| CN100395635C (en) | Backlight module and method for forming the same | |
| US7255453B2 (en) | Direct type backlight unit and liquid crystal display device having the same | |
| US20130257704A1 (en) | Backlight module and liquid crystal display apparatus | |
| US20090296422A1 (en) | Optical Film and backlight Module using the same | |
| CN1567064A (en) | Backlight module | |
| CN1892342A (en) | Back-light module group | |
| CN103364991A (en) | Backlight module and display device | |
| CN1658046A (en) | Down backlight unit structure of liquid crystal display | |
| KR100924027B1 (en) | Back light system of Light Emitting Diode | |
| CN2898870Y (en) | Sided negative-light module | |
| TWI254170B (en) | Backlight module | |
| CN220752474U (en) | Backlight module capable of improving luminous uniformity | |
| US20050231980A1 (en) | Edge-type backlight module with a curved lamp | |
| CN100417990C (en) | Image displaying system and backlight module | |
| CN1635408A (en) | Direct type backlight module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |