CN1648742A - Back light module - Google Patents
Back light module Download PDFInfo
- Publication number
- CN1648742A CN1648742A CN 200510053016 CN200510053016A CN1648742A CN 1648742 A CN1648742 A CN 1648742A CN 200510053016 CN200510053016 CN 200510053016 CN 200510053016 A CN200510053016 A CN 200510053016A CN 1648742 A CN1648742 A CN 1648742A
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- CN
- China
- Prior art keywords
- backlight module
- light
- cover plate
- supply apparatus
- discharge lamp
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- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 230000011514 reflex Effects 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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Abstract
The back light module includes one light source device and one light guide board adjacent to the light source device. The light source device includes one high strength gas discharge lamp, one reflecting hood covering the high strength gas discharge lamp and with one opening, and one cover plate set in the opening. The high strength gas discharge lamp has high brightness, is the single light source in the back light module and is replaceable.
Description
Technical field
The present invention relates to a kind of backlight module.
Background technology
The light inlet mode of flat-panel screens backlight module is common side incident type and straight-down negative, because what the flat-panel screens of medium and small-sized was stressed is light, thin, little, it is less to add the needed luminous flux of the small screen, so the backlight module that can use the side incident type is to reduce the thickness of screen, and the flat-panel screens of medium-and-large-sized size is because screen is bigger, naturally required luminous flux is also bigger, if use the backlight module of side incident type, because it is limited and can't provide enough luminous fluxes to use to screen to be installed on the quantity of light source of backlight module side, so the normal direct type backlight module that uses, in general screen size is that the flat-panel screens of 20.1 inch to 46 inch needs 12 to 28 cold cathode fluorescent lamp that do not wait usually.
Yet, the cold cathode fluorescent lamp of medium-and-large-sized size flat-panel screens can agingly gradually along with the increase of service time reduce briliancy, see also Fig. 1, direct type backlight module 3 has diffusion sheet 31, framework 32, reflector plate 33 and fluorescent tube 34, diffusion sheet 31 and reflector plate 33 utilize framework 32 to be connected to each other, and fluorescent tube 34 is located therein and the penetration sheet 33 that emits beam again with upwards reflection of light, light passes diffusion sheet 31 backs and penetrates, after long-time the use, because the degree of aging of each cold cathode fluorescent lamp is not quite similar, can produce the phenomenon of picture brightness inequality this moment, if only change some old fluorescent tube, then change the briliancy of the new fluorescent tube in back and will want high than what the briliancy of other aging old fluorescent tube was come, therefore still can cause the picture brightness inequality, so best solution is, as long as when having a tubes to can't bear to use, just all fluorescent tubes are renewed comprehensively, operating characteristic with this series products of display, the accumulation of its service time than other products next fast, and serviceable life of heavy die block and safeguard that whether easy will be that the consumer considers one of key factor of whether buying, therefore, the convenience that how to improve light source serviceable life and increase to change light source is one of problem of solving of the anxious desire of flat-panel screens manufacturer.
Summary of the invention
In order to improve above-mentioned shortcoming, the invention provides a kind of backlight module and flat-panel screens, this backlight module comprises: a light supply apparatus and a light guide plate, this light guide plate is adjacent to this light supply apparatus, this light supply apparatus comprises a high-intensity gas discharge lamp, coats this high-intensity gas discharge lamp and has a reflex housing of an opening and is located at a cover plate on this opening, because high-intensity gas discharge lamp briliancy height is applied to be in the backlight module single light source, is convenient to change during as if damage.
Flat-panel screens comprises a light supply apparatus, a light guide plate and a two-d display panel, and light supply apparatus in the aforementioned backlight module and light guide plate are applied in the flat-panel screens, makes flat-panel screens be convenient to change light source equally.
First embodiment of flat-panel screens of the present invention is installed in light supply apparatus in arbitrary corner of light guide plate so that enough luminous fluxes to be provided.
Second embodiment of flat-panel screens of the present invention is installed in light supply apparatus the feet position of flat-panel screens one side so that enough luminous fluxes to be provided.
For being applied to bigger flat-panel screens, the 3rd embodiment of flat-panel screens of the present invention is installed in light supply apparatus the feet position of flat-panel screens dual side-edge so that enough luminous fluxes to be provided.
For above and other objects of the present invention, feature and advantage can be become apparent, hereinafter enumerate preferred embodiment especially, and cooperate appended diagram, be described in detail below.
Description of drawings
Fig. 1 is the synoptic diagram of existing direct type backlight module;
Fig. 2 A is the backlight module synoptic diagram of one embodiment of the invention;
Fig. 2 B is the decomposing schematic representation of the light supply apparatus of one embodiment of the invention;
Fig. 3 is the partial enlarged drawing of Fig. 2 A;
Fig. 4 is another structural representation of light supply apparatus;
Fig. 5 is another view of reflex housing (lamp reflector);
Fig. 6 is the first embodiment synoptic diagram of flat-panel screens of the present invention;
Fig. 7 is the second embodiment synoptic diagram of flat-panel screens of the present invention;
Fig. 8 is the 3rd an embodiment synoptic diagram of flat-panel screens of the present invention.
Embodiment
Please consult Fig. 2 A and Fig. 2 B simultaneously, backlight module 1 comprises a light supply apparatus 11 and is adjacent to a light guide plate of light supply apparatus 11 (light guide plate) 12, wherein this light supply apparatus 11 comprises a high-intensity gas discharge lamp (high intensity discharge lamp) 11 1, one reflex housing (lamp reflector), 112 and one cover plate 113, reflex housing (lamp reflector) 112 coats this high-intensity gas discharge lamp (highintensity discharge lamp) 111, and has an opening 114, cover plate 113 is arranged on this opening 114, and this reflex housing for example can be a parabola (Parabolic) structure, the structure that elliptical area structure or multi-angle plane are formed; Because high-intensity gas discharge lamp (high intensity discharge lamp) 111 has suitable good illumination efficiency (being generally 90lm/W), with the needed luminous flux of 30 inch flat-panel screens (usually at 3000lm), the flat-panel screens of lighting 30 inch only needs the light source of the high-strength gas discharge bulb of 35W as backlight module 1, because high-intensity gas discharge lamp (high intensitydischarge lamp) 111 has good luminous, can provide single light source to be applied in the flat-panel screens, so when high-intensity gas discharge lamp (high intensity discharge lamp) 111 can't bear to use, only need to change, can overcome the problem of only changing the picture brightness inequality that single fluorescent tube can cause in the prior art this single light source.
See also Fig. 3, high-intensity gas discharge lamp in the light supply apparatus 11 (high intensity dischargelamp) 111 is visible emitting 116 simultaneously, 116 ' and infrared ray 117,117 ', include a Cold Mirrors coating (cold mirror coating) 115 on the reflex housing (lampreflector) 112, Cold Mirrors coating (coldmirror coating) 115 is in order to reflect this visible light 116 but this infrared ray 117 is penetrated, in addition, cover plate 113 is a printing opacity, heat-resisting material, for example include a heat mirror coating (hot mirror coating) 118, the function of this heat mirror coating (hot mirror coating) 118 is just in time opposite with aforementioned Cold Mirrors coating (cold mirrorcoating) 115, in order to reflect this infrared ray 117 ' but this visible light 116 ' is penetrated, and optical scattering structure 119 is arranged on the cover plate 113, can provide visible light 116 ' diffusion to advance, because high strength gas radiation lamp 111 is when luminous, can produce high light, certainly heat energy is also followed and is given birth to, seeing through the present invention is located at Cold Mirrors coating (cold mirror) 115 and heat mirror coating (hot mirror) 118 in the light supply apparatus 11, high light is passed in the light guide plate (light guide plate) 12, and heat diverges in outside the backlight module 1, avoids backlight module 1 to cause damage because of temperature is too high.
In detail, when high-intensity gas discharge lamp (high intensity discharge lamp) 111 visible emitting 116,116 ' and infrared ray 117, after 117 ', the visible light 116 that orientating reflex cover (lamp reflector) 112 directions are advanced is because the relation of Cold Mirrors coating (cold mirror coating) 115 characteristics, it is inner and advance towards cover plate 113 directions to be reflected back toward reflex housing (lamp reflector) 112, utilize the characteristic of heat mirror coating (hotmirror coating) 118 to pass cover plate 113 and move on again, the visible light 116 ' that advances towards cover plate 113 directions then utilizes the characteristic of heat mirror coating on the cover plate 113 (hot mirror coating) 118, makes visible light 116 ' directly penetrate cover plate 113 and moves on.
On the other hand, the infrared ray 117 that orientating reflex cover (lamp reflector) 112 directions are advanced is because the relation of Cold Mirrors coating (cold mirror coating) 115 characteristics, can directly penetrate reflex housing (lampreflector) 112 and leave light supply apparatus 11, because infrared ray 117 is a thermal source, infrared ray 117 is discharged the effect that can reach heat radiation in the light supply apparatus 11; In addition, also have by high-intensity gas discharge lamp (highintensity discharge lamp) 111 emissions and the direct infrared ray 117 ' that advances towards cover plate 113 directions, infrared ray 117 ' is owing to the characteristic of heat mirror coating (hot mirror coating) 118 on the cover plate 113, reflected and leave cover plate 113 and advance towards reflex housing (lamp reflector) 112 directions, utilize the characteristic of Cold Mirrors coating (cold mirror coating) 115, infrared ray 117 ' is discharged in light supply apparatus 11, make the backlight module 1 of this case not only have enough luminous fluxes and overcome heat dissipation problem fully.
In addition, see also Fig. 4, the structure of light supply apparatus 11 also can be exchanged the position of cover plate among Fig. 3 113 and optical scattering structure 119, and as shown in Figure 4, all the other structures are all identical.
See also Fig. 5 again, the shape of the reflex housing in the light supply apparatus 11 (lamp reflector) 112 more can be the multi-angle plane among Fig. 5 except that the paraboloid structure or elliptical area structure of Fig. 3.
First embodiment
See also Fig. 6, flat-panel screens 2 comprises a light supply apparatus 11, a light guide plate (light guideplate) 12 and one two-d display panel 20, present embodiment places arbitrary corner of light guide plate (lightguide plate) 12 sides so that light source to be provided light supply apparatus 11, and this optical scattering structure 119 is arranged at the light inlet of light guide plate 12, advances so that visible light 116 ' diffusion to be provided.
Second embodiment
See also Fig. 7, flat-panel screens 2 ' comprises a light supply apparatus 11 ', a light guide plate (light guideplate) 12 ' and one two-d display panel 20 ', present embodiment places light supply apparatus 11 ' side of two-d display panel 20 ', the supporting seat (not shown) place of two-d display panel 20 ' below for example, so that light source to be provided, in the present embodiment, optical scattering structure 119 is arranged on the cover plate 113 and (sees also Fig. 3), advances so that visible light 116 ' diffusion to be provided.
The 3rd embodiment
See also Fig. 8, flat-panel screens 2 " comprise a light supply apparatus 11 ", a light guide plate (light guideplate) 12 " and a two-d display panel 20 ", present embodiment is applied to large-scale flat-panel screens 2 "; with light supply apparatus 11 " place two-d display panel 20 " the supporting seat (not shown) place of below dual side-edge, so that light source to be provided.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; some change and retouching of Ying Kezuo, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (13)
1. backlight module comprises:
One light supply apparatus comprises:
One high-intensity gas discharge lamp;
One reflex housing coats this high-intensity gas discharge lamp, and has an opening; And
One cover plate is arranged on this opening; And
One light guide plate is adjacent to this light supply apparatus.
2. backlight module as claimed in claim 1, wherein this reflex housing includes a Cold Mirrors coating.
3. backlight module as claimed in claim 2, wherein this high-intensity gas discharge lamp is launched a visible light and an infrared ray, and this Cold Mirrors coating is in order to reflect this visible light and to make this infrared penetration.
4. backlight module as claimed in claim 1, wherein this cover plate includes a heat mirror coating.
5. backlight module as claimed in claim 4, wherein this high-intensity gas discharge lamp is launched a visible light and an infrared ray, and this heat mirror coating is in order to reflect this infrared ray and this visible light is penetrated.
6. backlight module as claimed in claim 1, wherein this cover plate is a light-transmitting materials.
7. backlight module as claimed in claim 1, wherein this cover plate is a heat-resisting material.
8. backlight module as claimed in claim 1 also comprises an optical scattering structure, is arranged on this cover plate.
9. backlight module as claimed in claim 1 also comprises an optical scattering structure, is arranged between the opening of this cover plate and this reflex housing.
10. backlight module as claimed in claim 1 also comprises an optical scattering structure, is arranged at the light inlet of this light guide plate.
11. backlight module as claimed in claim 1, wherein this reflex housing comprises the structure that a paraboloid structure, elliptical area structure or multi-angle plane are formed.
12. backlight module as claimed in claim 1, wherein this light supply apparatus is positioned at a corner of this light guide plate.
13. backlight module as claimed in claim 1, wherein this light supply apparatus is positioned at a side of this light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510053016XA CN100373235C (en) | 2005-03-04 | 2005-03-04 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510053016XA CN100373235C (en) | 2005-03-04 | 2005-03-04 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1648742A true CN1648742A (en) | 2005-08-03 |
| CN100373235C CN100373235C (en) | 2008-03-05 |
Family
ID=34876650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510053016XA Expired - Fee Related CN100373235C (en) | 2005-03-04 | 2005-03-04 | Back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100373235C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776410A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10014407A1 (en) * | 2000-03-24 | 2001-09-27 | Philips Corp Intellectual Pty | Low pressure gas discharge lamp |
| TW522434B (en) * | 2000-06-16 | 2003-03-01 | Matsushita Electric Ind Co Ltd | Lamp unit and image projection apparatus |
| JP4519277B2 (en) * | 2000-06-23 | 2010-08-04 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
| JP2004005368A (en) * | 2002-03-27 | 2004-01-08 | Toshiba Corp | Plan execution system, plan execution method, and program |
-
2005
- 2005-03-04 CN CNB200510053016XA patent/CN100373235C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776410A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN108776410B (en) * | 2018-06-15 | 2020-07-28 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100373235C (en) | 2008-03-05 |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 |