CN1542517A - Directly-down backlight module - Google Patents
Directly-down backlight module Download PDFInfo
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- CN1542517A CN1542517A CNA2003101141583A CN200310114158A CN1542517A CN 1542517 A CN1542517 A CN 1542517A CN A2003101141583 A CNA2003101141583 A CN A2003101141583A CN 200310114158 A CN200310114158 A CN 200310114158A CN 1542517 A CN1542517 A CN 1542517A
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- light
- type backlight
- direct type
- backlight assembly
- light source
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Abstract
The straight-down back light assembly includes one diffusion plate, one reflecting plate connected to the diffusion plate to form one cavity, one light source set inside the cavity, and one light guiding board set between the light source and the reflecting plate.
Description
Technical field
The present invention relates to a kind of direct type backlight assembly, particularly a kind of following direct type backlight assembly: utilize and light guide plate is set between light source and reflecting plate, change the irradiant smooth conduct route of light source Lower Half, to increase optical performance.
Background technology
Fig. 1 represents all once disclosed known direct type backlight assembly structural representation of Japanese patent publication 2001-059961 and 07-045114.Known direct type backlight assembly 100 forms a cavity 130 with a backboard 110 and diffuser plate 120, a plurality of fluorescent tubes is set as light source 140 in cavity 130, and in order to increase the light utilization ratio of light source 140, on backboard 110, a reflecting plate 150 is set also; Silver-plated on reflecting plate 150, and reflecting plate 150 punching presses are bent to form the waveform (or other different shapes) that is beneficial to light reflection, be attached at backboard 110 again.
Though above-mentioned direct type backlight assembly 100 is for the light of light source 140 Lower Halves, increase the part utilization factor, but near emitted light under the light source 140, shown in arrow a, penetrate on reflecting plate 150, can be stopped by light source 140 and penetrate on light source 140 again, and still can't see through diffuser plate 120, penetrate outside the direct type backlight assembly 100, so part light still is wasted.
Summary of the invention
In view of this, purpose of the present invention just is to provide a kind of direct type backlight assembly, and described assembly utilization is provided with light guide plate between light source and reflecting plate, changes the irradiant smooth conduct route of light source Lower Half, to increase the direct type backlight assembly of optical performance.
For achieving the above object, the invention provides a kind of direct type backlight assembly, described assembly comprises: a diffuser plate; One reflecting plate, described reflecting plate is connected with above-mentioned diffuser plate, forms a cavity; One is arranged at the light source of above-mentioned cavity; An and light guide plate that is arranged between above-mentioned light source and the said reflection plate.
According to the present invention, because light guide plate has the function that changes light conduct path, so the light source of light source Lower Half ejaculation, can utilize light guide plate to avoid light source position, via baffle reflection, arrive diffuser plate, remedy the difference of bright blanking bar between the light source arrangement position simultaneously; Therefore the present invention simplifies the method for making and the cost of reflecting plate owing to do not need in addition reflecting plate to be struck out the wavy of known technology in addition.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent,, and in conjunction with the accompanying drawings, be described in detail below below especially exemplified by a preferred embodiment:
Description of drawings
Fig. 1 is known direct type backlight assembly sectional view.
Fig. 2 is the sectional view of direct type backlight assembly first embodiment of the present invention.
Fig. 3 is the sectional view of direct type backlight assembly second embodiment of the present invention.
Fig. 4 is the sectional view of direct type backlight assembly the 3rd embodiment of the present invention.
Fig. 5 is the sectional view of direct type backlight assembly the 4th embodiment of the present invention.
Symbol description:
100,200,300,400～direct type backlight assembly;
110～backboard;
120,210,310,410～diffuser plate;
130,250,350,450～cavity;
140,230,330,430～light source;
150,220,320,420～reflecting plate;
240,340,440～light guide plate;
341,441～protuberance;
360～light disperser;
460～photodiffusion material.
Embodiment
First embodiment
Fig. 2 is direct type backlight assembly 200 sectional views of first embodiment of the invention, a cavity 250 that is connected to form with a diffuser plate 210 and a reflecting plate 220, be provided with a plurality of fluorescent tubes in the cavity 250 as light source 230, wherein, one light guide plate 240 is arranged between light source 230 and the reflecting plate 220, in order to change the course of light.
When light after light source 230 penetrates, from the emitted light b of light source 230 first halves, promptly directly see through diffuser plate 210 and penetrate these direct type backlight assemblies 200; And, then be introduced into light guide plate 240 from the emitted light c of light source 230 Lower Halves, in light guide plate 240, the optical path of light c is changed, and utilizes the reflex of reflecting plate 220 again, leaves light guide plate 240, and see through diffuser plate 210, penetrate described direct type backlight assembly 200.In the present embodiment, the upper surface of light guide plate 240 is the plane.
In the present embodiment, light c is through the leaded light effect of light guide plate 240, makes it depart from position under the light source 230, avoids light reflected to be stopped by light source 230, therefore can see through diffuser plate 210 and penetrate outside the direct type backlight assemblies 200; Simultaneously, the light from light source 230 Lower Halves penetrate can remedy issuable blanking bar between light source 230 configurations, and make that direct type backlight assembly 200 whole light-emitting areas are more even via the effect of light guide plate 240.
Second embodiment
Fig. 3 is direct type backlight assembly 300 sectional views of second embodiment of the invention, a cavity 350 that is connected to form with a diffuser plate 310 and a reflecting plate 320, be provided with a plurality of fluorescent tubes in the cavity 350 as light source 330, wherein, one light guide plate 340 is arranged between light source 330 and the reflecting plate 320, in order to change the course of light, wherein light guide plate 340 upper surfaces are according to light source 330 positions, between light source 330 light guide plate 340 being designed to the mountain type swells, in the present embodiment, the upper surface of light guide plate 340 is shaped as circular arc camber.
When light after light source 330 penetrates, from the emitted light b of light source 330 first halves, promptly directly see through diffuser plate 310 and penetrate these direct type backlight assemblies 300; And, then be introduced into light guide plate 340 from the emitted light c of light source 330 Lower Halves, in light guide plate 340, the optical path of light c is changed, and utilizes the reflex of reflecting plate 320 again, leaves light guide plate 340, and see through diffuser plate 310, penetrate this direct type backlight assembly 300.
In the present embodiment, the emitted light c of light source 330 Lower Halves departs from its generation, thereby avoids light reflected to be stopped by light source 330 through the leaded light effect of light guide plate 340, penetrates outside the direct type backlight assemblies 300 and can see through diffuser plate 310; Simultaneously, protuberance 341 designs of light guide plate 340 surperficial mountain type protuberances, has the light harvesting effect simultaneously, after light enters light guide plate 340, via leaded light and reflex, easily light being concentrated on protuberance 341 penetrates and sees through diffuser plate 310 and leave this direct type backlight assembly 300, because protuberance 341 is provided with between the position at light source 330, and its light harvesting effect can form as a virtual fluorescent tube, therefore remedy in the past the shortcoming that institute between light source position may cause blanking bar, as in the mode of increase fluorescent tube number and density to reach the purpose of uniform area light source.
The 3rd embodiment
In the present embodiment, for making the more even distribution of light reach effective utilization, can be between light guide plate among second embodiment 340 and reflecting plate 320, install a diffusion sheet 360 additional as the light disperser, so that distribution of light is more even, as shown in Figure 4, after light c is incident in light guide plate 340, be incident in diffusion sheet 360 again, because the diffusion of diffusion sheet 360 departs from as light c is produced, after reflecting plate 320 reflections, again via diffusion sheet 360, light guide plate 340, and see through diffuser plate 310, penetrate this direct type backlight assembly 300.
The 4th embodiment
Fig. 5 is direct type backlight assembly 400 sectional views of the embodiment of the invention four, a cavity 450 that is connected to form with a diffuser plate 410 and a reflecting plate 420, be provided with a plurality of fluorescent tubes in the cavity 450 as light source 430, wherein, one light guide plate 440 is arranged between light source 430 and the reflecting plate 420, in order to change the course of light, wherein light guide plate 440 upper surfaces are according to light source 430 positions, between light source 430 light guide plate 440 being set to the mountain type swells, the section shape of light guide plate 440 can be circular arc camber or plane, in the present embodiment, be circular arc camber.
In the present embodiment, in light guide plate 440, be doped with photodiffusion material 460, and photodiffusion material 460 is concentrated substantially and is distributed under the fluorescent tube 430, the emitted light c of light source 430 Lower Halves is through the leaded light effect of light guide plate 440 and the diffusion of photodiffusion material 460, its generation is departed from, thereby avoid light reflected to be stopped by light source 430, penetrate outside the direct type backlight assembly 400 and can see through diffuser plate 410; Simultaneously, protuberance 441 designs of light guide plate 440 surperficial mountain type protuberances, has the light harvesting effect simultaneously, after light enters light guide plate 440, via leaded light and reflex, easily light being concentrated on protuberance 441 penetrates and sees through diffuser plate 410 and leave this direct type backlight assembly 400, because protuberance 441 is provided with between the position at light source 430, and its light harvesting effect can form as a virtual fluorescent tube, therefore remedy in the past the shortcoming that institute between light source position may cause blanking bar, as in the mode of increase fluorescent tube number and density to reach the purpose of uniform area light source.
According to the present invention, because light guide plate has the function that changes light conduct path, so the light of light source Lower Half ejaculation, can utilize light guide plate to avoid light source position, via baffle reflection, arrive diffuser plate, remedy the difference of bright blanking bar between the light source arrangement position simultaneously; The present invention is not owing to need in addition reflecting plate to be struck out the wavy of known technology in addition, therefore the production method and the cost of a simplification reflecting plate.
Though the present invention with preferred embodiment openly as above; yet be not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so being as the criterion of should being defined with claims scope of application of protection scope of the present invention.
Claims (9)
1. direct type backlight assembly comprises:
One diffuser plate;
One reflecting plate, described reflecting plate is connected with described diffuser plate, forms a cavity;
Be arranged at a plurality of light sources of described cavity; And
One is arranged at the light guide plate between described a plurality of light source and the described reflecting plate.
2. direct type backlight assembly as claimed in claim 1 is characterized in that: described a plurality of light sources are fluorescent tube.
3. direct type backlight assembly as claimed in claim 1 is characterized in that: described light guide plate has a plurality of protuberances, and these protuberances are arranged at respectively between described a plurality of light source.
4. direct type backlight assembly as claimed in claim 3 is characterized in that: described light guide plate also has a plurality of arc sections, and these arc sections are located between described a plurality of teat.
5. direct type backlight assembly as claimed in claim 1 is characterized in that: described light guide plate directly contacts with described reflecting plate.
6. direct type backlight assembly as claimed in claim 1 is characterized in that: comprise that also one is arranged at the light disperser between described light guide plate and the described reflecting plate.
7. direct type backlight assembly as claimed in claim 6 is characterized in that: described smooth disperser is a diffusion sheet.
8. direct type backlight assembly as claimed in claim 1 is characterized in that: be doped with photodiffusion material in the described light guide plate.
9. direct type backlight assembly as claimed in claim 8 is characterized in that: described photodiffusion material concentrate substantially be distributed in described a plurality of light sources under.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101141583A CN1317591C (en) | 2003-11-05 | 2003-11-05 | Directly-down backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101141583A CN1317591C (en) | 2003-11-05 | 2003-11-05 | Directly-down backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542517A true CN1542517A (en) | 2004-11-03 |
| CN1317591C CN1317591C (en) | 2007-05-23 |
Family
ID=34337039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101141583A Expired - Fee Related CN1317591C (en) | 2003-11-05 | 2003-11-05 | Directly-down backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317591C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103189680A (en) * | 2010-11-30 | 2013-07-03 | 夏普株式会社 | Illuminating device, display device and television receiver |
| CN103453390A (en) * | 2012-06-04 | 2013-12-18 | Tcl光电科技(惠州)有限公司 | LCD TV (Liquid Crystal Display Television), backlight module and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745114A (en) * | 1993-07-27 | 1995-02-14 | Mitsubishi Electric Corp | Backlight device |
| US5479328A (en) * | 1994-01-05 | 1995-12-26 | Interstate Electronics Corporation | High-brightness, high-efficacy backlight |
| US5986728A (en) * | 1997-07-23 | 1999-11-16 | Litton Systems, Inc. | Optically enhance day/night liquid crystal display backlight with TIR lens and both light sources on same side of waveguide |
| JPH1196822A (en) * | 1997-09-16 | 1999-04-09 | Toshiba Corp | Surface lighting system and display device using the same |
| JP3750431B2 (en) * | 1999-08-23 | 2006-03-01 | セイコーエプソン株式会社 | Display device |
| JP2001272659A (en) * | 2000-03-24 | 2001-10-05 | Hitachi Ltd | Liquid crystal display device |
-
2003
- 2003-11-05 CN CNB2003101141583A patent/CN1317591C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103189680A (en) * | 2010-11-30 | 2013-07-03 | 夏普株式会社 | Illuminating device, display device and television receiver |
| CN103189680B (en) * | 2010-11-30 | 2015-04-15 | 夏普株式会社 | Illuminating device, display device and television receiver |
| CN103453390A (en) * | 2012-06-04 | 2013-12-18 | Tcl光电科技(惠州)有限公司 | LCD TV (Liquid Crystal Display Television), backlight module and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1317591C (en) | 2007-05-23 |
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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 | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20070523 Termination date: 20201105 |