CN1300632C - Directly-down backlight module - Google Patents
Directly-down backlight module Download PDFInfo
- Publication number
- CN1300632C CN1300632C CNB031475744A CN03147574A CN1300632C CN 1300632 C CN1300632 C CN 1300632C CN B031475744 A CNB031475744 A CN B031475744A CN 03147574 A CN03147574 A CN 03147574A CN 1300632 C CN1300632 C CN 1300632C
- Authority
- CN
- China
- Prior art keywords
- backlight module
- type backlight
- direct type
- plate
- protuberance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a direct-down back light module. The present invention comprises a first plate, a second plate which is connected with the first plate to form a space, a plurality of light sources which are arranged in the space, and a third plate, wherein the third plate is arranged outside the space and is attached to the surface of the first plate, and the third plate is provided with a plurality of openings.
Description
Technical field
The present invention relates to a kind of direct type backlight module, particularly relate to a kind of direct type backlight module that utilizes backboard to have perforate, to help to solve the heat dissipation problem of direct type backlight module.
Background technology
Fig. 1 has shown the existing directly-down backlight module structure synoptic diagram that Japanese patent publication 2001-059961 and 07-045114 all once disclosed.Existing direct type backlight module 100 forms a space 130 with a backboard 110 and diffuser plate 120, a plurality of fluorescent tube 140 is set as light source in space 130, and in order to increase the light utilization ratio of light source, on backboard 110, a reflector plate 150 is set also; If use reflector plate then backboard do not need silver-platedly, if do not use reflector plate, then backboard needs silver-platedly, and reflector plate 150 punching presses is bent into the waveform (or other different shape) that is beneficial to the light reflection, is attached at backboard 110 again.
Because traditional direct type backlight module 100 is for avoiding light leak, integral body requires the adaptation height, and the material of reflecting plate 150 not only can reflected light, also can reverberation.Therefore can allow direct type backlight module 100 temperature rise, the heat that so easily causes fluorescent tube 140 to produce is concentrated, and form thermal resistance (heat resistance) at the gummed place of backboard 110 and reflecting plate 150 again, thereby not only cause poor heat radiation, also influence the direct type backlight module whole lighting efficiency.
Summary of the invention
The object of the present invention is to provide a kind of direct type backlight module, utilize backboard to have the direct type backlight module of perforate, to help to solve the heat dissipation problem of direct type backlight module.
For reaching above-mentioned purpose, the invention provides a kind of direct type backlight module, comprising: a reflector plate, reflector plate comprises: a plurality of protuberances; And a plurality of depressed parts, this each protuberance and this each depressed part are arranged in mode interlaced with each other; One diffuser plate is connected with this reflector plate, forms a space; A plurality of fluorescent tubes are positioned at this space; And a metal backing, be positioned at this outside, space, be attached at the surface of this reflector plate, and have a plurality of perforates.According to the present invention, the back board part punching press to form hole, is not only reduced the thermal resistance that the gummed area produces, collocation simultaneously has lumpy reflector plate, forms the passage of heat radiation, more can arrange in pairs or groups with forced radiator, strengthens the heat radiation of direct type backlight module; In addition, the kink that the clout after the backboard punching press forms can attach with reflector plate, increases the structural strength of reflector plate.
Description of drawings
Fig. 1 is existing direct type backlight module cut-open view;
Fig. 2 is the direct type backlight module first embodiment cut-open view of the present invention;
Fig. 3 is the direct type backlight module second embodiment cut-open view of the present invention.
Embodiment
Fig. 2 is the first embodiment cut-open view of direct type backlight module of the present invention.Direct type backlight module 200 is formed a space 230 with one first plate and one second plate, one backboard 210 is arranged at 230 outsides, space, be attached at the surface of first plate, reinforcement first plate structure and increase adaptation, and a plurality of light sources are arranged in the space 230, and in the present embodiment, first plate is a reflector plate 250, second plate is a diffuser plate 220, and light source is a fluorescent tube 240; Wherein, for improving optical characteristics, reflector plate 250 is designed to have a plurality of protuberances 251 and depressed part 252, protuberance 251 is staggered with depressed part 252 and forms the reflector plate 250 of short trapezoidal moulding, fluorescent tube 240 is distributed in the depressed part 252, for preventing the protuberance 251 too high optics benefits that undermine, protuberance 251 exceeds with the center that is no more than contiguous two fluorescent tubes 240.
Direct type backlight module 200 of the present invention is for reaching heat sinking function, and backboard 210 is formed with a plurality of perforates 211 with impact style, and perforate 211 is corresponding with protuberance 251 positions, so form a plurality of passages 212 respectively; Clout after backboard 210 punching presses can form a plurality of kinks 213, is attached at the sidewall of passage 212, to strengthen the structural strength of reflector plate 250.
Backboard 210 can utilize the good characteristic of metal fever conduction for metal backing, the heat of direct type backlight module 200 is shed, and the perforate 211 of backboard 210, provide direct type backlight module 200 thermovents, simultaneously, perforate 211 and reflector plate 250 protuberances 251 formed passages 212 also provide the radiating mode of radiation and convection current; And if passage 212 extends to the border of direct type backlight module 200, can forced radiator (not indicating among the figure) be set in passage 212 correspondence positions, for example: fan, can increase the thermal convection effect, strengthen heat radiation.
In addition, as shown in Figure 3, the direct type backlight module 300 of second embodiment of the invention is formed space 330, one backboards 310 with one first plate and one second plate and is arranged at 330 outsides, space, is attached at the surface of first plate, reinforcement first plate structure and increase adaptation, and a plurality of light sources are arranged in the space 330, and in the present embodiment, first plate is a reflector plate 350, second plate is a diffuser plate 320, and light source is a fluorescent tube 340; Wherein, for improving optical characteristics, reflector plate 350 is designed to have a plurality of protuberances 351 and depressed part 352, protuberance 351 is staggered with depressed part 352 and forms the reflector plate 350 of triangle moulding, fluorescent tube 340 is distributed in the depressed part 352, for preventing the protuberance 351 too high optics benefits that undermine, protuberance 351 exceeds with the center that is no more than contiguous two fluorescent tubes 340.
Direct type backlight module 300 is for reaching heat sinking function, and backboard 310 is formed with a plurality of perforates 311 with impact style, and perforate 311 is corresponding with protuberance 351 positions, so form a plurality of passages 312 respectively; Clout after backboard 310 punching presses can form a plurality of kinks 313, is attached at the sidewall of passage 312, to strengthen the structural strength of reflector plate 350.
Backboard 310 can utilize the good characteristic of metal fever conduction for metal backing, the heat of direct type backlight module 300 is shed, and the perforate 311 of backboard 310, provide direct type backlight module 300 thermovents, simultaneously, perforate 311 and reflector plate 350 protuberances 351 formed passages 312 also provide the radiating mode of radiation and convection current; And if passage 312 extends to the border of direct type backlight module 300, can forced radiator (not indicating among the figure) be set in passage 312 correspondence positions, for example: fan, can increase the thermal convection effect, strengthen heat radiation.
In addition,, a disperser 360 also is set, comprises that first diffusion sheet 361, prismatic lens 362 and second diffusion sheet 363 are arranged on the diffuser plate 320, make astigmatism evenly in diffuser plate 320 for the light that helps direct type backlight module 300 evenly diffuses to whole front panel; Wherein, first diffusion sheet 361 is to be arranged on the diffuser plate 320.Prismatic lens 362 is arranged on first diffusion sheet 361.Second diffusion sheet 363 is arranged on the prismatic lens 362, wherein, and the visual demand of quantity that this prismatic lens and diffusion sheet are set and order and being adjusted.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to qualification the present invention, any skilled personnel, without departing from the spirit and scope of the present invention; can do some and change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (10)
1. direct type backlight module comprises:
One reflector plate, reflector plate comprises: a plurality of protuberances; And a plurality of depressed parts, this each protuberance and this each depressed part are arranged in mode interlaced with each other;
One diffuser plate is connected with this reflector plate, forms a space;
A plurality of fluorescent tubes are positioned at this space; And
One metal backing is positioned at this outside, space, is attached at the surface of this reflector plate, and has a plurality of perforates.
2. direct type backlight module as claimed in claim 1, wherein this each fluorescent tube is arranged at respectively in this each depressed part.
3. direct type backlight module as claimed in claim 2, the position of this each perforate wherein to should being provided with by each protuberance, and forms a plurality of passages.
4. direct type backlight module as claimed in claim 3, wherein this metal backing comprises: a plurality of kinks are attached at the sidewall of this each passage respectively.
5. direct type backlight module as claimed in claim 3, it also comprises a forced radiator, to being provided with by each passage.
6. direct type backlight module as claimed in claim 5, wherein this forced radiator is a fan.
7. direct type backlight module as claimed in claim 2, wherein the height of this each protuberance is lower than the line at this each the fluorescent tube center adjacent with this each protuberance.
8. direct type backlight module as claimed in claim 2, the wherein arrangement of this each protuberance and this each depressed part, the transversal section of formation is trapezoidal.
9. direct type backlight module as claimed in claim 2, the wherein arrangement of this each protuberance and this each depressed part, the transversal section of formation is a triangle.
10. direct type backlight module as claimed in claim 1, it also comprises:
One first diffusion sheet is positioned on this diffuser plate;
One prismatic lens is positioned on this first diffusion sheet; And
One second diffusion sheet is positioned on this prismatic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031475744A CN1300632C (en) | 2003-07-24 | 2003-07-24 | Directly-down backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031475744A CN1300632C (en) | 2003-07-24 | 2003-07-24 | Directly-down backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570725A CN1570725A (en) | 2005-01-26 |
| CN1300632C true CN1300632C (en) | 2007-02-14 |
Family
ID=34471989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031475744A Expired - Fee Related CN1300632C (en) | 2003-07-24 | 2003-07-24 | Directly-down backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1300632C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358713B (en) * | 2007-08-01 | 2014-04-02 | 群创光电股份有限公司 | Directly-down back light module unit and LCD using the directly-down back light module unit |
| CN102287722A (en) * | 2011-09-07 | 2011-12-21 | 上海蓝光科技有限公司 | Direct type backlight source module |
| CN102588882B (en) * | 2012-02-09 | 2014-02-26 | 青岛海信电器股份有限公司 | Backlight module and television set |
| CN102679243B (en) * | 2012-05-15 | 2014-10-08 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN102705755B (en) * | 2012-05-15 | 2015-03-25 | 深圳市华星光电技术有限公司 | Backlight module and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745114A (en) * | 1993-07-27 | 1995-02-14 | Mitsubishi Electric Corp | Backlight device |
| JPH07270785A (en) * | 1994-03-28 | 1995-10-20 | Nec Home Electron Ltd | Production of back light unit |
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JP2001059961A (en) * | 1999-08-23 | 2001-03-06 | Seiko Epson Corp | Display device |
-
2003
- 2003-07-24 CN CNB031475744A patent/CN1300632C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745114A (en) * | 1993-07-27 | 1995-02-14 | Mitsubishi Electric Corp | Backlight device |
| JPH07270785A (en) * | 1994-03-28 | 1995-10-20 | Nec Home Electron Ltd | Production of back light unit |
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JP2001059961A (en) * | 1999-08-23 | 2001-03-06 | Seiko Epson Corp | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1570725A (en) | 2005-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7178962B2 (en) | Reflecting apparatus for backlight module of flat panel display | |
| US20070013647A1 (en) | Surface light source using LED and backlight unit having the surface light source | |
| TW589494B (en) | Direct type backlight module | |
| TWI418899B (en) | Liquid crystal display and back-light module thereof | |
| CN101017282A (en) | LCD and back light module thereof | |
| CN101865376A (en) | Backlight module, display and manufacturing method of reflecting cover of backlight module | |
| CN102042534A (en) | Backlight module and large-sized ultrathin liquid crystal display television | |
| CN110196514A (en) | A kind of backlight module and its display device | |
| TWI420202B (en) | Edge-type backlight module | |
| CN102705755B (en) | Backlight module and display device | |
| CN210803928U (en) | Backlight module with comb-shaped lamp panel structure | |
| CN1300632C (en) | Directly-down backlight module | |
| CN108397701A (en) | A kind of backlight module and display equipment | |
| CN2546911Y (en) | Negative phototropic cover radiating structure | |
| CN1961179A (en) | Liquid crystal display and backlight device | |
| CN214427709U (en) | Backlight module and display device | |
| WO2010004798A1 (en) | Lighting device and liquid crystal display device | |
| CN212255956U (en) | Light bar, backlight source, display module and display device | |
| JP2001297623A (en) | Backlight | |
| CN101082734A (en) | Side light type back light module unit | |
| CN210295705U (en) | Backlight assembly and display device | |
| CN1645211A (en) | Direct down backlight module | |
| CN101153990A (en) | LED back light module group with curved surface reflection cup | |
| CN210294754U (en) | Backlight source structure with inclined light inlet | |
| CN108761625B (en) | Light guide plate and 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: 20070214 Termination date: 20210724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |