CN100376972C - Directed-down light-negative moulding set - Google Patents
Directed-down light-negative moulding set Download PDFInfo
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- CN100376972C CN100376972C CNB2005100679780A CN200510067978A CN100376972C CN 100376972 C CN100376972 C CN 100376972C CN B2005100679780 A CNB2005100679780 A CN B2005100679780A CN 200510067978 A CN200510067978 A CN 200510067978A CN 100376972 C CN100376972 C CN 100376972C
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- straight aphototropism
- aphototropism mode
- base plate
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Abstract
The present invention relates to a direct type backlight module which at least comprises a light source device, a bottom board, a high-voltage circuit board and a heat pipe, wherein the light source device is arranged on the bottom board; the lower surface of the bottom board can be divided into a first preset part and a second preset part; the high-voltage circuit board is arranged on the first preset part, and the light source device is electrically connected with the high-voltage circuit board; the heat pipe is arranged at the lower surface of the bottom board, so that heat energy generated by the high-voltage circuit board is conducted to the second preset part from the first preset part, and the temperature of the direct type backlight module can be distributed uniformly.
Description
Technical field
The present invention is about a kind of module backlight, particularly about a kind of down straight aphototropism mode set.
Background technology
Liquid crystal display (LCD) technology one is to being applied to notebook computer, mobile phone, digital camera, taking the photograph in the portable electronic products such as video recorder, PDA.Except these more small-sized portable products, recent large-sized liquid crystal panel manufacturing technology is also day by day ripe.For example, the desktop LCD replaces the CRT screen just gradually.LCD TV is held the light and handy advantage of its volume under the arm, also just competes with traditional tv on market at present.Liquid crystal panel (LCD panel) is the display element of most critical in the field for this reason, yet itself is not luminous, need be shown by being provided with just of a backlight.Had many kinds of backlight technology now, and in large scale (about's more than 20 cun) lcd products, often used down straight aphototropism mode set (direct lighting module), with backlight as liquid crystal panel.
Please refer to Fig. 1, Fig. 1 shows the three-dimensional explosive view of a typical down straight aphototropism mode set.Among the down straight aphototropism mode set 10; a plurality of fluorescent tubes 12 are arranged on the base plate 14 fifty-fifty; base plate 14 upper surfaces can be provided with reflector plate 16 usually; with the reflection so that the light that fluorescent tube 12 sends makes progress, light then can offer the liquid crystal panel 20 above the down straight aphototropism mode set 10 after process diffusion sheet 18.Diffusion sheet 18 can make the light that passes through produce scattering, when avoiding the user to watch liquid crystal panel 20, can directly see the shape of fluorescent tube 12 because of the brightness of fluorescent tube the last 12, produces the sensation of brightness disproportionation.Wherein, down straight aphototropism mode set 10 is because its fluorescent tube 12 directly is arranged at the below of liquid crystal panel 20, and therefore it gain the name.Usually can form a confined space to hold fluorescent tube 12 after down straight aphototropism mode set 10 assemblings are finished, influence the optical appearance of down straight aphototropism mode set 10 to avoid foreign matter or particle (particle) to enter.Wherein, down straight aphototropism mode set 10 more includes a plurality of lamp tube securing holders 13, in order to those fluorescent tubes 12 are fixedly arranged on base plate 14 tops one predetermined altitude, avoid directly contacting base plate 14, can help the Temperature Distribution of down straight aphototropism mode set 14 comparatively even thus, can make down straight aphototropism mode set 10 integral body to go out light effect better.
Please refer to Fig. 2, the backplan of Fig. 2 displayed map 1 base plate.More comprise a high-tension circuit plate 19 among the down straight aphototropism mode set 10, it is arranged at the lower surface of base plate 14, and high-tension circuit plate 19 electrically connects with a plurality of fluorescent tubes 12 shown in Figure 1, in order to be responsible for lighting a lamp and to supply those fluorescent tubes 12 suitable power supply.And as shown in Figure 2, it is one first predetermined partly 141 and 1 second predetermined partly 142 that base plate 14 lower surfaces can be divided into, and wherein first is predetermined partly 141 in order to high-tension circuit plate 19 to be set, and normally the mode that locks with screw is to be incorporated into the lower surface of base plate 14; And second predetermined partly the reservation so that other circuit board to be set, for example, can be in order to the required circuit board of liquid crystal panel 20 to be set, perhaps, for the manufacturer of some rear end products, for example make the manufacturer of LCD TV, it also needs the second predetermined space partly, so that the required circuit board of its product to be set.
Among the prior art that down straight aphototropism mode set 10 is correlated with, the problem of heat radiation is a technology emphasis that often comes into question.The above-mentioned mentioned heat energy problem that is produced about fluorescent tube 12 is an example.Among down straight aphototropism mode set 10, too high temperature can cause the decline of briliancy, is the down straight aphototropism mode set 10 that light is provided for major function, and such shortcoming is undoubtedly the technician and wants the problem that solves most.Yet except the heat energy problem that fluorescent tube 12 is produced, the heat energy problem that the high-tension circuit plate 19 of base plate 14 lower surfaces is produced may be brought more and seriously influence.High-tension circuit plate 19 also is the element that a meeting produces high temperature, though it is arranged at base plate 14 lower surfaces, non-being arranged in the fluorescent tube 12 residing confined spaces, the also non-exiting surface that is positioned at down straight aphototropism mode set 10, yet, keep for the circuit board of other follow-up setting to use owing to base plate 14 lower surfaces need the second predetermined part 142, so the heat energy that high-tension circuit plate 19 is produced make the reservations part 141 of winning have higher temperature with near its position.In other words, high-tension circuit plate 19 is brought is not only the high temperature problem that causes briliancy to descend-because high-tension circuit plate 19 causes the temperature distributing disproportionation of down straight aphototropism mode set 14 even, the related shortcoming that causes down straight aphototropism mode set 14 luminance nonuniformities.
Hence be, how improve the shortcoming that prior art still has,, be the primary direction that current techniques developed with the down straight aphototropism mode set that provides a kind of briliancy to be more evenly distributed.
Summary of the invention
The down straight aphototropism mode set that provides a kind of briliancy to be evenly distributed is provided fundamental purpose of the present invention.
Another object of the present invention is to improve the shortcoming of luminance nonuniformity that temperature distributing disproportionation causes in the existing down straight aphototropism mode set.
The invention provides a kind of down straight aphototropism mode set, it comprises a light supply apparatus, a base plate, a high-tension circuit plate and a heat pipe at least.Light supply apparatus is arranged on the base plate.It is partly predetermined with one second that the base plate lower surface can be divided into one first predetermined part.The high-tension circuit plate is arranged at the first predetermined part, and light supply apparatus is electrically connected at the high-tension circuit plate.And heat pipe is arranged at the base plate lower surface, predetermined partly conducts to second partly predeterminedly with heat energy that the high-tension circuit plate is produced by first, and makes the temperature distribution homogenization of down straight aphototropism mode set.
Disclosed among the present invention about in the down straight aphototropism mode set that is provided, the different embodiments of various elements with in conjunction with the embodiments, and provide multiple in order to promote the embodiment of heat conduction efficiency.And the present invention also provides relevant effect confirmatory experiment, to strengthen explanation advantage of the present invention.
Description of drawings
Fig. 1 shows the three-dimensional explosive view of a typical down straight aphototropism mode set;
The backplan of Fig. 2 displayed map 1 base plate;
Fig. 3 shows down straight aphototropism mode set three-dimensional exploded view of the present invention;
Fig. 4 A is a down straight aphototropism mode set backplan of the present invention;
Fig. 4 B displayed map 4A down straight aphototropism mode set removes the situation of high-tension circuit plate wherein;
Fig. 4 C shows another embodiment of the present invention;
Fig. 4 D shows another embodiment of the present invention;
The partial enlarged drawing of Fig. 5 A displayed map 4A heat pipe;
Fig. 5 B shows that heat pipe becomes a flat pattern cross section embodiment through beaing;
Fig. 5 C shows that another embodiment of the present invention adds the situation of regenerative block;
Fig. 6 A is Fig. 3 liquid crystal panel top view;
Fig. 6 B is Fig. 3 liquid crystal panel backplan;
Fig. 6 C is Fig. 3 down straight aphototropism mode set backplan;
Fig. 7 A is the experimental data that does not have heat pipe in the down straight aphototropism mode set;
Fig. 7 B is the experimental data that has heat pipe in the down straight aphototropism mode set; And
Fig. 7 C is Fig. 7 A and two groups of experiment other mean values of Fig. 7 B.
Symbol description
Down straight aphototropism mode set 10,30 fluorescent tubes 12
Lamp tube securing holder 13,33 base plates 14,34
First predetermined partly 141, the 341 second predetermined parts 142,342
High- tension circuit plate 19,39 liquid crystal panels 20,40
Embodiment
Please refer to Fig. 3, Fig. 3 shows down straight aphototropism mode set three-dimensional exploded view of the present invention.Among the down straight aphototropism mode set 30, light supply apparatus 32 is arranged on the base plate 34, base plate 34 upper surfaces can be provided with reflector plate 36, so that upwards reflection of the light that light supply apparatus 32 sends, light then can offer the liquid crystal panel 40 above the down straight aphototropism mode set 30 after process diffusion sheet 38.Diffusion sheet 38 can make the light that passes through produce scattering, when avoiding the user to watch liquid crystal panel 40, can directly see its shape because of the brightness of light supply apparatus the last 32, thereby produce the sensation of brightness disproportionation.Among present embodiment, light supply apparatus 32 adopts a plurality of fluorescent tubes, cold cathode ray tube (CCFL) for example, it is arranged on the base plate 34 fifty-fifty, among other embodiment of the present invention, light supply apparatus 32 also can adopt light emitting diode (light emitting diode, LED), or other luminous element.
Among the embodiment of Fig. 3, down straight aphototropism mode set 30 more includes a plurality of lamp tube securing holders 33, in order to light supply apparatus 32 (being fluorescent tube in the present embodiment) is fixedly arranged on base plate 34 tops one predetermined height, avoid directly contacting base plate 34, can help the Temperature Distribution of down straight aphototropism mode set 34 comparatively even thus, also can make down straight aphototropism mode set 30 integral body to go out light effect better.
Please refer to Fig. 4 A and Fig. 4 B, Fig. 4 A is a down straight aphototropism mode set backplan of the present invention, and the down straight aphototropism mode set of Fig. 4 B displayed map 3A removes the situation of high-tension circuit plate wherein.Among the down straight aphototropism mode set 30, more include a high-tension circuit plate 39 and at least one heat pipe 41, high-tension circuit plate 39 and heat pipe 41 are arranged at the lower surface of base plate 34.
The lower surface of base plate 34 can be divided into one first predetermined partly 341 and 1 second predetermined part 342.First is predetermined partly 341 in order to high-tension circuit plate 39 to be set, and second predeterminedly partly 342 reserve so that other circuit board to be set, for example, and can be in order to the required circuit board of liquid crystal panel 40 to be set.
It is first predetermined partly 341 that high-tension circuit plate 39 is arranged at, usually in the mode of screw locking being incorporated into the lower surface of base plate 34, and the light supply apparatus 32 that is positioned on the base plate 34 shown in Figure 3 is electrically connected at high-tension circuit plate 341.
Shown in Fig. 4 B, after removing high-tension circuit plate 39, can see that heat pipe 41 is arranged between base plate 34 and the high-tension circuit plate 39 in the first predetermined partly 341 pairing scopes.
It is one L shaped that heat pipe 41 forms through warpage among this embodiment, thus, with regard to single heat pipe 41, through the contact area of the heat pipe 41 of warpage and base plate 34 more not the heat pipe (not shown) of warpage come greatlyyer (because of heat pipe 41 length of warpage longer).In other real mode of the present invention, also heat pipe 41 warpages can be formed a N shape (being shown in Fig. 4 C) or a W shape (being shown in Fig. 4 D), thus, can make base plate 34 lower surfaces hold longer heat pipe 41.
Three heat pipes 41 all are set in base plate 34 lower surfaces among the embodiment shown in Fig. 4 A to Fig. 4 D, yet heat pipe 41 quantity is set not as limit, can reach even and good thermal conduction effect with it is primary goal, no matter therefore several heat pipes 41 are set on the implementation, its distributing position is preferable can be arranged in base plate 34 lower surfaces equably.
Please refer to the partial enlarged drawing shown in Fig. 5 A, in one embodiment, heat pipe 41 is locked in base plate 34 lower surfaces by a sheet metal 43 with at least one screw 45, and the fixed form of heat pipe 41 is not as limit.And among another embodiment shown in Fig. 5 B, heat pipe 41 makes its cross section become a flat pattern through beaing, and to increase the contact area of heat pipe 41 and base plate 34, can increase heat conducting effect thus.Fig. 5 C shows that another embodiment of the present invention adds the situation of regenerative block 47, be scheduled in the scope of part 341 at first of base plate 34 shown in Fig. 4 A to Fig. 4 D, down straight aphototropism mode set 30 more comprises a regenerative block 47, is arranged at the first predetermined part 341, and is contacted with heat pipe 41 and base plate 34.The first predetermined part 341 is provided with high-tension circuit plate 39 and therefore is the part of the relative higher temperatures of base plate 34 lower surfaces, by regenerative block 47 so that heat can conduct to heat pipe 41 more efficiently, by heat pipe 41 heat is passed on the second predetermined part 342 of relatively low temperature again, can make that thus the Temperature Distribution of down straight aphototropism mode set 30 is more even, and help heat radiation.Above-mentioned regenerative block 47 can be the metal of a copper billet, an aluminium block or other tool high conduction coefficients.In another embodiment, can utilize heat-conducting cream to coat between heat pipe 41 and the base plate 34, to promote heat conduction efficiency.
Down straight aphototropism mode set 30 provided by the present invention can be assembled according to the following step:
High-tension circuit plate 39 is set in the first predetermined part 341.
The above is about the number of assembling steps of the lower surface of base plate 34, and comprises at least about the number of assembling steps on the base plate 34:
Electrically connect light supply apparatus 32 and high-tension circuit plate 34.
Please refer to Fig. 6 A, Fig. 6 B and Fig. 6 C, Fig. 6 A is Fig. 3 liquid crystal panel top view; Fig. 6 B is Fig. 3 liquid crystal panel backplan; Fig. 6 C is Fig. 3 down straight aphototropism mode set backplan.The listed experimental data of three figure and Fig. 7 A, Fig. 7 B and Fig. 7 C is with the explanation effect that the present invention was reached thus.
Because fundamental purpose of the present invention is to improve temperature distributing disproportionation in the existing down straight aphototropism mode set 10, with and the shortcoming of the luminance nonuniformity that caused, therefore down straight aphototropism mode set 30 of the present invention and assembling liquid crystal panel 40 are thereon carried out the measurement of Temperature Distribution.This experiment is under the environment of room temperature 27.9 degree Celsius, and the down straight aphototropism mode set 30 of assembling and feeding the electric current running is carried out temperature survey with liquid crystal panel 40.Gauge point A1 to the A9 representative that Fig. 6 A shows is to each measurement position of liquid crystal panel 40 upper surfaces; Measurement dessert P1 to the P9 representative that Fig. 6 B shows is to each measurement position of liquid crystal panel 40 lower surfaces; Gauge point B1 to B9 that Fig. 6 C shows and E1 representative are to each measurement position of down straight aphototropism mode set 30 lower surfaces.
Measuring temp the results are shown in Fig. 7 A to Fig. 7 C.Fig. 7 A is the experimental data that does not have heat pipe in the down straight aphototropism mode set; Fig. 7 B is the experimental data that has heat pipe in the down straight aphototropism mode set; Fig. 7 C is Fig. 7 A and two groups of experiment other mean values of Fig. 7 B.
At first can obviously find out by Fig. 7 C, no matter be the lower surface of upper surface, lower surface or down straight aphototropism mode set 30 at liquid crystal panel 40, the present invention adds the embodiment of heat pipe 41 compared to the prior art that does not have heat pipe 41, and the present invention all has lower medial temperature.This shows that the present invention has tangible effect for the cooling-down effect of down straight aphototropism mode set 30 integral body.
And by the Temperature Distribution situation shown in Fig. 7 B, it also demonstrates the present invention has and does not have an experimental data of heat pipe 41 than Fig. 7 A better uniformity of temperature profile degree is arranged.For example, the gauge point B9 shown in Fig. 6 C is 67.2 degree (being shown in Fig. 7 A) Celsius not having a measuring temp value of heat pipe 41, and is 61.9 degree (being shown in Fig. 7 B) Celsius under the situation of tool heat pipe 41.Gauge point B9 is high-tension circuit plate 39 residing first predetermined parts 341, it is the relatively-high temperature place of base plate 34, setting by heat pipe 41 of the present invention, the temperature that can reduce the relatively-high temperature place is a lot of, therefore, can find out that the present invention improves the problem of prior art temperature distributing disproportionation really in a little thus experimental datas.
Comprehensive the above, the invention provides a kind of down straight aphototropism mode set, the light supply apparatus of wherein not only considering the confined space between base plate and the diffuser plate is provided with situation, so that uniformity of temperature profile, more carry out the design of equalizing temperature for the base plate lower surface of confined space outside, utilize the equalizing temperature effect of heat pipe, and help whole heat radiation and cooling-down effect with the reinforcement down straight aphototropism mode set.Thus, being not only the briliancy performance that down straight aphototropism mode set itself provided can be better, and the liquid crystal panel that is assembled in its top also can keep away the harmful effect that high temperature or temperature inequality are brought, and therefore, the present invention helps the lifting of image display quality.
Though the present invention illustrates as above with preferred embodiments, so it is not only to terminate in the foregoing description in order to limit the present invention's spirit with the invention entity.To being familiar with this operator, when understanding and utilize other element or mode to produce identical effect easily.Be with, the modification of being done in not breaking away from spirit of the present invention and scope all should be included in the following claim.
Claims (10)
1. a down straight aphototropism mode set is characterized in that, comprises at least:
One light supply apparatus;
One base plate, this light supply apparatus are arranged on this base plate, and it is partly predetermined with one second that this base plate lower surface can be divided into one first predetermined part;
One high-tension circuit plate is arranged at this first predetermined part, and this light supply apparatus is electrically connected at this high-tension circuit plate; And
One heat pipe is arranged at this base plate lower surface, and is second partly predetermined to this with thermal energy conduction that this high-tension circuit plate is produced.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that, that this heat pipe forms through warpage is one L shaped, a N shape or a W shape.
3. down straight aphototropism mode set as claimed in claim 1 is characterized in that, this heat pipe is to make its cross section become a flat pattern through beaing, to increase the contact area of this heat pipe and this base plate.
4. down straight aphototropism mode set as claimed in claim 1 is characterized in that, in this first predetermined partly pairing scope, this heat pipe is arranged between this base plate and this high-tension circuit plate.
5. down straight aphototropism mode set as claimed in claim 1 is characterized in that, by a sheet metal and at least one screw and this heat pipe is locked in this base plate lower surface.
6. down straight aphototropism mode set as claimed in claim 1 is characterized in that this down straight aphototropism mode set more comprises a regenerative block, is arranged at this first predetermined part, and is contacted with this heat pipe and this base plate.
7. down straight aphototropism mode set as claimed in claim 6 is characterized in that, this regenerative block is the metal of a copper billet, an aluminium block or other tool high conduction coefficients.
8. down straight aphototropism mode set as claimed in claim 1 is characterized in that, in this first predetermined partly pairing scope, a heat-conducting cream is arranged between this heat pipe and this base plate.
9. down straight aphototropism mode set as claimed in claim 1 is characterized in that, this light supply apparatus can be a cold cathode ray tube or a light emitting diode.
10. down straight aphototropism mode set as claimed in claim 1 is characterized in that, more comprises a diffusion sheet, is arranged at this light supply apparatus top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100679780A CN100376972C (en) | 2005-04-29 | 2005-04-29 | Directed-down light-negative moulding set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100679780A CN100376972C (en) | 2005-04-29 | 2005-04-29 | Directed-down light-negative moulding set |
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| Publication Number | Publication Date |
|---|---|
| CN1854845A CN1854845A (en) | 2006-11-01 |
| CN100376972C true CN100376972C (en) | 2008-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100679780A Active CN100376972C (en) | 2005-04-29 | 2005-04-29 | Directed-down light-negative moulding set |
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| CN (1) | CN100376972C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101519331B1 (en) * | 2008-02-18 | 2015-05-13 | 삼성디스플레이 주식회사 | Backlight assembly and display device having same |
| CN101949527B (en) * | 2010-09-29 | 2012-02-01 | 友达光电股份有限公司 | Radiator structure, backlight module and display device for upright use |
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| EP0402106A2 (en) * | 1989-06-07 | 1990-12-12 | Sharp Kabushiki Kaisha | A display device |
| JPH04199026A (en) * | 1990-11-29 | 1992-07-20 | Seiko Epson Corp | Back light system |
| JPH06160813A (en) * | 1992-11-16 | 1994-06-07 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2000214441A (en) * | 1999-01-26 | 2000-08-04 | Hitachi Ltd | Liquid crystal display device |
| US20020113919A1 (en) * | 2001-02-21 | 2002-08-22 | Au Optronics Corp. | Backlight module for homogenizing the temperature of a flat panel display device |
| CN1387072A (en) * | 2001-05-18 | 2002-12-25 | 三星电子株式会社 | Liquid crystal display |
| CN1398357A (en) * | 2000-12-08 | 2003-02-19 | 索尼株式会社 | Liquid crystal display device and liquid crystal projector device |
| KR20050004400A (en) * | 2003-07-02 | 2005-01-12 | 삼성전자주식회사 | Liquid crystal display apparatus |
| CN1567064A (en) * | 2003-07-04 | 2005-01-19 | 友达光电股份有限公司 | Backlight module |
| CN1603890A (en) * | 2003-09-29 | 2005-04-06 | 友达光电股份有限公司 | Liquid crystal display module |
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2005
- 2005-04-29 CN CNB2005100679780A patent/CN100376972C/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0402106A2 (en) * | 1989-06-07 | 1990-12-12 | Sharp Kabushiki Kaisha | A display device |
| JPH04199026A (en) * | 1990-11-29 | 1992-07-20 | Seiko Epson Corp | Back light system |
| JPH06160813A (en) * | 1992-11-16 | 1994-06-07 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2000214441A (en) * | 1999-01-26 | 2000-08-04 | Hitachi Ltd | Liquid crystal display device |
| CN1398357A (en) * | 2000-12-08 | 2003-02-19 | 索尼株式会社 | Liquid crystal display device and liquid crystal projector device |
| US20020113919A1 (en) * | 2001-02-21 | 2002-08-22 | Au Optronics Corp. | Backlight module for homogenizing the temperature of a flat panel display device |
| CN1387072A (en) * | 2001-05-18 | 2002-12-25 | 三星电子株式会社 | Liquid crystal display |
| KR20050004400A (en) * | 2003-07-02 | 2005-01-12 | 삼성전자주식회사 | Liquid crystal display apparatus |
| CN1567064A (en) * | 2003-07-04 | 2005-01-19 | 友达光电股份有限公司 | Backlight module |
| CN1603890A (en) * | 2003-09-29 | 2005-04-06 | 友达光电股份有限公司 | Liquid crystal display module |
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