CN1289953C - Light negative module with LED - Google Patents
Light negative module with LED Download PDFInfo
- Publication number
- CN1289953C CN1289953C CN 03141253 CN03141253A CN1289953C CN 1289953 C CN1289953 C CN 1289953C CN 03141253 CN03141253 CN 03141253 CN 03141253 A CN03141253 A CN 03141253A CN 1289953 C CN1289953 C CN 1289953C
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- Prior art keywords
- emitting diode
- light emitting
- light source
- light
- circuit
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Abstract
The present invention relates to a backlight module with light emitting diodes. The present invention comprises a driving circuit board, a first circuit, a second circuit and a reflecting board, wherein the driving circuit board comprises a first region block and a second region block; the first circuit comprises a plurality of first light sources and a plurality of second light sources, the first light sources are arranged at the first region block, and the second light sources are arranged at the second region block; the second circuit comprises a plurality of third light sources and a plurality of fourth light sources, the third light sources are arranged at the first region block, and the fourth light sources are arranged at the second region block; the reflecting board is arranged above the driving circuit board and has a convex structure. The first light sources, the second light sources, the third light sources and the fourth light sources are arranged above the convex structure.
Description
Technical field
The present invention is relevant for a kind of backlight module that has light emitting diode, particularly relevant in a kind of being applied to, the backlight module of large scale flat-panel screens.
Background technology
Along with the flat-panel screens development of technology, at present flat-panel screens gradually with in, large-sized flat-panel screens is its main flow.Yet, proceed to the process of large size panel from the small size panel, still have many technical matterss to overcome.
Because the quality of each white light emitting diode is uneven, how variant internal driving is, therefore, when utilize this type of light emitting diode be arranged in, during the backlight module of large scale flat-panel screens, the problem of brightness irregularities will take place in display.Represented as Fig. 1, traditional light emitting diode arrangement mode is served as reasons and is provided with light emitting diode 111,112 circuit 110 and be provided with light emitting diode 121,122 circuit 120 provides flat-panel screens zone A and the required brightness of area B respectively, because circuit 110 and circuit 120 are arranged with parallel way, when light emitting diode 111,112 impedance summation is greater than light emitting diode 121, during 122 impedance summation, the electric current that flows through circuit 110 will be less, so light emitting diode 111,112 brightness meeting is less, causes the regional A of flat-panel screens darker than area B.When the size of flat-panel screens hour, the situation of brightness disproportionation is still not serious, but after size strengthened gradually, light emitting diode set on the single circuit increased, the difference of then impedance summation will be bigger, thereby make the effect of brightness disproportionation more obvious.In addition, the general closed planar display only provides enough brightness in its direction of facing display, if the angle that the user watches departs from positive visual angle slightly, then its brightness of the image that eyes received will be lowered.During this shortcoming is present in, large-sized flat-panel screens, and its degree is with even more serious.
Therefore design a kind of backlight module that can provide tool uniform luminance, wide viewing angle to have light emitting diode, and then solve above-mentioned technical matters.
Summary of the invention
The present invention is promptly in order to solve the problem of above-mentioned known technology, and a kind of backlight module that has light emitting diode that provides.It comprises one drive circuit plate, one first circuit, a second circuit and a reflecting plate.Drive circuit board comprises one first block and one second block.First circuit comprises a plurality of first light emitting diodes and a plurality of second light emitting diode, and first light emitting diode is located at first block, and first light emitting diode is located at second block.One second circuit, second circuit comprise a plurality of the 3rd light emitting diodes and a plurality of the 4th light emitting diode.First light emitting diode is located at this first block, and the 4th light emitting diode is located at this second block.This first circuit and this second circuit are connected to a supply unit.Reflector is located on the drive circuit board, and reflector has a convex structure.And first light emitting diode, second light emitting diode, the 3rd light emitting diode and the 4th light emitting diode promptly are located on the convex structure.
Use the backlight module that has light emitting diode of the present invention, LCD uniform luminance, wide viewing angle light source can be provided.The user can be from different directions, different angles watch even, the high-resolution picture of brightness.
Description of drawings
Fig. 1 shows known light emitting diode arrangement notion circuit diagram;
Fig. 2 is that the expression light source that has the backlight module of light emitting diode of the present invention is arranged the notion circuit diagram;
Fig. 3 is the expression structural representation that has the backlight module of light emitting diode of the present invention;
Fig. 4 a is the vertical view of the convex structure of the expression backlight module that has a light emitting diode of the present invention;
Fig. 4 b is the side view of the convex structure of the expression backlight module that has a light emitting diode of the present invention;
Fig. 5 is that the expression light source that has the backlight module of light emitting diode of the present invention is arranged circuit diagram.
Symbol description:
110,120: circuit 111,112,121,122: light emitting diode
211: the first light sources of 210: the first circuit
212: secondary light source 220: second circuit
224: the four light sources of 223: the three light sources
230: drive circuit board 240: reflecting plate
250: 251: the first side surfaces of convex structure
253: the three side surfaces of 252: the second side surfaces
254 the 4th side surfaces 255: upper surface
260: light guide plate 261: the light inlet side
262: groove 270: light source
310,320 ..., 350: circuit
311,312 ..., 315: light source
321,322 ..., 325: light source
331,332 ..., 335: light source
341,342 ..., 345: light source
351,352 ..., 355: light source
361,362 ..., 365: the convex structure
Embodiment
With reference to Fig. 2, circuit design notion for light source of the present invention, it is located on the one drive circuit plate 230 for the second circuit 220 that will be provided with first circuit 210 of first light source 211, secondary light source 212 and be provided with the 3rd light source 223, the 4th light source 224, provide flat-panel screens required light source jointly, drive circuit board 230 comprises the first block A ' and the second block B '.First light source 211 and the 3rd light source 223 are located at the first block A ', to provide flat-panel screens in the required light source of respective regions.The 4th light source 224 and secondary light source 212 are located at the second block B ', to provide flat-panel screens in the required light source of respective regions.Therefore, although first circuit 210 and second circuit 220 are because its internal driving summation difference, and cause first light source 211, secondary light source 212 bright than the 3rd light source 223, the 4th light source 224, or the 3rd light source 223, the 4th light source 224 situation bright than first light source 211, secondary light source 212, use the design concept of this circuit arrangement, it can carry out the light source of flat-panel screens balanced well the setting, reaches the flat-panel screens backlight module with uniform source of light effect.
Above-mentioned light source can be the light emitting diode of any color.
Above-mentioned first circuit 210 and second circuit 220 can be connected in parallel to a supply unit (not shown).
The above-mentioned backlight module that has light emitting diode can be a bottom-lighting type back light module or a side light type back light module.
With reference to Fig. 3, the backlight module that has light emitting diode of the present invention on above-mentioned drive circuit board 230, can be established a reflecting plate 240 and a light guide plate 260 in addition.On the reflecting plate 240 convex structure 250 can be set, light source 270 promptly is located on the convex structure 250.Light guide plate 260 has a light inlet side 261, and a groove 262, and groove 262 is formed at the position of corresponding light source.
Above-mentioned light source 270 means the general name of the light source of the backlight module that has a light emitting diode of the present invention, and the set of the light source of each different circuit is located in its representative.
With reference to Fig. 4 a, 4b, be the enlarged drawing of expression convex structure 250 of the present invention.In this convex structure 250 is a wedge structure, and it comprises a upper surface 255, one first side surfaces 251, one second side surface 252, one the 3rd side surface 253 and one the 4th side surface 254.And light source 270 promptly is located on upper surface 255, the first side surfaces 251, second side surface 252, the 3rd side surface 253 and the 4th side surface 254.So that the light source of multi-angleization to be provided.
Above-mentioned wedge structure can also comprise the side more than four, so that the light source of more perspective to be provided.
The circuit arrangement notion setting that light source 270 promptly utilizes above-mentioned Fig. 2 is explained, its can one the convex structure be a unit or be a unit with a zone.With reference to Fig. 5, it has represented convex structure 361,362,363,364,365, and circuit 310,320,330,340,350.Circuit 310 is provided with light source 311,312,313,314,315, and light source 311 is located at convex structure 361, and light source 312 is located at convex structure 362, and light source 313 is located at convex structure 363, and light source 314 is located at convex structure 364, and light source 315 is located at convex structure 365.Same, circuit 320 is provided with light source 321,322,323,324,325, and light source 321 is located at convex structure 361, light source 322 is located at convex structure 362, light source 323 is located at convex structure 363, and light source 324 is located at convex structure 364, and light source 325 is located at convex structure 365.Circuit 330 is provided with light source 331,332,333,334,335, and light source 331 is located at convex structure 361, and light source 332 is located at convex structure 362, and light source 333 is located at convex structure 363, and light source 334 is located at convex structure 364, and light source 335 is located at convex structure 365.Circuit 340 is provided with light source 341,342,343,344,345, and light source 341 is located at convex structure 361, and light source 342 is located at convex structure 362, and light source 343 is located at convex structure 363, and light source 344 is located at convex structure 364, and light source 345 is located at convex structure 365.Circuit 350 is provided with light source 351,352,353,354,355, and light source 351 is located at convex structure 361, and light source 352 is located at convex structure 362, and light source 353 is located at convex structure 363, and light source 354 is located at convex structure 364, and light source 355 is located at convex structure 365.
Above-mentioned light source 311-315,321-325,331-335,341-345,351-355 do not need to be located at the respective surfaces of convex structure 361-365, for example light source 311 can be located at the upper surface of convex structure, light source 312 can be located at the side surface of convex structure, to reach the target of uniform luminance.
With the design of the average formula circuit arrangement of electric current of the present invention notion, it also can not take the convex structure is the unit, and the surface of flat-panel screens is divided into several zones, with etc. the subregion as dispensing unit, and reach the effect of uniform light.
Use the present invention, can provide LCD even, the wide-angle light source.The user can view and admire even, the high-resolution picture of brightness from various angles.
Though the present invention in preferred embodiment openly as above; right its is not in order to limit the present invention; any this area skill personnel; under the situation that does not break away from the spirit and scope of the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (7)
1. backlight module that has light emitting diode comprises:
One drive circuit plate, this drive circuit board comprise one first block and one second block;
One first circuit, this first circuit comprise one first light emitting diode and one second light emitting diode of series connection, and this first light emitting diode is located at this first block, and this second light emitting diode is located at this second block; And
One second circuit, this second circuit comprise one the 3rd light emitting diode and one the 4th light emitting diode of series connection, and the 3rd light emitting diode is located at this first block, and the 4th light emitting diode is located at this second block;
This first circuit and this second circuit are connected to a supply unit.
2. the backlight module that has light emitting diode as claimed in claim 1, wherein backlight module comprises this supply unit.
3. the backlight module that has light emitting diode as claimed in claim 1, wherein, this backlight module that has light emitting diode more comprises a light guide plate, this light guide plate comprises a light inlet side, and this light inlet side is towards this first light emitting diode, this second light emitting diode, the 3rd light emitting diode and the 4th light emitting diode.
4. the backlight module that has light emitting diode as claimed in claim 3, wherein, this light guide plate has more a groove, be located at this light inlet side, this groove is formed on this light inlet side mutually should first light emitting diode, the position of this second light emitting diode, the 3rd light emitting diode and the 4th light emitting diode.
5. the backlight module that has light emitting diode as claimed in claim 1, wherein, this backlight module that has light emitting diode more comprises a reflecting plate, this reflecting plate is located at this drive circuit board surface.
6. the backlight module that has light emitting diode as claimed in claim 1, wherein, this backlight module that has light emitting diode is a bottom-lighting type back light module.
7. the backlight module that has light emitting diode as claimed in claim 1, wherein, this backlight module that has light emitting diode is a side light type back light module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141253 CN1289953C (en) | 2003-06-04 | 2003-06-04 | Light negative module with LED |
| CNB200610106153XA CN100390640C (en) | 2003-06-04 | 2003-06-04 | Light-negative module with light-emitting diodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141253 CN1289953C (en) | 2003-06-04 | 2003-06-04 | Light negative module with LED |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610106153XA Division CN100390640C (en) | 2003-06-04 | 2003-06-04 | Light-negative module with light-emitting diodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1553261A CN1553261A (en) | 2004-12-08 |
| CN1289953C true CN1289953C (en) | 2006-12-13 |
Family
ID=34323971
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03141253 Expired - Lifetime CN1289953C (en) | 2003-06-04 | 2003-06-04 | Light negative module with LED |
| CNB200610106153XA Expired - Lifetime CN100390640C (en) | 2003-06-04 | 2003-06-04 | Light-negative module with light-emitting diodes |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610106153XA Expired - Lifetime CN100390640C (en) | 2003-06-04 | 2003-06-04 | Light-negative module with light-emitting diodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1289953C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839420B (en) | 2009-03-20 | 2013-05-29 | 北京京东方光电科技有限公司 | Back light module |
| EP2470947B1 (en) * | 2009-08-27 | 2016-03-30 | LG Electronics Inc. | Optical assembly, backlight unit and display apparatus thereof |
| EP2470948A4 (en) * | 2009-08-27 | 2013-06-26 | Lg Electronics Inc | Optical assembly, backlight unit, and display device |
| CN106054454B (en) * | 2016-08-09 | 2019-06-21 | 京东方科技集团股份有限公司 | A kind of back light source structure and its control method, backlight module, display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11273436A (en) * | 1998-03-25 | 1999-10-08 | Hitachi Chem Co Ltd | Back light device |
| JP2001133757A (en) * | 1999-11-02 | 2001-05-18 | Seiko Epson Corp | Liquid crystal display module |
| JP2003036715A (en) * | 2001-07-23 | 2003-02-07 | Toshiba Corp | Surface light source device and liquid crystal display device |
| TWI232335B (en) * | 2001-11-19 | 2005-05-11 | Chi Mei Optoelectronics Corp | Multi-angle reflection plate for direct type backlight module |
-
2003
- 2003-06-04 CN CN 03141253 patent/CN1289953C/en not_active Expired - Lifetime
- 2003-06-04 CN CNB200610106153XA patent/CN100390640C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN100390640C (en) | 2008-05-28 |
| CN1553261A (en) | 2004-12-08 |
| CN1896841A (en) | 2007-01-17 |
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