CN100371791C - Back light system - Google Patents
Back light system Download PDFInfo
- Publication number
- CN100371791C CN100371791C CNB2004100522474A CN200410052247A CN100371791C CN 100371791 C CN100371791 C CN 100371791C CN B2004100522474 A CNB2004100522474 A CN B2004100522474A CN 200410052247 A CN200410052247 A CN 200410052247A CN 100371791 C CN100371791 C CN 100371791C
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- CN
- China
- Prior art keywords
- guide plate
- hole
- back light
- light system
- light guide
- 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
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- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention relates to a backlight system which comprises a light guide plate and a light source, wherein the light guide plate is provided with a light exit surface, a bottom surface corresponding to the light exit surface and a plurality of side surfaces adjacent to the light exit surface; at least one through hole is arranged in the light guide plate and is adjacent to the side surfaces; the through hole comprises an inlet and an outlet, and the inlet and the outlet are positioned on the side surfaces. The light source is formed by filling fluorescent powder, mercury and inert gas in the through hole and respectively adding electrodes at both ends.
Description
[technical field]
The present invention relates to a kind of backlight liquid crystal display system that is applied to.
[background technology]
LCD is mainly used in various information, communication, the consumer products, as personal computer, LCD TV, mobile phone, picture telephone, PDA etc.Because panel of LCD itself does not have the characteristics of luminescence, need back light system to provide evenly and the planar light of high brightness, to obtain good visual effect for it.
A kind of prior art back light system as shown in Figure 1.This back light system 10 comprises a light guide plate 1, be positioned at the reflecting plate 2 of these light guide plate 1 bottom surface 11 1 sides, be positioned at diffuser plate 3, the light source 6 and the light source cover 7 that are positioned at light guide plate 1 incidence surface 13 1 sides of light guide plate 1 light-emitting face 12 1 sides and be positioned at the digonous runner plate 4,5 of diffusion sheet 3 one sides, wherein this light source cover 7 is generally half arc, and its part is surrounded this light source 6 to reflect the light beam that this light source 6 sends.During work, divide 7 reflections of process light source cover to enter light guide plate 1 from the beam portion of light source 6 outgoing, another part is directly into being incident upon light guide plate 1, this light beam becomes emergent light comparatively uniformly in 3 outgoing of light guide plate 1 transmission back self-diffusion plate, and this prism plate 4,5 can be assembled the briliancy of the light beam of self-diffusion plate 3 outgoing with the raising emergent light, thereby improves the LCD briliancy of (figure does not show).
But the assembly of this back light system 10 is more, not only make its complex structure, increase its cost, and follow-up assembling is also inconvenient.In addition; these light source cover 7 parts are surrounded this light source 6; and it is in conjunction with the side that is positioned at light guide plate 1; therefore the volume of this back light system 10 is bigger; and this light source cover 7 produces the space with the regular meeting that combines of light source 6; therefore segment beam is revealed and will be produced the luminous energy loss, thereby reduces the briliancy of these back light system 10 emergent lights, and then reduces the briliancy of LCD.
[summary of the invention]
For back light system complex structure, the inconvenient defective of assembling that overcomes prior art, the invention provides a kind of back light system of ease of assembly.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of back light system is provided, it comprises a light guide plate and a light source, this light guide plate has an exiting surface, one and exiting surface opposed bottom surface and a plurality of sides adjacent with exiting surface, and contiguous these a plurality of sides are provided with at least one through hole in light guide plate, this through hole comprises an inlet and an outlet, and this inlet and outlet are positioned at this a plurality of sides; This light source is to charge into fluorescent powder, mercury and inert gas in this through hole, and adds electrode respectively at two ends and form.
In addition, the side parallel with through hole of this light guide plate can be provided with the reflectance coating of high reflectance, and this exiting surface has at least one reflectance coating with high reflectance parallel with this through hole.
Compared with prior art, light guide plate is provided with at least one through hole in order to built-in light source in the back light system of the present invention, therefore can omit light source cover, not only makes assembly minimizing in the back light system, and makes it easy to assembly.In addition, this light source is arranged at the inside of light guide plate, can the light beam that light source sends be transmitted in light guide plate fully by the reflectance coating that light guide plate side and exiting surface are provided with high reflectance, therefore avoid in the prior art segment beam to reveal and to produce luminous energy loss problem, thereby improve the briliancy of this back light system emergent light.
[description of drawings]
Fig. 1 is a kind of front view of prior art back light system.
Fig. 2 is the stereographic map of back light system first embodiment of the present invention.
Fig. 3 is the stereographic map of back light system second embodiment of the present invention.
Fig. 4 is the stereographic map of back light system the 3rd embodiment of the present invention.
[embodiment]
Seeing also Fig. 2, is the synoptic diagram of back light system first embodiment of the present invention.This back light system 30 comprises that a light guide plate 32 and is arranged at the reflectance coating 36 of light guide plate 32 belows, and this light guide plate 32 has an exiting surface 328, one and exiting surface 328 opposed bottom surface 327 and the side 324,325,326 and 329 adjacent with this bottom surface 327.These light guide plate 32 inner contiguous sides 326 are provided with a through hole 33, this through hole 33 comprises an inlet 331 and one outlet 333, this inlet 331 lays respectively at relative two sides 325,329 with outlet 333, i.e. 33 one-tenth I fonts of this through hole, charge into fluorescent powder 332, mercury 334 and inert gas 336 in this through hole 33, its two ends add electrode 338 respectively, and this two end electrodes 338 is provided with lead 341 respectively, thus the light guide plate 32 of formation and light source one.
Wherein this light guide plate 32 is a wedge shape, and the width of its side 326 is greater than the width of side 324.The material of this light guide plate 32 is a methacrylic resin.These light guide plate 32 general hot-forming (Injection Molding) technologies that adopt are made.
The light source (figure does not show) that is built in this light guide plate 32 is cold cathode fluorescent lamp (ColdCathode Fluorescent Lamp, CCFL), this through hole 33 is adjacent to this side 326 and is provided with, and is built in the lead 341 (figure only shows one) and power supply (figure does not show) coupling of two opposite end faces of the light source of this light guide plate 32 by this.
Wherein this side 324,325,326,329 can be provided with the reflectance coating that reflectivity is 98% high reflectance (figure does not show), preventing light beam from this side outgoing, and then effectively prevents the loss of luminous energy, strengthens the bright dipping briliancy of this back light system 30.
Wherein this bottom surface 327 can be provided with scattering point (figure do not show) and with the total reflection condition of broken beam, makes outgoing beam more even.The size of each scattering point is to increase progressively along the direction away from this light source 34, and it is near more from light source, and its size is more little and distribute thin more; Far away more from light source, its size is big more and distribute close more.This scattering point array can be passed through light guide plate 32 ejection formations, also can print with print process to form.
In addition, more even for the light that makes exiting surface 328 outputs, a diffusion sheet (figure does not show) can be set on this exiting surface 328.
Second embodiment of back light system of the present invention as shown in Figure 3, itself and Fig. 2 difference are that this back light system 40 comprises a plate light guide plate 42, these light guide plate 42 inside have two through hole 43, charge into a fluorescent powder 432 in it, one mercury 434 and an inert gas 436, two ends add electrode 438 respectively, make light source and light guide plate 42 integrated, this two through hole 43 lays respectively at and is adjacent to this light guide plate 42 sides 421,422 sides, and this exiting surface 423 comprises first area 4231, second area 4232 and the 3rd zone 4233, wherein this three zone links to each other and first area 4231 and the 3rd zone 4232 lay respectively at contiguous corresponding side surface 421 and 422 places and be arranged in parallel with this through hole 43, reflection horizon with high reflectance is set on it, its effect is that the beam reflection that light source sends is entered transmission in the light guide plate 42, so that outgoing beam is comparatively even.
The 3rd embodiment of back light system of the present invention as shown in Figure 4, itself and Fig. 2 difference are that this back light system 50 comprises a plate light guide plate 52, these light guide plate 52 inside have L type through hole 53, this through hole comprises an inlet 531 and one outlet 533, this inlet 531 lays respectively at adjacent two sides 525,526 with outlet 533, charge into fluorescent powder 532, mercury 534 and inert gas 536 in this through hole 53, its two ends add electrode 538 respectively, make light source and light guide plate 52 integrated, this L type through hole 53 is positioned at and is adjacent to this light guide plate 52 sides 521,522 sides.
In addition, back light system of the present invention is not limited to first embodiment, second embodiment and the 3rd embodiment, wherein, this through hole also can be the U type, promptly this through hole inlet is positioned at the same side with outlet, the material of this light guide plate generally can be the resin material with good light penetration and gets final product, as polycarbonate, polystyrene, methyl methacrylate and cinnamic copolymer resin, the noncrystalline cyclic olefin polymer, polypropylene, tygon, the thermoplastic resin of melting moulding such as thermoplastics type's vibrin, the inert gas that charges into through hole gets final product with gas for generally making fluorescent tube, as neon, helium or argon gas etc., each scattering point that is provided with scattering point can be point-like, square, spherical shape, cylindric, shape such as square or pyramid, exiting surface have a high-reflection region territory corresponding to through hole at least.
Claims (10)
1. back light system, comprise a light guide plate and a light source, this light guide plate has an exiting surface, one and exiting surface opposed bottom surface and a plurality of sides adjacent with exiting surface, and contiguous these a plurality of sides are provided with at least one through hole in light guide plate, this through hole comprises an inlet and an outlet, this inlet and outlet are positioned at this a plurality of sides, it is characterized in that: this light source is to charge into fluorescent powder, mercury and inert gas in this through hole, and adds electrode respectively at two ends and form.
2. back light system as claimed in claim 1 is characterized in that: this through hole inlet lays respectively at two relative sides with outlet.
3. back light system as claimed in claim 2 is characterized in that: this light source becomes the I font.
4. back light system as claimed in claim 1 is characterized in that: this through hole inlet lays respectively at two adjacent sides with outlet.
5. back light system as claimed in claim 4 is characterized in that: this light source becomes the L font.
6. back light system as claimed in claim 1 is characterized in that: this through hole inlet lays respectively at the same side with outlet.
7. back light system as claimed in claim 6 is characterized in that: this light source becomes the U font.
8. back light system as claimed in claim 1 is characterized in that: this exiting surface has a high-reflection region territory corresponding to through hole at least.
9. back light system as claimed in claim 1 is characterized in that: it is 98% reflectance coating that these a plurality of sides are provided with reflectivity.
10. back light system as claimed in claim 1 is characterized in that: this inert gas is neon, argon gas or helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100522474A CN100371791C (en) | 2004-11-09 | 2004-11-09 | Back light system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100522474A CN100371791C (en) | 2004-11-09 | 2004-11-09 | Back light system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1773343A CN1773343A (en) | 2006-05-17 |
| CN100371791C true CN100371791C (en) | 2008-02-27 |
Family
ID=36760388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100522474A Expired - Fee Related CN100371791C (en) | 2004-11-09 | 2004-11-09 | Back light system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371791C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467503A (en) * | 2015-12-31 | 2016-04-06 | 厦门天马微电子有限公司 | Light guide plate and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803399A (en) * | 1985-08-14 | 1989-02-07 | Hitachi, Ltd. | Fluorescent lamp arrangement for uniformly illuminating a display panel |
| US5619351A (en) * | 1992-07-13 | 1997-04-08 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
| JPH09145935A (en) * | 1995-11-28 | 1997-06-06 | Mitsubishi Electric Corp | Back lighting device |
| CN2769940Y (en) * | 2004-12-25 | 2006-04-05 | 群康科技(深圳)有限公司 | Back light system |
-
2004
- 2004-11-09 CN CNB2004100522474A patent/CN100371791C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803399A (en) * | 1985-08-14 | 1989-02-07 | Hitachi, Ltd. | Fluorescent lamp arrangement for uniformly illuminating a display panel |
| US5619351A (en) * | 1992-07-13 | 1997-04-08 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
| JPH09145935A (en) * | 1995-11-28 | 1997-06-06 | Mitsubishi Electric Corp | Back lighting device |
| CN2769940Y (en) * | 2004-12-25 | 2006-04-05 | 群康科技(深圳)有限公司 | Back light system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1773343A (en) | 2006-05-17 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 Termination date: 20151109 |
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| EXPY | Termination of patent right or utility model |