CN1549020A - Back light system - Google Patents
Back light system Download PDFInfo
- Publication number
- CN1549020A CN1549020A CNA03126672XA CN03126672A CN1549020A CN 1549020 A CN1549020 A CN 1549020A CN A03126672X A CNA03126672X A CN A03126672XA CN 03126672 A CN03126672 A CN 03126672A CN 1549020 A CN1549020 A CN 1549020A
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- CN
- China
- Prior art keywords
- light source
- light
- guide plate
- back light
- light system
- 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.)
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- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to one kind of back light system for LCD. The back light system includes one light guiding board and at least one light source located on the side end of the light guiding board. The light guiding board has one outgoing plane, one bottom plane opposite to the outgoing plane and one side plane adjacent to the outgoing plane. There is at least one through hole set adjacent to the side plane and the light source with wires set to its ends is held inside the through hole. The outgoing plane has at least one high reflectivity area set.
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 PC, 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.
The back light system of prior art as shown in Figure 1, this back light system 10 comprises light guide plate 1, be positioned at the reflecting plate 2 of 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 prism plate 4,5 of two homeotropic alignments 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 and reflected 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 incident on light guide plate 1, this light beam becomes emergent light comparatively uniformly in light guide plate 1 transmission back from diffuser plate 3 outgoing, and this prism plate 4,5 can be assembled from the light beam of diffuser plate 3 outgoing improving the briliancy of emergent light, thereby improves the LCD briliancy of (figure does not show).Yet element is more in this back light system 10, not only make its complex structure, and cost is higher.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, make that the volume of this back light system 10 is bigger, and this light source cover 7 can produce the space with combining of light source 6, cause segment beam to be revealed, produce the luminous energy loss, thereby make this back light system 10 and use the briliancy of the LCD of this back light system to reduce.
[summary of the invention]
In order to overcome prior art back light system complex structure, cost height and the low defective of bright dipping briliancy, the invention provides a kind of simple in structure, low high back light system of bright dipping briliancy that reaches of cost.
The technical scheme that technical solution problem of the present invention is adopted is: a back light system is provided, it comprises a light guide plate and at least one light source that is positioned at this light guide plate side, this light guide plate has an exiting surface, one and this exiting surface opposed bottom surface and the side adjacent with this exiting surface, contiguous this side is provided with at least one through hole, these light source two ends are provided with lead respectively, wherein this light source is contained in this through hole, and this exiting surface has at least one zone that high reflectance is set.
In addition, the side of this light guide plate is provided with the reflectance coating of high reflectance.
Compared with prior art, the invention has the beneficial effects as follows: light guide plate is provided with at least one through hole and is used for accommodating this light source in the back light system of the present invention, therefore can omit light source cover, not only makes element minimizing, simple in structure in the back light system, and reduces its cost.In addition, this light source is arranged on the inside of light guide plate, can the reflectance coating of high reflectance be set and the light beam that the zone of high reflectance light source is sent be set by the light guide plate side and reflex in the light guide plate fully and transmit at exiting surface, 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 the schematic perspective 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.
[embodiment]
See also Fig. 2, back light system 30 of the present invention comprises that a light guide plate 32 and is arranged at the reflecting plate 36 of light guide plate 32 belows, and these light guide plate 32 inside have a through hole 33, and it accommodates a light source 34.This light guide plate 32 has an exiting surface 328, one and these exiting surface 328 opposed bottom surface 327 and the side 324,325,326 and 329 adjacent with this bottom surface 327.
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 general resin material with good light penetration that adopts of the material of this light guide plate 32 is as the thermoplastic resin of melting moulding such as methacrylic resin, polycarbonate, polystyrene, methyl methacrylate and cinnamic copolymer resin, noncrystalline cyclic olefin polymer, polypropylene, tygon, thermoplastics type's vibrin.Wherein, the material of optimizing is a methacrylic resin, and it is the polymkeric substance based on methyl methacrylate, and it can form multipolymer with alkylacrylates such as other resin such as methacrylate, ethyl propylene acid esters.These light guide plate 32 general ejection formation (Injection Molding) technologies that adopt are made.
This light source 34 is cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), this through hole 33 is adjacent to this side 326 and is provided with, and its diameter can be slightly larger than this light source 34, the lead 341 (figure only shows one) and power supply (figure does not show) coupling of two opposite end faces by this light source 34.Wherein this side 325,326 and 329 is provided with the groove 3261 that communicates, and it is used for accommodating this lead 341.This lead 341 can adopt the mode of cohering to be retained in this groove 3261, and then light source 34 is retained in this through hole 33.
In addition, this light source 34 also can adopt two opposite end face sides at this light source 34 that light source holding body (figure does not show) further is set with the fixing mode of this through hole 33, and it is the elasticity holding body, is used for light source 34 is retained in this through hole 33.
This exiting surface 328 comprises first area 3281 and the second area 3282 that links to each other with the first area, these 3281 contiguous these sides 326, first area, reflection horizon with high reflectance is set on it, its effect is light source 34 to be sent beam reflection enter transmission in the light guide plate 32, so that outgoing beam is comparatively even.This reflection horizon can be titanium dioxide coating or the contour reflective particle of silicon dioxide, also can adopt the plated film mode with titania or silica deposit on this zone 3281, to form the specific wavelength reflection more than 98%.Groove array (figure do not show) can be set on this second area 3282, and the cross section of each groove can be V-arrangement, shape such as trapezoidal, circular-arc in this groove array.This groove array and light guide plate 32 one ejection formations, method manufacturings such as also available chemical etching texture method, laser direct-writing method, precision optical machinery processing method.
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.
This bottom surface 327 can be provided with scattering point array (figure does not show) with the total reflection condition of broken beam, makes outgoing beam more even.This each scattering point can be shapes such as microprism shape, point-like, square, spherical shape, cylindric, square or pyramid.The size of each scattering point is to increase progressively arrangement along the direction away from this light source 34, and it is near more from light source 34, and its size is more little and distribute thin more; Far away more from light source 34, its size is big more and distribute close more.This scattering point array can penetrate by light guide plate 32 ejection formation one, and also available print process is printed and formed.
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 backlight module of the present invention as shown in Figure 3, itself and the first embodiment difference are that this back light system 40 comprises a plate light guide plate 42, two through hole 43 and be retained on light source 44 in this through hole 43, this two through hole 43 lays respectively at and is adjacent to this light guide plate 42 sides 421,422 1 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 421,422 places, enter transmission in the light guide plate 42 light source 44 is sent beam reflection, so that outgoing beam is comparatively even.
Claims (9)
1. back light system, comprise a light guide plate and at least one light source that is arranged on this light guide plate one side, this light guide plate comprises an exiting surface, one and exiting surface opposed bottom surface and the side adjacent with exiting surface, the two ends of this light source are provided with lead respectively, it is characterized in that: contiguous this side is provided with at least one through hole, this light source is contained in this through hole, and this exiting surface has at least one zone that high reflectance is set.
2. back light system as claimed in claim 1 is characterized in that: this region adjacent is in this side.
3. back light system as claimed in claim 1 is characterized in that: this side is provided with groove to accommodate this lead.
4. back light system as claimed in claim 1 is characterized in that: this light source further comprises a light source holding body in order to this light source of fixing.
5. back light system as claimed in claim 1 is characterized in that: this side has the reflectance coating of high reflectance.
6. back light system as claimed in claim 1 is characterized in that: this light guide plate is plate or wedge type.
7. back light system as claimed in claim 1 is characterized in that: this exiting surface is provided with groove array.
8. back light system as claimed in claim 7 is characterized in that: the cross section of each groove can be V-arrangement, trapezoidal, circular-arc in this groove array.
9. back light system as claimed in claim 1 is characterized in that: this bottom surface is provided with the scattering point array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03126672XA CN1549020A (en) | 2003-05-23 | 2003-05-23 | Back light system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03126672XA CN1549020A (en) | 2003-05-23 | 2003-05-23 | Back light system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1549020A true CN1549020A (en) | 2004-11-24 |
Family
ID=34321963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA03126672XA Pending CN1549020A (en) | 2003-05-23 | 2003-05-23 | Back light system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1549020A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010003273A1 (en) * | 2008-07-08 | 2010-01-14 | 海立尔股份有限公司 | Flexible backlight module |
| CN101598297B (en) * | 2009-06-26 | 2011-08-10 | 达运精密工业（苏州）有限公司 | Light guide plate, backlight module and liquid crystal display device |
| TWI393956B (en) * | 2008-06-25 | 2013-04-21 | Helio Optoelectronics Corp | Flexible backlight module structure |
| CN105717707A (en) * | 2016-04-28 | 2016-06-29 | 鄂尔多斯市源盛光电有限责任公司 | Backlight module and liquid display device |
-
2003
- 2003-05-23 CN CNA03126672XA patent/CN1549020A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI393956B (en) * | 2008-06-25 | 2013-04-21 | Helio Optoelectronics Corp | Flexible backlight module structure |
| WO2010003273A1 (en) * | 2008-07-08 | 2010-01-14 | 海立尔股份有限公司 | Flexible backlight module |
| CN101598297B (en) * | 2009-06-26 | 2011-08-10 | 达运精密工业（苏州）有限公司 | Light guide plate, backlight module and liquid crystal display device |
| CN105717707A (en) * | 2016-04-28 | 2016-06-29 | 鄂尔多斯市源盛光电有限责任公司 | Backlight module and liquid display device |
| CN105717707B (en) * | 2016-04-28 | 2019-06-28 | 鄂尔多斯市源盛光电有限责任公司 | A kind of backlight module and liquid crystal display device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |