CN2586983Y - Back light system - Google Patents
Back light system Download PDFInfo
- Publication number
- CN2586983Y CN2586983Y CN 02250132 CN02250132U CN2586983Y CN 2586983 Y CN2586983 Y CN 2586983Y CN 02250132 CN02250132 CN 02250132 CN 02250132 U CN02250132 U CN 02250132U CN 2586983 Y CN2586983 Y CN 2586983Y
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- CN
- China
- Prior art keywords
- guide plate
- light
- light guide
- incidence
- plane
- 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 - Lifetime
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Abstract
The utility model relates to a back light system, which comprises a light guide plate and at least one light source. The light guide plate comprises an incident surface, a bottom surface and an outgoing surface. The incident surface is used for receiving light beams generated by an external light source. The bottom surface is connected with the incident surface and the outgoing surface is opposite to the bottom surface, so the light beams can be guided out of the light guide plate, wherein, the bottom surface of the light guide plate is provided with a plurality of dots, and the outgoing surface is provided with a plurality of pyramid-shaped prism structures which are arranged in a uniform and regular mode. The pyramid-shaped prism structures condense the outgoing light beams and the strength of the outgoing beams of the light guide plate is enhanced.
Description
[technical field]
The utility model relates to a kind of back light system, refers to a kind of backlight liquid crystal display system that is used for especially.
[background technology]
LCD is a kind of non-self light-emitting display device, it shows it mainly is passing through or the obstructed realization of coming by control light beam that external light source sends, therefore need external light source and corresponding guiding device, this guiding device can be with the beam direction display panel that external light source sent.
A kind of prior art back light system 100 as shown in Figure 1, this back light system generally includes a light source 110, a light guide plate 120, a diffuser plate 130 and prism plate combination 140, wherein this diffuser plate 130 and prism plate combination 140 is arranged on this light guide plate 120 in regular turn, prism plate combination 140 is made of the upper and lower prism plate 142,141 that is parallel to each other, prism structure on its each prism plate is parallel to each other, the prism distribution approximate vertical of two prism plates 142,141.This light guide plate 120 can be made by polymeric resin material, as acryl resin, polycarbonate etc., shape roughly is wedge shape, it comprise a plane of incidence 121, an exit facet 122, one with exit facet 122 relative and angled bottom surfaces 123, wherein this bottom surface 123 is printed with the site (scheming not show) of a plurality of tool scatterings and reflection function by net-point printing (Dot Printing) mode.The plane of incidence 121 of this light guide plate 120 receives the light beam that is sent from sidepiece light source 110, this light beam forms the light beam evenly dispersed through the scattering of bottom surface 123 and reflection back and is derived by exit facet 122, again by shining display panel (figure does not show) after diffuser plate 130, the prism plate combination 140.But,, cause that manufacturing process is more, cost is higher because this back light system 100 adopts more, the complex structure of elements, and owing to have a plurality of interfaces between its each element, light beam is more at the order of reflection at interface, causes the beam energy loss bigger, the intensity of outgoing beam a little less than.
A kind of back light system 200 of Fig. 2 and the 6th, 123, No. 431 announcements of United States Patent (USP) that Figure 3 shows that bulletin on September 26th, 2000, it roughly is wedge shape, comprises a light source 210 and a light guide plate 220.This light guide plate 220 comprises a plane of incidence 221, an exit facet 222, and and the plane of incidence 221 an angled bottom surface 223, one and the plane of incidence 221 opposing end faces 230 relative with exit facet 222.This plane of incidence 221 receives the light beam that light source 210 is sent, these exit facet 222 non-being equally spaced along the prism structure 250 that is parallel to the plane of incidence 221 directions of light guide plate 220, the spacing of this prism structure 250 reduces gradually along the direction of the plane of incidence 221 opposing end surfaces 230, and the spacing that is positioned at the two adjacent ribs mirror structures 250 at end face 230 places is zero.This prism structure 250 and this light guide plate 220 are formed in one, and roughly are pyramid, protrude with respect to exit facet 222.This light guide plate 220 is incorporated into exit facet 222 with prism structure 250, the simplification of implementation structure.But, the bottom surface 223 of this light guide plate 220 is for the plane and be coated with reflectance coating, as the aluminium film, through the intensity distributions inequality of its beam reflected at exit facet 222, the prism structure 250 of exit facet 222 need be designed to the non-equidistance shape to revise light intensity and direction, make the light intensity of exit facet 222 even.Therefore, the design of these prism structure 250 spacings need be carried out according to exit facet 222 distribution of light intensity, and it realizes more complicated.
[utility model content]
In order to overcome prior art back light system complex structure, deficiency that light output intensity is low, the utility model provides a kind of back light system, and this back light system is simple in structure, light output intensity is higher.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of back light system is provided, and this back light system comprises a light guide plate and at least one light source.This light guide plate comprises a plane of incidence, a bottom surface and an exit facet, and this plane of incidence is used for receiving the light beam that is sent by external light source, and this bottom surface links to each other with the plane of incidence, and this exit facet is relative with the bottom surface, and light beam is derived this light guide plate.Wherein, the bottom surface of this light guide plate is distributed with a plurality of sites, the pyramid prism structure that a plurality of rules of this outgoing mask are evenly arranged.This pyramid prism structure carries out optically focused to outgoing beam, strengthens the intensity of light guide plate outgoing beam.
Compared with prior art, the utlity model has following advantage: because of the utility model back light system combines light guide plate, prism plate, make that back light system is simple in structure, cost is low, owing to adopt pyramid prism structure and corresponding site, improve light guide plate outgoing beam intensity, thereby improve the light output intensity of back light system.
[description of drawings]
Fig. 1 is a kind of three-dimensional exploded view of prior art back light system.
Fig. 2 is the stereographic map of another kind of prior art back light system.
Fig. 3 is the vertical view of prior art back light system shown in Figure 2.
Fig. 4 is the stereographic map of the utility model back light system first embodiment.
Fig. 5 is the distribution schematic diagram of the light guide plate mesh point structure of back light system shown in Figure 4.
Fig. 6 is the distribution schematic diagram of the light guide plate prism structure of back light system shown in Figure 4.
Fig. 7 is the stereographic map of the utility model back light system second embodiment.
Fig. 8 is the distribution schematic diagram of the light guide plate mesh point structure of back light system shown in Figure 7.
[embodiment]
Please refer to Fig. 4, is the stereographic map of the utility model back light system first embodiment.This back light system comprises a light guide plate 300 and is positioned at the light source 310 of light guide plate 300 1 sides.This light source 310 adopts light source covers (figure does not show) to cover on the back side of light source 310 with respect to light guide plate 300 usually, is used for improving the ratio that light beam that light source 310 sends enters light guide plate 300.The rectangular structure that this light guide plate 300 is formed in one, its material can be tygon, polycarbonate etc.This light guide plate comprises a plane of incidence 321, an exit facet 322 and a bottom surface 323, wherein, the plane of incidence 321 receives the light beam that is sent by its sidepiece light source 310, and with these light beam importing light guide plate 300 inside, beam reflection, scattering that this bottom surface 323 will import, the scattered beam that formation is evenly dispersed along all directions, this exit facet 322 is derived light guide plate 300 with this light beam of evenly dispersing, the display panels that leads (figure does not show).
Please refer to Fig. 5, bottom surface 323 is distributed with a plurality of sites of evenly arranging 324, this site 324 can be formed on the bottom surface 323 by modes such as net-point printing, texture or etchings, and its light beam with the plane of incidence 321 importings reflects, scattering, forms the light beam along the even scattering of all directions.
Please refer to Fig. 6, be evenly distributed with a plurality of prism structures 350 on the exit facet 322, this prism structure 350 roughly is pyramid, its light beam that exit facet 322 is derived converges, the outgoing beam of evenly dispersing along all directions is converged in the preset range, thereby make the outgoing beam intensity in this preset range increase, reach the purpose of high brightness.
Please refer to Fig. 7, is the stereographic map of utility model back light system second embodiment.This back light system comprises a light guide plate 400 and is positioned at the light source 410 of light guide plate 400 1 sides.This light source 410 adopts light source covers (figure does not show) to cover on the back side of light source 410 with respect to light guide plate 400 usually, in order to improve the ratio that light beam that light source 410 sends enters light guide plate 400.The sphenoid structure that this light guide plate 400 is formed in one, its material can be tygon, polycarbonate etc.This light guide plate 400 comprises a plane of incidence 421, an exit facet 422 and a bottom surface 423, and this bottom surface 423 and the plane of incidence 421 tilt to intersect.Wherein, the plane of incidence 421 receives the light beam that the light source 410 by its sidepiece sends, and with these light beam importing light guide plate 400 inside, beam reflection, scattering that this bottom surface 423 will import, the scattered beam that formation is evenly dispersed along all directions, this exit facet 322 is derived light guide plate 400 with this light beam of evenly dispersing, the display panels that leads (figure does not show).
Please refer to Fig. 8, be distributed with a plurality of sites 424 on the bottom surface 423, this site 424 can be formed on bottom surface 423 by modes such as net-point printing, texture or etchings, it is arranged to close mode along being away from light source 410 directions by dredging, the light beam that the plane of incidence 421 is imported reflects, scattering, forms the light beam along the even scattering of all directions.
For obtaining better light guide effect, can adopt the plated film mode further to strengthen the utilization factor of light beam, but the plane of incidence 321,421 and exit facet 322,422 coating anti reflection films usually, reflectance coating can be plated in bottom surface 323,423.
Claims (8)
1. back light system, comprise a light guide plate and at least one light source, this light guide plate comprises at least one plane of incidence that is used for receiving beam, a bottom surface that links to each other with the plane of incidence and one and the bottom surface is relative and the exit facet of light beam being derived this light guide plate, this at least one light source provides light beam and the plane of incidence setting of light guide plate relatively for this light guide plate, it is characterized in that: the bottom surface of this light guide plate is distributed with a plurality of sites, the pyramid prism structure that a plurality of rules of outgoing mask of this light guide plate are evenly arranged.
2. back light system as claimed in claim 1 is characterized in that: the bottom surface of this light guide plate is perpendicular to the plane of incidence.
3. back light system as claimed in claim 2 is characterized in that: the site of the bottom surface of this light guide plate is for evenly distributing.
4. back light system as claimed in claim 1 is characterized in that: the bottom surface of this light guide plate and the plane of incidence tilt to intersect.
5. back light system as claimed in claim 4 is characterized in that: the site of the bottom surface of this light guide plate along away from the light source side direction by dredging to close distribution.
6. back light system as claimed in claim 5 is characterized in that: the bottom surface of this light guide plate has reflectance coating.
7. back light system as claimed in claim 6 is characterized in that: the plane of incidence and the exit facet of this light guide plate have anti-reflective film.
8. back light system as claimed in claim 1 is characterized in that: back light system further comprises a light source cover, and this light source cover is arranged on this light source one side and partly surrounds this light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02250132 CN2586983Y (en) | 2002-12-03 | 2002-12-03 | Back light system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02250132 CN2586983Y (en) | 2002-12-03 | 2002-12-03 | Back light system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2586983Y true CN2586983Y (en) | 2003-11-19 |
Family
ID=33720422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02250132 Expired - Lifetime CN2586983Y (en) | 2002-12-03 | 2002-12-03 | Back light system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2586983Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432792C (en) * | 2006-04-19 | 2008-11-12 | 友达光电股份有限公司 | Light guide plate and back light unit employing the same |
| CN101545998B (en) * | 2008-03-28 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | Prism sheet |
| CN103091763A (en) * | 2011-10-31 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate (LGP) and light-emitting device |
| CN109856715A (en) * | 2019-04-03 | 2019-06-07 | 苏州宝瑞德纳米光学材料有限公司 | A kind of micro-prism structure and its application |
-
2002
- 2002-12-03 CN CN 02250132 patent/CN2586983Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432792C (en) * | 2006-04-19 | 2008-11-12 | 友达光电股份有限公司 | Light guide plate and back light unit employing the same |
| CN101545998B (en) * | 2008-03-28 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | Prism sheet |
| CN103091763A (en) * | 2011-10-31 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate (LGP) and light-emitting device |
| CN109856715A (en) * | 2019-04-03 | 2019-06-07 | 苏州宝瑞德纳米光学材料有限公司 | A kind of micro-prism structure and its application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121203 Granted publication date: 20031119 |