CN1506729A - Planar light source structure - Google Patents
Planar light source structure Download PDFInfo
- Publication number
- CN1506729A CN1506729A CNA021540837A CN02154083A CN1506729A CN 1506729 A CN1506729 A CN 1506729A CN A021540837 A CNA021540837 A CN A021540837A CN 02154083 A CN02154083 A CN 02154083A CN 1506729 A CN1506729 A CN 1506729A
- Authority
- CN
- China
- Prior art keywords
- light source
- guide plate
- source structure
- light
- flat
- 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.)
- Granted
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The planar light source structure includes two light sources and two wedged light guiding boards connected to each other. Each of the wedged light guiding boards has one converting plane to convert the light beams from the two light sources in one end of the light guiding board separately to the same direction in near perpendicular mode. The two wedged light guiding boards are connected to form turned-V bevels or curved surfaces to raise the brightness of planar light source.
Description
Technical field:
The present invention relates to a kind of structure of flat light source, particularly relate to a kind of flat light source structure in conjunction with two wedge type light guide plate.
Background technology
In many display device, need flat light source, for example LCD or scanner.Major part is a pointolite in conventional lighting sources, for example light emitting diode or incandescent lamp bulb.And some light source is a wire, for example the cold cathode fluorescent tube.Use flat light source if desired, a kind of mode is that top pointolite is arranged in array, or the line source that forms a line.Yet the electricity wasting that this mode is not only suitable is for also being quite disadvantageous in the consideration of cost.
A kind of mode that forms flat light source is to use light guide plate (light guide plate).Shown in Figure 1A and Figure 1B, present most light guide plate is respectively wedge type (wedge) plate 10 or dull and stereotyped 20.No matter be the wedge type plate of Figure 1A or the flat board of Figure 1B, the light source 12,22 that all light guide plate all will be positioned at end surfaces imports light guide plate 10,20, utilizes V-type tangent plane or site that light source is up derived again.At present, many improvement are arranged,, use a water chestnut mirror to be positioned on the light guide plate to prevent directly to see that from light source light improves the uniformity coefficient of light as Application No. 20020005991 for the wedge type light guide plate shown in Figure 1A.
Yet, in any case the resulting flat light source of this dual mode still has inborn shortcoming.At first, shown in the wedge type plate 10 of Figure 1A, the brightness of light source 12 concentrates on 1/3rd light guide plate length parts near light source 12 usually, has the problem of light source left and right sides uniformity coefficient inequality.In addition, shown in Figure 1B, use the flat light guide plate 20 of two light sources 22, though can reduce the problem of light source left and right sides uniformity coefficient, it is minimum being positioned at light guide plate 20 middle brightness.
The mode that another solves the light source uniformity coefficient as shown in Figure 2, is proposed by Fujitsu, mainly provides a kind of light conducting plate structure of hollow type.Light earlier through lens 32, then by the specific refraction condition of the specific conditioned reflex of two lens 34 and two control strips 36, is directed to light via lens combination 38 panel of LCD again after both sides light source 30 emission.In addition, add that in the bottom in two saturating borders 34 two reflector plates 40 are to increase brightness.Yet the flat light source structure of this complexity not only can increase difficulty and cost in the manufacturing, also can reduce the qualification rate of making simultaneously.
Summary of the invention
In above-mentioned background of invention, many shortcomings that traditional flat light source structure is produced, the main purpose of the present invention are two wedge type light guide plate are connected to improve the brightness and the uniformity coefficient of flat light source.
Another object of the present invention is to alleviate the weight of light source module.
Another purpose of the present invention is to improve the life-span of light source module.
According to above-described purpose, the invention provides a kind of flat light source structure, comprise a kind of flat light source structure, comprising: two light sources; And two wedge type light guide plate that interconnects, have a steering surface respectively and will lay respectively at the light that two light sources of an end surfaces of two wedge type light guide plate are sent and forward same direction in subvertical mode.
According to above-mentioned conception, wherein above-mentioned steering surface is complete inclined-plane.
According to above-mentioned conception, wherein above-mentioned steering surface is a curved surface.
According to above-mentioned conception, wherein above-mentioned steering surface partly is that inclined-plane and part are curved surface.
According to above-mentioned conception, the part inclined-plane of wherein above-mentioned steering surface accounts for 1/3rd of wedge type light guide plate length.
According to above-mentioned conception, this steering surface of wherein above-mentioned wedge type light guide plate has the V-type tangent plane.
According to above-mentioned conception, this steering surface of wherein above-mentioned wedge type light guide plate has the site.
According to above-mentioned conception, wherein above-mentioned flat light source is applied to backlight.
According to above-mentioned conception, comprise that also a reflector plate is positioned at the opposite side of this wedge type light guide plate after with this turn light rays.
According to above-mentioned conception, comprise that also a diffusion sheet is positioned at this wedge type light guide plate the same side after with this turn light rays.
According to above-mentioned conception, comprise that also a rhombus lens is positioned at this wedge type light guide plate the same side after with this turn light rays.
According to above-mentioned conception, wherein above-mentioned flat light source is applied to front light-source.
According to above-mentioned conception, wherein above-mentioned light source is selected in the group that cold cathode fluorescent tube and light emitting diode are formed.
Description of drawings
Figure 1A is a kind of traditional flat light source structural representation with wedge type light guide plate;
Figure 1B is a kind of traditional flat light source structural representation with flat light guide plate;
Fig. 2 is the flat light source structural representation with hollow type light guide plate of Fujitsu;
Fig. 3 is the shown a kind of flat light source structural representation that interconnects type wedge type light guide plate of the present invention;
Fig. 4 interconnects the flat light source structural representation of type wedge type light guide plate for the shown another kind of the present invention;
Fig. 5 interconnects the flat light source structural representation of type wedge type light guide plate for shown another of the present invention.
Embodiment
Some embodiments of the present invention can be described in detail as follows.Yet except describing in detail, the present invention can also be widely implements at other embodiment, and scope of the present invention do not limited, its with after claim be as the criterion.
The present invention mainly provides a kind of flat light source structure, comprises two light sources; And the light guide plate of a bottom indent, have a steering surface and will lay respectively at the light that two light sources of two end surfaces of wedge type light guide plate are sent and forward same direction in subvertical mode.Above-mentioned steering surface is selected in the group that inverted V-shaped inclined-plane, arc-shaped curved surface and part are also partly formed for arc-shaped curved surface for the inclined-plane.The part inclined-plane of above-mentioned steering surface accounts for 1/3rd of aforesaid light guide plate length.The aforementioned steering surface of above-mentioned light guide plate can have V-type tangent plane or site, and the aforementioned relatively steering surface of above-mentioned light guide plate can have V-type tangent plane or site.Above-mentioned light source can be cold cathode fluorescent tube or light emitting diode.
Above-mentioned flat light source can be applied in backlight or front light-source.When being applied in backlight, can arrange in pairs or groups and use a reflector plate to be positioned at the relative side of aforementioned wedge type light guide plate for aforementioned turn light rays, or a rhombus lens or diffusion sheet is positioned at the side that aforementioned wedge type light guide plate is positioned at aforesaid turn light rays.
Next, the embodiment of a flat light source structure is described according to the present invention.As shown in Figure 3, two interconnective wedge type light guide plate 120, the reflecting surface under it thereby form an approximate reverse V-shaped tangent plane 122.Two light sources 110 lay respectively at the both sides of these two interconnected light guide plate 120, and wherein these two light sources 110 can be cold cathode fluorescent tube or light emitting diode.Steering surface 122 in these two interconnected light guide plate 120 can design V-type tangent plane or site, and is derived and also can design the V-type tangent plane with respect to the position of steering surface 122 at light source 110.Flat light source structure in the present embodiment can be applied in the front light-source or the backlight of LCD.When planar light-source structure as the front light-source of LCD the time, this LCD is a reflective liquid-crystal display.In one embodiment of the invention, steering surface 122 can be complete inclined-plane.
As shown in Figure 4, it is an alternative embodiment of the invention.Similar with the described embodiment of Fig. 3, be that original similar reverse V-shaped steering surface 123 is designed to curved surface, to improve the brightness uniformity in the middle of light guide plate 120.This is because the brightness of wedge type light guide plate 120 in distance light source farthest is the darkest, and steering surface 123 is for curved surface or the inclined-plane has different reflection and the refraction condition makes light guide plate 120 be compensated in the brightness of centre fully.
As shown in Figure 5, it is another preferred embodiment of the present invention.Comparing with the embodiment of Fig. 4 with Fig. 3 of front, is the combination that steering surface 124 is designed to complete inclined-plane and curved surface.This is because use the steering surface on complete inclined-plane can obtain preferable light source homogeneity in the place near light source 110, and the steering surface of the use of the place in the middle of light guide plate 120 curved surface can compensate for brightness.A kind of preferable combination is that steering surface 124 is designed to complete inclined-plane in the place near the single light guide plate length of light source 1/110th 3, and is designed to curved surface at other local steering surface 124.
The present invention utilizes the goodish advantage of truly having of interconnected light guide plate.At first, the brightness of flat light source and uniformity coefficient all can improve, and particularly the steering surface of light guide plate can be selected complete inclined-plane, curved surface, or two kinds combination.Because the brightness and the uniformity coefficient of light source can increase, relatively the life-span of light source module is improved.In addition, with respect to traditional flat board, the weight of light source module of the present invention can reduce.
The above is preferred embodiment of the present invention only, is not in order to limit the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the claim.
Claims (13)
1. flat light source structure comprises:
Two light sources; And
The light guide plate of one bottom indent has a steering surface and will lay respectively at the light that this two light sources of two end surfaces of wedge type light guide plate sent and forward same direction in subvertical mode.
2. flat light source structure as claimed in claim 1, wherein above-mentioned steering surface is the inverted V-shaped inclined-plane.
3. flat light source structure as claimed in claim 1, wherein above-mentioned steering surface are arc-shaped curved surface.
4. flat light source structure as claimed in claim 1, wherein above-mentioned steering surface partly are that inclined-plane and part are arc-shaped curved surface.
5. flat light source structure as claimed in claim 4, wherein above-mentioned steering surface part inclined-plane accounts for 1/3rd of this light guide plate length.
6. flat light source structure as claimed in claim 1, wherein this steering surface of above-mentioned light guide plate has the V-type tangent plane.
7. flat light source structure as claimed in claim 1, this steering surface of wherein above-mentioned light guide plate has the site.
8. flat light source structure as claimed in claim 1, wherein above-mentioned flat light source is applied to backlight.
9. flat light source structure as claimed in claim 8 comprises that also a reflector plate is positioned at the opposite side of this light guide plate after with this turn light rays.
10. flat light source structure as claimed in claim 8 comprises that also a diffusion sheet is positioned at this wedge type light guide plate the same side after with this turn light rays.
11. flat light source structure as claimed in claim 8 comprises that also a rhombus lens is positioned at this light guide plate the same side after with this turn light rays.
12. flat light source structure as claimed in claim 1, wherein above-mentioned flat light source is applied to front light-source.
13. flat light source structure as claimed in claim 1, wherein above-mentioned light source is selected in the group that cold cathode fluorescent tube and light emitting diode are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021540837A CN1280659C (en) | 2002-12-10 | 2002-12-10 | Planar light source structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021540837A CN1280659C (en) | 2002-12-10 | 2002-12-10 | Planar light source structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1506729A true CN1506729A (en) | 2004-06-23 |
| CN1280659C CN1280659C (en) | 2006-10-18 |
Family
ID=34235424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021540837A Expired - Fee Related CN1280659C (en) | 2002-12-10 | 2002-12-10 | Planar light source structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1280659C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299109B (en) * | 2007-04-30 | 2010-08-11 | 深圳帝光电子有限公司 | Back light module unit with cuniform butt-joint type light guide board |
| CN101893188A (en) * | 2010-07-14 | 2010-11-24 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN101539271B (en) * | 2008-03-21 | 2010-12-08 | 曹嘉灿 | Solid state light source device |
| CN101943357A (en) * | 2010-07-14 | 2011-01-12 | 深圳市华星光电技术有限公司 | Backlight module capable of dynamically adjusting brightness and method thereof |
| CN102213789A (en) * | 2011-06-16 | 2011-10-12 | 周玉龙 | Light guide module and lamp with light guide module |
| US8842067B2 (en) | 2010-07-14 | 2014-09-23 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and display apparatus |
-
2002
- 2002-12-10 CN CNB021540837A patent/CN1280659C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299109B (en) * | 2007-04-30 | 2010-08-11 | 深圳帝光电子有限公司 | Back light module unit with cuniform butt-joint type light guide board |
| CN101539271B (en) * | 2008-03-21 | 2010-12-08 | 曹嘉灿 | Solid state light source device |
| CN101893188A (en) * | 2010-07-14 | 2010-11-24 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN101943357A (en) * | 2010-07-14 | 2011-01-12 | 深圳市华星光电技术有限公司 | Backlight module capable of dynamically adjusting brightness and method thereof |
| US8842067B2 (en) | 2010-07-14 | 2014-09-23 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and display apparatus |
| CN102213789A (en) * | 2011-06-16 | 2011-10-12 | 周玉龙 | Light guide module and lamp with light guide module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280659C (en) | 2006-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100714209B1 (en) | Surface light source device and liquid crystal display device using it | |
| CN1881023A (en) | Backlight module assembly | |
| CN1877416A (en) | Back light module | |
| CN101078795A (en) | Light conducting board and backlight module | |
| CN1862335A (en) | Backlight module | |
| CN1916723A (en) | Plate of guiding light, and backlight module | |
| JPH0894844A (en) | Light transmission plate, surface light source and light non-emitting type display device using same | |
| CN101042449A (en) | Light conducting plate and back light module unit | |
| CN1820165A (en) | Illuminating device and LCD unit | |
| CN1187640C (en) | Bidirectional display type liquid crystal display apparatus | |
| CN1668874A (en) | Illumination device and liquid crystal display device | |
| CN100409077C (en) | Rod-shaped light transmission body, illuminating device, and liquid crystal display device | |
| CN1280659C (en) | Planar light source structure | |
| CN1549027A (en) | Sidelight type back light module and liquid crystal display device | |
| CN1504805A (en) | Backlight module | |
| CN2627536Y (en) | Light source module arrangement of backlight module | |
| CN211856964U (en) | Flexible uniform light source body | |
| CN210294754U (en) | Backlight source structure with inclined light inlet | |
| CN2904010Y (en) | Light guiding plate structure | |
| CN100419530C (en) | Area light source device and liquid crystal display | |
| CN1949057A (en) | Optical film sheet for backlight module and said backlight module thereof | |
| CN2594824Y (en) | Light background lighting modules | |
| CN1272656C (en) | Planar light source structure | |
| JP2005150037A (en) | Planar lighting device and display using it | |
| CN2888465Y (en) | An improved dual-face fly eye lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20151210 |
|
| EXPY | Termination of patent right or utility model |