CN2457630Y - Back light device - Google Patents
Back light device Download PDFInfo
- Publication number
- CN2457630Y CN2457630Y CN 00242775 CN00242775U CN2457630Y CN 2457630 Y CN2457630 Y CN 2457630Y CN 00242775 CN00242775 CN 00242775 CN 00242775 U CN00242775 U CN 00242775U CN 2457630 Y CN2457630 Y CN 2457630Y
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- CN
- China
- Prior art keywords
- reflection
- light
- guide plate
- light guide
- annular convex
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- Expired - Lifetime
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Abstract
The utility model relates to a backlight device which comprises a light guiding plate, a light source part, a reflection cover and a reflection plate, wherein the light guiding plate has a front face, a back face and four side faces. A reflection monomer is formed on the back face, and the light source part is arranged on one side face of the light guiding plate. The reflection cover is encircled outside the light source part to reflect light rays of the light source part into the light guiding plate, and the reflection plate is arranged on the back face of the light guiding plate. The reflection monomer comprises at least one annular convex body, the reflection monomer can be a circular ring convex body and the reflection monomer can comprise a large annular convex body and at least one small annular convex body which is coated by the large annular convex body. The device can used for incident light with multiple directions, and light beams can be effectively reflected out of the front face of the light guiding plate.
Description
The utility model relates to a kind of back lighting device, particularly a kind of back lighting device with light guide plate.
The back lighting device of general display panel, as shown in Figure 1, it is the back lighting device of display panels, includes light source portion 11, light guide plate 12, reflex housing 13 and reflecting plate 14.Wherein, light source portion 11 is in order to provide back lighting device required light source.Light guide plate 12 is provided with positive 121 and the back side 122, and one end 123 is in abutting connection with light source portion 11, and in order to accepting the light that light source portion 11 is produced, and the back side 122 is provided with a plurality of reflection monomers 124, and reflection monomer 124 is designed to the disc convex body.
Reflex housing 13 is centered around light source portion 11, reflexes on the light guide plate 12 with the light with light source portion 11 irradiations.Reflecting plate 13 is located on the back side 122 of light guide plate 12, but so that penetrates the light reflected back light guide plate 12 at the light guide plate back side 122.
As shown in Figure 1, from light source portion 11 through the end 123 light beam A of injecting light guide plate 12, normal condition is positive 121 and the total reflection and towards advancing away from the direction of light source portion 11 repeatedly of 122 at the back side.When light beam A runs into reflection monomer 124, will change reflection angle, form light beam A 1 and reflect light guide plate 12, like this, reach the purpose backlight that display panels 17 is provided.
The method for making of existing light guide plate is to adopt the screen painting mode on the reflection monomer, and this kind mode is the high reflecting material of back up in light guide plate, to form the reflection monomer.Aforesaid way needs to increase the screen painting program on making, and comparatively takes a lot of work, and increases cost.
Another kind of manufacture is directly at the reflection monomer of the one-body molded a plurality of protrusions in the back side of light guide plate, and this reflection monomer can be made into disc, trapezoidal, pyramid, semilune ... or the like.Yet the shape of above-mentioned reflection monomer such as trapezoidal shape, semilune only can cooperate the incident light of a certain direction, and can't adapt to the occasion of multidirectional incident light; Though the reflection monomer of disc can adapt to multidirectional incident light, light beam is being reflected effectively and to reflect the effect of light guide plate not ideal enough.
As shown in Figure 2, reflection monomer 124 is designed to the disc convex body, being watched by either direction all only is single convex body, so when light beam when directions X shines, it has only the usable reflection district 126 of a part and to reflect light guide plate with the light beam usable reflection, as shown in Figure 3, when light beam A shines reflection monomer 124, because of having only usable reflection district 126 can effectively change the reflection angle of light beam, so only form the front 121 that a light beam A 1 reflects light guide plate, the effect of folded light beam still remains to be improved.
Fundamental purpose of the present utility model is to provide a kind of back lighting device that is suitable for multi-direction incident light, and it can go out the refraction of optical beam front of light guide plate effectively.
For achieving the above object, the utility model is taked following technical measures:
Back lighting device of the present utility model comprises: a light guide plate, a light source portion, a reflex housing and a reflecting plate;
Light guide plate is provided with a front, a back side and four sides, and the back side is formed with a plurality of reflection monomers;
Light source portion is located at a side of light guide plate;
Reflex housing is centered around the light source portion outside, enters light guide plate with the light reflection that light source portion is sent;
Reflecting plate is located at the back side of light guide plate;
The reflection monomer of light guide plate comprises at least one annular convex.
Wherein, described reflection monomer is an annulus convex body.
Wherein, described reflection monomer comprises a big annular convex and the little annular convex that at least one is coated by big annular convex.
Wherein, described reflection monomer comprises at least two concentric annular convex bodys.
Wherein, the zone of described annular convex coating is provided with uneven surface.
Wherein, the plane domain of described annular convex coating is provided with at least one convex body.
Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present utility model:
Fig. 1: the back lighting device sectional view of available liquid crystal display panel.
Fig. 2: the end of the reflection monomer in the existing back lighting device on the light guide plate, looked and side view.
Fig. 3: the usable reflection view of the reflection monomer of existing light guide plate.
Fig. 4: the schematic perspective view of the utility model back lighting device first embodiment.
Fig. 5: the sectional view of the utility model back lighting device first embodiment.
Fig. 6: among the utility model first embodiment the reflection monomer of light guide plate on look and side view.
Fig. 7: the synoptic diagram of the reflection monomer usable reflection state of the utility model first embodiment.
Fig. 8: the end of the reflection monomer of light guide plate, looked and side view among the utility model second embodiment.
Fig. 9: the end of the reflection monomer of light guide plate, looked and side view among the utility model the 3rd embodiment.
Figure 10: the end of the reflection monomer of light guide plate, looked and side view among the utility model the 4th embodiment.
As shown in Figure 4, it is the schematic perspective view of the utility model back lighting device first embodiment, and back lighting device of the present utility model comprises: light guide plate 2, light source portion 3, a reflex housing 4 and a reflecting plate 5.
Light source portion 3 is located at 23 places, a side of light guide plate 2, and the light beam that can enter light guide plate 2 is provided.
Reflex housing 4 is centered around outside the light source portion 3, enters light guide plate 2 with the light reflection that light source portion 3 is sent.
As shown in Figure 5, inject the light beam B of light guide plate 2 from light source portion 3, normal condition be positive 21 and the back side 22 between total reflection and advancing repeatedly towards direction away from light source portion.Can change reflection angle when light beam B runs into the part convex surface of annular convex body 25, form the front 21 that light beam B1 reflects light guide plate, be the backlight of feed flow LCD panel to reach.
See also Fig. 6, the shape of annular convex body 25 is watched by either direction all to be had one in front and one in back and the convex body of curved shape, so when light beam shines according to directions X, annular convex body 25 can have the one in front and one in back usable reflection district 26 of two curved shapes, 27, effective folded light beam and reach and reflect light guide plate front 21, as shown in Figure 7, when light beam B shines annular convex body 25, because of usable reflection district 26,27 can change the beam reflection angle, so form two light beam B1, B2, and reflecting the front 21 of light guide plate, the effect of folded light beam is excellent, and is obviously good than disc-shaped.
As shown in Figure 8, its end for the reflective hood among the utility model second embodiment, looked and side view, and the reflection monomer of this light guide plate 2 comprises that an annular convex body 28 reaches the uneven surface 29 that coats for annular convex.
As shown in Figure 9, its end for the reflection monomer among the utility model the 3rd embodiment, looked and side view, and the reflection monomer of light guide plate 2 includes two concentric annular convex bodys 210,211.
As shown in figure 10, its end for the reflection monomer among the utility model the 4th embodiment, looked and side view, and the reflection monomer of light guide plate 2 includes an annular convex body 212 and a disc-shaped convex body 213 that is surrounded by annular convex body 212.
The shape of reflection monomer of the present utility model also can be designed to oval ring convex body, square annular convex, hexagonal annular convex body except above-mentioned annular convex body ... or the like difform annular convex.
Compared with prior art, the utlity model has following effect:
1. because reflection monomer convex body shape ringwise, before the incident light of all directions all can form one One rear two effective reflection areas are so can adapt to multidirectional incident light.
2. owing to reflect ringwise convex body shape of monomer, all can form two light according to either direction incident Bundle reflects the front of LGP, so have excellent folded light beam.
The applicable multidirectional incident light of the utility model back lighting device, and can be effectively with light Bundle reflects the front of LGP.
Foregoing is to utilize embodiment that technical characterictic of the present utility model is described, be not for Limit protection domain of the present utility model, even the people is arranged on the basis of the utility model design Slightly change, must belong in the protection domain of the present utility model.
Claims (6)
1, a kind of back lighting device comprises: a light guide plate, a light source portion, a reflex housing and a reflecting plate;
Light guide plate is provided with a front, a back side and four sides, and the back side is formed with a plurality of reflection monomers;
Light source portion is located at a side of light guide plate;
Reflex housing is centered around the light source portion outside, enters light guide plate with the light reflection that light source portion is sent;
Reflecting plate is located at the back side of light guide plate;
It is characterized in that the reflection monomer of light guide plate comprises at least one annular convex.
2, back lighting device according to claim 1 is characterized in that, described reflection monomer is an annulus convex body.
3, back lighting device according to claim 1 is characterized in that, described reflection monomer comprises a big annular convex and the little annular convex that at least one is coated by big annular convex.
4, back lighting device according to claim 1 is characterized in that, described reflection monomer comprises at least two concentric annular convex bodys.
5, back lighting device according to claim 1 is characterized in that, the zone that described annular convex coats is provided with uneven surface.
6, back lighting device according to claim 1 is characterized in that, the plane domain that described annular convex coats is provided with at least one convex body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242775 CN2457630Y (en) | 2000-08-17 | 2000-08-17 | Back light device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242775 CN2457630Y (en) | 2000-08-17 | 2000-08-17 | Back light device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2457630Y true CN2457630Y (en) | 2001-10-31 |
Family
ID=33602827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00242775 Expired - Lifetime CN2457630Y (en) | 2000-08-17 | 2000-08-17 | Back light device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2457630Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004059375A1 (en) * | 2002-12-30 | 2004-07-15 | Quanta Display Inc. | A lightweight backlight module |
| CN1307438C (en) * | 2002-12-20 | 2007-03-28 | 鸿富锦精密工业（深圳）有限公司 | Light board and planar light-emitting device |
| CN100339751C (en) * | 2003-09-03 | 2007-09-26 | 友达光电股份有限公司 | Back-to-light module |
| CN100436197C (en) * | 2003-07-19 | 2008-11-26 | 鸿富锦精密工业（深圳）有限公司 | Light guiding device and luminous sign object |
| US7478942B2 (en) | 2003-01-23 | 2009-01-20 | Samsung Electronics Co., Ltd. | Light guide plate with light reflection pattern |
| CN100468089C (en) * | 2006-03-03 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Prism lens and back-light molding set therewith |
| CN100516939C (en) * | 2003-06-14 | 2009-07-22 | 鸿富锦精密工业（深圳）有限公司 | Method for making light guiding board core |
| CN102221156A (en) * | 2010-04-06 | 2011-10-19 | 友达光电股份有限公司 | Light source module |
| CN102087435B (en) * | 2009-12-02 | 2012-05-30 | 上海天马微电子有限公司 | Reflection device and liquid crystal display device using same |
-
2000
- 2000-08-17 CN CN 00242775 patent/CN2457630Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307438C (en) * | 2002-12-20 | 2007-03-28 | 鸿富锦精密工业（深圳）有限公司 | Light board and planar light-emitting device |
| WO2004059375A1 (en) * | 2002-12-30 | 2004-07-15 | Quanta Display Inc. | A lightweight backlight module |
| US7478942B2 (en) | 2003-01-23 | 2009-01-20 | Samsung Electronics Co., Ltd. | Light guide plate with light reflection pattern |
| CN100516939C (en) * | 2003-06-14 | 2009-07-22 | 鸿富锦精密工业（深圳）有限公司 | Method for making light guiding board core |
| CN100436197C (en) * | 2003-07-19 | 2008-11-26 | 鸿富锦精密工业（深圳）有限公司 | Light guiding device and luminous sign object |
| CN100339751C (en) * | 2003-09-03 | 2007-09-26 | 友达光电股份有限公司 | Back-to-light module |
| CN100468089C (en) * | 2006-03-03 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Prism lens and back-light molding set therewith |
| CN102087435B (en) * | 2009-12-02 | 2012-05-30 | 上海天马微电子有限公司 | Reflection device and liquid crystal display device using same |
| CN102221156A (en) * | 2010-04-06 | 2011-10-19 | 友达光电股份有限公司 | Light source module |
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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: 20100817 Granted publication date: 20011031 |