CN2699330Y - Light guiding board with uniform backlight - Google Patents
Light guiding board with uniform backlight Download PDFInfo
- Publication number
- CN2699330Y CN2699330Y CN 200420043133 CN200420043133U CN2699330Y CN 2699330 Y CN2699330 Y CN 2699330Y CN 200420043133 CN200420043133 CN 200420043133 CN 200420043133 U CN200420043133 U CN 200420043133U CN 2699330 Y CN2699330 Y CN 2699330Y
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- Prior art keywords
- light
- guide plate
- light guide
- spherical crown
- backlight
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Abstract
The utility model discloses a light guiding board with uniform backlight. The purpose is to solve the defects that the light ray emitted by the existing light leading board is not uniform, and the utilization rate of the light ray is low. A light source (1) in the backlight device is arranged on a first side surface (21) of the light leading board (2). The rear side (25) of the light leading board is provided with a plurality of ball coronal light dispersing units (3) which are protruded to the interior of the light leading board. The ball coronal light dispersing units are distributed in quincunx. A second side surface (22) and a fourth side surface (24) in the light leading board are not contacted with the light source and provided with a plurality of light reflecting tooth positions (4) which are protruded to the interior of the light leading board. The depth of every light reflecting tooth position (4) increases along with the increasing of distance from the light source (1) to the light reflecting tooth position. After the utility model is adopted, the light ray emitted by the light leading board is uniform without dark zones. The utilization rate of the light ray can be raised, and the manufacturing cost can be decreased.
Description
Technical field
The utility model relates to the backlight that a kind of use is used in industry liquid crystal displays such as sound equipment, instrument, relate in particular to the guiding device of the backlight that uses in the automobile audio.
Background technology
The structure of the backlight of existing use in automobile audio generally comprises: light source and the light guide plate that places the light source side, comparatively even in order to make from the light of light guide plate outgoing, general be provided with at the back side of light guide plate a plurality of to the projecting inward spherical crown shape astigmatism unit of light guide plate to strengthen reflecting effect, as the patent No. is that the Chinese utility model patent of ZL.98247976 discloses a kind of light conducting plate structure: each spherical crown shape astigmatism unit is in the rectangular array distribution in the back side of light guide plate, as shown in Figure 1, though the light guide plate of this structure also has certain effect to the scattering from the light of light source, but because rectangular array is too regular, the scattering of light or diffusion effect are in fact not very good; Because the height unanimity of each spherical crown shape astigmatism unit, like this, in fact light guide plate does not receive or receives only light seldom in the spherical crown shape astigmatism unit away from light source one end, thereby, the reflecting effect of the spherical crown shape astigmatism unit of this part is also poor, even can form blanking bar, these defectives make the homogeneity of light of light guide plate outgoing all be subjected to influence.
Summary of the invention
Technical problem to be solved in the utility model is intended to provide a kind of evenly light guide plate backlight that has, can be so that the light of the backlight arrangement outgoing of using in the automobile audio is more even.
According to the utility model, a kind of have an evenly light guide plate backlight, light source in the back lighting device places first side of described light guide plate, the back side of described light guide plate is provided with a plurality of to the projecting inward spherical crown shape astigmatism unit of light guide plate, described each spherical crown shape astigmatism unit is the plum blossom shape and distributes, and is provided with a plurality of to the projecting inward reflective tooth position of light guide plate with not contacted second side of light source and the 4th side in the described light guide plate.
After adopting the utility model, because each spherical crown shape astigmatism unit of the prior art is changed over the plum blossom shape by the rectangular array distribution to distribute, make each spherical crown shape astigmatism unit when reflection ray except can receiving the light that four adjacent spherical crown shapes astigmatism unit reflect back as usual, can also receive the light that other four the spherical crown shapes astigmatism unit between above-mentioned spherical crown shape astigmatism unit reflects back, like this, it will be more abundant reflecting in light guide plate from the light of light source, and the light that makes backlight arrangement penetrate is more even; Simultaneously, the reflective tooth position of the second and the 4th side will be penetrated in the light reflected back light guide plate on this two sides, improve the utilization factor of light, reduce the luminous energy loss, simplify production process, reduce cost of products.
The purpose of this utility model, feature and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the distribution schematic diagram of the spherical crown shape astigmatism unit at the existing light guide plate back side;
Fig. 2 is the distribution schematic diagram of each spherical crown shape astigmatism unit at the light guide plate described in the utility model back side;
Fig. 3 is the synoptic diagram that each spherical crown shape astigmatism cell height described in the utility model changes;
Fig. 4 is the structural representation of the light guide plate described in a kind of embodiment of the present utility model.
Concrete embodiment
With reference to Fig. 2, a kind of have an evenly light guide plate backlight, and the light source 1 in the back lighting device places first side 21 and the 3rd side 23 of described light guide plate 2, in fact, if the length of liquid crystal display device LCD is shorter, also can only light source 1 be set in first side 21 of light guide plate 2; The back side 25 of described light guide plate (being the face of showing among Fig. 2) is provided with a plurality of to the projecting inward spherical crown shape astigmatism unit of light guide plate, and described each spherical crown shape astigmatism unit is the plum blossom shape and distributes.Each spherical crown shape astigmatism unit with respect to the distribution of Fig. 1 rectangular array, four adjacent spherical crown shape astigmatism unit of each spherical crown shape astigmatism unit periphery still are rectangular array distribution in the utility model, in fact be equivalent to increase a spherical crown shape astigmatism unit in the center of rectangle, like this, it will be more abundant reflecting in light guide plate from the light of light source, make that the light of backlight arrangement outgoing is more even.
In the prior art, generally each spherical crown shape astigmatism unit only is arranged on the back side of light guide plate, and the light that projects the side of light guide plate uses seldom, thereby reduced the utilization ratio of light.For this reason, during reality is used, generally all is to paste tin pool paper in the side of light guide plate as reflectance coating, will penetrate in the light reflected back light guide plate of side, thus the utilization factor of raising light.The shortcoming that the method exists is: in the production run, operating difficulties requires high to workman's skill level.The utility model has been done again the side of light guide plate and has been improved design for this reason: as shown in Figure 4, in light guide plate with not contacted second side 22 of light source and the 4th side 24 on be provided with a plurality of to the projecting inward reflective tooth position 4 of light guide plate, purpose is exactly that the light that will project the side of light guide plate reflects back in the light guide plate, reduce the luminous energy loss, improve the utilization factor of light, increase backlight illumination of the present utility model, simplify the operation in the actual production, reduce cost of products.
For the light guide plate reflection of the consistent light source far-end that brings of height that overcomes each spherical crown shape astigmatism unit insufficient, easily form defectives such as blanking bar, the utility model improves simultaneously to the height of each spherical crown shape astigmatism unit, the height that makes each spherical crown shape astigmatism unit is along with its rising gradually with the increase of light source distance, the top of each spherical crown shape astigmatism unit is near with respect to the distance of light source, far be a cambered surface that raises gradually, as shown in Figure 3, the spherical crown shape astigmatism unit that is positioned at the light source far-end so still can receive the light of directly coming from light emitted and also this part light directly be reflected away, avoided the blanking bar phenomenon of successively decreasing and producing because of luminous energy, make the utlity model has more uniform backlight.
As a same reason,, also the degree of depth of described each reflective tooth position 4 can be increased along with the increase of distance light source distance, (the astigmatic unit 3 of spherical crown shape is not shown) among the figure as shown in Figure 4 again in order to make that the light reflection of side of light guide plate also can uniformity.
In light guide plate shown in Figure 4, link to each other by a chamfering inclined-plane 26 between first side 21 of described light guide plate and second side 22, such improvement is equivalent to increase a reflecting surface on the light guide plate in original four directions, purpose be make originally can't reflection ray first side 21 and the contact position of second side 22 can pass through these chamfering inclined-plane 26 reflection rays, improve the utilization factor of light, as a same reason, increase another chamfering inclined-plane 27 between first side 21 of described light guide plate and the 4th side 24, make between the two to link to each other by this chamfering inclined-plane 27.Among the embodiment shown in Figure 5, under the long situation of light guide plate, three side 23 other also the be provided with light sources 1 relative with first side 21, in like manner, can between the 3rd side 23 and second side 22, increase chamfering reflecting surface 28, increase chamfering reflecting surface 29 between the 3rd side 23 and the 4th side 24, purpose all is to improve the utilization factor of light.
Claims (5)
1. one kind has evenly light guide plate backlight, light source in the back lighting device (1) places first side (21) of described light guide plate (2), the back side of described light guide plate (25) is provided with a plurality of to the projecting inward spherical crown shape astigmatism unit (3) of light guide plate, it is characterized in that: described each spherical crown shape astigmatism unit is the plum blossom shape and distributes, and is provided with a plurality of to the projecting inward reflective tooth position (4) of light guide plate with not contacted second side of light source (22) and the 4th side (24) in the described light guide plate.
2. as claimed in claim 1 have an evenly light guide plate backlight, and it is characterized in that: the degree of depth of described each reflective tooth position (4) increases along with the increase of distance light source (1) distance.
3. as claimed in claim 1 or 2 have an evenly light guide plate backlight, and it is characterized in that: the height of described each spherical crown shape astigmatism unit (3) is along with its rising gradually with the increase of light source distance.
4. as claimed in claim 3 have an evenly light guide plate backlight, it is characterized in that: link to each other by a chamfering inclined-plane (26) between first side (21) of described light guide plate and second side (22).
5. as claimed in claim 4 have an evenly light guide plate backlight, it is characterized in that: link to each other by another chamfering inclined-plane (27) between first side (21) of described light guide plate and the 4th side (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420043133 CN2699330Y (en) | 2004-02-27 | 2004-02-27 | Light guiding board with uniform backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420043133 CN2699330Y (en) | 2004-02-27 | 2004-02-27 | Light guiding board with uniform backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2699330Y true CN2699330Y (en) | 2005-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420043133 Expired - Fee Related CN2699330Y (en) | 2004-02-27 | 2004-02-27 | Light guiding board with uniform backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2699330Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100560A1 (en) * | 2008-01-31 | 2009-08-20 | Dingguo Pan | A disc-shaped light reflecting plate with variable section unequilateral right triangles prisms and a lamp made therefrom |
| CN105278164A (en) * | 2015-11-16 | 2016-01-27 | 北京工业大学 | Bluelight LD multi-tooth reflective transmitting backlight module structure |
-
2004
- 2004-02-27 CN CN 200420043133 patent/CN2699330Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100560A1 (en) * | 2008-01-31 | 2009-08-20 | Dingguo Pan | A disc-shaped light reflecting plate with variable section unequilateral right triangles prisms and a lamp made therefrom |
| CN105278164A (en) * | 2015-11-16 | 2016-01-27 | 北京工业大学 | Bluelight LD multi-tooth reflective transmitting backlight module structure |
| CN105278164B (en) * | 2015-11-16 | 2019-01-11 | 北京工业大学 | Back lighting modular structure is conducted in the multiple tooth reflection of blue light LD |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |