CN201218848Y

CN201218848Y - Light conducting plate

Info

Publication number: CN201218848Y
Application number: CNU2008200368545U
Authority: CN
Inventors: 陈蔚轩; 李俊贤; 高佩龄
Original assignee: Radiant Opto Electronics Suzhou Co Ltd
Current assignee: Radiant Opto Electronics Suzhou Co Ltd
Priority date: 2008-05-21
Filing date: 2008-05-21
Publication date: 2009-04-08
Anticipated expiration: 2018-05-21

Abstract

The utility model relates to a light conducting board comprising a light incoming plane, a reflector plane and a light outcoming plane. A plurality of V-shaped light conductors are formed on the reflector plane and the light outcoming plane, V-shaped light conductors of the reflector plane have extending direction thereof in parallel with the lamp source, while light conductors of the light outcoming plane have extending direction in perpendicular to the lamp source. The reflector plane is equipped with a plurality of assistant light conducting construction in the region on both sides of the light conducting board, having extending direction in perpendicular to the lamp source. The assistant light conducting construction has a long oblique edge and a short oblique edge, a relative large oblique edge area can be constructed by assistance of the long oblique edge, so that a large part of the light is guided to positive direction, and uniformity of the outcoming light is enhanced.

Description

A kind of light guide plate

Technical field

The utility model relates to a kind of light guide plate, but especially a kind of structure that has correcting light light field and improve the correcting bright dipping light field of outgoing light homogeneity.

Background technology

As shown in Figure 1, the light guide plate 1 of prior art has incidence surface (11), reflecting surface (12) and exiting surface (13) at least.Incidence surface 11 is in order to receive the light that coupling lamp source (A) is launched, light is injected light guide plate (1) afterwards from incidence surface (11), promptly transmit towards the inside of light guide plate (1), the light that is mapped to reflecting surface (12) can be advanced towards the direction of exiting surface (13) through the reflection of reflecting surface (12).In order to strengthen the spotlight effect of light, the exiting surface (13) of this light guide plate (1) and the surface of reflecting surface (12) are provided with a plurality of V-type optical conductors (131,121), wherein, the bearing of trend of the V-type optical conductor (131) on the exiting surface (13) is vertical mutually with the direction of lamp source (A), the bearing of trend of the lip-deep V-type optical conductor of reflecting surface (12) (121) then parallels with the direction of lamp source (A), so, when the wall that light passes through V-type optical conductor (131,121) again leaves light guide plate (1), has multidirectional spotlight effect.

The said structure of light guide plate (1), make light guide plate (1) all have spotlight effect at different directions, but, as shown in Figures 2 and 3, because lamp source (A) is when luminous, light can form the angle of divergence at the two ends of lamp source A, cause light when entering light guide plate 1, the optical field distribution of the both sides of this light guide plate 1 can be offset towards both sides, at this moment, V-type optical conductor (121) can't reach optimization to the effect of the light of the light field of this skew, subsequently also can't and exiting surface (13) in V-type optical conductor (131) good fit, and influence the bright dipping performance of light guide plate (1).

Because the above-mentioned shortcoming that light guide plate has in the prior art, therefore, how to overcome the lamp source disappearance that emission angle causes when luminous, be the problem of solution that present light guide plate manufacturer needs badly.

Summary of the invention

Technical problem to be solved in the utility model be overcome in the prior art light guide plate since the lamp source when luminous, light can form emission angle at the two ends in lamp source, and then cause light when entering light guide plate, the optical field distribution of the both sides of this light guide plate can influence the deficiency of the action effect of follow-up light towards the both sides skew, a kind of light guide plate is provided, and this light guide plate has the structure of correcting bright dipping light field.

For solving above technical matters, the utility model is taked following technical scheme:

A kind of light guide plate, it has incidence surface, reflecting surface and exiting surface, be formed with a plurality of V-type optical conductors on this reflecting surface and the exiting surface, the bearing of trend of the V-type optical conductor of this reflecting surface parallels with the lamp source, and the bearing of trend of the V-type optical conductor of exiting surface and lamp source are perpendicular, wherein, the two side areas that this reflecting surface is positioned at light guide plate is provided with a plurality of auxiliary light guide structures, the bearing of trend of auxiliary light guide structure is also perpendicular with the lamp source, auxiliary light guide structure has long hypotenuse and short hypotenuse, the upper end of the long hypotenuse of the described auxiliary light guide structure of each of both sides is towards the edge tilt setting of the light guide plate of its place side, but by the bigger hypotenuse area of long hypotenuse construction, thereby, improve the outgoing light homogeneity of light guide plate with most light guiding direction.

Above-mentioned a plurality of auxiliary light guide structure from two side direction middle parts by intensive to sparse distribution setting, thereby make light guide plate reach best to the effect of light.

Description of drawings

Fig. 1 is the stereographic map of light guide plate in the prior art;

Fig. 2 is the figure that advances of light guide plate light in the prior art;

Fig. 3 is the bright dipping synoptic diagram of light guide plate in the prior art;

Fig. 4 is the stereographic map of light guide plate of the present utility model;

Fig. 5 is the light of the light guide plate of the present utility model synoptic diagram of advancing;

Fig. 6 is the light field bright dipping synoptic diagram of light guide plate of the present utility model;

Wherein:

1, light guide plate; 11, incidence surface; 12, reflecting surface; 121, V-type optical conductor; 13, exiting surface; 131, V-type optical conductor;

2, light guide plate; 21, incidence surface; 22, reflecting surface; 221, V-type optical conductor; 222, fill-in light guide structure; 222a, long hypotenuse; 222b, short hypotenuse; 23, exiting surface; 231, V-type optical conductor; A, lamp source.

Embodiment

As shown in Figure 4, light guide plate 2 of the present utility model comprises incidence surface 21, reflecting surface 22 and exiting surface 23.

The light that incidence surface 21 is launched in order to the lamp source A that receives coupling, this light promptly transmit towards the inside of light guide plate 2 after incidence surface 21 is injected light guide plate 2.

Reflecting surface 22 is adjacent with incidence surface 21, and is positioned at a side of light guide plate 2, is provided with a plurality of V-type optical conductors 221 thereon, and the bearing of trend of this V-type optical conductor 221 parallels with lamp source A.Wherein, reflecting surface 22 is positioned at the two side areas of light guide plate 2, also promptly be provided with auxiliary light guide structure 222 with respect to the two ends of lamp source A, should assist the bearing of trend and the lamp source A of light guide structure 222 perpendicular, and each auxiliary light guide structure 222 is longer near the hypotenuse 222a length of the both sides of the edge of light guide plate 2, and the length of another hypotenuse 222b is then shorter relatively.Utilize the long hypotenuse 222a of each auxiliary light guide structure 222, it is long-pending to construct bigger inclined-plane, helps the reflex to light.In addition, when this auxiliary light conductor 222 is implemented, by the both sides of light guide plate 2 towards central authorities by intensive to sparse distribution setting.

Exiting surface 23 is positioned at the top of light guide plate 2, and is also adjacent with incidence surface 21.Exiting surface 23 is provided with a plurality of V-type optical conductors 231, and the bearing of trend of this V-type optical conductor 231 parallels with lamp source A.

With reference to Fig. 5, lamp source A is entered the inside of light guide plate 2 by incidence surface 21, penetrate and the light of reflecting surface 22 can be advanced the light reflection by this face towards the direction of exiting surface 23, because the bearing of trend and the lamp source A of the V-type optical conductor 231 on the exiting surface 23 are perpendicular, the bearing of trend of the V-type optical conductor 221 on the reflecting surface 22 parallels with lamp source A, like this, light can produce the effect of optically focused at different directions when light guide plate 2 is left in the effect of V-type optical conductor 231,221.In addition, be provided with auxiliary light guide structure 222 owing to be positioned at the two side areas of light guide plate 2 in the reflecting surface 22, and should assist the bearing of trend and the lamp source A of light guide structure 222 perpendicular, because each auxiliary light guide structure 222 has a long hypotenuse 222a and a short hypotenuse 222b, and should auxiliary light guide structure 222 be to sparse distribution by tight by both sides to the central authorities of light guide plate 2, therefore, when light is penetrated and reflecting surface 22 and through reflecting surface 22 reflection the time, the long hypotenuse 222a of light guide structure 222 is penetrated and assisted to light, this light can be folded to normal L and make light guiding forward advance, the angle of divergence that the both sides light of light guide plate 2 can be produced can be assisted 222 correctings of light guide structure fully whereby, and follow-up can the cooperation preferably with the V-type optical conductor 231 in the exiting surface 23, reach the purpose of the outgoing light homogeneity that improves light guide plate 2, as shown in Figure 6.

Advantage of the present utility model is: the two side areas that is positioned at light guide plate 2 by reflecting surface 22 is provided with auxiliary light guide structure 222, trend that should auxiliary light guide structure 222 is vertical with the lamp source and have a long hypotenuse 222a, long hypotenuse 222a can be with the light guiding forward of the lamp source A angle of divergence, and help the effect of the V-type optical conductor 231 in the follow-up exiting surface 23, and then improve the uniformity coefficient of the light guide of light guide plate 2.In addition, because when entering the middle section of light guide plate 2, the shift phenomenon of light field can mitigation, therefore, becomes intensive to sparse distribution setting by this auxiliary light guide structure 222 by light guide plate 2 both sides to central authorities, so can with the corresponding cooperation of bright dipping light field of light guide plate 2.

In sum, light conducting plate structure of the present utility model, but the bright dipping light field of correcting light guide plate really effectively promote the uniformity coefficient and the brightness of light guide plate bright dipping, have novelty and progressive.

Claims

1, a kind of light guide plate, this light guide plate has incidence surface, reflecting surface and exiting surface, be formed with the light guide structure that a plurality of bearing of trends parallel with the lamp source on the described reflecting surface, it is characterized in that: the two side areas that described reflecting surface is positioned at described light guide plate is provided with auxiliary light guide structure, and the bearing of trend of described auxiliary light guide structure and lamp source are perpendicular.

2, a kind of light guide plate according to claim 1 is characterized in that: described auxiliary light guide structure has the short short hypotenuse of the relative described long hypotenuse with a length of a long hypotenuse.

3, a kind of light guide plate according to claim 2 is characterized in that: the upper end of the long hypotenuse of the described auxiliary light guide structure of each of both sides is towards the edge tilt setting of the light guide plate of its place side.

4, a kind of light guide plate according to claim 1 is characterized in that: a plurality of described auxiliary light guide structures are distributed to dredging by close from two side direction central authorities.