Surface light source device of side light type and display

Details Surface light source device of side light type and display Surface light source device of side light type and display

1997-10-07

1999-09-28

Cariaso, Alan

Illumination

Revolving

362 26, 362343, 362351, F21V 1312

Patent

active

059575611

ABSTRACT:
In a surface light source device of side light type and a display employing the same, illumination light of high grade is allowed to emit by reducing irregularities in luminance caused along a muntin of a support member to support components such as a light guide plate 2 and a reflection sheet 21. A light quantity correction surface 21A is formed between the reflection member 21 and a support member 11. Otherwise, a member providing the light quantity correction surface is arranged on the rear of the support member. A quantity of illumination light in a portion of a muntin 11B of the support member 11 is made approximately equal to that in a portion of an aperture 11C, and the irregularities in luminance caused correspondingly to the muntin are reduced. The light quantity correction surface may be provided by a surface of the muntin itself or ink coated on the muntin by means of printing. Further, a member providing the light quantity correction surface may be arranged between the muntin and the reflection member 21. This member may be an additional reflection sheet.

REFERENCES:
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patent: 5216411 (1993-06-01), Ashitomi et al.
patent: 5504605 (1996-04-01), Sakuma et al.
patent: 5654779 (1997-08-01), Nakayama et al.
patent: 5677746 (1997-10-01), Yano

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