Illumination – Light source and modifier – Fluorescent type
Patent
1995-05-15
1997-10-07
Lazarus, Ira S.
Illumination
Light source and modifier
Fluorescent type
313493, 313634, 313636, H01J 1700
Patent
active
056739982
ABSTRACT:
In a lamp main body in a discharge lamp provided in a lighting apparatus of an edge-lighting type which is used as a back-lighting section of a liquid crystal display apparatus, refractive indexes are distributed such that a light emitted from an inner space traveling in the lamp main body can be guided to a specific direction. In other words, the lamp main body is divided into a plurality of portions and the portions are formed such that refractive indexes become gradually smaller from a light converging side towards a back surface side which is opposite to the light converging side. With this arrangement, a discharge lamp, which is capable of emitting a light from a surface of the lamp main body to a specific direction, can be obtained. Moreover, when the discharge lamp is used, efficiency of utilization of a light is improved, thereby making it possible to obtain a lighting apparatus with high surface brightness and low power consumption. As a result, a liquid crystal display apparatus with high brightness and low power consumption can be obtained.
REFERENCES:
patent: 4255687 (1981-03-01), Van Engelen et al.
patent: 5008789 (1991-04-01), Arai et al.
patent: 5059860 (1991-10-01), Sato et al.
"Technical Trends of Active Matrix LCDs" s. Kaneko et al. Journal of the Illuminating Engineering Institute of Japan vol. 78, No. 12, 1994, pp. 635-638.
Lazarus Ira S.
Raab Sara Sachcie
Sharp Kabushiki Kaisha
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