Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Patent
1999-10-27
2000-11-28
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
349 64, G02F 11335
Patent
active
061542628
ABSTRACT:
A reflection sheet and a frame are arranged below a light guide plate having a light collecting effect. A tubular light source is arranged near the end surface (edge) of light guide plate. A reflector is arranged to surround tubular light source. A sheet having the light collecting effect and a sheet having a light diffusing effect are provided above light guide plate. Further, a liquid crystal panel is arranged thereabove. A sheet with protrusions is provided between a lens like grooved surface having the light collecting effect of light guide plate and reflection sheet. Thus, damage is not caused to lens like grooved surface, and lens like grooved surface is prevented from catching reflection sheet. Thus, a liquid crystal display or a back light which prevents a luminous dot phenomenon is provided.
REFERENCES:
patent: 5584556 (1996-12-01), Yokoyama et al.
patent: 5596429 (1997-01-01), Kokawa et al.
patent: 5719649 (1998-02-01), Shono et al.
patent: 5886759 (1999-12-01), Mashino et al.
patent: 5990989 (1999-11-01), Ozawa
patent: 6002829 (1999-12-01), Winston et al.
Parker Kenneth
Qi Mike
Sharp Kabushiki Kaisha
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