Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2004-02-26
2009-02-24
Schechter, Andrew (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S062000, C362S606000
Reexamination Certificate
active
07495717
ABSTRACT:
A liquid crystal display contains a light source, a light guide panel that directs light from the light source towards a display panel, and optical sheets containing a diffusion sheet that spreads the light from the light guide panel and at least one prism sheet that redirects light from the diffusion sheet in a direction substantially perpendicular to the display panel. The optical sheets contain a region adjacent to the light source that has a hardened part that substantially prevents heat from being transferred to a display region of the optical sheet corresponding to the display region of the display panel and minimizes the temperature difference across the display region. The hardened part is formed on at least opposing sides of the optical sheets, overlaps a non-display region of the display panel and is bent or contains a convex part that projects towards the display panel.
REFERENCES:
patent: 5886759 (1999-03-01), Mashino et al.
patent: 6595651 (2003-07-01), Jeong et al.
patent: 6891580 (2005-05-01), Jang et al.
patent: 2001/0006461 (2001-07-01), Okuno
Lee Woo Jae
Park Byung In
Yeom Moon Soo
You Dong Jae
Brinks Hofer Gilson & Lione
LG. Display Co. Ltd.
Schechter Andrew
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