Illumination – Edge lighted panel – Light guide
Reexamination Certificate
2007-07-10
2009-10-06
Lee, Y My Quach (Department: 2885)
Illumination
Edge lighted panel
Light guide
C362S607000, C362S612000
Reexamination Certificate
active
07597470
ABSTRACT:
A plurality of display portions are illuminated in different colors using a light source of a single type and a single light guide plate. A light source (220) has a light emitting element for emitting blue light, and a red fluorescent substance which is excited by blue light to generate red light, thereby emitting violet light (L1) as a whole. The violet light (L1) enters a side surface of a light guide plate (210) and is emitted from an upper surface (211) and a lower surface (212) as violet light (L1-1) and (L1-2), respectively. A green fluorescent substance is provided in a fluorescent film (230). The light (L2) obtained after the violet light (L1-1) passes through the fluorescent film (230), becomes white light because green color component light generated from the fluorescent substance is mixed with the violet light (L1-1). On the other hand, on a lower surface side, the violet light L1-2is used as illuminating light.
REFERENCES:
patent: 6981791 (2006-01-01), Higashiyama
patent: 7345319 (2008-03-01), Okada
patent: 7380953 (2008-06-01), Onishi et al.
patent: 2006/0109682 (2006-05-01), Ko et al.
patent: 2007/0053208 (2007-03-01), Justel et al.
patent: 2008/0219025 (2008-09-01), Spitzer et al.
Adams & Wilks
Lee Y My Quach
Seiko Instruments Inc.
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