Illumination – Edge lighted panel – Light source
Reexamination Certificate
2004-11-09
2008-08-12
Choi, Jacob (Department: 2885)
Illumination
Edge lighted panel
Light source
C362S611000, C362S634000
Reexamination Certificate
active
07410285
ABSTRACT:
A surface light source device is provided with a primary light source and light guide plate. The light guide plate has an incidence side face opposite to which the primary light source employing LEDs or the like is disposed, an emission face for emitting light, which has been incident to the incidence side face, during the propagation process, and a back face oppositely located with respect to the emission face. The back face may be provided with a plurality of prism projections running generally vertically to the incidence side face. The primary light source has an effective light emitting surface provided with length L in a thickness direction of the light guide plate, which is not smaller than thickness t of the light guide plate at the incidence side face. This causes primary light to be incident to the incidence side face as to cover from an upper edge to lower edge thereof, preventing dark parts from being generated. As a result, the emission face comes to avoid stripe-like uneven brightness from appearing thereon.
REFERENCES:
patent: 4729068 (1988-03-01), Ohe
patent: 4870484 (1989-09-01), Sonehara
patent: 5027258 (1991-06-01), Schoniger et al.
patent: 5271077 (1993-12-01), Brockman et al.
patent: 5550676 (1996-08-01), Ohe et al.
patent: 5743616 (1998-04-01), Giuliano et al.
patent: 6164789 (2000-12-01), Unger et al.
patent: 6259854 (2001-07-01), Shinji et al.
patent: 6784603 (2004-08-01), Pelka et al.
patent: 2003/0117793 (2003-06-01), Shin et al.
patent: 2004/0042233 (2004-03-01), Suzuki et al.
patent: 2004/0125586 (2004-07-01), Ho
patent: 2004/0130912 (2004-07-01), Miyashita
patent: 2005/0024844 (2005-02-01), Oh
patent: 2005/0146894 (2005-07-01), Keuper
patent: 10-293202 (1998-11-01), None
patent: 2004-200093 (2002-12-01), None
Choi Jacob
Enplas Corporation
Staas & Halsey , LLP
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