Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With reflector – opaque mask – or optical element integral...
Reexamination Certificate
2006-01-31
2006-01-31
Pham, Hoai (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
With reflector, opaque mask, or optical element integral...
C257S099000, C362S625000, C362S619000
Reexamination Certificate
active
06992335
ABSTRACT:
A guide plate30has a back face34provided with a great number of micro-reflectors90which has a guide portion and a conversion output portion including a valley. The conversion output portion reflects twice input light P at inner slopes, generating inner output light Q directed obliquely as to be distant from an incidence end face32. Inner output light Q is inner-incident to a slope of projection row PR on an emission face33, with the result that some of the inner-incident light becomes a direct escaping light and much of the other reaches the emission face33again after travelling along various paths. At the second time or later chances of escaping, an actual escaping occurs to generate an indirect escaping light. A mixed emission suitably blended of the direct and indirect light is directed to directions, which are modified to directions around a roughly frontal direction by prism sheet PS before being supplied to a LCD panel or the like to be illuminated. Blending of direct/indirect escaping light prevents fine brightness unevenness from appearing. Reflector RF, if arranged, brings an increased indirect escaping light. An emission has travelling directions inclinations of which are controlled while fine brightness unevenness are reduced.
REFERENCES:
patent: 6485157 (2002-11-01), Ohkawa
Enplas Corporation
Nguyen DiLinh
Pham Hoai
Staas & Halsey , LLP
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