Light emitting element, lighting device and surface emission illuminating device using it
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United States of America Patent
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Issued Date -
Aug 10, 2006
app pub date -
May 28, 2003
filing date -
May 28, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a non-sealed type light emitting device in which a diode structure on a face of a transparent substrate by lamination of an n-type semiconductor layer and a p-type semiconductor layer, an outer face of the transparent substrate is made not in parallel with a most outer face of the diode structure by, for example, being slanted so as to increase a light taking efficiency from an exit face of light. An incident angle of a light beam entering into an exit face of light is gradually reduces by repeating total reflection on these two faces so as to make is smaller than a critical angle, and to emit the light beams outward of the light emitting device.
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