Reflective type light-emitting diode
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United States of America Patent
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Nov 4, 2003
Grant Date -
Oct 17, 2002
app pub date -
Apr 9, 2002
filing date -
Apr 11, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
In a light source of a reflective type LED, a light-emitting element is mounted on the bottom surface of a concave reflecting mirror. Accordingly, light emitted horizontally from the light-emitting surface of the light-emitting element is also reflected by the reflecting mirror, so that all components of light emitting from the light-emitting element are concentrated on a region within a predetermined extent from an axis perpendicular to the light-emitting surface so as to irradiate the region. Thus, the end portion of the reflecting mirror provided in opposition to the light source need not be made close to the height of the light-emitting surface of the light-emitting element 2 in the light source. Hence, it is possible to obtain high external radiating efficiency even in the case where the reflecting mirror is provided far from the light-emitting element. Thus, the degree of freedom for designing the reflecting mirror increases, so that the reflective type light-emitting diode can be widely applied.
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