Light emitting diode for photosensor and photosensor using...

Details Light emitting diode for photosensor and photosensor using... Light emitting diode for photosensor and photosensor using...

G - Physics

01

N

G01N 21/84 (2006.01) A61B 5/024 (2006.01) H01L 31/173 (2006.01) H01L 33/00 (2006.01)

Patent

CA 2049210

ABSTRACT OF THE DISCLOSURE An improved light emitting diode for a photosensor which enables correction of a change in the amount of light from a light emitting element (LED2) in accordance with a change in ambient temperature is disclosed. The light emitting diode for a photosensor includes a substrate (12) and a light emitting element (LED2) provided on the substrate (12). A light receiving element (PD) which receives the light emitted from the light emitting element (LED2) thereby to detect a change in the amount of the light from the light emitting element (LED2) in accordance with a change in ambient temperature is disposed on the substrate (12) and near the light emitting element (LED2). A first transparent layer (21) is provided on the substrate (12) to cover the light emitting element (LED2) and the light receiving element (PD). A second transparent layer (22) is provided on the first transparent layer (21). A very thin air layer is interposed between the first and second transparent layer (21, 22). - 22 -

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