ELECTRONIC DEVICE INCLUDING OPTICAL SENSOR USING FRESNEL LENS

An electronic device is provided. The electronic device includes a housing that includes a sensing surface, a light emitting unit that outputs a light through the sensing surface, a light receiving unit that collects a reflection light reflected from an external object in contact with the sensing su...

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Bibliographic Details
Main Authors LEE, Yongjin, KIM, Younghyun, YUN, Inho, CHUNG, Sohyun
Format Patent
LanguageEnglish
French
German
Published 14.04.2021
Subjects
CALCULATING
COLORIMETRY
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PRESENTATION OF DATA
RADIATION PYROMETRY
RECOGNITION OF DATA
RECORD CARRIERS
TESTING
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Summary:An electronic device is provided. The electronic device includes a housing that includes a sensing surface, a light emitting unit that outputs a light through the sensing surface, a light receiving unit that collects a reflection light reflected from an external object in contact with the sensing surface, after the light is output from the light emitting unit, and a first Fresnel lens that is disposed between the light receiving unit and the sensing surface. A first surface of the first Fresnel lens total reflects the reflection light introduced in a direction perpendicular to the sensing surface, and a second surface of the first Fresnel lens refracts the total reflected light so as to be introduced to the light receiving unit.
Bibliography:Application Number: EP20190781768