ELECTRONIC DEVICE INCLUDING OPTICAL SENSOR USING FRESNEL LENS

• Main Authors: LEE, Yongjin, KIM, Younghyun, YUN, Inho, CHUNG, Sohyun
• Format: Patent
• Language: English; 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

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.