OPTICAL FILTER FOR AMBIENT LIGHT SENSOR

• Main Authors: OHASHI YUKIE, OTSUKI TOSHIHIRO, NAGAYA KATSUYA
• Format: Patent
• Language: English; Korean
• Published: 18.04.2023
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COLORIMETRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; POLISHES; RADIATION PYROMETRY; SEMICONDUCTOR DEVICES; TESTING

본 발명의 과제는, 각종 환경 광 센서가 마련되는 기기의 저배화에 수반하여, 입사 각도가 커진 경우에도 우수한 가시광 투과율과 근적외선 커트 성능을 양립 가능하고, 또한 휨이나 변형을 저감하며 대형화가 가능한 광학 필터를 제공하는 데 있다. 요건 (a)를 충족하는 기재를 가지며, 또한 특정한 광학 특성을 충족하는 것을 특징으로 하는 환경 광 센서용 광학 필터: (a) 파장 650nm 이상 800nm 미만의 영역에 흡수 극대를 갖는 화합물 (A), 및 파장 800nm 이상 1850nm 이하의 영역에 흡수 극대를 갖는 화합물 (B)를 포함하는 층을 갖는다. The purpose of the present invention to provide an optical filter which is capable of achieving both excellent visible light transmittance and near-IR cut performance even when the incidence angle is increased with the reduction in the profile of equipment provided with ambient light sensors, and which enables the reduction of warping and distortions and can be increased in size. The optical filter for an ambient light sensor is characterized by comprising a base material that satisfies the requirement (a), and by satisfying a specific optical characteristic: the requirement (a) is that the optical filter has a layer including a compound (A) having an absorption maximum in a wavelength range of 650 to less than 800 nm, and a compound (B) having an absorption maximum in a wavelength range of 800-1850 nm.