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1. 发明授权

US11525776B2 Droplet sensor 有权
公开(公告)号：US11525776B2
公开(公告)日：2022-12-13
申请号：US16503862
申请日：2019-07-05
申请人： Yuya Kawasaki , Hideo Kurosawa
发明人： Yuya Kawasaki , Hideo Kurosawa
IPC分类号： G01N21/41 , G01N27/22 , B60S1/08 , G01W1/14 , G01N21/55 , G01N21/43
摘要： A droplet sensor includes an optical cover that forms part of a spheroid, a major axis of the spheroid being a vertical axis, a light emitting/receiving device disposed at a position offset from a first focal point of the spheroid along the major axis, and a reflector disposed in vicinity of a second focal point of the spheroid. The optical cover has an effective detection area between the light emitting/receiving device and the reflector. The effective detection area satisfies a total internal reflection condition at an interface with a gas, and does not satisfy the total internal reflection condition at an interface with a liquid. The reflector reflects, towards a light receiving surface of the light emitting/receiving device, light totally reflected by the effective detection area, or reflects, towards the effective detection area, light directly incident on the reflector from the light emitting/receiving device.

2. 发明授权

US10955339B2 Droplet sensor 有权
公开(公告)号：US10955339B2
公开(公告)日：2021-03-23
申请号：US16801624
申请日：2020-02-26
申请人： Yuya Kawasaki , Hideo Kurosawa
发明人： Yuya Kawasaki , Hideo Kurosawa
IPC分类号： G01N21/552 , G01J3/42 , G01J3/02
摘要： A droplet sensor includes an optical cover having an elliptical surface forming a portion of a spheroid, a light source arranged at or in a vicinity of a first focal point of the elliptical surface, and a photodetector arranged at or in a vicinity of a second focal point of the elliptical surface. The elliptical surface includes an effective detection area configured to reflect light emitted from the light source towards the photodetector. An amount of light reflected from the effective detection area changes according to adhesion of a droplet on the effective detection area of the elliptical surface. The optical cover includes a hollow portion that is provided in a region inside the optical cover, and outside optical paths of the light emitted from the light source and reflected from the effective detection area toward the photodetector.

3. 发明授权

US10302748B2 Sensor circuit and sensor apparatus 有权
公开(公告)号：US10302748B2
公开(公告)日：2019-05-28
申请号：US15685115
申请日：2017-08-24
申请人： Yuya Kawasaki
发明人： Yuya Kawasaki
IPC分类号： G01S17/08 , G01S7/491 , G01S17/02
摘要： A sensor circuit includes an illuminance sensor to detect illuminance of ambient light; and a proximity sensor to drive a light emitter, and to detect proximity of an object, based on an intensity of light emitted by the emitter and reflected on the object. The sensor circuit further includes at least one terminal among: a drive terminal for driving the light emitter; a detection result output terminal used for outputting a detection result of one of the sensors; an input/output terminal used for inputting and outputting data compliant with a communication protocol; and a clock terminal used for inputting a clock signal compliant with the communication protocol, and a writable nonvolatile memory in which trimming data for correcting an individual variation of a characteristic of the sensor circuit is to be written. The trimming data input from at least one of the terminal is written in the memory.

4. 发明授权

US10126414B2 Proximity sensor 有权
公开(公告)号：US10126414B2
公开(公告)日：2018-11-13
申请号：US15696530
申请日：2017-09-06
申请人： Yuya Kawasaki , Naosumi Waki
发明人： Yuya Kawasaki , Naosumi Waki
IPC分类号： G01S7/48 , G01S7/486 , G01S17/08 , H01L31/02 , H01L31/173 , H03K17/955 , G01S17/02 , H03K17/94
摘要： A proximity sensor for detecting proximity of an object, by sensing reflected light coming from an object on which a light emission pulse is reflected, the proximity sensor includes: a converter circuit configured to convert a current output from a photodetector sensing the reflected light into a voltage, and to output the voltage, magnitude of the current depending on a degree of the proximity of the object; a differential converter circuit configured to convert the voltage output by the converter circuit into a differential voltage, and to output the differential voltage; and a correlated double sampling circuit having a differential configuration, and configured to subtract a value of the differential voltage output by the differential converter circuit, sampled at falling of the light emission pulse, from a value of the differential voltage sampled at rising of the light emission pulse.

5. 发明授权

US09182276B2 Semiconductor integrated circuit for optical sensor 有权
标题翻译：半导体集成电路用于光学传感器
公开(公告)号：US09182276B2
公开(公告)日：2015-11-10
申请号：US14331308
申请日：2014-07-15
申请人： Yuya Kawasaki , Markus Oberascher
发明人： Yuya Kawasaki , Markus Oberascher
IPC分类号： G01J1/42 , G01J3/36 , G01J1/44 , G01J1/04
CPC分类号： G01J1/4228 , G01J1/0492 , G01J1/32 , G01J1/44 , G01J3/36 , G01J2001/444
摘要： There is provided a semiconductor integrated circuit for an optical sensor for receiving environmental light through a cover member that attenuates visible light and transmits infrared light and a collecting lens, performing luminosity factor correction based on an amount of received light, and detecting an illuminance, wherein the semiconductor integrated circuit includes a first light receiving element having a first spectral property; a second light receiving element having a second spectral property; and a luminosity factor correction unit configured to perform the luminosity factor correction according to output of the first light receiving element and output of the second light receiving element, wherein the luminosity factor correction unit includes an AD conversion unit performed by time division on the output of the first light receiving element and the output of the second light receiving element, and a calculating unit subtracting digital signals obtained by the conversion.
摘要翻译：提供了一种用于光学传感器的半导体集成电路，用于通过衰减可见光并透射红外光的聚光透镜，基于接收光量进行亮度因子校正并检测照度来接收环境光，其中半导体集成电路包括具有第一光谱特性的第一光接收元件; 具有第二光谱特性的第二光接收元件; 以及亮度因子校正单元，被配置为根据第一光接收元件的输出和第二光接收元件的输出来执行亮度因子校正，其中亮度因子校正单元包括通过时间分割执行的AD转换单元，第一光接收元件和第二光接收元件的输出，以及计算单元，减去通过转换获得的数字信号。

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