Pixart Imaging Incorporated

Yen-Chang Chu

Chih-Ming Sun

Cheng-Nan Tsai

Ching-Kun Chen

Chih-ming Sun

Guo-Zhen Wang

Yen-Po Chen

Cheng-nan Tsai

Chi-Chih Shen

Guo-zhen Wang

Kuo-Hsiung Li

Po-Wei Yu

Hao-Che Liu

There is provided a temperature measurement system including an image sensor, a thermal sensor and a processor. The image sensor captures an image frame. The thermal sensor captures a thermal image. The processor calibrates measured temperatures of the thermal sensor and calibrates offset pixels between the image frame and the thermal image corresponding to different operating distances.

Calibration of temperature measurement system with thermal sensor and image sensor

There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.

Smoke detector having light source surrounded by wall with varied heights

There is provided an optical machine of a smoke detector including a substrate, a light source, a light sensor and a light blocking member. The light source and the light sensor are arranged on the substrate in a first direction. The light blocking member is arranged upon the light source and blocks a part of an emission angle of the light source in the first direction far away from the light sensor.

Optical machine of smoke detector

A smoke detector includes a substrate, an optical detection module, a base and a top cover. The substrate has a ring shape region surrounding a central detection region, and a first block structure of the central detection region is protruded from the substrate and higher than an upper surface of the ring shape region. The optical detection module is disposed inside the central detection region. The base is disposed on the substrate and around the optical detection module. The base has a second block structure. The top cover is connected to the base. A lateral wall of the top cover is partly overlapped with the second block structure to form a guiding channel. The optical detection module analyzes variation of scattering parameters resulted from gaseous matter entering the top cover through the guiding channel for determining concentration of the gaseous matter.

Smoke detector

There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.

Smoke detector capable of distinguishing smoke and particles

A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.

Smoke detection device with preferred detection accuracy

Smoke detector with increased scattered light intensity

There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

Smoke detector with protrusions

There is provided a force sensor including a substrate and a polymer material layer. The substrate has a circuit layout that includes a first electrode and a second electrode configured to form a capacitor therebetween. The polymer material layer covers at least on a space between the first electrode and the second electrode, and is used to change capacitance of the capacitor while being pressed. The force sensor is arranged inside a stem of an earphone for detecting the user input.

Growing community of inventors

Hsin-Chu County, Taiwan

Yen-Chang Chu