Apex Brands, Inc.

Sengled Co., Ltd.

Mingshuai Wang

Jinxiang Shen

Bin Sun

Henglian Luo

Zhenfeng Ding

Jiangming He

Zhibin Tian

Jingru Wang

A tool storage system is provided that includes a drawer, and an optical system configured to detect presence of an object in the drawer. The optical system includes a photoelectric sensor and processing circuitry. The photoelectric sensor includes a light transmitter configured to emit pulsed light, and a photoelectric receiver configured to convert a reflection of the pulsed light off of the object to an electrical signal that indicates proximity of the object and thereby the presence of the object in the drawer. The processing circuitry is configured to output a pulse-frequency modulation (PFM) signal from which the light transmitter is driven to emit the pulsed light. The PFM signal has a frequency that is adjustable to control an average intensity of the pulsed light, the frequency calibrated for a type of the object and an effective range of the photoelectric sensor.

Photoelectric sensor controlled by pulse-frequency modulation

A color-temperature adjustable light-emitting diode (LED) lighting device and a method for adjusting the color temperature of an LED lighting device are provided. The color-temperature adjustable LED lighting device includes: a power supply module, a micro-control unit (MCU), an adjustable LED driving power supply having a positive output terminal and a negative output terminal, a cool white LED array, a warm white LED array, a first switch circuit, a second switch circuit, a first current detection circuit, and a second current detection circuit. The power supply module is connected to an input terminal of the MCU and an input terminal of the adjustable LED driving power supply.

Color-temperature adjustable LED lightning device and method for adjusting color temperature of LED lighting device

Growing community of inventors

Shanghai, China

Mingshuai Wang