Industrial Technology Research Institute

Yao-Te Huang

Ching-Ran Lee

Hung-Chun Li

Li-Ling Lee

Yung-Chuan Chen

Ming-Shan Jeng

Wen-Tien Tsai

Yeu-Torng Yau

Bing-Chwen Yang

Hwei-Shung Chong

Chung-Yue Chen

Yie-Tone Chen

Systems and methods for lighting control are disclosed. The system may include at least one lighting device providing illumination and a handheld unit coupled with the lighting device to control at least one of a controllable lighting state, a controllable lighting intensity, and a controllable lighting effect of the lighting device. The handheld unit may include an image-capturing device and a processor coupled with the image-capturing device. The processor may be configured to control the image-capturing device to capture an image of a space affected by the lighting device; analyze an luminance level of the space; receive a lighting parameter; and provide a command to the lighting device for controlling at least one of the controllable lighting state, the controllable lighting intensity, and the controllable lighting effect of the lighting device based on at least one of the image, the luminance level, and the lighting parameter.

Lighting control systems and methods

A light source driving device configured to drive a light-emitting unit is provided. The light source driving device includes a direct voltage source, a first capacitance unit, and a switching current adjustment circuit. The direct voltage source is coupled with the light-emitting unit and supplies a direct voltage. The first capacitance unit and the light-emitting unit are connected in parallel. The switching current adjustment circuit and the light-emitting unit are connected in series. The switching current adjustment circuit is configured to bear a part of a voltage stress of the direct voltage source and is configured to switch the direct voltage.

Light source driving device including a switching current adjustment circuit

A constant power control apparatus and a controlling method thereof are provided. The constant power control apparatus outputs output power to a load element. The constant power control apparatus includes a compensation and modification device, a constant power control device, and a power generation circuit. The compensation and modification device receives an expected output power voltage and a voltage feedback signal relating to the output power. The compensation and modification device transforms the expected output power voltage into a current reference value, and modifies the current reference value to generate a modified current reference value according to the voltage feedback signal. The constant power control device receives the modified current reference value and a current feedback signal relating to the output power, and generates a control signal for use in power modulation. The power generation circuit receives the control signal and outputs the output power.

Constant power control apparatus and control method thereof

A light adjustment circuit for alternating-current light emitting diodes (AC-LED's) connected to an AC power supply and a plurality of AC-LED's comprises: a light adjustment unit, being capable of modulating AC power from the AC power supply while providing the plurality of AC-LED's with the modulated AC power; and a pulse width modulation (PWM) control circuit, being capable of modulating an external voltage signal in correspondence to variation in input AC power to enable each of the AC-LED's to achieve a predetermined brightness; wherein the AC-LED's are turned off by modulating the external voltage signal to prevent the AC-LED's from being burnt out when the input AC power is too high.

Light adjustment circuit for alternating-current light emitting diodes (AC-LED's)

Growing community of inventors

Changhua County, Taiwan

Yao-Te Huang