Everlight Electronics Co., Ltd.

Hsi-Chuan Hsu

Chien-Chang Pei

Yi-Hung Chen

Chia-Hao Liang

Ying-Chu Lin

Chao-Sheng Dong

Sheng-Jia Sheu

Yen Wen Chen

Shih Chen Shi

Yu-Ju Liu

Jen-Ta Chiang

Shin-Chang Tsai

Chai-Hao Liang

A method of operating a color-temperature-tunable device is described. The method drives a first light emitting diode (LED) chip with a first driving current from a first power source. The first LED chip is configured to emit a first light having a first peak wavelength. The method also drives a second LED chip with a second driving current from a second power source. The second LED chip is configured to emit a second light having a second peak wavelength. The method further maintains a total driving current, which includes the first driving current and the second driving current, approximately constant. The second peak wavelength is different from the first peak wavelength.

Color-temperature-tunable device

A color-temperature-tunable device comprises a first light emitting diode (LED) chip group comprising at least one first blue LED chip that emits a first light having a first peak wavelength, a second LED chip group comprising at least one second blue LED chip that emits a second light having a second peak wavelength different from the first peak wavelength, and a wavelength converting layer above at least a portion of the first LED chip group and a portion of the second LED chip group. The first LED chip group and the second LED chip group are driven by a first driving current and a second driving current, respectively.

A trolley is provided, including an illumination module disposed in a frame having a plurality of plates, wherein the illumination module includes a plurality of light emitting diodes disposed on the second surface of each plate, and each light emitting diode comprises a red light chip providing 75% to 85% of it's total light energy, a green light chip providing 5% to 15% of it's total light energy and a blue light chip providing 5% to 15% of it's total light energy.

Growing community of inventors

Taipei, Taiwan

Hsi-Chuan Hsu