Hon Hai Precision Industry Co., Ltd.

Hong-Fu Jin Precision Industry (Shenzhen) Co., Ltd.

Tsang-Chiang Yang

Chiang-Kuo Tang

Wen-Hsiang Lu

Gwo-Yan Huang

Te-Yuan Kung

Zhao-Yu Wang

Yen-Hao Lai

Cheng-Bin Wei

Kun Liang

Jun-Jie Cui

Qi-Qiang Lei

Yi-Ning Lin

An LED illuminating device includes a base, an LED substrate mounted on the base, at least one LED on the substrate and an envelope fixed on the base. The envelope includes a plurality of transmission regions and a plurality of reflective regions. The lights beams emitted by the LED reaches the envelope. A first portion of the light beams reaching transmission regions can pass therethough. A second portion of the light beams are internally reflected in multiple times by the reflective regions until they finally escape to outside through the transmission regions. The direction of the light beams can reach various locations of each of the transmission regions at various angles.

LED illuminating device

A color temperature adjusting system includes a processing unit, a constant-current drive unit, and an light emitting unit (LED) unit including two unmatched LED modules with different basic color temperatures. A table records a relationship between coefficient values and current values for the current(s) flowing through the two LED modules. The processing unit selects one of a number of predetermined formulas to calculate the coefficient value by comparing a desired value with a threshold value, and further determines the current values according to the calculated coefficient value listed in a table. The constant-current drive unit includes two drive module generating modulating signals to adjust the respective values of the current flowing through the two LED modules to match the determined current values, thereby adjusting the color temperature value of the LED unit to the desired level. A related method is also provided.

System and method for adjusting color temperature

Growing community of inventors

Taipei, Taiwan

Tsang-Chiang Yang