Epistar Corporation

Chang-Hsieh Wu

Jai-Tai Kuo

Min-Hsun Hsieh

Sheng-Bo Wang

Yao-Zhong Liu

Ya-Wen Lin

Chi-Chih Pu

Tzu-Hsiang Wang

Chen-Yu Wang

Chien-Kai Tung

Yi-Chao Lin

Chiao Fu

Chao-Kai Chang

Pei-Yu Li

Yi-Ru Shen

A voltage converter circuit, comprising: a bridge rectifier; a first transistor, having a first end, a second end and a third end; a second transistor, having a first end and a second end; wherein the first end of the first transistor and the first end of second transistor are electrically connected to bridge rectifier, and the second end of the first transistor is electrically connected to the first end of the second transistor; and a Zener diode, connected between the third end of the first transistor and the second end of the second transistor.

Voltage converter circuit for converting AC voltage to DC voltage

A light emitting apparatus includes a housing, a connector, a light source, a control module board, and an antenna. The housing includes an inner space. The light source is located in the inner space. The control module board is located in the connector, wherein an accommodation space is formed by the housing and the control module board. The antenna is located in the accommodation space.

Light emitting apparatus having antenna located in accommodation space formed by housing and control module

An electronic device includes a top carrier having a first top surface and a first bottom surface, a first electronic element formed on the first top surface, a second electronic element formed on the first bottom surface, a bottom carrier below the top carrier and having a second top surface near the top carrier, and a controller formed on the second top surface.

Electronic device

An LED driver for driving a light-emitting device (LED) includes a bridge rectifier, a current driver, and a protection circuit. The bridge rectifier includes a rectifying diode, and the bridge rectifier receives and converts an AC input power source to a DC power source having a DC current and a DC voltage. The current driver includes a constant current source. The bridge rectifier, the current driver, and the protection circuit are connected in series, and the constant current source is used to limit the magnitude of the direct current to drive the LED. The protection circuit includes a protection unit. The protection circuit connects the current driver and the LED. The LED includes a substrate and the rectifying diode, the constant current source, and the protection unit are formed together on the substrate.

LED driver and illumination system related to the same

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Hsinchu, Taiwan

Chang-Hsieh Wu