Epistar Corporation

Zong-Xi Chen

Hsin-Mao Liu

Min-Hsun Hsieh

Hung-Chi Wang

Wei-Yu Chen

Chien-Fu Huang

Yi-Ming Chen

Tzu-Chieh Hsu

Shih-I Chen

Tsung-Xian Lee

Yih-Hua Renn

Ching-Pei Lin

Cheng-Nan Han

Jui-Hung Yeh

Yu-Ren Peng

Hsing-Chao Chen

Meng-Lun Tsai

Kunal Kashyap

Chien-Yan Wang

Tien-Yang Wang

Kun-Wei Kao

A sensing device includes a first III-V compound stack and a second III-V compound stack. The first III-V compound stack has a first sensing area, and the second III-V compound stack has a second sensing area. A passivation layer fully covers the second sensing area. The first III-V compound stack is physically separated from the second III-V compound stack, and has material compositions and structures same as the second III-V compound stack.

Sensing device, sensing apparatus and sensing system

A sensing apparatus includes a sensing device having a hetero-junction structure, a light coupler connected to the sensing device and a readout device connected to the light coupler.

Sensing apparatus

The present application provides a light-emitting device comprising a first light-emitting diode group; a second light-emitting diode group electrically connected to the first light-emitting diode group in parallel; and a temperature compensation element electrically connected to the second light-emitting diode group in series; and a first switch device connected between the second light-emitting diode group and the temperature compensation element.

Light-emitting device with temperature compensation

The light-emitting device disclosed herein comprises a step down circuit and a current limit device, wherein the step down circuit prevents the current signal provided to the light-emitting device larger than the rating current value of the light-emitting device. Moreover, the current limit device only limits current signal while the power supply surges. The two stages protect circuit turn less power to heat.

Light-emitting device circuit and method of operating thereof

A light emitting apparatus disclosed herein comprises a first control apparatus, a first light emitting device, a sense apparatus, a second control apparatus, a power source and a second light emitting device, wherein the second light emitting device is electrically connected to the power source which is not connected to the first light emitting device. The sense apparatus senses both temperature and current of the first light emitting device to generate a second driving signal. The second driving signal is then provided to control the second light emitting device to emit a light for compensating the CCT shift of the light emitted by the first light emitting device.

Light emitting apparatus and method of operating thereof

A light-emitting device of an embodiment of the present application comprises a substrate; a first semiconductor light-emitting structure formed on the substrate, wherein the first semiconductor light-emitting structure comprises a first semiconductor layer having a first conductivity type, a second semiconductor layer having a second conductivity type and a first active layer formed between the first semiconductor layer and the second semiconductor layer, wherein the first active layer is capable of emitting a first light having a first dominant wavelength; and a first thermal-sensitive layer formed on a path of the first light, wherein the first thermal-sensitive layer comprises a material characteristic which varies with a temperature change.

Light-emitting device

Growing community of inventors

Hsinchu, Taiwan

Zong-Xi Chen