Chunghwa Picture Tubes, Ltd.

Kun-Chi Chiu

Yen-Ting Chen

Yun-Chih Chen

Ming-Chi Weng

The present invention provides a dual-mode touch sensing apparatus. The dual-mode touch sensing apparatus includes a substrate, a first touch sensing electrode formed on the substrate and a second touch sensing electrode formed on the substrate. The first touch sensing electrode is used to perform the capacitive touch sensing technology. The second touch sensing electrode is used to perform the electromagnetic touch sensing technology.

Dual-mode touch sensing apparatus

An over-temperature protection circuit is adapted to a light source driver coupled to a light-emitting device. The light source driver has a current setting terminal receiving a set current to control the magnitude of a current flowing through the light-emitting device. The over-temperature protection circuit includes a first, second, and third resistors, a thermal resistor measuring temperature of the light-emitting device, and a diode. A first terminal of the first resistor provides the set current to the current setting terminal. The second resistor is coupled between the first resistor and a ground voltage in series. A first terminal of the thermal resistor is coupled to a reference voltage. The third resistor is coupled between the thermal resistor and the ground voltage in series. An anode and a cathode of the diode are respectively coupled to a second terminal of the thermal resistor and a second terminal of the first resistor.

Growing community of inventors

Miaoli County, Taiwan

Kun-Chi Chiu