Raydium Semiconductor Corporation

Chung-Tai Cheng

Yung-Hsiang Yang

Chia-Hsiu Lin

An electromagnetic touch-control screen structure, comprising: a display panel; a touch-control plate over the display panel; an electromagnetic induction plate over the touch-control plate; and a cover lens attached on the electromagnetic induction plate. The electromagnetic touch-control screen of the disclosure, by deploying reasonable structure and manufacturing technique, stacks an electromagnetic induction plate with a touch-control plate, a cover lens and a display panel. Compared with existing manufacturing techniques, it can reduce one time of lamination operation, and dramatically decrease the thickness and weight of the electromagnetic structure, so that it can meet the need of lightness and thinness, for touch-control display equipments, like cellphone.

Holding current circuit of LED driving apparatus and operating method thereof

A LED driving apparatus having a holding current circuit and an operating method thereof are disclosed. The holding current circuit includes an input terminal, a holding resistor, a regulator, a first resistor, a second resistor, a setup resistor, a control unit, and a transistor. The holding resistor and the regulator, the first resistor and the second resistor, and the transistor and the setup resistor are coupled between the input terminal and ground terminal respectively. The control unit is coupled to the transistor, between the holding resistor and the regulator, and between the first resistor and the second resistor respectively. The control unit receives a first voltage between the holding resistor and the regulator and a second voltage between the first resistor and the second resistor and outputs a control signal to selectively control the transistor off.

Growing community of inventors

Zhubei, Taiwan

Chung-Tai Cheng