Samsung Electronics Co., Ltd.

Sung-Taek Kim

Sung-Jin Yoon

Young-Il Oh

Dong-Ho Koo

An electronic device is provided. The electronic device is configured to check whether an event is generated during a first period in a state in which a screen is displayed, change a chroma of the screen when the event is not generated during the first period, check whether the event is generated during a second period, and adjust a lighting brightness of the screen when the event is not generated during the second period.

Method and apparatus for controlling screen

There is disclosed a resetting circuit of a key telephone system (KTS) capable of preventing data error caused by unstable power supply and instantaneous power-off of a key system unit (KSU), by adjusting a DC voltage of the key telehpone system, said DC voltage is applied to a reset terminal of a microprocessor in the key telephone system. The invention includes a power supply for supplying power to the KSU and KTS, a microprocessor for controlling the overall operation of the KTS, a first detecting means for detecting the voltage change of a first voltage Vcc1, and a second detecting means for detecting the voltage change of a second voltage Vcc2.

Growing community of inventors

Gyeonggi-do, South Korea

Sung-Taek Kim