Abstract: Disclosed is an intelligent display board capable of increasing visibility by responding to external environmental factors in real time. The intelligent display board aims to improve a displayed image by minimizing differences in the characteristics of a display element (LED) according to the influence of external sunlight and artificial lighting and temperature. The white color of the display board is moved to be closed to a reference if deviating the reference so that low-level colors that are ignored by sunlight, etc. are darkened and the variance of recognizable colors is increased to make it easy to distinguish, thereby increasing the visibility of the display board. In addition, luminance varying according to temperature is adjusted to compensate for and adjust an image while automatically being applicable to a surrounding environment even with respect to temperature, thereby increasing the quality of an image displayed on the display board.

Abstract: An electronic device includes a power supply line connected between a DC power supply and an integrated circuit, and a first electronic element and a second electronic element serially connected between the power supply line and ground. The second electronic element is open when the first electronic element is short-circuited due to an overvoltage induced in the power supply line. When the overvoltage exceeds a breakdown voltage of the first electronic element, the first electronic element supplies an overcurrent induced in the power supply line to the second electronic element.

Abstract: An electronic device includes a power supply line connected between a DC power supply and an integrated circuit, and a first electronic element and a second electronic element serially connected between the power supply line and ground. The second electronic element is open when the first electronic element is short-circuited due to an overvoltage induced in the power supply line. When the overvoltage exceeds a breakdown voltage of the first electronic element, the first electronic element supplies an overcurrent induced in the power supply line to the second electronic element.