The design and implementation of a low-cost 360-degree color LED display system

This paper is to introduce the system design and implementation of a low-cost 360-degree true-color light emitting diode (LED) display system. This energy-saving LED display system employs both rotating scan scheme and a precision control in combination of time and space to provide three same screen displays of resolution 320×240 with only three columns of tricolor (Red, Green, Blue) LEDs. The frequency of scan and the speed of rotation are high enough to be indistinguishable by human eyes, hence the display appears to be constantly illuminated and the brilliant color image can be seen from any viewing angle. In order to realize colorful images in real time, both LED gradation driving method and display data processing are implemented in CPLD (Complex Programmable Logic Array). The experimental results show that the LED display system has an efficient and satisfying display quality, compared to the traditional LED dot matrix display and commercial surround color LED display.