| 摘要 |
According to the present invention, a square LED billboard outputs a circular logo image and an analog clock image. The square LED billboard includes: a light emitting unit made of LED pixel panels having multiple LEDs arranged and mounted in a matrix form; a driving unit driving the LED pixel panels; a control unit which provides output data to the driving unit; a power supply unit for supplying powder; and a housing which forms an outer case. The light emitting unit is formed by coupling the LED pixel panels to have a square light emitting surface. The control unit counts time and includes circular logo image data and analog clock image data according to the time in a memory. The circular logo image data and analog clock image data are output alternately. The output analog clock image data is the analog clock image data corresponding to the counted time. The analog clock image can be output with the circular logo image to provide the time information as well as the functions of an analog clock, a circular logo advertisement. The LED billboard outputting the circular logo advertisement also provides the time information or temperature information to attract the attention of people and enhance the advertising effects. |
