Dot-matrix LED display device having brightness correction circuit and method for correcting brightness using the correction circuit

摘要

A dot-matrix LED display device has an LED array with a dot matrix of LEDs, a matrix driver unit for driving the LEDs, and a control unit for controlling the matrix driver unit. The display device has a data storage unit for storing brightness-corrected data prepared according to the characteristic brightness of each of the LEDs, selects the brightness- corrected data stored in the data storage unit according to externally provided display data, and drives the LEDs according to the selected brightness-corrected data. This arrangement minimizes brightness difference among the LEDs due to fluctuations in the characteristics of the LEDs.