Dot-matrix LED display device having brightness correction circu

Details Dot-matrix LED display device having brightness correction circu Dot-matrix LED display device having brightness correction circu

1995-07-10

1998-02-10

Powell, Mark R.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345147, G09G 332

Patent

active

057174172

ABSTRACT:
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.

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Patent Abstracts of Japan, vol. 18, No. 50 (P-1683), Jan. 26, 1994, JP-A-5 273939, Oct. 22, 1993.

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