Abstract: An integrated circuit for controlling an array of LEDs includes at least one signal amplifier, signal processing means, driver means for driving the array of light emitting diodes, at least one switch, and control means for controlling the integrated circuit. The integrated circuit is formed using silicon-on-insulator technology and is selectively shielded from the array of LEDs. The integrated drive electronics with silicon-on-insulator technology will allow for improved white light generation.

Abstract: A scan-exposure apparatus comprises a detector for detecting the values of the digital modulation signal in adjacent time series and the differences of the values therebetween and an exposure time changing device for compensating the time spans of the modulation signal. The detector detects the values of the digital modulation signal in two adjacent units of the time series and the difference between the values. An exposure time compensation device adjusts time spans of the time series of the modulation signal. Thus, the modulation signal pattern is rendered similar to the exposure of the exposure beam.