Other

Tsutomu Kobayashi

Kenji Takano

Yoshiyuki Matsuoka

Yukio Akita

Kazutaka Otsuka

Yutaka Ichimura

Makoto Asako

Kozoh Satoh

A printer controller,sets compensation values, representing the positional deviations of LED array chips,in a delay circuit section,via shift register,and a latch circuit,The shift register,sequentially acquires bit map data from the printer controller,and supplies the acquired bit map data to an AND gate,through the latch circuit,Upon receiving a strobe signal from the printer controller,the delay circuit section,supplies the received strobe signal to the AND gate,after a delay time corresponding to a preset compensation value has lapsed. The AND gate,generates drive signals each being the logical product of the input bit map data and the strobe signal, and supplies them to the LED array chips,through a buffer,The LED array chips,make LEDs emit light at the timings corresponding to the positional deviations so that images are formed without a positional deviation. At least one of the LED array chips is unaligned with adjacent ones of the LED array chips and preset compensation values are obtained by interpolation based on detected positional deviations of sampled ones of the LED array chips.

Optical writing head driving device

Growing community of inventors

Higashiyamato, Japan

Tsutomu Kobayashi