| 摘要 |
<p>A laser beam controller comprises a basic pulse signal generating circuit (1), a delay circuit (26a-e), a delay control circuit (23-25,27-36), a pulse generating circuit (37-49) and a laser beam generator (18). The basic pulse signal generating circuit (1) generates periodically occurring basic pulse signal. The delay circuit (26a-e) delays the basic pulse signal. The delay control circuit (23-25,27-36) controls the delay time of the basic pulse in the delay circuit (26a-e) according to image data. The pulse generating circuit (37-49) generates an output pulse having a width corresponding to the delay time of the basic pulse signal. The laser beam generator (18) generates a laser beam for a duration corresponding to the width of the output pulse by said pulse generating circuit (37-49). According to the controller, any desired gradation of a pixel of the image is desirably produced. <IMAGE></p> |
