| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical printer head, etc., which can easily reduce variations in emission intensity of light-emitting elements and can be made compact and low-cost. SOLUTION: The optical printer head is constituted of a plurality of light- emitting diodes (L1-L128) arranged in an array, field effect transistors (TR1-TR128) connected in series to the light-emitting diodes, shift transistors (FF1-FF128) for exciting the field effect transistors separately by supplying driving signals separately to gates of the field effect transistors, and an emission control means for letting the light-emitting diodes emit light by supplying emission signals having different signal levels corresponding to the light-emitting diodes to the light-emitting diodes to which the field effect transistors are connected when the field effect transistors are excited separately. |
