| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED array element that can be improved in light utilization efficiency, and to provide an optical writing device that can perform high-speed printing, an optical reader that can obtain high-quality image signals, and a method of manufacturing the microlens array of the LED array element. <P>SOLUTION: The LED array element (10) has an LED array chip (11) having a plurality of LEDs (13); and a microlens array (12) having a plurality of microlenses (14) formed at positions at which the microlenses (14) are respectively faced to the LEDs (13), and a plurality of projecting structures (15) having higher heights than the microlenses (14) are brought into contact with the surface of the LED array chip (11) except the LEDs (13). These elements are fixed on the LED array. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
