| 摘要 |
<p>PURPOSE: To provide a surface light source device in which the color temperature and luminance of the light obtained from the surface light source using a light guide plate can be freely set, and the color temperature and luminance can be kept constant. CONSTITUTION: The emission from the surface of a light guide plate 2 by the edge part of which the lights from a plurality of light sources 1 having exclusive power sources 6 are received is detected by a sensor 3, the detection signal outputted from the sensor is amplified by an amplifier 5, and the amplified signal is passed through a correcting circuit 5 to control each power source 6.</p> |
