| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of carrying out an appropriate lighting volume control in accordance with its state of use, while restraining destruction or degradation of an LED, as well as a display device excellent in visibility and display quality. <P>SOLUTION: The lighting device is provided with a light source 1 for emitting light in accordance with drive current, a temperature detecting means 4 for detecting temperature of the light source 1, a drive current setting means IM for setting a drive current IL in accordance with temperature T of the light source, a second drive current setting means IR for setting a required drive current in accordance with signals from outside, and a control means 63 for deciding on the drive current IL of the light source 1 in accordance with the signals of the IM and IR. It is so structured to variably change an allowed current IM of the light source 1 so that the drive current IL of the light source 1 shall not exceed a permissible current in the light source temperature while the light source temperature T is monitored. <P>COPYRIGHT: (C)2007,JPO&INPIT |
