| 发明名称 |
LIGHT EMITTING ADVERTISEMENT DEVICE |
| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light emitting advertisement device which sufficiently utilizes light emission performance of a light emitting diode and increases luminance of the light emitting diode to improve visibility of an advertisement for viewers. <P>SOLUTION: The light emitting advertisement device where the light emitting diode is provided to constitute an LED display part 5 is provided with a current value setting means 3 for setting a current value of a current to be supplied to the light emitting diode of the LED display part 5 and power limiting means 2 and 4 which limit the current value of the current to be supplied to the light emitting diode to a current value equal to or lower than a prescribed threshold at intervals of a prescribed time for a certain time in the case that the current value setting means 3 has set the current value of the current to be supplied to the light emitting diode to a current value higher than the prescribed threshold. <P>COPYRIGHT: (C)2004,JPO</p> |
| 申请公布号 |
JP2004021065(A) |
申请公布日期 |
2004.01.22 |
| 申请号 |
JP20020178107 |
申请日期 |
2002.06.19 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
MAEZONO KENSUKE |
| 分类号 |
G09G3/32;G09G3/20;H01L33/00;(IPC1-7):G09G3/32 |
主分类号 |
G09G3/32 |
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