发明名称 |
DEVICE FOR CONTROLLING LIGHT-EMITTING DIODES WITH VERY HIGH LUMINANCE RANGE FOR VIEWING SCREEN |
摘要 |
The general field of the invention is that of devices for controlling luminance of lighting devices comprising light-emitting diodes. The control device is driven by a cyclic input signal of determined period, each period comprising an activation time representative of a determined luminance level. The control device comprises analogue electronic means generating a second control signal for the intensity of the electric current passing through the light-emitting diodes, the amplitude of the second control signal being an increasing function of the activation time in such a way that the combination of the cyclic input signal and of the second signal applied to the light-emitting diodes gives a greater luminance range than the range of the cyclic input signal. |
申请公布号 |
US2012306946(A1) |
申请公布日期 |
2012.12.06 |
申请号 |
US201213487108 |
申请日期 |
2012.06.01 |
申请人 |
SCHOU GUY;RENAUD FREDERIC |
发明人 |
SCHOU GUY;RENAUD FREDERIC |
分类号 |
G09G3/36;G09G5/10;H05B37/02 |
主分类号 |
G09G3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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