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Light emitting diode control device with very large luminance dynamic range for display screen
Light emitting diode control device with very large luminance dynamic range for display screen
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机译:显示屏亮度动态范围非常大的发光二极管控制装置
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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 analog 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.
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