V-LED Light Source Instantaneous Switching for Endoscope Image Quality

The patent applies preliminary action by pre-charging a capacitor during the light non-emission period before the light emission period begins. This stored electrical energy is then rapidly discharged to the semiconductor light source at the start of the light emission period, enabling instantaneous full-brightness light output without waiting for the gradual rise time of the light source. This resolves the contradiction by preparing energy in advance so that when switching between different spectra occurs, the light source can immediately emit at full intensity rather than gradually ramping up, thus maintaining both image quality and sufficient illumination intensity.

The patent implements continuity of useful action by ensuring that illumination is provided without interruption through capacitive energy storage. During the light non-emission period when one light source is inactive, the capacitor charges up. When switching to the next light emission period, the capacitor immediately discharges to maintain continuous illumination. This eliminates dark periods during switching between different spectra, maintaining both image accuracy through sequential switching and continuous useful action by preventing loss of illumination periods.

The patent uses preliminary action by charging the capacitor during the light non-emission period before image capture begins. When the light emission period starts and coincides with the image capture timing, the capacitor is immediately discharged to provide full light amount instantly. This eliminates the need to extend rise time, as the pre-stored energy delivers the necessary light amount exactly when needed for image capture, maintaining both illumination intensity and timing alignment precision.