Digital dimmer and method for varying the luminous intensity of an electronic light source

A method for varying the luminous intensity of an electronic light source by using a digital dimmer, said electronic light source comprising a LED and an electronic circuit configured to supply an alternating current to the LED, the method comprising the steps of:

• receiving a user command by an operation interface module of the digital dimmer,
• modulating by a control and processing module each half cycle of the alternating current on the basis of said user command by the control and processing module,
• characterized in that
• when the user command is to turn on the electronic light source at a dimming value lower than 25%, the method comprises the steps of:
• A. modulating by the control and processing module the alternating current at a first dimming value equal or higher than 30% in a given number of half cycles of the alternating current, wherein the duration of said given number of half cycles is equal or lower than 100 ms, so that it is not perceptible by the user's eye,
• B. after the step A. modulating by the control and processing module the alternating current at a second dimming value lower than 25%, so as to ensure that the user sees only that the electronic light source lights up at the second dimming value.