Patent ID: 8508446

Claim:
An electronic circuit for a dynamic control of lighting sources, such as LEDs, semi-pixels, pixels and clusters, in variable message information panels, the circuit comprising: a plurality of elementary circuits consecutively connected in series to one another, each of said elementary circuits having a same configuration as another one of said elementary circuits, each of said plurality of elementary circuits having three switches and only one LED electrically connected to a current feed of a given value, a short-circuiting line of the LED, a contiguous elementary circuit and an output of a component or control circuit via respective said switches, wherein one or more of said elementary circuits are configured as closed circuits by piloting of said switches with said control circuit, each of said closed circuits having a chain of activated LEDs in a dynamically variable number, wherein a feed voltage is applied to a feed branch of a first active LED of the chain of activated LEDs and an output of said control circuit output is closed on a last active LED of the chain of activated LEDs, wherein one or more disabled LEDs are bypassed via a controlled closure of at least one of said switches on said short-circuiting line of said LED, wherein each of said elementary circuits is directly connected to a voltage source.