Pixel structure with multiple transfer gates

A pixel structure comprising:

• a photo-sensitive element configured to generate a charge in response to incident light;
• a first transfer gate connected between the photo-sensitive element and a first charge conversion element;
• a second transfer gate connected between the photo-sensitive element and a second charge conversion element;
• an output stage arranged to output a first value related to charge at the first charge conversion element and output a second value related to charge at the second charge conversion element;
• a controller arranged to control operation of the pixel structure, the controller being arranged to cause the pixel structure to:
• switch off both the first and second transfers gates to acquire charges on the photo-sensitive element during an exposure period, wherein said exposure period corresponds to a time period during which the first and second transfer gates are switched off and during which the photo-sensitive element is exposed to an incident light;
• switch on the first transfer gate to transfer a first portion of the charges acquired during said exposure period from the photo-sensitive element to the first charge conversion element via the first transfer gate;
• and
• switch on the second transfer gate to transfer a second portion of the charges acquired during said exposure period from the photo-sensitive element to the second charge conversion element via the second transfer gate, wherein the second portion of the charges corresponds to remaining charges acquired during said exposure period.