Image sensor for sensing LED light with reduced flickering

An image sensor device, comprising:

• one or more of first pixels disposed in a substrate;
• one or more second pixels disposed in the substrate, wherein the first pixels have different geometric shapes from the second pixels in a cross-sectional side view;
• and
• a radiation-blocking structure disposed over the substrate, wherein the radiation-blocking structure defines one or more first openings, and wherein the radiation-blocking structure further defines one or more second openings.

An image sensor device, comprising:

• a first number of first pixels disposed in a substrate;
• a second number of second pixels disposed in the substrate, wherein the first number is substantially greater than or equal to the second number;
• a light-blocking structure disposed over the first pixels and the second pixels, wherein the light-blocking structure defines a plurality of first openings and second openings through which light can pass, wherein the first openings are disposed over the first pixels, wherein the second openings are disposed over the second pixels, and wherein the second openings have different sizes than the first openings;
• and
• a microcontroller configured to turn on different ones of the second pixels at different points in time, wherein the microcontroller is configured to turn on the different ones of the second pixels such that:
• a first subset of second pixels is turned on while a second subset of the second pixels is turned off;
• and
• the first subset of second pixels is turned off while the second subset of the second pixels is turned on.