Multiplexing, switching and testing devices and methods using fluid pressure

A fluid pressure actuated device for testing a light-emitting diode, the fluid pressure actuated device comprising:

• a first substrate side defining a first cavity;
• a first flexible membrane disposed across the first cavity, the first flexible membrane having an outer side facing a first direction away from the first substrate side, the first flexible membrane having an inner side facing into the first cavity in a second direction opposite the first direction;
• and
• an electrically conducting first contactor mounted on the outer side of the first flexible membrane;
• a second substrate side defining a second cavity;
• a second flexible membrane disposed across the first cavity, the second flexible membrane having an outer side facing the second direction away from the second substrate side, the second flexible membrane having an inner side facing into the second cavity in the first direction;
• and
• an electrically conducting second contactor mounted on the outer side of the second flexible membrane;
• an electrically conducting first connector in electrical communication with the first contactor and in electrical communication with the second contactor;
• a first image sensor in which current is induced upon the image sensor being illuminated, the image sensor facing the first direction;
• a third cavity formed in the second substrate side;
• a third flexible membrane disposed across the third cavity, the third flexible membrane having an outer side facing the second direction away from the second substrate side, the third flexible membrane having an inner side facing into the third cavity in the first direction;
• an electrically conducting third contactor mounted on the outer side of the third flexible membrane;
• and
• an electrically conducting second connector in electrical communication with the first image sensor and the third contactor, the second connector electrically isolated from the first connector.