Light modulated photodiode-based display monitor system

A display comprising:

• a test portion;
• and
• a light-modulated photodiode-based monitor for detecting a control signal of the display comprising:
• an emitter, configured to emit a pulsed signal;
• a polarizer configured to linearly polarize the pulsed signal;
• one or more fold mirrors, configured to perform at least one of:
• reflecting the pulsed signal from the emitter onto the test portion;
• or
• reflect the pulsed signal that has reflected off of the test portion,
• an analyzer, configured to block or transmit the polarized pulsed signal reflected from at least one of the fold mirror or the test portion,
• a detector, configured to receive the pulsed signal transmitted from the analyzer and convert the pulsed signal into an electrical signal,
• one or more processors;
• and
• a controller, configured to perform the steps of:
• receiving the electrical signal from the detector,
• filtering the electrical signal, wherein the filtered signal may be discerned from interfering signals created by an illumination of a viewable section of the display,
• rectifying the electrical signal, and
• comparing the electrical signal to a threshold to determine if the display is functioning properly.