Vehicle rearview mirror system with protocol detection

An automatic dimming vehicle mirror system, said mirror system comprising:

• an automatic dimming mirror assembly, said mirror assembly comprising automatic dimming circuitry;
• said automatic dimming circuitry comprising a mirror control and at least a first silicon-based photo sensor and a second silicon-based photo sensor;
• said first silicon-based photo sensor being sensitive to both visible light and infrared light;
• said second silicon-based photo sensor being sensitive principally to infrared light;
• and
• said mirror control distinguishing headlamp sources from non-headlamp sources by a ratio of a signal indicative of light detected by said first silicon-based photo sensor to a signal indicative of light detected by said second silicon-based photo sensor.

An automatic dimming vehicle mirror system, said mirror system comprising:

• an automatic dimming mirror assembly, said mirror assembly comprising automatic dimming circuitry;
• said automatic dimming circuitry comprising a mirror control and at least a first photo diode sensor and a second photo diode sensor;
• said first photo diode sensor being sensitive to both visible light and infrared light;
• said second photo diode sensor being sensitive principally to infrared light;
• and
• said mirror control distinguishing headlamp sources from non-headlamp sources by a ratio of a signal indicative of light detected by said first photo diode sensor to a signal indicative of light detected by said second photo diode sensor.

An automatic dimming vehicle mirror system, said mirror system comprising:

• an automatic dimming mirror assembly, said mirror assembly comprising automatic dimming circuitry;
• said automatic dimming circuitry comprising a mirror control and at least a first light-to-frequency photo sensor and a second silicon-based light-to-frequency photo sensor;
• said first light-to-frequency photo sensor being sensitive to both visible light and infrared light;
• said second light-to-frequency photo sensor being sensitive principally to infrared light;
• and
• said mirror control distinguishing headlamp sources from non-headlamp sources by a ratio of a signal indicative of light detected by said first light-to-frequency photo sensor to a signal indicative of light detected by said second light-to-frequency photo sensor.