Canon Patent for Foveon Style Multilayer AF Sensor

Egami (translated) spotted a patent for a new AF sensor. The patent describes a Foveon-like, multilayer sensor:

Patent Publication No. 2015-37217

• Published 2015.2.23
• Filing date 2013.8.12

Canon patent

• AF sensor
• In the depth direction, I comprises a first layer, the second layer, the photoelectric conversion portion of the third layer
• The second layer is for monitoring, detecting the amount of light that is received in real-time, to control the accumulation time
• The third layer in a bright environment, the dark environment so that the use of the first layer, sensitivity can be switched
• Furthermore, in a dark environment is used by adding the first and third layers