Photoelectric detector, PPG sensor, and electronic device

A photo plethysmo graph (PPG) sensor, comprising:

• a photoelectric detector, comprising
• a photo diode, configured to sense light on a first band, a second band, and a third band;
• at least one first optical filter part, located on the photo diode, and configured to transmit light on the first band and the second band and block light on the third band;
• and
• at least one second optical filter part, located on the photo diode, configured to transmit the light on the third band and block the light on the first band and the second band, and
• wherein a plurality of first optical filters and a plurality of second optical filters are arranged in a matrix with a plurality of rows and columns, and in the plurality of rows and columns, one first optical filter part and one second optical filter part are arranged alternately and cyclically in each row, and one first optical filter part and one second optical filter part are arranged alternately and cyclically in each column;
• a first light source, configured to send a first optical signal, wherein at least a part of light obtained after the first optical signal is reflected by skin or tissue of a user is on the first band;
• a second light source, configured to send a second optical signal, wherein at least a part of light obtained after the second optical signal is reflected by the skin or tissue of the user is on the second band;
• and
• a third light source, configured to send a third optical signal, wherein at least a part of light obtained after the third optical signal is reflected by the skin or tissue of the user is on the third band;
• wherein
• the photoelectric detector is configured to receive light on the first band and generate a first PPG signal, receive light on the second band and generate a second PPG signal, and receive light on the third band and generate a third PPG signal, wherein the first PPG signal, the second PPG signal, and the third PPG signal are used to detect physiological characteristics of the user.

An electronic device, comprising

• a photo plethysmo graph (PPG) sensor, comprising:
• a photoelectric detector, comprising
• a photo diode, configured to sense light on a first band, a second band, and a third band;
• at least one first optical filter part, located on the photo diode, and configured to transmit light on the first band and the second band and block light on the third band;
• and
• at least one second optical filter part, located on the photo diode, configured to transmit the light on the third band and block the light on the first band and the second band, and
• wherein a plurality of first optical filters and a plurality of second optical filters are arranged in a matrix with a plurality of rows and columns, and in the plurality of rows and columns, one first optical filter part and one second optical filter part are arranged alternately and cyclically in each row, and one first optical filter part and one second optical filter part are arranged alternately and cyclically in each column;
• a first light source, configured to send a first optical signal, wherein at least a part of light obtained after the first optical signal is reflected by skin or tissue of a user is on the first band;
• a second light source, configured to send a second optical signal, wherein at least a part of light obtained after the second optical signal is reflected by the skin or tissue of the user is on the second band;
• and
• a third light source, configured to send a third optical signal, wherein at least a part of light obtained after the third optical signal is reflected by the skin or tissue of the user is on the third band;
• wherein
• the photoelectric detector is configured to receive light on the first band and generate a first PPG signal, receive light on the second band and generate a second PPG signal, and receive light on the third band and generate a third PPG signal, wherein the first PPG signal, the second PPG signal, and the third PPG signal are used to detect physiological characteristics of the user.