Chip, dynamic vision sensor, and method for outputting pixel information

A dynamic vision sensor, comprising the chip and the pixel output circuit,

• wherein the chip comprises a pixel array and a processing circuit, each pixel row in the pixel array comprises at least two pixel groups, and each pixel group comprises a plurality of pixels;
• the processing circuit is configured to:
• when it is detected that a light intensity value of at least one pixel in a first pixel group changes, generate a first signal, wherein the first signal comprises row location information of the first pixel group in the pixel array, and the first pixel group is any pixel group in the pixel array;
• and
• the processing circuit is further configured to:
• generate a second signal, wherein the second signal comprises column location information of a pixel row in which the first pixel group is located;
• and
• send the first signal and the second signal to a pixel output circuit, wherein the first signal and the second signal are used to enable the pixel output circuit to output location information of the first pixel group whose light intensity value changes in the pixel array
• wherein the pixel output circuit comprises a row arbitration circuit and a column selection circuit, and a clock signal of the row arbitration circuit is synchronized with a clock signal of the column selection circuit;
• the row arbitration circuit is configured to:
• receive a first signal sent by a processing circuit in the chip, determine row location information of a first pixel group in a pixel array based on the first signal, and send the row location information of the first pixel group in the pixel array to the column selection circuit;
• and
• the column selection circuit is configured to:
• receive a second signal sent by the processing circuit, receive the row location information that is sent by the row arbitration circuit and that is of the first pixel group in the pixel array, determine, based on the second signal, column location information of a pixel row in which the first pixel group is located, and output location information of the first pixel group in the pixel array.

A method for outputting pixel information by a dynamic vision sensor, wherein the method comprises:

• when it is detected that a light intensity value of at least one pixel in a first pixel group changes, generating a first signal and a second signal, wherein the first pixel group is any pixel group in a pixel array;
• determining row location information of the first pixel group in the pixel array based on the first signal, and determining, based on the second signal, column location information of a pixel row in which the first pixel group is located;
• and
• outputting location information of the first pixel group in the pixel array based on the row location information of the first pixel group in the pixel array and the column location information of the pixel row in which the first pixel group is located.