US 12,143,716 B2
Autofocus accuracy and speed using thermal input information
Yi Hsien Lin, Taipei (TW); Chih Hao Kao, New Taipei (TW); and Chien Chih Liao, Taipei (TW)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Jun. 10, 2022, as Appl. No. 17/837,257.
Prior Publication US 2023/0403464 A1, Dec. 14, 2023
Int. Cl. H04N 23/67 (2023.01); H04N 23/54 (2023.01)
CPC H04N 23/67 (2023.01) [H04N 23/54 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An imaging device, comprising:
an image sensor;
a lens assembly including a lens whose distance from the image sensor is adjustable from a minimum stroke distance to a maximum stroke distance, the minimum stroke distance being to focus an object at a maximum distance from the imaging device on the image sensor, and the maximum stroke distance being to focus the object at a minimum distance from the imaging device on the image sensor;
a temperature sensor configured to determine a temperature of the imaging device; and
a processor configured to instantiate a plurality of auto focus tables, each auto focus table being correlated to a particular temperature in an operating temperature range of the imaging device, to receive a first temperature from the temperature sensor, to select a first auto focus table associated with the first temperature, and to provide a first auto focus for the object based upon the first auto focus table, wherein each auto focus table provides a temperature compensated correlation of a first stroke distance associated with the object at the maximum distance from the imaging device, and a second stroke distance associated with the object at the minimum distance from the imaging device.