US 2010/0073327 A1 · USER INPUT DEVICE WITH DYNAMIC AMBIENT LIGHT CALIBRATION

Abstract

A user input device to generate a shutter threshold adaptive to ambient light conditions. The user input device includes a sensor array, a shutter controller, and a threshold generator. The sensor array obtains image data in response to light incident on the sensor array. The shutter controller is coupled to the sensor array. The shutter controller controls a shutter time during which the sensor array is responsive to the light incident on the sensor array according to a shutter value. The threshold generator is coupled to the shutter controller. The threshold generator dynamically generates a shutter threshold corresponding to the shutter value. The shutter threshold defines a transition of a finger-on/off state.

Claims20

Dependent claims

A user input device comprising:

a sensor array to obtain image data in response to light incident on the sensor array;
a shutter controller coupled to the sensor array, the shutter controller to control a shutter time during which the sensor array is responsive to the light incident on the sensor array according to a shutter value;
and
a threshold generator coupled to the shutter controller, the threshold generator to dynamically generate a shutter threshold corresponding to the shutter value, the shutter threshold to define a transition of a finger-on/off state.

1 more element

Dependencies are inferred from the claim text.

User input device with dynamic ambient light calibration

Life of this patent

User input device with dynamic ambient light calibration

Life of this patent

Abstract

Claims20