Patent ID: 8987652
Filing Date: 2015-03-24
Classification: G09G,H04N

Abstract:
1. A method of gathering ambient light sensor data in an electronic device having a display, an ambient light sensor, and control circuitry with an integrating analog-to-digital converter, wherein the integrating analog-to-digital converter has an integrating input and wherein the control circuitry has transistor circuitry coupled between the integrating input and the ambient light sensor, the method comprising: with the control circuitry, disabling the display for sample periods and enabling the display for hold periods that are interspersed among the sample periods; and during a first set of the sample periods, providing signals from the ambient light sensor to the integrating input through the transistor circuitry; during a second set of the sample periods, using the transistor circuitry to prevent signals from the ambient light sensor from reaching the integrating input; and with the control circuitry, producing an ambient light sensor signal using data gathered by the integrating analog-to-digital converter during the second set of sample periods and the data gathered by the integrating analog-to-digital converter during the first set of sample periods.