System and method for measuring ambient light
AssigneeSTMicroelectronics (Grenoble 2) SAS
InventorDavid Maucotel
Life of this patent
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Abstract
An electronic system includes a control circuit to provide a binary control signal alternating between a first binary state during first phases and a second binary state during second phases; a screen controlled by the control signal, the screen emitting light during each first phase, and to not emit any light during each second phase; a light sensor under the screen or along the edge of the screen, and providing a measurement signal representative of a quantity of light received by the sensor during a measurement phase or a plurality of consecutive measurement phases; and a synchronization device to synchronize each measurement phase with a second phase.
Claims16
An electronic system comprising:
- a control circuit configured to provide a binary control signal alternating between a first binary state during first phases and a second binary state during second phases;
- a screen controlled by the control signal, the screen being configured to emit light during each first phase, and to not emit any light during each second phase;
- a light sensor disposed under the screen or along an edge of the screen, and configured to provide a measurement signal representative of a quantity of light received by the sensor during a measurement phase or a plurality of consecutive measurement phases;
- and
- a synchronization device configured to synchronize each measurement phase with a second phase.
Dependencies are inferred from the claim text.