Light control of a flash unit
AssigneeSony Ericsson Mobile Communications AB
InventorGunnar KLINGHULT
Life of this patent
Estimating the term…
Abstract
A device includes a flash unit to generate light, and an optical sensor to receive the light from the flash unit, and generate a light intensity signal based on the received light. The device also includes a controller to generate a modified error signal based on the light intensity signal. The device further includes a control circuit to receive the modified error signal from the controller, receive an output voltage from a power source associated with the device, control the output voltage based on the modified error signal, and provide the controlled output voltage to the flash unit.
Claims23
A method performed by a device, the method comprising:
- generating light with a flash unit associated with the device;
- receiving, directly from the flash unit, the generated light with an optical sensor associated with the device;
- generating, with the optical sensor, a light intensity signal based on the received light received directly from the flash unit;
- generating, with a controller associated with the device, a control signal based on the light intensity signal;
- receiving, by a control circuit associated with the device, the control signal;
- receiving, by the control circuit, an output voltage;
- controlling, with the control circuit, the output voltage based on the control signal;
- providing the controlled output voltage from the control circuit to the flash unit;
- and
- controlling the light generated by the flash unit based on the controlled output voltage.
(canceled)
A device comprising:
- a flash unit to generate light;
- an optical sensor to:
- receive the generated light directly from the flash unit, and
- generate a light intensity signal based on the generated light received directly from the flash unit;
- a controller to generate a modified error signal based on the light intensity signal;
- and
- a control circuit to:
- receive the modified error signal from the controller,
- receive an output voltage from a power source associated with the device,
- control the output voltage based on the modified error signal, and
- provide the controlled output voltage to the flash unit,
- where the flash unit adjusts an intensity of the light generated by the flash unit based on the provided controlled output voltage.
(canceled)
(canceled)
A device comprising:
- means for generating light;
- means for receiving light directly from the means for generating light;
- means for generating a light intensity signal based on the received light received directly from the means for generating light;
- means for generating a control signal based on the light intensity signal;
- means for receiving an output voltage;
- means for controlling the output voltage based on the control signal;
- and
- means for controlling the light generated by the means for generating light based on the controlled output voltage.
Dependencies are inferred from the claim text.