Organic light emitting diode driver
AssigneeInfineon Technologies AG
InventorJose Luis Ceballos
Life of this patent
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Abstract
Disclosed are controllable drive circuits for powering an organic light emitting diode (OLED) or other electronic load. According to one implementation, a circuit structure is provided that applies a pulse width modulated (PWM) drive current to an OLED. The time-average drive current to the OLED can be modulated in accordance with a periodically sampled control signal. In turn, the luminance of the OLED can be suitably varied over a control range. Circuit structures provided may be fabricated at least in part on a common substrate such that respective integrated circuit devices are defined. In one or more implementations, at least a portion of drive circuits may be fabricated within a 65 nanometer (or smaller) environment.
Claims18
An electronic circuit, comprising:
- a first transistor;
- a second transistor;
- and
- a charge storage device, wherein the first transistor, the second transistor and the charge storage device are cooperatively configured to provide a pulse width modulated (PWM) drive current to a load in accordance with a periodic ramp signal and a control signal.
An electronic circuit, comprising:
- a first circuit portion configured to sample-and-hold a control signal in accordance with a periodic sampling signal;
- and
- a second circuit portion configured to provide a pulse width modulated (PWM) drive current to a load in accordance with a periodic ramp signal and the sampled-and-held control signal.
Dependencies are inferred from the claim text.