Driver for driving light emitting device
AssigneeHimax Technologies Limited
InventorCheng-Lung Chiang
Life of this patent
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Abstract
A driver for driving a light emitting device includes an output stage and a driving stage. The output stage is for outputting a driving current to the light emitting device according to a driving signal, wherein the light emitting device is coupled between the output stage and a second reference voltage different from the first reference voltage. The driving stage is for generating the driving signal to the output stage, wherein one of the third reference voltage and the fourth reference voltage is within a range between the first reference voltage and the second reference voltage, and the other of the third reference voltage and the fourth reference voltage is outside the range between the first reference voltage and the second reference voltage.
Claims12
A driver for driving a light emitting device, comprising:
- an output stage, coupled to a first reference voltage, for outputting a driving current to the light emitting device according to a driving signal, wherein the light emitting device is coupled between the output stage and a second reference voltage different from the first reference voltage;
- and
- a driving stage, coupled to a third reference voltage and a fourth reference voltage, for generating the driving signal to the output stage, wherein one of the third reference voltage and the fourth reference voltage is within a range between the first reference voltage and the second reference voltage, and the other of the third reference voltage and the fourth reference voltage is outside the range between the first reference voltage and the second reference voltage, and the driving stage comprises:
- a first driving unit, coupled to the third reference voltage and a fifth reference voltage, for receiving an input signal and generating a first driving signal according to the input signal;
- a second driving unit, coupled to the fourth reference voltage and the fifth reference voltage, for receiving the input signal and generating a second driving signal according to the input signal, wherein the fifth reference voltage is between the third reference voltage and the fourth reference voltage;
- and
- a combiner, coupled to the first driving unit and the second driving unit, for generating the driving signal by combining the first driving signal and the second driving signal.
A driver for driving a light emitting device, comprising:
- an output stage, for outputting a driving current to the light emitting device (LED) according to a driving signal;
- and
- a driving stage, coupled to the output stage, for generating the driving signal to the output stage, the driving stage comprising:
- a first driving unit, coupled to a first reference voltage and a second reference voltage, for receiving an input signal and generating a first driving signal according to the input signal;
- a second driving unit, coupled to a third reference voltage and the second reference voltage, for receiving the input signal and generating a second driving signal according to the input signal, wherein the second reference voltage is between the first reference voltage and the third reference voltage;
- and
- a combiner, coupled to the first driving unit and the second driving unit, for generating the driving signal by combining the first driving signal and the second driving signal.
Dependencies are inferred from the claim text.