Light-emitting diode driving circuits and driving methods thereof
AssigneePrinceton Technology Corporation
InventorsChing-Piao Su, Chiung-Hung Chen, Chien-Te Hsu
Life of this patent
Estimating the term…
Abstract
A driving circuit includes a first PWM driving module and a second PWM driving module. The first PWM driving module generates a first square-wave signal to drive a first illumination unit according to a first data signal of a data stream, wherein the first square-wave represents an illumination period of the first illumination unit in a display cycle. The second PWM driving module generates a second square-wave signal to drive the second illumination unit according to a second data signal of the data stream, wherein the second square-wave signal, which has a different phase with the first square-wave signal, represents an illumination period of the second illumination unit in the display cycle.
Claims17
A driving circuit, comprising:
- a first PWM driving module, generating a first square-wave signal to drive a first illumination unit according to a first data signal of a data stream, wherein the first square-wave signal represents an illumination period of the first illumination unit in a display cycle, wherein a first register unit receives the first data signal and outputs the first data signal to the first PWM driving module;
- and
- a second PWM driving module, generating a second square-wave signal to drive a second illumination unit according to a second data signal of the data stream, wherein the second square-wave signal represents an illumination period of the second illumination unit in the display cycle, wherein a second register unit receives the second data signal and outputs the second data signal to the second PWM driving module, and the first square-wave signal has a different phase with the second square-wave signal,
- wherein a width of the first square-wave signal is different from a width of the second square-wave signal.
A driving method, driving a first illumination unit and a second illumination unit, comprising:
- generating a first square-wave signal according to a first data signal of a data stream, wherein the first data signal is buffered by a first register unit, wherein the first square-wave signal represents an illumination period of the first illumination unit in a display cycle, and a rising edge of the first square-wave signal is located at a beginning of the display cycle;
- driving the first illumination unit according to the first square-wave signal;
- generating a second square-wave signal according to the second data signal of the data stream, wherein the second data signal is buffered by a second register unit, wherein the second square-wave signal represents an illumination period of the second illumination unit in the display cycle, and a falling edge of the second square-wave signal is located at the end of the display cycle, and wherein the first square-wave signal has a different phase with the second square-wave signal, wherein a width of the first square-wave signal is different from a width of the second square-wave signal;
- and
- driving the second illumination unit according to the second square-wave signal.
Dependencies are inferred from the claim text.