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US 11,694,598 B2Granted
Display driving circuit and frequency correction method of display driving circuit
AssigneeLx Semicon Co., Ltd.
InventorHyeong Seok Kim
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Abstract
Disclosed are a display driving circuit and a frequency correction method of the display driving circuit, capable of quickly correcting a frequency change of a clock signal when a display device is driven at a low scan rate.
Claims13
A display driving circuit comprising:
- an oscillator configured to generate an oscillator clock signal;
- a timing controller configured to generate a pulse width modulation (PWM) synchronizing signal by using the oscillator clock signal;
- and
- a frequency correction circuit configured to set a correction period for measuring and correcting a frequency deviation between a frequency of the oscillator clock signal and a target frequency, by using the PWM synchronizing signal, generate a correction signal for correcting the frequency deviation based on the correction period, and output the correction signal to the oscillator,
- wherein the frequency correction circuit skips generation of the correction signal in a time section during which a display panel is driven according to a data enable (DE) signal.
2 more elements
A method of correcting a frequency of an oscillator in a display driving circuit, the method comprising:
- generating an oscillator clock signal;
- generating a pulse width modulation (PWM) synchronizing signal by using the oscillator clock signal;
- and
- correcting a frequency of the oscillator clock signal by using the PWM synchronizing signal,
- wherein the display driving circuit skips correction of the frequency of the oscillator clock signal during a time section during which a display panel is driven according to a data enable signal.
2 more elements
Dependencies are inferred from the claim text.