Patent ID: 9030517
Filing Date: 2015-05-12
Classification: G02B,G03G,G06K,H04N

Abstract:
1. A device for generating a pixel clock signal, comprising: a time interval detection unit detecting a time interval between a first set of first and second signals and a time interval between a second set of first and second signals, each set in cyclically repeating N time periods in one scanning cycle, N being an integer having a value greater than or equal to two; a comparing unit cyclically selecting a different target value from N target values corresponding to the N time periods and outputting an error indicating a difference between the detected time interval and the selected different target value for each of the N time periods; a frequency calculation unit correcting a frequency of the pixel clock signal based on the error and cyclically generating a frequency specification signal indicating the corrected frequency for each of the N time periods; a high-frequency clock generating unit generating a high-frequency clock signal; a pixel clock generating unit generating the pixel clock signal based on the frequency specification signal and the high-frequency clock signal; and an indicator signal generating unit generating an indicator signal indicating one of the N time periods based on the first set of first and second signals or the second set of first and second signals, wherein the comparing unit selects the different target value based on the indicator signal and wherein the frequency calculation unit includes an average frequency calculation unit configured to