Patent ID: 7212224

Claim:
A pixel clock creation device comprising: a high frequency clock creation unit creating a high frequency clock; a pixel clock creation unit creating a pixel clock based on the high frequency clock, a first horizontal sync signal and a phase data, the phase data indicating a timing of transition of the pixel clock; a first reference signal creation unit creating a first reference signal based on the high-frequency clock, the pixel clock and the first horizontal sync signal; a difference detection unit creating a second reference signal and a difference data based on the high-frequency clock, the pixel clock and a second horizontal sync signal, the difference data indicating a difference between the timing of transition of the pixel clock and a timing of transition of the second horizontal sync signal; a scanning interval data creation unit creating a scanning interval data based on the pixel clock, the first reference signal, the second reference signal and the difference data, the scanning interval data indicating a scanning interval related to the first horizontal sync signal and the second horizontal sync signal; and a phase data creation unit comparing the scanning interval data and a predetermined target value to output a comparison result, and creating the phase data based on the comparison result.