Patent ID: 8189109
Filing Date: 2012-05-29
Classification: G09G,H03L

Abstract:
1. A digital image converting method with auto-correcting phase, comprising the steps of: a. selecting one of a plurality of preset phases; b. using the selected preset phase to adjust the starting position of a clock signal; c. using the adjusted clock signal to perform analog-to-digital conversion on an analog display frame to obtain a digital display frame, wherein the digital display frame comprises a plurality of horizontal scan lines, wherein each of the plurality of the horizontal scan lines comprises a back porch and a front porch, wherein each porch has a number of pixels therein respectively; d. obtaining a smallest front porch among the front porches of the plurality of horizontal scan lines of the digital display frame, wherein the smallest front porch has the smallest number of pixels among the said front porches and a smallest back porch among the back porches of the plurality of horizontal scan lines of the digital display frame, wherein the smallest back porch has the smallest number of pixels among the said back porches; e. adding the number of pixels of the smallest front porch with the number of pixels of the smallest back porch to obtain a sum of pixel numbers and recording the sum of pixel numbers into a blank region of a registering block; f. judging whether or not all the preset phases are selected in sequence, wherein if all the preset phases are not selected in sequence, the above-mentioned steps are repeated; if all the preset phases are selected in sequence, a largest region in the registering block is taken as a specific region, wherein the recorded sums of pixel numbers in the specific region keep a specific value and are continuously distributed; and g. obtaining an optimal phase corresponding to a middle point of the specific region and using the optimal phase to perform analog-to-digital conversion on the analog display frame.