Dithering mask and method of forming the same
A method of forming a dithering mask includes providing a specific sub-dithering mask, and generating a plurality of sub-dithering masks of the dithering mask by adjusting the specific sub-dithering mask. The dithering mask generated by the method includes a plurality of sub-dithering masks, each sub-dithering mask includes (4N)×(4N) dithering values, where N is an integer, and at least two sub-dithering masks of the plurality of sub-dithering masks have different contents. By breaking the regularity in the dithering mask, flickering patterns or visual patterns can be avoided on the screen, thereby raising the displaying quality of the screen.
1. A method of forming a dithering mask used in displaying images on a screen, wherein the dithering mask comprises a plurality of sub-dithering masks, the method comprising:
providing a specific sub-dithering mask; and
generating the plurality of sub-dithering masks of the dithering mask, wherein each of the plurality of sub-dithering masks is generated by adjusting the specific sub-dithering mask;
wherein a size of the specific sub-dithering mask is equal to a size of each of the plurality of sub-dithering masks; the specific sub-dithering mask comprises a plurality of dithering mask units, each dithering mask unit comprises a plurality of dithering values, and the step of generating two sub-dithering masks among the plurality of sub-dithering masks of the dithering mask comprises: rotating the plurality of dithering values clockwise in space domain to adjust positions of at least two dithering values among the plurality of dithering values so as to form one sub-dithering mask, and rotating the plurality of dithering mask units clockwise by a specific angle in space domain to adjust positions of at least two dithering mask units among the plurality of dithering mask units so as to form the other sub-dithering mask; and, all the sub-dithering masks are respectively formed by identical dithering values.
2. The method of claim 1 , wherein at least two sub-dithering masks of the plurality of sub-dithering masks have different contents.
3. The method of claim 1 , wherein the step of generating the plurality of sub-dithering masks of the dithering mask comprises:
rotating positions of units comprised within the specific sub-dithering mask.
4. The method of claim 1 , wherein the specific sub-dithering mask comprises four dithering mask units, and each dithering mask unit comprises four dithering values.