Patent ID: 7760231

Claim:
A method for a display comprises: a) outputting a first display image from the display for at least one display frame time, wherein the first display image comprises a first portion including a first set of intensity values in a first pattern and a second portion including a second set of intensity values in a second pattern; b) thereafter outputting a second display image from the display for at least one display frame time, wherein the second display image comprises a first portion including a third set of intensity values in the first pattern and a second portion including the second set of intensity values in the second pattern, wherein the display displays a temporally composite image in response to first display image and in response to the second display image, wherein the composite image includes a first region comprising a combination of the first set of intensity values of the first display image in the first pattern and the third set of intensity values of the second display image in the first pattern, and comprising a second region comprising the second set of intensity values in the second pattern, wherein the temporally composite image is substantially flicker-free; and c) thereafter receiving a display control signals for the display from a user in response a visual comparison of intensity values of the first region in the composite image on the display compared to intensity values of the second region in the composite image on the display.