1. A method for assembling a liquid crystal panel display, comprising the steps of: providing an imaging system having an image pick-up device with a variable focus and a display device on which images from said image pick-up device are displayed; disposing a first substrate, having a display portion including a matrix of pixels and a first alignment mark, at an arbitrary distance from said image pick-up device; disposing a second substrate, having a second alignment mark, between said image pick-up device and said first substrate at a respective arbitrary distance from said image pick-up device and said first substrate; separately focusing said image pick-up device to a first focal length to obtain focused images of said first alignment mark and separately focusing said image pick-up device to a second focal length to obtain focused images of said second alignment mark; simultaneously displaying said focused images of said first alignment mark and said focused images of said second alignment mark on said display device; shifting at least one of said first substrate and said second substrate relatively so that at least a portion of said first alignment mark in at least one of said focused images of said first alignment mark coincides with at least a portion of said second alignment mark in at least one of said focused images of said second alignment mark; and laminating said first substrate and said second substrate together while maintaining a predetermined distance therebetween.