Display panel associated with light collecting plate and position adjusting method using microlenses for the display panel

A position adjusting method for a display panel to be fixed to a light collecting plate having a plurality of lenses, comprising steps of:

• preparing the display panel which comprises an array substrate including a matrix array of pixel electrodes opposed to the lenses of the light collecting plate, a plurality of electrode wiring lines formed along rows and columns of the pixel electrodes, and a driver circuit formed outside a display area corresponding to the matrix array of the pixel electrodes, for driving the pixel electrodes via the electrode wirings;
• a counter substrate which includes a counter electrode opposed to the matrix array of the pixel electrodes;
• a liquid crystal layer held between the array substrate and the counter substrate;
• and a plurality of alignment marks which is formed on one of the array substrate and the counter substrate from which light applied via the light collecting plate is output, arranged to be opposed to the lenses, and separated from the display area by a distance corresponding to an integer number of times of a pitch of the pixel electrodes in at least one of row and column directions of the pixel electrodes;
• and
• adjusting a positional relationship between the focal spots of the lenses and the alignment marks such that the focal spots of the lenses are aligned with the pixel electrodes.