Coverage of pixel sheet with protective layer

A process for covering a pixel sheet with a protective layer which comprises the steps of:

• preparing a pixel sheet comprising a light-transmissive substrate and-colored pixels which are arranged on the substrate separately from each other with a space area or a black resin area;
• preparing a photosensitive sheet which comprises a support and a photosensitive colored resin layer thereon containing a dye whose color disappears by application of heat;
• examining evenness of the surface of photosensitive colored resin layer by applying light onto the surface;
• combining the pixel sheet and the photosensitive sheet under the condition that the pixels and space area both are brought into contact with the photosensitive colored resin layer to give a combined body;
• separating the support of the photosensitive sheet from the combined body, leaving the photosensitive colored resin layer on the pixel sheet;
• exposing to light the pixel sheet having the photosensitive colored resin layer thereon so that the photosensitive colored resin layer is cured;
• and
• heating the light-exposed colored resin layer on the pixel sheet so that the colored resin layer is made colorless and the curing further proceeds.