Image display panel, image display panel installation equipment, and manufacturing method for image display panel

An image display panel comprising:

• a plate-like body comprising a metal main portion and a surface layer portion provided on a front surface side of the plate-like body, the surface layer portion absorbs light more than the metal main portion, and
• concave grooves that are formed on the front surface side of the plate-like body, at a predetermined pitch and extending through the surface layer portion into the metal main portion, the metal main portion is exposed on the front surface side by the concave grooves, wherein
• the concave grooves are formed such that both side surfaces thereof are substantially parallel in each minute section,
• at least one of the concave grooves is formed while a depth of the at least one of the concave grooves is adjusted along a line direction of the at least one of the concave grooves to change a width of the side surfaces of the at least one of the concave grooves along the line direction.

A manufacturing method for an image display panel which displays an image by a plate-like body comprising the steps of:

• preparing a plate-like body that comprises a metal main portion and a surface layer portion provided on a front surface side of the plate-like body, the surface layer portion being made of a material that absorbs light more than the metal main portion;
• carving concave grooves on the front surface side of the plate-like body whereby the concave grooves extend through the surface layer portion and into the metal main portion such that the metal main portion is exposed on the front surface side;
• forming both side surfaces of the concave grooves that are substantially parallel in each minute section;
• adjusting a depth of at least one of the concave grooves along a line direction of the at least one of the concave grooves thereby changing a width of the side surfaces of the at least one of the concave grooves along the line direction.