A rib structure for a display device includes a light-transmissive rib structure
containing therein a material absorbent of visible light so that a visible light
absorption distance is 40 to 1200 m (the visible light absorption distance
L (m) means a distance such that visible light decreases to exp(-;T/L) times
less in connection to the travel distance T (m), that is, visible light
is absorbed by 1-exp(-;T/L)).
