Abstract: There is provided a surface luminous source panel comprising an irregular reflection layer carrying on it a large number of irregular reflector specks and arranged on the surface of a transparent substrate. The reflection layer has a parallel pattern section having an area of irregular reflector specks per unit length of the layer which smoothly increases with the distance from a light source along the panel; and a regulating pattern section located close to the light source and partially surrounded by the parallel pattern section. The regulating pattern section has a hill-shaped contour starting from the edge close to the light source and an area of irregular reflector specks per unit length of the layer also smoothly increasing with the distance from the light source but at a rate smaller than that of the parallel pattern section.

Abstract: There is provided an edge light panel having a very even brightness. The edge light panel equipped with an irregular reflection layer and surrounded by a front surface diffusion layer, a rear surface reflection layer and peripheral edge reflection layers is additionally provided with margin reflection layers arranged along the front margin of the edge light panel, except along the peripheral edge juxtaposed with a primary light source. While the margin reflection layers may be separately arranged, they may also be integrally formed with the peripheral edge reflection layers, the rear surface reflection layer and the front surface diffusion layer. A narrow gap is advantageously provided between the edge light panel and the front surface diffusion layer and/or the rear surface reflection layer.

Abstract: There is provided an edge-illuminating emitter panel or edge light panel in a liquid crystal display device. The edge light panel includes a transparent resin substrate having an irregular reflection surface with a mesh pattern formed thereon. A mesh size of the pattern varies with the distance away from a primary light source which is juxtaposed with a side of the substrate. The side is so finished as to provide a rough surface for permitting light issued from the light source to effectively enter the substrate. The rough surface is continually formed along the side. The thus formed rough surface ensures the light incident on the side a sure entrance as well as a sure difusion thereof, whereby the edge light panel improves the display device in brightness and uniformity of in display clarity. The rough surface may be formed intermittently or formed on at least a part of the side.