Patent ID: 7134776

Claim:
A direct backlight placed behind a display panel of a display device to supply light to said display panel, comprising: a light source; a diffuser plate for diffusing light emitted from said light source; a chassis having a part thereof disposed opposite to said diffuser plate with respect to said light source, for supporting said light source and said diffuser plate; and a spacer pin formed of a resin and erected from said part of said chassis toward said diffuser plate, said spacer pin comprising: a semispherical portion forming one end portion on said diffuser plate side; and a frustum portion forming the other end portion on said part of said chassis side, and one end of said frustum portion on said part of said chassis side being larger in thickness than the other end on said semispherical portion side, a radius of curvature of the tip of said semispherical portion being 0.3 mm to 1 mm, the thickness of the end of said frustum portion on said semispherical portion side being 1.1 mm to 2 mm, and a ratio (L/B) being less than 5 where B is the thickness of the end of said frustum portion on said part of said chassis side, and L is a length from the end of said spacer pin on said diffuser plate side to the end thereof on said part of said chassis side.