Patent ID: 7863614

Claim:
An LED backlight device comprising: a first substrate having optical transparency and having a first surface and a second surface opposite to said first surface; an LED thin-film layered structure fixed to said first surface of said first substrate, said LED thin-film layered structure being formed of epitaxially grown inorganic material layers as a P-N junction device; an anode electrode and a cathode electrode provided on said LED thin-film layered structure; an anode driver IC and a cathode driver IC for driving said LED thin-film layered structure; an anode wiring provided on said first surface of said first substrate for electrically connecting said anode driver IC and said anode electrode of said LED thin-film layered structure; a cathode wiring provided on said first surface of said first substrate for electrically connecting said cathode driver IC and said cathode electrode of said LED thin-film layered structure; a phosphor provided on said second surface of said first substrate; a second substrate having optical transparency and having a first surface and a second surface opposite to said first surface, said first surface of said second substrate facing said first surface of said first substrate, and a reflection layer provided on said second surface of said second substrate.