LED backlight device and LCD device

摘要

A backlight device (100) includes a first substrate (10), and an LED thin-film layered structure (11) (epitaxially grown inorganic material layers) fixed to a surface of the first substrate. An anode electrode (14) and a cathode electrode (15) are formed on the LED structure. An anode driver IC (31) and a cathode driver IC (32) are provided for driving the LED structure. A wiring structure (12,13) electrically connects the anode driver IC and the anode electrode of the LED structure, and electrically connects the cathode driver IC and the cathode electrode of the LED structure. A second substrate (40) has an optical transparency and is disposed to face the surface of the first substrate on which the LED structure is formed. A phosphor (41) is formed on a surface of the second substrate facing the first substrate. Alternatively the second substrate can be omitted and the phosphor formed directly on the LED structure, in which case either a planarization layer (10a) or a reflection layer (18) and a protection layer (19) are formed on the substrate.