Patent ID: 8093796

Claim:
An image display apparatus, comprising an airtight container including: an electron beam apparatus; an image forming member for forming an image with electrons emitted from the electron beam apparatus, which is located in opposed relation to the electron beam apparatus with an internal space maintained therebetween at a pressure lower than the atmospheric pressure; and a plate-like spacer located between the electron beam apparatus and the image forming member, wherein the electron beam apparatus includes a substrate; a first electrode wiring formed on the substrate; an insulating layer covering the first electrode wiring; a second electrode wiring formed on the insulating layer so as to cross the first electrode wiring; and on the substrate, an electron emitting device located distant from an electrode wiring crossing region where the first and second electrode wirings cross each other, and connected to both the first and second electrode wirings so as to receive drive energy from the first and second electrode wirings, wherein a void is formed between the first and second electrode wirings in at least a part of the electrode wiring crossing region, a plurality of the second electrode wirings are arranged in parallel to each other, the void is formed in the electrode wiring crossing region of each of the second electrode wirings, the plate-like spacer is arranged only on a part of the second electrode wirings, the electron beam apparatus includes a plurality of electron emitting devices, the image forming member includes a plurality of phosphors corresponding to the plurality of the electron emitting devices, respectively, and the deflection ω of the second electrode wiring caused at the center of the void by the pressure imposed by the spacer on the second electrode wiring due to the pressure difference between the inside and the outside of the airtight container satisfies the relation: ω=3.42×10 −7 ×( m×a 4 )/ h 3 <(1−(1/∈))× t, where m: (interval of the spacers×width of pixel along the longitudinal direction of the spacers)/(thickness of the spacer×width of the first electrode wiring) a: Half value (m) of maximum width of the void h: Thickness (m) of the second electrode wiring ∈: Dielectric constant of the insulating layer t: Thickness (m) of the insulating layer, wherein the pixel is a phosphor of the image forming member corresponding to each electron emitting device.