Patent ID: 8142054

Claim:
A light-emitting apparatus comprising a cathode electrode having a cold-cathode electron emission source and an anode electrode having a light emitter which emits light upon excitation by electrons field-emitted from said cold-cathode emission source, which are housed in a vacuum chamber, wherein a quartz glass substrate made from quartz glass is mounted via a clamping fixture, oppositely to an interior face of a light projection glass substrate which constitutes a light projection plane for said vacuum chamber wherein said clamping fixture holds a periphery of said quartz glass substrate and extends to and is affixed to non-light projection plane sides of said vacuum chamber, in a manner which separates the quartz glass substrate from the light projection glass substrate by forming a separate vacuum layer in-between, and wherein said anode electrode is mounted on said quartz glass substrate, at a side facing said cathode electrode.