Image-forming apparatus
OwnerYasuyuki Todokoroinventor
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Abstract
An image-forming apparatus comprises an image-forming means in an envelope. The image-forming means includes a member (e.g. thin film electrode) which is carried on the inner surface of the envelope and is adapted to application of electron-accelerating voltage Va. The member-carrying part (usu. transparent face plate) of the envelope also carries on its outer surface a means for applying a voltage substantially equal to the voltage Va (e.g. electroconductive layer connected to the thin-film electrode by way of a certain resistance). The electric field across the part is significantly reduced to thereby prevent migration of sodium ions contained in the part (usu. made of soda lime glass).
Claims22
An image-forming apparatus comprising an envelope and an image-forming means having a member adapted to application of voltage Va, characterized in that the member carrying on the inner surface thereof said member adapted to application of voltage Va and constituting part of the envelope also carries a means for applying a voltage substantially equal to said voltage Va.
Dependencies are inferred from the claim text.