Patent ID: 6583812
Filing Date: 2003-06-24
Classification: H04N

Abstract:
A cathode ray tube phosphor screen inspecting method comprising:illuminating a panel of a cathode ray tube with light, in which a phosphor screen having a regular pattern is formed on an inner surface of a face of the panel, from the inner surface side of said face; imaging a light image reflected from the inner surface of said face; and specifying a defect on said phosphor screen from data obtained by said imaging; wherein said panel, and illuminating means for illumination and imaging means for imaging are moved relative to each other, and an amount of light from said illuminating means is changed in accordance with the relative movement such that the amount of illumination at an imaging position on said panel remains unchanged; and wherein a plurality of illuminating means are juxtaposed in a direction of movement relative to said panel, and an amount of light from each illuminating means is changed such that a total amount of light irradiated from said plurality of illuminating means onto the face inner surface remains unchanged.