Patent ID: 7817115

Claim:
An image display apparatus comprising: a rear plate having a plurality of electron emitting devices; a face plate having a plurality of light emitting regions which correspond to each electron emitting device respectively; a spacer provided between the rear plate and the face plate; and a driving circuit including a correction circuit for obtaining a correction value from an image signal of a first frame and correcting the image signal of a second frame using the correction value, the second frame being subsequent to the first frame, the driving circuit driving the plurality of the electron emitting devices based on the corrected image signal corrected by the correction circuit, wherein a quantity of light emitted from a predetermined light emitting region is influenced by an amount of primary electrons from the corresponding electron emitting device and an amount of secondary electrons from an adjacent light emitting region, and wherein in a case where the quantity of light emitted from the predetermined light emitting region is reduced because at least some of the secondary electrons from the adjacent light emitting region are blocked by the spacer, the correction circuit obtains a correction value, corresponding to the reduced light emission amount due to blocking of the secondary electrons by the spacer, from the image signal of the first frame, and performs a correction by adding the correction value to the image signal for the corresponding electron emitting device of the second frame, the correction circuit includes a decision unit for comparing a first value that is a first correction value obtained from the image signal of the first frame with a first threshold value and comparing a second value that is the image signal for the corresponding electron emitting device of the second frame with a second threshold value, and uses a value obtained by multiplying the first value by an adjustment gain which is less than one as the correction value to be added to the image signal for the corresponding electron emitting device in case where the first value is greater than the first threshold value and the second value is less than the second threshold value.