Patent ID: 7830339
Filing Date: 2010-11-09
Classification: G09G

Abstract:
1. An image display apparatus comprising: a rear plate having arranged thereon a plurality of electron-emitting devices; a face plate having arranged thereon a plurality of light-emitting regions, respectively corresponding to the plurality of electron-emitting devices; a spacer arranged between the rear plate and the face plate; and a drive circuit having a correction circuit which corrects input image data, said drive circuit driving the electron-emitting devices based on the image data corrected by the correction circuit, wherein a quantity of light emitted from an object light-emitting region depends on (i) a quantity of primary electrons coming from a corresponding object electron-emitting device and (ii) a quantity of secondary electrons coming from peripheral light-emitting regions of the object light-emitting region, and the quantity of light emitted from the object light-emitting region decreases when at least some of the secondary electrons coming from the peripheral light-emitting regions are blocked by the spacer, and wherein the correction circuit includes: a first circuit that calculates, based on a blocked quantity of the secondary electrons coming from the peripheral light emitting regions and blocked by the spacer, a value equivalent to the decrease in the quantity of light emitted from the object light-emitting region, a second circuit that calculates a correction value by multiplying the value equivalent to the decrease in the quantity of light by an adjustment gain value that complies with colors of the object light-emitting region, and a third circuit that adds the correction value to the input image data of corresponding to the object electron-emitting device, so as to reduce a color deviation between a region in the vicinity of the spacer and a region not in the vicinity of the spacer.