Patent ID: 8531444
Filing Date: 2013-09-10
Classification: G09G

Abstract:
1. An image display apparatus having a display screen configured of a plurality of pixels, the apparatus comprising: a measurement unit adapted to measure a distribution of light amount when the display screen carries out a display; a detection unit adapted to detect a display problem region in the display screen based on an imbalance in the display screen of the distribution of light amount measured by the measurement unit when a uniform image is displayed in the display screen; and a correction unit adapted to perform correction on an image signal that is to be displayed in the display screen so as to suppress the influence of the display problem region on the display, wherein the correction unit includes: an expected value calculation unit adapted to calculate an expected value of a distribution of light amount that is expected to be obtained when an image based on the image signal is displayed in the display screen; a difference value calculation unit adapted to calculate a difference value between the expected value and a measured value of a distribution of light amount measured by the measurement unit when an image based on the image signal corrected by the correction unit is displayed in the display screen; and a correction amount calculation unit adapted to calculate a correction amount for the display problem region detected by the detection unit based on the difference value, wherein the correction unit corrects the image signal based on the correction amount, and wherein the measurement unit is disposed in a boundary area of a front surface panel of the display screen.