Patent ID: 9721503
Date: 2017-08-01
CPC Classifications: G09G

Claim:
1. A display device comprising: a plurality of pixels arranged in a matrix on a substrate, each comprising a luminescent element and a drive transistor configured to supply current to the luminescent element for light emission; and a controller configured to correct a video signal supplied from outside to be supplied to the pixels for display, wherein the controller executes: an EL characteristics correction step of correcting the video signal with inverse luminescent characteristics of the luminescent element; and a TFT characteristics correction step of correcting the video signal with inverse drive characteristics of the drive transistor, the controller corrects in the TFT characteristics correction step, the video signal corrected in the EL characteristics correction step with the inverse drive characteristics of the drive transistor, the controller corrects in the TFT characteristics correction step, the video signal by curvilinear approximation using a curve approximated to a correction curve indicating the inverse drive characteristics, the curvilinear approximation is a correction method of approximating a correction curve expressed in an XY coordinate system with input data by X axis of coordinates and output data by Y axis of coordinates, the method comprising, when the X axis of coordinates is divided into sections, boundary points are set on the correction curve, and a correction curve segment between adjacent boundary points P obtaining a new boundary point Q in which when input data increments by xadr from a value xref1 of X coordinates at the boundary point P obtaining output data using a curve connecting the point P the curve approximated to the correction curve between the boundary points P a quadratic coefficient of xadr is smaller than 0 when the correction curve is convex upward and is larger than 0 when the correction curve is convex downward.