DRIVING METHOD FOR IMAGE DISPLAY APPARATUS

摘要

Disclosed herein is a driving method for an image display apparatus which includes an image display panel having a plurality of pixels arrayed in a two-dimensional matrix and each configured from a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color, and a signal processing section. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, a third subpixel output signal, and a fourth subpixel output signal. The driving method includes a step of calculating a maximum value (Vmax(S)) of brightness, a saturation (S) and brightness (V(S)), and determining the expansion coefficient (α0).

主权项

1. A driving method for an image display apparatus which includes
(A) an image display panel including a plurality of pixels arrayed in a two-dimensional matrix and each configured from a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color; and (B) a signal processing section capable of (1) calculating a first subpixel output signal based at least on a first subpixel input signal and an expansion coefficient (π0) and outputting the calculated first subpixel output signal to the first subpixel, (2) calculating a second subpixel output signal based at least on a second subpixel input signal and the expansion coefficient (α0) and outputting the calculated second subpixel output signal to the second subpixel, (3) calculating a third subpixel output signal based at least on a third subpixel input signal and the expansion coefficient (α0) and outputting the calculated third subpixel output signal to the third subpixel, and (4) calculating a fourth subpixel output signal based on the first subpixel input signal, second subpixel input signal and third subpixel input signal and outputting the calculated fourth subpixel output signal to the fourth subpixel, the driving method comprising: a step of setting the expansion coefficient (α0) to a value represented by the relationship
α0=BN4/BN1-3+1, where BN1-3 is a luminance of a set of a first subpixel, a second subpixel and a third subpixel which configure a pixel when a signal having a value corresponding to a maximum signal value of the first subpixel output signal is inputted to the first subpixel and a signal having a value corresponding to a maximum signal value of the second subpixel output signal is inputted to the second subpixel and besides a signal having a value corresponding to a maximum signal value of the third subpixel output signal is inputted to the third subpixel and BN4 is a luminance of a fourth subpixel which configures the pixel when a signal having a value corresponding to a maximum signal value of the fourth subpixel output signal is inputted to the fourth subpixel.