We have newly developed a 5‐primary‐color 60‐inch FHD LCD with pixels composed of R1CGR2BY six sub pixels. The prototype is designed to reproduce all of real surface colors. We have also improved its viewing angle performances by applying a multi‐primary color matching technology.

We propose a novel impulse driving method for the liquid crystal display, which improves motion picture quality without sacrificing maximum brightness. Moreover, we also propose new evaluation method for flat panel display in the bright environment, which reflect the display quality in the actual light situation.

Abstract— Multi‐primary‐color (MPC) display technology is one of the fastest emerging research areas in recent years. Wide‐color‐gamut display devices have been required for visually sufficient and/or accurate color reproduction. It is well known that MPC displays can reproduce accurate colors with high efficiency. In addition, not only the image‐quality improvement but some other performance of display devices is also required for display devices. This paper reviews achievements in MPC display technologies and focuses on the benefits of MPC displays: power‐savings and high resolution.

In this paper, we present the advantages of Multi-Primary Color (MPC) display devices compared to the conventional display devices with three (red, green, and blue) primary colors. Not only do we review the well-known advantages such as wide color gamut and wide viewing angles but also introduce the examples of numerical computation for the purposes of the luminance reproduction. According to the results, we also estimate the potentials of power-saving for RGB, RGB + Yellow, and RGB + White systems. It is shown that MPC systems are much superior to RGB-based systems in terms of power-saving. Not only does RGB + Yellow system widens color gamut but also reduces power consumption by 20% with respect to RGB-based systems.

We will consider the characteristics of LED backlights discussing merits and demerits of those characteristics which we will summarize. We have also evaluated combination with multiprimary color panels. By combining with multi-primary color panels, it will be possible to create new effects in Local Dimming technology.