Research on construction and evaluation of the reproduction color gamut for the future laser TV
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RESEARCH
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Research on construction and evaluation of the reproduction color gamut for the future laser TV Yan Li*, Jing Wang and Na Li
Abstract This article builds the 3D gamut with three primary colors and standard white light of the laser TV, compares the reproduction gamut of the laser TV and liquid crystal display, qualitatively analyses the difference of their gamut characteristic, and quantificationally calculates the 2D gamut coverage ratio and 3D gamut volume. The result shows that compared with 2D gamut, 3D gamut can be more comprehensive and objective for evaluating the monitor’s color performance. This article also puts forward the realization rate of target gamut and gamut efficiency as the important parameters to evaluate the 3D reproduction ability of the displayer, thereby the objective evaluation system is created for the displayer. Using this system, this article evaluates the color effects of the future laser TV. It provides the theoretical values for ultra high-definition television system. Keywords: Laser TV, Ultra high-definition television (UHDTV) system, 3D color gamut, Color gamut volume
1. Introduction System of the recommendation ITU-R BT.709 [1] can only provide part of the visible colors that the human eyes can see. Because the reference RGB primaries defined in the recommendation were determined from the colorimetric characteristics of the phosphors generally adopted for a CRT monitor. So far, ITU-R BT.709 has being international recommendation for television broadcasting system whose gamut is called conventional gamut. But recent years, flat panel displays and cameras tend to be capable of reproducing and capturing more saturated colors located beyond the conventional gamut [2,3]. In August 2012, the International Telecommunication Union (ITU) put forward the ultra-high-definition television (UHDTV) Recommendation ITU-R BT.2020 [4]. The realization of this recommendation can offer more realistic sensation, higher transparency to the real world, and more accurate visual information compared with HDTV system [5]. It realizes the wide-gamut display in the true sense. However, the three primary colors of UHDTV are located in the spectral locus. It is difficult to achieve its specified gamut for the existing liquid crystal display (LCD), plasma display panel displayers, so it is necessary to develop a kind of displayer to fulfill the * Correspondence: [email protected] College of Physics and Electronic Information, Tianjin Normal University, Tianjin, China
recommendation UHDTV. Due to the good monochromaticity and high color purity of the laser [6], using the laser TV cannot only ensure the color of the reconstruction image, but also display the high saturation colors which are difficult to see in nature. In all, the future laser TV will be a development tendency to achieve the wide-gamut of UHDTV. This article analyzes the reproduction gamut of the future laser TV with the constructed 3D gamut, and defines the performance parameters to evaluate the reproduction ability o
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