Quattron

Quattron is the brand name of an LCD color display technology produced by Sharp Electronics. In addition to the standard RGB (Red, Green, and Blue) color subpixels, the technology utilizes a yellow fourth color subpixel (RGBY) which Sharp claims increases the range of displayable colors,^[1][2] and which may mimic more closely the way the brain processes color information.^[3][4] The screen is a form of multi-primary color display, other forms of which have been developed in parallel to Sharp's version.^[5][6]

The technology is used in Sharp's Aquos LCD TV product line, particularly in models with screens 40 inches across and larger. It was at first introduced as “sub-pixel color technology” and then later coined into Quattron technology by Linda Lim from Sharp Malaysia.^[7] The technology, distinct from the product line, has been advertised featuring George Takei as the spokesperson in the debut commercial, in which he uses his catchphrase "Oh My".^[8] Another commercial had Takei advertising the 3-D model with the Minions from the 2010 movie Despicable Me.^[9] In Malaysia, the famous tagline was “4C has arrived, 3C is over” mimicking the attention of 4G technology trend at that moment, but was actually referring to its advanced color technology. The later version was known as Quattron Pro with further subdivided pixels applied to its HDTV range.

According to an analysis by Raymond Soneira, president of DisplayMate Technologies, a video calibration equipment producer, the industry-standard color spaces used by content providers mean there is no existing source material that contains the fourth color channel. He therefore concludes that any "extra" colors displayed must be created in the television itself through video processing, resulting in exaggerated, less accurate color.^[10]

Los investigadores del color de la Universidad Queen Mary de Londres investigaron la tecnología Quattron y descubrieron que, aunque Quattron tiene cuatro subpíxeles de color físicos, no tiene un cuarto color primario en la luz de fondo para activarlo (el amarillo tiene aproximadamente 575 nm). En otras palabras, Quattron tiene un subpíxel amarillo para dejar pasar la luz, pero el fabricante no ha tomado ninguna medida para producir la luz amarilla necesaria para atravesarlo. (El subpíxel amarillo simplemente deja pasar más luz roja y verde). Sobre esa base, concluyen que no cumple ninguna función útil. ^[11]

• Profundidad de color
• Gama
• Proceso oponente , una teoría del color que considera al amarillo como un color primario además del modelo de color RGB clásico ^[3]
• Familia de matrices PenTile (reproducción RGB mediante RG/BG, RG/BW alternados, etc.)
• Filtro RGBE : un filtro Bayer con "esmeralda" como cuarto color
• Hexachrome , un sistema para imprimir con seis colores
• Tetracromatismo , un sistema biológico diferente del tricromato, posiblemente presente en algunas personas
• Tricromatismo , descripción científica del modelo RGB para la visión humana

• Televisor LCD Aquos (sitio web de Sharp)
• Reseña del Sharp LC46LE821E: evaluación técnica del televisor Quattron por David Mackenzie en HDTVtest