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Samsung unveils 4-color LCD

23 May 2003

At SID 2003, Samsung reveals a new color LCD that consumes half the power of traditional versions.

Samsung, the Korean electronics specialist, has unveiled a new type of liquid-crystal display (LCD) that uses four color sub-pixels instead of the usual three. It says that the new LCD has dramatically improved brightness and power consumption compared to its traditional 3-color counterparts.

The announcement was made at SID 2003, the leading annual event for the display industry which took place in Baltimore, US, this week. At the show, 4-color LCDs ranging from 2-inch in size for mobile phones to 17-inch for HDTV were demonstrated.

In addition to the red, green and blue sub-pixels found in a conventional 3-color display (RGB-LCD), Samsung’s latest invention has white sub-pixels that enhance its brightness.

In a RGB-LCD, the colored sub-pixels are made by transmitting white light from a fluorescent backlight through a RGB filter. In Samsung’s 4-color version the white light is also directed to clear white sub-pixels to increase the display’s luminance.

Samsung claims that its 4-color LCD has an increased luminance of 30-70% while consuming the same power as a conventional RGB-LCD. At an equivalent luminance level, the new display consumes just half the power.

Oliver Graydon is editor of Optics.org and Opto & Laser Europe magazine.

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