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Definition: RGBW

(RGB White) An LCD display technology that uses four subpixels (red, green, blue and white). In a regular RGB display, white is produced by illuminating R, G and B subpixels at their highest intensity; however, the color filters diminish some of the light. RGBW produces a brighter white because the white subpixel is not filtered.

An RGBW backlight is a light source for an LCD screen that uses red, green, blue and white LEDs. See RGB, RGBY, LCD and LED.