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frame dimming: adjusts the brightness of the entire backlight based on the content displayed, as if local dimming was supported but only with a single zone; local dimming: multiple vertical or horizontal zones are individually controlled; direct-lit (DLED) or full-array: LEDs form an array directly behind the screen at equally spaced intervals.
A more expensive version is called full-array or direct LED and consists of many LEDs placed behind the LC panel (an array of LEDs), such that large panels can be evenly illuminated. Full-array local dimming is often abbreviated as "FALD". This arrangement allows for local dimming to obtain darker black pixels depending on the image displayed.
The following table compares cathode-ray tube (CRT), liquid-crystal display (LCD), plasma and organic light-emitting diode (OLED) display device technologies. These are the most often used technologies for television and computer displays.
WLED array: The LCD panel is lit by a full array of white LEDs placed behind a diffuser behind the panel. LCDs that use this implementation will usually have the ability to dim or completely turn off the LEDs in the dark areas of the image being displayed, effectively increasing the contrast ratio of the display.
The display used an array of individually-controlled LEDs behind a conventional LCD panel in a configuration known as "local dimming". BrightSide later introduced a variety of related display and video technologies enabling visualization of HDR content. [28] In April 2007, BrightSide Technologies was acquired by Dolby Laboratories. [29]
A widespread practical application is using quantum dot enhancement film (QDEF) layer to improve the LED backlighting in LCD TVs.Light from a blue LED backlight is converted by QDs to relatively pure red and green, so that this combination of blue, green and red light incurs less blue-green crosstalk and light absorption in the color filters after the LCD screen, thereby increasing useful ...
Front and rear views of the TVM MD-3 cathode-ray tube monitor (Enhanced Graphics Adapter era). Note the DE-9 connector, cryptic mode switch, contrast and brightness controls at front, and the V-Size and V-Hold knobs at rear, which allow the control of the scaling and signal to CRT refresh rate synchronization respectively.
The Extended Graphics Array (XGA) or originally Extended Video Graphics Array (Extended-VGA, EVGA) [119] is an IBM display standard introduced in 1990. Later it became the most common appellation of the 1024 × 768 [ 1 ] [ 75 ] [ 103 ] [ 84 ] pixels display resolution.