-G-
Term (Acronym) [units]: Definition
Gamut: See Color Gamut.
Gate Electrode: The "row" electrode in an AMLCD that controls whether a voltage is applied to a sub-pixel.
Generation (Gen): Flat-panel glass-substrate sizes (generations) are generally agreed upon throughout the display industry, at least within certain limits for each generation. Gen-1 is 300 mm x 400 mm, while Gen-8 (the largest currently made) is 2200 mm x 2500 mm.
Ghosting: The temporary trail left by a moving object on a slow LCD panel. Also, a phenomenon that occurs when voltage from an energized pixel leaks to an adjacent off pixel and turns it partially on.
Graphic Display: See Dot Matrix Display.
Graphics Controller: A generic term used to describe the graphics hardware in a PC. The graphics controller is responsible for generating the video signal that is sent to the monitor.
Grating Light Valve (GLV): The Grating Light Valve, invented by Silicon Light Machine in California, is a MEMS display technology that competes with Texas Instruments’ Digital Light Projector (DLP) MEMS technology used in rear-projection TVs. The GLV diffracts laser light using an array of tiny movable ribbons mounted on a silicon base. Six ribbons form the diffraction gratings for each pixel; diffraction is used to separate and direct the desired colors of laser light. Sony has licensed GLV for use in a laser-illuminated projector, but as of mid-2006, has not yet released a product using it.
Grayscale: An achromatic scale ranging from black through a series of successively lighter grays to white.
-H-
Term (Acronym) [units]: Definition
Head-Mounted Display (HMD): An HMD is a personal display device that is worn on the head like a pair of sunglasses (or attached to a helmet) so that video information is displayed directly in front of the eyes. HMDs always incorporate microdisplays with magnifying lenses. HMDs can be monocular (single display) or binocular (dual displays). HMDs can also include head-movement tracking devices to allow the user to "look around" a virtual reality environment naturally just by moving the head.
High Temperature Polysilicon (HTPS): The process of creating polysilicon films at high temperatures above 600°C. This is above the melting point of non-alkali glass, so quartz must be used. HTPS LCDs are always small microdisplays.
High-Definition Television (HDTV): The broadcasting of television signals with significantly higher resolution than allowed by traditional formats (NTSC, SECAM and PAL). HDTV is broadcast digitally, so its introduction sometimes coincides with the introduction of digital television (DTV). Current HDTV resolution standards are defined as 720 progressive lines or 1080 progressive or interlaced lines, using a 16:9 aspect ratio.
High-Gain Screen: A screen that uses one of many methods to collect light and reflect it back to the audience which dramatically increases the brightness over a conventional screen.
Hue: The main attribute of a color that distinguishes it from other colors. Chromatic colors have hues; white, grays and black have no hue.
