Sign & Digital Graphics

2012 Buyers Guide

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Page 77 of 103

DirectX—Microsoft's universal graphics driver software for Windows 95/98 and Windows NT PCs. Some software depends on DirectX for it graphics playback functions, thus DirectX must be present on any PC that plays back some scripts. Dirty Color—A color made from four or more pigments. Dithering—A process that simulates color variations or shades of gray by alternating the sizes and shapes of pixel groupings. This reduces the contrast between dots of different colors/ shades and creates a more-fl owing, natural look. An alternative to halftone. Dmin/Dmax—Measurement of the density of a printed image; to be exact, ability of a tone to absorb light. Dmin is the lowest density measurement, while Dmax is the highest. The Dmin/Dmax scale is 0-6, although a pure carbon black is 4 and most printers register a slightly lower measurement for blackest black. DM/PL—Programming instructions language used to connect a plotter with a computer. DM/PL is used in software drivers from some sign programs. DOD (Drop On Demand)—Piezo printhead technology in which inkjet nozzles fi re ink only when color is needed, instead of fi ring ink continuously and being defl ected away from the substrate when not needed, as in continuous inkjet systems. DOOH (Digital Out Of Home Advertising)—refers to that portion of advertising delivered in locations other than the home. Primary examples include billboards, movie theaters, and gas stations. Dot Gain—Effect produced when individual dots of color (as with an inkjet droplet) spread and become larger than their intended size, resulting in the darkening of a printed image. DPI (Dots Per Inch)—A unit of measure used to describe the resolution capability of a given piece of equipment by measuring the number of individual dots the device can reproduce in a linear inch. If the horizontal and vertical resolutions are different, typically both fi gures will be given. The higher the number of dots, the less easy it is to distinguish individual dots, making the image sharper. Double Tube—Two neon tubes running parallel to each other, often used for outlining or borders. Double Face—A sign with two parallel but opposing faces. Double Back—A 180-degree bend used in neon tubes to produce such letters as R, E, F and G. Often used to describe the technique and placement of the electrode on a neon unit. Drag Knife—A cutting edge mounted to turn freely. With sign plotters, the combined movements of the plotter head along the Y axis and the vinyl/ medium along the X axis causes the knife blade to turn to create straight lines and curves. Draw—The depth of the shaped letter or face from the original plane in the manufacture of plastic letters and sign faces by embossing, de-bossing, or vacuum-forming. Drawing Program—An application, often called a structured or vector drawing program, used to create and manipulate two-dimensional images and shapes as independent objects, as opposed to bitmap images. Dress—To prepare or put in a fi nished condition. In sign making, the faces, edges and corners of a sign and its art may all be dressed. Driver—Power supply for LED systems, providing low voltage output. Drum Scanner—Device utilizing a rotating drum, which artwork is mounted on. As the drum spins, light from the image enters a lens, allowing the image to be recorded in data as a series of fi ne lines. Because a drum scanner can record more digital information, it typically allows for easier image manipulation and a more detailed printed image. Dye—An organic-based colorant that may be dissolved in a liquid; esp., dye-based ink. Dye particles are much smaller than pigment particles. Dye Sublimation—Imaging process where colorants are vaporized with heat and pressure, and deposited on to a substrate to create an image. Typically it is a transfer process used in polyester- based fabric printing. Sublimation inks are mirror- printed on a donor material (transfer paper). The M SIGN & DIGITAL GRAPHICS image is then sublimated onto the fabric using a heat press. Dynamic Digital Signage (DDS)—(See Electronic Digital Signage) Dynamic Range—Measurement of contrast from highlight to shadow; in some cases, the number of shades per primary color (See RGB). Considered one of best ways to compare true ability of a scanner, although not all manufacturers measure and release fi gures on it. Dynamic Visual Messaging—The process of using animated graphic design to communicate to target audiences through signs and public displays. E Eco-Solvent Inks—Inks using a less-toxic solvent-based carrier. Printers using eco-solvent inks emit less harmful VOCs (volatile organic compounds). Edge—The part of the sign that encloses the back and face or faces. The frame. Electrode—A terminal that conducts an electrical current between two conducting substances. Electrodes are found at both ends of a neon unit. Electrolytic Capacitor—A type of capacitor that has a lot of capacity for its size and price. It contains an electrolyte than can dry out over time and that in turn decreases its capacity. Every 10C increase in operating temperature reduces the rated life of the capacitor by half. A 20C high temperature decreases life to 1/4. Electronic Digital Signage—A form of signage using plasma display panels (PDPs), liquid crystal displays (LCDs), light emitting diode signs (LEDs), and/or television (CRTs) in place of traditional signage. Content can be instantly updated, and multiple screens can be networked and managed from a single location. Electronic Digital Signage Network (DSN)— Delivery system for retail media, outdoor advertising and placed-based television content in public spaces, consisting of displays, software and hardware tied together through a computer network infrastructure. (Also known as dynamic digital signage; digital sign system, etc.) GLOSSARY

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