Information about Flip Disc Display
)
A bus in Stockport, United Kingdom with newly fitted flip dot destination and side route number displays.
)
Flip-disc display elements (close up)
The flip-disc display consists of a grid of small metal discs painted black on one side and a bright color on the other (typically day-glo yellow), set into a black background. In response to a microcontroller, the disc can be flipped to show either the colored or black side, using the colored side to form characters.
The basic operation is similar to that of core memory; a grid of X and Y wires carrying current generates a magnetic field where they cross, interacting with a small magnet on the disk's hinge. Only those discs at the crossing point of two powered wires will see enough force to flip over, those on the powered X or Y line only will see only 1/2 the required force. Once flipped, the disks stay in that state and no further power is needed to maintain it.
Typically the display works from top to bottom, powering each horizontal line "on" and then powering the needed vertical lines to set up that row. The whole process takes a few seconds, during which time the sound of the discs being flipped over is quite distinctive. The flip-disc display was developed by Kenyon Taylor at Ferranti-Packard in the 1970s. The displays were initially very expensive, and their first applications were in stock markets around the world. As their price fell, they were soon found in wider roles, notably highway signs and schedules at train stations and airports. The displays often required minor maintenance to free up "stuck" discs.
The system has virtually disappeared from use with the introduction of high-intensity LED-based products, which use power constantly but are easily visible in light and darkness and do not require much, if any, maintenance.
It was the system used to display scores, "Fast Money" information, and the "FAMILY FEUD" logo on the Richard Dawson (1976-85, 1994-95) and Ray Combs (1988-94) versions of Family Feud. It is sometimes incorrectly referred to as "Ferranti-Packard," as it is the company that made the boards.
References
Display technology | |
|---|---|
| Non-video | Electronic paper | Flip-dot display | Split-flap display | Incandescent matrix display |
| Video | Cathode ray tube | DLP | Field emission display | Laser TV | LED | LCD | OLED | Plasma display | Surface-conduction electron-emitter display | Vacuum fluorescent display |
| 3D display | Stereoscopic, s.a. Autostereoscopic | Volumetric, s.a. Laser beam |
| Static media | Hologram | Movie projector | Neon sign | Slide projector |
light-emitting diode (LED) is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n junction. This effect is a form of electroluminescence.
..... Click the link for more information.
..... Click the link for more information.
Blacklight Ink or blacklight-reactive Ink is ink that glows under a blacklight (a source of light whose wavelengths are primarily in the ultraviolet range). The paint may or may not be colorful under ordinary light. It is also known as Fluorescent.
..... Click the link for more information.
..... Click the link for more information.
microcontroller (or MCU) is a computer-on-a-chip. It is a type of microprocessor emphasizing self-sufficiency and cost-effectiveness, in contrast to a general-purpose microprocessor (the kind used in a PC).
..... Click the link for more information.
..... Click the link for more information.
Magnetic core memory, or ferrite-core memory, is an early form of computer memory. It uses small magnetic ceramic rings, the cores, to store information via the polarity of the magnetic field they contain.
..... Click the link for more information.
..... Click the link for more information.
Ferranti-Packard was the Canadian division of Ferranti's global manufacturing empire, formed by the 1958 merger of Ferranti Electric and Packard Electric. For several years in the post-war era the company underwent dramatic expansion and repeatedly almost
..... Click the link for more information.
..... Click the link for more information.
A stock market is a market for the trading of company stock, and derivatives of same; both of these are securities listed on a stock exchange as well as those only traded privately.
..... Click the link for more information.
..... Click the link for more information.
light-emitting diode (LED) is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n junction. This effect is a form of electroluminescence.
..... Click the link for more information.
..... Click the link for more information.
Richard Dawson (born November 20, 1932) is a British-born American actor, comedian, game show panelist and host. He is best known for his role as Bob Crane's British non-commissioned officer, Corporal Peter Newkirk, on the World War II situation comedy Hogan's Heroes
..... Click the link for more information.
..... Click the link for more information.
Raymond Neil Combs, Jr. (April 3, 1956 — June 2, 1996), was an American comedian and host of the game show Family Feud from 1988 to 1994.
..... Click the link for more information.
Early life and career
Combs attended Miami University in Oxford, Ohio, but never graduated...... Click the link for more information.
Family Feud is a television game show that pits two families against each other in a contest to name the most popular responses to a survey-type question posed of 100 people.
..... Click the link for more information.
..... Click the link for more information.
Electronic paper, also called e-paper, is a display technology designed to mimic the appearance of ordinary ink on paper. Unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, electronic paper reflects light like ordinary paper and is
..... Click the link for more information.
..... Click the link for more information.
split-flap display, sometimes simply flap display, is a display device that presents alphanumeric text, and possibly fixed graphics.
..... Click the link for more information.
Description
Each character position or graphic position has a collection of flaps on which the characters or graphics are painted or..... Click the link for more information.
Video (Latin for "I see", first person singular present, indicative of videre, "to see") is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion.
..... Click the link for more information.
..... Click the link for more information.
1. Electron guns 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red, green, and blue part of displayed image 7.
..... Click the link for more information.
..... Click the link for more information.
- For , see .
Digital Light Processing (DLP) is a technology used in projectors and video projectors. It was originally developed at Texas Instruments, in 1987 by Dr. Larry Hornbeck.
..... Click the link for more information.
This article contains information about a scheduled or expected .
It may contain preliminary information that does not reflect the final version of the product. A field emission display (FED
..... Click the link for more information.
It may contain preliminary information that does not reflect the final version of the product. A field emission display (FED
..... Click the link for more information.
This article contains information about a scheduled or expected .
It may contain preliminary information that does not reflect the final version of the product.
..... Click the link for more information.
It may contain preliminary information that does not reflect the final version of the product.
..... Click the link for more information.
light-emitting diode (LED) is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n junction. This effect is a form of electroluminescence.
..... Click the link for more information.
..... Click the link for more information.
liquid crystal display (commonly abbreviated LCD) is a thin, flat display device made up of any number of color or monochrome pixels arrayed in front of a light source or reflector.
..... Click the link for more information.
..... Click the link for more information.
An organic light-emitting diode (OLED), also Light Emitting Polymer (LEP) and Organic Electro-Luminescence (OEL), is any light-emitting diode (LED) whose emissive electroluminescent layer is comprised of a film of organic compounds.
..... Click the link for more information.
..... Click the link for more information.
plasma display panel (PDP) is a type of flat panel display now commonly used for large TV displays (typically above 37-inch or 940 mm). Many tiny cells located between two panels of glass hold an inert mixture of noble gases (neon and xenon).
..... Click the link for more information.
..... Click the link for more information.
This article contains information about a scheduled or expected .
It may contain preliminary information that does not reflect the final version of the product. A surface-conduction electron-emitter display (SED)
..... Click the link for more information.
It may contain preliminary information that does not reflect the final version of the product. A surface-conduction electron-emitter display (SED)
..... Click the link for more information.
vacuum fluorescent display (VFD) is a type of display used commonly on consumer-electronics equipment such as video cassette recorders, car radios, and microwave ovens. Unlike liquid crystal displays, a VFD emits a very bright light with clear contrast and can easily support
..... Click the link for more information.
..... Click the link for more information.
3D display is any display device capable of conveying three-dimensional images to the viewer.
There are many types of 3D displays: stereoscopic 3D displays show a different image to each eye; autostereoscopic 3D displays do this without the need for any special glasses or
..... Click the link for more information.
There are many types of 3D displays: stereoscopic 3D displays show a different image to each eye; autostereoscopic 3D displays do this without the need for any special glasses or
..... Click the link for more information.
This article or section needs sources or references that appear in reliable, third-party publications. Alone, primary sources and sources affiliated with the subject of this article are not sufficient for an accurate encyclopedia article.
..... Click the link for more information.
..... Click the link for more information.
Autostereoscopy is a method of displaying three-dimensional images that can be viewed without the use of special headgear or glasses on the part of the user. These methods produce depth perception in the viewer even though the image is produced by a flat device.
..... Click the link for more information.
..... Click the link for more information.
A volumetric display device is a graphical display device that forms a visual representation of an object in three physical dimensions, as opposed to the planar image of traditional screens that simulate depth through a number of different visual effects.
..... Click the link for more information.
..... Click the link for more information.
laser lighting display or laser light show involves the use of laser light to entertain an audience. A laser light show may consist only of projected laser beams set to music, or may accompany another form of entertainment, typically a rock concert or other musical
..... Click the link for more information.
..... Click the link for more information.
Holography (from the Greek, όλος-hòlòs whole + γραφή-grafè write) is the science of producing holograms
..... Click the link for more information.
..... Click the link for more information.
movie projector is an opto-mechanical device for displaying moving pictures by projecting them on a projection screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras.
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
