- Response time (technology)
technology, response time is the timea systemor functional unittakes to react to a given input.
data processing, the responsetime perceived by the end useris the interval between :(a) the instant at which an operator at a terminal enters a request for a response from a computerand :(b) the instant at which the first character of the response is received at a terminal. In a data system, the system response time is the interval between the receipt of the end of transmission of an inquiry messageand the beginning of the transmission of a response message to the station originating the inquiry.
Federal Standard 1037Cand MIL-STD-188.
In real-time systems the response time of a task or thread is defined as the time elapsed between the dispatch (time when task is ready to execute) to the time when it finishes its job (one dispatch). Response time is different from WCET which is the maximum time the task would take if it were to execute without interference. It is also different from deadline which is the length of time during which the task's output would be valid in the context of the specific system.
Response time is the amount of time a pixel in an LCD monitor takes to go from black to white and back to black again. It is measured in
milliseconds (ms). Lower numbers mean faster transitions and therefore fewer visible image artifacts.
Older monitors with long response times would create a smear or blur pattern around moving objects, making them unacceptable for moving video. Long response times can be annoying to a viewer depending on the type of data being displayed and how rapidly the image is changing or moving. Many current LCDs' monitor models have improved to the point that this is rarely seen.
A figure of 8 to 16 ms for rise + fall times is typical. The response time was traditionally recorded at the full black > white transition which became the ISO standard for this specification on LCDs. Grey transitions are far more common in practice but in terms of pixel latency, they remained significantly behind the ISO transition. In recent years there have been a wide range of [http://www.tftcentral.co.uk/advanced.htm Response Time Compensation] (RTC) / overdrive technologies [cite web |url=http://www.r2d.com.tw/index.php?lang=en&page=glrt&menu=service&q=q002#q002|title=Detailed animation of overdrive technology] introduced which have allowed panel manufacturers to significantly reduce grey transitions. Response times are now commonly quoted in "G2G" (alternately "GTG," meaning: "grey-to-grey" [ [http://www.pureoverclock.com/article641-2.html TN Film, MVA, PVA and IPS – Which one's for you?] ] ) or "GLRT" (meaning: "Gray Level Response Time" [cite web |url=http://www.r2d.com.tw/index.php?lang=en&page=glrt&menu=service&q=q001#q001|title=Illustrations of GLRT and MPRT] ) figures and specs of 6ms, 4ms and 2ms G2G are widely available. There are various names used for RTC technologies, and these vary from one manufacturer to another. Terms such as ClearMotiv (Viewsonic), AMA (BenQ), MagicSpeed (Samsung) and ODC (LG.Philips) are widely used to identify RTC enabled displays.
In comparison, a CRT displaying a picture with an update frequency of 60 to 80 Hz could be said to have a response time of 12.5 ms and upwards. However, as the picture is updated completely (and virtually instantly) each time the electron beam passes over the screen, CRTs do not have the same problems with smearing or ghosting. The same is true for
plasma displays (however, both CRTs and plasma displays can have problems with flicker).
LCD screens with a high response time value are often unsuitable to play fast paced computer games.The pixel response time is often confused with the LCD input lag which adds another form of latency to pictures displayed by LCD screens. An LCD screen with high response time and significant input lag will not give satisfactory results when playing fast paced computer games or performing fast high accuracy operations on the screen (e.g. CAD). Manufacturers only state the response time of their displays and do not inform customers of the
Wikimedia Foundation. 2010.
Look at other dictionaries:
Response time — may mean:*Response time (technology), the time a generic system or functional unit takes to react to a given input *Responsiveness, how quickly an interactive system responds to user input *Round trip delay time, in telecommunications *Reaction… … Wikipedia
Time — This article is about the measurement. For the magazine, see Time (magazine). For other uses, see Time (disambiguation). The flow of sand in an hourglass can be used to keep track of elapsed time. It also concretely represents the present as… … Wikipedia
Technology Integration — is a term used by educators to describe effective uses of technology by teachers and students in K 12 and university classrooms. Teachers use technology to support instruction in language arts, social studies, science, math, or other content… … Wikipedia
Technology readiness level — (TRL) is a measure used by some United States government agencies and many of the world s major companies (and agencies) to assess the maturity of evolving technologies (materials, components, devices, etc.) prior to incorporating that technology … Wikipedia
Time in Australia — UTC+08:00 … Wikipedia
Time Warner Cable — Type Public Traded as NYSE: TWC Industry Communications … Wikipedia
Time in the United States — Time in the United States, by law, is divided into nine standard time zones covering the states and its possessions, with most of the United States observing daylight saving time for part of the year.The time zone boundaries and DST observance… … Wikipedia
technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… … Universalium
Technology in Stargate — Naqahdah redirects here. For one of the archaeologically identified cultures of Pre Dynastic Egypt, see Naqadan culture. For the town on the west bank of the Nile in Egypt, see Naqada. For other uses, see Naqada (disambiguation). The most… … Wikipedia
Technology in Revelation Space — This article lists elements of technology in the fictional Revelation Space universe created by Alastair Reynolds. Contents 1 Abstractions and entoptics 2 Cache Weapons 3 Conjoiner Drive 4 … Wikipedia