Guest writes in 2005:
The screens were supposed to be FLAT since the very begginings of the TV (including those B/W ones), but they couldn't solve the picture distortion problems, so all TV's were made with the screens shaped as a cut of a sphere.
The first to address these problems was SONY making so called TRINITRON screens, which were shaped as a cut of a cylinder, but also making it proprietary, which made it very expencive for everyone else to produce it (TYPICALLY SONY). Only a few very expencive computer monitors were produced as TRINITRONs (NOKIA, NEC, PHILIPS). To solve the distortion problems, SONY stored the correction patterns in EEPROM, reading it repeatedly while displaying lines/frames (Everyone who had fixed older TRINITRON monitors & TV sets knows how complicated those circuits were).
The new TV sets might have really flat screen (sometimes marked as "PURE FLAT"), but the producer had to solve the distortion problems, including the FOCUS correction during each line (that must be complicated - regulating 5kV voltage at 15kHz or higher). That's why so many those "FLAT" screen TV's have actually distorted picture. Go to any consumer electronics shop - if you find more than 10% TV's WITHOUT ANY DISTORTION, I'll buy you a lunch!
Friday, January 11, 2008
Define: Flat Screen
Mel writes:
It is a CRT screen that is perfectly flat. If you would like to own one, check out www.FreeFlatScreens.com/?r=10948674 for a chance to earn one at no cost but a little effort on your part. I just got one and it is great.
I just received one from the site that I referred to and am now trying to help my grandson earn one. One of the advantages of the flat screen is the you get a clear view of the picture no matter at what angle you view it whereas the old CRTs give you a distorted picture when viewed from an angle.
It is a CRT screen that is perfectly flat. If you would like to own one, check out www.FreeFlatScreens.com/?r=10948674 for a chance to earn one at no cost but a little effort on your part. I just got one and it is great.
I just received one from the site that I referred to and am now trying to help my grandson earn one. One of the advantages of the flat screen is the you get a clear view of the picture no matter at what angle you view it whereas the old CRTs give you a distorted picture when viewed from an angle.
Defining 'Flat Screen TV'
Chris Cento Aug. 14, 2007:
Flat screen TV is one of the most popular and exciting TV technologies today. At only a few inches thick, flat screen TVs offer unparalleled flexibility and convenience. Older conventional TV's, in fairness to them, did offer crisp and vibrant images. However, these TV's, which operate through a cathode ray tube (CRT), suffered from one major drawback, they were bulky. As screen size increased, so did the bulk and weight. However, the TV of old has reached its twilight years. New television technologies have enabled TV manufacturers to create TVs with wider screen size yet still only a few inches thick. Thus, flat screen TVs usher home entertainment into the 21st century.
Flat Screen TV basically refers to two technologies: Plasma and LCD. The advances in these two technologies have enabled TV makers to build thin, lightweight TV screens with a large picture area. Plasma and LCD both offer similarly large, lightweight, flat screen TV's but the similarities are skin deep for their inner workings are different.
Flat screen TV is one of the most popular and exciting TV technologies today. At only a few inches thick, flat screen TVs offer unparalleled flexibility and convenience. Older conventional TV's, in fairness to them, did offer crisp and vibrant images. However, these TV's, which operate through a cathode ray tube (CRT), suffered from one major drawback, they were bulky. As screen size increased, so did the bulk and weight. However, the TV of old has reached its twilight years. New television technologies have enabled TV manufacturers to create TVs with wider screen size yet still only a few inches thick. Thus, flat screen TVs usher home entertainment into the 21st century.
Flat Screen TV basically refers to two technologies: Plasma and LCD. The advances in these two technologies have enabled TV makers to build thin, lightweight TV screens with a large picture area. Plasma and LCD both offer similarly large, lightweight, flat screen TV's but the similarities are skin deep for their inner workings are different.
Defining Flat Screen TV
AV Greek writes in January, 2007:
The thing to look for when buying a flat-tube TV is something called dynamic focus. Within the inside of the set is usually two or three rheostats on the flyback that regulate focus at different points on the CRT. Depending on where the beam is on the CRT, the set will use that particular focus point.
RCA/Thomson was one of the first manufacturers to use this system on their ProScan models back in the early 90's. Their sets however were not flat tubes, but they had extremely wide angle, sort gun picture tubes, and this feature was necessary to achieve good focus at the screen corners.
Needless to say, you are not going to find this on the little $99.99 wal-mart specials, so likewise, those flat-tube TV's look terrible. Purchase one of the higher end Japanese sets, like a Trinitron Wega, and you'll be sure to get it!
The thing to look for when buying a flat-tube TV is something called dynamic focus. Within the inside of the set is usually two or three rheostats on the flyback that regulate focus at different points on the CRT. Depending on where the beam is on the CRT, the set will use that particular focus point.
RCA/Thomson was one of the first manufacturers to use this system on their ProScan models back in the early 90's. Their sets however were not flat tubes, but they had extremely wide angle, sort gun picture tubes, and this feature was necessary to achieve good focus at the screen corners.
Needless to say, you are not going to find this on the little $99.99 wal-mart specials, so likewise, those flat-tube TV's look terrible. Purchase one of the higher end Japanese sets, like a Trinitron Wega, and you'll be sure to get it!
Please define "flat screen" TV
PlameNSL writes in 2005:
The screens were supposed to be FLAT since the very begginings of the TV (including those B/W ones), but they couldn't solve the picture distortion problems, so all TV's were made with the screens shaped as a cut of a sphere.
The first to address these problems was SONY making so called TRINITRON screens, which were shaped as a cut of a cylinder, but also making it proprietary, which made it very expencive for everyone else to produce it (TYPICALLY SONY). Only a few very expencive computer monitors were produced as TRINITRONs (NOKIA, NEC, PHILIPS). To solve the distortion problems, SONY stored the correction patterns in EEPROM, reading it repeatedly while displaying lines/frames (Everyone who had fixed older TRINITRON monitors & TV sets knows how complicated those circuits were).
The new TV sets might have really flat screen (sometimes marked as "PURE FLAT"), but the producer had to solve the distortion problems, including the FOCUS correction during each line (that must be complicated - regulating 5kV voltage at 15kHz or higher). That's why so many those "FLAT" screen TV's have actually distorted picture. Go to any consumer electronics shop - if you find more than 10% TV's WITHOUT ANY DISTORTION, I'll buy you a lunch!
The screens were supposed to be FLAT since the very begginings of the TV (including those B/W ones), but they couldn't solve the picture distortion problems, so all TV's were made with the screens shaped as a cut of a sphere.
The first to address these problems was SONY making so called TRINITRON screens, which were shaped as a cut of a cylinder, but also making it proprietary, which made it very expencive for everyone else to produce it (TYPICALLY SONY). Only a few very expencive computer monitors were produced as TRINITRONs (NOKIA, NEC, PHILIPS). To solve the distortion problems, SONY stored the correction patterns in EEPROM, reading it repeatedly while displaying lines/frames (Everyone who had fixed older TRINITRON monitors & TV sets knows how complicated those circuits were).
The new TV sets might have really flat screen (sometimes marked as "PURE FLAT"), but the producer had to solve the distortion problems, including the FOCUS correction during each line (that must be complicated - regulating 5kV voltage at 15kHz or higher). That's why so many those "FLAT" screen TV's have actually distorted picture. Go to any consumer electronics shop - if you find more than 10% TV's WITHOUT ANY DISTORTION, I'll buy you a lunch!
Define: Flat Screen
Report: "Term most oftenly used when referring to a flat-panel display. A flat screen implies a traditional CRT with a flat picture tube. The items that you will find here at PresentationMart are flat-panel displays, thin display screens that utilize a number of technologies including plasma and LCD (liquid crystal display). For a more indepth explanation of these types of technologies, please refer to our Display Definition reference guide in the Resources section of our site."
Definitions Of 'Flat Screen'
www.merinoinnovation.com/wps/wcm/connect/en/Tools/glossary/
www.presentationmart.com/resources/glossary.asp
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