Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Cathode ray tube


Related Topics

In the News (Thu 18 Jul 19)

  
  Patents in Class 313/414
An electron gun for a cathode ray tube comprises a triode including a cathode, a control electrode and an accelerating electrode, a pre-focusing electrode unit adjacent to the triode, a main lens unit including a focusing electrode and a...
A cathode ray tube with a reduced beam spot size on a fluorescent screen is obtained by forming electron beam passing holes on the electrodes composing a triode portion of an electron gun to have horizontally and vertically asymmetric sh...
Disclosed is a cathode ray tube with an electron gun capable of improving a resolution of an image by preventing electron beams from striking electrodes and efficiently controlling a spot size that is susceptible to a change in current c...
www.freepatentsonline.com /CCL313-414.html   (2237 words)

  
 Patents in Class 313/474
A flat color cathode ray tube having excellent doming quality is obtained by improving the structure of a flat panel and by using a shadow mask made of AK (aluminum-killed) material.
A color cathode ray tube of the present invention includes an evacuated envelop that is structured from a panel having a phosphor screen on its inner surface, a neck portion containing therein an electron gun assembly, and a cone-shaped...
A color picture tube is disclosed, that comprises an outer sheath having a electron gun, the outer sheath being airtightly sealed, a face plate having light transmissivity and disposed on the front surface of the outer sheath, and a larg...
www.freepatentsonline.com /CCL313-474.html   (2190 words)

  
 CATHODE RAY TUBE MANUFACTURING AND RECYCLING:
The CRT glass industry’s ability to limit the use of lead in the manufacturer of new CRTs is a significant contribution to the electronic industry’s overall effort to reduce the use of substances of concern, and therefore the environmental impact of electronics manufacturing and the end-of-life electronics recycling and disposal.
CRT glass manufacturers have a high degree of confidence as to the composition of this recycled cullet since they know the glass was produced by their facility.
The CRT glass manufacturers remain supportive of the regulations, particularly the Glass-to-Glass Rule, in order to increase the recycled cullet available and maximize the potential amount of cullet that could be used with current technology.
www.nsc.org /ehc/epr2/nardone/nardone.htm   (4809 words)

  
 MONTEST-LCD monitor tester, Video Primer, Cathode Ray Tube CRT
The CRT was designed in the 1920's and although several changes have been made to the original design, the changes to the basic structure have been relatively minor.
It is ironic that although the vacuum tube industry has been reduced to a mere shadow of what it was in the early days of electronics, the CRT, the sole volume survivor of the vacuum tube days, appears as though it will be with us for many years to come.
Located closest to the heated cathode is a round disc, approximately the size and the shape of a dime with a small hole in the center.
www.montest.com /mon-apps.html   (1626 words)

  
 cathode-ray tube — FactMonster.com
cathode-ray tube, special-purpose electron tube in which electrons are accelerated by high-voltage anodes, formed into a beam by focusing electrodes, and projected toward a phosphorescent screen that forms one face of the tube.
To form a display, or image, on the screen, the electron beam is deflected in the vertical and horizontal directions either by the electrostatic effect of electrodes within the tube or by magnetic fields produced by coils located around the neck of the tube.
Vladimir Kosma Zworykin - Vladimir Kosma Zworykin Born: 1889 Birthplace: Murom, Russia Cathode ray tube—Zworykin...
www.factmonster.com /ce6/sci/A0810872.html   (210 words)

  
 TECH 45 PLASMA TELEVISIONS
If on the one hand there are still cathode ray tube conventional televisions, on the other hand, there are innovative display systems like liquid crystal display televisions and even what is known as plasma televisions.
In plasma televisions, the older cathode ray tube technology is left behind in favor of an atomic technology.
Just as the cathode ray tube televisions use different intensities of particles to produce differing colors, the plasma television also varies the intensity of the illumination to produce color changes.
tv.tech45.com /Plasma_TV.html   (584 words)

  
 Cathode Ray Tube Design
Cathode ray tubes were the primary electronic information display device for over half a century.
Also, we offer rebuilding and repair of cathode ray tubes in cases where customers have expensive or irreplaceable systems and their display or monitor is not working.
For example, the CRT technique of using molten glass rods to align, fasten and insulate a multiplicity of electrodes is a very inexpensive way to build prototypes.
www.ebeaminc.com /cathode-ray-tubes.htm   (414 words)

  
  Cathode Ray Tube monitors and technology behind imaging displays
A CRT monitor is a cathode ray tube, a specialized vacuum tube in which images are produced.
A cathode ray is a stream of electrons leaving the negative electrode, or cathode, in a discharge tube (an electron tube that contains gas or vapor at low pressure), or emitted by a heated filament in certain electron tubes.
A cathode ray tube is a vacuum tube that produces images when the phosphorescent surface, a screen,is struck by electron beams.
www.tccmonitor.com /cathode-ray-tube.php   (379 words)

  
  Cathode ray tube - Wikipedia, the free encyclopedia
The earliest version of the CRT was a cold-cathode diode, a modification of the Crookes tube with a phosphor-coated screen, sometimes called a Braun tube.
Cathode rays exist in the form of streams of high speed electrons emitted from the heating of cathode inside a vacuum tube at its rear end.
The tube for oscilloscope use is longer and narrower, reducing the deflection angle (presumably for greater accuracy/linearity?), and deflection is done by applying an electrical field via deflection plates built into the tube's neck.
en.wikipedia.org /wiki/Cathode_ray_tube   (3810 words)

  
 Cathode ray - Wikipedia, the free encyclopedia
evacuated glass tubes that are equipped with at least two electrodes, a cathode (negative electrode) and an anode (positive electrode) in a configuration known as a diode.
Cathode rays propagate in a straight line in the absence of external influences, but are deflected by electric or magnetic fields (which can be produced by placing high-voltage electrodes or magnets outside the vacuum tube - this explains the effect of magnets on a TV screen).
In addition to their use within cathode ray tubes, higher energy beams of relativistic electrons (generated by various types of electron beam accelerators) are extensively within many industries to perform precision electron beam welding, rapid curing of thermosetting plastics, and cross-linking of thermoplastics to improve their physical properties.
en.wikipedia.org /wiki/Cathode_ray   (482 words)

  
 CATHODE RAY TUBE : Encyclopedia Entry
Cathode rays exist in the form of streams of high speed electrons emitted from the heating of cathode inside a vacuum tube at its rear end.
The tube for oscilloscope use is longer and narrower, reducing the deflection angle (presumably for greater accuracy/linearity?), and deflection is done by applying an electrical field via deflection plates built into the tube's neck.
Indirectly-heated vacuum tubes (including CRTs) use Barium compounds and other reactive materials in the construction of the cathode and getter assemblies, normally this material will be converted into oxides upon exposure to the air, but care should be taken to avoid contact with the inside of all broken tubes.
www.bibleocean.com /OmniDefinition/Cathode_ray_tube   (3958 words)

  
 Cathode ray tube Summary
The rays exited the tube through the window into the air, showing that cathode rays were not a phenomenon exclusive to a vacuum.
The cathode rays were allowed to pass through a narrow aperture, effectively focusing them into a beam which appeared on the screen as a dot.
Indirectly-heated vacuum tubes (including CRTs) use Barium compounds and other reactive materials in the cionstuction of the cathode and getter assemblies, normaly this material will be converted into oxides upon exposure to the air, but care should be taken to avoid contact with the inside of all broken tubes.
www.bookrags.com /Cathode_ray_tube   (4896 words)

  
 Cathode ray tube
In a cathode ray tube, the electrons are carefully directed into a beam, and this beam is deflected by a magnetic field to scan the surface at the viewing end (anode), which is lined with luminescent material (usually phosphor).
In case of a television, the entire front area of the tube is scanned in a fixed pattern called a raster, and a picture is created by modulating the intensity of the electron beam according to the programme's video signal.
The tube for this kind of use is longer and narrower, and deflection is done by applying an electrical field.
www.news-server.org /c/ca/cathode_ray_tube.html   (549 words)

  
 Cathode-ray tube   (Site not responding. Last check: 2007-11-07)
The cathode-ray tube (CRT) is one of the main elements of an oscilloscope.
The tubes are produced with electrostatic and electromagnetic control, where electrostatic or magnetic fields deviate the electron beam respectively.
CRT consists of the glass bulb evacuated to a high vacuum, the cathode (a source of electrons), cathode heater, electrodes for brightness and focus control, several accelerating anodes, the pairs of horizontal and vertical capacitor plates deviating the electron beam, and fluorescing screen.
physics.nad.ru /Physics/English/osc_txt.htm   (304 words)

  
 cathode ray tube - Definition of cathode ray tube by Webster's Online Dictionary   (Site not responding. Last check: 2007-11-07)
A large glass envelope containing a negative electrode (the cathode) emits electrons (formerly called "cathode rays") when heated, as in a vacuum tube.
The electrons are accelerated across a large voltage gradient toward the flat surface of the tube (the screen) which is covered with phosphor.
CRTs also differ in their dot pitch, which determines their spatial resolution, and in whether they use interlace or not.
www.webster-dictionary.org /definition/cathode%20ray%20tube   (241 words)

  
 CATHODE-RAY TUBE,   (Site not responding. Last check: 2007-11-07)
an electron tube, or evacuated glass container, having at one end a cathode, or negative electrode, and a device called an electron gun that projects a beam of electrons against a luminescent screen at the opposite end of the tube.
Electric deflecting plates are used in small CRTs, whereas magnetic deflecting coils are used in large CRTs in which a large deflection is required, as in television tubes.
In CRTs containing electric deflecting plates, a horizontal pair of plates controls the up-and-down motion of the electron beam, and a vertical pair controls the left-to-right motion of the beam.
www.history.com /encyclopedia.do?vendorId=FWNE.fw..ca069400.a   (714 words)

  
 Cathode Ray Tube Think piece @ LaunchBase.com (Launch Base)   (Site not responding. Last check: 2007-11-07)
In time-domain mode, the usual mode, the horizontal deflection is proportional to time (measured out by a "sweep oscillator" in the oscilloscope), and the vertical deflection is proportional to the measured signal.
Unless the display is regularly cleaned with a dry cloth or special cleaning tissue (using ordinary household cleaners may damage anti-glare protective layer on the screen), after a few months the brightness and clarity of the image drops significantly.
While this accelerating voltage is high (typically from 7kV to 50kV depending on screen size, monochrome or color, direct view or projection), both the capacitance and flyback current are small (on the order of picofarads and nanoamperes respectively), so shocks from the accelerating voltage are typically embarrassing and painful but usually harmless.
www.launchbase.com /encyclopedia/Cathode_ray_tube   (3093 words)

  
 cathode ray tube   (Site not responding. Last check: 2007-11-07)
CRTs are found in computer VDUs and monitors, televisions and oscilloscopes.
A large glass envelope containing a negative electrode (the cathode) emits electrons (formerly called "cathode rays") when heated, as in a vacuum tube.
CRTs also differ in their dot pitch, which determines their spatial resolution, and in whether they use interlace or not.
burks.bton.ac.uk /burks/foldoc/54/17.htm   (228 words)

  
 cathode-ray tube
Vacuum tube in which a beam of electrons is produced and focused onto a fluorescent screen.
The tube itself is glass and coated inside with a fl graphite conducting paint, which is connected to one of three anodes.
A heated filament heats a metal-oxide coated cathode that emits electrons which pass through a positively charged anode that is held at several thousand volts and accelerates the electrons to a high speed beam.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0015949.html   (312 words)

  
 Cathode Ray Tube - Uncyclopedia, the content-free encyclopedia
The Cathode Ray Tube was invented by early Catholics in an effort to improve their plumbing.
The Cathode Ray Tube is a clear plastic tube, holding in the smell, whilst allowing Catholic plumbers to watch the faeces and urine flow out of the church and into the ground.
Pope Ray III (the inventor of Purgatory) made so much money for the Catholic Church, that he insisted that from then on, his name should pop up in all catholic developments, for example: the most successful Catholic-made computer game to date was named “Ray-man” in his honour.
www.uncyclopedia.org /wiki/Cathode_Ray_Tube   (555 words)

  
 FOXNews.com - Cathode-Ray-Tube TV Format Dying Slow, Quiet Death - Technology News | News On Technology
Sales of CRTs will fall from an estimated 14.4 million units this year to 10.4 million in 2007, while sales of LCD TVs are predicted to rise from 10.9 million units to 17.8 million.
"CRTs are just losing their buzz when you have competing TVs that have technology that's similar to the CRT for almost the same price," iSuppli analyst Riddhi Patel said.
Digital CRT sets sold today are capable of handling high-definition TV, and video experts say CRT technology still represents the gold standard in picture quality with the deepest fls and best color accuracy.
www.foxnews.com /story/0,2933,224019,00.html   (1314 words)

  
 How Products Are Made - Volume 2
A cathode-ray tube, often called a CRT, is an electronic display device in which a beam of electrons can be focused on a phosphorescent viewing screen and rapidly varied in position and intensity to produce an image.
Probably the best-known application of a cathode-ray tube is as the picture tube in a television.
A neon sign is a lighting display made of glass tubes that have been filled with a gas and bent into the shape of letters or decorative designs.
www.madehow.com /Volume-2   (3797 words)

  
 Deflection yoke for cathode ray tube patent invention
The deflection yoke for a cathode ray tube of claim 1, wherein the correction unit is formed with one of a permanent magnet and an electromagnet.
The deflection yoke for a cathode ray tube of claim 1, wherein the geometric distortions corrected by the correction unit comprise an NS pincushion distortion, a 1/2 NS pincushion distortion, an EW pincushion distortion, and a 1/2 EW pincushion distortion.
The deflection yoke for a cathode ray tube of claim 2, wherein the correction unit is formed with an electromagnet, and a first power supply for driving the correction unit, wherein the first power supply is independent of a second power supply driving the vertical and the horizontal deflection coils.
www.freshpatents.com /Deflection-yoke-for-cathode-ray-tube-dt20060817ptan20060181229.php?type=claims   (541 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.