Transcript PLASMA TV AND PLASMA

PREPARED BY:
MACHHI AKSHITA-130450112011
For the past many years, the majority of televisions have
been built using the Cathode Ray Tube. Recently, a new
alternative, the Plasma Display Panel (PDP) have
developed. The secret to PDP technology lie between
the two thin panels of mounted glass. Let’s open these
secrets.
Basic idea:
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Illuminates tiny coloured fluorescent lights to create an
image.
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Allows images much larger than CRTs and most LCDs
to be constructed
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Three fluorescent lights: red, green, blue form a full
range of colour.
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Each pixel is lit individually – images are very bright
and viewable at large angles
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Phosphors are vulnerable to damage from a positive charge.
The discharge is control by 2 display electrodes to avoid
changes implying directly on the phosphors.
Display electrode: one scans the frame data, the other is
controlled by display driver to apply high voltage to display
the image date.
Address electrode write the column display data into the
display cells.
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Voltage creates electric current
Xe & Ne atoms release
ultraviolet photons
Photons interact with phosphor
atoms
◦ Phosphors’ electrons jump
energy levels
◦ As electrons drop, visible
light photons are released
Varied pulses of current create
various colors of spectrum
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In a plasma TV the individual pixels are made from three tiny
containers of an inert gas such as neon or xenon.there are literally
hundreds of thousands of these tiny tubes on an average plasma TV
screen.
The computer controls the electrical field down to individual
pixels,allowing different combinations of Colours to glow, because a
plasma TV screen contains quite a few more pixels than a standard
television,the image is noticeably sharper.
Fig.pictorial view of a 81cm (diagonal),16.9 aspect ratio plasma
screen television
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Plasma TVs have deeper,richer blacks and better contrast
ratio.because plasma scrrens are highly reflective
glass,plasmas perform best in rooms with some degree of
light control.
A plasma TV is a high definition alternative to the standard
cathode ray televisions.A plasma TV provides sharp images
and vibrant colours,especially when used in conjuction with
high definition brodcasts.
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IMPACT
Plasma displays have more stopping power. Easily
seen and noticed.
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IMAGE
Spectacular image quality.
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FLEXIBILITY
Easily changed and updated.
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RESULTS
More appealing to watch. Very compelling, sexy and
dynamic.
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Home theater
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Network control room
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Meeting room
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Executive offices
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Touch screen
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Corporate lobbies
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Video conferencing