Samsung ps42p2stx service manual

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Samsung Electronics 10-1

Glossary

AC PDP :
Plasma display driven by alternating current plasma electric discharge.

Address discharge(Reference : scan and data) :
Term with two meanings that can be used for both scan and data (write or erase) discharge.

Address Electrode(Reference : scan and data electrode) :
Term with two meanings that can be used for both scan and data electrodes.

Address pulse(Reference : scan and data pulse) :
Address drive wave form

Address voltage(reference; scan and data voltage) :
Address drive amplitude of vibration

Addressing :
Process that gives authorization to cells to allow for turning on and off by drive wave form.

Addressing speed :
Time necessary for writing and erasing.

ADS, address display separation :
Drive tech that separates address pulse temporarily from sustained voltage.

Aging :
The change of operation expectancy- for example, operation voltage change and luminance decline-related
characteristics.

Angular distribution :
Characteristics which change as function of angles between perpendicularity and surface.
referring to dependency on angles of, for example, luminance or chromaticity.

Aperture ratio :
Referring to the ratio of an element activation area to the gross area.

Area luminance :
Luminance measured in relatively large area.

Aspect ratio :
The ratio of screen width to height.

Auto power control :
Circuit means for controlling panel's average or maximum power.
Auxillary anode :
Anode where discharge of DC panel has little contribution to light output power.

Back ground luminance :
Referring to the panel luminance in off mode or black screen, in other words, luminance in the vicinity of
the screen.

10. Glossary

10-2 Samsung Electronics

Glossary

Barrier rib :
barriers that cross all the gaps of wafers dividing the cells in panel.

Black stripe :
black substance located in between the fluorescent areas to bring about improvement in contrast by reflec­tion ratio decline. Generally, this is striped.

Bright defect :
defects that occur when the image is rather bright than accurate.

Brightness(Reference : luminance) :
visible and subjective quality, for example, how bright matters look or how much visible rays are per­ceived.
Notice) Do not get confused luminance with brightness because those two are not the same. Brightness is
subjective while luminance is objective.

Brun in :
element's initial operation section that takes place until the element stabilizes or the initial expectancy expi­ration is detected.

Bus electrode :
aggregate of sustained electrodes that are bussed together.

Cathode electrode :
cathode electrified electrode that releases electrode from element. In AC plasma panel, polarity switches in
every half a cycle.

Cell :
capacity corresponding to each electric discharge. In general, it is defined by the shape of substrates and
electrodes but can be defined by partitions.

Cell gap :

measurements identifying the gaps between substrates.

Cell pitch :
measurement that identifies the cells from the surface of substrates. It varies depending on the direction of
rows and columns.

Charge transfer curves :
curves expressing the quantity of electric charge that is transferred, as the function of drive wave form
characteristics.(for example, voltage, time and others)

Color arrangement(in other words, sub-pixel arrangement) :
term expressing the location of one pixel consisted of sub color pixels.

Color coordinates, CIE 1931 :
Color image expressing method in color dimension, originated from CIE standard of 1931, expressed by X,
Y and Z. Among those three, Y element corresponds to luminous flux that is expressed as lumen while X
and Y are values that express red and purple element of luminous flux. Colors of matter are expressed as
color coordinates pair (x, y). Here x=X/(X+Y+Z), y=Y/(X+Y+Z).

Method for colors, known as (u, v), where image colors are expressed in more even color dimension.
Colors of matter are expressed as color coordinates pair (u, v). Here, u=4X/(X+15Y+3Z),
y=6Y/(X+15Y+3Z).

Samsung Electronics 10-3

Glossary

Color coordinates, CIE 1960 :
Method for colors, known as (u, v), where image colors are expressed in more even color dimension. colors
of matter are expressed as color coordinates pair(u, v). Here, u=4X(X+15Y+32), y=6Y/(X+15Y+32Z).

Color coordinates, CIE 1976

Method for colors, known as (u’, v’), where revised image colors are expressed in more even color dimen­sion. v’ is 1.5-fold of recommended v value of 1960. The color of matter is expressed as color coordinates
pair (u’, v’). Here, u’=4X/(X+15Y+3Z ) , v’= 9Y/( X+15Y+3Z ).

Color coordinates, CIE 1976 CIELUV and CIELAB :
Three dimensional parameters expressing with u’ and v’ including Ω√∞®º∫ against chromaticity and lumi­nance of standard white light in display. Among the parameters, only CIELUV gets to have proper color
space where additional two blend light appears in line segment. (refer to CIE Publication 15.2, Colorimetry
1st edition 1976, 2nd edition 1986)

Color depth :
The number of digital bit alocated to each major color.

Color gamut :
Physically realizable color space area.

Color reproducibility (Refer to color gamut) :
The expression of realizable colors limited by color information distinction or fluorescent substance
chromaticity.

Color temperature, correlated (symbol CCT) :
Seemingly temperature expressed with absolute temperature of black body radiation with the closest chro­maticity. This can be expressed as CCT, in the form of C. S. McCamy. CCT=437N3+3601n2+5517, n=(x-

0.3320)/(0.1858-y) and x, y=color coordinates of CIE 1931.

Columm electrode :
Vertically successive electrodes. It generally refers to data electrodes. When panel is installed along the pho­tograph, this can be arranged along the horizontal direction.

Concurrent driving method :
Driving method to disperse address pulse and scan pulse at equal distance.

Contrast ratio Columm electrode :
Ratio of white luminance to black luminance of image. This measurement has many parameters, so mea­surers are required to explain the consideration for measurement to make understood the meaning of the
measurement. The parameters of contrast ratio are as follows.

■ CA - ratio of center luminance in all white screen to center luminance of all black screen on the con­dition of light being spreading around.

■ CG - ratio of white luminance to black luminance in successive arrangement of white and black
lines at equal distance.

■ CL - ratio of white luminance to black luminance in white line against black screen of black line
against white screen.

■ CR - the ratio of white luminance to black luminance.

10-4 Samsung Electronics

Glossary

■ Cm - Michelson contrast or contrast modulation:
Here, Lw is the luminance of the color white while Lb is the luminance of the color black.

■ CT - Threshold contrast ratio: the minimum contrast ratio that is permissive, in general.

Chip on board(COB) :
PCB with IC on substrate.

Dark defect :
Defects in the brighter image realization than normal one.

Data electrode :
Electrodes allowed for controlling electric discharge by changing the cell’s state to switch on from off (and
vise versa) in AC plasma panel.

Data electrode driver :
Driving circuit to be attached to dada electrode.

Data write pulse :
Wave form for data electrode that switches from off to on.

Data erase pulse :
Wave form for data electrode that switches from on to off.

DC PDP :
Display panel whose plasma discharge is driven by direct current.

Decay time :
Time required for parameters to drop from certain level to another. It can be time necessary for dropping
from 90% to 10%, or to e-1 level of the initial value, or to certain irreversibility.

Dielectric layer :
Dielectric layer with larger sustained electric constant.

Discharge :

1. neutralization of electric charge (for example, voltage decrease of capacitor)

2. electric current flow in dielectric media such as gas.

Discharge current :
Discharge electric current.

Discharge electrode :
Another term for sustained electrode.

Discharge efficiency :
Another term for gloss efficiency

Discharge gap :
The gap among sustained electrodes in discharge space of three-electrode plasma panel.

Discharge slit :
(Refer to discharge gap)

Samsung Electronics 10-5

Glossary

Displacement current :
Electric current flow through capacitor that includes atomic rearrangement of discharge within electric mat­ter.

Display color number (color number possible to be displayed with other words.) :
displayable individual color ’s number.

Display Diagonal :
Diagonal size of display contour

Display efficiency :
The ratio of gloss output divided by the entire display power.

Display height :
Height of display contour

Display scan electrode :
(Refer to scan electrode)

Display width :
Width of display contour

Displayed color :
Refer to displayed color number.

Displayed color number :
Color numbers that can be made by display.

Dot (Refer to cell, pixel and subpixel) :
The term is hard to be defined because it is not clear if the term refers to full color pixel or subpixel. The
term is used when referring to color related elements that make up full color pixel or subpixel.

Dot pitch :
(Ambiguous expression. Refer to dot, cell pitch, pixel pitch and subpixel pitch.)

Driving waveform :
Expressing ∞ÊΩ√ change of driving signal voltage.

Driving scheme :
Expressing the thought applying driving voltage to display.

Effcacy :
Refer to luminous efficacy.

Energy recovery circuit :
Circuit degauss caught after reusing the power that drove AC plasma panel.

Erase :
Process where cells are erased from AC plasma panel.

Erase pulse :
Cell erasing waveform

10-6 Samsung Electronics

Glossary

Erase voltage :
Erase pulse voltage required for erasing cells from AC plasma panel.[symbol : Ve]

Evacuating (Interchangeable terms : evacuation, exhaust) :
Process where unwanted gas is rid from device.

Exhaust tubulation (Interchangeable terms: exhaust tube, exhaust pipe) :
Tube shaped hole in device connected to external vacuum pump, for controlling the initiation from device
during process. This is usually glass tube that prevents with flannelet after filling proper gas

Filling gas (Refer to gas mixture) :
After removing air, plasma panel goes through filling with proper electric and optical gas. Therefore, panel
gas composition is commonly called "filling gas".

Firing voltage :
Minimum voltage where triggers discharge in plasma device[symbol : Vf]

Flicker :
Fast and instant changes in luminance, perceivable in almost regular luminance experiment pattern.

Front substrate :

Substrates closer to the viewers, made of transparent material such as glass

Full color display :
Full color image (for example, image with more than 8 bit color tone) realizable display

Fpc(Flexible Printed Curcuit) :
Flexible substrates with circuited copper foil on polyimide

Gas mixing ratio (Interchangeable terms: gas mixture, gas composition) :
Gas composition within plasma device. It is usually expressed with ratio of the constituent gas.

Gas voltage (Interchangeable terms: gas break down voltage) :
Voltage where electrode and ion within plasma device can generate additional electrodes and ions.

-Thus, increasing the electric current within the device sharply. (break down or overflowing)

Glass substrate :
Substrates consisted of glass

Glow discharge :
Plasma discharge taking place under pressure of tens of millimeter. This is defined by ionization generated
by activated electrons in discharge space and electron release in cathode by ion bombardment.

Gradation :
Gradual change in characteristics such as luminance and chromaticity

Gray scale :
The range of luminance acquired when displayed from black to white.

High strain point glass :
Glass of which strain point (temperature with viscosity of 1014.5 poise) is relatively high

Image retention :
Continuous existence of image after the stimulation is removed.

Samsung Electronics 10-7

Glossary

Image sticking :
(Refer to Image retention.)

Interconnect pad groups :
A group of connection terminals that attach to individual connector. (also referred to as terminal block.)

Interconnect pad pitch :
Mutual measurements for individual of interconnect pad group.

Interconnect pad spacing :
The size of non-electric conductive area between individual terminal.

Inter-electrode gap :
In Three electrodes plasma panel, the measurement of sustained voltage separated from outside discharge
space.

Ion bombardment :
The bombardment of energetic ions in the surface of solid matter. The transfer of kinetic energy toward sur­face from ions can cause electron release, ion or neutron release and temperature change in surface.

Life time :
Time during device exerts its function. Commonly known as mean time failure (MTTF).

Low melting point glass :
Glass of which melting point (temperature with viscosity of 1014.5 poise) is relatively low.
Since glass is non- crystalline, the word melting is not appropriate, but it gets more fluid as it becomes hot.

Luminance :
Colloquial term for measurement of brightness of display.
It also refers to display related CIE Y constituent. it is expressed by cd/m2.

Luminance efficacy :
It refers to gloss output against the total display consumption power. It is calculated by the value
generated through dividing gloss output of ∞ÌªÛ white substance with gross consumption power. It is
expressed as lumen/watt.

Luminance efficiency :
Gloss output value according to consumption power increase, calculated by the value generated through
dividing gloss output of ∞ÌªÛ white substance with white screen power consumption increase against black
screen. It is expressed as lumen/watt.

Luminance loading :
Luminance decline that takes place when white square luminance increases into full size all white square.

Matrix(type) PDP :
Plasma display panel made up of matrix with rows and columns.

Matrix type :
Refer to matrix PDP
Maximum firing voltage :
Voltage value required for triggering discharge in all cells.

Maximum sustain voltage :
Maximum drive voltage required not to turn off the cells.