ACTIVE AREA/EFFECTIVE AREA
In the viewing area of the LCD glass, the dimensions of the perimeter of the conductive area. LCD size is determined by the diagonal measurement of the viewing area.
AMLCD See TFT
Conductive spheres contained within a thermoplastic non conducting adhesive, which when heated and placed under pressure provide a selective conductive path for electronic driver chips attached with the adhesive to ITO traces on glass.
A word, phrase, or symbol; an active element.
A frame of plastic or metal, fitting over the LCD glass, to protect the edges of the glass
Cold Cathode Fluorescent Lamp [or Tube] used to provide a light source which is modified by the display and presents the graphic to the human eye.
The space containing liquid crystal fluid between the two pieces of glass.
The LCD driver wafer is mounted on the PCB with gold wires used to connect it to other circuits. It is covered with epoxy.
A new technology that mounts the LCD driver to the contact edge of the LCD glass.
The contact edge of the LCD glass is mounted to a flex connector that incorporates an LCD driver.
The superimposition of the conductive pattern from one piece of glass to the second piece. The duty ratio is determined by the number of backplanes.
COLD CATHODE BACKLIGHT
In medium to large LCD graphic modules, a type of fluorescent backlighting or edge lighting.
The area of the LCD with conductive leads/traces where electrical connection is made by use of a connector.
The difference in luminance between the unselected area and the selected area.
Dots used to indicate the location of the next character or symbol to be entered.
Two parallel rows of connection holes on a PCB. Also, the type of connector used with this array.
The method in which each conductive lead on the contact edge connects to one segment or annunciator.
An active element that forms a character or symbol when combined in a matrix.
A group of dots/pixels forming a character or symbol, usually five dots across and seven dots down.
Double Super Twist Nematic, utilizing a fluid composed of molecules that behave like crystals.
1/N when N is equal to the number of segments selected by one complete cycle.
EFFECTIVE AREA see ACTIVE AREA
A silicone rubber strip made up of sequentially spaced conductive and non-conductive material. An older method of connection for LCD modules.
A dead short is created when excess DC voltage is applied to an LCD. Conductive particles from one piece of glass are transferred through the liquid crystal fluid and deposited on the conductive surface of the opposite piece of glass.
ENVELOPE See CELL GAP
The space left between the epoxy seals on one end of the LCD glass after assembly. This space, used to fill the glass with the liquid crystal fluid, is noted by a mound of epoxy.
The active pattern containing the information to be displayed in the LCD glass.
FPD, LCD, SCREEN
Used interchangeably, Flat Panel Display, Liquid Crystal Display, refers to the graphic monitor used typically in Laptop Computers.
A phenomenon occurring when voltage from an energized element leaks to an adjacent OFF element and turns the adjacent element partially ON. Typically seen on STN and DSTN screens.
A flexible adhesive connector bonded by heat to the contact edge of the glass.
Consisting of silver impregnated epoxy, it connects the pattern piece of glass to each backplane.
INVERTER, DC to AC
Converts DC to AC at a high frequency, and powers CCFT lamps.
Isopropyl Alcohol, typically used at 90% for pre inspection cleaning of the Screen, and post repair prior to packaging.
The point where the fluid heats or cools to where it is no longer in the Twisted Nematic state. Since the molecules can no longer twist light, all incoming light is absorbed.
Indium Tin Oxide refers to the typical metallization sputtered on to the glass panel to provide electrically conductive paths.
The conductive traces on the contact edge of the glass.
LCD SIZE See ACTIVE AREA/EFFECTIVE AREA
LIQUID CRYSTAL FLUID
Having properties of both a solid and a liquid, it consists of rod-shaped bipolar molecules which are capable of twisting polarized light when in the OFF state.
An LCD glass connected to a PCB with drivers on board. It may also have controllers, temperature compensation circuits, or other features.
Using multiple backplanes in order to reduce the number of connections between the LCD and the drivers.
Plasma Display Panel, earlier technology panel, using gas excitation to produce visible display.
The center dimension of adjacent conductive traces, dots, or connector holes.
PIXEL see DOT
A smooth silver piece of aluminum foil, bonded to the rear polarizer, that reflects incoming ambient light. Backlighting cannot be used with a reflective LCD.
RMS. voltage required to turn fluid to 90% on.
An active element of a digit, usually 7 segments for numeric and 14 segments for alpha/numeric digits.
An LCD module that has a single row of connection holes, and an LCD glass with a single contact edge.
STATIC DRIVE see DIRECT DRIVE
Super Twist Nematic, utilizing a fluid composed of molecules that behave like crystals.
Tape Automated Bonding refers to the method used to package the chip, hence the vernacular for the chip assembly.
Thin Film Transistor, where each sub-pixel in this display has its own active controlling transistor.
RMS. voltage required to turn fluid to 10% on.
A type of backing, bonded to the rear polarizer, which enables light to pass through the back as well as reflecting light from the front.
An LCD which does not have a reflector or transflector laminated to the rear polarizer. A backlight must be used with this type of LCD configuration.
TWISTED NEMATIC (TN)
A type of liquid crystal where the alignment surface, and therefore the liquid crystal molecules, is oriented 90 degrees from each surface of glass.
Z AXIS ADHESIVE see ANISOTROPIC ADHESIVE
Z AXIS CONNECTOR see ELASTOMERIC CONNECTOR.
ZEBRA CONNECTOR see ELASTOMERIC CONNECTOR
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