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ACTIVE AREA/EFFECTIVE AREA
In the viewing area of the LCD glass the dimensions of the perimeter of the conductive area.
BEZEL
A frame of plastic or metal fitting over the LCD glass
CELL GAP
The space containing liquid crystal fluid between the two pieces of glass.
CHIP-ON-BOARD (COB)
The LCD driver chip is mounted directly on the PCB with wires used to connect it to other circuits.
CHIP-ON-GLASS
A technology that mounts the LCD driver chip to the contact edge of the LCD glass.
CHIP-ON-FLEX
The LCD driver chip is mounted to a flexible connector.
CONTRAST RATIO
The difference in luminance between the unselected area and the selected area.
DIRECT/STATIC DRIVE
The method in which each conductive lead on the contact edge connects to one segment or annunciator.
DOT/PIXEL
An active element that forms a character or symbol.
DOT MATRIX
A group of dots/pixels forming a character or symbol. Typical 5 accross by 7 down.
ELASTOMER CONNECTOR
A silicone rubber strip made up of conductive and non-conductive material.
HAZE
The percent of transmitted light that is scattered more than 2.5° from the direction of the incident beam.
Materials with haze values greater than 30% are considered diffusing.
HEAT SEAL
A flexible adhesive connector bonded by heat to the contact edge of the glass.
INVERTER, DC to AC
Converts DC to AC at a high frequency, used with electroluminescent lamps (EL).
LIQUID CRYSTAL FLUID
Consists of bipolar molecules which can twist polarized light when in the OFF state.
MODULE
LCD glass connected to a PCB with drivers on board.
MULTIPLEX
Using multiple backplanes in order to reduce the number of connections between the LCD and the drivers.
OLED
OLED (organic light-emitting diodes) based on the use of organic polymer material as the semiconductor material in light-emitting diodes (LEDs).
PITCH
The center dimension of adjacent conductive traces, dots, or connector holes.
PIXEL
The same as "dot"
RCF FILM
REFLECTIVE
A smooth reflective layer bonded to the rear polarizer that reflects incoming ambient light.
SEGMENT
An active element of a digit, usually 7 segments for numeric and 14 segments for alpha/numeric digits.
STATIC DRIVE
Same as "direct drive."
TFT
Thin-Film Transistor technology is a liquid crystal display that has a transistor for each pixel.
THRESHOLD VOLTAGE
TRANSFLECTIVE
A reflective layer bonded to the rear polarizer that can reflect some ambient light and also lets the backligh pass through.
TRANSMISSIVE
An LCD which does not have a reflector or transflector.
TRANSMITTANCE
The percent of incident light that is able to pass through a material. The higher the transmittance value, the more transparent a material is.
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.
VIEWING ANGLE
A cone perpendicular to the LCD in which minimum contrast can be seen.
VIEWING AREA
The dimensions measured from the inside perimeter of the LCD bezel or LCD glass epoxy seal.
ZEBRA(R) CONNECTOR a trademark of Fujipoly America Corp for a brand of elastomer connector.
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