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LCD Glossary

Blaze Display Technology Co., Ltd. | Updated: Oct 28, 2015

【R&D Department of Blaze Display】


Active AreaArea (L x H) of the LCD that has active segments.
AnnunciatorA word or special symbol which is driven as a single segment
Array ProcessMethod of manufacturing whereby displays are arranged in rows and columns on a large laminate, and separated after they are filled with LCD fluid.
BackplaneThe common electrode connection. There can be multiple backplanes in a multiplexed display.
Blue NegativeDisplay configuration of a backlit negative image STN display
CCFLCold Cathode Florescent Lamp
COGChip on Glass construction process
COTChip on Tab construction process
Common PlaneSee Backplane
Contact LedgeThe area along the edge of the parts where electrical connections are made.
Contrast RatioThe ratio of the luminance between the dark and light areas of the display.
Color STN
Color STN Technology. Each pixel of a CSTN display is actually 3 separate colored pixels of Red / Green / Blue. Each of those colors are controlled individually by the graphic controller chip. So in actually; a 320 by 240 pixel CSTN display actually contains 960 by 240 individually colored pixels
Dual in Line Pins (DIL)Two rows of pins attached along parallel sides of a display.
DiffuserTranslucent material used for light diffusion placed between backlight lighting sources and the back side of an LCD. This material will create a more uniform backlight for an LCD from several unique sources of light.
Direct DriveA method of driving a display whereby individual segments are driven from separate edge connections.
Elastomeric ConnectorsA thin conductive material used to make connections between an LCD and a PC board.
ELEDEdge Lit LED backlight configuration
ELPElectroluminescence Panel
First MinimumAn LCD construction technique where the cell geometry is optimized for maximum contrast and viewing angle. The geometry is different for each LCD fluid.
FontThe style of a letter or digit.
Film compensated STN
STN Technology with the addition of a retardation film to the display that compensates for the color added by the birefringence effect. This allows a black and white display to be produced and provides for a higher contrast and wider viewing angle.
GhostingA condition where segments which are in the "off" condition become slightly visible.
Heat Seal CableA thin flexible cable used to connect the LCD to the PC board which is bonded by heat cured adhesive at each end..
Image AreaThe total area bounded by the display characters
Ink OverlayThe process of applying opaque, colored inks to the display to provide colors, or highlight certain areas of annunciators.
LCDLiquid Crystal Display
Liquid Crystal FluidAn organic material which has both liquid and crystalline properties.
LCD ModuleAn LCD which includes a PCB, driver electronics, bezel, and possibly a backlight.
Multiplex (Mux)A method of driving a display whereby multiple segments are driven from the same edge connection.
Negative ImageA display which has a dark background and lighter active segments, i.e. clear characters on a black background
PixelAn individual active segment
PolarizerA stretched polymer which transmits light in only one axis. A typical display has polarizers on the front and back.
Positive ImageA display which has a light background and darker active segments, i.e. black characters on a silver background.
ReflectiveA viewing mode which uses ambient or other front lighting to provide the illumination for the display.
SegmentAn active area within the display which can be turned on and off. This can be a single segment of a 7-segment character, an annunciator, or a pixel in a dot matrix array.
Static DriveSee Direct Drive
Super Twisted Nematic
A type of display which uses fluids which "twist" greater than 90o. An STN display has improved viewing angles and contrast at high multiplex rates
TransflectiveA viewing mode which can use ambient light or backlighting to provide the illumination for the display.
TransmissiveA viewing mode which cannot use any type of front lighting to provide the illumination for the display, it therefore must use a backlight
Twisted Nematic
Twisted Nematic A type of display where the liquid crystal fluid rotates the plane of polarization 90o.
Viewing AreaThe area of a display which is visible through a bezel or cut-out in an instrument. This area is made up of the "Active Area" and the boarder around the active area.
Viewing AngleThe preferred angle of viewing a display, usually described in comparison to a clock face, i.e. 12 o´clock for above the normal, or 6 o´clock for below the normal.

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