|
Active Area |
Area (L x H) of the LCD that has active segments. |
|
Annunciator |
A word or special symbol which is driven as a single
segment |
|
Array Process |
Method of manufacturing whereby displays are arranged in
rows and columns on a large laminate, and separated after they are
filled with LCD fluid. |
|
Backplane |
The common electrode connection. There can be multiple
backplanes in a multiplexed display. |
|
Blue Negative |
Display configuration of a backlit negative image STN display |
|
CCFL |
Cold Cathode Florescent Lamp |
|
COG |
Chip on Glass construction process |
|
COT |
Chip on Tab construction process |
|
Common Plane |
See Backplane |
|
Contact Ledge |
The area along the edge of the parts where electrical
connections are made. |
|
Contrast Ratio |
The ratio of the luminance between the dark and light
areas of the display. |
CSTN
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. |
|
Diffuser |
Translucent 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 Drive |
A method of driving a display whereby individual segments
are driven from separate edge connections. |
|
Elastomeric Connectors |
A thin conductive material used to make connections
between an LCD and a PC board. |
|
ELED |
Edge Lit LED backlight configuration |
|
ELP |
Electroluminescence Panel |
|
First Minimum |
An LCD construction technique where the cell geometry is
optimized for maximum contrast and viewing angle. The geometry is
different for each LCD fluid. |
|
Font |
The style of a letter or digit. |
FSTN
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. |
|
Ghosting |
A condition where segments which are in the "off"
condition become slightly visible. |
|
Heat Seal Cable |
A thin flexible cable used to connect the LCD to the PC
board which is bonded by heat cured adhesive at each end.. |
|
Image Area |
The total area bounded by the display characters |
|
Ink Overlay |
The process of applying opaque, colored inks to the
display to provide colors, or highlight certain areas of annunciators. |
|
LCD |
Liquid Crystal Display |
|
Liquid Crystal Fluid |
An organic material which has both liquid and crystalline
properties. |
|
LCD Module |
An 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 Image |
A display which has a dark background and lighter active
segments, i.e. clear characters on a black background |
|
Pixel |
An individual active segment |
|
Polarizer |
A stretched polymer which transmits light in only one
axis. A typical display has polarizers on the front and back. |
|
Positive Image |
A display which has a light background and darker active
segments, i.e. black characters on a silver background. |
|
Reflective |
A viewing mode which uses ambient or other front lighting
to provide the illumination for the display. |
|
Segment |
An 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 Drive |
See Direct Drive |
STN
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 |
|
Transflective |
A viewing mode which can use ambient light or
backlighting to provide the illumination for the display. |
|
Transmissive |
A viewing mode which cannot use any type of front
lighting to provide the illumination for the display, it therefore must
use a backlight |
TN
Twisted Nematic |
Twisted Nematic A type of display where the liquid
crystal fluid rotates the plane of polarization 90o. |
|
Viewing Area |
The 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 Angle |
The 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. |
