Title:
Engineering Specification: 12.1-inch AMLCD Monitor
Page
6 of 27
Document Number
: 023-0284-00
Revision:
A
Magnification or reduction of specified video resolutions to match the native LCD Panel’s resolution
incorporates scaling algorithms minimizing aliasing and image distortion. The LCD Controller Board
includes the following characteristics:
•
Per pixel scaleable filters providing text sharpening and graphics smoothing for improved image
quality.
•
Color depth enhancement by performing spatial-temporal dithering reducing visual artifacts.
2.8 Grounding
Two (2) types of ground are provided:
Chassis
and
Signal
ground.
2.8.1 Chassis Ground
The chassis ground is a conductor that is grounded to the earth within user circuitry. It is
not used for current carrying purposes. It is used only for non-current carrying purposes
such as electromagnetic compatibility (EMC).
2.8.2 Signal Ground
Signal ground is electrically connected to chassis ground via the LCD Panel. However,
there are no DC currents carried through this interconnect.
2.9 External And Internal Controls
A single external “Video Gain” control compensates for the white state (full white) video signal level
range specified in Section 4.2.1 in achieving sixty-four (64) shades of gray.
External horizontal and vertical image positioning control(s) are provided to accommodate for the
undefined delay between sync and video data edge referred to as Front Porch / Back Porch in Figure 9.
