Vizio Gallevia GV46LHDTV10A, Service Manual

Page: 47 / 180

CONFIDENTIAL – DO NOT COPY Page 8- 16
File No. SG-0199
The benefit of dithering is that the eye tends to average neighboring pixels and a smooth
image free of contours is perceived. Dithering works by spreading the quantization error over
neighboring pixels both spatially and temporally. Two dithering algorithms are available:
random or ordered dithering. Ordered dithering is recommended when driving a 6-bit panel.
All gray scales are available on the panel output whether using 8-bit panel (dithering from 10
to 8 bits per pixel) or using 6-bit panel (dithering from 10 down to 6 bits per pixel).
Dual Channel LVDS Transmitter
An integrated LVDS transmitter with programmable input to output configuration is provided to
enable drive of all known panels. The LVDS transmitter can support the following:
‹
Single pixel mode 24-bit panel mapping to the LVDS channels
‹ 18-bit panel mapping to the LVDS channels
‹
Programmable channel swapping (the clocks are fixed)
‹
Programmable channel polarity swapping
‹ Supports up to SXGA 75Hz output
On-Chip Microcontroller (OCM)
The on-chip microcontroller (OCM) is a 16-bit x86 100MHz processor capable of acting as
either the overall system controller or a slave controller, receiving commands from an external
controller.
The OCM executes firmware running from external ROM, as well as driver-level (or
Application Programming Interface – API) functions residing in internal ROM. A parallel port
with separate address and data busses is available for this purpose.
This port connects directly to standard, commercially available ROM or programmable FLASH
ROM devices. A serial FLASH ROM may be used with the serial peripheral interface (SPI)
and cache controller inside the Genesis device. Both firmware and OSD content must be
compiled into a HEX file and then loaded onto the external ROM.
The OSD content is generated using Genesis Workbench. Genesis Workbench is a GUI
based tool for defining OSD menus, navigation, and functionality.