Copyright©2007 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
Only for training and service purposes
10. PC Video signal flow chart
*PC RGB signal flowchart
RGB Signal Input
LCD Panel
I
2
C Comm.
LVDS Signal
24bit
Digital signal
R/G/B
IC303
NVRAM
(PC EDID)
IC401
DTV Controller
IC302
Scaler
P503
LVDS Connector
P301
D-sub 15 Connector
The RGB signal outputted from the PC is received through the D-sub 15 pin connector of P301.
The PC reads the EDID information of IC303 through I
2
C line and outputs the best resolution supported by this board.
When the EDID information is not recorded in NVRAM(IC303) or when the EDID information cannot be read due to
communications line issue, basic resolution provided in PC is sent out as output.
The analog RGB signal entered through IC302 is converted to AD through the scaler(IC302) and sent to IC401 as
24 bit digital signal.
(The 24 bit signal is composed is wired OR with the 24 bit component outputted by the IC201(AD converter).)
The 24 bit signal received in DTV controller(IC401) is decoded and converted to LVDS to be sent to LCD panel
through P503.
