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EN 58
7.
Q552.1L LA
Notes to figure
7-21 TCON block
•
LVDS receiver: converts the data stream back into RGB
data and SYNC signals (Vsync, Hsync, Data Enable - DE)
•
ODC: Over Drive Circuit - to improve LC response
•
Data Path Block: the video RGB data input to data path
block is delayed to align the column driver start pulse with
the column driver data
+ 12V
7.9.1
TCON Programming
For LGD - TCONs, the EEPROM can be programmed via
2
ComPair (via I
C communication).
For Sharp - TCONs, the data can be flashed with a "SPI
Programmer" (via SPI communication). This device has to be
ordered separately via Philips.
7.9.2
TCON Alignment
The purpose of TCON alignment is to obtain equal voltages for
both positive and negative LC polarity. This is to avoid "flicker"
and "image sticking". For alignment, see
alignment.
2010-Dec-29
Circuit Descriptions
diagram:
D C /D C
C o n tro lle r
Figure 7-22 TCON DC/DC converters
6.3.3 TCON/VCOM
•
Timing Control Function: generates control signals to
column drivers and row drivers (Source Enable - SOE,
Gate Enable - GOE, Gate Start Pulse - GSP).
For an overview of the TCON DC/DC converters, refer to figure
7-22 TCON DC/DC
L G D
S H P
V G H
+2 8 V
+3 5 V
V G L
-6 V
V c c
+3 V 3
+3 V 3
V c c
+1 V 8
+1 V 2
Vre f
+1 6 V
+1 5 V 2
V d d
+1 6 V
+1 5 V 6
back to
div. table
converters.
W h ere U sed
To G a te D riv e rs (G a te
H ig h Vo lta g e )
To G a te D riv e rs (G a te
-6 V
L o w Vo lta g e )
Tim in g C o n tro lle r IC
S u p p ly Vo lta g e
Tim in g C o n tro lle r IC
S u p p ly Vo lta g e
G a m m a R e fe renc e
Vo lta g e
S o u rc e D riv e r S u p p ly
Vo lta g e
18770_240_100128.eps
100128
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