CXA3572 Sony Corporation, CXA3572 Datasheet - Page 24

• Manufacturer Part Number: CXA3572
• Description: Driver/Timing Generator for Color LCD Panels
• Manufacturer: Sony Corporation

• Bright circuit
• White balance adjustment circuit
• Output circuit
This is used to adjust the black-black amplitude of polarity-inverted RGB output signals. It is not interlinked
with the transition points.
This is used to adjust the white balance. The black level is adjusted by SUB-BRIGHT, and the black-white
amplitude is adjusted by SUB-CONTRAST.
RGB output (Pins 8, 10, and 12) signals are inverted each horizontal line by the FRP pulse (internal pulse)
supplied from the TG block as shown in the figure below. Feedback is applied so that the center voltage
(SIG.C) of the output signal matches the reference voltage (Vcc2 + GND2)/2 (or the voltage input to SIG.C
(Pin 16)). In addition, the white level output is clipped at the limiter operation point that is set by the serial
communication WHITE-LIMITER, and the black level output is clipped at the limiter operation point that is set
by the serial communication BLACK-LIMITER.
The output PSIG signal level is normally adjusted by PSIG-BRIGHT, but during black frame display the level
is specified by the BLACK-LIMITER level at some timings. In addition, the RGB output also simultaneously
goes to BLACK-LIMITER level output.
Black frame display signal
(internal)
1H inverted signal
(internal)
PSIG OUT
RGB OUT
RGB IN
Set by PSIG-BRIGHT
Set by BLACK-LIMITER
– 24 –
Set by BLACK-LIMITER
BLACK-LIMITER
SIG.C
BLACK-LIMITER
BLACK-LIMITER
WHITE-LIMITER
SIG.C
WHITE-LIMITER
BLACK-LIMITER
CXA3572R