STV2050A STMicroelectronics, STV2050A Datasheet - Page 45

• Manufacturer Part Number: STV2050A
• Description: IC DGTL CONVERGENCE PROC 80-PQFP
• Manufacturer: STMicroelectronics
• Type: Videor

Specifications of STV2050A

• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 80-MQFP, 80-PQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9 CONVERGENCE
The STV2050A generates convergence values from parameters which are stored in the em-
bedded RAM after having being loaded down from the EEPROM. These parameters can be:
– Common for the entire screen area for each color. They are called “common values”. They
They are used mainly:
– To pre-adjust the geometry and convergence, as well as to reduce the necessary action on
– To compensate the tolerances of the offset and gain for the external components.
– Dedicated to each value of the net of 16 points horizontally by 13 points horizontally. They
– Added as an offset frame by frame (interlacing),
– Forced to special values in alignment modes or during startup and security modes.
Figure 26. Convergence Values Computation Path
9.1 GLOBAL ADJUSTMENTS - COMMON PARAMETERS
Three sets of parameters are available for each red, green and blue channel for each hori-
zontal and vertical direction:
– Position offset,
– Gain correction,
– Offset canceller.
are used for global adjustments, as they have the same effect on all the convergence values
of the same color and in the same direction (horizontally or vertically).
each separate point,
are called “dynamic values”,
Dynamic
values
(" Static" )
Position
E1 , E2
Interlace
Offset
DA
Calibration
DC, DD
Common values
Gain correction
fine : D0, D1
coarse : E0
Measuring
Field offset
canceller
D2, D3
E8
STV2050A - CONVERGENCE
to
convergence
outputs
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