HD66789 Datasheet, PDF (133/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
Preliminary
Interlaced Drive
The HD66789 supports interlaced drive, which divides one frame into n fields and then drives to prevent
flickers.
To determine the number of fields (n: value set in the FLD bits), check the display quality on the actual
liquid crystal panel. The following table shows the gate selection for each number of fields, 1 to 3. The
figure illustrates the output waveforms of the 3-field interlaced drive.
Gate selection
GS = 0
FLD1-0
Gate
G1
G2
G3
G4
G5
G6
G7
G8
G9
•
•
•
G237
G238
G239
G240
01
Field -
1
OO
O
O
OO
O
O
OO
O
O
•
•
•
•
•
•
O
OO
O
O
11
2
3
O
O
O
O
O
O
•
•
•
•
•
•
O
O
O
GS = 1
FLD1-0
Gate
G240
G239
G238
G237
G236
G235
G234
G233
G232
•
•
•
G4
G3
G2
G1
01
Field -
1
11
2
3
OO
O
O
O
O
OO
O
O
O
O
OO
O
O
O
O
•
•
•
•
•
•
•
•
•
•
•
•
O
O
OO
O
O
O
O
Rev.0.12, May 09 2003, page 133 of 156