hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 111

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

HD66789
J-Correction Function
The HD66789 incorporates J-correction function to simultaneously display 262,144 colors, by which 8-
level grayscale is determined by the gradient-adjustment and fine-adjustment registers. Select either
positive or negative polarity of the registers according to the characteristics of a liquid crystal panel.
Rev.0.12, May 09 2003, page 111 of 156
Negative
Polarity
Register
VRP
VRN
Positive
Polarity
Register
14
14
VRP
VRP
VRN
VRN
Display
data
03
13
03
13
PKP
PKP
PKP
PKP
PKP
PKP
PRP
PRP
VRP
VRP
PKN
PKN
PKN
PKN
PKN
PKN
PRN
PRN
VRN
VRN
02
12
22
32
42
52
02
12
02
12
02
12
22
32
42
52
02
12
02
12
PKP
PKP
PKP
PKP
PKP
PKP
PRP
PRP
VRP
VRP
PKN
PKN
PKN
PKN
PKN
PKN
PRN
PRN
VRN
VRN
MSB
R
01
11
21
31
41
51
01
11
01
11
01
11
21
31
41
51
01
11
01
11
5
PKP
PKP
PKP
PKP
PKP
PKP
PRP
PRP
VRP
VRP
PKN
PKN
PKN
PKN
PKN
PKN
PRN
PRN
VRN
VRN
R
4
00
10
20
30
40
50
00
10
00
10
00
10
20
30
40
50
00
10
00
10
R
3
8
R
2
Grayscale control
R
1
32
R
0
V0
V1
V31
G
Graphics RAM(GRAM)
5
32-level grayscale
control
G
FRC control
4
LCD driver
R G B
G
3
6
<R>
G
2
G
1
32-level grayscale
control
FRC control
LCD
G
LCD driver
0
B
6
<G>
5
B
4
32-level grayscale
control
B
FRC control
3
LCD driver
B
2
6
<B>
B
1
Preliminary
LSB
B
0