HD66520 Datasheet, PDF (12/45 Pages) Hitachi Semiconductor – 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM

HD66520T
Applied voltage pattern
1st frame
White (0, 0)
2nd frame
3rd frame
Light gray
(0, 1)
Dark gray
(1, 0)
Black (1, 1)
V1 (M = 1)
V2 (M = 0)
V3 (M = 1)
V4 (M = 0)
Brightness
Effective voltage
(Vrm0)
(Vrm1)
(Vrm2)
(Vrm3)
White
Light gray
Dark gray
Black
Vrm0 Vrm1 Vrm2 Vrm3
Effective voltage
Effective voltage and Brightness
Note: Black is shown when the LCD select high-level power supply V1 (M = 1) and LCD select
low-level power V2 (M = 0) are selected. White is shown when the LCD non-select
high-level power supply V3 (M = 1) and LCD non-select low-level power supply V4 (M = 0)
are selected.
Figure 7 Effective Voltage Values vs. Brightness
1025