hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 67
hd66765
Manufacturer Part Number
hd66765
Description
396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66765.pdf
(71 pages)
- Current page: 67 of 71
- Download datasheet (696Kb)
n-raster-row Reversed AC Drive
The HD66765 supports not only the LCD reversed AC drive in a one-frame unit (B-pattern waveform)
but also the n-raster-row reversed AC drive which alternates in an n-raster-row unit from one to 64 raster-
rows (C-pattern waveform). When a problem affecting display quality occurs, such as crosstalk at high-
duty driving of more than 1/64 duty, the n-raster-row reversed AC drive (C-pattern waveform) can
improve the quality.
Determine the number of raster-rows n (NW bit set value + 1) for alternating after confirmation of the
display quality with the actual LCD panel. However, if the number of AC raster-rows is reduced, the
LCD alternating frequency becomes high. Because of this, the charge or discharge current is increased in
the LCD cells.
B-pat t ern
wa veform drive
• 1/80 duty
C- pat tern
wav eform drive
• 1/80 duty
• 11-raster-row
• Without EORs
C- pat tern
wav eform drive
• 1/80 duty
• 11-rast er-row
• With EORs
reversal
revers al
Note: Specify the numb er of AC drive raster-rows and the necess ity of EOR so that the DC bias is not generated f
the liquid crys tal.
Figure 50 Example of an AC Signal under n-raster-row Reversed AC Drive
1 2 3 4 5 6 7 8 9 10 11 12 13
1 frame
67
79 80 1 2 3 4 5 6 7 8 9 10 111213
1 frame
HD66765
79 80 1 2 3
Related parts for hd66765
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Hd/sd Multi Format Video Encoder With 3ch Dac
Manufacturer:
AKM Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas Starter Kit for RX210
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas StarterKit for RX630
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit+ for RX63N
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
FLASH PROGRAMMER FOR RENESAS MICROCONTROLLERS
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet: