HT1647_05 Просмотр технического описания (PDF) - Holtek Semiconductor
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HT1647_05 Datasheet PDF : 17 Pages
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HT1647
Relationship Table between PWM Data and Gray Scale
V a lu e
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
5 b its P W M
B4 B3 B2
000
000
000
000
001
001
001
001
010
010
010
010
011
011
011
011
100
100
100
100
101
101
101
101
110
d a ta
B1 B0
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
(O
PW
Nw
M
id th )
G
ra y
S c a le
0 (0 /2 3 )
1 /2 3
2 /2 3
3 /2 3
4 /2 3
5 /2 3
6 /2 3
7 /2 3
8 /2 3
9 /2 3
1 0 /2 3
1 1 /2 3
1 2 /2 3
1 3 /2 3
1 4 /2 3
1 5 /2 3
1 6 /2 3
1 7 /2 3
1 8 /2 3
1 9 /2 3
2 0 /2 3
2 1 /2 3
2 2 /2 3
1 (2 3 /2 3 )
1 (2 4 /2 3 )
31 1 1 1 1 1
1 (3 1 /2 3 )
Table 1: FRAME 89Hz Mode
V a lu e
0
1
2
3
4
5
6
7
8
9
10
11
12
13
5 b its P W M
B4 B3 B2
000
000
000
000
001
001
001
001
010
010
010
010
011
011
d a ta
B1 B0
00
01
10
11
00
01
10
11
00
01
10
11
00
01
(O
PW
Nw
M
id th )
G
ra y
S c a le
0 (0 /1 2 )
1 /1 2
2 /1 2
3 /1 2
4 /1 2
5 /1 2
6 /1 2
7 /1 2
8 /1 2
9 /1 2
1 0 /1 2
1 1 /1 2
1 (1 2 /1 2 )
1 (1 3 /1 2 )
31
11111
1 (3 1 /1 2 )
Table 2: FRAME 170Hz Mode
Note: The varied PWM data displays various gray scale
in TN-type, STN-type LCDs.
The color display derives from ECB-type LCD¢s
specification.
Name
GRS LEVEL 1
GRS LEVEL 2
GRS LEVEL 3
GRS LEVEL 4
Command Code
X100-001 B4-B3 B2 B1 B0-XXXX
X100-010 B4-B3 B2 B1 B0-XXXX
X100-011 B4-B3 B2 B1 B0-XXXX
X100-100 B4-B3 B2 B1 B0-XXXX
Function
Set PWM data in gray scale level 1
Set PWM data in gray scale level 2
Set PWM data in gray scale level 3
Set PWM data in gray scale level 4
Four Kinds of Gray Scale Level Command Code
16
1
2
V LC D
V1
V2
COM
V3
V4
V SS
W
16
1
2
W'
V LC D
V1
V2
SEG
V3
V4
V SS
W'
W
V LC D
3 /5 V L C D
C O M ~SEG
1 /5 V L C D
-1 /5 V L C D
-3 /5 V L C D
-V LC D
ON
O FF
ON
1 fra m e
N o te : " W '" R e a l a c tiv e s e g m e n t s ig n a l w id th ( a d ju s ta b le w id th b y P W M d a ta )
" W " M a x . a c tiv e s e g m e n t s ig n a l w id th
P W M ( O N w id th ) : W '/W , 0 £ W '/W £ 1 ( r e fe r to ta b le 1 & ta b e l 2 )
Example of Waveform (B Type) in 1/5 Bias, 1/16 Duty Cycle Drive
Rev. 1.30
9
November 10, 2005
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