LM240WU8
Liquid Crystal Display
Product Specification
3-4. Signal timing specifications
This is the signal timing required at the input of the User connector. All of the interface signal
timing should be satisfied with the following specifications for it’s proper operation.
Table 6. TIMING TABLE (VESA COORDINATED VIDEO TIMING)
ITEM
Period
SYMBOL
tCLK
fCLK
tHP
Min
12.82
76
Typ
12.98
77
Max
13.16
78
Unit
ns
Note
Pixel frequency
: Typ. 154MHz
DCLK
Hsync
MHz
Frequency
Period
1036
16
1040
16
1044
16
tCLK
tWH
tVP
Width-Active
Period
1233
58.85
6
1235
59.95
6
1237
61
tHP
Hz
tHP
fV
Vsync Frequency
Width-Active
tWV
tHV
6
960
36
960
40
960
44
Horizontal Valid
tHBP
tHFP
-
Horizontal Back Porch
tCLK
20
24
28
Horizontal Front Porch
Horizontal Blank
Vertical Valid
76
80
84
tWH+ tHBP+ tHFP
Data
Enable
tVV
1200
25
1200
26
1200
27
tVBP
tVFP
-
Vertical Back Porch
Vertical Front Porch
Vertical Blank
tHP
2
3
4
33
35
37
tWV+ tVBP+ tVFP
Note: Hsync period and Hsync width-active should be even number times of tCLK. If the value is odd number
times of tCLK, display control signal can be asynchronous. In order to operate this LCM a Hsync,
Vsyn, and DE(data enable) signals should be used.
1. The performance of the electro-optical characteristics may be influenced by variance of the vertical
refresh rates.
2. Vsync and Hsync should be keep the above specification.
3. Hsync Period, Hsync Width, and Horizontal Back Porch should be any times of of character
number(8).
4. The polarity of Hsync, Vsync is not restricted.
Ver. 0.0
Apr, 07, 2011
14 / 32
LG [ LG SEMICON CO.,LTD. ]
