KF2004-GR40A
Printheads
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Compact medium speed thick film
thermal printhead (8dots / mm)
KF2004-GR40A
The KF2004-GR40A is ideal for applications that require compact, lightweight thermal printheads, such as POS and label
printer applications. The 2-, 3-, and 4-inch sizes have a resolution of 203dpi. This series is suitable for a wide range of
applications.
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Applications
POS printers
Label printers
Receipt printers
General purpose compact printers
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Features
1) Both ROHM's advanced LSI technology and proprietary partial glaze are used to realize higher printing efficiency. With
a high print speed of 100mm/s, this series is also suitable for thermal transfer printing.
2) Besides the fact that harness-type direct connectors at either end allow wring to be fitted as convenient, the thermal
printheads can be applied directly to the substrate without a heat sink. Both these features give engineers greater
freedom when designing the printer mechanism.
3) One rank resistance value of 800
3% eliminates the inconvenience of rank selection.
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External dimensions (Units : mm)
5.85
Max.
14.0
Max. 1.7
119 (HEATSINK WIDTH)
108 (EFFECTIVE PRINT WIDTH)
DOT #864
DOT #1
15.1
2.6
16
No.9
No.1
No.9
No.1
CONNECTOR B
CONNECTOR A
4.6
5
109
2-M3
KF2004-GR40A
Printheads
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Timing chart
C L O C K ( C L K )
D A T A I N ( D I )
D A T A O U T ( D O )
L A T C H ( L A T )
S T R O B E ( S T B )
D R I V E R O U T
t w C L K
t s e t u p D I
t h o l d D I
t d D O
t s e t u p L A T
t w L A T t s e t u p S T B
t d o
t d o
t h o l d L A T
" H i g h " : B L A C K
" L o w " : W H I T E
" H i g h " : B L A C K
" L o w " : W H I T E
" H i g h " : H O L D
" L o w " : T H R O U G H
Fig.2
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Characteristics
Effective printing width
Dot pitch
Total dot number
Average resistance value
Applied voltage
Applied power
Print cycle
Pulse width
Maximum number of dots energized simultaneously
Maximum clock frequency
Maximum roller diameter
Running life / pulse life
Operating temperature
Parameter
Rave
V
H
P
O
SLT
T
ON
108.0
0.125
864
800
24.0
0.49
1.25
0.38
432
4
14.0
50/5
10
7
5~45
mm
mm
dots
V
W/dot
ms
ms
dots
MHz
mm
km/pulses
C
Symbol
Typical
Unit
-
-
-
-
-
-
-
-
KF2004-GR40A
Printheads
4/4
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Electrical characteristic curves
Paper : KF50-HDA (OJI)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
1
2
3
4
5
SCANNING LINE TIME (
ms/line)
ENERGY (
mJ/dot)
Fig.3 Adaptive speed chart
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0.00
0.05
0.10
0.15
0.20
0.25
0.30
ENERGY (
mJ/dot)
OPTICAL DENSITY
SLT : 1.25ms/line
Fig.4 Representative density curve
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
1
2
3
4
5
SCANNING LINE TIME (
ms/line)
ENERGY (
mJ/dot)
Fig.5 Maximum energy curve
0
20
40
60
80
100
120
140
160
180
-
20
-
10
10
30
50
70
0
20
40
60
TEMPERATURE : (
C)
RESISTANCE : (k
)
Fig.6 Thermistor curve
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