LiteMax LD1001

LITEMAX
PRODUCT SPECIFICATION
FOR
MODEL LD1745
17" SUNLIGHT READABLE LCD
Rev:
Date:
A0
Oct 1, 2003
LITEMAX Electronics Inc.
4F, No.131-3, Lane235, Bau-chiau Rd., Shin-dian City, Taipei
County, Taiwan R.O.C.
Tel : 886-2-8919-1858
Fax: 886-2-8919-1300
Homepage: http://www.litemax.com.tw
LITEMAX
LD1745 Rev: A0
TABLE OF CONTENTS
Introduction and Overview.................................................................................................................3
Sunlight Readable TFT LCD Characteristics…..………………………………………………………...3
Function Block Diagram……………………………………………………………………………………..4
Functions and Environments……………………………………………………………………………….4
Reliability and Lifetime………………………………………………………………………………………5
Electrical Characteristics……………………………………………………………………………………6
Signal and Power Interface………………………………………………………………………………….7
Control Board ( LM1513_CB)…………………………………………………………………...15
Mechanical Outline for LITEMAX’s AU1745 Panel Drawing………………………………………….29
LITEMAX’s LI3601 Inverter…………………………………………………………………………………31
Precautions……………………………………………………………………………………………………34
Revision History……………………………………………………………………………………………...36
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LITEMAX
LD1745 Rev: A0
Introduction and Overview
This is a product specification that specifies form, fit, and function of the 17”LCD and its options. The
LD1745 is a product of high bright LCD monitors intended for use in a variety of industrial and
commercial applications. Some of these applications include automatic teller machines (ATMs), fuel
dispensing systems, ticketing and information kiosks, and intelligent vending machines. The LCD
panel for LD1745 has a particularly fast response time of 16ms and consequently very well suited for
video applications.
The LD1745 is a 17” active matrix TFT LCD with a native resolution of SXGA (1280X1024). It has a
typical luminance of 1000 nits with a +12VDC input. The video interface is through a standard 15 pin
analog input with an integrated On-Screen Display(OSD). The sheet-metal external housing is
intended for industrial applications where the product is integrated into a larger host system.
Commercial applications would most likely require an additional external façade. This product
includes packaging designed to withstand standard shipping conditions.
The option available is a power supply with US or EU cord options and a VGA cable. The power
supply is appropriately rated and tested for this displays.
Characteristics
ITEMS
SPECIFICATIONS
17” Sunlight Readable TFT-LCD
Display Area
Diagonal size of display
Drive system
Display Colors
Resolution ( Number of pixels )
Pixel Arrangement
Dot Pitch
Pixel Pitch
Module size
Weight
Contrast ratio
Viewing angle
Designed viewing direction
Color gamut
Response Time
Luminance
Signal system
LITEMAX Confidential
337.92 (H) x 270.34 (V) mm
17 inches
a-Si TFT active matrix
262 k
1280 (H) x 1024 (V) pixel
R.G.B Vertical Stripe
0.088 (H) x 0.088 (V) (mm)
0.264 (H) x 0.264 (V) (mm)
436(H) x375 (V) x 54.1 (D) mm
4.86 kg (typ.)
500:1 (typ.)
At the contrast ratio 10:1
Horizontal: Left side 80° (typ.), Right side 80° (typ.)
Vertical: Up side 75° (typ.), Down side 75° (typ.)
Optimum grayscale (γ=2.2): perpendicular
At LCD panel center / 60% (typ.)[against NTSC color space]
16ms
1000 cd/m2
Parallel 8-bit interface (2 port)
[8-bit digital signals for data of RGB colors,
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LITEMAX
LD1745 Rev: A0
Dot clock (CLK), Data enable (DE)]
LCD panel signal processing board: 5V / Backlight inverter: 12V
Direct light type: 10 cold cathode fluorescent lamps
[Replaceable parts :] Backlight unit : AU1745
Inverter : LI3601(Rev.2)
65W
Supply voltage
Backlight
Power consumption
Function Block Diagram
↑
10 CCFL
↑
Functions and Environments
Item
Input Voltage
Input Current
Power
White Luminance
Luminance Uniformity
Contrast Ratio
Viewing Angle
Symbol
Vin
Iin
Pin
Min.
11.5
BNU
CR
Response Time
Typ.
12
4.5
55
1000
80
500
± 80
± 75
16 ms
Max.
12.5
Operating Temperature
Top
0
50
Operating Humidity
Hop
30
85
Storage Temperature
Tst
-20
+60
Storage Humidity
Hst
10
85
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Unit
Volts
Amps
Watts
cd / m2
%
cd / m2
degree
degree
°C
°RH
°C
°RH
Conditions
Vin=12V
Center; Normal
9-point;10% from edge
Horizontal (CR=10)
Vertical (CR=10)
Tr + Tf
Non-condensing
Non-condensing
LITEMAX
LD1745 Rev: A0
Reliability and Lifetime
Monitor Reliability
Demostrated MTTF testing in progress
Backlight Reliability and Lifetime
CCF lamps; 40,000 hour rated lifetime @ 25°C
CCF lamp life is defined as time to 50% of initial brightness
Backlight end-of-life for this 1745 product is defined as 800 nits center luminance at 25°C
Typical values indicated for luminance and uniformity are indicative of typical steady state values
measured at initial use at 25°C after warm-up to steady state. Actual luminance and uniformity values
are directly dependent on the environmental usage profile. Repeated cold temperature start-up can
cause accelerated aging of the backlight lamps resulting in reduced luminance and uniformity.
Extended High Temperatures and Solar Loading
Extended operation at the upper temperature extreme or in conjunction with extended direct solar
loading can cause permanent mura or localized pixel non-uniformity effects. Other side effects could
include latent image and flicker. These effects are not covered under Litemax warranty. Please
consult Litemax for further guidance on system design to effectively manage environments requiring
extended high temperatures or direct sun-loading. Cooling kit and CEG vandal glass options can
effectively address these issues.
Reliability Test
Test Item
High temperature/humidity
operation
Test ondition
1. 60±2°C, RH=60%, 240 hours,
2. Display data is white.
1. 0°C±3°C…1 hour
Heat cycle (operation)
2. 55°C±3°C…1 hour
3. 50 cycles, 4 hours/cycle
4. Display data is white.
1. -20°C±3°C…1 hour
Thermal shock (non-operation) 2. 60°C±3°C…1 hour
3. 100 cycles, 4 hours/cycle
4. Temperature transition time is within 5 min.
Vibration (non-operation)
5-100Hz, 11.76m/s2, 1 minute/cycle, XYZ direction
10 times each direction
ESD (non-operation)
150pF, 150Ω, ±10kV
9 places on a panel (Note 3)
10 times each place at one-second intervals
Dust (non-operation)
Sample dust: No.15
Hourly 15 seconds stir, 8times repeat
operation
53.3 kPa
0°C±3°C…24 hours
Low pressure
55°C±3°C…24 hours
non-operation 15 kPa
-20°C±3°C…24 hours
-60°C±3°C…24 hours
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Judgement
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
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LD1745 Rev: A0
Electrical characteristics
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LITEMAX
LD1745 Rev: A0
Signal and Power Interface
Connectors
Signal Pin
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LITEMAX
LD1745 Rev: A0
Signal Description
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LD1745 Rev: A0
Interface connection
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LD1745 Rev: A0
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LD1745 Rev: A0
Electrical Interface Connection
Interface Timings
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LITEMAX
LD1745 Rev: A0
Timing Characteristics
Timing Definition
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LD1745 Rev: A0
Power Consumption
Power ON/OFF Sequence
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LD1745 Rev: A0
Backlight Lamp Connections
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LITEMAX
LD1745 Rev: A0
Backlight Lamp Driving Specification
It is recommended to use an inverter with a 1300 Vrms starting voltage to run the HB backlight in the
AU1745 LCD panel module. At the maximum LCD screen luminance, the lamp voltage and current
are listed below:
Operating Voltage
Lamp Current
515
xx
Vrms
mArms
At this driving condition, the backlight delivers the specified maximum LCD screen brightness with
power consumption about 50.4 Watts. Since most inverters used to drive CCFLs have efficiency
about 75% to 80%, the total DC power input to the inverter is about 63.0 Watts. When the backlight is
dimmed down, the power consumption decreases.
Control Board ( LM1513_CB)
1. FEATURES
Parameter
Overall dimensions
width
height
depth(PCB)
Max. output resolution
Data processing
Input impedance
video
sync
Plug-and-Play
Input Signal
Output Signal
Power management
Sync polarity
Sync level
Supply voltage
Max. number of colors
Operating temperature
Storage temperature
Max. weight
Value
Unit
147.4
162
1.6
1280x1024
24
mm
mm
mm
pixel
bit
75
470
DDC1 & DDC2B
Analog RGB / DVI-D / Composite Video / S-Video
TTL and LVDS
VESA® DPMS™
+/TTL compatible
12.0
16.7M
0~ 30
-20~ 60
150±10
ohm
ohm
V dc
color
℃
℃
g
2. DESCRIPTION
This specification defines the characteristics and performance of the LM1513_CB
Designed for LCD monitor and other flat panel display applications, LM1513_CB controller Board
provides an extraordinary display quality and friendly interface for user.This product is capable of
SXGA and lower resolutions，Synchronization signals for the applicable resolution modes can be
detected automatically in the range of horizontal frequency 31.4KHz to 79.9 KHz and vertical
frequency 56Hz to75 Hz.
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LITEMAX
LD1745 Rev: A0
3. BLOCK DIAGRAM
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LD1745 Rev: A0
4. AD BOARD DIMENSION
Dimension : 162mm (L) x 147.4mm (W) x 1.6mm(H)
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LD1745 Rev: A0
FRONT VIEW
BOARD PHOTO
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LITEMAX
LD1745 Rev: A0
4.1CONNECTORS NAME
(
) Mark is mean connector PIN1
Connector Description
JP5 : Key pad connector.
JP_TP : Touch screen power : 5V supplied.
JP_FAN : 12V Fan connector.
CON_5V : Reserved .
J5 : Panel connector.
J3 : Audio board connector (Option).
J1 : AV signal input.
J11 : S-Video signal input.
JP11 : DVI-D input.
JP4 : VGA input connector.
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LITEMAX
LD1745 Rev: A0
J7 : 12V DC in.
JP_H : Reserved 12V DC connector.
JP7 : Inverter control connector.
L_SENSOR : Light sensor connector（Option）
JP_FAN1 : 12V Fan connector.
M1 : Microprocessor.
M2 : Chipset RTD3001.
U1 : Analog to Digital converter.
U2 : Panel Link digital transmitter.
U3 : Video decoder.
4.2 A/D BOARD CONNECTORS INFORMATION
Item
Key Pad connector
Power connector
Power connector
Ref No.
JP5
JP_H,JP_TP
CON_5V,JP_FAN/FAN1
P/N
190600S-10T
190600A-04T
190600A-02T
J5
20012S-80G
J3,JP7
190600S-08T
LCD connector
Audio & Inverter
connector
Video in
S-Video in
DVI in
VGA in
12V input
Light sensor
connector
J1
J11
JP11
JP4
J7
L_SENSOR
310-15FAS-3D
190600S-06T
Description
10PIN,2.0mm/180°
4PIN,2.0mm/90°
2PIN,2.0mm/90°
2.0mm 40x2 Dual Row
Header/180°
8PIN,2.0mm/180°
Standard Video connector
Standard SVideo connector
Standard DVI-D connector
15P D -sub female
2.1mm DC power Jack
6PIN,2.0mm/180°
Key Pad Connector (JP5)
Pin No.
1
2
3
4
5
Function
RED LED
ENTER KEY
RIGHT KEY
LEFT KEY
AUDIO+
Pin No.
6
7
8
9
10
Function
AUDIOPOWER KEY
5VDC
GREEN LED
GND
Power Connector (JP_TP) :Touch screen
Pin No.
1
2
LITEMAX Confidential
Function
5VDC
3.3VDC
Pin No.
3
4
20
Function
12VDC
GND
LITEMAX
LD1745 Rev: A0
Power Connector(JP_FAN/FAN1):FAN
Pin No.
1
Function
12VDC
Pin No.
2
Function
GND
Pin No.
2
Function
GND
Function
AG2
AG1
AG0
GND
AR7
AR6
AR5
AR4
GND
AR3
AR2
AR1
AR0
5VCC
5VCC
5VCC
5VCC
5VCC
GND
BB7
BB6
BB5
BB4
GND
BB3
BB2
BB1
Part No.
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Power Connector(CON_5V):FAN
Pin No.
1
Function
5VDC
Panel Connector : 80 pins (J5)
Part No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Function
GND
DCLK
GND
DEN
GND
DVS
GND
DHS
GND
5VCC
GND
AB7
AB6
AB5
AB4
GND
AB3
AB2
AB1
AB0
GND
AG7
AG6
AG5
AG4
GND
AG3
Part No.
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
Function
BB0
GND
BG7
BG6
BG5
BG4
GND
BG3
BG2
BG1
BG0
GND
BR7
BR6
BR5
BR4
GND
BR3
BR2
BR1
BR0
NC
12VCC
12VCC
DVCC
DVCC
Note. A:even B:odd
※ This 80- pin connector is the interface connector between LM1513_CB &Panel A converter
Board required to adapt either TTL or LVDS inter-f
ace panel，LITEMAX has 4 different converter board available Include
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LITEMAX
LD1745 Rev: A0
（CPT CLAA150X series、Samsung LTM170E series、AU A201SN01、Sharp
LQ181E1LW31），customers may design their own converter board to adapt different panels.
Please see the Page 27: “Con-verter Board”
AUDIO Connector (J3)- reserved
Pin No.
1
2
3
4
Function
GND
GND
MUTE
VOLUME
Pin No.
5
6
7
8
Function
SOURCE SEL
NC
5VDC
12VDC
Composite-VIDEO Connector (J1)
Video input Connector : RCA Jack
Pin
NO
Symbol
1
CVBS
Signal
Name
Video
Signal
Pin
NO
Symbol
Signal
Name
Pin
NO
Symbol
Signal
Name
2
Sound
Right
3
Sound
Left
S-VIDEO input Connector (J11)
Pin NO.
1
2
Symbol
GND 1
GND 2
Signal Name
GND 1
GND 2
Pin No.
3
4
Symbol Signal Name
S-VIDEO LUMINANCE
S-VIDEO COLOR
DVI-D Input connector (JP11)
Pin No.
Function
Pin No.
Function
Pin No.
Function
1
T.M.D.S. Data2-
9
T.M.D.S. Data1-
17
T.M.D.S. Data0-
2
T.M.D.S. Data2+
10
T.M.D.S. Data1+
18
T.M.D.S. Data0+
3
T.M.D.S. Data2/4
Shield
11
T.M.D.S Data1/3
Shield
19
T.M.D.S. Data0/5
Shield
4
T.M.D.S. Data4-
12
T.M.D.S. Data3-
20
T.M.D.S. Data5-
5
T.M.D.S. Data4+
13
T.M.D.S. Data3+
21
T.M.D.S. Data5+
6
DDC Clock
14
+5V Power
22
T.M.D.S. Clock
Shield
7
DDC Data
15
Ground (for +5V)
23
T.M.D.S. Clock+
8
Not Connected
16
Hot Plug Detect
24
T.M.D.S. Clock-
Note. DDC = Display Data Channel
Note. T.M.D.S. = Transition Minimized Differential Signal
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LD1745 Rev: A0
Analog RGB Input connector (JP4)
Pin No.
1
2
3
4
5
6
7
8
Symbol
RED
GREEN
BLUE
GND
GND
RGND
GGND
BGND
Description
Analog Red
Analog Green
Analog Blue
Reserved
Digital GND
Red Return
Green Return
Blue Return
Pin No.
9
10
11
12
13
14
15
Symbol
NC
SGND
NCD
SDA
HSYNC
VSYNC
SCL
Description
+5VDC
Sync GND
Reserved
DDC Serial Data
Horizontal Sync
Vertical Sync
DDC Data Clock
DC POWER JACK (J7)
Pin No.
1
2
Function
GND
GND
Pin No.
3
Function
12VDC
Inverter Connector (JP7)
Pin No.
Symbol
Description
Pin No.
Symbol
1
NC
NC
5
GND
2
NC
NC
6
BRIGHT
3
ON/OFF
Backlight ON/OFF
7
12VDC
4
GND
GND
8
12VDC
Note. Backlight ON=”5V” , OFF=”0V”
Note. Dimming rang from 0V~5V (0V: darkest~5V:brightest)
Description
GND
Dimming adjust
Input 12VDC
Input 12VDC
Light sensor Connector (L_SENSOR)
Pin No.
1
2
3
Function
GND
5VDC
P0.3/CLK
Pin No.
4
5
6
Function
P0.4/DOUT
P0.5/DIN
P0.6/ /CS
5. ELECTRICAL PARAMETERS
Symbol
Description
Min
Typ
Max
Unit
VDD
+12V DC power supply
11
12
13
VDC
Pf
Pixel freq.
140
MHz
F(H)
Horizontal sync frequency
30
80
KHz
F(V)
Vertical sync frequency
56
75
Hz
F (SIH)
Sync input high level
2.5
V
V (SIL)
Sync input low level
0.8
V
IDD1*1
Supply current +12V (w/o LCD & inverter)
0.23
A
IDDPS1 (with LCD & inverter, power save)
0.38
A
Note : Power consumption measuring condition is 2pixel checkerboard pattern
@ SXGA 75Hz and maximum brightness with SHARP LQ181E1LW31 & inverter at 25°C.
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LD1745 Rev: A0
6. Display mode
Mode
1
2
3
4
5
6
7
Resolution
640 x 350
640 x 400
640 x 400
640 x 480
640 x 480
640 x 480
640 x 480
720 x 400
800 x 600
800 x 600
800 x 600
800 x 600
1024 x 768
1024 x 768
1024 x 768
1024 x 768
1280 x 1024
H Freq (kHz)
31.469
24.823
31.469
31.469
35.000
37.861
37.500
31.469
35.156
37.879
48.077
46.875
48.363
56.476
58.038
60.023
75.024
V Freq (Hz)
70.087
56.416
70.087
59.940
66.667
72.809
75.000
70.087
56.250
60.317
72.188
75.000
60.004
70.069
71.918
75.029
79.976
Standard type
VESA standard
Industrial Standard
VESA standard
VESA standard
VESA standard
VESA standard
VESA guideline
VESA standard
VESA standard
VESA guideline
VESA standard
VESA standard
VESA standard
VESA standard
7. LCD PANEL & I/O SUPPORT
The LM1513_CB is an advanced and general application TFT LCD Monitor Control board. Therefore
execution of this board is not limited to panel manufacturer as well as model. Furthermore, this board
operates with any TTL and LVDS interface panel ranging from VGA to SXGA. LM1513_CB can be
driven with three or less timing signals. The usual timing signals to the panel are H-sync, V-sync and
Data Enable.For backlight intensity control mechanism, the built-in DC dimming drive signal is
prepared to the CCFL inverter control port. The CCFL inverter DC power, generally 12V DC, is
prepared to the same port.
8. DVI (Digital Visual Interface)
The LM1513_CB has one DVI input port, which complies with VESA DVI standard. So, users can
connect this port to digital VGA card. The signal source can be selected through OSD.
9. OSD MENU TREE
Main Menu
F
Brightness
H-Position
Auto Set-up
Contrast
V-Position
Auto Balance
GAMMA
Sharpness
Return to Menu
Color
Phase
Hue
Clock
Return to Menu Return to Menu
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Language
OSD Position
Return to Menu
Signal Select
DOS MODE
Full Screen
Color Temp.
Light Sensor
Reset
Return to Menu
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LD1745 Rev: A0
Sub-Menu
GAMMA
OFF
1
2
3
4
5
Language
English
Deutsch
Francais
Nederlands
Svenska
Japan
Light Sensor
OFF
ON
Sharpness F Auto Set-up
1
NO
2
YES
3
Signal Select
VGA
DVI
AV
S-VIDEO
DOS MODE
720X350
640X350
720X400
640X400
Auto Balance
NO
YES
Full Screen
OFF
1
2
OSD Position
1
2
3
4
5
Color Temp.
6500K
9300K
Reset
NO
YES
10. OSD setting procedure（FACTORY MODE ）
※Press 【
button+ POWER
Factory Mode
z
z
z
z
LITEMAX Confidential
button 】 can into the
R/: Adjust the Red of the display
Press the Menu button to display OSD menu.
Press the SOURCE (SELECT) button to enter sub-menu.
Move to R/ setting, Press Menu(Enter)
button.
Press RIGHT or LEFT button, you can adjust your RED
color of the display.
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LD1745 Rev: A0
z
z
z
z
G/: Adjust the Green of the display
Press the Menu button to display OSD menu.
Press the SOURCE (SELECT) button to enter sub-menu.
Move to G/ setting, Press Menu(Enter)
button.
Press RIGHT or LEFT button, you can adjust your
GREEN color of the display.
z
z
z
z
B/: Adjust the Blue of the display
Press the Menu button to display OSD menu.
Press the SOURCE (SELECT) button to enter sub-menu.
Move to B/ setting, Press Menu(Enter)
button.
Press RIGHT or LEFT button, you can adjust your color
of the display.
※ The R.G.B volume default we preset is 50，customers don’t need to adjust，if color quality
has offset，tunning R.G.B volume can let display more smooth.
11. OSD BOARD & MEMBRANE KEY PAD IMAGE
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LD1745 Rev: A0
11.1 OSD BOARD & MEMBRANE KEY PAD DIMENSION
Connector Information
Item
Membrane Key
Pad connector
OSD connector
Ref No.
P/N
Description
JP1
HEADER 8
8PIN,2.54mm/180°
JP2
190600S-08T
8PIN,2.0mm/180°
Membrane Key Pad Connector (JP1) (Connected to Membrane key pad)
Pin No.
1
2
3
4
Function
POWER
GREEN LED
GND
RED LED
Pin No.
5
6
7
8
Function
RIGHT
MENU
LEFT
5VDC
OSD Connector (JP2) (Connected to A/D Board J1)
Pin No.
1
2
3
4
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Function
5VDC
RED LED
MENU
RIGHT
Pin No.
5
6
7
8
27
Function
LEFT
GREEN LED
POWER
GND
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LD1745 Rev: A0
11.2 Membrane button definition
1.Power On/Off :Pressing this button turns the display system on or off.
2.LED Light :This LED indicates different status when this unit operates in different modes.
Green :Power on.
Amber : Standby.
No light : Power off.
3.Adjust +
:This button is used to adjust up the value of selected OSD control option.
4.Menu / Select:This button pops up the OSD menus on the screen and select the OSD control
options on the screen.
5.Adjust-
:This button is used to adjust down the value of selected OSD control option.
11.3 Hot-Key Function
1.
Brightness Switch( )
When you are not in the OSD menu, the ▼ button can be used as a Hot-Key to switch to different
brightness level for different purpose. This monitor has 4 presetting levels as following.
PC
2.
GA ME
TV
M AX
Signal Input Select( )
When you are not in the OSD menu the ▲ button can be used as a Hot-Key to select different
signal input as following.
VGA
D VI
AV
S-VI DEO
12. COMPATIBILITY
There are lots of VGA cards in the market place. In general, the video signal of various VGA cards
complies with VESA recommendations, but sometimes not. The TFT LCD controller boards are
designed under the assumption that every video signal is standardized, therefore, some VGA cards
has mismatch trouble. To avoid this compatibility issue, The compatibility test result will be updated in
near future.
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13. BIOS & FIRMWARE SETTING
Manufacturer
Chunghwa
Chunghwa
Chunghwa
AU
AU
SamSung
SamSung
SamSung
Sharp
NEC
Sanyo
Hannstar
LCD Model
Number
CLAA150XA03
CLAA150XE01
CLAA150XG01
A201SN01
M170EN05
LT170E4
LT170E5
LT170EH
LQ181E1LW31
12”、15”
15~17”
15~17
Resolution
Remark
XGA
XGA
XGA
SVGA
SXGA
SXGA
SXGA
SXGA
SXGA
Note. The A/D board can support a lot of different panel, the above-listed not
show all can support display items，if customer need detailed information. Please contact us.
14. Service Information
When you buy this excellent LCD Monitor, you begin have the 1-year warranty from us. Please contact
us when you need any information or help about our product. Thank you for choosing our product again.
Mechanical Outline for LITEMAX’s AU1745 Panel Drawing
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LITEMAX’s LI3601 inverter
1. Introduction
LI3601 is a CCFL inverter to operate LITEMAX high brightness (HB) backlights. The inverter
has an on-board pulse width modulation (PWM) dimming circuit for extremely wide range
luminance adjustment. Over the entire dimming range, there is no noticeable lamp flickering
and the uniformity of the backlight is well maintained. When using LI3601 with LITEMAX LCD
modules, it is not necessary to synchronize the PWM circuit to vertical sync signal of the LCD.
2. Dimming Control
The LI3601 accepts a 0V to 5V analog voltage for dimming control. It has a pulse width
modulation (PWM) dimming circuit for luminance adjustment. As the dimming voltage (Vd)
decreases from +5V, the lamp current waveform is pulse width modulated at a repetition rate
high enough to prevent LCD flicker. Within each PWM cycle, the lamps in the backlight are
turned fully 'ON' for a fraction of the cycle time. The human eyes, being very slow with respect
to the PWM rate, respond to the average light produced over the PWM cycle. As a result, the
luminance of the backlight and/or the LCD screen is approximately to the duty cycle of the
PWM waveform.
Lamp Current Waveform
t (lamp on)
T (1 PWM cycle)
Duty Cycle = t / T
The lamp current waveform with the PWM circuit set at less than 100%
In general, inverters with PWM dimming have a very wide luminance adjustment range. For
most practical cases, the LI3601 inverter can achieve a dimming ratio up to 200:1. Hence, the
luminance of the backlight or LCD screen can be adjusted from 100% to 0.5%.
The 0V to 5V dimming voltage can be generated simply by a potentiometer, by a digitally
controlled UP/DOWN counter or a digital potentiometer. The inverter provides a regulated +5V
supply to power the dimming circuit. However, the maximum current drain from this source
should be kept less than 5 mA. At a Vd input about 0.34V and less, the duty cycle of the PWM
waveform is 0% and thus, the lamps are 'OFF'. In order to fully utilize the available dimming
voltage, Vd should be biased to about 0.34V and then ramping up to 5.0V.
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3. Electrical Characteristics
The LI3601 inverter operates at 12V DC and can drive up to 12 lamps for a maximum output
power about 63 Watts. In addition, the inverter has a regulated +5V output serving as a voltage
source for the dimming control circuit.
Electrical Characteristics
Param eters
M in
Typ
M ax
Units
Input Voltage (Vin)
11.5
12
12.5
Vdc
Conditions
Input current (I)
5.25
Adc
Vin=12, Vd=5 V
Lam p Starting Voltage (Vst)
1300
Vrm s
Vin=12, Vd=5 V
Frequency (f)
55
O N/O FF Control -O FF
-O N
58
60
Khz
0.2
Vdc
4.9
5
Vdc
M ax brightness
0.34
0.36
Vdc
Zero brightness
5
5.25
Vdc
11.5<Vin<12.5V
5
mA
Floating*
Dim m ing Voltage(Vd)
@ 100% Duty Cycle
@ 0% Duty Cycle
5V O utput (+5VO UT)
4.85
5V O utput Source Current
Absolute M aximum Rating
Param eters
Inverter Input Voltage (Vin)
Operating Temperature Range
Storage Tem perature Range
Min
Max
Units
11
13
Vdc
0
50
C
-20
80
C
4. Interface Connector
J4
J3
pin1
J1
pin1
pin1
CN1
pin 1
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pin1
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Input Connector (CN1)
Pin#
1
2
3
4
5
6
7
8
9
10
Function
5V Output
12V Input
12V Input
Dimming Control
Ground
Ground
ON/OFF Control
NC
PWMCTRL
NC
Output Connector (J2, J3)
PIN#
1
2
3
4
Function
Lamp Connection
Lamp Connection
Lamp Connection
Lamp Connection
Output Connector (J1, J4)
PIN#
1
2
3
4
Function
Lamp Connection
Lamp Connection
NC
Lamp Common
5. Mechanical Drawing
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Precautions : Meaning of Caution Signs
The following caution signs have very important meaning. Be sure to understand following
contents, respectively.
CAUTION : This sign has a meaning that customer will be injured himself and/or the
module will sustain a damage, if he makes a mistake in operations.
This sign has a meaning that customer will get an electric shock if he makes a mistake
in operations.
Cautions
Don’t touch HIGH VOLTAGE PART of the inverter while turn on. Customer will be in
danger of an electric shock.
Attentions
Handling the product
1.
When customer pulls out products from carton box, take hold of both ends without touch the
circuit board. If customer touches it, products may be broken down and/or out of adjustment,
because of stress to mounting parts.
2.
3.
If customer places products temporarily, turn down the display side and place on a flat table.
Handle products with care avoid electrostatic discharge ( e.g. Decrease with earth band, ionic
shower, etc. ), because products ( LCD modules ) may be damaged by electrostatic.
The torque for mounting screws should never exceed 0.39N.m. Over torque may cause
mechanical damage to the product.
Do not press or friction, because LCD panel surface is sensitive. If customer will clean the
product surface, Litemax Corporation or their supplier will recommend the cloth with ethanolic
liquid.
Do not push-pull the interface connectors while turn on, because wrong power sequence may
break down the product.
Connection cables such as flexible cable, and so on, are danger of damage. Do not hook cable
nor pull them.
4.
5.
6.
7.
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Environment
1.
2.
3.
4.
Dewdrop atmosphere must be avoided.
Do not operate and/or stores in high temperature and/or high humidity atmosphere. If customer
store the product, keep in antistatic pouch in room temperature, because of avoidance for dusts
and sunlight.
Do not operate in high magnetic field. Circuit boards may be broken down by it.
Use an original protection sheet on product surface ( polarizer ). Adhesive type protection sheet
should be avoided, because it may change color and/or properties of the polarizer.
Specification for Products
1.
2.
3.
4.
Do not display the fixed pattern for a long time because it may cause image sticking. If the fixed
pattern is displayed on the screen, use a screen saver.
The product may be changed of color by viewing angle because of the use of condenser sheet
for backlight unit.
The product may be changed of luminance by voltage variation, even if power source applies
recommended voltage to backlight inverter.
Optical characteristics may be changed by input signal timings.
Other
1.
2.
3.
4.
5.
All GND, GNDB, VDD and VDDB terminals should be connected without a non-connected signal
line.
Do not disassemble a product and/or adjust volume.
If customer would like to replace backlight lamps, see “Replacement Manual for Backlight”.
If customer user screwnails, pay attention not to insert waste materials in inside of products.
When customer returns product for repair and so on, pack it with original shipping package
because of avoidance of some damages during transportation.
General specifications for the LCD
The following items are neither defects nor failures.
1. Reponse time, luminance and color gamut may be changed by ambient temperature.
2. The LCD may be seemed luminance uniformity, flicker, vertical seam and/or small spot by
display patterns.
3. Optical characteristics ( e.g. luminance, display uniformity, etc. ) gradually is going to change
depending on operating time, and especially low temperature, because the LCD has cold
cathode fluorescent lamps.
Revision History
Date
Rev.
Oct 1, 2003
A
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Description
Initial release
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LITEMAX Electronics Inc. reserves the right to make changes to this document and the
product, which it describes without notice. LITEMAX Electronics Inc. also shall not be
liable for technical or editorial errors or omissions made herein; nor for incidental or
consequential damages resulting from the furnishing, performance, or use of this
product. In addition, LITEMAX Electronics Inc. takes no responsibility for damage
caused by improper use of this product, which does not meet the conditions for use
specified in this specification sheet.
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