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LM-185WH2-TLA1
Service manual
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LG LM-185WH2-TLA1 Service manual

SPECIFICATION
(◆) Preliminary Specification ( ) Final Specification
LM185WH2
Liquid Crystal Display
Product Specification
FOR
APPROVAL
18.5” HD TFT LCDTitle
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BUYER
MODEL
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General
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*When you obtain standard approval, please use the above model name without suffix
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SUPPLIER LG Display Co., Ltd.
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*MODEL LM185WH2
SUFFIX TLA1
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SIGNATURE DATE
/
/
APPROVED BY
S.G. Hong / G.Manager
REVIEWED BY
S.U. Byun / Manager [C]
Y.H. Hwang / Manager [M]
H.S. Lee / Manager [P]
DATE
/
Please return 1 copy for your confirmation With your signature and comments.
Ver. 0.4 APR., 28, 2010
PREPARED BY
D.K. Heo / Engineer
Product Engineering Dept.
LG Display Co., Ltd
1 / 31
Product Specification
Contents
LM185WH2
Liquid Crystal Display
No
COVER
CONTENTS
RECORD OF REVISIONS
GENERAL DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL SPECIFICATIONS
1)
ELECTRICAL CHARACTERISTICS
2)
INTERFACE CONNECTIONS
3)
LVDS characteristics
4)
SIGNAL TIMING SPECIFICATIONS
5)
SIGNAL TIMING WAVEFORMS
6)
COLOR INPUT DATA REFERNECE
7)
POWER SEQUENCE
8)
POWER DIP CONDITION
OPTICAL SFECIFICATIONS
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MECHANICAL CHARACTERISTICS
RELIABILITY
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ITEM
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Page
1
2
3
41
52
63
6
8
11
14
15
16
17
18
194
245
276
INTERNATIONAL STANDARDS
1)
SAFETY
2)
EMC
PACKING
1)
DESIGNATION OF LOT MARK
2)
PACKING FORM
Ver. 0.4 APR., 28, 2010
287
28
28
298
29
29
30PRECAUTIONS9
30MOUNTING PRECAUTIONS1)
30OPERATING PRECAUTIONS2)
31ELECTROSTATIC DISCHARGE CONTROL3)
31PRECAUTIONS FOR STRONG LIGHT EXPOSURE4)
31STROAGE5)
31HANDLING PRECAUTIONS FOR PROTECTION FILM6)
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Product Specification
Record of revisions
Revision No DescriptionDate Page
Ver 0.0
OCT.,22,2009
LM185WH2
Liquid Crystal Display
Preliminary Specifications
Ver 0.1
Ver 0.2
JAN.,06,2010
10
- Changed LED Pin map
BeforeNo
NC1
NC2 FB13 FB24
VLED5 VLED6
FB37
NC8
After
NC NC
FB3
NC VLED VLED
FB1
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FB2
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NC9
a
NC10
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JAN.,26,2010
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4
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7
- Changed Power Consumption
Before : Total 13.29W(Typ.), 9.79W@IBL=60mA
After : Total 12.72(Typ.), 9.22W@IBL=60mA
Changed LED Bar Electrical Characteristics-
NC
NC
Before After
Parameter
LED String Voltage
Power Consumption
Ver 0.3
Ver 0.4
Ver. 0.4 APR., 28, 2010
MAR.,31,2010
APR.,28,2010
5
4 6
7
Add Notes 2-
2. Storage condition is guaranteed under packing condition.
Changed Electrical Characteristics-
Symbol
I
LCD-MOSAIC
I
LCD-BLACK
P
LCD
- Delete LED Junction Temperature
Typ.
700
3.50
Before
Typ.
54.4
9.79
Max.
910
4.55
Typ.
720
3.60
Typ.
51.2
9.22
After
Max..
940
11709001150880
4.70
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LM185WH2
Liquid Crystal Display
Product Specification
1. General description
LM185WH2-TLA1 is a Color Active Matrix Liquid Crystal Display with a Light Emitting Diode ( White LED) backlight system without LED Driver. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally white mode. It has a 18.5 inch diagonally measured active display area with HD resolution (768 vertical by 1366 horizontal pixel array) Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7M colors with Advanced-FRC(Frame Rate Control). It has been designed to apply the interface method that enables low power, high speed, low EMI. FPD Link or compatible must be used as a LVDS chip. It is intended to support applications where thin thickness, wide viewing angle, low power are critical factors and graphic displays are important. In combination with the vertical arrangement of the sub-pixels, the LM185WH2-TLA1 characteristics provide an excellent flat panel display for office automation products such as monitors.
FIG. 1 Block diagram
RGB
Source driver circuit
S1
LVDS
pair #1
CN1
+5V
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Power circuit
VLCD
Timing
controller
block
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Vled 3ch
G1
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TFT-LCD Panel
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(1366×RGB×768 pixels)
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G768
Backlight assembly (White LED)
S1366
P
General features
Active screen size 18.51 inches (470.1mm) diagonal
Outline Dimension 430.4(H) x 254.6(V) x 9.7(D) mm(Typ.)
Pixel Pitch 0.10*RGB(H)mm x 0.30(V)mm
Pixel Format 1366 horizontal By 768 vertical Pixels. RGB stripe arrangement
Interface LVDS 1Port
Color depth 16.7M colors
Luminance, white 250 cd/m2 ( Center 1Point, typ)
Viewing Angle (CR>10) R/L 170(Typ.), U/D 160(Typ.)
Power Consumption
Weight 1,000g (Typ.)
Display operating mode Transmissive mode, Normally White
Surface treatments
Color Gamut 68% CIE1931
Ver. 0.4 APR., 28, 2010
Total 12.82W(Typ.), (3.60 W@V
Hard coating(3H), Anti-glare treatment of the front polarizer
LCD
, 9.22W@IBL = 60 mA)
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Product Specification
2. Absolute maximum ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.
Table 1. Absolute maximum ratings
LM185WH2
Liquid Crystal Display
60
Values
n
90%
MaxMin
a
60%
40%
10%
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Hu mi dit y [( % )R H]
Parameter Notes
Power Supply Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
Notes : 1. Temperature and relative humidity range are shown in the figure below. Wet bulb temperature should be 39 °C Max, and no condensation of water.
2. Storage condition is guaranteed under packing condition.
FIG. 2 Temperature and relative humidity
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Symbol
LCD
OP
ST
OP
ST
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Wet Bulb Temperature [℃]
30
20
10
0
50
40
Units
°C500T
°C60-20T
%RH9010H
%RH9010H
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Storage
Operation
At 25℃Vdc+6.0-0.3V
1, 2
10 20 30 40 50 60 70 800-20
Dry Bulb Temperature [℃]
Ver. 0.4 APR., 28, 2010
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LM185WH2
Liquid Crystal Display
Product Specification
3. Electrical specifications
3-1. Electrical characteristics
It requires two power inputs. One is employed to power the LCD electronics and to drive the TFT array and liquid crystal. The second input power for the CCFL/Backlight, is typically generated by an inverter. The inverter is an external unit to the LCDs.
Table 2. Electrical characteristics
Values
n
a
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MaxTypMin
y
NotesUnit
Vdc5.55.04.5V
3V0.2--V
1mA940720-I
2mA1170900-
1Watt4.703.60-P
4A3.0--I
Parameter Symbol
MODULE :
Power Supply Input Voltage
Permissive Power Input Ripple
Power Supply Input Current
Power Consumption
Inrush current
Notes :
1. The specified current and power consumption are
under the VLCD=5.0V, 25  2°C,f
whereas mosaic pattern(8 x 6) is displayed and fV is the frame frequency.
2. The current is specified at the maximum current pattern.
3. Permissive power ripple should be measured under VCC=5.0V, 25°C, fV (frame frequency)=75Hz condition and At that time, we recommend the bandwidth configuration of oscilloscope is to be under 20MHz.
4. The duration of rush current is about 5ms and rising time of power Input is 500us  20%.
FIG.3 pattern for Electrical characteristics
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LCD
LCD
LCD-MOSAIC
I
LCD-BLACK
LCD
RUSH
=60Hz condition
V
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power consumption measurement
White : 255Gray Black : 0Gray
Mosaic Pattern(8 x 6)
Ver. 0.4 APR., 28, 2010
power input ripple
Full Black Pattern
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Product Specification
Table 3. LED Bar ELECTRICAL CHARACTERISTICS
ConditionSymbolParameter
Values
LM185WH2
Liquid Crystal Display
Unit
Max.Typ.Min.
Notes
1LED :
2mA6560-IsLED String Current
3V5651.2-VsLED String Voltage
4,6Watt10.089.22-PBarPower Consumption
5Hrs--30,000LED_LTLED Life Time
LED driver design guide : The design of the LED driver must have specifications for the LED in LCD Assembly.
The performance of the LED in LCM, for example life time or brightness, is extremely influenced by the characteristics of the LED driver. So all the parameters of an LED driver should be carefully designed and output current
m
should be Constant current control. Please control feedback current of each string individually to compensate the current variation among the strings of LEDs When you design or order the LED driver, please make sure unwanted lighting caused by the mismatch of the LED and the LED driver (no lighting, flicker, etc) never occurs. When you confirm it, the LCD module should be operated in the same condition as installed in your instrument.
1. Specified values are for a single LED bar.
2. The specified current is input LED chip 100% duty current.
3. The specified voltage is input LED string and Bar voltage at typical 60mA 100% duty current.
4. The specified power consumption is input LED bar power consumption at typical 60 mA 100% duty current.
5. The life is determined as the time at which luminance of the LED is 50% compared to that of
initial value at the typical LED current on condition of continuous operating at 25  2°C.
6. The LED bar power consumption shown above does not include loss of external driver. The used LED bar current is the LED typical current. Min Power Consumption is calculated with PBar = Vs(Min.) x Is(Typ.) x Nstring Max Power Consumption is calculated with PBar = Vbar(Max.) x Is(Typ) x Nstring
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Ver. 0.4 APR., 28, 2010
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Product Specification
3-2. Interface connections
LCD Connector(CN1): GT103-30S-HF15-E2500 or IS100-L30O-C23 (UJU) Mating connector : FI-X30H and FI-X30HL (JAE) or Equivalent
Table 4. Module connector(CN1) pin configuration
LM185WH2
Liquid Crystal Display
Pin 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 28 29 30
Symbol Description
NC PWM_OUT NC GND RX0­ RX0+ GND RX1­ RX1+ GND RX2­ RX2+ GND
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RXCLK­ RXCLK+ GND RX3­ RX3+ GND NC NC NC GND GND GND VLCD VLCD VLCD
VLCD
VLCD
No Connection (For LCD internal use only.) Reference signal for inverter control No Connection (For LCD internal use only.) Ground Minus signal of channel 0 (LVDS) Plus signal of channel 0 (LVDS) Ground Minus signal of channel 1 (LVDS) Plus signal of channel 1 (LVDS) Ground Minus signal of channel 2 (LVDS) Plus signal of channel 2 (LVDS) Ground Minus signal of clock channel (LVDS)
P
Plus signal of clock channel (LVDS) Ground Minus signal of channel 3 (LVDS) Plus signal of channel 3 (LVDS) Ground No Connection (For LCD internal use only.) No Connection (For LCD internal use only.) No Connection (For LCD internal use only.) Ground Ground Ground Power Supply (5.0V) Power Supply (5.0V) Power Supply (5.0V) Power Supply (5.0V) Power Supply (5.0V)
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FIG. 4 Connector diagram
#1 #30
PWM signal
LM185WH2
Liquid Crystal Display
Product Specification
GT103-30S-HF15-E2500 (LSC)
signal pairs
Power(5V)
#1 #30
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Rear view of LCM
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Notes:
1. NC: No Connection.
be connected to the LCD’s metal frame.
3. All V
4. Input Level of LVDS signal is based on the IEA 664 Standard.
5. PWM_OUT is a reference signal for inverter control. This PWM signal is synchronized with vertical frequency. Its frequency is 3 times of vertical frequency, and its duty ratio is 50%. If the system don’t use this pin, do not connect.
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2. All GND(ground) pins should be connected together and to Vss which should also
(power input) pins should be connected together.
LCD
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LM185WH2
Liquid Crystal Display
Product Specification
Table 5. BACKLIGHT CONNECTOR PIN CONFIGURATION
The LED interface connector is a model (10)FH-SM1-GAN (LF)-(SN) manufactured by JST. The mating connector part number are TBD or equivalent. The pin configuration for the connector is shown in the table below.
NotesDescriptionSymbolPin
No ConnectionNC1
No ConnectionNC2
FB3Channel3 Current FeedbackFB33
No ConnectionNC4
LED Power SupplyVLED5
LED Power SupplyVLED6
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Channel2 Current FeedbackFB28
No ConnectionNC9
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No ConnectionNC10
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PCB
1
10
LED
FB1Channel1 Current FeedbackFB17
FB2
[ Figure 5 ] Backlight connector diagram
Ver. 0.4 APR., 28, 2010
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