LG Display LM238WF1-SLA1 Specification
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) Preliminary Specification
(
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LM238WF1
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
BUYER
MODEL
APPROVED BY
/
/
/
General
SIGNATURE
DATE
23.8” Full HD TFT LCD Title
SUPPLIER LG Display Co., Ltd.
*MODEL LM238WF1
SUFFIX SLA1
*When you obtain standard approval,
please use the above model name without suffix
APPROVED BY
C.K. Lee / G.Manager
REVIEWED BY
D.G. Kim / Manager [C]
S.Y. An / Manager [M]
D.H. Kang / Manager [P]
PREPARED BY
S.J. Yeom / Engineer
SIGNATURE
DATE
Please return 1 copy for your confirmation with
your signature and comments.
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LM238WF1
Liquid Crystal Display
Product Specification
Contents
No ITEM
COVER
CONTENTS
RECORD OF REVISIONS
1 GENERAL DESCRIPTION
2 ABSOLUTE MAXIMUM RATINGS
3 ELECTRICAL SPECIFICATIONS
3-1 ELECTRICAL CHARACTREISTICS
3-2 INTERFACE CONNECTIONS
3-3 SIGNAL TIMING SPECIFICATIONS
3-4 SIGNAL TIMING WAVEFORMS
3-5 COLOR INPUT DATA REFERNECE
3-6 POWER SEQUENCE
Page
1
2
3
4
5
6
6
9
14
15
16
17
3-7 V
4 OPTICAL SPECIFICATIONS
5 MECHANICAL CHARACTERISTICS
6 RELIABLITY
7 INTERNATIONAL STANDARDS
7-1 SAFETY
7-2 EMC
7-3 ENVIRONMENT
8 PACKING
8-1 DESIGNATION OF LOT MARK
8-2 PACKING FORM
9 PRECAUTIONS 31
Power Dip Condition
LCD
18
19
25
28
29
29
29
29
30
30
30
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LM238WF1
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
No
0.1 Oct., 11, 2012 - First Draft, Preliminary Specifications
Revision
Date
Page Description
-
Ver. 0.1 Oct., 11, 2012
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LM238WF1
Liquid Crystal Display
Product Specification
1. General Description
LM238WF1 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 black mode. It has a 23 inch diagonally measured
active display area with FHD resolution (1080 vertical by 1920horizontal 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 A-FRC (Advanced Frame Rate Control).
It has been designed to apply the 8Bit 2 port LVDS interface.
It is intended to support displays where high brightness, super wide viewing angle,
high color saturation, and high color are important.
RGB
EEPROM
Source Driver Circuit
LVDS
2port
CN1
(30pin)
+5.0V
+5.0V
V
LED
General Features
I2C
Power Circuit
Timing
Controller
Logic Power
Block
CN2 (6PIN)
[ Figure 1 ] Block diagram
G1
Gate Driver
Circuit
TFT - LCD Panel
(1920 Ý RGB Ý 1080 pixels)
G1080
Active Screen Size 23.8 inches diagonal
Outline Dimension 543.0(H) x 317.4(V) x 11.2(D) mm (Typ.)
Pixel Pitch 0.2745 mm x 0.2745 mm
S1 S1920
Back light Assembly
(LED)
Pixel Format 1920 horiz. By 1080 vert. Pixels RGB stripes arrangement
Color Depth 16.7M colors (6bit + A-FRC)
Luminance, White 250 cd/m
2
( Center 1 Point, Typ.)
Viewing Angle(CR>10) View Angle Free (R/L 178(Typ.), U/D 178(Typ.))
Power Consumption Total 17.3 Watt (Typ.) ( 2.7 Watt
@VLCD, 14.6 Watt @Is=100mA )
Weight 2,270 g (typ.)
Display Operating Mode Transmissive mode, normally black
Panel type Reverse type
Surface Treatment Hard coating(3H), Anti-glare treatment of the front polarizer
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LM238WF1
Liquid Crystal Display
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
Parameter Symbol
Power Input Voltage
Operating Temperature
Storage Temperature
Operating Ambient Humidity
Storage Humidity
LCM Surface Temperature
(Operation)
VLCD -0.3 6.0 Vdc
TOP 0 50 ¶C
TST -20 60 ¶C
HOP 10 90 %RH
HST 10 90 %RH
T
Surface
Values
Units Notes
Min Max
at 25 r 2¶C
1, 2, 3
0 65 1, 4
Note : 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. Maximum Storage Humidity is up to 40, 70% RH only for 4 corner light leakage Mura.
3. Storage condition is guaranteed under packing condition
4. LCM Surface Temperature should be Min. 0 and Max. 65 under the VLCD=5.0V,
fV=60Hz, 25 ambient Temp. no humidity control and LED string current is typical value.
FIG.2 Temperature and relative humidity
90%
60
50
Wet Bulb
Temperature [C]
40
30
20
10
0
10 20 30 40 50 60 70 80 0 -20
Dry Bulb Temperature [C]
Ver. 0.1 Oct., 11, 2012
60%
40%
10%
Storage
Operation
Humidity [(%)RH]
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LM238WF1
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 LED/Backlight, is typically generated by a LED Driver.
The LED Driver is an external unit to the LCDs.
Table 2-1. ELECTRICAL CHARACTERISTICS
Parameter Symbol
MODULE :
Power Supply Input Voltage V
Permissive Power Input Ripple V
Power Supply Input Current I
Power Consumption P
Rush current I
LCD
dRF
LCD
c TYP
RUSH
Min Typ Max
4.5 5 5.5
- 535 655
- 655 815
- 2.7 3.3
- - 3
Values
200
Unit Notes
Vdc
mVp-p 1
mA 2
mA 3
Watt 2
A 4
Note :
1. Permissive power ripple should be measured under V
=5.0V, 25¶C, fV(frame frequency)=MAX
LCD
condition and At that time, we recommend the bandwidth configuration of oscilloscope is to be under
20Mhz. See the next page.
2. The specified current and power consumption are under the V
=5.0V, 25· 2¶C,fV=60Hz condition
LCD
whereas Typical Power Pattern [Mosaic] shown in the [ Figure 3 ] is displayed.
3. The current is specified at the maximum current pattern.
4. Maximum Condition of Inrush current :
The duration of rush current is about 5ms and rising time of power Input is 500us r 20%.(min.).
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LM238WF1
Liquid Crystal Display
Product Specification
• Permissive Power input ripple (V
White pattern
• Power consumption (V
=5V, 25¶C, fV (frame frequency=60Hz condition)
LCD
=5.0V, 25¶C, fv (frame frequency)=MAX condition)
LCD
Black pattern
Typical power Pattern
Maximum power Pattern
FIG.3 Mosaic pattern & White Pattern for power consumption measurement
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Product Specification
Table 2-2. LED Bar ELECTRICAL CHARACTERISTICS
LM238WF1
Liquid Crystal Display
Parameter Symbol
LED String Current Is - 100 105 mA 1, 2, 5
LED String Voltage Vs 45.6 48.8 52.0 V 1, 5
Power Consumption
LED Life Time LED_LT 30,000 - - Hrs 3
PBar - 14.6 15.6 Watt 1, 2, 4
Min. Typ. Max.
Values
Unit Notes
Notes) The LED Bar consists of 48 LED packages, 3 strings (parallel) x 16 packages (serial)
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 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. The specified values are for a single LED bar.
2. The specified current is defined as the input current for a single LED string with 100% duty cycle.
3. The LED life time is defined as the time when brightness of LED packages become 50% or less
than the initial value under the conditions at Ta = 25 r 2¶C and LED string current is typical value.
4. The power consumption shown above does not include loss of external driver.
The typical power consumption is calculated as P
The maximum power consumption is calculated as P
Bar = Vs(Typ.) x Is(Typ.) x No. of strings.
Bar = Vs(Max.) x Is(Typ.) x No. of strings.
5. LED operating conditions are must not exceed Max. ratings.
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LM238WF1
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Table 3. BACKLIGHT CONNECTOR PIN CONFIGURATION(CN2)
The LED interface connector is a model GT108-6P-H26(HF), wire-locking type manufactured by LSM.
The mating connector is a SHJP-06V-S(HF) or SHJP-06V-A-K(HF) and Equivalent.
The pin configuration for the connector is shown in the table below.
Pin Symbol Description
1 FB1 Channel1 Current Feedback
2 NC NC
3 VLED LED Power Supply
4 VLED LED Power Supply
5 FB2 Channel2 Current Feedback
6 FB3 Channel3 Current Feedback
#6 #1
Rear view of LCM
[ Figure 5 ] Backlight connector view
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Liquid Crystal Display
Product Specification
3-2. Interface Connections
3-2-1. LCD Module
- LCD Connector(CN1) : IS100-L30O-C23 (UJU) , GT103-30S-HF15 (LSM)
- Mating Connector : FI-X30C2L (Manufactured by JAE) or Equivalent
Table 3. MODULE CONNECTOR(CN1) PIN CONFIGURATION
No Symbol Description No Symbol Symbol
LM238WF1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FR0M
FR0P
FR1M
FR1P
FR2M
FR2P
GND
FCLKINM
FCLKINP
FR3M
FR3P
SR0M
SR0P
GND
SR1M
Minus signal of odd channel 0 (LVDS)
Plus signal of odd channel 0 (LVDS)
Minus signal of odd channel 1 (LVDS)
Plus signal of odd channel 1 (LVDS)
Minus signal of odd channel 2 (LVDS)
Plus signal of odd channel 2 (LVDS)
Ground
Minus signal of odd clock channel (LVDS)
Plus signal of odd clock channel (LVDS)
Minus signal of odd channel 3 (LVDS)
Plus signal of odd channel 3 (LVDS)
Minus signal of even channel 0 (LVDS)
Plus signal of even channel 0 (LVDS)
Ground
Minus signal of even channel 1 (LVDS)
16
SR1P
17
GND
18
SR2M
19
SR2P
20
SCLKINM
21
SCLKINP
22
SR3M
23
SR3P
24
GND
25
NC
26
NC
PWM_OUT For Control Burst frequency of Inverter
27
28
VLCD
29
VLCD
30
VLCD
Plus signal of even channel 1 (LVDS)
Ground
Minus signal of even channel 2 (LVDS)
Plus signal of even channel 2 (LVDS)
Minus signal of even clock channel (LVDS)
Plus signal of even clock channel (LVDS)
Minus signal of even channel 3 (LVDS)
Plus signal of even channel 3 (LVDS)
Ground
No Connection (I2C Serial interface for LCM)
No Connection.(I2C Serial interface for LCM)
Power Supply +5.0V
Power Supply +5.0V
Power Supply +5.0V
Note: 1. All GND(ground) pins should be connected together and to Vss which should also be connected to
the LCD’s metal frame.
LCD
2. All V
(power input) pins should be connected together.
3. Input Level of LVDS signal is based on the IEA 664 Standard.
4. PWM_OUT signal controls the burst frequency of a inverter.
This signal is synchronized with vertical frequency.
It’s frequency is 3 times of vertical frequency, and it’s duty ratio is 50%.
If you don’t use this pin, it is no connection.
#1 #30
IS100-L30O-C23
#1
#30
Rear view of LCM
FIG.4 Connector diagram
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