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Global LCD Panel Exchange Center www.panelook.com
LM230WF4
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 23" Full HD TFT LCD
BUYER DELL SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LM230WF4
SUFFIX TLA1
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE SIGNATURE
APPROVED BY APPROVED BY
DATE DATE
/ G.T. Kim / G.Manager
REVIEWED BY
/ B.C. Song / Manager
PREPARED BY
/ H.Y. Kim / Engineer
Please return 1 copy for your confirmation with Products Engineering Dept.
your signature and comments. LG. Display Co., Ltd
Ver. 0.7 May. 13. 2009 1 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
CONTENTS
No ITEM Page
COVER 1
CONTENTS 2
RECORD OF REVISIONS 3
1 GENERAL DESCRIPTION 4
2 ABSOLUTE MAXIMUM RATINGS 5
3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTREISTICS 6
3-2 INTERFACE CONNECTIONS 9
3-3 LVDS CHARACTERISTICS 13
3-4 SIGNAL TIMING SPECIFICATIONS 17
3-5 SIGNAL TIMING WAVEFORMS 18
3-6 COLOR DATA REFERNECE 19
3-7 POWER SEQUENCE 20
4 OPTICAL SFECIFICATIONS 21
5 MECHANICAL CHARACTERISTICS 27
6 RELIABLITY 30
7 INTERNATIONAL STANDARDS 31
7-1 SAFETY 31
7-2 EMC 31
7-3 ENVIRONMENT 31
8 PACKING 32
8-1 DESIGNATION OF LOT MARK 32
8-2 PACKING FORM 32
9 PRECAUTIONS 33
Ver. 0.7 May. 13. 2009 2 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision
Revision Date Page Description
No
0.1 Feb. 05. 2009 - Preliminary
0.2 Feb. 16. 2009 17 Timing update
0.3 Mar. 06. 2009 28,29 Update drawings
0.4 Mar. 30. 2009 4 Power consumption update
6 Electrical characteristic update
17 Timing update
21 Color specification update.
25 Measurement distance update
27 Max weight update
0.5 Apr. 08. 2009 28,29 Mechanical drawings update
0.6 Apr. 14. 2009 23 G to G explanation update
0.7 May. 13. 2009 9,11 Interface connection update : Insert MST option Enable and notes
17 Signal timing notes update
20 Power sequence update for optional signal
21 Optical specification update
29 Mechanical drawing update : Tcon board shift
30 Reliability update : Insert operating altitude
31 International standard update : Apply 2nd edition
Ver. 0.7 May. 13. 2009 3 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
1. General Description
LM230WF4 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent Lamp
(CCFL) backlight system. 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 23-inch diagonally measured
active display area with FHD resolution (1080 vertical by 1920 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 A-FRC(Advanced Frame Rate Control). It is intended to support displays where high
brightness, super wide viewing angle and high color saturation, etc.
Mini-LVDS(RGB)
LVDS LVDS 3,4
Source Driver Circuit
2Port CN2
(41pin) Timing Control Block S1 S1920
LVDS 1,2 Dual Gate Driver Circuit
G1
LVDS CN1
2Port (51pin)
TFT - LCD Panel
(1920 RGB 1080 pixels)
VLCD
Power Circuit Block
(+12V)
G1080
VLamp
CN3, 4 (2Pin)
VLamp Backlight Assembly (4 CCFLs)
CN5, 6 (2Pin)
Figure 1. Block Diagram
General Features
Active Screen Size 23 inches (58.42cm) diagonal
Outline Dimension 533.2(H) x 312.0(V) x 20.0(D) mm (Typ.)
Pixel Pitch 0.0884(H) mm x RGB x 0.2652(V) mm
Pixel Format 1920 horizontal x 1080 vertical Pixels, RGB stripe arrangement
Color Depth 8-bit with A-FRC, 16.7M colors
Luminance, White 400 cd/m2 (Center, 1 point)
Viewing Angle(CR>10) R/L 170(Typ.), U/D 160(Typ.)
Power Consumption Total 30.42 W (Typ.) ( 4.92 W @VLCD, 25.50 W @ 400 cd/m2)
Weight 2,600 g (Typ.)
Display Operating Mode Transmissive mode, Normally White
Surface Treatment Hard coating (3H) & Anti-Glare treatment of the front polarizer
Ver. 0.7 May. 13. 2009 4 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or permanent
damage to the unit.
Table 1. Absolute Maximum Ratings
Values
Parameter Symbol Units Notes
Min Max
Power Supply Input Voltage VLCD -0.3 12.4 Vdc at 25 r 2 C
Operating Temperature TOP 0 50 C
Storage Temperature TST -20 60 C
1
Operating Ambient Humidity HOP 10 90 %RH
Storage Humidity HST 10 90 %RH
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.
90%
60
60%
50 Storage
Humidity [(%)RH]
Wet Bulb
Temperature [C]
40
40%
Operation
30
20
10
0
10%
-20 0 10 20 30 40 50 60 70 80
Dry Bulb Temperature [C]
Figure 2. Temperature and Relative Humidity
Ver. 0.7 May. 13. 2009 5 / 34
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LM230WF4
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 other input power for the CCFL is typically generated by an inverter. The inverter is
an external unit to the LCDs.
Table 2. Electrical Characteristics (Module)
Values
Parameter Symbol Unit Notes
Min Typ Max
MODULE :
Power Supply Input Voltage VLCD 11.6 12.0 12.4 Vdc
Permissive Power Input Ripple VdRF 400 mVp-p 1
Differential Impedance Zm 90 100 110 Ohm
I LCD-MOSAIC_60Hz - 410 490 mA 2
I LCD-Black_60Hz - 480 580 mA 3
Power Supply Input Current
I LCD-MOSAIC_120Hz 550 760 mA
I LCD-Black_120Hz 680 1080 mA
Power Consumption PLCD - 4.92 12.96 W 2
Rush current I RUSH - - 3.0 A 4
Note :
1. Permissive power ripple should be measured under VLCD=12.0V, 25 2 C, fV (frame frequency)= 120Hz
condition and at that time, we recommend the bandwidth configuration of oscilloscope is to be under 20MHz.
2. The specified current and power consumption are under the V LCD =12.0V, 25 r 2 C, fV = 60Hz condition
whereas Mosaic pattern shown in the [ Figure 3. ] is displayed.
3. The specified current is measured at the Full black pattern.
4. The duration of rush current is about 5ms and measured under condition that the rising time of power
input is 500us r 20%.
Figure 3. Pattern for Electrical Characteristics
Mosaic Pattern(8 x 6) Full Black Pattern
White : 255Gray Black : 0Gray
Ver. 0.7 May. 13. 2009 6 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
Table 3. Electrical Characteristics (Backlight System)
Values
Parameter Symbol Unit Notes
Min Typ Max
LAMP :
830 850 1,000
Operating Voltage VBL VRMS 1, 2
(8.0mA) (7.5mA) (3.0mA)
Operating Current IBL 3.0 7.5 8.0 mARMS 1
Established Starting Voltage VS 1, 3
at 25 C 1,500 VRMS
at 0 C 1,800 VRMS
Operating Frequency fBL 40 60 70 kHz 4
Discharge Stabilization Time TS 3 min 1, 5
Power Consumption PBL 25.5 28.1 W 6
Life Time 50,000 Hrs 1, 7
Note : The design of the inverter must have specifications for the lamp in LCD Assembly.
The performance of the Lamp in LCM, for example life time or brightness, is extremely influenced by
the characteristics of the DC-AC inverter. So all the parameters of an inverter should be carefully
designed so as not to produce too much leakage current from high-voltage output of the inverter.
When you design or order the inverter, please make sure unwanted lighting caused by the mismatch
of the lamp and the inverter (no lighting, flicker, etc) never occurs. When you confirm it, the LCD -
Assembly should be operated in the same condition as installed in you instrument.
Do not attach a conducting tape to lamp connecting wire.
If the lamp wire attach to a conducting tape, TFT-LCD Module has a low luminance and the inverter
has abnormal action. Because leakage current is occurred between lamp wire and conducting tape.
1. Specified values are for a single lamp.
2. Operating voltage is measured at 25 r 2 C. The variance of the voltage is r 10%.
3. The voltage above VS should be applied to the lamps for more than 1 second for start-up.
(Inverter open voltage must be more than lamp starting voltage.)
Otherwise, the lamps may not be turned on. The used lamp current is the lamp typical current.
4. Lamp frequency may produce interface with horizontal synchronous frequency and as a result this may
cause beat on the display. Therefore lamp frequency shall be as far as possible from the horizontal
synchronous frequency and from its harmonics in order to prevent interference.
5. Let's define the brightness of the lamp after being lighted for 5 minutes as 100%.
TS is the time required for the brightness of the center of the lamp to be not less than 95%.
6. The lamp power consumption shown above does not include loss of external inverter.
The used lamp current is the lamp typical current. (PBL = VBL x IBL x NLAMP )
7. The life time is determined as the time at which brightness of the lamp is 50% compared to that of initial
value at the typical lamp current on condition of continuous operating at 25 r 2 C.
Ver. 0.7 May. 13. 2009 7 / 34
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LM230WF4
Liquid Crystal Display
Product Specification
8. The output of the inverter must have symmetrical(negative and positive) voltage waveform and
symmetrical current waveform (Unsymmetrical ratio is less than 10%). Please do not use the inverter
which has unsymmetrical voltage and unsymmetrical current and spike wave.
Requirements for a system inverter design, which is intended to have a better display performance, a
better power efficiency and a more reliable lamp, are following.
It shall help increase the lamp lifetime and reduce leakage current.
a. The asymmetry rate of the inverter waveform should be less than 10%.
b. The distortion rate of the waveform should be within 2 10%.
* Inverter output waveform had better be more similar to ideal sine wave.
* Asymmetry rate:
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