Service Manuals, User Guides, Schematic Diagrams or docs for : . Various LCD Panels Panel_LG_Display_LC420EUN-SDV4_0_[DS]
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
![Panel_LG_Display_LC420EUN-SDV4_0_[DS]](/pics/5eaf7e0525801.gif)
>> Download Panel_LG_Display_LC420EUN-SDV4_0_[DS] documenatation <<
Text preview - extract from the document
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 42.0" WUXGA TFT LCD
BUYER KDP SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LC420EUN
SUFFIX SDV4 (RoHS Verified)
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE SIGNATURE
APPROVED BY APPROVED BY
DATE DATE
/ J.T. Kim / Team Leader
REVIEWED BY
Y.J. Heo / Project Leader
/
PREPARED BY
Y.M.Cho / Engineer
/
TV Product Development Dept.
LG Display Co., Ltd.
Please return 1 copy for your confirmation with
your signature and comments.
Ver. 1.0 1 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
CONTENTS
Number
N b ITEM Page
P
COVER 1
CONTENTS 2
RECORD OF REVISIONS 3
1 GENERAL DESCRIPTION 4
2 ABSOLUTE MAXIMUM RATINGS 5
3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTERISTICS 6
3-2 INTERFACE CONNECTIONS 8
3-3 SIGNAL TIMING SPECIFICATIONS 12
3-4 LVDS SIGNAL SPECIFICATIONS 13
3-5 COLOR DATA REFERENCE 16
3-6 POWER SEQUENCE 17
4 OPTICAL SPECIFICATIONS 19
5 MECHANICAL CHARACTERISTICS 23
6 RELIABILITY 26
7 INTERNATIONAL STANDARDS 27
7-1 SAFETY 27
7-2 EMC 27
7-3 Environment 27
8 PACKING 28
8-1 INFORMATION OF LCM LABEL 28
8-2 PACKING FORM 28
9 PRECAUTIONS 29
9-1 MOUNTING PRECAUTIONS 29
9-2 OPERATING PRECAUTIONS 30
9-3
93 ELECTROSTATIC DISCHARGE CONTROL 30
9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE 30
9-5 STORAGE 30
9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM 30
Ver. 1.0 2 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
RECORD OF REVISIONS
Revision No. Revision Date Page Description
0.0 Sep, 10, 2010 - Preliminary Specification(First Draft)
0.1 Dec, 22, 2010 - Update electrical/Mechanical/Optical specification
Change the block diagram and electrical specification
0.2 Feb, 11, 2011 4, 6~9
(Internal PWM mode External PWM mode)
0.3 April, 06, 2011 22, 23 Update Mechanical drawing
1.0 April, 18, 2011 5 Change the EXTVBR-B Max voltage
- Final Specification
Ver. 1.0 3 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
1. General Description
The LC420EUN is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED)
ba c k l i g h t s y s t e m . T h e m a t r i x em p l o y s a - S i T h i n F i l m T r a n s i s t o r as th e a c t i v e e l em e n t .
It is a transmissive display type which is operating in the normally black mode. It has a 42.02 inch diagonally
measured active display area with WUXGA resolution (1080 vertical by 1920 horizontal pixel array).
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arrayed in vertical stripes.
Gray scale or the luminance of the sub-pixel color is determined with a 8-bit gray scale signal for each dot.
Therefore, it can present a palette of more than 16.7Million colors.
It has been designed to apply the 8-bit 2-port LVDS interface.
It is intended to support LCD TV, PCTV where high brightness, super wide viewing angle, high color gamut,
high color depth and fast response time are important important.
Mini-LVDS(RGB)
LVDS EEPROM
Source Driver Circuit
2Port
SCL SDA S1 S1920
LVDS
Select LVDS 1,2 G1
Timing Controller
Option
LVDS Rx + DGA
R
signal
CN1
(51pin)
Integrated Control
Signals TFT - LCD Panel
(1920 RGB 1080 pixels)
I2C
[Gate In Panel]
+12.0V
Power Circuit Power Signals
G1080
Block
ExtV
E tVBR-B
+24.0V, GND, On/Off LED Driver Back light Assembly
General Features
Active Screen Size 42.02 inches(1067.31mm) diagonal
Outline Dimension 968.4(H) 564(V) X 10.8(B)/18.3 mm(D) (Typ.)
Pixel Pitch 0.4845 mm x 0.4845 mm
Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth 8bit, 16.7Million colors
Luminance, White 360 cd/m2 (Center 1point ,Typ.)
Viewing Angle (CR>10) Viewing angle free ( R/L 178 (Min.), U/D 178 (Min.))
p
Power Consumption Total 91.3W [Logic= 7.3W, LED Driver=84W (
[ g (ExtVbr_B=100% )]
_
Weight 8.8 Kg (Typ.)
Display Mode Transmissive mode, Normally black
Surface Treatment Hard coating(3H), Anti-glare treatment of the front polarizer (Haze 10%)
Ver. 1.0 4 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
2. Absolute Maximum Ratings
g
The following items are maximum values which, if exceeded, may cause faulty operation or permanent damage
to the LCD module.
Table 1. ABSOLUTE MAXIMUM RATINGS
Value
Parameter Symbol Unit Note
Min Max
LCD Circuit VLCD 0.3
-0.3 +14.0
14.0 VDC
Power Input Voltage
Driver VBL -0.3 + 27.0 VDC
ON/OFF VOFF / VON -0.3 +5.5 VDC 1
Driver Control Voltage
Brightness EXTVBR-B 0.0 +5.5 VDC
T-Con Option Selection Voltage VLOGIC -0.3 +4.0 VDC
Operating Temperature TOP 0 +50 C
2,3
Storage Temperature
g p TST -20 +60 C
Panel Front Temperature TSUR - +68 C 4
Operating Ambient Humidity HOP 10 90 %RH
2,3
Storage Humidity HST 10 90 %RH
Note 1. Ambient temperature condition (Ta = 25 r 2 C )
2. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be Max 39 C, and no condensation of water.
p ,
3. Gravity mura can be guaranteed below 40 C condition.
4. The maximum operating temperatures is based on the test condition that the surface temperature
of display area is less than or equal to 68 C with LCD module alone in a temperature controlled chamber.
Thermal management should be considered in final product design to prevent the surface temperature of
display area from being over 68 . The range of operating temperature may be degraded in case of
improper thermal management in final product design.
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]
Ver. 1.0 5 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3. Electrical Specifications
3-1. El t i l Ch
3 1 Electrical Characteristics
t i ti
It requires two power inputs. One is employed to power for the LCD circuit. The other Is used for the LED
backlight and LED Driver circuit.
Table 2. ELECTRICAL CHARACTERISTICS
Value
Parameter Symbol
y Unit Note
Min Typ Max
Circuit :
Power Input Voltage VLCD 10.8 12.0 13.2 VDC
- 610 790 mA 1
Power Input Current ILCD
- 920 1200 mA 2
Power Consumption PLCD 7.32 8.05 Watt 1
Rush current IRUSH - - 5.0 A 3
Note 1. The specified current and power consumption are under the VLCD=12.0V, Ta=25 r 2 C, fV=60Hz
condition, and mosaic pattern(8 x 6) is displayed and fV is the frame frequency.
2. The current is specified at the maximum current pattern.
3. The duration of rush current is about 2ms and rising time of p
g power input is 0.5ms (
p (min.).
)
White : 255 Gray
Black : 0 Gray
Mosaic Pattern(8 x 6)
Ver. 1.0 6 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
Table 3. ELECTRICAL CHARACTERISTICS (Continue)
Values
Parameter Symbol Unit Notes
Min Typ Max
LED Driver :
Power Supply Input Voltage VBL 22.8 24.0 25.2 Vdc 1
Power Supply Input Current IBL - 3.5 3.9 A 1
VBL = 22.8V
(In-Rush)
Power Supply Input Current (In Rush) In rush
In-rush - - 4.85
4 85 A ExtVBR B = 100%
BR-B
4
Power Consumption PBL - 84.0 91.9 W 1
On V on 2.5 - 5.0 Vdc
On/Off
Off V off -0.3 0.0 0.7 Vdc
Input Voltage for 5 - 100 % On Duty
Control System Brightness Adjust ExtVBR-B 6
Signals 1 - 100 %
PAL 100 Hz 3
ExtVBR-B Frequency
NTSC 120 Hz 3
LED :
Life Time 30,000 Hrs 2
Notes
N t :
1. Electrical characteristics are determined after the unit has been `ON' and stable for approximately 60
minutes at 25 2 C. The specified current and power consumption are under the typical supply Input voltage
24Vand VBR (ExtVBR-B : 100%), it is total power consumption.
2. The life time (MTTF) is determined as the time which luminance of the LED is 50% compared to that of initial
value at the typical LED current (ExtVBR-B :100%) on condition of continuous operating in LCM state at
25 2 C.
3. LGD recommend that the PWM freq. is synchronized with One time harmonic of V_sync signal of system.
Though PWM frequency is over 120Hz (
g q y (max 252Hz), function of LED Driver is not affected.
),
4. The duration of rush current is about 200ms. This duration is applied to LED on time.
5. Even though inrush current is over the specified value, there is no problem if I2T spec of fuse is satisfied.
6. ExtVBR-B signal have to input available duty range and sequence.
After Driver ON signal is applied, ExtVBR-B should be sustained from 5% to 100% more than 500ms.
After that, ExtVBR-B 1% and 100% is possible
For more information, please see 3-6-2. Sequence for LED Driver.
Ver. 1.0 7 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-2. Interface Connections
This LCD module employs two kinds of interface connection 51 pin connector is used for the module
connection, 51-pin
electronics and 14-pin connector is used for the integral backlight system.
3-2-1. LCD Module
- LCD Connector(CN1): FI-R51S-HF(manufactured by JAE) or compatible
- Mating Connector : FI-R51HL(JAE) or compatible
Table 4. MODULE CONNECTOR(CN1) PIN CONFIGURATION
No Symbol Description No Symbol Description
1 NC No Connection (Note 4) 27 NC No Connection
2 NC No Connection (Note 4) 28 R2AN SECOND LVDS Receiver Signal (A-)
3 NC No Connection (Note 4) 29 R2AP SECOND LVDS Receiver Signal (A+)
4 NC No Connection (Note 4) 30 R2BN SECOND LVDS Receiver Signal (B-)
5 NC No Connection (Note 4) 31 R2BP SECOND LVDS Receiver Signal (B+)
6 NC No Connection (Note 4) 32 R2CN SECOND LVDS Receiver Signal (C-)
7 LVDS Select H =JEIDA , L or NC = VESA 33 R2CP SECOND LVDS Receiver Signal (C+)
8 NC N C
No Connection (N t 4)
ti (Note 34 GND Ground
9 NC No Connection (Note 4) 35 R2CLKN SECOND LVDS Receiver Clock Signal(-)
10 NC No Connection (Note 4) 36 R2CLKP SECOND LVDS Receiver Clock Signal(+)
11 GND Ground 37 GND Ground
12 R1AN FIRST LVDS Receiver Signal (A-) 38 R2DN SECOND LVDS Receiver Signal (D-)
13 R1AP FIRST LVDS Receiver Signal (A+) 39 R2DP SECOND LVDS Receiver Signal (D+)
14 R1BN FIRST LVDS Receiver Signal (B-) 40 NC No Connection
15 R1BP FIRST LVDS Receiver Signal (B+) 41 NC No Connection
16 R1CN FIRST LVDS Receiver Signal (C )
(C-) 42 NC or GND No Connection or Ground
17 R1CP FIRST LVDS Receiver Signal (C+) 43 NC or GND No Connection or Ground
18 GND Ground 44 GND Ground
19 R1CLKN FIRST LVDS Receiver Clock Signal(-) 45 GND Ground
20 R1CLKP FIRST LVDS Receiver Clock Signal(+) 46 GND Ground
21 GND Ground 47 NC No connection
22 R1DN FIRST LVDS Receiver Signal (D-) 48 VLCD Power Supply +12.0V
23 R1DP FIRST LVDS Receiver Signal (D+) 49 VLCD Power Supply +12.0V
24 NC No Connection 50 VLCD Power Supply +12.0V
25 NC No Connection 51 VLCD Power Supply +12.0V
26 NC or GND No Connection or Ground - - -
Note
1. All GND(ground) pins should be connected together to the LCD module's metal frame.
2. All VLCD (power input) pins should be connected together.
3. All Input levels of LVDS signals are based on the EIA 644 Standard.
4. #1~#6 & #8~#10 NC (No Connection): These pins are used only for LGD (Do not connect)
5. Specific pin No. #44 is used for "No signal detection" of system signal interface.
It h ld be for NSB(No Signal Bl k) d i the system i
I should b GND f NSB(N Si l Black) during h f i l is
interface signal i not.
If this pin is "H", LCD Module displays AGP(Auto Generation Pattern).
Ver. 1.0 8 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-2-2. Backlight Module
Master
M t
-LED Driver Connector
: 20022WR - H14B1(Yeonho) or Equivalent
- Mating Connector
: 20022HS - 14B2(Yeonho) or Equivalent
Table 5. LED DRIVER CONNECTOR PIN CONFIGURATION
Pin No Symbol Description Note
1 VBL Power Supply +24.0V
2 VBL Power Supply +24.0V
3 VBL Power Supply +24.0V
4 VBL Power Supply +24.0V
5 VBL Power Supply +24.0V
6 GND Backlight Ground
7 GND Backlight Ground
8 GND Backlight Ground 1
9 GND Backlight Ground
10 GND Backlight Ground
11 Status Back Light Status 2
12 VON/OFF Backlight ON/OFF control
13 NC Don't care
14 EXTVBR-B External PWM 3
Notes :1. GND should be connected to the LCD module's metal frame.
2. Normal : Low (under 0.7V) / Abnormal : High (upper 3.0V)
3. High : on duty / Low : off duty, Pin#14 can be opened. ( if Pin #14 is open , EXTVBR-B is 100% )
4.
4 Each impedance of pin #12 and 14 is over 50 [K] .
Rear view of LCM
PCB
1 14
1 14
...
...
Ver. 1.0 9 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-3. Signal Timing Specifications
Table 6 shows the signal timing required at the input of the LVDS transmitter. All of the interface signal
timings should be satisfied with the following specification for normal operation.
Table 6. TIMING TABLE (DE Only Mode)
ITEM Symbol Min Typ Max Unit Note
Display
tHV 960 960 960 tCLK 1920 / 2
Period
Horizontal
Blank tHB 100 140 240 tCLK 1
Total tHP 1060 1100 1200 tCLK
Display
tVV 1080 1080 1080 Lines
Period
20 45 69
Vertical Blank tVB Lines 1
(228) (270) (300)
1100 1125 1149
Total tVP Lines
(1308) (1350) (1380)
ITEM Symbol Min Typ Max Unit Note
DCLK fCLK 63.00 74.25 78.00 MHz
Horizontal fH 57.3
57 3 67.5
67 5 70 KHz 2
Frequency
2
57 60 63
Vertical fV Hz NTSC : 57~63Hz
(47) (50) (53)
(PAL : 47~53Hz)
Note: 1. The input of HSYNC & VSYNC signal does not have an effect on normal operation (DE Only Mode).
d t f EMI dd dditi l l k to i i l for l k i
If you use spread spectrum of EMI, add some additional clock t minimum value f clock margin.
2. The performance of the electro-optical characteristics may be influenced by variance of the vertical
refresh rate and the horizontal frequency
Timing should be set based on clock frequency.
Ver. 1.0 10 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-4. LVDS Signal Specification
3-4-1. LVDS Input Signal Timing Diagram
0.7VDD
DE, Data
0.3VDD
tCLK
0.5 VDD
DCLK
Valid data
First data Invalid data Pixel 0,0 Pixel 2,0 Invalid data
Valid data
Second data Invalid data Pixel 1,0 Pixel 3,0 Invalid data
DE(Data Enable)
tHV
tHP
1 1080
DE(Data Enable)
tVV
tVP
Ver. 1.0 11 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-4-2. LVDS Input Signal Characteristics
1) DC Specification
S ifi ti
LVDS -
LVDS +
V CM V IN _ MAX V IN _ MIN
# V CM = {( LVDS +) + ( LVDS - )} /2
)
0V
Description Symbol Min Max Unit Note
LVDS Common mode Voltage VCM 1.0 1.5 V -
LVDS Input Voltage Range VIN 0.7 1.8 V -
Change in common mode Voltage VCM - 250 mV -
2) AC Specification
Tclk
LVDS Clock
A
LVDS Data
( F clk = 1 /T clk )
tSKEW tSKEW
A
Tclk
LVDS 1'st Clock 80%
LVDS 2nd / 3rd / 4th Clock
20%
tRF
tSKEW_min tSKEW_max
Description Symbol Min Max Unit Note
High Threshold VTH 100 300 mV
LVDS Differential Voltage 3
Low Threshold VTL -300 -100 mV
LVDS Clock to Data Skew tSKEW - |(0.25*Tclk)/7| ps -
LVDS Clock/DATA Rising/Falling time tRF 260 |(0.3*Tclk)/7| ps 2
Eff ti ti of LVDS
Effective time f teff | 360| - ps -
LVDS Clock to Clock Skew (Even to Odd) tSKEW_EO - |1/7* Tclk| ps -
Note 1. All Input levels of LVDS signals are based on the EIA 644 Standard.
2. If tRF isn't enough, teff should be meet the range.
3. LVDS Differential Voltage is defined within teff
Ver. 1.0 12 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
360ps
0.5tui tui
V+
data
VTH
Vcm
VTL
V
V-
360ps
data
teff
V+ tui : Unit Interval
clk
Vcm
V-
clk
Ver. 1.0 13 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-5. Color Data Reference
The brightness of each primary color(red,green,blue) is based on the 8-bit gray scale data input for the color
the higher the binary input, the brighter the color. The table below provides a reference for color versus data
input.
Table 7. COLOR DATA REFERENCE
Input Color Data
RED GREEN BLUE
Color
MSB LSB MSB LSB MSB LSB
R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
Black 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Red (255) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Green (255) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
Basic ( )
Blue (255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Color Cyan 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Magenta 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Yellow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
White 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
RED (000) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (001) 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED ... ... ... ...
RED (254) 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RED (255) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
GREEN (000) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
GREEN (001) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
GREEN ... ... ... ...
GREEN (254) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0
GREEN (255) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
BLUE (000) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
BLUE (001) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
BLUE ... ... ... ...
BLUE (254) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0
BLUE (255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Ver. 1.0 14 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-6. Power Sequence
3-6-1.
3-6-1 LCD Driving circuit
90% 90%
Power Supply For LCD
VLCD 10% 10% 10%
0V
T8
T1
T5
T2
Valid Data Vcm
V : LVDS Common mode Voltage
30%
Interface Signal (Tx_clock) 0V
100% T3 T4
T6
User Control Signal
(
(LVDS_select) )
Power for LED T7 LED ON
Table 8. POWER SEQUENCE
Value
Parameter Unit Notes
Min
Mi Typ
T Max
M
T1 0.5 - 20 ms 1
T2 0 - - ms 2
T3 200 - - ms 3
T4 200 - - ms 3
T5 1.0 - - s 4
T6 - - T2 ms 5
T7 0.5 - - s 6
T8 100 - - ms 7
1. Even though T1 is over the specified value, there is no problem if I2T spec of fuse is satisfied.
Note : 2. If T2 is satisfied with specification after removing LVDS Cable, there is no problem.
3. The T3 / T4 is recommended value, the case when failed to meet a minimum specification,
abnormal display would be shown. There is no reliability problem.
4. T5 should be measured after the Module has been fully discharged between power off and on period.
5.
5 If the on time of signals (Interface signal and user control signals) precedes the on time of Power (VLCD)
),
it will be happened abnormal display. When T6 is NC status, T6 doesn't need to be measured.
6. If there is no abnormal display, no problem.
7. It is recommendation specification that T8 has to be 100ms as a minimum value.
Please avoid floating state of interface signal at invalid period.
When the power supply for LCD (VLCD) is off, be sure to pull down the valid and invalid data to 0V.
Ver. 1.0 15 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
3-6-2. Sequence for LED Driver
Power S
P Supply F LED D i
l For Driver
24V (typ.)
90% 90%
VBL
10%
0V
T1 T2 T3
VON/OFF
LED ON
ExtVBR-B
T4 T6
3-6-3. Dip condition for LED Driver
T5
VBL : 24V
VBL(Typ.) x 0.8
0V
Table 9. Power Sequence for LED Driver
Values
Parameter Units Remarks
Min Typ Max
T1 20 - - ms 1
T2 500 - - ms
T3 10 - - ms
T4 0 - - ms
T5 - - 10 ms VBL(Typ) x 0.8
T6 500 - - ms 2
Notes : 1. T1 describes rising time of 0V to 24V and this parameter does not applied at restarting time.
Even though T1 is over the specified value, there is no problem if I2T spec of fuse is satisfied.
2. In T6 section, ExtVBR-B should be sustained from 5% to 100% .
Ver. 1.0 16 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
4. Optical Specification
Optical characteristics are determined after the unit has been `ON' and stable in a dark environment at 25 2 C.
The values are specified at 50cm from the LCD surface at a viewing angle of ) and T equal to 0 .
FIG. 1 shows additional information concerning the measurement equipment and method.
LCD Module Pritchard 880 or
Optical Stage(x,y)
equivalent
50cm
FIG. 1 Optical Characteristic Measurement Equipment and Method
Ta= 25 2 C, VLCD=12.0V, fV=60Hz, Dclk=74.25MHz,
Table 10. OPTICAL CHARACTERISTICS EXTVBR-B =100%
Value
Parameter Symbol Unit Note
Min Typ Max
Contrast Ratio CR 1000 1400 - 1
Surface Luminance, white LWH 290 360 - cd/m2 2
Luminance Variation G WHITE 5P - - 1.3 3
Variation G to G 6 9 ms 4
Response Time
Gray to Gray (BW) G to G BW 8 12 5
Rx 0.637
RED
Ry 0.341
Gx 0.325
GREEN
Color Coordinates Gy Typ 0.600 Typ
[CIE1931] Bx -0.03 0.152 +0.03
BLUE
By 0.051
Wx 0.279
0 279
WHITE
Wy 0.292
Color Temperature 10,000 K
Color Gamut 68 %
Viewing Angle (CR>10)
x axis, right(I=0 ) Tr 89 - -
x axis, left (I=180 ) Tl 89 - -
degree 6
y axis up (I=90 )
axis, Tu 89 - -
y axis, down (I=270 ) Td 89 - -
Gray Scale - - - 7
Ver. 1.0 17 /35
One step solution for LCD / PDP / OLED panel application: Datasheet, inventory and accessory! www.panelook.com
Global LCD Panel Exchange Center www.panelook.com
LC420EUN
Product Specification
Note : 1. Contrast Ratio(CR) is defined mathematically as :
CR(Contrast Ratio) = Maximum CRn (n=1, 2, 3, 4, 5)
Surface Luminance at position n with all white p
p pixels
CRn
CR =
Surface Luminance at position n with all black pixels
n = the Position number(1, 2, 3, 4, 5). For more information, see FIG 2.
2. Surface luminance are determined after the unit has been `ON' and 1 Hour after lighting the
backlight in a dark environment at 25 2 C. Surface luminance is the luminance value at center
1-point across the LCD surface 50cm from the surface with all pixels displaying white.
For more information see the FIG. 2.
3. The variation in surface luminance , G WHITE is defined as :
G WHITE(5P) = Maximum(Lon1,Lon2, Lon3, Lon4, Lon5) / Minimum(Lon1,Lon2, Lon3, Lon4, Lon5)
Where Lon1 t Lon5 are th luminance with all pixels di l i white at 5 l
Wh to the l i ith ll i l displaying hit t locations .ti
For more information, see the FIG. 2.
4. Response time is the time required for the display to transit from any gray to white (Rise Time, TrR)
and from any gray to black (Decay time, TrD). For additional information see the FIG. 3.
G to GBW Spec stands for average value of all measured points.
Photo Detector : RD-80S / Field : 2
5. G to G is Variation of Gray to Gray response time composing a picture
Xi = Individual Data
G to G ( ) =
◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo