LG LC420DUE-SFR1 Schematic

		LC420DUE
	Product Specification
	CONTENTS
Number	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 CHARACTERISTICS	6
3-2	INTERFACE CONNECTIONS	8
3-3	SIGNAL TIMING SPECIFICATIONS	10
3-4	SIGNAL TIMING WAVEFORMS	11
3-5	COLOR DATA REFERENCE	14
3-6	POWER SEQUENCE	15
4	OPTICAL SPECIFICATIONS	17
5	MECHANICAL CHARACTERISTICS	21
6	RELIABILITY	24
7	INTERNATIONAL STANDARDS	25
7-1	SAFETY	25
7-2	EMC	25
7-3	ENVIRONMENT	25
8	PACKING	26
8-1	DESIGNATION OF LOT MARK	26
8-2	PACKING FORM	26
9	PRECAUTIONS	27
9-1	MOUNTING PRECAUTIONS	27
9-2	OPERATING PRECAUTIONS	27
9-3	ELECTROSTATIC DISCHARGE CONTROL	28
9-4	PRECAUTIONS FOR STRONG LIGHT EXPOSURE	28
9-5	STORAGE	28
9-6	HANDLING PRECAUTIONS FOR PROTECTION FILM	28

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LC420DUE

			Product Specification
		RECORD OF REVISIONS
Revision No.	Revision Date	Page	Description
0.1	Aug, 21, 2012	-	Preliminary Specification (First Draft)

0.2Sep, 26, 2012

0.3	Nov, 06, 2012	3	General Description
		5	Electrical characteristics
		6	Electrical characteristics ( Notes 8)
		20	Mechanical characteristics
1.0	Dec, 07, 2012		Final Specification.

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LC420DUE

Product Specification

1. General Description

The LC420DUE is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive display type which is operating in the normally black mode. It has a 41.92 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.

		EEPROM		EPI(RGB)
						Source Driver Circuit
		SCL	SDA		S1	S1920
					G1
LVDS	LVDS 1,2	Timing Controller
2Port
		LVDS Rx + DGA				TFT - LCD Panel
LVDS	Option	Integrated		Control
Select	signal			Signals		(1920 × RGB × 1080 pixels)
	CN1
						[Gate In Panel]
	(51pin)
	I2C
+12.0V				Power Signals
		Power Circuit			G1080
			Block
LED Anode
LED Cathode			CN201 (7pin)			Back light Assembly
LED Anode
LED Cathode

General Features

Active Screen Size	41.92 inches(1064.67mm) diagonal
Outline Dimension	955.8(H) X 554.4(V) X 35.0(B) mm (Typ.)
Pixel Pitch	0.4833 mm x 0.4833 mm
Pixel Format	1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth	8bit, 16.7Million colors
Luminance, White	300 cd/m2 (Center 1point ,Typ.)
Viewing Angle (CR>10)	Viewing angle free ( R/L 178 (Min.), U/D 178 (Min.))
Power Consumption	Total 54.85W [Logic= 6.4W, LED Driver=48.45W (IF_cathode=285mA))
Weight	6.3 kg
Display Mode	Transmissive mode, Normally black
Surface Treatment	Hard coating(3H), Anti-glare treatment of the front polarizer (Haze < 1%)

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LC420DUE

Product Specification

2. Absolute Maximum Ratings

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

Parameter			Symbol		Value		Unit	Note
				Min		Max
Power Input Voltage		LCD Circuit	VLCD	-0.3		+14.0	VDC
LED Input Voltage		Forward Voltage	VF1	-		+127	VDC	1
			VF2			+83
T-Con Option Selection Voltage			VLOGIC	-0.3		+4.0	VDC
Operating Temperature			TOP	0		+50	°C
Storage Temperature			TST	-20		+60	°C	2,3
Panel Front Temperature			TSUR	-		+68	°C	4
Operating Ambient Humidity			HOP	10		90	%RH
Storage Humidity			HST	10		90	%RH	2,3

Note 1. Ambient temperature condition (Ta = 25 ± 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.

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			[(%)RH]	Storage
	Wet Bulb
	Temperature [°C]				40
									Humidity
									40%	Operation
				30
			20
		10
	0								10%
-20	0	10	20	30	40	50	60	70	80
		Dry Bulb Temperature [°C]

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LC420DUE

Product Specification

3. Electrical Specifications

3-1. Electrical Characteristics

It requires two power inputs. One is employed to power for the LCD circuit. The other Is used for the LED backlight .

Table 2. ELECTRICAL CHARACTERISTICS

Parameter	Symbol		Value			Unit	Note
		Min	Typ	Max
Circuit :
Power Input Voltage	VLCD	10.8	12.0	13.2		VDC
Power Input Current	ILCD	-	530	690		mA	1
		-	770	1000		mA	2
Power Consumption	PLCD		6.4	8.3		Watt	1
Rush current	IRUSH	-	-	3.0		A	3

Note 1. The specified current and power consumption are under the VLCD=12.0V, Ta=25 ± 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 power input is 0.5ms (min.).

4.Ripple voltage level is recommended under ±5% of typical voltage

White : 255 Gray

Black : 0 Gray

Mosaic Pattern(8 x 6)

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								LC420DUE
			Product Specification
Table 3. ELECTRICAL CHARACTERISTICS (Continue)
Parameter			Symbol		Values		Unit	Note
				Min	Typ	Max
Backlight Assembly :
Forward Current		Anode	IF (anode)		285		mAdc	±5%
(one array)		Cathode	IF (cathode)	271	285	299	mAdc	2, 3
Forward Voltage			VF1	93	102	111	Vdc	4
			VF2	62	68	74
Power Consumption			PBL	-	48.45	54.15	W	5
Burst Dimming Duty			On duty	1		100	%
Burst Dimming Frequency			1/T	95		182	Hz	7
LED Array : (APPENDIX-V)
Life Time				30,000			Hrs	6

Notes :The design of the LED driver must have specifications for the LED array in LCD Assembly. The electrical characteristics of LED driver are based on Constant Current driving type.

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. When you design or order the LED driver, please make sure unwanted lighting caused by the mismatch of the LED and the driver (no lighting, flicker, etc) has never been occurred. When you confirm it, the LCD– Assembly should be operated in the same condition as installed in your instrument.

1.Electrical characteristics are based on LED Array specification.

2.Specified values are defined for a Backlight Assembly. (IBL :10 LED array/LCM)

3.Each LED array has 1 anode terminal and 1 cathode terminal.

The forward current (IF) of the anode terminal is 285mA and it supplies 285mA into one string, respectively

1string(30 LED PKG)

285mA		285mA
Anode1	° ° °	Cathode	6 Array (1 String)
	1string(20 LED PKG)
285mA		285mA
Anode2	° ° °	Cathode	4 Array (1 String)

4.The forward voltage (VF) of LED array depends on ambient temperature (Appendix-VI)

5.Maximum level of power consumption is measured at initial turn on.

Typical level of power consumption is measured after 1hrs aging at 25 ± 2°C.

6.The life time (MTTF) is determined as the time at which brightness 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, based on duty 100%.

7.The reference method of burst dimming duty ratio.

It is recommended to use synchronous V-sync frequency to prevent waterfall (Vsync * 2 =Burst Frequency)

Though PWM frequency is over 182Hz (max252Hz), function of backlight is not affected.

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LC420DUE

Product Specification

3-2. Interface Connections

This LCD module employs two kinds of interface connection, a 51-pin connector is used for the module electronics and 2pin,2pin connector is used for the integral backlight system.

3-2-1. LCD Module

- LCD Connector(CN1): FI-RE51S-HF(manufactured by JAE) or GT05P-51S-H38(manufactured by LSM) or IS050-C51B-C39(manufactured by UJU)

- Mating Connector : FI-R51HL(JAE) or compatible

Table 4. MODULE CONNECTOR(CN1) PIN CONFIGURATION

No	Symbol	Description		No	Symbol	Description
1	NC or GND	No Connection or Ground		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	No Connection (Note 4)		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-)		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 should be GND for NSB(No Signal Black) during the system interface signal is not. If this pin is “H”, LCD Module displays AGP(Auto Generation Pattern).

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LC420DUE

Product Specification

3-2-2. Backlight Module

[ CN201 ]

1)LED Array ass`y Connector (Plug)

: SMH200-07

(black color, manufactured by Yeonho)

2)Mating Connector (Receptacle)

: SMAW200A-H07AA(Dip Type)

20037WR-H07AA(SMD Type)

(black color, manufactured by Yeonho)

Table 5. BACKLIGHT CONNECTOR PIN CONFIGURATION(CN201)

No	Symbol(CN201)	Description
1	Cathode2	LED output Current
2	N.C	Open
3	Anode2	LED input Current
4	N.C	Open
5	Cathode1	LED output Current
6	N.C	Open
7	Anode1	LED input Current

LPB

Rear view of LCM

2block

1 3 5 7

CN201

1block

2block

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LC420DUE

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
Vertical		Blank	tVB	20	45	69	Lines	1
				(228)	(270)	(300)
		Total	tVP	1100	1125	1149	Lines
				(1308)	(1350)	(1380)
ITEM			Symbol	Min	Typ	Max	Unit	Note
		DCLK	fCLK	63.00	74.25	78.00	MHz
		Horizontal	fH	57.3	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). If you use spread spectrum of EMI, add some additional clock to minimum value for clock margin.

2.The performance of the electro-optical characteristics may be influenced by variance of the vertical refresh rate and the horizontal frequency

3.Spread Spectrum Rate (SSR) for 50KHz ~ 100kHz Modulation Frequency(FMOD) is calculated by (7 – 0.06*Fmod), where Modulation Frequency (FMOD) unit is KHz.

LVDS Receiver Spread spectrum Clock is defined as below figure

Timing should be set based on clock frequency.

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LC420DUE

Product Specification

Please pay attention to the followings when you set Spread Spectrum Rate(SSR) and Modulation Frequency(FMOD)

1.Please set proper Spread Spectrum Rate(SSR) and Modulation Frequency (FMOD) of TV system LVDS output.

2.Please check FOS after you set Spread Spectrum Rate(SSR) and Modulation Frequency(FMOD) to avoid abnormal display. Especially, harmonic noise can appear when you use Spread Spectrum under FMOD 30 KHz.

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