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LM230WF8
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 23" Full HD TFT LCD
BUYER General SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LM230WF8
SUFFIX TLA2
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE SIGNATURE
APPROVED BY APPROVED BY
DATE DATE
/ J.H Park / G.Manager
REVIEWED BY
/ H.Y Kim / Manager
PREPARED BY
/ S.W Yoo / Engineer
Please return 1 copy for your confirmation with MNT Products Engineering Dept.
your signature and comments. LG Display Co., Ltd
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LM230WF8
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
1) ELECTRICAL CHARACTERISTICS 6
2) INTERFACE CONNECTIONS 8
3) LVDS characteristics 11
4) SIGNAL TIMING SPECIFICATIONS 14
5) SIGNAL TIMING WAVEFORMS 15
6) COLOR INPUT DATA REFERNECE 16
7) POWER SEQUENCE 17
8) POWER DIP CONDITION 18
4 OPTICAL SPECIFICATIONS 19
5 MECHANICAL CHARACTERISTICS 25
6 RELIABILITY 28
7 INTERNATIONAL STANDARDS 29
1) SAFETY 29
2) EMC 29
8 PACKING 30
1) DESIGNATION OF LOT MARK 30
2) PACKING FORM 30
9 PRECAUTIONS 31
1) MOUNTING PRECAUTIONS 31
2) OPERATING PRECAUTIONS 31
3) ELECTROSTATIC DISCHARGE CONTROL 32
4) PRECAUTIONS FOR STRONG LIGHT EXPOSURE 32
5) STROAGE 32
6) HANDLING PRECAUTIONS FOR PROTECTION FILM 32
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LM230WF8
Liquid Crystal Display
Product Specification
Record of revisions
Revision No Date Page Description
Ver. 0.1 Apr. 25, 2011 - First Draft, Preliminary Specifications.
Ver. 0.1 Apr. 25. 2011 3 / 32
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LM230WF8
Liquid Crystal Display
Product Specification
1. General description
LM230WF8-TLA2 is a Color Active Matrix Liquid Crystal Display 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 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 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(Low Voltage
Differential Signaling) 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 LM230WF8-TLA2 characteristics provide an excellent flat panel display for office automation
products such as monitors.
RGB
FIG. 1 Block diagram
Source driver circuit
S1 S1920
LVDS G1
pair #1 Timing
LVDS controller
pair #2 TFT-LCD Panel
(1920 RGB 1080 pixels)
CN1
(30pin)
+5V Power circuit G1080
VLCD block
Backlight assembly (Single LED Bar)
FB 4ch
General features
Active screen size 23 inches(58.42cm) diagonal(Aspect ratio 16:9)
Outline Dimension 533.2(H) x 312.0(V) x 10.7(D) mm (Typ.)
Pixel Pitch 0.265mm x 0.265mm
Pixel Format 1920 horizontal By 1080 vertical Pixels. RGB stripe arrangement
Interface LVDS 2Port
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.)
3D Viewing Angle(3DCT<10) R/L 40/40 (Typ.), U/D 12 (Typ.)
Power Consumption Total 27.12 W (Typ.), ( 6.0 W@VLCD , 21.12 W@W/O_Driver)
Weight 1,700 g (Typ.)
Display operating mode Transmissive mode, normally White
Surface treatments Anti Glare
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LM230WF8
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
Values
Parameter Symbol Units Notes
Min Max
Power Supply Input Voltage VLCD -0.3 +6.0 Vdc At 25
Operating Temperature TOP 0 50 C
Storage Temperature TST -20 60 C
1,2,3
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.
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.
FIG. 2 Temperature and relative humidity
90%
60
60%
Humidity [(%)RH]
50 Storage
Wet Bulb
Temperature [ ]
40
40%
Operation
30
20
10
0
10%
-20 0 10 20 30 40 50 60 70 80
Dry Bulb Temperature [ ]
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LM230WF8
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. Electrical characteristics
Values
Parameter Symbol Unit Notes
Min Typ Max
MODULE :
Power Supply Input Voltage VLCD 4.5 5.0 5.5 Vdc
Permissive Power Input Ripple VLCD - - 0.4 V 3
ILCD-MOSAIC - 1200 1350 mA 1
Power Supply Input Current
ILCD-BLACK - 1400 1600 mA 2
PLCD - 6.0 6.90 Watt
Power Consumption 1
PLCD-BLACK - 7.0 8.0 Watt
Inrush current IRUSH - - 3.5 A 3
Note :
1. The specified current and power consumption are
under the VLCD=5.0V, 25 r 2 C,fV=60Hz condition
whereas mosaic pattern(8 x 6) is displayed and f V 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 2ms and rising time of power Input is 500us r 20%.
FIG.3 pattern for Electrical characteristics
power consumption measurement power input ripple
White : 255Gray
Black : 0Gray
Mosaic Pattern(8 x 6) Full Black Pattern
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LM230WF8
Liquid Crystal Display
Product Specification
Table 3. LED bar Electrical characteristics
Values
Parameter Symbol Condition Unit Notes
Min. Typ. Max.
LED : 1,7
LED String Current Is - 110 120 mA 2,7
LED String Voltage Vs 45 48 51 V 3,7
Power Consumption PBar 19.80 21.12 22.44 Watt 4,6,7
LED Life Time LED_LT 30,000 - - Hrs 5,7
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. 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 110 mA 100% duty current.
4. The specified power consumption is input LED bar power consumption at typical 110 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 r 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
7. LED operating DC Forward Current and Junction Temperature must not exceed LED Max Ratings at 25 r 2 C.
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LM230WF8
Liquid Crystal Display
Product Specification
3-2. Interface connections
LCD connector(CN1) : IS100-L30O-C23(UJU), GT103-30S-H15 (LSM)
Mating connector : FI-X30H and FI-X30HL (JAE) or Equivalent
Table 4. Module connector(CN1) pin configuration
Pin No Symbol Description
1 RXO0- Minus signal of 1st channel 0 (LVDS)
2 RXO0+ Plus signal of 1st channel 0 (LVDS)
3 RXO1- Minus signal of 1st channel 1 (LVDS)
4 RXO1+ Plus signal of 1st channel 1 (LVDS)
5 RXO2- Minus signal of 1st channel 2 (LVDS)
6 RXO2+ Plus signal of 1st channel 2 (LVDS) First Pixel data
7 GND Ground
8 RXOC- Minus signal of 1st clock channel (LVDS)
9 RXOC+ Plus signal of 1st clock channel (LVDS)
10 RXO3- Minus signal of 1st channel 3 (LVDS)
11 RXO3+ Plus signal of 1st channel 3 (LVDS)
12 RXE0- Minus signal of 2nd channel 0 (LVDS)
13 RXE0+ Plus signal of 2nd channel 0 (LVDS)
14 GND Ground
15 RXE1- Minus signal of 2nd channel 1 (LVDS)
16 RXE1+ Plus signal of 2nd channel 1 (LVDS)
17 GND Ground
Second Pixel data
18 RXE2- Minus signal of 2nd channel 2 (LVDS)
19 RXE2+ Plus signal of 2nd channel 2 (LVDS)
20 RXEC- Minus signal of 2nd clock channel (LVDS)
21 RXEC+ Plus signal of 2nd clock channel (LVDS)
22 RXE3- Minus signal of 2nd channel 3 (LVDS)
23 RXE3+ Plus signal of 2nd channel 3 (LVDS)
24 GND Ground
25 NC No Connection (For LCD internal use only.)
26 NC No Connection (For LCD internal use only.)
27 NC No Connection (For LCD internal use only.)
28 VLCD Power Supply (5.0V)
29 VLCD Power Supply (5.0V)
30 VLCD Power Supply (5.0V)
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LM230WF8
Liquid Crystal Display
Product Specification
FIG. 4 Connector diagram
IS100-L30O-C23(UJU)
# CN1 #30
#11 #30
1'st signal pairs
2'nd signal pairs
Power(+5V)
Rear view of LCM
Note:
1. NC: No Connection.
2. All GND (ground) pins should be connected together and to Vss which should also
be connected to the LCD's metal frame.
3. All VLCD (power input) pins should be connected together.
4. Input Level of LVDS signal is based on the IEA 664 Standard.
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LM230WF8
Liquid Crystal Display
Product Specification
The LED interface connector is a model 10019HR-H06B manufactured by YEONHO.
The pin configuration for the connector is shown in the table below.
Table 5. LED connector pin configuration
Pin Symbol Description Notes
1 FB1 Channel1 Current Feedback
2 FB2 Channel2 Current Feedback
3 VLED LED Power Supply
4 VLED LED Power Supply
5 FB3 Channel3 Current Feedback
6 FB4 Channel4 Current Feedback
FIG. 5 Backlight connector view
Insert
1 6
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LM230WF8
Liquid Crystal Display
Product Specification
3-3. LVDS characteristics
3-3-1. DC Specification
LVDS -
|VID|
LVDS +
VCM VIN_MAX VIN_MIN
# |VID| = |(LVDS+) (LVDS-)|
# VCM = {(LVDS+) + (LVDS-)}/2
0V
Description Symbol Min Max Unit Notes
LVDS Differential Voltage |VID| 200 600 mV -
LVDS Common mode Voltage VCM 0.6 1.8 V -
LVDS Input Voltage Range VIN 0.3 2.1 V -
3-3-2. AC Specification
Tclk
LVDS Clock
LVDS Data
t SKEW ( Fclk =1 / Tclk )
1 ) 85MHz >Fclk 65MHz : -350 ~ + 350
t SKEW
2 ) 65MHz >Fclk 25MHz : -600 ~ + 600
Description Symbol Min Max Unit Notes
tSKEW - 350 + 350 ps 85MHz > Fclk 65MHz
LVDS Clock to Data Skew Margin
tSKEW - 600 + 600 ps 65MHz > Fclk 25MHz
LVDS Clock to Clock Skew Margin (Even
tSKEW_EO - 1/7 + 1/7 Tclk -
to Odd)
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LM230WF8
Liquid Crystal Display
Product Specification
tSKEW_EO
LVDS Odd Clock
Tclk
LVDS Even Clock
Tclk
LVDS Even Data
< Clock skew margin between channel >
3-3-3. LVDS Data format
Tclk
Tclk * 4/7 Tclk * 3/7
RCLK +
Tclk * 1/7 MSB R7
R6
RXinO0 +/- OR3 OR2 OR1 OR0 OG0 OR5 OR4 OR3 OR2 OR1 OR0 OG0 OR5 OR4
R5
RXinO1 +/- OG4 OG3 OG2 OG1 OB1 OB0 OG5 OG4 OG3 OG2 OG1 OB1 OB0 OG5 R4
R3
RXinO2 +/- OB5 OB4 OB3 OB2 DE VSYNC HSYNC OB5 OB4 OB3 OB2 DE VSYNC HSYNC
R2
RXinO3 +/- OG7 OG6 OR7 OR6 X OB7 OB6 OG7 OG6 OR7 OR6 X OB7 OB6 R1
LSB R0
RXinE 0 +/- ER3 ER2 ER1 ER0 EG0 ER5 ER4 ER3 ER2 ER1 ER0 EG0 ER5 ER4
* ODD = 1st Pixel
EG4 EG3 EG2 EG1 EB1 EB0 EG5 EG4 EG3 EG2 EG1 EB1 EB0 EG5 EVEN = 2nd Pixel
RXinE 1 +/-
RXinE 2 +/- EB5 EB4 EB3 EB2 DE VSYNC HSYNC EB5 EB4 EB3 EB2 DE VSYNC HSYNC
RXinE 3 +/- EG7 EG6 ER7 ER6 X EB7 EB6 EG7 EG6 ER7 ER6 X EB7 EB6
Previous (N - th Cycle
1) Current (Nth) Cycle Next (N+1) th Cycle
< LVDS Data Format >
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LM230WF8
Liquid Crystal Display
Product Specification
Table 6. Required signal assignment for Flat Link(NS:DS90CF383) transmitter
Pin # Pin Name Require Signal Pin # Pin Name Require Signal
1 VCC Power Supply for TTL Input 29 GND Ground pin for TTL
2 D5 TTL Input (R7) 30 D26 TTL Input (DE)
3 D6 TTL Input (R5) 31 TX CLKIN TTL Level clock Input
4 D7 TTL Input (G0) 32 PWR DWN Power Down Input
5 GND Ground pin for TTL 33 PLL GND Ground pin for PLL
6 D8 TTL Input (G1) 34 PLL VCC Power Supply for PLL
7 D9 TTL Input (G2) 35 PLL GND Ground pin for PLL
8 D10 TTL Input (G6) 36 LVDS GND Ground pin for LVDS
9 VCC Power Supply for TTL Input 37 TxOUT3 Positive LVDS differential data output 3
10 D11 TTL Input (G7) 38 TxOUT3 Negative LVDS differential data output 3
11 D12 TTL Input (G3) 39 TX CLKOUT Positive LVDS differential clock output
12 D13 TTL Input (G4) 40 TX CLKOUT Negative LVDS differential clock output
13 GND Ground pin for TTL 41 TX OUT2 Positive LVDS differential data output 2
14 D14 TTL Input (G5) 42 TX OUT2 Negative LVDS differential data output 2
15 D15 TTL Input (B0) 43 LVDS GND Ground pin for LVDS
16 D16 TTL Input (B6) 44 LVDS VCC Power Supply for LVDS
17 VCC Power Supply for TTL Input 45 TX OUT1 Positive LVDS differential data output 1
18 D17 TTL Input (B7) 46 TX OUT1 Negative LVDS differential data output 1
19 D18 TTL Input (B1) 47 TX OUT0 Positive LVDS differential data output 0
20 D19 TTL Input (B2) 48 TX OUT0 Negative LVDS differential data output 0
21 GND Ground pin for TTL Input 49 LVDS GND Ground pin for LVDS
22 D20 TTL Input (B3) 50 D27 TTL Input (R6)
23 D21 TTL Input (B4) 51 D0 TTL Input (R0)
24 D22 TTL Input (B5) 52 D1 TTL Input (R1)
25 D23 TTL Input (RSVD) 53 GND Ground pin for TTL
26 VCC Power Supply for TTL Input 54 D2 TTL Input (R2)
27 D24 TTL Input (HSYNC) 55 D3 TTL Input (R3)
28 D25 TTL Input (VSYNC) 56 D4 TTL Input (R4)
Notes : 1. Refer to LVDS Transmitter Data Sheet for detail descriptions.
2. 7 means MSB and 0 means LSB at R,G,B pixel data
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LM230WF8
Liquid Crystal Display
Product Specification
3-4. Signal timing specifications
This is the signal timing required at the input of the User connector. All of the interface signal
timing should be satisfied with the following specifications for it's proper operation.
Table 7. Timing table
Note: Hsync period and Hsync width-active should be even number times of tCLK. If the value is odd number
times of tCLK, display control signal can be asynchronous. In order to operate this LCM a Hsync,
Vsyn, and DE(data enable) signals should be used.
1. The performance of the electro-optical characteristics may be influenced by variance of the vertical
refresh rates.
2. Vsync and Hsync should be keep the above specification.
3. Hsync Period, Hsync Width, and Horizontal Back Porch should be any times of of character
number(4).
4. The polarity of Hsync, Vsync is not restricted.
5. The Max frequency of 1920X1080 resolution is 82.5Mhz
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LM230WF8
Liquid Crystal Display
Product Specification
3-5. Signal timing waveforms
1. DCLK , DE, DATA waveforms
tCLK
Clk
tad thud Valid
Invalid Invalid
Data
tsar this
DE(Data Enable)
2. Horizontal waveform
th
tHV
DE(Data Enable) DE
3. Vertical waveform
top
tVV
DE(Data Enable) DE
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LM230WF8
Liquid Crystal Display
Product Specification
3-6. Color input data reference
The brightness of each primary color (red,green and blue) is based on the 8bit 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 8. 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) Dark 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(002) 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
--------- - - - - - - - - - - - - - - - - - - - - - - - -
Red --------- - - - - - - - - - - - - - - - - - - - - - - - -
Red(253) 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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) Bright 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) Dark 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(002) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
--------- - - - - - - - - - - - - - - - - - - - - - - - -
Green - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - -
Green(253) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0
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)Bright 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) Dark 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(002) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
--------- - - - - - - - - - - - - - - - - - - - - - - - -
Blue --------- - - - - - - - - - - - - - - - - - - - - - - - -
Blue(253) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1
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) Bright 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
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LM230WF8
Liquid Crystal Display
Product Specification
3-7. Power sequence
90% 90%
VLCD 10% 10%
Power Supply For LCD
T1 T2 T5 T7
Valid data
Interface Signal (Tx)
0V
T3 T4
LED on
Power Supply for LED OFF OFF
Table 9. Power sequence
Values
Parameter Units
Min Typ Max
T1 0.5 - 10 ms
T2 0.01 - 50 ms
T3 500 - - ms
T4 200 - - ms
T5 0.01 - 50 ms
T7 1 - - s
Notes :
1. Please VLCD power on only after connecting interface cable to LCD.
2. Please avoid floating state of interface signal at invalid period.
3. When the interface signal is invalid, be sure to pull down the power supply for
LCD VLCD to 0V.
4. LED power must be turn on after power supply for LCD an interface signal are valid.
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3-8. VLCD Power dip condition
FIG. 6 Power dip condition
VLCD
4.5V
3.5V
GND (ground)
td
1) Dip condition
3.5V VLCD 4.5V , td20ms
2) VLCD 3.5V
VLCD-dip conditions should also follow the Power On/Off conditions for supply voltage.
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Liquid Crystal Display
Product Specification
4. Optical specification
Optical characteristics are determined after the unit has been `ON' for 30 minutes in a dark environment at
25 C. The values specified are at an approximate distance 50cm from the LCD surface at a viewing angle of
) and T equal to 0 .
FIG. 7 presents additional information concerning the measurement equipment and method.
FIG. 7 Optical characteristic measurement equipment and method
LCD Module
Optical Stage(x,y)
Pritchard 880 or
equivalent
50cm
Table 10. Optical characteristics Ta= 25 C, VLCD=5.0V, fV=60Hz fCLK=119MHz, IBL = 110mA
Values
Parameter Symbol Units Notes
Min Typ Max
Contrast Ratio CR 700 1000 - 1
Surface Luminance, white LWH 200 250 - cd/m2 2
Luminance Variation G WHITE 9P 75 % 3
Rise Time TrR - 1.3 2.6 ms 4
Response Time
Decay Time TrD - 3.7 7.4 ms 4
Rx
RED
Ry
Gx
GREEN
Color Coordinates Gy Typ Typ
[CIE1931] Bx -0.03 +0.03
BLUE
By
Wx 0.313
WHITE
Wy 0.329
Color Gamut - - 72 - %
Viewing Angle (CR>5)
x axis, right(I=0 ) Tr 75 88 Degree 5
x axis, left (I=180 ) Tl 75 88
y axis, up (I=90 ) Tu 70 85
y axis, down (I=270 ) Td 70 85
Viewing Angle (CR>10)
x axis, right(I=0 ) Tr 70 85 Degree 5
x axis, left (I=180 ) Tl 70 85
y axis, up (I=90 ) Tu 60 75
y axis, down (I=270 ) Td 70 85
3D Viewing Angle (3DCT < 10%) 12 Degree 5
Crosstalk 1.5 % 6
3D Crosstalk (min.) 1.8 5.0 % 5
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LM230WF8
Liquid Crystal Display
Product Specification
Notes :
1. Contrast ratio(CR) is defined mathematically as :It is measured at center point(1)
Surface luminance with all white pixels
Contrast ratio =
Surface luminance with all black pixels
2. Surface luminance is the luminance value at center 1 point(1) across
the LCD surface 50cm from the surface with all pixels displaying white.
For more information see FIG 8.
3. The variation in surface luminance , G WHITE is defined as
Minimum (P1,P2 .....P9)
G WHITE = --------------------------------------------- *100
Maximum (P1,P2 .....P9)
For more information see Figure 8.
FIG. 8 Luminance measuring point
H
H
H/2 H/10
H/2
2 3 4
V/2 V/2
V 5 6 V
1
V/10 7 8 9
Active Area H : 509.184 mm
V : 286.416 mm
@ H,V : Active Area
Ver. 0.1 Apr. 25. 2011 20 / 32
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LM230WF8
Liquid Crystal Display
Product Specification
Notes :
4. Response time is the time required for the display to transition from black to white
(Decay Time, TrD) and from white to black (Rise Time, TrR)
The sampling rate is 2,500 sample/sec. For additional information see FIG. 9.
The response time is defined as the following figure and shall be measured by
switching the input signal for each gray to gray.
FIG. 9 Response time
TrR TrD
100
90
Optical
white black white
response
[%] 10
0
5. Viewing angle is the angle at which the contrast ratio is greater than 10 or 5. The angles are
determined for the horizontal or x axis and the vertical or y axis with respect to the z axis
which is normal to the LCD surface. For more information see FIG. 10 .
FIG. 10 Viewing angle
Normal
E Y
I = 90 q, Up
I = 180 q, Left
T
I
I = 0 q, Right
I = 270 q, Down
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LM230WF8
Liquid Crystal Display
Product Specification
In order to measure 3D viewing angle (distance 50cm), it need to be prepared as below;
1) Measurement configuration
4-Test pattern images. Refer to FIG 8.
-. RW-LW : White for right and left eye
-. RW-LB : White for right eye and Black for left eye
-. RB-LW : Black for right eye and white for left eye
-. RB-LB : Black for right eye and left eye
Image files where black and white lines are displayed on even or odd lines.
Luminance measurement system (LMS) with narrow FOV (field of view) is used. Refer to FIG 1.
2) Positioning Eyeglass
Find angle of minimum transmittance.
This value would be provided beforehand or measured by the following steps;
(i) Test image (RB-LW) is displayed.
(ii) Right eyeglass are placed in front of LMS and luminance is measured,
rotating right eyeglass such as FIG 7. The notation for luminance measurement is "Lum(RE, RB-LW,1)".
(iii) Find the angle where luminance is minimum.
* Following measurements should be performed at the angle of minimum transmittance of eyeglass.
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LM230WF8
Liquid Crystal Display
Product Specification
3) 3D cross talk and 3D viewing angle
(i) Test image ( RB-LW, RW-LB and RB-LB ) is displayed.
(ii) Right or left eyeglass are placed in front of LMS successively and
luminance is measured for position 1 ( position 2,3 : optional )
with rotating LMS or sample vertically. ( horizontal: optional )
The value of 3D cross talk is
Lum(LE, RW-LB,1) - Lum(LE, RB-LB,1)
Lum(LE, RB-LW,1) - Lum(LE, RB-LB,1)
or
Lum(RE, RB-LW,1) - Lum(RE, RB-LB,1)
Lum(RE, RW-LB,1) - Lum(RE, RB-LB,1)
The 3D crosstalk (min.) is minimum 3D crosstalk within viewing angle.
3D perceiving angular range, or 3D viewing angle, is defined as angular range
that 3D crosstalk is below 10%.
The typical center of U/D viewing angle is 2