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LM270WF5
Liquid Crystal Display
Product Specification
1. General Description
LM270WF5-SLM1 is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (White LED)
backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type disp
lay operating in the normally black mode. It has a 27 inch diagonally measured active display area with Full HD re
solution (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(Fra
me Rate Control). It has been designed to apply the interface method that enables low power, high speed, low EM
I. FPD Link or compatible must be used as a LVDS(Low Voltage Differential Signaling) chip. It is intended to suppo
rt applications where thin thickness, wide viewing angle, low power are critical factors and graphic displays are im
portant. It is intended to support displays where high brightness, super wide viewing angle,
high color saturation, and high color are important.
RGB, Dclk, DE
Hsync, Vsync
(LVDS 2 port)
(5.0V)
V
LCD
CN1
(30pin)
Timing Control
Block
Power Circuit Block
General Features
V
LED (3ch)
Figure 1. Block diagram
Back light System (White LED)
Active Screen Size 27 inches(68.6cm) diagonal
Outline Dimension 630.0(H) x 368.2(V) x 11.7(D) mm(Typ.)
Pixel Pitch 0.3114 mm x 0.3114 mm
G1
TFT-LCD Panel
(1920 × 1080 pixels)
G1080
S1
Source Driver Circuit
S1920
Pixel Format 1920 horiz. By 1080 vert. Pixels RGB stripes arrangement
Power Consumption Total 19.7 Watt (Typ.) (4.1 Watt
@ VLCD, 15.6 Watt @250cd/)
Weight 3,150 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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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
LM270WF5
Liquid Crystal Display
Parameter Symbol
Units Notes
Min Max
Values
Power Supply Input Voltage V
Operating Temperature T
Storage Temperature T
Operating Ambient Humidity H
Storage Humidity H
LCM Surface Temperature
(Operation)
T
LCD
OP
ST
OP
ST
surface
-0.3 +5.5 Vdc At 25
0 50 °C
-20 60 °C
10 90 %RH
10 90 %RH
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
1,2,,3
60
50
Wet Bulb
Temperature []
40
30
20
10
0
10 20 30 40 50 60 70 80 0 -20
Dry Bulb Temperature []
Ver 1.0 Oct. 17. 2012
90%
60%
40%
10%
Storage
Operation
Humidity [(%)RH]
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LM270WF5
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 l
iquid 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
Rush current I
LCD
c TYP
P
c MAX
P
RUSH
LCD
dRF
Min Typ Max
4.5 5 5.5
- 820 1025
- 1178 1473
- 4.1 5.1
- 5.9 7. 4
- 3
Values
400
Unit Notes
Vdc
mVp-p 1
mA 2
mA 3
Watt 2
Watt 3
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 ± 20%.(min.).
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LM270WF5
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 & Green Pattern for power consumption measurement
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Product Specification
Table 2-2. LED Bar ELECTRICAL CHARACTERISTICS
LM270WF5
Liquid Crystal Display
Parameter Symbol
LED String Current Is - 120 130 mA 1, 2, 5
LED String Voltage Vs 40.6 43.4 46.2 V 1, 5
Power Consumption
LED Life Time LED_LT 30,000 - - Hrs 3
PBar - 15.6 16.6 Watt 1, 2, 4
Min. Typ. Max.
Values
Unit Notes
Notes) The LED Bar consists of 42 LED packages, 3 strings (parallel) x 14 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 ± 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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