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Product Description: T315HW03 TFT-LCD PANEL
AUO Model Name: T315HW03 V0
Customer Part No. / Project Name:
Customer Signature AU Optronics Corp.
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Note
Approved by: PM Head / Frank Hsu
Reviewed by: RD Head / Eugene Chen
Reviewed by: Project Leader / Jimson
Jeng
Prepared by: PM / Alex Wang
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Document Version: 1.2
Date:2009/09/30
Product Functional Specification
32” Full-HD Color TFT-LCD Module
Model Name: T315HW03 V0
() Preliminary Specification
(*) Final Specification
Note : This specification is subject to change without notice.
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COVER
CONTENTS
RECORD OF REVISIONS
GENERAL DESCRIPTION 1
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Contents
ITEM No
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL SPECIFICATIONS 3
ELECTRICAL CHARACTREISTICS 3-1
INTERFACE CONNECTIONS 3-2
SIGNAL TIMING SPECIFICATIONS 3-3
SIGNAL TIMING WAVEFORMS 3-4
COLOR INPUT DATA REFERNECE 3-5
POWER SEQUENCE 3-6
OPTICAL SPECIFICATIONS 4
MECHANICAL CHARACTERISTICS 5
RELIABILITY 6
7
8
INTERNATIONAL STANDARDS
SAFETY 7-1
EMC 7-2
PACK IN G
PRECAUTIONS 9
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Record of Revision
Version Date Page Old Description New Description Remark
1.0 2009/06/15 Fianl spec first release
1.1 2009/08/14
p35~p38
p31
Application Note
Update Cell Protect sheet
information
1.2 2009/09/30
2009/09/30
P20
P30
P30
P30
P30~38
24V(typ) 28V(typ)
Update shipping label
Update carton label
Update shipping label
Update application note
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1. General Description
This specification applies to the 32 inch Color TFT-LCD Module T315HW03 V0. This LCD module has
a TFT active matrix type liquid crystal panel 1920x1080 pixels, and diagonal size of 32 inch. This
module supports 1920x1080 Full-HD mode (Non-interlace).
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+FRC gray scale signal for
each dot.
The T315HW03 V0 has been designed to apply the 10-bit 4 channel LVDS interface method. It is
intended to support displays where high brightness, wide viewing angle, high color saturation, and
high color depth.
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*
General Information
Items Specification Unit Note
Active Screen Size 31.5 inches
Display Area 698.4 (H) x 392.85 (V) mm
Outline Dimension 772.4(H) x 496.1(V) x 7.8(D) mm Without driver board
& boss
Driver Element a-Si TFT active matrix
Display Colors 8bit+FRC Colors
Number of Pixels 1920 x 1080 Pixel
Pixel Pitch 0.36375 mm
Pixel Arrangement RGB vertical stripe
Display Mode Normally Black
Lamp quantity, type LED 228 pcs
Surface Treatment AG, 3H
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2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the
unit.
Item Symbol Min Max Unit Conditions
Logic/LCD Drive Voltage Vcc -0.3 14 [Volt] Note 1
Input Voltage of Signal Vin -0.3 3.6 [Volt] Note 1
BLU Input Voltage VDDB -0.3 32 [Volt] Note 1
BLU Brightness Control Voltage Vdim -0.3 7.0 [Volt] Note 1
Operating Temperature TOP 0 +50 [oC] Note 2
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Operating Humidity HOP 10 90 [%RH] Note 2
Storage Temperature TST -20 +60 [oC] Note 2
Storage Humidity HST 10 90 [%RH] Note 2
Panel Surface Temperature PST 65 [oC] Note 3
Note 1: Duration:50 msec.
Note 2 : Maximum Wet-Bulb should be 39 and No condensation.к
The relative humidity must not exceed 90% non-condensing at temperatures of 40 or less. At temperatures к
greater than 40 , the wet bulb temperature must not exceed 39 . кк
Note 3: Surface temperature is measured at 50к Dry condition
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V
s
3. Electrical Specification
The T315HW03 requires two power inputs. One is employed to power the LCD electronics and to drive
the TFT array and liquid crystal. The second input, which powers the LED, is typically generated by an
driver board.
3-1 Electrical Characteristics
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Values Parameter Symbol
Unit Notes
Min Typ Max
LCD:
Power Supply Input Voltage Vdd 10.8 12 13.2 Vdc
Power Supply Input Current Idd - 0.6 0.66 A 1
Power Consumption Pc - 7.2 Watt 1
Inrush Current I
LVDS
Interface
Differential Input
High Threshold
- - 4.5 A 5
RUSH
TH
+100 mV
V
4
oltage
Differential Input
Low Threshold
TL
-100 mV
V
4
Voltage
CIM
Common Input
0.6 1.2 1.8 V
V
Voltage
CMOS
Input High
V
IH
2.0 3.3 Vdc
Interface
Threshold Voltage
Input Low
Threshold Voltage
Backlight Power Consumption
(High)
V
IL
0 0.8 Vdc
(Low)
100 Watt 2
Life Time 30000 Hours 3
The relative humidity must not exceed 80% non-condensing at temperatures of 40к or less. At
temperatures greater than 40к, the wet bulb temperature must not exceed 39к. When operate
at low temperatures, the brightness of LED will drop and the lifetime of LED will be reduced.
Note :
1. Vdd=12.0V, fv=120 Hz, f
=80 Mhz , 25к, Vdd Duration time= 470
μ
, Test pattern : white
CLK
pattern
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s
2. The Backlight power consumption shown above does include loss of external converter at 25
к. The used LED current is the LED typical current, Operating condition : ILED=120 mA,
Duty=100%
3. The life is determined as the time at which luminance of the lamp is 50% compared to that of
initial value at the typical lamp current on condition of continuous operating at 252к.
4. VCIM = 1.2V
VTH
VCIM
VTL
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0V
Figure : LVDS Differential Voltage
5. Measurement Condition: Rising time = 470Ӵs
Vdd
GND
0.1 Vdd
470
0.9 Vdd
μ
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3-2 Interface Connections
LCD connector 1 : 187059-5122 (P-TWO INDUSTRIES INC.)
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LCD connector 2 : 187060-4122 (P-TWO INDUSTRIES INC.)ʳ
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Note: 1. All GND (ground) pin should be connected together to the LCD module’s metal frame.
2. All V
( power input ) pins should be connected.
LCD
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LVDS Option = HighJEIDA
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LVDS Option = Low/OpenNS
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Backlight Connector Pin Configuration
1. Electrical specification
No ITEM SYMBOL CONDITION MIN TYP MAX UNIT Note
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1 Input Voltage V
2 Input Current I
3 Input Power P
4 Input inrush current I
ON/OFF Control
5
Voltage
V
BLON
ON/OFF Control
6
Current
External PWM
7
EV
PWM
Control Voltage
External PWM
8
EI
PW M
Control Current
External PWM Duty
9
ED
Ratio
--- 25.2 28.0 30.8 V
DDB
DDB
V
=24V
DDB
3.4 3.57 3.75 A
DC
DC
100% Brightness
V
=24V
DDB
DDB
95 100 105 W
100% Brightness
V
=24V
RUSH
DDB
--- --- 6 A
DC
100% Brightness
ON V
OFF V
I
V
BLON
MAX --- 2.0 --- 3.3 V
MIN --- 0 --- 0.8 V
MAX PWM=100% 0 --- 2 mA
MIN PWM=30% 0 --- 2 mA
--- 5* --- 100 %
PWM
=24V 2.0 --- 3.3 V
DDB
=24V 0.0 --- 0.8 V
DDB
=24V 0 --- 2 mA
DDB
DC
DC
DC
DC
DC
DC
DC
External PWM
10
EF
PWM
Frequency
Internal PWM
11
IV
PW M
Control Voltage
* Note : At
ˏʳ
ˏʳ
20% dimming ratio, AUO would not guarantee display performance & start at High
ˏʳˏʳ
and Low Temperature condition.
--- 140 180 240 Hz
V
=24V 0 --- 3.3 V
DDB
ΰTa =2 55к, Turn on for 45minutesα
DC
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2. Input specification
Connector 2: JST_PA type connector (side entry type) or equivalent
Pin No Symbol Description
1 VDDB Operating Voltage Supply, +28V DC regulated
2 VDDB Operating Voltage Supply, +28V DC regulated
3 GND Ground and Current Return
4 GND Ground and Current Return
5 ON/OFF
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BL On/Off control signal High: On, Low/open: Off
Low=0~ 0.8V, High=2.0~5.0V)
External PWM (AC 0~3.3V, Duty: 5%~100%)
6 Dimming
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3-3 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.
Timing Table (DE only Mode)
Vertical Frequency Range A (120Hz)
Signal Item Symbol Min Type Max Unit
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Period Tv 1096 1130 1160 Th
Active Tdisp (v) 1080 Th
Vertical Section
Horizontal Section
Clock
Vertical Frequency Frequency Vs 118 120 122 Hz
Horizontal Frequency Frequency Hs 131.52 135.6 139.2 KHz
Vertical Frequency Range B (100Hz)
Signal Item Symbol Min Type Max Unit
Vertical Section
Blanking Tblk (v) 16 50ʳ 80 Th
Period Th 560 570ʳ 580 Tclk
Active Tdisp (h) 480 Tclk
Blanking Tblk (h) 80 90ʳ 100 Tclk
Period CLK 12.94 ns
Frequency Freq 73.65 77.29 80.74 MHz
Period Tv 1200 1280 1392 Th
Active Tdisp (v) 1080 Th
Blanking Tblk (v) 120 200ʳ 312 Th
Period Th 560 570 580 Tclk
Horizontal Section
Clock
Vertical Frequency Frequency Vs 96 100 102 Hz
Horizontal Frequency Frequency Hs 120 ʳ 128 139.2 KHz
Note :
1. Vertical Frequency Range A : Vs Max = 124 is accepted
2. Vertical Frequency Range B : Vs Max = 104 is accepted
3. Vertical Frequency Range B : Vs Min = 94 is accepted
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Active Tdisp (h) 480 Tclk
Blanking Tblk (h) 80 ʳ 90 100 Tclk
Period CLK 13.71 ns
Frequency Freq 67.2 72.96 80.74 MHz
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©Copyright AU Optronics, Inc.
3
Pixel
1
Pixel
Invalid Data
N
Line
M-1
Pixel
M-3
Pixel
M-5
Pixel
4
Line
11
Pixel
Tdisp(v)Tblk (v)
3
Line
Th
Tdisp (h) Tblk (h)
9
Pixel
7
Pixel
4
Pixel
2
Pixel
Invalid Data
M
Pixel
M-2
Pixel
M-4
Pixel
12
Pixel
10
Pixel
8
Pixel
5
2
Tv
Th
DE
Line
1
Line
Invalid Data Invalid Data
Tclk
N
Line
Data
RGB
CLK
DE
Pixel
3
Pixel
1
Pixel
Invalid Data
M-1
Pixel
M-3
Pixel
M-5
Pixel
M-7
Pixel
(odd)
RGB Data
6
Pixel
4
Pixel
2
Pixel
Invalid Data
M
Pixel
M-2
Pixel
M-4
Pixel
M-6
Pixel
(even)
RGB Data
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3-4 Signal Timing Waveforms
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3-5 Color Input Data Reference
The brightness of each primary color (red, green and blue) is based on the 10 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.
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3-6 Power Sequence
1. Power sequence of panel
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Values
Parameter
t1 0.4 - 30 ms
t2 0.1 - 50 ms
t3 300 - - ms
t4 10 - - ms
t5 0.1 - 50 ms
t6 - - 300 ms
t7 500 - - ms
Apply the lamp voltage within the LCD operating range. When the backlight turns on before the LCD
operation or the LCD turns off before the backlight turns off, the display may momentarily become
abnormal.
Caution :
case of handling, make sure to turn off the power when you plug the cable into the input connector or
pull the cable out of the connector.
The above on/off sequence should be applied to avoid abnormal function in the display. In
Min. Typ. Max.
Units
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yp
2. Power sequence of driver board
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28V(t
Values Parameter
Min. Typ. Max.
T1 20 - - ms
T2 10 - - ms
T3 10 - - ms
T4 0 - - ms
T5 1 - - ms
T6 - - - ms
Driver board
Units
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4. Optical Specification
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 60
minutes in a dark environment at 25к. The values specified are at an approximate distance 50cm
from the LCD surface at a viewing angle of ӥ and Ӱequal to 0.
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SR3 or equivalent
Fig.4-1 Optical measurement equipment and method
Parameter
Symbol
Values
Units Notes
Min. Typ. Max.
Contrast Ratio CR 4000 1
Surface Luminance, white LWH 280 450
Luminance Variation
Response Time (G to G)
Ӭ
WHITE
5p 1.3 3
Tӫ
(6.5) ms 4
cd/ф
2
Color Coordinates
RED RX 0.653
R
0.327
Y
GREEN GX 0.267
G
0.625
Y
Typ.-0.05
Typ.+0.05
BLUE BX 0.147
B
0.061
Y
WHITE WX 0.280
W
Y
0.290
Viewing Angle Contrast Ratio>10
x axis, right(ӽ=0) Ӱ
x axis, left(ӽ=180) Ӱ
y axis, up(ӽ=90) Ӱ
y axis, down (ӽ=0) Ӱ
r
l
u
d
89 Degree 6
89
89
89
Note for Optics Spec :
JVC consider that min surface luminance is 360nits, min color coordinates is typ. – 0.04, and max
color coordinates is typ. + 0.04. AUO and JVC will keep monitor LED performance.
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Note:
1. Contrast Ratio (CR) is defined mathematically as:
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Contrast ratio (CR)=
Brightness on the "white" state
Brightness on the "black" state
2. Surface luminance is luminance value at point 5 across the LCD surface 50cm from the surface with
DDB
all pixels displaying white. From more information see Fig. 4-2. When V
L
WH=Lon5
, Where L
is the luminance with all pixels displaying white at center 5 location.
on1
V/2
V/6
123
456
78
= 28V, I
H
DDB
= 3.57A.
V
9
H/2 H/6
Fig.4-2 Optical measurement point
3. The variation in surface luminance, Ӭ
δ
WHITE(9P)
= Maximum(L
is defined under 100% brightness as:
WHITE
, L
on1
on2
,…,L
)/Minimum(L
on9
on1
, L
on2
,…L
on9
)
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4. Response Time:
(a) G-to-G: average response time among brightness of 0%, 25%, 50%, 75% &100%.
0% 25% 50% 75% 100%
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0%
25%
50%
75%
100%
tr: 0%25% tr: 0%50% tr: 0%75% tr: 0%100%
tf: 25%0% tr: 25%50% tr: 25%75% tr: 25%100%
tf: 50%0% tf: 50%25% tr: 50%75% tr: 50%100%
tf: 75%0% tf: 75%25% tf: 75%50% tr: 75%100%
tf: 100%0% tf: 100%25% tf: 100%50% tf: 100%75%
5. Viewing angle is the angle at which the contrast ratio is greater than 10. 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. 4-3. (Optical measurement by SR3)
Fig.4-3 Viewing Angle Definition
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5. Mechanical Characteristics
The contents provide general mechanical characteristics for the model T315HW03 V0. In addition the
figures in the next page are detailed mechanical drawing of the LCD.
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Horizontal (typ.) 772.4mm
Outline Dimension
Active Display Area
Weight 4595g (typ)(without T-con cover & driver board cover)
Surface Treatment Anti-Glare coating (Haze 11%)
Vertical (typ.) 496.1mm
Depth (typ.) 7.8mm (without driver board &
Horizontal (typ.) 703.4mm Bezel Area
Vertical (typ.) 398.6mm
Horizontal 698.4mm
Vertical 392.85mm
Hard coating (3H)
boss)
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2D drawing
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6. Reliability
Panel condition in RA test
Brightness: 450nits
No Test Item Condition
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1 High temperature storage test
2 Low temperature storage test
3 High temperature operation test
4 Low temperature operation test
7 Vibration test
(with carton)
8 Drop test (TBD)
(with carton)
(refer to below table)
Step TEST ITEM
Ԙ Drop
ԙ Drop
Bottom
Front-Bottom
face
edge line
Ta =6 0к 300h
Ta= -2 0 к 300h
Ta =5 0к 300h
Ta =- 5 к 300h
Wave form: random
Vibration level: 1.5G RMS
Bandwidth: 10-200Hz,
Duration: X, Y, Z 30min
One time each direction
Height: 38.1cm
1 corner, 3 edges, 6 surfaces
(ASTMD4169-I)
Height (cm)
JVC and AUO Spec. combination
38.1
38.1
Ԛ Drop
ԛ Drop
Ԝ Drop
ԝ Drop
Ԟ Over Turning Front N/A
ԟ Over Turning Back N/A
Ԡ Over Turning Front N/A
ԡ Over Turning Back N/A
ԢʳDrop
ԣʳDrop
Result Evaluation Criteria
There should be no change which might affect the practical display function when the display quality test is
conducted under normal operating condition.
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Rear-Bottom
Right-Bottom
Left-Bottom
Front-Bottom
Bottom
Bottom
face
face
edge line
edge line
edge line
edge line
ʳ
ʳ
38.1
38.1
38.1
38.1
30
30
ʳ
ʳ
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7. International Standard
7-1. Safety
(1) UL 60950-1, UL 60065
Standard for Safety of Information Technology Equipment Including electrical Business
Equipment.
(2) IEC 60950-1 : 2001, IEC 60065:2001
Standard for Safety of International Electrotechnical Commission
(3) EN 60950 : 2001+A11, EN 60065:2002+A1:2006
European Committee for Electrotechnical Standardization (CENELEC)
EUROPEAN STANDARD for Safety of Information Technology Equipment Including Electrical
Business Equipment.
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7-2. EMC
(1) ANSI C63.4 “Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and
Electrical Equipment in the Range of 9kHz to 40GHz. “American National standards
Institute(ANSI), 1992
(2) C.I.S.P.R “Limits and Methods of Measurement of Radio Interface Characteristics of Information
Technology Equipment.” International Special committee on Radio Interference.
(3) EN 55022 “Limits and Methods of Measurement of Radio Interface Characteristics of Information
Technology Equipment.” European Committee for Electrotechnical Standardization. (CENELEC),
1998
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V
V
W
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8.Packing
Packing Instruction
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Package information:
Carton outside dimension : 870x283x598mm
Carton/Package weight : 4.5kg
Shipping label
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Carton label
5
Green Mark Description:
For Pb Free products, AUO will add for identification.
For RoHS compatible products, AUO will add
Note:
The Green Mark will be present only when the green documents have been ready by AUO
Internal Green Team. (The definition of green design follows the AUO green design checklist.)
for identification.
Pallet information
By air cargo : : (4x1) x2 layers, one pallet put 8 boxes, total 24 pcs module.
By sea : (4x1) x2 layers, one pallet put 24 boxes, total 24 pcs module
Pallet dimension : 1150x910x132mm
Pallet weight : 12kg
By air total weight : 31.5 kg/box X 8 boxes=252 kg (with pallet weight 264kg)
By sea total weight : 31.5 kg/box X 8 boxes=252 kg (with pallet weight 264kg)
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Made in XXXX
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Stretch film
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Moisture-proof filmCorner angle
Label
Cell protection sheet and corner tape
PET band
Corner angle
Pallet
TAPE FILM PROTECT (PET TAPE)
Qty: 0.08m*4
Taping SOP (reference the above figure)
1. 0.08m*4 preparation
2. Rotating tape to 45 degree sticking o the corner.
Note :
AUO keep studying optimized packing design, so far, the panel packing solution as below
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9.PRECAUTIONS
Please pay attention to the followings when you use this TFT LCD module.
9-1 MOUNTING PRECAUTIONS
(1) You must mount a module using holes arranged on back side of panel.
(2) Please attach the surface transparent protective plate to the surface in order to protect the
polarizer. Transparent protective plate should have sufficient strength in order to the resist
external force.
(3) You should adopt radiation structure to satisfy the temperature specification.
(4) Acetic acid type and chlorine type materials for the cover case are not desirable because the
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former generates corrosive gas of attacking the polarizer at high temperature and the latter
causes circuit break by electro-chemical reaction.
(5) Do not touch, push or rub the exposed polarizers with glass, tweezers or anything harder than
HB pencil lead. And please do not rub with dust clothes with chemical treatment. Do not touch
the surface of polarizer for bare hand or greasy cloth. (Some cosmetics are detrimental to the
polarizer.)
(6) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft
materials like chamois soaks with petroleum benzene. Normal-hexane is recommended for
cleaning the adhesives used to attach front/ rear polarizers. Do not use acetone, toluene and
alcohol because they cause chemical damage to the polarizer.
(7) Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer
causes deformations and color fading.
(8) Do not open the case because inside circuits do not have sufficient strength.
9-2 OPERATING PRECAUTIONS
(1) The spike noise causes the mis-operation of circuits. It should be lower than following voltage:
V=200mV(Over and under shoot voltage)
(2) Response time depends on the temperature. (In lower temperature, it becomes longer..)
(3) Brightness depends on the temperature. (In lower temperature, it becomes lower.) And in
lower temperature, response time (required time that brightness is stable after turned on)
becomes longer.
(4) Be careful for condensation at sudden temperature change. Condensation makes damage to
polarizer or electrical contacted parts. And after fading condensation, smear or spot will occur.
(5) When fixed patterns are displayed for a long time, remnant image is likely to occur.
(6) Module has high frequency circuits. Sufficient suppression to the electromagnetic interference
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shall be done by system manufacturers. Grounding and shielding methods may be important
to minimize the interface.
9-3 ELECTROSTATIC DISCHARGE CONTROL
Since a module is composed of electronic circuits, it is not strong to electrostatic discharge. Make
certain that treatment persons are connected to ground through wrist band etc. And don’t touch
interface pin directly.
9-4 PRECAUTIONS FOR STRONG LIGHT EXPOSURE
Strong light exposure causes degradation of polarizer and color filter.
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9-5 STORAGE
When storing modules as spares for a long time, the following precautions are necessary.
(1) Store them in a dark place. Do not expose the module to sunlight or fluorescent light. Keep the
temperature between 5к and 35к at normal humidity.
(2) The polarizer surface should not come in contact with any other object. It is recommended that
they be stored in the container in which they were shipped.
9-6 HANDLING PRECAUTIONS FOR PROTECTION FILM
(1) The protection film is attached to the bezel with a small masking tape. When the protection film
is peeled off, static electricity is generated between the film and polarizer. This should be
peeled off slowly and carefully by people who are electrically grounded and with well ion-blown
equipment or in such a condition, etc.
(2) When the module with protection film attached is stored for a long time, sometimes there
remains a very small amount of flue still on the Bezel after the protection film is peeled off.
(3) You can remove the glue easily. When the glue remains on the Bezel or its vestige is
recognized, please wipe them off with absorbent cotton waste or other soft material like
chamois soaked with normal-hexane.
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Application Note :
Prevent ”Image Sticking” Problem
In using a TFT LCD for a commercial machine (such as POS or PID) or an
industrial automation application, it is often that the application software requires a
fixed screen pattern, icons or buttons (see example as below) to be presented on
the screen for a long period of time.
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Figure 1. Example image of POS screen
When the LCD panels run under such condition, a phenomenon called “image
sticking” or “ghost image” will sometime be seen when switched from the fixed
image to a different image. A vaguely visible “residual image” can still be seen at
the place where it was.
Figure 2. Image sticking phenomenon
The “stuck on” image can be “prevented” or “”recovered” by adopting the
following guidelines in designing the system.
Pls don’t run the LCD with “fixed” image more than 8hrs of period, Especially, it is
running in the elevated temperature environment.
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While running the LCD more than 12hrs continually, LCD should turn-off for a
while( 1 hour)Њ, in addition, all operation condition should meet product
specification.
In defining the icons, button or windows in the screen, “Block Pattern” is preferred
than “Line Boarder Pattern”. Avoid using lines in dividing different display area.
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Figure 4. “Block Pattern” v.s. “Line Boarder Pattern”
If a static image is necessary, at the boundary of two different colors, try to use
colors that are symmetric to the middle grey level, and slightly shift the boarder line
once in a while.
It is better to set those areas with longer displaying time in medium gray colors.
Prevent thermal problem
In using a TFT LCD for a commercial applications (such as PID), it is often that
LCD panel is set up in one system cover (see example as below) to present
information or advertisement on the screen for a long period of time.
Figure 1. Public information display (PID)
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When PID system runs for a long time, LCD panel and other key parts would be
hotter and hotter. Finally, it is possible to over their thermal specifications. In this
case, PID system may be malfunction.
However, the “thermal problem” can be “prevented” by adopting the following
guidelines in designing the system.
Procedure & Subject MatterΚΚΚΚ
In order to prevent thermal problems, we hope customer may follow up below
flows when they use AUO panel to design their PID system.
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Figure 2. Thermal design process
2.1 Try not to run the LCD in a closed environment. Suitable venting on the system
cover or TV wall would be helpful for cooling.
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2.2 It is recommended to perform computational fluid dynamics (CFD) simulations
and real experiments to find out potentially thermal problem of PID system before
mass production.
2.3 If a thermal sensor (such as thermistor) is available, suggest to build it in PID
system to monitor the temperature of key part or internal environment
temperature.
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Figure 3. Thermistor for temperature monitoring
2.4 When the temperature of specified component over its thermal specification, it
may be malfunction and be damaged because of high temperature. We should make
sure that the temperatures of all key parts are below their specifications.
2.5 It is better to adapt active cooling with fans for long time displaying, especially
for high luminance LCD model. But we should consider noise side effect in the
same time.
Apply LCD for outdoor application.
If utilize this panel in outdoor field, all operation condition should meet product
specification.
Don’t move this product while turn on this product
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