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AZ DISPLAYS ENGINEERING APPROVAL DESIGNED BY CHECKED BY APPROVED BY WJQ LJF GZH CUSTOMER APPROVAL ※ PART NO. : ACM2004D-FL-YBE (AZ DISPLAYS) VER 1.0 APPROVAL COMPANY CHOP CUSTOMER COMMENTS
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 1 REVISION RECORD REVISION REVISION DATE PAGE CONTENTS VER1.0 2017-04-25 FIRST ISSUE
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 2 ※ CONTENTS
1.0 GENERAL SPECS
2.0 ABSOLUTE MAXIMUM RATINGS
3.0 ELECTRICAL CHARACTERISTICS
4.0 OPTICAL CHARACTERISTICS
5.0 BLOCK DIAGRAM
6.0 PIN ASSIGNMENT
7.0 POWER SUPPLY
8.0 TIMING CHARACTERISTICS
9.0 MECHANICAL DIAGRAM
10.0 RELIABILITY TEST
11.0 DISPLAY INSTRUCTION TABLE
12.0 CHARACTER PATTERNS
13.0 PRECAUTION FOR USING LCM
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 3
- Display Format 20*4 Character 2. Power Supply 5.0V(Single power supply without DC-DC,adjustab le Vop) 3. Overall Module Size 98.0mm(W) x 60.0mm(H) x max 14.0mm(D) 4. Viewing Area(W*H) 76.0mm(W) x 25.2mm(H) 5. Dot Size (W*H) 0.55mm(W) x 0.55mm(H) 6. Dot Pitch (W*H) 0.60mm(W) x 0.60mm(H) 7. Character Size (W*H) 2.95mm(W) x 4.75mm(H) 8. Character Pitch (W*H) 3.55mm(W) x 5.35mm(H) 9. Viewing Direction 6:00 O’Clock 10. Driving Method 1/16Duty,1/5Bias 11. Controller IC ST7066U-0A or compatible 12. Display Mode STN/Y-G/Positive/ Transflective 13. Backlight Options Y-G LED/Bottom 14. Operating temperature -30ºC ~ 80ºC 15. Storage temperature -30ºC ~ 85ºC 16. RoHS RoHS compliant
Item Symbol Min Typ Max Unit Operating temperature Top -30 -- 80 ºC Storage temperature Tst -30 -- 85 ºC Input voltage Vin Vss-0.3 -- Vdd+0.3 V Supply voltage for logic Vdd- Vss 2.7 -- 5.5 V Supply voltage for LCD driving Vdd- V0 3.0 -- 8.0 V
3.1 Electrical Characteristics Of LCM
Item Symbol Condition Min Typ Max Unit Power Supply Voltage Vdd 25ºC -- 5.0 -- V Power Supply Current Idd Vdd=3.3V, fosc=270kHz -- -- -- mA Input voltage (high) Vih Pins:(E,RS,R/W,DB0- DB7) VDD=3.3V 0.7Vdd -- Vdd V Input voltage (low) Vil 0 -- 0.6 V Recommended LC Driving Voltage Vdd –V0 -30ºC 4.6 4.8 5.0 V 25ºC 4.3 4.5 4.7 80ºC 4.0 4.2 4.4
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 4
3.2 The Characteristics Of LED Backlight
3.2.1 Electrical-Optical Characteristics Of LED Backlight (Ta=25ºC)
Item Symbol Condition Min Typ Max Unit Forward Voltage(1) Vf If=120mA (5) 3.9 4.2 4.5 V Reverse Voltage Vr - -- -- 8 V Luminance(2) Lv If=120mA 75 100 -- cd/ ㎡ Uniformity(3) Δ (Lvmin/Lvmax)% 70% -- -- - Peak wave length λp If=120mA 570 -- 575 nm Lifetime(4) - If=120mA - 20000 - Hours NOTE: (1) Forward voltage means voltage applied directly to the LED, please refer to the backlight diagram. (2)The luminance is the average value of 5 points, The measurem ent instrument is BM-7 luminance colorimeter. The diameter of aperture is Φ5mm (3) Luminance means the backlight brightness without LCD. (4) Backlight lifetime means luminance value larger th an half of the original after 20000 hours’ continuous working. (5) Please apply the backlight current as the table re commend. If LCM surface luminance is acceptable, please apply the driving current as lower as possible. Any time, do not apply the driving current higher than 190mA.
3.2.2 Backlight Control Circuit for LCM（2x24=48 pcs LED）
15( BL+ ) 16( BL- ) R= 6.8Ω Vf
3.2.3 LED Typical Electro-Optical Characteristics Curve（for single led）
- Forward current vs. Ambient temperature 2. Forward current vs. Forward voltage
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 5 4.0 OPTICAL CHARACTERISTICS (Ta=25ºC, Vdd= 5.0V±0.25V) Item Symbol Condition Min Typ Max Unit Viewing angle (Left - right) 2 Cr 2.0 -35 - 35 deg Viewing angle (Up-down) 1 Cr 2.0 -25 - 40 deg Contrast Ratio Cr 1=0, 2=0 - 5 - Response time (rise) Tr 1=0, 2=0 - 180 300 ms Response time (fall) Tf 1=0, 2=0 - 150 250 ms (1). Definition of Optical Response Time (2). Definition of Contrast Ratio
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 6 (3). Definition of Viewing Angle θ 1 and θ 2 R=6.8Ω SEG121-200 U3U2 SEG200 SEG41-120 SEG1 COM1 SEG1-40 LCD 20X4 COM16 1.VSS 2.VDD 3.V0 5.R/W 14.DB7 7.DB0 6.E 4.RS LED Backlight COM1-16 16.(BL-) 15.(BL+)
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 7
6.0 PIN ASSIGNMEN
Pin No. Symbol Function
1 V ss Ground
2 V dd +5.0V
3 V 0 LCD contrast adjust
4 RS Register select
5 R/W Read / Write Signal
6 E Enable Signal
7 DB0 Data bit 0
8 DB1 Data bit 1
9 DB2 Data bit 2
10 DB3 Data bit 3
11 DB4 Data bit 4
12 DB5 Data bit 5
13 DB6 Data bit 6
14 DB7 Data bit 7
15 BL+ 5.0V
16 BL- 0V
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 8 Write mode (Writing Data from MPU to ST7066U) Read mode (Reading Data from ST7066U to MPU) For more details, please refer to IC specification.
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 9 A 1 2 3 4 5 6 78 2 3 4 5 6 B C D E F A B C D E F 7 8 Unspecified Tolerance:±0.2mm 1 16
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 10 NO Test Item Description Test Condition Remark Environmental Test High temperature storage Applying the high storage temperature Under normal humidity for a long time Check normal performance 85ºC 1000hrs
2 Low temperature
Applying the low storage temperature Under normal humidity for a long time Check normal performance -30ºC 240hrs
3 High temperature
Apply the electric stress(Voltage and current) Under high temperature for a long time 80 ºC 1000hrs Note1
4 Low temperature
Apply the electric stress Under low temperature for a long time -30ºC 240hrs Note1 Note2 High temperature/High Humidity Storage Apply high temperature and high humidity storage for a long time 85% RH 85ºC 1000hrs Note2
6 Temperature Cycle
Apply the low and high temperature cycle 30min 10min 30min 10min 1 cycle Check normal performance -30ºC/85ºC 10 cycle Mechanical Test Vibration test(Package state) Applying vibration to product check normal performance Freq:10~55~10Hz Amplitude:0.75mm 1cycle time:1min X.Y.Z every direction for 15 cycles
8 Shock test(package
state) Applying shock to product check normal performance Drop them through 70cm height to strike horizontal plane
9 Other
Note1:Normal operations condition (25ºC±5ºC). Note2:Pay attention to keep dewdrops from the module during this
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 11
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 12 Note: The character generator RAM is the RAM with which the user can rewrite character patterns by program.
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 13
- When design the product with this LCD Module, make sure the viewing angle matches to its purpose of usage. 2. As LCD panel is made of glass substrate, Dropping the LCD mo dule or banging it against hard objects may cause cracking or fragmentation. Especially at corners and edges. 3. Although the polarizer of this LCD Module has the anti-glare coating, always be careful not to scratch its surface. Use of a plastic cover is recommended to protect the surface of polarizer. 4. If the LCD module is stored at below specified temperature, the LC material may freeze and be deteriorated. If it is stored at above specified temperature, the molecular orientation of the LC material may change to Liquid state and it may not revert to its original state. Excessive temperature and humidity could cause polarizer peel off or bubble. Therefore, the LCD module should always be stored within specified temperature range. 5. Saliva or water droplets must be wiped off immediately as th ose may leave stains or cause color changes if remained for a long time. Water vapor will cause corrosion of ITO electrodes. 6. If the surface of LCD panel needs to be cleaned, wipe it swi ftly with cotton or other soft cloth. If it is not still clean enough, blow a breath on the surface and wipe again. 7. The module should be driven according to the specified ratin gs to avoid malfunction and permanent damage. Applying DC voltage cause a rapid deterioration of LC material. Make sure to apply alternating waveform by continuous application of the M signal. Especially the power ON/OFF sequence should be kept to avoid latch- up of driver LSIs and DC charge up to LCD panel. 8. Mechanical Considerations a) LCM are assembled and adjuste d with a high degree of precision. Avoid excessive shocks and do not make any alterations or modifications. The following should be noted. b) Do not tamper in any way with the tabs on the metal frame. c) Do not modify the PCB by drillin g extra holes, changing its outline, moving its components or modifying its pattern. d) Do not touch the elastomer connector; especially insert a ba cklight panel (for example, EL). e) When mounting a LCM makes sure that the PCB is not under any stress such as bending or twisting. Elastomer contacts are very delicate and missing pixels could result from slight dislocation of any of the elements. f) Avoid pressing on the metal bezel, otherwise the elastomer c onnector could be deformed and lose contact, resulting in missing pixels. 9. Static Electricity a) Operator Ware the electrostatics shielded clothes because human body may be statically charged if not ware shielded clothes. Never touch any of the conductive parts such as the LSI pads; the copper leads on the PCB and the interface terminals with any parts of the human body. b) Equipment There is a possibility that the static electricity is charged to the equipment, which has a function of peeling or friction action (ex: conveyer, soldering iron, working table). Earth the equipment through proper resistance (electrostatic earth: 1x108 ohm). Only properly grounded soldering irons should be used. If an electric screwdriver is used, it should be well grounded and shielded from commutator sparks. The normal static prevention measures should be observed for work clothes and working benches; for the latter conductive (rubber) mat is recommended. c) Floor Floor is the important part to drain static electricity, which is generated by operators or equipment. There is a possibility that charged static electricity is not properly drained in case of insulating floor. Set the electrostatic earth (electrostatic earth: 1x108 ohm). d) Humidity Proper humidity helps in reducing the chance of generating electrostatic charges. Humidity should be kept over 50%RH. e) Transportation/storage The storage materials also need to be anti-static treated because there is a possibility that the human body or storage materials such as containers may be statically charged by friction or peeling. The modules should be kept in antistatic bags or other containers resistant to static for storage. f) Soldering Solder only to the I/O terminals. Use only soldering irons with proper grounding and no leakage. Soldering temperature : 280°C ± 10°C
ACM2004D-FL-YBE (AZ DISPLAYS) CHARACTER MODULE VER1.0 AZ DISPLAYS 14 Soldering time: 3 to 4 sec. Use eutectic solder with resin flux fill. If flux is used, the LCD surface should be covered to avoid flux spatters. Flux residue should be removed afterwards. g) Others The laminator (protective film) is attached on the surface of LCD panel to prevent it from scratches or stains. It should be peeled off slowly using static eliminator. Static eliminator should also be installed to the workbench to prevent LCD module from static charge. 10. Operation a) Driving voltage should be kept within specified range; exces s voltage shortens display life. b) Response time increases with decrease in temperature. c) Display may turn black or dark blue at temperatures above it s operational range; this is (however not pressing on the viewing area) may cause the segments to appear “fractured”. d) Mechanical disturbance during operation (such as pressing on the viewing area) may cause the segments to appear “fractured”. 11. If any fluid leaks out of a damaged glass cell, wash off any human part that comes into contact with soap and water. The toxicity is extremely low but caution should be exercised at all the time. 12. Disassembling the LCD module can cause permanent damage and it should be strictly avoided. 13. LCD retains the display pattern when it is applied for long time (Image retention). To prevent image retention, do not apply the fixed pattern for a long time. Image retention is not a deterioration of LCD. It will be removed after display pattern is changed. 14. Do not use any materials, which emit gas from epoxy resin (hardener for amine) and silicone adhesive agent (dealcohol or deoxym) to prevent discoloration of polarizer due to gas. 15. Avoid the exposure of the module to the direct sunlight or strong ultraviolet light for a long time.