Product Specifications: Displaytech LTD
Product Specifications: Displaytech LTD
Product Specifications: Displaytech LTD
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PRODUCT SPECIFICATIONS
PHYSICAL DATA
EXTERNAL DIMENSIONS
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
OPERATING PRINCIPLES & METHODS
DISPLAY DATA RAM ADDRESS MAP
ELECTRO-OPTICAL CHARACTERISTICS
INTERFACE PIN CONNECTIONS
CIRCUIT DIAGRAM
RELIABILITY
QUALITY GUARANTEE
INSPECTION CRITERIA
PRECAUTIONS FOR USING LCD MODULES
USING LCD MODULES
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PHYSICAL DATA
Item Contents Unit
LCD type STN / FSTN ---
LCD duty 1/64 ---
LCD bias 1/9 ---
Viewing direction 6 / 12 o’clock
Module size (W×H×T) 75 x 52.7 x 6.8 MAX (8.9 MAX W/LED BACKLIGHT) mm
Viewing area (W×H) 60 x 32.5 mm
Number of dots 128 × 64 dots
Dot size (W×H) 0.40 x 0.40 mm
Dot pitch (W×H) 0.43 x 0.43 mm
EXTERNAL DIMENSIONS
BLOCK DIAGRAM
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AC Characteristics
MPU Interface
Input Register
Input register is provided to interface with MPU which is different operating frequency. Input register stores the data
temporarily before writing it into display data RAM.
When CS1 or CS2 is in the active mode, R/W and D/I select the input register. The data from MPU is written into input
register and then write it into display data RAM. Data is latched when falling of the E signal and written automatically into the
display data RAM by internal operation.
Output Register
Output register stores the data temporarily from display data RAM when CS1 or CS2 is in active mode and R/W and D/I=H.
Stored data in display data RAM is latched in output register. When CS1 or CS2 is in active mode and R/W=H, D/I=L, status data
(busy check)can be read out.
To read the contents of display data RAM, twice access of read instruction is needed. In first access, data in display data RAM
is latched into output register. In second access, MPU can read data which is latched. That is, to read the data in display data
RAM, it needs dummy read. But status read does not need dummy read.
Reset
System reset can be initialized by setting RST terminal at low level when turning power on, receiving instruction from MPU.
When RST becomes low, following procedure is occurred.
- Display off
- Display start line register become set by 0.(Z-address 0)
While RST is low level, no instruction except status read can be accepted. Reset status appears at DB4. After DB4 is low, any
instruction can be accepted.
The Conditions of power supply at initial power up are shown in table 1.
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4.5[V]
VDD
tRST
tr
0.7VDD
0.3VDD
RST
Busy Flag
Busy flag indicates that KS0108B is operating or not operating. When busy flag is high, KS0108B is in internal operating.
When busy flag is low, KS0108B can accept the data or instruction.
DB7 indicates busy flag of the KS0108B.
Busy flag
X page Register
X page register designates page of the internal display data RAM. It has not count function. An address is set by instruction.
Y Address Counter
Y address counter designates address of the internal display data RAM. An address is set by instruction and is increased by 1
automatically by read or write operations of display data.
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Instruction D/I R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Function
Display ON/OFF 0 0 0 0 1 1 1 1 1 0/1 Controls the display on or off.
Internal status and display RAM
data are not affected.
0:OFF, 1:ON
Set Address 0 0 0 1 Y address (0∼63) Sets the Y address in the Y
address counter.
Set Page 0 0 1 0 1 1 1 Page Sets the X address at the X
(X address) (0∼7) address register.
Display Start Line 0 0 1 1 Display start line Indicates the display data RAM
(0∼63) displayed at the top of the screen.
Status Read 0 1 B 0 O R 0 0 0 0 Read status.
U N E BUSY 0 : Ready
S / S 1 : In operation
Y O E ON/OFF 0 : Display ON
F T 1 : Display OFF
F RESET 0 : Normal
1 : Reset
Write Display Data 1 0 Write Data Writes data (DB0:7) into display
data RAM. After writing
instruction, Y address is increased
by 1 automatically.
Read Display Data 1 1 Read Data Reads data (DB0:7) from display
data RAM to the data bus.
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Note2: Definition of contrast ratio ‘Cr’ . Note3: Definition of viewing angle range ‘θ’.
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CIRCUIT DIAGRAM
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RELIABILITY
Content of Reliability Test
Environmental Test
No. Test Item Content of Test Test Condition Applicable
Standard
1 High temperature Endurance test applying the high storage 60 °C ------
storage temperature for a long time. 200 hrs
2 Low temperature Endurance test applying the low storage -10 °C ------
storage temperature for a long time. 200 hrs
3 High temperature Endurance test applying the electric stress 50 °C
operation (Voltage & Current) and the thermal stress to 200 hrs ------
the element for a long time.
4 Low temperature Endurance test applying the electric stress under 0 °C ------
operation low temperature for a long time. 200 hrs
5 High temperature / Endurance test applying the high temperature 60 °C , 90 %RH MIL-202E-103B
Humidity storage and high humidity storage for a long time. 96 hrs JIS-C5023
6 High temperature / Endurance test applying the electric stress 40 °C , 90 %RH MIL-202E-103B
Humidity operation (Voltage & Current) and temperature / humidity 96 hrs JIS-C5023
stress to the element for a long time.
7 Temperature cycle Endurance test applying the low and high -10°C / 60°C
temperature cycle. 10 cycles
-10°C 25°C 60°C ------
30min 5min. 30min
. 1 cycle .
Mechanical Test
8 Vibration test Endurance test applying the vibration during 10∼22Hz → 1.5mmp-p MIL-202E-201A
transportation and using. 22∼500Hz → 1.5G JIS-C5025
Total 0.5hrs JIS-C7022-A-10
9 Shock test Constructional and mechanical endurance test 50G half sign MIL-202E-213B
applying the shock during transportation. wave 1l msedc
3 times of each direction
10 Atmospheric pressure Endurance test applying the atmospheric 115 mbar MIL-202E-105C
test pressure during transportation by air. 40 hrs
Others
11 Static electricity test Endurance test applying the electric stress to the VS=800V , RS=1.5 kΩ MIL-883B-3015.1
terminal. CS=100 pF
1 time
∗∗∗ Supply voltage for logic system = 5V. Supply voltage for LCD system = Operating voltage at 25°C.
QUALITY GUARANTEE
Definition of ‘LOT’
One lot means the delivery quantity to customer at one time.
INSPECTION CRITERIA
Module Cosmetic Criteria
No. Item Judgement Criterion Partition
1 Difference in Spec. None allowed Major
2 Pattern peeling No substrate pattern peeling and floating Major
3 Soldering defects No soldering missing Major
No soldering bridge Major
No cold soldering Minor
4 Resist flaw on substrate Invisible copper foil (∅0.5mm or more) on substrate pattern Minor
5 Accretion of metallic No soldering dust Minor
Foreign matter No accretion of metallic foreign matters (Not exceed ∅0.2mm) Minor
6 Stain No stain to spoil cosmetic badly Minor
7 Plate discoloring No plate fading, rusting and discoloring Minor
8 Solder amount a. Soldering side of PCB Minor
Solder to form a ‘Filet’
1. Lead parts all around the lead.
Solder should not hide the
lead form perfectly. (too much)
b. Components side
( In case of ‘Through Hole PCB’ )
4 Scratch In accordance with spots and lines operating cosmetic criteria. When the light Minor
reflects on the panel surface, the scratches are not to be remarkable.
5 Allowable density Above defects should be separated more than 30mm each other. Minor
6 Coloration Not to be noticeable coloration in the viewing area of the LCD panels. Minor
Back-lit type should be judged with back-lit on state only.
7 Contamination Not to be noticeable. Minor
: Measuring points
Note :
(1) Size : d = (long length + short length) / 2
(2) The limit samples for each item have priority.
(3) Complexed defects are defined item by item, but if the number of defects are defined in above table, the total number
should not exceed 10.
(4) In case of ‘concentration’, even the spots or the lines of ‘disregarded’ size should not allowed. Following three situations
should be treated as ‘concentration’.
- 7 or over defects in circle of ∅5mm.
- 10 or over defects in circle of ∅10mm.
- 20 or over defects in circle of ∅20mm.
(8) Install the LCD Module by using the mounting holes. When mounting the LCD module make sure it is free of twisting,
warping and distortion. In particular, do not forcibly pull or bend the I/O cable or the backlight cable.
(9) Do not attempt to disassemble or process the LCD module.
(10) NC terminal should be open. Do not connect anything.
(11) If the logic circuit power is off, do not apply the input signals.
(12) To prevent destruction of the elements by static electricity, be careful to maintain an optimum work environment.
- Be sure to ground the body when handling the LCD modules.
- Tools required for assembling, such as soldering irons, must be properly grounded.
- To reduce the amount of static electricity generated, do not conduct assembling and other work under dry conditions.
- The LCD module is coated with a film to protect the display surface. Exercise care when peeling off this protective film
since static electricity may be generated.
Storage Precautions
When storing the LCD modules, avoid exposure to direct sunlight or to the light of fluorescent lamps. Keep the modules in
bags (avoid high temperature / high humidity and low temperatures below 0°C). Whenever possible, the LCD modules should be
stored in the same conditions in which they were shipped from our company.
Others
Liquid crystals solidify under low temperature (below the storage temperature range) leading to defective orientation or the
generation of air bubbles (black or white). Air bubbles may also be generated if the module is subject to a low temperature.
If the LCD modules have been operating for a long time showing the same display patterns, the display patterns may remain
on the screen as ghost images and a slight contrast irregularity may also appear. A normal operating status can be regained by
suspending use for some time. It should be noted that this phenomenon does not adversely affect performance reliability.
To minimize the performance degradation of the LCD modules resulting from destruction caused by static electricity etc.,
exercise care to avoid holding the following sections when handling the modules.
- Exposed area of the printed circuit board.
- Terminal electrode sections.
(2) When assembling the LCM into other equipment, the spacer to the bit between the LCM and the fitting plate should have
enough height to avoid causing stress to the module surface, refer to the individual specifications for measurements. The
measurement tolerance should be ±0.1mm.
Storage
When storing LCDs as spares for some years, the following precaution are necessary.
(1) Store them in a sealed polyethylene bag. If properly sealed, there is no need for dessicant.
(2) Store them in a dark place. Do not expose to sunlight or fluorescent light, keep the temperature between 0°C and 35°C.
(3) The polarizer surface should not come in contact with any other objects. (We advise you to store them in the container in
which they were shipped.)
(4) Environmental conditions :
- Do not leave them for more than 168hrs. at 60°C.
- Should not be left for more than 48hrs. at -20°C.
Safety
(1) It is recommended to crush damaged or unnecessary LCDs into pieces and wash them off with solvents such as acetone
and ethanol, which should later be burned.
(2) If any liquid leakes out of a damaged glass cell and comes in contact with the hands, wash off thoroughly with soap and
water.
Limited Warranty
Unless agreed between DISPLAYTECH and customer, DISPLAYTECH will replace or repair any of its LCD modules which
are found to be functionally defective when inspected in accordance with DISPLAYTECH LCD acceptance standards (copies
available upon request) for a period of one year from date of shipments. Cosmetic/visual defects must be returned to
DISPLAYTECH within 90 days of shipment. Confirmation of such date shall be based on freight documents. The warranty
liability of DISPLAYTECH limited to repair and/or replacement on the terms set forth above. DISPLAYTECH will not be
responsible for any subsequent or consequential events.