5 Wire Analog Resistive Touchscreen
FST Series Product Specifications
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FST Series Product Specifications
1. Product Specifications
1-1. Product Applicable
§ This specification is applied to the 5 wire analog resistive touchscreen: FST Series.
1-2. Structure
§ Dimensions, structure, and shape are referred on the drawing attached.
1-3. Environmental Specifications
Specification
Value
Operating Temperature
-20°C to 70°C (no condensation)
-20°C to 60°C Less than 90%RH (no condensation)
Exceeding 60°C 133.8g/m3 (no condensation)
-40°C to 80°C (no condensation)
Operating Humidity
Storage Temperature
Storage Humidity
-40°C to 60°C Less than 95%RH (no condensation)
Exceeding 60°C 142.9g/m3 (no condensation)
Toluene, Tricholoroethylene, Athetone, Alcohol,
Gasoline, Machine Oil, Ammonia, Glass Cleaner,
Mayonnaise, Ketchup, Wine, Salad Oil, Vinegar, Lipstick, etc.
Chemical Resistance
(top surface)
1-4. Mechanical Characteristics
Specification
Value
Activation Force
0.05N to 0.8N
Input (finger)
Character Input (pen)
35,000,000 hits
Operating Life
100,000 characters
Light Transmittance
Surface Hardness
Over 80% (typical value at full wavelength)
Over 2H (by JIS pencil hardness)
1-5. Electrical Characteristics
Specification
Value
Maximum Voltage
DC6V
Bottom Electrode
Between the Top and Bottom
Under ±2%
(5% inside of active area after 9 points calibration.)
200mA
Maximum Current
0.5mA
Linearity
Terminal Resistance
Insulation Resistance
Chattering
Bottom Electrode
Less than 200Ω
Active Area Electrodes
Over 20MΩ at 25V
Less than 10msec at ON/OFF.
3
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FST Series Product Specifications
1-6. Appearance
§ Scratch, dust (W = width, L = length, D = average diameter = (longest + shortest) /2)
Item
Size (mm)
0.1≥W>0.05
0.05≥W>0.03
0.03≥W
Length (mm)
4≥L
Acceptable Numbers
1pcs in φ30mm
2pcs in φ20mm
Acceptable
Total
Scratch
10≥L
20≥L
0.1≥W>0.05
0.05≥W
5≥L
2pcs in φ30mm
Acceptable
Dust
Within 5pcs per
product.
(Linear)
Acceptable
1pcs in Viewing Area *1
2pcs in φ30mm
Acceptable
0.4≥D>0.3 *1
Dust
0.3≥D>0.2
0.2≥D
(Circular)
Applied only in the Active Area. Scratches or dusts in the outside of the Active Area are acceptable unless the
electrical characteristics are affected.
*1 Applied to the size of 14 inches or more.
§ Dirt
Acceptable if not noticeable on a black mat.
§ Tip, crack (t = glass thickness) (applicable only for the glass)
Item
Size (mm)
Acceptable Numbers
X
Y
Z
X
Y
Z
≤3
≤3
≤t
Z
2pcs
X
Y
Corner
/panel
Y
≤5
≤3
≤t
X
2pcs
/side
Side
Z
Crack
0pcs (acceptable)
4
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FST Series Product Specifications
2. Testing Regulation
2-1. Testing Regulation
§ If the regulation is not specified, the test is performed under the supplier’s regulation.
§ Tests are performed under the room temperature unless specified. The room temperature is referred as
follows:
Temperature: 20°C±5°C
Humidity:
65%±10%RH
2-2. Environmental Specifications
§ Chemical Resistance Test
Condition:
Tested after leaving the chemical on the surface for 12 hours being wiped off by cloth.
Judgement: Must be no effect in appearance.
2-3. Mechanical Characteristics
§ Activation Force Test
Condition:
Measured by depressing the point between
the dots to the conduction by the testing rod.
Silicon Rubber
(Hardness: 60°)
Tip: R = 4.0
Judgement: Must satisfy the specification.
§ Operating Life Test (Finger)
Figure 1: Testing rod 1
Condition:
Testing rod: Refer to Figure 1
Voltage:
Load:
DC5V
300g
Cycle:
2 hits/sec
Judgement: Must satisfy the following:
Activation Force:
Within ±50% of the specification.
Linearity:
Must satisfy the specification.
Must satisfy the specification.
Must satisfy the specification.
Must satisfy the specification.
Terminal Resistance:
Insulation Resistance:
Appearance:
§ Operating Life Test (Pen)
Condition:
Testing rod: Refer to Figure 2
Polyacetal resin
Tip: R = 0.8
Voltage:
Load:
DC5V
250g
Input size: 10 x 10 mm
Input character: A to Z/minute
Figure 2. Testing rod 2
Judgement:
Must satisfy the following:
Activation Force:
Linearity:
Terminal Resistance:
Insulation Resistance:
Within ±50% of the specification.
Must satisfy the specification.
Must satisfy the specification.
Must satisfy the specification.
5
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FST Series Product Specifications
2-4. Electrical Characteristics
§ Terminal Resistance Test
Condition:
Top and bottom electrodes are measured at the terminal.
Judgement: Must satisfy the specification.
§ Insulation Resistance Test
Neighboring Terminals: Measured by applying the reference voltage to the terminals
Active Area Electrodes: Measured by applying the reference voltage to the top and bottom electrodes.
Judgement:
Must satisfy the specification.
2-5. Appearance
§ Appearance Test
Condition:
Tested by an examiner with over 1.0 eyesight at 30cm away from the product under the
transmittable light at over 60° the surface of the product.
Judgement: Must satisfy the specification.
6
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FST Series Product Specifications
3. Reliability Condition
3-1. Temperature Condition
§ Temperature Condition Test
Following test are performed in the condition with no dew condensation:
Cold Test:
Tested after leaving the parts in -30°C±3°C for 240 hours and in the room temperature
for 2 hours.
Heat Test:
Tested after leaving the parts in 80°C±3°C for 240 hours and in the room temperature for
2 hours.
Humidity Test: Tested after leaving the parts in the temperature 60°C±3°C, humidity 90 to 95% for 240
hours and in the room temperature for 2 hours.
Cycle Test:
Judgement:
Tested after 5 cycles of leaving the parts in the temperature -30°C±3°C for 1 hour and in
the room temperature for 0.5 hours, then leaving the parts in the temperature 70°C±3°C
for 1 hour and in the room temperature for 0.5 hours.
Must satisfy the following:
Activation Force:
Linearity:
Terminal Resistance:
Within ±50% of the specification.
Must satisfy the specification.
Must satisfy the specification.
Insulation Resistance: Must satisfy the specification.
Appearance: Must satisfy the specification.
4. Recommended Connector
4-1. Recommended Connector
Part No.
Manufacturer
J.S.T. Mfg Co., Ltd
Pitch
Remarks
RE-H052SD-1110
2.54mm
equivalent
7
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FST Series Product Specifications
5. Handling Notes
5-1. Precautions
§ This product is intended for use in standard applications (computers, office automation, and other office
equipment, industrial, communications, and measurement equipment, personal and household devices,
etc.) Please avoid using this product for special applications where failure or abnormal operation may
directly affect human lives, or cause physical injury or property damage, or where extremely high levels
of reliability are required (such as aerospace systems, vehicle operating control, atomic energy controls,
medical devices for life support, etc.).
5-2. Handling Notes
§ Do not depress or scratch the product with any object with a sharp edge or end.
§ Do not forcibly bend or fold the product.
§ When the product is stored, make sure it is packed in a packing box and stored in a storage temperature
range, eliminating any outside load.
§ Do not use or store the product under a condition where the product will be exposed to water, organic
solution or acid.
§ Do not use the product under the direct sunlight.
§ Do not disassemble the product.
§ When you handle the product, Hold the product by its body. Do not hold by the tail.
§ Clean the product with a soft cloth or a soft cloth with neutral detergent or alcohol. When contaminated
by chemicals, wipe them off immediately with caution not to cause injury to human body.
§ The edge of the glass is not rounded and may cause injury.
5-3. Construction Notes
§ The environmental specifications, mechanical characteristics, and electrical characteristics are only
applied to the Active Area.
§ Do not use the touchscreen when the condensation occurs. The condensation inside of the touchscreen
is a natural phenomenon and should disappear after the touchscreen is warmed up.
5-4. Electrical & Software Notice
The best performance can be obtained when used with the original 5 wire analog resistive touchscreen
controller, “TSC-20” Series. If the touchscreen controller or controller software is to be developed by the
customer, please note the following:
§ There is a contact resistance between the top and bottom electrodes and it changes by the pressure of a
finger or a pen. The data must be read after the contact resistance becomes stabilized.
§ The terminal resistance of the 5 wire analog resistive touchscreen varies by the individual, time, and
environment. The controller software must have the calibration function to adjust the input position and
the display position.
§ The 5 wire analog resistive touchscreen outputs 2 point input as 1 point in between the 2 points. The
controller software must not be designed to have the 2 point input function.
§ For drawing applications, the line may be intermittent when the pen comes on the dot spacers. A
software compensation is needed.
8
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FST Series Product Specifications
5-5. Mounting Notes
§ Gap between the Bezel and Touchscreen
Bezel
A gap of approximately 0.5mm is needed between the bezel
and the top electrode. It may cause unexpected input if the
gap is too narrow.
Top Electrode
§ Cushion
If a cushion is used between the bezel and the top electrode,
the cushion must be free enough to absorb the expansion and
contraction difference between the bezel and the top
electrode. If the cushion is squashed too hard, the expansion
and the contraction difference may cause the distortion to the
top electrode.
Bezel
Cushion
Top Electrode
Insulation Area
The cushion must be positioned within the insulation area.
§ Tolerance
There is a tolerance of 0.2 to 0.3mm for the dimensions of the
touchscreen and the tail. A gap must be made to absorb the
tolerance in the case and the connector.
0.2 - 0.3mm
Case
§ Tail
The tail must not be forcibly stressed or bent too hard to avoid
the conduction in the insulated area and wire breaking.
Tail
Bezel
§ Mounting
Touchscreen must be held from the bottom such as the
structure gluing the touchscreen onto the display. If the
touchscreen is glued to the bezel, the adhesion between the
top and bottom electrode is stressed and may come off.
Display
§ Forbidden Area
Bezel
The area within 2mm from the insulation area is structurally
week for the pressure, espcially for pen use. The film may be
forcibly bent and may cause defection. This area must be
protected by the bezel and input must be avoided.
§ Air Vent
Forbidden Area
Most of the touchscreens have the air vent to equalize the
inside air pressure to the outside one. The air vent must be
open and liquid contact must be avoided as the liquid may be
absorbed if the lquid is accumilated near the air vent. The top
electlode must not be swelled by the air pressure from inside
of the case.
9
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FST Series Product Specifications
6. Warranty
6-1. Warranty Period
§ The warranty period is limited to 3 years from the date of shipping. The warranty for the initial defection
such as appearance defection is limited to 1 month.
§ Any defected parts under proper use will be examined by the supplier and replaced by the new parts if
the defection is considered to be caused by the supplier.
§ The replacement is subject to be included in the next lot.
6-2. Warranty Target
§ The warranty only covers the product itself and does not cover any damage to others caused by using
this product. Onsite repair or replacement is not supported.
§ We will do our best for delivery problem and product defections, but the warranty for the production line
is not covered.
§ Resistive touchscreens are structurally not repairable. All defections are subject to replacement.
6-3. Warranty Exceptions
Following conditions are not covered with the warranty and subject to charge.
§ Any malfunctions and damages during transportation and transfer by the user.
§ Any malfunctions and damages caused by a natural disaster or a fire.
§ Any malfunctions and damages caused by static electricity
§ Any malfunctions and damages caused by the failure of the associated equipment.
§ If the product is remodeled, disassembled or repaired by the user.
§ If the product is glued onto the equipment and uninstalled.
§ Any malfunctions and damages caused by an improper usage and handling against the specifications
and notes.
6-4. Tools
§ To maintain the quality, the printing screens and the die-cut plates are generally limited to use up to 1
year. Reorders after 1 year from the initial order or from the last renewal are subject to the tooling charge
for replacing the printing screens and the die-cut plates. Reorders for the discontinued standard parts are
also subject to tooling charge.
§ All the tools, such as CAD data (except for the drawing for approval), block copies (films), printing
screens, and die-cut plates are not to be provided for administrative purpose.
6-5. Changes
§ Because of the manufacturing process, changing the dimensions, circuit pattern, and the tail position
requires replacing most of the tools and is subject to high tooling charge. Please be careful when
ordering and approving the drawing.
§ Circuit pattern and the materials that does not affect the environmental, electrical, and mechanical
characteristics such as film, glass, ink and glue are subject to change for the supplier’s reason or for
improvement within the specifications.
§ Standard products are subject to change for improvement without notice.
10
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FST Series Product Specifications
7. Revision history
Rev1.0 (May 11, 2005)
Initial release
Rev1.1 (July 13, 2005)
4-1.Recommended Connector is changed RE-H052SD-1130 to RE-H052SD-1110.
6-1.Warranty Period is changed 5 years to 3 years.
Rev2.0 (October 13, 2006)
The specification item name was changed.
1-3.”Storing Temperature” to “Storage Temperature”
1-3.”Storing Humidity” to “Storage Humidity”
1-4.”Operating Load” to “Activation Force”
1-4.”Light Transmissivity” to “Light Transmittance”
1-4.”Top Surface Hardness” to “Surface Hardness”
2-3.”Operating Load Test” to “Activation Force Test”
2-3.”Operating Load” to “Activation Force”
3-1.”Operationg Load” to “Activation Force”
1-4.Activation Force is changed “0.5N±0.3” to “0.05N to 0.8N”.
1-5.Linearity: Added “5% inside of active area after 9 points calibration.”
1-5.Insulation Resistance is changed 100MΩ to 20MΩ.
1-6.The appearance inspection standard was improved.
1-6.Tip, crack: Deleted “Applied only in the Active Area. Scratches or dusts in the outside of the Active Area are
acceptable unless the electrical characteristics are affected.”
2-4.Added “Operating Life Test (Pen)”.
11
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FST Series Product Specifications
FST Series Product Specifications
Rev. 2.0, October 13, 2006
© 2005 - 2006 DMC Co., Ltd.
This document can be freely distributed, but any alternation to this document is prohibited.
9th floor, Kanda Sento Building, 1-2-4 Yushima, Bunkyo-Ku, Tokyo 113-0034, Japan
Phone: +81-3-5209-7131 (Japanese), 7135 (English) Fax: +81-3-5209-7130
12
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