Touch Solution


Winsonic has several years experience on the touch solution development, range from Resistive Touch, SAW Touch, Surface Capacitive Touch, Projected Capacitive Touch, Infrared Touch, Optical Touch...
With our flexible mechanical design, we can provide a wide variety of touch product families, with variety of sizes, shapes, and surface treatments to accommodate virtually any application and environment.
You can check the technology to have the details.



PCT ( Projected Capacity Touch )


Touchscreens are available in a wide variety of product families, sizes, shapes, and surface treatments to accommodate virtually any application and environment.

Projected Capacitive Touch (PCT)


Capacitive touch is base static electricity on inducting capacitive voltage. Capacitive touch screen contains two ITO layers, hard coat layers and two sensing arrays (X & Y). As X and Y arrays exist on different layers. When electrical inducted one of the arrays through the drive line then the other array and the circuitry will detects the values of capacitive. The controller sends electrical currents to the drive lines on different layers to create a specific nodes. When a finger touch the panel after that controller will catch the value of capacitive between nodes and drive line to point out exactly location.


Benefits


Long Life
Excellent Optical Properties
Multi-Touch
Ease to Integration


Working Theory
Capacitive sensors detect anything that is static electricity.

Touch Device Result Description
Finger OK
Fingernail X (It does no static electricity)
Pen X (It does no static electricity)
Gloves for Mechanics X (It can not conduct static electricity)
Medical Glove OK
Eraser X (It can not conduct static electricity)
Credit Card X (It can not conduct static electricity)
Soft Stylus X (It does no static electricity)
Special Capacitive Stylus OK
Paper Clip (It conduct few static electricity, work not very smoothly)
Water Drop on the Touch X (water interfere with sensor)



Resistive Touch



How It Works?


Resistive technology is suitable for variety of applications and environments.Resistive Touch Panel is two transparent resistive ITO layers (conductive and resistive layers) consisting of a sensor.

4-wire analog resistive touch panel


Each ITO layer consists of two Conductive Bars.? When touch pressure is inducted, then voltage is applied across the screen in the Y direction and presses two layers together. The voltage can be contacted with one of the X electrodes. The result of the touch creates a point, so the Y coordinate can be determined.

Benefits


Low cost
Broad input flexibility.
Dust-proof and liquid resistance.
High accuracy and durability.


5-wire analog resistive touch panel


5-wire resistive has 4 linearization patterns and 4 electrodes (circular). Linearization pattern and electrodes are resided in the same ITO layer. Then 4-side of linearization pattern is called fifth wire.

Benefits


High resolution and sensitivity.
Broad input flexibility.
Dust-proof and liquid resistance.
High accuracy and durability.
Long lifetime.
(almost ten times of 4-wire resistive panel)
Working Theory
When the top ITO film is pressed and makes contact with the bottom glass, the contacted area will be detected via electrical conduction.

Touch Device Result Description
Finger OK
Fingernail OK
Pen OK
Gloves for Mechanics OK
Medical Glove OK
Eraser OK
Credit Card OK
Soft Stylus OK
Special Capacitive Stylus OK
Paper Clip OK
Water Drop on the Touch OK (Still able to active)


8-wire analog resistive touch panel


Compare a 4-wire touch screen with 8-wire touch screen; an 8-wire touch screen has more sense wires to the end of each conductive bar. These sense wires calibrate out any voltage offset by the wiring or drive circuitry.

Benefits


High resolution and sensitivity.
Broad input flexibility.
Dust-proof and liquid resistance.
High accuracy and durability.



SAW Touch


Touchscreens are available in a wide variety of product families, sizes, shapes, and surface treatments to accommodate virtually any application and environment.

Surface Acoustic Wave - SAW Touch (ST)


Surface Acoustic Wave is used acoustic waves traveling over the surface. It contains substrate material, 4 transducers, the array of reflectors and attached to the beveled edge of the glass for X and Y axis. ( 2 for transmitting and 2 for receiving ) Each of transmitting transducers (X and Y) is located at horizontal and vertical edges. Each of receiving transducers (X and Y) is located at the opposite edges. When the user touches screen, some of the energy is absorbed after that transmitting of X and Y will detect the reducing energy and response to receiving transducers of X and Y.

Benefits


High touch resolution
Clarity
High light transmission
High impact resistance



Positional Accuracy
Standard deviation of error is less than ±2 %.

Working Theory
Based on sending acoustic waves across a clear glass panel with a series of transducers and reflectors. When a finger touches the screen, the waves are absorbed, causing a touch event to be detected at that point.

Touch Device Result Description
Finger OK
Fingernail X (It needs soft object)
Pen X (It needs soft object)
Gloves for Mechanics X (It needs soft object)
Medical Glove OK
Eraser OK (soft eraser)
Credit Card X (It needs soft object)
Soft Stylus OK
Special Capacitive Stylus X (It needs soft object)
Paper Clip X (It needs soft object)
Water Drop on the Touch X Around 10C.C. of water drop will cost IR rays infraction.



Infrared Touch


Touchscreens are available in a wide variety of product families, sizes, shapes, and surface treatments to accommodate virtually any application and environment.

Infrared Touch (IT)


Infrared technology use on touch panel is consisted with rows of LEDs and transistors on each edge of touch frame. Each of light emitting diode creates light beam and sends to the other side of light detector. These light beams become an IR light grid. When IR light beams are interrupted on any location then the controller will calculate X distance and Y distance and then send exactly position to the computer.

Benefits


Excellent optical readability 100% light transmission since no overlay covering the display screen. All kinds of stylus materials can be used on Infrared Touch Screen.

Ease of installation
Vandal resistant bezel
Works under sunlight
Long lifetime

Working Theory
Infrared touch screens operate by detecting interrupted infrared light beams.

Touch Device Result Description
Finger OK
Fingernail OK
Pen OK
Gloves for Mechanics OK
Medical Glove OK
Eraser OK
Credit Card OK
Soft Stylus OK
Special Capacitive Stylus OK
Paper Clip (the object is too small,will not sensitive)
Water Drop on the Touch (A little of water drops will work properly)



Optical Bonding ( Optional )


What is Optical Bonding


The affixing of two rigid optical elements using transparent adhesive to reduce reflectance and provide vandal resistance.

Main Benefit


• Increased sunlight readability up to 400%
• Increased impact resistance up to 300%
• Increased durability to shock & vibration
• Increased scratch resistance up to 300%
• Enables resistance to extreme temperatures
• Enable thinner and lighter display designs
• Prevents condensation and fogging
• Resists stains, dirt, dust, scratches and moisture

Comparison of the performance




Contrast - Protective Glass




SCT ( Surface Capacity Touch )


Touchscreens are available in a wide variety of product families, sizes, shapes, and surface treatments to accommodate virtually any application and environment.

Surface Capacitive Touch (SCT)


Capacitive touch is base static electricity on inducting capacitive voltage. Surface capacitive touch is a glass bass. The two faces of glass are coated with conductive ITO. The edges of glass bass are printed electrode bar. The electrode bar supplies micro electric quantity to conductive ITO layer. When a finger touches the screen and then capacitive voltage will change its value then the point (X&Y) is created. The controller will calculate X distance and Y distance and then transmit to the computer.

Benefits


Long Life
Excellent Optical Properties
Ease to Integration
Fast, sensitive touch
Working Theory
Capacitive sensors detect anything that is static electricity.

Touch Device Result Description
Finger OK
Fingernail X (It does no static electricity)
Pen X (It does no static electricity)
Gloves for Mechanics X (It can not conduct static electricity)
Medical Glove OK
Eraser X (It can not conduct static electricity)
Credit Card X (It can not conduct static electricity)
Soft Stylus X (It does no static electricity)
Special Capacitive Stylus OK
Paper Clip (It conduct few static electricity, work not very smoothly)
Water Drop on the Touch X (water interfere with sensor)