3G International Ltd.
Touch Panel
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Categories > Touch Panel
( Capacitive Touch Screen )
A capacitive touch screen panel is a sensor typically made of glass coated with a transparent conductor such as indium tin oxide (ITO). This type of sensor is basically a capacitor in which the plates are the overlapping areas between the horizontal and vertical axes in a grid pattern. When the finger touches the conductive coating, a small current is drawn from each corner towards the point of contact. Capacitive touch panel can either be touches with human’s finger, or with a conductive device being held by a bare hand.
The Apple iphone is an example of a product, which uses capacitance touch sensor technology. A controller measures the ratio of the current flow on each corner and calculated the location. It prevents from scratches and abrasions since the conductive layer is covered with a protective coating.
It is a durable technology that is used in a wide range of applications including point-of-sale systems (POS), LCD modules, industrial controls, calculator, electric calendar, and public information kiosks. It has a higher clarity than Resistive technology, but it only responds to finger contact and will not work with a gloved hand or pen stylus unless the stylus is conductive.
A capacitive touch screen panel is a sensor typically made of glass coated with a transparent conductor such as indium tin oxide (ITO). This type of sensor is basically a capacitor in which the plates are the overlapping areas between the horizontal and vertical axes in a grid pattern. When the finger touches the conductive coating, a small current is drawn from each corner towards the point of contact. Capacitive touch panel can either be touches with human’s finger, or with a conductive device being held by a bare hand.
The Apple iphone is an example of a product, which uses capacitance touch sensor technology. A controller measures the ratio of the current flow on each corner and calculated the location. It prevents from scratches and abrasions since the conductive layer is covered with a protective coating.
It is a durable technology that is used in a wide range of applications including point-of-sale systems (POS), LCD modules, industrial controls, calculator, electric calendar, and public information kiosks. It has a higher clarity than Resistive technology, but it only responds to finger contact and will not work with a gloved hand or pen stylus unless the stylus is conductive.
( Projective Capacitive Touch Panel )
Projected Capacitive Touch (PCT) technology is a type of capacitive technology which involves the relationship between an XY array of sensing wires embedded within two layers of non-metallic material, and a third object. In touch screen applications the third object can be a human finger. Projected capacitance creates an electrostatic field above the sensing surface to determine inputs. This format requires the use of patterned ITO and requires no calibration. Capacitance forms between the user’s fingers and projected capacitance from the sensing wires. A touch is made, precisely measured, then passed on to the controller system which is connected to a computer running a software application. This will then calculate how the user’s touch relates to the computer software. PCT screens enjoy the benefits of responding accurately to both fingers and styli.
Projected Capacitive Touch (PCT) technology is a type of capacitive technology which involves the relationship between an XY array of sensing wires embedded within two layers of non-metallic material, and a third object. In touch screen applications the third object can be a human finger. Projected capacitance creates an electrostatic field above the sensing surface to determine inputs. This format requires the use of patterned ITO and requires no calibration. Capacitance forms between the user’s fingers and projected capacitance from the sensing wires. A touch is made, precisely measured, then passed on to the controller system which is connected to a computer running a software application. This will then calculate how the user’s touch relates to the computer software. PCT screens enjoy the benefits of responding accurately to both fingers and styli.
( 4-Wire Resistive Touch Panel )
4-wire resistive touch screen is the most widely used touch application and has the most mature manufacturing technologies as compared to other touch screen technologies.
It is ideally suited for popular consumer market applications such as smart phones, GPS navigation systems, digital photo frames, and tablet PCs. The development of interactive touch products not only makes product operation easier, but also emphasizes the feeling of interactive communication for the consumers. Touch screen features improve the added value of products.
4-wire analog touch panel is designed with X+ and X- electrode on X layer, and Y+ and Y- electrode on Y layer. When touch panel is pressed, the conductive of X layer will contact the conductive of Y layer.
By reading the change of resistance at all four electrodes, the controller electronics will detect and determine the location of the pressed point.
4-wire resistive touch screen is the most widely used touch application and has the most mature manufacturing technologies as compared to other touch screen technologies.
It is ideally suited for popular consumer market applications such as smart phones, GPS navigation systems, digital photo frames, and tablet PCs. The development of interactive touch products not only makes product operation easier, but also emphasizes the feeling of interactive communication for the consumers. Touch screen features improve the added value of products.
4-wire analog touch panel is designed with X+ and X- electrode on X layer, and Y+ and Y- electrode on Y layer. When touch panel is pressed, the conductive of X layer will contact the conductive of Y layer.
By reading the change of resistance at all four electrodes, the controller electronics will detect and determine the location of the pressed point.
( 5-wire Resistive Touch Panel )
For 5-wire analog touch panel, an uniform electric field is formed at bottom layering equal voltage at four corners. The upper layer is similar to a common ground layer. When touch panel is pressed, the controller electronics will detect the change of resistance on four corners at bottom layer and determine the location of the pressed point.
How five-wire touch screen works
The touch screen estimates the x-y coordinates on the glass layer and film layer, like a sensor sensing the electric pressure drop on the glass layer.
When a user touches the touch screen, the upper ITO-coated conductive layer(on film layer) touches the lower ITO-coated conductive layer(on glass layer), hence the controller recognizes the touch of upper and lower plates, then apply a voltage drop onto the lower ITO-coated layer to indicate the x-coordinate. The upper plate sensed the value of electric potentials and passes it to the controller. Then the controller translates it to an x-coordinate value. Meantime, the y-coordinate value is calculated in a same way.
Finally, these calculated x-y coordinate value are passed to the computer and the location of touch will be displayed out.
For 5-wire analog touch panel, an uniform electric field is formed at bottom layering equal voltage at four corners. The upper layer is similar to a common ground layer. When touch panel is pressed, the controller electronics will detect the change of resistance on four corners at bottom layer and determine the location of the pressed point.
How five-wire touch screen works
The touch screen estimates the x-y coordinates on the glass layer and film layer, like a sensor sensing the electric pressure drop on the glass layer.
When a user touches the touch screen, the upper ITO-coated conductive layer(on film layer) touches the lower ITO-coated conductive layer(on glass layer), hence the controller recognizes the touch of upper and lower plates, then apply a voltage drop onto the lower ITO-coated layer to indicate the x-coordinate. The upper plate sensed the value of electric potentials and passes it to the controller. Then the controller translates it to an x-coordinate value. Meantime, the y-coordinate value is calculated in a same way.
Finally, these calculated x-y coordinate value are passed to the computer and the location of touch will be displayed out.
IR Touch Screen
( IR Touch Panel )IR Touch Panel is also called as IR Touch Screen, Infrared Touch Panel and Optical touch screen in different fields.
3GI can provide the IR touch screen products which are available from 15” to 84” in standard size, and also we accept custom-made on IR touch panel requirements (10.4" to 110").
We use infrared emitter-collector pairs to project an invisible grid of light a small distance over the surface of the screen. The absence of the signal at the collector is detected and converted to an X/Y touch coordinate, while a beam is interrupted.
Our Infrared touch screens are suitable for the applications on such as Gaming, ATM, POS, and Industrial applications.
How it work
Numerous pairs of projector and receiptor form a compact two-dimensional infrared ray web for both horizontal and vertical axis.
When you mak a touch, some receiptors receive a signal of decreased infrared ray. So that knowing the locatons of those receptors leads to form its coordinate information.
( Matrix Touch Panel )
Matrix touch panels are designed with transparent grid of rows and columns on both upper and bottom layers. By pressing the upper layer towards the bottom layer, conductive areas will touch each other and enable the touch panel to function just like an ordinary electrical switch. The specific location and shape of these conductive grids are very flexible and easy to be customized.
POS, Kiosk ,LCD Module, IA Product, E-Book,Toy, Calculator ,Electric calender, Game machines
Cost effective solution and easy to use resistive touch screen technology, which can be operated in commercial, medical or industrial applications and children's toys. We offer digital, analog, SAW panel and capacitive touch screens.
Matrix touch panels are designed with transparent grid of rows and columns on both upper and bottom layers. By pressing the upper layer towards the bottom layer, conductive areas will touch each other and enable the touch panel to function just like an ordinary electrical switch. The specific location and shape of these conductive grids are very flexible and easy to be customized.
POS, Kiosk ,LCD Module, IA Product, E-Book,Toy, Calculator ,Electric calender, Game machines
Cost effective solution and easy to use resistive touch screen technology, which can be operated in commercial, medical or industrial applications and children's toys. We offer digital, analog, SAW panel and capacitive touch screens.
( Resistive Touch Panel )
A resistive touch screen panel is composed of several layers, the most important of which are two thin, metallic, electrically conductive layers separated by a narrow gap. When an object, such as a finger, presses down on a point on the panel's outer surface the two metallic layers become connected at that point: the panel then behaves as a pair of voltage dividers with connected outputs.
POS, Kiosk ,LCD Module, IA Product, E-Book,Toy, Calculator ,Electric calender, Game machines
Cost effective solution and easy to use resistive touch screen technology, which can be operated in commercial, medical or industrial applications and children's toys. We offer digital, analog, SAW panel and capacitive touch screens.
A resistive touch screen panel is composed of several layers, the most important of which are two thin, metallic, electrically conductive layers separated by a narrow gap. When an object, such as a finger, presses down on a point on the panel's outer surface the two metallic layers become connected at that point: the panel then behaves as a pair of voltage dividers with connected outputs.
POS, Kiosk ,LCD Module, IA Product, E-Book,Toy, Calculator ,Electric calender, Game machines
Cost effective solution and easy to use resistive touch screen technology, which can be operated in commercial, medical or industrial applications and children's toys. We offer digital, analog, SAW panel and capacitive touch screens.
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