7 inch capacitive touch screen with Arduino
Projected Capacitive Touch (PCT) technology is a capacitive technology which permits more accurate and flexible operation by etching the conductive layer. An XY array is formed either by etching a single layer to form a grid pattern of electrodes, or by etching two separate, perpendicular layers of conductive material with parallel lines or tracks to form the grid.Applying voltage to the array creates a grid of capacitors. Bringing a finger or conductive stylus close to the surface of the sensor changes the local electrostatic field. The capacitance change at every individual point on the grid can be measured to accurately determine the touch location. The use of a grid permits a higher resolution than resistive technology and also allows multi-touch operation. The greater resolution of PCT allows operation without direct contact, such that the conducting layers can be coated with further protective insulating layers, and operate even under screen protectors, or behind weather and vandal-proof glass.
Model Number | CSB070GG334 |
Structure | Glass+Glass |
Cover Glass Dimension | 195.6±0.1*130±0.1*3.0±0.1MM |
Sensor Size | 163.5±0.2*99.85±0.2*0.7±0.1MM |
Cover Lens VA | 154.44±0.2*86.23±0.2MM |
ITO Glass | 0.7MM |
Cover Glass | 3.0MM |
Total Thickness | 3.9±0.12MM |
Surface Hardness | ≥6H |
Transparency | ≥85% |
IC | FT |
Interface of CTP | IIC |
Touch Points | 5-10 Points |
Operating Temperature | –20℃~70℃ ≤90%RH |
Storage Temperature | –30℃~80℃ ≤90%RH |
CTP used in Banking & Finance
The surface capacitive is a thin layer of electrodes which lied under a glass surface covered with a protective layer. Four electrodes on the corner of the panel are providing electric voltage to the film. When a conductive material is near the electrode film, there's a change of the electrostatic capacity. Measuring these changes, the controller figures out where a touch has occurred.
CTP used in system integration
Industrial monitors also found a wide range of applications. They are an important element of automation systems. They take on the functions of visualization and control through the touch screen. Various mounting options and an extended temperature range make it possible to create flexible automation solutions using an industrial monitor. Military touch screens also belong to this group.
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