-The 8 inch capacitive Usb Touch Screen Raspberry Pi：Industrial application partially, Glass+Glass structure, strong anti-jamming performance,Special surface treatment --AG AR AF,with cypress touch controller ic can support glove function, water-based function and thick cover function, mainly used in outdoor equipment, pure industrial equipment, medical equipment and smart home appliances equipment, can support depth customization, including structural parts and surface special treatment;
-This 8-inch capacitive touch screen module product, with a surface of 3mm tempered glass , it can meet the test standards of IK8, it has good impact resistance, display interface is RGB, and independent back light supply, the module adopts the air bonding process, the capacitive touch screen interface is IIC, adopts the Cypress solution, It has excellent anti-interference performance. it is more suitable for some applications with complex application environment, and the application surface is very wide.
-The 8 inch capacitive touch screen can be contacted to Raspberry Pi by USB and HDMI interface,the capacitive touch panel with 6pins IIC interface,we can provide "IIC TO USB" bridge board;the 8 inch TFT LCD Screen with RGB interface,can provide "RGB TO HDMI" driver board.
| Model Number | HX0801804 V1.0 | PCAP Number | HX0801803 |
| Brand | Grahowlet | Interface Type | I2C/USB |
| Size | 8.0 inch | Structure | Glass+Glass |
| Operating Temperature | -20℃ ～ 70℃ | Controller IC | CYTMA568 |
| Storage Temperature | -30℃ ～ 80℃ | Touch Points | 1~10 points |
| Bonding workmanship | Air Bonding | Power Supply Voltage | 2.8V ～ 3.3V |
| Outline Dimension | 193.00(W)x151.00(H)x10.45(D)mm | TFT Number | HX080NA-06A-33B |
| Viewing Area | 163.00(W)x122.50(H)mm | Resolution | 800x600 |
| Active Area | 161.00(W)x121.50(H)mm | Interface Type | RGB/HDMI/VGA |
| Support Systems | Windows/Android/Linux etc. | Luminance | 900 cd/㎡ |
| Warranty | 1 year | Viewing Angle | 70/70/50/70 |
Technical Q&A
Q: Is there any suggestion regarding the capacitive touch screen module solutoin directly used by raspberry pi and orange pi?
A: We have some mature projects cases and the best way is to connect the touch screen directly through USB interface to the Raspberry Pi or the orange Pi, and the display can be directly connected through HDMI interface, this way the whole solution can be implemented through plug and play. Large size touch screen will be designed directly with USB interface, small size is general designed with IIC interface, so we will do is to provide the board which changes the IIC into USB. however, customers need to contact our technicians to check the configuration and software system. For display, we can provide RGB to HDMI, LVDS to HDMI, MPI to HDMI, EDP to HDMI and other driver boards to realize the connection with Raspberry Pi and orange pi;
Q: What is the principle of capacitive touch screen to achieve multi-touch?
A: When the finger touches the capacitive screen, it affects the coupling between the two electrodes near the touch point, thus changing the capacitance between the two electrodes. When detecting the mutual capacitance, the lateral electrodes sequentially emit excitation pulse signals, and all the longitudinal electrodes receive signals at the same time, so that the capacitance values of all the intersections of the lateral and longitudinal electrodes can be obtained, that is, the capacitance of the two-dimensional plane of the entire touch screen. According to the two-dimensional capacitance change data of the touch screen, the coordinates of each touch point can be calculated. That is, the real multi-point coordinates can be calculated to realize multi-touch;
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