raspberry pi 7 inch touch display

Product Description

-Raspberry pi 7 inch touch display：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 7-inch capacitive touch display product is a standard product launched by our company for customers in the industrial field. It can support some special functions and has excellent anti-interference performance. It has black screen printing around and the interface is 8pins IIC. It can also directly export the USB interface through the IIC----USB board to achieve free drive, 1024*600 resolution display screen and LVDS interface, which can be compatible with various common Operation systems, it can be equipped with HDMI/VGA drive board and cable, which is more suitable for flat assemble module structure installation products.

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: Since the Cypress solution capacitive screen can enhance the anti-noise ability, then can we analyze the factors affecting noise from the sensor perspective?

A: The impact of the Sensor on TP performance is huge. In the capacitive touch screen module, the sensor is the sensing element, and the controller IC is the analog-to-digital converter. The sensor quality directly affects the quality of the signal received by the IC. From the structure point of view, sensor is divided into two categories, namely DITO and SITO. From the material point of view, sensor is mainly divided into two categories, namely Glass and Film. DITO uses the lower layer TX for shielding, so no shielding layer is needed. SITO's TX and RX are all on one layer, so you need a shield on the back. Technical improvements can remove the back shield. The Cypress solution uses a DITO structure with a mesh pattern to solve linearity and dangling problems. The SITO structure usually adopts a diamond pattern. This pattern has many problems, and the power supply noise is large, linearity, floating, and poor waterproof performance. The Cypress scheme uses the SITO structure plus a bee pattern to achieve the performance of the DITO structure with a mesh pattern. Because the FLASH process does not support high voltage, it can be seen that other chips in the market need high voltage when it needs to externally boost the chip. In addition to the boost, the Cypress chip adds a lot of algorithms and adopts its own patented SENSOR pattern, so in the letter The noise ratio can be done very well.

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