So far, there have only been a few round displays, and then they usually only have a size of two inches. Until now, you have searched in vain for touchscreens or larger diameters. Waveshare now offers an IPS display with a 4-inch diameter (4-inch DSI Round Touch Display), which also supports touch inputs. The display is connected to the DSI connector of the Raspberry Pi single-board computer, the touchscreen communicates via I2C.
On the back of the display, in addition to the plug-in connections, there is also the option of setting the I2C address. In this way, two of these display units can be controlled on the same bus of a Raspberry Pi.
The connections for power supply, display and touchscreen are on sockets on the back of the display.
The resolution of the display is 720 × 720 pixels with a maximum frame rate of 60 Hertz and a viewing angle of 170 degrees. The surface is made of tempered glass. The touchscreen works capacitively and with 10-point recognition. The outer diameter is 128 mm with a depth of 17 mm. There are four spacers on the circuit board on the back, onto which you can screw either a Raspi 3 or Raspi 4.
The Raspberry can be piggybacked onto the display.
The screen is powered by the Raspi. Waveshare provides a detailed wiki for hardware and software installation. There are also preconfigured Linux images for Raspberry Pi 3 and 4. The brightness and orientation of the image can be controlled via software and the touchscreen.
The brightness can be adjusted and the image content rotated by touch.
The display costs around 90 US dollars from the manufacturer, and it is available from Amazon shops under various names from around 120 euros.
(Link on https://www.waveshare.com/4inch-dsi-lcd-c.htm) (hgb)
#displays #touchscreen #Raspberry #Pis