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Raspberry Pi

Custom Display for Raspberry Pi

Raspberry Pi“Two years ago, I began the process of looking for a simple, embeddable display for the Raspberry Pi. When looking for a device, we needed to look for what are termed ‘Industrial’ LCD displays. These tend to have better-quality metrics and guaranteed availability.

In the end we chose an industrial-quality display from our friends at Inelco Hunter Ltd, based in the UK, who were able to create something very special”

Gordon Hollingworth – Raspberry Pi

Customer Brief

To design a TFT display solution to connect directly with a Pi interface board, without using any of the GPIO.  To obtain a TFT display that would tick the following requirements.

  • Pixel quality (sometimes you can see the individual pixel boundaries)
  • Contrast ratio
  • Viewing angle
  • Affordable
  • Lifetime (length of time before the display is no longer going to be manufactured)

Inelco Hunters experience,(over 20 years in display and touch technology) and our in house engineering resource enabled us to provide the ideal solution and meet the stringent requirements of RPi.

Lifetime is one of the most important requirements and considerations when designing any display solution. If a display only has a lifetime of a few months (or the manufacturer is uninterested in guaranteeing a minimum lifetime), the whole development cycle would have to repeated.  There are many suppliers that can offer display technology but few that can guarantee the lifetime of the product.

Inelco Hunter through its extensive supply base were able to offer this guarantee and ensure longevity of supply for the team at RPi.

In addition to the specification requirements RPi required an easy method of connectivity and mounting capability of a PI board on the rear of the screen.

The solution to this problem was to employ both DSI (to avoid using up all the GPIOs) and DPI (easily available screens in suitable resolutions) and a bridge chip/conversion board to convert between the two.

Metal work assembly and mounting holes were designed to suit the PI and the whole solution offered as a complete assembly for Pi to sell.

Inelco Hunters attention to detail and engineering design capabilities enabled us to meet and exceed expectations to offer the following specification to RPi.

  • RGB 800×480 display @60fps
  • 24-bit colour
  • FT5406 10 point capacitive touch screen
  • 70 degree viewing angle
  • Metal-backed display with mounting holes for the Pi

 

“In the end we chose an industrial-quality display from our friends at Inelco Hunter based in the UK, who were able to create something very special”

Gordon Hollingworth – Raspberry Pi

 



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