Wednesday, 27 March 2019

The Interface Series: Parallel Interface

The parallel interface is an interface which sends up to 8 bits of data for each of the three colours; red, green and blue every clock cycle between a processor and a display. With up to 24 bits in total transmitted every clock cycle, a clock rate of up to 50 MHz can be achieved.

What are the benefits?

The parallel interface has a low cost due to the maturity of the technology and is widely accepted and used within the industry. It works with medium to large displays and has bandwidth capabilities of up to 1.2 GB/sec.

What are the drawbacks?

Due to 24 bits of data being transmitted of red, green and blue, up to 24 pin-outs are required from your processor, all 29 pins will output a fast clock signal which can create electrical noise and can cause issues confirming to EMC standards, to get around this issue you should consider moving to a LVDS display.

To find out parallel interface and how SCHURTER Electronics can help find your business solution, email our team today or give us a call on 01296 319 000.

Thursday, 21 March 2019

Self-Capacitance vs Mutual-Capacitance

What's the difference?

Self-capacitance measures the absolute sensor capacitance where the mutual-capacitance measures the interaction between two electrodes.

What are the benefits of Self-Capacitance?

The self-capacitance offers a simple sensor design and can be used in a range of design shapes such as round, heart and rectangular. This method is ideal for 15 touch keys and below as each sensor needs its own connection to a controller IC.

What are the benefits of Mutual-Capacitance?

Unlike the self-capacitance, the mutual-capacitance method has a complex sensor design. The double ITO layer, or crossings in silver tracks, lends it sophistication to the needs of a higher number of touch keys. As  result of this method, the mutual capacitance is deemed 'good' for water resistance. Mutual-capacitance also enables a multi touch feature which allows gesture recognition such as pinch, zoom and rotate.

Which method is best suited for my business requirements?

While the mutual-capacitance is mainly used for touchscreens, the self-capacitance is used for smaller, less complex products such as individual buttons and sliders.

To find out how SCHURTER Electronics can help find your business solution, email our team today or visit our website.