Anders at Embedded World 2025
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Read moreThere are many display technologies, but do you know which one would be better for your application? Particularly when considering optimum viewing angle, resolution and colour contrast. We discuss 2 of the best options, IPS and MVA.
In-Plane Switching (IPS) is a technology that overcomes the viewing limitations and enhances colour reproduction of conventional TFT-LCDs. It is also known as Super TFT.
IPS derives its name from the fact that the liquid-crystal molecules are aligned in parallel with the glass plates, whereas the TN principle adopted in conventional TFT displays is based on perpendicular alignment of the molecules. In an IPS display, the crystals remain oriented in parallel whether the pixel is turned on or off.
Electrodes are placed on the same sheet of glass, instead of on opposing sides, so that when the signal is applied, the crystals rotate horizontally in the same plane.
Multi-Domain Vertical Alignment (MVA) technology differs from both the TN and IPS systems. In the VA system, the liquid crystal molecules are aligned perpendicular to the substrates when no voltage is applied, therefore producing a black image. When voltage is applied, by an electric field, liquid crystal molecules are tilted parallel to the substrate, resulting in a high transmittance of source light.
With no voltage, all the liquid crystal molecules, including those at the boundaries with the substrates, are completely "Vertically Aligned".
In this state, the polarised light passes through the cell without interference by the LC molecules and is then blocked by the front crossed polariser. Because the blockage is complete, the quality of black produced in this way is excellent and the viewer sees this black from all viewing angles.
Benefits of using an IPS
Negatives of using an IPS
Benefits of using an MVA
Negatives of using an MVA
IPS | MVA | |
Colour reproduction | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
Contrast Ratio | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
Viewing Angles | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
Product Cost | £ £ £ £ £ | £ £ £ £ |
Responsiveness | ⭐⭐⭐⭐ | ⭐⭐⭐ |
Power Consumption | ⚡⚡⚡⚡⚡ | ⚡⚡⚡⚡ |
Off-Centre Contrast Shift | ➡️ | ➡️➡️➡️ |
Blurring/Ghosting Effect | ⭐ | ⭐⭐⭐ |
MURA (clouding) Effect | ⭐ | ⭐⭐⭐ |
As with all display choice, knowing your intended audience, user requirements and environmental conditions, all form part of the initial design process, which will ultimately determine the best display at the right price for your application. Before you make your choice, why not speak with us and we will be happy to talk you through your options.