Screen Size | DISCAS Image Size Calculations | UK

Screen Size Matters – Get It Right Every Time

Is your screen big enough? For most installed displays, the harsh reality is: NO! One of the most common mistakes in display specification is selecting a screen that’s too small. Avoid this issue and ensure maximum clarity and engagement by using the correct standards.

The DISCAS standard is designed to calculate the correct screen size based on user needs. Every application is different, and optimising image size relative to content is essential. While DISCAS calculations involve complex formulas, let the Visual Displays or AVIXA calculators handle the heavy lifting—or simply ask us, and we’ll do it for you!

For a quick rule of thumb, in most meeting, teaching, and presentation spaces, the farthest viewing distance should be no more than six (6) times the image height.

The DISCAS standard was developed under the leadership of Greg Jeffreys, Director and Founder of Visual Displays, alongside an international team of experts over four years. This effort created the definitive ANSI/AVIXA standard for display image size specification. To learn more, visit our Standards page in the Tools & Resources section or contact us directly.

We also offer lunch and learn sessions (worth one AVIXA CTS renewal point) and provide parametric 3D CAD models. These resources allow us not only to calculate the correct specifications for you but also to provide powerful visual and technical assets to support your proposals.

For screens up to 90”, flat-panel displays are the standard choice. However, once you move into the 90” to 100” range, the value proposition changes significantly. Projection technology becomes the preferred solution, offering superior cost-effectiveness - while direct-view LED remains an option, albeit at a much higher price point.

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