Projector Test Patterns — Calibrate & Set Up Any Projector

Open the Focus Grid pattern in fullscreen. Adjust the focus ring until the diagonal lines and corner crosshairs are razor-sharp at the centre, then walk to each corner to verify edge sharpness. If corners are blurry, adjust focus to a compromise that minimises edge softness.

Yes. The phone just opens a URL (encoded in the QR) and gets a touch UI — no install, no permissions, no Bluetooth pairing. Communication uses WebRTC peer-to-peer over our self-hosted PeerJS server.

Plain solid colour fields are exactly what you want for projector calibration: they expose dust, panel uniformity issues, hot spots, vignetting, and chromatic shifts that gradient or photo content would mask. Drop into any colour and walk slowly across the screen — anomalies become obvious.

On 3-panel projectors (LCD, LCoS, 3-chip DLP) the red, green and blue panels can drift slightly out of alignment, causing colour fringing on text and edges. The Convergence pattern shows fine R, G, B grids overlaid — if you see colour fringes between them, adjust the convergence menu in your projector OSD.

Yes — the page is cached by our service worker. Once you have visited it online, fullscreen patterns will work offline (the phone-remote feature still needs internet on both ends since it uses WebRTC signalling).