— Projector Throw · Laser TV
UST living room - 120-inch ALR screen
Problem. A living room wants a 120-inch screen without a ceiling mount, using an ultra-short-throw laser TV cabinet and an ALR screen.
Answer. A fixed UST lens keeps the projector close to the wall, so the planning question changes from ceiling throw to cabinet depth, screen flatness and 16:9 alignment. This preset opens the calculator on a 120-inch 16:9 UST configuration.
02 / In depth
How this preset reads — the engineering view.
Ultra-short-throw projection is not a normal throw-distance problem. The lens ratio is fixed, the cabinet must sit square to the screen, and even small wall waves can create visible geometry errors. This preset is tuned for the living-room case where the projector replaces a large TV rather than a ceiling-mounted cinema projector.
The 120-inch 16:9 screen is large enough to feel cinematic but still inside the common UST laser-TV range. The calculator loads a current UST model so the throw geometry, brightness estimate and feasibility warnings start in the right product class.
Pair the projector with a fixed-frame ALR screen rather than a casual painted wall. ALR screen choice affects daytime contrast more than raw lumen count, and screen flatness is the difference between a premium-looking install and a visibly warped image.
Out of scope: furniture depth, centre-channel speaker clearance, power outlet placement and HDMI/eARC routing. Those are installation details, but this preset gives the first-pass screen and projector geometry that drives them.
What this preset deliberately does not solve
- UST alignment is physical: cabinet position and screen flatness matter more than zoom range.
- Use 16:9 for UST planning unless the projector vendor explicitly supports wider aspect handling.
- ALR screen choice has a large effect on living-room daytime contrast.
How this preset differs from its siblings
The home-theatre preset assumes a ceiling or rear-shelf standard-lens projector in a treated room. This UST preset assumes a living room, a fixed 16:9 laser-TV lens and cabinet placement near the screen. The screen size can be similar, but the installation failure modes are completely different: furniture depth, wall flatness and ALR pairing replace mount throw and optical zoom.
02 / What that means, drawn
Side view, drawn to one scale in both directions. The screen is 2.66 m wide by 1.49 m high, and the projector stands 43 cm from it. The current zoom position is what the projector is drawn at. EH-LS800B has a fixed lens, so it allows one mount position at this image width, 43 cm from the screen, not a window of them. The projector sits exactly on the near limit of that window — inside it, with no room to move closer.
03 / Hydrated calculator
Try the configuration — live.
The calculator below is preloaded with this preset’s state. Adjust any input — your URL stays shareable.
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Brief us on the project — with this configuration.
Presets are a typology starting point. The brief wizard captures the room geometry, programme and constraints we need to translate this configuration into a real design.