— 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.
03 / Hydrated calculator
Try the configuration — live.
The calculator below is preloaded with this preset’s state. Adjust any input — your URL stays shareable.
Projector Throw Calculator
Pick a projector, set distance or screen size, and see the result instantly. Built for quick decisions before final site review.
A planning link — not a quote.
Lens
Ultra Short Throw
Throw Ratio: 0.16 : 1
Units
Throw Distance
Image Size
Zoom Range
Wide angle to telephoto
Throw distance now 43 cm
Estimated Image Brightness
321 nits
Comfortable for brighter rooms or smaller screens.
Vertical Shift
±0%
Max 0 cm from centre
Horizontal Shift
±0%
Max 0 cm from centre
Viewing Distance
4.96 m
THX 4.09 m
Pixel Density
64 PPD
18 PPI on screen
This combination looks workable for first-pass planning. Final placement still depends on the room and screen.
· Other presets for projector throw calculator
Projector Throw · Home Cinema
Home theatre — 120-inch 16:9 screen, 4 m room
A dedicated home theatre with 4 m of throw distance needs a projector that hits a 120-inch 16:9 screen without zoom at the optical limit.
Projector Throw · Corporate AV
Boardroom — 100-inch 16:10 screen, ceiling mount
A corporate boardroom with a 100-inch 16:10 screen and a ceiling-mount throw of 3 m needs a projector specified for daytime ambient lighting.
Projector Throw · Auditorium
Large venue - 180-inch WUXGA screen
A training hall or auditorium needs a 180-inch 16:10 screen with enough brightness and lens flexibility for a long-throw ceiling position.
· Next
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.