ViewSonic LS831WU Ultra Short Throw WUXGA Laser Projector – 4500 ANSI Lumens, 0.25 Throw Ratio, HDBaseT, IP5X

The ViewSonic LS831WU is a 4,500-lumen WUXGA ultra short throw laser projector for classrooms, collaboration rooms, and exhibition displays. With a 0.25 throw ratio, IP5X-rated sealed optics, HDBaseT, and a 20,000-hour laser, it creates 70 to 200-inch images from directly above the screen.

Deep-Dive Story & Problem/Solution

Interactive Spaces Need the Projector Out of the Way

When people write on, touch, or stand near the display surface, any projector behind them creates shadows and glare. Ultra short throw placement is the only arrangement that keeps the light path clear.

The LS831WU’s 0.25 throw ratio lens sits above the screen and projects downward at a steep angle. Users can work at the board with no shadow, and the 16ms response suits interactive whiteboard use.

The laser phosphor engine delivers 4,500 ANSI lumens with a 3,000,000:1 dynamic contrast ratio and lasts up to 20,000 hours. Its IP5X sealed design limits dust ingress, which protects brightness in schools and public venues.

Large Images From Inches Away

Supported image sizes range from 70 to 200 inches, making the projector suitable for wide whiteboards and edge-blended exhibit walls.

Installation-Grade Connectivity

Two HDMI ports, HDBaseT, RJ-45, RS-232, composite, S-Video, USB-A, and audio in/out integrate with AV control systems. Noise is 34dB normal and 29dB in Eco mode.

Setup Instructions

How to Install the ViewSonic LS831WU

1. Fix the wall mount above the screen according to the 0.25 throw ratio and offset specified for your image size.
2. Connect HDMI or HDBaseT sources plus network or serial control.
3. Focus the image and fine-tune geometry with the keystone and corner adjustment controls.
4. Choose normal or Eco brightness to suit the room.