Optoma PK230R 4K UHD Laser Projector (4500 Lumens)

Optoma PK230R 4K UHD Laser Projector

The Optoma PK230R is a 4K UHD laser projector in Optoma DuraCore range, specified by the manufacturer datasheet at 4,300 lumens of brightness with a 3840 x 2160 image from a DLP display system. It is a standard throw installation model rather than a portable unit: a 1.6x manual zoom lens with a 1.4:1 to 2.24:1 throw ratio, a screen size range of 30 to 300 inches and control connections for networked AV systems place it in meeting rooms, classrooms, lecture spaces and larger home installations. The laser light source is rated for 30,000 hours in Eco mode, which is the central ownership argument for a projector that may run all day in a commercial environment.

Key features

• Resolution: 4K UHD 3840 x 2160, DLP technology
• Brightness: 4,300 lumens per Optoma datasheet
• Contrast ratio: 300,000:1, 2,000,000:1 dynamic
• Light source: laser, rated 30,000 hours in Eco mode
• Optics: throw ratio 1.4:1 to 2.24:1, 1.6x manual zoom
• Connections: 2 x HDMI 2.0, VGA in, RJ45 and RS232 control, 12V trigger
• Screen size: 30 to 300 inches

Brightness, contrast and image geometry

At 4,300 lumens the PK230R is bright enough to keep presentations, data and video legible in rooms with controlled but not eliminated ambient light, while the 4K UHD pixel count keeps fine text sharp when the image is scaled up to the larger end of its 30 to 300-inch range. Optoma quotes a native contrast ratio of 300,000:1 and a dynamic figure of 2,000,000:1, with 75 percent brightness uniformity across the image. The native aspect ratio is 16:9, with 4:3, 16:10 and other aspect handling available for mixed source material. Horizontal scan rates run from 15 to 150 kHz and vertical scan from 24 to 240 Hz, covering a wide span of computer and video timings.

Lens and installation

The zoom range is the practical centre of this design. A throw ratio spanning 1.4:1 to 2.24:1 with a focal length of 20.91 to 32.62 mm lets an installer place the projector at different distances from an existing screen, or fill screens of different sizes in similar rooms from a standard mounting position. Native offset is 114 percent, plus or minus 5 percent, and keystone correction of plus or minus 30 degrees is provided in both horizontal and vertical axes. There is no lens shift, so the mounting position needs to be planned against the offset figure rather than corrected afterwards. Projection distance covers 1 to 10 metres of mechanism travel.

Connections and control

Signal inputs comprise two HDMI 2.0 ports, a VGA input and a 3.5 mm audio input, with outputs including three USB-A 2.0 ports, a 3D sync output and a 3.5 mm audio output. For integration into a managed AV system, RJ45 network control, RS232 and a 12V trigger are fitted, allowing the projector to be monitored, switched and synchronised with a screen or control processor. The sealed DuraCore laser engine is designed to resist dust ingress, which supports long service intervals in classrooms and public venues where filter maintenance is easily overlooked.

The PK230R suits an organisation or home installer who needs one 4K projector body that can be deployed across rooms of different depths, with laser running costs spread over a 30,000-hour Eco mode life instead of repeated lamp purchases. Its specification should be read from the Optoma datasheet figures given here, particularly the 4,300-lumen brightness rating, when comparing it against other models in the same class.