Posted on April 29, 2019 By Nikki Zelinger
BenQ LK953ST 4K UHD Laser Projector Review Special Features: Short Throw Design, 4K UHD Resolution, Sealed Light Path, Advanced Networking, Multi-Screen Projection and Image Stacking
Though we wouldn’t normally consider a short throw design as being a “special” feature, it feels pertinent to mention in this particular case. In museum and retail environments where this projector may be used for displays or digital signage, having a short throw design puts the LK953ST closer to the screen or wall surface, minimizing the possibility of obstructing the projected image. This can be quite desirable for such spaces!
While most projectors must be installed around 9.5 feet back from a 100” diagonal screen, this projector can be installed as close as 5 feet, 10 inches from the screen surface to produce the same size image. This is not to be confused with a very short throw design, which would use a telescoping wall mount and be placed 2.5 to 3.5 feet back. Theoretically, the LK953ST could use one of these mounts to produce an image of 72” or less, but most installations will find a ceiling mount and 100” or larger image to be satisfactory to their needs.
This BenQ was the only 4K UHD projector in its category within the Classroom Projectors Report, which is something worth mentioning. It was competing against a similar BenQ – the LU950 – which has many of the same features and functions, but is only WUXGA (1920 x 1200) resolution. Its higher resolution makes it well suited for digital signage, museum exhibitions, and scientific applications in engineering and other such fields. This BenQ produces a beautifully sharp image, as demonstrated by this cute cat image from BenQ that I couldn’t help but use.
The BenQ LK953ST has a sealed light path to protect the optics from dust and other particles that might damage the projector and degrade the image. These dust blobs, as mentioned on the previous page, degrade the projected image by causing visible spots and color decay to form over the projected image, and are often costly to clean out. This BenQ’s sealed light path protects the DMD chip, color wheel sensor, laser bank, and other optical components. The BenQ LK953ST also features an Anti-Dust Accumulation Sensor to resist dust buildup by repelling dust that might settle on the IR sensors and cause flickering, abnormal colors, and even shutdown.
The BenQ LK953ST has a multi-screen projection feature! This is particularly useful at conferences, conventions, and other large meetings, where it is common practice to set up multiple projections of the same content, giving the audience multiple angles to view presentation content from. Several projectors can be hooked up to the same source, and the BenQ LU950 does this by using HDMI cables.
This is a significant improvement over the traditional VGA output, as HDMI signals do not decay over distances. Simply hook up one projector to the source with one HDMI, then daisy-chain the HDMIs all the way through your projector lineup. This will allow better accommodation of more people with an improved viewing experience for your large meeting. In addition to multi-screen projection, this same daisy-chain function can be used for image stacking.
Image stacking refers to two or more projectors being stacked, one on top of the other, to produce a brighter image. If you were to stack two BenQ LK953STs, then use the lens shift functions to overlay the images on top of each other, your projected image would measure around 10,000 lumens. Projectors with 10,000 lumen ratings often have a much higher cost than what you would experience buying two of these BenQs. Something to think about if your installation requires more brightness power!
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