When we are purchasing a projector, what is the difference between choosing the off-axis and the non-off-axis?

In the specification of projector, usually we could see the words "100% off-axis" or "80% off-axis". Then what does this function mean? Do we have to choose the off-axis projectors?

First of all, let's take a look at the definition of off-axis. Off-axis is a function of the projector. This function allows the device to project a complete image on the wall or curtain without being fixed on a table with the bracket. The off-axis is actually a function of DLP display technology from the TEXAS, which solves the problem of projector placement.

As shown in the figure above, that is the difference between the images projected by the projector with and without the off-axis.

We could see from the figure that when we need to project a complete image on the wall or a curtain, the projector without off-axis needs to be placed near the wall and meanwhile near the edge of the desktop, because it requires that the projected light is not blocked by the desktop. On the contrary, the placement of the projector with the off-axis is relatively free, as long as it is placed on the flat desktop.

Of course, the degree of off-axis of the projector is also differentiated by percentage.

Also as shown in the figure above, the left side does not have an off-axis, that is, a projector with 0% off-axis. Half of the projected image is above the horizontal line and the other below. And the projector in the middle with 80% off-axis, most of the projected image is above the horizontal line, but still a small part is below the horizontal line. While regarding the 100% off-axis projector on the right side, the image it projected is all above the horizontal line. 

To sum up, considering the portability of the projector placement and the integrity of the projected image, the 100% off-axis projector would be a better choice. The projectors produced by Hotus are equipped with the DLP display technology of TEXAS. What’s more, all of the projectors are 100% off-axis projectors. Any doubts troubling you please feel free to contact with our Tel/WhatsApp/Skype at “+8613825293291”.