AAXA Technologies P4 Pico Projector Review
The AAXA Technologies P4 falls towards the bottom of our pico brightness comparison. We find this test to be one of the most important for pico projectors because none of them get that bright. All picos display dim pictures, compared to their full-sized projector counterparts. During testing, we found that the brighter the picture, the more we enjoyed what we saw, even before we tested for color quality and grayscale accuracy.
This low peak brightness is one of many reasons to consider other portable projectors.
We change the area of black shown on the screen, measure the black level, and record any differences. You can see that the black level gets brighter as the area decreases. This trend is expected and is often a detriment of projectors. However, the increase is very slight, showing that the black level is maintained rather well no matter how much of the screen is filled with black.
Using nine different points on the screen, we test to see if the peak brightness falls off significantly from the brightest point at the center. The largest difference we measured was a 10% dimming in the bottom left corner, which is not very much at all. The AAXA Technologies P4 projection is very uniform.
The left side of this graph has a concentration of peaks and valleys when it should be smooth like the right side of the graph. Each one of these bumps represents an inaccurate reproduction of the input signal along the grayscale spectrum from dark to light.
This means that for a given gray value, the P4 could not produce the correct brightness, showing something either brighter or dimmer instead. The result will be a loss of fine detail in the darker parts of the picture, like shadows and dark clothing.
The middle and right side of the graph, representing the middle gray and white values, show a smooth line that increases at a nearly optimal rate. The middle grays and white values will be full of detail while the shadows will look incorrect.
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