Picoprojector Technologies: Seeing the Big Picture

Ian Wallhead, Roberto Ocaña, Tomi Jouhti and Vili Sikio

Picoprojectors seem to offer the impossible: They are as small as a mobile phone with a screen at least as big as a laptop. This article compares four commercial devices.



Aaxa P2

Technology: CF LCoS
Contrast ratio: 79
Flux [spec]:
22.2 lm [33 lm]
Power consumption:
White: 19.0 W
Black: 19.0 W
Video: —
Lumens per watt:
1.2 lm/We

Aaxa L1

Technology: CS LCoS
Contrast ratio: 175
Flux [spec]:
9.9 lm [20 lm]
Power consumption:
White: 6.3 W
Black: 6.3 W
Video: 0.5 W
Lumens per watt:
1.6 lm/We



Optoma PK201

Technology: DLP
Contrast ratio: 1,724
Flux [spec]:
16.8 lm [20 lm]
Power consumption:
White: 5.7 W
Black: 5.7 W
Video: 1.0 W
Lumens per watt:
2.9 lm/We

Microvision show WX+

Technology: LBS
Contrast ratio: 9,285
Flux [spec]:
12.5 lm [15 lm]
Power consumption:
White: 4.9 W
Black: 3.4 W
Video: 0.4 W
Lumens per watt:
2.6 lm/We

Predicted to be the next big gadget, picoprojectors may soon be embedded in a wide range of products, including mobile phones, laptops and cameras. There is currently a three-horse race of competing technologies: liquid crystal on silicon (LCoS), digital light processing (DLP) and laser beam scanning (LBS). We studied four commercial picoprojectors to quantify their differences: an Aaxa P2 color-filter LCoS, Aaxa L1 color sequential LCoS, Optoma PK201 (DLP) and a Microvison Show WX+ (LBS). (The two Aaxa models have since been discontinued, but they are still representative of existing LCoS technology.)

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