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Android pico-projector tablet does it with mirrors

May 1, 2013 — by Rick Lehrbaum 2,265 views

Shezhen, China-based Promate Technologies claims to have created the world’s first tablet-projector. The “LumiTab” sports a modest 1024×600 7-inch IPS screen, runs Android 4.2, and uses a Texas Instruments digital-light-processing (DLP) chip to render “incredibly sharp 1080p HD images” on walls and projection screens, according to the company.

From an Android tablet perspective, the LumiTab has decent, though non-spectacular specs. It’s based on a dual-core, 1.5GHz TI OMAP4460 ARM Cortex-A9 system-on-chip (SOC) along with 1GB RAM, 16GB flash, and a microSD slot for expansion. Unsurprisingly, it does most of its business in a reclined pose, as shown below.

LumiTab is a 7-inch Android tablet with a built-in projector

The LumiTab’s key tablet functionality specs, as listed on its data sheet, include:


  • Dual-core, 1.5GHz TI OMAP4460 ARM Cortex-A9 SOC
  • 1GB RAM, 16GB flash, and a microSD slot
  • 1024×600 7-inch IPS display
  • HDMI video output port
  • 2 megapixel front and rear cameras
  • 802.11b/g/n WiFi and Bluetooth 4.0
  • USB 2.0 high-speed port with OTG support
  • Built-in 3-axis accelerometer
  • Size — 7.9 x 4.5 inches
  • 4800mAh Lithium Polymer power pack
  • Android 4.2 OS

LumiTab connectors and projector features
(click each image to enlarge)

What distinguishes the device, of course, is its integrated pico-projector, which is listed as having the following characteristics:

  • Display technology — DLP
  • Resolution — 854×480 WVGA
  • Illuminant — LED, 20,000 hours lifespan
  • Luminance — 35 Lumens
  • Projection size — more than 100 inches
  • Projection ratio — 1.5

Interestingly, the 854×480 resolution listed above for the device’s DLP (digital light processing) chip would seem inadequate to produce the “incredibly sharp 1080p” output claimed by the LumiTab’s data sheet.

However, as explained on Wikipedia,…

    “In DLP projectors, the image is created by microscopically small mirrors laid out in a matrix on a semiconductor chip, known as a Digital Micromirror Device (DMD). Each mirror represents one or more pixels in the projected image. The number of mirrors corresponds to the resolution of the projected image (often half as many mirrors as the advertised resolution due to wobulation).”

Promate expects the LumiTab to find use both in the office and in the family room, as illustrated below.

LumiTab at work and at home
(source: LumiTab data sheet)

For more information regarding DLP technology, including some interesting videos, visit TI’s How DLP Technology Works page.

As of this posting, Promate had not provided LumiTab pricing or availability details. Further information should eventually appear on the company’s website, or its Facebook page.

(advertise here)

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