A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen. The most common type of projector used today is called a video projector.
https://en.wikipedia.org/wiki/Projector
Types of pico projectors: 1  Standalone models connect to another device through a USB, HDMI or other cable to display content. 2  USB pico projectors connect to a mobile device, such as a tablet, for both content and power.  Embedded models exist as a hardware module in a mobile device, such as a digital camera or a phone.
http://whatis.techtarget.com/definition/pico-projector
1 USB pico projectors connect to a mobile device, such as a tablet, for both content and power. The lack of a battery means that these are the smallest models.  Embedded models exist as a hardware module in a mobile device, such as a digital camera or a phone.
http://whatis.techtarget.com/definition/pico-projector
AAXA LED Pico Projector with 80 Minute Battery Life, Pocket Size, Mini-HDMI, 15,000 hour LED Life, and Media Player.
https://www.amazon.com/AAXA-Projector-Minute-Battery-mini-HDMI/dp/B005TAXDPK
Part of the Multimedia and graphics glossary: A pico projector is a small hardware device designed to project content from a smartphone, camera, tablet, notebook or memory device onto a wall or other flat surface. Pico projectors are also known as pocket, handheld or mobile projectors and they take a number of formats that work in various ways.
http://whatis.techtarget.com/definition/pico-projector
Pico Projectors, also known as handheld projectors, are companion products for portable devices such as cameras, mobile phones and tablets.
http://www.projectorcentral.com/popular-pico-projectors.htm
Using the latest LED technology, the LED Pico Projector has an operating life of more than 15,000 hours, roughly 10 times that of traditional projector lamps. And an LED projector does not need to worry about bulb changes.
https://www.amazon.com/AAXA-Projector-Minute-Battery-mini-HDMI/dp/B005TAXDPK
These pico projectors provide a convenient way to quickly project the content of these devices onto any surface such as walls, notebooks, or airplane food trays, as well as, a new array of portable projection screens sized and designed for pico projectors and presenter mobility.
http://www.projectorcentral.com/popular-pico-projectors.htm
AAXA LED Pico Ultra-Portable Pocket Projector. The LED Pico is a true pocket projector at just 4.25 x 2.36 x 0.7 in size, the LED-Pico is about the same size as most cell phones, yet is capable of delivering a stunning 60 image in dark environments.
https://www.amazon.com/AAXA-Projector-Minute-Battery-mini-HDMI/dp/B005TAXDPK
Acer projector, 2012. A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers.
https://en.wikipedia.org/wiki/Projector
define pico projector
A pico projector is defined as a small hardware device designed to project content from a smartphone, camera, tablet, notebook or memory device onto a wall or other flat surface. Pico projector is a small hardware device designed to project content from a smartphone, camera, tablet, notebook or memory device onto a wall or other flat surface. A pico projector is a small hardware device designed to project content from a smartphone, camera, tablet, notebook or memory device onto a wall or other flat surface.