How Much Do You Know About Pico Projector
Pico projectors are very small and compact projectors that usually run with a battery, thus freeing them from the wall outlet. This makes them a perfect companion for the new mobile generation. Historically, Compact Projector have failed to gain a substantial foothold among consumers and for good reason.
One thing to keep in mind is that LED pocket projector are not intended to compete with your standard Home Theater projectors. They have a very specific roles and as you will see below, pico projectors fill a niche that sorely needs filling.
Older generation pico projectors had very low lumen output, the image was easily washed out with the slightest amount of ambient light and battery life left a lot to be desired. Far from an ideal situation and one that left most consumers less than impressed. You will be glad to hear that modern technology offers many magnitudes of improvement over those earlier models and opens the way for pico projectors to finally come into their own.
How does a pico projector work?
There are several companies developing and producing pico projectors, and there are 3 major technologies: DLP, LCoS and Laser-Beam-Steering (LBS).
DLP and LCoS use a white light source, and some sort of filtering technique to create a different brightness and color on each pixel:
DLP (Digital Light Processing) - pioneered by TI, the idea behind DLP is to use tiny mirrors on a chip that direct the light. Each mirror controls the amount of light each pixel on the target picture gets (the mirror has two states, on and off. It refreshes many times in a second - and if 50% of the times it is on, then the pixel appears at 50% the brightness). Color is achieved by a using a color wheel between the light source and the mirrors - this splits the light in red/green/blue, and each mirror controls all thee light beams for its designated pixel.
LCoS (Liquid Crystal on Silicon): an LCoS projector uses a small liquid-crystal display (LCD) to control how much light each pixel gets. There are two basic designs to get color: Color-Filter (CF-LCoS) which uses 3 subpixels, each with its own color (RGB) and a Field-Sequential-Color (FSC) which uses a faster LCD with a color filter - so you split the image for the 3 main colors (RGB) sequentially and you refresh the LCD 3 times (once for each color). The light source for the LCoS can be LED or diffused laser.
Laser-Beam-Steering (LBS) projectors are different, creating the image one pixel at a time, using a directed laser beam. You start with 3 different lasers (Red/Green/Blue), each at its required brightness, which are combined using optics, and guided using a mirror (or two mirrors in some designs). If you scan the image fast enough (usually at over 60Hz), you do not notice this pixel-by-pixel design.
The different types of pico projector
There are 4 basic types of pico projectors:
Stand-alone: these receive the input via a cable (A/V, USB, etc) and cannot display anything unless you use another device to stream the video signal.
USB projector: stand alone projectors that use USB for both power and data, and so require a laptop (or tablet). They are the smallest projectors as they do not include a battery.
Media-player: projectors that include on-board memory (or a memory-card slot) and can play files directly from the memory (usually photos, videos and sometimes office documents too). This is really useful for some people, but file format support and lack of convenient controls sometimes make media player projectors less useful then they could have been.
Embedded projector: in this case the light-engine is embedded inside a mobile device such as a phone, camera, laptop, tablet or PDA.
About Jimi Electronics Co.,Ltd
Jimi Electronics Co.,Ltd, located in NanShan District, Shenzhen. As a leading and advanced wireless communication solution provider in China. Our company is a leading supplier of pocket projectors, Smart Home Products, Smart GPS Navigation, Smart Rearview Mirror DVR and GPS Tracker, etc., with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs.
http://www.jimilab.com/blog/
One thing to keep in mind is that LED pocket projector are not intended to compete with your standard Home Theater projectors. They have a very specific roles and as you will see below, pico projectors fill a niche that sorely needs filling.
Older generation pico projectors had very low lumen output, the image was easily washed out with the slightest amount of ambient light and battery life left a lot to be desired. Far from an ideal situation and one that left most consumers less than impressed. You will be glad to hear that modern technology offers many magnitudes of improvement over those earlier models and opens the way for pico projectors to finally come into their own.
How does a pico projector work?
There are several companies developing and producing pico projectors, and there are 3 major technologies: DLP, LCoS and Laser-Beam-Steering (LBS).
DLP and LCoS use a white light source, and some sort of filtering technique to create a different brightness and color on each pixel:
DLP (Digital Light Processing) - pioneered by TI, the idea behind DLP is to use tiny mirrors on a chip that direct the light. Each mirror controls the amount of light each pixel on the target picture gets (the mirror has two states, on and off. It refreshes many times in a second - and if 50% of the times it is on, then the pixel appears at 50% the brightness). Color is achieved by a using a color wheel between the light source and the mirrors - this splits the light in red/green/blue, and each mirror controls all thee light beams for its designated pixel.
LCoS (Liquid Crystal on Silicon): an LCoS projector uses a small liquid-crystal display (LCD) to control how much light each pixel gets. There are two basic designs to get color: Color-Filter (CF-LCoS) which uses 3 subpixels, each with its own color (RGB) and a Field-Sequential-Color (FSC) which uses a faster LCD with a color filter - so you split the image for the 3 main colors (RGB) sequentially and you refresh the LCD 3 times (once for each color). The light source for the LCoS can be LED or diffused laser.
Laser-Beam-Steering (LBS) projectors are different, creating the image one pixel at a time, using a directed laser beam. You start with 3 different lasers (Red/Green/Blue), each at its required brightness, which are combined using optics, and guided using a mirror (or two mirrors in some designs). If you scan the image fast enough (usually at over 60Hz), you do not notice this pixel-by-pixel design.
The different types of pico projector
There are 4 basic types of pico projectors:
Stand-alone: these receive the input via a cable (A/V, USB, etc) and cannot display anything unless you use another device to stream the video signal.
USB projector: stand alone projectors that use USB for both power and data, and so require a laptop (or tablet). They are the smallest projectors as they do not include a battery.
Media-player: projectors that include on-board memory (or a memory-card slot) and can play files directly from the memory (usually photos, videos and sometimes office documents too). This is really useful for some people, but file format support and lack of convenient controls sometimes make media player projectors less useful then they could have been.
Embedded projector: in this case the light-engine is embedded inside a mobile device such as a phone, camera, laptop, tablet or PDA.
About Jimi Electronics Co.,Ltd
Jimi Electronics Co.,Ltd, located in NanShan District, Shenzhen. As a leading and advanced wireless communication solution provider in China. Our company is a leading supplier of pocket projectors, Smart Home Products, Smart GPS Navigation, Smart Rearview Mirror DVR and GPS Tracker, etc., with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs.http://www.jimilab.com/blog/
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