These machines have a common characteristic, are equipped with LCD screen was exquisite, any time can be a joy to enjoy wonderful picture, but only for personal use, or several big head in front of such a small screen is not a pleasant thing. In other words, is the screen size limits these devices only applies to personal, if you want to share with friends, watch movies, photos or even information exchange becomes way, this is why manufacturers have always wanted to provide a larger screen for handheld devices. Over the past few years, the phone's dimensions are smaller, but now it has reached a level cannot be reduced, otherwise not bad, it can accommodate screen is small enough to not provide enough information, you can only clear towards the flat evolution, this is why people want to make small equipment for large-screen, or even greater than the size of the machine itself.
Want to let the machine's screen than the machine itself also? it sounds strange, but currently there are two ways to effectively provide the solution. The first is to use the ' curl ' screen can usually rolled up the screen when the collection, use, like reel pull the need as much screen, pull out the big part. You can curl screen now also in development, belongs to the soft electronic technology. In a foreign country, you can already have curl screen manufacturers showcase sample, I believe that next year will see more application.
Another way to let the screen bigger than machine technology, it is that we are familiar with the projector. Projector to the screen, all things, any reflect light as long as you can, of objects can be used to display images, for a small space, or need to move around fairly suitable occasions. Now our common projector called single gun projector, about five years ago it started at a reasonable price in the market, after several years of technology development and prices on campaigns, industry-leading research and development will be changed to make portable projector.
Japan's few manufacturers have shown this type of machine, Korea's Samsung Electronics is also very enthusiastic about this development, Korea, Japan suggested design manufacturers, are probably about Palm size LED to LEDs as the light source, some use LCD or micro Panel LCOS, DLP technology used by some, but limited by power LED will be converted to energy efficiency, not to the battery a long operating, you must Additionally, wire, that is, this can only be easily portable, do not be limited to the wall outlet and some distance.
Laser compact projector challenge
United States has called the Symbol of the company, recently showcased their new one called LPD, LPD means Laser Projection Display laser projection monitor, it may become the latest handheld device display. As the name mentioned, LPD uses a laser source, rather than the popular recently LED light source, however, to carefully distinguish that LED transmit it may be a general lighting, laser, see type, generally do not have specified time refers to General lighting (we could not have anticipated handheld devices used to display the power status LED will shoot laser).
Symbol LDP optical topology
LPD task principle and traditional cathode ray tube television is very similar to the CRT, after the beam injection, through physical mechanism will beam bending a particular direction, above and below the scan back and forth, they constitute a picture of the screen. The disadvantage of the scanning mode is at any time, the entire screen has only one bright spot, but the human eye has the Visual characteristics of interning, so fast enough or can become uninterrupted image, this function is different with LCD, LCD is the entire screen covered with millions of small spot at the task, but the LCD screen and LCD projector can render all the images at the same time. Although LPD and CRT, are used to make up the image scanning mode in use on did more freedom. CRT type out of the electron beam, impact to the back of the smudge of luminescent screen material before converting a human eye visible light, so the CRT is inseparable from the big and heavy glass tube, also can not be installed on your phone. LPD is not the same, LPD shoot out of the laser in the space flight until it is basically retaining screen, the screen must describe how far is the user's freedom, the farther the screen bigger, but brightness dimming, placed near a little, picture quality is great, but the size is only so big.
To laser light reflection in a specific angle, and left and right and down to go out and scan, basically need side can be dual-axis rotation of a mirror, or two-axis rotation of mirror, LPD selected the latter, this is like a kid with a mirror reflection of the Sun, just go look at the mirror, you can hit a wall can move around the Symbol of light points is also using the same technology, but they will mirror the way of control could be improved, thus making a projector.
What is the LPD Pocket?
Compared with ordinary projectors, LPD's task to decide it in such scale machines can do well. First is the issue, because the laser light emitting efficiency is better than high-brightness LED, as long as the small glowing lights can provide enough light, the general use of LED light source for Pocket projector as the need for a high-brightness LED installed in the Panel, but also additional tie beam focus, volume naturally cannot shrink. Since LPD's efficiency is good, does not need to install a large heatsink, eliminates the thermal problem, does not need extra batteries to waste, and reduce the battery size further, more does not require a fan to help heat the power, even the fans are province, is a
Remarkable improvement.Second, it does not have complex optical system, DLP or LCD projector, there are a lot of space inside is ' empty ', so that there is enough space for light turning point, LPD does not have these requirements, the inside of the machine appears to be relatively close. LPD does not require a miniature Panel, just a small MEMS lens, the light passes through reflection later direct injection, in fact, even the camera is not required, nor do they need to increase the focal length of mechanism, nature can lower production costs, and reduce the volume.
Laser projector launch time
In this way, the benefits of laser projector is no less, no expense was not high, the introduction should be to defeat existing projector? but laser projection technology itself has a very difficult to solve the problem, called a Speckle laser spots, basically is caused by laser image will have a lot of small point, interested friends can try to find a very cheap red laser indicator, a spot in the white, hard observation can be seen after some clues. Laser class point that thing on the image quality has a certain impact, whether the Symbol will be commercialized before be improved, or in future versions to improve the author is unknown, but from the portable projector began to be widely discussed, to the introduction of laser compact projector, just a few short years, science and technology progress quickly this is a good example, perhaps the problem will soon have the solution.
In addition, laser projection technology has also renewed hope of projection television. Traditional Projection TV, because back volume is very large, or TV set depth very deep, has been criticized, even projection technology can easily be made large area projection, also require very complex lens design and Projection TV to a staggering price, no mass production. Now the laser projection because is to use scanning mode rendering images, as long as MEMS lenses can turn to the right angle, then reasonable ones in La high laser power can be very large screen.
Rear projection TV
Scanning mode brings an additional benefit is that there is no problem with autofocus lens, so that the projector is not related to any furnishing, laser shot out to form the image, not as present the projector to rotate the camera adjust the focal length, cool, even if the projection cloth curtain is all kinds of strange shape also does not matter, image hit a ball will be distorted. In short, when the laser projector market, will substantially change our impressions for projectors, maybe by then will be the existing variety of display technology shrinks.
The author believes: laser projection technology is still in development stages, its laser projection camp products mostly stays in concept, design elements, and other relatively vague hierarchy. Both in the technical field and display, laser projection is maturity and perfection, but also can not be counted as a mature technology, its products are also need in many aspects of the development and promotion. However, its product design, compact and ease of use, and so reveal certain advantages, as the technology matures, laser projection products and portable video products in connection with even greater development.
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