![]() To enhance this, an infrared laser diode is placed at the near bottom of the device. However, this is just a displayed keyboard that cannot help type because it has no means of communicating with the device. For magnification to a user friendly size keyboard, special optical lenses are used. The diffraction through the optical element is a tiny image of a full QWERTY keyboard that is magnified and projected once the light goes on. There is usually a diffraction within an optical element placed on the diode that the light shines through. The design was adopted from typewriters that have been in use since the late 19th century. The conventional keyboard is also known as a QWERTY keyboard because the first letters on the key board are Q, W, E, R, T and Y. The surface should be flat in order to make typing much more easier. The device has a small red diode laser that projects a full QWERTY keyboard on a flat surface. Unlike in the normal keyboards used at home where switches close with every keystroke and translate into a command, the laser keyboards use infrared technology. The surface that it is projected on has to be non-reflective to avoid inconveniencing the user. The projector is usually a small device the size of a small phone, which sits a few inches from where you want the laser keyboard to display. A laser keyboard is the latest in projection technology that wirelessly displays a virtual keyboard outline onto a flat surface, allowing you to type almost anywhere with no cords or bulky equipment.
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