Digital,Photo,Frame
Infrared
touch screen in front of the monitor frame to install a circuit board, http://www.global-
circuit board on the screen Quad-arranged IR LED and
infrared receiver tube, one correspondence to form if they had cross-infrared matrix. When users touch the screen, the finger
will be blocked if they had been the location of the two infra-red, so you can determine the location of touch points on the
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screen. Any object can change the contact on the touch infra-red touch-screen operation achieved. Early ideas on the
existence of low resolution infrared touch screen, touch is restricted in manner, and vulnerability to environmental
interference and malfunction of technical limitations, and therefore the market, once fade.
After the second-generation
infrared screen a partial solution to the problem of anti-light interference, the third and fourth generation in improving
resolution and stability of performance has improved, but are not integrated in key performance indicators or a qualitative
leap. However, to understand the touch-screen technology, everyone knows, infrared touch screen is not current, voltage and
electrostatic interference, suitable for harsh environmental conditions, infrared technology is the ultimate touch-screen
product trends. Use of acoustic and other touch-screen technology, materials science has its own insurmountable barriers,
such as single sensor damaged, aging, touch interface, afraid of contamination, destructive use, maintenance complex and so
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on. Infrared touch screen as long as the truly high stable performance and high resolution is bound to substitute other
touch-screen technology products and become mainstream.
The past, infrared touch screen resolution from within the framework
determined by the number of IR on the possession, so lower resolution, the market's major domestic products are 32x32, 40X32,
in addition to light, said infrared-screen environmental factors rather sensitive to changes in light over large when the
miscarriage of justice or even crash. These are precisely the foreign non-infrared touch-screen sales promotion of domestic
agents weakness of the infrared screen.
The latest technology, the fifth-generation infrared screen resolution depends on the
number of IR on the possession, scanning frequency and the difference between the algorithms, the resolution has reached
1000X720, As for the infrared screen in the lighting conditions of instability, from the second-generation infrared touch-
screen start , it has better resistance to light interference to overcome this weakness.
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Photo:
http://www.prlog.org/
