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Touch screen, also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. When the graphic buttons on the screen are touched, the tactile feedback system can drive various connected devices according to pre-programmed programs, can be used to replace mechanical button panels, and create dynamic audio-visual effects through the LCD screen. As the newest computer input device, touch screen is currently the simplest, convenient and natural way of human-computer interaction. It gives multimedia a new look and is a very attractive new multimedia interactive device. Mainly used in public information query, leadership office, industrial control, military command, video games, ordering songs, multimedia teaching, real estate pre-sales, etc.
From the perspective of technical principles, the touch screen is a transparent absolute positioning system. First of all, it must be transparent. Therefore, it must use material technology to solve the transparency problem. Like digitizers, writing boards, and elevator switches, they are not touch screens. ; Secondly, it is absolute coordinates. It does not need a second action. Unlike a mouse, it is a set of relative positioning system. We can notice that touch screen software does not require a cursor. Cursors affect users. Attention, because the cursor is used for relatively positioned devices. To move a relatively positioned device to a place, you must first know where it is now and in which direction to go, and you need to keep feedback to the user at all times. The position will not deviate.
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