Touch screens are widely used in various places of life. There are many mobile phones, MP3s, and digital cameras that support touch screens. Some expos, shopping centers, cinemas, and other places have also introduced applications of touch all-in-one devices and other products. What is the principle of Multi-touch monitors? Let’s get to know more together.
1、 What is Multi-touch technology
Many touch screens only support single touch and can only recognize and support touch and click with one finger at a time. If two or more points are touched at the same time, they cannot react correctly. The Multi-touch monitors can decompose the task into two aspects: one is to collect multi point signals at the same time, and the other is to judge the meaning of each signal, which is called Gesture recognition, so as to realize the screen recognition of the simultaneous click and touch actions of five fingers.
2、 Principle of Multi-touch technology
The core of multi-touch technology is the suppressed internal total reflection technology. After the beam of light emitted by the LED illuminates the surface of the screen from the touch screen cross-section, it will generate reflection. If the surface of the screen is air, when the angle of incident light meets certain conditions, the light will be completely reflected on the screen surface. But if a substance with a high refractive index presses against the acrylic material panel, the condition for total reflection on the screen surface will be broken, and some of the light beams will pass through the surface and project onto the surface of the fingers. The uneven surface of the fingers causes scattering of the light beam, which passes through the touch screen and reaches the photoelectric sensor. The photoelectric sensor converts the light signal into an electrical signal, and the system obtains the corresponding touch information.
- Multi-touch monitor is a multi point or multi-user interactive operation mode on the same display interface, which abandons the single point operation mode of keyboard and mouse.
- Users can perform single touch with both hands, or touch the screen with different gestures such as clicking, double clicking, panning, pressing, scrolling, and rotating, to achieve arbitrary manipulation and better and more comprehensive understanding of the relevant features of the object.
- We can customize corresponding touch screens, touch software, and multimedia systems according to customer needs; It can be used in conjunction with professional graphics software.