In the capacitive touch screen on a layer of EMI shielding film is an effective means of electromagnetic shielding, this shielding film can reduce or eliminate the influence of external electromagnetic fields on the internal signal of the touch screen, effectively block or attenuate the interference of the external electromagnetic wave, to protect the internal electronic components of the touch screen and the signal transmission is not affected, to improve the stability and reliability of the touch screen, so that the touch control is more accurate and smooth.
The choice of EMI shielding film:
1. Material: EMI shielding film is usually made of metal grid, conductive polymers and other materials, which have good conductivity and electromagnetic shielding properties.
2. Transparency: In order not to affect the visual effect of the touch screen, EMI shielding film needs to have good transparency.
3. Thickness: under the premise of guaranteeing the shielding effect, EMI shielding film should be as thin as possible, in order to reduce the impact on the touch of the touch screen.
4. Compatibility: When choosing EMI shielding film, you need to consider its compatibility with the touch screen, to ensure that the paste will not affect the normal use of the touch screen.
EMI shielding film application scenarios:
1. Industrial environment: in the industrial production site, the electromagnetic environment is complex, EMI shielding film can protect the touch screen from electromagnetic interference.
2. Medical equipment: medical equipment is very sensitive to electromagnetic interference, EMI shielding film can improve the stability and safety of medical equipment.
3. aviation and marine fields: in the aviation and marine fields, EMI shielding film can protect the touch screen from electromagnetic interference.
In the aviation control panel system, the touch screen with EMI shielding film has multiple key functions and roles, but also faces some challenges. The following is a comprehensive analysis of their functions, roles, challenges and solutions.
The role of touch panels with EMI shielding film in the aviation field:
1. Reduce electromagnetic interference: EMI shielding film on the touch screen can effectively block or absorb electromagnetic waves from the external environment, such as radar, radio waves, etc., so as to reduce interference with avionics equipment. This is essential to ensure the stable operation of communication, navigation, control and other systems during flight.
2. Protection of sensitive components: aviation control panel integrated a large number of electronic components sensitive to electromagnetic interference, such as microprocessors, sensors, etc.. The application of EMI shielding film can effectively protect these components from external electromagnetic interference, to ensure their normal operation.
3. Ensure the quality of signal transmission: in the complex electromagnetic environment of the aviation field, the use of EMI shielding film can ensure the quality of signal transmission between the touch screen and the control system to reduce the electromagnetic interference caused by the loss of the signal or the phenomenon of error code.
4. Enhance the stability of the system: reduce electromagnetic interference also means to improve the stability of the entire aviation control panel system, reduce the risk of system failure due to interference, thus ensuring the safety of flight.
5. Improve touch response speed: By reducing electromagnetic interference, the response speed of the touch screen is improved, making the pilot operate the control panel more smoothly and quickly.
6. Enhance the visual effect: some high-end EMI shielding film also has light transmission, can ensure that the shielding effect at the same time, to maintain a good visual effect, enhance the pilot's operating experience.
EMI shielding film applied to the touch screen challenges:
1. Weight limitations: the aviation field has strict limitations on the weight of equipment to reduce the burden on the aircraft and improve fuel efficiency. Although the EMI shielding film is thin, but in large-scale applications still need to consider its impact on the overall weight.
2. High cost: High-performance EMI shielding films are usually costly and can increase the manufacturing cost of aviation control panel systems.
3. Material selection: need to find both good EMI shielding performance, but also meet the aviation field of lightweight, high temperature, corrosion resistance and other requirements of the material.
4. Technical bottleneck: how to maintain high light transmittance while achieving excellent electromagnetic shielding effect is a major challenge for the current technology.
5. Extreme environments: aviation control panels need to work in extreme environments, such as high and low temperatures, high humidity, strong radiation, etc., which puts forward higher requirements for the durability of electromagnetic shielding film.
6. Long-term stability: need to ensure that the EMI shielding film in the long-term use of stable performance, there will be no aging, shedding and other issues.
Specific examples of electromagnetic shielding film applications:
In the aviation control panel system of a certain aircraft, a 15.4-inch touch screen with EMI shielding film (customised by WIWO) is used. The film consists of conductive polymers, metal grids and transparent films, which provide excellent electromagnetic shielding performance while maintaining good light transmission and lightweight characteristics. In practical applications, the EMI shielding film effectively reduces interference from radar, radio waves and other electromagnetic waves during flight, safeguards the stable operation of communication, navigation, control and other systems, and enhances the safety and reliability of flight. At the same time, its high light transmittance also ensures that pilots can clearly see the information on the touch screen during operation, enhancing the user experience.
