The basic principle of capacitive touch screen is to form a uniform conductive layer on the surface of the screen. When the user's finger or other conductive objects touch the screen, it will change the local capacitance distribution, and the sensor under the screen can detect this change and convert it into an electrical signal, which in turn determines the location of the touch point. It has become the mainstream choice in the market with its high sensitivity, good visual effect and durability. However, any product has its lifespan, and capacitive touch screens are no exception.
So, what are the main factors that affect the service life of capacitive touch screen?
1. Physical environment factors
(1) Temperature
High temperature: capacitive touch screen is more sensitive to temperature, a long time in a high temperature environment will lead to accelerated aging of the internal electronic components, capacitance performance decline, thus affecting the sensitivity and service life of the touch screen. For example, in the summer direct sunlight outdoor environment or closed and poor heat dissipation within the device, the touch screen is susceptible to damage due to high temperature.
Low temperature: Low temperature may cause the touch screen material to become brittle, impact resistance is weakened, but also affect the sensitivity of capacitive sensing, in the extreme low temperature, the touch screen may even appear temporary failure.
(2) Humidity
High humidity: In humid environments, water vapor may seep into the interior of the touch screen, leading to circuit short-circuiting or corrosion and affecting the normal operation of the touch screen. For example, when using the device in places with high humidity such as bathrooms and kitchens, special attention needs to be paid to the moisture-proofing of the touch screen.
Humidity fluctuations: Frequent changes in humidity may also lead to condensation inside the touch screen, which in turn may cause damage.
(3) Dust and dirt
Dust and dirt will adhere to the surface of the touch screen, which not only affects the visual effect, but may also enter the interior through gaps, affecting the accuracy of capacitive sensing, and even scratching the screen surface, shortening its service life.
(4) Light and ultraviolet rays
Prolonged exposure to strong light or ultraviolet rays may lead to aging and discoloration of the plastic or glass material of the touch screen, affecting the appearance and performance.
2. Usage factors
(1) Touch strength and frequency
Excessive force: Users use too much force during operation, which will accelerate the wear and tear of the surface coating of the screen, and may even damage the internal capacitance layer, resulting in the failure of the touch screen.
Frequent touch: long time and high frequency touch operation will make the capacitive touch screen sensing layer and circuitry continue to work, accelerating the aging process.
(2) Improper operation
Touching the screen with sharp objects (e.g. pen tips, keys, etc.) will directly scratch the surface of the screen and damage the capacitive sensing layer.
Pasting inappropriate protective film or stickers on the touch screen may affect the sensitivity of capacitive sensing, and even lead to the touch screen can not work properly.
3. Product quality factors
(1) Material quality
Capacitive touch screen using glass, plastic, conductive materials, such as the quality of the direct impact of its service life. High-quality materials have better abrasion resistance, impact resistance and stability, which can extend the service life of the touch screen.
(2) Manufacturing process
The fineness of the manufacturing process determines the reliability of the internal structure and circuit connections of the touch screen. Advanced manufacturing processes can reduce internal defects and improve the stability and durability of the touch screen.
(3) Design defects
If the terminal equipment in the design of the unreasonable places, such as poor heat dissipation, fragile structure, etc., will affect its service life.
4. Maintenance factors
(1) Regular cleaning
Regular use of soft, clean cloth to clean the surface of the touch screen to remove dust and dirt can maintain the sensitivity and clarity of the touch screen and extend its service life.
(2) Avoid harsh environment
Try to avoid using the touch screen equipment in high temperature, high humidity, dusty or strong direct light environment to reduce the damage of environmental factors on the touch screen.
(3) Correct use and storage
Follow the correct operation method when using, avoid excessive force or improper touch. When storing, choose a dry, ventilated and cool place to avoid the touch screen from being squeezed or bumped.