In industrial environments or daily life, touch screen devices may be subjected to accidents such as drops and collisions, so drop protection is particularly important. Good drop protection protects the touchscreen from damage, extends the life of the device, and reduces the cost of repair and replacement. In order to ensure that the touch screen can maintain normal operation under various drops and impacts, manufacturers need to conduct a series of drop resistance tests before shipment.
How to test the drop-proof performance of touch screen
1. Test Criteria
Test standards for touch screen drop resistance usually include international standards and industry standards. International standards, such as ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission), provide the basic framework and guidance for touch-screen drop resistance testing. Industry standards, on the other hand, set more specific testing requirements and evaluation criteria based on different application scenarios and device types. For example, the drop test standard for cell phone touch screens may include simulated drops, shocks, vibrations and other scenarios to ensure that the touch screen can maintain normal operation in a variety of real-world environments.
2. Test Equipment
The test of touch-screen drop resistance requires the use of professional test equipment to ensure the accuracy and reliability of the test results. Common test equipment includes drop tester, impact tester, vibration tester and so on. Drop testers can usually simulate the fall of a touch panel from different heights and angles to evaluate its drop resistance. Impact testers test the impact resistance of touch panels by applying a certain impact force. The vibration tester is used to simulate the vibration environment that the touch screen may encounter during transportation and use.
3. The test procedure of touch screen drop resistance usually includes the following aspects:
Preparation stage: First, test samples and test equipment need to be prepared. The test sample should be consistent with the actual use of the touch screen, including size, material, structure, etc.. The test equipment, on the other hand, should be selected and calibrated according to the test standards and test requirements.
Pre-testing: Before formal testing, pre-testing is usually conducted to ensure the accuracy of the test equipment and test methods. Pre-testing may include equipment calibration, sample inspection, etc.
Drop test: Drop test is the most common test for touch panel drop resistance. During the test, the touch screen sample is fixed on the drop test machine and then dropped from a preset height and angle. The drop test can simulate various drop situations that the touch screen may encounter during use, such as dropping from a desktop, slipping from a pocket, etc.
Impact Test: The impact test is used to evaluate the impact resistance of the touch screen when it is impacted by external forces. During the test, an impact tester can be used to apply a certain impact force to the touch screen to simulate the situation when the touch screen is collided or squeezed.
Vibration Test: The vibration test is used to evaluate the stability and reliability of the touch panel in a vibration environment. During the test, the touch panel sample is fixed on the vibration test machine, and then different frequencies and amplitudes of vibration are applied to simulate the vibration environment that the touch panel may encounter during transportation and use.
Functionality Test: After the above tests are completed, a functionality test needs to be performed on the touch screen sample to assess whether it still maintains normal operation. The content of the functional test may include touch response, display effect, key function, and so on.
4. The evaluation criteria for the drop-proof performance of the touch screen usually include the following aspects:
Appearance damage: Evaluate whether the touch screen has obvious appearance damage after the test, such as cracks, dents, deformation and so on. These damages may affect the aesthetics and service life of the touch screen.
Normal Function: Assess whether the touch screen still works normally after the test. Functionality tests may include touch response, display effect, key functions, etc. If the touch screen has abnormal function after the test, such as no touch response, abnormal display, etc., it indicates that its anti-drop performance does not meet the requirements.
Stable performance: Evaluate whether the touch screen still maintains stable performance after testing. This includes the sensitivity, response speed, positioning accuracy, etc. of the touch screen. If the performance of the touch screen after the test appears to decline or unstable, it indicates that there are problems with its anti-drop performance.
Durability: Evaluate the durability of the touch screen over a long period of time and in a variety of environments. This includes the lifespan, fatigue resistance, and aging resistance of the touch screen. If the touch screen shows low durability after the test, it indicates that its anti-drop performance may not be sufficient to meet the actual use requirements.
After the above tests, evaluate the anti-drop performance of the touch screen according to the evaluation criteria. If the touch screen does not have obvious appearance damage, normal function, stable performance and good durability after the test, it indicates that its anti-drop performance meets the requirements. Otherwise, the touch screen needs to be improved or redesigned to improve its drop resistance.
5. The realization of anti-drop performance:
Reinforced shell: using strong shell materials, such as metal or high-strength plastic, can effectively protect the touch screen from external impact.
Impact-resistant materials: Using impact-resistant materials inside the touch screen can further absorb the impact of the drop.
Strengthened display glass: The use of strengthened glass or special coatings, such as Corning Gorilla Glass, can improve the hardness and impact resistance of the screen.
The drop-proof performance test of the touch screen is an important part to ensure that it maintains normal operation in the actual use environment. By setting appropriate test standards, using professional test equipment, and following strict test procedures and evaluation criteria, the drop resistance of touch panels can be effectively evaluated. This not only helps manufacturers to improve product quality and user experience, but also helps to promote the continuous development and progress of touch screen technology.