Complete quality control and sophisticated test procedures are often the key to the reliability and longevity of touchscreen products. Many manufacturers already offer technically and economically viable test procedures in this area. This article provides an overview of the common standards for quality control of touch screens.
Different test procedures guarantee durability
In order to guarantee the durability of ultra-resistive GFG touchscreens or multi-touch PCAP touchscreens in different areas of application, different test procedures are used. The following five test procedures are particularly popular.
Climate change test
The climate change test is suitable if you want to test the functionality of touchscreens under extreme climatic conditions. Certain products work smoothly in temperature ranges from -25 °C up to 70 ° C (e.g. PCAP touch screens), others can also cope well with temperatures as low as -40 ° (e.g. GFG ULTRA touch screens).
HALT Tests
The Highly Accelerated Life Test, also known as HALT, simulates normal, application-related aging and wear and tear of a touchscreen in a rapid process. Within a period of two to five days, an artificial aging process is created, which makes it possible to detect any product weaknesses.
Shock and vibration tests
In this test, the manufacturer examines how well the touchscreen performs under stresses caused by oscillations, vibrations and sudden shocks. Typical situations such as those that can occur when used in agricultural machinery, industrial production facilities, explosion-proof areas or aerospace. For example, when starting and stopping machines, shocks during a landing in airplanes or in the harsh environment of industrial applications.
EMC tests
Tests for the electromagnetic compatibility of touchscreen products are particularly important in the field of military and medical technology. Since interference radiation from surrounding electronics would have particularly dangerous effects here. There are various test methods in this area (e.g. galvanically coupled tests, capacitive coupled tests, inductively coupled tests and radiation-coupled tests). The aim of the EMC tests is to analyze the functionality and to optimize it in the event of malfunction.
Ball drop tests
The last test we presented is the ball drop test. It is particularly interesting for companies in the industrial environment, because it shows how robust certain touchscreens are in working environments with a harsh environment. In such tests, the robustness of touchscreen surfaces is checked by dropping a 2" thick and 0.509 kg steel ball from different heights. We are happy to provide you with a detailed test report on a ball drop test on a 15" ULTRA GFG touchscreen on our website.
Result
The various test procedures are suitable for checking the functionality of a touchscreen under different conditions and assessing how they affect its performance or even lead to a failure. If you would like to know more details about the different test procedures, you can find detailed information on our website under Test procedures.
