The IEC 6 2679-4-2 standard specifies the environment test method for electronic paper display (EPD) panels and modules under the assumed use environment, aiming to evaluate their environment Reliability. The test content includes the effect of temperature, Humidity, light, mechanical Impact, vibration, salt fog corrosion and other conditions on the display performance. The standard applies to monochrome or color segmented, passive or active matrix electronic paper display modules, especially EPDs operating in reflection mode. Through these tests, manufacturers can optimize the product design and ensure that the electronic paper display maintains good display performance and Stability under different environment conditions.