国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

The Chinese reading acuity test instrument is a visual function inspector tool specially designed and developed for the Chinese readers. However, when using the previous version of test instrument, it fails to adjust the luminance of the screen adaptively or automatically keep the height of the screen always be equal to the patients’ sight level, and the function of corresponding Mini Program is relatively limited. In response to the above problems, a new version of Chinese reading acuity test instrument and its corresponding APP was designed and developed by customized segment LCD display, Bluetooth 4.2 solution, STM8 main-control module, and the Android Studio program development platform. The new version of the test instrument is equipped with the new functions of adjusting the position of screen by controlling screw slide table and the luminance of the screen automatically through the APP connecting with the Bluetooth. These new outbreaks improve the design of software and hardware of the test instrument. The experimental results show that the instrument has good adaptability and meets the needs of providing technical support for the diagnosis and rehabilitation of patients with low vision in different ages.