The access control and touch all-in-one technology is actually formed through the integration of access control and access control identification equipment. It is an embedded integrated device. From the perspective of the development of electronic equipment, it is usually decentralized to integrated, from integrated to functional diversification. As far as integrated devices are concerned, the initial integration is often achieved at the expense of certain functions, and in the mid-term functions are often the most important factors restricting the further development of the device. The technology of the access control integrated machine is mainly divided into three parts: one is the management software, the other is the main control module, and the third is the authentication and identification module. Management software, of course, requires simple and practical operation, and does not require too complicated project management. It is simple to manage one or two functions. The mai

The touch all-in-one is a touch product that bundles the touch screen and related software together with external packaging for query purposes. The touch all-in-one machine has truly integrated the function of touch and control, greatly improving people's work efficiency. As an input device, the touch all-in-one has many advantages such as ruggedness, fast response, space saving, and easy communication. As long as the user touches the screen of the machine lightly with a finger, the user can quickly get the information he wants, thereby making the human-computer interaction more straightforward. As a high-tech machine, the touch all-in-one has gradually replaced the status of a simple touch screen, so that users can truly feel the characteristics of human-computer interaction. The evaluation of professional parameters of a touch all-in-one machine mainly includes the following aspects: 1. Contrast: Contrast is actually the ratio of the maximum brightness value divided