Abstract: The present application provides an anti-tamper circuit, an LED cabinet and an LED display screen, wherein the anti-tamper circuit is applied to an LED display system that includes an LED display screen and a digital cinema playback server connected to the LED display screen. The LED display screen includes a plurality of LED modules. The anti-tamper circuit includes a first signal transmission unit, a second signal transmission unit, a first field-effect transistor, a second field-effect transistor, a charging and discharging unit and a connection port for connecting the digital cinema playback server. In the present application, during power-off, both the anti-tamper circuit and the digital cinema playback server can be ensured to work normally; thus, digital copyrights are not subject to security threats, and the security of information is greatly improved.

Abstract: Disclosed in the present application are an LED display screen and a data display control method therefor, and a screen system. The display screen includes a plurality of LED boxes, and each of the LED boxes includes a plurality of LED modules capable of emitting triggering signals. The data display control method for display screen includes: acquiring the triggering signals emitted by the LED modules of any LED box; determining whether the triggering signals of the LED modules of any LED box body are tampering signals; and controlling the LED boxes to stop displaying data when all of the triggering signals emitted by the LED modules of any LED box body are tampering signals. By means of the technical solution of the present application, it is possible to detect whether the LED modules work normally, thereby improving the accuracy and security of data display performed by the LED modules.

Abstract: A mask (3), an LED module and a display screen, wherein the mask (3) is integrally in a grid structure and includes a plurality of grid units (31), each grid unit (31) is enclosed by a retaining wall (311), one end of the retaining wall (311) extends outwards the direction close to the center of the grid unit (31) and is provided with a support edge (312), and the outer side of the support edge (312) is provided with a support plane.

Abstract: A lens structure including a quarter wave plate layer and a linear polarizing plate layer is provided. When the linear polarizing plate layer is located at an outer side of the lens away from a viewer's eye, the polarizing axis of the linear polarizing plate layer is in a vertical direction. The lens structure can be used to make dual-purpose eyeglasses with sunglasses and 3D glasses functions. Any one of the quarter wave plate layer and the linear polarizing plate layer can be disposed at the outer side away from the user's eyes by adjusting the orientation of the lens of the present invention. When the linear polarizing plate layer is located at the outer side away from the user's eyes, the optical axis of the linear polarizing plate layer is in the vertical direction. Thus, the dual-purpose eyeglasses with both sunglasses and 3D glasses functions can be achieved.

Abstract: A lens structure including a quarter wave plate layer and a linear polarizing plate layer is provided. When the linear polarizing plate layer is located at an outer side of the lens away from a viewer's eye, the polarizing axis of the linear polarizing plate layer is in a vertical direction. The lens structure can be used to make dual-purpose eyeglasses with sunglasses and 3D glasses functions. Any one of the quarter wave plate layer and the linear polarizing plate layer can be disposed at the outer side away from the user's eyes by adjusting the orientation of the lens of the present invention. When the linear polarizing plate layer is located at the outer side away from the user's eyes, the optical axis of the linear polarizing plate layer is in the vertical direction. Thus, the dual-purpose eyeglasses with both sunglasses and 3D glasses functions can be achieved.