Abstract: A display disinfection device includes a display, a disinfection module and a detection control module. The disinfection module is provided on the display for disinfecting a screen of the display. The detection control module is provided on the display and includes a controller, a first detector and a second detector. The first and second detector are electrically connected to the controller, such that the first detector and the second detector can respectively transmit a detection message to the controller after detecting a use state of the display, allowing the controller to determine according to the detection message to activate or to deactivate the disinfection module. In brief, the detection control module can activate the disinfection module to disinfect the display according to the use state of the display and to deactivate the disinfection module after a predetermined time period, allowing the display to be easily disinfected in real time.

Abstract: An advertising display device includes a base body, a light-guiding unit, a light-emitting unit and an audio and video output unit. Therefore, the audio and video output unit plays the advertising film, and the light-emitting unit carries out the demonstration of the light source in conjunction with the light-guiding unit at the time of playing the advertising film to increase visual effects and attract the attention of consumers for achieving a better advertising effectiveness.

Abstract: A lens-cleaning device for cleaning dust deposited on a plurality of lenses, includes a tray, a front cover, and a plurality of air nozzles. The tray defines a plurality of grooves and a plurality of through holes alternately arranged in a first surface of the tray. Each of the lenses is received in one groove. The front cover defines a plurality of assembling holes in a second surface of the front cover corresponding to the through holes. The front cover covers the tray with each of the air nozzles received in one assembling hole, and the air nozzles are capable of blowing air against the lenses causing the dust deposited on the outer surface of the lenses to be blown away through the through holes.

Abstract: A lens-cleaning device for cleaning dust deposited on a plurality of lenses, includes a tray, a front cover, and a plurality of air nozzles. The tray defines a plurality of grooves and a plurality of through holes alternately arranged in a first surface of the tray. Each of the lenses is received in one groove. The front cover defines a plurality of assembling holes in a second surface of the front cover corresponding to the through holes. The front cover covers the tray with each of the air nozzles received in one assembling hole, and the air nozzles are capable of blowing air against the lenses causing the dust deposited on the outer surface of the lenses to be blown away through the through holes.