Abstract: A waterproof heat dissipating structure is provided on an electronic signboard having a main body with a first surface as a display and an opposite second surface, and includes at least one through hole provided on the second surface of the main body of the signboard, and at least one waterproof breathable unit provided at each through hole as a protective layer. The waterproof breathable unit has an area not smaller than that of the through hole, and has the property of allowing gas but not liquid to pass therethrough. Therefore, air inside the main body heated by the heat produced by the display at the first surface of the signboard may pass through the waterproof breathable unit at the through hole to carry away heat from the main body to achieve the purpose of heat dissipation and maintain the main body at a pressure balancing state.

Abstract: A signboard structure includes a case and a face panel detachably connected to a front opening of the case by means of magnetic adherence. The case includes a back panel on which a plurality of light emitting elements are arranged to partially expose from through holes correspondingly provided on the face panel. A watertight and dustproof sealing material is applied into the case to seal joints of the light emitting elements and the back panel to protect the light emitting elements against moistures and dust. Magnetic elements are correspondingly provided on a front side of the back panel and a rear side of the face panel at predetermined positions, so that the face panel can be quickly and detachably assembled to the case to show different static pictures and/or texts painted on the face panel.

Abstract: A signboard structure includes a case and a face panel detachably connected to a front opening of the case by means of magnetic adherence. The case includes a back panel on which a plurality of light emitting elements are arranged to partially expose from through holes correspondingly provided on the face panel. A watertight and dustproof sealing material is applied into the case to seal joints of the light emitting elements and the back panel to protect the light emitting elements against moistures and dust. Magnetic elements are correspondingly provided on a front side of the back panel and a rear side of the face panel at predetermined positions, so that the face panel can be quickly and detachably assembled to the case to show different static pictures and/or texts painted on the face panel.