Patent Application
20090145010
The present invention relates to a billboard and particularly to a thin billboard that can emit light evenly and save energy.
Billboards are important commercial media to promote business brands and products. Referring to
In the conventional luminous billboard the chest 1 has to be made at a selected thickness to hold the fluorescent lamp 2. Hence it takes a lot of space and often is quite heavy. Light generated by the fluorescent lamp 2 in the chest 1 often is not evenly projected. Local luminosity difference occurs. People's visual feeling could be disturbed and deciphering could suffer. It makes advertising less effective. To make the luminosity of the chest 1 more uniform, more florescent lamp 2 is required. This results in more electric power consumption and higher user's operation cost.
Therefore the primary object of the present invention is to provide a thin, energy-saving and even luminous billboard to reduce user's operation cost and improve advertising effect.
The present invention provides an inner scattering billboard which includes a light directing body, an advertising membrane and a light source. The light directing body has at least one incident surface and at least one emitting surface. The light directing body contains a plurality of light directing particles that are scattered inside. The light source is located close to the incident surface to emit light to enter the light directing body. The advertising membrane is bonded closely to the emitting surface and has an advertising symbol located on an outer side thereof.
By means of the aforesaid structure the light directing body provides an even planar light source. Coupled with the advertising symbol on the advertising membrane a luminous billboard is formed. Compared with the conventional billboard, the invention provides more benefits such as even luminosity, thin and light, and energy saving. It also can reduce user's operation cost and improve advertising effect.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
Please referring to
The light rays 31 emitted from the light source 30 pass over the light directing particles 11 once or a number of times and are diffused so that the light directing body 10 becomes a planar light source with even luminosity. The advertising membrane 20 is bonded closely to the emitting surface 102. As the embodiments depicted in the drawings shown, two advertising membranes 20 are provided to be bonded to two emitting surfaces 102 on the upper side and lower side. The outer surface of the advertising membranes 20 has an advertising symbol 21 printed or bonded thereon to represent an intended brand or notation. The advertising membranes 20 may be bonded to the surface of the light directing body 10 a number of times repeatedly. Thus the advertising symbol 21 may be replaced according to user's requirements.
By means of the construction set forth above, when the light rays 31 enter the light directing body 10, the diffuse effect of the light directing particles 11 makes the light directing body 10 to become a planar light source of even luminosity. Thus deciphering of advertisement can be enhanced, and the billboard can be formed thinner and lighter. When LED is adopted as the light source 30, it also can save energy consumption to reduce user's operation cost.
