Advertising signs are widely used in all walks of life, including large outdoor billboards, door advertising signs (shop signs), anti-aircraft guns, ink-jet advertisements and so on.

There are many kinds of advertising signs, which are basically classified into three categories:

1. Plane signs-including painting, engraving, hand painting, etc.

2. Three-dimensional signs-including sculpture, metal characters, plastic absorption, etc.

3. Lighting signs-including light boxes, neon lights, LEDs, etc.

Ink-jet signboards are very common, which are the earliest and most widely used signboards. Many large signboards are made of ink-jet signboards, because they are not only low in price, but also good in advertising effect.

led signboard is the fastest-growing signboard type in recent years. Stores and large-scale outdoor building billboards have begun to use led signboard, especially in large and medium-sized cities, with the coverage rate reaching 81% of the types of signboard production. led signboard has outstanding advantages, such as energy saving, environmental protection, durability, good advertising effect, windproof, waterproof and safety. Led luminous characters include: stainless steel luminous characters, resin luminous characters, acrylic luminous characters, plastic luminous characters, light box luminous characters, etc. Recently, a new method of signboard, led colorful screen signboard, has become popular. With the improvement of people's living standards, the aesthetic requirements have also been continuously improved, and the development trend of led colorful screen advertising signboard has become inevitable.

five years ago, neon signs enriched every street and alley, and it is undoubtedly a symbol of prosperity and wealth. However, with the appearance and application of led light sources, neon signs have no advantage over led luminous signs, so neon signs have gradually retired, and the neon era has begun to become history.