The future development of LED display in the advertising industry
The large outdoor full-color LED display has become a new force in the media. The full-color LED large-screen screen has always been an important part of the development of the LED field. It is an important part of the display of large-scale entertainment, sports events and squares. With the application of new technologies, New forms of outdoor advertising continue to emerge, and outdoor advertising full-color LED display media has emerged from time to time. Outdoor advertising is the oldest form of media in all advertising media. It is born at the same time as trade and is rooted in the city. It is closely related to the economic, cultural and social life of urban people. It is the medium of communication for brands and products. It is also a shining symbol of the city's prosperity and development. These characteristics form a unique and irreplaceable value for outdoor media.
At present, the world's demand for energy-saving, lightweight, miniaturized, high-reliability products is extremely urgent, and the LED display fully meets these conditions. LEDs are all-solid cold light sources that are smaller, lighter, and more rugged. They operate at only two volts and last for more than a decade. According to the usual definition of light efficiency, the luminous efficiency of LEDs is not high, but since the spectrum of LEDs is almost entirely concentrated in the visible light band, the efficiency can reach 80-90. LED display devices have been around for more than 20 years, and it is difficult to popularize in the first 10 years due to the adoption of raw materials and technical limitations. After entering the 1990s, with the continuous improvement of the process and the development of raw materials, LED display devices have developed rapidly in terms of life and brightness, and the cost has been greatly reduced.
The full-color LED display is not just an extension of pure outdoor media and TV media. It has a larger creative space and a three-dimensional space that interacts and communicates with consumers' time and space. It can meet the individual needs and has the concept of communication in the digital age. It is a unique form of screen. LED display is an inevitable direction for the future development of lighting, advertising and other industries.
Sheet metal forming processes are those in which force is applied to a piece of sheet metal to modify its geometry rather than remove any material. The applied force stresses the metal beyond its yield strength, causing the material to plastically deform, but not to fail. By doing so, the sheet can be bent or stretched into a variety of complex shapes. Sheet metal forming processes include the following:
l Bending
l Roll forming
l Deep Drawing
l Stretch forming
Bending
Bending is a metal forming process in which a force is applied to a piece of sheet metal, causing it to bend at an angle and form the desired shape. A bending operation causes deformation along one axis, but a sequence of several different operations can be performed to create a complex part. Bent parts can be quite small, such as a bracket, such as a large enclosure or chassis.
V bending and Wipe bending
Roll forming
Roll forming, is a metal forming process in which sheet metal is progressively shaped through a series of bending operations. The process is performed on a roll forming line. Each station has a roller, referred to as a roller die, positioned on both sides of the sheet. The shape and size of the roller die may be unique to that station, or several identical roller dies may be used in different positions. The roller dies may be above and below the sheet, along the sides, at an angle, etc. the roller dies are lubricated to reduce friction between the die and the sheet, thus reducing the tool wear. Also, lubricant can allow for a higher production rate, which will also depend on the material thickness, number of roll stations, and radius of each bend. The roll forming line can also include other Sheet Metal Fabrication operations before or after the roll forming, such as punching or shearing.
Deep drawing
Deep drawing is a metal forming process in which sheet metal is stretched into the desired part shape. A tool pushes downward on the sheet metal, forcing it into a die cavity in the shape of the desired part. The tensile forces applied to the sheet cause it to plastically deform into a cup-shaped part. Deep drawn parts are characterized by a depth equal to more than half of the diameter of the part. These parts can have a variety of cross sections with straight, tapered, or even curved walls, but cylindrical or rectangular parts are most common. Deep drawing is most effective with ductile metals, such as aluminum, brass, copper, and mild steel. Examples of parts formed with deep drawing include automotive bodies and fuel tanks, cans, cups, kitchen sinks, and pots and pans
Stretch Forming
Stretch forming is a metal forming process in which a piece of sheet metal is stretched and bent simultaneously over a die in order to form large contoured parts. Stretch forming is performed on a stretch press, in which a piece of sheet metal is securely gripped along its edges by gripping jaws. The gripping jaws are each attached to a carriage that is pulled by pneumatic or hydraulic force to stretch the sheet. The tooling used in this process is a stretch form block, called a form die, which is a solid contoured piece against which the sheet metal will be pressed. The most common stretch presses are oriented vertically, in which the form die rests on a press table that can be raised into the sheet by a hydraulic ram. As the form die is driven into the sheet, which is gripped tightly at its edges, the tensile forces increase and the sheet plastically deforms into a new shape. Horizontal stretch presses mount the form die sideways on a stationary press table, while the gripping jaws pull the sheet horizontally around the form die
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