In daily life and production, LED lanterns have been widely used due to their low energy consumption, rich lighting colors, and low cost. Most of the full hardware LED lantern controllers currently on the market are not adjustable in frequency. This results in a single flashing pattern and poor selectivity. The application of LEDs in subway advertisements needs to further enhance the dynamic effect, improve the control performance of the lanterns, the production is simple, and the operation is convenient. The subway image advertising device is characterized in that it is mainly controlled by a central controller, an adjustable timer, a gear display design, an infrared vehicle speed detector, an advertising window, a high-brightness light-emitting diode array, a lantern electrical design, and a flashing frequency control of the advertising window. When working, use the top advertising window positioning holes and the bottom advertising window positioning holes to fix the windows at equal intervals on the side wall of the subway tunnel, and paste continuous frames of advertising pictures on the transparent glass screen in order, the center The controller detects the speed of the subway in real time, and controls the flashing frequency of the advertisement window. Compared with ordinary billboards, this advertising device has the characteristics of easy replacement and energy saving.
Market demand
my country's LED display industry started in the early 1990s and has always maintained rapid development.
According to the statistics and calculations of the LED Display Application Branch of the China Optics and Optoelectronics Industry Association, as well as the data provided by relevant domestic institutions, as of November 2013, there were 204 member units joining the LED Display Application Branch of the China Optical Association, and the country has a relatively formal professionalism. 300 to 400 production units. There are more than 1,000 manufacturers engaged in LED display application products. It is estimated that there are no less than 3,000 companies engaged in LED display application products including sales, production, and supporting services.
In the past few years, the LED display industry has been in a good development opportunity. In general, there has been a relatively significant growth compared with the previous years. The overall scale of the industry is the largest growth rate in recent years. Nationally, there are very few instances of advertising media being placed in subway tunnels, and almost zero in Shanghai. As an emerging industry, advertising media has broad development prospects for its application in subway tunnels, under the background of the great development of urban rail transit. In the urban rail transit industry in northern China represented by the Beijing Metro, it has been applied to practice, but there is no precedent in the urban rail transit in southern China represented by the Shanghai Metro. Therefore, this new type of LED flash device has a huge space in the subway advertising market.
