Feedback from many a user: the LCD equipment is installed and the supplies are constantly fine, but in less than half a year, there is the output of various problems. After all, this is still a problem of thermal design and dust prevention. Due to the present market order, the digital outdoor signage industry is not large enough, with fierce competition, many manufacturers are not rigorous or intentionally exaggerated in the product specifications: such as, the maximum brightness of LCM is 2000nits for air-cooled and heat-dissipated outdoor LCD signage, the working temperature is -40~60 °C or more, the backlight light decay ≥ 50000h, the protection level reaches IP65, the working noise is less than 60dB…
Outdoor LCD signage, that is, the industry referred to as outdoor LCD advertising machine, is a subdivision of the commercial display industry. Since the product is installed for outdoor use, highlighting, protection, thermal design and reliability are the focus of the whole machine design. The earliest use of cabinet air conditioning for heat dissipation did solve the problem of heat dissipation, but due to factors such as product thickness, reliability, cost and power consumption, the industry continues to study new heat dissipation schemes to replace, air-cooled heat dissipation, heat exchange dissipation came into being.
TALKING ABOUT THE OUTDOOR LCD SIGNAGE USING AIR COOLING HEAT DISSIPATION, SUNTUNE FIRST USED THE AIR COOLING SOLUTION FOR THE WHOLE MACHINE HEAT DISSIPATION DESIGN IN 2012. From the earliest use of centrifugal fan design outdoor vertical landing 70-inch LCD machine heat dissipation, to the current outdoor 110-inch LCD machine using air-cooled heat dissipation, from single-screen heat dissipation to multi-screen splicing machine heat dissipation, from the earliest zero design experience to today’s professional whole machine system air-cooled heat dissipation a variety of schemes, multiple patents, familiar with various fan performance and selection, dust filtration, etc., these achievements are inseparable from the long-term learning and research of the R & D team, and always require high reliability and fast maintenance of products.
Installing LCD signage equipment for outdoor use, removing the structure and electronic control part, the biggest focus and difficulty is heat dissipation and dust prevention. If the thermal design is not done well, the common problems of outdoor LCD signage are: black screen in the sun, diaphragm wrinkle in high-brightness LCM, burst screen, mura, OC short-term yellowing, lines, burning T-con or backlight plate, fast light decay, high failure rate and so on. If the dust prevention is not done well, the outdoor cabinet will come in with a lot of dust. Dust into the front glass and LCM surface, it will affect the screen display effect, meanwhile increase the electronic components of a very high failure rate. Some boards are burned upon conduction because of the dust accumulation. Therefore, the key and difficult point for outdoor LCD signage is heat dissipation and dust prevention. However, many manufacturers fail to pay attention or don’t have the strength to solve the important factors which result in low product reliability and high failure rate.
In addition to rich thermal design theory and thermal simulation capabilities, professional designers must have comprehensive knowledge of structure, electronics, etc., and at the same time be familiar with the characteristics of various components of heat dissipation products and product temperature rise testing capabilities, only then can he formulate a perfect heat dissipation scheme for the whole machine. At present, because the outdoor LCD signage industry is a subdivision industry, large companies have not entered the industry, and the progress of technology needs to be expanded by talents of various companies, SUNTUNE looks forward to everyone’s efforts.
