LED displays face more challenges
As we can see, because LED display advertising has the characteristics of large brightness, strong penetration, bright colors and high contrast, it can achieve long-distance display under different meteorological conditions such as strong light on sunny days, rain and fog and haze pollution, LED full-color display has been widely used in outdoor display, is an excellent and stable outdoor display product, in many outdoor display scenes such as our common buildings, shopping mall exterior walls and roads and other digital advertising forms, are released by LED screens to display. However, in recent years, with the continuous development of indoor large-screen display demand, LED display manufacturers are no longer satisfied with the outdoor application of LED displays, and vigorously promote LED displays from outdoor to indoors.
Realistically speaking, in the process of LED display from outdoor to indoor, LED screen is a certain comparative advantage: that is, LED display due to the self-luminous properties, the screen itself has high brightness, strong contrast and other display characteristics, in the face of indoor display, can not be afraid of indoor strong light environment, in daily use, do not need to create a dark room environment to achieve good display.
In order to achieve the goal of LED display from outdoor to indoor, LED display manufacturers have also made a painstaking effort, in the form of products, from outdoor large-particle LED display, research and development and upgrade of indoor display of small pitch or even micro-pitch LED display products, small pitch / micro-pitch LED display in the display effect, the fineness of the picture to achieve leapfrog improvement, the overall resolution can reach high definition or ultra high definition, the graininess of pixels has been greatly improved.
Highlighting 1-2 core advantages, under the fierce marketing offensive of manufacturers, LED display has expanded the application scenarios of indoor display on the basis of outdoor display applications, and its market strategy is undoubtedly successful; However, from the perspective of customer use, indoor large-screen display, if the LED display solution is selected, may be crippled by the manufacturer's marketing.
If nothing else, the luminous efficiency of LED display is very low, some studies have shown that in the energy conversion process of LED screen, the light efficiency of LED is only 100lm/W, and its electro-optical conversion efficiency is only about 20~30%, that is, only about 20~30% of the input electrical energy is converted into light energy, and the remaining 70~80% of the energy is all consumed in the form of thermal radiation; In contrast, incandescent lamps commonly used in the past can convert almost all the electrical energy input into light energy to radiate. Therefore, the heating of LED displays is very serious, and the serious heating has always been the sword of Damolix hanging over the head of LED display manufacturers - it is difficult to resolve, and it is also an important information that LED display manufacturers will not tell customers.
As a small-pitch/micro-pitch LED large screen applied to indoor large-screen display, due to the higher density of LED diodes per unit area (more than 100,000 per square meter), when the screen works normally, its heat generation is an order of magnitude higher than that of outdoor LED display screen, and the heat is more serious, which is more likely to cause the screen and the surrounding air temperature to rise.
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How high is this temperature, according to industry news reports, the high temperature of the LED screen surface and its surrounding air, inhibiting the interactive upgrade of the LED screen, there have been large screen touch module suppliers, in order to expand the business scope on the LED screen surface experimental installation of interactive touch module testing, but unfortunately, when the LED screen long-term work caused its surface temperature to rise greatly (according to the measurement, the temperature can reach 70 °C, almost can fry eggs), The screen touch module has irreversible working failure under the high temperature of the screen surface, and then cannot be repaired, resulting in test failure.
The failure of the installation test of the interactive touch module reveals another major problem caused by the serious heating of the LED display - to the screen itself to bring additional secondary disasters, when the heating causes the screen and the surrounding air to be in a high temperature state for a long time, the actual usable life of the screen components will be much lower than the design service life, daily use, the LED screen failure rate will be very high, which in turn leads to frequent shutdown maintenance, and this is usually required for large-screen display usually 7*24 hours of continuous use needs will have a serious impact.
In addition to causing harm to the performance and service life of the LED screen itself, LED screen heating will undoubtedly bring an unfriendly experience to the user of the screen. LED screen that can not solve the heating problem for a long time, its heat dissipation will lead to an increase in the temperature of the entire environment (although there will be cooling and refrigeration equipment such as air conditioning, but the thermal radiation of the screen to the surrounding environment for long-term work will still make people uncomfortable), and the staff will work in such a stuffy environment for a long time, the efficiency will inevitably decrease, and the work mood will inevitably be slack.
Especially when the use of LED display is substituted into a typical conference display scenario, the impact of LED screen heating on actual use will be more intuitive. In the typical conference display scenario, due to different levels, the setting of office seats is often different, usually the leader who chairs the meeting and the work sits on the rostrum position about 1-2m close to the screen, while the general colleague's seat is relatively backward, when conducting a meeting of 1-2 hours or more, the leadership chair close to the severely heated screen will experience the feeling of being roasted, a meeting, even if it will not sweat like ants on a hot pot, it is difficult to maintain a good attitude under the long period of smoldering, Instead, ordinary colleagues sitting a little further away from the screen are less affected by the heating of the screen.
Based on the above, the LED display with serious shortcomings is difficult to get more praise from users, and such a result, will make people fall into an embarrassing situation, as the decision maker of the LED display program, the original starting point is to hope to improve production efficiency and improve the work experience through the transformation of productivity equipment, but the final result is not satisfactory.
Therefore, when faced with the selection of indoor large screen solutions, if as a project decision-maker in the LED display manufacturer's marketing offensive to choose the indoor LED display program, usually can be expected of the two outcomes are that some indoor display LED screens are idle after being used several times after completion, or broken jars broken and hard to continue to use, in the case of no choice, everyone has to sit far away from the screen 7~8m away to watch the screen, so as not to be roasted by the heat emitted by the screen.
Therefore, in summary, as an owner or decision-maker, when faced with the trade-off of indoor large-screen display solutions, the marketing of LED screen manufacturers must also keep their eyes awake, carefully compare the advantages and disadvantages, indoor large-screen display is not a simple consumable, as a display device that can be used for 3~5 years or even longer, it is necessary to make decisions that are more in line with realistic needs with a longer-term vision.