LED related applications and development

What are the hazards to the LED display caused by poor heat dissipation in the hot summer?
The biggest problem currently encountered by LEDs is heat dissipation, and the same is true for LED displays. The power consumption of the LED display is very large, and a considerable part of the energy is wasted on heat. Fever can cause many problems. Why LED display can be widely used, my summary is as follows:
1. Scalability: The larger the LCD screen, the higher the investment in production line equipment. The increase in the size of the LED display is very easy, just like building blocks. The resolution is also convenient to realize according to user needs.
2. Full color: light bulbs, neon lights, etc. are all monochromatic, and LED realizes the combination of RGB three primary colors.
3. High reliability: LED is solid-state lighting with high reliability, unlike neon tubes, bulbs and the like that require vacuum tubes.
4. Long life: The theoretical life of the LED chip can reach 100,000 hours, and the actual life is more than 30,000 hours.
5. Environmentally friendly: LED itself is an energy-saving and pollution-free product.
The biggest problem currently encountered by LEDs is heat dissipation, and the same is true for LED displays. The power consumption of the LED display is very large, and a considerable part of the energy is wasted on heat. Fever can cause the following problems:
1. Wavelength drift: Wavelength drift will cause problems in color correction. The wavelength drift of LED is relatively large at low temperature and high temperature. According to experimental data, for every degree of temperature change, the wavelength changes by 0.2-0.3nm.
2. Output brightness reduction: 1% of output brightness changes caused by temperature change per degree Celsius, among which the red light is the most affected. From -40 degrees 180% brightness, to 120 degrees brightness is less than 50%, that is to say, the brightness of the red light is reduced by nearly two-thirds. Relatively speaking, the brightness of blue light and green light has less temperature influence, especially blue light. When the temperature rises, a problem arises. The brightness of LEDs of different colors is not the same.
3. Temperature rise leads to shortened LED life: According to the data of a laboratory in the United States, the junction temperature increased from 63C to 74C, and the LED life decreased from 36,000 hours to 16,000 hours.
4. Too many heat-dissipating components lead to higher system costs.
5. Waste energy and increase user costs.
So where does the heat come from? From the power supply to the LED lamp, to the LED driver, and then to the adjustable resistor, the heating part includes the LED lamp, the LED driver, and the LED connection line. Let's take 5V power supply as an example:
Power supply voltage: 5V,;
LED: LED G/B Vfwd=3.2V, LED R Vfwd=2V
1. The luminous efficiency of LED is about 20%, and LED heating accounts for 50% of total heating
2, controllers and connecting wires account for about 5% of the total heat generation
3. Drive voltage drop: 1.8V(G/B) or 3V(R) voltage drop, the heating of the drive part accounts for more than 45% of the total heating.
The heating of the LED lamp needs to improve the luminous efficiency of the LED, the controller and the connecting wire have less heating, and there is not much room for improvement. There is a lot of room for improvement in the heat generation of the driving part, which is also the part we look forward to improving. Leading LED chip companies are stepping up production expansion, inventory rises and prices fall
How can the LED display save power?
LED display is an energy-saving and environmentally friendly product. The power per square meter is relatively low. The use rate of LED display in the market is getting higher and higher, and the area is getting bigger and bigger. The power consumption of LED display is also an issue that users are more and more concerned about. . How can the LED display save power?
As a new type of display technology, the display screen is known for its high brightness and high energy saving. It is displayed by small light-emitting diodes inside, so compared to other display products, it is more power-saving. But it's only relative. If your display is large and colorful, its power consumption per square meter is 300-600W. The power consumption of displays using different technologies varies greatly. Common displays include CRT, LCD, and LED displays. Of these three types of displays, CRT consumes the most power, LCD is the second, and LED is the least. Taking a common ordinary LED display (referring to a liquid crystal display with LED lighting as a backlight), the general power consumption is about 25W.
If it is a monochromatic LED display, the power consumption per square meter is about 150-200W per hour, which is also related to your display method.
The maximum power consumption of the outdoor LED display (full-color) is about 800W/square, which means that when the outdoor LED display reaches the maximum power (peak) every moment, the power consumption per square hour It will be 0.8 kilowatt-hours of electricity. The maximum power of each board of Shanhong is 25w, 16 boards are counted as one square, and the power consumption is 150-200 W.
LED display power consumption calculation: Generally, the maximum power consumption is calculated first by the number of points. As an important part of the power supply system for the LED display, choosing a qualified and reliable power supply can significantly improve the energy-saving effect and service life of the LED display.
If the area of the LED display screen is relatively large, it is easy to use energy-saving design.
There are two main methods for energy-saving LED display:
1. Installing the screen is to install a multi-function card with a light sensor, so that the LED display can automatically adjust the brightness of the screen according to the outdoor light intensity to achieve energy-saving effects.
2. Energy-saving IC and low-voltage power supply are used in the screen design. According to the formula P=UI, because the screen LED display is driven by a constant current, that is, the current is constant, the voltage drop is reduced, and the power is reduced.
It is very important to choose a good LED display manufacturer. It is even more important to choose a professional salesperson in charge. It can help produce professional LED display system solutions, realize the screen functions realized by the customer`s line drafts, and meet the requirements of customers. At the same time, we can consider the problem from the perspective of the customer.
Outdoor LED screen allows advertising brand promotion to meet a better vision
As an enduring outdoor advertising, its unique advantages and strong brand effect are worthy of investment by many businesses.
Since entering the information age, outdoor LED displays have been favored by bustling commercial streets. Suddenly, the outdoor led display seems to have also emerged as a subversion of the traditional image of the urban landscape. With the continuous development of the urban construction process, outdoor led display screens are being used more and more as a new advertising carrier for media.
Outdoor led display screens can indeed bring a certain improvement to the image of the city, and the forms of advertising have become flexible and diverse. Outdoor LED displays in world-renowned cities such as Times Square in New York, USA and Ginza in Tokyo, Japan can be called city symbols. It can be seen from this that the development speed and urban status of outdoor led displays can be seen.
The rapid development of outdoor advertising LED screens has become the "new favorite"
The development of outdoor advertising led large screens has been around for more than ten years. As the effect of commercial agglomeration has increased year by year, their mission to show the image of the city has become more and more important. Outdoor media advertising is not only a manifestation of urban economic and commercial prosperity, but also a microcosm of urban culture and quality. They carry the brand's logo, name, culture and the organic combination of the brand, and have a decisive influence on the communication and shaping of the brand image. There is no doubt that the outdoor advertising led large screen has appropriately become the darling of the new media communication industry.
The outdoor LED advertising screen outlines the urban art. They serve as interpreters of the character of the city, region, and business type, for people to experience and perceive, and become city landmarks for people to find the starting point of departure and the end of return journey. In addition, according to relevant agency data, the average weekly arrival rate of outdoor LED display media is 61.8%, the average weekly arrival frequency in business districts is 3.8, and the monthly average arrival rate is 79.3%. 30% of the audience actively pay attention to outdoor LED displays. In the media, the average single gaze of the audience is 15.1 seconds. It is not difficult to see from the above that outdoor LED advertising is closely linked to all areas of our lives, and plays a decisive role in the formation of a good brand image and attracting consumers to participate in the process of brand communication.
Outdoor LED screen allows brand promotion to meet a better world
Compared with other carriers, outdoor led display screens have outstanding features and advantages. Social progress and technological development provide a good opportunity for the development of led display screens. The led display can really shorten the distance with the audience, make the communication more specific and the marketing more close to the people. LED display can gain a foothold in outdoor advertising media, and its biggest advantage lies in value realization.
With its own high-definition seamless splicing, the led display screen instantly kills traditional communication channels with its beautiful and natural picture. Large-sized, dynamic, and animated advertisements can promote the sensory experience of the audience in an all-round way, and effectively convey information to guide consumption. In this marketing era where the people who win the hearts of the people win the world, large led screens can profoundly affect the audience's cognition and consumption philosophy.
led display
With its own high-definition seamless splicing, the advantages of beautiful and natural pictures instantly kill traditional communication channels. Large-sized, dynamic, and animated advertisements can promote the sensory experience of the audience in an all-round way, and effectively convey information to guide consumption. In this marketing era where people who win the hearts of the people win the world,
led big screen
Can profoundly affect the audience's cognition and consumption philosophy.
In the Internet era, large led screens can be more organically integrated with the Internet for real-time broadcast and timely dissemination. Effectively meet the timeliness and dissemination needs of outdoor media.
The application of intelligent mode in the field of outdoor LED advertising screens is also the general trend in the future. The change from quantitative change to qualitative change will not only bring huge development opportunities for the emerging manufacturing industry, including the LED industry, but also indicate the future direction of industrial development. Therefore, in the future, outdoor LED advertising screens will inevitably move forward in a broader and more high-end direction.
The development road of LED display
As my country`s LED display technology advances by leaps and bounds, and domestic LED companies have emerged, the LED display market is in a "saturated" state. It may be difficult for the market to have explosive growth in the future. LED display companies must rely on their own development technology. Competing for market share, China's LED display industry will face a "big reshuffle." Under this general background, there are two more obvious development characteristics.
One, fine points
In recent years, a market segment of the LED display industry has gradually formed. There have been some small and medium-sized display companies that have outstanding performance in a small area of LED display. Not only that, several leading LED display companies have used their subsidiaries to develop LED displays. The layout of the category market is becoming clearer. They have accumulated a relatively solid brand foundation in their main subdivisions. These all indicate that the LED screen industry is forming a situation of finely divided display types, and the growth of large brands is very strong and strategic.
Therefore, if the next successful small and medium-sized enterprise want to do, it must quickly strive for a favorable brand positioning in the sub-category, and achieve the ultimate in that sub-product, otherwise there will be a scene of competition with the field that the opponent is familiar with. .
Two, upgrade
Although companies that have been subdivided into product categories have developed strongly, the challengers are the most indispensable in China. Because products of the same type are undergoing diversified development in both hardware facilities and solutions. Especially in the field of small-pitch LED displays.
The innovation and upgrading of products, the extreme division of categories, and the competition of brand reputation have formed an unstoppable situation.
The continuous upgrading of products indicates that the low-end equipment in many industries will not be able to meet the production needs of the current products. Even if some manufacturers have now replaced their production equipment, they will still face pressure on production capacity, whether there is enough production capacity to support the reduction cost. The differentiated market is further segmented, and fierce competition has increased the speed of product upgrades, and it has also prompted companies to rack their brains to make the ultimate product and application segmentation. This will become a major development trend of the next industry.
From the perspective of the current industrial structure, my country`s LED display screens have gradually changed in recent years. Specialized division of labor in the industry is taking shape: manufacturers focusing on display production, market channel sellers, engineering installation after-sales service operators, etc. With the emergence of specialized enterprises, a situation of clear division of labor, close cooperation, and win-win development is taking shape. Specialized division of labor is conducive to becoming more refined, larger, and stronger, and has a positive significance in promoting the healthy development of the entire industry. At the same time, in this process, with the continuous optimization and development of the industry, terminal products will be more diversified and refined, and the market will also pass rounds of competition and elimination, and finally form several leading screen companies and many " "High-precision and specialized" enterprises dominate the overall situation, and the pattern of a group of small and medium-sized enterprises competing for the remaining market will be a big leap forward for the entire LED display industry.