Prolonged heat can significantly shorten the useful life of many LED systems. All rights reserved. Generally, the time for the luminous flux of the Third, the temperature rise will reduce the luminous efficiency of the LED display. The light output of an LED for a constant current varies as a function of its junction temperature. This increase will typically be from 0.1nm/°C-0.2nm/°C depending on the type of LED used." So the right temperature is crucial for LED displays. 25 °C and light intensity effect was expressed by the Monod-type equation. As current increases in the LED, so does the velocity of the electrons passing through the semiconductor, thus increasing intensity. Junction temperature is a function of:
The luminous wavelength of a led display can be generally divided into a peak wavelength and a dominant wavelength. Since the LED display is an electronic product, an increase in temperature will affect the light decay of the LED display lamp beads, affect the operating efficiency of the drive IC, and the service life of the LED display.First, the operating temperature of the LED display exceeds the chip’s bearing temperature, which will quickly reduce the luminous efficiency of the LED display, produce obvious light decay and cause damage; LED displays are mostly packaged with transparent epoxy resin.
Obviously, the repair of the light emitting wavelength of the LED display caused by the junction temperature will directly cause the human eyes to have different feelings on the light emitting color of the LED display. The peak wavelength is the wavelength with the highest light intensity, and the dominant wavelength can be determined by the X and Y chromaticity coordinates, reflecting the color perceived by the human eye. Higher temperatures generally reduce light output. Phase transition temperature (usually 125 ° C), the packaging material will transition to a rubbery shape and the thermal expansion coefficient will rise sharply, which will cause the LED display to open and fail.Second, excessive temperature will affect the light attenuation of the LED display. Consequently, the above-mentioned two analyses with regression and mathematical modeling showed that the cell growth of C. littorale can discriminate between temperature and light intensity effects. For a LED display device, the forbidden band width of the light-emitting area material directly determines the wavelength or color of the device’s light. When operation temperature increases from 327 K to 380 K, the light efficiency of LED decreases 20%.
It is reported that LED display market share accounts for about 80% of the world’s, the market is very large, the world’s major LED display manufacturers are also concentrated in China, especially in the eastern coastal regions.In today’s increasingly wide application of LED display screens, in order to maximize the use of display screens, application companies should have the basic common sense of LED display screen maintenance. In general, the cooler the environment, the higher an LED's light output will be. Whether it is an indoor LED display or an In general, indoor LED displays generate less heat due to low brightness and can dissipate heat naturally; however, outdoor LED displays generate high heat due to high brightness and require heat dissipation through air conditioning or axial fans. Most LED manufacturers publish curves similar to those in Figure 9 for their products, and the precise relationships for various products will be different. The system manufacturer should then provide a range of permissible operating temperatures within which acceptable operation will be expected. As the temperature decreases, so does the LED wavelength, making the LED brighter. © 2023 by Lovely Little Things. In general, the cooler the environment, the higher an LED's light output will be. Higher temperatures generally reduce light output. The life of a led display is represented by its light decay, which means that as time goes on, the brightness becomes lower and lower until it finally goes out. Proudly created with After years of development, China’s LED display market has matured. It is important to note that many of these graphs show light output as a function of junction temperature and not ambient temperature. Fourth, the effect of temperature on the LED display wavelength (light color). As the temperature increases, the forbidden band width of the material will decrease, causing the device’s light emission wavelength to become longer and the color to shift red.V.