Five major factors determine the quality of LED display screen

　　1. The brightness and perspective of the LED display

　　The brightness of the display depends mainly on the LED luminous intensity and the density of LED

　　The display angle of the display should solve the problem of waste of light flux

　　The brightness of the display depends mainly on the luminous strength and LED density of the LED. In recent years, new technologies in LEDs in substrate, extension, chips and packaging have emerged endlessly, especially the stability and maturity of the technology and process of oxidation tin (ITO) current expansion layers, which greatly improves the luminous intensity of LEDs. At present, in the case of a high -power LED internationally first -class brands from a horizontal perspective of 110 degrees and a vertical perspective of 50 degrees, the luminous strength of the green tube has reached 4000mcd, the red tube reaches 1500mcd, and the blue tube reaches 1000mcd. When the pixel spacing is 20mm, the brightness of the display can reach more than 10,000nit. The display can work all day in any environment.

　　When it comes to the angle of the display screen, there is a phenomenon worthy of our thinking: LED display, especially outdoor display, people's observation angle is basically from the bottom up, and from the product form of the existing LED display, there are some in the form of the products of the existing LED display. Half of the optical flux disappears in the vast sky. In today's energy tension, do we have more reasonable solutions? Worth pondering.

　　2. LED display uniformity and clarity

　　The inconsistency of various performance parameters of LED is the main reason for affecting uniformity

　　The main reason to restrict the improvement of LED display clarity is uniformity rather than physical pixel spacing

　　To this day, LED display technology has become the most important indicator for measuring display screens. People often say that LEDs display "a little splendid, brilliant piece", which is a image metaphor that is seriously uneven between pixels and modules. Professional saying is "dust effect" and "mosaic phenomenon".

　　The root causes of uneven phenomena are: inconsistency of various performance parameters of LED; insufficient assembly accuracy during the production and installation process; insufficient consistency of other electronic components; irregularity of modules and PCB design. Among them, "inconsistency of various performance parameters of LED" is the main cause. The inconsistencies of these performance parameters mainly include: inconsistency of light strong, inconsistent light shafts, inconsistency of color coordinates, inconsistent light distribution curves of each base, and inconsistent attenuation characteristics. How to solve the inconsistent phenomenon of LED performance parameters, there are currently two main technical ways in the industry: one is to improve the consistency of various performances of LED through further subdivision of LED specification parameters; Uniformity. Subsequent correction has also developed from early module correction and module to today's one -time correction. The correction technology has developed from simple light and strong correction to light -strong+color coordinate correction.

　　However, we believe that follow -up correction is not a panacea. Among them, the optical axis inconsistent, inconsistent light distribution curves, inconsistency of attenuation characteristics, poor assembly accuracy, and irregular design cannot be eliminated by follow -up correction. Inconsistent worsening.

　　Therefore, through practice, our conclusion is that subsequent correction is only to treat the table, and the LED parameter segmentation is the root cause, the mainstream of the LED display industry in the future.

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