p3.91 indoor rental led display.Performance of LED driven ICs

　　Among the performance indicators of LED display, image refresh rate and grayscale expression are one of the most important indicators. This requires high consistency in the current between the channels of the LED display driving IC, high-speed communication interface speed, and constant response speed. In the past, the relationship between refresh rate, grayscale, and utilization has changed, sacrificing one or both of them to ensure better performance. Therefore, many LED display screens find it difficult to achieve both in practice, either due to insufficient refresh, black lines may appear during high-speed camera shooting, or due to insufficient grayscale and inconsistent color brightness. With the development of technology driving the development of IC research and development level, these problems can now be solved. In the application of LED full color displays, in order to ensure long-term eye comfort for users, low brightness and high ash content have become particularly important standards for testing the performance of driver ICs.

　　Driving IC Trends

　　1. Energy saving

　　Green and energy-saving is the eternal pursuit of LED displays, and it is also considered an important standard for driving IC performance evaluation. Driving IC energy-saving includes two aspects: firstly, reducing the inflection point voltage and constant current; The second is to reduce the working voltage and current by optimizing algorithms and IC design. The Idle Stop (Dynamic Low Power Consumption) energy-saving technology pioneered by Riyuesheng reduces power consumption, lowers screen temperature, and saves power when standby on a black screen. It is particularly suitable for LED displays that work continuously for 7 * 24 hours.

　　2. High integration

　　With the rapid decrease in pixel spacing of LED display screens, the installed packaging devices show exponential growth, greatly increasing the component density of the module. For example, in a small pitch P1.9LED, with 15 scans of 160 * 180, 90 modules require a constant current drive IC of 45 rows and 2138. So many available devices make PCB wiring space extremely crowded, thereby increasing the difficulty of circuit design. At the same time, such cumbersome component layout can easily lead to problems such as poor welding and reduce the reliability of the module. The smaller the number of driving ICs, the larger the PCB layout area, so the application requirements of driving ICs must be pushed onto the highly integrated technology roadmap. In recent years, we have been committed to the research and development of highly integrated ICs, resulting in a 71% reduction in the overall usage proportion of ICs compared to traditional ones; It also reduces the area of the IC itself, reduces the footprint of the PCB, and brings high-quality usage results to customers.

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