With the continuous development of science and technology, the demand for high refresh rate in LED display in video playback, e-sports and other fields is growing. This requires in-depth optimization in driver chip and circuit design.
First of all, the performance improvement of driver chip is the key. Traditional driver chips may have delays and insufficient bandwidth when processing high-speed signals. In order to achieve high refresh rate, driver chips need to have higher operating frequency and faster data processing speed. For example, advanced CMOS process is used to reduce the size of transistors inside the chip, thereby increasing its switching speed and reducing signal transmission delay. At the same time, the cache structure of the chip is optimized and the data storage capacity is increased to ensure that image data can be acquired and processed in time at high frame rate to avoid screen tearing or jamming.
In terms of circuit design, the optimization of data transmission lines is crucial. High refresh rate means that a large amount of data needs to be accurately transmitted to each LED pixel in a short time. The use of high-speed differential signal transmission technology, such as LVDS (low voltage differential signal) or TMDS (transition minimized differential signal) in the HDMI 2.1 standard, can effectively improve the data transmission rate and anti-interference ability. Reasonably design the PCB circuit layout, shorten the signal transmission path, and reduce signal reflection and crosstalk. For example, isolate the data transmission line from the power line and ground line, and use a multi-layer PCB design to provide good shielding and reference plane for the signal.
In addition, the grayscale control circuit of the LED display also needs to be improved. Under high refresh rate, to achieve more delicate image display, it is necessary to accurately control the grayscale level of each pixel. Use a high-precision digital-to-analog converter (DAC) to improve the accuracy and speed of grayscale conversion. At the same time, optimize the grayscale correction algorithm, and dynamically adjust the grayscale value of the pixel according to different brightness environments and display content to ensure the color accuracy and contrast of the image at high refresh rates.
Finally, the stability of the power management circuit cannot be ignored. The high refresh rate LED display consumes a lot of power when working, and the power management circuit needs to be able to provide stable voltage and current to meet the needs of the driver chip and LED pixels. High-efficiency DC-DC conversion chips are used to reduce energy loss during power conversion, and perfect power filtering and voltage stabilization circuits are designed to reduce the impact of power ripple on display effects, ensuring that the LED display runs stably and reliably at high refresh rates.
