I. Introduction
In recent years, the application of full-color LED display in stadiums, road traffic, advertising, leasing, etc. has shown a rapid growth trend. According to the forecast of the international market of LED display products by Standford Resources of the United States, the current and future market adoption of LED display products will be based on full-color and high-definition quality, so it is necessary to display control technology and new products on LED large screen. The design aspect keeps abreast of market trends, overcomes the corresponding technical difficulties of high-end products and completes the development of high-end new products.
This paper combines domestic and foreign LED display technology, focusing on the development of related indicators and key technologies that affect the display effect of LED displays.
Second, the improvement of LED display technology indicators
The level of grayscale, contrast, refresh rate and other technical indicators of the full-color LED display directly affect the display effect of the full-color LED display.
1, gray level
The gray level refers to the brightness level that can be distinguished from the darkest to the brightest in the single primary color brightness of the LED display. The higher the gray level of the LED display, the richer the color and the more vivid the color; otherwise, the display color is single. The change is simple. The increase of the gray level can greatly increase the color depth, so that the display level of the image color increases geometrically. Daktronics' LED grayscale control level is 14bit~16bit, which makes the image level resolution details and display effects of high-end display products reach the world advanced level. With the development of hardware technology, LED gray levels will continue to develop toward higher control precision.
2, the contrast is improved
Contrast is one of the key factors affecting visual effects. Generally speaking, the higher the contrast, the clearer and more conspicuous the image, and the more vivid the color. High contrast is very helpful for image sharpness, detail performance, and gray level performance. In some text and video displays with large contrast between black and white, high-contrast LED displays have advantages in black-and-white contrast, sharpness, and integrity. Contrast has a greater impact on the dynamic video display. Because the light and dark transitions in the dynamic image are faster, the higher the contrast, the easier it is for the human eye to distinguish such a conversion process.
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