What is the driving role of the most milestone innovative technology in the LED display screen industry in the long river of industry development? Next, Xiaoguang will take you to learn more.
1. CGA display method drives the emergence of LED display screens
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In the early 1980s, with the development of computers, the CGA display method emerged, which has a resolution of 320 * 200 and four colors. In just 10 years, the display method has gone through CGA EGA、SEGA、VGA、SVGA， Developing towards ultra-high resolution, the display accuracy has increased from 320 * 200 to 1600 * 1250, from four colors to 32-bit true color, and the scanning frequency has increased from 15.7K to 150K. The working principle of a monitor is to receive signals from the host and display them in the form of light. With the development of people's need for a large screen device, display devices such as projectors have emerged. However, due to its own brightness, it cannot be used in high brightness environments, so LED displays have emerged. LED displays have the characteristics of large viewing angle, high brightness, and bright colors.
2. Ultra high brightness for outdoor full-color display
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Ultra high brightness refers to LEDs with a luminous intensity of up to or exceeding 100mcd, also known as candela level LEDs. The development of high brightness A1GaInP and InGaN LEDs has progressed rapidly, reaching performance levels that conventional materials such as GaA1As, GaAsP, and GaP cannot achieve. In 1991, Toshiba Corporation of Japan and HP Corporation of the United States developed InGaA1P 620nm orange ultra-high brightness LED, and in 1992, InGaA1p 590nm yellow ultra-high brightness LED was put into practical use. In the same year, Toshiba developed InGaA1P 573nm yellow green ultra-high brightness LED with a normal light intensity of 2cd. In 1994, Nippon Nihon Corporation developed InGaN 450nm blue (green) ultra high brightness LED. At this point, the three primary colors of red, green, blue, and multiple colors of orange and yellow required for color display have all reached candela level luminous intensity, achieving ultra-high brightness and full color, making outdoor full color display of light-emitting tubes a reality.
3. Single color, dual base color to full-color bring a brilliant visual experience
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LED display screens have gone through various stages, from monochrome and dual color graphic display screens to image display screens, but it was not until the mid-1990s that full-color screens emerged. Both in terms of performance (increased brightness LED displays and blue light emitting lights) and system composition (computerized full dynamic display systems), significant progress was made. The current level of ultra high brightness full color video display can be said to meet the requirements of various application conditions.
Up to now, full-color LED displays have been widely used, consisting of red, green, and blue LED lights, capable of displaying white balance and 16777216 colors. The emergence of full-color technology has brought a huge breakthrough in the image effect of LED displays. Nowadays, whether indoors or outdoors, the LED screens used are mostly full-color LED displays, which can maximize the display of advertisers' creativity and bring a highly impactful visual experience to the audience.
4. Surface mount packaging technology continues to mature and its application scope gradually expands
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In 2002, surface mount packaged LED displays were gradually accepted by the market and gained a certain market share, with many manufacturers launching such products. In recent years, with the rapid development of the three in one technology and continuous improvement of production processes, surface mount packaging technology has developed rapidly. Compared with direct insertion packaging technology, surface mount technology has many advantages such as a large perspective, good color consistency, good contrast, and light box weight. In addition, surface mounting technology has a high degree of automation and can be directly used in SMT high-speed mounting machines, directly improving product production efficiency and reducing costs.
Before the emergence of surface mount packaging technology, direct insertion technology became the mainstream in the LED display screen market. However, due to the difficulty in achieving high-density display, direct insertion LED displays can only be applied outdoors, greatly limiting the penetration of LED displays into the entire application market. The emergence of surface mount packaging technology undoubtedly promotes the application of LED displays in high-density indoor displays. With the advancement of LED chip technology and LED packaging technology, the brightness and protection level of surface mount LED displays can also meet the needs of outdoor applications, and have achieved rapid application. From this, it can be concluded that surface mount packaging technology not only expands the application range of LED display screens, but also has a trend of seizing the entire LED display screen market.
5. Synchronous control systems favored for achieving information timeliness
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Display screen synchronization control card, mainly used for real-time display of videos, graphics, notifications, etc. Mainly used for indoor or outdoor full-color large screen displays. The synchronous control system of the display screen controls the working mode of the display screen, which is basically equivalent to the computer monitor. It maps the images on the computer monitor in real-time at a rate of at least 60 frames per second, and usually has the ability to display multiple grayscale colors, which can achieve multimedia advertising effects.
Compared to asynchronous control cards with limited playback information, synchronous control cards have advantages such as real-time performance, rich expressive power, complex operation, high price, and can achieve complete synchronous display of content on computer monitors. This system is mainly used in places with high real-time requirements and is also favored by the current market.
6. Point by point correction system solves the problem of uneven brightness and chromaticity
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The issue of uniformity in brightness and chromaticity of LED display screens has always been a major challenge for industry professionals. It is generally believed that uneven brightness of LEDs can be improved through single point correction, while uneven chromaticity cannot be corrected and can only be improved by subdividing and filtering the LED color coordinates.
With the increasing demand for LED display screens, only subdividing and filtering the LED color coordinates can no longer meet people's picky eyes. It is possible to comprehensively correct the display screen to improve chromaticity uniformity. By 2010, it has gradually become an essential tool for the entry of control systems into the market. The point by point correction system is a comprehensive software and hardware system that can measure and correct each pixel on an LED display screen. This system can correct the brightness and chromaticity of each pixel on the entire screen, achieving consistent performance characteristics. To this end, the world's advanced monochromatic brightness and chromaticity correction technology is used to solve the problem of color inconsistency caused by inconsistent attenuation of light-emitting diodes of different colors.
7. The advent of 4K technology drives a new revolution in display
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The 4K LED display screen specifically refers to an LED display screen with a resolution of 3840 x 2160 pixels, which has a resolution four times that of a 2K (1920x1080) LED display screen and can receive, decode, and display video signals at the corresponding resolution. At this resolution, the audience can see every detail and close-up of the picture clearly, obtaining an immersive viewing experience.
After nearly two years of development, 4K LED display screens have become the preferred choice for high-definition LED displays in the minds of consumers. The finer display details, more realistic textures, and smoother smoothness brought by 4K LED display screens allow content to find better presentation methods. At the same time, 4K large screens not only improve resolution, but also drive a series of revolutions in related fields from shooting to display. Especially, the integration of 3D, VR/AR and other technologies with LED large screens is accelerated, which brings the audience a full range of three-dimensional and realistic impacts. It can even be equipped with interactive technology, allowing the audience to experience more stunning visual effects through human screen interaction. Therefore, 4K display technology makes LED display screens more impressive. The competitiveness in the field of display products has become very strong.light box maker melbourne