What is the difference between LED full-color display and LCD splicing screen?
Date: 2019-12-17
After years of development, the domestic LED display industry tends to develop in a standardized and centralized direction. Driven by technological innovation, fierce competition, changes in market demand, and policies, new features have appeared in the development of domestic LED displays this year. In general, the technical content of the product is generally higher, and the segmented products produced according to the different needs of the market thrive. So what is the difference between mainstream LCD splicing screens and LED full-color displays? Today, Jinghui Smart will analyze the difference between LED full-color display and LCD splicing screen.
Comparison of LED electronic display and LCD splicing screen
1. From the comparison of display effects, the final effect of the display device is the most core selection criterion, and different display technologies must have some differences in the display effect.
2. From the perspective of brightness, there is no need to worry about two stitching techniques. On the contrary, the small-pitch LED electronic screen, which is famous for its high brightness, faces the problem of over-brightness: one of the main marketing technology levels of the small-pitch LED display electronic screen is "low brightness". In contrast, the LCD screen is more appropriate in terms of brightness level, suitable for applications with large display screens. On the contrast index, the small-pitch LED is the best, but from the demand side, the contrast of the two major technologies exceeds the need for real display and the resolution limit of the human eye. This makes the contrast effect. The quality of the two technologies depends more on the optimization of the software than on the limit of the hardware.
3. In the resolution (PPI) index, although small-pitch LEDs have been breaking through, they still cannot compete with LCD splicing screens. Currently, only LCD screens can achieve 2K popularity on 55-inch units. There is hope and popularity in the future. 4K only has an LCD screen. For small-pitch LED electronic screens, higher pixel density means that the stability of the stability design has increased in geometric base. The pixel pitch has decreased by 50%, and the backplane density has to be increased by 4 times. This is why the small pitch LED has broken through the bottlenecks of 1.0, 0.8 and 0.6, but the real reason for the large number of applications is only products such as 3.0 / 2.5. In addition, it is worth reminding that the LCD screen has the advantage of pixel density "the actual value is not very clear "Because users rarely demand that high pixel density.
4. The color and color range is generally not the most concerned direction of video wall products. In addition to the application scenarios such as radio and television, the market for color recovery range has never been harsh. From a comparative perspective, small-pitch LEDs are natural products with a wide color gamut. Liquid crystal depends on what kind of light source is used.
5. The color resolution index is the actual viewing experience of the color range on the contrast index, which represents the ability of the display screen to ultimately restore the color. There is no method to brighten the measurement of this index. However, as a whole, small-pitch LEDs rely on color and The double advantage of contrast must be the best technology.
6, refresh frequency is a key indicator to effectively suppress the flicker of the screen. The refresh frequency of LED screens is generally very high. Most liquid crystals are at the level of 60-120Hz, which have exceeded the resolution limit of the human eye.
7. Point defects refer to the probability of bad, bright, dark, and color channels in display devices. In this regard, LCD products can also be controlled to an excellent level. In contrast, effective control of point defects is the main technology of LED screens. One of the difficulties, especially as the pixel pitch decreases, the control difficulty increases to a geometric base.
8. In terms of cell thickness, liquid crystals have inherent advantages, and they have been continuously optimizing and improving. Although small-pitch LED displays have now achieved hyperblog, there is not much room for improvement in the future. Big. In terms of optical pollution and visual comfort, liquid crystal mainly refers to glare and high-frequency blue light, and small-pitch LEDs have problems with over-brightness and high-frequency blue light.
9, core life indicators of consumables and display, mainly refers to the LED display lamp beads and back panel, LCD screen body and light source, the life advantage of liquid crystal is the most clear, the overall can reach 100,000 hours, LED screen lamp beads Individual differences and the stability of the back plate determine that the life differences between individual splices of such products are significant, and individual units may need to be replaced soon.
10. Engineering cooling is an inevitable requirement for long-term stable operation of large-size display systems. In this regard, LCDs have more significant advantages because of their low power consumption and low power density. Although small-pitch LEDs have the characteristics of low power density, However, the overall power consumption will still be higher. At the same time, small-pitch LED products that require high heat dissipation also mean that the system noise is higher.
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