01. Display effect
The * final effect of the display device is the * core selection standard, and there must be some differences in the display effect between different display technologies. Of course, this is abstract. For details, please refer to the following table.?
02. Display brightness
There is no need to worry about insufficient use of both splicing technologies. On the contrary, the small pitch LED electronic screen known for its high brightness is facing the problem of over brightness - one of the main marketing technical standards of the small pitch LED electronic screen is "low brightness". In contrast, LCD is more appropriate in brightness level, and is suitable for the application of super large display screen. On the contrast index, the small pitch LED is *, but from the demand side, the contrast of the two technologies exceeds the requirements of real display and the resolution limit of the human eye. This makes the contrast effect of the two technologies more dependent on the optimization of software rather than the limit value of hardware.
03. Resolution (PPT) index
Although the small pitch LED has been making breakthroughs, it still cannot compete with the LCD splicing screen. At present, only the LCD screen can achieve 2K popularity on the 55 inch unit, and only the LCD screen is promising and can achieve 4K popularity in the future. For small pitch LED electronic screens, higher pixel density means that the difficulty of stability design shows an increase in geometric cardinal number. If the pixel spacing decreases by 50%, the backplane density must be increased by 4 times. This is why small pitch LED has broken through the bottleneck of 1.0, 0.8 and 0.6, but it is the root cause that only 3.0/2.5 products are really widely used. In addition, It is worth reminding that LCD has the advantage of pixel density, "the actual value is not very clear", because users rarely need such a high pixel density.
04. Color range
The index of color range is generally not the focus of the spliced wall products. In addition to the emphasis on application scenarios such as radio and television, the spliced wall market has never been strict with the demand for color restoration range. From a comparative perspective, small pitch LED is a natural product with wide color gamut. Liquid crystal depends on which light source is used.
05. Color resolution index
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 finally restore color. There is no method for the measurement of this index. However, on the whole, the small spacing LED must be a * technology by virtue of the dual advantages of color and contrast.
06. Refresh frequency
Refresh rate is the key index to effectively suppress the flicker of screen. The refresh rate of LED screen is generally very high. Most liquid crystals are at the 60-120Hz level, which has exceeded the resolution limit of the human eye.
07. Point defect
Point defect refers to the probability of bad spots, bright spots, dark spots and color tracks on the display equipment. In this respect, LCD products can also be controlled to an excellent level. In comparison, effective control point defect is one of the main technical difficulties of LED screens. Especially, with the reduction of pixel spacing, the control difficulty increases as a geometric cardinal number.
08. Unit thickness
In terms of cell thickness, liquid crystal has a congenital advantage, and has been constantly optimizing its progress; Although the small pitch led display screen has achieved ultra rich, there is not much room for future progress.
In terms of optical pollution and visual comfort, liquid crystal mainly refers to glare and high-frequency blue light, while small pitch LED is too bright and high-frequency blue light.
09. Consumables and display core life indicators
It mainly refers to the lamp beads and backplane of LED display, LCD screen body and light source. In this regard, the life advantage of LCD * is clear, and the overall life can reach 100000 hours. The individual differences of lamp beads and the stability of backplane of LED screen determine that the life difference between individual splices of these products is significant, and individual units may need to be replaced soon.
10. Engineering heat dissipation
Engineering heat dissipation is an inevitable requirement for the long-term stable operation of large size display systems. In this regard, LCD has more significant advantages because of its low power consumption and low power consumption density. Although small pitch LEDs have the characteristics of low power consumption density, the overall power consumption will still be higher. At the same time, small pitch LED products with high heat dissipation requirements also mean that the system noise will be higher.