|The future of the LED Small Pitch Full Color LED Display Panels|
|LED small pitch display features: reliability
With the reduction of the dot pitch and the large increase in the number of lamp beads, this poses a great challenge to the reliability of small-pitch products. From the lamp wick, the technology is getting better and better. From the current practical application, due to the high density of lamp beads, the probability of failure in heat dissipation will be relatively high. In the case of more and more dense lamp beads, do a good job of dissipating the heat and the interface to ensure that the temperature of the screen body is maintained within a stable and reasonable range. This can solve the problems caused by temperature rise, and the failure rate is in the order of 1 million. The requirements of the first also require technical improvements in the wick and lamp beads.
The current industry standard is that the allowable value of the LED dead lamp rate is one ten-thousandth. It is obviously not suitable for small pitch LED displays. Due to the large pixel density of the small-pitch screen and the near viewing distance, if there is one dead lamp for 10,000, the effect is unacceptable. The future dead-light rate needs to be controlled in parts per million in order to meet the needs of long-term use. In the future, the technology still needs further improvement. The production process of small-pitch products also needs further refinement and improvement.
LED Small Pitch Screen Features: Uniformity
Compared with the conventional screen, the smaller LED display spacing will have problems such as afterglow, first-scan darkness, low-bright reddishness, and low-gray unevenness. At present, for technical issues such as persistence, first-scan darkness, and low-blood reddishness, the current technical problem is mainly the integration of LED control systems. Nowadays, small-pitch LED displays have become indoor splices. Traditional LED sending cards and receiving cards are Three physical connections are used. The probability of a failure is high through the connection and connection lines. The biggest challenge now is to combine the sending and receiving cards and connect them to one board to reduce the signal attenuation and hidden troubles of some physical interfaces and cable connections.
In order to solve these hidden troubles, companies have invested a lot of energy, through the efforts of the package end and the IC control terminal, which are currently effective in slowing down these problems. The problem of uniform brightness at low gray levels is also mitigated by the point-by-point correction technique. However, as one of the root causes of the problem, the chip end needs more efforts. Specifically, the brightness uniformity at low current is better, and the consistency of the parasitic capacitance is better.
LED small pitch display features: LED chip technology improvements
The LED chip, which is the core of the LED display, plays a crucial role in the development of fine pitch LED display screen. The current achievements and future development of small-pitch LED displays rely on the unremitting efforts of the chip end. On the one hand, the indoor display point spacing has gradually decreased from the early P4 to P1.5, P1.0, as well as the development of P0.8, P0.7. Correspondingly, the size of the lamp beads has shrunk from 3535 and 2121 to 1010. Some manufacturers have developed 0808 and 0606 sizes, and even some manufacturers are developing 0404 size. At the same time, the shrinking of the size of the encapsulated lamp beads inevitably requires a reduction in the chip size.
On the other hand, the smaller the surface area of the chip, the lowering of the brightness of the single core, and a series of problems that affect the display quality have also become prominent. One of the difficulties of the current small-pitch LED screen is "low light and low gray". That is, the gray scale at low brightness is not enough. To achieve "low light and high gray," the current package-end solution is a black bracket. Due to the weak reflection of the black support on the chip, the chip is required to have sufficient brightness. Through the improvement of chip technology, it has been possible to solve the problem of “low-light and low-gray”. Through feedback, users are very satisfied when they are watching. With the constant maturity of the small-pitch technology, the product performance continues to improve. It is believed that in the near future, the small-pitch LED display market will break these problems and achieve faster and better development.