Overcome the technical bottleneck of small-pitch LED display, itc makes the picture more brilliant

Compared with other display technologies, LED display screens have the advantages of self-illumination, excellent color reproduction, high refresh rate, power saving, and easy maintenance. The two characteristics of high brightness and large size can be achieved by splicing are the decisive factors for the rapid growth of LED display screens in the past two decades. In the field of large-screen outdoor displays, no other technology has been able to compete with LED display technology so far.

At present, small-pitch LEDs are mainly used in advertising media, stadiums, stage backgrounds, municipal engineering and other fields, and continue to open up markets in transportation, broadcasting and other fields. It can be predicted that in the next few years, small-pitch LED displays will continue to expand market share and occupy the market space for DLP rear projection.

In recent years, the pixel pitch of LED displays has become smaller and smaller, and the resolution has become higher and higher. The advantages of small-pitch LED displays in indoor large-screen display have become more and more obvious, and they have also brought small-pitch chip-side technology. The test of innovation.

The dot pitch of the indoor display screen gradually decreased from the early P4 to P1.5, P1.0, P0.8. The surface area of ​​the chip becomes smaller, and the brightness of the single core decreases, which becomes a problem that needs to be improved to affect the display quality.

At present, one of the problems of small-pitch LED screens is "low brightness and low gray", that is, the grayscale is not enough at low brightness. To achieve "low brightness and high gray", the chip needs to have sufficient brightness. Compared with the conventional screen, after the spacing becomes smaller, there will be problems such as afterglow, darker first scan, reddish low light and low gray unevenness. Therefore, the uniformity of brightness under low current is better, and the consistency of parasitic capacitance is better. Due to the large pixel density of small-pitch screens, the dead light rate needs to be controlled at one in 100,000 or even one in one million to meet long-term use requirements.

In the process of continuous improvement of chip-end technology, itc high-definition LED display has achieved smaller pitches, more compatible and reliable technological progress, and on April 9th, the successful "hard core" helped the "Guangdong Province Science and Technology Innovation Board" opening ceremony! As the main display screen of the venue, itc small-pitch LED large screen perfectly displays the content of the meeting with the characteristics of high-quality color reproduction, low brightness and high gray, no stitching, no reflection, no color difference, wide viewing angle, high refresh and high stability. At the important moment when the "Guangdong Provincial Science and Technology Innovation Board" announced the opening of the board, it provided clear and stable screen and video display support throughout the process to ensure the successful completion of the "board opening ceremony".

The visual experience promotes technological innovation. The chip end of the itc HD LED display constantly solves the technical problem of small-pitch display. The chip end optimizes the internal quantum effect through the epitaxy program, and improves the external quantum effect through the chip structure adjustment to improve the overall display brightness. The small-pitch LED chip needs to work in a non-linear working area close to 0, and the current is too small. The epitaxial direction of the LED chip needs to be optimized to reduce the lower limit of the linear working area; the second is the optimization of the chip splitting, which will have different characteristics The chips are distinguished to ensure current consistency. It is also necessary to improve the ESD capability and IR performance, and make more optimizations in the epitaxial structure and chip structure. When the chip is divided, strict grading standards are adopted to ensure the reliability of the chip side. Itc R & D engineers continue to innovate the display technology on the LED chip side to bring LED display system solutions with higher definition, more reliable and more comfortable viewing experience to various industries.