An Overview of Mini-LED Technology and Component

Aug 10, 2021

Mini-LED technology is the miniature version of the traditional LEDs that emit light and a refinement of current LCD LED technology. Mini-LEDs work together to provide the backlight on LCDs, lying beneath the LCD matrix and providing finer control over light intensity, resulting in a higher contrast ratio.

The design of LEDs are compact and more of the LEDs can be put into the same space now. Based on the size of the screen, this permits countless LEDs to be placed into a panel.

Different Applications of Mini-LED

  • Mini-LED Backlight

The service of Mini-LED has been further expanded to meet the soaring demands, more advanced applications in various fields have been developed. Among all the diverse innovations of mini-LED technology, we will introduce the one in 3C electronic, especially the usage of mini-LED backlight.

  1. Smartphone

The prominent challenge for VR application lies down on thin and lightweight displays. Thanks to the benefits of mini-LED technology such as high brightness, low power consumption, low heat generation, and rapid response time, VR equipment can now develop without concerning the performance of core component.

  • Mini-LED Display

The market structure is slowly shifting due to the development of mini/micro-LED. Domestic and international display producers have consecutively introduced pitch 0.9- products and are aggressively deploying extra-small pitch displays in the field of tiny pitch (P1.25) displays. Traditional panel makers are aggressively fighting for the future display market in the corporate world.

Because the single LED device is tiny, the standard SMD packaging is too difficult to produce, leading to the insufficient of precision for lower pitch products. Inventors have created a new sort of mini COB product that is more precise than standard one-piece design.

A chip on board (COB) design can be used to incorporate small LED displays, controlling the brightness and colors of each mini-LED technology in the display without the requirement for an externally integrated driver. Mini COB provides several advantages, including the ability to successfully prevent issues caused by humidity, static electricity, and other environmental or human variables in standard SMD packaging narrow pitch LEDs. Heat is dissipated directly via the PCB board, which results in a greater heat dissipation effect, thus the costs of the follow-up maintenance can be reduced

  • Automotive section

Direct-view LED screens in vehicles are another use for which tiny LEDs were created. When viewed directly, OLED displays can be excessively bright, yet when viewed indirectly, they can be too dark, making them unsafe for use in-car displays. Because of their greater granularity and brightness control, mini-LED technology has overcome this problem. Backlighting for automobile displays such as HUDs, dashboards, in-vehicle entertainment systems, and rearview mirror displays has shifted to mini-LED. Mini-LED was also used by certain LED manufacturers to demonstrate conceptual uses of exterior car lighting.

Component of Mini-Led Technology

Thousands of small LED backlights are used in mini-LED technology to provide substantially improved local dimming characteristics. These backlight diodes must be smaller than 0.2mm wide to be classified as mini-LEDs. LCD screens require local dimming because backlight bleed causes poor blacks and contrast ratios as compared to OLED displays, which have individual pixels that switch on and off. This is a hybrid method that tries to mimic OLED's emissive properties while requiring less design complexity:

  1. Mini-POB solution (Gypsophila solution)

To achieve a broad light-emitting angle from the lamp beads, 1919 package size lamp beads are used on the PCB. And the lamp beads should have an OD of 5-12mm. It is a high-quality choice for the backlight solution of mid-to-high-end TVs, with a limited number of lamp beads in the backlight solution and the current solution's cost being significantly cheaper than the mini COB solution. Lightness and thinness, as well as high brightness, dynamic ratio, and color gamut, are all possible with this product. The firm can supply highly cost-effective solutions for TVs of all sizes and OD values, as well as local dimming IC, drive solutions, and PCB circuit architecture.

  1. Mini-LED Display

Mini-LED displays are available in two series: COB MODULE with module, cabinet, integrated solution and uPKG LED. The reliable mini-LED display solution providers such as Refond serve the market with the high-end mini-LED display products, with applications across various industries, including surveillance system, conference, advertising display, cinema, plaza and outdoor large screen, etc

  1. Mini-COB solution

Flip-chip in its entirety mini-COB solution technology reduces the need for SMD brackets and SMT reflow soldering, while also reducing the danger of inadequate soldering and increasing dependability. The full-flip COB provides surface protection and can resist larger external pressures, lowering the expense of damage and maintenance in the future. The whole flip chip is directly placed on the PCB, lowering the bonding wire eutectic failure factor and increasing dependability.

Technical Advancement of Mini-LED Technology

Deeper blacks, better contrast ratios, and brighter screens are possible thanks to millions of tiny backlights, which is ideal for HDR content. It's all because of the smaller components. Because the size and density of the backlights are not limited, mini-LED technology can readily grow from tiny to large panel sizes.

Refond’s Technical Advantages and Achievements

Refond began working with large local and international customers to create mini-LED-related goods. We were the first in China to start researching and developing mini-LED technologies, and we have a significant technological and customer base.The Mini-related technology of ours can be used in a variety of electronic devices, including smartphones, televisions, tablets, and virtual reality headsets.

In close collaboration with well-known electrical businesses both at home and abroad, Refond has created a variety of mini-backlight and display product solutions. Refond optoelectronics built the first mini-LED technology automated manufacturing line in 2017. And we are one of the first companies in China to accomplish mass manufacturing of mini-LED goods.

Conclusion

Mini-LED technologies are the ultimate experience, combining the benefits of conventional LCDs with OLED screens. They provide the contrast of OLED panels while being considerably easier and less expensive to manufacture than OLED displays. Furthermore, because Mini-LED technology panels are so simple to make, they may be utilized to make small displays like those seen on laptops, tablets, and even smartphones.