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Mini-LED Shining at CES in The US, as TCL CSOT Leading The Display Of New Trends
Release time:
2020-01-09
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Mini-LED backlight has become an important direction for LCD panel upgrades. At the annual global Consumer Electronics Show event-CES in Las Vegas, the United States, TCL showcased the next-generation display technology Mini-LED. The display of this product comes from TCL CSOT MLED Xingyao screen, to show the world the scientific research strength of TCL CSOT in the field of display.

 

Mini-LED Shining at CES in The US, as TCL CSOT Leading The Display Of New Trends


In the display field, HDR has become the standard for high-end TVs, and Mini-LED technology can easily achieve the current HDR standard. In the future, Mini-LED will accelerate penetration in the display market, let the display return to the picture quality itself, and will also improve the situation in which LCD panel products have no power against OLED panel products in the market share grab.

 

Multi-giants display company developing the Mini-LED

 

Mini-LED is becoming the 'darling' of the display field. Since 2019, giants such as TCL, Apple, Hisense, Asus, Innolux, AUO, BOE and others have launched TVs, monitors, VR and in-vehicles with Mini-LED backlight or similar technologies. Display and other end products.

 

As early as January 2019, TCL released the Mini-LED backlight product as TCL X10 QLED 8K TV, with a screen size of 75 inches, a resolution of 8K (7680 * 4320), and a screen ratio of 16: 9. In addition to TCL, more giants have also launched Mini-LED backlight products. The Mini-LED backlight product released by Asus in January 2019 is ProArt PA32UCX, and the Mini-LED backlight product released by Acer in April 2019 is ConceptD CM7321K display. In addition, according to Digitimes report, Apple plans to launch Mini-LED backlight products at the end of 2020 or early 2021, including 10-12 inch iPad and 15-17 inch MacBook.

 

What is the driving force behind Mini-LED as a 'darling' in the display field?

 

Compared with OLED, Mini-LED backlit LCD has the advantage of being able to achieve the display effect, light and thin experience of comparable OLED panels at a lower cost, with large-scale mass production capability, longer life and lower power consumption. Mini-LED backlight can be used with flexible substrate to achieve curved display similar to OLED, and at the same time, it has more advantages than OLED in light source reliability.

Today, the development speed of Mini-LED is quite amazing. Many far-sighted companies are optimistic about their future development trend, and have intervened to share the 'cake'. The LCD panel giant grabbed the Mini-LED seems to have become a 'trend.' For example, TCL CSOT MLED Xingyao Screen is the world's first display product that uses TFT-LCD process combined with amorphous silicon glass substrate to drive active Mini-LED. This is a brand-new technological revolution that will maximize the potential of Mini-LED To the extreme.

 

TCL CSOT MLED Xingyao screen is committed to improving the display quality in all directions. The NTSC of Xingyao screen is up to 100%, which is a 38% + color gamut enjoyment compared to ordinary products. The picture quality experience is comparable to OLED, which can bring a new and stunning visual experience to the viewer; the traditional LCD contrast ratio is generally about 1000: 1, while the dual screen static contrast ratio is about 500,000: 1. The TCL CSOT MLED star screen has a contrast ratio of up to 1 million: 1, which has more perfect details; the OLED display will show 'lasting image' or 'burning screen' phenomenon, when a new image appears on the screen, it will still appear Some afterimages of the previous image. TCL CSOT Xingyao has a solution to solve the phenomenon of afterimage, and the dynamic picture is more smooth and clear.

 

In addition, TCL CSOT's first glass substrate integrated LED solution is green and environmentally friendly and supports sustainable development. LED high luminous efficiency cooperates with MLED 5000 area dynamic dimming to save energy and be more efficient. Compared with an On PCB Mini-LED product, it is equivalent to saving 182 500ml plastic bottles. In addition, the energy consumption of Xingyao screen can be reduced by 60% compared to OLED products. With a 75-inch product turned on for 12 hours a day, the power consumption of Xingyao screen will be reduced by 1515 degrees per year compared to ordinary products, which is equivalent to a family of three a year. The electricity consumption and environmental benefits are equivalent to planting an additional 40 square meters of forest.

 

'High threshold' benefits leading enterprises

 

However, it is not easy to divide the 'cake' in the Mini-LED field, mainly because the threshold of Mini-LED is high, and there are many difficulties in the current technology. Specifically, at the chip stage, the size of the Mini-LED chip is significantly smaller, so the requirements for wavelength consistency and thickness uniformity are increased, and the difficulty of yield control is increased; in the packaging stage, after the chip size is reduced, the requirements for the cutting stage are increased. The size of the beads is reduced accordingly, and the transition to new technologies such as four-in-one or COB has increased the difficulty. In the integration process, manufacturers need to fix thousands of Mini-LED chips on PCB substrates or glass substrates. There is still a qualitative difference in the transfer, but the difficulty has increased significantly compared to traditional LED products.

 

The technical difficulty of Mini-LED in terms of chip size, packaging process and module integration is not low. In addition, Mini-LED backlight modules are usually made on PCB boards. Due to the large number and small number of Mini-LEDs in the initial stage, the PCB The cost is usually more expensive.

Who can take the lead in solving these technical problems, and will take the lead when sharing Mini-LED 'cakes'. TCL CSOT, which holds many core patents, is more powerful in solving these technical problems. From January to September 2019 alone, TCL Group has invested 3.89 billion yuan in R & D and submitted 1,527 PCT international patent applications. As of the third quarter of 2019, TCL has submitted a total of 11,641 PCT international patent applications, covering Europe, the United States, and South Korea and other countries and regions; 41,296 Chinese patents; 11,704 foreign patents; and quantum dot public patents worldwide.

 

With a large number of technical reserves and patents, TCL CSOT developed the first 75-inch 8K MLED screen, using glass substrates instead of PCB boards as LED backplanes for the first time. MLED has a competitive advantage over conventional on-board Mini-LED and WOLED module costs.

 

The technical difficulties of installing Mini-LED on the glass substrate are reflected in the substrate production process and SMT printing process. In order to ensure a good soldering effect, TCL CSOT adjusts the production process sequence of the substrate and optimizes the process to solve the problem of easy oxidation of Cu, while ensuring that other characteristics of the substrate after adjustment are not affected; while in the SMT process, TCL CSOT repeats Try to adjust the opening size adjustment and tin amount adjustment of the steel mesh to solve the abnormal problem. In addition, TCL CSOT also uses innovative process optimization to ensure the brightness uniformity of the whole machine.

 

TCL CSOT's Mini-LED on glass has made technological breakthroughs in substrate design, SMT process, module assembly and driving algorithms. In the design of the substrate, TCL CSOT optimized the routing and line width design for high current drive; optimized the LED layout design for the optical effect; in the SMT process, TCL CSOT optimized the process to achieve the expected yield; module assembly, through optimization The heat dissipation and structural design of the module make the heat dissipation effect and module strength meet the standard. In addition, TCL CSOT also uses independently developed new technologies in the drive hardware and software algorithms to optimize the LED Local Dimming and display effects.

 

In addition to having a large number of technical reserves and patents, TCL CSOT also has the world's largest G10.5 production line, which is conducive to the production of ultra-large size Mini-LED on Glass products. In addition, TCL CSOT has the advantage of vertical integration, and products can be quickly mass-produced on the whole machine side.