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Your position:Home > News > Industry News > Too hot! Micro-LEDs need this .....

Too hot! Micro-LEDs need this pool "cold water"

  • Source:Net
  • Release on :2017-05-17
Shenzhen increased Opto Co., Ltd,LED RGB light supplier in China,LED Outdoor Stadium lighting manufacturer,LED Lamp Schedule Supplier.

     Recently released Apple Watch third generation to micro-led and Apple Taiwan Longtan Base Exposition News, so micro-led attention once again warming, the industry began to predict MicroLED industry before arrival, said OLED has not to be beaten surprised. Today on-line Jun to tell you how we should see micro-led development status quo.

     Although micro-led was preferred by the largest companies in the world, and, in the march, the technology in the specs are also more advantages than the LCD, and even image quality can be comparable to the OLED, but the development of technology at this stage is not with the news speculation that is the case, but it is difficult.

     As a veteran in the LED industry, today on the micro-led view, is it far away from us?

First, flip the LED chip itself has not yet the road

     For micro LED, it is more suitable for flip chip led, because flip chip led does not require metal wire, LED chip can reduce the gap between each other, so more satisfied micro LED display small size, easy to miniaturize needs.

    But the current mainstream lighting display led field, flip chip there is still process, yield, cost and other bottlenecks in the traditional use of the share of the LED industry are still in a relatively weak market share stage. Of course, flip-chip led industry is growing in use of the scale of growth, more and more involved companies, but the time sooner or later, but from the flip led to MicroLED flip there is still some distance to go.

Second, LED solid crystal yield control difficult

    To the current tire LED light bar process, for example in the production of an LED light bar there are dead pixels and other failures occurred, let alone a monitor to be embedded in millions of micro led. While the LCD and OLED batch operations have been, the yield performance is relatively good.

Third, led scale in transmission

     Future MicroLED show the difficulty lies in the embedded led process is not easy to take large amounts of operations, especially RGB 3 color LED is more difficult than monochrome. But the future with the LED stickers, pressure and other technical methods to improve, it is conducive to micro LED display in mass production stage.

Fourth, full color

    Currently, micro-led colorization method is predominantly RGB LED method, UV/blue LED + Light output medium method and optical lens synthesis method.

    RGB LED full color display is RGB three primary colors according to a certain ratio of synthetic color, the currently widespread led large screen method, and this is most likely on Sony's CLEDIS program. and is considered the best UV/Blu-ray LED + Light Output medium method, the problem is more.
    
    Mainly led, if the use of UV led, we all know that the current UV led luminous efficiency is very low, the yield of the products are the problem, so online Jun that this program achieve mass production cycle longer, let alone quantum dots.

    So the optimistic about the blue-based quantum dots program, although the current quantum point is still in a primary stage, but now in quantum dot business investment involved more and more, and Blu-ray LED technology is very mature, and now need to be overcome, as small the third optical lens synthesis method, personally as a priority to do the projection application.

    In addition, there is a color conversion technology, personal micro-led micro-display due to the monochrome led color conversion method is worth it because the monochrome RGB is much easier.

Fifth, the wavelength consistency, bin cost

    Mono Chrome micro-led array via flip chip package and driver IC can be achieved but the RGB array must be redistributed red, blue, green three-color grain, you need to embed hundreds of thousands of LED grain, for the wavelength the consistency of the requirements of a higher, while the cost of bin am also a technical bottleneck to the production.

Sixth, current congestion, accumulation of heat and other issues

    Micro-led (< 50 μm (μm)) differs from the general size (> 100μm) led properties. General size led almost no current crowd, heat accumulation and other problems, and through grating stress release and larger bright surface and can have better efficiency and other benefits. However, the larger area of the micro-led on surface defects and more large leakage away, micro-electrode to improve the series resistance, will affect the luminous efficiency.

Seventh, high cost


    One of the reasons is that led chip packaging, the existing LED display for the preparation of RGB LED chip, and then these chips integrated into a package, the formation of the LED as pixels use. So you need to have RGB color LED chip, and installed in a package, resulting in higher cost.

    And Sony does not have the details of this, but according to their data show that this technology will probably be high, although the new generation of products to reduce the PPI, but still very high. In addition, there are many high-cost links, such as binding, packaging, transfer, testing and equipment.

Conclusion:

    In short, micro-led wind is great, the technology is also very promising, but the landing is not so fast. Whether the last outbound Apple's third-generation watch will be used, or Sony's small pitch micro-led display, these are currently only samples, at least not large applications.

    And the current OLED technology upgrade soon, the advantage is more and more obvious, more and more mature technology, coupled with the layout of the majority of production lines, once the yield rises, the price will drop linearly, this alone, MicroLED also need very a long way to go.


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