Quantum Dot Micro LED Display

Micro LED Challenges

Micro-LED technology holds promise to outperform OLED and LED-LCD displays, but faces key challenges that need addressing:

  • Red Efficiency
    Red efficiency drops significantly when scaled to micrometer sizes due to carrier loss and nonradiative recombination at sidewall defects. This results in lower brightness and higher power consumption, hindering adoption.
  • Brightness and Color Gamut
    While Micro-LEDs can theoretically achieve peak brightness up to 10,000 Nits and cover 100% of the Rec-2020 color gamut, current AlInGaP red LEDs struggle to reach 1000 Nits in real-world conditions, leading to high power consumption and reduced reliability.
the latest micro led display technology quantum dot cob display

Quantum Dot LED Displays: Revolutionizing Micro-LED Technology

  • High Efficiency: Achieves >99% color purity with ultra-thin QD layers.
  • Enhanced Durability: 8x lower flux density ensures long-lasting performance.
  • Superior Heat Dissipation: Nano-porous GaN enables >100W/m-K thermal conductivity.
  • Cost-Effective: Converts affordable blue LEDs to RGB, reducing production costs.
  • Precision Colors: ±0.5nm wavelength control for consistent, vibrant color output.
QUANTUM DOT COB LED DISPLAY P0.9 P1.25 P0.7

What Are Quantum Dots?

Quantum Dots are tiny, human-made particles with special light-emitting properties. They’re incredibly small, about 2 to 10 nanometers wide (that’s thousands of times smaller than a grain of sand). When light hits a Quantum Dot, it glows in a specific color. The color depends on its size: Big dots emit reddish light.Small dots emit greenish light.This ability to produce precise colors makes Quantum Dots ideal for vibrant and accurate displays.

Quantum Dot Micro LED Display

A Quantum Dot Micro-LED display uses electrochemical etching to create a nano-porous layer inside the GaN LED. This porous structure is then filled with quantum dots (QDs) that emit red (R) or green (G) light when excited by blue light. As a result, the display achieves addressable red, green, and blue (R-G-B) pixels within a single monolithic chip, providing enhanced color performance.

quantum dot Mini LED Display
Quantum dot rgb led color cob led screen

Traditional COB LED displays are comprised of red, green, and blue chips, each constructed from different materials. Green and blue chips typically use Gallium Nitride (GaN), while the red chip is made from Gallium Arsenide (GaAs). These material differences result in variations in light emission angles, temperature sensitivity, and production processes.

In contrast, Quantum Dot COB LED displays utilize blue light to excite quantum dots, which then emit red light. All three color chips—red, green, and blue—are fabricated from Gallium Nitride (GaN), ensuring consistent light emission angles across the entire color spectrum. Additionally, the brightness of these chips exhibits minimal sensitivity to temperature fluctuations, improving RGB color consistency even under varying temperature conditions, and ensuring stable, high-quality display performance.

quantum dot cob led display vs traditional cob led display

Quantum Dot COB LED D display VS Traditional COB LED Display

Quantum Dot COB LED Display Features

No Substrate Transfer—Improved Yield

Quantum Dot red and blue-green light chips share the same substrate, eliminating the need for substrate transfer. In contrast, traditional GaAs chips require conversion to sapphire substrates, a process that leads to significant yield loss and increased cost.

Quantum Dot Mirco LED Display

Superior Color Uniformity under wider Viewing Angle

Quantum dots LED screen offer precise control over their wavelength, allowing for exceptionally narrow wavelength distribution. This ensures that the wavelength variation within and between wafers is limited to just ±0.5nm, resulting in highly consistent and pure colors across the display.

quantum dot led display wavelength

Wider viewing angle-No Color Deviation

Quantum Dot LED Screen offers consistent display performance across various viewing angles.By using uniform materials for all three colors, the light output is consistent, ensuring uniform display quality from any angle.

When the viewing angle shifts from 0° (front-facing) to 85°, the color deviation of Quantum Dot direct-view displays is reduced by 8 times compared to traditional displays, with color temperature differences being up to 12 times lower.

WIDER VIEWING ANGLE QUANTUM DOT DISPLAY

Superior Color Accuracy Across Temperature Variations

Due to the precise size control of quantum dots, Quantum Dot chips generate a narrow red light spectrum (2nm), ensuring exceptional consistency in red light output. Compared to traditional displays, Quantum Dot Micro-LED (QD-mLED) technology is significantly less sensitive to temperature fluctuations. As a result, color uniformity variations caused by temperature changes during startup are reduced by 20% compared to conventional screens, maintaining superior color accuracy across a wide range of temperatures.

QCOB quantum dot cob led display mirco led screen

Eco-Friendly Quantum Dot LED Screens

In traditional displays, the key materials for the red light substrate are Gallium Arsenide (GaAs) and Phosphine, both of which are toxic.

In contrast, Quantum Dot LED screens use eco-friendly materials: Silicon (Si) or Sapphire for the red light substrate and Ammonia gas (NH₃) for red light growth. This eliminates the use of harmful substances like Arsenic and Phosphine during the manufacturing process, making Quantum Dot LED screens a more environmentally sustainable option.

eco friendly quantum dot cob led display

Reduced Power Supply Costs

In Quantum Dot Micro-LED (QD-LED) displays, the red light driving voltage aligns with that of the blue and green channels, eliminating the need for dual-voltage interfaces commonly required in traditional direct-view displays. This design optimization results in a 15% reduction in overall power supply costs.

REC2O2O QUANTUM DOT COB LED DISPLAY

Enhanced Color REC 2020

Experiments have demonstrated that Quantum Dot COB LED displays deliver exceptional color gamut performance, achieving 80% coverage of the Rec. 2020 color space. This ensures vibrant and accurate color reproduction, enhancing the overall viewing experience.

120hz quantum dot led display

120Hz Broad-casting Level

With a 120Hz frame rate and broadcast-level performance, Quantum Dot LED displays are perfect for applications like cinemas, home theaters, and XR studios, delivering seamless motion and stunning visual quality.

Discover the future of display technology with Quantum Dot Micro-LED Display. Experience superior color accuracy, energy efficiency, and stunning brightness. Contact us today to learn more and elevate your display solutions!

Virtual Pixel COB LED Display

What is Virtual Pixel Technology

Virtual Pixel Technology,also called dynamic pixel technology, is a technique that uses software algorithms to control the LED units in a display, so that each unit can contribute to the image of multiple pixels, thus increasing the resolution of the display by up to four times. It is different from the real pixel, where each unit corresponds to one pixel.

For example, a conference all-in-one machine that uses Virtual Pixel Technology can achieve a near 4K resolution with the same number of LED units as a 2K resolution machine. This improves the display quality and uniformity, while reducing the cost. It is a good choice for most users who want a high-definition display.

virtual pixel micro led display
virtual pixel cob compare with real pixel cob
real pixel vs virtual pixels cob led display

Virtual pixel Micro COB LED Display 

Virtual Pixel Technology is also a special innovation for COB packaging, which allows the RGB LED chips to be arranged in any way, unlike the SMD small pitch display technology. 

Virtual pixel display technology is a new way of making Micro LED display products that are more cost-effective and high-resolution. It uses a different hardware and software design than the traditional RGB arrangement of LED chips. Instead, it adds a green LED chip to each pixel and uses a special algorithm to create four virtual pixels from one physical pixel. This reduces the pixel pitch by half and increases the resolution by four times, while using fewer LED chips and lowering the production cost. Virtual Pixel-COB display technology is an innovative and advanced solution.

Advantages of COB Virtual Pixel Technology

“Virtual pixel technology can make LED display screens have more than twice the visual clarity at almost the same cost. It is a magic tool for making LED display screens more affordable and high-quality!” Industry experts said that virtual pixel technology is very important for LED direct display, which is a type of display that becomes harder and more expensive to make as the pixel pitch gets smaller.

 

Take the most popular product,p1.56 136-inch all-in-one LED TV, for example. the 5 square meters LED display only has a 2K resolution, which is not enough for displaying 4K and other high-quality content. It also has a noticeable “pixelation” problem when viewed from a closer distance.

Virtual pixel technology can solve this problem by increasing the logical pixels in the resolution to 4K levels, with only a small increase in cost. This means that the screen can look much clearer and sharper, even though it is not using real physical 4K pixels. Virtual pixel technology is a cost-effective, reliable, and mature technology that can enhance the picture quality of LED direct display screens.

virtual pixel vs real pixel COB LED DISPLAY
virtual pixel cob led display
cob led display modules indoor common cathode
virtual pixel cob led screen copy

Dynamic Pixel COB LED Display

Disadvantages of Virtual pixel COB.

Dynamic pixel technology is not a perfect solution for Micro LED display products.

  • The inherent nature of pixel sharing in virtual pixel technology can lead to a degradation in display quality as the level of virtual enhancement increases. Observations from current display implementations indicate that, at closer viewing distances, the imagery may present a granular appearance, with static text particularly susceptible to displaying jagged edges. This has sparked some skepticism within the market, with critiques suggesting that virtual pixel products might mislead consumers. Such sentiments contribute to a lack of enthusiasm and support for the technology.

virtual pixel ,dynamic pixel cob led display text display
  • It does not use real physical pixels, so it may not work well in some situations. It also makes the chip work harder and faster, which may cause it to wear out sooner and decrease the life span.

Dynamic Pixel COB LED Display for Commercial Advertising

From an objective standpoint, virtual pixel technology does exhibit tangible limitations in image fidelity. Beyond a certain proximity, distinguishing between the effects of virtual and actual pixels becomes challenging for the observer. However, it’s important to consider the technology’s application context. Beyond specialized domains such as command and control centers or medical imaging, where precise visual detail is paramount, the demand for high-fidelity close-viewing experiences in settings like conference rooms and commercial spaces is relatively modest. These environments represent the niche where virtual pixel technology can indeed shine, leveraging its capabilities where they align with the practical requirements of the application.

Advantages of Virtual cob led display in commercial advertising 

Cost-Effectiveness: By requiring fewer physical pixels to achieve high resolutions, dynamic pixel COB LED displays significantly reduce manufacturing and operational costs. This makes them an economically viable option for businesses seeking high-quality advertising solutions without the high expense typically associated with large or high-resolution digital screens.

Energy Efficiency: Lower pixel density translates to less energy consumption, as fewer LEDs are needed to create an image. This energy efficiency not only reduces operational costs but also aligns with growing environmental sustainability goals among corporations.

Durability and Reliability: COB technology inherently offers greater protection for LED chips, as they are encapsulated directly on the board. This encapsulation provides superior resistance to impact, moisture, and dust, extending the lifespan of the display and ensuring consistent performance in various commercial settings.

Versatility and Visual Quality: Dynamic pixel COB LED displays can adapt to a wide range of commercial advertising needs, from outdoor billboards to indoor signage. They offer excellent visual quality, with vibrant colors and deep contrasts, making them highly effective for capturing consumer attention in competitive advertising environments.

Future Outlook

When we want to make display screens with very high resolution, like 4K or 8K, it becomes very hard and expensive to do. Also, when we look at the screens from a normal distance, like how we use our phones or watch TV, we cannot see the difference between more or less pixels. So, it does not make sense to keep adding more pixels to the screens. Instead, we should make products that look good and clear to our eyes. That is why virtual pixel technology is very popular. It makes the screens look better without using too many pixels.

The future of commercial advertising with dynamic pixel COB LED technology appears bright, with continuous advancements expected to further enhance resolution, cost-efficiency, and application versatility. As businesses increasingly seek innovative ways to engage with audiences, dynamic pixel COB LED displays stand out as a promising solution that balances cost, performance, and visual appeal. Their adaptability and efficiency position them as a preferred choice for advertisers aiming to make a significant impact in a crowded market.

cob led screen common cathode

Virtual Pitch COB LED Display Modules: Pixel pitch covers P0.4-P1.8 .

  •  600-1,200nits brightness
  •  18Bit grayscale
  •  up to100,000:1 contrast ratio
  •  HDR 10 supported
  •  120% NTSC color gamut
  •  7,680Hz refresh rate
  •  Extremely high protection performance
  • Single Module Calibration Technology
  • onforms to industry standards and specifications
  • Self-developed optical display technology greatly protects the eyes
  • Multi-scene applicability

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