Skip to content
Introduction:
LED packaging technology, as an important part of the LED industry, has attracted a lot of attention in recent years due to the rapid development of technology. Among various encapsulation technologies, COB (Chip on Board) LED display technology, with its significant advantages, is becoming a key development direction for LED display enterprises. LED manufacturers have increased their investment in the COB small pitch market, launching a series of technical achievements with industry impact. So, can COB packaging really lead to industry trends? In this blog, I will provide you with my insights for reference.
Outstanding advantages and challenges of COB technology
In recent years, the LED packaging industry has been developing rapidly driven by new materials and processes, and COB packaging has stood out and become the focus of the industry. Its main advantages are:
Thin and light design with efficient heat dissipation
COB LED display adopts 0.4-1.2mm thickness PCB board, which not only significantly reduces the weight of the screen body (about 1/3 of traditional products), but also effectively reduces transportation and installation costs.
At the same time, COB products directly encapsulate the LED chip in the PCB board of the concave lamp position, with epoxy resin adhesive encapsulation curing, the lamp point surface to form a smooth and hard spherical, with excellent anti-collision and pressure resistance.
PCB board of copper foil fast thermal conductivity design and strict process requirements to further enhance the heat dissipation efficiency, almost does not cause serious light attenuation, and greatly extends the service life of the LED display screen.
Flexible bending capability
COB package supports bending design, PCB bending will not cause damage to the encapsulated LED chip, suitable for making curved LED screen, round screen, wavy screen. Its seamless splicing, production costs lower than the characteristics of the flexible LED screen, making it the first choice for bars, nightclubs and other places to create a personalized LED screen.
All-weather performance and high reliability
COB technology adopts triple protection treatment, with waterproof, dustproof, anti-corrosion and other characteristics, adapting to the extreme temperature difference environment of minus 30°C to minus 80°C. At the same time, COB encapsulation eliminates multiple processes in traditional SMD encapsulation, significantly improving the stability and reliability of the screen.
However, COB technology still needs to address a number of challenges, such as the high cost of the process, the technical threshold for mass production, and market acceptance of the new technology.
Multiple benefits of market, policy and technology
With the homogenization of fine pitch LED display products and the bottleneck of SMD packaging technology becoming apparent, COB packaging is seen as the key to breakthroughs. Its high stability and ease of maintenance make it particularly suitable for high-end markets, such as command and control centers and other areas.
At the policy level, the support of national research projects is also a strong guarantee for the development and promotion of COB packaging. The triple drive of policy, technology and market also provides more room for application for the future development of COB packaging technology in the market.
Analysis of the core advantages of COB packaging technology
Fully sealed structure, IP65 protection grade
The COB display adopts a fully sealed design to achieve full protection against light spots, with excellent collision resistance, waterproof and dustproof performance. Highly stable and easy to maintain, a thin and light body saves space, and the HD display effect brings a more perfect visual experience.
High precision machining and flat display
Adopting high-standard CNC mold processing technology, the screen splicing error is almost zero, resulting in a flat screen without bumps, and a significant improvement in picture uniformity and color performance.
Superior cooling and silent design
COB process micro-pitch LED display adopts one-piece oxidation resistant die casting aluminum cabinet, which improves product temperature resistance, UV resistance and stress resistance. Adopt PCB board and box body synchronization uniform heat dissipation method, heat dissipation efficiency is high, equipment operating temperature control at 45 °C – 49 °C, no fan, silent operation.
Eliminates moire lines and effectively fights blue light damage
The high fill factor optical design of COB products, luminous uniformity, similar to the “surface light source”, effectively eliminating moiré. This makes the audience less prone to visual fatigue when watching and effectively resists blue light damage, giving users a real sensory experience.
Supports front maintenance, extremely thin and light
COB packaging technology directly integrates the light-emitting chip into the PCB board, reducing the thickness of the display board. Support front maintenance, the box adopts a high-precision aluminum die casting box, high strength and ultra-thin, delicate and beautiful, easy to install and carry, and greatly saves the space occupied by the display.
Ultra-high refresh rate with low brightness and high gray performance
The refresh rate is up to 3840Hz, ensuring a smooth and drag-free picture, while maintaining a fine gray scale under low brightness conditions, adapting to a variety of display environments. Combined with inverse gamma correction technology and point-by-point brightness correction technology, it makes the dynamic picture display more real and natural, uniform and consistent.
Point-by-point correction technology enhances picture quality
The point-by-point correction system will individually control each pixel in each display unit board, including brightness and color control, to achieve unprecedented uniformity and achieve thousands of LEDs that can achieve exactly the same luminous characteristics. Single module brightness and chromaticity correction technology is a good solution to the problem of color difference between the new module and the old module after the screen body replaces the module.
High frame rate, nanosecond response time
COB LED display adopts nanosecond display technology, which reduces the frame change time of LED display to very short. Compatible with 50Hz & 60Hz frame rate, eliminating the trailing and ghosting phenomenon that occurs when LCD and projection handle fast dynamic images. Ensure that the audience receives a coherent and clear image, which has great advantages in the field of video surveillance and broadcast display.
Dual power supply redundant backup function
COB LED screen unit supports dual redundant power supply, in case of power supply failure, automatically switches to another power supply, which can ensure the normal operation of the equipment, thus ensuring the safety of power supply.
Ultra wide viewing angle, perfect display at any angle
Adopt shallow well spherical light-emitting, so the viewing angle is wider, the larger the viewing angle of the screen, the clearer and more uniform the image. Macro-pitch LED display original wide viewing angle technology, with vertical and horizontal bidirectional ≥ 178 degrees ultra-wide viewing angle, display coverage area is larger, viewing no dead angle, no color cast, the image is always perfectly seamless, uniform and consistent.
High brightness and adjustable stepwise
The COB LED display unit has an ultra high brightness of up to 1200 cd/m2 and the brightness can be adjusted step by step in the range of 0~1200 cd/m2. This makes the display adaptable to any indoor lighting environment. Whether in the day or night, sunny or cloudy, whether in the relatively closed control room, conference room, or bright exhibition venues, lobby, etc., COB LED display can be the most appropriate display brightness to bring the audience the most comfortable viewing experience.
Energy saving and long life
COB display adopts LED lamps as energy-saving and environmentally friendly light source, with high photoelectric conversion efficiency, low power consumption, and anti-radiation.SRYLED Macro Pitch LED display products have been certified by RoHS, FCC, and passed the first grade energy efficiency test, etc. COB is more energy efficient than other LED displays. Under the same brightness, COB heat dissipation is smaller and more energy efficient.
Multiple installation options
COB LED screen supports a variety of installation methods, can be floor, can be suspended, can be inlaid, can be wall mounted. We can design the best installation plan for users according to the space, shape and decoration design of the installation site, so that the display and the surrounding decoration achieve perfect unity.
Future outlook
The emergence of COB technology has injected new vitality into small pitch LED products and promoted the technological upgrading of the industry. In the terminal market, its superior user experience and wide applicability have been verified. But the LED display industry never lacks innovation. There may be more advanced technology in the future, to bring new surprises to users.
Can COB packaging lead to industry trends? The answer is being tested over time. As the market continues to mature, COB technology is expected to occupy a larger market share in the display field. Let us look forward to its more brilliant performance.