Flip-chip COB display achieves high reliability, high brightness and ultra-small pitch with chip-level packaging, which is suitable for precision display; while flexible LED screen meets various curved surfaces and complex environment requirements with its excellent flexibility and environmental adaptability.
Both have their own characteristics, choose according to the application scenario.
Flip-chip COB display
Technical features
- Packaging technology: Flip-chip COB (Chip on Board) is a latest generation packaging technology that directly mounts the back (bottom) of the chip on the substrate, and the pins of the chip are led out from the other side of the substrate. This packaging technology is often used in high-speed and high-density circuits because it can provide better heat dissipation performance and shorter signal transmission path.
- Advantages:
- Better heat dissipation performance: The back of the chip is directly mounted on the substrate, which can better conduct heat from the chip to the substrate, thereby improving heat dissipation performance.
- Shorter signal transmission path: Since the pins of the chip are led out from the other side of the substrate, the signal transmission path is shorter, which can reduce signal loss and noise interference.
- Higher packaging density: Flip-chip mounting can save space and achieve higher packaging density.
- Better electrical performance: Shorter signal transmission paths can reduce signal delays and noise interference, and improve electrical performance.
- Lower thermal resistance: The system thermal resistance of COB packaging is much lower than that of traditional SMD packaging, which increases the life of LEDs.
- Higher reliability: Flip-chip COB directly binds the chip to the PCB board, eliminating the requirement for wire bonding connections, increasing the connection density of input/output (I/O), and making product performance more reliable and stable.
Application characteristics
- Display effect: The screen has no graininess, is smooth and flat, the device is closed and not exposed, and is waterproof, moisture-proof, anti-static and anti-corrosion.
- Touch and clean: The display screen can be touched at will, and the screen surface can be directly wiped with a rag if it is dirty or stained, which is easy to clean.
- Seismic and load-bearing: Epoxy resin glue is cured, and the seismic, anti-collision, collision-resistant and load-bearing capacity is 5 times that of ordinary LED displays.
- Technology threshold: Due to the high technology threshold, there are relatively more positive COB display screens on the market, but in applications with smaller pitch, flip-chip COB is the only method.
Flexible LED screen
Technical features
- Composition: The flexible LED screen is mainly composed of flexible modules, equipped with high-strength strong magnetic core connection devices, and a flexible FPC circuit board made of flexible insulating substrate. The mask and the bottom shell are both made of high-temperature resistant and bending-resistant silicone materials, with high-strength compression and distortion resistance.
- Main components: Including LED lamp beads, flexible substrates, drive circuits, lamp bead components, connection circuits and control systems.
- Display principle: Using the luminous characteristics of LED lamp beads and the control of the drive circuit, the brightness and color of the LED lamp beads are controlled to achieve the display of images and videos.
Application characteristics
- Flexibility and plasticity: Compared with traditional LED display screens, flexible LED screens have higher flexibility and plasticity, and can perfectly handle various “corners and corners” installation difficulties.
- Environmental adaptability: Due to its high strength of pressure resistance and distortion resistance, it can adapt to more harsh environments.
Summary
Flip-chip COB display and flexible LED screen each have their own unique technical characteristics and application advantages. Flip-chip COB display has significant advantages in situations requiring high-density and high-reliability display due to its excellent heat dissipation performance, electrical performance and reliability.
Flexible LED screen, with its excellent flexibility and plasticity, performs well in situations that need to adapt to various curved shapes and complex environments. When choosing, you need to weigh and choose according to the specific application scenarios and needs.