Chip-on-Board COB LED Display Screen Material Analysis

COB LED display material analysis: COB LED display adopts the technology of directly packaging LED chips on PCB boards.

The main materials include high-performance PCB boards, high-brightness LED chips, epoxy resin or modified epoxy packaging materials. These materials ensure the high brightness, high stability and long life of the display screen, and are suitable for advertising media, exhibition displays and other fields.

Introduction

COB (Chip On Board) LED display is a technology that uses LED chips to be directly packaged on PCB boards. This technology improves production efficiency by simplifying the packaging process and makes the display have higher brightness and better quality. Color expression and lower failure rate. This article will conduct a detailed analysis of the materials of COB LED display screens and explore their key role in display screen manufacturing.

COB HD 4K 8K LED Wall Micro LED Display Installation

COB LED display overview

COB LED display directly packages the LED chip on the PCB board. Through precise molding process and packaging materials, the LED chip and PCB board are closely integrated. This packaging method effectively improves the luminous efficiency and stability of the display screen and reduces the failure rate, making COB LED displays widely used in advertising media, monitoring and security, exhibition displays and other fields.

COB LED display material analysis

PCB board

PCB board is the basic material of COB LED display, and its quality and performance directly affect the overall performance of the display.

COB LED display PCB board

PCB boards are usually made of glass fiber reinforced epoxy resin, copper foil and other materials, and have good electrical properties, mechanical properties and thermal stability. In COB LED displays, the PCB board needs to carry a large number of LED chips and drive circuits, so it is required to have high strength and stability.

LED chip

The LED chip is the core component of the COB LED display, and its luminous performance and stability directly affect the display effect of the display. At present, COB LED displays usually use high-brightness, low-attenuation LED chips to ensure that the display has a long service life and stable display effects. At the same time, the packaging form of the LED chip also has an important impact on the performance of the display screen. Generally, surface mount or direct plug-in packaging is used.

COB LED display chip

Packaging materials

Encapsulation material is an indispensable component of COB LED display. Its main function is to fix the LED chip on the PCB board and protect the LED chip from the external environment. At present, the packaging materials of COB LED displays mainly include epoxy resin, modified epoxy and silicone resin. These materials have different properties and characteristics. For example, epoxy resin has the advantages of strong bonding ability, low water absorption, and strong impact resistance; modified epoxy has the characteristics of good waterproof performance and is not easy to deform during packaging; silicone resin It has better high temperature resistance and electrical properties. Different packaging materials are suitable for different application scenarios and environmental conditions, so selection needs to be based on actual needs.

Drive circuit

The drive circuit is an important part of the COB LED display. Its main function is to convert the input signal into a current signal suitable for the operation of the LED chip, and to control the brightness and color of the LED chip. The performance of the drive circuit directly affects the display effect and stability of the display screen. At present, COB LED displays usually use constant current drive circuits or PWM drive circuits to ensure stable lighting of the LED chip and reduce energy consumption.

COB LED display material optimization

COB LED display material optimization

In order to improve the performance and reduce costs of COB LED displays, materials need to be optimized and improved.

For example, new PCB board materials can be used to improve its electrical and mechanical properties; more efficient LED chips and packaging materials can be used to improve the luminous efficiency and stability of the display; the design of the drive circuit can be optimized to reduce energy consumption and Improve display effects, etc.

These optimization measures will help improve the competitiveness and market share of COB LED displays.

Summarize

As a new type of display technology, COB LED display screen has wide application prospects in the fields of advertising media, monitoring and security, exhibition display and other fields.

Through a detailed analysis of the materials of COB LED displays, its key role in display manufacturing can be discovered. In the future, with the continuous development of technology and the expansion of the market, COB LED displays will be more widely used and developed.

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