Rectangular LED, also known as rectangular light-emitting diode, has become a popular choice in the field of lighting technology. With its unique design and excellent performance, it has been widely used in various applications such as indoor lighting, outdoor lighting, and display screens. This article aims to provide an in-depth introduction to the rectangular LED industry, covering its history, technology, applications, and market trends.

History of Rectangular LED

The history of LED technology dates back to the early 20th century. In 1907, the British physicist Henry Joseph Round discovered that when a semiconductor material is forward biased, it emits light. However, it was not until the 1960s that the first practical LED was developed by Nick Holonyak Jr. at General Electric. Since then, LED technology has been rapidly developed and has become an essential part of modern life. The rectangular LED was first introduced in the 1980s. At that time, due to the limitations of LED chip technology, the shape of the LED was mainly round. However, with the continuous improvement of LED chip technology, the rectangular LED began to appear in the market. In the 1990s, with the rapid development of the LED industry, the rectangular LED gradually became the mainstream product in the market.

Technology of Rectangular LED

The rectangular LED is a semiconductor device that emits light when an electric current passes through it. The core component of the rectangular LED is the LED chip, which is a semiconductor material with a p-n junction. When the electric current passes through the p-n junction, the electrons and holes recombine, releasing energy in the form of light. The technology of rectangular LED mainly includes the following aspects: 1. LED chip technology: The quality of the LED chip directly affects the performance of the rectangular LED. Currently, the mainstream LED chip materials are gallium nitride (GaN), silicon carbide (SiC), and zinc selenide (ZnSe). 2. Packaging technology: The packaging technology of rectangular LED is mainly divided into two types: lead frame packaging and chip-on-board (COB) packaging. The lead frame packaging has good heat dissipation performance, while the COB packaging has higher light output and better luminous uniformity. 3. Driver technology: The driver is an important part of the rectangular LED, which is responsible for converting the alternating current (AC) into direct current (DC) and providing the necessary voltage and current for the LED to work. The driver technology mainly includes constant current driver, constant voltage driver, and smart driver.

Applications of Rectangular LED

Rectangular LED has a wide range of applications due to its excellent performance. The following are some of the main applications: 1. Indoor lighting: Rectangular LED is widely used in indoor lighting, such as office buildings, shopping malls, and residential areas. It has the advantages of energy saving, environmental protection, and long service life. 2. Outdoor lighting: Rectangular LED is also used in outdoor lighting, such as street lights, tunnel lights, and landscape lights. It has the advantages of high brightness, low power consumption, and strong anti-interference ability. 3. Display screens: Rectangular LED is used in display screens, such as LCD screens, LED screens, and billboards. It has the advantages of high brightness, high contrast, and wide viewing angle. 4. Industrial applications: Rectangular LED is also used in industrial applications, such as machine vision, barcode scanning, and medical equipment.

Market Trends of Rectangular LED

The rectangular LED market has been growing rapidly in recent years. The following are some of the main market trends: 1. Energy-saving and environmental protection: With the increasing awareness of energy-saving and environmental protection, the demand for energy-saving and environmental-friendly rectangular LED products is increasing. 2. High brightness and high color gamut: As the application fields of rectangular LED expand, the demand for high brightness and high color gamut products is increasing. 3. Miniaturization and integration: The continuous development of LED technology has led to the miniaturization and integration of rectangular LED products, which has brought more convenience and comfort to people's lives. 4. Market competition: The rectangular LED market is highly competitive, with a large number of manufacturers and products. In order to maintain a competitive advantage, manufacturers need to continuously improve product quality and technology. In conclusion, rectangular LED has become an essential part of the lighting industry. With the continuous development of technology and the expansion of application fields, the rectangular LED market is expected to maintain a rapid growth momentum in the future.