Diffused LED, also known as diffused light-emitting diode, is a type of LED that emits light in a uniform, soft, and non-directional manner. Due to its excellent performance and wide range of applications, diffused LED has become an important part of the LED industry. In this article, we will introduce the diffused LED industry from several aspects, including its development history, production process, market prospects, and application fields.

Development History of Diffused LED

The development of diffused LED dates back to the 1960s when the first LED was invented. However, at that time, the brightness of the LED was very low, and the light-emitting angle was narrow, which greatly limited its application. With the continuous development of semiconductor technology, the brightness and light-emitting angle of LED have been significantly improved. In the late 1980s, the diffused LED was born, which has brought a new breakthrough in the field of LED lighting.

With the continuous optimization of diffused LED technology, the quality and performance of diffused LED have been constantly improved. At present, diffused LED has become a mainstream product in the LED industry, and its application fields have been further expanded.

Production Process of Diffused LED

The production process of diffused LED mainly includes the following steps: raw material preparation, epitaxy, wafer slicing, surface treatment, chip packaging, and testing.

1. Raw material preparation: The raw materials used in diffused LED production mainly include gallium nitride (GaN), indium gallium nitride (InGaN), and other III-V compound semiconductors. These raw materials are prepared through chemical synthesis and crystal growth.

2. Epitaxy: The epitaxy process is to deposit a thin layer of semiconductor material on the surface of a substrate to form a single crystal structure. The epitaxy process is usually carried out in a high vacuum environment to ensure the quality of the crystal.

3. Wafer slicing: After epitaxy, the wafer needs to be sliced into thin slices for subsequent processing. The slicing process is usually carried out using a wire saw or a laser cutting machine.

4. Surface treatment: The surface of the wafer needs to be treated to improve its quality and performance. The surface treatment process usually includes polishing, etching, and coating.

5. Chip packaging: The chip is packaged with a package material to form a diffused LED chip. The packaging process includes chip bonding, encapsulation, and wire bonding.

6. Testing: After the chip packaging, the diffused LED needs to be tested to ensure its quality and performance. The testing process includes electrical performance testing, optical performance testing, and thermal performance testing.

Market Prospects of Diffused LED

With the continuous development of the global economy and the rapid growth of the LED industry, the market prospects of diffused LED are very promising. According to the data of the China LED Industry Association, the global diffused LED market size reached 2.5 billion US dollars in 2020, and it is expected to exceed 3.5 billion US dollars by 2025.

The rapid development of diffused LED market is mainly due to the following factors:

1. The continuous improvement of diffused LED technology, which makes its performance and quality constantly improve.

2. The wide range of application fields of diffused LED, including indoor lighting, outdoor lighting, automotive lighting, and other fields.

3. The continuous optimization of diffused LED cost, which makes it more competitive in the market.

Application Fields of Diffused LED

Diffused LED has a wide range of application fields, mainly including the following aspects:

1. Indoor lighting: Diffused LED can be used in various indoor lighting applications, such as home lighting, office lighting, and commercial lighting. Its soft light and energy-saving characteristics make it an ideal choice for indoor lighting.

2. Outdoor lighting: Diffused LED can be used in outdoor lighting applications, such as street lighting, landscape lighting, and tunnel lighting. Its high brightness, long life, and energy-saving characteristics make it an ideal choice for outdoor lighting.

3. Automotive lighting: Diffused LED can be used in automotive lighting applications, such as headlight, taillight, and brake light. Its high brightness, long life, and stable performance make it an ideal choice for automotive lighting.

4. Other fields: Diffused LED can also be used in other fields, such as medical equipment, display devices, and aerospace equipment.

In conclusion, diffused LED has a very promising market prospect and wide range of application fields. With the continuous development of technology and the optimization of cost, diffused LED will play a more important role in the LED industry in the future.