LEDs, or Light Emitting Diodes, are manufactured by a wide range of companies globally, each specializing in different aspects of LED technology, from the production of raw LED chips to the assembly of LED lighting products. Here are some of the key players in the LED manufacturing industry:

1. Nichia Corporation - A Japanese chemical engineering and manufacturing company, Nichia is one of the largest producers of LEDs and laser diodes in the world. They are particularly known for their high-brightness LEDs and were the first company to mass-produce the white LED.

2. Cree, Inc. - Based in the United States, Cree is a market-leading innovator of lighting-class LEDs, LED lighting, and semiconductor products for power and radio-frequency (RF) applications. Cree's LED components are widely used in general lighting, video screens, and automotive applications.

3. Osram Opto Semiconductors - A subsidiary of ams OSRAM, this German company is a global leader in the development and manufacture of LED chips and other optoelectronic semiconductors. Osram's products are used in a variety of applications, including automotive, industrial, and consumer electronics.

4. Samsung Electronics - The South Korean giant is not only a leader in consumer electronics but also a significant player in the LED market. Samsung produces a wide range of LED products, including LED packages and modules for backlighting, signage, and general lighting.

5. Lumileds - Headquartered in the Netherlands, Lumileds is a global leader in the development, manufacturing, and distribution of LEDs and automotive lighting. Their products are used in general lighting, automotive lighting, and consumer electronics.

6. Everlight Electronics - Based in Taiwan, Everlight is one of the leading LED packaging companies in the world. They offer a wide range of LED products, including high-power LEDs, SMD LEDs, and LED lighting modules.

7. Seoul Semiconductor - Another South Korean company, Seoul Semiconductor is known for its innovative LED technologies, including the Acrich and WICOP series. They produce a wide range of LED products for general lighting, automotive, and backlighting applications.

8. Philips Lighting (Signify) - Now known as Signify, this Dutch company is one of the world's largest lighting manufacturers. They produce a wide range of LED lighting products for both consumer and professional markets.

9. LG Innotek - A subsidiary of LG Corporation, LG Innotek is a South Korean company that produces a variety of electronic components, including LEDs. Their LED products are used in automotive, display, and general lighting applications.

10. Epistar Corporation - Based in Taiwan, Epistar is one of the largest LED chip manufacturers in the world. They produce a wide range of LED chips for various applications, including display backlighting, automotive lighting, and general illumination.

These companies represent just a fraction of the global LED manufacturing industry, which includes hundreds of other firms specializing in various niches of LED technology. The industry is characterized by rapid innovation, with companies continually developing new products that offer higher efficiency, better color rendering, and longer lifespans. As the demand for energy-efficient lighting continues to grow, the LED manufacturing industry is expected to expand further, with new players entering the market and existing companies continuing to innovate.