The Timeline of LED Technology

1860 - Niels Ryberg Finsen

The Beginnings of Light Therapy: Niels Finsen, a Danish medical scientist, developed an artificial lamp that mimics sunlight and studied the biological and therapeutic effects of light rays, and contributed greatly to the treatment of lupus (skin tuberculosis). This research was the beginning of Light Therapy.

1903 - Endre Mester

The Discovery of Low-power Phototherapy: While conducting an experiment using a low-power red laser, Mester, a Hungarian doctor, discovered the effects of low-power lasers on wound healing and fibromyalgia. Since then, with the treatment of skin ulcer patients and the writing of more than 100 papers, he has been called the father of low-power phototherapy and photo-biomodulation.

1928 - Nick Holonyak

Invention of the RED LED: Nick Holonyak, an American scientist, invented the first red visible light LED as he continued research on visible light semiconductor lasers and light emitting diodes to develop a four-element compound semiconductor. Today, this technology is used in a variety of applications including medical diagnostic equipment, surgery, and ophthalmology.

1971 - AT&T Bell Lab

Invention of the GREEN LED: After the red LED was invented, the green LED was implemented from the Gallium Phosphide (GaP) p-n junction doped with nitrogen by Logan et al. Through this invention, technology can realize most colors that can be obtained in nature with light.

1989 - Shuji Nakamura, Isamu Akasaki and Hiroshi Amano

Development of the BLUE LED: Nakamura, Akasaki and Amano succeeded in developing the first blue LED in Japan in 1989. With the development of blue LEDs, white LED production becomes possible, and LED development develops rapidly.

2000s - National Aeronautics and Space Administration (NASA)

Expanded LED utilization based on various effects researched by NASA and applicable to the medical field. While researching how to grow crops in spacecraft with artificial light sources, it was discovered that red LED wavelength promotes the energy metabolism of cells that activates plant growth and photosynthesis. It was also discovered that wound healing was accelerated due to skin cell regeneration.

NOW: CELLRETURN delivers innovation with LED Devices

CELLRETURN has produced a range of innovative LED devices using the unique therapeutic effects of LED technology, being granted several patents along the way. CELLRETURN now intends to become a leading global company in beauty, healthcare and medical devices by continuing to innovate in this exciting and growing area.