The invention of the white LED lightbulb

The invention of the white LED lightbulb

In 1993, a literal lightbulb moment led to the invention of the first white light emitting diode (LED).

These LEDs are now used to light up everything from our streets to our homes to this screen you’re looking at.

Along with two other Japanese engineers, Professor Shuji Nakamura, was behind this illuminating invention.

But Shuji’s journey to this point is one of resilience and perseverance. In his pursuit to discover the first commercial white LED, he had to overcome many obstacles along the way.

With less funding than his counterparts and one of the only inventors without a PhD degree, Shuji stood out from the crowd.

He set out to get his PhD degree and found one of the most sought-after inventions along the way.

Professor Shuji Nakamura speaks to Natasha Fernandes about finding the light and how it might not be what you would expect.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from football in Brazil, the history of the ‘Indian Titanic’ and the invention of air fryers, to Public Enemy’s Fight The Power, subway art and the political crisis in Georgia. We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: visionary architect Antoni Gaudi and the design of the Sagrada Familia; Michael Jordan and his bespoke Nike trainers; Princess Diana at the Taj Mahal; and Görel Hanser, manager of legendary Swedish pop band Abba on the influence they’ve had on the music industry. You can learn all about fascinating and surprising stories, such as the time an Iraqi journalist hurled his shoes at the President of the United States in protest of America’s occupation of Iraq; the creation of the Hollywood commercial that changed advertising forever; and the ascent of the first Aboriginal MP.

(Photo: Shuji Nakamura speaks during a news conference with LED lights on display. Credit: Kevork Djansezian via Getty Images)

Avsnitt(2000)

Art in Revolutionary Russia

Art in Revolutionary Russia

The Russian Revolution of 1917 led not just to huge political and social change, but to a new artistic freedom. Russian avant-garde artists like Malevich, Kandinsky and Chagall flourished in the immediate aftermath of the revolution. One of their greatest supporters was art curator Nikolai Punin. Louise Hidalgo has been talking to Punin's granddaughter, Anna Kaminskaia, about how that freedom was gradually replaced with censorship and repression, and her grandfather ended his life in the Gulag.Picture: 1920 painting by Boris Mikhailovich Kustodiev (1878-1927), Bolshevik (oil on canvas), Tretyakov Gallery, Moscow, Russia

8 Dec 201710min

The Discovery of Whale Song

The Discovery of Whale Song

In 1967 a biologist began listening to strange sounds recorded way out at sea, he realised it was whales and that they were singing. Claire Bowes has been talking to Dr Roger Payne about the discovery that helped change people's perception of whales and helped found the modern conservation movement at a time when whales were close to extinction. (Photo: Humpback Whale, courtesy of Christian Miller of Ocean Alliance)

7 Dec 201711min

Finland Wins Independence From Russia

Finland Wins Independence From Russia

In December 1917 Finland proclaimed its independence. For many centuries it had been controlled by its powerful neighbours, Sweden and Russia. As World War One raged across Europe and Russia was embroiled in its own revolution, Finnish intellectuals took the opportunity to push for their own state. But many ordinary people were more concerned with dire food shortages and the chaos caused by conflict. Olga Smirnova hears memories of that time.(Photo: 1917: A Communist base burning during the Finnish civil war. Credit: Getty Images)More personal stories from history of independent Finland can be found at the Finnish Institute in London http://www.taleoftwocountries.fi/frontpage/

6 Dec 201710min

Britain's withdrawal from South Yemen

Britain's withdrawal from South Yemen

In 1967 the British withdrawal from their colony of Aden led to the creation of the People's Republic of South Yemen. Britain had colonised the port city in 1839. Aden had been at the centre of the British colonial trading system and had been one of the busiest ports in the world. The handover has been described as one of the most chaotic in British colonial history. Farhana Haider has been speaking to the former British diplomat, Oliver Miles and to Ghassan Luqman who says the scars of Britain's quick withdrawal are still being felt in Yemen today.Photo: Aden 1967 Copyright: Alamy.

5 Dec 201710min

Mount Rushmore

Mount Rushmore

The four huge granite heads of former presidents on Mount Rushmore have become one of America's most famous monuments. Construction started on the site in 1927, led by sculptor Gutzon Borglum. His granddaughter Robin Borglum Kennedy speaks to Lucy Burns about his work.Picture: Mount Rushmore, June 1995 (KAREN BLEIER/AFP/Getty Images)

4 Dec 201710min

Science City in Siberia

Science City in Siberia

Thousands of scientists moved to deepest Siberia to dedicate their lives to research. The Soviet authorities began building the city in 1957. Academics were enticed there by the promise of housing and interesting work. Olga Smirnova spoke to Dr Victor Varand who made his life in Akademgorodok, or Academic City.Photo: Scientists at work in Academic City. Credit: Victor Varand.

1 Dec 20179min

The Poisoning of Litvinenko

The Poisoning of Litvinenko

Alexander Litvinenko was a former colonel in the Russian secret service, but fled to London seeking political asylum when he became critical of the Putin government in 2000. In November 2006 he was poisoned with the highly radioactive substance Polonium 210. Rebecca Kesby has been speaking to his wife, Marina, about his life and excruciating death.(PHOTO: Alexander Litvinenko in a London hospital a couple of days before his death in November 2006. Credit Getty Images.)

30 Nov 201710min

The Prestige Oil Disaster in Spain

The Prestige Oil Disaster in Spain

In November 2002, an oil tanker, the Prestige, sank off the coast of Galicia in north-west Spain, causing one of the worst environmental disasters in the country's history. In the following months, thousands of people from all over Spain travelled to Galicia to help clean up the spill. Simon Watts talks to Xavier Mulet, one of the volunteers.(Photo: Volunteers cleaning up after the Prestige. Credit: Xavier Mulet)

29 Nov 201710min

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