Presenting a convincing argument usually opens many doors. For example: LED lights last about 50,000 hours before failing. That equates to about 5 years switched on constantly.
Behind this invention is the work of many researchers and a story of genius and inventiveness that began with the idea for the original Humphry Davy bulb.
The first LED did not appear until 1962, when Nick Holonyak successfully completed a project that took many experiments and hours in the laboratory to get right. Below we will tell you the story of LED lights from their origin to the present day.
The forgotten work of H.J. Round
Many inventors have contributed to making it possible for us to have light today, but one inventor who is rarely talked about is Henry Joseph Round, an English electronic engineer who was the first person to come up with the theory behind LED lights.
Born in 1881, he is best known for his contribution to the development of radio communications and his work for the British Navy. In fact, his work was decisive in the victory during the naval battle of Jutland in 1916, in the First World War, as his radio system alerted English ships to the departure of the German fleet.
His contribution to LED development, although largely unrecognised, is still important. In 1907, while working on a radiogoniometry system for maritime transport, he discovered that inorganic materials can give off light. The publication of this finding in Electrical World magazine was the basis of many future studies.