UNDERSTUDY OF THE LATEST TECHNOLOGY IN L.E.D VISUAL DISPLAY
UNDERSTUDY OF THE LATEST TECHNOLOGY IN L.E.D VISUAL DISPLAY CHAPTER ONE 1. INTRODUCTION L.E.D which is known as Light Emitting Diode was discovered More than 100 years ago in 1907, an Englishman named Henry Joseph Round discovered that inorganic materials could light up when an electric current flowed through it. 1.1 Background of the study The first light-emitting diode (LED) had now been born. At that time, the material properties were poorly controlled, and the emission process was not well understood. The light-emitting active material was SiC crystallites as used for sandpaper abrasive. In the next decades, Russian physicist Oleg Lossew and French physicist Georges Destriau studied this phenomenon in great detail and the term ‘electro-luminescence’ was invented to describe this. In 1962, inorganic materials (Gasp) emitting red light were first demonstra...