In p>192, Hewitt of America invented the mercury lamp.
in p>19l, French scientists noticed an experiment conducted by Moore in 1895. In this experiment, Moore filled a small amount of carbon dioxide into a glass tube that had been evacuated from air, and then gave it a high voltage to discharge it. As a result, the tube gave off white light.
According to Moore's experiment, Kraut filled neon, argon, helium and other inert gases into the evacuated glass tube. He found that when neon is filled, the lamp tube will emit red-orange light; When the mixture of neon and argon is filled, the lamp tube will emit blue light; When the mixture of neon and mercury is filled, the lamp tube will emit green light; When helium is filled, the lamp tube will emit golden light. If different fluorescent substances are coated on the inner wall of the tube, the color of the light will be richer. Croft obtained a patent for the invention of neon lamp.
In p>1938, Iman, a researcher of General Electronics Company of the United States, made a fluorescent lamp with completely different performance from mercury lamp. Because the composition of fluorescence is similar to sunlight, people also call it "fluorescent day"
in p>1962, holonico made the world's first light emitting diode (LED). In 1963, he also invented the world's first red-emitting semiconductor laser. At present, this kind of laser diode is the key component of CD, DVD, player, laser printer and copier.
in p>1879, the American inventor Edison invented the incandescent lamp, and human beings began to enter the lighting era of electric light sources. With the progress of science and technology, electric light sources have been developing continuously: low-pressure sodium lamp, fluorescent lamp and high-pressure mercury lamp were invented in 1931, tungsten halogen lamp in 1959, metal halide lamp in 1964, high-pressure sodium lamp in 1965, tricolor fluorescent lamp in 1973, compact fluorescent lamp in 198 and high-frequency electrodeless lamp in 1991. Electric light source is the main part of lighting system, which has developed greatly in the past 123 years. At present, its varieties have exceeded 3, and its specifications have reached more than 5,. The birth of high-quality electric light source products with various specifications has created good conditions for mankind to enter the light culture era of green lighting.
in p>1931, GE invented the earliest high-intensity gas discharge lamp-high-pressure mercury lamp. Subsequently, GE invented the high-pressure sodium lamp in 1962 and the metal halide lamp in 1964.
In the early 19th century, H. David of Britain invented the carbon arc lamp
Philips, the inventor of the p>1978 energy-saving lamp.
In p>1792, the inventor of gas lamp was William Murdoch of England.
In p>1745, people made kerosene lamps.
The inventor of yellow signal lamp was Hu Ruding of China.
Suiren invented drilling for fire.
Oil lamps originated from the discovery of fire and the need of human lighting. According to archaeological data, as early as about 7,-2, years ago, Peking Man in Paleolithic Age began to use fire in his life, and at the latest, shaped lamps appeared in the Spring and Autumn Period. In historical records, lamps were found in the legendary Yellow Emperor period, and there were also official positions specializing in taking fire or lighting in Zhou Li. In terms of the fuel used, lamps in China are divided into paste lamps and candle lamps, that is, oil lamps and candlesticks as mentioned in later generations; In terms of function, it can be divided into practical lamps (for lighting) and ceremonial lamps (for religious ceremonies); As far as the form is concerned, there are seat lamps (desk lamps, wall lamps and table wall lamps), walking lamps and seat and row lamps. China oil lamp is closely related to China's technological civilization and plastic arts, reflecting the progress of science and technology and aesthetic fashion. In order to eliminate smoke and dust, the bronze lamps of Han dynasty were equipped with smoke guide pipes; In order to save fuel, the Song Dynasty invented a porcelain lamp (oil lamp saving); In order to prevent mice from stealing lamp oil, a built-in lamp was designed in the Yuan Dynasty (irritating cats). In order to be convenient and practical, the table wall dual-purpose lamp was manufactured by using the mechanical principle in Ming and Qing Dynasties. In the aesthetic field, the figure-shaped lamps in the Warring States period and the animal-shaped lamps in the Han Dynasty introduced certain shapes into the design of lamps, which added cultural connotations. During the Ming and Qing Dynasties, blue-and-white and pastel porcelain lamps appeared, and painting was introduced into the decoration of lamps, which was very characteristic of the times.