CRTnäytöissä

CRTnäytöissä, which translates to "in CRT displays" or "CRT monitors," refers to the technology used in Cathode Ray Tube displays. These were the dominant display technology for televisions and computer monitors from the mid-20th century until the early 21st century. A CRT display works by firing a beam of electrons from an electron gun at the back of the tube. This beam is then scanned across the screen by magnetic fields, striking a phosphorescent coating on the inside of the screen. The impact of the electrons causes the phosphors to emit light, forming the image that is seen by the viewer. Different colored phosphors (red, green, and blue) are arranged in small dots or stripes, and by controlling the intensity of the electron beams hitting each color, a wide spectrum of colors can be produced. The characteristic shape of CRT displays, being deep and bulky, is a direct result of the electron gun and the necessary vacuum within the glass tube. While they offered excellent color reproduction and fast response times, their size, weight, and power consumption led to their eventual replacement by thinner and more energy-efficient technologies such as LCD and OLED.