New High Voltage Bipolar Transistor Technology from STMicroelectronics Aids CRT Revival
STMicroelectronics (NYSE: STM), one of the world’s leading semiconductor manufacturers, has introduced a new family of high-voltage power bipolar transistors, the HD1 family, that is specifically designed to meet the challenging requirements for horizontal deflection in new high-definition and ‘Super-Slim’ CRT (Cathode Ray Tube) displays.
Although traditional CRT displays have lost ground in recent years to flat-screen displays based on LCD (Liquid Crystal Display) or PDP (Plasma Display Panel) technologies that take up significantly less space on the desk or in the living room, CRT technology continues to offer better display quality and lower costs. The CRT display is making a fight back with a new breed of so-called ‘Super-Slim’ CRT displays in which the depth of the display is reduced by typically 30%, resulting in a footprint comparable to that of LCD displays.
Because these new displays employ pictures tubes of significantly reduced depth, the angle through which the electron beam must be deflected during each horizontal scan is increased from 110o to typically 124o, which places stringent new demands on the bipolar power transistors that control the flow of current through the horizontal deflection coils.
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