Difference between revisions of "Display"
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The first displays used [[cathode ray tube|CRTs]], but since they were [[vacuum tube]]s, they took up considerable volume. Still, they were the mainstay of visual displays up through the early days of [[bit-mapped display]]s. | The first displays used [[cathode ray tube|CRTs]], but since they were [[vacuum tube]]s, they took up considerable volume. Still, they were the mainstay of visual displays up through the early days of [[bit-mapped display]]s. | ||
| − | When it became possible to fabricate [[liquid crystal display]]s with many [[pixel]]s in large [[array]]s, they were the only viable display technology for use in lap-top [[personal computer]]s, and that drove their development. LCD displays rapidly became the display of choice once they became economically competive. | + | When it became possible to fabricate [[liquid crystal display]]s with many [[pixel]]s in large [[array]]s, for physical reasons they were the only viable display technology for use in lap-top [[personal computer]]s, and that drove their development. LCD displays rapidly became the display of choice for all display applications, once they became economically competive. |
| − | LCDs | + | LCDs need a backlight, which was generally provided by a fluorescent light driven by a high-[[voltage]] [[power supply]], both of which had a moderate tendency to fail. |
| − | Thus, when the invention of the blue [[Light Emitting Diode|LED]] permitted the creation of displays consisting of arrays of LEDs, those rapidly because the display technology of choice. | + | Thus, when the invention of the blue [[Light Emitting Diode|LED]] permitted the creation of colour displays consisting of arrays of LEDs, those rapidly because the display technology of choice. |
Revision as of 15:19, 16 September 2018
A display is a piece of hardware which can display an image to the user; the may be monochrome, although now they are almost all colour.
The first displays used CRTs, but since they were vacuum tubes, they took up considerable volume. Still, they were the mainstay of visual displays up through the early days of bit-mapped displays.
When it became possible to fabricate liquid crystal displays with many pixels in large arrays, for physical reasons they were the only viable display technology for use in lap-top personal computers, and that drove their development. LCD displays rapidly became the display of choice for all display applications, once they became economically competive.
LCDs need a backlight, which was generally provided by a fluorescent light driven by a high-voltage power supply, both of which had a moderate tendency to fail.
Thus, when the invention of the blue LED permitted the creation of colour displays consisting of arrays of LEDs, those rapidly because the display technology of choice.
