Buying a television screen (II)
For Digital Future | March 17, 2008
Regardless of the technology chosen, the TV flat always contains a multitude of elementary points called pixels. Their number determines the resolution of the screen. Each pixel contains three subpixeles, red, green and blue, whose intensity is balanced to get the desired hue. The problem for builders is to find a technology to fix these three basic colors on the screen.
As for the LCD, the principle is fairly simple. The LCD does not emit any light. It is for this that the liquid crystal displays with retro lighting. Instead the glass has the advantage of behaving like a light switch when it is subjected to an electric voltage. Playing on the control voltage, we can close more or less this switch on the light, thus changing its intensity. As well as retro lighting of the light is white, placed three switches and just three per pixel color filters: red, green and blue. The color can then be dosed at will as it is sought. There are many variants of LCD technology, but all of them are based on the same basic principle. The plasma display uses tiny fluorescent lights red, green and blue to fix the images. These small "neon colored light more or less to perform the dosage of color.
More than the various technical options, are primarily the advantages of both technologies that matters. The victory was the first LCD enable the manufacture of flat screens of small size with a good resolution. We can therefore easily find LCD TV from 36 cm diagonal while plasma is the first to 94 cm diagonal.
Unlike plasma, LCD no flashes, because we can easily put us very near the surface of the screen, provided they have opted for a moderate luminosity. Under these conditions, the LCD is particularly suitable for players of consoles, which are located closest to the screens. We should also bear in mind that the plasma is very sensitive to static images long time, marking the screen or commonly said burning the screen. Therefore, plasma TVs should not be used to monitor always the same channel that has a large area of still images as logos, text banners, or for use with a PC screen playing a long time.
Topics: TV |
- Buying a television screen (III)
- The contrast to buy a TV
- Buying a television screen (I)
- OLED screens to replace LCD and Plasma
- The plasma screens during the same as the LCD
