At one time, Apple Computer, Dell, Digital Equipment Company, Sun Microsystems Company and other companies also sold displays using Terilon cathode picture tubes. In the market, the display with Terilon label has become synonymous with Sony display.
Sony developed Trinitron technology in 1968. It was designed for television. In the1980s, it was applied to computers and integrated into CRT monitors. Its working principle: instead of aggregating phosphor dots into triangles, phosphors are arranged in uninterrupted lines according to color classification. The light travels in a straight line along the left, right, up and down curves. The shadow mask here is replaced by another mask with vertical stripes instead of small holes, just like uninterrupted phosphor. However, the opaque part of the strip matrix prevents the electron beam from passing through, which takes up less space than the previous technology and makes the graphics clearer and brighter.
The only trouble is that this kind of mask is made up of thousands of very thin threads and must be firmly fixed. So there will be two horizontal damping lines extending to the whole picture, in order to absorb the vibration and the expansion of the material when it is heated to a certain extent. This will produce two visible gray thin lines on the screen with a bright background. This will annoy some users, especially if they work in a white background. But the naked eye will get used to it after a while, and then it is not easy to find those lines. Also note that the lines you can see will change with the size of the screen, especially the size of the mask. There will only be one line on a screen smaller than 17 inch, while there will be two lines on a larger screen. The main advantages of Trinitron technology are: reducing heat dissipation; Brighter and better contrast under the same power consumption; A completely flat screen.
Only two manufacturers use Trinitron technology on picture tubes-Sony's FD Trinitron technology and Mitsubishi's DiamondTron technology. The PerfectFlat technology of Youpai is an improved version of the latter. The main difference between these two technologies is that Mitsubishi uses three electron guns to process RGB primary colors, while Sony only uses one. In all practical cases, different technologies are collectively referred to as Aperture Grill, and Trinitron, owned by Bisogni, is less known but more common.