Now, combine that wrinkle with memory chips that use next to no power and can be running all the time. And what do you have? A computer that will automatically shut off without harm if you didn’t tap a key after a certain stretch of time. Just like a calculator. So—battery makers, beware!
There are still other alternatives to CRTs. One is the electroluminescent screen—used on the Grid Compass portable—which glows and is sharper than the LCD. Electroluminescents in 1984, however, were far too expensive for the average computer buyer; the Grid was selling for $4,250, and much of that was the cost of the display. A second failing of electroluminescent screens[screens] is that they’re electricity hungry. You can’t operate them with miniature batteries.
Another LCD alternative is the plasma panel, which glows with a gas mixture consisting mainly of neon. Plasmas don’t flicker. The characters are sharp; the contrast, excellent. But backup circuitry has been expensive; and even small plasmas, with the accompanying electronics, cost several thousand dollars in 1984—a far cry from a $150 CRT monitor.
To sum up, the main advantages of flat screens are their lightness, low power consumption in most cases, safety, lack of flicker, and very likely a better view in the long run. As of late 1984 the trade-offs (at least in the case of LCDs) were:
▪ The broken-up, somewhat fuzzy letters and the low contrast between them and the background.
▪ The need to have the display at just the right angle from you to get the sharpest picture. This could get in the way if you were moving the LCD to reduce glare.
▪ The comparatively slow speed with which letters or numbers appeared on an LCD after you’ve typed.
▪ The general lack of full-sized 24-line screens with 80 columns. The Data General portable debuted with 24 lines and a screen measuring 11 inches diagonally—a welcome exception, even if the quality of the characters still wasn’t good enough for heavy use.
Since many flat screens were on portables, there were other ergonomic problems not related to the display technology per se. In late 1984, most flat-screen portables lacked detachable keyboards. But the limitations of LCDs were the main problems.
A reporter friend, banging out stories for his paper at times in the field, told me he’s survived the 40-column, 8-line screen of the Radio Shack Model 100 very well. But I’m not surprised. He’s also brooked that clunky Select software, which gets in the way of corrections and insertions. Gene, you see, apparently knows what he’s going to write—he needn’t watch the screen as much. I wish I were as decisive. At any rate, what was right for Gene wouldn’t necessarily be right for a clerk who’ll be at the keyboard seven or eight hours a day.