Quote:
Originally Posted by Quoth
@Fritomaster
What is colour / contrast shift like at more shallow viewing angles?
Color shifts on older LCDs are partially due to parallax error caused by glass thickness, due to mono pixels under glass and filter on top. Though LCDs have a second problem (ameliorated on newer designs) due to limited viewing angle on the polarisers. Unlike any other display (except DLP) the LCD pixels don't change in brightness or turn on/off at all. Instead the crystalline rods move due to electric field like a rotating polariser. That's why it has separate polarising layers so the light is passed or blocked by a pixel. Unlike the balls in eink cells the rods are not bistable so the LCD drive consumes power even with no backlight and a static image.
DLP pixels are nano-sized hinged mirrors. At one angle all the illuminating light (halogen, Xenon, LED, Laser) is reflected into the lens for peak white and the extreme other angle the light lands on a black coated heat sink. Colour is either by a spinning wheel with Red, Green, Blue and clear segments, or by using 3 DLP chips and dichroic combiners, with either a white light source split by dichroic prisms, or monochromatic red, green and blue LEDs/Lasers, or filtered white light.
Cameras can be single chip with a filter or three chips using dichroic blocks like DLP.
The very earliest experimental colour TV using CRTs on late 1940s & early 1950s (1924 was mechanical) used a R G B spinning wheel, or a drum. Then they figured how to do colour directly with coloured phosphor either using a shadowmask plate with holes (later wires & stripes on Trinitron) or stripes with detection of when the electrons at blue (1951, but not working economically till 1990s, beam indexing). By the time the Beam indexed colour CRT was viable the LCD was able to do colour TV.
Oldly LEDs and LCDs discovered at the start of the 20th C or end of 19th but not practical till 1960s (1962 LED, 1964 LCD).
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Not seeing any at all and I'm at as hard of an angle as you can get.
https://imgur.com/a/LgxJhqx
Also cool to hear info about crts. I happen to have a nice little collection of pvms. TM-H150CG/20M4U and a few others.