I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.
But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
Didn’t the boars at airports use a similar tech?
sibeen said:
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
Didn’t the boars at airports use a similar tech?
add a d.
sibeen said:
sibeen said:
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
Didn’t the boars at airports use a similar tech?
add a d.
I have seen boards at airports using such displays yes.
dv said:
sibeen said:
sibeen said:Didn’t the boars at airports use a similar tech?
add a d.
I have seen boards at airports using such displays yes.
I should have been specific. I think the old mechanical boards used the same type display.
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
I’ve seen them in vacuum tubes, based on incandescent bulb technology, I guess.
Rule 303 said:
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
I’ve seen them in vacuum tubes, based on incandescent bulb technology, I guess.
Nixie tubes.
sibeen said:
Rule 303 said:
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
I’ve seen them in vacuum tubes, based on incandescent bulb technology, I guess.
Nixie tubes.
Yep. That’s them.
sibeen said:
Rule 303 said:
dv said:
I had assumed that 7-segment displays originated with the VFD or LED displays of the 1960s.But according to Wikipedia, the first patent dates from 1903, and there was practical industrial use from 1910.
I’ve seen them in vacuum tubes, based on incandescent bulb technology, I guess.
Nixie tubes.
News to me :-) Not usually seven segment though.
I also hadn’t realised that the seven segment is hexadecimal.
Rule 303 said:
sibeen said:
Rule 303 said:I’ve seen them in vacuum tubes, based on incandescent bulb technology, I guess.
Nixie tubes.
Yep. That’s them.
They’re cold cathode rather than incandescent, and not a 7 segment display.
Back when I first saw the 7-segmnenbt display I wondered how many segments would be needed for all the letters. Letters such as x and k and w. I never figured out a good system of segments for them. So what to pocket calculators with alphabetic display use?
mollwollfumble said:
Back when I first saw the 7-segmnenbt display I wondered how many segments would be needed for all the letters. Letters such as x and k and w. I never figured out a good system of segments for them. So what to pocket calculators with alphabetic display use?
Industrial equipment use 16 segment LCD displays when alphanumeric characters are needed.
Dark Orange said:
mollwollfumble said:
Back when I first saw the 7-segmnenbt display I wondered how many segments would be needed for all the letters. Letters such as x and k and w. I never figured out a good system of segments for them. So what to pocket calculators with alphabetic display use?
Industrial equipment use 16 segment LCD displays when alphanumeric characters are needed.
Thanks. Seems a bit excessive, but who cares. It’ll work.