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geekhack Community => Off Topic => Topic started by: Olumin on Fri, 19 October 2018, 14:12:58

Title: LED Displays: Old vs New
Post by: Olumin on Fri, 19 October 2018, 14:12:58
What is the difference and why do the old ones look so much better?
Brighter, sharper, more colourful... Old LED displays on calculators, clocks, watches etc. just look so much better..

..in general anyway. Im sure there are exceptions...

Is it just down to less efficient devices and therefore higher powered LED's resulting in higher brightness?

EXAMPLE: OLD LED display:

(http://www.old-computers.com/museum/photos/rockwell_aim65_display_zoom.jpg)

(http://lnet.pro/wp-content/uploads/2018/05/alarm-clock-for-sale-vintage-pink-alarm-ck-electric-pink-bedroom-alarm-clock-sale-online.jpg)

And new NEW LED displays:

(https://www.maxiaids.com/Media/Thumbs/0001/0001235-digital-alarm-clock-with-18-inch-jumbo-led.jpg)

(https://www.picclickimg.com/d/l400/pict/163170934603_/Digitaler-Wecker-PICTEK-Digitaluhr-alarm-clock-5LED-Display-Randlos.jpg)

...
(https://media.giphy.com/media/eauCbbW6MvqKI/giphy.gif)


Title: Re: LED Displays: Old vs New
Post by: tp4tissue on Fri, 19 October 2018, 15:28:29
Tp4 prefers VFD . !!

[attachimg=1]
Title: Re: LED Displays: Old vs New
Post by: Olumin on Fri, 19 October 2018, 15:39:23
Tp4 prefers VFD . !!

(Attachment Link)

Yes! Me too.

I have a calculator like that one somewhere. Privileg brand I think.
Title: Re: LED Displays: Old vs New
Post by: rowdy on Sun, 21 October 2018, 20:49:28
Maybe running at 3.3V instead of 5V (or higher)?
Title: Re: LED Displays: Old vs New
Post by: invariance on Mon, 22 October 2018, 01:22:26
Put a vfd on a build to display what layer your on


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Title: Re: LED Displays: Old vs New
Post by: suicidal_orange on Mon, 22 October 2018, 06:33:12
Could it have something to do with the old covers being thicker and not crystal clear so adding a bit of fuzziness?  The modern ones all have gaps in the corners which just looks bad.
Title: Re: LED Displays: Old vs New
Post by: tp4tissue on Mon, 22 October 2018, 09:45:53
Could it have something to do with the old covers being thicker and not crystal clear so adding a bit of fuzziness?  The modern ones all have gaps in the corners which just looks bad.

Modern ones are LED backlit LCDs.. The big numbers are big LCDs with tiny LED backlit.   This works fine for smaller displays because the led is the size of the lcd. but big ones look lackluster.

No one is using VFDs anymore.