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Black display LCD clock

Black display LCD clock

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These displays that have a typical grey background with black numerical displays are everywhere in car parking clocks, alarm clocks, smart meters, watches and even car radio displays too. Here are the advantages and disadvantages of these IMO

Advantages:
Cheap to produce
Energy efficient

Disadvantages:
Can be difficult to read without LED backlighting assistance in the dark
Terrible for reading in the distance as to me the 0 can appear as eight or you could mistake 7 for 1.

so its a 50 50 when it comes to ad/dis

IMG_1890.JPG IMG_2363.JPG IMG_2129.JPG IMG_2305.JPG

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Filename:IMG_2129.JPG
Album name:Flurofan96 / LED, Electroluminescent, Neon, lasers + misc
Keywords:Miscellaneous
File Size:490 KB
Date added:Apr 21, 2017
Dimensions:2465 x 1643 pixels
Displayed:60 times
Date Time:2017:04:15 21:07:32
DateTime Original:2017:04:15 21:07:32
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FNumber:f 7.1
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Focal length:53 mm
ISO:4294902160
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Model:Canon EOS 350D DIGITAL
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dor123
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Apr 21, 2017 at 05:53 AM Author: dor123
The problem with terrible reading from distance, I've mainly with the electronic displays on the buses and the Metronit BRT. These uses lime green LCD displays on a black surface, which is often dim and hard to see during the day, and with segemented displays there, I've often see 7 as 1.
With clocks, I've no problems to read LCD displays. I usually avoid LED clocks, despite the segements lights by themselves, as it is consume more from the batteries. The backlight in my alarm clocks, are used mainly during sleeping to read the time.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I'm antiLED and hope that the LED lighting will be phased out in favor of old lighting technologies soon.

Medved
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Apr 21, 2017 at 08:44 AM Author: Medved
When it comes to the readability at strong light (direct sunlight,...), there are only two viable methods: These passive LCD's and flip element concept (a small plates, black on one side and yellow/green on the other, flipped by an electromechanic mechanism; used in older public transport information systems) are the only viable concepts I've seen.
Unfortunately the electromechanical types are very expensive to make, so once the LED's become brighter, they were replaced by LED only ones, and there even the bright LED's are no match against direct sunlight - so the good visibility is gone...
The passive LCD's could not be made in large enough formats (mainly due to poor mechanical and thermal robustness,...).

No more selfballasted c***

dor123
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Apr 21, 2017 at 09:47 AM Author: dor123
The buses of Nateev Express, Superbus and Nazareth Tours, have high brightness amber LED displays for the bus line information, which is much more visible than some Egged old buses having flip element mechanical displays (Which were totally crap and almost invisible during the day, even from closeup).

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I'm antiLED and hope that the LED lighting will be phased out in favor of old lighting technologies soon.

merc
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Adam


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Apr 21, 2017 at 12:36 PM Author: merc
The LED illumination of these displays isn't the only option today.
Check out my temporary watch with Electroluminescence Panel backlight.
In the Off-Topic section.

Not a misoLEDist...

dor123
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Apr 21, 2017 at 12:48 PM Author: dor123
I've an old Casio W-727H watch, as a spare, that uses EL panel backlight. Also, my alarm clock at my father home, uses EL panel backlight.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I'm antiLED and hope that the LED lighting will be phased out in favor of old lighting technologies soon.

Ash
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Apr 21, 2017 at 01:25 PM Author: Ash
I dont wear a watch, but when i was 8 or so i got a watch for birthday, that had an EL backlight

Now there is one particular thing i remember from that : When i got it, the first button i pressed was the light button. The backlight illuminated at once with the even Cyan-ish color of EL. But the backlight stayed ON for quite a while without touching the button. Then a White spot appeared somewhere in the center and started to grow - I thought the thing starts to overheat and burn up...

The spot grew into a shape of a fish (definitely intentional shaped like that, also the watch itself was with water related design theme), and that is how it stayed ever since

So the shape was somehow imprinted into the panel, in such a way that it gets to its final visible form only after a burn in by the user



Egged have to learn to clean their busses once in a while. Otherwise neither the flip chip thing and not anything else won't be visible..... Maybe they are better nowadays, but some 10 years ago they would often not care
merc
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Apr 21, 2017 at 01:33 PM Author: merc

The spot grew into a shape of a fish (definitely intentional shaped like that, also the watch itself was with water related design theme), and that is how it stayed ever since

Interesting. Didn't know EL panels could do that.

Not a misoLEDist...

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