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Outdoor sun-light readable signage. A comparable high-brightness 1080p display is about the same price [1], but uses a lot more electricity and from my experie

Outdoor sun-light readable signage. A comparable high-brightness 1080p display is about the same price [1], but uses a lot more electricity and from my experience with them, they have definite lifespan (2-4yrs, despite the 100k hours light lifetime claim) if they're running 24/7. [1] https://www.compsource.com/buy/DS322LR41/Dynascan-4769 https://www.compsource.com/buy/DS322LR41/Dynascan-4769

Shivetya 6y ago
Well McD uses Samsung's OHF series screens and I have yet to see sunlight diminish them. I expect other restaurants to adopt them or similar. Pretty much eating 200+ watts an hour in typical use for a 55 inch screen https://displaysolutions.samsung.com/digital-signage/detail/1050/OH55F https://displaysolutions.samsung.com/digital-signage/detail/...
- quercetumMons 6y ago
  I don't want to come off as a pedant, but "watts an hour" doesn't make sense in this context. Watts are a unit of power, energy per time. Joules are a unit of energy. One watt is precisely one joule per second. "Watts [per] hour" would be a change in power per time which is equivalent to an acceleration of energy and not an amount of energy. To get an amount of energy, you multiply the power (watts) by an amount of time. If you want the energy in units of joules, you multiple the watts by the number of seconds in which the power was consumed. That's why kilowatt-hour a is a unit of energy; it's equivalent to one watt applied for one hour. One hour is 3600 seconds, so one kilowatt-hour is equal to 3600 kilojoules. I believe you meant that the screens consume 200+ watts.
  - knob 6y ago
    I actually enjoyed the clarification. Thanks for posting.
dvirsky 6y ago
What's the lifespan of an e-ink display?
- input_sh 6y ago
  E-ink only actively uses power while it's changing the content on the screen. Assuming you want a static image, e-ink can outlast that easily while using virtually no power. Mine lasts for five years now even though it's "on" the entire time (because even when it's locked, it displays a wallpaper).
  - dandelany 6y ago
    Power isn’t the main issue I’d be concerned about re: “lifespan” for signage. I wonder more about how it handles long-term UV exposure, day-night temperature cycles, changing humidity, etc.

Shivetya 6y ago

Well McD uses Samsung's OHF series screens and I have yet to see sunlight diminish them. I expect other restaurants to adopt them or similar. Pretty much eating 200+ watts an hour in typical use for a 55 inch screen https://displaysolutions.samsung.com/digital-signage/detail/1050/OH55F https://displaysolutions.samsung.com/digital-signage/detail/...

quercetumMons 6y ago
I don't want to come off as a pedant, but "watts an hour" doesn't make sense in this context. Watts are a unit of power, energy per time. Joules are a unit of energy. One watt is precisely one joule per second. "Watts [per] hour" would be a change in power per time which is equivalent to an acceleration of energy and not an amount of energy. To get an amount of energy, you multiply the power (watts) by an amount of time. If you want the energy in units of joules, you multiple the watts by the number of seconds in which the power was consumed. That's why kilowatt-hour a is a unit of energy; it's equivalent to one watt applied for one hour. One hour is 3600 seconds, so one kilowatt-hour is equal to 3600 kilojoules. I believe you meant that the screens consume 200+ watts.
- knob 6y ago
  I actually enjoyed the clarification. Thanks for posting.

dvirsky 6y ago

What's the lifespan of an e-ink display?

input_sh 6y ago
E-ink only actively uses power while it's changing the content on the screen. Assuming you want a static image, e-ink can outlast that easily while using virtually no power. Mine lasts for five years now even though it's "on" the entire time (because even when it's locked, it displays a wallpaper).
- dandelany 6y ago
  Power isn’t the main issue I’d be concerned about re: “lifespan” for signage. I wonder more about how it handles long-term UV exposure, day-night temperature cycles, changing humidity, etc.