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Thread: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

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    The User DemonDragonJ's Avatar
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    Default Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    Light-emitting diodes, or LED's, have been in existence for several decades, but only recently have begun to see common usage in numerous applications in an average person's everyday life. Their most noticeable uses are in televisions, computer displays, and household illumination, all of which are used very frequently. The main advantages of LED's over the older technologies used in those areas (CRT, LCD, incandescent, and fluorescent) are that they consume less electricity, generate less heat, and have longer lifespans than do the other technologies, and, most importantly, they are semi-conductors, meaning that they are not limited to a specific form factor (as are the other technologies) and also become more efficient as time passes, an advantage that they share with solid-state drives.

    Currently, LED's still are not used as widely as the other technologies, despite their advantages, because the units are still expensive for initial purchase, but I expect that situation to change as the units become less expensive, and that LED's shall eventually replace all other technologies used for lighting or visual displays. What does everyone else say on this subject? Will LED's eventually replace incandescent and fluorescent lighting, and also LCD screens, and how long may it take for that displacement to occur?
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    Default Re: Will LED's Eventually Replace All Other Illumination and Display Technologies?

    i think leds are the wave of the future. especially with the newer ones that are bright enough to be used as headlights.

    however, there is a whole lot more work involved in making a led bulb than an incandescent (ones that are powered by ac). so the price should come down, but they probably will still cost more than other types.

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    A.B. normal msmrx57's Avatar
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    Default Re: Will LED's Eventually Replace All Other Illumination and Display Technologies?

    Another issue as far as household use is that the "temperature" is still not quite what most people want. It took a while for them to get the cfl's to produce light in the range that made people actually like them. We picked up some and while they are bright and efficient they produce a very cold bluish light. Most of our lights are cfl however my wife and I both prefer that nice warm glow of incandescents so that's what we use in the bathroom. Since the bathroom light isn't on all that much I don't feel too bad about it.
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    The User DemonDragonJ's Avatar
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    Default Re: Will LED's Eventually Replace All Other Illumination and Display Technologies?

    Quote Originally Posted by msmrx57 View Post
    Another issue as far as household use is that the "temperature" is still not quite what most people want. It took a while for them to get the cfl's to produce light in the range that made people actually like them. We picked up some and while they are bright and efficient they produce a very cold bluish light. Most of our lights are cfl however my wife and I both prefer that nice warm glow of incandescents so that's what we use in the bathroom. Since the bathroom light isn't on all that much I don't feel too bad about it.
    I cannot speak for every homeowner, but I absolutely prefer "daylight"-colored lamps in my residence, as I find that they provide far better illumination than do any "soft white" lamps. I do not understand why some people prefer "warm" light over "cool" light or why devices that provide warm light far outnumber those that provide cool light, but I will always use cool light (i.e., 5000K or greater color temperature) over warm light (i.e., 2700K to 3000K color temperature) in my own place of residence.
    "When the people fear the government, there is tyranny; when the government fears the people, there is liberty." -Thomas Jefferson.

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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    you can get led bulbs in the warm white, but the ones i have are the cool white and it makes for a neat eery effect. so i love em.

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    50 Custom PC's in 10 Years! TheGreatSatan's Avatar
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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    I'm still waiting for OLED
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    Undead Pirate d_stilgar's Avatar
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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    People generally like the glow of incandescent bulbs because they give off a much wider spectrum of light. This means that the light can reflect off of everything and show its real color instead of distorting it because the color was never in the light in the first place.

    To get this high quality light, however, it requires expensive phosphors. That expense isn't going to change anytime soon. Also, brightness has been a huge issues. LEDs don't like to be high power, so their lifetime is greatly reduced by shoving enough power to actually brighten them up to usable brightness. Still, innovation can solve that problem.

    There are some LED bulbs that do a decent job at reproducing full-spectrum light in the same temperature as incandescents. This Philips bulb in particular won some prizes for being really efficient while producing high quality light.

    The other issue with LED bulbs is that each bulb has its own power supply to convert AC to DC. This is more a legacy issue than anything. We've had AC bulbs for so long that it's just what we have. Houses aren't wired for DC, but the bulbs could get much more efficient if we planned for DC lighting in our new buildings. Nobody will, it would take a whole industry to adopt new standards, so I don't see it happening in the private sector anytime soon.

    As for displays, I see OLED being a much bigger deal.

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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    not to mention that ac is more efficient to transfer than dc. which as we all should know is why our power grid runs on tesla's ac instead of douche-bag edison's dc power.

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    Undead Pirate d_stilgar's Avatar
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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    Quote Originally Posted by xr4man View Post
    not to mention that ac is more efficient to transfer than dc. which as we all should know is why our power grid runs on tesla's ac instead of douche-bag edison's dc power.
    I don't disagree at all, but you could have a large AC to DC power supply in your house, then have DC for all your lights.

    I'm not saying all outlets be DC, but you could have DC light fixtures, or more efficient DC conversion in a lamp base than in the bulbs themselves. Something that would be ready to just take a DC bulb.

    Not to throw the discussion off track too much, but here's a slightly NSFW (language) video discussing the history of Tesla. Be warned, there are a few F-words, but it's so funny. Also, barf.


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    Default Re: Will LEDs Eventually Replace All Other Illumination and Display Technologies?

    Quote Originally Posted by d_stilgar View Post
    I don't disagree at all, but you could have a large AC to DC power supply in your house, then have DC for all your lights.

    I'm not saying all outlets be DC, but you could have DC light fixtures, or more efficient DC conversion in a lamp base than in the bulbs themselves. Something that would be ready to just take a DC bulb.
    I believe they are already doing this. I saw something on DIY or HGTV where all the light fixtures were 12V DC. They were running a combination of 12V incandescent and LED bulbs, but primarily incandescent. What I found extremely cool was how they interfaced the fixtures. All the low voltage lines when back to a central relay panel, along with all the switches. This allowed the home owner to configure any switch to control any light or group of lights. Also they talked about a control module that could interface with the system for home automation purposes. Cool stuff indeed.

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