OLED room lighting, 1200 lumens
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kongfuchicken
Flashlight Enthusiast
I've heard about those;
they were invented by some kodak phd and are supposed to revolutionize flat panel screens, making them cheaper, brighter and bendable...
It also seems they were having trouble making blue cells but these will eventually replace lcd screens.
they were invented by some kodak phd and are supposed to revolutionize flat panel screens, making them cheaper, brighter and bendable...
It also seems they were having trouble making blue cells but these will eventually replace lcd screens.
bricksie
Newly Enlightened
I believe Kodak has a digital camera that has an OLED display (as opposed to the standard lcd) that is significantly brighter and more detailed than current LCDs (also more efficient). However I understand that this technology is short-lived compared to LCD or standard LEDs - max of about 7 years before the OLED begins to decay.
PhotonWrangler
Flashaholic
[ QUOTE ]
bricksie said:
I believe Kodak has a digital camera that has an OLED display (as opposed to the standard lcd) that is significantly brighter and more detailed than current LCDs (also more efficient). However I understand that this technology is short-lived compared to LCD or standard LEDs - max of about 7 years before the OLED begins to decay.
[/ QUOTE ]
Correct on both counts. It's one of the Kodak EasyShare cameras. It was introduced in Europe, but I don't know if it's been brought to the U.S.
There is an issue with lifetime, particularly with the blue emitters, I believe, and the whole thing is really sensitive to moisture ingress, which can destroy it. But they are making steady progress.
bricksie said:
I believe Kodak has a digital camera that has an OLED display (as opposed to the standard lcd) that is significantly brighter and more detailed than current LCDs (also more efficient). However I understand that this technology is short-lived compared to LCD or standard LEDs - max of about 7 years before the OLED begins to decay.
[/ QUOTE ]
Correct on both counts. It's one of the Kodak EasyShare cameras. It was introduced in Europe, but I don't know if it's been brought to the U.S.
There is an issue with lifetime, particularly with the blue emitters, I believe, and the whole thing is really sensitive to moisture ingress, which can destroy it. But they are making steady progress.
gwbaltzell
Enlightened
And I have a Norelco (Philips) razor that has an OLED display, LiIon battery, and though I am a flashaholic, I bought it because it can be rinsed under the faucet. My understanding of the main problem with OLED's is their very short life.
Now, does anyone want a beamshot? /ubbthreads/images/graemlins/grin.gif
BTW the readability and window wrap problem can be fixed by changing
<font class="small">Code:</font><hr /><pre>http://someplace.com/some_very_long_thing
to
shorter words</pre><hr />
PS I think this was moved more for the wrap problem than the topic!
Now, does anyone want a beamshot? /ubbthreads/images/graemlins/grin.gif
BTW the readability and window wrap problem can be fixed by changing
<font class="small">Code:</font><hr /><pre>http://someplace.com/some_very_long_thing
to
shorter words</pre><hr />
PS I think this was moved more for the wrap problem than the topic!
PhotonWrangler
Flashaholic
[ QUOTE ]
gwbaltzell said:
And I have a Norelco (Philips) razor that has an OLED display, LiIon battery, and though I am a flashaholic, I bought it because it can be rinsed under the faucet.
[/ QUOTE ]
Yeah, I've read about that one. It's a monochrome status display, right? Can you determine if the display is built on a flexible substrate?
gwbaltzell said:
And I have a Norelco (Philips) razor that has an OLED display, LiIon battery, and though I am a flashaholic, I bought it because it can be rinsed under the faucet.
[/ QUOTE ]
Yeah, I've read about that one. It's a monochrome status display, right? Can you determine if the display is built on a flexible substrate?
gwbaltzell
Enlightened
Thanks for shortening the link. Judging by this article and what I've read, OLEDs scale up easier in output than semiconductor based LEDs, but 100hrs is an awfully short life unless they can make them really cheap!
gwbaltzell
Enlightened
The razor display is a yellow-green (to me), has a mirror-like surface behind it (I think to increase brightness), and I can't percieved any depth to it, unlike a LCD display. Given the apparent thiness I suspect its flexible. Shows remaining battery time when on or charging, charging indication, time used and if its time to rinse (every 7 uses) for a short time after being turned off.
PhotonWrangler
Flashaholic
[ QUOTE ]
gwbaltzell said:
Thanks for shortening the link. Judging by this article and what I've read, OLEDs scale up easier in output than semiconductor based LEDs, but 100hrs is an awfully short life unless they can make them really cheap!
[/ QUOTE ]
Just looked at the rating on a regular 100-watt household bulb - 1125 hours.
I wonder if the lifetime depends on how bright they're operated at, like EL lamps. Electroluminescent panels seem to have a lifetime that's affected tremendously by how bright they're run (which depends partly upon the frequency that they're operated at).
I also wonder whether heat is a factor in OLED aging. /ubbthreads/images/graemlins/thinking.gif
gwbaltzell said:
Thanks for shortening the link. Judging by this article and what I've read, OLEDs scale up easier in output than semiconductor based LEDs, but 100hrs is an awfully short life unless they can make them really cheap!
[/ QUOTE ]
Just looked at the rating on a regular 100-watt household bulb - 1125 hours.
I wonder if the lifetime depends on how bright they're operated at, like EL lamps. Electroluminescent panels seem to have a lifetime that's affected tremendously by how bright they're run (which depends partly upon the frequency that they're operated at).
I also wonder whether heat is a factor in OLED aging. /ubbthreads/images/graemlins/thinking.gif
gwbaltzell
Enlightened
Haven't seen any specifics but heat must play a factor since they are Organic.
Also never found a good reference on EL aging factors other than moisture. I think varying the frequency might extend the life of an EL panel and, if true, may speak to a factor on efficiency also.
Also never found a good reference on EL aging factors other than moisture. I think varying the frequency might extend the life of an EL panel and, if true, may speak to a factor on efficiency also.
PhotonWrangler
Flashaholic
[ QUOTE ]
gwbaltzell said:
Also never found a good reference on EL aging factors other than moisture. I think varying the frequency might extend the life of an EL panel and, if true, may speak to a factor on efficiency also.
[/ QUOTE ]
The instructions that came with one of my EL experimenter's kits states that the hlamp will be much brighter when running in the low khz range, rather than 60hz mains frequency. I've verified this on the bench.
But it also states that the lamp will age much faster when operated at a higher frequency.
gwbaltzell said:
Also never found a good reference on EL aging factors other than moisture. I think varying the frequency might extend the life of an EL panel and, if true, may speak to a factor on efficiency also.
[/ QUOTE ]
The instructions that came with one of my EL experimenter's kits states that the hlamp will be much brighter when running in the low khz range, rather than 60hz mains frequency. I've verified this on the bench.
But it also states that the lamp will age much faster when operated at a higher frequency.
PhotonWrangler
Flashaholic
[ QUOTE ]
gwbaltzell said:
The razor display is a yellow-green (to me), has a mirror-like surface behind it (I think to increase brightness), and I can't percieved any depth to it, unlike and LCD display. Given the apparent thiness I suspect its flexable. Shows remaining battery time when on or charging, charging indication, time used and if its time to rinse (every 7 uses) for a short time after being turned off.
[/ QUOTE ]
So it's not just a segmented bar graph, it actually displays text? Cool. /ubbthreads/images/graemlins/huh.gif
gwbaltzell said:
The razor display is a yellow-green (to me), has a mirror-like surface behind it (I think to increase brightness), and I can't percieved any depth to it, unlike and LCD display. Given the apparent thiness I suspect its flexable. Shows remaining battery time when on or charging, charging indication, time used and if its time to rinse (every 7 uses) for a short time after being turned off.
[/ QUOTE ]
So it's not just a segmented bar graph, it actually displays text? Cool. /ubbthreads/images/graemlins/huh.gif
gwbaltzell
Enlightened
The older model razor has an LCD display with battery level as a bar graph and time remaining, simple clean reminder, thorough clean reminder, and charging indicator. Both also beep for cleaning and when recharging is needed. The most interesting feature, to me, on the old model is the small switch which is a small bar that you think you are simply moving up and down, In reality you are pressing down on the clear insert, which doubles as a window to show the "on" LED, to unlock the switch. Elegant!
On the subject of EL panels, age alone does not seem to be a factor. A few years ago I put two 30yr old switch plates into service. An older nightlight panel I have that was used until it it grew too dim will still light up nicely at 1000Hz.
On the subject of EL panels, age alone does not seem to be a factor. A few years ago I put two 30yr old switch plates into service. An older nightlight panel I have that was used until it it grew too dim will still light up nicely at 1000Hz.
NewBie
*Retired*
Here is a full color OLED display. The Toshiba ones looked lots better than the kodak and samsung ones I saw at last years show:
gwbaltzell
Enlightened
My understanding is the construction more closely resembles LCD which is why they are easier to build and scale up. The mechanism by which they generate light is like LEDs, that whole quantum state thing.
kongfuchicken
Flashlight Enthusiast
I've heard that these will be way easier and cheaper to produce than lcd screens because they do not require extreme temperatures like lcds... That will also allow to use flexible bases that the temperature lcd requires would destroy. The fabrication of oleds will also be way simpler; they can be somply "printed" like with a ink jet printer on the support. However, I highly doubt that oled screens will be cheaper than lcd screens when commercialized; despite the substantially lower cost of manufacturing, companies are likely to boast higher performance, contrast and luminosity to justify their price.
gwbaltzell
Enlightened
I propably should had said more like old passive LCDs, most computer and TV LCD screens are active with transistors as part of the screen. The basic OLED is a layer of support, a conductor, the organic material, a layer suppling quantum holes (the Kodak improvement), a tranparent conductor, clear protective layer.
