Dear Azizkhon,

Why do you want to use OLEDs if they can not output the required power. Why not using the power LEDs that outputs appreciable power at the UV wavelength provided that you remove the yellow phosphors in the path of the diode radiation.

Or you can use directly blue LEDs.

Best wishes

Dear Azizkhon Ishankhonov

The intensity of an OLED display pannel is normally set to a certain brightness driven by its electronic circuits. The brightness is typical of 1000 cd/m2 or 500 cd/m2. Although you could buy a OLED display for your research to drive using a power supply. However you mentioned that the colour doesn't matter which is impossible. The color can be considered from a spectrum with a range of wavelengths. Therefore the color is important if you consider to use different wavelength range. Furthermore, you are only interested in the wavelength of 350nm to 450nm. An OLED display has light output above 400 nm. It may not suit for your application then.

Hope it helps.

Best wishes

Xuhua

Dear Aziz khon,

welcome!

The output light of the a LED is measured either in LUMENs or in milliwatts but not in mJoules. The LED produces stream of photons which is a joule per second.

Best wishes

The wavelength you require is in the violet light range. So, you have to select a violet OLEDs. By refering to the data sheet you can get the size and the light emission intensity in either lumens/ input w or mw radiation/ watt input.

Abdelhalim abdelnaby Zekry Thank you for your answer and corrections.

Yes, It that. I need ultraviolet lights. Light with 405 wavelengths will be enough for curing commercial photopolymers.

I want to use OLEDs for curing photopolymer on 3D printing. I research the possibility of using OLED displays as a micro-stereolithographic device and light intensity and power is an important parameter that influences printing time.

Xuhua Wang Thank you for your answer,

405 nm wavelength enough for my purpose.

When I say the color does not matter I want to say that subpixels for RGB superfluous.

I need lights between 350-450 nm wavelength because commercial photopolymer for 3D printing developed for this wavelength. If OLEDs can produce 405 nm wavelength is enough for curing photopolymers.

Dear Azizkhon,

Why do you want to use OLEDs if they can not output the required power. Why not using the power LEDs that outputs appreciable power at the UV wavelength provided that you remove the yellow phosphors in the path of the diode radiation.

Or you can use directly blue LEDs.

Best wishes

Abdelhalim abdelnaby Zekry

I think about this too.

LED already using in 3D printing. Now, manufacturers use LCD display and LED light as a figure that I attach and they had some problems

1. low UV light transmission

2. UV light damage LCD display and because of that lifetime low too. Lifetime about 500-1000 hours and after that some pixels will be broken

3. LCD panels are not flexible. it is not good for the printing process because the platform sometimes can stick to the display and can brake display

I thinking about removing some layers from the LCD panel for solving these problems but I don’t know if this will help me.

If I can find OLEDs that can produce the required power then

1. display lifetime will be longer,

2. printing will be more accurate than now

3. this may provide an opportunity to develop a smaller mobile 3D printer like a laptop. Since the OLED display can function as a mask and a light emitter

If I can not find necessary OLED maybe I try to find QLED or find LCD panel that UV resistant

https://www.laserfocusworld.com/test-measurement/research/article/16565047/microoled-unveils-highestpixeldensity-oled-microdisplay