AS01a-21 QRLEDs for the LCD backlights

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CHONG, Wan Ho(@whchongab)
January 19, 2022 4:38 pm

Appreciate on what you have done so far in this interesting topic and I have the following questions:

1. To what extent will QRLED increases the LCD efficiency compared to the modern one. Are there any drawbacks?
2. Will the material changes affect the viewing angle of the monitor?
3. Do you think QRLED will be a popular trend in the future for monitors?

Thanks.

Last edited 10 months ago by CHONG, Wan Ho
YEUNG, Chun Kit(@ckyeungaj)
January 19, 2022 5:06 pm
Reply to  CHONG, Wan Ho

Wow! The third question is interesting. I am just a passerby but I deem it will be popular as it enhances the color gamut and the stability of each LED chip. People always have exact demands on entertainment.

PUI, Chi Wing(@cwpui)
January 19, 2022 5:14 pm
Reply to  CHONG, Wan Ho

Thank you for your comment.
1. QRLED can improve the energy efficiency to 6-8% where the modern displays are limited in the range of 3-5%
2. No, since only OLED will have this problem.
3. Yes, since the world is trend to smart city. More technology is need and the demand of QRLED will be more.

PUROHIT, Anushka(@apurohit)
January 19, 2022 4:01 pm

Great job! Would love for you to take a look at my poster as well – “Winko Box”!

PUI, Chi Wing(@cwpui)
January 19, 2022 4:28 pm

Sure

LI, Chun Ming(@cmliag)
January 19, 2022 2:50 pm

Great work in the poster design and the descriptions in each sub-heading! Could we see the prototype soon? Hope to be amazed by this LCD panel powered by QRLED backlight!!
By the way, would you mind checking out our poster and sharing your opinions?

WONG, Man Yi Manny(@mymwong)
January 19, 2022 2:56 pm
Reply to  LI, Chun Ming

Thank you for your comments. We are now still working on the prototype, we hope that we can finish it as soon as possible.

QUADEER, Ahmed Abdul(@eeaaquadeer)
January 19, 2022 2:41 pm

This is an interesting project. I have a few questions:

  1. You mention that you would like develop a technology with higher LCD efficiency. Can you explain what you mean by LCD efficiency? Also, how is the “temperature stability” related to LCD efficiency?
  2. Can you elaborate what you mean by “dropping” the QRs on the LED?
PUI, Chi Wing(@cwpui)
January 19, 2022 3:08 pm

Thank you for your comment. The higher LCD efficiency means that the light passing through the polarizers will get the less optical losses. Also, QR have the better temperature stability than QD. Therefore, the light-out coupling of QR will be more to output. The meaning of “dropping” is emit the liquid(QRs) on the top of the blue LED.

YEUNG, Chun Kit(@ckyeungaj)
January 19, 2022 2:39 pm

Which UV resin are you using on the LED chips?

CHAN, Shu Hei(@shchanaq)
January 19, 2022 2:44 pm

The UV resin we are using is norland optical adhesive 61(“NOA 61“)

YEUNG, Chun Kit(@ckyeungaj)
January 19, 2022 3:04 pm
Reply to  CHAN, Shu Hei

This is good but will you mix NOA61 with other coating materials to increase the density for slowing down the impact of water vapor and oxygen to the LED chips?

CHAN, Shu Hei(@shchanaq)
January 19, 2022 3:13 pm

Sure. We will mix NOA61 with other coating materials.

PUI, Chi Wing(@cwpui)
January 19, 2022 3:14 pm

Yes, we will use the acrylic box to test our QRLED in different environment later.

Last edited 10 months ago by PUI, Chi Wing
FAN, Zhiyong(@eezfan)
January 19, 2022 1:19 pm

Overall the poster looks good. But I found references are missing. Also it can be further improved by reducing amount of text and adding in more graphics/data.

PUI, Chi Wing(@cwpui)
January 19, 2022 2:43 pm
Reply to  FAN, Zhiyong

Thank you for your comment and suggestion. We will be careful and noted before the next submission.

CHEN, Kevin Jing(@eekjchen)
January 19, 2022 11:49 am

Reasonably good understanding of the project objectives and background knowledge has been obtained. Progress in implementation seems to meet some challenges.

CHAN, Shu Hei(@shchanaq)
January 19, 2022 2:38 pm

Thank you for your comment. We have found the solution of dropping the material precisely on the blue LED chip. That is find a accurate position to place the QR and UV gel on the blue LED chip.

Last edited 10 months ago by CHAN, Shu Hei