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Xinyuan-LilyGO / LilyGO-T-Wristband-and-T-Glass

MIT License
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Hardware: Adjusting the T-Glass display #2

Open JpEncausse opened 3 months ago

JpEncausse commented 3 months ago

Hello, I just received the T-Glass and need to validate the Prism location.

Right Side (very far to get the focus) image

Left Side (not perfect but more usable) image

I remember GoogleGLass +10 years ago the display was close and zoom like the Photo 2 so I was wondering if the current mount is OK or if it should be turn around ? ANd if yes, how ?

quadjojo commented 3 months ago

Hey! Got my T-Glass today and was wondering the same thing. Impossible for me to see a sharp picture when in Photo1 orientation.

JpEncausse commented 3 months ago

Right Side seem to be the default way but need to be very far from eye. It's like looking at a display 1:1 I don't understand the usecase. It's like hanging a screen.

If you rotate the prism and change the code of the display you have a closer view with less luminosity and many test&learn to find the sweet spot like Google Glass. But it feel more XR Glass.

criegit commented 3 months ago

Hi,

Is there any solution to fix the glasses? I was ultra happy when the parcel shipped so quickly. But after the first test this is completely useless to me. Regular direction: I can't even focus at furthest distance. (i wear regular glasses) I hoped to be able to focus almost to infinity. Reverse direction as mentioned above: very small FOV and almost impossible to see, even in a slightly darkened room.

Is there any way to fix this?

smithjacobj commented 3 months ago

Got mine today and was confused too.

It seems like the way they have it mounted we're looking at it in un-magnified direct reflection in the prism, whereas this prism appears to be a "birdbath" (?) prism (I haven't found this language anywhere else so the terminology might be different) and should be double-boucing for good focal length (fig. C): image

https://sid.onlinelibrary.wiley.com/doi/full/10.1002/msid.1226

smithjacobj commented 3 months ago

If you don't mind taking things apart, the combiner prism is installed with a little silicone band and can be slipped out when the cover is removed, rotated, then reinstalled. Clearly you'll have to mirror the image on the display to get the correct orientation, but it gets the right side of the combiner.

Even for just the prism this device is cheap. Single-unit combiner prisms are like $500 wherever I can find them.

smithjacobj commented 3 months ago

Still trying to figure out how to flip the view with the included hardware. Setting the driver's vertical flip bit doesn't work with the display. LVGL has limited software options, so I might have to manually do it.

Izaic commented 3 months ago

I think lilygo might have pulled the product because it's now explicitly unavailable everywhere, not just "out of stock". If that is infact the case, perhaps this issue is the reason why?

criegit commented 3 months ago

I really hope that they find a fix and i would be willing to test it. (I am not a big programmer, more a hardware guy) 3d printer is available and workshop as well.

I think there is quite a market for such a device, but it needs to be bright enough and best would be to have adjustable focus. I, for example need the focus near infinity.

ossafe commented 2 months ago

Just got mine and, well ... that's real disappointing.

JpEncausse commented 2 months ago

@smithjacobj did you find some prism exemple on Aliexpress ? I'm looking for spec exemples

Looking at Google Glass (2013) I think this is what everyone expect. The prism look the same but like you explain the reflexion is way different. 500$ seems a lot I wondering if there is some alternatives. image

smithjacobj commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

Ruelvillu commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

i figured this out too, the only use able way to use it is a flipped prism, but they coated the wrong angle, making it appear as if its got this tile pattern, i dont even notice it now, but to fix your image flipping issue, i belive the solution i had was that the code is using reversed variables, also the code to make a usable tile that doesnt randomly light up other parts of the big rectangle screen has become really difficult to do, lots of times vs code decides to throw me rando errors but then ends up compiling and then failing lmao. lots of trial and error with this board and prism combo.

Ruelvillu commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

i figured this out too, the only use able way to use it is a flipped prism, but they coated the wrong angle, making it appear as if its got this tile pattern, i dont even notice it now, but to fix your image flipping issue, i belive the solution i had was that the code is using reversed variables, also the code to make a usable tile that doesnt randomly light up other parts of the big rectangle screen has become really difficult to do, lots of times vs code decides to throw me rando errors but then ends up compiling and then failing lmao. lots of trial and error with this board and prism combo.

in the end i just flipped the side to my left, not needing to recode

Ruelvillu commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

i figured this out too, the only use able way to use it is a flipped prism, but they coated the wrong angle, making it appear as if its got this tile pattern, i dont even notice it now, but to fix your image flipping issue, i belive the solution i had was that the code is using reversed variables, also the code to make a usable tile that doesnt randomly light up other parts of the big rectangle screen has become really difficult to do, lots of times vs code decides to throw me rando errors but then ends up compiling and then failing lmao. lots of trial and error with this board and prism combo.

in the end i just flipped the side to my left, not needing to recode

it also helps to either print some better mounts so that the whole prism is sitting perfectly to the iris of your eye, i have used foam and tape untill my 3d printer gets here. i will post on my git the files for the mounts, and if you also want i will post my code too

khaderm commented 2 months ago

If you don't mind taking things apart, the combiner prism is installed with a little silicone band and can be slipped out when the cover is removed, rotated, then reinstalled. Clearly you'll have to mirror the image on the display to get the correct orientation, but it gets the right side of the combiner.

Even for just the prism this device is cheap. Single-unit combiner prisms are like $500 wherever I can find them.

This works well. You can also make adjustments to the font size to fit more text on the display as the flipped prism shows less text. It is a pretty simple fix. Thanks for sharing.

khaderm commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

i figured this out too, the only use able way to use it is a flipped prism, but they coated the wrong angle, making it appear as if its got this tile pattern, i dont even notice it now, but to fix your image flipping issue, i belive the solution i had was that the code is using reversed variables, also the code to make a usable tile that doesnt randomly light up other parts of the big rectangle screen has become really difficult to do, lots of times vs code decides to throw me rando errors but then ends up compiling and then failing lmao. lots of trial and error with this board and prism combo.

in the end i just flipped the side to my left, not needing to recode

What font size do you recommend to get the most out of the screen real estate?

fadiaburaid commented 2 months ago

@JpEncausse I'm having trouble finding just the prisms again. These are mostly full displays, including a waveguide option. https://www.aliexpress.us/item/3256805265783262.html https://www.aliexpress.us/item/3256806300295194.html https://www.aliexpress.us/item/3256806474568059.html https://www.aliexpress.us/item/3256806095139269.html https://www.aliexpress.us/item/3256805177095886.html

Here you go https://www.aliexpress.us/item/1005007415787555.html

JpEncausse commented 2 months ago

Here you go https://www.aliexpress.us/item/1005007415787555.html

Thanks, what are the capabilities of this prism ?

fadiaburaid commented 2 months ago

Here you go https://www.aliexpress.us/item/1005007415787555.html

Thanks, what are the capabilities of this prism ?

  • Is it something like the GoogleGlass to see a bright image closer. Dids you test it on T-Glass ?
  • or Is it the prism used by T-Glass that doesn't work ?

I don't think the prism will solve the problem. I think a lens is needed to change the focal length. After seeing the issues with T-glass. I looked for the prism to make my own glass but I didn't try it yet.

JpEncausse commented 2 months ago

Here you go https://www.aliexpress.us/item/1005007415787555.html

Thanks, what are the capabilities of this prism ?

  • Is it something like the GoogleGlass to see a bright image closer. Dids you test it on T-Glass ?
  • or Is it the prism used by T-Glass that doesn't work ?

I don't think the prism will solve the problem. I think a lens is needed to change the focal length. After seeing the issues with T-glass. I looked for the prism to make my own glass but I didn't try it yet.

The current prism on the T-Glass "kind of" magnify the image:

The problem is that the focal is too strong (too magnified) and lost brightness because of the way it do the focal if I correctly understand. If I remember, 10 years ago, on GoogleGlass the brighness and focal were good.

@Ruelvillu can you explain how you flip the prism ? Or the code ? How is it good ?

smithjacobj commented 1 month ago

The problem is that the focal is too strong (too magnified) and lost brightness because of the way it do the focal if I correctly understand. If I remember, 10 years ago, on GoogleGlass the brighness and focal were good.

I was reading around and it seems Google Glass specifically used a polarized filter instead of simply a % filter.

LilyGO commented 1 month ago

Sorry, we have verified some issues about T-Galss.

  1. Since the low-cost solution uses AMOLED, when using AMOLED, the display effect on the prism amplification surface will be pixel amplification. Typically, the magnified surface of a prism is used to display content, which requires a high-cost solution using Micro LED screens. This kind of screen has ultra-high resolution and can display good picture quality directly through prism amplification. In addition, the screen driver needs to select a chip platform that can support driving high resolution, so the difficulty and cost of programming are also different.
  2. Our current version is indeed designed for long-distance use. Of course, if it is too far away from the eyes, there will be problems with the user experience.
  3. Solution Now we have redesigned a version of the shell structure that is closer to the eyes, but it cannot avoid the display problems and pixel amplification problems mentioned above. If necessary, you can download the 3D printing file and reassemble it after downloading. During assembly, flip the prism to the magnified display surface. We will also publish corresponding tutorial videos. At the same time, the corresponding 3D printed shell kit is also available.
criegit commented 1 month ago

Thank you for the reply. I will try your solution when i have the time. Unfortunately i do not see too much applications currently.

Please stay on this topic and maybe there is a better solution in a few years.

JpEncausse commented 1 month ago

@criegit @LilyGO thanks for this workaround, I'll give a try when I'll have some time. An upside down sample would be great. Yes the luminosity is low but it could be usable for demo.

Maybe you should also look at TranscribGlass (CES2024) and some other statup that are working on glasses unders 100$

github-actions[bot] commented 2 weeks ago

This issue is stale because it has been open for 30 days with no activity.