Hmm, you’re right, it isn’t obvious on camera that the luminance differs left to right. I’ve seen the obvious errors when stitching multiple projectors together, but then we’re talking a lot more brightness. Luminance is not the main issue right now.
I have seen this as well, Philips please look into this. This is not something users can correct and it makes keystone a very rough implementation.
I´m satisfied with everything, but there is an isse wht the image on the lieft side of the screen when looking at HDMI-input (Apple TV) The Keystone seems wrong and the border is not vertical. The right side is fine and if I switch input source to internal the screen is perfect. The ATV is updated and not defective, works fine with other screens
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@Andreas_Bjurling it’s a known issue and on our task list to solve! But maybe you’d like to attach some pictures to explain more clearly, since this issue only happens for internal android, not HDMI sources.
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I´ll see if I can get some pictures for you. But it is the opposite for me. Internal UI works perfectly, when I switch to HDMI, the left side is not vertical anymore. It did not change after software update, but remained the same
External sources (HDMI/type-c) only supports vertical keystone correction. Have you tried turning that off and see?
My initial impression is that maybe the internal is actually wrong so it’s not right when in HDMI so you might need to reposition your projector physically.
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Just for reference that this Topic is listed as Task #29 according to:
An engineer has been assigned to this issue and it is in progress.
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Just checking in to see if any progress has been made on bug #29 (linear distortion issue).
Thank you!
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Is the h linearity issue still actually being looked into? I would like to be able to actually use as advertised…(See image attached)
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Do you mean with internal content (ie. apps running on the projector itself) or external content (HDMI / USB-C)? With internal content, it should already work. If it doesn’t for you, there should be help available with that here on the forum. With external sources, it’s unfortunately never going to work because the hardware doesn’t support it. The 4 corner adjustment is part of the projector’s Android OS, and the external sources bypass that completely. See this thread for more info: INFO: Limitations of features for HDMI and USB-C inputs
Edit: sorry, just realised that you probably asked very specifically about the linearity issue and not about 4 corner correction in general.
The last issue mentioned is not relevant to this topic. Please move to a relevant thread. (See it is now merged elsewhere, thank you!)
Really hoping the work on Linearity Distortion is coming along!
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To debug/setup 4 corner (and maybe other correction) better, can we get a grid of squares texture similar to UV mapping textures but 16:9? Providing one and allowing the user to select their own would be fantastic.
This will give you orientation and stretching/compression of areas.
example, a 1080p version of:
or
This may be even better:
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