Jump to content

Owen

Members
  • Content Count

    13,011
  • Joined

  • Last visited

Community Reputation

93 Good

About Owen

  • Rank
    10,000+ Post Club

Profile Fields

  • Location
    NSW
  • Country
    Australia

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. When you say the image is "soft", are you talking about the appearance of pixels up close, of the overall appearance of movies from a normal distance? The X35 is not an E-Shift model so don't worry about that.
  2. So the problem disappeared when the video cables where disconnected. 😉
  3. When it comes to firmware updates it's wise to wait and see what issues are addressed by the update and what the negative side effects there may be. Unless the update is proven to address a problem you have and not introduce new issues hold off. I would be inclined to return the projector and get a full refund and buy again when the all the issues are resolved in a satisfactory way. As it stands there are unresolved issues that render the product unfit for purpose so a refund is in order.
  4. Thats the reason. People who have never seen a quality projector are always impressed when they do, TV's can't compete. JVC projectors have been providing sensational images for many years. The new models trade off contrast for more pixels which isn't helpful for the vast majority of movie content IMHO.
  5. If it does that with no video cables connected its definitely faulty. I fix will cost you so I would just live with it. Turn the projector off via the remote or power button on the back and after the cooling cycle finishes disconnect the power with a remote switch of your choice. Its not a big inconvenience and turning back on will be quick and easy. You will save power as well. 😀
  6. Haven't heard of that issue before. By "standby" I assume you mean projector off but still connected to power? Are you using the remote to turn the projector on? What about the power button on the back of the projector?
  7. You mean UN applying HDR. Thats what "tone mapping" does and it's necessary because projectors are SDR display devices.
  8. That depends on how much you value contrast and blacks. As far as I am concerned the best E-shift JVC's made to date are only just OK for contrast and blacks, they leave a lot to be desired IMHO. A significant step backwards in contrast performance is NOT an option.
  9. Rather than rely on a level, simply adjust the image up and down by tilting the projector until the keystone error is removed than adjust the final position of the image with lens shift. I have not seen any explanation of how lens shift works but it does. Its a feature that is lacking on cheap projectors because it adds signifiant cost to the lens system. You should be able to get the projected image to match the screen within a couple of mm, assuming the screen isn't out of shape to begin with, and thats not a given.
  10. I expect most customers already own a JVC projector so there is no real pressure on them to buy anther one until all the issues are addressed. The BIG issue for me has nothing to do with any of the "problems" reported to date. Even if none of these annoying little defects existed the native contrast ratio of these native 4K units is simply not good enough for them to be even considered for purchase IMHO. I expect it will be 2 years or more before the 4K models will even equal the native contrast of the better E-Shift models, let alone improve on them. Until they can I see no reason to buy anything, especially another brand that also cant deliver acceptable contrast and has its own set of problems. Owners of new JVC models should be entitled to a full refund under consumer law unless the issues are resolved, the product is unfit for purpose as it stands.
  11. If the projector is pointing up or down at the screen (not level) the sides of the image will not be parallel (keystone error). It is intended that you adjust the vertical position of the image with lens shift ONLY, as that will not introduce keystone error, never tilt the projector. NEVER use the digital keystone correction unless there is no other option, even then it would be better put up with some keystone error. If the distance from the centre of the lens to the left and right edges of the screen are not the same the image height will be different on each side. Use a tape measure to check. Hope this helps.
  12. You MUST get the projector exactely horizontal to and at right angles to the screen surface.
  13. If price is of prime importance the Benq DLP probably has merit, but DLP has always been the bottom of the projector technology heap, especially single chip DLP, which is used because its the cheapest projection system to make NOT because its the best. Any comparison to cinema DLP projectors is silly, the cinema units use 3 BIG DMD chips (as apposed to 1 small one) and therefore they can project all colours simultaneously like other 3 chip systems (LCD, LCoS, D-ILA) so no chance of viewer fatigue or distress. 3 chip DLP is very light efficient and gives the highest light output per unit light input, which for commercial cinema applications is critical. This is because there is no need to use a colour wheel and time share a single imaging chip to display the 3 primary colours. The large imaging chip size used in commercial cinema projectors also adds significant light output efficiency but adds a LOT of cost. The BIG problem with DLP, at any price, is poor contrast. Its a fundamental limitation of DLP technology that no projector manufactures can address. The sad thing is that the native contrast performance of the new so called "4K" single chip DLP light engines is significantly worse than quality 1080 DLP projectors of 10 years ago, and they where uncompetitive against LCoS and D-ILA tech even back then. The situation has not improved since. Native contrast is THE most important factor in images "quality", significantly more so then "resolution, in the opinion of most people, especially me. To put the contrast thing into perspective, a 8 year old base model JVC projector has at least 10 times better native contrast than this DLP and others like it. To describe these DLP projector as "True" 4K is telling fibs. Its a 1080 pixel shift system that does not conform to any DCI 4K standard and certainly not the 4K domestic video standard of 4096 x 2160. I'm not saying "resolution" is an issue given that "4K" movies are less than 3K at best, just pointing out that these DLP projectors are NOT "true" or "native" 4K and cannot be legitimately be marketed as such even though resolution is plenty good enough. Cant say the same about contrast though. It should also be noted that if the P3 colour space is used light output will drop by 30 to 50% which is significantly more loss than is typical with non DLP lamp based projectors and makes "wide gamut" mode effectively useless on anything other than small screens. Time sharing a single imaging chip to display 3 primary colours has its limitations. I have posted this as a reality check to counter the marketing hype I see presented here.
  14. +1. There is not such thing as a lossless lens at ANY price. An additional lens in the light path with ALWAYS degrade resolution, sharpness, chromatic aberrations, geometric distortions etc, etc.
  15. Thanks mate, I aim to be informative. Digital projectors are "fixed pixel" displays and the red, green and blue imaging chips can't be moved/realigned outside the factor setup environment. The only so called "convergence" adjustment that can be done without image degradation is to move the image on one or more of the imaging chips electronicly in full pixel steps horizontally or vertically to better align the colours, but this should have been done in the factory and be the "zero" or all adjustments disabled point. Obviously moving the image by a full pixel affects the entire screen by the same amount and if there was a half pixel error there will still be a halve pixel error after adjustment, the misalignment will just be in the other direction. If, for example, red is offset to the right of green by say 3/4 of a pixel, moving red to the left by a full pixel will give an error of 1/4 pixel to the left, which is obviously a better solution. One must be very careful to use an appropriate test pattern to check that you have not inadvertently incorrectly diagnosed which pixel-line the red pixel-line belongs to or you will end up moving red in the wrong direction and end up with a 1 and 1/4 pixel error in one direction or a 1 and 3/4 pixel error in the other. This can look just fine on a some test patterns but is obviously NOT good for a real picture. If the factory didn't do its job by setting the full pixel adjustment correctly and set it as the zero point of the user adjustment there are improvements to be had by full pixel "adjustment". Thats correct. We can't actually move the pixels in a digital projector, we can only use adjoining pixels to counteract a colour fringe caused by mis convergence of less than a full pixel. I'll give an example. Lets say green and blue are aligned but red is offset to the left by half a pixel causing a red fringe. The "correction" system can't make the red go away, it can only illuminate the green and blue sub pixels belonging to the adjoining pixel on the left to neutralise the red colour of the fringe, however in doing so it has made the pixel-line we where attempting to correct 2 pixels wide. You don't need to be a rocket scientist to figure out what that does to "resolution". So, using anything other than the full pixel adjustment involves using 2 or more pixels to do the job of one and obviously degrades resolution. Correcting a half pixel error can halve the resolution of the projector instantly and yet Sony have been using sub pix "correction" on their 4K projectors from the factory and give the user no way to turn it off. The amusing part to me is that users just don't notice the loss of resolution because 4K video is never actually 4K (other than in pixel count). Manufacturers take advantage of this to hide poor factory convergence which could lead to consumers returning projectors. What they don't know wont hurt them, as long as they don't see significant colour fringing they are happy and don't complain so problem solved. Its cheaper than better quality control of the optical engine manufacturing process and allows a lot of less than best optical engines to be used. and never will be so getting all worked up about "resolution" is just plain silly IMHO. Whatever errors remain after the full pixel alignment CANNOT be corrected without causing blur and a notional loss of "resolution". I say "notional" because movies are inherently very blurred at the pixel level to begin with and unless you view digitally created test patterns people aren't going to be aware of it, especially with 4K systems.
×
×
  • Create New...