KHLB2 (but other Compal barebones as well) screen

Hi, I am already asking for this in Hardware topic, but it is about Compal KHLB2 based notebook, so I think someone who has KHLB2 (or any compal product) could help me. My qestion is simple, is there any problem with my KHLB2 screen, or is this normall when viewing screen in dark room with brightness on max? Some told me that it is light leakage, but I think its just bad viewing angles of display. So, someone with KHLB2 - does you screen look like this in similiar conditions? Like viewing from close distance etc. Its on this video in time 0:28 http://www.youtube.com/watch?v=JWTCCiuKzzc

 

Come on... Please, just tell me if your display also looks like that one on the youtube video I posted... I just wanna know whether my display is somehow corrupted or not. This couldn´t be problem for you just to watch that video and tell me...

 

The quality of the video is so bad that I can't tell you anything... if your display has the quality of that video you should exchange it immediately ;-).
The display on my FL90, the stock Chi Mei N154Z1-L01 matte WSXGA+, has a pretty good viewing angle and the illumination is consitent on the whole screen. Can you describe your problem more specific?

 

Its simple, what you can see on that video, in time 0:28, is exactly what I see on my KHLB2 screen. The quality of the video is more than sufficient to see it. I dont think its ilumination problem. As you can see on the video, bottom of the display is very white, and upper corners are white too. But I dont think its ilumination problem. I think its viewing angle related. Actually I havent seen display which would not be extra-bright when viewed from angle. But I just remember it from my school friend - I mean, I dont have any other notebook to look at, and I wont see this friend till October. So I wanna ask wheather this is normal state for the notebook screen. It is brightenes on maximum in the dark room, but you can see it in lightened room as well, but not so badly.

BTW I found video of Compal JHL90, when you cen see it in darker room. Again, quality of the video is not best, but you can see pretty clearly what I am talking about. http://www.youtube.com/watch?v=DwIY2yb5ZL8&feature=related

 

Yeah... the problem is, that if you are filming a display you will always see a 'black arc' at this position (however, depending on the angle the camera is held), just like you will always see moving bars if you film a CRT monitor (below 100 Hz). In both videos you clearly see that it is the light of the camera reflecting on the display that is causing this 'black arc'. However, you are not supposed to see this with your own eyes, regardless of the viewing angle. I see no such phenomena at my screen even at a flat angle.

Or you mean that parts of the display seem brighter than others, depending on the viewing angle? If that is what you mean, then yes, I have that 'problem' too, but it is normal on LCD displays, however, compal does not use state of the art displays, so it may be a little bit worse. Also, I think this is more noticeable with the HD 3650 than it was with the stock 8600M GT, but I guess this must be my imagination.

 

Well, I must admit, I dont know what do you mean. that black arc is caused by the viewing angles. I mean, no light from any camera can cause upper corners to shade. And if upper cornes are shaded becouse of angles, than logically, bottom corners must be brightened becouse of videwing angles. And its not light from the camera. Notice on second video, if the camera goes close to keayboard, according you keyboard should be illuminated, but its not. More, you can actually see the diode from camera on the display, and there is no light above the centre view of the camera, but noone would made camera light that would illuminate only thing under the centre of the recording picture.

 

Let's just forget about that videos. I guess it is simply a viewing angle problem which - unfortunetly - seems to be very bad on that display. Check out this Review of the KHLB2 http://www.notebookcheck.net/Review-Compal-KHLB2-Notebook.14963.0.html there you also find a video with which you can compare your display.

 

Yeah, I know. But in that video, you cant really see what I mean, becouse they are not showing viewing angles on black background. On video I posted, you can actually see, that even if you look at you LCD straight, there is shading towards upper corners and lightening towards bottom of the screen. More brigntenes + less ambient light = much more noticable, just like on that videos. Do you have it same way? BTW, like you said you thinkg something is worse now with new GPU, I think you may not imaging it. With bigger brightenes af the display, you can see it more, and another card or its drivers could change brighteness...

EDIT: This is photo of this effect on Asus notebook. This is what I mean, no flash used, quality photo:

BTW: that arc is there becouse camera has only one "eye". With 2 eyes the arc effect is less noticable, but other remain.

 

Ummm, I never noticed such effect on my display, I checked it yesterday night. I guess, however, that we cannot compare our display since yours has LED backlight... but that technology should increase the quality of the display and not the other way around.

 

By "such effect" you mean so much, or that you dont have this effect? I checked my girlfriend mothers notebook (17" CCFL), and there is same effect, but not that noticeable (but still significantly). There are 2 things, which help to cover it - first, its CCFL, so that light is more yellwish, which is more accepable on dark beckground than LED white, and the second, it has matte display, which blocks the light, so it doesent glow so much. You have matte display, so I think its the same. Could you take photo of you display at night or in dark room with maxed brighteness and black background? Just to compare.

 

B.Gen would it be possible to just take a picture of your own display and show it to us?

 

Quality is not good, however, it should be enough:


Althoug the illumination is not consistent (which in real is not so noticeable than on the picture) there is no such effect. I think it's because the overall brightness of this display is not that high and because it's matte.

 

Why? That photo I posted is exactly what it looks like in night with maxed brightennes. But I´ll take some tonight, but you must wait 12 hours youse its morning right now in middle Europe...

 

So, there are my photos. But, I think that the black-background images are actually kind of better than real, thanks to camera, but the one from Battlefield-Heroes game is much worse on photo than it is in real. Camera was in the middle of the screen, the upper corners are not overbrightened, they are nagatived, you can see it on the Battlefield Heroes picture. The notebookcheck test image is also much worse than it looks like in real. Overall, the quality is pretty bad, becouse this was taken with HTC Touch Diamond smartphone. I´ll take better pictures tonight with regular camera, if my girlfriend lend me her...

Minimum brightenes:
Maximum brightenes:
Notebookcheck test image :
Battlefield-Heroes loading screen :
Battlefield-Heroes ingame :

 

So, I have just got screwed by IE8, everything I wrote is destroyed. So just the main thing - in past days I noticed that cameras light (brighteness) regulation can make this effect almost dissapear, if you lower the brighteness few steps (3 on KHLB2). But its still there, you can see it by your eyes, just camera makes it almost dissapear. I found that Asus G50VT-x1 has same display as KHLB2, Asus G71 has different 17" HD display and G50VT-x5 has different 14" display as well.

There is G50VT-x1 (same screen as KHLB2), you can clearly see the "efect". Its not too bad in real, but its not good. http://www.youtube.com/watch?v=XWTzNJ2Cda8&feature=related

There is G71 with HD display, there is this effect also http://www.youtube.com/watch?v=mzv3Rxf85DA&feature=related

So, I think its quite normall (its not good, but at least there is nothing wrong with my machine...)