The technology used in the panel is really important. Many cheaper
panels use technology that cant actually do 8 buts per colours - typical
panels can only manage 6 bits. The processing inside the panel then maps
the 8 bit input into the available colours. Most don't even try to do a
linear mapping and either throw away the dark most colours or make the
light most colours all white. This shows up on a grey scale really
easily. Like many many things in the computer industry the
specifications are not worth the paper they are written on, for exam the
contrast is measured by taking the dimmest possible back light setting
and the brightest possible back light setting which is 1000s of times
more contrast than can be obtained in a real picture where the panel
blocks a constant back light. As you would expect no specs are provided
for things that matter like even illumination throughout the screen or
red, green, blue colour purity or linearity of the colours or back light
leakage around the edge of the screen or screen reflectivity or contrast
with a constant back light or purity of the white (determined by the
back light) etc etc.
My advice is either find reviews where they actually measure the panel
or use one and display an it8 or HCT colour test chart and look for
strangeness's. I have a dell ultrasharp and am very happy with it - no
dead pixels and is very linear. I measured it and calibrated it using a
colourvision spyder 2 and the linearity is very good.
Summary
TN panels ONLY SUPPORT 6 bit internally AT BEST! ALL that I know of
dither or throw away to accept an 8 bit input AVOID for high end use
IPS cheap ips also dither and are 6 bit internally GOOD ips variants may
handle 8 bit
PVA expensive, cheap will only do 6 bit the medium models (S-PVA) 8 bit
and a few very very expensive 10+ bits
Good luck
James
On 09/03/2010 04:25, Sue Pearce wrote:
> When my trusted Sony Trinitron monitor finally died a couple of years ago, I
> was despondent. I visited the monitor section of the Will Crockett "Shoot
> Smarter" site amd read the reviews. In more recent updates, he can regail
> all of you with the reasons that no consumer monitor can do the job. After
> reviewing his results, I visited a recommended website where I bought a
> LaCie 321 monitor. It is easy to profile, and my prints come out exactly
> like I viewed them. I recommend it highly.
>
> As I read that and other websites, I am told that the reports that the fancy
> monitors are no more than repackaged panels from the same old folks are not
> true.
>
> Bill Pearce
> ----- Original Message -----
> From: "John Hudson"<OM4T@xxxxxxxxxxx>
> To: "Olympus Camera Discussion"<olympus@xxxxxxxxxxxxxxxxx>
> Sent: Monday, March 08, 2010 5:25 PM
> Subject: [OM] computer monitors by brand
>
>
>
>> Are there any opinions on the desirability of any particular brand of
>> computer monitor?
>>
>> I am looking to step up from a 19" diagonal 4 : 3 aspect ratio ViewSonic
>> screen to a 24" diagonal 16 : 9 ratio screen.
>>
>> The brands I have looked at so far include ACER, LG, Samsung, Dell, HP,
>> and
>> ViewSonic. There seems to be a consensus that LG and Samsung lead the
>> pack,
>> ACER trails and that HP excels at having punched up super saturated
>> colours
>> on highly reflective screens.
>>
>> I do not run video games. The reason for wanting width is to have side by
>> side Photoshop images or Dreamweaver pages on screen.
>>
>> Getting an upgraded video card to handle a 1920 : 1080 resolution [ 16 : 9
>> aspect ratio] is another but minor issue.
>>
>> All and any opinions will be appreciated.
>>
>> John Hudson
>>
>>
>>
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