Why such a range of contrast ratios?

Discussion in 'What Is The Best TV For You?' started by merseyman, Feb 10, 2009.

  1. merseyman

    merseyman
    Standard Member

    Joined:
    Feb 10, 2009
    Messages:
    7
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    1
    Ratings:
    +0
    Looking though an Argos catalogue at 26" LCD TVs the contrast ratios on offer range from 700:1 to 30000:1

    Why such a big range?

    Does it actually make much difference?
     
  2. Nielo TM

    Nielo TM
    Well-known Member

    Joined:
    Oct 30, 2005
    Messages:
    5,062
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    LDN
    Ratings:
    +549
    Because manufacture don't use the industry standard to measure it


    So quoted contrast are just that...meaningless!
     
  3. glesgaguyav

    glesgaguyav
    Active Member

    Joined:
    Jul 30, 2006
    Messages:
    1,143
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    63
    Location:
    Glasgow,Scotland
    Ratings:
    +117
    My 3 year old 40" JVC has a quoted 800:1 contrast ratio and to be honest the picture is as clear and bright as is needed IMO, the high range contrast ratios are just a marketing ploy, you would probably find you would be turning settings down in any case.
     
  4. Nielo TM

    Nielo TM
    Well-known Member

    Joined:
    Oct 30, 2005
    Messages:
    5,062
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    LDN
    Ratings:
    +549
    actually, one does need higher dynamic range to produce the deepest blacks. However static is just as important.

    Most locally dimmable LCD and advanced PDPs have infinite dynamic range, but when it comes to static, it's still below 10,000 for PDPs and 3000:1 for LCDs.
     
  5. ziffius

    ziffius
    Well-known Member

    Joined:
    Feb 5, 2008
    Messages:
    1,884
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    83
    Ratings:
    +292
    5000:1 for LCDs.

    SAMSUNG's Digital World

    Colour gamet has been reduced though.
     
  6. Monarch

    Monarch
    Well-known Member

    Joined:
    Dec 8, 2008
    Messages:
    8,641
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    136
    Location:
    The North
    Ratings:
    +1,143
    Ignore contrast ratios unless you're comparing between TVs made by the same brand. Contrast ratios are also measured in ideal conditions.

    And, despite what some people say, the contrast ratio of LCDs typically maxes out at around 1,000:1 (a little higher on the newer top models) and plasmas at around 2,500:1 (maybe up to 3,000:1 on newer ones).

    So you do need a good contrast ratio but you can't compare TVs made by different brands because different panels and different manufacturers produce different figures, contrast ratios can be useful when comparing all TVs made by the same brand though
     
  7. Nielo TM

    Nielo TM
    Well-known Member

    Joined:
    Oct 30, 2005
    Messages:
    5,062
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    LDN
    Ratings:
    +549
    That's the dynamic range (not to be confused with dynamic contrast)

    The value of static CR is always lower than dynamic range
     
  8. Chris Muriel

    Chris Muriel
    Well-known Member

    Joined:
    Jun 14, 2002
    Messages:
    7,280
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Manchester
    Ratings:
    +763
    Contrast Ratio is a marketing man's dream !
    It's like the quoting of processor power in MIPS (Millions of Instuctions Per Second) - oft referred to as " Meaningless Information Put foward by Salesman.

    Chris Muriel, Manchester
     
  9. Nielo TM

    Nielo TM
    Well-known Member

    Joined:
    Oct 30, 2005
    Messages:
    5,062
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    LDN
    Ratings:
    +549
    Yes; CR, colors, RT, gamut, panel update speed/refresh rate etc... are all excellent marketing ploys.

    However, their role in the final image quality is apparent. You also have to take in the quality of the video processor.

    Having said that, the numbers provided by the manufactures are usually without any substance. So to be >90% accurate, one would have to test each sets in a standardized environment.
     
  10. Chris Muriel

    Chris Muriel
    Well-known Member

    Joined:
    Jun 14, 2002
    Messages:
    7,280
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Manchester
    Ratings:
    +763
    The way output power of audio equipment is marketed is probably a reasonable analogy .
    (Watts output in RMS, Music Power, PMPO, level of distortion at which these figures are quoted etc. etc.)

    Chris Muriel, Manchester
     

Share This Page

Loading...