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Nini tofauti kati ya Plasma, LED na LCD flat screen TV??

Discussion in 'Tech, Gadgets & Science Forum' started by YoungCorporate, Apr 22, 2012.

  1. YoungCorporate

    YoungCorporate JF-Expert Member

    #1
    Apr 22, 2012
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    Nafahamu kuwa tofauti kuu ni mfumo wa ku-display picha, kama brightness, refraction,angle of view n.k....je katika matumizi ya kawaida tofauti ni ipi hasa ambayo watumiaji mliotumia aina tofauti hizi za TV technology mmezi-experience??
     
  2. Inkoskaz

    Inkoskaz JF-Expert Member

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    Apr 22, 2012
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    led...light emmiting diode. .ya kizamani kidogo
    Lcd...liquid crystal display..hii ndio bomba ina muonekano mzuri
    Plasma ni kama projection hivi
     
  3. Kiranja Mkuu

    Kiranja Mkuu JF-Expert Member

    #3
    Apr 22, 2012
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    LED ndio za kisasa na ni xpensive kuliko LCD na Plasma
     
  4. Ozzie

    Ozzie JF-Expert Member

    #4
    Apr 22, 2012
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    Copied and pasted from Internet:

    LCD TV

    LCD stands for Liquid Crystal Display. This technology was created to replace the CRT technology.

    Plasma TV
    The shortcomings of LCD TV led to the development of Plasma Display Panel, otherwise known as a plasma TV. With this technology, images are created from gases containing neon and xenon atoms.

    LED TV
    This is basically an advanced model of a LCD TV, which uses Light Emitting Diodes instead of the traditional Cold Cathode Florescent Lamps for its backlight.

    Differences

    Sizes of the TV
    The standard sizes of flat screen TV are 22, 26, 32, 37, 40, 46, 50, 55 and 60 inches. LED TV are available from 32 inch onwards. Plasma TV are available from 42 inch onwards.

    Prices
    Generally Plasma TV are cheaper than the equivalent size LED / LCD TV. LED is the most expensive.

    Electricity Power Use
    LED TV is the most efficient in terms of electric power use. LCD comes next and Plasmas require the most current or electric power. Plasma was notorious for consuming lots of current but now has become much more efficient.

    Life of LCD and LED TV, Lifespan of Plasma TV,
    All TV loses some of it brightness as the years go by.
    The lifespan of a flat screen TV is defined as the working time in hours it takes for the screen brightness to become half its original brightness.
    For LCD and LED the figure quoted is over 100,000 hours = 54.8 years (when viewed 5 hours every day).
    For the life of Plasma TV the figure quoted is 60,000 hours = 32.88 years (when viewed 5 hours every day).

    Size and Weight of TV
    Just by looking at a flat screen TV you will not be able to tell whether it is an LCD or LED or Plazma TV. They all look the same. LED TV can come with a very thin profile (front to back). Plasma TV is usually the heaviest and LED TV the lightest.

    Viewing Angle
    Plasma TV without doubt has the best viewing angle. LCD and LED suffer from picture degradation as you move towards the sides of the TV. The picture also suffers if the TV is placed well above or below eye level.

    Plasma TV Burnin
    Plasma TV used to have a problem known as 'Burn-in'. Plasma TV Burnin occurs when there is one constant picture on the TV screen all the time, for example the logo of a TV station shown all the time in one corner of the TV. If you watch this TV station for a long time then that logo seems to get imprinted on the TV screen. When you watch another channel, the logo of the TV station referred to before, seems to appear as a ghost image on all channels. This is the phenomena called 'burn-in'. Now Plasma TV manufacturers have a plasma tv burn in fix to overcome this problem.

    TV Brightness & Colour
    LCD / LED TV normally have brighter screens and perform better in very brightly lit rooms. But under normal or dim lit rooms Plasma TV picture is better. Plasma has richer colors which appear more natural, whereas in LCD /LED TV the color tends to be oversaturated.

    LCD and LED TV Motion Blur
    LCD and LED TV suffer from an effect known as 'Trailing image' or 'Motion Lag'. This becomes obvious when you are watching fast action sports. For example in football the ball, and sometimes the players, moving fast appears blurred with a trailing ghost image behind. Plasma TV does not have this problem and so is usually the TV of choice amongst Sports enthusiasts.

    Contrast Ratio
    Plasma TV has higher contrast ratios than LCD or LED TV.
     
  5. Isaac Chikoma

    Isaac Chikoma JF-Expert Member

    #5
    Apr 22, 2012
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    flat screens,ni screen yoyote tu iliyo flat bila kuangalia technology.LED screen ndo the best,inaundwa na taa ndogondogo,diodes size ya pixel moja kujaza screen nzima,viewing angle ni 150 degrees,colour resolution up to 16+ million colours,LCD,liquid crystal displays,inadisplay kwa kutumia liquid crystal,sreen inakuwa embedded na taa kwa ajili ya kutoa mwanga.plasma ni membrane yenye vitundu vidogo sana,electons zinapita ili kuonyesha picha.
     
  6. Inkoskaz

    Inkoskaz JF-Expert Member

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    Apr 22, 2012
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    maelezo ya Ozzie yameelewesha vizuri
     
  7. T

    TEGEMEA JF-Expert Member

    #7
    Apr 22, 2012
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    Hongera ozzie
     
  8. mmura

    mmura Member

    #8
    Apr 22, 2012
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    Thanx for the info 0zzie
     
  9. T

    Tewe JF-Expert Member

    #9
    Apr 22, 2012
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    Ozzie i am getting confused that 100,000hrs = 32yrs@5hrs per day and 60,000hrs = 54hrs@5hrs per day
    Clarificatinsplz
     
  10. YoungCorporate

    YoungCorporate JF-Expert Member

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    Apr 22, 2012
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    Mkuu umesomeka...thanks
     
  11. YoungCorporate

    YoungCorporate JF-Expert Member

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    Apr 22, 2012
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    mkuu unge-break down katika lugha rahisi siyo ya ki-elektroniki.....membrane, electrons......anyways thanks
     
  12. ndetichia

    ndetichia JF-Expert Member

    #12
    Apr 22, 2012
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    hiyo inatokana na teknolojia husika iliyotumika kutengeneza hiyo tv..
     
  13. Ozzie

    Ozzie JF-Expert Member

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    Apr 22, 2012
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    If you view your TV 5 hours per day, then in one year you can view for approximately 1825 hours. So when 60,000 hours of viewing a plasma TV until it life span are divided by 1825 hours viewed in a year we get 32.88 years, and when 100,000 hours (life span of LCD/LED) are also divided by 1825 hours, we get 54.8 years. That is what they say. Credits are not mine.
     
  14. B

    Bukyanagandi JF-Expert Member

    #14
    Apr 22, 2012
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    Mkuu tukiondoa technical jargon ni kwamba TV za LCD na LED actually zote ni LCD, tofauti zake ni mwanga kwenye background (backlight) unatokana na nini, kwa mfano:


    • LCD TV ukiangalia kwa makini TV hizi wakati kuna ragi nyeusi utaona kuna mwanga kwa mbalii, yaani rangi si nyeusi tii, hii inatokana na kutozimika kabisa kwa backlights za Florescent lamps, wakati kuna scene nyeusi.


    • LED TV na zenyewe ni LCD isipokuwa hizi zinatumia light emmiting Diodes kama backlight, hivyo kama kuna scene nyeusi LED zinazimika kabisa, kwa hiyo weusi unaonaekana weusi kweli, like inside of a pocket, hivyo TV za LED muonekano wa picha zake ni nzuri zaidi kwa kuwa hakuna diffusion za mianga.


    • Plasma TV hizo zinatumia rare gases atoms ku-generate picha, ingawa picha zake zinakuwaga nzuri ukilinganisha na LCD, tatizo kubwa nu utumiaji umeme-zilakula umeme sana.

    Mkuu mchango wangu ndio huo.
     
  15. SHERRIF ARPAIO

    SHERRIF ARPAIO JF-Expert Member

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    Apr 22, 2012
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    Kwa kuongezea, kama unataka kununua tv, then nunua LED, and make sure unanunua LED, 120mhz. Usinunue chini ya 120 mhz
     
  16. M

    MANAKE MKARI Senior Member

    #16
    Apr 23, 2012
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    Haya mateknolojia yanakimbia mno tatizo lake. Sasa hivi the latest ni 3D siyo LED tena! Ukizifuatilia utakuwa unanunua after few years!
     
  17. YoungCorporate

    YoungCorporate JF-Expert Member

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    Apr 24, 2012
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    mkuu unaonaje ukifafanua kidogo angalizo lako la frequency kwa manufaa ya wote?? kimsingi kwa nini unasema isiwe chini ya 120MHZ
     
  18. YoungCorporate

    YoungCorporate JF-Expert Member

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    Apr 24, 2012
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    Sure mkuu LG wanazo hizo 3D....Zimetulia kama ni mtu wa muvi za 3D....
     
  19. drphone

    drphone JF-Expert Member

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    Apr 24, 2012
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    sasa hivi ni mambo ya 3D unapata na miwani yake akuna cha led wala nn hapo
     
  20. CAMARADERIE

    CAMARADERIE JF-Expert Member

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    Apr 24, 2012
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    Manufacturer yupi ni reliable? juzi niliiona moja SINGSUNG sikuelewa
     
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