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HDTV
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Dimitri
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PostPosted: Tue Jul 19, 2011 7:50 am    Post subject: HDTV Reply with quote



Dimitri

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gelandangan
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PostPosted: Tue Jul 19, 2011 3:03 pm    Post subject: Re: HDTV Reply with quote

thats so true it aint a joke..

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slimjim
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PostPosted: Tue Jul 19, 2011 7:26 pm    Post subject: Re: HDTV Reply with quote

Come on, Dimitri. The technical challenge of manufacturing large-area LCD for HDTV applications is more challenging than smaller LCD monitors.

Everyone that has seen our new Sony 700 series has been impressed.

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Dimitri
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PostPosted: Tue Jul 19, 2011 9:11 pm    Post subject: Re: HDTV Reply with quote

Miniaturization is harder for manufacturing then larger sizes, per square inch, the larger the screen the cheaper it is assuming similar resolutions.

A replacement Samsung 55" HDTV LCD will set you back $550, and notice I said "replacement", which means that the costs of the screen, plus the money that Samsung will profit for selling it to you to repair your TV. Which is completely encased in a protective metal body, as the outer plastic TV shell is just to make it look nicer then the crude stamped steel components.

But the 9.7" 768x1024 HP Touch pad's OEM cost for the LCD is 70$, without the touch hardware (total would be 150$ if including the touch layer & hardware). And the LCD, is bare, no metal protection or anything, a thin piece of what looks like a mirror more or less.

The 55" LCD has a surface of 1285 sq inches, but the 9.7" LCD only has just under 40 square inches. So per square inch, the 55" monitor is cheap at 43 cents per square inch, for replacement value, but the 9.7" monitor is 1.75$ per square inch, at OEM costs.

Per Square inch, the Samsung has a mere 1614 pixels. But the HP touchpad has 19,660 per square inch. which means that the Touchpad's pixels must be produced at over 10 times the density of the HDTV LCD's pixels per square inch.

As for the real sizes of the pixels. The Samsung monitor has pixels that are 0.025" x 0.025" in size, the HP Touch pixels are 0.007" x 0.007" in size. Which is over 3 times the reduction in size for the square dimensions of it.

Hence the relatively more expensive cost per square inch.

Dimitri

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slimjim
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PostPosted: Wed Jul 20, 2011 7:25 pm    Post subject: Re: HDTV Reply with quote

Dimitri, I beg to differ. Its not the cost per square inch, consider the cost per pixel is what matters.

The 9.7" 768x1024 HP costs about a penny for 100 pixels. Each pixel is a transister. A replacement Samsung 55" HDTV LCD costs 2.7 cents per 100 pixels. Also, as the size increases, the mortality rate during production increases which drives up costs. Miniturization in silcon technology is easier to manufacture. That is why smaller LCDs came before the larger area HD TVs.

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Last edited by slimjim on Fri Jul 22, 2011 2:23 pm; edited 1 time in total
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Dimitri
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PostPosted: Wed Jul 20, 2011 7:58 pm    Post subject: Re: HDTV Reply with quote

Actually at the OEM level, LCD's are priced in a "density per square inch" method.

The defect rate generally goes up as the density gets larger. Which is why I evaluated the costs of both in that manner. Miniaturization in silicon technology is anything but easy.

The smaller the components, the more defects due to smaller limits on the allowable "impurities" of the devices being made. Typical silicon for LCD's is made to 99.97% pure, but to miniaturize down integrated circuits such as your CPU, the silicon must be greater then 99.9999% and which each step down in miniaturization that purity number just keeps needing to be closer to 100% as possible. Which is why the costs for LCD's get based on the density, as more specialized equipment and materials are needed to produce them.

Dimitri

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Ominivision1
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PostPosted: Wed Jul 20, 2011 8:19 pm    Post subject: Re: HDTV Reply with quote

Actually D: I believe Slim is right, also the larger the screen, the higher the defect rate. Here is a white paper and note chapter 2.1. LCD White Paper It's a PDF file 10 pages.

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