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HP w1907の取扱説明書・マニュアル [全11ページ 2.56MB]

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Maruko H. - 2013-09-01
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2 Introduction Liquid crystal display (LCD) technology was first invented decades ago and has been improving ever since -to the point that today's high -quality flat panel displays deliver crisp, clear visual quality at a reasonable price. Even so, some LCD monitors may harbor tiny defects due to the extreme complexity of the manufacturing process. To deal with these inevitable minor flaws, HP has developed a set of policies and detection me thods to help ensure that each customer receives the highest quality product available. Executive summary Flat panel LCD technology is a complex subject. To help you understand how pixel and sub -pixel defects occur, and what HP does about them, this white paper explains:  What are sub -pixels and how do they work? A detailed look will show that millions of tiny sub -pixels cover the typical flat panel screen, producing the mixture of color and detail that forms the sharp, vibrant images flat panel users have c ome to expect.  How do pixel and sub -pixel defects occur? The HP specification does not allow for any full or complete pixel defects. It does, however, allow for some minimal sub -pixel defects. This is because the current state -of-the -art in manufacturing processes still may produce a few sub -pixel defects per screen. These defects can be extremely hard to see unless they are viewed under special conditions, or unless they happen to be clustered in groups. Nevertheless, special practices and policies have be en devised to reject any complete pixel defects and minimize sub -pixel defects.  What is HP doing about it? HP has conducted a detailed study of its standards for sub -pixel defect specifications, and as a result, has adopted a more stringent unified standar d for all models, which is discussed in greater detail later in this paper.  Why is this important to me? Doing business with HP gives you the advantage of dealing with a company that strives to consistently deliver a higher standard of quality to its cust omers. In this case, no full or complete pixel defects, and fewer sub -pixel defects than most competitors. This means better quality for the customer and ultimately greater satisfaction for the end user because the user is viewing a cleaner image without t he distraction of pixel defects.

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このマニュアルの目次

  • 1 .
    1 Understanding pixel def...
    1 Understanding pixel defects in LCD monitors Bob Myers Displays Business Unit Last revised: July 1, 2009 Introduction ................................ ................................ ................................ ......... 2 Executive summary ....
  • 2 .
    2 Introduction Liquid cr...
    2 Introduction Liquid crystal display (LCD) technology was first invented decades ago and has been improving ever since -to the point that today's high -quality flat panel displays deliver crisp, clear visual quality at a reasonable price. Even so, some...
  • 3 .
    3 Understanding TFT -LCD ...
    3 Understanding TFT -LCD technology Thin -film transistor (TFT) technology refers to a type of liquid crystal display (LCD), also known as an active -matrix LCD (AMLCD), used in all HP LCD monitors as well as HP iPAQ devices an d HP notebook displays. To ...
  • 4 .
    4 The advent of thin -fil...
    4 The advent of thin -film trans istor (TFT) technology allowed transistors to be placed at each picture element or sub -pixel. These can switch very quickly, and then hold the state of the sub -pixel while the panel drivers take care of the other rows and...
  • 5 .
    5 How to spo t a sub -pix...
    5 How to spo t a sub -pixel defect Due to their tiny size relative to the screen, defective sub -pixels can be extremely hard to see. A defect in a sub -pixel is, visually, a single, tiny spot that is so small, it may be visible only if you display it aga...
  • 6 .
    6 Table 2 . This policy ...
    6 Table 2 . This policy applies for HP monitors manufactured in May 2009 or later: Bright sub -pixel defects: 2 maximum Dark sub -pixel defects: 5 maximum Total sub -pixel defects: 5 maximum Full pixel defects: 0 allowed Note: the date of...
  • 7 .
    7 defects, and no sub -pi...
    7 defects, and no sub -pixel defects spaced closer than 15 mm, with a maximum of five total sub -pixel defects. Figure 2. Pixel fault definitions.
  • 8 .
    8 Defect type definitions...
    8 Defect type definitions Bright/dark dot : A sub -pixel stuck on or off. Bright spots/lines : Spots or lines that appear light in the display. Defects do not vary in size or intensity (contrast) when contrast voltage is varied. Contrast variation can b...
  • 9 .
    9 The HP advantage The H...
    9 The HP advantage The HP pixel defect specifications are part of HP's ongoing effort to provide high quality products. When it comes to LCD -TFT displays, fewer pixel defects mean bett er quality. HP quality and reliability HP prides itself on a re...
  • 10 .
    10 Development, the world...
    10 Development, the world's leading organization for quality and environme ntal certification.  Energy savings : HP LCD monitors include advanced power management features meet the U.S. Environmental Protection Agency's ENERGY STAR(R) requirements.  ...
  • 11 .
    11 For more information ...
    11 For more information For the HP sales office nearest you, please refer to your local phone directory, or call the HP regional office listed below. Corporate and North American headquarters Hewlett -Packard 3000 Hanover Street Palo Alto, CA 94304 -...