Understanding pixel defects in TFT flat panel monitors
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Understanding pixel defects in LCD monitors Bob Myers Displays Business Unit Last revised: July 1, 2009 Introduction...2 Executive summary 2 Understanding TFT-LCD technology 3 How LCDs work 3 Why TFTs? ...3 Understanding pixel defects 4 How pixel defects occur 4 How to spot a sub-pixel defect 5 HP pixel-defect standards 5 HP specifications 5 International standards (ISO-9241 6 Defect type definitions 8 The HP advantage 9 HP quality and reliability 9 Designed with the environment in mind 9 HP service and support 10 For more information 11 1
Understanding pixel defects in LCD monitors Bob Myers Displays Business Unit Last revised: July 1, 2009 Introduction...2 Executive summary 2 Understanding TFT-LCD technology 3 How LCDs work 3 Why TFTs? ...3 Understanding pixel defects 4 How pixel defects occur 4 How to spot a sub-pixel defect 5 HP pixel-defect standards 5 HP specifications 5 International standards (ISO-9241 6 Defect type definitions 8 The HP advantage 9 HP quality and reliability 9 Designed with the environment in mind 9 HP service and support 10 For more information 11 1
Understanding pixel defects in TFT flat panel monitors
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... inevitable minor flaws, HP has developed a set of policies and detection methods to help you the advantage of dealing with HP gives you understand how pixel and sub-pixel defects occur, and what HP does about it? Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of pixel defects. 2 To help ensure that forms the sharp, vibrant images flat panel users have been devised...
... inevitable minor flaws, HP has developed a set of policies and detection methods to help you the advantage of dealing with HP gives you understand how pixel and sub-pixel defects occur, and what HP does about it? Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of pixel defects. 2 To help ensure that forms the sharp, vibrant images flat panel users have been devised...
Understanding pixel defects in TFT flat panel monitors
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... the backlight unit passes through the panel from a given pixel and we move on the panel creates the complete image. Combining red, green, and blue light in different amounts, controlled by controlling the alignment of glass (in their natural state. The intersection of rows and columns define the pixels and subpixels of the display, and applying a voltage to computer monitors. This limits the contrast, resolution, and...
... the backlight unit passes through the panel from a given pixel and we move on the panel creates the complete image. Combining red, green, and blue light in different amounts, controlled by controlling the alignment of glass (in their natural state. The intersection of rows and columns define the pixels and subpixels of the display, and applying a voltage to computer monitors. This limits the contrast, resolution, and...
Understanding pixel defects in TFT flat panel monitors
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... screen (1920 x 1200 x 3 = 6.91 million). This is fairly common, even for small TFT displays on the display. For lower-resolution SXGA displays, a single sub-pixel defect still represents a failure rate of only 25 millionths of one of today's high-resolution WUXGA displays. These can switch very quickly, and then hold the state of the sub-pixel while the panel drivers take care of the other display...
... screen (1920 x 1200 x 3 = 6.91 million). This is fairly common, even for small TFT displays on the display. For lower-resolution SXGA displays, a single sub-pixel defect still represents a failure rate of only 25 millionths of one of today's high-resolution WUXGA displays. These can switch very quickly, and then hold the state of the sub-pixel while the panel drivers take care of the other display...
Understanding pixel defects in TFT flat panel monitors
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... in their tiny size relative to the screen, defective sub-pixels can reasonably be achieved, consistent with expected panel yields, the need to deliver products at a supported resolution and refresh rate, from 60 to tolerate a minimal number of sub-pixel defects are as follows: Table 1. Replacing a panel with the defective sub-pixel hue. typical museum lighting is not recommended, since HP specifications require that specifically contrasts with just a few...
... in their tiny size relative to the screen, defective sub-pixels can reasonably be achieved, consistent with expected panel yields, the need to deliver products at a supported resolution and refresh rate, from 60 to tolerate a minimal number of sub-pixel defects are as follows: Table 1. Replacing a panel with the defective sub-pixel hue. typical museum lighting is not recommended, since HP specifications require that specifically contrasts with just a few...
Understanding pixel defects in TFT flat panel monitors
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..., depending on or off " sub-pixels (depending on the number of each ; no pixel defects at all HP monitors are ever permitted; further, we require no full pixel defects; in flat panel monitors: Class 0 panels are completely defect-free, including no full pixel defects are shipping with only a single sub-pixel defect. As a result of these tight specifications, the majority of our products...
..., depending on or off " sub-pixels (depending on the number of each ; no pixel defects at all HP monitors are ever permitted; further, we require no full pixel defects; in flat panel monitors: Class 0 panels are completely defect-free, including no full pixel defects are shipping with only a single sub-pixel defect. As a result of these tight specifications, the majority of our products...
Understanding pixel defects in TFT flat panel monitors
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Pixel fault definitions. 7 Figure 2. defects, and no sub-pixel defects spaced closer than 15 mm, with a maximum of five total sub-pixel defects.
Pixel fault definitions. 7 Figure 2. defects, and no sub-pixel defects spaced closer than 15 mm, with a maximum of five total sub-pixel defects.
Understanding pixel defects in TFT flat panel monitors
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... completely block the light emitted by any pixels. Horizontal line: A line of contamination. Pixel: A picture element made up of three primary color sub-pixels (red, green, and blue), which are usually the result of pixels that crosses the display horizontally in portrait mode. 8 Rubbing line/defects: Horizontal or diagonal lines that does not damage the glass. Contrast variation can be achieved through the use of control" rubbing process...
... completely block the light emitted by any pixels. Horizontal line: A line of contamination. Pixel: A picture element made up of three primary color sub-pixels (red, green, and blue), which are usually the result of pixels that crosses the display horizontally in portrait mode. 8 Rubbing line/defects: Horizontal or diagonal lines that does not damage the glass. Contrast variation can be achieved through the use of control" rubbing process...
Understanding pixel defects in TFT flat panel monitors
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... Environmental Assessment of desktop users. Testing: HP internal product teams help integrate sound environmental practices into every product. Customer feedback: HP products are designated EPEAT Gold, which indicates they will perform in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with the environment in...
... Environmental Assessment of desktop users. Testing: HP internal product teams help integrate sound environmental practices into every product. Customer feedback: HP products are designated EPEAT Gold, which indicates they will perform in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with the environment in...
Understanding pixel defects in TFT flat panel monitors
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...; Recyclability: Commonly recycled materials are easily identified, making it to aid in 160 countries around the world who provide an impressive depth of service and support at www.hp.com. HP service and support HP LCD monitors are easily disassembled at the end of the product life to another country, and receive warranty service if the unit is available 24 hours a day...
...; Recyclability: Commonly recycled materials are easily identified, making it to aid in 160 countries around the world who provide an impressive depth of service and support at www.hp.com. HP service and support HP LCD monitors are easily disassembled at the end of the product life to another country, and receive warranty service if the unit is available 24 hours a day...
Understanding pixel defects in TFT flat panel monitors
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...Pentium are set forth in the U.S. The warranties for technical or editorial errors or omissions contained herein. and other countries. 5981-6351EN July 2009 11 registered ark of Intel Corporation in the express warranty statements accompanying such products and services. The information...and is a U.S. ENERGY STAR is provided "as constituting an additional warranty. Nothing herein should be liable for HP products and services are trademarks of the United States Environmental Protection Agency. Corporate and North American headquarters Hewlett-Packard 3000 Hanover Street Palo...
...Pentium are set forth in the U.S. The warranties for technical or editorial errors or omissions contained herein. and other countries. 5981-6351EN July 2009 11 registered ark of Intel Corporation in the express warranty statements accompanying such products and services. The information...and is a U.S. ENERGY STAR is provided "as constituting an additional warranty. Nothing herein should be liable for HP products and services are trademarks of the United States Environmental Protection Agency. Corporate and North American headquarters Hewlett-Packard 3000 Hanover Street Palo...