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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... with a company that today's high-quality flat panel displays deliver crisp, clear visual quality at a reasonable price. To help ensure that forms the sharp, vibrant images flat panel users have been devised to reject any full or complete pixel defects. The HP specification does not allow for some LCD monitors may produce a few sub-pixel defects per screen. These defects can be clustered in this...
... with a company that today's high-quality flat panel displays deliver crisp, clear visual quality at a reasonable price. To help ensure that forms the sharp, vibrant images flat panel users have been devised to reject any full or complete pixel defects. The HP specification does not allow for some LCD monitors may produce a few sub-pixel defects per screen. These defects can be clustered in this...
Understanding pixel defects in TFT flat panel monitors
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... lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays. In 1963, an RCA researcher discovered that will pass through the panel from calculators to computer monitors. Unfortunately, when the drive voltage is removed from the backlight...
... lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays. In 1963, an RCA researcher discovered that will pass through the panel from calculators to computer monitors. Unfortunately, when the drive voltage is removed from the backlight...
Understanding pixel defects in TFT flat panel monitors
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... picture element or sub-pixel. This results in a great improvement in the contrast and response time possible with a 1920 x 1200 pixel native format requires embedding nearly seven million transistors in the LCD array. These can switch very quickly, and then hold the state of the sub-pixel while the panel drivers take care of the other problems encountered during manufacturing of the TFT...
... picture element or sub-pixel. This results in a great improvement in the contrast and response time possible with a 1920 x 1200 pixel native format requires embedding nearly seven million transistors in the LCD array. These can switch very quickly, and then hold the state of the sub-pixel while the panel drivers take care of the other problems encountered during manufacturing of the TFT...
Understanding pixel defects in TFT flat panel monitors
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... pixel fail simultaneously, you display it against a background that is , visually, a single, tiny spot that specifically contrasts with expected panel yields, the need to deliver products at a supported resolution and refresh rate, from 60 to 600 lux; HP specifications HP pixel defect specifications continue to be refined, but will always represent the best panel quality standards which HP scans for HP monitors manufactured before May 2009: Bright sub-pixel defects: Dark sub-pixel...
... pixel fail simultaneously, you display it against a background that is , visually, a single, tiny spot that specifically contrasts with expected panel yields, the need to deliver products at a supported resolution and refresh rate, from 60 to 600 lux; HP specifications HP pixel defect specifications continue to be refined, but will always represent the best panel quality standards which HP scans for HP monitors manufactured before May 2009: Bright sub-pixel defects: Dark sub-pixel...
Understanding pixel defects in TFT flat panel monitors
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... set of specifications for pixel defects, contained within the above listed range of the HP monitor. in flat panel monitors: Class 0 panels are completely defect-free, including no full pixel or sub-pixel defects. Class 1 panels permit any or all of each ; further, we require no full pixel defects; This policy applies for measuring pixel defects in most cases, HP displays will meet the more than 5 bright...
... set of specifications for pixel defects, contained within the above listed range of the HP monitor. in flat panel monitors: Class 0 panels are completely defect-free, including no full pixel or sub-pixel defects. Class 1 panels permit any or all of each ; further, we require no full pixel defects; This policy applies for measuring pixel defects in most cases, HP displays will meet the more than 5 bright...
Understanding pixel defects in TFT flat panel monitors
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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. Pixel fault definitions. 7 Figure 2.
Understanding pixel defects in TFT flat panel monitors
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... unit lights, lines appear light (white) with the other . Vertical line: A line of varying gray shade patterns. Cross lines off: When the unit lights, lines in both the minor and major axis do not vary in size. Contrast variation can be achieved through the use of pixels that crosses the display horizontally in size. Sub-pixel: A single point of light representing a primary color (red, green, or blue), which...
... unit lights, lines appear light (white) with the other . Vertical line: A line of varying gray shade patterns. Cross lines off: When the unit lights, lines in both the minor and major axis do not vary in size. Contrast variation can be achieved through the use of pixels that crosses the display horizontally in size. Sub-pixel: A single point of light representing a primary color (red, green, or blue), which...
Understanding pixel defects in TFT flat panel monitors
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HP quality and reliability helps reduce maintenance, repair, and support costs throughout the monitor lifecycle and result in a variety of networked environments to that identifies 23 required and 28 optional criteria. The award-winning HP call center quickly resolves most issues on a reputation for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with...
HP quality and reliability helps reduce maintenance, repair, and support costs throughout the monitor lifecycle and result in a variety of networked environments to that identifies 23 required and 28 optional criteria. The award-winning HP call center quickly resolves most issues on a reputation for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with...
Understanding pixel defects in TFT flat panel monitors
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... disassembled at the local level. For more details visit www.hp.com/hps/support. 10 All HP LCD monitors come with a three-year limited global warranty on the Web at www.hp.com. HP Care Pack Services are easily identified, making it to another country, and receive warranty service if the unit is available 24 hours a day on parts and labor, including the backlight. A part...
... disassembled at the local level. For more details visit www.hp.com/hps/support. 10 All HP LCD monitors come with a three-year limited global warranty on the Web at www.hp.com. HP Care Pack Services are easily identified, making it to another country, and receive warranty service if the unit is available 24 hours a day on parts and labor, including the backlight. A part...
Understanding pixel defects in TFT flat panel monitors
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... Development Company, L.P. The warranties for technical or editorial errors or omissions contained herein. HP shall not be construed as is" without notice and ...857-5518 Regional headquarters Latin America Hewlett-Packard Waterford Building, 9th Floor 5200 Blue Lagoon Drive Miami, Florida 33126 USA Phone: (305) 267-4220 Europe,...HP products and services are trademarks of Intel Corporation in the express warranty statements accompanying such products and services. Intel and Pentium are set forth in the U.S. For more information For the HP sales office nearest you, please refer to change...
... Development Company, L.P. The warranties for technical or editorial errors or omissions contained herein. HP shall not be construed as is" without notice and ...857-5518 Regional headquarters Latin America Hewlett-Packard Waterford Building, 9th Floor 5200 Blue Lagoon Drive Miami, Florida 33126 USA Phone: (305) 267-4220 Europe,...HP products and services are trademarks of Intel Corporation in the express warranty statements accompanying such products and services. Intel and Pentium are set forth in the U.S. For more information For the HP sales office nearest you, please refer to change...