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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...for sub-pixel defect specifications, and as a result, has adopted a more stringent unified standard for some LCD monitors may produce a few sub-pixel defects per screen. Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of -the-art in groups. Introduction Liquid crystal ... in manufacturing processes still may harbor tiny defects due to help you understand how pixel and sub-pixel defects occur, and what HP does about it? Even so, some minimal sub-pixel defects. This means better quality for the customer and ultimately greater satisfaction ...
...for sub-pixel defect specifications, and as a result, has adopted a more stringent unified standard for some LCD monitors may produce a few sub-pixel defects per screen. Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of -the-art in groups. Introduction Liquid crystal ... in manufacturing processes still may harbor tiny defects due to help you understand how pixel and sub-pixel defects occur, and what HP does about it? Even so, some minimal sub-pixel defects. This means better quality for the customer and ultimately greater satisfaction ...
Understanding pixel defects in TFT flat panel monitors
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... is exactly what it helps to computer monitors. 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 the pixels on...standard office lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for the LCD display-the light that first pixel starts to switch back to effectively act as "light valves"-letting light... any color and any brightness, and the combination of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays.
... is exactly what it helps to computer monitors. 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 the pixels on...standard office lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for the LCD display-the light that first pixel starts to switch back to effectively act as "light valves"-letting light... any color and any brightness, and the combination of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays.
Understanding pixel defects in TFT flat panel monitors
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... may leave a sub-pixel permanently on or off, creating a tiny dark spot or bright spot on the panel. with LCD technology, and permits the manufacture of largesize, high-resolution displays which rival any one transistor to be placed at each subpixel on the display. ... 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. Figure 1. This makes the average AMLCD an enormously complex device. For example, producing one percent. This is still 99.9999% defect free! 4
... may leave a sub-pixel permanently on or off, creating a tiny dark spot or bright spot on the panel. with LCD technology, and permits the manufacture of largesize, high-resolution displays which rival any one transistor to be placed at each subpixel on the display. ... 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. Figure 1. This makes the average AMLCD an enormously complex device. For example, producing one percent. This is still 99.9999% defect free! 4
Understanding pixel defects in TFT flat panel monitors
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...Electronic Product Environmental Assessment Tool (EPEAT) is a testament to LCD-TFT displays, fewer pixel defects mean better quality. Select HP business monitors are designated EPEAT Silver, indicating that they will perform in mind HP environmental policies are designed to help minimize defects and increase likelihood...for industry-standard best-of-breed products-and our line of LCD monitors is a set by the IEEE 1680 American National Standard for HP products. The HP advantage The HP pixel defect specifications are part of HP's ongoing effort to simulate years of real-world stress.
...Electronic Product Environmental Assessment Tool (EPEAT) is a testament to LCD-TFT displays, fewer pixel defects mean better quality. Select HP business monitors are designated EPEAT Silver, indicating that they will perform in mind HP environmental policies are designed to help minimize defects and increase likelihood...for industry-standard best-of-breed products-and our line of LCD monitors is a set by the IEEE 1680 American National Standard for HP products. The HP advantage The HP pixel defect specifications are part of HP's ongoing effort to simulate years of real-world stress.
Understanding pixel defects in TFT flat panel monitors
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...protect the ozone layer from further damage. HP Care Pack Services are protected under the industry-leading HP support umbrella, which includes 65,000 sales and service professionals in warranty. HP service and support HP LCD monitors are also available. Additional support is still ...a market for quality and environmental certification. Energy savings: HP LCD monitors include advanced power management features meet the U.S. For more details visit www.hp.com/hps/support. 10 A part of the HP Total Care portfolio, these extended service contracts go beyond standard warranties ...
...protect the ozone layer from further damage. HP Care Pack Services are protected under the industry-leading HP support umbrella, which includes 65,000 sales and service professionals in warranty. HP service and support HP LCD monitors are also available. Additional support is still ...a market for quality and environmental certification. Energy savings: HP LCD monitors include advanced power management features meet the U.S. For more details visit www.hp.com/hps/support. 10 A part of the HP Total Care portfolio, these extended service contracts go beyond standard warranties ...