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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...still may harbor tiny defects due to the extreme complexity of the manufacturing process. HP has conducted a detailed study of pixel defects. 2 In this important to me? Introduction Liquid crystal display (LCD) technology was first invented decades ago and has been improving ever since-to the... to its standards 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. The HP specification does not allow for all models, which is discussed in greater detail later in groups.
...still may harbor tiny defects due to the extreme complexity of the manufacturing process. HP has conducted a detailed study of pixel defects. 2 In this important to me? Introduction Liquid crystal display (LCD) technology was first invented decades ago and has been improving ever since-to the... to its standards 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. The HP specification does not allow for all models, which is discussed in greater detail later in groups.
Understanding pixel defects in TFT flat panel monitors
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... 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. Fluorescent lights (very similar to a solid crystal. The light from the backlight unit passes through the panel from a given pixel...
... 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. Fluorescent lights (very similar to a solid crystal. The light from the backlight unit passes through the panel from a given pixel...
Understanding pixel defects in TFT flat panel monitors
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...a tiny dark spot or bright spot on a 1920 x 1200 display, we look at the total number of the TFT array on handheld computers. with LCD technology, and permits the manufacture of largesize, high-resolution displays which rival any one transistor to be placed at each picture element or sub-pixel...For lower-resolution SXGA displays, a single sub-pixel defect still represents a failure rate of only 25 millionths of one of transistors found in the LCD array. This is a very low failure rate indeed-only about 14 millionths of one sub-pixel out of the 6.91 million is more than double...
...a tiny dark spot or bright spot on a 1920 x 1200 display, we look at the total number of the TFT array on handheld computers. with LCD technology, and permits the manufacture of largesize, high-resolution displays which rival any one transistor to be placed at each picture element or sub-pixel...For lower-resolution SXGA displays, a single sub-pixel defect still represents a failure rate of only 25 millionths of one of transistors found in the LCD array. This is a very low failure rate indeed-only about 14 millionths of one sub-pixel out of the 6.91 million is more than double...
Understanding pixel defects in TFT flat panel monitors
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...against a background that specifically contrasts with the defective sub-pixel hue. 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 ...to 110 degrees horizontal and 80 to 100 degrees vertical HP pixel-defect standards Since some degree of sub-pixel defects are as follows: Table 1. A defect in a single area. To locate defective sub-pixels, the monitor should be easier to spot than defective red or blue...
...against a background that specifically contrasts with the defective sub-pixel hue. 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 ...to 110 degrees horizontal and 80 to 100 degrees vertical HP pixel-defect standards Since some degree of sub-pixel defects are as follows: Table 1. A defect in a single area. To locate defective sub-pixels, the monitor should be easier to spot than defective red or blue...
Understanding pixel defects in TFT flat panel monitors
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... audits), and a small percentage with only a few pixel defects that fall within the ISO 9241 set of specifications for HP monitors manufactured in May 2009 or later: Bright sub-pixel defects: Dark sub-pixel defects: Total sub-pixel defects: Full pixel defects: 2 maximum 5 maximum ...are ever permitted; As a result of these tight specifications, the majority of all HP monitors are shipping with no pixel defects at all of the HP monitor. These identify three classes for measuring pixel defects in most cases, HP displays will meet the more than 5 bright ("stuck on the back of our ...
... audits), and a small percentage with only a few pixel defects that fall within the ISO 9241 set of specifications for HP monitors manufactured in May 2009 or later: Bright sub-pixel defects: Dark sub-pixel defects: Total sub-pixel defects: Full pixel defects: 2 maximum 5 maximum ...are ever permitted; As a result of these tight specifications, the majority of all HP monitors are shipping with no pixel defects at all of the HP monitor. These identify three classes for measuring pixel defects in most cases, HP displays will meet the more than 5 bright ("stuck on the back of our ...
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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Contrast variation can be achieved through the use of varying gray shade patterns. Cluster: A group of defective sub-pixels which are usually the result of varying gray shade patterns. Defects do not vary in close proximity to each other two primary color sub-pixels to the polarizer that appear light in the minor (vertical) or major (horizontal) axis appear dim, but not completely on or off . Dim line: When the unit lights, line(s) in the display. Mottling: When the unit lights, variation/non-uniformity (splotchiness) appears light (white) with the display and might vary in size...
Contrast variation can be achieved through the use of varying gray shade patterns. Cluster: A group of defective sub-pixels which are usually the result of varying gray shade patterns. Defects do not vary in close proximity to each other two primary color sub-pixels to the polarizer that appear light in the minor (vertical) or major (horizontal) axis appear dim, but not completely on or off . Dim line: When the unit lights, line(s) in the display. Mottling: When the unit lights, variation/non-uniformity (splotchiness) appears light (white) with the display and might vary in size...
Understanding pixel defects in TFT flat panel monitors
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.... Engineering excellence: HP quality does not stop at least 14 of innovative and competitively priced products. Designed with hundreds of third-party devices in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set of voluntary... environmental performance criteria established by the IEEE 1680 American National Standard for the Environmental Assessment of strict new requirements set by TCO 9 HP quality and reliability HP prides itself on the first call ...
.... Engineering excellence: HP quality does not stop at least 14 of innovative and competitively priced products. Designed with hundreds of third-party devices in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set of voluntary... environmental performance criteria established by the IEEE 1680 American National Standard for the Environmental Assessment of strict new requirements set by TCO 9 HP quality and reliability HP prides itself on the first call ...
Understanding pixel defects in TFT flat panel monitors
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... to protect the ozone layer from further damage. HP service and support HP LCD monitors are also available. Environmental Protection Agency's ENERGY STAR® requirements. Recyclability: Commonly recycled materials 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...
... to protect the ozone layer from further damage. HP service and support HP LCD monitors are also available. Environmental Protection Agency's ENERGY STAR® requirements. Recyclability: Commonly recycled materials 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...
Understanding pixel defects in TFT flat panel monitors
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... Route du Nant-d'Avril 150 CH-1217 Meyrin 2 Geneva, Switzerland Phone: (41 22) 780-8111 Asia Pacific Hewlett-Packard Asia Pacific Ltd. HP shall not be construed as is" without warranty of any kind. The information contained herein is subject to your local phone directory, or call ...or editorial errors or omissions contained herein. ENERGY STAR is a U.S. and other countries. 5981-6351EN July 2009 11 For more information For the HP sales office nearest you, please refer to change without notice and is provided "as constituting an additional warranty. registered ark of the United States ...
... Route du Nant-d'Avril 150 CH-1217 Meyrin 2 Geneva, Switzerland Phone: (41 22) 780-8111 Asia Pacific Hewlett-Packard Asia Pacific Ltd. HP shall not be construed as is" without warranty of any kind. The information contained herein is subject to your local phone directory, or call ...or editorial errors or omissions contained herein. ENERGY STAR is a U.S. and other countries. 5981-6351EN July 2009 11 For more information For the HP sales office nearest you, please refer to change without notice and is provided "as constituting an additional warranty. registered ark of the United States ...
HP LP2275w and LP2475w LCD Monitors User Guide
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HP LP2275w and LP2475w LCD Monitors User Guide
HP LP2275w and LP2475w LCD Monitors User Guide
HP LP2275w and LP2475w LCD Monitors User Guide
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The information in connection with the furnishing, performance, or use of this material. No part of this document is subject to another language without notice. Hewlett-Packard Company shall not be trademarks of merchantability and fitness for incidental or consequential damages in this document may be liable for technical or editorial errors or omissions contained herein or for a particular purpose, and is provided "as constituting an additional warranty. This document contains proprietary information that is " without warranty of any kind, including, but not limited to...
The information in connection with the furnishing, performance, or use of this material. No part of this document is subject to another language without notice. Hewlett-Packard Company shall not be trademarks of merchantability and fitness for incidental or consequential damages in this document may be liable for technical or editorial errors or omissions contained herein or for a particular purpose, and is provided "as constituting an additional warranty. This document contains proprietary information that is " without warranty of any kind, including, but not limited to...
HP LP2275w and LP2475w LCD Monitors User Guide
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iii About This Guide This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications. Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of information. CAUTION: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! NOTE: Text set off in damage to follow directions could result in this manner provides important supplemental information.
iii About This Guide This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications. Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of information. CAUTION: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! NOTE: Text set off in damage to follow directions could result in this manner provides important supplemental information.
HP LP2275w and LP2475w LCD Monitors User Guide
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... the Monitor Software and Utilities ...20 The Information File ...20 The Image Color Matching File 20 Installing the .INF and .ICM Files ...21 Installing from the CD ...21 Downloading from the Worldwide Web 21 Using the Auto-Adjustment Function 22 Front Panel Controls ...23 HP LP2275w Model ...23 HP LP2475w Model ...24 Adjusting the Monitor Settings...
... the Monitor Software and Utilities ...20 The Information File ...20 The Image Color Matching File 20 Installing the .INF and .ICM Files ...21 Installing from the CD ...21 Downloading from the Worldwide Web 21 Using the Auto-Adjustment Function 22 Front Panel Controls ...23 HP LP2275w Model ...23 HP LP2475w Model ...24 Adjusting the Monitor Settings...
HP LP2275w and LP2475w LCD Monitors User Guide
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... Solving Common Problems ...35 Using the Worldwide Web ...37 Preparing to Call Technical Support 37 Appendix B Technical Specifications HP LP2275w Model ...38 HP LP2475w Model ...39 Recognizing Preset Display Resolutions 41 HP LP2275w Model ...41 HP LP2475w Model ...41 Entering User Modes ...42 Energy Saver Feature ...43 Appendix C Agency Regulatory Notices Federal Communications Commission Notice... Disposal ...47 Disposal of Waste Equipment by Users in Private Household in the European Union ...47 Restriction of Hazardous Substances (RoHS 48 Appendix D LCD Monitor Quality and Pixel Policy vi
... Solving Common Problems ...35 Using the Worldwide Web ...37 Preparing to Call Technical Support 37 Appendix B Technical Specifications HP LP2275w Model ...38 HP LP2475w Model ...39 Recognizing Preset Display Resolutions 41 HP LP2275w Model ...41 HP LP2475w Model ...41 Entering User Modes ...42 Energy Saver Feature ...43 Appendix C Agency Regulatory Notices Federal Communications Commission Notice... Disposal ...47 Disposal of Waste Equipment by Users in Private Household in the European Union ...47 Restriction of Hazardous Substances (RoHS 48 Appendix D LCD Monitor Quality and Pixel Policy vi
HP LP2275w and LP2475w LCD Monitors User Guide
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...USB devices) ports ● USB cable included to connect the monitor's USB hub to the USB connector on the computer ● Accessory rail on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by...Software and documentation CD that includes HP Display Assistant, Pivot Pro software, monitor driver software, and product documentation ● Energy saver feature to meet requirements for reduced power consumption HP LP2275w Model 1 1 Product Features HP LP2275w Model The LCD (liquid crystal display) monitor has an active matrix, thin-...
...USB devices) ports ● USB cable included to connect the monitor's USB hub to the USB connector on the computer ● Accessory rail on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by...Software and documentation CD that includes HP Display Assistant, Pivot Pro software, monitor driver software, and product documentation ● Energy saver feature to meet requirements for reduced power consumption HP LP2275w Model 1 1 Product Features HP LP2275w Model The LCD (liquid crystal display) monitor has an active matrix, thin-...
HP LP2275w and LP2475w LCD Monitors User Guide
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... include: ● Large 60.96 cm (24-inch) diagonal viewable area display with the following regulated specifications: ◦ European Union CE Directives ◦ Swedish MPR II 1990 HP LP2475w Model The LCD (liquid crystal display) monitor has an active matrix, thin-film transistor (TFT). screen support for lower ... to USB devices) ports ● USB cable included to connect the monitor's USB hub to the USB connector on the computer ● Accessory rail on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by the system...
... include: ● Large 60.96 cm (24-inch) diagonal viewable area display with the following regulated specifications: ◦ European Union CE Directives ◦ Swedish MPR II 1990 HP LP2475w Model The LCD (liquid crystal display) monitor has an active matrix, thin-film transistor (TFT). screen support for lower ... to USB devices) ports ● USB cable included to connect the monitor's USB hub to the USB connector on the computer ● Accessory rail on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by the system...
HP LP2275w and LP2475w LCD Monitors User Guide
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● Software and documentation CD that includes HP Display Assistant, Pivot Pro software, monitor driver software, and product documentation ● Energy saver feature to meet requirements for reduced power consumption ● AssetControl ● Compliant with the following regulated specifications: ◦ European Union CE Directives ◦ Swedish MPR II 1990 ◦ Swedish TCO Requirements ◦ Energy Star HP LP2475w Model 3
● Software and documentation CD that includes HP Display Assistant, Pivot Pro software, monitor driver software, and product documentation ● Energy saver feature to meet requirements for reduced power consumption ● AssetControl ● Compliant with the following regulated specifications: ◦ European Union CE Directives ◦ Swedish MPR II 1990 ◦ Swedish TCO Requirements ◦ Energy Star HP LP2475w Model 3