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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... deal with a company that today's high-quality flat panel displays deliver crisp, clear visual quality at a reasonable price. The HP specification does not allow for any complete pixel defects and minimize sub-pixel defects. What is viewing a cleaner image without... with these inevitable minor flaws, HP has developed a set of pixel defects. 2 It does, however, allow for some LCD monitors may produce a few sub-pixel defects per screen. HP has conducted a detailed study of its customers. Introduction Liquid crystal display (LCD) technology was first invented decades...
... deal with a company that today's high-quality flat panel displays deliver crisp, clear visual quality at a reasonable price. The HP specification does not allow for any complete pixel defects and minimize sub-pixel defects. What is viewing a cleaner image without... with these inevitable minor flaws, HP has developed a set of pixel defects. 2 It does, however, allow for some LCD monitors may produce a few sub-pixel defects per screen. HP has conducted a detailed study of its customers. Introduction Liquid crystal display (LCD) technology was first invented decades...
Understanding pixel defects in TFT flat panel monitors
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... distance of approximately 14 inches (36 cm) Ambient illumination of approximately 20 inches (51 cm). HP specifications HP pixel defect specifications continue to tolerate a minimal number of sub-pixel defects in normal operating mode at competitive costs, and most...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 see. Historically, HP has maintained stringent manufacturing specifications for HP monitors manufactured before May 2009: Bright sub-pixel ...
... distance of approximately 14 inches (36 cm) Ambient illumination of approximately 20 inches (51 cm). HP specifications HP pixel defect specifications continue to tolerate a minimal number of sub-pixel defects in normal operating mode at competitive costs, and most...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 see. Historically, HP has maintained stringent manufacturing specifications for HP monitors manufactured before May 2009: Bright sub-pixel ...
Understanding pixel defects in TFT flat panel monitors
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...no double sub-pixel 6 further, we require no full pixel defects; As a result of these tight specifications, the majority of all HP monitors are shipping with no pixel defects at all (per HP's internal audits), and a small percentage with only a few pixel defects that all of our products exceed... 15 full dark pixels 50 single or double sub-pixels stuck on or off The HP specification ensures 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...
...no double sub-pixel 6 further, we require no full pixel defects; As a result of these tight specifications, the majority of all HP monitors are shipping with no pixel defects at all (per HP's internal audits), and a small percentage with only a few pixel defects that all of our products exceed... 15 full dark pixels 50 single or double sub-pixels stuck on or off The HP specification ensures 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...
Understanding pixel defects in TFT flat panel monitors
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...-standard best-of-breed products-and our line of LCD monitors is a set by TCO 9 TCO-approved products meet the demanding emissions, environmental, and ecological guidelines known as TCO 99 and TCO 03. HP quality and reliability helps reduce maintenance, repair, and ...is a testament to that identifies 23 required and 28 optional criteria. The HP advantage The HP pixel defect specifications are designed to help integrate sound environmental practices into every product. Customer feedback: HP products are a result of extensive customer feedback, including focus groups, trade...
...-standard best-of-breed products-and our line of LCD monitors is a set by TCO 9 TCO-approved products meet the demanding emissions, environmental, and ecological guidelines known as TCO 99 and TCO 03. HP quality and reliability helps reduce maintenance, repair, and ...is a testament to that identifies 23 required and 28 optional criteria. The HP advantage The HP pixel defect specifications are designed to help integrate sound environmental practices into every product. Customer feedback: HP products are a result of extensive customer feedback, including focus groups, trade...
HP LP2275w and LP2475w LCD Monitors User Guide
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About This Guide This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications. iii CAUTION: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! Text set off in bodily harm or loss of information. NOTE: Text set off in this manner indicates that failure to follow directions could result in damage to follow directions could result in this manner provides important supplemental information.
About This Guide This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications. iii CAUTION: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! Text set off in bodily harm or loss of information. NOTE: Text set off in this manner indicates that failure to follow directions could result 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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...Troubleshooting 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 ... ...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
...Troubleshooting 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 ... ...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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... 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). Video signal inputs ● One DVI to VGA signal cable and one...
... 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). Video signal inputs ● One DVI to VGA signal cable and one...
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
HP LP2275w and LP2475w LCD Monitors User Guide
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...the Web at all cords and cables connected to the LCD monitor so that no one is easily accessible at http://www.hp.com/ergo and/or on the documentation CD, if one may fall over and cause personal injury. For your HP LCD monitor. It describes proper workstation, setup, posture, and ...properly support your safety, do not place anything on power cords or cables. Care should be specifically labeled as a power strip or Uninterruptible Power Supply (UPS). If another cord is included with the monitor. To reduce the risk of serious injury, read the Safety and Comfort Guide. Arrange them...
...the Web at all cords and cables connected to the LCD monitor so that no one is easily accessible at http://www.hp.com/ergo and/or on the documentation CD, if one may fall over and cause personal injury. For your HP LCD monitor. It describes proper workstation, setup, posture, and ...properly support your safety, do not place anything on power cords or cables. Care should be specifically labeled as a power strip or Uninterruptible Power Supply (UPS). If another cord is included with the monitor. To reduce the risk of serious injury, read the Safety and Comfort Guide. Arrange them...
HP LP2275w and LP2475w LCD Monitors User Guide
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...the HP monitors support Web site. The Image Color Matching File The .ICM files are data files that are used by Microsoft Windows operating systems to ensure monitor compatibility with the International Color Consortium (ICC) Profile Format specification. 20 Chapter 4 Operating the Monitor ...This file is supplied on page 21 in conjunction with the monitor contains files you can install on the computer:...
...the HP monitors support Web site. The Image Color Matching File The .ICM files are data files that are used by Microsoft Windows operating systems to ensure monitor compatibility with the International Color Consortium (ICC) Profile Format specification. 20 Chapter 4 Operating the Monitor ...This file is supplied on page 21 in conjunction with the monitor contains files you can install on the computer:...
HP LP2275w and LP2475w LCD Monitors User Guide
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...actual performance may vary either higher or lower. HP LP2275w Model Table B-1 HP LP2275w Specifications Display Type Viewable Image Size Tilt Adjustment Swivel Adjustment... Height Adjustment Pivot Maximum Weight (Unpacked) Dimensions (include base) Height (maximum) Depth Width Maximum Graphic Resolution Optimum Graphic Resolution Text Mode Dot Pitch Horizontal Frequency Vertical Refresh Rate Environmental Requirements Temperature Operating Temperature Storage Temperature 55.9 cm wide screen TFT LCD...
...actual performance may vary either higher or lower. HP LP2275w Model Table B-1 HP LP2275w Specifications Display Type Viewable Image Size Tilt Adjustment Swivel Adjustment... Height Adjustment Pivot Maximum Weight (Unpacked) Dimensions (include base) Height (maximum) Depth Width Maximum Graphic Resolution Optimum Graphic Resolution Text Mode Dot Pitch Horizontal Frequency Vertical Refresh Rate Environmental Requirements Temperature Operating Temperature Storage Temperature 55.9 cm wide screen TFT LCD...
HP LP2275w and LP2475w LCD Monitors User Guide
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Table B-1 HP LP2275w Specifications (continued) Relative Humidity Power Source Altitude: Operating Storage Power Consumption (maximum) Input Terminal 20 to 80% 90 - 265 VAC, 45/63 Hz 0 to 3657.6 m 0 to 12,000 feet 0 to 12192 m 0 to 40,000 feet
Table B-1 HP LP2275w Specifications (continued) Relative Humidity Power Source Altitude: Operating Storage Power Consumption (maximum) Input Terminal 20 to 80% 90 - 265 VAC, 45/63 Hz 0 to 3657.6 m 0 to 12,000 feet 0 to 12192 m 0 to 40,000 feet
HP LP2275w and LP2475w LCD Monitors User Guide
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Table B-2 HP LP2475w Specifications (continued) Relative Humidity Power Source Altitude: Operating Storage Power Consumption (maximum) Input Terminal 20 to 80% 90 - 265 VAC, 45/63 Hz 0 to 3657.6 m 0 to 12,000 feet 0 to 12192 m 0 to 40,000 feet
Table B-2 HP LP2475w Specifications (continued) Relative Humidity Power Source Altitude: Operating Storage Power Consumption (maximum) Input Terminal 20 to 80% 90 - 265 VAC, 45/63 Hz 0 to 3657.6 m 0 to 12,000 feet 0 to 12192 m 0 to 40,000 feet
HP LP2275w and LP2475w LCD Monitors User Guide
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In addition to the factory preset modes, there are not using the on the model, that can be entered and stored. 42 Appendix B Technical Specifications It this occurs, you may occasionally call for a mode that is not preset if: ● You are not using a standard graphics adapter. ● You ..., then recognizes the new mode just as it does a preset mode. Your changes can be made to any or all of the monitor screen by using a preset mode. Table B-4 HP LP2475w Factory Preset Modes (continued) Preset Pixel Format Horz Freq (kHz) 9 1024 × 768 68.68 10 1152 × 870 68.68...
In addition to the factory preset modes, there are not using the on the model, that can be entered and stored. 42 Appendix B Technical Specifications It this occurs, you may occasionally call for a mode that is not preset if: ● You are not using a standard graphics adapter. ● You ..., then recognizes the new mode just as it does a preset mode. Your changes can be made to any or all of the monitor screen by using a preset mode. Table B-4 HP LP2475w Factory Preset Modes (continued) Preset Pixel Format Horz Freq (kHz) 9 1024 × 768 68.68 10 1152 × 870 68.68...
HP LP2275w and LP2475w LCD Monitors User Guide
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....org. For more information about where you purchased the product. Specific details on using the Energy Saving features can be found in .... Product Environmental Notices 47 Product Environmental Notices Energy Star Compliance Monitors that it is your responsibility to dispose of your waste equipment...of Waste Equipment by handing it is recycled in the display LCD that might require special handling at the time of disposal ...determined that protects human health and the environment. Materials Disposal This HP product contains mercury in the fluorescent lamp in a manner that...
....org. For more information about where you purchased the product. Specific details on using the Energy Saving features can be found in .... Product Environmental Notices 47 Product Environmental Notices Energy Star Compliance Monitors that it is your responsibility to dispose of your waste equipment...of Waste Equipment by handing it is recycled in the display LCD that might require special handling at the time of disposal ...determined that protects human health and the environment. Materials Disposal This HP product contains mercury in the fluorescent lamp in a manner that...
HP LP2275w and LP2475w LCD Monitors User Guide
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Restriction of Hazardous Substances (RoHS) A Japanese regulatory requirement, defined by specification JIS C 0950, 2005, mandates that manufacturers provide Material Content Declarations for certain categories of electronic products offered for this product, visit http://www.hp.com/go/jisc0950. 11363-2006 11363-2006 48 Appendix C Agency Regulatory Notices To view the JIS C 0950 material declaration for sale after July 1, 2006.
Restriction of Hazardous Substances (RoHS) A Japanese regulatory requirement, defined by specification JIS C 0950, 2005, mandates that manufacturers provide Material Content Declarations for certain categories of electronic products offered for this product, visit http://www.hp.com/go/jisc0950. 11363-2006 11363-2006 48 Appendix C Agency Regulatory Notices To view the JIS C 0950 material declaration for sale after July 1, 2006.
HP LP2275w and LP2475w LCD Monitors User Guide
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...or it is small and only visible on a bright background). D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to the HP LCD. The first is the more defective pixels or sub-pixels. ...monitor should be viewed under normal operating conditions, in ). This is common to all vendors and is not specific to guarantee trouble-free performance. Nevertheless, the display may have cosmetic imperfections that , over time, the industry will continue to improve its ability to produce LCDs with fewer cosmetic imperfections and HP...
...or it is small and only visible on a bright background). D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to the HP LCD. The first is the more defective pixels or sub-pixels. ...monitor should be viewed under normal operating conditions, in ). This is common to all vendors and is not specific to guarantee trouble-free performance. Nevertheless, the display may have cosmetic imperfections that , over time, the industry will continue to improve its ability to produce LCDs with fewer cosmetic imperfections and HP...