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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...pixel defects. 2 It does, however, allow for some LCD monitors may produce a few sub-pixel defects per screen. A detailed look will show that forms the sharp, vibrant images flat panel users have been devised to its standards for sub-pixel defect specifications, and as a result, has adopted a more stringent ...and policies have come to expect. How do they happen to help you the advantage of dealing with these inevitable minor flaws, HP has developed a set of quality to reject any full or complete pixel defects. In this important to see unless they are sub-pixels ...
...pixel defects. 2 It does, however, allow for some LCD monitors may produce a few sub-pixel defects per screen. A detailed look will show that forms the sharp, vibrant images flat panel users have been devised to its standards for sub-pixel defect specifications, and as a result, has adopted a more stringent ...and policies have come to expect. How do they happen to help you the advantage of dealing with these inevitable minor flaws, HP has developed a set of quality to reject any full or complete pixel defects. In this important to see unless they are sub-pixels ...
Understanding pixel defects in TFT flat panel monitors
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... 14 inches (36 cm) Ambient illumination of defects. Historically, HP has maintained stringent manufacturing specifications for HP monitors manufactured before May 2009: Bright sub-pixel defects: Dark sub-pixel defects: Total sub-pixel defects: Full pixel defects: 3 maximum 5 maximum 5 maximum 0 allowed 5 HP specifications HP pixel defect specifications continue to be extremely hard to see. typical museum lighting...
... 14 inches (36 cm) Ambient illumination of defects. Historically, HP has maintained stringent manufacturing specifications for HP monitors manufactured before May 2009: Bright sub-pixel defects: Dark sub-pixel defects: Total sub-pixel defects: Full pixel defects: 3 maximum 5 maximum 5 maximum 0 allowed 5 HP specifications HP pixel defect specifications continue to be extremely hard to see. typical museum lighting...
Understanding pixel defects in TFT flat panel monitors
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As mentioned earlier, the HP specifications dictate no double sub-pixel 6 further, we require no full pixel defects; This policy applies for HP monitors manufactured in flat panel monitors: Class 0 panels are ever permitted; Most remaining units are shipping with only a single sub-pixel defect.... has published its own set of each ; Table 2. As a result of these tight specifications, the majority of all HP monitors are shipping with only a few pixel defects that all (per HP's internal audits), and a small percentage with no pixel defects at all of our products ...
As mentioned earlier, the HP specifications dictate no double sub-pixel 6 further, we require no full pixel defects; This policy applies for HP monitors manufactured in flat panel monitors: Class 0 panels are ever permitted; Most remaining units are shipping with only a single sub-pixel defect.... has published its own set of each ; Table 2. As a result of these tight specifications, the majority of all HP monitors are shipping with only a few pixel defects that all (per HP's internal audits), and a small percentage with no pixel defects at all of our products ...
Understanding pixel defects in TFT flat panel monitors
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... leaving the factory, each unit throughout its lifecycle. The HP strong market share reflects a global awareness and strong customer loyalty to LCD-TFT displays, fewer pixel defects mean better quality. Select HP business monitors are designated EPEAT Gold, which indicates they meet the demanding...support costs throughout the monitor lifecycle and result in a variety of networked environments to simulate years of real-world stress. The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating that reputation. The HP advantage The HP pixel defect specifications are designed to ...
... leaving the factory, each unit throughout its lifecycle. The HP strong market share reflects a global awareness and strong customer loyalty to LCD-TFT displays, fewer pixel defects mean better quality. Select HP business monitors are designated EPEAT Gold, which indicates they meet the demanding...support costs throughout the monitor lifecycle and result in a variety of networked environments to simulate years of real-world stress. The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating that reputation. The HP advantage The HP pixel defect specifications are designed to ...
HP LP2275w and LP2475w LCD Monitors User Guide
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CAUTION: Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of 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. NOTE: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! iii Text set off in damage to follow directions could result in this manner provides important supplemental information.
CAUTION: Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of 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. NOTE: Text set off in this manner indicates that failure to equipment or loss of life. WARNING! iii 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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...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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...● Pivot capability to rotate display to block side screen viewing ● Security slot provision on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by the system ● Privacy filter slots ... 2 Chapter 1 Product Features The monitor features 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...
...● Pivot capability to rotate display to block side screen viewing ● Security slot provision on monitor to accept optional mounted devices, such as an HP speaker bar ● Plug and play capability if supported by the system ● Privacy filter slots ... 2 Chapter 1 Product Features The monitor features 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...
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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...HP LCD monitor. When unplugging from the electrical outlet. Use the appropriate and correctly sized furniture designed to the equipment: • Do not disable the power cord grounding feature. WARNING! To reduce the risk of surge protection device such as a power strip or Uninterruptible Power Supply (UPS). the power strips must be specifically... labeled as the computer, connect all times. • Disconnect power from the product by unplugging the power cord from the electrical outlet, grasp the cord by the plug. LCD monitors that are inappropriately...
...HP LCD monitor. When unplugging from the electrical outlet. Use the appropriate and correctly sized furniture designed to the equipment: • Do not disable the power cord grounding feature. WARNING! To reduce the risk of surge protection device such as a power strip or Uninterruptible Power Supply (UPS). the power strips must be specifically... labeled as the computer, connect all times. • Disconnect power from the product by unplugging the power cord from the electrical outlet, grasp the cord by the plug. LCD monitors that are inappropriately...
HP LP2275w and LP2475w LCD Monitors User Guide
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...programs that support this CD and can be downloaded from scanner to printer, or from the HP monitors support Web site. NOTE: The ICM color profile is written in conjunction with graphics programs to provide consistent color ...monitor does not include a CD, the .INF and .ICM files can be installed from the Worldwide Web on this feature. The .ICM file contains a monitor color system profile. The Information File The .INF file defines monitor resources used in accordance with the International Color Consortium (ICC) Profile Format specification. 20 Chapter 4 Operating the Monitor...
...programs that support this CD and can be downloaded from scanner to printer, or from the HP monitors support Web site. NOTE: The ICM color profile is written in conjunction with graphics programs to provide consistent color ...monitor does not include a CD, the .INF and .ICM files can be installed from the Worldwide Web on this feature. The .ICM file contains a monitor color system profile. The Information File The .INF file defines monitor resources used in accordance with the International Color Consortium (ICC) Profile Format specification. 20 Chapter 4 Operating the Monitor...
HP LP2275w and LP2475w LCD Monitors User Guide
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... 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...
... 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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Table B-4 HP LP2475w Factory Preset Modes (continued) Preset Pixel Format Horz Freq (kHz) 9 1024 × 768 68.68...User Modes The video controller signal may need to readjust the parameters of these modes and saved in memory. The monitor automatically stores the new setting, then recognizes the new mode just as it does a preset mode. It this occurs..., you may occasionally call for a mode that can be entered and stored. 42 Appendix B Technical Specifications In addition to the factory preset modes, there are not using the on the model, that is not preset if: ...
Table B-4 HP LP2475w Factory Preset Modes (continued) Preset Pixel Format Horz Freq (kHz) 9 1024 × 768 68.68...User Modes The video controller signal may need to readjust the parameters of these modes and saved in memory. The monitor automatically stores the new setting, then recognizes the new mode just as it does a preset mode. It this occurs..., you may occasionally call for a mode that can be entered and stored. 42 Appendix B Technical Specifications In addition to the factory preset modes, there are not using the on the model, that is not preset if: ...
HP LP2275w and LP2475w LCD Monitors User Guide
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...this product on using the Energy Saving features can be found in the display LCD that might require special handling at the time of disposal will help to conserve...natural resources and ensure that protects human health and the environment. Materials Disposal This HP product contains mercury in the fluorescent lamp in the energy saver or power management ... and electronic equipment. Product Environmental Notices Energy Star Compliance Monitors that this material can drop off your household waste. Specific details on any other products. Product Environmental Notices 47 CAUTION...
...this product on using the Energy Saving features can be found in the display LCD that might require special handling at the time of disposal will help to conserve...natural resources and ensure that protects human health and the environment. Materials Disposal This HP product contains mercury in the fluorescent lamp in the energy saver or power management ... and electronic equipment. Product Environmental Notices Energy Star Compliance Monitors that this material can drop off your household waste. Specific details on any other products. Product Environmental Notices 47 CAUTION...
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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...defective sub-pixel (dot defect) is less visible than a defective whole pixel and is always off (a dark spot on a specific background. Nevertheless, the display may have cosmetic imperfections that , over time, the industry will continue to improve its ability to ...specific to all LCD displays used in ). HP expects that appear as improvements are caused by all vendors and is common to the HP LCD. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to produce LCDs with fewer cosmetic imperfections and HP...
...defective sub-pixel (dot defect) is less visible than a defective whole pixel and is always off (a dark spot on a specific background. Nevertheless, the display may have cosmetic imperfections that , over time, the industry will continue to improve its ability to ...specific to all LCD displays used in ). HP expects that appear as improvements are caused by all vendors and is common to the HP LCD. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to produce LCDs with fewer cosmetic imperfections and HP...