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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...and as a result, has adopted a more stringent unified standard for any complete pixel defects and minimize sub-pixel defects. What is HP doing about them, this paper. Why is because the current state-of-the-art in groups. These defects can be clustered in ...the typical flat panel screen, producing the mixture of its customers. This means better quality for the customer and ultimately greater satisfaction for some LCD monitors may produce a few sub-pixel defects per screen. To deal with a company that today's high-quality flat panel displays deliver crisp, ...
...and as a result, has adopted a more stringent unified standard for any complete pixel defects and minimize sub-pixel defects. What is HP doing about them, this paper. Why is because the current state-of-the-art in groups. These defects can be clustered in ...the typical flat panel screen, producing the mixture of its customers. This means better quality for the customer and ultimately greater satisfaction for some LCD monitors may produce a few sub-pixel defects per screen. To deal with a company that today's high-quality flat panel displays deliver crisp, ...
Understanding pixel defects in TFT flat panel monitors
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... Thin-film transistor (TFT) technology refers to a type of all HP LCD monitors as well as an active-matrix LCD (AMLCD), used to control light, by switching a voltage across the material on the voltage applied across the material. Combining red, green, and blue ...-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of liquid crystal display (LCD), also known as HP iPAQ devices and HP notebook displays. Fluorescent lights (very similar to the fluorescent tubes used in order across the screen. In the simplest...
... Thin-film transistor (TFT) technology refers to a type of all HP LCD monitors as well as an active-matrix LCD (AMLCD), used to control light, by switching a voltage across the material on the voltage applied across the material. Combining red, green, and blue ...-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of liquid crystal display (LCD), also known as HP iPAQ devices and HP notebook displays. Fluorescent lights (very similar to the fluorescent tubes used in order across the screen. In the simplest...
Understanding pixel defects in TFT flat panel monitors
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...nearly seven million transistors in the screen (1920 x 1200 x 3 = 6.91 million). Electrodes across LC material Understanding pixel defects Active-matrix TFT-LCDs require at least one of the millions of one percent (0.000014%). To look at the total number of pixels and subpixels on a 1920 x 1200... in the original Intel® Pentium® processor. The advent of the TFT array on the glass substrate cause these defects. with LCD technology, and permits the manufacture of transistors found in the panel processing, and other rows and columns of today's high-resolution WUXGA displays...
...nearly seven million transistors in the screen (1920 x 1200 x 3 = 6.91 million). Electrodes across LC material Understanding pixel defects Active-matrix TFT-LCDs require at least one of the millions of one percent (0.000014%). To look at the total number of pixels and subpixels on a 1920 x 1200... in the original Intel® Pentium® processor. The advent of the TFT array on the glass substrate cause these defects. with LCD technology, and permits the manufacture of transistors found in the panel processing, and other rows and columns of today's high-resolution WUXGA displays...
Understanding pixel defects in TFT flat panel monitors
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... and support costs throughout the monitor lifecycle and result in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with the environment in mind HP environmental policies are part of HP's ongoing effort to help ensure... reliability and long life by TCO 9 The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating ...
... and support costs throughout the monitor lifecycle and result in a high residual value for industry-standard best-of-breed products-and our line of LCD monitors is a set by testing every model with the environment in mind HP environmental policies are part of HP's ongoing effort to help ensure... reliability and long life by TCO 9 The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating ...
Understanding pixel defects in TFT flat panel monitors
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... processes to protect the ozone layer from further damage. Additional support is still in warranty. HP service and support HP LCD monitors are protected under the industry-leading HP support umbrella, which includes 65,000 sales and service professionals in one country, move it easier...requirements. Recyclability: Commonly recycled materials are also available. All HP LCD monitors come with a three-year limited global warranty on investment and reduce the loss of service and support at www.hp.com. HP Care Pack Services are easily identified, making it to find a ...
... processes to protect the ozone layer from further damage. Additional support is still in warranty. HP service and support HP LCD monitors are protected under the industry-leading HP support umbrella, which includes 65,000 sales and service professionals in one country, move it easier...requirements. Recyclability: Commonly recycled materials are also available. All HP LCD monitors come with a three-year limited global warranty on investment and reduce the loss of service and support at www.hp.com. HP Care Pack Services are easily identified, making it to find a ...
HP Display Assistant User Guide
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...ring until the tint is recommended that you will remove blue tint from Web sites and specifies a color matching technique to provide consistent monitor and output device color. Color Calibration 13 Once the process is done through a series of targets used to display images from the square...the middle square in the File tab will take about ten minutes to complete. Color Calibration The HP Display Assistant Color Calibration feature makes it possible to achieve sRGB color on your LCD. 1. The process goes through an interactive series of steps to produce sRGB color on your ...
...ring until the tint is recommended that you will remove blue tint from Web sites and specifies a color matching technique to provide consistent monitor and output device color. Color Calibration 13 Once the process is done through a series of targets used to display images from the square...the middle square in the File tab will take about ten minutes to complete. Color Calibration The HP Display Assistant Color Calibration feature makes it possible to achieve sRGB color on your LCD. 1. The process goes through an interactive series of steps to produce sRGB color on your ...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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Enhanced for Accessibility User Guide HP L1940T 19" LCD Monitor Document Part Number: 407540-001 January 2006 This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications.
Enhanced for Accessibility User Guide HP L1940T 19" LCD Monitor Document Part Number: 407540-001 January 2006 This guide provides information on setting up the monitor, installing drivers, using the on-screen display menu, troubleshooting and technical specifications.
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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... contains proprietary information that failure to change without the prior written consent of Microsoft Corporation in the U.S. HP shall not be liable for HP products and services are trademarks or registered trademarks of information. User Guide HP L1940T 19" LCD Monitor First Edition (January 2006) Document Part Number: 407540-001 Microsoft, MS-DOS, Windows, and Windows NT...
... contains proprietary information that failure to change without the prior written consent of Microsoft Corporation in the U.S. HP shall not be liable for HP products and services are trademarks or registered trademarks of information. User Guide HP L1940T 19" LCD Monitor First Edition (January 2006) Document Part Number: 407540-001 Microsoft, MS-DOS, Windows, and Windows NT...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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...the On-Screen Display 4-7 Optimizing Analog Video 4-10 Identifying Monitor Conditions 4-10 Sleep Timer Mode 4-11 HP Display LiteSaver 4-13 Installing the HP Display LiteSaver Software. . . . . 4-13 sRGB Support... 4-15 Changing the Color Temperature 4-15 Installing the sRGB ICM File for Microsoft Windows 2000 and Windows XP 4-16 A Troubleshooting Solving Common Problems A-1 Using the Worldwide Web A-3 Preparing to call Technical Support A-3 B Technical Specifications L1940T 19" LCD Monitor...
...the On-Screen Display 4-7 Optimizing Analog Video 4-10 Identifying Monitor Conditions 4-10 Sleep Timer Mode 4-11 HP Display LiteSaver 4-13 Installing the HP Display LiteSaver Software. . . . . 4-13 sRGB Support... 4-15 Changing the Color Temperature 4-15 Installing the sRGB ICM File for Microsoft Windows 2000 and Windows XP 4-16 A Troubleshooting Solving Common Problems A-1 Using the Worldwide Web A-3 Preparing to call Technical Support A-3 B Technical Specifications L1940T 19" LCD Monitor...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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Contents Disposal of Waste Equipment by Users in Private Household in the European Union C-4 Japanese Notice C-5 Korean Notice C-5 ENERGY STAR Compliance C-5 Power Cord Set Requirements C-5 Japanese Power Cord Requirements C-6 D LCD Monitor Quality and Pixel Policy User Guide v
Contents Disposal of Waste Equipment by Users in Private Household in the European Union C-4 Japanese Notice C-5 Korean Notice C-5 ENERGY STAR Compliance C-5 Power Cord Set Requirements C-5 Japanese Power Cord Requirements C-6 D LCD Monitor Quality and Pixel Policy User Guide v
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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The monitor features include: ■ 19-inch/48.3 cm viewable area display, with narrow bezels. ■ ...■ Tilt, swivel, and height adjustment capabilities. ■ Easily removable base for flexible panel mounting with the optional HP Compaq Quick Release or other panel mounting solutions. ■ Video signal inputs supported: ❏ VGA Analog ❏...ports. ■ USB cable included to connect the monitor's USB ports to the USB connector on the computer. ■ Mounting feature on bottom of monitor to accept an optional HP Speaker Bar accessory kit. User Guide 1-1 1 Product ...
The monitor features include: ■ 19-inch/48.3 cm viewable area display, with narrow bezels. ■ ...■ Tilt, swivel, and height adjustment capabilities. ■ Easily removable base for flexible panel mounting with the optional HP Compaq Quick Release or other panel mounting solutions. ■ Video signal inputs supported: ❏ VGA Analog ❏...ports. ■ USB cable included to connect the monitor's USB ports to the USB connector on the computer. ■ Mounting feature on bottom of monitor to accept an optional HP Speaker Bar accessory kit. User Guide 1-1 1 Product ...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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... Save and Return to exit the menu. The CD menu displays. 2. Operating the Monitor 13. Installing the HP Display LiteSaver Software 1. This helps protect the LCD panel against image retention. from the pop-up menu. When you to place your monitor into its low power sleep mode at predefined times by shutting down or...
... Save and Return to exit the menu. The CD menu displays. 2. Operating the Monitor 13. Installing the HP Display LiteSaver Software 1. This helps protect the LCD panel against image retention. from the pop-up menu. When you to place your monitor into its low power sleep mode at predefined times by shutting down or...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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B Technical Specifications ✎ All performance specifications are provided by the component manufacturers. L1940T 19" LCD Monitor L1940T Specifications Display Type 19.0 inches TFT LCD 48.3 cm Viewable Image Size 19.0-inch diagonal 48.3 cm Tilt Swivel --5 to 35° --90 to 90° Face Treatment Anti-glare polarizer with... 16.3 inches 477 mm 265 mm 413 mm User Guide B-1 Performance specifications represent the highest specification of all HP's component manufacturers' typical level specifications for performance and actual performance may vary either higher or lower.
B Technical Specifications ✎ All performance specifications are provided by the component manufacturers. L1940T 19" LCD Monitor L1940T Specifications Display Type 19.0 inches TFT LCD 48.3 cm Viewable Image Size 19.0-inch diagonal 48.3 cm Tilt Swivel --5 to 35° --90 to 90° Face Treatment Anti-glare polarizer with... 16.3 inches 477 mm 265 mm 413 mm User Guide B-1 Performance specifications represent the highest specification of all HP's component manufacturers' typical level specifications for performance and actual performance may vary either higher or lower.
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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Canadian Notice This Class B digital apparatus meets all requirements of -life: ■ Mercury in the fluorescent lamp in the display LCD. ■ Lead in the solder and some component leads. Materials Disposal This HP product contains the following EU Directives: ■ Low Voltage Directive 73/23/EEC ■ EMC Directive 89/336/EEC...
Canadian Notice This Class B digital apparatus meets all requirements of -life: ■ Mercury in the fluorescent lamp in the display LCD. ■ Lead in the solder and some component leads. Materials Disposal This HP product contains the following EU Directives: ■ Low Voltage Directive 73/23/EEC ■ EMC Directive 89/336/EEC...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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... dots. ■ 5 total bright and dark dots. ■ No more than two adjacent (less than a defective whole pixel and is not specific to the HP LCD. User Guide D-1 This is common to all vendors and is small and only visible on a bright background). The first is the more defective pixels or... is always turned on (a bright spot on a dark background), or it is less visible than 25 mm edge-to guarantee trouble-free performance. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to -edge) defective pixels.
... dots. ■ 5 total bright and dark dots. ■ No more than two adjacent (less than a defective whole pixel and is not specific to the HP LCD. User Guide D-1 This is common to all vendors and is small and only visible on a bright background). The first is the more defective pixels or... is always turned on (a bright spot on a dark background), or it is less visible than 25 mm edge-to guarantee trouble-free performance. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to -edge) defective pixels.
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
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HP expects that, over time, the industry will continue to improve its ability to produce LCDs with fewer cosmetic imperfections and HP will adjust guidelines as improvements are made. LCD Monitor Quality and Pixel Policy To locate defective pixels, the monitor should be viewed under normal operating conditions, in normal operating mode at a supported resolution and refresh rate, from a distance of approximately 50 cm (16 in.). D-2 User Guide
HP expects that, over time, the industry will continue to improve its ability to produce LCDs with fewer cosmetic imperfections and HP will adjust guidelines as improvements are made. LCD Monitor Quality and Pixel Policy To locate defective pixels, the monitor should be viewed under normal operating conditions, in normal operating mode at a supported resolution and refresh rate, from a distance of approximately 50 cm (16 in.). D-2 User Guide