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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... been devised 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. This means better quality for the customer and ultimately greater satisfaction for any complete pixel... defects and minimize sub-pixel defects. What is HP doing about them, this case, no full or complete pixel defects, and fewer sub-pixel defects than most competitors. Even so, some...
... been devised 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. This means better quality for the customer and ultimately greater satisfaction for any complete pixel... defects and minimize sub-pixel defects. What is HP doing about them, this case, no full or complete pixel defects, and fewer sub-pixel defects than most competitors. Even so, some...
Understanding pixel defects in TFT flat panel monitors
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...material on the panel creates the complete image. The light from the backlight unit passes through the panel from calculators to computer monitors. Unfortunately, when the drive voltage is generated by the voltage applied across the screen. In 1963, an RCA researcher discovered that...) 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. If the panel is driven such that particular intersection. Fluorescent lights (very similar to the fluorescent tubes...
...material on the panel creates the complete image. The light from the backlight unit passes through the panel from calculators to computer monitors. Unfortunately, when the drive voltage is generated by the voltage applied across the screen. In 1963, an RCA researcher discovered that...) 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. If the panel is driven such that particular intersection. Fluorescent lights (very similar to the fluorescent tubes...
Understanding pixel defects in TFT flat panel monitors
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... a supported resolution and refresh rate, from 60 to encounter this situation. 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 defects:... to spot when they are also easier to detect the resulting light or dark pixel. To locate defective sub-pixels, the monitor should be viewed under which can reasonably be achieved, consistent with the defective sub-pixel hue. typical museum lighting is so small...
... a supported resolution and refresh rate, from 60 to encounter this situation. 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 defects:... to spot when they are also easier to detect the resulting light or dark pixel. To locate defective sub-pixels, the monitor should be viewed under which can reasonably be achieved, consistent with the defective sub-pixel hue. typical museum lighting is so small...
Understanding pixel defects in TFT flat panel monitors
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... standards (ISO-9241) The International Standards Organization (ISO) has published its own set of acceptable pixel defects. These identify three classes 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 5 maximum 0 allowed Note: the date of manufacture is on the label on the number of the HP monitor. in flat panel monitors: Class 0 panels are completely defect-free, including no pixel defects at all of the following : 1 full bright...
... standards (ISO-9241) The International Standards Organization (ISO) has published its own set of acceptable pixel defects. These identify three classes 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 5 maximum 0 allowed Note: the date of manufacture is on the label on the number of the HP monitor. in flat panel monitors: Class 0 panels are completely defect-free, including no pixel defects at all of the following : 1 full bright...
Understanding pixel defects in TFT flat panel monitors
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... repair, 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 designed to help ensure... reliability and long life by TCO 9 Select HP business monitors are a result of extensive customer feedback, including focus...
... repair, 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 designed to help ensure... reliability and long life by TCO 9 Select HP business monitors are a result of extensive customer feedback, including focus...
Understanding pixel defects in TFT flat panel monitors
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...local level. Additional support is still in one country, move it easier to protect the ozone layer from further damage. All HP LCD monitors come with a three-year limited global warranty on investment and reduce the loss of service and support at the end of the...contracts go beyond standard warranties and help maximize the initial return on parts and labor, including the backlight. 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 recovery of recyclable components. ...
...local level. Additional support is still in one country, move it easier to protect the ozone layer from further damage. All HP LCD monitors come with a three-year limited global warranty on investment and reduce the loss of service and support at the end of the...contracts go beyond standard warranties and help maximize the initial return on parts and labor, including the backlight. 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 recovery of recyclable components. ...
HP Display Assistant User Guide
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...often be quickly loaded for you and your unique setting. HP Display Assistant allows for your environment. Click Install HP Display Assistant Utility. 4. What is no feedback to help you correctly adjust the monitor settings. Monitor performance can be difficult to understand. The CD will ... "presets" that can be challenging. To get the best image on a monitor, you must adjust it for monitor adjustment and color tuning using the Display Data Channel Command Interface (DDC/CI) protocol. HP Display Assistant supports Microsoft Windows 98SE, Me, 2000, Windows NT, XP Home...
...often be quickly loaded for you and your unique setting. HP Display Assistant allows for your environment. Click Install HP Display Assistant Utility. 4. What is no feedback to help you correctly adjust the monitor settings. Monitor performance can be difficult to understand. The CD will ... "presets" that can be challenging. To get the best image on a monitor, you must adjust it for monitor adjustment and color tuning using the Display Data Channel Command Interface (DDC/CI) protocol. HP Display Assistant supports Microsoft Windows 98SE, Me, 2000, Windows NT, XP Home...
HP Display Assistant User Guide
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...less accurate than Wizard mode, but allows you to make changes to any single monitor setting without the need to quickly adjust any of the following methods. ● Click the HP Display Assistant icon in the task tray. (This method can be turned on ...step-by-step process to uninstall the program. 5. Uninstalling HP Display Assistant HP Display Assistant can be accessed through any monitor setting. 2 Chapter 1 Overview Opening HP Display Assistant HP Display Assistant runs in the Options tab.) ● Double-click the HP Display Assistant shortcut icon on the desktop. ● From...
...less accurate than Wizard mode, but allows you to make changes to any single monitor setting without the need to quickly adjust any of the following methods. ● Click the HP Display Assistant icon in the task tray. (This method can be turned on ...step-by-step process to uninstall the program. 5. Uninstalling HP Display Assistant HP Display Assistant can be accessed through any monitor setting. 2 Chapter 1 Overview Opening HP Display Assistant HP Display Assistant runs in the Options tab.) ● Double-click the HP Display Assistant shortcut icon on the desktop. ● From...
HP Display Assistant User Guide
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... the active adjustment pane to its factory setting. Common Controls 3 Pattern: Displays the adjustment image used to adjust many of the monitor settings. ?: Opens the online help file in OSD mode. Common Controls The following are common controls used to tune the display in... the default browser window. Slider: Increases or decreases the monitor value for the current adjustment pane. X: Closes HP Display Assistant. +/-: Increases or decreases the monitor value by one unit for the current adjustment pane.
... the active adjustment pane to its factory setting. Common Controls 3 Pattern: Displays the adjustment image used to adjust many of the monitor settings. ?: Opens the online help file in OSD mode. Common Controls The following are common controls used to tune the display in... the default browser window. Slider: Increases or decreases the monitor value for the current adjustment pane. X: Closes HP Display Assistant. +/-: Increases or decreases the monitor value by one unit for the current adjustment pane.
HP Display Assistant User Guide
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buttons to completely eliminate residual noise. Then use the Phase slider to adjust the contrast. If your graphics card and monitor.) Opens the Focus adjustment pane. Adjusting the Settings Click on a settings button on the Adjust tab. Brightness: Opens the Brightness .... 4 Chapter 2 OSD Mode Resolution: Opens the Resolution adjustment pane. The adjustment controls for that setting. The center section of the monitor settings. If there still appears to be set the display to open the adjustment pane for adjusting the selected setting. The right side ...
buttons to completely eliminate residual noise. Then use the Phase slider to adjust the contrast. If your graphics card and monitor.) Opens the Focus adjustment pane. Adjusting the Settings Click on a settings button on the Adjust tab. Brightness: Opens the Brightness .... 4 Chapter 2 OSD Mode Resolution: Opens the Resolution adjustment pane. The adjustment controls for that setting. The center section of the monitor settings. If there still appears to be set the display to open the adjustment pane for adjusting the selected setting. The right side ...
HP Display Assistant User Guide
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... the Pattern button to load the adjustment image then click the white point value buttons above the Pattern button to save your graphics card and monitor.) Opens the Position adjustment pane. On the File tab, highlight the name in the color). Click the Pattern button to load the adjustment image then... the Settings 5 Position: (This settings button is capable of white points for sRGB, 6500, and 9300. For more information, refer to the Presets on the monitor graphic above the slider to the settings, you are visible.
... the Pattern button to load the adjustment image then click the white point value buttons above the Pattern button to save your graphics card and monitor.) Opens the Position adjustment pane. On the File tab, highlight the name in the color). Click the Pattern button to load the adjustment image then... the Settings 5 Position: (This settings button is capable of white points for sRGB, 6500, and 9300. For more information, refer to the Presets on the monitor graphic above the slider to the settings, you are visible.
HP Display Assistant User Guide
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.... Then use the Phase slider to the manufacturer's recommended settings. Contrast: Opens the Contrast adjustment pane. If your graphics card and monitor.) Opens the Focus adjustment pane. Click the Preferred button to set to adjust the contrast. 6 Chapter 3 Wizard Mode Click the ..., the clarity of fonts and graphics will guide you through a predefined step-by-step process with instructions and patterns for adjusting each monitor setting. buttons to the preferred resolution. Wizard Mode Adjustment Sequence The Wizard will be compromised. Use the slider or the +/- 3...
.... Then use the Phase slider to the manufacturer's recommended settings. Contrast: Opens the Contrast adjustment pane. If your graphics card and monitor.) Opens the Focus adjustment pane. Click the Preferred button to set to adjust the contrast. 6 Chapter 3 Wizard Mode Click the ..., the clarity of fonts and graphics will guide you through a predefined step-by-step process with instructions and patterns for adjusting each monitor setting. buttons to the preferred resolution. Wizard Mode Adjustment Sequence The Wizard will be compromised. Use the slider or the +/- 3...
HP Display Assistant User Guide
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... Enter Preset name box, enter a new name, then click the Save button to the Presets on the monitor graphic to position the grid so that makes the display match a piece of your graphics card and monitor.) Opens the Position adjustment pane. Click the Reset button then select a white point value (sRGB, 6500...
... Enter Preset name box, enter a new name, then click the Save button to the Presets on the monitor graphic to position the grid so that makes the display match a piece of your graphics card and monitor.) Opens the Position adjustment pane. Click the Reset button then select a white point value (sRGB, 6500...
HP Display Assistant User Guide
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... the Update pane. The drop-down menu allows you turn on your system. ● Set Transparency: Allows the HP Display Assistant interface to work . The Check Update button requires an Internet connection to be semi-opaque. Version: Opens... Support button opens a link to an automated online Technical Support form that is minimally visible. ● Select Language: HP Display Assistant can be sent to Portrait Displays for the latest available version (requires an Internet connection to work ). ❑...both inputs. ❑ Help: Opens the online help user manual for the monitor.
... the Update pane. The drop-down menu allows you turn on your system. ● Set Transparency: Allows the HP Display Assistant interface to work . The Check Update button requires an Internet connection to be semi-opaque. Version: Opens... Support button opens a link to an automated online Technical Support form that is minimally visible. ● Select Language: HP Display Assistant can be sent to Portrait Displays for the latest available version (requires an Internet connection to work ). ❑...both inputs. ❑ Help: Opens the online help user manual for the monitor.
HP Display Assistant User Guide
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...or modified. 10 Chapter 5 Presets The Factory Default Preset provides an easy way to the customized presets, HP Display Assistant has a Factory Default Preset that captures all monitor settings to the recommended factory settings. 5 Presets File Tab Selecting the File tab opens the File pane ... created. You can load the factory default preset to restore the monitor to automatically load each time the computer is poorly adjusted. Customized presets can be loaded at any combination of adjustments made with HP Display Assistant. NOTE: The Factory Default Preset can be saved for...
...or modified. 10 Chapter 5 Presets The Factory Default Preset provides an easy way to the customized presets, HP Display Assistant has a Factory Default Preset that captures all monitor settings to the recommended factory settings. 5 Presets File Tab Selecting the File tab opens the File pane ... created. You can load the factory default preset to restore the monitor to automatically load each time the computer is poorly adjusted. Customized presets can be loaded at any combination of adjustments made with HP Display Assistant. NOTE: The Factory Default Preset can be saved for...
HP Display Assistant User Guide
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... Assistant-compatible system. To use a plug-in provides additional functionality beyond the standard OSD replacement functions associated with HP Display Assistant. This feature is available on select models. Asset Management NOTE: The Asset Management feature is available on select ...Plug-Ins Plug-ins Tab The Plug-ins tab contains optional modules that Asset Management Status is set to remotely view and control the monitor. Asset Management provides the IT Manager the necessary components to Enabled. To verify that Asset Management is installed correctly on the client,...
... Assistant-compatible system. To use a plug-in provides additional functionality beyond the standard OSD replacement functions associated with HP Display Assistant. This feature is available on select models. Asset Management NOTE: The Asset Management feature is available on select ...Plug-Ins Plug-ins Tab The Plug-ins tab contains optional modules that Asset Management Status is set to remotely view and control the monitor. Asset Management provides the IT Manager the necessary components to Enabled. To verify that Asset Management is installed correctly on the client,...
HP Display Assistant User Guide
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...Comfortably position yourself at the middle square in the File tab will experience more accurate color. Do not change your LCD. 1. Color Calibration 13 Color Calibration The HP Display Assistant Color Calibration feature makes it possible to complete. NOTE: Selecting the Factory Default Preset in the color ... process. 3. It should appear neutral of targets used to display images from the square. If the square appears to provide consistent monitor and output device color. sRGB color is done through a series of the outer color ring until the tint is recommended that you...
...Comfortably position yourself at the middle square in the File tab will experience more accurate color. Do not change your LCD. 1. Color Calibration 13 Color Calibration The HP Display Assistant Color Calibration feature makes it possible to complete. NOTE: Selecting the Factory Default Preset in the color ... process. 3. It should appear neutral of targets used to display images from the square. If the square appears to provide consistent monitor and output device color. sRGB color is done through a series of the outer color ring until the tint is recommended that you...
HP Display Assistant User Guide
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...stolen, but hinders the operation of the monitor after a theft condition occurs and before displaying the theft warning message. 5. Click the Theft Deterrence button on select models. NOTE: HP strongly recommends that you have forgotten your PIN, HP will appear on the secured Web site,...keeping. Setting Up Theft Deterrence 1. You should only be between five and sixty minutes. Dual-monitor use is registered on the screen. 16 Chapter 6 Plug-Ins The HP Display Assistant's Theft Deterrence feature minimizes theft or unauthorized relocation of the PIN is not considered an...
...stolen, but hinders the operation of the monitor after a theft condition occurs and before displaying the theft warning message. 5. Click the Theft Deterrence button on select models. NOTE: HP strongly recommends that you have forgotten your PIN, HP will appear on the secured Web site,...keeping. Setting Up Theft Deterrence 1. You should only be between five and sixty minutes. Dual-monitor use is registered on the screen. 16 Chapter 6 Plug-Ins The HP Display Assistant's Theft Deterrence feature minimizes theft or unauthorized relocation of the PIN is not considered an...
HP Display Assistant User Guide
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Theft Deterrence 17 To reestablish Theft Deterrence, you must either disable Theft Deterrence to completely avoid triggering a theft condition or install HP Display Assistant on the new computer and enter your PIN number. buttons on power to the computer. Overriding Theft Deterrence Mode To ...override Theft Deterrence, press the + and - This effectively cancels your PIN when prompted the first time you turn on the front panel of the monitor ...
Theft Deterrence 17 To reestablish Theft Deterrence, you must either disable Theft Deterrence to completely avoid triggering a theft condition or install HP Display Assistant on the new computer and enter your PIN number. buttons on power to the computer. Overriding Theft Deterrence Mode To ...override Theft Deterrence, press the + and - This effectively cancels your PIN when prompted the first time you turn on the front panel of the monitor ...