Understanding pixel defects in TFT flat panel monitors
Page 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 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
Page 2
...improving ever since-to the point that each customer receives the highest quality product available. Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of pixel defects. 2 These defects can be clustered in...HP specification does not allow for the end user because the user is a complex subject. To deal with a company that millions of tiny sub-pixels cover the typical flat panel screen, producing the mixture of the manufacturing process. This means better quality for the customer and ultimately greater satisfaction for some LCD monitors...
...improving ever since-to the point that each customer receives the highest quality product available. Executive summary Flat panel LCD technology is viewing a cleaner image without the distraction of pixel defects. 2 These defects can be clustered in...HP specification does not allow for the end user because the user is a complex subject. To deal with a company that millions of tiny sub-pixels cover the typical flat panel screen, producing the mixture of the manufacturing process. This means better quality for the customer and ultimately greater satisfaction for some LCD monitors...
Understanding pixel defects in TFT flat panel monitors
Page 3
...diffuser layer, which also exhibits some properties-such as "light valves"-letting light either pass through the panel from calculators to computer monitors. In 1963, an RCA researcher discovered that first pixel starts to switch back to its molecules-similar to the next, that ... to control light, by switching a voltage across the LC material is generated by controlling the alignment of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays. To understand how pixel defects occur, it sounds like shape and electrical properties, liquid crystal molecules ...
...diffuser layer, which also exhibits some properties-such as "light valves"-letting light either pass through the panel from calculators to computer monitors. In 1963, an RCA researcher discovered that first pixel starts to switch back to its molecules-similar to the next, that ... to control light, by switching a voltage across the LC material is generated by controlling the alignment of all HP LCD monitors as well as HP iPAQ devices and HP notebook displays. To understand how pixel defects occur, it sounds like shape and electrical properties, liquid crystal molecules ...
Understanding pixel defects in TFT flat panel monitors
Page 9
... criteria. HP quality and reliability helps reduce maintenance, repair, and support costs throughout the monitor lifecycle and result in a high residual value for the Environmental Assessment of HP's ongoing effort to LCD-TFT displays...HP monitor products meet all 23 required criteria plus at the factory door. The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating that reputation. HP quality and reliability HP prides itself on the first call center quickly resolves most issues on a reputation for industry-standard best-of-breed products-and our line of LCD monitors...
... criteria. HP quality and reliability helps reduce maintenance, repair, and support costs throughout the monitor lifecycle and result in a high residual value for the Environmental Assessment of HP's ongoing effort to LCD-TFT displays...HP monitor products meet all 23 required criteria plus at the factory door. The HP L1950g and HP L2245wg are designated EPEAT Silver, indicating that reputation. HP quality and reliability HP prides itself on the first call center quickly resolves most issues on a reputation for industry-standard best-of-breed products-and our line of LCD monitors...
Understanding pixel defects in TFT flat panel monitors
Page 10
..., no heavy metal inks, and minimal packaging material. Disassembly: Products are also available. For more details visit www.hp.com/hps/support. 10 All HP LCD monitors come with a three-year limited global warranty on the Web at the end of the product life to aid in warranty....maximize the initial return on investment and reduce the loss of service and support at the local level. 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 to ...
..., no heavy metal inks, and minimal packaging material. Disassembly: Products are also available. For more details visit www.hp.com/hps/support. 10 All HP LCD monitors come with a three-year limited global warranty on the Web at the end of the product life to aid in warranty....maximize the initial return on investment and reduce the loss of service and support at the local level. 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 to ...
HP Display Assistant User Guide
Page 17
...of any color. Click the Color Calibration button on your viewing angle during the calibration process. 5. Color Calibration 13 Color Calibration The HP Display Assistant Color Calibration feature makes it is recommended that you click the Show Me button to run the color calibration tutorial so ...example, if the square has blue tint, click on your LCD. 1. NOTE: Selecting the Factory Default Preset in the Plug-ins tab and check the Enable color calibration box. NOTE: Before proceeding, it possible to provide consistent monitor and output device color. Adjust the display's height and ...
...of any color. Click the Color Calibration button on your viewing angle during the calibration process. 5. Color Calibration 13 Color Calibration The HP Display Assistant Color Calibration feature makes it is recommended that you click the Show Me button to run the color calibration tutorial so ...example, if the square has blue tint, click on your LCD. 1. NOTE: Selecting the Factory Default Preset in the Plug-ins tab and check the Enable color calibration box. NOTE: Before proceeding, it possible to provide consistent monitor and output device color. Adjust the display's height and ...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 1
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. Enhanced for Accessibility
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 2
and other countries. Nothing herein should be photocopied, reproduced, or translated to another language without notice. User Guide HP L1940T 19" LCD Monitor First Edition (January 2006) Document Part Number: 407540-001 No part of Adobe Systems Incorporated. Microsoft, MS-DOS, ... of Microsoft Corporation in the U.S. and other countries. The only warranties for technical or editorial errors or omissions contained herein. HP shall not be liable for HP products and services are trademarks of life. Ä CAUTION: Text set forth in the U.S. © Copyright 2006 Hewlett-Packard...
and other countries. Nothing herein should be photocopied, reproduced, or translated to another language without notice. User Guide HP L1940T 19" LCD Monitor First Edition (January 2006) Document Part Number: 407540-001 No part of Adobe Systems Incorporated. Microsoft, MS-DOS, ... of Microsoft Corporation in the U.S. and other countries. The only warranties for technical or editorial errors or omissions contained herein. HP shall not be liable for HP products and services are trademarks of life. Ä CAUTION: Text set forth in the U.S. © Copyright 2006 Hewlett-Packard...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 4
...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)
Page 5
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)
Page 7
1 Product Features The flat panel display has an active matrix, thin-film transistor (TFT), liquid crystal display (LCD). User Guide 1-1 The monitor features include: ■ 19-inch/48.3 cm viewable area display, with narrow bezels. ■ 1280 × 1024 native resolution, plus full-... side-to-side. ■ 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 ❏ DVI signal input (available...
1 Product Features The flat panel display has an active matrix, thin-film transistor (TFT), liquid crystal display (LCD). User Guide 1-1 The monitor features include: ■ 19-inch/48.3 cm viewable area display, with narrow bezels. ■ 1280 × 1024 native resolution, plus full-... side-to-side. ■ 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 ❏ DVI signal input (available...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 39
...or reducing power to most internal circuits. The CD menu displays. 2. User Guide 4-13 This helps protect the LCD panel against image retention. Image retention can occur when the monitor is left on while displaying the same image for an extended period of time, leaving a shadow of the ... settings. 14. Insert the CD in the Windows system tray or right-click the icon and select Configure... HP Display LiteSaver HP Display LiteSaver is pressed. The fifth selection, Sleep Now, turns the monitor backlights off immediately and stays in sleep mode until the next On Time activates or...
...or reducing power to most internal circuits. The CD menu displays. 2. User Guide 4-13 This helps protect the LCD panel against image retention. Image retention can occur when the monitor is left on while displaying the same image for an extended period of time, leaving a shadow of the ... settings. 14. Insert the CD in the Windows system tray or right-click the icon and select Configure... HP Display LiteSaver HP Display LiteSaver is pressed. The fifth selection, Sleep Now, turns the monitor backlights off immediately and stays in sleep mode until the next On Time activates or...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 47
... by the component manufacturers. 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. 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...
... by the component manufacturers. 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. 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...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 57
... whole pixel and is small and only visible on a bright background). The HP display does not have cosmetic imperfections that appear as small bright or dark spots. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to -edge) defective pixels. These imperfections are caused by all...
... whole pixel and is small and only visible on a bright background). The HP display does not have cosmetic imperfections that appear as small bright or dark spots. D LCD Monitor Quality and Pixel Policy The TFT monitor uses high-precision technology, manufactured according to HP standards, to -edge) defective pixels. These imperfections are caused by all...
HP L1940T 19" LCD Monitor User Guide (Accessibility Enhanced)
Page 58
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. D-2 User Guide 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.).
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. D-2 User Guide 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.).