HP LP2480zx Understanding pixel defects in TFT flat panel monitors
HP LP2480zx - DreamColor - 24" LCD Monitor Manual
UPC - 883585957767
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HP LP2480zx manual content summary:
- HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 1
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 - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 2
high-quality flat panel displays deliver crisp, clear visual quality at a reasonable price. Even so, some LCD monitors may harbor tiny defects color and detail that forms the sharp, vibrant images flat panel users have come to expect. How do pixel and sub-pixel defects occur? The HP specification - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 3
color and any brightness, and the combination of all the pixels on the panel creates the complete image. Fluorescent lights (very similar to the fluorescent tubes used in standard office lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for the LCD display-the - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 4
switch very quickly, and then hold the state of the sub-pixel while the panel drivers take care of the other rows and columns of the display. This results in a great improvement in the contrast and response time possible with LCD technology, and permits the manufacture of largesize, high-resolution - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 5
specifications over time. HP specifications HP pixel defect specifications continue to be refined, but will always represent the best panel on our displays. In a simplified format, the pixel defect specifications are as follows: Table 1. This policy applies for HP monitors manufactured before - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 6
of the HP monitor. 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 in most cases, HP displays will meet the more stringent Class 1 specification. As mentioned earlier, the HP specifications dictate no full pixel - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 7
defects, and no sub-pixel defects spaced closer than 15 mm, with a maximum of five total sub-pixel defects. Figure 2. Pixel fault definitions. 7 - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 8
" effect caused by non-uniform cell thickness. Pixel: A picture element made up of three primary color sub-pixels (red, green, and blue), which combine to represent a single color dot on the display. Polarizer dent: Physical damage to the polarizer that does not damage the glass. When the unit - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 9
defect specifications are part of HP's ongoing effort to provide high quality products. When it comes to LCD-TFT displays, fewer pixel defects mean better quality. HP quality and reliability HP prides itself on a reputation for industry-standard best-of-breed products-and our line of LCD monitors is - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 10
use only CFC-free processes to protect the ozone layer from further damage. 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 160 countries around the world who provide an impressive depth of - HP LP2480zx | Understanding pixel defects in TFT flat panel monitors - Page 11
is" without warranty of any kind. The warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors
1
Understanding pixel
defects in LCD
monitors
Bob Myers
Displays Business Unit
Last revised: July 1, 2009
Introduction
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2
Executive summary
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2
Understanding TFT-LCD technology
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3
How LCDs work
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3
Why TFTs?
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3
Understanding pixel defects
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4
How pixel defects occur
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4
How to spot a sub-pixel defect
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5
HP pixel-defect standards
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5
HP specifications
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5
International standards (ISO-9241)
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6
Defect type definitions
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8
The HP advantage
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9
HP quality and reliability
.................................................................................
9
Designed with the environment in mind
...........................................................
9
HP service and support
..................................................................................
10
For more information
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11