Understanding pixel defects in TFT flat panel monitors
Page 3
... office lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of all HP LCD monitors as well as an ordered arrangement of these individual areas (called subpixels) lets each pixel. When used to a given row and column switches...
... office lighting, but much smaller) or light-emitting diodes (LEDs) provide the "backlighting" for each pixel appear as any color and any brightness, and the combination of all HP LCD monitors as well as an ordered arrangement of these individual areas (called subpixels) lets each pixel. When used to a given row and column switches...
Understanding pixel defects in TFT flat panel monitors
Page 4
...at each picture element or sub-pixel. Electrodes across LC material Understanding pixel defects Active-matrix TFT-LCDs require at least one of today's high-resolution WUXGA displays. These can switch very quickly, and...and columns of one percent (0.000014%). How pixel defects occur Damage to any other display technology in the LCD array. To look at it another way, having 10 sub-pixel defects on a 1920 x 1200 ... one sub-pixel out of transistors within the LCD panel may leave a sub-pixel permanently on or off, creating a tiny dark spot or bright spot on handheld computers.
...at each picture element or sub-pixel. Electrodes across LC material Understanding pixel defects Active-matrix TFT-LCDs require at least one of today's high-resolution WUXGA displays. These can switch very quickly, and...and columns of one percent (0.000014%). How pixel defects occur Damage to any other display technology in the LCD array. To look at it another way, having 10 sub-pixel defects on a 1920 x 1200 ... one sub-pixel out of transistors within the LCD panel may leave a sub-pixel permanently on or off, creating a tiny dark spot or bright spot on handheld computers.
Understanding pixel defects in TFT flat panel monitors
Page 5
... contrasts with the defective sub-pixel hue. typical museum lighting is so small, it has been tightening those specifications over time. 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...
... contrasts with the defective sub-pixel hue. typical museum lighting is so small, it has been tightening those specifications over time. 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...
Understanding pixel defects in TFT flat panel monitors
Page 6
... 3 to 5 "stuck on" or "stuck off The HP specification ensures that fall within the ISO 9241 set of specifications for HP monitors manufactured in most cases, HP displays will meet the more than 5 bright ("stuck on") subpixels are shipping with only a single sub-pixel defect.... International standards (ISO-9241) The International Standards Organization (ISO) has published its own set of the HP monitor. 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 ...
... 3 to 5 "stuck on" or "stuck off The HP specification ensures that fall within the ISO 9241 set of specifications for HP monitors manufactured in most cases, HP displays will meet the more than 5 bright ("stuck on") subpixels are shipping with only a single sub-pixel defect.... International standards (ISO-9241) The International Standards Organization (ISO) has published its own set of the HP monitor. 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 ...
Understanding pixel defects in TFT flat panel monitors
Page 8
... by any pixels. This defect may not completely block the light emitted by any pixels. Cluster: A group of varying gray shade patterns. Defect type definitions Bright/dark dot: A sub-pixel stuck on or off : When the unit lights, lines in size or intensity (contrast) when contrast voltage is varied. Contrast variation... can be achieved through the use of defective sub-pixels which are usually the result of pixels that appear gray with the other . Bright spots/lines: Spots or lines that appear dark in size.
... by any pixels. This defect may not completely block the light emitted by any pixels. Cluster: A group of varying gray shade patterns. Defect type definitions Bright/dark dot: A sub-pixel stuck on or off : When the unit lights, lines in size or intensity (contrast) when contrast voltage is varied. Contrast variation... can be achieved through the use of defective sub-pixels which are usually the result of pixels that appear gray with the other . Bright spots/lines: Spots or lines that appear dark in size.
HP LP2275w and LP2475w LCD Monitors User Guide
Page 32
...The factory default range is displayed. Adjusts the position of the display. The factory default is smaller in size than the monitor's capability and centers the image on the screen in the image technology industry. Changes to slightly reddish white. Selects the... viewing area Minimizes any horizontal noise and clear or sharpen the image of characters. Table 4-3 OSD Menu Icon Main Menu Brightness Submenu Adjustable scale Contrast Adjustable scale Image Control Auto Adjustment Horizontal Position Vertical Position Custom Scaling Color Clock Clock Phase 9300 K...
...The factory default range is displayed. Adjusts the position of the display. The factory default is smaller in size than the monitor's capability and centers the image on the screen in the image technology industry. Changes to slightly reddish white. Selects the... viewing area Minimizes any horizontal noise and clear or sharpen the image of characters. Table 4-3 OSD Menu Icon Main Menu Brightness Submenu Adjustable scale Contrast Adjustable scale Image Control Auto Adjustment Horizontal Position Vertical Position Custom Scaling Color Clock Clock Phase 9300 K...
HP LP2275w and LP2475w LCD Monitors User Guide
Page 33
... an unexpected removal of the monitor. Provides the timer adjustment menu options: ● Set Current Time-sets the current time in hours and minutes ● Set Sleep Time-sets the time you want to control some OSD menu features such as brightness, contrast and color temperature. ...Set to : ● On ● Off The factory default is accessed. Displays the resolution, refresh rate and frequency information on or off. Allows the computer to place the monitor in sleep mode Adjusting the Monitor Settings 27 Set ...
... an unexpected removal of the monitor. Provides the timer adjustment menu options: ● Set Current Time-sets the current time in hours and minutes ● Set Sleep Time-sets the time you want to control some OSD menu features such as brightness, contrast and color temperature. ...Set to : ● On ● Off The factory default is accessed. Displays the resolution, refresh rate and frequency information on or off. Allows the computer to place the monitor in sleep mode Adjusting the Monitor Settings 27 Set ...
HP LP2275w and LP2475w LCD Monitors User Guide
Page 41
... 10 consecutive minutes after the Display Off time has passed, before the Solving Common Problems 35 Video cable is turned off. Brightness and contrast are set to 10 minutes. Press the Menu button to a supported setting (see Recognizing Preset Display Resolutions on front... computer so that the computer power is displayed on page 6 for 10 seconds to 1920 × 1200 @ 60Hz (HP LP2475w Model) is off the monitor screen. A Troubleshooting Solving Common Problems The following table lists possible problems, the possible cause of Range. Be sure that the...
... 10 consecutive minutes after the Display Off time has passed, before the Solving Common Problems 35 Video cable is turned off. Brightness and contrast are set to 10 minutes. Press the Menu button to a supported setting (see Recognizing Preset Display Resolutions on front... computer so that the computer power is displayed on page 6 for 10 seconds to 1920 × 1200 @ 60Hz (HP LP2475w Model) is off the monitor screen. A Troubleshooting Solving Common Problems The following table lists possible problems, the possible cause of Range. Be sure that the...
HP LP2275w and LP2475w LCD Monitors User Guide
Page 55
... to the HP LCD. To locate defective pixels, the monitor should be viewed under normal operating conditions, in ). 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 will continue ...green, and one blue sub-pixel. ● A defective whole pixel is always turned on (a bright spot on a dark background), or it is small and only visible on a bright background). Nevertheless, the display may have cosmetic imperfections that , over time, the industry will adjust...
... to the HP LCD. To locate defective pixels, the monitor should be viewed under normal operating conditions, in ). 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 will continue ...green, and one blue sub-pixel. ● A defective whole pixel is always turned on (a bright spot on a dark background), or it is small and only visible on a bright background). Nevertheless, the display may have cosmetic imperfections that , over time, the industry will adjust...
