ThinkVision L2251x 22-in Wide Flat Panel LCD Monitor - Overview

ThinkVision L2251x 22-inch Wide Monitor (2578)

ThinkVision L2251x 22-inch Wide Monitor (2578)
Machine Type - Models: 2578-HN6, 2578-HB6

Features and specifications

The ThinkVision L2251x 22-inch Wide Monitor (2578) features:

  • 22-inch widescreen monitor with 1680 x 1050 resolution; 16:10 aspect ratio
  • VGA analog and DisplayPort video input, including:
    • Dual input for attachment of two systems concurrently; the user selects which PC system image is display
  • USB 2.0 Hub
    • One USB port for PC system attachment
    • Three USB ports for accessories
  • Integrated 0.3 megapixel camera and microphone
    • Integrated camera, using ThinkVision L2251x Environment Sensing Utilities (ESU) Software, includes:
      • Ambient light sensor: Measures ambient light levels. This allows automatic adjustment of monitor brightness, thereby saving energy
      • Proximity sensor: Determines if a person is not in front of the monitor. This allows automatic power management to shut down the monitor, thereby saving energy
  • Ergonomic stand with multiple user adjustments: tilt, lift, swivel and pivot
  • Detachable rear stand cable cover and clip to hide cables
  • Microsoft Windows 7 certified
  • Compliance includes:
    • TCO (TCO Certified Edge)
    • EPEAT GOLD rated
    • ENERGY STAR 5.0 (United States)
  • Supports attachment of optional ThinkVision Soundbar
Monitor Size 22.0 inch (559 mm)
Viewable image size 22-inch (559 mm)
Maximum viewable area (W x H) 437.8 mm x 296.1 mm
Native resolution 1680 x 1050
Video input VGA Analog, DisplayPort
Contrast ratio (typical) 1000 : 1
Brightness (typical) 250 cd/m2
Colors 16.7 million
Viewing angle (typical) Horizontal: 170 degrees (at 10:1 contrast ratio)
Vertical: 160 degrees (at 10:1 contrast ratio)
Response time (typical) 5 ms
Pixel pitch 0.282 mm
Signal cable - 15-pin D 1.8 m
Signal cable - DisplayPort 1.8 m
USB cable 1.8 m
SYNC Type Composite/Separate TTL
SYNC on Green No
USB input 1
USB output 3
Bezel width (Side) 15.3 mm
Tilt 0 degrees forward
30 degrees backward
Swivel +/- 45 degrees
Height adjustment 110 mm
Pivot Yes (graphic card dependent)
Soundbar Attachment Optional ThinkVision Soundbar
Webcam+Mic Yes
Kensington Security Lock Slot ( Yes
User controls Digital
Lockable controls Yes
OSD languages 8
Preset display modes 24
User defined display modes 20
VESA DDC capable 2B/CI
ISO 9241-307 capable Yes
Power management capable Yes - VESA DPMS
Power supply Universal Voltage (100 to 240 VAC)
Power cord - detached 1.8 meter
JEIDA compliance Yes
FCC B compliance Yes
MPR-2 Emission compliance Yes
TCO Certified Edge Compliance Yes
EU Directive 2002/95/EC (RoHS) Yes
EU Directive 2002/96/EC (WEEE) Yes
EU Directive 2005/32/EC (EuP) Yes

Physical specifications
Width 19.92 inch (506 mm) 23.27 inch (591 mm)
Depth 9.50 inch (241 mm) 17.83 inch (453 mm)
Height 14.97 inch (380 mm) 9.17 inch (233 mm)
Weight 12.39 lb (5.63 kg) 18.96 lb (8.62 kg)
Weight - without lift/tilt/swivel/pivot stand 8.18 (3.71 kg) - - - - - - - - - -

Power requirements
  • Input voltage: 100 to 240 V ac +/- 10% (universal voltage)
  • Frequency: 50/60 Hz
  • Power consumption:
    • Maximum: 28 watts
    • Typical: 21 watts typical*
    • Standby: <1 watts
    • Suspend: <1 watts
    • Off: < 0.5 watts at 100 V ac
    • Maximum earth leakage current:
      • < 3.5 mA at 264 Vac
      • < 0.25 mA at 100 Vac

* Typical power consumption is tested under EPA 5.0 method.

Ambient temperature and relative humidity
ParameterTemperatureRelative humidityAltitude
Operating 0 to 40 deg.C 10 to 80 % 0 to 8,000 ft
Shipping -20 to 60 deg. C 5 to 95 % 0 to 40,000 ft
Storage -20 to 60 deg. C 5 to 95 % 0 to 40,000 ft


Declared acoustical noise emissions LWAU = 4.5 bels or less. The noise emission level stated is the declared (upper limit) A-weighted sound power level, in bels, for a random sample of monitors. All measurements are made in accordance with ANSI S12.10 and reported in conformance with ISO/DIS 7779.

  • One monitor
  • An attached stand that provides tilt
  • An attached 1.8 m (5.9-feet) analog video cable (15-pin D to 15-pin D)
  • An detached 1.8 m (5.9-feet) DisplayPort video cable
  • An detached 1.8 m (5.9-feet) USB cable
  • Power cord
  • A CD containing multilingual user's guide, setup test pattern, and .INF File
  • Setup Guide
  • Safety and Warranty Information

Note: With the exception of the models for U.S., Canada, and Japan, the power cords (based on the country order code) are supplied by distribution centers.


Three years - Customer Carry-in or Mail-in using Rapid Replacement Service

  • Announce date: 20 Oct 2009 (Worldwide and Topseller: Europe/Middle East/Africa)
  • Planned availability date: 25 Nov 2009 (Worldwide and Topseller: Europe/Middle East/Africa)

Hardware compatibility

The display is intended to operate with system units or video adapters that generate a video output signal falling within the following specification:

Native Resolution 1680 x 1050 pixels
Maximum pixel rate VGA:205 MHz
DP: 10.8 Gbps

The monitor supports VESA Standard Timings as detailed in "Display Monitor Timing Specification," Version 1.8, dated September 17, 1998, for the following modes:

  • VGA: 640 x 480 at 60, 66, 72, and 75 Hz
  • SVGA: 800 x 600 at 60 , 72 and 75Hz
  • XGA: 1024 x 768 at 60, 70, and 75Hz
  • SXGA: 1280 x 1024 at 60, 72 and 75Hz
  • WXGA: 1440 x 900 at 60 and 75Hz
  • UXGA: 1680 x 1050 at 60 and 75Hz

This monitor also supports the following modes:

  • 640 x 350 at 70 Hz
  • 640 x 500 at 58 Hz
  • 720 x 400 at 70 Hz
  • 1152 x 864 at 75 Hz
  • 1360 x 768 at 60 Hz
  • 1600 x 1000 at 60 Hz

Note: National language support is a function of the video adapter in the system unit and the application or support software.

Preset Display Modes
(H x V Pixels)
Incoming video refresh rate
640 x 350 70 Hz
640 x 480 60 Hz
66 Hz
72 Hz
75 Hz
720 x 400 70 Hz
800 x 600 60 Hz
72 Hz
75 Hz
1024 x 768 60 Hz
70 Hz
75 Hz
1152 x 864 75 Hz
1280 x 1024 60 Hz
72 Hz
75 Hz
1440 x 900 60 Hz
75 Hz
1600 x 1000 pixels 60 Hz
1680 x 1050 pixels 60 Hz
75 Hz
  • User modes: 20

The preset modes cannot be overwritten, but can be adjusted to personal choice. The new settings are stored automatically in one of the user locations and are recalled each time that mode is used. The factory settings for the mode in use, if any, can be restored by operating the reset control.

Information about the current incoming display mode is shown in the on-screen displays. However, it is displayed at the LCD panel's optimum refresh rate of 60 Hz.

It may be necessary to make some adjustments to the displayed image to compensate for variations in video signal timings. The user controls can be used to make these adjustments.

The ThinkVision L2251x 22-in Wide Flat Panel LCD Monitor (2578-HB6 and Topseller 2578-HN6) is supplied with an attached 1.8-meter video signal cable. This cable has the widely used 15-pin, D-Sub video connector for system unit connection.

This model has been tested with ThinkPad and ThinkCentre systems. It is compatible with systems and graphics adapters that comply with the relevant parts of "VESA and industry standards and guidelines for computer display monitor timing" Version 1.8, adopted September 17, 1998. Supported display modes and number of colors are a function of the attaching system unit. The full range of display modes, refresh rates, and number of colors available with this monitor may not be available or supported with all combinations of system units, their operating systems, and application software. Implementation of monitor plug and play follows the VESA DDC standard. This standard must also be implemented in the attaching system unit hardware and software to be effective.

Software requirements
  • Microsoft Windows XP
  • Microsoft Windows Vista
  • Microsoft Windows 7

Ergonomics/Emissions/Environmental/Compatibility Approvals
  • Emissions:
    • TCO Cerified Edge
    • MPR-2 (Sweden)
  • Power management: ENERGY STAR 5.0 (United States)
  • Ergonomics:
    • ISO 9241 - 307
  • Environmental:
    • EU Directive 2002/95/EC (RoHS)
    • China Energy Efficiency Standard Tier 1
    • WEEE
    • e-stanby(Korea)
    • EPEAT Gold
    • RoHS/China RoHS/Turkey RoHS
  • Software: Windows Hardware Logo Program

Agency approvals - EMI/Safety
  • Safety
    • UL (U.S.)
    • CSA/cUL (Canada)
    • IEC950 CB Report
    • NEMKO (Norway)
    • TUV (Germany)
    • TUV-S (Argentina)
    • CCC (China)
    • NOM (Mexico)
    • SASO (Saudi Arabia)
    • GOST (Russia)
    • Ukraine
    • PSB (Singapore)
    • KC (Korea)
    • GS
    • BSMI(Taiwan)
    • KVALITET(Serbia)
    • ISC(Cambodia)
  • EMC
    • FCC B (United States)
    • IC (Canada)
    • CE (Europe)
    • KC (Korea)
    • Australia
    • VCCI Class B (Japan)
    • New Zealand
    • BSMI (Taiwan)
    • CCC (China)
    • SABS (South Africa)

  • Supported display modes are a function of the attaching system unit and video subsystem. The full range of display modes available with these monitors may not be available or supported with all combinations of system units, their operating systems, video adapter cards, and application software.
  • Horizontal- and vertical-synchronization signal timings are critical in order to achieve acceptable screen images. As a consequence, support for all possible variations in H- and V-sync timings for any displaymode cannot be assumed.
  • Adjustment of the user controls to enlarge the image to its maximum size requires that the signal timings of the display mode being used fall within the monitor-timing specifications.
  • This monitor provides FCC class B - residential installation - compliance in all display modes.
  • Implementation of monitor power management follows the VESA DPMS standard. This standard must also be implemented in the attaching system unit hardware and software for monitor power management to be effective. The system implementation must provide user-adjustable, power-down delay periods. The monitor powermanagement function is invoked only after appropriate signals are received from an attached system unit or video adapter.
  • Implementation of monitor Plug and Play follows the VESA DDC standard. This standard must also be implemented in the attaching system unit hardware and software for monitor Plug and Play to be effective.
  • Certain functions require the system unit to be similarly configured, so all monitor functions may not be enabled when attached to a particular system unit.
  • A 22.0-inch (558.8 mm) flat-panel LCD monitor has nearly 5.3 million subpixel transistors laid over an area exceeding 217 square inches. Cost-effective manufacturing processes introduce a small number of defective subpixel transistors. The Lenovo ThinkVision L2251x Wide meets the ISO 9241-307 Pixel Defect follows:
    • The Auto-Setup "test pattern" can be used with Microsoft Windows XP, Windows Vista, Windows 7, and DOS 7.0 only.

Additional Product information
ThinkVision L2251x Environment Sensing Utilities (ESU) Software - Software for your product
ThinkVision L2251x Environment Sensing Utilities (ESU) - Video Driver Recommendations - Information to install the most recent available system drivers
Configuration files - Relevant files for your product
Serviceparts - Parts listingfor your product
Publications - Instruction manual for your product
Troubleshooting - Step-by-step instructions for solving common monitor issues
Lenovo ThinkVision Monitors ( ) - ThinkVision monitor information
Lenovo Support: Monitors - Reference Guide - A list of monitors
Lenovo Support: Monitor Accessories - Reference Guide - A list of monitor accessories (stands, arms, displayport cables, cable locks, soundbars)
Lenovo Support: DisplayPort Cables - Product and compatibility information for DisplayPort monitor cables
Lenovo Support: Graphic Cards - Reference Guide - A list of graphic cards for desktop and workstation systems
Lenovo Support: Accessories - Reference Guide - A list of accessories for notebook, desktop, workstation, server accessories - Additional information on options and accessories, including the Option Compatibility Matrix (OCM)
Personal Systems Reference (PSREF) - Comprehensive information on the features and technical specifications on Lenovo products
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  • Alias ID: MIGR-73625
  • Document ID: PD014472
  • Last Updated :26 Mar 2014
  • © 2015 Lenovo