NEC Multisync Ex231w Users Manual
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English English-9 Flexible Arm Installation This LCD monitor is designed for use with a flexible arm. To mount the monitor to a flexible arm: 1. Follow the instructions on how Remove Monitor Stand for Mounting to remo\ ve the stand. 2. Using 4 screws attach the arm to the monitor (Figure F.1). NOTE: 1. The LCD monitor should only be used with an approved arm (e.g. GS mark)\ . To meet the safety requirements, the monitor must be mounted to an arm, which ensures the necessary stabi\ lity under consideration of the weight of the monitor. 2. The mounting stand must be able to sustain at least 12 kg and be UL cert\ ified. Thickness of Bracket (Arm) 2.0~3.2 mm Weight of LCD assembly: 3.0 kg MAX 100 mm Figure F.1 4 Screws (M4) (Max Depth: 9.5 mm) 100 mm 12 mm 4 x 12 mm with lock washer and flat washer
English-10 Menu Detects the level of ambient lighting allowing the monitor to make adjus\ tments to various settings resulting in amore comfortable viewing experience. Do not cover this sensor. Indicates that the power is on. Turns the monitor ON and OFF. Enters the OSD sub menu. Activates the select function. Changes the Input source (No OSD condition). Opens OSD main menu. Exits the OSD controls. Exits to the OSD main menu. Moves the highlighted area left/right to select control menus. Moves the bar left/right to increase or decrease the adjustment. Direct adjust of BRIGHTNESS (No OSD condition)*. Moves the highlighted area down/up to select one of the controls. Direct adjust of CONTRAST (No OSD condition)*. Resets the highlighted control menu to the factory setting. Switches the\ ECO MODE. Activates Auto Adjust function if touched for 3 seconds (No OSD condition and Analog input only)*. Button 1 Ambibright SensorHuman Sensor 2 LED 3 Power 4 INPUT (SELECT) 5 MENU (EXIT) 6 Left/Right 7 Down/Up 8 ECO (RESET) Controls OSD (On-Screen Display) control keys on the front of the monitor funct\ ion as follows: You can access the OSD menu by touching your finger on any of the control\ keys. To change signal input, touch the INPUT (SELECT) Key. To change ECO MODE, touch the ECO (RESET) Key. NOTE:OSD must be closed in order to change signal input. NOTE: When RESET is touched in the main and sub-menu, a warning window will appear allow\ ing you to cancel the RESET function by touching the MENU Key. * When hot key function is OFF, this function is disabled. EXITLEFTRIGHTDOWN UP RESET SELECT
English English-11 Simple MENU BRIGHTNESS Adjusts the overall image and background screen brightness. If ECO MODE is set to 1 or 2, a bar for CARBON FOOTPRINT will appear. ECO MODE can be set by FULL MENU. AUTO ADJUST (Analog input only) Automatically adjusts the Image Position, Horizontal Size, Fine and Cont\ rast settings. FULL MENU Switch to FULL MENU. See page 11 for detailed information. HUMAN SENSOR Shows current human sensing setting. See page 12 for more details. This function is adjusted threshold by FULL MENU. CARBON SAVINGS Displays the estimated carbon savings information. POWER Displays the current power consumption. FULL MENU Brightness/ECO Function BRIGHTNESS Adjusts the overall image and background screen brightness. If ECO MODE is set to 1 or 2, a bar for CARBON FOOTPRINT will appear. CONTRAST Adjusts the image brightness in relation to the background.
English-12 ECO MODE Decreases the power consumption by reducing the brightness level. OFF: Sets brightness variable from 0% to 100%. (ECO MODE) 1: Sets brightness variable range from 0% to 80%. This setting can adjust brightness to a range in which power is reduced \ to meet Energy Star measurement conditions. (ECO MODE) 2: Sets brightness variable range from 0% to 40%. This setting can adjust brightness to a range in which power is reduced \ by 30% compared to the maximum brightness setting. When this function is set to ON, a CARBON FOOTPRINT bar will appear alongside the brightness adjustment bar. NOTE: This function is disabled when DV mode is set for Dynamic. AUTO BRIGHTNESS OFF: No function. (AUTO BRIGHTNESS) 1: Automatically adjusts the brightness to the optimal setting by detecting\ the brightness level of the environment* 1. (AUTO BRIGHTNESS) 2: Automatically adjusts the brightness to the optimal brightness setting b\ ased on the white display area. The environmental brightness sensor (Ambibright sensor) has no functio\ n. (AUTO BRIGHTNESS) 3: Automatically adjusts the brightness to the optimal setting based on the\ white display area and by using the AmbiBright sensor to detect the brightness level of the environment. *1: Please refer to Page 18 for full “Auto Brightness” information\ . NOTE: This function is disabled when DV mode is set for Dynamic. IPM SETTING The Intelligent Power Manager allows the monitor to enter into a power s\ aving mode after a period of inactivity. The IPM has two settings: STANDARD: Monitor enters power saving mode automatically when the input signal is \ lost. SENSOR: Monitor enters power saving mode automatically when the amount of surrou\ nding light goes below the level determined by you. The level can be adjusted in IPM sensor setting. When in power saving mode, the LED on the front of the monitor becomes d\ ark blue. When in power saving mode, touch any of the front Keys, except for POWER and INPUT, to return to normal. When the amount of surrounding light returns to normal levels, the monit\ or will automatically return to normal mode. SENSOR SETTING (IPM SETTING) Adjusts threshold level of ambient lighting sensor for detected dark con\ dition and shows current sensor measurement result below. START TIME (IPM SETTING) Adjusts wait time to enter into to a lower power consumption level when \ on but not in use. HUMAN SENSING The sensor on the front side of the monitor detects the movement of a pe\ rson by using the HUMAN SENSING function. THE HUMAN SENSING has three settings: OFF: No human sensing. (HUMAN SENSING)1: After it is detected that there is no person after a period of time, the\ monitor shifts to low brightness mode automatically to reduce the power consumption. When a pe\ rson comes near the monitor again, the monitor will automatically return to normal mode. START TIME adjusts wait time to doing. (HUMAN SENSING)2: After it is detected that there is no person, the monitor shifts to powe\ r saving mode automatically to reduce the power consumption. When a person comes near \ the monitor again, it comes back from the power saving mode and displays the images. SENSOR SETTING (HUMAN SENSING) Adjusts threshold level of sensor result for Human detect condition and \ shows current sensor result in bottom side. When measured sensor result is smaller than adjust threshould level, it \ is detected that there is no person. NOTE: When OSD is closed, human sensor starts to work. START TIME (HUMAN SENSING) Adjusts wait time of enter to low Brightness mode or power saving mode w\ hen Human sensor detects no person. DV MODE Dynamic Visual Mode allows you to select setting for Movie, Photo, Dynamic and et\ c. STANDARD: Standard setting. TEXT: Setting that makes letters and lines crisp; best suited for basic word p\ rocessing and spreadsheets. MOVIE: Setting that boosts dark tones; best suited for movies. GAMING: Setting that boosts whole tones; best suited for games that use vivid, c\ olorful images. PHOTO: Setting that optimizes contrast; best suited for still images. DYNAMIC: Setting that adjusts the brightness by detecting the screen’s black areas and optimizes it.
English English-13 Auto Adjust/Image Controls (Analog input only) AUTO ADJUST Automatically adjusts the Image Position, Horizontal Size and Fine setti\ ngs. AUTO CONTRAST Adjusts the image displayed to optimal settings. LEFT / RIGHT Controls Horizontal Image Position within the display area of the LCD. DOWN / UP Controls Vertical Image Position within the display area of the LCD. H.SIZE Adjusts the horizontal size by increasing or decreasing this setting. FINE Improves focus, clarity and image stability by increasing or decreasing \ this setting. INPUT RESOLUTION Selects resolution’s priority of input signal to one of the following pairs: 1360 x 768 or \ 1280 x 768 or 1024 x 768 (vertical resolution 768), 1680 x 1050 or 1400 x 1050 (vertical resol\ ution 1050). Colour Control System Colour Control System: Six colour presets select the desired colour setting (sRGB and NATIVE colour presets are standard and cannot be changed). 1, 2, 3, 5: Increases or decreases Red, Green or Blue colour depending upon which i\ s selected. The change in colour will appear on screen and the direction (increase or decrease) \ will be shown by the bars. NATIVE: Original colour presented by the LCD panel that is unadjustable. sRGB: sRGB mode dramatically improves the colour fidelity in the desktop envir\ onment by a single standard RGB colour space. With this colour supported environment, the operator could\ easily and confidently communicate colour without further colour management overhead in the most common situations\ . NOTE: When MOVIE, GAMING, or PHOTO is selected as the DV MODE, NATIVE is selected automatically as the six colour preset and cannot be changed. Tools DVI SELECTION: This function selects the DVI input mode. When the DVI selection has bee\ n changed, you must restart your computer. Touch “Left” or “Right” to select. DIGITAL: DVI digital input is available. ANALOG: DVI analog input is available. VIDEO DETECT: Selects the method of video detection when more than one computer is con\ nected. FIRST: The video input has to be switched to “FIRST” mode. When current v\ ideo input signal is not present, then the monitor searches for a video signal from the other video input \ port. If the video signal is present in the other port, then the monitor switches the video source input port to the\ new found video source automatically. The monitor will not look for other video signals while the current vide\ o source is present. NONE: The Monitor will not search the other video input port unless the monito\ r is turned on. EXPANSION MODE: Selects the zoom mode. FULL: The image is expanded to 1920 x 1080, regardless of the resolution. ASPECT: The image is expanded without changing the aspect ratio. OFF TIMER: Monitor will automatically power-down when you have selected a predeter\ mined amount of time. Before powering off, a message will appear on the screen asking if you want to delay the t\ urn off time by 60 minutes. Touch any OSD Key to delay the turn off time. LED BRIGHTNESS: You can adjust the Blue LED brightness. DDC/CI: This function allows the DDC/CI function ON or OFF. FACTORY PRESET: Selecting Factory Preset allows you to reset all OSD control settings b\ ack to the factory settings. Individual settings can be reset by touching the ECO (RESET)\ Key.
English-14 Menu Tools LANGUAGE: OSD control menus are available in eight languages. OSD TURN OFF: The OSD control menu will stay on as long as it is in use. In the OSD Turn Off submenu, you can select how long the monitor waits after the last touch of a button to sh\ ut off the OSD control menu. OSD LOCK OUT: This control completely locks out access to all OSD control functions wi\ thout Brightness and Contrast. When attempting to activate OSD controls while in the Lock Out\ mode, a screen will appear indicating the OSD controls are locked out. To activate the OSD Lock Out function, touch INPUT (SELECT), then right control button and hold down simultaneously. To deactivate the OSD Lock Out, touch INPUT (SELECT), then left control button and hold down simultaneously while in the OSD menu. HOT KEY: When this function is activated, ECO Mode, BRIGHTNESS and CONTRAST can be adjusted without entering the OSD menu by using the front keys. ON: The “ECO” keys switch ECO mode. The “Left” or “Right” key adjust the brightness level. The “Down” or “Up” keys adjust the contrast level. OFF: The “ECO”, “Left/Right” and “Down/Up” keys are disable\ d, when No OSD condition. SIGNAL INFORMATION: If you select “ON”, monitor displays “VIDEO INPUT MENU” after changing Input-Port. If you select “OFF”, monitor doesn’t display “VIDEO INPUT ME\ NU” after changing Input-Port. SENSOR INFORMATION: If you select “ON”, monitor displays “HUMAN SENSOR ON” messa\ ge. If you select “OFF”, monitor doesn’t display “HUMAN SENSOR ON” message.\ KEY GUIDE: If you select “ON”, the Key Guide appears on screen when the OSD c\ ontrol menu is accessed. The Key Guide will rotate when the OSD control menu is rotated. FULL MENU OFF: Shows Simple Menu (see page 11). ON: Shows Full Menu. ECO Information CARBON SAVINGS: Displays the estimated carbon savings information in kg. COST: Displays the electricity cost savings in balance. INTEGRAL POWER: Displays the multiple value of the power consumption. CARBON CONVERT SETTING: Adjusts the carbon footprint factor in the carbon saving calculation. This initial setting is based on the OECD (2008 Edition). CURRENCY SETTING: Displays electricity pricing in 6 currency units. CURRENCY CONVERT SETTING: Displays electricity savings in kW/hour (US Currency is default). NOTE: This model’s initial setting is “Currency = US$” and its Currency Convert set\ ting = $0.11. This setting can be changed by using the ECO information menu. If you want to use the French setting, please refer to steps below: 1. Open menu by touching the Menu Key and select the ECO information menu u\ sing the left or right slide key. 2. Select Currency setting by sliding the Up or Down key. 3. The French currency unit is Euro ( ). You can adjust currency setting to Euro icon () from US dollar icon ($) by using the Left or Right key. 4. Select Currency Convert Setting by using the Up or Down slide key*. 5. Adjust Currency Convert Setting by using the Right or Left slide key. * This initial Euro ( ) setting is Germany of OECD (2007 Edition). Please check receipt of French’s electricity prices or OECD data for French. French of OECD (2007 Edition) was 0.12. Information The Information menu indicates the current input, display resolution, ho\ rizontal and vertical frequency, and polarity settings of the monitor. The model and serial numbers of your monitor are also indicated. OSD Warning OSD Warning menus disappear with MENU (EXIT) Key. NO SIGNAL: This function gives a warning when there is no Horizontal or Vertical Sync. After power is turned on or when there is a change of input signal, the No Signal window will appear. OUT OF RANGE: This function gives a recommendation of the optimized resolution and ref\ resh rate. After the power is turned on or there is a change of input signal or if the video signal\ doesn’t have proper timing, the Out Of Range menu will appear. NOTE: It is possible to change the IPM settings or DVI Selection while the “\ NO SIGNAL” or “OUT OF RANGE” messages are displayed.
English English-15 Specifications Monitor SpecificationsMultiSync EX231WNotes LCD ModuleDiagonal: 58.42 cm/23.0 inches Active matrix; thin film transistor (TFT) liquid Viewable Image Size: 58.42 cm/23.0 inches crystal display (LCD); 0.265 mm dot pitch; Native Resolution (Pixel Count): 1920 x 1080 250 cd/m 2 white luminance; 1000:1 contrast ratio, typical (25000:1 Contrast ratio, Dynamic). Input Signal DVI: DVI-I Connector: Digital RGB DVI (HDCP) Analog RGB 0.7 Vp-p/75 ohm Sync Separate sync.TTL level Positive/Negative Composite sync.TTL level Positive/Negative Sync on Green (Video 0.7 Vp-p and Sync Negative 0.3 Vp-p) DisplayPort: DisplayPort Connector: Digital RGB DisplayPort Complies with Standard V1.1a, applicable to HDCP Display Colours 16,777,216Depends on display card used. Synchronization Range Horizontal: 31.5 kHz to 83.0 kHz (Analog) Automatically 31.5 kHz to 83.0 kHz (Digital)Automatically Vertical: 56.0 Hz to 75.0 Hz Automatically Viewing Angle Left/Right: ±85° (CR > 10) Up/Down: 75°/85° (CR > 10) Image Formation Time 5 ms (Typ.) Resolutions Supported 720 x 400* 1: VGA textSome systems may not support all modes listed. 640 x 480*1 @ 60 Hz to 75 Hz 800 x 600*1 @ 56 Hz to 75 Hz 832 x 624*1 @ 75 Hz 1024 x 768*1 @ 60 Hz to 75 Hz 1152 x 870*1 @ 75 Hz 1280 x 1024*1 @ 60 Hz to 75 Hz 1440 x 900*1 @ 60 Hz 1400 x 1050*1 @ 60 Hz to 75 Hz 1680 x 1050*1 @ 60 Hz NEC DISPLAY SOLUTIONS cites recommended1920 x 1080 @ 60 Hz............................. resolution for optimal display performance. Active Landscape: Horiz.: 509.2 mm/20.0 inches Display Area Vert.: 286.4 mm/11.3 inches Portrait: Horiz.: 286.4 mm/11.3 inches Vert.: 509.2 mm/20.0 inches USB Hub I/P: USB Specification Revision 2.0 Port: Upstream 1 Downstream 1 Power Supply AC 100-240 V ~ 50/60 Hz (DC 19 V 2.1 A) AC Adapter Type ADP-40ED A, manufactured by DELTA ELECTRONICS Power Maximun Operation: 31 W Consumption Normal Operation: 23 W (Default setting) Dimensions Landscape: 540.2 mm (W) x 401.3 - 511.3 mm (H) x 215 mm (D) 21.3 inches (W) x 15.8 - 20.1 inches (H) x 8.5 inches (D) Portrait: 318.2 mm (W) x 547.2 - 627.3 mm (H) x 215 mm (D) 12.5 inches (W) x 21.5 - 24.7 inches (H) x 8.5 inches (D) Height Adjustment: 110 mm/4.3 inches (Landscape condition) 80.1 mm/3.2 inches (Portrait condition) Weight 4.2 kg (9.3 lbs)/Without stand: 2.8 kg (6.2 lbs) Environmental Considerations Operating Temperature: 5°C to 35°C / 41°F to 95°FHumidity: 20% to 80% Altitude: 0 to 6,562 Feet / 0 to 2,000 m Storage Temperature: -10°C to 60°C / 14°F to 140°F Humidity: 10% to 85% Altitude: 0 to 40,000 Feet / 0 to 12,192 m *1 Interpolated Resolutions: When resolutions are shown that are lower t\ han the pixel count of the LCD module, text may appear different. This is normal and necessary for all current flat panel technologies when displa\ ying non-native resolutions full screen. In flat panel technologies, each dot on the screen is actually one pixel, so to expand resolutions to full scree\ n, an interpolation of the resolution must be done. NOTE: Technical specifications are subject to change without notice.
English-16 Features Lightweight Design: The design of the display, including a remarkably thin bezel and minimal stand components, promot\ es lightweight for easier portability and desktop maneuvering. Human Sensor: Shifts to a lower power consumption level when a person leaves the monitor, saving your monitor energy costs. Touch Key / Slide key: Allows you to quickly and easily adjust all elements of your screen imag\ e by simply sliding your finger over the icons on the monitor bezel. Redesigned OSD controls allow you to quickly and easily adjust all elements of your screen image\ . Quick Release stand: Allows fast removal for good mobility and multi display setting. Height-adjustable (110 mm) stand with tilt, swivel and pivot add flexibility to your viewing preferences. USB Pass-through: Adds excitement to your computing by connecting you to web cameras, USB memory and more. Simple MENU: Allows you to quickly and easily access basic OSD controls. A broad assortment of advanced adjustments are also available via the Full OSD Menu. No Touch Auto Adjust automatically adjusts your optimal image settings upon initial power-on.\ Colour Control System: Allows you to change between six colour settings on your display to match your personal preference. NaViSet software offers an expanded and intuitive graphical interface, allowing you to more\ easily adjust OSD display settings via mouse and keyboard. The flat screen’s crisp, bright images and crystal-clear text deliver a comfortable viewing experience. ErgoDesign Features: Enhance human ergonomics to improve the working environment and protect your health. Examples include OSD controls for quick and easy image adjustments, tilt base for\ preferred viewing angle, small footprint and complianc e with MPRII guidelines for lower emissions. Plug and Play: The Microsoft ® solution with the Windows® operating system facilitates setup and installation by allowing the monitor to send its capabilities (such as screen size and resolutions s\ upported) directly to your computer, automatically optimizing display performance. IPM (Intelligent Power Manager) System: Provides innovative power-saving methods that allow the monitor to shift\ to a lower power consumption level when on but not in use, saving two-thirds of you\ r monitor energy costs, reducing emissions and lowering the air conditioning costs of the workplace. Multiple Frequency Technology: Automatically adjusts the monitor to the display card’s scanning frequency, thus displaying the resolution required. FullScan Capability: Allows you to use the entire screen area in most resolutions, significan\ tly expanding image size. VESA Standard Mounting Interface: Allows you to connect your monitor to any VESA standard third party mounting arm or bracket. Environmental Impact: The annual typical maximum operating carbon footprint of this monitor (\ world-wide average) is approximately 28.2 kg (calculated by: rated wattage x 8 hours per day x\ 5 days a week x 45 weeks per year x Power-to- Carbon conversion factor - conversion factor is based on OECD publicatio\ n of global CO2 emissions 2008 Edition). This monitor has a manufacturing carbon footprint of approximately 13.1 \ kg. Note: The manufacturing and operating carbon footprints are calculated by a un\ ique algorithm developed exclusively by NEC for its monitors.
English English-17 Troubleshooting No picture• The signal cable should be completely connected to the display card/comp\ uter. • The monitor does not support DisplayPort converter signal. • The display card should be completely seated in its slot. • Front Power Switch and computer power switch should be in the ON positio\ n. • Check to make sure that a supported mode has been selected on the displa\ y card or system being used.(Please consult display card or system manual to change graphics mode.)\ • Check the monitor and your display card with respect to compatibility an\ d recommended settings. • Check the signal cable connector for bent or pushed-in pins. • If the front LED is dark blue, check the status of the IPM mode (see pa\ ge 12) or Human sensor (see page 11). Power Key does not respond • Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor. • When something is stuck on the bezel, key becomes unresponsive. Image Persistence • Please be aware that LCD Technology may experience a phenomenon known as Image Persistence. ImagePersistence occurs when a residual or “ghost” image of a previous \ image remains visible on the screen. Unlike CRT monitors, LCD monitors’ image persistence is not permanent, but const\ ant images being displayed for a long period of time should be avoided. To alleviate image persistence, turn off the monitor for as long as the previous image was displayed. For example, if an image was on the monitor for one hour and \ a residual image remains, the monitor should be turned off for one hour to erase the image. NOTE: As with all personal display devices, NEC DISPLAY SOLUTIONS recommends displaying moving images and using a moving screen saver at regular intervals whenever the screen is \ idle or turning off the monitor when not in use. Message “OUT OF RANGE” is displayed (screen is either blank or sh\ ows rough images only) • Image is displayed only roughly (pixels are missing) and OSD warning “\ OUT OF RANGE” is displayed: Either signalclock or resolution is too high. Choose one of the supported modes. • OSD warning “OUT OF RANGE” is displayed on a blank screen: Signal \ frequency is out of range. Choose one of the supported modes. Image is unstable, unfocused or swimming is apparent • Signal cable should be completely attached to the computer. • Use the OSD Image Adjust controls to focus and adjust display by increasing or decreasing \ the fine total. When thedisplay mode is changed, the OSD Image Adjust settings may need to be re-adjusted. • Check the monitor and your display card with respect to compatibility an\ d recommended signal timings. • If your text is garbled, change the video mode to non-interlace and use \ 60Hz refresh rate. LED on monitor is not lit (no blue or amber colour can be seen) • Power Switch should be in the ON position, Power cord and AC adapter should be connected. • Increase LED BRIGHTNESS adjustment. Picture is not as bright • Make sure ECO MODE and AUTO BRIGHTNESS are turned off. • If the brightness fluctuates make sure AUTO BRIGHTNESS is turned off. • Signal cable should be completely attached. Display image is not sized properly • Use the OSD Image Adjust controls to increase or decrease the H. SIZE. • Check to make sure that a supported mode has been selected on the displa\ y card or system being used.(Please consult display card or system manual to change graphics mode.)\ No Video • Make certain the computer is not in a power-saving mode (touch the keyb\ oard or mouse). • Some video cards do not output video signal when monitor is turned OFF/O\ N or disconnect/connect from the ACpower cord under low resolution with DisplayPort. Brightness difference during multiple monitor usage • Change Auto Brightness to OFF and adjust brightness. NOTE: When Auto Brightness is set to ON, the monitor automatically adjusts brightne\ ss to the environment. When condition is difference, monitor brightness will be difference.
English-18 Using the Auto Brightness function The brightness of the LCD screen can be set to increase or decrease depe\ nding on the amount of ambient light within the room. If the room is bright, the monitor becomes correspondingly bright.\ If the room is dim, then the monitor will dim accordingly. The purpose of this function is to make the viewing experience more comf\ ortable to the eye in a variety of lighting conditions. The Auto Brightness function is set to 1 by default. SETUP Use the following procedures to select the Brightness Range that the mon\ itor will use when the Auto Brightness function is activated. 1. Set the BRIGHTNESS level. This is the brightness level that the monitor will go up to when the amb\ ient light level is highest. Select this setting when the room is at its brightest. Select “1” or “3” in the AUTO BRIGHTNESS menu ( Figure 1). Then use the front Keys to move the cursor up to the BRIGHTNESS setting. Choose the desired brightness level ( Figure 2). 2. Set the DARK level. This is the level of brightness that the monitor will go down to when th\ e ambient light level is low. Make sure the room is at its darkest when setting this level. Then use the front Keys to move the cursor up to the BRIGHTNESS setting.\ Choose the desired brightness level (Figure 3 ). Figure 1 Figure 2 Figure 3 When the “Auto Brightness” function is enabled the Brightness leve\ l of the screen changes automatically according to the lighting conditions of the room ( Figure 4). BRIGHTNESS level set for the monitor to use when ambient lighting level is low. BRIGHTNESS level set for the monitor to use when ambient lighting level is high. BRIGHTNESS range Lb: Border between bright and dim lighting conditions; set at factory L1: BRIGHTNESS level set for the monitor to use when ambient lighting le\ vel is high (L1>Lb) L2: BRIGHTNESS level set for the monitor to use when ambient lighting le\ vel is low (L2