PHILIPS 21XLP -2 Light Probe for Brilliance 201CS monitor with Cyberscreen ® technology
1XLP -2 Light Probe for Brilliance 201CS monitor with Cyberscreen ® technology User‘s Guide First edition - November 1996 This guide has been made of recycled paper, to help protect the environment.
IMPORTANT NOTICE Because of a continuous product improvement poiicy, information in this guide and the software furnished with it are subject to change without notice. PHiLiPS Eiectronics N.V. shail not be iiable for any technicai or editoriai error contained herein, nor for direct, indirect or consequentiai damages resulting from any defect in the software or in its documentation. This guide contains information protected by copyright.
Printing History The firmware release printed after the date indicates the version level of the Light Probe software at the time the manual was issued. Edition 1, November 1996 Light Probe software release 3.0 Since many software updates do not require manual changes and viceversa, do not expect a one-to-one correspondence between software releases and manual editions.
Preface Thank you for purchasing the 21XLP -2 Light Probe for Briliance 201CS monitor with Cyberscreen ® technology. We hope you will enjoy using it and we are confident that this quality product will meet your highest expectations. This user guide tells you how to install and operate the 21XLP -2 Light Probe packa ge. Here is how the manual is organized: Chapter 1 gives an overview of the Brilliance 201 CS technology and a brief intro duction of the 21XLP -2 Light Probe.
CONTENTS Chapter 1 - Before you begin A few words about the Cyberscreen ® technology The 21XLP -2 Light Probe enhancement 1 2 Chapter 2 - Getting started Package contents System requirements Installing the hardware Installing the software Display ID and preset values saving How to start 3 3 4 6 7 8 Chapter 3 - White balance calibration About color temperature selection Calibrating the white point 8 9 Chapter 4 - Brightness and color uniformity calibration About brightness and color uniformity Calib
Chapter 6 - Cleaning and maintenance Cleaning and maintenance 19 Appendix A - What’s behind Color basics How displays create colors About color uniformity The Cyberscreen ® state of the art technology Expressing colors: CIE system Color temperature The convergence problem The Cyberscreen ® solution 20 21 21 22 22 23 24 24 Appendix B - Warnings and error messages Warnings and error messages VI 25
1 Before you begin A few words about the Cyberscreen ® technology Your Brilliance 201CS has put a milestone in CRT color display technology. Thanks to its unique DDA (Digital Dynamic Adjustment) system, color, brightness and convergence are digitally optimized over the entire screen, providing an out standing sharp, precise and uniform image.
The LP21 -2 Light Probe enhancement Specifically designed for the operation with the 21” Cyberscreen ® display, theLP21 -2 calibration package offers a precise, PC based adjustment of color/ brightness uniformity as well as for convergence, for fast on-site recalibration and maintenan ce of your display. In other words, this product enables you to compensate any drift that may occur due to the aging of the picture tube, maintaining the superior performances of your display over the product lifetime.
2 Getting started Package Contents Besides the 21XLP -2 Light Probe, the package also includes everything needed for hardware installation and software configuration.
Installing the hardware STEP 1 Choose a comfortable and secure location for the Light Probe unit, making sure that the interconnection cables can reach both the monitor and the computer. Check that either the device or the cables will not interfere when you tilt and swivel your moni tor. CauYioN: do not place the Light Probe unit on top of your monitor. If you obstruct the air flow coming from the cabinet ventilation slots both the monitor and the Light Probe unit can be damaged by excessive overheating.
STEP 4 (for Windows) Connect the cable having the 9 pin D- sub miniature receptacle type connector (female) to a free RS 232 port of your computer. STEP 4 (for Apple) Insert the RS232 Mac adaptor into the Modem port of your Apple PC and then con nect on it the cable having the 9 pin D- sub miniature receptacle type connector (female). NOtE: In case all your serial ports are used, you will be required to temporarily disconnect a peripheral device to allow the connection of the Light Probe unit.
Installing the software Install software for Windows STEP 1: Turn your system on and start the Windows session. STEP 2: Insert the floppy disk with the 21XLP-2 Light Probe software. STEP 3: From the Program manager File menu, select Run. STEP 4: When the Windows dialog box appears, type the letter of the drive the disk is in, followed by a colon and the word ‘setup’. example : a ; setup After a while , a ‘welcome’ box will appear on the screen. Just dick ‘Continue' to proceed with the installation.
Display identification and preset values saving NOTE: every time the monitor is powered on, the first time you run the calibration program a ‘zero calibration’ of the Light Probe is performed. During this operation, identified by the program as Dark measxire, place the probe in its base housing.
How to start From the Program manager window, open the cyberscreen ii program group and double click on the 21xlp _2 icon to start the application. You will be prompted to tell the program to which serial port the Light Probe is con nected to and then, if necessary, a zero calibration of the Light Probe will be perfor med. Now the ‘Adjustment geometry’ pop up window will appears on the screen. By fol lowing the instructions in the dialog box, adjust the black horizontal-verical borders.
Information on tvolcallv used color temperature: D SO: this setting corresponds to the North American industry standard color temperature for proofing coior photographs. SSOO’K
STEP3 After confirming the white seiection, the screen will turn into a full white page pat tern. Put the Light Probe at the center of the screen and click OK. NOYE: in case the purpose of the calibration is to match two 21” Cyberscreen ® displays at different locations, make sure that ambient lighting conditions are simi lar.
4 Brightness and color uniformity calibration About brightness and color uniformity Your 21 ” Cyberscreen ® monitor has been precisely aligned at the factory to get the best performances out of the picture tube/electronic drive system combination by using the most advanced automatic alignment techniques.
If the difference between readings at any point of the screen and the reference cen ter is found to be greater than 10%, then the display needs to be re-calibrated. In that case, two different calibration options are avaiiabie: Local uniformity: this is a quick calibration process; use this option if just one area of the screen needs to be calibrated. Global uniformity: this is the complete calibration procedure; use this option if seve ral areas on the screen need calibration.
When calibration has been completed, you will be asked to save the calibration results: if you choose Cancel, the calibration will be discarded; if you want to save just click OK and then assign a name to the new correction file (default extension is .BRG). Global uniformity STEP 1 From the uniformity menu of the 21XLP -2 application window select Execute Global Uniformity. The screen will turn into a full red page pattern. Put the Light Probe at the center of the screen and click OK.
Loading factory presets and user’s correction tables The factory data of your monitor have been saved on hard disk during the 21XLP 2 software installation; to recall the original monitor uniformity correction table, just select Restore factory data from the Uolformity menu of the 21XLP-2 appli cation. With the Get user data selection of the uniformity menu, you can down load to the monitor any of the calibration tables you have previously saved on the disk.
5 Convergence adjustment About convergence Even though the purpose of the 21XLP -2 Light Probe is to measure and calibrate colors, the software furnished with it allows you to get full control of the DDA cx3rrection system of your Brilliance 201CS display, including the digital convergence correction section. As already discussed in Chapter 1, the DDA correction system works by dividing the screen into a 16x16 matrix and with the ability of controlling the beam position for each of the resulting 256 areas.
Adjusting the convergence NOTE: before you attempt to adjust the convergence, your system needs to be ‘war med up’. Do not calibrate the display unless it has been operating for at least 30 min. NOTE: every time you run the 21XLP -2 application, the program will be searching for the Light Probe unit. For this reason, even if the Light Probe will not be used during convergence adjustment it must remain connected to the system.
color). Use this adjustment if, after performing the R,B adjustment, the Green beam can still be perceived as a single color. NÖTE: the Global convergence adjustment behavior reflects the so called ‘static convergence’ adjustment as available on some computer displays. Although this option is provided to adjust convergence errors at the screen center, remember that any change in beam positions made with this option will change the beam positions for the whole screen area.
Loading factory presets and user’s correction tabies The factory data of your monitor have been saved on hard disk during the 21XLP 2 software instaliation; to recaii the original monitor uniformity correction table, just select Restore factory data from the Convergence menu of the 21XLP -2 application. With the Get user data selection of the Convergence menu, yOU can down load to the monitor any of the adjustment tables you have previously saved on the disk.
6 Cleaning and maintenance After a calibration process, the rubber cup of the Light Probe may leave circular prints on the monitor screen. To clean these rings, first shut down your computer and turn off the power to the monitor. Moisten a lint-free cloth with a diluted household glass cleaner and then use the cloth to wipe the monitor screen. The same cieaning can be used also for the rubber cup of the Light Probe. fcALlTiONl: do not spray glass cleaner directly onto the screen.
What’s behind This last section of the User’s guide introduces you to the theory of color perception and describes how your monitor can display color images. It briefly explains also the limitations of a traditional CRT display system and the innovations of the Cyberscreen ® technology. Color basics Surprisingly, color as such does not exist in nature. What happens is that human eye is sensitive to different frequencies of the Electromagnetic Radiation which we call light.
How displays create colors A color display, being a CRT based device, acts itself as a light source and the way how it creates colors is based on the aforesaid Additive principle. The inside surface of the CRT screen is coated with three special type of phosphors that, when struck by high energy electrons, glow with particular frequencies of light perceived respectively as the Red, Green and Blue primary colors.
The 21” Cyberscreen ® monitor state of the art technology Your Cyberscreen ® monitor has put a milestone in CRT color display technology. Thanks to its unique DDA system (Digital Dynamic Adjustment), the drives of the RGB guns are digitally controlled over the entire screen so that the monitor electro nics can compensate for the lack of color and brightness uniformity of the picture tube.
The numbers x and y do not have units of measurements; while there are two main units of measurement of factor Y in use today: ‘Candela per square meter” (Nit) and ‘Foot Lamberts’(FI).
The convergence problem The electron guns in a color CRT are mounted alongside each other and in most cases they are placed in line. This is necessary for the shadow mask in fiitering out the eiectron beams on their way to the front of the screen, so that they can reach the designated phosphor oniy. The problem with this system is that the offset beams travei along different paths and may fail to hit the same phosphor triad, as instructed by the computer.
B Error messages If system displays; 2lXliP not connected It means that the application program is unable to locate the Light Probe unit at the selected serial port. Check if aii the cabies are properiy connected and if the serial port you specified is the right one. Once you have fixed the problem, you need to switch the monitor off and then on again to recover the error condition.
If system displays: Fatal error - please restart the program it means that an unrecoverable communication error has occurred during the cali bration process(e.g. the monitor has been turned off). Piease restart both the monitor and the calibration program. If system displays: Harnlog: the syst^ has detected sor box does not match.........
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