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NovaStar CalCube MiniLED User Manual

NovaStar CalCube MiniLED User Manual

Screen calibration
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CalCube MiniLED
Screen Calibration
User Manual

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Summary of Contents for NovaStar CalCube MiniLED

  • Page 1 CalCube MiniLED Screen Calibration User Manual...

  • Page 2: Change History

    CalCube MiniLED Calibration User Manual Change History Document Software Release Date Description Version Version V2.1.0 V2.1 2021-09-17  Added the Coex control system connection.  Added the full-grayscale calibration mode. This mode must work with the Coex control system. ...

  • Page 3: Table Of Contents

    CalCube MiniLED Calibration User Manual Contents Change History ................................. i 1 Introduction ..................................1 Overview .................................. 1 Features ................................... 1 Software Installation..............................1 Software Introduction ............................... 2 2 Basic Calibration Procedure ............................4 3 Calibration Preparation..............................7 Set up Hardware Environment ..........................7 3.1.1 Configuration List ............................
  • Page 4 CalCube MiniLED Calibration User Manual C3200 Camera Connection Failed ........................... 51 Camera Parameter Analysis Failed Due to Excessive Ambient Light ..............52 Camera Parameter Analysis Failed Due to Area Positioning Distance ..............54 Calibrate the Display to a Specified Color Temperature ................... 56 Poor Calibration Effect of A Color with Generate Target Values Enabled ..............

  • Page 5: Introduction

    ± 0.003 after calibration Software Installation CalCube MiniLED is installed in the same way as an ordinary application. You can install it by following the setup wizard. After installation, a computer restart is required. Operating environment: Windows 7 (64-bit only), Windows 10 (64-bit only). All operations in this document are performed in Window 10.

  • Page 6: Software Introduction

    CalCube MiniLED Calibration User Manual Software Introduction Navigation Page Figure 1-1 Navigation page Area Content Description CalCube MiniLED Software name and logo and logo V2.1 Software version Functions Support screen calibration. Language Supported UI languages: English and Simplified Chinese : Open the selected project.
  • Page 7 CalCube MiniLED Calibration User Manual Main User Interface Figure 1-2 Main user interface Area Content Description CalCube MiniLED Software name and logo and logo V2.1 Software version Device Connect the control system, camera and colorimeter devices. Target Obtain the original values of LED display, set the calibration target values, etc.

  • Page 8: Basic Calibration Procedure

    CalCube MiniLED Calibration User Manual Basic Calibration Procedure The basic calibration procedure includes setting up calibration environment, creating a calibration project, connecting devices, setting target values, analyzing camera parameters and enabling calibration. The main procedure is shown in the figure below.
  • Page 9 CalCube MiniLED Calibration User Manual Step 2 Connect the control system, calibration camera and colorimeter devices. Step 3 Collect the original values of the display and set the target values. Step 4 Set the partition information and adjust the camera parameters.
  • Page 10 CalCube MiniLED Calibration User Manual Step 5 Enable calibration. www.novastar.tech...

  • Page 11: Calibration Preparation

    NovaLCT control system, install NovaLCT on the control computer to control the LED display.  When the CalCube MiniLED software works with the Coex Computer control system, the software connects to the controller via Ethernet cable directly and no control computer is needed.

  • Page 12: System Architecture

    CalCube MiniLED Calibration User Manual 3.1.2 System Architecture Figure 3-1 System architecture - one computer used Figure 3-2 System architecture - two computers used Note: Before calibration, make sure that the calibration computer and graphics card have the same resolution ...

  • Page 13: Calibration Environment

    CalCube MiniLED Calibration User Manual When the CalCube MiniLED software works with the Coex control system, the software connects to the  controller via Ethernet cable directly and only one computer is enough. There is no distinction between control computer and calibration computer.

  • Page 14: Configure Software Environment

    When the CalCube MiniLED software works with the NovaLCT control system, network connection settings are required. When the CalCube MiniLED software works with the Coex control system, the software connects to the controller via Ethernet cable directly and there is no distinction between control computer and calibration computer.

  • Page 15: Jumbo Packet Settings

    CalCube MiniLED Calibration User Manual 3.2.3 Jumbo Packet Settings If you use the C3200 for calibration, the calibration computer requires jumbo packet settings. If you use the C1200, ignore this section. Step 1 Right-click the Computer icon on the desktop and select Manage to open the Computer Management page.

  • Page 16: Enable Novalct Monitoring

    Step 5 Click OK. Enable NovaLCT Monitoring If the CalCube MiniLED software works with the NovaLCT control system, listening settings are required. If the Coex control system is used, ignore this section. Step 1 Open NovaLCT and ensure good communication between the calibration computer and control computer.
  • Page 17 CalCube MiniLED Calibration User Manual Figure 3-6 Calibration button Step 4 On the Screen Calibration page, set Local IP and Port under Network Setting.  Local IP: Indicates the IP address of the control computer. This IP address and the IP address of the calibration computer must be on the same network segment.

  • Page 18: Enable Authorization

    CalCube MiniLED Calibration User Manual Enable Authorization The authorization management method of CalCube MiniLED is that a dongle and an authorization file are bond. A dongle corresponds to an authorization file. Both the dongle and authorization file are required. The authorization file can be obtained from the USB drive provided along with the software.

  • Page 19: Create A Calibration Project

    CalCube MiniLED Calibration User Manual Create a Calibration Project Step 1 Click the Screen Calibration button to open the project page. Step 2 (Optional) On the displayed Project page, change the project name. The project name defaults to "New_Screen_YearMonthDayHourMinuteSecond". The project name can contain Chinese characters, English letters, numbers and underlines.
  • Page 20 CalCube MiniLED Calibration User Manual Figure 4-2 Choosing image save path Step 5 Check whether the sizes of modules are the same. They are the same by default.  Same: Go to Step 6.  Different: Got to Step 7.

  • Page 21: Calibration Operation Instructions

    CalCube MiniLED Calibration User Manual Calibration Operation Instructions Device 5.1.1 Connect a Control System Coex Control System Step 1 Click Refresh and the Coex control system will be automatically connected. After successful connection, Coex will be displayed next to Control System in the status bar at the bottom.
  • Page 22 CalCube MiniLED Calibration User Manual Figure 5-2 Network setting in NovaLCT Step 2 On the Device page in CalCube MiniLED, enter the obtained information in the IP and Port boxes in the Control System area, and click Connect. After NovaLCT is successfully connected, NovaLCT will be displayed next to Control System in the status bar at the bottom.

  • Page 23: Connect A Camera

    C3200 and re-enabling it. The camera can be managed by using the tool that is installed together with CalCube MiniLED. For details, see Auxiliary Tool for C3200 Camera...

  • Page 24: Connect A Colorimeter

    CalCube MiniLED Calibration User Manual 5.1.3 Connect a Colorimeter The colorimeter is used to measure the brightness and chroma of the current screen. The tool is optional. The measured values are the original values of the LED screen. Step 1 Check whether a colorimeter is connected in the calibration environment.

  • Page 25: Set Target Values

    CalCube MiniLED Calibration User Manual Figure 5-4 Automatic measurement Note: To calibrate MiniLED screens, a colorimeter must be used to measure the original values. In this way, the calibration result can be better and the target values can be modified based on the calibration result after the calibration is complete.
  • Page 26 CalCube MiniLED Calibration User Manual Figure 5-5 Color space Figure 5-5, the white triangle represents the original color gamut, namely the original brightness and chroma values measured by the colorimeter. The black triangle represents the target color gamut. The figure above also shows the area of the current color gamut that will be lost after adjustment.

  • Page 27: Camera

    CalCube MiniLED Calibration User Manual Note: If you have enabled the Generate Target Values function on the Custom Procedure page, calibration coefficients will be generated based on the target values that are automatically generated by the software. The target colur gamut set by you will not take effect.

  • Page 28: Analyze Camera Parameters

    H: Indicates the vertical height of the selected partition. Note: Partition sizes may be uneven, which is normal and does not affect subsequent operations. 5.3.2 Analyze Camera Parameters The CalCube MiniLED software supports three calibration modes and they have different camera parameter adjustment methods. www.novastar.tech...

  • Page 29: Cob Calibration And Common Calibration

    CalCube MiniLED Calibration User Manual 5.3.2.1 COB Calibration and Common Calibration Figure 5-9 Analyzing camera parameters – COB calibration Step 1 On the Brightness Calibration tab page, follow the method below to adjust the camera settings. Both the C1200 and C3200 cameras are supported.
  • Page 30 CalCube MiniLED Calibration User Manual After you click , the software will automatically analyze and adjust the peak LED brightness to 40– 70 and the LED percentage to 20%–70%. If the two parameter values still do not meet the requirements, adjust the focus ring and aperture.

  • Page 31: Full-Grayscale Calibration

    CalCube MiniLED Calibration User Manual The adjustment method is the same as the above methods. After adjustment, click OK to save the adjustments. Figure 5-12 Advanced adjustment Step 7 Click the Chroma Calibration tab and repeat Step 2–Step 6 to finish the analysis and adjustment.
  • Page 32 CalCube MiniLED Calibration User Manual Adjust the ratio of image to viewport for the green color. Ensure the image of the screen is a rectangle in the center of the viewport and fills the entire viewport. There are different adjustment methods for different lens types.
  • Page 33 CalCube MiniLED Calibration User Manual  If a value is in red or a value cell has a red border, the value is abnormal. Go to Step Step 6 Switch to the Manually Adjust mode and adjust the abnormal values.

  • Page 34: Set Areas To Be Calibrated

    CalCube MiniLED Calibration User Manual Click to choose a color and view the collected image in that color. You can zoom in the image by clicking , entering a number, or pressing Ctrl and rolling the mouse wheel at the same time, to check whether the clarity of collected LEDs meet requirements.

  • Page 35: Calibration

    CalCube MiniLED Calibration User Manual Step 1 In the text box next to Top, enter the number of rows that are wrapped up. Step 2 Click View to check whether the information you set is correct. The LEDs for which you set bezel information will display the image in white on the LED screen.
  • Page 36 CalCube MiniLED Calibration User Manual Custom Figure 5-20 Custom configuration Step 1 Configure the number of procedures required.  Click Add to add a calibration procedure.  Click Delete to delete the current calibration procedure. Step 2 Select a calibration type.

  • Page 37: More Parameters

    CalCube MiniLED Calibration User Manual Optimize the display effect for the blue and white after calibration.  Generate Target Values Generate a set of target values automatically according to the screen's original brightness and chroma information and the target achievement ratio (95% by default) you set.
  • Page 38 CalCube MiniLED Calibration User Manual LED Positioning Parameters To obtain and calculate the brightness and chroma parameters of each LED to ensure the calibration effect, each LED must be positioned precisely. Figure 5-22 Preview of LED positioning Allowed Dead LED Ratio: To ensure the calibration effect, the ratio of LEDs that cannot be identified (dead LEDs) in the calibration area must be less than this ratio.
  • Page 39 CalCube MiniLED Calibration User Manual Uniformity Optimization Parameters Figure 5-23 Uniformity optimization parameters  White Brightness Preferred: If this function is enabled, the calculated white target value after calibration is consistent with the white target value set by the user. However, the screen uniformity may be affected. If this function is not enabled, screen brightness will be sacrificed to ensure the screen uniformity and the white target value will be changed.
  • Page 40 CalCube MiniLED Calibration User Manual Data Calibration Figure 5-24 Data calibration Calibrate the screen and collect data to improve the display effect after partition calibration of the COB screen, presenting a smoother transition between the spliced partitions. You can use either of the following two methods to obtain the calibration data.

  • Page 41: Partition Calibration

    CalCube MiniLED Calibration User Manual If this problem occurs after calibration, enable this function, regenerate calibration coefficients and upload them so that stripes can be removed directly. 5.4.3 Partition Calibration Prerequisites: When you have configured a custom procedure and the number of procedures is greater than 2, you need to return to the Camera page, select the procedure to be analyzed, and perform the camera parameter analysis manually before starting the calibration.
  • Page 42 CalCube MiniLED Calibration User Manual Figure 5-29 Manual calibration After a partition is calibrated, go to the Calibration page again, select the next partition to calibrate. Repeat these actions until the entire screen is calibrated. Preferred Calibration After you calibrate the first partition, go to the Calibration page again. Some preferred calibration partitions (in pink) will appear on the partition topology.
  • Page 43 CalCube MiniLED Calibration User Manual Figure 5-31 Continuing calibration Collect Calibration Data When the number of configured procedures is greater than or equal to 2 the Data Calibration function is selected by multiple procedures: If the Data Calibration function is selected on the More Params tab page, the calibration data collection page will pop up automatically after the first calibration procedure ends.
  • Page 44 CalCube MiniLED Calibration User Manual Step 5 (Optional) After the coefficients are generated, click on the Data Calibration area to download the generated calibration file. The file is saved to the desktop by default. Note: The C410 colorimeter is recommended. When you use other models of colorimeters, please install a shade tube for precise measurement.

  • Page 45: Border Correction

    CalCube MiniLED Calibration User Manual Figure 5-34 Target values (auto generated) 5.4.4 Border Correction If there are multiple partitions, perform border correction according to the order of Border Correction > Coef Simulation > Upload Coefs > Save Coefs to HW > Save Coefs. The system will eliminate the partition borders, upload coefficients, save parameters to hardware and save the adjustment data.

  • Page 46: Display Control

    CalCube MiniLED Calibration User Manual Figure 5-36 Coefficient simulation − Draw No.: Draw the partition No. on the simulation image. − Simulation Color: Select red, green or blue as the simulation color. − Display Mode: Set the display mode of the simulation image. You can select the best display mode based on your observation.

  • Page 47: Brightness Data

    CalCube MiniLED Calibration User Manual Step 1 After partition calibration, choose a color for the current partition on the screen to display. Step 2 Adjust the screen brightness by dragging the slider, clicking , or entering a number. Step 3 Select Enable Correction to view the post-calibration display effect in the selected color on the LED screen. At the same time, you can select or deselect Pixel-by-Pixel Display to view the calibration effect in pixel-by-pixel display mode and non-pixel-by-pixel display mode.
  • Page 48 CalCube MiniLED Calibration User Manual Figure 5-39 Changing target values  Chroma Coordinate Distribution: It is shown in a color space diagram and can be changed through one of the following two methods: − , drag the three vertexes in the diagram to change the target values.
  • Page 49 CalCube MiniLED Calibration User Manual Figure 5-40 Changing target values  Target Values: Double click to enter values directly, drag the Brightness Decay Percentage sliders or change the color temperature value to change the target values. If Generate Target Values is selected, after the first partition is calibrated, you can view and change the re- generated target values on this page.

  • Page 50: Help

    CalCube MiniLED Calibration User Manual Help Network Connection If the distance between the control computer that controls the LED screen and the calibration computer is within 100 meters during pixel level calibration, connect the computers with Ethernet cable. If the distance is greater than 100 meters, connect them wirelessly.

  • Page 51: Auxiliary Tool For C3200 Camera

    CalCube MiniLED Calibration User Manual Auxiliary Tool for C3200 Camera You can use the IP configuration tool that comes with the camera to manage the cameras. In the System list in the upper-left corner, you can see all the network adapters of the computer directly connected to the C3200 and which adapter the C3200 is connected to.

  • Page 52: Method Of Calibrating A 4K+ Screen

    When using a C3200 camera to calibrate a screen larger than 4K, it’s best to calibrate a 4K part each time to ensure the efficiency. If there is a difference in the curved-surface transitions between partitions after the calibration is completed, you need to deal with it by following CalCube MiniLED Ultra-Large Screen Calibration Technology Quick Start Guide.

  • Page 53: Troubleshooting

    CalCube MiniLED Calibration User Manual Troubleshooting View Partition Calibration Effect and Troubleshoot Problems Calibration effects of some areas may not be ideal. You need to troubleshoot the problems purposely based on the calibration effects. Before troubleshooting, follow the steps below to learn how to view camera collected image.

  • Page 54: Recollect And Reanalyze Some Images

    CalCube MiniLED Calibration User Manual Change the focal length. You can use different focal lengths to change or eliminate moiré pattern. Recollect and Reanalyze Some Images If the calibration effect is not satisfactory or the calibration cannot be carried out smoothly and recollection of some images is required, the custom configuration in the Procedure function can be used to precisely locate the images that need recollection.

  • Page 55: C3200 Camera Connection Failed

    CalCube MiniLED Calibration User Manual Figure 7-3 Custom procedure Step 4 Select colors of LEDs that you want to collect. In this example, select green and blue. Step 5 Click Specify next to Collect Green LEDs to specify the locations of the images to be collected.

  • Page 56: Camera Parameter Analysis Failed Due To Excessive Ambient Light

    CalCube MiniLED Calibration User Manual Figure 7-4 Advanced settings Step 2 Disable the network adapter that is connected to the C3200 and then enable the adapter again. Step 3 Click OK to go back to the Device page and click Connect under Camera to reconnect the C3200.
  • Page 57 CalCube MiniLED Calibration User Manual 3. Check whether the background image (_black.png) has lighted pixels or whether the collected color image (_y.png) does not have lighted pixels. 4. If yes to the above, check whether displaying image on screen during image collection is normal (after area positioning, observe whether the color and order of displaying image on screen are correct).

  • Page 58: Camera Parameter Analysis Failed Due To Area Positioning Distance

    CalCube MiniLED Calibration User Manual 5. Do camera parameter adjustment again. Camera Parameter Analysis Failed Due to Area Positioning Distance During camera parameter analysis, if a prompt saying “Camera parameter analysis failed. Please check: Whether the area positioning box borders are too far from the edges of the collected image.” is displayed and the prompt still exists after you make the distance shorter, follow the steps below to troubleshoot.
  • Page 59 CalCube MiniLED Calibration User Manual Figure 7-7 Actual columns and rows collected Step 3 If the number of lighted pixels on the screen during displaying image on screen is different from the number of actual collected columns and rows, reconfigure the screen in NovaLCT and ensure Sending Card Resolution and Graphics Output Resolution values are the same to avoid the problem of displaying image on screen.

  • Page 60: Calibrate The Display To A Specified Color Temperature

    CalCube MiniLED Calibration User Manual Step 4 Do camera parameter analysis again. Note: If camera parameter analysis failed and the error code is 0x1315, you also need to check whether Actual Columns Collected and Actual Rows Collected during displaying image on screen are correct.

  • Page 61: Remove Obvious Partition Merging Bands

    CalCube MiniLED Calibration User Manual Step 1 On the Calibration page, select the More Params tab. Figure 7-10 Uniformity optimization parameters Step 2 In the Uniformity Optimization Parameters area, adjust the target achievement ratio for the corresponding color.  For lower saturation, decrease the ratio for that color appropriately.
  • Page 62 CalCube MiniLED Calibration User Manual Figure 7-11 Expanded module rows/columns Step 2 Click Settings to open the settings page. Step 3 Based on the on-site situation, increase the values of Expanded Module Rows and Expanded Module Columns appropriately. Step 4 Click OK.

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