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Advanced Geometric Calibration

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Advanced calibration

When a single sensor is used on top of a smaller LCD/Screen you may need to use more than 4 calibration points in order to calibrate the points inside of the Touch Sensor active area.

Or when a single sensor is used on top of two or more LCDs, to overcome the bezel between the LCDs you may have to use more than 4 calibration points.

You can use 9, 16, 25, or 36 calibration points.

To open the ‘Advanced geometric calibration’ click on the ‘+’ button and more calibration points will be available.

 

You can now select the number of calibration points.

When you select the number of calibration points, they will be shown on all LCDs in use. The optimal calibration is the one in which the points on the different LCDs are positioned almost in the same relative position on the different LCDs. The user should assess which combination of points (9, 16, 25 or 36) offers a closer equidistance of points between the two or more LCDs to obtain an optimal sensor calibration.

After selecting the number of calibration points a black screen with the chosen calibration points will be displayed and an instruction will be presented ‘To start calibration, touch on the target until it disappears. Repeat the process for the remaining points’.

If some calibration targets are shown split between two or more LCDs, those calibration targets must be jumped (see example 1 and 2). Perform calibration point by point as normal, and when you arrive to a split calibration point press space to jump it. Then you can calibrate that point and continue with the calibration. Perform this action every time a calibration point is split between 2 displays.

Example 1 – one Touch Sensor on top of 2 LCDs

In this scenario, we may have calibration points split between the bezel of two LCDs.

Example 2 – one Touch Sensor on top of 4 LCDs

Make sure you touch on the target center.

The geometric calibration is successful if all targets have disappeared. If one calibration target fails, after about 2 seconds, it will reaper.

After touching all targets the Touch Sensor will be calibrated.

Advanced Calibration Drag Mode

Once possible uses for the ‘Advanced calibration’ drag mode is used when the active Touch Sensor area is smaller than the LCD.

The ‘DISPLAX Connect’ control panel will be displayed on the entire LCD screen, but since the Touch Sensor is smaller than the LCD you must define the area which is being covered by the Touch Sensor.

To start the calibration process of custom areas, click on the ‘Drag mode’ button, the one containing a squared drawing and an arrow.

Immediately after clicking on the ‘Drag mode’ button a message will be displayed ‘Please select the area’.

To select the area, click on the left button of the mouse at one of the Touch Sensor active upper corners, and then move the cursor on the diagonal towards the opposite lower corner of the Touch Sensor active grid. When you start selecting the area, you will notice a transition from a red area into a green area. A red area means that the area is too small for calibration.

When the selected area is enough to be calibrated, the selected area turns green.

>After lifting the finger from the left mouse button, an instruction message and four calibration points will be displayed – ‘To start calibration, touch on the target until it disappears. Repeat the process for the remaining points’.

By touching the displayed targets, you will be defining the Touch Sensor active area.

Note: When selecting a calibration area, an error message may be displayed ‘The selected area is invalid, please select again’.

This message can be displayed if you draw a very small area, in that case, a red rectangle will be displayed which will be immediately followed by the above error message.