Set the color and brightness for every RGB LED pixel in the LED control page. To illuminate one LED with default configuration, use the following procedure and see Figure 3-5.

1. Click the Enable button to enable the LP5860 in the software
2. Select the LED you want to control
3. Set a color for this LED
4. Click the VSync button to active this LED (The default is Mode 3 so the SYNC signal is necessary).

Device Configuration

To improve performance under different applications, first configure some key settings. Select the DEVICE CONFIGURATION button to show the detail setting slide, which is illustrated in Figure 3-6. Maximum current (MC) is set here. If a high maximum current is set, an external VLED supply is recommended. The Data Refresh Mode settings determine whether a SYNC signal is required to synchronize the PWM change for every LED dot. The Max Scan Lines controls select how many scan lines are active. For more information on the functions for other settings, see the LP5860 11 × 18 LED Matrix Driver with 8-bit Analog and 8-, 16-bit PWM Dimming Data Sheet.

When evaluating matrix-issue free performance, de-ghosting and low brightness compensation are configured here.

Custom LED Setting

Before setting color and brightness for RGB LED, one or multiple LEDs (Shift + select for multiple LED selections) must first be selected. In the CUSTOM tag, set the color in color selector on the right side, see Figure 3-7. Brightness is used to adjust the PWM for all 3 dots in one RGB LED. For some high requirement applications, dot current can adjust white balance for every RGB LED.

Global and Group Setting

Figure 3-8 illustrates the GLOBAL tab where color current for RGB groups and global PWM for all LED dots are set. Figure 3-9 illustrates the GROUP tab where every LED dot can be configured to 3 groups arbitrarily, while the PWM for the same group can be changed synchronously.

Fault Detection

The LP5860 continually detects the status for every LED dot. Once an open or short failure is detected, the fault status is also be monitored on the GUI. Clicking the warning bar near an abnormal LED shows the fault details, as illustrated in Figure 3-10. Clicking the fault summary at the right-top of the GUI shows the summary for all fault status (see Figure 3-11). The Clear Short LED and Clear open LED buttons are used to clear related fault flags when the failures are removed.

To have precise detection results, the current for every LED dot must be set above 0.5 mA and the PWM must be set above 25%, due to the parasitic capacitor induced from the LED matrix. A current that is too small leads to abnormal LSD results.