Backlight Unit High-Frequency Pulse Wave Color Leakage

The patent applies periodic pulse wave action to drive the backlight at high frequency (at least 360 Hz). By using periodic pulsing instead of continuous illumination, the system achieves both power savings and color accuracy. The high-frequency periodic action allows the different color lights to respond and stabilize within each pulse cycle, preventing color leakage while maintaining low average power consumption through the duty cycle control.

The patent changes the frequency parameter of the pulse wave to at least 360 Hz, which is sufficiently high to allow all color lights (with their different response characteristics) to complete their response cycles within each pulse period. This parameter change ensures that even colors with slower response times can stabilize before the next pulse begins, eliminating color leakage while maintaining the power-saving benefits of pulse wave driving.

The high-frequency periodic pulse wave (at least 360 Hz) enables brightness control and local dimming functionality while ensuring that each pulse is frequent enough for all color lights to respond completely. This periodic action at elevated frequency allows the system to maintain adaptability for brightness adjustment and local dimming techniques while eliminating color leakage issues that would occur at lower frequencies.

By changing the frequency parameter to at least 360 Hz, the system maintains the ability to perform dynamic brightness adjustment and local dimming through duty cycle control, while the high frequency ensures that color lights with different response characteristics all stabilize within each pulse cycle, preventing color leakage at moving object edges.

The patent employs periodic pulse wave action at a standardized high frequency of at least 360 Hz. This periodic approach provides a systematic solution that can be implemented using standard pulse wave generation techniques, avoiding the need for complex color-specific timing circuits. The regular periodic nature of the solution simplifies the driving circuit design compared to alternative approaches that would require individual timing control for each color channel.

The high-frequency pulse wave approach serves multiple functions simultaneously: it provides uniform driving for all color lights, enables power saving through duty cycle control, allows brightness adjustment, and prevents color leakage. This universal solution eliminates the need for separate complex control circuits for each color channel, reducing overall driving circuit complexity while achieving color accuracy.