LED Cluster Backlight Assembly for LCD Heat Management

The patent divides the LED array into multiple independently controllable clusters or strings, where each cluster can be individually strobed. This segmentation allows for better heat management by enabling intermittent operation of individual clusters, reducing continuous heat accumulation while maintaining compact overall device dimensions.

The patent implements periodic strobing of LED clusters where LEDs are activated in alternating sequences rather than continuously. By controlling clusters to flash in alternating patterns (e.g., odd clusters then even clusters), the system reduces average heat generation while maintaining perceived brightness, thus resolving the contradiction between compact size and heat management.

The patent applies periodic strobing specifically to red LED clusters, activating them in alternating sequences with other color clusters. This periodic operation allows red LEDs to achieve sufficient cumulative brightness for good color rendering while reducing their continuous operation time, thereby lowering heat accumulation and extending their operational lifespan.

The patent adjusts the strobe duty cycle and timing parameters of red LEDs to optimize the balance between brightness output and heat generation. By carefully controlling the duration and frequency of red LED activation, the system achieves adequate color rendering performance while maintaining LED lifespan through reduced thermal stress.