LED Light Emitting Cells with Different Sizes for AC Flicker Reduction

The patent applies local quality by forming light emitting cells with different sizes (first size and second size) in different regions of the substrate. Specifically, light emitting cells in a first region have a first size while light emitting cells in a second region have a second size, creating spatial variation in cell dimensions. This results in different turn-on voltages for cells of different sizes, causing them to turn on at different times during AC cycles and thereby reducing the flicker phenomenon while maintaining manufacturing feasibility.

The patent implements local quality by creating regions with different light emitting cell sizes. Light emitting cells in the first region have a first size while those in the second region have a second size. This spatial differentiation causes cells in different regions to have different turn-on voltages, so when AC power is applied to the parallel rows with opposite polarities, the cells turn on at different times rather than simultaneously, reducing flicker while maintaining AC power adaptability.

The patent applies local quality by forming light emitting cells with different sizes in different regions, which naturally results in different turn-on voltages for cells in different regions. This eliminates the need for complex control circuits to stagger the turn-on timing, as the size variation inherently creates the desired sequential turn-on behavior. Thus, the system maintains simple operation while achieving flicker reduction and improved reliability.