Dither Matrix Reference Position Adjustment for LED Uniformity

The patent applies dynamics by making the dither matrix reference position variable rather than fixed. The reference position is dynamically adjusted based on the cumulative lighting frequency of light emitting elements, allowing the system to adapt to degradation patterns over time without introducing positional deviations. This resolves the contradiction by eliminating the need for dummy pixels while maintaining both lighting uniformity and positional accuracy.

The patent changes the parameter of dither matrix reference position from a fixed value to a variable value that depends on element usage history. By adjusting the reference position according to cumulative lighting frequencies, the system achieves lighting uniformity without the positional deviation caused by dummy pixel addition. This parameter change allows the same physical array to behave differently across pages to compensate for element degradation.

The patent implements periodic action by cycling through different dither matrix reference positions based on cumulative lighting frequencies. Instead of continuous uniform usage, the system periodically shifts which elements are activated, creating a rotating usage pattern that prevents any single element from continuous degradation while maintaining high printing output.

The system performs self-service by automatically adjusting dither matrix reference positions based on measured lighting frequencies. The control unit monitors element performance and autonomously redistributes usage without external intervention, extending element lifespan while maintaining productivity through adaptive reallocation of lighting tasks.