Output Buffer Circuit With Dynamic Tail Current for Display Slew Rate

The patent implements dynamic adjustment of tail current based on gray code values. The tail current magnitude changes dynamically according to the specific gray code transition required, allowing the circuit to provide high current only when needed for fast transitions while consuming less power during other operations. This resolves the contradiction by making the power consumption adaptive rather than constant.

The patent changes the tail current parameter based on the gray code input. Different gray code combinations trigger different tail current magnitudes, optimizing the balance between transition speed and power consumption for each specific transition case. This parameter adaptation allows the circuit to achieve fast transitions when necessary while minimizing power consumption during normal operation.

The tail current is made dynamic rather than fixed. The circuit automatically adjusts the tail current magnitude based on the detected gray code transition, providing higher current for transitions requiring faster slew rates and lower current for transitions that can tolerate slower rates. This dynamic adaptation enables both high slew rate capability and optimization for specific gray code transitions.

Different parts of the circuit (different tail current paths) are configured with different current magnitudes suited for different gray code transitions. Each gray code combination can activate a specific tail current level, providing locally optimized performance for each transition type rather than a uniform approach.

The tail current parameter is changed dynamically based on the gray code input values. The circuit selects appropriate current magnitudes from multiple available levels, matching the current to the specific transition requirements. This prevents wasteful high current consumption during transitions that do not require fast switching while ensuring adequate speed when needed.

The tail current is applied periodically or selectively based on transition requirements rather than continuously. The circuit activates appropriate current levels only during the periods when gray code transitions occur, and deactivates or reduces current during stable states, minimizing overall energy loss while maintaining transition performance.