OLED Luminance Correction Using Combined Lower-Order Functions

The patent changes the parameter representation from a lookup table approach to a mathematical function approach. Instead of storing correction values in a table with high temperature resolution (which requires many entries and thus large circuit scale), the invention uses a function f(T) that calculates correction values dynamically based on temperature T. This allows achieving high correction precision without increasing circuit scale, as the function can be implemented with simple mathematical operations rather than large data structures.

The patent replaces the mechanical/table-based correction system with a mathematical function-based system. The traditional approach uses a correction table that requires storing many temperature-correction pairs, which translates to large circuit scale. The invention substitutes this with a function that computes correction values on-the-fly, replacing data storage with computational logic, thereby reducing circuit scale while maintaining precision.

The patent changes the mathematical approach from using complex higher-order functions to using simpler lower-order functions. Instead of fitting multiple display characteristics with high-order polynomials (which require many coefficients and thus increase processing load and power consumption), the invention uses lower-order functions that can be evaluated more efficiently. This reduces the number of calculations required while still achieving sufficient correction precision for multiple characteristics.

The patent applies partial correction using lower-order functions rather than attempting full correction with higher-order functions. By using simpler functions that provide sufficient correction for practical purposes, the invention avoids the excessive computational complexity of higher-order functions. This partial approach to correction achieves the necessary precision without the associated increase in processing load and power consumption.