Display controller, display control method, and display control system for color space conversion

A display control method, comprising:

• receiving input color signals by a display controller;
• linearly amplifying all or part of the input color signals by a first factor by a color signal booster, and obtaining boosted color signals;
• loading a pre-stored 3D Lookup table (3D_LUT) from a 3D_LUT RAM by a computing unit;
• dividing the boosted color signals into three channels and storing the divided color signals on a color channel memory;
• comparing a point (r, g, b) of the divided color signals with lattice points of the 3D_LUT;
• based on the comparison result, determining whether or not to approximate the position of the point (r, g, b) among the lattice points;
• through tri-linear interpolation, approximating the position of the point (r, g, b) among the lattice points by the computing unit, after which the divided color signals turn into interpolated color signals;
• and
• linearly attenuating the interpolated color signals by a second factor by a color signal attenuator to obtain attenuated color signals.

A display control system, comprising a central processing unit, an image memory, and a display controller;

• wherein the central processing unit receives input data, and outputs data to the image memory, and the display controller,
• wherein the display controller comprises:
• a 3D_LUT random access memory, which stores at least a 3D Lookup table;
• and
• a display control processing unit, comprising:
• a computing unit, a register, a color signal booster, and a color signal attenuator;
• wherein after input color signals are received by the color signal booster, and the color signal booster linearly amplifies color signals by a first factor,
• wherein the computing unit calculates the address of the 3D Lookup table, and loads the 3D Lookup table from the 3D_LUT random access memory according to the register, and
• wherein the color signal attenuator linearly attenuates color signals by a second factor.