Mura inspection device for compressing mura data through dimensionality reduction, operating method, and display system including the same

A display system comprising:

• a display device including a display region;
• and
• a mura inspection device,
• wherein the mura inspection device is configured to:
• measure luminance of the display region to generate a first luminance matrix including a plurality of first elements respectively having a plurality of raw luminance values;
• detect a distortion region of the display region in relation to the first luminance matrix;
• adjust luminance of the distortion region to generate a second luminance matrix;
• generate a mura matrix in relation to a difference between the second luminance matrix and a reference value;
• generate encoding data by applying dimensionality reduction to the mura matrix;
• and
• communicate the encoding data to the display device,
• wherein the mura inspection device is further configured to identify a first element among the plurality of first elements as a distorted element of the first luminance matrix corresponding to the distortion region, the identified first element having a raw luminance value less than a first luminance value,
• wherein, when the raw luminance value of the distorted element of the first luminance matrix is greater than or equal to a second luminance value less than the first luminance value, the mura inspection device is further configured to
• calculate an average luminance value of a column including the distorted element of the first luminance matrix,
• calculate a convergence luminance value for the plurality of first elements, and
• determine a pre-processed luminance value corresponding to a distorted element of the second luminance matrix in relation to a difference between the average luminance value and the convergence luminance value, and
• wherein the distorted element of the second luminance matrix corresponds to the distorted element of the first luminance matrix.

A method of operating a mura inspection device measuring luminance of a display region, the method comprising:

• generating a first luminance matrix of the display region, wherein the first luminance matrix includes a plurality of first elements respectively having, a plurality of raw luminance values;
• detecting a distortion region of the display region in relation to the first luminance matrix;
• adjusting a luminance of the distortion region to generate a second luminance matrix;
• generating a mura matrix in relation to a difference between the second luminance matrix and a reference value;
• generating encoding data by applying dimensionality reduction to the mura matrix;
• wherein the detecting comprises identifying a first element among the plurality of first elements as a distorted element of the first luminance matrix corresponding to the distortion region, the identified first element having a raw luminance value less than a first luminance value,
• wherein, when the raw luminance value of the distorted element of the first luminance matrix is greater than or equal to a second luminance value less than the first luminance value, the method further comprises
• calculating an average luminance value of a column including the distorted element of the first luminance matrix,
• calculating a convergence luminance value for the plurality of first elements, and
• determining a pre-processed luminance value corresponding to a distorted element of the second luminance matrix in relation to a difference between the average luminance value and the convergence luminance value, and
• wherein the distorted element of the second luminance matrix corresponds to the distorted element of the first luminance matrix.