Color Uniformity Evaluation Model Based on Color Contrast Effect for Electronic Displays

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  • 色対比を考慮した電子ディスプレイ色むら評価モデル
  • イロ タイヒ オ コウリョ シタ デンシ ディスプレイイロムラヒョウカ モデル

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Abstract

This paper presents color uniformity evaluation model based on color contrast effect for electronic displays. Inspectors in production lines perform the evaluation, but the results depend on persons doing the inspection. In order to realize automatic evaluation, accurate evaluation algorithm that includes color contrast effects among color defects is strongly expected. The experiences of inspectors are analyzed, and some knowledge of color white uniformity inspection is introduced in this new evaluation model. In the new evaluation model, the total uniformity of a display consists of two kinds of effects. They are the effect of each color defect region itself and the mutual effect of color contrasts among defect regions. The relation of compensation colors makes the defects more noticeable. Pseudo color defects that hues and saturations are different are displayed on a CRT monitor. Human evaluations are performed by paired comparisons method. The human evaluation results were put in the equation of the evaluation model, and the coefficients of the equation were determined by the results of regression analysis, and the validity of the new white uniformity evaluation model was verified.

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