APPARATUS FOR DETERMINING RESIDUAL IMAGE OF DISPLAY DEVICE AND METHOD FOR DETERMINING RESIDUAL IMAGE OF DISPLAY DEVICE

摘要

A device for measuring after image and a method thereof are provided to check the referred gradation of the determination, when measuring an after image. A display panel for being measured is prepared(S100). A test pattern comprises a first part including a first gradation, a second part including a second gradation which is placed having a gap against the first part, and a third part which covers the first, and the second parts. The test pattern of which gradation is continuously changed is displayed to the display panel(S200). The test pattern is maintained(S300). The after image of the display panel is measured(S400).