Test method of display panel and test apparatus of display panel comprising real time test function of degraded pixel cell

• Main Authors: LEE JAE WOO, KIM GYU TAE, NAM SANG JIN, KIM DO YOON, KIM YEON SU, LEE KOOK JIN
• Format: Patent
• Language: English; Korean
• Published: 15.04.2022
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A method for inspecting a display panel is provided. The method for inspecting a display panel includes the steps of: preparing a display panel to be tested having a plurality of pixel cells; selecting a pixel cell to be tested from among the plurality of pixel cells included in the display panel to be tested; applying a test signal to the pixel cell to be tested; measuring an output signal of the pixel cell to be tested with respect to the test signal; and characterizing the amount of variation of the output signal according to time, deriving characterization information of the pixel cell to be tested, and determining whether or not deterioration occurs. 표시 패널의 검사 방법이 제공된다. 상기 표시 패널의 검사 방법은, 복수의 화소 셀을 갖는 피시험 표시 패널을 준비하는 단계, 상기 피시험 표시 패널에 포함된 상기 복수의 화소 셀 중에서 피시험 화소 셀을 선택하는 단계, 상기 피시험 화소 셀에 검사 신호를 인가하는 단계, 상기 검사 신호에 대한 상기 피시험 화소 셀의 출력 신호를 측정하는 단계, 및 시간에 따른 상기 출력 신호의 변동량을 특징화하여, 상기 피시험 화소 셀의 특징화 정보를 도출하고, 열화 여부를 판단하는 단계를 포함할 수 있다.