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公开(公告)号：US12046167B2
公开(公告)日：2024-07-23
申请号：US16512990
申请日：2019-07-16
Inventor： Hoon Sohn , Sangwoo Choi , Minsang Koo , Sanghyuk Kwon , Eunchul Shin , Woojin Jung , Jiho Park , Soonkyu Hwang
IPC: G01N25/72 , G01N21/17 , G01N21/95 , G01N21/956 , G09G3/00
CPC classification number: G09G3/006 , G01N21/171 , G01N21/95607 , G01N25/72 , G01N2021/95615
Abstract: An apparatus for inspecting a display panel for defects includes a table which supports the display panel, a laser excitation unit that irradiates a non-display area of the display panel with a point laser beam, a thermal wave detecting unit that generates thermal wave images of irradiated portions of the non-display area, a driving unit, and a control unit. A groove corresponding to an edge of the display panel may be defined in a top surface of the table. A defect, such as a crack, may be detected by comparing a defect pattern obtained from the thermal wave images with a pre-registered defect pattern.
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公开(公告)号：US10565953B2
公开(公告)日：2020-02-18
申请号：US15796133
申请日：2017-10-27
Applicant: Samsung Display Co., Ltd.
Inventor： Jung-taek Kim , Sangwoo Choi
IPC: G09G3/36
Abstract: A display device includes a display panel including a gate driving circuit which drives gate lines, a data driving circuit which drives data lines based on an image data signal and a driving reference voltage, and a driving controller which controls the gate driving circuit in response to an image signal and a control signal and provides the image data signal and the driving reference voltage to the data driving circuit. The driving controller generates a data enable signal having a display section and a blank section in one frame based on the control signal, and when a difference between a time length of the blank section of a current frame and a time length of the blank section of a previous frame is greater than a reference value, changes the driving reference voltage to a voltage level corresponding to a current frame frequency.
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