公开(公告)号：US11341879B2

公开(公告)日：2022-05-24

申请号：US17185237

申请日：2021-02-25

Applicant: Samsung Display Co., Ltd.

Inventor： Ranick Ng ,  Younghoon Song ,  Amir Amirkhany

IPC: G09G3/00 ,  G01R19/165

Abstract: A replica pixel for testing a display IC that includes a driving circuit that drives a display panel and a sensing circuit that senses a received current is presented. The replica pixel includes a replica pixel transistor, which has a first terminal switchably coupled to a power source, a gate coupled to a first node of a capacitor, and a second terminal coupled to a second node of the capacitor. The first node of the capacitor is switchably coupled to a reference voltage Vref. The second node of the capacitor is switchably coupled to a coupling node, wherein the coupling node selectively couples to either the driving circuit or the sensing circuit. The replica pixel is approximately a real pixel without the display element, and may be used to test the display IC without assembling the display IC with a display panel.

公开(公告)号：US20220130298A1

公开(公告)日：2022-04-28

申请号：US17185237

申请日：2021-02-25

Applicant: Samsung Display Co., Ltd.

Inventor： Ranick Ng ,  Younghoon Song ,  Amir Amirkhany

IPC: G09G3/00 ,  G01R19/165

Abstract: A replica pixel for testing a display IC that includes a driving circuit that drives a display panel and a sensing circuit that senses a received current is presented. The replica pixel includes a replica pixel transistor, which has a first terminal switchably coupled to a power source, a gate coupled to a first node of a capacitor, and a second terminal coupled to a second node of the capacitor. The first node of the capacitor is switchably coupled to a reference voltage Vref. The second node of the capacitor is switchably coupled to a coupling node, wherein the coupling node selectively couples to either the driving circuit or the sensing circuit. The replica pixel is approximately a real pixel without the display element, and may be used to test the display IC without assembling the display IC with a display panel.

公开(公告)号：US11081064B1

公开(公告)日：2021-08-03

申请号：US16869546

申请日：2020-05-07

Applicant: Samsung Display Co., Ltd.

Inventor： Amir Amirkhany ,  Younghoon Song ,  Ranick Ng

IPC: G09G3/3291 ,  H03M1/66 ,  H03F3/45

Abstract: A display compensation circuit includes a driver circuit including a digital-to-analog converter (DAC), the driver circuit configured to drive pixels of a display panel; and a compensation circuit including a current-mode sensing circuit and a reference current generator circuit, the compensation circuit configured to determine a value to compensate for pixel variations across the display panel, the reference current generator circuit configured to generate a reference current using the DAC of the driver circuit.

公开(公告)号：US20210217367A1

公开(公告)日：2021-07-15

申请号：US16869546

申请日：2020-05-07

Applicant: Samsung Display Co., Ltd.

Inventor： Amir Amirkhany ,  Younghoon Song ,  Ranick Ng

IPC: G09G3/3291 ,  H03M1/66

Abstract: A display compensation circuit includes a driver circuit including a digital-to-analog converter (DAC), the driver circuit configured to drive pixels of a display panel; and a compensation circuit including a current-mode sensing circuit and a reference current generator circuit, the compensation circuit configured to determine a value to compensate for pixel variations across the display panel, the reference current generator circuit configured to generate a reference current using the DAC of the driver circuit.