Voltage drop compensation method and device thereof, display device
First Claim
1. A voltage drop compensation method, adapted for a display panel, the display panel comprising a plurality of rows of pixels, and the plurality of rows of pixels comprising at least one pixel row to be compensated,wherein the voltage drop compensation method comprises:
 obtaining an impedance distribution of the plurality of rows of pixels, and constructing a voltage drop model based on the impedance distribution of the plurality of rows of pixels;
obtaining a sourceend input current of the display panel, where the sourceend input current refers to a total current before the total current is shunt into the plurality of rows of pixels;
determining an input value of the voltage drop model based on the sourceend input current, and determining at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model; and
determining, according to the at least one voltage drop, at least one compensation grayscale which is in onetoone correspondence with the at least one pixel row to be compensated respectively and performing grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale;
wherein determining the input value of the voltage drop model based on the sourceend input current comprises;
judging whether or not the sourceend input current is greater than a current threshold; and
taking the sourceend input current as the input value of the voltage drop model in a case where the sourceend input current is greater than the current threshold.
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Abstract
A voltage drop compensation method and a device thereof, and a display device are disclosed. The voltage drop compensation method includes: obtaining an impedance distribution of the plurality of rows of pixels, and constructing a voltage drop model based on the impedance distribution of the plurality of rows of pixels; obtaining a sourceend input current of the display panel; determining an input value of the voltage drop model based on the sourceend input current, and determining at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value; and determining, according to the at least one voltage drop, at least one compensation grayscale which is in onetoone correspondence with the at least one pixel row to be compensated respectively and performing grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale.
6 Citations
18 Claims

1. A voltage drop compensation method, adapted for a display panel, the display panel comprising a plurality of rows of pixels, and the plurality of rows of pixels comprising at least one pixel row to be compensated,
wherein the voltage drop compensation method comprises: 
obtaining an impedance distribution of the plurality of rows of pixels, and constructing a voltage drop model based on the impedance distribution of the plurality of rows of pixels; obtaining a sourceend input current of the display panel, where the sourceend input current refers to a total current before the total current is shunt into the plurality of rows of pixels; determining an input value of the voltage drop model based on the sourceend input current, and determining at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model; and determining, according to the at least one voltage drop, at least one compensation grayscale which is in onetoone correspondence with the at least one pixel row to be compensated respectively and performing grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale; wherein determining the input value of the voltage drop model based on the sourceend input current comprises; judging whether or not the sourceend input current is greater than a current threshold; and taking the sourceend input current as the input value of the voltage drop model in a case where the sourceend input current is greater than the current threshold.  View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)


12. A voltage drop compensation device, configured to perform compensation on a display panel, the display panel comprising a plurality of rows of pixels, and the plurality of rows of pixels comprising at least one pixel row to be compensated,
wherein the voltage drop compensation device comprises: 
a current sensor, configured to detect a sourceend input current of the display panel; a voltage drop determining module connected to the current sensor, comprising a voltage drop model constructed based on an impedance distribution of the plurality of rows of pixels, and configured to determine an input value of the voltage drop model based on the sourceend input current, and determine at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model; and a grayscale compensation module connected to the voltage drop determining module, configured to determine, according to the at least one voltage drop, at least one compensation grayscale which is in onetoone correspondence with the at least one pixel row to be compensated respectively, and to perform grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale; wherein the voltage drop determining module is configured to; judge whether or not the sourceend input current is greater than a current threshold; and take the sourceend input current as the input value of the voltage drop model in a case where the sourceend input current is greater than the current threshold.  View Dependent Claims (13, 14, 15, 16, 17)


18. A display device, comprising a display panel and a voltage drop compensation device,
wherein the voltage drop compensation device is configured to perform compensation on the display panel, the display panel comprises a plurality of rows of pixels, and the plurality of rows of pixels comprises at least one pixel row to be compensated, the voltage drop compensation device comprises: 
a current sensor, configured to detect a sourceend input current of the display panel; a voltage drop determining module connected to the current sensor, comprising a voltage drop model constructed based on an impedance distribution of the plurality of rows of pixels, and configured to determine an input value of the voltage drop model based on the sourceend input current, and determine at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model; and a grayscale compensation module connected to the voltage drop determining module, configured to determine, according to the at least one voltage drop, at least one compensation grayscale which is in onetoone correspondence with the at least one pixel row to be compensated respectively, and perform grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale; wherein the voltage drop determining module is configured to; judge whether or not the sourceend input current is greater than a current threshold; and take the sourceend input current as the input value of the voltage drop model in a case where the sourceend input current is greater than the current threshold.

1 Specification