| CPC G09G 3/32 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0275 (2013.01); G09G 2320/0233 (2013.01)] | 13 Claims |
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1. A driving circuit, comprising a plurality of sub-pixels arranged in an array, wherein sub-pixels in two adjacent columns are connected to a same detection line for simultaneously detecting a corresponding driving current of any of the sub-pixels in the two adjacent columns;
wherein each driving current is configured to determine a corresponding compensation signal of corresponding two adjacent sub-pixels, for compensating data driving signals of the corresponding two adjacent sub-pixels based on the corresponding compensation signal in a display operation;
wherein each of the plurality of sub-pixels comprises:
a light-emitting element;
a pre-charging unit, connected to a data line to receive a data driving signal;
a driving unit, connected to the pre-charging unit and the light-emitting element; and
a detection unit, connected to the driving unit and the detection line;
a path control unit, connected between the driving unit and the light-emitting element;
wherein detection units of the sub-pixels in two adjacent columns are connected to the same detection line, and two adjacent sub-pixels are configured to simultaneously perform a detection operation; in the detection operation, a pre-charging unit of any of two adjacent sub-pixels is configured to receive a corresponding data driving signal of any of two adjacent sub-pixels through a corresponding data line connected thereto, a driving unit of any of the two adjacent sub-pixels is configured to generate a corresponding detection driving current of any of the two adjacent sub-pixels based on the corresponding data driving signal, and a detection unit of any of the two adjacent sub-pixels is configured to detect a detection driving current generated by the corresponding driving unit connected thereto, such that the display panel determines the corresponding compensation signal of the corresponding two adjacent sub-pixels based on corresponding driving currents of the corresponding two adjacent sub-pixels and compensates the data driving signals of the corresponding two adjacent sub-pixels based on the corresponding compensation signal; and in the detection operation, a path control unit of any of two adjacent sub-pixels is configured not to conduct a loop where a corresponding driving unit and a corresponding light-emitting element of any of two adjacent sub-pixels are located, and a corresponding detection unit of any of two adjacent sub-pixels is configured to detect the detection driving current generated by the corresponding driving unit connected thereto, and output a sum of the detection driving currents of the corresponding two adjacent sub-pixels through the detection line, such that the display panel determines the corresponding compensation signal of the corresponding two adjacent sub-pixels; in the display operation, a path control unit of any of the plurality of sub-pixels is configured to conduct the loop where a corresponding driving unit and a corresponding light-emitting element of any of the plurality of sub-pixels are located, and the corresponding driving unit is in a high-impedance state, the corresponding driving unit is configured to generate the corresponding display driving current of any of the plurality of sub-pixels based on the corresponding compensated data driving signal, and the corresponding display driving current flows through the corresponding light-emitting element of any of the plurality of sub-pixels through a conductive path control unit of any of the plurality of sub-pixels, to drive the corresponding light-emitting element to emit light;
in the display operation, a pre-charging unit of any of the plurality of sub-pixels is configured to receive the corresponding compensated data driving signal through the data line, and a driving unit of any of the plurality of sub-pixels is configured to generate a corresponding display driving current of any of the plurality of sub-pixels based on the corresponding compensated data driving signal to drive the light-emitting element to emit light;
the pre-charging unit comprises:
a first switch, comprising a first terminal, a second terminal, and a control terminal; wherein the first terminal of the first switch is connected to the data line, the second terminal of the first switch is connected to the driving unit, and the control terminal of the first switch is configured to receive a first scanning signal;
the driving unit comprises:
a second switch, comprising a first terminal, a second terminal, and a control terminal; wherein the first terminal of the second switch is connected to a first voltage source, the second terminal of the second switch is connected to the detection unit, and the control terminal of the second switch is connected to the pre-charging unit; and
a capacitor, comprising a first terminal and a second terminal; wherein the first terminal of the capacitor is connected to the first terminal of the second switch, and the second terminal of the capacitor is connected to the control terminal of the second switch;
the detection unit comprises:
a third switch, comprising a first terminal, a second terminal, and a control terminal; wherein the first terminal of the third switch is connected to the driving unit, the second terminal of the third switch is connected to the detection line, and the control terminal of the third switch is configured to receive a second scanning signal;
the path control unit comprises:
a fourth switch, comprising a first terminal, a second terminal, and a control terminal; wherein the first terminal of the fourth switch is connected to the driving unit, the second terminal of the fourth switch is connected to the light-emitting element, and the control terminal of the fourth switch is configured to receive a control signal;
wherein in a pre-charging phase of the detection operation, in each of the two adjacent sub-pixels, the first scanning signal thereof is at a high voltage, the first switch thereof is turned on, the data line thereof outputs the data driving signal, and the data driving signal is written to a first node thereof through the first switch, the first node is defined by a connection point between the driving unit thereof and the pre-charging unit thereof; at this time, the second scanning signal thereof is at a low voltage, and the third switch thereof is turned off, the fourth switch thereof receives the control signal and is in a non-conductive state after, and no current flows through a second node thereof, the second node is defined by a connection point between the driving unit thereof and the detecting unit thereof;
in a detection stage of the detection operation, in each of the two adjacent sub-pixels, the first scanning signal thereof is at a low voltage, the first switch thereof is turned off, the data driving signal of the first node thereof is stored in the capacitor thereof, and at this time, the second scanning signal thereof is at a high voltage, the third switch thereof is turned on, and the second switch thereof is in a conductive state under the control of the data driving signal, and a current flows through the second node thereof, and the current is detection driving current; the detection unit thereof is conductive based on the second scanning signal to output a sum of the detection driving currents of the two adjacent sub-pixels to the driving chip through the detection line; at this time, the fourth switch thereof receives the control signal and is still in a non-conductive state after receiving, and the light-emitting element does not emit light.
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