Pixel unit circuit, method for driving the same, and pixel circuit
地域：
Beijing
摘要
A pixel unit circuit, a driving method of the pixel unit circuit, and a pixel circuit are provided. The pixel unit circuit includes at least one sub-pixel sub-unit circuit connected to display signal lines and display signal terminals; and pixel compensation sub-unit circuit connected to two compensation signal lines and at least one compensation signal terminal, wherein one of the display signal lines and one of the compensation signal lines are a same signal line, and/or one of the display signal terminals and one of the at least one compensation signal terminal are a same signal terminal, and/or the pixel unit circuit further includes a multiplexer sub-circuit, one of the display signal lines is connected to a first terminal of the multiplexer sub-circuit, one of the compensation signal lines is connected to a second terminal of the multiplexer sub-circuit.
說明書
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The present application claims a priority of a Chinese patent application No. 201711190111.3 filed in China on Nov. 24, 2017, a disclosure of which is incorporated herein in its entirety by reference.
The present disclosure relates to a field of a display technology, and specifically relates to a pixel unit circuit, a method for driving the pixel unit circuit, and a pixel circuit.
A relevant optical pixel compensation circuit needs more leading wires and more circuit elements while normal displaying is achieved, and is incapable of achieving a high PPI (Pixel Per Inch).
A pixel unit circuit, a method for driving the pixel unit circuit, and a pixel circuit is provided.
權(quán)利要求
What is claimed is:1. A pixel unit circuit, comprising:at least one sub-pixel sub-unit circuit and a pixel compensation sub-unit circuit, wherein the at least one sub-pixel sub-unit circuit is connected to at least two display signal lines and at least two display signal terminals, the pixel compensation sub-unit circuit is connected to at least two compensation signal lines and at least one compensation signal terminal, the at least two display signal lines comprise a first gate line and a data line; the at least two compensation signal lines comprise a second gate line and a reading line; and the pixel unit circuit further comprises a multiplexer sub-circuit, the data line is connected to a first input terminal of the multiplexer sub-circuit, the reading line is connected to a second input terminal of the multiplexer sub-circuit and an output terminal of the multiplexer sub-circuit is connected to a control circuit outside the pixel unit circuit. 2. The pixel unit circuit according to claim 1 , wherein each of the at least one sub-pixel sub-unit circuit comprises a data writing sub-circuit, a driving transistor, and a light emitting element; the pixel compensation sub-unit circuit comprises a reading control sub-circuit and a photosensitive sub-circuit configured to convert light emitted from the light emitting element to an electric signal;the at least two display signal terminals comprise a first voltage input terminal and a second voltage input terminal; the at least one compensation signal terminal comprises a third voltage input terminal; the data writing sub-circuit is connected to the first gate line, the data line and a gate electrode of the driving transistor a first electrode of the driving transistor is connected to the first voltage input terminal, a second electrode of the driving transistor is connected to a first electrode of the light emitting element, and a second electrode of the light emitting element is connected to the second voltage input terminal; the reading control sub-circuit is connected to the second gate line, the reading line and a first terminal of the photosensitive sub-circuit; a second terminal of the photosensitive sub-circuit is connected to the third voltage input terminal. 3. The pixel unit circuit according to claim 2 , wherein the pixel compensation sub-unit circuit further comprises a compensation control sub-circuit, the compensation control sub-circuit is connected to the reading line and is connected to a data driving sub-circuit connected to the data line;the compensation control sub-circuit is configured to read an electrical signal in the reading line, compare a value of the electrical signal with a pre-determined electrical signal value, determine whether a voltage in the data line needs to be adjusted or not according to a result of the comparison; and in case that the voltage in the data line needs to be adjusted, the compensation control sub-circuit is configured to send a data voltage adjustment signal to the data driving sub-circuit so that the data driving sub-circuit obtains the data voltage adjustment signal; the data driving sub-circuit is configured to adjust a data voltage to be outputted to the data line according the data voltage adjustment signal and obtain an adjusted data voltage, and send the adjusted data voltage to the at least one sub-pixel sub-circuit through the data line. 4. The pixel unit circuit according to claim 2 , wherein the second voltage input terminal and the third voltage input terminal are a same voltage input terminal;both the second voltage input terminal and the third voltage input terminal are low voltage input terminals; the photosensitive sub-circuit comprises a photosensitive diode, an anode of the photosensitive diode is connected to the third voltage input terminal, and a cathode of the photosensitive diode is connected to the reading control sub-circuit. 5. The pixel unit circuit according to claim 2 , wherein the first voltage input terminal and the third voltage input terminal are a same voltage input terminal;both the first voltage input terminal and the third voltage input terminal are high voltage input terminals; the photosensitive sub-circuit comprises a photosensitive diode, a cathode of the photosensitive diode is connected to the third voltage input terminal, and an anode of the photosensitive diode is connected to the reading control sub-circuit. 6. The pixel unit circuit according to claim 2 , wherein the first gate line and the second gate line are a same gate line. 7. The pixel unit circuit according to claim 2 , wherein, the data writing sub-circuit comprises a first transistor and a capacitor, a gate electrode of the first transistor is connected to the first gate line, a first electrode of the first transistor is connected to the data line, a second electrode of the first transistor is connected to a gate electrode of the driving transistor; a first electrode plate of the capacitor is connected to the gate electrode of the driving transistor, and a second electrode plate of the capacitor is connected to the second electrode of the driving transistor;the reading control sub-circuit comprises a second transistor, a gate electrode of the second transistor is connected to the second gate line, a first electrode of the second transistor is connected to the reading line, a second electrode of the second transistor is connected to the first electrode of the photosensitive sub-circuit. 8. The pixel unit circuit according to claim 1 , wherein a quantity of the at least one sub-pixel sub-unit circuit comprised in the pixel unit circuit is at least two;the pixel unit circuit further comprises a display control sub-circuit; the display control sub-circuit is configured to control the at least two sub-pixel sub-unit circuits comprised in the pixel unit circuit to emit light at different time periods. 9. A pixel circuit, comprising:a plurality of pixel unit circuits according to claim 1 , wherein the plurality of pixel unit circuits is arranged in a matrix including multiple rows and multiple columns. 10. The pixel circuit according to claim 9 , wherein the at least two compensation signal lines comprise a second gate line and a reading line;pixel compensation sub-unit circuits comprised in a same row of the multiple rows of pixel unit circuits in the plurality of pixel unit circuits are connected to a same second gate line; pixel compensation sub-unit circuits comprised in a same column of the multiple columns of pixel unit circuits in the plurality of pixel unit circuits are connected to a same reading line. 11. A pixel circuit, comprising:a plurality of pixel unit circuits according to claim 1 , wherein the plurality of pixel unit circuits is arranged in a matrix including multiple rows and multiple columns; and the control circuit comprises a compensation control sub-circuit and a data driving sub-circuit connected to the compensation control sub-circuit; wherein the compensation control sub-circuit is connected to the reading line through the multiplexer sub-circuit, the data driving sub-circuit is connected to the data line through the multiplexer sub-circuit; the compensation control sub-circuit is configured to read an electrical signal in the reading line, compare a value of the electrical signal with a pre-determined electrical signal value, determine whether a voltage in the data line needs to be adjusted or not according to a result of the comparison; and in case that the voltage in the data line needs to be adjusted, the compensation control sub-circuit is configured to send a data voltage adjustment signal to the data driving sub-circuit so that the data driving sub-circuit obtains the data voltage adjustment signal; the data driving sub-circuit is configured to adjust a data voltage to be outputted to the data line according the data voltage adjustment signal and obtain an adjusted data voltage, and send the adjusted data voltage to the at least one sub-pixel sub-circuit. 12. A method for driving the pixel unit circuit according to the claim 1 , wherein each of the at least one sub-pixel sub-unit circuit comprised in the pixel unit circuit comprises a light emitting element, the pixel compensation sub-unit circuit comprises a reading control sub-circuit and a photosensitive sub-circuit configured to convert light emitted by the light emitting element to an electrical signal; a compensation control sub-circuit is connected to a data driving sub-circuit, the data driving sub-circuit is configured to supply a data voltage to a data line connected to each of the at least one sub-pixel sub-unit circuit; wherein a compensation time stage is provided between two display time stages, the compensation time stage comprises a reading time sub-stage corresponding to the pixel compensation sub-unit circuit, the method for driving the pixel unit circuit comprises:obtaining a predetermined brightness corresponding to a predetermined data voltage according to a gamma curve of the at least one sub-pixel sub-unit circuit, and converting the predetermined brightness to a predetermined electrical signal value according to photoelectric conversion parameters of the photosensitive sub-circuit; sensing, by the photosensitive circuit, light emitted from the light emitting element in the sub-pixel sub-unit circuit, and converting the light to an electrical signal corresponding to the light; in the reading time sub-stage, controlling, by the reading control sub-circuit, the photosensitive sub-circuit to be connected to the reading line so that the electrical signal is transferred from the photosensitive sub-circuit to the compensation control sub-circuit through the reading line; detecting, by the compensation control sub-circuit, a value of the electrical signal, comparing the value of the electrical signal with the predetermined electrical signal value, determining whether a data voltage in the data line needs to be adjusted or not according to a result of the comparison; and in case that the data voltage in the data line needs to be adjusted, sending, by the compensation control sub-circuit, a data voltage adjustment signal to the data driving sub-circuit so that the data driving sub-circuit adjusts the data voltage to be outputted to the data line and obtains an adjusted data voltage; and transmitting, by the data driving sub-circuit through the data line, the adjusted data voltage to one of the at least one sub-pixel sub-unit circuit connected to the data line. 13. The method according to claim 12 , wherein the electrical signal comprises at least one of an electrical voltage signal, an electrical current signal or an electric charge signal;the value of the electrical signal comprises at least one of an electrical voltage value, an electrical current value or an electric charge amount. 14. The method according to claim 12 , wherein each of the at least one sub-pixel sub-unit circuit further comprises a data writing sub-pixel and a driving transistor the at least two display signal lines comprise a first gate line and a data line; the at least two compensation signal lines comprise a second gate line and a reading line; the data writing sub-circuit is connected to the first gate line, the data line and a gate electrode of the driving transistor; the reading control sub-circuit is connected to the second gate line, the reading line and a first terminal of the photosensitive sub-circuit; the first gate line and the second gate line are a same gate line; the method further comprises:in one of the display time stages in which a voltage in the reading line is a low level, controlling, by the data writing sub-circuit under a control of the first gate line, a data voltage in the data line to be written into the gate electrode of the driving transistor, and controlling, by the reading control sub-circuit, the first terminal of the photosensitive sub-circuit to be connected to the reading line so that an electrical potential of the first terminal of the photosensitive sub-circuit is reset; in the reading time sub-stage after the display time stage, controlling, by the reading control sub-circuit, the photosensitive sub-circuit to be connected to the reading line so that the electrical signal is transferred from the photosensitive sub-circuit to the compensation control sub-circuit through the reading line. 15. The method according to claim 12 , wherein, in the reading time sub-stage after the display time stage, controlling, by the reading control sub-circuit, the photosensitive sub-circuit to be connected to the reading line so that the electrical signal is transferred from photosensitive sub-circuit to the compensation control sub-circuit through the reading line, specifically comprises:in the reading time sub-stage, controlling, by the reading control sub-circuit, a first terminal of the photosensitive sub-circuit to be connected to the reading line so that the electrical signal is transferred from the photosensitive sub-circuit to the compensation control sub-circuit through the reading line. 16. The method according to claim 12 , wherein, the at least one sub-pixel sub-unit circuit further comprises a data writing sub-circuit and a driving transistor the at least two display signal lines comprise a first gate line and the data line; the at least two compensation signal lines comprise a second gate line and the reading line; the data writing sub-circuit is connected to the first gate line, the data line and a gate electrode of the driving transistor; the reading control sub-circuit is connected to the second gate line, the reading line and a first terminal of the photosensitive circuit; the pixel unit circuit comprises a multiplexer circuit; the data line is connected to a first input terminal of the multiplexer sub-circuit; the reading line is connected to a second input terminal of the multiplexer sub-circuit; an output terminal of the multiplexer sub-circuit is connected to a control circuit outside the pixel unit circuit; the compensation control sub-circuit and the data driving sub-circuit are arranged in the control circuit; the compensation control sub-circuit is connected to the reading line through the multiplexer sub-circuit;in the reading time sub-stage, controlling, by the reading control sub-circuit, the photosensitive sub-circuit to be connected to the reading line so that the electrical signal is transferred from the photosensitive sub-circuit to the compensation control sub-circuit through the reading line, comprises: in the reading time sub-stage, controlling, by the multiplexer sub-circuit, the reading line to be connected to the control circuit, so that the electrical signal is transferred from the photosensitive sub-circuit to the compensation control sub-circuit in the control circuit through the reading line; and after the data driving sub-circuit obtains the adjusted data voltage, the method further comprises: controlling, by the multiplexer sub-circuit, the reading line and the control circuit to be disconnected with each other, and controlling, by the multiplexer sub-circuit, the control circuit and the data line to be connected to each other, and transmitting, by the data driving sub-circuit, the adjusted data voltage to the at least one sub-pixel sub-unit circuit through the data line.
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