Temperature compensation method and device, and display apparatus

1. A temperature compensation method for a display apparatus, comprising:

determining, according to a photoelectric display signal of the display apparatus and/or an anode voltage signal of a light emitting device in the display apparatus, a temperature value of a driving transistor corresponding to the light emitting device in the display apparatus;

determining, according to the temperature value of the driving transistor, a preset correspondence relationship between temperatures and electrical parameters of the driving transistor, and a reference electrical parameter, an electrical parameter offset of the driving transistor; and

determining, according to the electrical parameter offset, a temperature compensation value for a data line signal corresponding to the driving transistor in the display apparatus,

wherein the electrical parameter of the driving transistor comprises a mobility and a threshold voltage, the reference electrical parameter comprises a reference mobility and a reference threshold voltage, and determining an electrical parameter offset of the driving transistor according to the temperature value of the driving transistor, a preset correspondence relationship between temperatures and electrical parameters of the driving transistor, and a reference electrical parameter comprises:

determining a real-time mobility corresponding to the temperature value of the driving transistor according to a preset correspondence relationship between temperatures and mobilities;

determining a real-time threshold voltage corresponding to the temperature value of the driving transistor according to a preset correspondence relationship between temperatures and threshold voltages;

determining a mobility offset of the driving transistor according to the reference mobility and the real-time mobility; and

determining a threshold voltage offset of the driving transistor according to the reference threshold voltage and the real-time threshold voltage,

wherein the electrical parameter offset comprises the mobility offset and the threshold voltage offset.

2. The temperature compensation method according to claim 1 , wherein determining a temperature value of the driving transistor comprises:

determining a first full screen temperature according to brightness signals of the display apparatus or driving current signals of respective driving transistors in the display apparatus;

determining an internal sensed temperature of the driving transistor according to the anode voltage signal of the light emitting device; and

determining the temperature value of the driving transistor according to the first full screen temperature and/or the internal sensed temperature.

3. The temperature compensation method according to claim 2 , wherein the display apparatus comprises a plurality of pixel units, and determining a first full screen temperature according to brightness signals of the display apparatus comprises:

determining brightness signals of respective pixel units according to display data signals of the respective pixel units; and

determining the first full screen temperature according to a sum of brightness signals of the respective pixel units of a multi-frame display picture.

4. The temperature compensation method according to claim 2 , wherein determining a first full screen temperature according to driving current signals of respective driving transistors comprises:

determining the first full screen temperature according to a sum of driving current signals of the respective driving transistors of a multi-frame display picture.

5. The temperature compensation method according to claim 2 , wherein determining the temperature value of the driving transistor according to the first full screen temperature and/or the internal sensed temperature comprises:

acquiring an external sensed temperature measured by a temperature sensor disposed outside the display apparatus;

correcting the first full screen temperature according to the external sensed temperature to obtain a second full screen temperature; and

determining the temperature value of the driving transistor according to the second full screen temperature and/or the internal sensed temperature.

6. A temperature compensation device for a display apparatus, comprising:

a processor; and

a memory coupled to the processor, and having instructions executable by the processor, wherein the instructions, when executed by the processor, cause the processor to be configured to:

determine, according to a photoelectric display signal of the display apparatus and/or an anode voltage signal of a light emitting device in the display apparatus, a temperature value of a driving transistor corresponding to the light emitting device in the display apparatus;

determine, according to the temperature value of the driving transistor, a preset correspondence relationship between temperatures and electrical parameters of the driving transistor, and a reference electrical parameter, an electrical parameter offset of the driving transistor; and

determine, according to the electrical parameter offset, a temperature compensation value for a data line signal corresponding to the driving transistor in the display apparatus,

wherein the electrical parameter of the driving transistor comprises a mobility and a threshold voltage, the reference electrical parameter comprises a reference mobility and a reference threshold voltage, and the processor is further configured to:

determine a real-time mobility corresponding to the temperature value of the driving transistor according to a preset correspondence relationship between temperatures and mobilities;

determine a real-time threshold voltage corresponding to the temperature value of the driving transistor according to a preset correspondence relationship between temperatures and threshold voltages;

determine a mobility offset according to the reference mobility and the real-time mobility; and

determine a threshold voltage offset according to the reference threshold voltage and the real-time threshold voltage,

wherein the electrical parameter offset comprises the mobility offset and the threshold voltage offset.

7. The temperature compensation device according to claim 6 , wherein the processor is further configured to:

determine a first full screen temperature according to a brightness signal of the display apparatus or driving current signals of respective driving transistors in the display apparatus;

determine an internal sensed temperature of the driving transistor according to the anode voltage signal of the light emitting device; and

determine the temperature value of the driving transistor according to the first full screen temperature and/or the internal sensed temperature.

8. The temperature compensation device according to claim 7 , wherein the display apparatus comprises a plurality of pixel units, and the processor is further configured to:

determine brightness signals of respective pixel units according to display data signals of the respective pixel units; and

determine the first full screen temperature according to a sum of brightness signals of the respective pixel units of a multi-frame display picture.

9. The temperature compensation device according to claim 7 , wherein the processor is further configured to:

determine the first full screen temperature according to a sum of driving current signals of the respective driving transistors of a multi-frame display picture.

10. The temperature compensation device according to claim 9 , wherein the processor is further configured to:

determine the first full screen temperature according to a sum of driving current signals of the respective driving transistors of the multi-frame display picture.

11. The temperature compensation device according to claim 7 , wherein the processor is further configured to:

acquire an external sensed temperature measured by a temperature sensor disposed outside the display apparatus;

correct the first full screen temperature according to the external sensed temperature to obtain a second full screen temperature; and

determine the temperature value of the driving transistor according to the second full screen temperature and/or the internal sensed temperature.

12. A display apparatus, comprising the temperature compensation device according to claim 6 .