Method and apparatus for detecting threshold voltage of driving transistor, and display apparatus

An apparatus for detecting a threshold voltage of a driving transistor, the apparatus comprising:

• at least one source voltage obtaining circuit, wherein each source voltage obtaining circuit is configured to be electrically connected to a driving transistor of at least one driving transistor, and detect a source voltage of a corresponding driving transistor;
• a processor electrically connected to each source voltage obtaining circuit, wherein the processor is configured to:
• obtain at least one first threshold voltage of the at least one driving transistor according to at least one source voltage detected by the at least one source voltage obtaining circuit respectively, each first threshold voltage being a threshold voltage of a corresponding driving transistor obtained when the corresponding driving transistor is driven by a corresponding first driving signal;
• obtain a threshold reference voltage of the driving transistor according to the at least one first threshold voltage;
• obtain a second driving signal of the driving transistor according to the threshold reference voltage and a first driving signal of the driving transistor, a value of the second driving signal being greater than a value of the first driving signal corresponding to a same driving transistor;
• and
• obtain a second threshold voltage of the driving transistor according to a source voltage detected by a source voltage obtaining circuit and the second driving signal, the second threshold voltage being a threshold voltage of the driving transistor obtained when the driving transistor is driven by the second driving signal,
• wherein the processor is further configured to:
• obtain first threshold voltages of the plurality of driving transistors in the display apparatus;
• compare a characteristic value of the plurality of first threshold voltages with the value of the first driving signal or half of the value of the first driving signal;
• and
• determine the threshold reference voltage of the driving transistor according to a comparison result.

A method for detecting a threshold voltage of a driving transistor, the method comprising:

• obtaining at least one first threshold voltage of at least one driving transistor, each first threshold voltage being a threshold voltage of a corresponding driving transistor obtained when the corresponding driving transistor is driven by a corresponding first driving signal;
• obtaining a threshold reference voltage of the driving transistor according to the at least one first threshold voltage;
• obtaining a second driving signal of the driving transistor according to the threshold reference voltage and a first driving signal of the driving transistor, a value of the second driving signal being greater than a value of the first driving signal;
• and
• obtaining a second threshold voltage of the driving transistor, the second threshold voltage being a threshold voltage of the driving transistor obtained when the driving transistor is driven by the second driving signal;
• wherein obtaining at least one first threshold voltage of at least one driving transistor includes:
• obtaining a first threshold voltage of the driving transistor;
• wherein obtaining the threshold reference voltage of the driving transistor according to the at least one first threshold voltage, includes:
• comparing the first threshold voltage with the value of the first driving signal;
• and
• determining the threshold reference voltage of the driving transistor according to a comparison result:
• setting a product of N and the value of the first driving signal as the threshold reference voltage of the driving transistor in response to a determination of the first threshold voltage being equal to the value of the first driving signal, wherein N is greater than 0 and less than or equal to 1.