Display device

Abstract

The embodiment of the invention provides a display device. The display device includes a display panel and an external circuit. The display panel comprises a plurality of pixel driving circuits and a plurality of sensing lines. The pixel driving circuit includes a driving transistor. One sensing line is connected to one of the sources and drains of the plurality of driving transistors, respectively. The external circuit is connected with the plurality of sensing lines. The external circuit is configured to obtain an original sensing signal output by the driving transistor through the sensing line when the driving transistor is conducted; and under the condition that one sensing line is the abnormal sensing line, determining the actual sensing voltage based on the original sensing signal and the sensing correction voltage corresponding to one sensing line. Therefore, the original sensing signal acquired by the abnormal sensing line is corrected by adopting the sensing correction voltage, so that the problem of abnormal display caused by compensation of abnormal data sensed by the abnormal sensing line is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device. Background Art

[0002] Compared with traditional liquid crystal display devices, new displays such as organic light emitting diode (OLED) display devices have advantages such as higher contrast, lower power consumption and flexibility. Generally speaking, active drive circuits are usually used to drive new displays to display images to reduce power consumption. However, when active drive circuits are used, new displays may display abnormalities during the display process.

[0003] Therefore, it is necessary to propose a technical solution to improve the display abnormality problem of the display when an active driving circuit is used. Summary of the invention

[0004] The embodiments of the present application provide a display device to improve the problem that abnormal data sensed by an abnormal sensing line causes abnormal display.

[0005] In order to achieve the above-mentioned object, an embodiment of the present application provides a display device, including:

[0006] The display panel comprises a plurality of pixel driving circuits and a plurality of sensing lines, wherein the pixel driving circuits comprise driving transistors, and the plurality of sensing lines are respectively connected to one of the source and the drain of the plurality of driving transistors;

[0007] The external circuit is connected to the plurality of sensing lines and is configured as follows:

[0008] Acquiring, through the sensing line, an original sensing signal output by the driving transistor when the driving transistor is turned on;

[0009] In the case that one of the sensing lines is an abnormal sensing line, an actual sensing voltage is determined based on the original sensing signal and a sensing correction voltage corresponding to one of the sensing lines.

[0010] Optionally, the external circuit is further configured as:

[0011] inputting a sampling voltage to one of a source and a drain of the driving transistor through each of the plurality of sensing lines;

[0012] A plurality of actual detection voltages corresponding to each of the sampling voltages are obtained through one of the sensing lines; wherein the sensing correction voltage corresponding to one of the sensing lines is determined based on the plurality of actual detection voltages obtained by the sensing line and a target detection voltage, and the target detection voltage is determined based on the plurality of actual detection voltages obtained by at least two of the sensing lines.

[0013] Optionally, the sensing correction voltage corresponding to one of the sensing lines is equal to an average value of a plurality of difference values, and the plurality of difference values ​​are differences between a plurality of the actual detection voltages and the target detection voltage, respectively.

[0014] Optionally, the sampling voltage includes a first sampling voltage and a second sampling voltage that are different from each other, the multiple actual detection voltages include multiple first actual detection voltages and multiple second actual detection voltages, the multiple first actual detection voltages are obtained by applying the first sampling voltage to one of the source and the drain of the multiple driving transistors through the multiple sensing lines, and the multiple second actual detection voltages are obtained by applying the second sampling voltage to one of the source and the drain of the multiple driving transistors through the multiple sensing lines; the target detection voltage includes a first target detection voltage and a second target detection voltage;

[0015] The plurality of differences include a plurality of first differences and a plurality of second differences, wherein the plurality of first differences are differences between the plurality of first actual detection voltages and the first target detection voltage, and the plurality of second differences are differences between the plurality of second actual detection voltages and the second target detection voltage.

[0016] Optionally, the differences between the plurality of actual detection voltages acquired by one of the sensing lines and the target detection voltage are m differences;

[0017] When the number of abnormal difference values ​​among the m difference values ​​is greater than or equal to n, the sensing line is the abnormal sensing line;

[0018] When the number of abnormal difference values ​​among the m difference values ​​is less than or equal to n, the sensing line is not the abnormal sensing line;

[0019] Here, m is greater than or equal to 2, and n is greater than or equal to 1 and less than or equal to m.

[0020] Optionally, the external circuit is further configured as:

[0021] determining electrical characteristic compensation data of the driving transistor based on the actual sensing voltage;

[0022] The compensated data voltage is output to the pixel driving circuit connected to the sensing line based on the electrical characteristic compensation data and the original data voltage.

[0023] Optionally, the actual sensing voltage is equal to the sum of the voltage corresponding to the original sensing signal and the sensing correction voltage.

[0024] Optionally, the target detection voltage is equal to an average value of at least two actual detection voltages satisfying a preset condition among a plurality of actual detection voltages acquired by at least two of the sensing lines.

[0025] Optionally, the pixel driving circuit includes a driving transistor and a switching transistor, and the display panel also includes a light emitting device;

[0026] The source and drain of the driving transistor are connected between the first power supply voltage terminal and the second power supply voltage terminal, and the gate of the driving transistor is connected to one of the source and drain of the switching transistor;

[0027] The other of the source and the drain of the switch transistor is connected to the data line, and the gate of the switch transistor is connected to the first control line;

[0028] The light emitting device is connected between one of the source and the drain of the driving transistor and the second power supply voltage terminal.

[0029] Optionally, the pixel driving circuit further includes a sensing transistor, a source and a drain of the sensing transistor are connected between the sensing line and one of the source and the drain of the driving transistor, and a gate of the sensing transistor is connected to a second control line.

[0030] In the display device of some embodiments of the present application, a sensing correction voltage is used to correct the original sensing signal obtained by the abnormal sensing line to improve the problem of display abnormality caused by compensating the abnormal data sensed by the abnormal sensing line. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a planar structure of a display device provided in some embodiments of the present application;

[0032] Figure 2 A circuit diagram of a pixel driving circuit provided for some embodiments of the present application.

[0033] The reference numerals are as follows:

[0034] 100. Display device;

[0035] 10. Display panel;

[0036] 20, pixel driving circuit; 20A, pixel driving circuit column 20A; T1, driving transistor; T2, switching transistor; T3, sensing transistor; 201, light emitting device; Cst, storage capacitor;

[0037] ELVDD, a first power supply voltage terminal; ELVSS, a second power supply voltage terminal;

[0038] DL, data line; SL, sensing line; WR1, first control line; WR2, second control line;

[0039] Vg, first node; Vs, second node;

[0040] K1, first switch; K2, second switch;

[0041] 30. External circuit;

[0042] 301, timing controller; 302, source driver; 303, gate driver. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0044] See also Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of a planar structure of a display device provided in some embodiments of the present application, Figure 2 A circuit diagram of a pixel driving circuit provided for some embodiments of the present application.

[0045] like Figure 1 As shown, the display device 100 includes a display panel 10 and an external circuit 30. The external circuit 30 is connected to the display panel 10 to drive the display panel 10 to emit light.

[0046] In some embodiments, the display panel 10 may include any one of an organic light emitting diode display panel, a micro light emitting diode display panel, a sub-millimeter light emitting diode display panel, and a quantum dot display panel.

[0047] like Figure 1 and Figure 2 As shown, the display panel 10 includes a plurality of pixel driving circuits 20, a plurality of light emitting devices 201, a plurality of data lines DL, and a plurality of first control lines WR1.

[0048] In some embodiments, a plurality of pixel driving circuits 20 are arranged in an array, for example, a plurality of pixel driving circuits 20 constitute a plurality of pixel driving circuit columns 20A, and a pixel driving circuit column 20A includes at least two pixel driving circuits 20 arranged along a row direction. The pixel driving circuit 20 includes a driving transistor T1 and a switching transistor T2.

[0049] The source and drain of the driving transistor T1 are connected between the first power supply voltage terminal ELVDD and the second power supply voltage terminal ELVSS. The gate of the driving transistor T1 is connected to one of the source and drain of the switching transistor T2. When the driving transistor T1 is turned on, it can output a driving current to the light emitting device 201 to drive the light emitting device 201 to emit light.

[0050] In some embodiments, a first power voltage input to the first power voltage terminal ELVDD is greater than a second power voltage input to the second power voltage terminal ELVSS.

[0051] The other of the source and the drain of the switch transistor T2 is connected to the data line DL. The gate of the switch transistor T2 is connected to the first control line WR1. When the switch transistor T2 is turned on, the signal transmitted by the data line DL is output to the gate of the driving transistor T1 through the turned-on switch transistor T2.

[0052] The light emitting device 201 is connected between one of the source and the drain of the driving transistor T1 and the second power voltage terminal ELVSS.

[0053] The pixel driving circuit 20 further includes a storage capacitor Cst. The storage capacitor Cst includes a first electrode and a second electrode. The first electrode is connected to the gate of the driving transistor T1. The second electrode is connected to one of the source and the drain of the driving transistor T1.

[0054] Among them, the gate of the driving transistor T1, one of the source and drain of the switching transistor T2, and the first electrode of the storage capacitor Cst are all connected to the first node Vg. The potential of the first node Vg can control whether the driving transistor T1 is turned on. One of the source and drain of the driving transistor T1 and the second electrode of the storage capacitor Cst are all connected to the second node Vs. The signal of the second node Vs is detected, and the actual electrical characteristics (such as threshold voltage and electron mobility, etc.) of the driving transistor T1 are calculated based on the detected signal, and then the electrical non-uniformity of the driving transistor T1 caused by the electrical offset is compensated based on the actual electrical characteristics, so as to improve the display abnormality caused by the electrical non-uniformity of multiple driving transistors T1.

[0055] The display panel 10 further includes a plurality of sensing lines SL arranged at intervals. Each sensing line SL is connected to one of the source and drain of the plurality of driving transistors T1 so as to detect a signal of one of the source and drain of the driving transistor T1. For example, each sensing line SL is connected to at least two pixel driving circuits 20 in a pixel driving circuit column 20A.

[0056] In some embodiments, Figure 1 As shown, the extending direction of the sensing line SL is parallel to the extending direction of the data line DL.

[0057] In some embodiments, the display panel 10 further includes a second control line WR2. The pixel driving circuit 20 further includes a sensing transistor T3. The source and drain of the sensing transistor T3 are connected between the sensing line SL and one of the source and drain of the driving transistor T1. The gate of the sensing transistor T3 is connected to the second control line WR2. In this way, the sensing transistor T3 can control the conduction and disconnection of the sensing line SL and the second node Vs.

[0058] In some embodiments, each of the driving transistor T1 , the switching transistor T2 , and the sensing transistor T3 may include an n-type transistor or a p-type transistor. Exemplarily, the driving transistor T1 , the switching transistor T2 , and the sensing transistor T3 are all n-type transistors.

[0059] In some embodiments, each of the driving transistor T1 , the switching transistor T2 , and the sensing transistor T3 may include at least one of a polysilicon transistor, a metal oxide transistor, and an amorphous silicon transistor.

[0060] The external circuit 30 is connected to a plurality of sensing lines SL, and is configured to: obtain the original sensing signal output by the driving transistor T1 when the driving transistor T1 is turned on through the sensing line SL; and, when one sensing line SL is an abnormal sensing line, determine the actual sensing voltage based on the original sensing signal and the sensing correction voltage corresponding to the one sensing line SL. In this way, the original sensing signal obtained by the abnormal sensing line is corrected by the sensing correction voltage to improve the problem that the display panel displays abnormally due to compensation of abnormal data sensed by the abnormal sensing line.

[0061] It should be noted that, in the case of an abnormality in the sensing line SL, for example, when there is a short circuit between the sensing line SL and other signal lines, and / or when the sensing line SL is open, the original sensing signal obtained through the sensing line SL may also be abnormal. The difference between the electrical characteristic data of the driving transistor T1 calculated using the abnormal original sensing signal and the electrical characteristic data of the normal driving transistor T1 is large, and this difference is superimposed on the display data used for display for display compensation, which will cause display abnormality after compensation. Therefore, in the case where the sensing line SL is an abnormal sensing line, the embodiment of the present application corrects the original sensing signal obtained by the sensing line SL to improve the problem of display abnormality caused by external compensation of abnormal data sensed by the abnormal sensing line.

[0062] In some embodiments, when there is a short circuit between the sensing line SL and other signal lines, there may be a short circuit problem between the sensing line SL and at least one of the data line DL, the first power supply voltage terminal ELVDD, the second power supply voltage terminal ELVSS, the first control line WR1 and the second control line WR2.

[0063] In some embodiments, the external circuit 30 is further configured to: input a sampling voltage to one of the source and the drain of the driving transistor T1 through each of the plurality of sensing lines SL; and obtain a plurality of actual detection voltages corresponding to each sampling voltage through one sensing line SL. The sensing correction voltage corresponding to one sensing line SL is determined based on the plurality of actual detection voltages obtained by the sensing line SL and the target detection voltage. The target detection voltage is determined based on the plurality of actual detection voltages obtained by at least two sensing lines SL.

[0064] In some embodiments of the present application, after applying the same sampling voltage to the plurality of sensing lines SL, the second node Vs is sampled multiple times through each sensing line SL to obtain multiple actual detection voltages of each sampling voltage. Furthermore, based on the difference between the multiple actual detection voltages obtained by each sensing line SL and the target detection voltage determined by the multiple actual detection voltages obtained by at least two sensing lines SL, the sensing correction voltage of one sensing line SL is determined.

[0065] It should be noted that if the sensing line SL is an abnormal sensing line, the actual detection voltage of the second node Vs will change significantly relative to the sampling voltage. If the sensing line SL is not an abnormal sensing line, the actual detection voltage of the second node Vs will not change or change slightly relative to the sampling voltage. The embodiment of the present application uses multiple actual detection voltages obtained by one sensing line SL to improve the accuracy of the actual detection voltage. The target detection voltage is determined using multiple actual detection voltages obtained by at least two sensing lines SL to improve the accuracy of the actual detection voltage. Therefore, the accuracy of the sensing correction voltage determined based on multiple actual detection voltages obtained by one sensing line SL and the target detection voltage is also improved.

[0066] In some embodiments, the sensing correction voltage corresponding to a sensing line SL is equal to the average value of a plurality of differences. The plurality of differences are the differences between the data corresponding to the plurality of actual detection voltages and the target detection voltage. In this way, the sensing correction voltage is calculated using the average value of the plurality of differences, thereby improving the accuracy of the sensing correction voltage corresponding to a sensing line SL.

[0067] In some embodiments, the sampling voltage includes a first sampling voltage and a second sampling voltage that are different from each other. The multiple actual detection voltages include multiple first actual detection voltages and multiple second actual detection voltages. The multiple first actual detection voltages are obtained by applying the first sampling voltage to one of the source and drain of the multiple driving transistors T1 through the multiple sensing lines SL. The multiple second actual detection voltages are obtained by applying the second sampling voltage to one of the source and drain of the multiple driving transistors T1 through the multiple sensing lines SL. The target detection voltage includes a first target detection voltage and a second target detection voltage.

[0068] Among them, the multiple differences include multiple first differences and multiple second differences. The multiple first differences are respectively the differences between the data corresponding to the multiple first actual detection voltages and the first target detection voltage, and the multiple second differences are respectively the differences between the data corresponding to the multiple second actual detection voltages and the second target detection voltage.

[0069] In some embodiments of the present application, first, based on different first sampling voltages and second sampling voltages, a plurality of first actual detection voltages and a plurality of second actual detection voltages are detected respectively. Then, a plurality of first differences are determined based on the plurality of first actual detection voltages and the first target detection voltage, and a plurality of second differences are determined based on the plurality of second actual detection voltages and the second target detection voltage. Finally, a sensing correction voltage corresponding to a sensing line SL is determined based on the plurality of first differences and the plurality of second differences to further improve the accuracy of the sensing correction voltage.

[0070] It should be noted that the process in which the sampling voltage includes the first sampling voltage and the second sampling voltage may be that after applying the first sampling voltage to the sensing line SL, a plurality of first actual detection voltages corresponding to the first sampling voltage are detected through the plurality of sensing lines SL. Then, a second sampling voltage is applied to the sensing line SL, and a plurality of second actual detection voltages corresponding to the second sampling voltage are detected through the plurality of sensing lines SL.

[0071] In some embodiments, the sampling voltage may be one of the first sampling voltage and the second sampling voltage. At this time, the sensing correction voltage corresponding to one sensing line SL is equal to the average value of the first differences or the average value of the second differences.

[0072] It is understandable that there may be more than two sampling voltages.

[0073] In some embodiments, the difference between the multiple actual detection voltages obtained by a sensing line SL and the target detection voltage is m difference values. Among the m difference values, when the number of abnormal difference values ​​is greater than or equal to n, the sensing line SL is an abnormal sensing line. Among the m difference values, when the number of abnormal difference values ​​is less than or equal to n, the sensing line SL is not an abnormal sensing line. m is greater than or equal to 2, and n is greater than or equal to 1 and less than or equal to m. In this way, based on the number of abnormal difference values ​​among the m difference values, it is determined whether the sensing line SL is an abnormal sensing line.

[0074] In an exemplary embodiment, when n is equal to m, that is, when the m differences are all abnormal differences, the sensing line SL is an abnormal sensing line.

[0075] In some embodiments, when the difference is greater than a first difference threshold or less than a second difference threshold, the difference is an abnormal difference, wherein the first difference threshold is greater than the second difference threshold.

[0076] In some embodiments, the actual sensing voltage is equal to the sum of the voltage corresponding to the original sensing signal and the sensing correction voltage, so as to achieve correction of the original sensing signal.

[0077] It should be noted that when the original sensing signal is a current, the original sensing signal needs to be converted into a corresponding voltage.

[0078] In some embodiments, the target detection voltage is equal to the average value of at least two actual detection voltages satisfying a preset condition among a plurality of actual detection voltages acquired by at least two sensing lines SL. In this way, effective actual detection voltages are screened out from a plurality of actual detection voltages based on the preset condition, and then the target detection voltage is calculated based on the effective actual detection voltage, thereby improving the accuracy of the target detection voltage.

[0079] In some embodiments, the at least two actual detection voltages satisfying the preset condition may be actual detection voltages remaining after removing extreme values ​​from the plurality of actual detection voltages.

[0080] In some embodiments, Figure 1 As shown, the external circuit 30 also includes one or more source drivers 302. Each source driver 302 may include an analog-to-digital converter ADC (not shown in the figure). The analog-to-digital converter ADC of each source driver 302 may be connected to at least two sensing lines SL to obtain the original sensing signal output by the driving transistor when the driving transistor is turned on through the sensing lines. The analog-to-digital converter ADC of each source driver 302 is also configured to obtain multiple actual detection voltages corresponding to each of the sampled voltages through one of the sensing lines.

[0081] In some embodiments, the analog-to-digital converter ADC may also be located outside the source driver 302 .

[0082] In some embodiments, among a plurality of actual detection voltages obtained by a plurality of sensing lines SL connected to a source driver 302 , an average value of actual detection voltages satisfying a preset condition is equal to the target detection voltage, so as to further improve the accuracy of the target detection voltage.

[0083] In some embodiments, among the multiple actual detection voltages obtained by the multiple sensing lines SL connected to the multiple source drivers 302, the average value of the actual detection voltages that meet the preset conditions is equal to the target detection voltage, so as to improve the influence of the sampling difference of the analog-to-digital converter ADC of different source drivers on the target detection voltage, and further improve the accuracy of the target detection voltage.

[0084] In some embodiments, the external circuit 30 is further configured to: determine the electrical characteristic compensation data of the driving transistor T1 based on the actual sensing voltage; and output the compensation data voltage to the pixel driving circuit 20 connected to the sensing line SL based on the electrical characteristic compensation data and the original data voltage. In this way, the electrical characteristic compensation data of the driving transistor T1 is calculated using the corrected actual sensing voltage, so that the electrical characteristic compensation data is more accurate. The compensation data voltage output based on the electrical characteristic compensation data and the original data voltage is also more accurate, improving the display abnormality of the display panel 10.

[0085] In some embodiments, the external circuit 30 further includes a timing controller 301. The timing controller 301 is connected to the source driver 302 and the display panel 10. The timing controller 301 is configured to input a sampling voltage to one of the source and the drain of the driving transistor through each of the plurality of sensing lines. The timing controller 301 may also be configured to determine an actual sensing voltage based on the original sensing signal and a sensing correction voltage corresponding to one of the sensing lines. The timing controller 301 may also be configured to determine electrical characteristic compensation data of the driving transistor T1 based on the actual sensing voltage.

[0086] In some embodiments, Figure 2 As shown, the display panel 10 further includes a first switch K1, which is connected between the sensing line SL and the timing controller 301. When a sampling voltage needs to be input to one of the source and the drain of the driving transistor T1, the first switch K1 is closed, and the timing controller 301 inputs a sampling voltage to one of the source and the drain of the driving transistor T1 through the sensing line SL. When the voltage of the second node Vs needs to be detected, the first switch K1 is disconnected.

[0087] In some embodiments, Figure 2 As shown, the display panel 10 further includes a second switch K2. The second switch K2 is connected between the sensing line SL and the analog-to-digital converter ADC. When a sampling voltage needs to be input to one of the source and the drain of the driving transistor T1, the second switch K2 is disconnected. When the voltage of the second node Vs needs to be detected, the second switch K2 is closed.

[0088] In some embodiments, Figure 1 As shown, the external circuit 30 further includes a gate driver 303 . The gate driver 303 is connected to the first control line WR1 and the second control line WR2 . The gate driver 303 is also connected to the timing controller 301 .

[0089] When the display panel 10 displays an image, the operation process of the pixel driving circuit 20 includes an initialization phase, a sensing phase, a data writing phase and a light emitting phase.

[0090] In the initialization stage, the first control line WR1 transmits a high-level first control signal, and the second control line WR2 transmits a high-level second control signal. The data line DL transmits a first reference voltage. The first switch K1 is closed, and the timing controller 301 applies a second reference voltage Vpre to the sensing line SL. The second switch K2 is disconnected. Therefore, the switching transistor T2 and the sensing transistor T3 are both turned on, the first reference voltage is written to the first node Vg, and the second reference voltage Vpre is written to the second node Vs. Among them, the first reference voltage is different from the second reference voltage Vpre.

[0091] In the sensing phase, the driving transistor T1 is turned on under the voltage difference between the first reference voltage and the second reference voltage Vpre, and one of the source and the drain of the driving transistor T1 outputs the sensing current. At the same time, since the first switch K1 is disconnected and the second switch K2 is closed, the analog-to-digital converter ADC obtains the sensing current through the sensing line SL, and the sensing current is then output to the timing controller 301.

[0092] In the case where a sensing line SL is an abnormal sensing line, the timing controller 301 obtains an actual sensing voltage based on the voltage corresponding to the sensing current and the sensing correction voltage corresponding to the sensing line SL. The timing controller 301 then calculates the actual electrical characteristic data (such as the actual threshold voltage or the actual electron mobility) of the driving transistor T1 based on the actual sensing voltage. The timing controller 301 also determines an electrical characteristic offset value based on the actual electrical characteristic data of the driving transistor T1 and the normal electrical characteristic data of the driving transistor T1, determines a compensation value for the original data voltage based on the electrical characteristic offset value, and determines a compensated data voltage based on the sum of the original data voltage and the compensation value.

[0093] In the data writing phase, the timing controller 301 outputs the compensation data voltage to the source driver 302, and the source driver 302 outputs the compensation data voltage to the corresponding data line DL. Since the first control line WR1 transmits a high-level first control signal and the second control line WR2 transmits a low-level second control signal, the switch transistor T2 is turned on, the sensing transistor T3 is turned off, and the compensation data voltage is output to the first node Vg.

[0094] In the light emitting stage, the driving transistor T1 is turned on and outputs a driving current under the action of the compensation data voltage, and the driving current flows through the light emitting device 201, and the light emitting device 201 emits light.

[0095] It should be noted that, when a sensing line SL is not an abnormal sensing line, it is not necessary to correct the sensing current obtained by the sensing line SL during the sensing stage, and the actual electrical characteristic data of the driving transistor T1 can be calculated using the original sensing signal.

[0096] The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technical personnel in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display device, characterized in that: include: The display panel comprises a plurality of pixel driving circuits and a plurality of sensing lines, wherein the pixel driving circuits comprise driving transistors, and one of the sensing lines is respectively connected to one of the source and the drain of the plurality of driving transistors; The external circuit is connected to the plurality of sensing lines and is configured as follows: Acquiring, through the sensing line, an original sensing signal output by the driving transistor when the driving transistor is turned on; In the case that one of the sensing lines is an abnormal sensing line, an actual sensing voltage is determined based on the original sensing signal and a sensing correction voltage corresponding to one of the sensing lines.

2. The display device according to claim 1, characterized in that The external circuit is further configured as: inputting a sampling voltage to one of a source and a drain of the driving transistor through each of the plurality of sensing lines; A plurality of actual detection voltages corresponding to each of the sampling voltages are obtained through one of the sensing lines; wherein the sensing correction voltage corresponding to one of the sensing lines is determined based on the plurality of actual detection voltages obtained by the sensing line and a target detection voltage, and the target detection voltage is determined based on the plurality of actual detection voltages obtained by at least two of the sensing lines.

3. The display device according to claim 2, characterized in that: The sensing correction voltage corresponding to one of the sensing lines is equal to an average value of a plurality of difference values, and the plurality of difference values ​​are differences between a plurality of the actual detection voltages and the target detection voltage, respectively.

4. The display device according to claim 3, characterized in that The sampling voltage includes a first sampling voltage and a second sampling voltage that are different from each other, the multiple actual detection voltages include a plurality of first actual detection voltages and a plurality of second actual detection voltages, the plurality of first actual detection voltages are obtained by applying the first sampling voltage to one of the source and the drain of the plurality of driving transistors through the plurality of sensing lines, and the plurality of second actual detection voltages are obtained by applying the second sampling voltage to one of the source and the drain of the plurality of driving transistors through the plurality of sensing lines; the target detection voltage includes a first target detection voltage and a second target detection voltage; The plurality of differences include a plurality of first differences and a plurality of second differences, wherein the plurality of first differences are differences between the plurality of first actual detection voltages and the first target detection voltage, and the plurality of second differences are differences between the plurality of second actual detection voltages and the second target detection voltage.

5. The display device according to claim 2, characterized in that: The difference between the plurality of actual detection voltages obtained by one of the sensing lines and the target detection voltage is m difference values; When the number of abnormal difference values ​​among the m difference values ​​is greater than or equal to n, the sensing line is the abnormal sensing line; When the number of abnormal difference values ​​among the m difference values ​​is less than or equal to n, the sensing line is not the abnormal sensing line; Here, m is greater than or equal to 2, and n is greater than or equal to 1 and less than or equal to m.

6. The display device according to claim 1, characterized in that: The external circuit is further configured as: determining electrical characteristic compensation data of the driving transistor based on the actual sensing voltage; The compensated data voltage is output to the pixel driving circuit connected to the sensing line based on the electrical characteristic compensation data and the original data voltage.

7. The display device according to claim 1, characterized in that: The actual sensing voltage is equal to the sum of the voltage corresponding to the original sensing signal and the sensing correction voltage.

8. The display device according to any one of claims 1 to 4, characterized in that: The target detection voltage is equal to an average value of at least two of the actual detection voltages satisfying a preset condition among a plurality of actual detection voltages acquired by at least two of the sensing lines.

9. The display device according to claim 1, characterized in that: The pixel driving circuit includes a driving transistor and a switching transistor, and the display panel also includes a light emitting device; The source and drain of the driving transistor are connected between the first power supply voltage terminal and the second power supply voltage terminal, and the gate of the driving transistor is connected to one of the source and drain of the switching transistor; The other of the source and the drain of the switch transistor is connected to the data line, and the gate of the switch transistor is connected to the first control line; The light emitting device is connected between one of the source and the drain of the driving transistor and the second power supply voltage terminal.

10. The display device according to claim 9, characterized in that: The pixel driving circuit further includes a sensing transistor, a source and a drain of the sensing transistor are connected between the sensing line and one of the source and the drain of the driving transistor, and a gate of the sensing transistor is connected to a second control line.

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