Display device, control method and apparatus, storage medium

Abstract

This disclosure provides a display device, control method and apparatus, and storage medium. The display device includes: a timing control module configured to correct initial pixel data of a target pixel unit to obtain target pixel data, and output the target pixel data to a data signal driving module; the target pixel data is used to increase the forward bias voltage of the driving transistor in the pixel driving circuit of the target pixel unit under normal operating conditions; the data signal driving module is configured to output a driving voltage matching the target pixel data to the target pixel unit, so that the driving transistor maintains a forward bias voltage under normal operating conditions. This embodiment, by correcting the pixel data, enables the target pixel data to increase the forward bias voltage of the driving transistor of the target pixel unit, thereby mitigating or eliminating surface and / or line ghosting caused by threshold voltage negative drift of the driving transistor, which is beneficial for improving display quality.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular to a display device, a control method and apparatus, and a storage medium. BACKGROUND

[0002] An OLED (Organic Light-Emitting Diode) device belongs to a current type organic light-emitting device, which is a phenomenon of light emission by injection and recombination of carriers. The light emission intensity is proportional to the injected current. Under the action of an electric field, holes generated by an anode and electrons generated by a cathode will move and be injected into a hole transport layer and an electron transport layer, respectively, and migrate to a light-emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, thereby exciting light-emitting molecules to finally produce visible light.

[0003] An OLED display screen has the advantages of low power consumption, fast response speed, and resolution, and is thus increasingly widely used in electronic devices. SUMMARY

[0004] The present disclosure provides a display device, a control method and apparatus, and a storage medium to solve the above technical problems.

[0005] According to a first aspect of the present disclosure, a display device is provided, comprising a timing control module, a pixel array, and a data signal driving module; each pixel unit of the pixel array comprises a light-emitting device and a pixel driving circuit for driving the light-emitting device to emit light; the pixel driving circuit comprises a driving transistor; the timing control module is electrically connected to the data signal driving module, and the data signal driving module is electrically connected to each pixel unit.

[0006] The timing control module is configured to correct initial pixel data of a target pixel unit to obtain target pixel data, and output the target pixel data to the data signal driving module; the target pixel data is used to increase the forward bias voltage of the driving transistor in the pixel driving circuit of the target pixel unit in a normal working scenario;

[0007] The data signal driving module is configured to output a driving voltage matched with the target pixel data to the target pixel unit, so that the driving transistor maintains the forward bias voltage in the normal working scenario.

[0008] Optionally, the timing control module corrects the initial pixel data of the target pixel unit to obtain the target pixel data, comprising:

[0009] In the display control phase, it is determined whether the initial pixel data of the target pixel unit is a first preset gray scale; the first preset gray scale refers to a gray scale voltage value that causes the light-emitting device not to emit light;

[0010] When the determination is the first preset gray scale, preset threshold voltage compensation is performed on the initial pixel data to obtain intermediate pixel data;

[0011] First preset correction voltage compensation is performed on the intermediate pixel data to obtain the target pixel data;

[0012] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and the light emitting device of the target pixel unit not emitting light.

[0013] Optionally, the first preset correction voltage compensation performed by the timing control module on the intermediate pixel data to obtain the target pixel data comprises:

[0014] A first preset correction voltage corresponding to the target pixel unit is obtained;

[0015] A difference between the intermediate pixel data and the first preset correction voltage is obtained as the target pixel data.

[0016] Optionally, the timing control module obtains the first preset correction voltage corresponding to the target pixel unit, comprising:

[0017] The correction voltage is set as an initial value and the correction voltage is increased by a preset step length;

[0018] A difference between the preset threshold voltage and the correction voltage is obtained as a test pixel voltage;

[0019] The test pixel voltage is sequentially output to the target pixel unit to obtain a first test pixel voltage that stops the target pixel from emitting light;

[0020] The correction voltage corresponding to the first test pixel voltage is taken as the first preset correction voltage.

[0021] Optionally, the timing control module performs correction on the initial pixel data of the target pixel unit to obtain the target pixel data, comprising:

[0022] In a display control stage, a target pixel unit and initial pixel data thereof are obtained;

[0023] Preset threshold voltage compensation is performed on the initial pixel data of the target pixel unit to obtain intermediate pixel data;

[0024] Second preset correction voltage compensation is performed on the intermediate pixel data to obtain the target pixel data;

[0025] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and the light emitting intensity of the light emitting device of the target pixel unit different from the light emitting intensity of the adjacent light emitting device.

[0026] Optionally, the timing control module obtains the target pixel unit and the initial pixel data of the target pixel unit, and the method comprises:

[0027] For each pixel unit in each row of pixel units of the display device, a difference value of the pixel data of the current pixel unit and the next pixel unit is obtained;

[0028] A comparison result is obtained by comparing the difference value with a preset difference threshold value;

[0029] When the comparison result indicates that the difference value is greater than the preset difference threshold value, the current pixel unit and at least one pixel unit before the current pixel unit are determined as the target pixel unit, and the pixel data of the target pixel unit is obtained as the initial pixel data.

[0030] Optionally, the timing control module performs second preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data, and the method comprises:

[0031] A second preset correction voltage of each target pixel unit is obtained, and the farther the distance between each target pixel unit and the current pixel unit, the greater the second preset correction voltage;

[0032] A difference value of the intermediate pixel data and the second preset correction voltage of each target pixel unit is obtained as the target pixel data.

[0033] Optionally, the timing control module obtains the target pixel unit and the initial pixel data of the target pixel unit, and the method further comprises:

[0034] When the comparison result indicates that the difference value is less than or equal to the preset difference threshold value, the current pixel unit is determined as a non-target pixel unit.

[0035] Optionally, the timing control module obtains the target pixel unit and the initial pixel data of the target pixel unit, and the method comprises:

[0036] For each pixel unit in each row of pixel units of the display device, a difference value of the pixel data of the current pixel unit and the next pixel unit is obtained;

[0037] A comparison result is obtained by comparing the difference value with a preset difference threshold value;

[0038] When the comparison result indicates that the difference value is greater than the preset difference threshold value, the current pixel unit and at least one pixel unit after the current pixel unit are determined as the target pixel unit, and the pixel data of the target pixel unit is obtained as the initial pixel data.

[0039] Optionally, the timing control module performs second preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data, including:

[0040] obtaining a second preset correction voltage of each target pixel unit; the farther the distance between each target pixel unit and the current pixel unit, the smaller the second preset correction voltage;

[0041] obtaining a difference between the intermediate pixel data of each target pixel unit and the second preset correction voltage as the target pixel data.

[0042] Optionally, the timing control module obtains the target pixel unit and the initial pixel data thereof, and further includes:

[0043] when the comparison result indicates that the difference is less than or equal to the preset difference threshold, determining that the current pixel unit is not a target pixel unit.

[0044] Optionally, the pixel driving circuit of the pixel unit includes a correction switch; a first end of the correction switch is electrically connected to a source electrode of a driving transistor of the pixel driving circuit, and a second end of the correction switch is electrically connected to a preset voltage line; the timing control module corrects the initial pixel data of the target pixel unit to obtain the target pixel data, including:

[0045] in the non-display control phase, the correction switch is controlled to be turned on to write a preset voltage of the preset voltage line to the source electrode of the driving transistor; and

[0046] in the first stage of the non-display control phase, the initial pixel data of the target pixel unit is adjusted to a first voltage value as the target pixel data; the first voltage value is greater than a gray scale voltage of the initial pixel data;

[0047] in the second stage of the non-display control phase, the initial pixel data of the target pixel unit is adjusted to a second voltage value as the target pixel data; the second voltage value is equal to the preset voltage output by the preset voltage line;

[0048] in the third stage of the non-display control phase, the initial pixel data of the target pixel unit is adjusted to pixel data of a previous frame image as the target pixel data.

[0049] According to a second aspect of the present disclosure, a control method is provided, which is suitable for a display device, and the method includes:

[0050] The initial pixel data of the target pixel unit is corrected to obtain target pixel data; the target pixel data is used to increase the forward bias voltage of a driving transistor of the target pixel unit in a normal working scenario;

[0051] The target pixel data is output to the target pixel unit.

[0052] Optionally, the initial pixel data of the target pixel unit is corrected to obtain target pixel data, including:

[0053] In the display control stage, it is determined whether the initial pixel data of the target pixel unit is a first preset gray scale;

[0054] When it is determined that the initial pixel data is the first preset gray scale, the initial pixel data is subjected to preset threshold voltage compensation to obtain intermediate pixel data;

[0055] The intermediate pixel data is subjected to first preset correction voltage compensation to obtain the target pixel data;

[0056] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and keep the light-emitting device of the target pixel unit from emitting light.

[0057] Optionally, the intermediate pixel data is subjected to first preset correction voltage compensation to obtain the target pixel data, including:

[0058] A first preset correction voltage corresponding to the target pixel unit is obtained;

[0059] A difference between the intermediate pixel data and the first preset correction voltage is obtained as the target pixel data.

[0060] Optionally, the first preset correction voltage corresponding to the target pixel unit is obtained, including:

[0061] The correction voltage is set as an initial value, and the correction voltage is increased by a preset step length;

[0062] A difference between the preset threshold voltage and the correction voltage is obtained as a test pixel voltage;

[0063] The test pixel voltage is output to the target pixel unit in sequence to obtain a first test pixel voltage that stops the target pixel from emitting light;

[0064] The correction voltage corresponding to the first test pixel voltage is taken as the first preset correction voltage.

[0065] Optionally, the initial pixel data of the target pixel unit is corrected to obtain target pixel data, including:

[0066] In the display control stage, the target pixel unit and initial pixel data thereof are acquired;

[0067] The initial pixel data of the target pixel unit is compensated by a preset threshold voltage to obtain intermediate pixel data;

[0068] The intermediate pixel data is compensated by a second preset correction voltage to obtain the target pixel data;

[0069] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and make the light emitting intensity of the light emitting device of the target pixel unit different from that of the adjacent light emitting device.

[0070] Optionally, the target pixel unit and initial pixel data thereof are acquired, comprising:

[0071] For each pixel unit in each row of pixel units of the display device, a difference value of pixel data of a current pixel unit and a next pixel unit is acquired;

[0072] The difference value is compared with a preset difference threshold to obtain a comparison result;

[0073] When the comparison result indicates that the difference value is greater than the preset difference threshold, the current pixel unit and at least one pixel unit before the current pixel unit are determined as the target pixel unit, and pixel data of the target pixel unit is obtained as the initial pixel data.

[0074] Optionally, the intermediate pixel data is compensated by a second preset correction voltage to obtain the target pixel data, comprising:

[0075] A second preset correction voltage of each target pixel unit is acquired; the farther the distance between each target pixel unit and the current pixel unit, the greater the second preset correction voltage;

[0076] A difference value of the intermediate pixel data and the second preset correction voltage of each target pixel unit is acquired as the target pixel data.

[0077] Optionally, the target pixel unit and initial pixel data thereof are acquired, further comprising:

[0078] When the comparison result indicates that the difference value is less than or equal to the preset difference threshold, the current pixel unit is determined as a non-target pixel unit.

[0079] Optionally, the target pixel unit and initial pixel data thereof are acquired, comprising:

[0080] For each pixel unit in each row of pixel units of the display device, a difference value of pixel data of a current pixel unit and a next pixel unit is acquired;

[0081] comparing the difference value with a preset difference threshold value to obtain a comparison result;

[0082] When the comparison result indicates that the difference value is greater than the preset difference threshold value, determining the current pixel unit and at least one pixel unit after the current pixel unit as the target pixel unit, and obtaining pixel data of the target pixel unit as initial pixel data.

[0083] Optionally, the intermediate pixel data is subjected to second preset correction voltage compensation to obtain the target pixel data, including:

[0084] obtaining a second preset correction voltage of each target pixel unit; the farther the distance between each target pixel unit and the current pixel unit, the smaller the second preset correction voltage;

[0085] obtaining a difference value between the intermediate pixel data and the second preset correction voltage of each target pixel unit as the target pixel data.

[0086] Optionally, obtaining the target pixel unit and the initial pixel data of the target pixel unit further includes:

[0087] When the comparison result indicates that the difference value is less than or equal to the preset difference threshold value, determining that the current pixel unit is not a target pixel unit.

[0088] Optionally, the pixel driving circuit of the pixel unit includes a correction switch; a first end of the correction switch is electrically connected to a source electrode of a driving transistor of the pixel driving circuit, and a second end of the correction switch is electrically connected to a preset voltage line; correcting the initial pixel data of the target pixel unit to obtain the target pixel data, including:

[0089] in a non-display control phase, controlling the correction switch to be turned on to write a preset voltage level of the preset voltage line to the source electrode of the driving transistor; and

[0090] in a first stage of the non-display control phase, adjusting the initial pixel data of the target pixel unit to a first voltage value as the target pixel data; the first voltage value is greater than a gray scale voltage of the initial pixel data;

[0091] in a second stage of the non-display control phase, adjusting the initial pixel data of the target pixel unit to a second voltage value as the target pixel data; the second voltage value is equal to a preset voltage level output by the preset voltage line;

[0092] in a third stage of the non-display control phase, adjusting the initial pixel data of the target pixel unit to pixel data of a previous frame image as the target pixel data.

[0093] According to a third aspect of the present disclosure, a control device is provided, which is suitable for a display device, and the device comprises:

[0094] a target data acquisition module configured to correct initial pixel data of a target pixel unit to obtain target pixel data, wherein the target pixel data is used to increase a forward bias of a driving transistor of the target pixel unit in a normal working scenario;

[0095] a target data output module configured to output the target pixel data to the target pixel unit.

[0096] According to a fourth aspect of the present disclosure, a non-transitory computer readable storage medium is provided, which, when an executable computer program in the storage medium is executed by a processor, can implement the method according to any one of the second aspect.

[0097] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0098] The timing control module of the display device provided by the embodiments can correct initial pixel data of a target pixel unit to obtain target pixel data, wherein the target pixel data is used to increase a forward bias of a driving transistor of the target pixel unit in a normal working scenario, and then the target pixel data is output to a data signal driving module. In this way, the embodiments can increase the forward bias of the driving transistor of the target pixel unit by correcting the pixel data, so as to slow down or eliminate the face residual image and / or line residual image caused by the negative drift of the threshold voltage of the driving transistor, and improve the display quality.

[0099] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0100] Figure 1 FIG. 1 is a structural block diagram of a display device according to an embodiment of the present disclosure.

[0101] Figure 2 FIG. 2 is a schematic diagram of a pixel driving circuit according to an embodiment of the present disclosure.

[0102] Figure 3 FIG. 3 is a flowchart of a control method according to an embodiment of the present disclosure.

[0103] Figure 4 FIG. 4 is a flowchart of acquiring target pixel data according to an embodiment of the present disclosure.

[0104] Figure 5 FIG. 5 is a curve diagram of target pixel data of the same row in the case of displaying a black image according to an embodiment of the present disclosure.

[0105] Figure 6 A schematic diagram of a black and white checkerboard image for an embodiment of the present disclosure.

[0106] Figure 7 A flowchart of obtaining target pixel data for an embodiment of the present disclosure.

[0107] Figure 8 A curve diagram of pixel data before and after pixel data adjustment of a target pixel unit for an embodiment of the present disclosure.

[0108] Figure 9 A flowchart of obtaining initial pixel data for an embodiment of the present disclosure.

[0109] Figure 10 A curve diagram of pixel data before and after pixel data adjustment of a target pixel unit for an embodiment of the present disclosure.

[0110] Figure 11 A schematic diagram of a control timing for an embodiment of the present disclosure.

[0111] Figure 12 A timing diagram of a non-display control stage for an embodiment of the present disclosure.

[0112] Figure 13 A flowchart of a control method for an embodiment of the present disclosure.

[0113] Figure 14 A flowchart of another control method for an embodiment of the present disclosure.

[0114] Figure 15 A flowchart of yet another control method for an embodiment of the present disclosure.

[0115] Figure 16 A block diagram of a control device for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0116] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings, in which like reference numerals represent like elements, and secondary reference numerals represent elements with similar functions. The embodiments described in the following exemplary embodiments do not represent all the implementations consistent with the present disclosure. Instead, they only represent examples of devices consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0117] In practical applications, the OLED display screen will generate face residual image and / or line residual image in use. In the process of implementing the scheme of the present disclosure, the inventors found that the cause of the line residual image is that the light of the light-emitting device in the area with higher brightness will change the physical properties of the thin film transistor of the pixel driving circuit in the area with lower brightness, such as the concentration of carriers, and finally make the turn-on voltage of the thin film transistor smaller, that is, the turn-on voltage Vth of the thin film transistor is smaller, also known as the threshold voltage Vth generates negative drift. When the threshold voltage Vth generates negative drift, the brightness of the light-emitting device increases; when the brightness of a plurality of rows or a plurality of columns of light-emitting devices increases, line residual image is generated.

[0118] The current formula of the light-emitting device is shown in formula (1).

[0119] I gs = K(V gs -V th ) 2 ; (1)

[0120] In formula (1), I gs represents the current of the gate and the source of the driving transistor in the pixel driving circuit; K represents a simplified value of a plurality of physical parameters of the driving transistor, and the plurality of physical parameters are known when the driving transistor is determined, that is, K is known; V gs represents the voltage of the gate and the source of the driving transistor; V th represents the threshold voltage of the driving transistor.

[0121] In the present example, since V gs = V g -V s + V th1 , formula (1) can be converted into formula (2).

[0122] I gs = K(V g -V s + V th1 -V th2 ) 2 ; (2)

[0123] In formula (2), V g represents the voltage of the gate of the driving transistor; V s represents the voltage of the source of the driving transistor; V th1 and V th2 respectively represent the threshold voltage of the driving transistor.

[0124] In a theoretical case, V th1 and V th2 are equal, and a threshold voltage V th1 is added in the pixel data, and a threshold voltage Vth2 , the threshold voltage Vth is eliminated, and the driving transistor is compensated.

[0125] In practical applications, the threshold voltage V th2 is the actual turn-on voltage of the driving transistor itself. The threshold voltage V th1 is a detection value obtained by a sense line of the OLED display screen and stored in a timing controller (TCON). After obtaining the pixel data of each pixel unit, the threshold voltage V th1 is compensated to obtain the final pixel data Data. Since the sense line is detected at a certain period, for example, one hour, one day, or when the OLED display screen is turned on and off, the threshold voltage V th1 is obtained; and before the next detection, the threshold voltage V th1 is used to represent the threshold voltage V th2 .

[0126] It should be noted that at each detection time, V th1 and V th2 are equal; after this detection and before the next detection, the physical characteristics of the driving transistor are affected by the adjacent light emitting device, and the threshold voltage V th2 will produce a negative drift, resulting in a threshold voltage V th1 and a threshold voltage V th2 are no longer equal, V th1 and V th2 there is a difference between the two, resulting in a bright light emitting device, thereby producing line ghosting or surface ghosting.

[0127] To solve the above technical problems, the display device, the control method and device, and the storage medium are provided. The display device can include but is not limited to mobile phones, computers, tablets, e-books, watches, stereoscopic display screens, conference integrated machines, electronic whiteboards, and other devices with display functions. The display device includes a display device. Referring to Figure 1The display device comprises a timing control module, a pixel array, a scanning signal driving module and a data signal driving module. Each pixel unit in the pixel array comprises a light emitting device and a pixel driving circuit for driving the light emitting device to emit light. The structure of the light emitting device of the pixel unit can be various, and can be selected and arranged according to actual needs. For example, the light emitting device can be an OLED, a quantum dot light emitting diode (QLED) or a micro light emitting diode (Micro LED), which can be selected according to specific scenarios, and is not limited herein. The scanning signal driving module and the data signal driving module can be realized by using the circuits in the related art, and will not be described herein.

[0128] In an embodiment, the pixel driving circuit can be realized in different circuit structures, such as 7T1C, 8T1C, etc. A skilled person can select a suitable circuit structure according to a specific scenario to realize the method provided in the present disclosure. Figure 2 In an embodiment, the pixel driving circuit can be realized in different circuit structures, such as 7T1C, 8T1C, etc. A skilled person can select a suitable circuit structure according to a specific scenario to realize the method provided in the present disclosure.

[0129] In an embodiment, the pixel driving circuit can be realized in different circuit structures, such as 7T1C, 8T1C, etc. A skilled person can select a suitable circuit structure according to a specific scenario to realize the method provided in the present disclosure. Figure 2 The first end of the correction switch SW1 is electrically connected to the source of the driving transistor T2 of the pixel driving circuit, and the second end of the correction switch SW1 is electrically connected to a preset level line ref. The correction switch SW1 is used to write a preset level Vref of the preset level line ref into the source of the driving transistor T2 in a non-display control stage. It can be understood that the preset level Vref can be 0V or other voltages. In an embodiment, Vref = 0V.

[0130] In an embodiment, continuing to refer to Figure 2 The pixel driving circuit further comprises a first transistor T1, a third transistor T3 and a storage capacitor Cst. The first transistor T1 is connected in series between the data line Data and the gate of the driving transistor T2, and is used to control the writing of pixel data on the data line Data into the gate of the driving transistor T2, thereby controlling the luminous intensity of the light emitting device. The storage capacitor Cst is used to store the pixel data, so that the driving transistor T2 can continuously output a driving current to drive the light emitting device to emit light. The third transistor T3 and the correction switch SW1 jointly write the preset level Vref into the source of the driving transistor T2 as a reference level.

[0131] It should be noted that the control signal G1 of the first transistor T1 can be provided by the GOA circuit of 10T3C, 12T3C, 13T3C or 16T3C, which can be selected according to the specific scene, and is not limited here. The control signal G2 of the third transistor T3 can be provided by the GOA circuit of 10T3C, 12T3C, 13T3C or 16T3C, which can be selected according to the specific scene, and is not limited here.

[0132] It can be understood that, Figure 2 Each transistor in the circuit shown can be implemented by an N-type transistor or a P-type transistor. For the convenience of describing the scheme, Figure 2 The driving transistor T2 in the circuit shown is implemented by an N-type switching device, that is, its start voltage is high level; the first transistor T1 and the third transistor T3 can be arbitrarily selected, and are not limited here.

[0133] In combination with Figures 1-2 The display device shown, the timing control module (TCON) in the display device can be configured to perform a control method, see Figure 3 , comprising steps 31-32.

[0134] In step 31, the timing control module corrects the initial pixel data of the target pixel unit to obtain target pixel data; the target pixel data is used to increase the forward bias voltage of the driving transistor of the target pixel unit in the normal working scenario.

[0135] In an example, the target pixel unit includes a pixel unit to be displayed in a black pattern. The timing control module can correct the initial pixel data of the target pixel unit to obtain target pixel data, see Figure 4 , comprising steps 41-43.

[0136] In step 41, in the display control stage, it is determined whether the initial pixel data of the target pixel unit is a first preset gray scale.

[0137] In this step, the display control stage (also called Active stage) is a stage of driving the light emitting device to emit light according to the preset control timing, for example, the display control stage can include an initialization stage, a data writing stage, a light emitting stage and a reset stage, etc.

[0138] In this step, the timing control module can obtain the pixel data of the image to be displayed, and the pixel data is referred to as initial pixel data in the subsequent steps to distinguish it. Then, the timing control module can determine whether the initial pixel data of each pixel unit is a first preset gray scale, for example, gray scale 0, that is, the pixel unit needs to display black or the pixel unit does not emit light. In this way, the timing control module can obtain the target pixel unit whose initial pixel data is the first preset gray scale, and the non-target pixel unit whose initial pixel data is not the first preset gray scale.

[0139] In step 42, when it is determined that it is the first preset gray scale, the initial pixel data is subjected to preset threshold voltage compensation to obtain intermediate pixel data.

[0140] In this step, when it is determined that the initial pixel data is the first preset gray scale, the timing control module can perform preset threshold voltage compensation on the initial pixel data to obtain intermediate pixel data. Assuming that the initial pixel data is Data0, the preset threshold voltage is Vth1, and the intermediate pixel data is Data1, then Data1 = Data0 + Vth1. In combination with the content of formula (1), the compensation of the pixel data in this step is compensation of V gs to eliminate the threshold voltage of the driving transistor and ensure accurate opening or closing of the driving transistor.

[0141] In step 43, the intermediate pixel data is subjected to first preset correction voltage compensation to obtain the target pixel data; the target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and the light emitting device of the target pixel unit not to emit light.

[0142] In this step, the display device stores a first preset correction voltage, for example, the first preset correction voltage can be stored in the timing control module of the display device. It should be noted that the values of the first preset correction voltages of the pixel units are different, that is, each pixel unit is provided with a first preset correction voltage matched with itself. The first preset correction voltage of each pixel unit can be obtained by testing in the following ways, including:

[0143] The timing control module can initialize the correction voltage, and set the correction voltage to an initial value, which can be 0V. Then, the timing control module increases the correction voltage according to a preset step size. Assuming that the initial value of the correction voltage is A0 (such as 0V, which can be adjusted), and the step size is S (such as 0.001V, which can be adjusted), then A1 = A0 + S1 = A0 + S, A2 = A0 + S2 = A0 + 2S, and so on, An = A0 + nS, thereby obtaining a plurality of correction voltages, which are to be tested values. The timing control module can obtain the difference between the preset threshold voltage and the correction voltage as the test pixel voltage when each correction voltage is obtained, that is, the test pixel voltage is Vth1-An. It should be noted that the above-mentioned preset threshold voltage can be the latest detection value of the sensing line of the display device, thereby ensuring the reliability of the correction process.

[0144] It can be understood that, considering that the initial pixel data is the first preset gray scale, the value of the initial pixel data is 0, and at this time the pixel unit displays a black image, that is, the pixel unit does not emit light, therefore, the difference Vth1-An between the preset threshold voltage and the correction voltage can be taken as the test pixel voltage 0 + Vth1-An.

[0145] Then, after the display device is used for a certain time, for example, watching a video for a preset time, reading a text for a preset time, browsing a webpage for a preset time, and the like, in order to simulate the influence of the user usage scenario on the display device, that is, the driving transistor in the pixel driving circuit can produce negative drift, the timing control module can output the above-mentioned test pixel voltage to the target pixel unit.

[0146] Continuing to combine formula (1) and formula (2), since the threshold voltage Vth2 can produce negative drift, if the threshold voltage Vth2 does not produce negative drift, then the test pixel voltage Vth1-An is less than the threshold voltage Vth2, at this time the driving transistor cannot be turned on, that is, the target pixel unit does not emit light. If the threshold voltage Vth2 produces negative drift, then the test pixel voltage Vth1-An can be greater than, equal to, or less than the threshold voltage Vth2, wherein when it is less than or equal to the threshold voltage Vth2, at this time the driving transistor cannot be turned on, that is, the target pixel unit does not emit light; if it is greater than the threshold voltage Vth2, at this time the driving transistor can be turned on, that is, the target pixel unit emits light.

[0147] It can be understood that, when the target pixel unit does not emit light, the test pixel voltage is called the first test pixel voltage, and the timing control module can take the correction voltage corresponding to the first test pixel voltage as the first preset correction voltage.

[0148] It can be understood that when the target pixel unit emits light, the timing control module can output the next test pixel voltage of the current test pixel voltage to the target pixel unit until the target pixel unit stops emitting light. The timing control module can take the correction voltage corresponding to the first test pixel voltage as the first preset correction voltage.

[0149] Through the above process, the timing control module can detect the first preset correction voltage of each pixel unit and store it to a specified location of the display device, such as the timing control module, a local memory, etc., which is not limited herein.

[0150] In this step, the timing control module can obtain the first preset correction voltage corresponding to the target pixel unit. Then, the timing control module can obtain the difference between the intermediate pixel data of each target pixel unit and the first preset correction voltage as the target pixel data. In this way, through one compensation and one correction of the initial pixel data in this step, the target pixel unit can still maintain a positive bias when displaying a black image, i.e., Vgs(=Vg-Vs) is greater than 0 and less than Vth, and the voltage driving the transistor gate is higher than the source of the driving transistor under the condition that the target pixel unit does not emit light. Since the driving transistor maintains a positive bias, the residual image caused by the negative drift of the threshold voltage of the driving transistor can be alleviated.

[0151] In this example, since compensation and correction operations are performed on each pixel unit, the target pixel data detected when the same row of pixel units displays a black image is no longer 0, but a value related to the threshold voltage Vth of each pixel unit, as shown in Figure 5 .

[0152] In another example, the target pixel unit includes a low gray scale pixel unit with a large adjacent gray scale difference and / or at least one adjacent pixel unit. Taking a black and white checkerboard image as an example, referring to Figure 6 , the gray scale difference between the first pixel unit 61 and the second pixel unit 62 is large, and the probability of generating residual image is large, so the pixel data of these target pixel units needs to be processed. Referring to Figure 7 , the timing control module can correct the initial pixel data of the target pixel unit to obtain the target pixel data, including steps 71-73.

[0153] In step 71, during the display control stage, the target pixel unit and its initial pixel data are obtained.

[0154] In this step, in the display control stage, the timing control module can obtain the target pixel unit and its initial pixel data, including: for each pixel unit in each row of pixel units of the display device, the timing control module can obtain the difference value of the pixel data of the current pixel unit and the next pixel unit, which can reflect the difference in display brightness between the two pixel units. Then, the timing control module can compare the difference value with the preset difference threshold value in size to obtain a comparison result.

[0155] When the comparison result indicates that the difference value is greater than the preset difference threshold value, the timing control module can determine that the current pixel unit and at least one pixel unit before it are target pixel units, and obtain the pixel data of the target pixel unit as the initial pixel data. It should be noted that the preset difference threshold value can be pre-set, and in the case that the difference between the brightness of two pixel units can be distinguished, the corresponding value falls within the protection scope of the present disclosure.

[0156] When the comparison result indicates that the difference value is less than or equal to the preset difference threshold value, the timing control module can determine that the current pixel unit is not a target pixel unit, i.e., the current pixel unit is a unit whose pixel data does not need to be corrected.

[0157] It should be noted that the preset difference threshold value can be pre-set, which is the minimum value tested in the case that the threshold voltage of the high gray scale pixel unit can affect the threshold voltage of the adjacent low gray scale pixel unit, or the pixel difference that can distinguish the negative drift of the threshold voltage of the pixel unit. A suitable preset difference threshold value can be selected according to the specific scene, which is not limited here.

[0158] After determining the target pixel unit, the timing control module can obtain the initial pixel data of the target pixel unit.

[0159] In step 72, the initial pixel data of the target pixel unit is subjected to preset threshold voltage compensation to obtain intermediate pixel data.

[0160] In this step, the scheme of step 72 is the same as that of step 42, and the details are referred to the content of step 42, which will not be repeated here. In this way, the timing control module can obtain the intermediate pixel data of the target pixel unit.

[0161] In step 73, the intermediate pixel data is subjected to second preset correction voltage compensation to obtain the target pixel data; the target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and make the luminous intensity of the light emitting device of the target pixel unit different from that of the adjacent light emitting device.

[0162] In this step, the display device stores a second preset correction voltage. The second preset correction voltage can be obtained in the same way as the first preset correction voltage, and the second preset correction voltage of each target pixel unit is the same.

[0163] In this step, the timing control module can compensate the intermediate pixel data by the second preset correction voltage to obtain target pixel data. For example, the timing control module can obtain the second preset correction voltage of each target pixel unit, and the farther the distance between the target pixel unit and the current pixel unit, the greater the second preset correction voltage. Then, the timing control module can obtain the difference between the intermediate pixel data of each target pixel unit and the second preset correction voltage as the target pixel data.

[0164] For example, the current pixel unit is n, and the initial pixel data is L(n). The next pixel unit of the current pixel unit n is n+1, and the initial pixel data is L(n+1). The previous pixel unit of the current pixel unit n is n-1, and the initial pixel data is L(n-1). The previous pixel unit of the previous pixel unit n-1 is n-2, and the initial pixel data is L(n-2). The corrected target pixel data is: the target pixel data L(n) of the current pixel unit n is L(n)+Vth(n); the target pixel data L(n-1) of the previous pixel unit n-1 of the current pixel unit n is L(n-1)+Vth(n-1)-b; and the target pixel data L(n-2) of the previous pixel unit n-2 of the previous pixel unit n-1 is L(n-2)+Vth(n-2)-c.

[0165] In this step, the effect of the pixel data of the target pixel unit before and after adjustment is shown in Figure 8 . Referring to Figure 8 , the first curve (i.e. the upper curve) is the initial pixel data of the black grid region and the white grid before adjustment; and the second curve (i.e. the lower curve) is the target pixel data of the black grid region and the white grid after adjustment. By comparison and analysis, the target pixel data of the three target pixel units close to the white grid region of the second curve increases in turn, so that the luminance of the pixel units of the black grid region and the white grid region gradually transitions from black to white, thereby avoiding the difference between the pixel data of the adjacent two pixel units being too large. It can be understood that, since the target pixel data is corrected to increase the forward bias of the driving transistor, the light intensity received by the black grid region can be reduced, the light effect of the target pixel unit can be reduced, the negative drift of the threshold voltage of the target pixel unit can be reduced, and the line residual image phenomenon can be further alleviated.

[0166] In yet another example, the target pixel unit includes a high gray scale pixel unit with a large difference in adjacent gray scale and / or at least one pixel unit adjacent thereto. In the case of a black and white checkerboard image, referring to Figure 6 , the first pixel unit has a large difference in gray scale from the second pixel unit, and the probability of ghosting is large, and thus the pixel data of these target pixel units needs to be processed. Referring to Figure 9 , the timing control module can correct the initial pixel data of the target pixel unit to obtain target pixel data, including steps 91-93.

[0167] In step 91, for each pixel unit in each row of pixel units of the display device, the difference between the pixel data of the current pixel unit and the next pixel unit is obtained.

[0168] In this step, the scheme of step 91 is the same as that of step 71, and the details are described in step 71, which will not be repeated here.

[0169] In step 92, the difference is compared with a preset difference threshold to obtain a comparison result.

[0170] In this step, the scheme of step 92 is the same as that of step 72, and the details are described in step 72, which will not be repeated here.

[0171] In step 93, when the comparison result indicates that the difference is greater than the preset difference threshold, the current pixel unit and at least one pixel unit after the current pixel unit are determined as the target pixel unit, and the pixel data of the target pixel unit is obtained as the initial pixel data.

[0172] In this step, the scheme of step 93 is similar to that of step 73, and the difference is that at least one pixel unit after the current pixel unit is used as the target pixel unit, and the details are described in step 73, which will not be repeated here.

[0173] Taking three target pixel units as an example, the current pixel unit is n, and the initial pixel data of the current pixel unit is L(n); the next pixel unit of the current pixel unit n is n+1, and the initial pixel data of the next pixel unit is L(n+1); the previous pixel unit of the current pixel unit n is n-1, and the initial pixel data of the previous pixel unit is L(n-1); the previous pixel unit of the previous pixel unit n-1 is n-2, and the initial pixel data of the previous pixel unit is L(n-2), and the corrected target pixel data is: the target pixel data L(n+1) of the next pixel unit n+1 of the current pixel unit n is L(n+1)+Vth(n+1)-d; the target pixel data L(n+2) of the next pixel unit n+2 of the next pixel unit n+1 is L(n+2)+Vth(n+2)-e; the target pixel data L(n+3) of the next pixel unit n+3 of the next pixel unit n+2 is L(n+3)+Vth(n+3)-f.

[0174] In this step, the effect of the pixel data of the target pixel unit before and after adjustment is as shown in Figure 10 Figure 10 The first curve (i.e. the upper curve) is the initial pixel data of the black grid region and the white grid before adjustment, and the second curve (i.e. the lower curve) is the target pixel data of the black grid region and the white grid after adjustment. By comparison and analysis, the target pixel data of the three target pixel units close to the black grid region of the second curve increases in turn, so that the luminance of the pixel units of the black grid region and the white grid gradually transitions from black to white, thereby avoiding the difference between the pixel data of the adjacent two pixel units being too large. It can be understood that, since the target pixel data is corrected to increase the forward bias of the driving transistor, the light intensity received by the black grid region can be reduced, the light effect of the target pixel unit can be reduced, the negative drift of the threshold voltage of the target pixel unit can be reduced, and the line residual image phenomenon can be further alleviated.

[0175] In yet another example, referring to Figure 11 , the non-display control stage (also referred to as the Blank stage) refers to the stage between the display of each frame of image and the display of the next frame of image, or the time gap between the last row of the previous frame of image and the first row of the next frame of image. In combination with the circuit shown in Figure 2 , in the non-display control stage, the timing control module can control the correction switch SW1 to be turned on, so as to write the preset level Vref of the preset level line ref into the source electrode of the driving transistor.

[0176] Referring to Figure 12 ​In the first stage of the non-display control stage, the timing control module can adjust the initial pixel data of the target pixel unit to a first voltage value V1 as the target pixel data; the first voltage value is greater than the gray voltage of the initial pixel data; the value range of the first voltage value is 5-15V, and in an example, the first voltage value is 15V.

[0177] In the second stage V2 of the non-display control stage, the timing control module can adjust the initial pixel data of the target pixel unit to a second voltage value as the target pixel data; the second voltage value is equal to the preset level output by the preset level line; in an example, the value of the second voltage value is 0.

[0178] In the third stage of the non-display control stage, the timing control module can adjust the initial pixel data of the target pixel unit to the pixel data Data(n-1) of the previous frame image as the target pixel data.

[0179] In the first stage of the non-display control stage, the driving transistor of the pixel driving circuit is in a forward bias state; in the second stage, the target pixel data is cleared, so that the target pixel unit is in a non-display state; in the third stage, the pixel data of the previous frame image is restored, and the driving transistor continues to be in a forward bias state. Since the forward bias is added in the first stage, the residual image problem caused by the threshold voltage negative drift of the driving transistor can be alleviated.

[0180] In step 32, the target pixel data is output to the target pixel unit.

[0181] In this step, the timing control module can output the target pixel data to the target pixel unit, so that the luminous intensity of the light emitting device of the target pixel unit matches the target pixel data.

[0182] So far, the display device provided by the scheme of the embodiment can correct the initial pixel data of the target pixel unit to obtain the target pixel data; the target pixel data is used to increase the forward bias of the driving transistor of the target pixel unit in a normal working scenario; then, the target pixel data is output to the target pixel unit. In this way, the embodiment can increase the forward bias of the driving transistor of the target pixel unit by correcting the pixel data, so as to slow down or eliminate the face residual image and / or line residual image caused by the threshold voltage negative drift of the driving transistor, which is beneficial to improve the display quality.

[0183] Next, a control method provided by the present disclosure is described in combination with various embodiments, which includes:

[0184] Embodiment one

[0185] Reference is made to Figure 13For example, taking a black and white checkerboard as an example, the initial pixel data Data of the pixel unit in the black grid area is 0; the timing control module can determine whether the pixel data of the image to be displayed is 0; when the pixel data is 0, the pixel unit is the target pixel unit, at this time, the initial pixel data Data is added with the preset threshold voltage Vth1 of the pixel unit itself, and then the first preset correction voltage of the pixel unit itself is subtracted, that is, Vgs = 0 + Vth1 - a, so that Vgs < Vth2, not only can the target pixel unit be ensured not to emit light, but also the driving transistor can be ensured to be forward biased.

[0186] In this way, in the present example, the target pixel data is obtained by correcting the initial pixel data based on the increase of Vth-a, and the difference between each pixel unit and the threshold voltage and the preset correction data a is matched, so that the data value tested when displaying a black image is no longer 0, but a value related to the threshold voltage Vth value of the pixel unit, so that the target pixel data of each pixel unit is not the same, and presents a wave shape as shown in Figure 5 .

[0187] Embodiment Two

[0188] For example, taking a checkerboard picture as an example, referring to Figure 14 , the timing control module can obtain the difference between the pixel data of the adjacent two pixel units, and when the difference is greater than the preset difference threshold (Lref), it can be determined that there is a target pixel unit with a large difference between high and low gray scales in the image to be displayed. For example, the timing control module compares the input pixel data, and compares the initial pixel data of the nth column pixel unit and the n+1 column unit for each row of pixel units; when the difference between the initial pixel data of the two pixel units is greater than the preset difference threshold, it is determined that the pixel units in the nth column, the n-1 column and the n-2 column are target pixel units, and the initial pixel data of each target pixel unit is compensated and corrected, and the specific method is described in steps 72 and 73 of the example scheme shown in Figure 7 , that is, the initial pixel data of the target pixel units in the nth column, the n-1 column and the n-2 column is increased in a decreasing manner, L(n) = L(n) + Vth(n), L(n-1) = L(n-1) + Vth(n-1) - b and L(n-2) = L(n-2) + Vth(n-2) - c, that is, b is less than c, so that the target pixel data of the target pixel units in the n-2 column, the n-1 column and the n column presents a stepped rising relationship, and the effect is as shown in Figure 8 .

[0189] In the present embodiment, the driving transistor of the pixel unit located at the edge of the black grid area can be forward biased, which can offset or alleviate the negative drift of the threshold voltage caused by the light irradiation of the white grid area pixel unit, so as to alleviate or eliminate the line residual image.

[0190] Example 3

[0191] Continuing with the example of a chessboard grid, see [link to example]. Figure 15 For each row of pixel units, the timing control module can compare the initial pixel data of the nth column and the (n+1)th column. When the difference between the initial pixel data of the two pixel units is greater than the preset difference threshold, the timing control module can determine the pixel units of the (n+1)th, (n+2)th, and (n+3)th columns as target pixel units. At this time, the initial pixel data of the pixel units of the (n+1)th, (n+2)th, and (n+3)th columns can be increased incrementally as follows: L(n+1) = L(n+1) + Vth(n+1) - d, L(n+2) = L(n+2) + Vth(n+2) - e, and L(n+3) = L(n+3) + Vth(n+3) - f. The relationship between the second preset correction voltages d, e, and f is d > e > f.

[0192] In this way, the illumination effect on the pixel units at the edge of the black grid area in this embodiment will be reduced, alleviating the phenomenon of negative drift of the threshold voltage Vth, and thus alleviating the problem of line retention.

[0193] Based on the display device provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a control method, which can be found in [reference needed]. Figures 3-13 The solutions provided in the examples will not be elaborated upon here.

[0194] Based on the control method provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a control device, suitable for display devices, see [link to relevant documentation]. Figure 16 The device includes:

[0195] The target data acquisition module 161 is used to correct the initial pixel data of the target pixel unit to obtain target pixel data; the target pixel data is used to increase the forward bias voltage of the driving transistor of the target pixel unit under normal working conditions;

[0196] The target data output module 162 is used to output the target pixel data to the target pixel unit.

[0197] In one embodiment, the target data acquisition module includes:

[0198] The initial pixel data determination submodule is used to determine, during the display control stage, whether the initial pixel data of the target pixel unit is a first preset grayscale.

[0199] The intermediate data determination submodule is used to perform preset threshold voltage compensation on the initial pixel data when it is determined to be the first preset gray level, so as to obtain intermediate pixel data.

[0200] a target data acquisition submodule configured to perform first preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data;

[0201] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and keep the light emitting device of the target pixel unit from emitting light.

[0202] In an embodiment, the target data acquisition submodule comprises:

[0203] a first correction voltage acquisition unit configured to acquire a first preset correction voltage corresponding to the target pixel unit;

[0204] a target data acquisition unit configured to acquire a difference between the intermediate pixel data and the first preset correction voltage as the target pixel data.

[0205] In an embodiment, the first correction voltage acquisition unit comprises:

[0206] a correction voltage adjustment subunit configured to set a correction voltage to an initial value and increase the correction voltage by a preset step length;

[0207] a test voltage acquisition subunit configured to acquire a difference between the preset threshold voltage and the correction voltage as a test pixel voltage;

[0208] a first voltage acquisition subunit configured to sequentially output the test pixel voltage to the target pixel unit to obtain a first test pixel voltage that stops the target pixel from emitting light;

[0209] a first correction voltage acquisition subunit configured to acquire a correction voltage corresponding to the first test pixel voltage as the first preset correction voltage.

[0210] In an embodiment, the target data acquisition module comprises:

[0211] a target pixel acquisition submodule configured to acquire a target pixel unit and initial pixel data thereof in a display control stage;

[0212] an intermediate data acquisition submodule configured to perform preset threshold voltage compensation on the initial pixel data of the target pixel unit to obtain intermediate pixel data;

[0213] a target data acquisition submodule configured to perform second preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data;

[0214] The target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and keep the light emitting device of the target pixel unit from emitting light.

[0215] In an embodiment, the target pixel obtaining submodule comprises:

[0216] a difference obtaining unit configured to obtain, for each pixel unit in each row of pixel units of the display device, a difference between pixel data of the current pixel unit and pixel data of a next pixel unit;

[0217] a comparison result obtaining unit configured to compare the difference with a preset difference threshold to obtain a comparison result;

[0218] a target pixel determining unit configured to, when the comparison result indicates that the difference is greater than the preset difference threshold, determine the current pixel unit and at least one pixel unit before the current pixel unit as the target pixel unit, and obtain pixel data of the target pixel unit as initial pixel data.

[0219] In an embodiment, the target data obtaining submodule comprises:

[0220] a second correction voltage obtaining unit configured to obtain a second preset correction voltage of each target pixel unit; the farther the distance between each target pixel unit and the current pixel unit, the greater the second preset correction voltage;

[0221] a target data obtaining unit configured to obtain a difference between intermediate pixel data of each target pixel unit and the second preset correction voltage as the target pixel data.

[0222] In an embodiment, the target pixel determining unit is further configured to, when the comparison result indicates that the difference is less than or equal to the preset difference threshold, determine that the current pixel unit is not a target pixel unit.

[0223] In an embodiment, the target pixel obtaining submodule comprises:

[0224] a difference obtaining unit configured to obtain, for each pixel unit in each row of pixel units of the display device, a difference between pixel data of the current pixel unit and pixel data of a next pixel unit;

[0225] a comparison result obtaining unit configured to compare the difference with a preset difference threshold to obtain a comparison result;

[0226] a target pixel obtaining unit configured to, when the comparison result indicates that the difference is greater than the preset difference threshold, determine the current pixel unit and at least one pixel unit after the current pixel unit as the target pixel unit, and obtain pixel data of the target pixel unit as initial pixel data.

[0227] In an embodiment, the target data obtaining submodule comprises:

[0228] a second correction voltage acquisition unit, configured to acquire a second preset correction voltage of each target pixel unit, wherein the farther the distance between each target pixel unit and the current pixel unit is, the smaller the second preset correction voltage is;

[0229] a target data acquisition unit, configured to acquire a difference between intermediate pixel data of each target pixel unit and the second preset correction voltage as the target pixel data.

[0230] In an embodiment, the target pixel acquisition unit is further configured to determine that the current pixel unit is not a target pixel unit when the comparison result indicates that the difference is less than or equal to the preset difference threshold.

[0231] In an embodiment, the pixel driving circuit of the pixel unit includes a correction switch, a first end of the correction switch is electrically connected to a source of a driving transistor of the pixel driving circuit, and a second end of the correction switch is electrically connected to a preset voltage line.

[0232] a correction switch control sub-module, configured to control the correction switch to be turned on in a non-display control stage, so as to write a preset voltage of the preset voltage line to the source of the driving transistor.

[0233] a target pixel acquisition sub-module, configured to adjust initial pixel data of the target pixel unit to a first voltage value as the target pixel data in a first stage of the non-display control stage, wherein the first voltage value is greater than a gray scale voltage of the initial pixel data; adjust the initial pixel data of the target pixel unit to a second voltage value as the target pixel data in a second stage of the non-display control stage, wherein the second voltage value is equal to a preset voltage output by the preset voltage line; and adjust the initial pixel data of the target pixel unit to pixel data of a previous frame image as the target pixel data in a third stage of the non-display control stage.

[0234] It should be noted that the device and method embodiments shown in the present embodiment match the content of the method embodiments, and the content of the method embodiments can be referred to, which will not be described herein.

[0235] In some possible embodiments, the present disclosure further provides a non-transitory computer-readable storage medium, which, when an executable computer program in the storage medium is executed by a processor, can implement the method as described above.

[0236] The terminology used in the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical terms or scientific terms used in the disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The singular forms "a," "an," and "the" used in the specification and in the appended claims are not intended to refer to only a singular object, but rather to a single or several objects unless otherwise indicated by the context. The terms "comprising," "including," and "containing" used in the specification and the appended claims are inclusive or open-ended and do not exclude additional, unrecited elements or method steps. The terms "coupled," "connected," and "connecting" used in the specification and the appended claims are intended to refer to a coupling or path by which one means is connected to another means, and are not restricted to a direct or physical connection or path. The terms "a" or "an" used in the specification and the appended claims are intended to refer to one or more than one, unless otherwise indicated by the context. The term "another" used in the specification and the appended claims is intended to refer to at least one additional object. The term "comprising" used in the specification and the appended claims is intended to mean including at least the recited elements or steps, but not excluding others. The term "coupled" used in the specification and the appended claims is intended to mean either a direct connection between two elements or an indirect connection through one or more additional elements. The term "and / or" used in the specification and the appended claims is intended to mean either one or both of the recited elements.

[0237] For the method embodiments, since they are substantially corresponding to the device embodiments, the relevant description of the device embodiments can be referred to. The method embodiments and the device embodiments are complementary to each other.

[0238] The preferred embodiments of the disclosure have been described above with the specific details. Obviously, the modifications, equivalent replacements, improvements and the like made within the spirit and principle of the disclosure should be included in the scope of protection of the disclosure.

Claims

1. A display device, characterized in that, The display panel comprises a timing control module, a pixel array and a data signal driving module; each pixel unit of the pixel array comprises a light emitting device and a pixel driving circuit for driving the light emitting device to emit light; The pixel driving circuit comprises a driving transistor; the timing control module is electrically connected with the data signal driving module, and the data signal driving module is electrically connected with each pixel unit; The timing control module is configured to correct initial pixel data of a target pixel unit to obtain target pixel data, and output the target pixel data to the data signal driving module; The target pixel data is used to increase forward bias voltage of a driving transistor in the pixel driving circuit of the target pixel unit in a normal working scenario; The data signal driving module is configured to output a driving voltage matched with the target pixel data to the target pixel unit, so that the driving transistor maintains forward bias voltage in the normal working scenario; The timing control module corrects initial pixel data of a target pixel unit to obtain target pixel data, comprising: In a display control stage, it is determined whether the initial pixel data of the target pixel unit is a first preset gray scale; the first preset gray scale refers to a gray scale voltage value that causes the light emitting device not to emit light; When it is determined that the initial pixel data is the first preset gray scale, preset threshold voltage compensation is performed on the initial pixel data to obtain intermediate pixel data; First preset correction voltage compensation is performed on the intermediate pixel data to obtain the target pixel data; The target pixel data is used to maintain forward bias voltage of the driving transistor of the target pixel unit and cause the light emitting device of the target pixel unit not to emit light.

2. The display device of claim 1, wherein, The timing control module performs first preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data, comprising: A first preset correction voltage corresponding to the target pixel unit is obtained; A difference between the intermediate pixel data and the first preset correction voltage is obtained as the target pixel data.

3. The display device of claim 1, wherein, The timing control module obtains the first preset correction voltage corresponding to the target pixel unit, comprising: The correction voltage is set as an initial value, and the correction voltage is increased by a preset step length; A difference between the preset threshold voltage and the correction voltage is obtained as a test pixel voltage; The test pixel voltage is output to the target pixel unit in sequence to obtain a first test pixel voltage that causes the target pixel to stop emitting light; The correction voltage corresponding to the first test pixel voltage is taken as the first preset correction voltage.

4. The display device of claim 1, wherein, The timing control module corrects initial pixel data of a target pixel unit to obtain target pixel data, comprising: In a display control stage, a target pixel unit and initial pixel data thereof are obtained; Preset threshold voltage compensation is performed on the initial pixel data of the target pixel unit to obtain intermediate pixel data; Second preset correction voltage compensation is performed on the intermediate pixel data to obtain the target pixel data; The target pixel data is used to maintain forward bias voltage of the driving transistor of the target pixel unit and cause the light emitting device of the target pixel unit to emit light with a light intensity different from that of an adjacent light emitting device.

5. The display device of claim 4, wherein, The timing control module obtains a target pixel unit and initial pixel data of the target pixel unit, and the method comprises the steps of: For each pixel unit in each row of pixel units of the display device, a difference value of pixel data of a current pixel unit and a next pixel unit is obtained; A comparison result is obtained by comparing the difference value with a preset difference threshold value; When the comparison result indicates that the difference value is greater than the preset difference threshold value, it is determined that the current pixel unit and at least one pixel unit before the current pixel unit are the target pixel unit, and pixel data of the target pixel unit is obtained as the initial pixel data.

6. The display device of claim 5, wherein, The timing control module performs second preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data, and the method comprises the steps of: A second preset correction voltage of each target pixel unit is obtained; the farther the distance between each target pixel unit and the current pixel unit, the greater the second preset correction voltage; A difference value of the intermediate pixel data and the second preset correction voltage of each target pixel unit is obtained as the target pixel data.

7. The display device of claim 5, wherein, The timing control module obtains a target pixel unit and initial pixel data of the target pixel unit, and the method further comprises the steps of: When the comparison result indicates that the difference value is less than or equal to the preset difference threshold value, it is determined that the current pixel unit is not the target pixel unit.

8. The display device of claim 4, wherein, The timing control module obtains a target pixel unit and initial pixel data of the target pixel unit, and the method comprises the steps of: For each pixel unit in each row of pixel units of the display device, a difference value of pixel data of a current pixel unit and a next pixel unit is obtained; A comparison result is obtained by comparing the difference value with a preset difference threshold value; When the comparison result indicates that the difference value is greater than the preset difference threshold value, it is determined that the current pixel unit and at least one pixel unit after the current pixel unit are the target pixel unit, and pixel data of the target pixel unit is obtained as the initial pixel data.

9. The display device of claim 8, wherein, The timing control module performs second preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data, and the method comprises the steps of: A second preset correction voltage of each target pixel unit is obtained; the farther the distance between each target pixel unit and the current pixel unit, the smaller the second preset correction voltage; A difference value of the intermediate pixel data and the second preset correction voltage of each target pixel unit is obtained as the target pixel data.

10. The display device of claim 8, wherein, The timing control module obtains a target pixel unit and initial pixel data of the target pixel unit, and the method further comprises the steps of: When the comparison result indicates that the difference value is less than or equal to the preset difference threshold value, it is determined that the current pixel unit is not the target pixel unit.

11. The display device of claim 1, wherein, The pixel driving circuit of the pixel unit comprises a correction switch; a first end of the correction switch is electrically connected to a source electrode of a driving transistor of the pixel driving circuit, and a second end of the correction switch is electrically connected to a preset voltage line; The timing control module corrects the initial pixel data of the target pixel unit to obtain the target pixel data, and the method comprises the steps of: In a non-display control stage, the correction switch is controlled to be turned on, so as to write a preset voltage of the preset voltage line to the source electrode of the driving transistor; and In a first stage of the non-display control stage, the initial pixel data of the target pixel unit is adjusted to a first voltage value as the target pixel data; the first voltage value is greater than the gray scale voltage of the initial pixel data; In a second stage of the non-display control stage, the initial pixel data of the target pixel unit is adjusted to a second voltage value as the target pixel data; the second voltage value is equal to the preset level output by the preset level line; In a third stage of the non-display control stage, the initial pixel data of the target pixel unit is adjusted to the pixel data of the previous frame image as the target pixel data.

12. A control method characterized by, The method is suitable for a display device, and the method comprises: correcting initial pixel data of a target pixel unit to obtain target pixel data; the target pixel data is used to increase forward bias voltage of a driving transistor of the target pixel unit in a normal working scenario; outputting the target pixel data to the target pixel unit; correcting initial pixel data of a target pixel unit to obtain target pixel data, comprising: in a display control stage, determining whether the initial pixel data of the target pixel unit is a first preset gray scale; the first preset gray scale refers to a gray scale voltage value that causes a light emitting device not to emit light; when it is determined that the initial pixel data is the first preset gray scale, performing preset threshold voltage compensation on the initial pixel data to obtain intermediate pixel data; performing first preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data; the target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and keep the light emitting device of the target pixel unit from emitting light.

13. A control device characterized by comprising: The device is suitable for a display device, and the device comprises: a target data acquisition module configured to correct initial pixel data of a target pixel unit to obtain target pixel data; the target pixel data is used to increase forward bias voltage of a driving transistor of the target pixel unit in a normal working scenario; a target data output module configured to output the target pixel data to the target pixel unit; a timing control module configured to correct initial pixel data of a target pixel unit to obtain target pixel data, comprising: in a display control stage, determining whether the initial pixel data of the target pixel unit is a first preset gray scale; the first preset gray scale refers to a gray scale voltage value that causes a light emitting device not to emit light; when it is determined that the initial pixel data is the first preset gray scale, performing preset threshold voltage compensation on the initial pixel data to obtain intermediate pixel data; performing first preset correction voltage compensation on the intermediate pixel data to obtain the target pixel data; the target pixel data is used to keep the driving transistor of the target pixel unit in forward bias and keep the light emitting device of the target pixel unit from emitting light.

14. A non-transitory computer-readable storage medium, comprising: When the executable computer program in the storage medium is executed by the processor, the method in claim 12 can be implemented.

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