Display panel compensation method and display device

Abstract

The embodiments of the present invention provide a compensation method and a display device for a display panel, which relate to the field of display technology and can improve the improvement effect of the mura phenomenon. The compensation method for the display panel includes: obtaining a first display grayscale required to be displayed by a first sub-pixel in a to-be-displayed image, and obtaining a first display data voltage corresponding to the first display grayscale; judging whether the first display data voltage is greater than a low-brightness boundary voltage, and if so, obtaining a first compensation data voltage corresponding to the first sub-pixel according to the first display grayscale; judging whether the first compensation data voltage is in a dark state voltage interval according to a light-on voltage corresponding to the first sub-pixel, and if so, compensating the first sub-pixel using the light-on voltage corresponding to the first sub-pixel, and if not, compensating the first sub-pixel using the first compensation data voltage.

Description

[Technical field]

[0001] The present invention relates to the field of display technology, and in particular to a compensation method for a display panel and a display device. [Background technology]

[0002] In the manufacturing process of display panels, the instability of the excimer laser annealing process will have an adverse effect on the device performance of transistors, thereby causing the brightness uniformity of the display panel to deteriorate and causing the mura phenomenon. In the prior art, the mura phenomenon can be improved by external optical compensation. However, based on the existing compensation method, the improvement effect of the mura phenomenon is not good. [Summary of the invention]

[0003] In view of this, embodiments of the present invention provide a compensation method for a display panel and a display device, which can improve the improvement effect of the mura phenomenon.

[0004] On the one hand, an embodiment of the present invention provides a compensation method for a display panel, comprising:

[0005] Acquire a first display grayscale required to be displayed by the first sub-pixel in the picture to be displayed, and acquire a first display data voltage corresponding to the first display grayscale;

[0006] Determine whether the first display data voltage is greater than a low brightness boundary voltage, and if so, obtain a first compensation data voltage corresponding to the first sub-pixel according to the first display grayscale;

[0007] According to the light-on voltage corresponding to the first sub-pixel, determine whether the first compensation data voltage is in the dark state voltage interval. If so, compensate the first sub-pixel using the light-on voltage corresponding to the first sub-pixel. If not, compensate the first sub-pixel using the first compensation data voltage.

[0008] On the other hand, an embodiment of the present invention provides a display device, including a display panel and a driver chip, wherein the driver chip includes:

[0009] A first display voltage acquisition module, used for acquiring a first display grayscale required to be displayed by the first sub-pixel in the picture to be displayed, and acquiring a first display data voltage corresponding to the first display grayscale;

[0010] A judgment module, electrically connected to the first display voltage acquisition module, for judging whether the first display data voltage is greater than a low brightness boundary voltage, and if so, issuing a first control instruction;

[0011] a compensation voltage acquisition module, electrically connected to the first display voltage acquisition module and the judgment module respectively, and configured to acquire a first compensation data voltage corresponding to the first sub-pixel according to the first display grayscale upon receiving the first control instruction;

[0012] The compensation module is electrically connected to the first display voltage acquisition module and the compensation voltage acquisition module, respectively, and is used to determine whether the first compensation data voltage is in a dark state voltage interval according to the light-on voltage corresponding to the first sub-pixel. If so, the first sub-pixel is compensated using the light-on voltage corresponding to the first sub-pixel; if not, the first sub-pixel is compensated using the first compensation data voltage.

[0013] One of the above technical solutions has the following beneficial effects:

[0014] When it is determined that the first compensation data voltage is in the dark voltage range according to the light-on voltage corresponding to the first sub-pixel, it means that the first compensation data voltage is too large. After receiving the first compensation data voltage, the pixel circuit in the first sub-pixel transmits a driving current less than the threshold current to the light-emitting element, causing the light-emitting element not to emit light, so that the first sub-pixel appears as a black spot after compensation. In this regard, when it is determined that the first compensation data voltage is in the dark voltage range, the embodiment of the present invention selects to use the light-on voltage corresponding to the first sub-pixel to compensate the first sub-pixel, so that the first sub-pixel can be slightly illuminated after compensation, and will not be completely non-luminous, thereby improving the color cast phenomenon to a certain extent.

[0015] Moreover, since the structures of the pixel circuits in different sub-pixels of the display panel are the same, the magnitude of the light-on voltage corresponding to the sub-pixel is only related to the magnitude of the threshold current of the light-emitting element, and the magnitude of the threshold current is only related to the device characteristics of the light-emitting element, that is, the light-on voltage corresponding to the sub-pixels of the same color is the same. Therefore, even if the display panel includes multiple display brightness values, for sub-pixels of the same color, the light-on voltage of the sub-pixel at multiple display brightness values ​​is unchanged.

[0016] Therefore, based on the technical solution provided in the embodiment of the present invention, when judging whether the first compensation data voltage is in the dark state voltage range according to the light-on voltage corresponding to the first sub-pixel, it is only necessary to preset several light-on voltages for sub-pixels of different colors. This greatly reduces the amount of data required to be stored while effectively improving the color cast problem after low grayscale compensation.

Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A top view of a display panel provided by an embodiment of the present invention;

[0019] Figure 2 A flow chart of a compensation method for a display panel provided by an embodiment of the present invention;

[0020] Figure 3 Another flow chart of the compensation method for a display panel provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of a test comparison between the related technology provided by the embodiment of the present invention and the embodiment of the present invention;

[0022] Figure 5 A schematic diagram of another test comparison between the related technology provided by the embodiment of the present invention and the embodiment of the present invention;

[0023] Figure 6 Another flow chart of the compensation method for a display panel provided by an embodiment of the present invention;

[0024] Figure 7 Another flow chart of the compensation method for a display panel provided by an embodiment of the present invention;

[0025] Figure 8 Another flow chart of the compensation method for a display panel provided by an embodiment of the present invention;

[0026] Fig. 9 Another flow chart of the compensation method for a display panel provided by an embodiment of the present invention;

[0027] Fig.10 Another top view of the display panel provided by the embodiment of the present invention;

[0028] Fig.11 Another flow chart of the method for driving a display panel provided by an embodiment of the present invention;

[0029] Fig.12 Another flow chart of the method for driving a display panel provided by an embodiment of the present invention;

[0030] Fig.13 Another flow chart of the method for driving a display panel provided by an embodiment of the present invention;

[0031] Fig.14 A schematic diagram of the structure of a display device provided by an embodiment of the present invention;

[0032] Fig.15 A schematic diagram of the structure of a driver chip provided by an embodiment of the present invention;

[0033] Fig.16 Another schematic diagram of the structure of the driver chip provided by the embodiment of the present invention;

[0034] Fig.17 Another schematic diagram of the structure of the driver chip provided by the embodiment of the present invention. [Specific implementation method]

[0035] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0038] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] A compensation method in the related art may specifically include:

[0040] Step K1: Take photos to obtain brightness data of each sub-pixel at multiple test grayscales.

[0041] Step K2: Calculate the compensation coefficient offset corresponding to each sub-pixel at one of the test grayscales according to the acquired brightness data. For a sub-pixel, the calculated compensation coefficient offset can be used as the compensation coefficient corresponding to the sub-pixel at 256 grayscales.

[0042] Step K3: Obtain the actual compensation value offsetReal of the compensation sub-pixel according to offsetReal=offset×Gain, G1 is the display grayscale that the compensation sub-pixel needs to display in the image to be displayed, and Gain is the correction coefficient of the compensation sub-pixel under the display grayscale. The correction coefficient Gain is a positive number greater than 0, and generally, the higher the grayscale, the smaller the corresponding correction coefficient Gain.

[0043] Step K4: Calculate the compensation grayscale G2 according to G2=G1+offsetReal, and then compensate the compensation sub-pixel using the compensation data voltage corresponding to the compensation grayscale G2.

[0044] It should be noted that in step K2, the compensation coefficient offset calculated for different sub-pixels may be different. For example, the display panel includes a bright area and a dark area, and the compensation coefficient offset of the sub-pixel in the bright area under the test grayscale may be a negative value, such as -7 levels. At this time, the actual compensation value offsetReal calculated based on the compensation coefficient offset is also less than 0, so that the sub-pixels in the area are compensated downward, so that the actual luminous brightness of the sub-pixels in the bright area is reduced and tends to the average brightness. The compensation coefficient offset of the sub-pixel in the dark area under the test grayscale may be a positive value, such as 7 levels. At this time, the actual compensation value offsetReal calculated based on the compensation coefficient offset is greater than 0, so that the sub-pixel in the area is compensated upward, so that the actual luminous brightness of the sub-pixel in the dark area is increased and tends to the average brightness, thereby achieving an improvement in the overall brightness uniformity of the display panel.

[0045] In addition, for example, for a certain red sub-pixel, the compensation coefficient offset corresponding to the red sub-pixel is -7. If the red sub-pixel needs to display grayscale 7 in the image to be displayed, and the correction coefficient Gain corresponding to grayscale 7 is 1, then the red sub-pixel actually displays a brightness of grayscale 0 (7+(-7*1)=0) after compensation. If the red sub-pixel needs to display grayscale 64 in the image to be displayed, and the correction coefficient Gain corresponding to grayscale 64 is 0.5, then the red sub-pixel actually displays a brightness of grayscale 60 (64+(-7*0.5)=60).

[0046] The inventors found in the research process that the correction coefficient Gain corresponding to the same color sub-pixel at the same grayscale is the same. When displaying low grayscale, for the sub-pixel whose compensation coefficient offset is negative and whose absolute value is large, the actual compensation value offsetReal obtained by multiplying the compensation coefficient offset of this part of the sub-pixel by the correction coefficient Gain is also negative and has a large absolute value. At this time, this part of the sub-pixel will be compensated downward to a large extent, so that this part of the sub-pixel is compensated to 0 grayscale or even below 0 grayscale, which will cause this part of the sub-pixel to directly present black spots, thereby causing color cast. For example, after compensation, the green sub-pixel may be over-compensated so that the green sub-pixel does not emit light, while the red sub-pixel is not over-compensated so that the red sub-pixel continues to emit light, thereby causing color cast.

[0047] Therefore, the existing compensation method has a poor compensation effect on low grayscale and has limited ability to optimize low grayscale visual effects.

[0048] In order to optimize the low grayscale visual effect, an embodiment of the present invention proposes a compensation method, which may specifically include:

[0049] Step H1: Obtaining the display grayscale G1 required to be displayed by the compensation sub-pixel.

[0050] Step H2: Execute the first compensation method to compensate the display grayscale G1 to obtain the pre-compensated grayscale G2.

[0051] Step H3: Determine whether the pre-compensated grayscale G2 is less than the preset critical grayscale, if yes, proceed to step H4, if no, proceed to step H5. The critical grayscale is the minimum calibration grayscale of the gamma curve, which can be set according to the actual gamma curve of the display panel or the customer's low grayscale brightness display requirements.

[0052] Step H4: Execute the second compensation method to perform secondary compensation on the pre-compensation grayscale G2 to obtain the actual compensation grayscale G3, and then compensate the compensation sub-pixel using the data voltage corresponding to the actual compensation grayscale G3.

[0053] Step H5: directly using the data voltage corresponding to the pre-compensation grayscale G2 to compensate the compensation sub-pixel.

[0054] In the above compensation method, when it is determined that the pre-compensation grayscale G2 is less than the critical grayscale, if the compensation sub-pixel is directly compensated with the pre-compensation grayscale G2, the grayscale of the compensation sub-pixel will be compensated to below the critical grayscale. Since the gamma curve is not accurately calibrated for grayscales below the critical grayscale, the compensation of the compensation sub-pixel will be inaccurate. Therefore, a second compensation can be performed to obtain the actual compensation grayscale G3, and then the compensation sub-pixel is compensated based on the actual compensation grayscale G3.

[0055] However, the inventors further discovered that although the above compensation method can improve the compensation accuracy to a certain extent, the display panel generally has multiple display brightness values ​​(Display Brightness Value, DBV), and the critical grayscales corresponding to different display brightness values ​​are different. If the critical grayscale is set for each display brightness value, the number of critical grayscales required to be set will be very large. For example, at a driving frequency of the display panel, the value of the 51 register corresponds to 4096 display brightness values, which requires setting 4096 critical grayscales. When the display panel has multiple driving frequencies such as 60Hz, 90Hz, and 120Hz, the number of critical grayscales required to be set will be doubled, resulting in an excessive amount of stored data. If only one critical grayscale is set for different display brightness values, the setting of the critical grayscale is inaccurate, which in turn leads to inaccurate compensation of low grayscales.

[0056] To this end, the embodiment of the present invention further proposes a compensation method for a display panel, such as Figure 1 and Figure 2 As shown, Figure 1 A top view of a display panel provided by an embodiment of the present invention, Figure 2 A flow chart of a compensation method for a display panel provided by an embodiment of the present invention, the compensation method may specifically include:

[0057] Step S1: obtaining a first display grayscale G1_1 required to be displayed by the first sub-pixel 1 in the picture to be displayed, and obtaining a first display data voltage V1_1 corresponding to the first display grayscale G1_1.

[0058] Step S2: Determine whether the first display data voltage V1_1 is greater than the low brightness boundary voltage V_Cut. If so, proceed to step S3.

[0059] It should be noted that the low brightness boundary voltage V_Cut corresponds to a critical grayscale, and the grayscale value of the critical grayscale is relatively small. After downward compensation, it may be compensated to 0 grayscale or below 0 grayscale. When the display panel has multiple display brightness values, the grayscale-voltage mapping relationship corresponding to different display brightness values ​​may be different. Therefore, the low brightness boundary voltage V_Cut may correspond to different critical grayscales at different display brightness values.

[0060] Step S3: obtaining a first compensation data voltage V2_1 corresponding to the first sub-pixel 1 according to the first display grayscale G1_1.

[0061] Step S4: judging whether the first compensation data voltage V2_1 is in the dark voltage interval according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1, if so, proceeding to step S5, if not, proceeding to step S6.

[0062] Step S5: compensating the first sub-pixel 1 using the lighting voltage Vd_1 corresponding to the first sub-pixel 1 .

[0063] Step S6: compensating the first sub-pixel 1 by using the first compensation data voltage V2_1.

[0064] The sub-pixels in the display panel include an electrically connected pixel circuit and a light-emitting element, and the light-emitting element emits light under the action of a driving current transmitted to it by the pixel circuit. The magnitude of the driving current transmitted by the pixel circuit to the light-emitting element is related to the data voltage received by the pixel circuit. The larger the data voltage, the smaller the driving current transmitted by the pixel circuit.

[0065] It is understandable that the light-emitting element corresponds to a threshold current, which is the critical current for light emission. The light-emitting element will emit light only when the driving current received by the light-emitting element is greater than or equal to the threshold current. The light-on voltage in the embodiment of the present invention refers to the data voltage corresponding to the threshold current.

[0066] When it is determined that the first compensation data voltage V2_1 is in the dark voltage range according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1, it means that the first compensation data voltage V2_1 is too large. After receiving the first compensation data voltage V2_1, the pixel circuit in the first sub-pixel 1 transmits a driving current less than the threshold current to the light-emitting element, causing the light-emitting element to not emit light, so that the first sub-pixel 1 presents a black spot after compensation. In this regard, when it is determined that the first compensation data voltage V2_1 is in the dark voltage range, the embodiment of the present invention compensates the first sub-pixel 1 by using the light-on voltage Vd_1 corresponding to the first sub-pixel 1, so that the first sub-pixel 1 can be slightly illuminated after compensation, and will not be completely non-luminous, thereby improving the color cast phenomenon to a certain extent.

[0067] Moreover, since the structures of the pixel circuits in different sub-pixels of the display panel are the same, the magnitude of the light-on voltage corresponding to the sub-pixel is only related to the magnitude of the threshold current of the light-emitting element, and the magnitude of the threshold current is only related to the device characteristics of the light-emitting element, that is, the light-on voltage corresponding to the sub-pixels of the same color is the same. Therefore, even if the display panel includes multiple display brightness values, for sub-pixels of the same color, the light-on voltage of the sub-pixel at multiple display brightness values ​​is unchanged.

[0068] Therefore, based on the compensation method provided in the embodiment of the present invention, when judging whether the first compensation data voltage V2_1 is in the dark state voltage range according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1, it is only necessary to preset several light-on voltages for sub-pixels of different colors. This greatly reduces the amount of data required to be stored while effectively improving the color cast problem after low grayscale compensation.

[0069] In addition, the related art mentions that the correction coefficients corresponding to the same color sub-pixels at the same grayscale are the same. If the correction coefficient at a low grayscale is set too large, it will cause color cast problems, but if the correction coefficient is set too small, it will cause under-compensation problems. For example, when a sub-pixel displays a low grayscale, for a sub-pixel with a positive compensation coefficient and a small absolute value, if the compensation coefficient is set small, the actual compensation value of this part of the sub-pixels will also be very small, so only a small degree of upward compensation can be performed on this part of the sub-pixels, resulting in under-compensation. Since the embodiment of the present invention can solve the color cast problem at low grayscale, when setting the correction coefficient at low grayscale, the value of the correction coefficient can be appropriately increased, thereby simultaneously improving the under-compensation problem at low grayscale and further optimizing the visual effect of low grayscale.

[0070] In addition, it should be noted that when judging whether the first sub-pixel 1 is to display a low grayscale in the picture to be displayed, if the first display grayscale G1_1 is directly compared with the critical grayscale, not only is it necessary to set a critical grayscale in advance according to each display brightness value, resulting in excessive storage, but also the display brightness value of the picture to be displayed needs to be additionally obtained, making the comparison process more cumbersome. However, the embodiment of the present invention compares the first display data voltage V1_1 with the low brightness boundary voltage V_Cut, converting the grayscale comparison into voltage comparison. At this time, only one low brightness boundary voltage V_Cut needs to be set, which reduces the amount of stored data and simplifies the comparison process.

[0071] In a possible implementation, combining Figure 1 ,like Figure 3 As shown, Figure 3 Another flow chart of the compensation method for the display panel provided by the embodiment of the present invention. The compensation method provided by the embodiment of the present invention further includes:

[0072] Step S1′: obtaining a second display grayscale G1_2 required to be displayed by at least one second sub-pixel 2 in the image to be displayed, and obtaining a second display data voltage V1_2 corresponding to the second display grayscale G1_2, wherein the second sub-pixel 2 has a different color from the first sub-pixel 1. Step S1′ may be performed before step S2 or after step S1.

[0073] Based on this, step S3 may specifically include:

[0074] Step S31: determine whether the second display data voltage V1_2 is greater than the lighting voltage Vd_2 corresponding to the second sub-pixel 2, if so, proceed to step S32, if not, proceed to step S33.

[0075] Step S32: obtaining a first compensation data voltage V2_1 according to the pure color correction coefficient Gain_P corresponding to the first sub-pixel 1 at the first display grayscale G1_1.

[0076] Step S33: obtaining a first compensation data voltage V2_1 according to the complex color correction coefficient Gain_M corresponding to the first sub-pixel 1 at the first display grayscale G1_1.

[0077] It should be noted that the pure color correction coefficient Gain_P can be pre-set based on the pure color picture, and the complex color correction coefficient Gain_M can be pre-set based on the complex color picture. Among them, the pure color picture refers to a picture displayed by only one color sub-pixel emitting light, and the complex color picture refers to a picture displayed by two or more sub-pixels emitting light. In an embodiment of the present invention, the color of the pure color picture is the same as the light-emitting color of the first sub-pixel 1. Exemplarily, the display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the first sub-pixel 1 is a red sub-pixel, then the above-mentioned pure color correction coefficient Gain_P is pre-set based on the red picture.

[0078] In the related art, the correction coefficients of sub-pixels are all set based on the white display screen, and then only this correction coefficient is used to compensate the sub-pixels. It can be understood that under the white display screen, sub-pixels of multiple colors all emit light to mix into white light. However, when sub-pixels of multiple colors all emit light, there will be leakage between different sub-pixels. Therefore, the correction coefficient determined based on the white display screen is debugged and set under the influence of sub-pixel leakage. However, when the display panel displays a pure color screen, only one color of sub-pixel emits light, and other color sub-pixels do not emit light. At this time, there may be no leakage between the other color sub-pixels and the emitting sub-pixels, so that the leakage effect on the emitting sub-pixels is different from the leakage effect under the white display screen. Then, if the pure color screen is compensated based on the correction coefficient determined by the white display screen, it will lead to inaccurate compensation, and the sub-pixels will be over-compensated or under-compensated. This problem is particularly obvious at low grayscale.

[0079] To this end, in an embodiment of the present invention, by judging whether the second sub-pixel 2 having a different color from the first sub-pixel 1 emits light, it can be judged whether the picture to be displayed is a pure color picture or a complex color picture. When it is judged to be a pure color picture, when the pure color correction coefficient Gain_P is called to obtain the first compensation data voltage V2_1, the first compensation data voltage V2_1 matches the pure color picture. When it is judged to be a complex color picture, when the complex color correction coefficient Gain_M is called to obtain the first compensation data voltage V2_1, the first compensation data voltage V2_1 matches the complex color picture. In this way, targeted compensation is performed on the pure color picture and the complex color picture, the compensation effect of the pure color picture and the complex color picture is improved, and the visual effect of the display panel at low grayscale is optimized.

[0080] In this regard, the present invention also performs compensation tests on the display panel based on the compensation methods of the related art and the compensation methods provided by the embodiments of the present invention, and calculates the brightness uniformity of the display panel by measuring the brightness of 17 points. Figure 4 and Figure 5 As shown, Figure 4 A schematic diagram of a test comparison between the related technology provided by the embodiment of the present invention and the embodiment of the present invention, Figure 5 A schematic diagram of another test comparison between the related technology provided by the embodiment of the present invention and the embodiment of the present invention, wherein: Figure 4 Line A in the figure represents the target brightness, line B represents the brightness of the embodiment of the present invention, and line C represents the brightness of the related art. The test found that after the display panel is compensated by the compensation method in the related art, the brightness uniformity of the display panel is only 79%, while after the compensation method provided by the embodiment of the present invention is used to compensate the pure color picture and the complex color picture in a targeted manner, the brightness uniformity of the display panel can be increased to more than 90%. The display panel in the embodiment of the present invention has a better visual effect at low grayscale.

[0081] In a possible implementation, Figure 6 As shown, Figure 6 This is another flow chart of the compensation method for the display panel provided in an embodiment of the present invention, and step S32 may specifically include: calculating the pure color correction compensation value OffsetNow_P corresponding to the first sub-pixel 1 according to OffsetNow_P=offset_1×Gain_P, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_P is the pure color correction coefficient Gain_P corresponding to the first sub-pixel 1 at the first display grayscale G1_1; calculating the first compensation grayscale G2_1 according to G2_1=OffsetNow_P+G1_1, wherein G1_1 is the first display grayscale G1_1, and setting the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0082] When it is determined that the image to be displayed is a pure color image, the first compensation grayscale can be obtained by calculating the pure color correction compensation value OffsetNow_P, so that the first compensation data voltage V2_1 further obtained is the first compensation data voltage V2_1 that matches the pure color image. If the first compensation data voltage V2_1 is subsequently used for compensation, the compensation effect on the pure color image can be optimized.

[0083] In one possible implementation, see again Figure 6, step S33 may specifically include: calculating the complex color correction compensation value OffsetNow_M corresponding to the first sub-pixel 1 according to OffsetNow_M=offset_1×Gain_M, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_M is the complex color correction coefficient Gain_M corresponding to the first sub-pixel 1 at the first display grayscale G1_1; calculating the first compensation grayscale G2_1 according to G2_1=OffsetNow_M+G1_1, wherein G1_1 is the first display grayscale G1_1, and setting the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0084] When it is determined that the image to be displayed is a complex-color image, the first compensation grayscale can be obtained by calculating the complex-color correction compensation value OffsetNow_M, so that the first compensation data voltage V2_1 further obtained is the first compensation data voltage V2_1 that matches the complex-color image. If the first compensation data voltage V2_1 is subsequently used for compensation, the compensation effect on the complex-color image can be optimized.

[0085] In a possible implementation, combining Figure 1 The display panel includes a first color sub-pixel 11, a second color sub-pixel 21 and a third color sub-pixel 22, wherein the first sub-pixel 1 is the first color sub-pixel 11, and the second sub-pixel 2 includes the second color sub-pixel 21 and the third color sub-pixel 22.

[0086] like Figure 7 As shown, Figure 7 Another flow chart of the compensation method of the display panel provided in an embodiment of the present invention, step S1′ may specifically include: obtaining the second A display grayscale G1_21 required to be displayed by the second color sub-pixel 21 in the picture to be displayed, and obtaining the second A display data voltage V1_21 corresponding to the second A display grayscale G1_21, and obtaining the second B display grayscale G1_22 required to be displayed by the third color sub-pixel 22 in the picture to be displayed, and obtaining the second B display data voltage V2_d1 corresponding to the second B display grayscale G1_22.

[0087] Based on this, step S31 may specifically include: determining whether the first condition is met, the first condition being: the second A display data voltage V1_21 is greater than the light-on voltage V2_d1 corresponding to the second color sub-pixel 21, and at the same time, the second B display data voltage V2_d1 is greater than the light-on voltage V2_d2 corresponding to the third color sub-pixel 22.

[0088] When the second sub-pixel 2 includes a second color sub-pixel 21 and a third color sub-pixel 22, when judging whether the display data voltage of the second sub-pixel 2 is greater than the light-up voltage Vd_2 corresponding to the second sub-pixel 2, the luminescence conditions of both the second color sub-pixel 21 and the third color sub-pixel 22 can be judged, so as to more accurately identify whether the image to be displayed is a pure color image of the first color.

[0089] Further, see again Figure 7 When it is determined that the first condition is not met, step S33 may specifically include:

[0090] Step S331: Determine whether the second condition is met, the second condition is: the second A display data voltage V1_21 is less than the light-on voltage V2_d1 corresponding to the second color sub-pixel 21, and at the same time, the second B display data voltage V2_d1 is less than the light-on voltage V2_d2 corresponding to the third color sub-pixel 22; if so, go to step S332, if not, go to step S333.

[0091] Step S332: Obtaining a first compensation data voltage V2_1 according to the white correction coefficient Gain_M1 corresponding to the first sub-pixel 1 at the first display grayscale G1_1.

[0092] Step S333 : obtaining a first compensation data voltage V2_1 according to the non-white correction coefficient Gain_M2 corresponding to the first sub-pixel 1 at the first display grayscale G1_1 .

[0093] It should be noted that the white correction coefficient Gain_M1 can be pre-set based on a white complex color picture, and the non-white correction coefficient Gain_M2 can be pre-set based on a non-white complex color picture. A white complex color picture refers to a picture displayed when all three color sub-pixels emit light, and a non-white complex color picture refers to a picture displayed when only two color sub-pixels emit light.

[0094] When it is determined that the second color sub-pixel 21 and the third color sub-pixel 22 are both emitting light, there is leakage current between the first color sub-pixel 11 and the adjacent second color sub-pixel 21 and third color sub-pixel 22. This situation is more suitable for the white correction coefficient Gain_M1 obtained based on the white complex color image. At this time, the white correction coefficient Gain_M1 is called to obtain the first compensation data voltage V2_1, and the first compensation data voltage V2_1 is more matched with the image to be displayed.

[0095] When it is determined that only one of the second color sub-pixel 21 and the third color sub-pixel 22 emits light, there is a difference in the sub-pixel leakage current under the non-white complex color picture and the white complex color picture, so the white correction coefficient Gain_M1 obtained based on the white complex color picture is no longer applicable. At this time, the first compensation data voltage V2_1 is obtained by calling the non-white correction coefficient Gain_M2, and the first compensation data voltage V2_1 is more matched with the non-white complex color picture to be displayed, so that the visual effect of the picture to be displayed can be optimized.

[0096] Furthermore, if Figure 8 As shown, Figure 8 This is another flow chart of the compensation method for the display panel provided in an embodiment of the present invention, and step S332 may specifically include: calculating the white correction compensation value OffsetNow_M1 corresponding to the first sub-pixel 1 according to OffsetNow_M1=offset_1×Gain_M1, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_M1 is the white correction coefficient Gain_M1 corresponding to the first sub-pixel 1 at the first display grayscale G1_1; calculating the first compensation grayscale G2_1 according to G2_1=OffsetNow_M1+G1_1, wherein G1_1 is the first display grayscale G1_1, and setting the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0097] When it is determined that the image to be displayed is a white complex-color image, the first compensation grayscale can be obtained by calculating the white correction compensation value, so that the first compensation data voltage V2_1 further obtained is the first compensation data voltage V2_1 that matches the white complex-color image. If the first compensation data voltage V2_1 is subsequently used for compensation, the compensation effect on the white complex-color image can be optimized.

[0098] Further, see again Figure 8 , step S333 may specifically include: calculating the non-white correction compensation value OffsetNow_M2 corresponding to the first sub-pixel 1 according to OffsetNow_M2=offset_1×Gain_M2, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_M2 is the non-white correction coefficient Gain_M2; calculating the first compensation grayscale G2_1 according to G2_1=OffsetNow_M2+G1_1, wherein G1_1 is the first display grayscale G1_1, and setting the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0099] When it is determined that the image to be displayed is a non-white complex color image, the first compensation grayscale can be obtained by calculating the non-white correction compensation value, so that the first compensation data voltage V2_1 further obtained is the first compensation data voltage V2_1 that matches the non-white complex color image. If the first compensation data voltage V2_1 is subsequently used for compensation, the compensation effect on the non-white complex color image can be optimized.

[0100] In a possible implementation, Fig. 9 As shown, Fig. 9 This is another flow chart of the compensation method for the display panel provided by the embodiment of the present invention. Step S333 may specifically include:

[0101] Step S3331: Determine whether the third condition is met, the third condition is: the second A display data voltage V1_21 is less than the light-on voltage V2_d1 corresponding to the second color sub-pixel 21, and at the same time, the second B display data voltage V2_d1 is greater than the light-on voltage V2_d2 corresponding to the third color sub-pixel 22; if so, go to step S3332, if not, go to step S3333.

[0102] Step S3332: Calculate the first non-white correction compensation value OffsetNow_M21 corresponding to the first sub-pixel 1 according to OffsetNow_M21=offset_1×Gain_M21, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_M21 is the first non-white correction coefficient Gain_M2 corresponding to the first sub-pixel 1 at the first display grayscale G1_1; calculate the first compensation grayscale G2_1 according to G2_1=OffsetNow_M21+G1_1, wherein G1_1 is the first display grayscale G1_1, and set the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0103] Step S3333: Calculate the second non-white correction compensation value OffsetNow_M22 corresponding to the first sub-pixel 1 according to OffsetNow_M22=offset_1×Gain_M22, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel 1 at the first display grayscale G1_1, and Gain_M22 is the second non-white correction coefficient Gain_M2 corresponding to the first sub-pixel 1 at the first display grayscale G1_1; calculate the first compensation grayscale G2_1 according to G2_1=OffsetNow_M22+G1_1, wherein G1_1 is the first display grayscale G1_1, and set the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage V2_1.

[0104] The first non-white correction coefficient Gain_M21 can be pre-set based on the first non-white complex color picture, and the second non-white correction coefficient Gain_M22 can be pre-set based on the second non-white complex color picture. When the display panel displays the first non-white complex color picture, the first color sub-pixel 11 and the second color sub-pixel 21 emit light, and the third color sub-pixel 22 does not emit light. When the display panel displays the second non-white complex color picture, the first color sub-pixel 11 and the third color sub-pixel 22 emit light, and the second color sub-pixel 21 does not emit light.

[0105] In the first non-white complex color picture and the second non-white complex color picture, since the two color sub-pixels that emit light are different, there will be differences in the leakage current between adjacent sub-pixels. Therefore, when the embodiment of the present invention determines that the picture to be displayed is a white complex color picture, it further determines whether it is the first non-white complex color picture or the second non-white complex color picture, and then selects the first non-white correction coefficient Gain_M21 or the second non-white correction coefficient Gain_M22 to obtain the first compensation data voltage V2_1. The first compensation data voltage V2_1 is more matched with the non-white complex color picture actually displayed, and the compensation is more accurate.

[0106] It should be noted that in step S5, when the first sub-pixel 1 is compensated by using the light-on voltage Vd_1 corresponding to the first sub-pixel 1, the grayscale corresponding to the light-on voltage in the picture is the light-on grayscale G1_d according to the grayscale-voltage mapping, and the final actual compensation value offsetReal is G1_d-G1_1. When the first sub-pixel 1 is compensated by using the first compensation data voltage V2_1V2_1, the final actual compensation value offsetReal is the same as the pure color correction compensation value OffsetNow_P corresponding to the first sub-pixel 1 finally determined in step S32, or the same as the complex color correction compensation value OffsetNow_M corresponding to the first sub-pixel 1 finally determined in step S33.

[0107] In a possible implementation, Fig.10 and Fig.11 As shown, Fig.10 Another top view of a display panel provided by an embodiment of the present invention, Fig.11 Another flow chart of a method for driving a display panel provided by an embodiment of the present invention, the driving method further includes:

[0108] Step S0: dividing the display area 3 of the display panel into a plurality of partitions 4.

[0109] Step S1 ′ may specifically include: obtaining a second display grayscale G1_2 required to be displayed by at least one second subpixel 2 located in the same partition 4 as the first subpixel 1 in the image to be displayed, and obtaining a second display data voltage V1_2 corresponding to the second display grayscale G1_2.

[0110] In the above driving mode, the second display data voltage V1_2 of the second sub-pixel 2 located in the same partition 4 as the first sub-pixel 1 is obtained. Therefore, when judging the pure color picture and the complex color picture, the state of the image displayed in this partition 4 is judged. At this time, the display panel can be compensated for the partition 4 domain, and the compensation is more accurate. For example, when the picture displayed by a certain partition 4 is a pure color picture, and the picture displayed by another partition 4 is a complex color picture, the first sub-pixels 1 in the two partitions 4 can be differentially compensated, thereby optimizing the compensation effect.

[0111] In a possible implementation, combining Fig.10 ,like Fig.12 As shown, Fig.12 Another flow chart of a method for driving a display panel provided by an embodiment of the present invention, the driving method further includes:

[0112] Step S0: dividing the display area 3 of the display panel into a plurality of partitions 4.

[0113] Step S1″: obtaining a third display grayscale to be displayed by a third sub-pixel 6 located in the same sub-area 4 as the first sub-pixel 1 in the image to be displayed, wherein the third sub-pixel 6 has the same color as the first sub-pixel 1 .

[0114] When it is determined that the second display data voltage V1_2 is greater than the lighting voltage Vd_2 corresponding to the second sub-pixel 2 , the compensation method further includes: step S7 : obtaining the second compensation data voltage V2_2 according to the pure color correction coefficient Gain_P corresponding to the third sub-pixel 6 at the third display grayscale.

[0115] When it is determined that the second display data voltage V1_2 is less than or equal to the lighting voltage Vd_2 corresponding to the second sub-pixel 2, the compensation method further includes: step S8: obtaining the second compensation data voltage V2_2 according to the complex color correction coefficient Gain_M corresponding to the third sub-pixel 6 at the third display grayscale.

[0116] The driving method also includes:

[0117] Step S9: judging whether the second compensation data voltage V2_2 is in the dark state voltage interval according to the light-on voltage V3_d corresponding to the third sub-pixel 6, if so, proceeding to step S10, if not, proceeding to step S11.

[0118] Step S10: compensating the third sub-pixel 6 using the lighting voltage V3_d corresponding to the third sub-pixel 6.

[0119] Step S11: compensating the third sub-pixel 6 using the second compensation data voltage V2_2.

[0120] After determining whether the partition 4 where the first sub-pixel 1 is located is displaying a pure color image or a complex color image based on the second display data voltage V1_2 of the second sub-pixel 2, for the third sub-pixel 6 which is located in the same partition 4 as the first sub-pixel 1 and has the same color as the first sub-pixel 1, the pure color correction coefficient Gain_P or the complex color correction coefficient Gain_M corresponding to the third sub-pixel 6 can be directly called according to the determined pure color image or complex color image to obtain the second compensation data voltage V2_2 of the third sub-pixel 6, thereby eliminating the need to determine which type of correction coefficient to select for the third sub-pixel 6 separately, thereby saving compensation time.

[0121] In a feasible implementation, step S1 ′ may specifically include: obtaining a second display grayscale G1_2 required to be displayed by at least one second subpixel 2 adjacent to the first subpixel 1 in the image to be displayed, and obtaining a second display data voltage V1_2 corresponding to the second display grayscale G1_2.

[0122] When the second sub-pixel 2 is adjacent to the first sub-pixel 1, when the second sub-pixel 2 emits light, the leakage current between the second sub-pixel 2 and the first sub-pixel 1 is more significant. Therefore, by judging whether the second sub-pixel 2 emits light, a more accurate judgment can be made on whether the first sub-pixel 1 is affected by the leakage current, and then, based on whether the second sub-pixel 2 emits light, it can be identified whether the image to be displayed is a pure color image or a complex color image, and the first sub-pixel 1 can be compensated more accurately.

[0123] In a feasible implementation, the process of determining whether the first compensation data voltage V2_1 is in the dark state voltage range according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1 in step S4 may specifically include: determining whether the first compensation data voltage V2_1 is greater than the light-on voltage Vd_1 corresponding to the first sub-pixel 1; or, determining whether the difference between the first compensation data voltage V2_1 and the first display data voltage V1_1 is greater than the difference between the light-on voltage Vd_1 corresponding to the first sub-pixel 1 and the low-brightness boundary voltage V_Cut.

[0124] Both of the above methods can accurately determine whether the first compensation data voltage V2_1 is in the dark voltage range, so that the first sub-pixel 1 can be accurately compensated based on the first compensation data voltage V2_1 or the light-on voltage Vd_1 corresponding to the first sub-pixel 1.

[0125] In a possible implementation, Fig.13 As shown, Fig.13 Another flow chart of the driving method of the display panel provided by the embodiment of the present invention, when it is determined that the first display data voltage V1_1 is less than or equal to the low brightness boundary voltage V_Cut, the compensation method further includes:

[0126] Step S20 : ​​obtaining a third compensation data voltage V2_3 according to the white correction coefficient Gain_M1 corresponding to the first sub-pixel 1 at the first display grayscale G1_1 , and compensating the first sub-pixel 1 using the third compensation data voltage V2_3 .

[0127] When the first display data voltage V1_1 is less than the low-brightness boundary voltage V_Cut, the grayscale value of the first display grayscale G1_1 is relatively large, and the first sub-pixel 1 is displayed at a high grayscale. On the one hand, the first sub-pixel 1 is not prone to color cast problems after compensation. On the other hand, the difference in the compensation effect of the high grayscale is not obvious when switching between the pure color picture and the complex color picture. Therefore, when it is determined that the first sub-pixel 1 is displayed at a high grayscale, the third compensation data voltage V2_3 can be directly obtained based on the white correction coefficient Gain_M1, and then the first sub-pixel 1 can be compensated using the third compensation data voltage V2_3.

[0128] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Figure 1 and Figure 2 ,like Fig.14 and Fig.15 As shown, Fig.14 A schematic diagram of the structure of a display device provided by an embodiment of the present invention is shown in FIG. Fig.15 The present invention provides a schematic diagram of a driving chip 200 according to an embodiment of the present invention. The display device includes a display panel 100 and a driving chip 200. The driving chip 200 includes a first display voltage acquisition module 201, a judgment module 202, a compensation voltage acquisition module 203 and a compensation module 204.

[0129] The first display voltage acquisition module 201 is used to acquire the first display grayscale G1_1 required to be displayed by the first sub-pixel 1 in the picture to be displayed, and to acquire the first display data voltage V1_1 corresponding to the first display grayscale G1_1.

[0130] The determination module 202 is electrically connected to the first display voltage acquisition module 201 and is used to determine whether the first display data voltage V1_1 is greater than the low brightness boundary voltage V_Cut. If so, a first control instruction is issued.

[0131] The compensation voltage acquisition module 203 is electrically connected to the first display voltage acquisition module 201 and the determination module 202 respectively, and is used to acquire the first compensation data voltage V2_1 corresponding to the first sub-pixel 1 according to the first display gray scale G1_1 when receiving the first control instruction.

[0132] The compensation module 204 is electrically connected to the first display voltage acquisition module 201 and the compensation voltage acquisition module 203 respectively, and is used to determine whether the first compensation data voltage V2_1 is in the dark state voltage interval according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1. If so, the first sub-pixel 1 is compensated using the light-on voltage Vd_1 corresponding to the first sub-pixel 1; if not, the first sub-pixel 1 is compensated using the first compensation data voltage V2_1.

[0133] In an embodiment of the present invention, when the compensation module 204 determines that the first compensation data voltage V2_1 is in the dark state voltage range based on the light-on voltage Vd_1 corresponding to the first sub-pixel 1, it provides the option of using the light-on voltage Vd_1 corresponding to the first sub-pixel 1 to compensate the first sub-pixel 1, so that the first sub-pixel 1 is slightly bright after compensation and will not be completely non-luminous, thereby improving the color cast phenomenon to a certain extent.

[0134] Moreover, the magnitude of the light-on voltage corresponding to the sub-pixel is only related to the magnitude of the threshold current of the light-emitting element, so the light-on voltages corresponding to the sub-pixels of the same color are the same. Therefore, when the compensation module 204 determines whether the first compensation data voltage V2_1 is in the dark voltage interval according to the light-on voltage Vd_1 corresponding to the first sub-pixel 1, it only needs to preset several light-on voltages for sub-pixels of different colors, which greatly reduces the amount of data required to be stored while effectively improving the color cast problem after low grayscale compensation.

[0135] In a possible implementation, Fig.16 As shown, Fig.16 Another structural schematic diagram of the driver chip 200 provided in an embodiment of the present invention, the driver chip 200 also includes a second display voltage acquisition module 205, the second display voltage acquisition module 205 is used to obtain a second display grayscale G1_2 required to be displayed by at least one second sub-pixel 2 in the picture to be displayed, and obtain a second display data voltage V1_2 corresponding to the second display grayscale G1_2, wherein the second sub-pixel 2 has a different color from the first sub-pixel 1.

[0136] The compensation voltage acquisition module 203 includes a first judgment submodule 2031 and a first acquisition submodule 2032. The first judgment submodule 2031 is electrically connected to the judgment module 202 and the second display voltage acquisition module 205, respectively, and is used to judge whether the second display data voltage V1_2 is greater than the lighting voltage Vd_2 corresponding to the second sub-pixel 2 when receiving the first control instruction, and if so, issue a pure color compensation instruction, and if not, issue a complex color compensation instruction. The first acquisition submodule 2032 is electrically connected to the first judgment submodule 2031, the first display voltage acquisition module 201 and the compensation module 204, respectively, and is used to obtain the first compensation data voltage V2_1 according to the pure color correction coefficient Gain_P corresponding to the first sub-pixel 1 at the first display grayscale G1_1 when receiving the pure color compensation instruction, and to obtain the first compensation data voltage V2_1 according to the complex color correction coefficient Gain_M corresponding to the first sub-pixel 1 at the first display grayscale G1_1 when receiving the complex color compensation instruction.

[0137] Furthermore, combined with Figure 1 ,like Fig.17 As shown, Fig.17 Another structural schematic diagram of the driving chip 200 provided in an embodiment of the present invention, the display panel 100 includes a first color sub-pixel 11, a second color sub-pixel 21 and a third color sub-pixel 22, wherein the first sub-pixel 1 is the first color sub-pixel 11, and the second sub-pixel 2 includes the second color sub-pixel 21 and the third color sub-pixel 22.

[0138] The second display voltage acquisition module 205 is used to obtain the second A display grayscale G1_21 required to be displayed by the second color sub-pixel 21 in the image to be displayed, and obtain the second A display data voltage V1_21 corresponding to the second A display grayscale G1_21, and obtain the second B display grayscale G1_22 required to be displayed by the third color sub-pixel 22 in the image to be displayed, and obtain the second B display data voltage V2_d1 corresponding to the second B display grayscale G1_22.

[0139] The first judgment submodule 2031 is used to: upon receiving the first control instruction, judge whether the first condition is met, the first condition being: the second A display data voltage V1_21 is greater than the light-on voltage V2_d1 corresponding to the second color sub-pixel 21, and at the same time, the second B display data voltage V2_d1 is greater than the light-on voltage V2_d2 corresponding to the third color sub-pixel 22; if so, issue a pure color compensation instruction; if not, judge whether the second condition is met, the second condition being: the second A display data voltage V1_21 is less than the light-on voltage V2_d1 corresponding to the second color sub-pixel 21, and at the same time, the second B display data voltage V2_d1 is less than the light-on voltage V2_d2 corresponding to the third color sub-pixel 22; if so, issue a white compensation instruction, and if not, issue a non-white compensation instruction;

[0140] The first acquisition submodule 2032 includes a first unit 20321 , a second unit 20322 and a third unit 20323 .

[0141] Among them, the first unit 20321 is electrically connected to the first judgment submodule 2031, the first display voltage acquisition module 201 and the compensation module 204 respectively, and is used to obtain the first compensation data voltage V2_1 according to the pure color correction coefficient Gain_P corresponding to the first subpixel 1 at the first display grayscale G1_1 when receiving the pure color compensation instruction.

[0142] The second unit 20322 is electrically connected to the first judgment submodule 2031, the first display voltage acquisition module 201 and the compensation module 204 respectively, and is used to obtain the first compensation data voltage V2_1 according to the white correction coefficient Gain_M1 corresponding to the first subpixel 1 at the first display grayscale G1_1 when receiving the white compensation instruction.

[0143] The third unit 20323 is electrically connected to the first judgment submodule 2031, the first display voltage acquisition module 201 and the compensation module 204 respectively, and is used to obtain the first compensation data voltage V2_1 according to the non-white correction coefficient Gain_M2 corresponding to the first sub-pixel 1 at the first display grayscale G1_1 when receiving the non-white compensation instruction.

[0144] When the second sub-pixel 2 includes a second color sub-pixel 21 and a third color sub-pixel 22, when judging whether the display data voltage of the second sub-pixel 2 is greater than the light-up voltage Vd_2 corresponding to the second sub-pixel 2, the luminescence conditions of both the second color sub-pixel 21 and the third color sub-pixel 22 can be judged, so as to more accurately identify whether the image to be displayed is a pure color image of the first color.

[0145] Moreover, when it is determined that the second color sub-pixel 21 and the third color sub-pixel 22 are both emitting light, there is leakage current between the first color sub-pixel 11 and the adjacent second color sub-pixel 21 and third color sub-pixel 22. This situation is more suitable for the white correction coefficient Gain_M1 obtained based on the white complex color image. At this time, the white correction coefficient Gain_M1 is called to obtain the first compensation data voltage V2_1, and the first compensation data voltage V2_1 is more matched with the image to be displayed.

[0146] When it is determined that only one of the second color sub-pixel 21 and the third color sub-pixel 22 emits light, there is a difference in the sub-pixel leakage current under the non-white complex color picture and the white complex color picture, so the white correction coefficient Gain_M1 obtained based on the white complex color picture is no longer applicable. At this time, the first compensation data voltage V2_1 is obtained by calling the non-white correction coefficient Gain_M2, and the first compensation data voltage V2_1 is more matched with the non-white complex color picture to be displayed, so that the visual effect of the picture to be displayed can be optimized.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compensation method for a display panel, characterized in that: include: Obtaining a first display grayscale required to be displayed by the first sub-pixel in the picture to be displayed, and obtaining a first display data voltage corresponding to the first display grayscale; wherein the first display grayscale is positively correlated with the display brightness; and the first display data voltage is negatively correlated with the first display grayscale; Determine whether the first display data voltage is greater than a low brightness boundary voltage, and if so, obtain a first compensation data voltage corresponding to the first sub-pixel according to the first display grayscale; wherein the low brightness boundary voltage corresponds to a critical grayscale; According to the light-on voltage corresponding to the first sub-pixel, determine whether the first compensation data voltage is in a dark voltage interval, and if so, compensate the first sub-pixel using the light-on voltage corresponding to the first sub-pixel; if not, compensate the first sub-pixel using the first compensation data voltage; The step of judging whether the first compensation data voltage is in a dark voltage interval according to the light-on voltage corresponding to the first sub-pixel includes judging whether the first compensation data voltage is greater than the light-on voltage corresponding to the first sub-pixel.

2. The compensation method according to claim 1, characterized in that: The compensation method further includes: obtaining a second display grayscale required to be displayed by at least one second sub-pixel in the to-be-displayed picture, and obtaining a second display data voltage corresponding to the second display grayscale, wherein the second sub-pixel has a different color from the first sub-pixel; The process of acquiring the first compensation data voltage corresponding to the first sub-pixel according to the first display gray scale includes: Determine whether the second display data voltage is greater than the lighting voltage corresponding to the second sub-pixel. If so, obtain the first compensation data voltage according to the pure color correction coefficient corresponding to the first sub-pixel at the first display grayscale. If not, obtain the first compensation data voltage according to the complex color correction coefficient corresponding to the first sub-pixel at the first display grayscale.

3. The compensation method according to claim 2, characterized in that: The process of obtaining the first compensation data voltage according to the pure color correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: The pure color correction compensation value OffsetNow_P corresponding to the first sub-pixel is calculated according to OffsetNow_P=offset_1×Gain_P, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_P is the pure color correction coefficient corresponding to the first sub-pixel at the first display grayscale; The first compensation grayscale G2_1 is calculated according to G2_1=OffsetNow_P+G1_1, wherein G1_1 is the first display grayscale, and the data voltage corresponding to the calculated first compensation grayscale is set as the first compensation data voltage.

4. The compensation method according to claim 2, characterized in that: The process of obtaining the first compensation data voltage according to the complex color correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: Calculate the complex color correction compensation value OffsetNow_M corresponding to the first sub-pixel according to OffsetNow_M=offset_1×Gain_M, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_M is the complex color correction coefficient corresponding to the first sub-pixel at the first display grayscale; The first compensation grayscale G2_1 is calculated according to G2_1=OffsetNow_M+G1_1, wherein G1_1 is the first display grayscale, and the data voltage corresponding to the calculated first compensation grayscale is set as the first compensation data voltage.

5. The compensation method according to claim 2, characterized in that: The display panel includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, wherein the first sub-pixel is the first color sub-pixel, and the second sub-pixel includes the second color sub-pixel and the third color sub-pixel; The process of obtaining a second display grayscale required to be displayed by at least one second sub-pixel in the picture to be displayed, and obtaining a second display data voltage corresponding to the second display grayscale includes: Acquire a second A display grayscale required to be displayed by the second color sub-pixel in the to-be-displayed picture, and acquire a second A display data voltage corresponding to the second A display grayscale; Acquire a second B display grayscale required to be displayed by the third color sub-pixel in the to-be-displayed picture, and acquire a second B display data voltage corresponding to the second B display grayscale; The process of determining whether the second display data voltage is greater than the light-on voltage corresponding to the second sub-pixel includes: determining whether a first condition is met, wherein the first condition is: the second A display data voltage is greater than the light-on voltage corresponding to the second color sub-pixel, and at the same time, the second B display data voltage is greater than the light-on voltage corresponding to the third color sub-pixel.

6. The compensation method according to claim 5, characterized in that: When it is determined that the first condition is not met, the process of obtaining the first compensation data voltage according to the complex color correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: Determine whether the second condition is met, the second condition being: the second A display data voltage is less than the light-on voltage corresponding to the second color sub-pixel, and at the same time, the second B display data voltage is less than the light-on voltage corresponding to the third color sub-pixel; if so, obtain the first compensation data voltage according to the white correction coefficient corresponding to the first sub-pixel at the first display grayscale; if not, obtain the first compensation data voltage according to the non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale.

7. The compensation method according to claim 6, characterized in that: The process of obtaining the first compensation data voltage according to the white correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: Calculate the white correction compensation value OffsetNow_M1 corresponding to the first sub-pixel according to OffsetNow_M1=offset_1×Gain_M1, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_M1 is the white correction coefficient corresponding to the first sub-pixel at the first display grayscale; The first compensation grayscale G2_1 is calculated according to G2_1=OffsetNow_M1+G1_1, wherein G1_1 is the first display grayscale, and the data voltage corresponding to the calculated first compensation grayscale is set as the first compensation data voltage.

8. The compensation method according to claim 6, characterized in that: The process of obtaining the first compensation data voltage according to the non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: Calculate the non-white correction compensation value OffsetNow_M2 corresponding to the first sub-pixel according to OffsetNow_M2=offset_1×Gain_M2, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_M2 is the non-white correction coefficient; The first compensation grayscale G2_1 is calculated according to G2_1=OffsetNow_M2+G1_1, wherein G1_1 is the first display grayscale, and the data voltage corresponding to the calculated first compensation grayscale is set as the first compensation data voltage.

9. The compensation method according to claim 6, characterized in that: The process of obtaining the first compensation data voltage according to the non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale includes: Determine whether a third condition is met, wherein the third condition is: the second A display data voltage is less than a light-on voltage corresponding to the second color sub-pixel, and at the same time, the second B display data voltage is greater than a light-on voltage corresponding to the third color sub-pixel; If so, the first non-white correction compensation value OffsetNow_M21 corresponding to the first sub-pixel is calculated according to OffsetNow_M21=offset_1×Gain_M21, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_M21 is the first non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale; the first compensation grayscale G2_1 is calculated according to G2_1= OffsetNow_M21+G1_1, wherein G1_1 is the first display grayscale, and the data voltage corresponding to the calculated first compensation grayscale is set as the first compensation data voltage; If not, calculate the second non-white correction compensation value OffsetNow_M22 corresponding to the first sub-pixel according to OffsetNow_M22=offset_1×Gain_M22, wherein offset_1 is the compensation coefficient corresponding to the first sub-pixel at the first display grayscale, and Gain_M22 is the second non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale; calculate the first compensation grayscale G2_1 according to G2_1=OffsetNow_M22+G1_1, wherein G1_1 is the first display grayscale, and set the data voltage corresponding to the calculated first compensation grayscale as the first compensation data voltage.

10. The compensation method according to claim 2, characterized in that: The compensation method further includes: dividing a display area of ​​the display panel into a plurality of partitions; The process of obtaining a second display grayscale required to be displayed by at least one second sub-pixel in the picture to be displayed, and obtaining a second display data voltage corresponding to the second display grayscale includes: obtaining a second display grayscale required to be displayed by at least one second sub-pixel located in the same partition as the first sub-pixel in the picture to be displayed, and obtaining a second display data voltage corresponding to the second display grayscale.

11. The compensation method according to claim 2, characterized in that: The compensation method further comprises: Dividing the display area of ​​the display panel into a plurality of partitions; Acquire a third display grayscale that is required to be displayed by a third sub-pixel located in the same sub-area as the first sub-pixel in the picture to be displayed, wherein the third sub-pixel has the same color as the first sub-pixel; When it is determined that the second display data voltage is greater than the lighting voltage corresponding to the second sub-pixel, the compensation method further includes: obtaining a second compensation data voltage according to a pure color correction coefficient corresponding to the third sub-pixel at the third display grayscale; When it is determined that the second display data voltage is less than or equal to the lighting voltage corresponding to the second sub-pixel, the compensation method further includes: obtaining a second compensation data voltage according to a complex color correction coefficient corresponding to the third sub-pixel at the third display grayscale; The compensation method also includes: judging whether the second compensation data voltage is in a dark state voltage interval according to the light-on voltage corresponding to the third sub-pixel, and if so, compensating the third sub-pixel using the light-on voltage corresponding to the third sub-pixel; if not, compensating the third sub-pixel using the second compensation data voltage.

12. The compensation method according to claim 2, characterized in that: The process of obtaining a second display grayscale required to be displayed by at least one second sub-pixel in the picture to be displayed, and obtaining a second display data voltage corresponding to the second display grayscale includes: A second display grayscale required to be displayed by at least one of the second subpixels adjacent to the first subpixel in the to-be-displayed picture is obtained, and a second display data voltage corresponding to the second display grayscale is obtained.

13. The compensation method according to claim 1, characterized in that: The process of judging whether the first compensation data voltage is in a dark state voltage interval according to the lighting voltage corresponding to the first sub-pixel includes: Determine whether the first compensation data voltage is greater than the light-on voltage corresponding to the first sub-pixel; or, determine whether the difference between the first compensation data voltage and the first display data voltage is greater than the difference between the light-on voltage corresponding to the first sub-pixel and the low-brightness boundary voltage.

14. The compensation method according to claim 1, characterized in that: When it is determined that the first display data voltage is less than or equal to the low brightness boundary voltage, the compensation method further includes: A third compensation data voltage is obtained according to the white correction coefficient corresponding to the first sub-pixel at the first display grayscale, and the first sub-pixel is compensated by using the third compensation data voltage.

15. A display device, characterized in that: The device comprises a display panel and a driver chip, wherein the driver chip comprises: A first display voltage acquisition module, used for acquiring a first display grayscale required to be displayed by the first sub-pixel in the picture to be displayed, and acquiring a first display data voltage corresponding to the first display grayscale; wherein the first display grayscale is positively correlated with the display brightness; and the first display data voltage is negatively correlated with the first display grayscale; A judgment module, electrically connected to the first display voltage acquisition module, for judging whether the first display data voltage is greater than a low brightness boundary voltage, and if so, issuing a first control instruction; wherein the low brightness boundary voltage corresponds to a critical gray scale; a compensation voltage acquisition module, electrically connected to the first display voltage acquisition module and the judgment module respectively, and configured to acquire a first compensation data voltage corresponding to the first sub-pixel according to the first display grayscale upon receiving the first control instruction; The compensation module is electrically connected to the first display voltage acquisition module and the compensation voltage acquisition module, respectively, and is used to determine whether the first compensation data voltage is in a dark state voltage interval according to the light-on voltage corresponding to the first sub-pixel, and if so, compensate the first sub-pixel using the light-on voltage corresponding to the first sub-pixel; if not, compensate the first sub-pixel using the first compensation data voltage; wherein, determining whether the first compensation data voltage is in a dark state voltage interval according to the light-on voltage corresponding to the first sub-pixel includes: determining whether the first compensation data voltage is greater than the light-on voltage corresponding to the first sub-pixel.

16. The display device according to claim 15, characterized in that: The driving chip further includes a second display voltage acquisition module, which is used to acquire a second display grayscale required to be displayed by at least one second sub-pixel in the image to be displayed, and acquire a second display data voltage corresponding to the second display grayscale, wherein the second sub-pixel has a different color from the first sub-pixel; The compensation voltage acquisition module comprises: a first judgment submodule, electrically connected to the judgment module and the second display voltage acquisition module respectively, and configured to judge whether the second display data voltage is greater than the lighting voltage corresponding to the second subpixel upon receiving the first control instruction, and if so, issue a pure color compensation instruction; if not, issue a complex color compensation instruction; The first acquisition submodule is electrically connected to the first judgment submodule, the first display voltage acquisition module and the compensation module, respectively, and is used to obtain the first compensation data voltage according to the pure color correction coefficient corresponding to the first sub-pixel at the first display grayscale when the pure color compensation instruction is received, and to obtain the first compensation data voltage according to the complex color correction coefficient corresponding to the first sub-pixel at the first display grayscale when the complex color compensation instruction is received.

17. The display device according to claim 16, characterized in that: The display panel includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, wherein the first sub-pixel is the first color sub-pixel, and the second sub-pixel includes the second color sub-pixel and the third color sub-pixel; The second display voltage acquisition module is used to acquire the second A display grayscale required to be displayed by the second color sub-pixel in the picture to be displayed, and acquire the second A display data voltage corresponding to the second A display grayscale, and acquire the second B display grayscale required to be displayed by the third color sub-pixel in the picture to be displayed, and acquire the second B display data voltage corresponding to the second B display grayscale; The first judgment submodule is used for: Upon receiving the first control instruction, determining whether a first condition is satisfied, the first condition being: the second A display data voltage is greater than the light-on voltage corresponding to the second color sub-pixel, and at the same time, the second B display data voltage is greater than the light-on voltage corresponding to the third color sub-pixel; if so, issuing a pure color compensation instruction; if not, determining whether a second condition is satisfied, the second condition being: the second A display data voltage is less than the light-on voltage corresponding to the second color sub-pixel, and at the same time, the second B display data voltage is less than the light-on voltage corresponding to the third color sub-pixel; if so, issuing a white compensation instruction, and if not, issuing a non-white compensation instruction; The first acquisition submodule includes: A first unit is electrically connected to the first judgment submodule, the first display voltage acquisition module and the compensation module respectively, and is used to acquire the first compensation data voltage according to the pure color correction coefficient corresponding to the first subpixel at the first display grayscale when receiving the pure color compensation instruction; a second unit, electrically connected to the first judgment submodule, the first display voltage acquisition module and the compensation module, respectively, and configured to acquire the first compensation data voltage according to the white correction coefficient corresponding to the first subpixel at the first display grayscale upon receiving the white compensation instruction; The third unit is electrically connected to the first judgment submodule, the first display voltage acquisition module and the compensation module respectively, and is used to obtain the first compensation data voltage according to the non-white correction coefficient corresponding to the first sub-pixel at the first display grayscale when receiving the non-white compensation instruction.

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