Organic light emitting display panel, display device and driving method thereof

Abstract

The present application discloses an organic light-emitting display panel, a display device and a driving method thereof, wherein the organic light-emitting display panel includes a first power supply voltage layer, a second power supply voltage layer and a plurality of pixels, wherein the first power supply voltage layer and the second power supply voltage layer are both in a grid shape, wherein the first power supply voltage layer includes a plurality of first frame portions, wherein the second power supply voltage layer includes a plurality of second frame portions, wherein the second frame portions are arranged one-to-one with the first frame portions, and wherein the pixels are arranged one-to-one in the area surrounded by the second frame portions. The above-mentioned design is conducive to improving the uniformity of the organic light-emitting display panel, reducing the number of pixels to be detected and compensated, and shortening the overall compensation time of the organic light-emitting display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an organic light-emitting display panel, a display device and a driving method thereof. Background Art

[0002] OLED (Organic Light-Emitting Diode) and LCD (Liquid Crystal Display) have different light-emitting principles. OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinitely high contrast, low power consumption and extremely high response speed, and has been widely used in terminal devices.

[0003] At present, in OLED panels, the light-emitting units of pixels are provided with high voltage (VDD voltage) and low voltage (VSS voltage) by power chips, and the structure for conducting low voltage is a film layer structure laid in an entire layer in the OLED panel, which is only connected to the power chip at the periphery. The conductive path is single, which is equivalent to resistors in series. The resistors are superimposed. The farther the pixel is, the greater the resistance and the greater the voltage difference. As a result, the light-emitting units of different pixels receive different VSS voltages, making the uniformity of the display panel poor. When compensating the threshold voltage of the driving switch in the pixel, it is usually necessary to compensate the driving switches in all pixels, resulting in a longer overall compensation time. Summary of the invention

[0004] The purpose of the present application is to provide an organic light-emitting display panel, a display device and a driving method thereof, which can improve the uniformity of the organic light-emitting display panel, reduce the number of detections and compensations for driving switches within pixels, and shorten the overall compensation time for the organic light-emitting display panel.

[0005] The present application discloses an organic light-emitting display panel, which includes a first power supply voltage layer, a second power supply voltage layer and a plurality of pixels, wherein the first power supply voltage layer includes at least one first input terminal and a plurality of first output terminals, wherein the plurality of first output terminals are electrically connected to driving switches in the plurality of pixels in a one-to-one correspondence, and output a high voltage to the driving switches; the second power supply voltage layer includes at least one second input terminal and a plurality of second output terminals, wherein the plurality of second output terminals are electrically connected to light-emitting units in the plurality of pixels in a one-to-one correspondence, and output a low voltage to the light-emitting units; wherein the first power supply voltage layer and the second power supply voltage layer are arranged in different layers, and both the first power supply voltage layer and the second power supply voltage layer are in a grid shape, the first power supply voltage layer includes a plurality of first frame portions, and the second power supply voltage layer includes a plurality of second frame portions, wherein the second frame portions are arranged in a one-to-one correspondence with the first frame portions, and the pixels are arranged in a one-to-one correspondence within an area surrounded by the second frame portions.

[0006] Optionally, the width of each portion of the first frame portion is equal, and the width of each portion of the second frame portion is equal.

[0007] The present application also discloses a display device, the display device includes an external compensation circuit and the organic light-emitting display panel as described above, the pixels in the organic light-emitting display panel include a first scan line, a second scan line, a data line, a sensing line, a first switch, a second switch, a driving switch, a capacitor and a light-emitting unit, the control end of the first switch is connected to the first scan line, the input end of the first switch is connected to the data line, the output end of the first switch is connected to the control end of the driving switch, the input end of the driving switch is connected to the first output end of the first power supply voltage layer, the output end of the driving switch is connected to one end of the light-emitting unit, and the other end of the light-emitting unit is connected to the first power supply voltage layer. The first output terminal of the second power supply voltage layer is connected; one end of the capacitor is connected to the output end of the first switch, and the other end of the capacitor is connected to the output end of the driving switch; the control end of the second switch is connected to the second scanning line, the input end of the second switch is connected to the output end of the driving switch, and the output end of the second switch is connected to the sensing line; the external compensation circuit includes a compensation module, a reference voltage line, a third switch and a fourth switch, the sensing line is connected to the reference voltage line through the third switch, the sensing line is connected to one end of the compensation module through the fourth switch, and the other end of the compensation module is connected to the data line.

[0008] Optionally, the pattern of the first power supply voltage layer and the pattern of the second power supply voltage layer are both the same as a pattern surrounded by the data line and the first scan line.

[0009] Optionally, the present application further discloses a method for driving a display device, which is used to drive the display device as described above, comprising the steps of:

[0010] Performing optical inspection on the organic light emitting display panel to determine whether the uniformity of the organic light emitting display panel exceeds a preset value;

[0011] When the uniformity of the organic light emitting display panel exceeds a preset value, only the threshold voltage of the driving switch in the low grayscale pixel is compensated;

[0012] When the uniformity of the organic light emitting display panel is lower than a preset value, the threshold voltages of the driving switches in all pixels are compensated.

[0013] Optionally, the step of optically inspecting the organic light emitting display panel to determine the uniformity of the organic light emitting display panel includes the following steps:

[0014] Setting a plurality of test points in the organic light emitting display panel;

[0015] Passing the same voltage signal to the pixels corresponding to each of the test points; and

[0016] The brightness of each test point is detected by using an optical detector, and the ratio of the test points with the same brightness to the total test points is calculated to determine whether the uniformity of the organic light emitting display panel exceeds a preset value.

[0017] Optionally, when the uniformity of the organic light emitting display panel exceeds a preset value, the step of compensating only the threshold voltage of the driving switch in the low grayscale pixel includes:

[0018] Identify the location of low grayscale pixels;

[0019] Turning on a first scan line in the low grayscale pixel, turning on a corresponding first switch and inputting a data voltage;

[0020] Turning on the third switch so that the sensing line in the low grayscale pixel is connected to the reference voltage;

[0021] Turning on the second scan line in the low grayscale pixel, and inputting a high voltage to the driving switch through the first output terminal in the first power supply voltage layer; and

[0022] The fourth switch is turned on, and the sensing voltage on the sensing line at this time is recorded by the compensation module, and a corresponding compensation voltage is calculated to compensate the corresponding low grayscale pixel.

[0023] Optionally, the preset value is ninety percent.

[0024] Optionally, the organic light emitting display panel is divided into a plurality of compensation areas, and when the uniformity of the organic light emitting display panel is lower than a preset value, only the threshold voltages of the driving switches in the pixels in some compensation areas are compensated.

[0025] Optionally, the driving method further comprises the steps of:

[0026] Taking a photo of the compensated display screen;

[0027] Identify areas of pixels in the photo that appear uneven; and

[0028] The data voltage of the pixel area with uneven display is adjusted to eliminate the uneven display area in the display picture.

[0029] The beneficial effects of the present application are as follows: the present application makes the first power supply voltage layer and the second power supply voltage layer, which provide high voltage and low voltage for the light-emitting unit in the pixel, into a grid shape, so that the first power supply voltage layer forms a plurality of first frame parts set around the pixel, and the second power supply voltage layer forms a plurality of second frame parts set around the pixel. At this time, the first power supply voltage layer and the second power supply voltage layer are equivalent to a plurality of connection paths, which are equivalent to a large number of resistors in parallel. When the pixel is conductive, the conductive path will choose the shortest path to avoid passing through all the wirings at the same time. Therefore, the difference in VDD voltage received by the light-emitting unit in each pixel is small, and the difference in VSS voltage received by the light-emitting unit in each pixel is small, which is conducive to improving the uniformity of the organic light-emitting display panel. When detecting and compensating the organic light-emitting display panel, if the uniformity of the organic light-emitting display panel is high, only some pixels need to be supplemented, thereby reducing the number of pixels to be detected and compensated, and shortening the overall compensation time of the organic light-emitting display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 is a schematic diagram of a display device provided in an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of an analog circuit of an organic light-emitting display panel provided in an embodiment of the present application;

[0033] Figure 3 is a plan view of an organic light emitting display panel provided in an embodiment of the present application;

[0034] Figure 4 is a flow chart of a driving method of a display device provided in an embodiment of the present application;

[0035] Figure 5 is based on Figure 4 A further method flow chart of;

[0036] Figure 6 is based on Figure 4 Another further method flow chart of;

[0037] Figure 7 is based on Figure 4 Another further method flow chart of .

[0038] Among them, 10, display device; 100, organic light-emitting display panel; 110, first power supply voltage layer; 111, first frame portion; 112, first output terminal; 120, second power supply voltage layer; 121, second frame portion; 122, second output terminal; 130, pixel; 131, red pixel; 132, green pixel; 133, blue pixel; scan1, first scan line; scan2, second scan line; data, data line; sen, sensing line; T1, first switch; T2, second switch; DT, driving switch; cst, capacitor; OLED, light-emitting unit; 200, external compensation circuit; 210, compensation module; 220, reference voltage line; T3, third switch; T4, fourth switch. DETAILED DESCRIPTION

[0039] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0040] In addition, unless otherwise clearly specified or limited, "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] like Figure 1 As shown, an embodiment of the present application provides a display device, wherein the display device 10 includes an external compensation circuit 200 and an organic light-emitting display panel 100, wherein the organic light-emitting display panel 100 includes a plurality of pixels 130 distributed in an array, and each pixel 130 includes a first scan line scan1, a second scan line scan2, a data line data, a sensing line sen, a first switch T1, a second switch T2, a driving switch DT, a capacitor cst and a light-emitting unit OLED.

[0042] The control end of the first switch T1 is connected to the first scan line scan1 , the input end of the first switch T1 is connected to the data line data , and the output end of the first switch T1 is connected to the control end of the driving switch DT .

[0043] The input end of the driving switch DT receives the VDD voltage, the output end of the driving switch DT is connected to one end of the light emitting unit OLED, and the other end of the light emitting unit OLED receives the VSS voltage. One end of the capacitor cst is connected to the output end of the first switch T1, and the other end of the capacitor cst is connected to the output end of the driving switch DT.

[0044] The control end of the second switch T2 is connected to the second scan line scan2, the input end of the second switch T2 is connected to the output end of the driving switch DT, and the output end of the second switch T2 is connected to the sensing line sen.

[0045] The external compensation circuit 200 includes a compensation module 210, a reference voltage line 220, a third switch T3 and a fourth switch T4, the sensing line sen is connected to the reference voltage line 220 through the third switch T3, the sensing line sen is connected to one end of the compensation module 210 through the fourth switch T4, and the other end of the compensation module 210 is connected to the data line data.

[0046] In the detection phase of the driving switch DT in the pixel 130, it is necessary to turn on the first scan line scan1, turn on the first switch T1, so that the first switch T1 outputs the data voltage, and at the same time, turn on the third switch T3 to rewrite the voltage on the sensing line sen into the reference voltage; then, the third switch T3 is turned off, the second scan line scan2 is turned on, and the second switch T2 is turned on. At this time, the input end of the driving switch DT receives the VDD voltage, the gate receives the data voltage, the voltage at the output end begins to rise, and the voltage on the sensing line sen also begins to rise until the voltage on the sensing line sen is equal to the difference between the data voltage and the gate-source voltage difference in the driving switch DT. At this time, the gate-source voltage difference is equal to the threshold voltage, so the threshold voltage can be calculated based on the data voltage and the voltage on the sensing line sen.

[0047] During the compensation phase for the driving switch DT in the pixel 130 , the compensation module 210 receives the sensing voltage, calculates the threshold voltage and the voltage to be compensated according to the sensing voltage, and compensates the threshold voltage of the driving switch DT by mixing the data voltage through the data line data.

[0048] Combination Figure 2 and Figure 3As shown, the organic light-emitting display panel 100 also includes a first power supply voltage layer 110 and a second power supply voltage layer 120, wherein the first power supply voltage layer 110 includes at least one first input terminal and a plurality of first output terminals 112, and the plurality of first output terminals 112 are electrically connected one-to-one with the driving switches DT in the plurality of pixels 130, and output a high voltage (VDD voltage) to the driving switches DT; the second power supply voltage layer 120 includes at least one second input terminal and a plurality of second output terminals 122, and the plurality of second output terminals 122 are electrically connected one-to-one with the light-emitting units OLED in the plurality of pixels 130, and output a low voltage (VSS voltage) to the light-emitting units OLED.

[0049] At the same time, the first input terminal and the second input terminal are connected to the power chip in the display device 10. The power chip passes a high voltage (VDD voltage) to the first input terminal. After the high voltage passes through the first power voltage layer 110, it is introduced into the corresponding pixel 130 from the first output terminal 112. The power chip passes a low voltage (VSS voltage) to the second input terminal. After the low voltage passes through the second power voltage layer 120, it is introduced into the corresponding pixel 130 from the second output terminal 122.

[0050] Furthermore, the first power supply voltage layer 110 and the second power supply voltage layer 120 are arranged in different layers. As an example, the first power supply voltage layer 110 is arranged below the switch structure in the pixel 130, and the second power supply voltage layer 120 is arranged above the light-emitting unit OLED in the pixel 130, that is, the first power supply voltage layer 110 and the second power supply voltage layer 120 are respectively located on the upper and lower sides of the pixel 130 structure.

[0051] The first power supply voltage layer 110 and the second power supply voltage layer 120 are both in a grid shape. Figure 3 The first power supply voltage layer 110 includes a plurality of first border portions 111, each of which surrounds a pixel 130, and an edge of the first border portion 111 is distributed between adjacent pixels 130, that is, the orthographic projection of the pixel 130 on the substrate of the organic light-emitting display panel 100 does not overlap with the orthographic projection of the first border portion 111 on the substrate of the organic light-emitting display panel 100.

[0052] The second power supply voltage layer 120 adopts the same design concept as the first power supply voltage layer 110, that is, the second power supply voltage layer 120 includes a plurality of second frame portions 121, the second frame portions 121 are arranged one-to-one with the first frame portions 111, and the pixels 130 are arranged one-to-one in the area enclosed by the second frame portions 121.

[0053] The embodiment of the present application adopts the above-mentioned design, so that the first power supply voltage layer 110 and the second power supply voltage layer 120 are equivalent to multiple connection paths, and a straight wire is used as a resistor. At this time, the first power supply voltage layer 110 and the second power supply voltage layer 120 are equivalent to a large number of resistors in parallel. When the pixel 130 is conductive, since the conductive path will select the shortest path, it is possible to avoid the current passing through all the wirings in the first power supply voltage layer 110 or the second power supply voltage layer 120 at the same time. Therefore, the difference in the VDD voltage received by the light-emitting unit OLED in each pixel 130 is small, and the difference in the VSS voltage received by the light-emitting unit OLED in each pixel 130 is small, which is conducive to improving the uniformity of the organic light-emitting display panel 100. When the organic light-emitting display panel 100 is detected and compensated, if the uniformity of the organic light-emitting display panel 100 is high, the number of detection and compensation of the pixels 130 can also be reduced, and the overall compensation time of the organic light-emitting display panel 100 can be shortened.

[0054] like Figure 3 As shown, as a specific example, the pixels 130 in the organic light emitting display panel 100 are divided into three types, namely red pixels 131, green pixels 132 and blue pixels 133, wherein the area of ​​each blue pixel 133 is equal to the sum of the area of ​​one red pixel 131 and the area of ​​one green pixel 132, the red pixel 131 and the green pixel 132 are both square, and the areas of the two are equal, and the blue pixel 133 is rectangular; and a red pixel 131, a green pixel 132 and a blue pixel 133 are arranged to form a square structure. In this example, the first frame portion 111 and the second frame portion 121 are adaptively designed according to the size of the corresponding pixel 130.

[0055] In the embodiment of the present application, the second power supply voltage layer 120 is manufactured using a conductive partition structure, that is, an inverted conductive partition structure is first made using CVD (Chemical Vapor Deposition), and then the second power supply voltage layer 120 with a grid pattern is vapor-deposited on this basis.

[0056] In the embodiment of the present application, the widths of the first border portion 111 are equal at various locations, and the widths of the second border portion 121 are equal at various locations, so as to further improve the uniformity of the first power supply voltage layer 110 and the uniformity of the second power supply voltage layer 120 , which is beneficial to further improve the uniformity of the organic light-emitting display panel 100 .

[0057] In the embodiment of the present application, the pattern of the first power supply voltage layer 110 and the pattern of the second power supply voltage layer 120 are the same as the pattern surrounded by the data line data and the first scan line scan1, that is, the orthographic projections of the three on the substrate of the organic light emitting display panel 100 overlap. This design is conducive to improving the aperture ratio of the organic light emitting display panel 100, and can also enhance the light blocking effect between adjacent pixels 130, and further weaken the light mixing effect between the pixels 130.

[0058] like Figure 4 As shown, the present application also discloses a method for driving a display device, which is used to drive the above-mentioned display device 10. The driving method specifically includes the steps of:

[0059] A: optically inspecting the organic light emitting display panel to determine whether the uniformity of the organic light emitting display panel exceeds a preset value;

[0060] B: When the uniformity of the organic light emitting display panel exceeds a preset value, only the threshold voltage of the driving switch in the low grayscale pixel is compensated;

[0061] C: When the uniformity of the organic light emitting display panel is lower than a preset value, the threshold voltages of the driving switches in all pixels are compensated.

[0062] In the embodiment of the present application, the first power supply voltage layer and the second power supply voltage layer are designed in a grid shape, and the line impedance of the entire surface of the first power supply voltage layer and the second power supply voltage layer is small, which can improve the uniformity of the organic light emitting display panel, so that the organic light emitting display panel emits light uniformly. At this time, the voltage (VGS) of each pixel at the control end of the driving switch changes less, the difference in the VDD voltage of each area is small, the difference in the threshold voltage between pixels is small, and the number of driving switches that need to adjust the gate voltage is small.

[0063] After improving the first power supply voltage layer and the second power supply voltage layer, if the uniformity of the organic light-emitting display panel is still detected to be poor, it is necessary to detect and compensate the drive switches in all pixels; if the uniformity of the organic light-emitting display panel is detected to be poor, only a part of the pixels need to be detected and compensated, or even no detection and compensation are needed, and it is not easy to find abnormalities in the display screen. Pixels displaying low grayscales have a darker brightness, and when the threshold voltage is abnormal, the abnormality of the display area will be more obvious. Therefore, in order to ensure the display effect, the embodiment of the present application still detects and compensates low grayscale pixels when the uniformity of the organic light-emitting display panel is high.

[0064] like Figure 5 As shown, in step A, it specifically includes:

[0065] A1: Set multiple test points in the organic light emitting display panel;

[0066] A2: applying the same voltage signal to the pixels corresponding to each of the test points;

[0067] A3: Use an optical detector to detect the brightness of each test point, calculate the ratio of the test points with the same brightness to the total test points, and determine whether the uniformity of the organic light-emitting display panel exceeds a preset value.

[0068] The embodiment of the present application adds uniformity detection during the test phase of the display device. According to the size of the organic light-emitting display panel, nine test points, twenty-five test points, or one hundred and thirty-five test points can be set. The selection is made according to the actual situation. The more test points there are, the more accurate the uniformity judgment is. Then, the uniformity is judged by detecting the ratio of the test points with the same brightness to the total number of points. Of course, the uniformity can also be judged by the ratio of the average brightness to the maximum brightness.

[0069] When the grayscale level of the organic light emitting display panel is 2 8 When the brightness is 2 4 The following pixels are low grayscale pixels. In the embodiment of the present application, there is no specific limitation on the requirements for low grayscale pixels, and they are selected based on actual conditions.

[0070] like Figure 6 As shown, in step B, the preset value is 90%. When the uniformity of the organic light emitting display panel exceeds 90%, the steps specifically include:

[0071] B1: Identify the location of low grayscale pixels;

[0072] B2: Turn on the first scan line in the low grayscale pixel, turn on the corresponding first switch and input the data voltage;

[0073] B3: Turn on the third switch so that the sensing line in the low grayscale pixel is connected to the reference voltage;

[0074] B4: Turn on the second scan line in the low grayscale pixel, and input a high voltage to the driving switch through the first output terminal in the first power supply voltage layer;

[0075] B5: Turn on the fourth switch, record the sensing voltage on the sensing line at this time through the compensation module, and calculate the corresponding compensation voltage to compensate the corresponding low grayscale pixel.

[0076] It should be noted that in other embodiments, the preset value may also be 80%, 95%, etc.

[0077] In another embodiment of the present application, the organic light-emitting display panel is divided into a plurality of compensation areas, and when the uniformity of the organic light-emitting display panel is lower than a preset value, only the threshold voltage of the driving switch in the pixel in a part of the compensation area is compensated to reduce the detection frequency. For example: a plurality of compensation areas are arranged along the length direction of the data line, and since the compensation area close to the driving chip and the external compensation circuit is affected by the heat of the chip, the threshold voltage of the driving voltage in the pixel is more seriously offset, and the abnormal driving switch in the compensation area accounts for a large proportion in the entire panel, so it is only necessary to focus on detecting and compensating this area.

[0078] Alternatively, after the compensation areas are divided, only part of the pixels are detected and compensated in some compensation areas, while all the pixels are detected and compensated in other compensation areas.

[0079] Of course, in other embodiments, the multiple compensation areas of the organic light emitting display panel may be divided into a grid shape or other shapes, and the pixels in one or part of the compensation areas may be detected and compensated as needed.

[0080] Further, such as Figure 7 As shown, after step B and step C, the driving method further comprises the steps of:

[0081] D: Take a photo of the compensated display screen;

[0082] E: Identify pixel areas with uneven display in photos;

[0083] F: Adjust the data voltage of the pixel area with uneven display to eliminate the uneven display area in the display picture.

[0084] In the embodiment of the present application, after compensating the threshold voltage of the driving switch in the pixel, optical compensation is further performed on the organic light-emitting display panel to eliminate the uneven brightness. First, a camera is used to take a picture of the display screen, and then a De-mura device is used to record and analyze the photographed picture. The input voltage is adjusted for the position where the brightness is uneven, and the uneven display area in the display screen is eliminated, thereby further improving the uniformity of the display screen.

[0085] It should be noted that the limitations on the various steps involved in this solution are not considered to limit the order of the steps without affecting the implementation of the specific solution. The steps written in front can be executed first, or later, or even simultaneously. The solutions of different implementation embodiments can be combined and applied without conflict. As long as this solution can be implemented, it should be regarded as belonging to the scope of protection of this application.

[0086] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. An organic light emitting display panel, characterized in that: The device comprises a first power supply voltage layer, a second power supply voltage layer and a plurality of pixels, wherein the first power supply voltage layer comprises at least one first input terminal and a plurality of first output terminals, wherein the plurality of first output terminals are electrically connected to driving switches in the plurality of pixels in a one-to-one correspondence and output a high voltage to the driving switches; The second power supply voltage layer includes at least one second input terminal and a plurality of second output terminals, wherein the plurality of second output terminals are electrically connected to the light emitting units in the plurality of pixels in a one-to-one correspondence, and output a low voltage to the light emitting units; Among them, the first power supply voltage layer and the second power supply voltage layer are arranged in different layers, the first power supply voltage layer and the second power supply voltage layer are both grid-shaped, the first power supply voltage layer includes a plurality of first border portions, the second power supply voltage layer includes a plurality of second border portions, the second border portions are arranged in a one-to-one correspondence with the first border portions, and the pixels are arranged in a one-to-one correspondence within the area enclosed by the second border portions.

2. The organic light emitting display panel according to claim 1, wherein: The width of each portion of the first frame portion is equal, and the width of each portion of the second frame portion is equal.

3. A display device, comprising an external compensation circuit and an organic light emitting display panel according to any one of claims 1 to 2, characterized in that: The pixel in the organic light emitting display panel includes a first scan line, a second scan line, a data line, a sensing line, a first switch, a second switch, a driving switch, a capacitor and a light emitting unit, wherein the control end of the first switch is connected to the first scan line, the input end of the first switch is connected to the data line, the output end of the first switch is connected to the control end of the driving switch, the input end of the driving switch is connected to the first output end of the first power supply voltage layer, the output end of the driving switch is connected to one end of the light emitting unit, and the other end of the light emitting unit is connected to the second output end of the second power supply voltage layer; one end of the capacitor is connected to the output end of the first switch, and the other end of the capacitor is connected to the output end of the driving switch; the control end of the second switch is connected to the second scan line, the input end of the second switch is connected to the output end of the driving switch, and the output end of the second switch is connected to the sensing line; The external compensation circuit includes a compensation module, a reference voltage line, a third switch and a fourth switch, the sensing line is connected to the reference voltage line through the third switch, the sensing line is connected to one end of the compensation module through the fourth switch, and the other end of the compensation module is connected to the data line.

4. The display device according to claim 3, characterized in that The pattern of the first power supply voltage layer and the pattern of the second power supply voltage layer are both the same as a pattern surrounded by the data line and the first scan line.

5. A method for driving a display device, for driving the display device according to any one of claims 3 to 4, characterized in that: Includes steps: Performing optical inspection on the organic light emitting display panel to determine whether the uniformity of the organic light emitting display panel exceeds a preset value; When the uniformity of the organic light emitting display panel exceeds a preset value, only the threshold voltage of the driving switch in the low grayscale pixel is compensated; When the uniformity of the organic light emitting display panel is lower than a preset value, the threshold voltages of the driving switches in all pixels are compensated.

6. The method for driving a display device according to claim 5, wherein: The step of optically inspecting the organic light emitting display panel to determine whether the uniformity of the organic light emitting display panel exceeds a preset value includes the following steps: Setting a plurality of test points in the organic light emitting display panel; Passing the same voltage signal into the pixel corresponding to each of the test points; as well as The brightness of each test point is detected by using an optical detector, and the ratio of the test points with the same brightness to the total test points is calculated to determine whether the uniformity of the organic light emitting display panel exceeds a preset value.

7. The method for driving a display device according to claim 5, wherein: When the uniformity of the organic light emitting display panel exceeds a preset value, the step of compensating only the threshold voltage of the driving switch in the low grayscale pixel includes: Identify the location of low grayscale pixels; Turning on a first scan line in the low grayscale pixel, turning on a corresponding first switch and inputting a data voltage; Turning on the third switch so that the sensing line in the low grayscale pixel is connected to the reference voltage; Turning on the second scan line in the low grayscale pixel, and inputting a high voltage to the driving switch through the first output terminal in the first power supply voltage layer; and The fourth switch is turned on, and the sensing voltage on the sensing line at this time is recorded by the compensation module, and a corresponding compensation voltage is calculated to compensate the corresponding low grayscale pixel.

8. The method for driving a display device according to claim 5, wherein: The preset value is ninety percent.

9. The method for driving a display device according to claim 5, wherein: The organic light emitting display panel is divided into a plurality of compensation areas. When the uniformity of the organic light emitting display panel is lower than a preset value, only the threshold voltages of the driving switches in the pixels in some compensation areas are compensated.

10. The method for driving a display device according to claim 5, wherein: The driving method further comprises the steps of: Taking a photo of the compensated display screen; Identify pixel areas in photos that appear uneven; as well as The data voltage of the pixel area with uneven display is adjusted to eliminate the uneven display area in the display picture.

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