Display panel, display panel detection method and display device

Abstract

The present application discloses a display panel, a detection method for a display panel and a display device, and relates to the field of OLED display technology; the display panel comprises a detection circuit, a judgment unit and a control unit; the detection circuit is connected to a pixel structure to detect a voltage value of the pixel structure; the judgment unit is connected to a first detection circuit to judge whether the pixel structure is abnormally displayed or normally displayed according to the detected voltage value; the control unit is connected to the judgment unit to determine the maximum displayable area of ​​the display panel according to the position of the abnormally displayed pixel structure; when the area of ​​the maximum displayable area is greater than one-half of the area of ​​the display panel, the displayable area is controlled to be displayed; when the area of ​​the maximum displayable area is less than one-half of the area of ​​the display panel, the display panel is controlled not to be displayed but voice broadcast is performed; the present application can still enable a user to obtain display content information of the display panel when a part of the vehicle-mounted screen is damaged, without affecting the user's driving and use.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) has many advantages such as self-luminescence, low driving voltage, high luminous efficiency, short response time, high clarity and contrast, flexible display and large-area full-color display, etc. It is recognized by the industry as the display device with the most development potential. The current usage scenarios of OLED display devices have spread to mobile phone screens, TV screens and car display screens.

[0003] However, existing vehicle screens are usually used to display vehicle speed, remaining fuel / battery level, navigation, music playing and other usage scenarios. When using the vehicle screen, there are strict requirements on the reliability of the screen. If the vehicle screen is damaged or abnormal during driving, the content displayed on the screen will be blocked by the abnormal area or cannot be displayed, which will seriously affect the driver's acquisition of navigation information and vehicle driving information, etc., which is very inconvenient. Summary of the invention

[0004] The purpose of the present application is to provide a display panel, a detection method for a display panel, and a display device, which can still enable a user to obtain display content information of the display panel when a part of the vehicle screen is damaged, without affecting the user's driving and use.

[0005] The present application discloses a display panel, comprising a plurality of pixel structures, each of which comprises a light-emitting unit, and the display panel further comprises a detection circuit, a judgment unit and a control unit; the detection circuit is connected to the pixel structure to detect a voltage value of the pixel structure; the judgment unit is connected to the first detection circuit to judge whether the pixel structure is abnormally displayed or normally displayed according to the detected voltage value; the control unit is connected to the judgment unit to determine the maximum displayable area of ​​the display panel according to the position of the abnormally displayed pixel structure; wherein, when the area of ​​the maximum displayable area is greater than one-half of the area of ​​the display panel, the displayable area is controlled to be displayed; when the area of ​​the maximum displayable area is less than one-half of the area of ​​the display panel, the display panel is controlled not to display but to perform voice broadcast.

[0006] Optionally, the light-emitting unit includes a cathode layer, an anode layer and a light-emitting layer arranged between the cathode layer and the anode layer, the display panel includes a timing controller, the detection circuit includes a first detection unit and a first switch, the control end of the first switch is connected to the timing controller, the output end of the first switch is connected to the first detection unit, and the input end of the first switch is connected between the anode layer and the light-emitting layer; wherein, when the first switch is in an on state, the first detection unit detects the voltage value of the anode layer to determine whether the pixel structure is abnormally displayed or normally displayed.

[0007] Optionally, the light-emitting unit includes a cathode layer, an anode layer and a light-emitting layer arranged between the cathode layer and the anode layer, the display panel includes a timing controller, and the detection circuit includes a first detection unit, a first switch, a second detection unit and a second switch, the control end of the first switch is connected to the timing controller, the output end of the first switch is connected to the first detection unit, the input end of the first switch is connected to between the anode layer and the light-emitting layer, the control end of the second switch is connected to the timing controller, the output end of the second switch is connected to the second detection unit, and the input end of the second switch is connected to between the cathode layer and the light-emitting layer; wherein, when the first switch is in an on state, the first detection unit detects a voltage value of the anode layer, and when the second switch is in an on state, the second detection unit detects a voltage value of the cathode layer, so as to determine whether the pixel structure is one of abnormal display, normal display or black screen display.

[0008] Optionally, the detection circuit is provided in multiple numbers and is respectively arranged in multiple pixel structures, and there are X pixel structures between two adjacent pixel structures provided with the detection circuit; wherein X is greater than or equal to 1.

[0009] Optionally, the first detection unit and the second detection unit are analog-to-digital converters.

[0010] The present application also discloses a display panel detection method, which is applied to the display panel as described above, and comprises the steps of:

[0011] Obtaining the location of the abnormal pixel structure;

[0012] According to the position of the abnormal pixel structure, the maximum displayable area is obtained;

[0013] It is determined whether the area of ​​the largest displayable region is greater than half of the area of ​​the display panel. If so, the displayable region is used for zoomed screen display. If so, the display content is announced by voice.

[0014] Optionally, the step of obtaining the position of the abnormal pixel structure includes:

[0015] When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the anode layer;

[0016] According to the detected voltage value, it is determined whether the pixel structure is displaying normally or abnormally.

[0017] Optionally, the step of obtaining the position of the abnormal pixel structure includes:

[0018] When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the cathode layer, and detecting the voltage value between the light-emitting layer and the anode layer;

[0019] According to the detected voltage value, it is determined that the pixel structure is one of normal display, abnormal display or black screen display.

[0020] Optionally, according to the position of the abnormal pixel structure, the step of obtaining the maximum displayable area includes:

[0021] Establish a plane coordinate system;

[0022] Mark the position of the abnormal pixel structure on the plane coordinate system;

[0023] In the plane coordinate system, after excluding the position of the abnormal pixel structure, the maximum displayable area is obtained;

[0024] Wherein, the displayable area is a rectangular structure.

[0025] The present application also discloses a display device, comprising a driving circuit and the display panel as described above, wherein the driving circuit drives the display panel.

[0026] The display panel of the present application uses a detection circuit and a judgment unit in combination to determine whether each pixel structure in the display panel is abnormally displayed or normally displayed, and then obtains the judgment result through a control unit to determine the maximum displayable area of ​​the display panel, so that when the display panel is damaged or has an abnormal pixel structure, it can still be zoomed for display or the user can obtain the display content information of the display panel through voice broadcast, and when the vehicle-mounted screen is partially damaged, it will not affect the user's driving and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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:

[0028] Figure 1 is a structural schematic diagram of a display panel according to the first embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a detection circuit according to a first embodiment of the present application;

[0030] Figure 3 is a schematic diagram of the steps of a display panel detection method according to the second embodiment of the present application;

[0031] Figure 4 is a schematic diagram of some steps of a detection method for a display panel according to the second embodiment of the present application;

[0032] Figure 5 is a schematic diagram of some steps of a detection method for a display panel according to the second embodiment of the present application;

[0033] Figure 6 is a schematic diagram of some steps of a detection method for a display panel according to the second embodiment of the present application;

[0034] Figure 7 It is a structural schematic diagram of a display device of the third embodiment of the present application.

[0035] Among them, 100, display panel; 200, pixel structure; 300, detection circuit; 310, first detection unit; 320, first switch; 330, second detection unit; 340, second switch; 400, judgment unit; 500, control unit; 600, driving circuit; 700, display device. DETAILED DESCRIPTION

[0036] 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.

[0037] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0038] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0039] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The present application is described in detail below with reference to the accompanying drawings and optional embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] like Figure 1 As shown, as a first embodiment of the present application, a display panel 100 is disclosed, wherein the display panel 100 includes a plurality of pixel structures 200, each of the pixel structures 200 includes a light-emitting unit, and the display panel 100 also includes a detection circuit 300, a judgment unit 400 and a control unit 500, wherein the detection circuit 300 is connected to the pixel structure 200 to detect the voltage value of the pixel structure 200, the judgment unit 400 is connected to the first detection circuit 300, and determines whether the pixel structure 200 is abnormally displayed or normally displayed according to the detected voltage value, and the control unit 500 is connected to the judgment unit 400 to determine whether the pixel structure 200 is abnormally displayed or normally displayed according to the position of the abnormally displayed pixel structure 200. The maximum displayable area of ​​the display panel 100; when the area of ​​the maximum displayable area is larger than one half of the area of ​​the display panel 100, the displayable area is controlled to be displayed; when the area of ​​the maximum displayable area is smaller than one half of the area of ​​the display panel 100, the display panel 100 is controlled not to display but to perform voice broadcast; it should be noted that the condition for dividing the display panel 100 into zoom display or voice broadcast is not limited to one half of the area of ​​the display panel 100, and the designer can also select and design the condition according to actual needs, for example, designing it to be three quarters or one third of the area of ​​the display panel 100, as long as it can meet the viewing needs when the zoom display is displayed.

[0042] When in use, the detection circuit 300 detects the voltage value of the pixel structure 200 to obtain the actual voltage value of the pixel structure 200 when in use. The judgment unit 400 then judges whether the pixel structure 200 is abnormally displayed or normally displayed according to the actual voltage value of the pixel structure 200 obtained by the detection circuit 300 when in use. By combining the detection circuit 300 and the judgment unit 400, it is known whether each pixel structure 200 in the display panel 100 is abnormally displayed or normally displayed, so as to divide the maximum displayable area of ​​the display panel 100. Then, through the control unit 500, the control unit 500 obtains the position of the abnormally displayed pixel structure 200 judged by the judgment unit 400 to determine the maximum displayable area of ​​the display panel 100, wherein the maximum displayable area of ​​the display panel 100 is a rectangular area, so as to fully zoom in and out the display content of the display panel 100. The inventor of the present application also considers that if the displayable area is small, blindly zooming in and out the display content may result in the display content being unable to be seen clearly. Therefore, after the control unit 500 determines the maximum displayable area of ​​the display panel 100, when the area of ​​the maximum displayable area is greater than half of the area of ​​the display panel 100, the displayable area is controlled to be zoomed and displayed to ensure the display quality; and when the area of ​​the maximum displayable area is less than half of the area of ​​the display panel 100, the display panel 100 is controlled not to display but converted into a voice broadcast form, so that the user can obtain the displayed content information; In general, the display panel 100 of the present application, through the combined use of the detection circuit 300 and the judgment unit 400, is known that each pixel structure 200 in the display panel 100 is abnormally displayed or normally displayed, and then the control unit 500 is used to obtain the judgment result to determine the maximum displayable area of ​​the display panel 100, so that the display panel 100 can still be zoomed and displayed or the user can obtain the information of the display content of the display panel 100 through voice broadcast when the pixel structure 200 is damaged or abnormal, and the user's driving and use are not affected when the vehicle-mounted screen is partially damaged.

[0043] Among them, Figure 2 As shown, the light-emitting unit includes a cathode layer, an anode layer and a light-emitting unit arranged between the cathode layer and the anode layer. The display panel 100 also includes a timing controller. The detection circuit 300 can be arranged in two ways. The two arrangements of the detection circuit 300 are as follows:

[0044] The first detection circuit 300 is set as follows: the detection circuit 300 includes a first detection unit 310 and a first switch 320, the control end of the first switch 320 is connected to the timing controller, the output end of the first switch 320 is connected to the first detection unit 310, and the input end of the first switch 320 is connected between the anode layer and the light-emitting layer. When the first switch 320 is in the on state, the first detection unit 310 detects the voltage value of the anode layer to determine whether the pixel structure 200 is abnormally displayed or normally displayed; this detection circuit 300 is set to detect the voltage value of the anode layer of the pixel structure 200, so as to distinguish whether the pixel structure 200 is abnormally displayed or normally displayed, so that the display panel 100 can still be zoomed and displayed or the user can obtain the information of the display content of the display panel 100 through voice broadcast when the pixel structure 200 is damaged or abnormal, and the driving and use of the user are not affected when the vehicle-mounted screen is partially damaged;

[0045] The second detection circuit 300 is configured as follows: the detection circuit 300 includes a first detection unit 310, a first switch 320, a second detection unit 330, and a second switch 340, wherein the control end of the first switch 320 is connected to the timing controller, the output end of the first switch 320 is connected to the first detection unit 310, the input end of the first switch 320 is connected between the anode layer and the light-emitting layer, the control end of the second switch 340 is connected to the timing controller, and the output end of the second switch 340 is connected to the second detection unit 330. , the input end of the second switch 340 is connected between the cathode layer and the light-emitting layer, when the first switch 320 is in the on state, the first detection unit 310 detects the voltage value of the anode layer, and when the second switch 340 is in the on state, the second detection unit 330 detects the voltage value of the cathode layer, so as to determine whether the pixel structure 200 is abnormal display, normal display or black screen display; the setting mode of the detection circuit 300 not only detects the voltage value of the anode layer of the pixel structure 200, but also detects the voltage value of the cathode layer of the pixel structure 200. By detecting the voltage value of the anode layer of the pixel structure 200, it can be distinguished whether the pixel structure 200 is abnormally displayed or normally displayed, and then detecting the voltage value of the cathode layer of the pixel structure 200, by calculating the voltage difference between the voltage value of the cathode layer and the voltage value of the anode layer, it can be distinguished whether the pixel structure 200 that has been abnormally displayed can be displayed, so that the pixel structure 200 can be distinguished as abnormal display, normal display or black screen display, so that the displayable area divided by the display panel 100 is more delicate. For example, when the display screen of the display panel 100 does not have high color requirements, it can be The pixel structure 200 determined to be abnormally displayed is also divided into the displayable area to maximize the area of ​​the displayable area. The display image can maintain a larger display area for display, so that the user can still obtain the display content from the vehicle screen when the vehicle screen is damaged or abnormal; and when the display image of the display panel 100 has high color requirements, the displayable area only includes the pixel structure 200 for normal display, so that the user can still obtain display content with high display quality when the vehicle screen is damaged or abnormal.

[0046] Furthermore, the detection circuit 300 is provided in a plurality of pixel structures 200, respectively, and there are X pixel structures 200 between two adjacent pixel structures 200 provided with the detection circuit 300, wherein X is greater than or equal to 1. When the pixel structure 200 provided with the detection circuit 300 is determined by the judgment unit 400 to be a normal display or an abnormal display, the X pixel structures 200 around it are all defaulted to be a normal display or an abnormal display. In this embodiment, X is equal to 50, that is, when the pixel structure 200 provided with the detection circuit 300 is determined by the judgment unit 400 to be a normal display or an abnormal display, the pixel structures 200 around it are defaulted to be a normal display or an abnormal display. When the structure 200 is determined to be an abnormal display, the 50 pixel structures 200 around it are all defaulted to be abnormal displays, and vice versa; this arrangement can reduce the production cost of the display panel 100. It is not necessary for each pixel structure 200 to be provided with a detection circuit 300. It can also be achieved that when the display panel 100 is damaged or an abnormal pixel structure 200 appears, it can still be zoomed and displayed or the user can obtain information about the display content of the display panel 100 through voice broadcast, and when the vehicle-mounted screen is partially damaged, it will not affect the user's driving and use.

[0047] Furthermore, the first detection unit 310 and the second detection unit 330 are analog-to-digital converters, so that the detected voltage value of the anode layer and the voltage value of the cathode layer can be converted into digital signals through the analog-to-digital converter to facilitate judgment.

[0048] like Figure 3 As shown, as a second embodiment of the present application, a detection method for a display panel is disclosed, which is applied to the display panel described in the above embodiment, and includes the steps of:

[0049] Obtaining the location of the abnormal pixel structure;

[0050] According to the position of the abnormal pixel structure, the maximum displayable area is obtained;

[0051] It is determined whether the area of ​​the largest displayable region is greater than half of the area of ​​the display panel. If so, the displayable region is used for zoomed screen display. If so, the display content is announced by voice.

[0052] The detection method of the display panel in this embodiment detects the voltage value of the pixel structure through the detection circuit, determines whether the pixel structure is abnormally displayed according to the detected voltage value, and then divides the non-display area and the displayable area according to the position of the pixel structure determined to be abnormally displayed, and then determines a maximum displayable area. After obtaining the maximum displayable area, it is determined whether the area of ​​the displayable area is greater than half of the area of ​​the display panel. If it is greater, the displayable area is used to zoom the screen display so that the user can continue to obtain the display content from the screen displayed by the display panel. If it is less than, the display panel does not display, and the display content is switched to voice broadcast. In general, the detection method of the display panel of the present embodiment uses a detection circuit and a judgment unit in combination to determine whether each pixel structure in the display panel is abnormally displayed or normally displayed, and then obtains the judgment result through the control unit to determine the maximum displayable area of ​​the display panel, so that when the display panel is damaged or has an abnormal pixel structure, it can still be zoomed and displayed or the user can obtain information about the display content of the display panel through voice broadcast, and when the vehicle-mounted screen is partially damaged, it will not affect the user's driving and use; it should be noted that the displayable area is generally a rectangular structure to facilitate zooming and displaying content.

[0053] Further, such as Figure 4 As shown, the step of obtaining the position of the abnormal pixel structure includes:

[0054] When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the anode layer;

[0055] According to the detected voltage value, determining whether the pixel structure is displaying normally or abnormally;

[0056] In this embodiment, the voltage value between the light-emitting layer and the anode layer is detected to obtain the voltage value of the anode layer of the pixel structure, so that the pixel structure can be judged as normally displaying or abnormally displaying according to the obtained voltage value of the anode layer. When performing the detection, the display panel usually displays a fixed test screen so that the voltage value of the anode layer obtained by the test is set to a fixed standard value, which is convenient for distinguishing whether the pixel structure is normally displaying or abnormally displaying.

[0057] Of course, it is not limited to detecting the voltage value between the light-emitting layer and the anode layer, but also possible to detect the voltage value between the light-emitting layer and the cathode layer, such as Figure 5 As shown, the step of obtaining the position of the abnormal pixel structure includes:

[0058] When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the cathode layer, and detecting the voltage value between the light-emitting layer and the anode layer;

[0059] According to the detected voltage value, determining whether the pixel structure is normal display, abnormal display or black screen display;

[0060] By detecting the voltage value between the light-emitting layer and the anode layer, and detecting the voltage value between the light-emitting layer and the cathode layer, the voltage value of the anode layer and the voltage value of the cathode layer in the pixel structure are obtained. First, the pixel structure is judged to be normally displayed or abnormally displayed according to the voltage value of the anode layer in the pixel structure obtained, and then the pixel structure is judged to be abnormally displayed or black screen displayed according to the voltage difference between the voltage value of the cathode layer and the voltage value of the anode layer obtained, so as to classify the pixel structure for the next step of dividing the displayable area; wherein, the pixel structure is divided into the types of abnormal display and black screen display to expand the displayable area. For example, when the display content is a navigation interface, the requirement for display color is relatively low, and the pixel structure with abnormal display can be divided into the displayable area, which is conducive to constructing a larger displayable area, so that the user can more conveniently obtain the information of the display content; and if the display content is a video interface, the requirement for display color is relatively high, and the pixel structure with abnormal display is not divided into the displayable area, so that the user can obtain the better display of the picture content in the displayable area.

[0061] Further, such as Figure 6 As shown, according to the acquired position of the abnormal pixel structure, the step of acquiring the maximum displayable area includes:

[0062] Establish a plane coordinate system;

[0063] Mark the position of the abnormal pixel structure on the plane coordinate system;

[0064] In the plane coordinate system, after excluding the position of the abnormal pixel structure, the maximum displayable area is obtained;

[0065] Wherein, the displayable area is a rectangular structure;

[0066] Specifically, when the judgment unit divides the pixel structure into abnormal display and normal display, a plane coordinate system is established with the display panel as the plane, and the position of the pixel structure with abnormal display is marked on the plane coordinate system, so that the position of the pixel structure with abnormal display can be excluded and the position of the pixel structure with normal display can be fixedly marked, thereby facilitating the acquisition of the maximum displayable area according to the marked position of the pixel structure with normal display.

[0067] Furthermore, when obtaining the displayable area, it is not limited to obtaining the largest displayable area, but can also be selected according to the aspect ratio of the display content. For example, when the aspect ratio of the display content is 16:9, it is generally a widescreen display content, and a wider displayable area can be selected for display, so that the display content can still maintain a relatively clear display after scaling. When the aspect ratio of the display content is 4:3, it is generally a narrowscreen display content, and a square displayable area can be selected for display, so that the display content can still maintain a relatively clear display after scaling. Of course, designers can also choose to design according to actual needs, which is not limited here.

[0068] like Figure 7 As shown, as the third embodiment of the present application, a display device 700 is disclosed, wherein the display device 700 includes a driving circuit 600 and the display panel 100 as described in the above embodiment, wherein the driving circuit 600 drives the display panel 100; the display device 700 of the present application uses a detection circuit 300 and a judgment unit 400 in combination to determine whether each pixel structure 200 in the display panel 100 is abnormally displayed or normally displayed, and then obtains the judgment result through a control unit 500 to determine the maximum displayable area of ​​the display panel 100, so that the display panel 100 can still be zoomed and displayed or the user can obtain information about the display content of the display panel 100 through voice broadcast when a damaged or abnormal pixel structure 200 occurs, and the user's driving and use are not affected when the vehicle-mounted screen is partially damaged.

[0069] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0070] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0071] 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. A display panel, comprising a plurality of pixel structures, each of the pixel structures comprising a light-emitting unit, the light-emitting unit comprising a cathode layer, an anode layer and a light-emitting layer arranged between the cathode layer and the anode layer, the display panel comprising a timing controller, characterized in that: Also includes: a detection circuit connected to the pixel structure to detect the voltage value of the pixel structure, the detection circuit comprising a first detection unit, a first switch, a second detection unit and a second switch, the control end of the first switch being connected to the timing controller, the output end of the first switch being connected to the first detection unit, the input end of the first switch being connected to between the anode layer and the light-emitting layer, the control end of the second switch being connected to the timing controller, the output end of the second switch being connected to the second detection unit, and the input end of the second switch being connected to between the cathode layer and the light-emitting layer; A judgment unit, connected to the detection circuit, for judging whether the pixel structure is abnormally displayed or normally displayed according to the detected voltage value; as well as A control unit connected to the judgment unit, and determining a maximum displayable area of ​​the display panel according to the position of the abnormally displayed pixel structure; When the first switch is in the on state, the first detection unit detects the voltage value of the anode layer, and when the second switch is in the on state, the second detection unit detects the voltage value of the cathode layer, so as to determine whether the pixel structure is in abnormal display, normal display or black screen display; Wherein, the first mode or the second mode is selected according to the color requirement of the display screen of the display panel, the first mode means dividing the pixel structure with abnormal display into the displayable area, and the second mode means that the displayable area only includes the normal pixel structure, and the color display requirement of the display screen of the first mode is lower than the color display requirement of the display screen of the second mode; Among them, when the area of ​​the largest displayable area is larger than half of the area of ​​the display panel, the displayable area is controlled to display; when the area of ​​the largest displayable area is smaller than half of the area of ​​the display panel, the display panel is controlled not to display but to perform voice broadcast.

2. The display panel according to claim 1, characterized in that: The detection circuits are provided in a plurality and are respectively arranged in a plurality of the pixel structures, and there is a spacing of X pixel structures between two adjacent pixel structures provided with the detection circuits; Wherein, X is greater than or equal to 1.

3. The display panel according to claim 1, characterized in that: The first detection unit and the second detection unit are analog-to-digital converters.

4. A detection method for a display panel, applied to the display panel according to any one of claims 1 to 3, characterized in that: Includes steps: Obtaining the location of the abnormal pixel structure; According to the position of the abnormal pixel structure, the maximum displayable area is obtained; It is determined whether the area of ​​the largest displayable region is greater than half of the area of ​​the display panel. If so, the displayable region is used for zoomed screen display. If so, the display content is announced by voice.

5. A detection method according to claim 4, characterized in that: The steps of obtaining the position of the abnormal pixel structure include: When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the anode layer; According to the detected voltage value, it is determined whether the pixel structure is displaying normally or abnormally.

6. A detection method according to claim 4, characterized in that: The steps of obtaining the position of the abnormal pixel structure include: When the light-emitting layer emits light, detecting the voltage value between the light-emitting layer and the cathode layer, and detecting the voltage value between the light-emitting layer and the anode layer; According to the detected voltage value, it is determined that the pixel structure is one of normal display, abnormal display or black screen display.

7. A detection method according to claim 4, characterized in that: According to the position of the abnormal pixel structure, the steps of obtaining the maximum displayable area include: Establish a plane coordinate system; Mark the position of the abnormal pixel structure on the plane coordinate system; In the plane coordinate system, after excluding the position of the abnormal pixel structure, the maximum displayable area is obtained; Wherein, the displayable area is a rectangular structure.

8. A display device, characterized in that: The device comprises a driving circuit and a display panel as claimed in any one of claims 1 to 3, wherein the driving circuit drives the display panel.

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