Display panel, display panel control method and display device

Abstract

The present application discloses a display panel, a control method of the display panel and a display device, wherein the display panel includes a first substrate and a second substrate arranged oppositely; the first substrate includes a first substrate, a data line, a scan line and a plurality of light-emitting elements, the data line, the scan line and the plurality of light-emitting elements are arranged on a side of the first substrate close to the second substrate, the data line and the scan line are arranged in a crisscross pattern and form a plurality of sub-pixel regions, the plurality of light-emitting elements are respectively located in the plurality of sub-pixel regions, an electrochromic structure is arranged between two adjacent light-emitting elements, the electrochromic structure is arranged on a side of the first substrate close to the second substrate, and the electrochromic structure is arranged in parallel with the data line and / or the scan line; wherein, when the display panel is working, the electrochromic structure is energized, and the transmittance of the electrochromic structure gradually decreases. Through the above design, it is avoided that the light emitted by the light-emitting elements corresponding to different regions interfere with each other, thereby avoiding the occurrence of the halo phenomenon.

Description

Technical Field

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

[0002] With the continuous development of the display industry, various technologies to improve display effects have emerged one after another. Among them, Mini LED (sub-millimeter light emitting diode) display technology has quickly become popular with its powerful advantages and has been widely used due to its higher resolution, contrast, color gamut and other characteristics.

[0003] However, since the viewing angle of Mini LED display is wide, a "halo" phenomenon will appear when displaying images with particularly high contrast, thus affecting the display effect. Therefore, how to solve the halo problem that occurs when Mini LED type display panels display images with high contrast has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present application is to provide a display panel, a control method for a display panel, and a display device to alleviate the halo problem of a MiniLED type display panel when displaying a high-contrast image.

[0005] The present application discloses a display panel, which includes a first substrate and a second substrate, wherein the first substrate and the second substrate are arranged opposite to each other; the first substrate includes a first substrate, a data line, a scan line and a plurality of light-emitting elements, wherein the data line, the scan line and the plurality of light-emitting elements are arranged on a side of the first substrate close to the second substrate, the data line and the scan line are arranged in a criss-cross pattern and form a plurality of sub-pixel regions, the plurality of light-emitting elements are respectively located in the plurality of sub-pixel regions, an electrochromic structure is arranged between two adjacent light-emitting elements, the electrochromic structure is arranged on a side of the first substrate close to the second substrate, and the electrochromic structure is arranged in parallel with the data line and / or the scan line; wherein, when the display panel is working, the electrochromic structure is energized and the light transmittance of the electrochromic structure gradually decreases.

[0006] Optionally, the light emitted by the light-emitting element is white light, and the second substrate also includes a second substrate, a color resist layer and a black matrix layer, the color resist layer and the black matrix layer are arranged on a side of the second substrate close to the first substrate, the color resist layer includes uniformly arranged color resists, and the black matrix in the black matrix layer is arranged between two adjacent color resists.

[0007] Optionally, the first substrate also includes an insulating layer, which is arranged between the electrochromic structure and the first substrate, and the thickness of the insulating layer is greater than or equal to the thickness of the scanning line, and the thickness of the insulating layer is greater than or equal to the thickness of the data line; the side of the electrochromic structure close to the first substrate is higher than the side of the scanning line and the data line away from the first substrate.

[0008] Optionally, the first substrate includes a main body and a raised portion, the raised portion is arranged on a side of the main body close to the second substrate, and the electrochromic structure is arranged on the raised portion, and the thickness of the raised portion is greater than or equal to the thickness of the scanning line, and the thickness of the raised portion is greater than or equal to the thickness of the data line.

[0009] Optionally, the material of the electrochromic structure is W 18 O 49 It is mixed with V2O5 material.

[0010] Optionally, one end of the electrochromic structure away from the first substrate is in contact with the second substrate, and the electrochromic structure includes a first sub-chromic structure, a second sub-chromic structure and a third sub-chromic structure, and the first sub-chromic structure, the second sub-chromic structure and the third sub-chromic structure are stacked in sequence along the direction from the first substrate to the second substrate; the W of the first sub-chromic structure 18 O 49 The ratio of W to V2O5 is 3:1; 18 O 49 The ratio of W to V2O5 is 3:2; 18 0 49 The ratio of V2O5 components is 3:5.

[0011] Optionally, the second substrate further includes an electrochromic structure, and the electrochromic structure is arranged on a side of the black matrix away from the second substrate.

[0012] Optionally, the electrochromic structures around the light-emitting element are connected to each other to form an electrochromic frame, and the electrochromic frame is connected to the corresponding scanning line.

[0013] The present application also discloses a control method for a display panel, the control method is used to control the display panel, the method comprises the steps of:

[0014] When the display panel is working, the electrochromic structure is energized, and the light transmittance of the electrochromic structure gradually decreases.

[0015] Optionally, when the display panel is working, the step of energizing the electrochromic structure so that the light transmittance of the electrochromic structure gradually decreases further includes:

[0016] Read the data of a frame of display image and obtain the grayscale difference between the high grayscale area and the low grayscale area;

[0017] It is determined whether the grayscale difference reaches a threshold value. If the grayscale difference is greater than or equal to the threshold value, the electrochromic structure between the high grayscale area and the low grayscale area is energized; if the grayscale difference is less than the threshold value, it is not energized.

[0018] The present application also discloses a display device, which includes a circuit board and the display panel described above, wherein the circuit board is electrically connected to the display panel.

[0019] Compared with the existing display panel that does not have an electrochromic structure to block the light emitted by the light-emitting element, the present application sets an electrochromic structure between two adjacent light-emitting elements and energizes the electrochromic structure when the display panel is working. The electrochromic structure changes from a transparent state to an opaque state, so that the electrochromic structure blocks the light emitted by the light-emitting element, thereby preventing the light emitted by the light-emitting elements corresponding to different areas from interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 is a schematic diagram of a display device of the present application;

[0022] Figure 2 is a schematic diagram of a display panel of a first embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a first substrate of a first embodiment of the present application;

[0024] Figure 4 is an enlarged schematic diagram of the electrochromic structure of the first embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a first substrate of a first embodiment of the present application;

[0026] Figure 6is a schematic diagram of a display panel of a second embodiment of the present application;

[0027] Figure 7 is a schematic diagram of a second substrate of a second embodiment of the present application;

[0028] Figure 8 is a schematic diagram of a display panel and a circuit board according to an embodiment of the present application;

[0029] Fig. 9 is a schematic diagram of step S1 of a method for controlling a display panel according to an embodiment of the present application;

[0030] Fig.10 is a schematic diagram of steps S11 and S12 of a method for controlling a display panel according to an embodiment of the present application.

[0031] Among them, 10, display device; 20, circuit board; 30, display panel; 300, first substrate; 320, first substrate; 321, main body; 322, raised portion; 330, data line; 340, scan line; 350, light-emitting element; 360, insulating layer; 370, electrochromic structure; 371, electrochromic frame; 381, first sub-chromic structure; 382, ​​second sub-chromic structure; 383, third sub-chromic structure; 400, second substrate; 410, second substrate; 421, color resistance; 431, black matrix; 510, timing controller; 520, data drive chip; 530, scan drive chip; 540, electrochromic structure drive chip; 550, algorithm controller. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0037] Figure 1 is a schematic diagram of a display device of the present application, such as Figure 1 As shown, the present application discloses a display device 10, which includes a circuit board 20 and a display panel 30, wherein the circuit board 20 is electrically connected to the display panel 30, and of course also includes an external packaging structure such as a housing.

[0038] The present application also discloses a display panel 30, wherein the display panel 30 is a Mini LED type display panel 30, and the display panel 30 is used in the above-mentioned display device 10. For the display panel 30, the present application provides the following design:

[0039] Embodiment 1:

[0040] Figure 2 is a schematic diagram of a display panel of the first embodiment of the present application, such as Figure 2 As shown, the display panel 30 disclosed in the present application includes a first substrate 300 and a second substrate 400 , and the first substrate 300 and the second substrate 400 are arranged opposite to each other.

[0041] The first substrate 300 can be understood as a backlight substrate. The first substrate 300 includes a first substrate 320, a data line 330, a scan line 340 and a plurality of light-emitting elements 350. The data line 330, the scan line 340 and the plurality of light-emitting elements 350 are arranged on a side of the first substrate 320 close to the second substrate 400. The data line 330 and the scan line 340 are arranged in a criss-cross pattern to form a plurality of sub-pixel regions. The plurality of light-emitting elements 350 are respectively located in the plurality of sub-pixel regions.

[0042] An electrochromic structure 370 is arranged between two adjacent light-emitting elements 350. The electrochromic structure 370 is arranged on a side of the first substrate 320 close to the second substrate 410, and the electrochromic structure 370 is arranged in parallel with the data line 330 and / or the scanning line 340, that is, the projection of the electrochromic structure 370 on the first substrate 320 does not overlap with the projection of the data line 330 and / or the scanning line 340 on the first substrate 320.

[0043] When the display panel 30 is working, the electrochromic structure 370 is energized so that the light transmittance of the electrochromic structure 370 is gradually reduced, that is, the transparent state is gradually changed to the opaque state, so as to block the light emitted by the light-emitting element 350.

[0044] Compared with the existing display panel 30 that does not have an electrochromic structure 370 to block the light emitted by the light-emitting element 350, the present application sets an electrochromic structure 370 between two adjacent light-emitting elements 350, and energizes the electrochromic structure 370 when the display panel 30 is working, so that the electrochromic structure 370 blocks the light emitted by the light-emitting element 350 to prevent the light emitted by the light-emitting elements 350 corresponding to different areas from interfering with each other. It is particularly obvious that when the display contrast of the displayed picture is high, the brightness of the light-emitting element 350 corresponding to the bright area of ​​the picture (relatively bright area) and the light-emitting element 350 corresponding to the dark area of ​​the picture (relatively dark or black area) are different. At this time, the electrochromic structure 370 can block the light emitted by the light-emitting element 350 corresponding to the bright area of ​​the picture to prevent the light emitted by the light-emitting element 350 corresponding to the bright area of ​​the picture from irradiating the position of the dark area of ​​the picture, thereby generating a halo phenomenon.

[0045] Moreover, the state of the electrochromic structure 370 of the present application can gradually change from a transparent state to an opaque state after being powered on, and the degree of transparency is different under different voltages, that is, the light transmittance is different. Therefore, the present application can also control the light transmittance of the electrochromic structure 370 by controlling the voltage. Compared with directly setting a black blocking material between two adjacent light-emitting elements 350, the present application can prevent the problem of dark lines appearing in the display screen when the contrast of the display screen is low by not powering the electrochromic structure 370 when the contrast of the display screen is low.

[0046] Moreover, the display panel 30 of the present application is a Mini LED type display panel 30, and the light-emitting element 350 is a light-emitting diode, which is directly connected to the scanning line 340 and the data line 330. Therefore, in order to prevent interference with the signals of the data line 330 and the scanning line 340 when the electrochromic structure 370 is energized, resulting in abnormal screen display, the electrochromic structure 370 of the present application is arranged in parallel with the data line 330 and / or the scanning line 340, thereby preventing the generation of capacitance.

[0047] Furthermore, the electrochromic structure 370 can be raised. In the first method, the insulating layer 360 is provided only under the electrochromic structure 370 to raise the electrochromic structure 370, so as to further prevent the capacitor from interfering with the data line 330 and the scan line 340. The specific design is as follows:

[0048] The first substrate 300 also includes an insulating layer 360, which is arranged between the electrochromic structure 370 and the first substrate 320, and the thickness of the insulating layer 360 is greater than or equal to the thickness of the scanning line 340, and the thickness of the insulating layer 360 is greater than or equal to the thickness of the data line 330; the side of the electrochromic structure 370 close to the first substrate 320 is higher than the side of the scanning line 340 and the data line 330 away from the first substrate 320.

[0049] The second method, such as Figure 3As shown, in order to prevent the light generated by the light-emitting element 350 from passing through the insulating layer 360, the second method is to set a protrusion on the first substrate 320 to raise the electrochromic structure 370, and the specific design is: the first substrate 320 includes a main body 321 and a protrusion 322, the protrusion 322 is arranged on the side of the main body 321 close to the second substrate 400, and the electrochromic structure 370 is arranged on the protrusion 322, and the thickness of the protrusion 322 is greater than or equal to the thickness of the scanning line 340, and the thickness of the protrusion 322 is greater than or equal to the thickness of the data line 330. It can not only prevent the electrochromic structure 370 from having a positive area with the scanning line 340 and / or the data line 330, but also prevent the light generated by the light-emitting element 350 from passing through the insulating layer 360 due to the setting of the insulating layer 360. Of course, the insulating layer 360 made of opaque material can also be used on the basis of the first method.

[0050] Among them, the material of the electrochromic structure 370 of the present application is W 18 O 49 Compared with the electrochromic structure 370 composed of a single oxide material, the present application adopts W 18 O 49 By mixing with V2O5 material, the electrochromic structure 370 can present a yellow opaque state and can also compensate for the yellow light on the display screen, so that only the light-emitting elements 350 of RGB three colors can be set to achieve the RGBY effect.

[0051] like Figure 4 As shown, and according to W 18 O 49 The light transmittance of the electrochromic structure 370 under the same voltage is different due to the different mixing ratios of the V2O5 materials. A further design of the present application is that the end of the electrochromic structure 370 away from the first substrate 320 is in contact with the second substrate 400, and the electrochromic structure 370 includes a first sub-color-changing structure 381, a second sub-color-changing structure 382 and a third sub-color-changing structure 383. In the direction from the first substrate 300 to the second substrate 400, the first sub-color-changing structure 381, the second sub-color-changing structure 382 and the third sub-color-changing structure 383 are stacked in sequence, and the W of the first sub-color-changing structure 381 is 18 O 49 and V2O5 components in a ratio of 3:1; the W of the second sub-color-changing structure 382 18 O 49 and V2O5 components in a ratio of 3:2; the W of the third sub-color-changing structure 383 18 0 49 The ratio of V2O5 components is 3:5.

[0052] Among them, W 18 O 49 The component ratio of V2O5 is 3:1 to 3:2 and then to 3:5. After applying the same voltage, the depth of the yellow color is continuously reduced, that is, although it is all yellow, the transmittance is continuously increasing. Therefore, the scheme of the present application achieves the effect of gradually increasing the transmittance of the electrochromic structure 370 from the first substrate 320 to the second substrate 400 under the same voltage.

[0053] Firstly, since the light-emitting diode has a wide viewing angle, a darker component ratio is used on the side close to the first substrate 320, that is, the bottom of the electrochromic structure 370, and the corresponding light transmittance is lower, which can effectively prevent large-angle light from jumping to other areas; secondly, a lighter component ratio is used on the side close to the second substrate 400, that is, the top of the electrochromic structure 370, and the corresponding light transmittance is higher, which avoids the electrochromic structure 370 from completely blocking the light, and can prevent the problem of dark lines in the display screen.

[0054] like Figure 5 As shown, the electrochromic structures 370 around the light-emitting element 350 of the present application are connected to each other to form an electrochromic frame 371, and the electrochromic frame 371 is connected to the corresponding scanning line 340. That is, the electrochromic frame 371 and the light-emitting element 350 surrounded by the electrochromic frame 371 are connected to the same scanning line 340, so that when the light-emitting element 350 is lit, the electrochromic structure 370 becomes an opaque state, and when the light-emitting element 350 is extinguished, the electrochromic structure 370 becomes a transparent state again, and no separate circuit is required to control the electrochromic structure 370.

[0055] Embodiment 2:

[0056] Figure 6 is a schematic diagram of a display panel of a second embodiment of the present application, such as Figure 6 As shown, the difference between the second embodiment and the first embodiment is that the first embodiment is a direct display type Mini LED display panel 30, that is, the light emitting element 350 directly emits three kinds of RGB light; while the light emitted by the light emitting element 350 in the second embodiment is white light, and a color resistance layer is arranged on the second substrate 400. Specifically, the light emitted by the light emitting element 350 is white light, and the second substrate 400 further includes a second substrate 410, a color resistance layer and a black matrix layer, the color resistance layer and the black matrix layer are arranged on the side of the second substrate 410 close to the first substrate 300, the color resistance layer includes uniformly arranged color resistance 421, and the black matrix 431 in the black matrix layer is arranged between two adjacent color resistances 421.

[0057] Further, such as Figure 7 As shown, in this embodiment, the electrochromic structure 370 can also be arranged on the black matrix 431, arranged on the side of the black matrix 431 away from the second substrate 410, and the electrochromic structure 370 is connected to the black matrix. It is not necessary to make the black matrix 431 thick to block the final emitted light and further avoid the halo phenomenon.

[0058] Combination Figure 8 and Fig. 9 As shown, the present application also discloses a control method of a display panel 30, the control method is used to control the electrochromic structure 370 in the display panel 30, the method comprising the steps of:

[0059] S1: When the display panel is working, the electrochromic structure is energized, and the light transmittance of the electrochromic structure gradually decreases.

[0060] Among them, the circuit board 20 is provided with structures such as a data driving chip 520, a scanning driving chip 530, an electrochromic structure driving chip 540, and a timing controller 510. The data driving chip 520 is connected to the data line 330, the scanning driving chip 530 is connected to the scanning line 340, and the electrochromic structure driving chip 540 is connected to the electrochromic structure 370. The timing controller 510 is connected to the data driving chip 520, the scanning driving chip 530, and the electrochromic structure driving chip 540.

[0061] When the display panel 30 is displaying, the timing controller 510 outputs a signal to control the electrochromic structure driving chip 540 to energize the electrochromic structure 370, so that the state of the electrochromic structure 370 gradually changes from a transparent state to an opaque state, achieving an effect of gradually reducing the transmittance.

[0062] Further, such as Fig.10 As shown, when the display panel is working, the step of energizing the electrochromic structure and gradually reducing the light transmittance of the electrochromic structure further includes:

[0063] S11: Read data of a frame of display image to obtain the grayscale difference between the high grayscale area and the low grayscale area;

[0064] S12: Determine whether the grayscale difference reaches a threshold value. If the grayscale difference is greater than or equal to the threshold value, control the electrochromic structure between the high grayscale area and the low grayscale area to be energized; if the grayscale difference is less than the threshold value, de-energize.

[0065] Among them, an algorithm controller 550 is set on the circuit board 20, and the algorithm controller 550 is connected to the electrochromic structure driving chip 540. The signal in the timing controller 510 is obtained through the algorithm controller 550 to determine whether the grayscale difference reaches the threshold. The threshold is preferably 205. For example, when the grayscale of the high grayscale area is greater than 225 and the grayscale of the low grayscale area is less than 20, it is determined that the threshold is reached, and the electrochromic structure 370 between the high grayscale area and the low grayscale area is energized.

[0066] Thus, only the electrochromic structure 370 between the two screen areas of high grayscale and low grayscale is powered on. Firstly, in a large display panel, it is not necessary to power on the entire electrochromic structure 540, which saves a lot of energy; secondly, some display screens may have areas with large grayscale differences and areas with small grayscale differences at the same time. The solution of the present application can avoid the problem of dark lines in the area where the grayscale transition is not obvious, and improve the brightness of the area where the grayscale difference is not obvious.

[0067] 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.

[0068] 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.

[0069] 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 first substrate and a second substrate, the first substrate and the second substrate are arranged opposite to each other; the first substrate comprises a first substrate, a data line, a scan line and a plurality of light-emitting elements, the data line, the scan line and the plurality of light-emitting elements are arranged on a side of the first substrate close to the second substrate, the data line and the scan line are arranged in a crisscross pattern to form a plurality of sub-pixel regions, the plurality of light-emitting elements are respectively located in the plurality of sub-pixel regions, characterized in that: An electrochromic structure is arranged between two adjacent light-emitting elements, the electrochromic structure is arranged on a side of the first substrate close to the second substrate, and the electrochromic structure is arranged in parallel with the data line and / or the scan line; Among them, when the display panel is working, the electrochromic structure is energized and the transmittance of the electrochromic structure gradually decreases; the first substrate also includes an insulating layer, which is arranged between the electrochromic structure and the first substrate, and the thickness of the insulating layer is greater than or equal to the thickness of the scanning line, and the thickness of the insulating layer is greater than or equal to the thickness of the data line; the side of the electrochromic structure close to the first substrate is higher than the side of the scanning line and the data line away from the first substrate.

2. The display panel according to claim 1, characterized in that: The light emitted by the light-emitting element is white light. The second substrate also includes a second substrate, a color resist layer and a black matrix layer. The color resist layer and the black matrix layer are arranged on a side of the second substrate close to the first substrate. The color resist layer includes uniformly arranged color resists, and the black matrix in the black matrix layer is arranged between two adjacent color resists.

3. The display panel according to claim 1, characterized in that: The material of the electrochromic structure is W 18 O 49 It is mixed with V2O5 material.

4. The display panel according to claim 2, characterized in that: The second substrate further includes an electrochromic structure, and the electrochromic structure is arranged on a side of the black matrix away from the second substrate.

5. The display panel according to claim 1, characterized in that: The electrochromic structures around the light-emitting element are connected to each other to form an electrochromic frame, and the electrochromic frame is connected to the corresponding scanning line.

6. A display panel, comprising a first substrate and a second substrate, the first substrate and the second substrate are arranged opposite to each other; the first substrate comprises a first substrate, a data line, a scan line and a plurality of light-emitting elements, the data line, the scan line and the plurality of light-emitting elements are arranged on a side of the first substrate close to the second substrate, the data line and the scan line are arranged in a crisscross pattern to form a plurality of sub-pixel regions, the plurality of light-emitting elements are respectively located in the plurality of sub-pixel regions, characterized in that: An electrochromic structure is arranged between two adjacent light-emitting elements, the electrochromic structure is arranged on a side of the first substrate close to the second substrate, and the electrochromic structure is arranged in parallel with the data line and / or the scan line; Wherein, when the display panel is working, the electrochromic structure is energized, and the light transmittance of the electrochromic structure gradually decreases; One end of the electrochromic structure away from the first substrate is in contact with the second substrate, the electrochromic structure comprises a first sub-chromic structure, a second sub-chromic structure and a third sub-chromic structure, and the first sub-chromic structure, the second sub-chromic structure and the third sub-chromic structure are stacked in sequence in a direction from the first substrate to the second substrate; The W of the first sub-color-changing structure 18 O 49 The ratio of W to V2O5 is 3:1; 18 O 49 The ratio of W to V2O5 is 3:2; 18 0 49 The ratio of V2O5 components is 3:

5.

7. A method for controlling a display panel, characterized in that: The control method is used to control the display panel according to any one of claims 1 to 6, and the method comprises the steps of: When the display panel is working, the electrochromic structure is energized, and the light transmittance of the electrochromic structure gradually decreases.

8. The control method of the display panel according to claim 7, characterized in that: When the display panel is working, the step of energizing the electrochromic structure so that the light transmittance of the electrochromic structure gradually decreases further comprises: Read the data of a frame of display image and obtain the grayscale difference between the high grayscale area and the low grayscale area; It is determined whether the grayscale difference reaches a threshold value. If the grayscale difference is greater than or equal to the threshold value, the electrochromic structure between the high grayscale area and the low grayscale area is energized; if the grayscale difference is less than the threshold value, it is not energized.

9. A display device, characterized in that: The display device comprises a circuit board and a display panel as claimed in any one of claims 1 to 6, wherein the circuit board is electrically connected to the display panel.

Images