Display panel, driving method of display panel and wearable device

Abstract

The invention relates to a display panel, a driving method of the display panel and wearable equipment. The display panel comprises a substrate; the electronic paper layer is positioned on one side of the substrate; the electrochromic layer is positioned on one side, far away from the substrate, of the electronic paper layer; the transparent display layer is located on the side, away from the substrate, of the electrochromic layer; wherein the display panel comprises a first display state and a second display state, and in the first display state, the electronic paper layer is in a working state, and the electrochromic layer and the transparent display layer are in a non-working state; in the second display state, the electrochromic layer and the transparent display layer are in a working state, and the electronic paper layer is in a non-working state. The power consumption of the display panel is low.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel, a driving method for the display panel, and a wearable device. Background Art

[0002] As an important part of the information industry, display technologies have played an important role in the development of information technologies. With the development of display technologies, display panels such as organic light-emitting diode display panels have been widely used.

[0003] However, the power consumption of display panels in related technologies is relatively high. Summary of the Invention

[0004] Based on this, it is necessary to provide a display panel, a driving method for the display panel, and a wearable device, aiming to reduce the power consumption of the display panel.

[0005] In a first aspect, an embodiment of this application provides a display panel, including:

[0006] A substrate;

[0007] An electronic paper layer located on one side of the substrate;

[0008] An electrochromic layer located on the side of the electronic paper layer away from the substrate;

[0009] A transparent display layer located on the side of the electrochromic layer away from the substrate;

[0010] Wherein, the display panel includes a first display state and a second display state. In the first display state, the electronic paper layer is in a working state, and the electrochromic layer and the transparent display layer are in a non-working state; in the second display state, the electrochromic layer and the transparent display layer are in a working state, and the electronic paper layer is in a non-working state.

[0011] In a second aspect, an embodiment of this application further provides a driving method for a display panel, characterized in that it is applied to the display panel in the first aspect; the method includes:

[0012] Obtaining ambient brightness data;

[0013] When the ambient brightness data is greater than or equal to a preset brightness threshold, controlling the electronic paper layer to be in a working state, and controlling the electrochromic layer and the transparent display layer to be in a non-working state;

[0014] When the ambient brightness data is less than the preset brightness threshold, controlling the electrochromic layer and the transparent display layer to be in a working state, and controlling the electronic paper layer to be in a non-working state.

[0015] In a third aspect, an embodiment of the present application further provides a wearable device, including the display panel of the first aspect.

[0016] The display panel provided by the embodiment of the present application includes a substrate, an electronic paper layer, an electrochromic layer, and a transparent display layer. The electronic paper layer is located on one side of the substrate, the electrochromic layer is located on the side of the electronic paper layer away from the substrate, and the transparent display layer is located on the side of the electrochromic layer away from the substrate. The display panel of the present application has a first display state and a second display state. In the first display state, the electronic paper layer is in a working state, and the electrochromic layer and the transparent display layer are in a non-working state; in the second display state, the electrochromic layer and the transparent display layer are in a working state, and the electronic paper layer is in a non-working state. Since the power consumption of the electronic paper when displaying a picture is relatively low, when the external environment is relatively bright, the display panel of the present application can be in the first display state, and the picture is displayed through the electronic paper layer with relatively low power consumption. When the external environment is relatively dark, the display panel of the present application is in the second display state, and the picture is displayed through the transparent display layer with relatively high power consumption. In this way, it is possible to prevent the display panel from being in a working state with relatively high power consumption for a long time, and the power consumption of the display panel can be reduced. Description of the Drawings

[0017] Figure 1 It is a cross-sectional schematic diagram of a display panel provided by an embodiment of the present application;

[0018] Figure 2 It is a cross-sectional schematic diagram of another display panel provided by an embodiment of the present application;

[0019] Figure 3 [[ID=I18]]It is a plan schematic diagram of a transparent display layer in a display panel provided by an embodiment of the present application;

[0020] Figure 4 It is a plan schematic diagram of an electronic paper layer in a display panel provided by an embodiment of the present application;

[0021] Figure 5 It is a cross-sectional schematic diagram of still another display panel provided by an embodiment of the present application;

[0022] Figure 6 It is a cross-sectional schematic diagram of yet another display panel provided by an embodiment of the present application;

[0023] Figure 7 It is a cross-sectional schematic diagram of yet another display panel provided by an embodiment of the present application;

[0024] Figure 8 It is a plan schematic diagram of a display panel provided by an embodiment of the present application;

[0025] Figure 9 It is a cross-sectional schematic diagram of yet another display panel provided by an embodiment of the present application;

[0026] Figure 10 This is a schematic flowchart of a driving method for a display panel provided by an embodiment of the present application.

[0027] Explanation of reference numerals: 10 - substrate, 20 - electronic paper layer, 21 - first pixel unit, 211 - first red sub - pixel, 212 - first blue sub - pixel, 213 - first green sub - pixel, 22 - filling structure, 201 - driving array layer, 202 - electronic ink sac layer, 203 - color filter layer, 30 - electrochromic layer, 40 - transparent display layer, 41 - second red sub - pixel, 411 - transparent sub - pixel, 412 - second red sub - pixel, 413 - second blue sub - pixel, 414 - second green sub - pixel, 50 - touch control layer, 60 - cover plate. Detailed implementation manners

[0028] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant attached drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] When describing the positional relationship, unless otherwise specified, when an element such as a layer, film or substrate is referred to as being "on" another element, it can be directly on the other element or there can also be an intermediate element. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more intermediate elements. It can also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can also be one or more intermediate elements.

[0031] In the case of using "including", "having", and "comprising" described herein, unless a clear limiting term such as "only", "consisting of", etc. is used, another component can also be added. Unless otherwise mentioned, the singular form of a term can include the plural form and should not be understood as having a quantity of one.

[0032] It should be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element.

[0033] It should also be understood that when interpreting an element, although not explicitly described, the element is interpreted to include an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximate" or "substantially" may mean within one or more standard deviations, which is not limited herein.

[0034] In addition, in the specification, the phrase "schematic diagram of planar distribution" refers to the drawing when observing the target part from above, and the phrase "schematic sectional view" refers to the drawing when observing the section taken by vertically cutting the target part from the side.

[0035] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the various elements are only drawn by way of example in the drawings and not necessarily to the true scale.

[0036] As described in the background art section, there is a problem in the display panel in the related art that the power consumption is relatively high, resulting in poor battery life of the display device. The inventor found that the reason for the above phenomenon is that the polarizer or CF film of the OLED screen affects the panel transmittance, resulting in a decrease in the light-emitting efficiency of the OLED device, an increase in the panel power consumption, and a decrease in the battery life of the display device. In addition, since the battery of the wearable display device is relatively small, it will further result in poor battery life.

[0037] Based on the above technical problems, the inventors have studied and found that a display layer with lower power consumption can be used in the display panel to improve the battery life of the display panel. Based on this, the inventors have further developed the technical solution of the embodiments of the present application. Specifically, the display panel provided by the embodiments of the present application includes: a substrate; an electronic paper layer located on one side of the substrate; an electrochromic layer located on the side of the electronic paper layer away from the substrate; a transparent display layer located on the side of the electrochromic layer away from the substrate; wherein, the display panel includes a first display state and a second display state. In the first display state, the electronic paper layer is in a working state, and the electrochromic layer and the transparent display layer are in a non-working state; in the second display state, the electrochromic layer and the transparent display layer are in a working state, and the electronic paper layer is in a non-working state. By adopting the above technical solution, when the external environment is relatively bright, the picture is displayed through the electronic paper layer with lower power consumption, and when the external environment is relatively dark, the picture is displayed through the transparent display layer with higher power consumption. In this way, it is possible to avoid the display panel being in a working state with higher power consumption for a long time, reduce the power consumption of the display panel, and improve the battery life of the wearable display device.

[0038] The above is the core idea of the present application. Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present application.

[0039] In an exemplary embodiment, please refer to Figure 1 , the present application provides a display panel. The display panel of the present application includes: a substrate 10, an electronic paper layer 20, an electrochromic layer 30, and a transparent display layer 40. Among them, the electronic paper layer 20 is located on one side of the substrate 10, the electrochromic layer 30 is located on the side of the electronic paper layer 20 away from the substrate 10, and the transparent display layer 40 is located on the side of the electrochromic layer 30 away from the substrate 10.

[0040] In application, the display panel of the present application has a first display state and a second display state. In the first display state, the electronic paper layer 20 is in a working state, and the electrochromic layer 30 and the transparent display layer 40 are in a non-working state; in the second display state, the electrochromic layer 30 and the transparent display layer 40 are in a working state, and the electronic paper layer 20 is in a non-working state.

[0041] It can be understood that electronic paper is a display that coats electronic ink on a layer of plastic film, which can be attached to a thin-film transistor (TFT / PET / FPC, etc.) circuit and forms a pixel pattern under the control of a driving IC. Due to the very high reflectivity and contrast of electronic paper, electronic paper can reflect external light like ordinary paper. In an environment with sufficient light, electronic paper does not require backlight or self-luminescence at all, so the power consumption of electronic paper is very low.

[0042] Therefore, in the present application, when the light in the external environment is sufficient, the display panel of the present application can use the electronic paper layer 20 for screen display. Specifically, power can be supplied to the electronic paper layer 20 to drive the electronic paper layer 20 to display dynamic or static images. In order to make the images displayed by the electronic paper layer 20 visible to the human eye, when using the electronic paper layer 20 for screen display, the electrochromic layer 30 and the transparent display layer 40 can be controlled to be in a non-operating state. When the electrochromic layer 30 and the transparent display layer 40 are in a non-operating state, both the electrochromic layer 30 and the transparent display layer 40 are in a transparent state, so that the images displayed by the electronic paper layer 20 can pass through the electrochromic layer 30 and the transparent display layer 40 and be seen by the human eye.

[0043] In the application, when the light in the external environment changes from sufficient to insufficient, the display panel of the present application can switch from using the electronic paper layer 20 for screen display to using the transparent display layer 40 for screen display. Specifically, power supply to the electronic paper layer 20 can be stopped, and the image displayed by the electronic paper layer 20 at the moment immediately before stopping power supply remains unchanged during the process of using the transparent display layer 40 for screen display. In order to prevent the image of the electronic paper layer 20 from affecting the screen display of the transparent display layer 40, the electrochromic layer 30 can be controlled to be in an operating state, that is, the electrochromic layer 30 can be in a black state, so that the electrochromic layer 30 blocks the image of the electronic paper layer 20, and thus the image displayed by the transparent display layer 40 can be clearly seen by the human eye. Therefore, when the display panel of the present application is in a constantly-on operating state, by switching the display state of the display panel according to the change of the light in the external environment, the power consumption of the display panel can be reduced.

[0044] The display panel provided by the embodiment of the present application includes a substrate, an electronic paper layer, an electrochromic layer, and a transparent display layer. The electronic paper layer is located on one side of the substrate, the electrochromic layer is located on the side of the electronic paper layer away from the substrate, and the transparent display layer is located on the side of the electrochromic layer away from the substrate. The display panel of the present application has a first display state and a second display state. In the first display state, the electronic paper layer is in an operating state, and the electrochromic layer and the transparent display layer are in a non-operating state; in the second display state, the electrochromic layer and the transparent display layer are in an operating state, and the electronic paper layer is in a non-operating state. Since the power consumption of the electronic paper when displaying images is relatively low, when the external environment is relatively bright, the display panel of the present application can be in the first display state and display images through the electronic paper layer with relatively low power consumption. When the external environment is relatively dark, the display panel of the present application is in the second display state and displays images through the transparent display layer with relatively high power consumption. In this way, it is possible to prevent the display panel from being in a high-power consumption operating state for a long time and reduce the power consumption of the display panel.

[0045] In an exemplary embodiment, the working state of the electrochromic layer 30 includes a black state, and the non-working state includes a transparent state; the electronic paper layer 20 is in a working state when powered on and in a non-working state when not powered on.

[0046] It can be understood that electrochromism is a phenomenon in which the optical properties (reflectivity, transmittance, absorptivity, etc.) of a material undergo stable and reversible color changes under the action of an external electric field, and it appears as reversible changes in color and transparency on the appearance. Materials with electrochromic properties are called electrochromic materials, and the electrochromic layer 30 in the display panel of the present application is a film layer prepared from electrochromic materials. In one example, the electrochromic layer 30 of the present application can be in a transparent state when not powered on and in a black state when powered on; alternatively, the electrochromic layer 30 of the present application can be in a black state when not powered on and in a transparent state when powered on.

[0047] The electronic paper layer 20 of the present application can receive power supply in the working state to change the displayed picture of the electronic paper layer 20. When the display panel switches to using the transparent display layer 40 to display the picture, the present application does not need to supply power to the electronic paper layer 20 to drive the electronic paper layer 20 to display a full black picture, but can directly stop supplying power to the electronic paper layer 20, so that the electronic paper layer 20 maintains the picture displayed before power-off until the display panel switches back to using the electronic paper layer 20 to display the picture, and the electronic paper layer 20 receives power supply again to change the displayed picture.

[0048] In an exemplary embodiment, please refer to Figure 2 、 Figure 3 and Figure 4 ,the electronic paper layer 20 includes a plurality of first pixel units 21, the transparent display layer 40 includes a plurality of second pixel units 41, and the second pixel units 41 include transparent sub-pixels 411 and at least one color sub-pixel. Among them, the orthographic projection of the first pixel unit 21 on the target plane overlaps at least partially with the orthographic projection of the transparent sub-pixel 411 in the corresponding second pixel unit 41 on the target plane, and the target plane can be the plane where the substrate 10 is located.

[0049] In this embodiment, the first pixel unit 21 may include a first red sub-pixel 211, a first blue sub-pixel 212, and a first green sub-pixel 213. At least one color sub-pixel in the second pixel unit 41 may include a second red sub-pixel 412, a second blue sub-pixel 413, and a second green sub-pixel 414. The electronic paper layer 20 includes a plurality of first pixel units 21, for example, it may include the first pixel unit 21-1 and the first pixel unit 21-2. The transparent display layer 40 includes a plurality of second pixel units 41, for example, it may include the second pixel unit 41-1 and the second pixel unit 41-2. The second pixel unit 41 includes a second red sub-pixel 412, a second blue sub-pixel 413, a second green sub-pixel 414, and a transparent sub-pixel 411. The orthographic projection of the first pixel unit 21-1 on the target plane overlaps with the orthographic projection of the second pixel unit 41-1 on the target plane, and the orthographic projection of the first pixel unit 21-2 on the target plane overlaps with the orthographic projection of the second pixel unit 41-2 on the target plane.

[0050] In one example, please refer to Figure 3 and Figure 4 , Figure 3 which is a schematic diagram of the arrangement of the second pixel units 41 on the transparent display layer 40 in one example. Figure 4 which is a schematic diagram of the arrangement of the first pixel units 21 on the electronic paper layer 20 in one example. Referring to Figure 3 and Figure 4 it can be seen that the orthographic projection of each first pixel unit 21 on the target plane overlaps with the orthographic projection of the corresponding second pixel unit 41 on the target plane. Specifically, in this example, the orthographic projections of the first red sub-pixel 211 and the first blue sub-pixel 212 in each first pixel unit 21 on the target plane overlap with the orthographic projection of the transparent sub-pixel 411 in the corresponding second pixel unit 41 on the target plane, and the orthographic projection of the first green sub-pixel 213 in each first pixel unit 21 on the target plane overlaps with the orthographic projections of the second red sub-pixel 412, the second blue sub-pixel 413, and the second green sub-pixel 414 in the corresponding second pixel unit 41 on the target plane. It can be understood that the arrangement methods of the first pixel units 21 on the electronic paper layer 20 and the second pixel units 41 on the transparent display layer 40 shown above are only examples. In applications, the arrangement methods of the first pixel units 21 on the electronic paper layer 20 and the second pixel units 41 on the transparent display layer 40 are not limited to this. The arrangement methods of the first pixel unit 21 and the second pixel unit 41 shown in this application are only for illustrative purposes.

[0051] In an exemplary embodiment, please refer to Figure 5, the orthographic projections of each first pixel unit 21 on the target plane respectively overlap with the orthographic projections of the transparent sub-pixels 411 in each second pixel unit 41 on the target plane.

[0052] In an application, since the transmittance of the color sub-pixels is lower than that of the transparent sub-pixels, if the orthographic projection of the first pixel unit 21 on the target plane overlaps with the orthographic projection of the color sub-pixel 411 in the second pixel unit 41 on the target plane, the color sub-pixels in the second pixel unit 41 may affect the clarity of the display of the electronic paper layer 20 to a certain extent. Therefore, in one example, please refer to Figure 3 , in the present application, the orthographic projections of each first pixel unit 21 on the target plane can respectively overlap with the orthographic projections of the transparent sub-pixels 411 in each second pixel unit 41 on the target plane. A plurality of filling structures 22 can be provided in the electronic paper layer 20, and the orthographic projections of each filling structure 22 on the target plane can respectively overlap with the orthographic projections of the color sub-pixels in each second pixel unit 41 on the target plane. By correspondingly arranging each first pixel unit 21 with each transparent sub-pixel, when the display panel is in the first display state, the picture displayed by the electronic paper layer 20 can be clearly seen by the human eye through the transparent sub-pixels with higher transparency.

[0053] In an exemplary embodiment, please refer to Figure 6 , the orthographic projections of some first pixel units 21 on the target plane respectively overlap with the orthographic projections of the transparent sub-pixels 411 in each second pixel unit 41 on the target plane; the orthographic projections of the remaining first pixel units 21 on the target plane respectively overlap with the orthographic projections of the color sub-pixels in each second pixel unit 41 on the target plane.

[0054] In an application, in order to improve the resolution of the picture displayed by the electronic paper layer 20 and at the same time take into account the clarity of the picture displayed by the electronic paper layer 20, the number of first pixel units 21 in the electronic paper layer 20 can be set to be twice the number of second pixel units 41 in the transparent display layer 40. Set the orthographic projections of some first pixel units 21 on the target plane to respectively overlap with the orthographic projections of each transparent sub-pixel 411 on the target plane. When the display panel is in the first display state, the picture displayed by this part of the first pixel units 21 can be clearly seen by the human eye through the transparent sub-pixels with higher transparency; the orthographic projections of the other part of the first pixel units 21 on the target plane respectively overlap with the orthographic projections of the color sub-pixels in each second pixel unit 41 on the target plane. This part of the first pixel units 21 and the first pixel units 21 corresponding to the transparent sub-pixels 411 jointly perform picture display, which can improve the resolution of the picture displayed by the electronic paper layer 20.

[0055] In an exemplary embodiment, please refer to Figure 7, the electronic paper layer 20 includes: a driving array layer 201, an electronic ink sac layer 202, and a color filter layer 203.

[0056] The driving array layer 201 is located on one side of the substrate 10. The electronic ink sac layer 202 is located on the side of the driving array layer 201 away from the substrate 10. The color filter layer 203 is located on the side of the electronic ink sac layer 202 away from the substrate 10. Among them, the color filter layer 203 includes a plurality of filter units, and each filter unit includes at least one color filter, and the filter units correspond to the first pixel units one by one.

[0057] Among them, the electronic ink sac layer 202 is composed of a plurality of microcapsules, and the size of the microcapsules is approximately equivalent to the diameter of human hair. Each microcapsule contains electrophoretic particles - negatively charged white particles and positively charged black particles, suspended in a transparent liquid. Using the principle of positive and negative attraction, when the electric field is turned on, the corresponding black or white particles in this area will move to the top of the microcapsule, and the user can see white or black on this area.

[0058] In this embodiment, the number of filter units in the color filter layer 203 is the same as the number of the first pixel units 21 in the electronic paper layer 20. At least one color filter may include a red filter, a blue filter, and a green filter. Each red filter and the microcapsule below the red filter together form a first red sub-pixel 211, each blue filter and the microcapsule below the blue filter together form a first blue sub-pixel 212, and each green filter and the microcapsule below the green filter together form a first green sub-pixel 213.

[0059] In an exemplary embodiment, please refer to Figure 8 , the display panel includes a display area AA and at least a non-display area NA surrounding the display area; the display panel further includes a plurality of pixel circuits and an electrochromic control circuit. The pixel circuits and the electrochromic control circuit are both located in the non-display area. The pixel circuits are connected to the transparent display layer 40 for supplying power to the transparent display layer 40, and the electrochromic control circuit is connected to the electrochromic layer 30 for supplying power to the electrochromic layer 30.

[0060] In an application, the non-display area includes a border area NA1 located outside the display area and a bonding area NA2 located on one side of the display area. To improve the transmittance of the transparent display layer 40, pixel circuits for driving each sub-pixel in the transparent display layer 40 can be disposed in the border area NA1. Each pixel circuit is respectively connected to each sub-pixel in the transparent display layer 40 in one-to-one correspondence, and is used to drive each sub-pixel to emit light when the display panel is in the second display state. And an electrochromic control circuit is disposed in the border area NA1. The electrochromic control circuit is connected to the electrochromic layer 30 and is used to control the electrochromic layer 30 to be in a transparent state or a black state according to whether the display panel is in the first display state or the second display state.

[0061] It can be understood that the display panel may further include devices such as a DDIC (Display Driver Integrated Circuit) and an FPC (Flexible Printed Circuit). These devices can be disposed in the bonding area NA2.

[0062] In an exemplary embodiment, please refer to Figure 9 , the display panel further includes a touch layer 50 and a cover plate 60. The touch layer 50 is located on the side of the transparent display layer 40 away from the substrate 10; the cover plate 60 is located on the side of the touch layer 50 away from the substrate 10.

[0063] In an application, when the display panel further includes a touch layer 50, the display panel further includes a touch chip, and the touch chip is disposed in the bonding area NA2.

[0064] In an exemplary embodiment, please refer to Figure 10 , the present application provides a driving method for a display panel, which is applied to the display panel in any of the above embodiments; the driving method of the display panel of the present application includes step S1001 to step S1003.

[0065] S1001: Obtain ambient brightness data.

[0066] In this embodiment, the display panel further includes an ambient light sensor, and the ambient light sensor can sense the surrounding light conditions and obtain the ambient brightness data.

[0067] S1002: When the ambient brightness data is greater than or equal to a preset brightness threshold, control the electronic paper layer to be in a working state, and control the electrochromic layer and the transparent display layer to be in a non-working state.

[0068] In the application, when the ambient brightness data is greater than or equal to the preset brightness threshold, indicating that the light in the external environment is sufficient, the display panel of the present application can use the electronic paper layer 20 for screen display. Specifically, power can be supplied to the electronic paper layer 20 to drive the electronic paper layer 20 to display dynamic or static images. In order to make the images displayed by the electronic paper layer 20 visible to the human eye, when using the electronic paper layer 20 for screen display, the electrochromic layer 30 and the transparent display layer 40 can be controlled to be in a non-working state. When the electrochromic layer 30 and the transparent display layer 40 are in a non-working state, both the electrochromic layer 30 and the transparent display layer 40 are in a transparent state, so that the images displayed by the electronic paper layer 20 can pass through the electrochromic layer 30 and the transparent display layer 40 and be seen by the human eye.

[0069] S1003: When the ambient brightness data is less than the preset brightness threshold, control the electrochromic layer and the transparent display layer to be in a working state, and control the electronic paper layer to be in a non-working state.

[0070] When the ambient brightness data is less than the preset brightness threshold, indicating that the light in the external environment changes from sufficient to insufficient, the display panel of the present application can switch from using the electronic paper layer 20 for screen display to using the transparent display layer 40 for screen display. Specifically, power supply to the electronic paper layer 20 can be stopped, and the image displayed by the electronic paper layer 20 at the moment before stopping power supply remains unchanged during the process of using the transparent display layer 40 for screen display. In order to prevent the image of the electronic paper layer 20 from affecting the screen display of the transparent display layer 40, the electrochromic layer 30 can be controlled to be in a working state, that is, the electrochromic layer 30 can be in a black state, so that the electrochromic layer 30 blocks the image of the electronic paper layer 20, and then the image displayed by the transparent display layer 40 can be clearly seen by the human eye. Therefore, when the display panel of the present application is in a constantly lit working state, by switching the display state of the display panel according to the change of the light in the external environment, the power consumption of the display panel can be reduced.

[0071] In a detailed embodiment, the display panel of the present application includes an ambient light sensor, a substrate 10, an electronic paper layer 20, an electrochromic layer 30, a transparent display layer 40, a touch layer 50, and a cover plate 60. The ambient light sensor can be disposed at any position in the display panel as needed, as long as it can detect the ambient brightness data. The electronic paper layer 20 includes a plurality of first pixel units 21. Each first pixel unit 21 may include a first red sub-pixel 211, a first blue sub-pixel 212, and a first green sub-pixel 213. Each second pixel unit 41 may include a transparent sub-pixel 411, a second red sub-pixel 412, a second blue sub-pixel 413, and a second green sub-pixel 414. When the ambient brightness data is greater than or equal to a preset brightness threshold, indicating that the light in the external environment is sufficient, both the electrochromic layer 30 and the transparent display layer 40 are in a transparent state, and the electronic paper layer 20 displays a dynamic or static image. When the ambient brightness data is less than the preset brightness threshold, indicating that the light in the external environment changes from sufficient to insufficient, the electrochromic layer 30 is in a black state to block the image of the electronic paper layer 20, and the transparent display layer 40 displays a dynamic or static image. The display panel of the present application can switch the display state of the display panel according to the change of the light in the external environment. When the light in the external environment is sufficient, the lower-power-consuming electronic paper layer 20 is used to display the image, avoiding the display panel being in a high-power-consuming working state for a long time, and reducing the power consumption of the display panel.

[0072] Based on the same inventive concept, an embodiment of the present application also provides a wearable device. The wearable device includes the display panel in any of the above embodiments. Therefore, the wearable device also has the beneficial effects of the display panel in the above embodiments. The same parts can be understood by referring to the explanation of the display panel above, and will not be repeated below.

[0073] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0074] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A display panel, characterized in that, Comprising: A substrate; An electronic paper layer located on one side of the substrate; An electrochromic layer located on the side of the electronic paper layer away from the substrate; A transparent display layer located on the side of the electrochromic layer away from the substrate; Wherein, the display panel includes a first display state and a second display state. In the first display state, the electronic paper layer is in a working state, and the electrochromic layer and the transparent display layer are in a non-working state; In the second display state, the electrochromic layer and the transparent display layer are in a working state, and the electronic paper layer is in a non-working state.

2. The display panel according to claim 1, wherein The working state of the electrochromic layer includes a black state, and the non-working state includes a transparent state; the electronic paper layer is in a working state when powered on and in a non-working state when not powered on.

3. The display panel according to claim 1, wherein The electronic paper layer includes a plurality of first pixel units, the transparent display layer includes a plurality of second pixel units, and the second pixel units include transparent sub-pixels and at least one color sub-pixel; Wherein, the orthographic projection of the first pixel unit on the target plane at least partially overlaps with the orthographic projection of the transparent sub-pixel in the corresponding second pixel unit on the target plane.

4. The display panel according to claim 3, characterized in that, The orthographic projection of each first pixel unit on the target plane respectively overlaps with the orthographic projection of the transparent sub-pixel in each second pixel unit on the target plane.

5. The display panel according to claim 3, wherein, The orthographic projection of some of the first pixel units on the target plane respectively overlaps with the orthographic projection of the transparent sub-pixels in each second pixel unit on the target plane; the orthographic projection of the remaining first pixel units on the target plane respectively overlaps with the orthographic projection of the color sub-pixels in each second pixel unit on the target plane.

6. The display panel according to claim 3, wherein, The electronic paper layer includes: A driving array layer; An electronic ink sac layer located on the side of the driving array layer away from the substrate; A color filter layer located on the side of the electronic ink sac layer away from the substrate; Wherein, the color filter layer includes a plurality of filter units, the filter units include at least one color filter, and the filter units correspond to the first pixel units one by one.

7. The display panel according to claim 1, wherein The display panel includes a display area and at least a part of a non-display area surrounding the display area; the display panel further includes: A plurality of pixel circuits located in the non-display area, connected to the transparent display layer, and used to supply power to the transparent display layer.

8. The display panel according to claim 1, wherein The display panel further includes: A touch layer located on the side of the transparent display layer away from the substrate; A cover plate located on the side of the touch layer away from the substrate.

9. A driving method for a display panel, characterized in that, Applied to the display panel according to any one of claims 1-8; the method includes: Obtaining ambient brightness data; When the ambient brightness data is greater than or equal to a preset brightness threshold, controlling the electronic paper layer to be in a working state and controlling the electrochromic layer and the transparent display layer to be in a non-working state; When the ambient brightness data is less than the preset brightness threshold, controlling the electrochromic layer and the transparent display layer to be in a working state and controlling the electronic paper layer to be in a non-working state.

10. A wearable device, characterized in that, Including the display panel according to any one of claims 1 to 8.

Images