A display panel

Abstract

The application provides a display panel, and relates to the technical field of display. The display panel comprises a base film, a first ink layer, a second ink layer and a substrate arranged in sequence, the first ink layer and the second ink layer form an ink layer unit, at least part of the base film is a display area, and the ink layer unit is matched with the display area in position; wherein the display area is used for displaying the color of the second ink layer in the case that there is light source light on the side of the substrate away from the base film, and the display area is used for displaying the color of the first ink layer in the case that there is no light source light on the side of the substrate away from the base film. The display panel can present a specific color when the light source irradiates, and can realize the function of color hiding when there is no light source irradiation.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel. Background Technology

[0002] With the continuous advancement of display technology, display panels are being used more and more widely in consumer electronics and other fields. In order to meet diverse display needs, a new type of display panel has emerged that can display a specific color in a specific area when illuminated by a light source, and the specific color remains visible in that specific area when the light source is turned off, making it impossible for the display panel to achieve the function of color hiding. Utility Model Content

[0003] The purpose of this application includes, for example, providing a display panel that can display a specific color when illuminated by a light source and can hide the color when there is no light source.

[0004] The embodiments of this application can be implemented as follows:

[0005] An embodiment of this application provides a display panel, which includes a base film, a first ink layer, a second ink layer and a substrate disposed sequentially. The first ink layer and the second ink layer constitute an ink layer unit. At least a portion of the base film is a display area, and the ink layer unit is positioned to match the display area.

[0006] The display area is used to display the color of the second ink layer when there is light from a light source on the side of the substrate away from the base film, and the display area is used to display the color of the first ink layer when there is no light from a light source on the side of the substrate away from the base film.

[0007] Optionally, the first ink layer may at least partially cover the second ink layer.

[0008] Optionally, the projections of the first ink layer and the second ink layer coincide in the direction perpendicular to the substrate.

[0009] Optionally, multiple ink layer units and multiple display areas are spaced apart along the length of the base film, and the positions of the multiple ink layer units and multiple display areas are matched one-to-one.

[0010] Optionally, the thickness of both the first ink layer and the second ink layer is 3μm to 5μm.

[0011] Optionally, the transmittance of the second ink layer is less than that of the first ink layer.

[0012] Optionally, the display panel further includes a light-shielding ink layer disposed between the substrate and the base film, the light-shielding ink layer being disposed around the ink layer unit.

[0013] Optionally, the transmittance of the light-shielding ink layer is less than that of the first ink layer, and the transmittance of the light-shielding ink layer is less than that of the second ink layer.

[0014] Optionally, the display panel further includes a third ink layer disposed between the substrate and the base film, and the third ink layer is disposed around the ink layer unit.

[0015] Optionally, the display panel further includes a light-shielding ink layer disposed around the third ink layer.

[0016] The beneficial effects of the display panel provided in this application embodiment include, for example: the display panel includes a base film, a first ink layer, a second ink layer and a substrate arranged sequentially, the first ink layer and the second ink layer constitute an ink layer unit, at least a portion of the base film is a display area, and the ink layer unit is positionally matched with the display area; wherein, the display area is used to display the color of the second ink layer when there is light from a light source on the side of the substrate away from the base film, and the display area is used to display the color of the first ink layer when there is no light from a light source on the side of the substrate away from the base film.

[0017] When there is no light from the light source on the substrate side, the human eye observes the color of the first ink layer after reflecting natural light, while the color of the second ink layer is obscured by the first ink layer and cannot be recognized. When light from the light source shines on the substrate side, the light passes through the substrate, the second ink layer, and the first ink layer in sequence, and finally exits from the base film side. At this time, the observer sees the color of the second ink layer. That is, when the external light source is off, the display area displays the color of the first ink layer, and the color of the second ink layer is hidden; when the light source is on, the color of the second ink layer appears in the display area, thus achieving the effect that the color of the second ink layer is displayed when illuminated by a light source and hidden when there is no light source. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the display panel in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram illustrating the simultaneous propagation of ambient light and light source light within the display panel in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram illustrating the propagation of only ambient light within the display panel in an embodiment of this application;

[0022] Figure 4 This embodiment of the application shows the color distribution on the base film side when there is no light source.

[0023] Figure 5 This is a color distribution diagram of the base film side when there is light from a light source, as shown in the embodiments of this application.

[0024] Icons: 10 - Display panel; 100 - Base film; 200 - Ink layer unit; 210 - First ink layer; 220 - Second ink layer; 300 - Substrate; 400 - Light-shielding ink layer; 500 - Third ink layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0031] Existing display panels retain a specific color in certain areas even when the light source is off, making that color constantly visible and preventing the selective hiding of colors based on usage needs. This limitation is particularly pronounced in scenarios requiring dynamic visual effects. Embodiments of this application provide a display panel that addresses at least this technical problem.

[0032] Please refer to Figures 1-5 The display panel 10 provided in the embodiments of this application includes a base film 100, a first ink layer 210, a second ink layer 220 and a substrate 300 arranged sequentially. The first ink layer 210 and the second ink layer 220 form an ink layer unit 200. At least a portion of the base film 100 is a display area. The ink layer unit 200 is positioned to match the display area. The display area is used to display the color of the second ink layer 220 when there is light from a light source on the side of the substrate 300 away from the base film 100, and the display area is used to display the color of the first ink layer 210 when there is no light from a light source on the side of the substrate 300 away from the base film 100.

[0033] Both the base film 100 and the substrate 300 serve as transparent carriers, allowing light from a light source to pass through in its thickness direction. The substrate 300 also forms a structural support and is used to support the ink layer. The function of the display area is as follows: when there is light from a light source on the side of the substrate 300 away from the base film 100, that is, when the light from the light source shines from the side of the substrate 300, the display area displays the color of the lower second ink layer 220; and when there is no light source on that side, that is, when there is no external light source, the display area displays the color of the upper first ink layer 210.

[0034] When the human eye observes from the base film 100 side, and there is no light from the light source illuminating the substrate 300 side, the human eye observes the color of the first ink layer 210 after reflecting natural light, while the color of the second ink layer 220 is obscured by the first ink layer 210 and cannot be recognized. However, when light from the light source illuminating the substrate 300 side shines on the substrate 300, the second ink layer 220, and the first ink layer 210 in sequence, and finally exits from the base film 100 side, the observer sees the color of the second ink layer 220.

[0035] When the external light source is turned off, the display area displays the color of the first ink layer 210, while the color of the second ink layer 220 is hidden. When the light source is turned on, the color of the second ink layer 220 is displayed in the display area, thus achieving the effect that the color of the second ink layer 220 is displayed when illuminated by a light source and hidden when there is no light source.

[0036] In some embodiments, the first ink layer 210 at least partially covers the second ink layer 220.

[0037] The first ink layer 210 can be a semi-transparent black ink layer (such as a smoky gray ink layer), and the second ink layer 220 can be a colored ink layer (such as a red ink layer, a blue ink layer, or a green ink layer). The display area presents a black visual effect corresponding to the semi-transparent black ink layer when there is no light source, while allowing the color of the underlying colored ink layer to pass through when the light source is on, thereby achieving color switching. To achieve this color switching function, at least a portion of the first ink layer 210 must completely cover the second ink layer 220 to ensure that, in the absence of backlight, the human eye can only observe the color of the first ink layer 210 from the base film 100 side.

[0038] When at least a portion of the first ink layer 210 covers the area of ​​the second ink layer 220, the coverage can be complete or partial, as long as it can visually mask the color of the second ink layer 220.

[0039] The stacking relationship between the first ink layer 210 and the second ink layer 220 can be achieved through a printing process. Specifically, the first ink layer 210 is first printed in a designated area of ​​the base film 100, and then the second ink layer 220 is stacked and printed on the first ink layer 210. The printing area of ​​the second ink layer 220 does not exceed the edge of the first ink layer 210. This ensures that when the light source on the substrate 300 side is not lit, ambient light incident from the base film 100 side, after passing through the base film 100 and reaching the first ink layer 210, is reflected to the observer's line of sight, and only the color of the first ink layer 210 is reflected, thereby achieving the effect of hiding the color of the second ink layer 220.

[0040] In an optional embodiment, the projections of the first ink layer 210 and the second ink layer 220 coincide in the direction perpendicular to the substrate 300.

[0041] The projections of the first ink layer 210 and the second ink layer 220 in the direction perpendicular to the substrate 300 are completely coincident, that is, the areas of the first ink layer 210 and the second ink layer 220 are the same, and the edges of the first ink layer 210 and the second ink layer 220 are completely coincident, thereby ensuring that the first ink layer 210 can effectively cover the second ink layer 220 without the edge color leakage caused by the offset.

[0042] When the projection of the first ink layer 210 and the second ink layer 220 is superimposed using an ink printing process, the first ink layer 210 is first printed in a specific area on the surface of the base film 100, and then the second ink layer 220 is precisely printed in the same area, so that the edges of the first ink layer 210 and the second ink layer 220 are completely superimposed. This is beneficial for accurately switching the color of the second ink layer 220 between being visible and hidden when switching the on and off states of the light source on the substrate 300 side.

[0043] In some embodiments, multiple ink layer units 200 and display areas are provided at intervals along the length direction of the base film 100, and the positions of the multiple ink layer units 200 and the multiple display areas are matched one by one.

[0044] The ink layer unit 200, jointly formed by the first ink layer 210 and the second ink layer 220, is used to achieve color switching functionality for a specific display area. Multiple ink layer units 200 are spaced apart along the length of the base film 100, each corresponding to a specific display area on the base film 100. Each display area can present corresponding visual effects under different light source conditions. The positions of the multiple ink layer units 200 and the multiple display areas are matched one-to-one, meaning that each ink layer unit 200 is precisely positioned within its corresponding display area. This ensures that when the light source is turned on or off, the transmission and reflection paths of light can accurately act on that area, thereby achieving the expected color display and hiding functions.

[0045] When there is light from a light source on the substrate 300 side, multiple display areas can simultaneously display the color of the corresponding second ink layer 220 on the base film 100, while when there is no light source on the substrate 300 side, multiple display areas can simultaneously display the color of the corresponding first ink layer 210 on the base film 100.

[0046] For example, three ink layer units 200 are spaced apart along the length of the base film 100. Correspondingly, three display areas are spaced apart on the base film 100. The three first ink layers 210 that match the positions of the three display areas are all smoky gray, and the three second ink layers 220 that match the positions of the three display areas are red, blue, and green, respectively.

[0047] When there is light from a light source on the substrate 300 side, the three display areas appear red, blue, and green respectively on the base film 100. When there is no light source on the substrate 300 side, the three display areas appear black on the base film 100.

[0048] In some embodiments, the thickness of both the first ink layer 210 and the second ink layer 220 is 3μm to 5μm.

[0049] Since multiple ink layer units 200 are arranged at intervals along the length of the base film 100, and there is a certain gap between them, if the thickness of the first ink layer 210 and the second ink layer 220 is too large, light crosstalk may occur between adjacent display areas due to the expansion of the light propagation path. To avoid the light crosstalk problem, the thickness of both the first ink layer 210 and the second ink layer 220 is controlled within the range of 3μm to 5μm. This ensures that while meeting printing requirements, each ink layer unit 200 maintains a relatively low thickness, thereby effectively limiting the diffusion of light in the lateral direction and improving the optical isolation between adjacent display areas.

[0050] When the light source is on, the light from the light source is transmitted upwards from the substrate 300 side and passes through the ink layer unit 200 and the base film 100. If the ink layer unit 200 is too thick, the light may be scattered or refracted to some extent during its passage, causing some light to propagate laterally between adjacent display areas, thus affecting the accuracy of the displayed colors. By controlling the thickness of the first ink layer 210 and the second ink layer 220 within the range of 3μm to 5μm, the path length of the light propagating laterally can be effectively reduced, allowing the light to act more concentratedly on the display area and improving the accuracy of color reproduction. This design not only improves the optical performance of the display panel 10 in multi-area display mode, but also effectively solves the light crosstalk problem caused by unreasonable ink layer thickness.

[0051] In some embodiments, the transmittance of the second ink layer 220 is less than that of the first ink layer 210.

[0052] Since the first ink layer 210 is located above the second ink layer 220, it faces the observer directly when there is no light source. Therefore, the high transmittance of the first ink layer 210 helps to allow more light to pass through and present the color of the second ink layer 220 when the light source is turned on, while it achieves the masking effect through its own color when there is no light source.

[0053] When the light source is off, ambient light a enters from the side of the base film 100, passes through the base film 100, and illuminates the surface of the first ink layer 210. The reflection of this light allows the observer to see the color of the first ink layer 210. The second ink layer 220, being covered by the first ink layer 210, cannot reflect its own color through ambient light, thus achieving a color-hiding function. When the light source is on, light b is transmitted upwards from the substrate 300 side, passing sequentially through the second ink layer 220, the first ink layer 210, and the base film 100. Since the transmittance of the first ink layer 210 is higher than that of the second ink layer 220, the light can penetrate the first ink layer 210 more fully and reveal the color of the second ink layer 220, allowing the observer to see the color of the second ink layer 220 from the base film 100 side.

[0054] In optional embodiments, the transmittance of the first ink layer 210 is 20% to 25%, and the transmittance of the second ink layer 220 is 5% to 24%. For example, the transmittance of the first ink layer 210 is 20%, and the transmittance of the second ink layer 220 is 5%; or, the transmittance of the first ink layer 210 is 23%, and the transmittance of the second ink layer 220 is 15%; or, the transmittance of the first ink layer 210 is 25%, and the transmittance of the second ink layer 220 is 20%.

[0055] In some embodiments, the display panel 10 further includes a light-shielding ink layer 400, which is disposed between the substrate 300 and the base film 100 and surrounds the ink layer unit 200.

[0056] To prevent light from propagating laterally or scattering in the area surrounding the ink layer unit 200, thereby causing light leakage, a light-shielding ink layer 400 is arranged in the outer area of ​​the ink layer unit 200 in this embodiment. When there are multiple ink layer units 200, the light-shielding ink layer 400 is simultaneously arranged around multiple ink layer units 200 and extends to the edge of the base film 100.

[0057] The light-shielding ink layer 400 is formed on the surface of the base film 100 by a printing process, located around the ink layer unit 200, and between the base film 100 and the substrate 300. This light-shielding ink layer 400 has low transmittance and high light absorption capacity, and can effectively absorb or block light that might otherwise propagate outward from the edge of the ink layer unit 200 when the light source is turned on, thereby preventing light from passing through outside the display area and achieving a visual focusing effect on the display area.

[0058] In practical applications, if the light-shielding ink layer 400 is not set, some light may leak out from around the ink layer unit 200 when the light source is turned on, causing the display area boundary to be blurred or the edge to glow. However, by setting the light-shielding ink layer 400 around the ink layer unit 200, such light leakage problems can be effectively avoided, which is especially suitable for application scenarios with high requirements for display boundaries, such as automotive display interfaces.

[0059] In some embodiments, the transmittance of the light-shielding ink layer 400 is less than that of the first ink layer 210, and the transmittance of the light-shielding ink layer 400 is less than that of the second ink layer 220.

[0060] The transmittance of the light-shielding ink layer 400 is lower than that of the first ink layer 210 and the second ink layer 220, meaning that the light-shielding ink layer 400 has a stronger ability to absorb light and a weaker ability to transmit it. This optical characteristic enables the light-shielding ink layer 400 to effectively block light that is transmitted upward from the substrate 300 side and may diffuse around the ink layer unit 200 when the light source is on, thereby preventing light from passing through the outer side of the display area; and when the light source is off, the light-shielding ink layer 400 can also reduce the reflection and scattering of ambient light in the edge area of ​​the panel, avoiding visual interference caused by light reflection.

[0061] In practical applications, if the transmittance of the light-shielding ink layer 400 is equal to or higher than that of the first ink layer 210 or the second ink layer 220, it may cause the light source to be transmitted or reflected outside the display area, resulting in undesirable visual effects such as bright edges or blurred areas. However, by setting the transmittance of the light-shielding ink layer 400 to be lower than that of the first ink layer 210 and the second ink layer 220, such problems can be effectively avoided, making the display effect of the display area more focused and clear.

[0062] When the transmittance of the first ink layer 210 is 20% to 25% and the transmittance of the second ink layer 220 is 5% to 24%, the transmittance of the light-blocking ink layer 400 can be 1% or less to achieve a good light-blocking effect.

[0063] In some embodiments, the display panel 10 further includes a third ink layer 500 disposed between the substrate 300 and the base film 100, and the third ink layer 500 is disposed around the ink layer unit 200.

[0064] The third ink layer 500 is a single ink layer, which is disposed on the periphery of the ink layer unit 200 and in close contact with the ink layer unit 200. It is used to highlight the edge outline of the display area or other permanent patterns. The permanent patterns can be circles, polygons or other irregular shapes, depending on the actual needs.

[0065] Specifically, the third ink layer 500 typically uses a high-contrast monochrome ink, such as white or light-colored ink, and is formed around the ink layer unit 200 through a printing process, located between the base film 100 and the substrate 300. When the light source is activated, the third ink layer 500 exhibits a visual effect corresponding to its color under transmitted light, making the boundaries of the ink layer unit 200 clearer and effectively distinguishing the display area from the non-display area. When the light source is turned off, the reflective properties of the third ink layer 500 allow it to maintain a certain degree of visibility under ambient light, further enhancing the recognizability of the outline of the ink layer unit 200.

[0066] In practical applications, if the third ink layer 500 is not set, the edge of the ink layer unit 200 may be blurred due to the influence of ambient light, affecting the overall display effect of the panel; however, by setting the third ink layer 500 around the ink layer unit 200, the edge contrast can be effectively enhanced, making the outline or pattern corresponding to the display area more eye-catching and intuitive.

[0067] In the case where the display panel 10 also includes a light-shielding ink layer 400, the light-shielding ink layer 400 is disposed around the third ink layer 500.

[0068] The light-shielding ink layer 400 is located outside the third ink layer 500. Because this light-shielding ink layer 400 has low transmittance and high light absorption, it effectively prevents light from being transmitted or scattered in the area surrounding the third ink layer 500, thus avoiding light leakage that could affect the overall visual consistency of the display panel 10. Since the third ink layer 500 typically uses a high-contrast, light-colored ink, if it were not surrounded by the light-shielding ink layer 400, light might leak out from the periphery of the third ink layer 500 when the light source is turned on, causing light to shine beyond the boundary of the display area and affecting the consistency of the display effect.

[0069] This design allows the light-shielding ink layer 400 to not only effectively absorb or block the propagation path of light transmitted from the substrate 300 side upward in the non-display area, but also to visually enhance the boundary definition effect of the third ink layer 500, making the display area more focused and the boundary clearer.

[0070] The display panel 10 of this application embodiment is manufactured using an IML insert injection molding process. The specific manufacturing process is as follows: First, a first ink layer 210 is printed on a base film 100. A second ink layer 220 is stacked and printed on the first ink layer 210. A third ink layer 500 is printed on the base film 100 on the outside of the ink layer unit 200 composed of the first ink layer 210 and the second ink layer 220. A light-shielding ink layer 400 is printed on the base film 100 on the outside of the third ink layer 500. The third ink layer 500 is extended to the edge of the base film 100. Then, the base film 100 with the ink printed is placed on the mold fixed side. Finally, the substrate 300 is injection molded to the side of the base film 100 where the ink layer is provided to form the display panel 10.

[0071] In summary, this application provides a display panel 10. When there is no light from a light source illuminating the substrate 300 side, the human eye observes the color of the first ink layer 210 after reflecting natural light on the base film 100 side, while the color of the second ink layer 220 is obscured by the first ink layer 210 and cannot be recognized. When light from a light source illuminating the substrate 300 side, the light passes through the substrate 300, the second ink layer 220, and the first ink layer 210 in sequence, and finally exits from the base film 100 side. At this time, the observer sees the color of the second ink layer 220. That is, when the external light source is turned off, the display area displays the color of the first ink layer 210, and the color of the second ink layer 220 is hidden. When the light source is turned on, the color of the second ink layer 220 is displayed in the display area, thereby achieving the effect that the color of the second ink layer 220 is displayed when illuminated by a light source and hidden when there is no light source.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, The device includes a base film (100), a first ink layer (210), a second ink layer (220), and a substrate (300) arranged sequentially. The first ink layer (210) and the second ink layer (220) form an ink layer unit (200). At least a portion of the base film (100) is a display area, and the ink layer unit (200) is positioned to match the display area. The display area is used to display the color of the second ink layer (220) when there is light from a light source on the side of the substrate (300) away from the base film (100), and the display area is used to display the color of the first ink layer (210) when there is no light source on the side of the substrate (300) away from the base film (100).

2. The display panel according to claim 1, characterized in that, The first ink layer (210) at least partially covers the second ink layer (220).

3. The display panel according to claim 2, characterized in that, In the direction perpendicular to the substrate (300), the projections of the first ink layer (210) and the second ink layer (220) coincide.

4. The display panel according to claim 1, characterized in that, The ink layer units (200) and the display areas are arranged in multiple intervals along the length direction of the base film (100), and the positions of the multiple ink layer units (200) and the multiple display areas are matched one by one.

5. The display panel according to claim 4, characterized in that, The thickness of the first ink layer (210) and the thickness of the second ink layer (220) are both 3μm to 5μm.

6. The display panel according to claim 1, characterized in that, The transmittance of the second ink layer (220) is less than that of the first ink layer (210).

7. The display panel according to claim 1, characterized in that, The display panel (10) further includes a light-shielding ink layer (400), which is disposed between the substrate (300) and the base film (100) and surrounds the ink layer unit (200).

8. The display panel according to claim 7, characterized in that, The transmittance of the light-shielding ink layer (400) is less than that of the first ink layer (210), and the transmittance of the light-shielding ink layer (400) is less than that of the second ink layer (220).

9. The display panel according to claim 1, characterized in that, The display panel (10) further includes a third ink layer (500) disposed between the substrate (300) and the base film (100), and the third ink layer (500) is disposed around the ink layer unit (200).

10. The display panel according to claim 9, characterized in that, The display panel (10) further includes a light-shielding ink layer (400) disposed around the third ink layer (500).

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