Display module and electronic device

Abstract

The present application belongs to the field of electronic devices. Disclosed are a display module and an electronic device. The display module comprises an organic film layer, a color resist layer, a packaging layer and a driving layer, which are stacked in sequence, wherein the color resist layer comprises a first-layer body and a plurality of color resist units; the first-layer body is a black matrix structural member and is provided with a plurality of through holes; the plurality of color resist units are embedded in the plurality of through holes in one-to-one correspondence; the packaging layer comprises a second-layer body and a plurality of light-emitting units; the plurality of light-emitting units are all packaged in the second-layer body; each color resist unit comprises an embedded portion and a protruding portion connected to each other; the embedded portion is embedded in one through hole; the protruding portion is located on the side of the embedded portion facing away from the packaging layer; and a surface on the side of the protruding portion facing away from the embedded portion is an arc-shaped surface.

Description

Display modules and electronic devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on August 7, 2023, with application number 202310988697.7 and invention name “Display module and electronic device”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the technical field of electronic equipment, and specifically relates to a display module and an electronic device. Background Art

[0004] Active-matrix organic light-emitting diodes (AMOLEDs) have been widely used in electronic devices such as mobile phones due to their superior display performance. Furthermore, to make electronic devices thinner and lighter, a common technical approach is to remove the polarizer from the display module, which can also reduce the thickness and power consumption of the display.

[0005] However, because the display screen lacks a polarizer, when the screen is off, after external light enters the display module, the light is reflected by the luminescent pixel material, resulting in reflected light that can still exit the display module. Furthermore, because the luminescent pixel material is attached to the driver layer, which has a relatively low surface flatness, the surface of the luminescent pixel material is also uneven, resulting in countless angles between the reflected light exiting the display module and the thickness direction of the display module. When these reflected lights enter the user's eyes, the user sees a mixture of reflected light of different colors. This means that the display module suffers from severe color dispersion, which seriously affects the visual effect of the display module when the screen is off.

[0006] Summary of the Invention

[0007] The purpose of the embodiments of the present application is to provide a display module and an electronic device to solve the problem that the current display module using a depolarizer has a relatively serious dispersion phenomenon, which seriously affects the visual effect of the display module in the off state.

[0008] In a first aspect, embodiments of the present application disclose a display module comprising an organic film layer, a color resist layer, an encapsulation layer, and a driving layer stacked in sequence, wherein the color resist layer comprises a first layer body and a plurality of color resist units, the first layer body being a black matrix structural member and having a plurality of through holes, the plurality of color resist units being embedded in the plurality of through holes in a one-to-one correspondence, the encapsulation layer comprising a second layer body and a plurality of light-emitting units, the plurality of light-emitting units being encapsulated in the second layer body;

[0009] The color resist unit includes an embedded portion and a raised portion that are interconnected. The embedded portion is embedded in the through hole, and the raised portion is located on the side of the embedded portion away from the encapsulation layer. The surface of the raised portion on the side away from the embedded portion is an arc-shaped surface, and is protruded in the direction away from the embedded portion to gather and reduce the coverage area of ​​the light incident on the color resist unit on the light-emitting unit.

[0010] In a second aspect, an embodiment of the present application discloses an electronic device comprising the above-mentioned display module.

[0011] In the technical solution disclosed in the embodiments of the present application, the raised portions in the color-resistance unit can be used to reduce the area covered by light incident from the color-resistance unit when projected onto the encapsulation layer. This, in turn, reduces the number of microsurfaces in the encapsulation layer corresponding to the light, significantly reducing the coverage of the reflected light and, in turn, reducing the amount of light emitted from the color-resistance unit outside the display module. Furthermore, when the reflected light is emitted from the color-resistance unit, the raised portions can still provide a light distribution effect for the reflected light, allowing the reflected light to be emitted substantially parallel to the thickness of the display module. In this case, the reflected light incident parallel to the thickness of the display module can be prevented from propagating to the periphery of the display module when the screen is off, thereby preventing the user from viewing an image composed of a mixture of multiple colors of light, thereby enhancing the visual effect of the display module when the screen is off.

[0012] In the embodiment of the present application, for light incident non-parallel to the thickness of the display module, the vast majority of this light is reflected by the first layer and blocked by it, preventing it from propagating outside the display module. Even if a small amount of reflected light is able to pass through the color-resistance unit and out of the display module, it will be affected by the light distribution effect of the raised portion, so that its propagation direction aligns with the original propagation direction, thus preventing the occurrence of chromatic aberration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] FIG1 is a schematic diagram of a propagation path of incident light in a display module disclosed in an embodiment of the present application;

[0015] FIG. 2 is a schematic diagram of a propagation path of reflected light in a display module disclosed in an embodiment of the present application.

[0016] Figure numerals: 110 - organic film layer, 120 - color resist layer, 121 - first layer body, 122 - color resist unit, 122a - embedded part, 122b - raised part, 130 - encapsulation layer, 131 - second layer body, 132 - light-emitting unit, 140 - driving layer, 150 - touch film layer, 160 - polyimide film layer, 170 - supporting protective layer, 180 - dielectric layer, 200 - light-absorbing part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0019] As shown in Figures 1 and 2, the embodiment of the present application discloses a display module that uses depolarizer technology. That is, the display module is not provided with a polarizer. The polarizer is generally used to prevent the reflected light generated by the reflection of the light incident on the display module from being emitted outside the display module. The display module disclosed in the embodiment of the present application includes an organic film layer 110, a color resist layer 120, an encapsulation layer 130, and a drive layer 140. Of course, the display module may also include a touch film layer 150, a polyimide film layer 160, and a support and protection layer 170. Considering the brevity of the text, it will not be described in detail here.

[0020] Among them, the organic film layer 110 is usually the outermost layer of the display module, which can provide protection for other film layers in the display module; the color resist layer 120 is used to selectively transmit light of corresponding colors and block light of other colors; the encapsulation layer 130 is used to provide a luminous effect, and the specific component used for luminescence is the light-emitting unit 132, and the other parts of the encapsulation layer 130 are used to provide encapsulation for the light-emitting unit 132; the driving layer 140 is used to install the driving unit.

[0021] Specifically, the color resist layer 120 includes a first layer body 121 and a plurality of color resist units 122. The first layer body 121 is a black matrix structure that prevents light from passing through. Furthermore, to ensure that the display module still has display capabilities, the first layer body 121 is provided with a plurality of through-holes in the color resist layer 120 to ensure that light generated by the encapsulation layer 130 can be emitted through the through-holes to the side of the color resist layer 120 away from the encapsulation layer 130. To ensure that the display module can display the target image as required, the plurality of color resist units 122 are each used to filter light of a single color. For example, the plurality of color resist units 122 may include different types of color resist units 122 for filtering red light, blue light, and green light. At the same time, the plurality of color resist units 122 are embedded in the plurality of through-holes in a one-to-one correspondence, thereby utilizing the plurality of color resist units 122 to filter light of the corresponding colors.

[0022] As described above, the light-emitting units 132 are specifically used to provide light in the encapsulation layer 130. Accordingly, to protect the light-emitting units 132, the encapsulation layer 130 further includes a second layer body 131, and the plurality of light-emitting units 132 are encapsulated in the second layer body 131. Furthermore, to improve the light utilization efficiency of the light-emitting units 132, the plurality of light-emitting units 132 can be arranged in a one-to-one correspondence with the plurality of color-resist layers 120, and the corresponding light-emitting units 132 and color-resist units 122 can be arranged opposite each other along the thickness direction of the display module.

[0023] Moreover, in the embodiment of the present application, in order to reduce or even prevent the reflected light from being transmitted to the display module in the screen-off state and reflected in the display module from entering the user's eyes, as shown in FIG1 , the color resist unit 122 includes an embedded portion 122a and a raised portion 122b that are interconnected. The embedded portion 122a is the portion of the color resist unit 122 embedded in the through hole, and the raised portion 122b is located on the side of the embedded portion 122a away from the encapsulation layer 130, and the surface of the raised portion 122b on the side away from the embedded portion 122a is an arc-shaped surface, which is convex in the direction away from the embedded portion 122a, so that the arc-shaped surface can provide a light distribution effect similar to a "convex lens" to gather the light incident on the color resist unit 122, so that the coverage area of ​​the light on the encapsulation layer 130 is reduced.

[0024] Specifically, the color resist unit 122 is typically relatively small relative to the thickness of the display module. Consequently, even if light incident on the display module in the off state and having an angle with the thickness direction of the display module (i.e., the angle of incidence) that is not 0° is reflected on the micro-surfaces of the encapsulation layer 130 perpendicular to the aforementioned thickness direction, the vast majority of the reflected light will essentially strike the surface of the first layer 121 in the color resist layer 120 that faces the encapsulation layer 130, thereby being blocked by the first layer 121 and unable to escape from the display module in the off state. Furthermore, if the incident light strikes the micro-surfaces of the encapsulation layer 130 that are tilted relative to the thickness direction of the display module, the probability of the reflected light striking the first layer 121 is further increased. Furthermore, for ease of understanding, this article only uses light incident parallel to the thickness direction of the display module as an example.

[0025] In current technology, due to the low surface flatness of the drive layer 140, light incident parallel to the thickness of the display module may also have a non-zero angle of reflection due to the reflective surface not being perpendicular to the thickness of the display module. Furthermore, in current technology, light incident from a single color-resistance unit 122 covers a relatively large area on the drive layer 140, resulting in a large number of micro-surfaces with varying inclinations within this area that can provide different reflection directions for the incident light. Although the angle of reflection of these reflected rays may not be zero, due to the large amount of light, a significant amount of reflected light can be emitted from the color-resistance unit 122 beyond the display module when the screen is off, and in different directions around the display module when the screen is off. Some of this light can then enter the eyes of a user on the side of the display module when the screen is off, causing the user to see an image composed of a mixture of different colors.

[0026] In the technical solution disclosed in the embodiments of the present application, the raised portions 122b in the color-resist unit 122 can reduce the area covered by light incident from the color-resist unit 122 when projected onto the encapsulation layer 130. Consequently, the number of microsurfaces in the encapsulation layer 130 corresponding to the light is also relatively small, significantly reducing the coverage area of ​​the reflected light and, in turn, the amount of light emitted from the color-resist unit 122 outside the display module. Furthermore, when the reflected light is emitted from the color-resist unit 122, the raised portions 122b still provide a light distribution effect, allowing the reflected light to be emitted substantially parallel to the thickness of the display module. In this case, reflected light incident parallel to the thickness of the display module is prevented from propagating toward the periphery of the display module when the screen is off, thereby preventing the user from viewing an image composed of a mixture of multiple colors, thereby enhancing the visual quality of the display module when the screen is off.

[0027] In the embodiment of the present application, for light incident in a direction not parallel to the thickness of the display module, the vast majority of light is reflected toward the first layer body 121 and blocked by the first layer body 121, preventing it from propagating outside the display module. Even if a small amount of reflected light is still able to propagate outside the display module from the color resist unit 122, it will be affected by the light distribution effect of the protrusion 122b, so that its propagation direction corresponds to the original propagation direction, thus preventing the occurrence of color dispersion.

[0028] As described above, the raised portion 122b can focus light incident from the color-resistance unit 122. Optionally, the area covered by light incident from a single color-resistance unit 122 on the driving layer 140 can be a light spot having an area smaller than that of the color-resistance unit 122. To further reduce the amount and level of noise of reflected light that can be emitted outside the display module in the off-screen state, in another embodiment of the present application, when the display module is in the off-screen state, multiple light rays incident from the color-resistance unit 122 and located within a plane (denoted as a first plane) along the thickness direction of the display module can be focused onto the same point on the surface of the color-resistance layer 120 facing the light-emitting unit 132, thereby focusing and reducing the coverage area of ​​the light incident on the color-resistance unit 132.

[0029] In detail, by making the surface of the protrusion 122b facing away from the embedded portion 122a intercepted by the first plane in the thickness direction of the display module into an arc segment, and based on parameters such as the spacing between the light-emitting unit 132 and the color resist unit 122, the parameters of the aforementioned arc segment can be designed, so that light parallel to the thickness direction of the display module passes through the aforementioned arc segment, and the light after being distributed by the arc segment can all be focused on the same point on the surface of the light-emitting unit 132 corresponding to the color resist unit 122 facing the color resist layer 120.

[0030] In addition, the first plane in the thickness direction of the display module can specifically be a plane perpendicular to the length direction of the display module, or the first plane can also be a plane perpendicular to the thickness direction of the display module. Of course, the first plane can also be neither perpendicular to the length direction of the display module nor perpendicular to the width direction of the display module.

[0031] Of course, in order to ensure that the surface of the protrusion 122b facing away from the embedded portion 122a remains an arc-shaped surface, any figure obtained by cutting the protrusion 122b parallel to the aforementioned first plane can be an arc-shaped line segment, so that the light incident from the color resist unit 122 can form countless points on the corresponding light-emitting unit 132 after passing through the arc-shaped line segments at different positions on the protrusion 122b, and these points are connected to form a straight line segment.

[0032] To further reduce the amount and level of noise of reflected light that can escape from the display module, in another embodiment of the present application, when the display module is in the off state, multiple light rays incident from the color resist unit 122 and parallel to the thickness direction of the display module can be focused onto the same point on the surface of the light-emitting unit 132 facing the color resist layer 120. That is, in this embodiment of the present application, any intersection of the surface of the raised portion 122b facing away from the embedded portion 122a with any plane passing through the thickness direction of the display module forms an arc segment. Furthermore, based on parameters such as the position of the point on the light-emitting unit 132 where the light rays are to be focused and the positional relationship between the color resist unit 122, parameters such as the curvature of the corresponding position on the surface of the raised portion 122b facing away from the embedded portion 122a can be designed. This ensures that any light ray incident from the color resist unit 122 and parallel to the thickness direction of the display module is focused onto the same point on the corresponding light-emitting unit 132.

[0033] As described above, by changing specific parameters such as the curvature at different locations on the surface of the raised portion 122b facing away from the embedded portion 122a, the projection position of light incident at corresponding locations on the light-emitting unit 132 can be controlled. In another embodiment of the present application, the display module further includes a dielectric layer 180, which is interposed between the organic film layer 110 and the color resist unit 122. The dielectric layer 180 can change the incident angle of light from the organic film layer 110 to the color resist unit 122.

[0034] Specifically, by changing the refractive index of the dielectric layer 180, the dielectric layer 180 can be configured to change the incident angle of light originally incident directly from the organic film layer 110 onto the color resist unit 122. Furthermore, after the parameters of the color resist unit 122 are determined, portions of the dielectric layer 180 with corresponding parameters can be flexibly positioned at different locations within the color resist unit 122 based on the specific projection position of the light incident from the color resist unit 122. This ensures that multiple light rays located within the same plane parallel to the thickness direction of the display module are focused on the same point of the light-emitting unit 132 after passing through corresponding locations within the dielectric layer 180 and the color resist unit 122. Compared to designing parameters at different locations on the raised portion 122b, the technical solution disclosed in the embodiments of the present application for focusing different light rays on the same point is relatively easy to design and process.

[0035] Specifically, the dielectric layer 180 can be disposed only within the region of each color-resistance unit 122 facing the organic film layer 110. In another embodiment of the present application, to further reduce the difficulty of processing the dielectric layer 180 and improve the reliability of the display module, the dielectric layer 180 is sandwiched between the organic film layer 110 and the color-resistance layer 120, such that the dielectric layer 180 covers the first body 121 and each color-resistance unit 122. In other words, the dielectric layer 180 is a monolithic structure. To ensure that the dielectric layer 180 can still refract light incident on each color-resistance unit 122, the parameters of the region of the dielectric layer 180 facing each color-resistance unit 122 can be designed accordingly.

[0036] As described above, the raised portion 122 b in the color resist unit 122 can provide a focusing effect for the light incident on the color resist unit 122, so that the light forms a light spot on the light-emitting unit 132 with an area smaller than the area of ​​the color resist unit 122, or forms a straight line segment composed of countless photoelectric elements on the light-emitting unit 132, or only forms a light spot on the light-emitting unit 132. This can greatly reduce the amount and disorder of the reflected light emitted outside the display module.

[0037] To prevent light incident on the display module from being emitted outside the display module, in a specific embodiment of the present application, the display module further includes a light absorbing portion 200. The light absorbing portion 200 is provided on the side of the light emitting unit 132 facing the color resist unit 122. Based on the light collection performance of the color resist unit 122, the light absorbing portion 200 can be positioned corresponding to the area covered by the light on the light emitting unit 132, so that light incident from the color resist unit 122 can be collected by the light absorbing portion 200 and "absorbed" by the light absorbing portion 200. Specifically, the light absorbing portion 200 can be formed of a black material to ensure that light incident on its surface is not reflected on its surface. As a result, all light incident on the display module is absorbed by the light absorbing portion 200 and is not emitted from the color resist unit 122 outside the display module.

[0038] Specifically, the light absorbing portion 200 can be arranged on the side of the light emitting unit 132 facing the color filter layer 120. In order to minimize the blocking effect of the light actively emitted by the light emitting unit 132 and thereby improve the display effect of the display module, in another embodiment of the present application, the light absorbing portion 200 can be embedded in the side of the light emitting unit 132 facing the color filter layer 120, that is, the surface of the light absorbing portion 200 facing the color filter layer 120 is basically flush with the surface of the light emitting unit 132 facing the color filter layer 120.

[0039] In addition, since the light emitted by the portion of the light emitting unit 132 outside the light absorbing portion 200 can still propagate in a direction inclined relative to the thickness direction of the display module, the provision of the light absorbing portion 200 will basically not hinder the normal lighting of the light emitting unit 132.

[0040] As described above, the color resist unit 122 includes an embedded portion 122a and a raised portion 122b. To prevent light emitted by the light-emitting unit 132 from being transmitted from the contact surface between the embedded portion 122a and the wall of the through-hole of the first layer body 121 to the outside of the display module, thereby affecting the display effect of the display module, the outer edge of the raised portion 122b can be extended to directly above the contact surface between the wall of the through-hole and the embedded portion 122a. To reduce the difficulty of processing the color resist unit 122, the raised portion 122b can be extended in a direction perpendicular to the thickness direction of the display module to the outside of the contact surface between the wall of the through-hole and the embedded portion 122a. In other words, the raised portion 122b covers a portion of the first layer body 121, which extends from the wall of the through-hole to the outside of the through-hole. The specific extent of the extension can be flexibly determined according to actual conditions.

[0041] When the color resist unit 122 includes an embedded portion 122a and a raised portion 122b, the two can be formed by separate molding. The raised portion 122b can be connected to the side of the embedded portion 122a facing away from the encapsulation layer 130 using an adhesive material, while maintaining the same light propagation direction between the two portions. To further reduce the processing difficulty of the color resist unit 122 and improve the straightness of light propagation within the color resist unit 122, the embedded portion 122a and the raised portion 122b can be formed by integral molding.

[0042] Based on the display module disclosed in any of the above embodiments, the embodiments of the present application also disclose an electronic device, which includes any of the above display modules. Of course, the electronic device may also include components such as a housing, a battery, and a circuit board. Considering the simplicity of the text, they will not be introduced one by one here.

[0043] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0044] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A display module, comprising an organic film layer, a color resist layer, an encapsulation layer and a driving layer stacked in sequence, wherein: The color resistance layer includes a first layer body and a plurality of color resistance units, the first layer body is a black matrix structure and is provided with a plurality of through holes, and the plurality of color resistance units are embedded in the plurality of through holes in a one-to-one correspondence, the encapsulation layer includes a second layer body and a plurality of light-emitting units, and the plurality of light-emitting units are all encapsulated in the second layer body; The color resist unit includes an embedded portion and a raised portion connected to each other, the embedded portion is embedded in the through hole, the raised portion is located on a side of the embedded portion away from the encapsulation layer, and a surface of the raised portion on a side away from the embedded portion is an arc surface.

2. The display module according to claim 1, wherein: When the display module is in the screen-off state, a plurality of light rays incident from the color resist unit and located in a plane passing through the thickness direction of the display module are focused on the same point on the surface of the light-emitting unit facing the color resist layer, so as to gather and reduce the coverage area of ​​the light rays incident to the color resist unit on the light-emitting unit.

3. The display module according to claim 2, wherein: When the display module is in the screen-off state, a plurality of light rays parallel to the thickness direction of the display module and incident from the color-resistance unit are focused on the same point on the surface of the light-emitting unit facing the color-resistance layer.

4. The display module according to claim 2 or 3, wherein: It also includes a dielectric layer, which is sandwiched between the organic film layer and the color-resistance unit, and is used to change the incident angle of light from the organic film layer to the color-resistance unit.

5. The display module according to claim 4, wherein: The dielectric layer is sandwiched between the organic film layer and the color resist layer, and the dielectric layer covers the first layer body and each of the color resist units.

6. The display module according to claim 1, wherein: The display module further comprises a light absorbing portion, and the light absorbing portion is disposed on a side of the light emitting unit facing the color resistance unit, and the light incident from the color resistance unit is gathered on the light absorbing portion.

7. The display module according to claim 6, wherein: The light absorbing portion is embedded on a side of the light emitting unit facing the color resist layer.

8. The display module according to claim 1, wherein: Along a direction perpendicular to the thickness direction of the display module, the protrusion extends beyond the fitting surface between the embedding portion and the hole wall of the through hole.

9. The display module according to claim 1, wherein: The embedded portion and the raised portion are integrally formed.

10. An electronic device comprising the display module according to any one of claims 1 to 9.

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