Displays and electronic devices

Abstract

The embodiments of the present application provide a display screen and an electronic device, which relate to the field of display technology and improve the compatibility of optical under-screen fingerprint recognition. The display screen includes: a display panel, a first 1 / 4 phase difference layer, a linear polarization layer, and a second 1 / 4 phase difference layer stacked in sequence; the display screen includes a display area, the display area includes a fingerprint recognition area and a non-fingerprint recognition area, and the first 1 / 4 phase difference layer covers the display area; the second 1 / 4 phase difference layer overlaps with the non-fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the fingerprint recognition area; or the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display screen and an electronic device. Background Art

[0002] Optical fingerprint recognition is a common authentication method for current displays to achieve under-screen fingerprint recognition. Compared with ultrasonic fingerprint recognition, it has advantages such as low cost and high maturity. However, optical fingerprint recognition cannot achieve under-screen fingerprint recognition when used with some types of displays. In other words, the compatibility of optical under-screen fingerprint recognition is low. Utility Model Content

[0003] In view of this, the present application provides a display screen and an electronic device that improves the compatibility of optical-based under-screen fingerprint recognition.

[0004] In a first aspect, a display screen is provided, comprising: a display panel, a first 1 / 4 phase difference layer, a linear polarization layer, and a second 1 / 4 phase difference layer stacked in sequence; the display screen comprises a display area, the display area comprises a fingerprint recognition area and a non-fingerprint recognition area, and the first 1 / 4 phase difference layer covers the display area; the second 1 / 4 phase difference layer overlaps with the non-fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the fingerprint recognition area; or, the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area.

[0005] The display screen includes a display panel, a first 1 / 4 phase difference layer, a linear polarization layer, and a second 1 / 4 phase difference layer stacked in sequence, wherein the second 1 / 4 phase difference layer can be set to overlap with the non-fingerprint recognition area and not overlap with the fingerprint recognition area, or to overlap with the fingerprint recognition area and not overlap with the non-fingerprint recognition area. Through such a setting, the display screen can emit linear polarized light at a position corresponding to the fingerprint recognition area. The polarization direction of the fingerprint reflected light after the linear polarized light is reflected by the finger remains unchanged, and can still be transmitted through the linear polarization layer to the optical fingerprint recognition sensor under the display panel, thereby realizing optical-based under-screen fingerprint recognition, and enabling the display screen to emit circularly polarized light at a position corresponding to the non-fingerprint recognition area. In other words, in a display screen that emits circularly polarized light, optical-based under-screen fingerprint recognition is realized, that is, the compatibility of optical-based under-screen fingerprint recognition is improved.

[0006] In a possible embodiment, the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area; the display screen also includes a third 1 / 4 phase difference layer located between the linear polarization layer and the second 1 / 4 phase difference layer; the third 1 / 4 phase difference layer covers the display area.

[0007] In a possible implementation, the display screen further includes: a cover plate located on the side of the linear polarizing layer away from the first 1 / 4 phase difference layer; and a second 1 / 4 phase difference layer located on the side of the cover plate close to the linear polarizing layer or on the side of the cover plate away from the linear polarizing layer. The second 1 / 4 phase difference layer is arranged near the cover plate, so that the second 1 / 4 phase difference layer can be patterned on the cover plate to avoid damage to other polarizing functional film layers caused by the patterning process, and the shape, size, position, etc. of the patterning can be flexibly controlled.

[0008] In a possible implementation, the second 1 / 4 phase difference layer is a coating layer on the cover plate, and the process is simple.

[0009] In a possible implementation, the display screen further includes: a protective layer, the second 1 / 4 phase difference layer is located between the cover plate and the protective layer, and the protective layer is used to compensate for the step difference between the second 1 / 4 phase difference layer and the cover plate. On the one hand, the protective layer can protect the second 1 / 4 phase difference layer. On the other hand, since the second 1 / 4 phase difference layer does not cover the entire display area, but is a patterned film layer, there is a difference in the position corresponding to the fingerprint recognition area and the non-fingerprint recognition area, thereby forming a film layer step difference on the cover plate. Therefore, the protective layer can be used to compensate for the film layer step difference of the second 1 / 4 phase difference layer, so that the stack formed by the cover plate, the second phase difference layer and the protective layer is a flat film layer structure.

[0010] In a possible implementation, the protective layer is a coating layer on the cover plate and the second 1 / 4 phase difference layer, and the process is simple.

[0011] In a possible implementation, the second 1 / 4 phase difference layer includes a plurality of stacked layers with different refractive indices, and the phase delay function can be conveniently realized by adjusting the thickness and material refractive index of different layers.

[0012] In a possible implementation, the non-fingerprint recognition area surrounds the fingerprint recognition area so that the user can fully utilize the display area to realize under-screen fingerprint recognition; the display panel is an organic light-emitting display OLED panel. Compared with other types of display panels, OLED panels are easier to set with higher light transmittance, so they are more suitable for realizing under-screen fingerprint recognition.

[0013] In one possible embodiment, the second 1 / 4 phase difference layer overlaps with the non-fingerprint recognition area, the second 1 / 4 phase difference layer does not overlap with the fingerprint recognition area, the second 1 / 4 phase difference layer has a hollow structure corresponding to the fingerprint recognition area, and the edge of the hollow structure is one of a circle, a square, a rectangle and a rhombus; or, the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area, and the second 1 / 4 phase difference layer has an outer edge corresponding to the fingerprint recognition area, and the outer edge is one of a circle, a square, a rectangle and a rhombus.

[0014] In a second aspect, an electronic device is provided, comprising the above-mentioned display screen; an optical fingerprint recognition sensor corresponding to the fingerprint recognition area of ​​the display screen, the optical fingerprint recognition sensor being located on a side of the display panel away from the first 1 / 4 phase difference layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the optical path of a display screen in the related art;

[0017] Figure 2 A top view of a display screen in an embodiment of the present application;

[0018] Figure 3 Based on Figure 2 A schematic diagram of the optical path of a cross-sectional structure of the display screen in the AA' direction;

[0019] Figure 4 for Figure 3 A schematic diagram of an exploded structure of the display screen;

[0020] Figure 5 Based on Figure 2 A schematic diagram of the optical path of another cross-sectional structure of the display screen in the AA' direction;

[0021] Figure 6 for Figure 5 A schematic diagram of an exploded structure of the display screen;

[0022] Figures 7 to 10 They are Figure 2 Schematic diagram of various cross-sectional structures of the display screen in the AA' direction;

[0023] Fig.11 This is a schematic diagram of a process flow of a partial laminated structure in a display screen in an embodiment of the present application;

[0024] Fig.12 This is a schematic diagram of the process flow of a partial stacking structure in another display screen in an embodiment of the present application;

[0025] Fig.13 This is a structural block diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0029] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] Before introducing the embodiments of the present application, the related technologies and their technical problems are first explained.

[0031] If you want to achieve under-screen fingerprint recognition, the light emitted from the display needs to reach the finger and reflect back. The light reflected from the finger passes through the display and reaches the optical fingerprint sensor under the display to recognize the ridges and valleys of the fingerprint, thereby achieving under-screen fingerprint recognition. However, some displays emit circularly polarized light, which cannot achieve under-screen fingerprint recognition.

[0032] like Figure 1 As shown, in some related technologies, the display screen includes a stacked display panel, a 1 / 4 phase difference layer, a linear polarization layer and a 1 / 4 phase difference layer in sequence. Assuming that optical under-screen fingerprint recognition is to be performed based on such a display screen, when the light emitted upward from the display panel reaches the linear polarization layer and enters the output, the light is horizontally linearly polarized light, and the horizontal linear polarized light continues to pass upward through the 1 / 4 phase difference layer and then becomes right-handed circularly polarized light. In other words, this type of display screen emits circularly polarized light. If the right-handed circularly polarized light emitted by the display screen reaches the finger, the light reflected from the finger will become left-handed circularly polarized light. The left-handed circularly polarized light continues to pass downward through the 1 / 4 phase difference layer and then becomes vertical linear polarized light. However, the vertical linear polarized light is exactly perpendicular to the polarization direction of the linear polarization layer, so it cannot pass through the linear polarization layer and continue to propagate downward. So, Figure 1The display screen that emits circularly polarized light as shown cannot realize under-screen fingerprint recognition based on an optical fingerprint recognition sensor.

[0033] Based on the problems of related technologies, the embodiments of the present application provide a display screen and an electronic device, which can enable a display screen that emits circularly polarized light to realize under-screen fingerprint recognition based on an optical fingerprint recognition sensor to improve the compatibility of optical under-screen fingerprint recognition. The embodiments of the present application are described below.

[0034] like Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the present application provides a display screen 1, comprising: a display panel 11, a first 1 / 4 phase difference layer 12, a linear polarizing layer 13, and a second 1 / 4 phase difference layer 14 stacked in sequence; one side of the display screen 1 is used to set an optical fingerprint recognition sensor 15, and the optical fingerprint recognition sensor 15 is located on the side of the display panel 11 away from the first 1 / 4 phase difference layer 12; the display screen 1 includes a display area 10. The display area 10 refers to an area where a picture can be displayed, and the display screen 1 also includes a non-display area, which refers to an area where a picture cannot be displayed. For example, a camera and a microphone can be placed in the non-display area. The non-display area can be a peripheral area outside the display area 10, or it can be an area within the display area 10. For example, a front camera can be set in a non-display area around the display area 10, or it can be set in a non-display area within the display area 10. The display area 10 includes a fingerprint recognition area 101 and a non-fingerprint recognition area 102. The fingerprint recognition area 101 overlaps with the optical fingerprint recognition sensor 15, and the non-fingerprint recognition area 102 does not overlap with the optical fingerprint recognition sensor 15. The user can place a finger on the fingerprint recognition area 101 to realize the fingerprint recognition function. The first 1 / 4 phase difference layer 12 covers the display area 10, that is, covers the fingerprint recognition area 101 and the non-fingerprint recognition area 102; the second 1 / 4 phase difference layer 14 overlaps with the non-fingerprint recognition area 102, for example, the second 1 / 4 phase difference layer 14 covers the non-fingerprint recognition area 102, and the second 1 / 4 phase difference layer 14 does not overlap with the fingerprint recognition area 101.

[0035] in, Figure 3 and Figure 4 The structure of the display screen 1 shown is only for illustrating the relative position relationship between the film layers, so as to facilitate understanding of the change in polarization direction during light propagation. Figure 3 and Figure 4 There may be no gap between the film layers, that is, the distance between adjacent film layers may be 0, and other film layer structures may be arranged between adjacent film layers. For example, an encapsulation layer may be arranged between the display panel 11 and the first 1 / 4 phase difference layer 12 to protect the display panel 11 and isolate the external water and oxygen. Figure 3 and Figure 4 The distance between the film layers is not limited. The propagation process of different types of light in the display screen 1 is described below.

[0036] When the ambient light enters the display screen 1, the ambient light will become, for example, horizontal linear polarized light (assuming that the polarization direction of the linear polarizing layer 13 is horizontal) after propagating downward through the linear polarizing layer 13. The horizontal linear polarized light will become, for example, left-handed circular polarized light after continuing to pass downward through the first 1 / 4 phase difference layer 12. The left-handed circular polarized light will become right-handed circular polarized light after being reflected in a structure such as metal in the display panel 11. The right-handed circular polarized light will become vertical linear polarized light after propagating upward through the first 1 / 4 phase difference layer 12. Since the right-handed circular polarized light is perpendicular to the polarization direction of the linear polarizing layer 13, it cannot pass through the linear polarizing layer 13. It can be seen that the cooperation between the first 1 / 4 phase difference layer and the linear polarizing layer 13 can reduce the reflection of the ambient light by the display screen 1, thereby improving the display effect.

[0037] During the process of fingerprint recognition under the screen, the user can place the finger at the position corresponding to the fingerprint recognition area 101 of the display screen 1 to realize the fingerprint recognition under the screen. The light used to illuminate the finger for fingerprint detection during the fingerprint recognition under the screen can come from the light generated when the display panel 11 displays the picture, or from the light generated by other devices in the display screen 1. After the light at the corresponding position of the fingerprint recognition area 101 of the display screen 1 passes through the linear polarization layer 13 upward, it is, for example, horizontal linear polarized light. After reaching the finger, the horizontal linear polarized light will be reflected to form fingerprint reflected light. The fingerprint reflected light is still horizontal linear polarized light, so it can pass through the linear polarization layer 13 and continue to propagate downward without being blocked by the linear polarization layer 13. The fingerprint reflected light can eventually reach the optical fingerprint recognition sensor 15 below the display panel 11. The light transmittance of the display panel 11 in the fingerprint recognition area 101 can be improved by some settings of the fingerprint recognition area 101 of the display panel 11, so that more fingerprint reflected light can pass through the display panel 11 to reach the optical fingerprint recognition sensor 15 below. When the light reaches the finger, the contrast of the fingerprint image will be generated due to the difference in light reflection between the fingerprint ridges and valleys, so that the optical fingerprint recognition sensor 15 can obtain the corresponding fingerprint image according to the fingerprint reflected light, thereby realizing the fingerprint recognition function. The fingerprint recognition function can be used to authenticate the user, and then realize fingerprint unlocking, fingerprint payment, etc.

[0038] When the display screen 1 displays an image, in the non-fingerprint recognition area 102, the light emitted upward from the display panel 11 becomes, for example, horizontal linear polarized light after passing through the linear polarizing layer 13, and the horizontal linear polarized light continues to pass upward through the second 1 / 4 phase difference layer 14 and then becomes circular polarized light for emission. It can be seen that in the non-fingerprint recognition area 102, the cooperation of the linear polarizing layer 13 and the second 1 / 4 phase difference layer can make the emitted light of the display screen 1 circularly polarized light, so as to achieve the eye protection effect.

[0039] In addition to the above-mentioned arrangement of the second 1 / 4 phase difference layer 14 not overlapping with the fingerprint recognition area 101 and overlapping with the non-fingerprint recognition area 102, other arrangements may also be made. In some possible implementations, for example Figure 5 and Figure 6 As shown, the second 1 / 4 phase difference layer 14 overlaps with the fingerprint recognition area 101 , and the second 1 / 4 phase difference layer 14 does not overlap with the non-fingerprint recognition area 102 . Figure 5 and Figure 6 The second 1 / 4 phase difference layer 14 shown in the figure can be arranged in coordination with other film layers, and can also enable the optical fingerprint recognition sensor 15 below the display screen 1 to obtain the fingerprint reflection light returned from the finger, and make the output light of the display screen 1 in the non-fingerprint recognition area 102 circularly polarized light.

[0040] In an embodiment of the present application, the display screen includes a display panel, a first 1 / 4 phase difference layer, a linear polarization layer, and a second 1 / 4 phase difference layer stacked in sequence, wherein the second 1 / 4 phase difference layer can be set to overlap with the non-fingerprint recognition area and not overlap with the fingerprint recognition area, or to overlap with the fingerprint recognition area and not overlap with the non-fingerprint recognition area. Through such a setting, the display screen can emit linear polarized light at a position corresponding to the fingerprint recognition area. The polarization direction of the fingerprint reflected light after the linear polarized light is reflected by the finger remains unchanged, and can still be transmitted through the linear polarization layer to the optical fingerprint recognition sensor under the display panel, thereby realizing optical-based under-screen fingerprint recognition, and the display screen can emit circularly polarized light at a position corresponding to the non-fingerprint recognition area. In other words, in a display screen that emits circularly polarized light, optical-based under-screen fingerprint recognition is realized, that is, the compatibility of optical-based under-screen fingerprint recognition is improved.

[0041] In some embodiments, Figure 5 and Figure 6 As shown, on the basis that the second 1 / 4 phase difference layer 14 overlaps with the fingerprint recognition area 101 and does not overlap with the non-fingerprint recognition area 102, the display screen 1 can also include a third 1 / 4 phase difference layer 16 located between the linear polarization layer 13 and the second 1 / 4 phase difference layer 14; the third 1 / 4 phase difference layer 16 covers the display area 10, that is, covers the fingerprint recognition area 101 and the non-fingerprint recognition area 102. Figure 5 The structure shown illustrates the propagation process of different types of light in the display screen 1 .

[0042] Figure 5 The process of ambient light entering the display screen 1 is similar to Figure 3 Similarly, after the ambient light enters the display screen 1, the polarization direction of the light reflected at the display panel 11 is perpendicular to the polarization direction of the linear polarization layer 13 before it reaches the linear polarization layer 13 upward, and is therefore blocked by the linear polarization layer 13, thereby reducing the reflection of the ambient light by the display screen 1 and improving the display effect.

[0043] like Figure 5 As shown, during the process of fingerprint identification under the screen, the light at the corresponding position of the fingerprint identification area 101 of the display screen 1 passes through the linear polarization layer 13 upwards and becomes, for example, horizontal linear polarized light. The horizontal linear polarized light continues to pass through the third 1 / 4 phase difference layer 16 upwards and becomes circularly polarized light. The circularly polarized light continues to pass through the second 1 / 4 phase difference layer 14 upwards and becomes linearly polarized light. The linear polarized light continues to reflect upwards and forms fingerprint reflected light after reaching the finger. The fingerprint reflected light is still linearly polarized light. The linear polarized light passes through the second 1 / 4 phase difference layer 14 downwards and becomes circularly polarized light. The circularly polarized light passes through the third 1 / 4 phase difference layer 16 downwards and becomes horizontal linear polarized light. Therefore, it can pass through the linear polarization layer 13 and continue to propagate downwards without being blocked by the linear polarization layer 13. The fingerprint reflected light can eventually reach the optical fingerprint identification sensor 15 under the display panel 11. Figure 5 The structure shown can realize optical-based under-screen fingerprint recognition.

[0044] like Figure 5 As shown, during the process of displaying an image on the display screen 1, in the non-fingerprint recognition area 102, the light emitted upward from the display panel 11 becomes, for example, horizontal linear polarized light after passing through the linear polarizing layer 13, and the horizontal linear polarized light continues to pass upward through the third 1 / 4 phase difference layer 16 and then becomes circularly polarized light. Since the second 1 / 4 phase difference layer 14 does not overlap with the non-fingerprint recognition area 102, it will not affect the circularly polarized light emitted from the display screen 1 at the position corresponding to the non-fingerprint recognition area 102.

[0045] In some embodiments, Figure 7 and Figure 8 As shown, the display screen 1 further includes: a cover plate 17 located on the side of the linear polarizing layer 13 away from the first 1 / 4 phase difference layer 12; the second 1 / 4 phase difference layer 14 is located on the side of the cover plate 17 away from the linear polarizing layer 13, or, as Fig. 9 and Fig.10 As shown, the second 1 / 4 phase difference layer 14 is located on a side of the cover plate 17 close to the linear polarizing layer 13 .

[0046] Among them, Figure 7and Fig. 9 In the structure shown in FIG. 1 , the second 1 / 4 phase difference layer 14 does not overlap with the fingerprint recognition area 101 and overlaps with the non-fingerprint recognition area 102. The specific principle can be referred to Figure 3 The corresponding description will not be repeated here; Figure 8 and Fig.10 In the structure shown, the second 1 / 4 phase difference layer 14 overlaps with the fingerprint recognition area 101 and does not overlap with the non-fingerprint recognition area 102, and a third 1 / 4 phase difference layer 16 is provided between the second 1 / 4 phase difference layer 14 and the linear polarization layer 13. The specific principle can be referred to Figure 5 The corresponding description is not repeated here. The cover plate 17 can be a glass cover plate (Cover Glass, CG), which is used to protect the display panel 11 and other structures on the outside of the display screen 1. The second 1 / 4 phase difference layer 14 needs to be patterned to achieve differences in the corresponding positions of the fingerprint recognition area 101 and the non-fingerprint recognition area 102. The second 1 / 4 phase difference layer 14 is arranged near the cover plate 17, which can facilitate the patterning process of the second 1 / 4 phase difference layer 14 on the cover plate 17 to avoid damage to other polarizing functional film layers caused by the patterning process, and the shape, size, position, etc. of the patterning can be flexibly controlled.

[0047] In some embodiments, the second 1 / 4 phase difference layer 14 is a coating layer on the cover plate 17 , that is, the patterned second 1 / 4 phase difference layer 14 is formed on the cover plate 17 by a coating process, and the process is simple.

[0048] In some embodiments, Figures 7 to 10 As shown, the display screen 1 further includes: a protective layer 18 , the second 1 / 4 phase difference layer 14 is located between the cover plate 17 and the protective layer 18 , and the protective layer 18 is used to compensate for the step difference between the second 1 / 4 phase difference layer 14 and the cover plate 17 .

[0049] Specifically, the protective layer 18 is a film layer without polarization function. On the one hand, the protective layer 18 can protect the second 1 / 4 phase difference layer 14. On the other hand, since the second 1 / 4 phase difference layer 14 does not cover the entire display area, but is a patterned film layer, there is a difference in the position corresponding to the fingerprint recognition area 101 and the non-fingerprint recognition area 102, thereby forming a film layer step difference on the cover plate 17. Therefore, the protective layer 18 can be used to compensate for the film layer step difference of the second 1 / 4 phase difference layer 14, so that the stack formed by the cover plate 17, the second 1 / 4 phase difference layer 14 and the protective layer 18 is a flat film layer structure.

[0050] In some embodiments, the protective layer 18 is a coating layer on the cover plate 17 and the second 1 / 4 phase difference layer 14 , that is, the protective layer 18 is formed on the stack of the second 1 / 4 phase difference layer 14 and the cover plate 17 by a coating process, and the process is simple.

[0051] The lamination process of the cover plate 17 , the second phase difference layer 14 and the protective layer 18 is described in detail below based on two examples.

[0052] To prepare Figure 7 and Fig. 9 As an example, the stack of the cover plate 17, the second phase difference layer 14 and the protective layer 18 shown in FIG. Fig.11 As shown, first, a cover plate 17 is obtained, and then a mask for making a second 1 / 4 phase difference layer is set. The mask has a shape corresponding to the fingerprint recognition area. For example, the mask has a circular structure corresponding to the fingerprint recognition area, covers the fingerprint recognition area, and has no mask structure in the non-fingerprint recognition area. Then, based on the mask, a patterned second 1 / 4 phase difference layer 14 is formed on the cover plate 17 through a coating process. Since the fingerprint recognition area is blocked by the mask, the second 1 / 4 phase difference layer 14 is a film layer with a hollow structure in the corresponding fingerprint recognition area. Then, a protective layer is formed on the stack of the cover plate 17 and the second 1 / 4 phase difference layer 14 through a coating process, that is, a stack of the cover plate 17, the second phase difference layer 14 and the protective layer 18 can be obtained, and the stack can be combined with other film layer structures to form the display screen 1.

[0053] To prepare Figure 8 and Fig.10 As an example, the stack of the cover plate 17, the second phase difference layer 14 and the protective layer 18 shown in FIG. Fig.12 As shown, first, a cover plate 17 is obtained, and then a mask for making a second 1 / 4 phase difference layer is set. The mask has a shape corresponding to the non-fingerprint recognition area. For example, the mask has a circular hollow structure corresponding to the fingerprint recognition area, covering the non-fingerprint recognition area. Then, based on the mask, a patterned second 1 / 4 phase difference layer 14 is formed on the cover plate 17 through a coating process. Since the non-fingerprint recognition area is blocked by the mask, the second 1 / 4 phase difference layer 14 is a local film layer corresponding to the fingerprint recognition area. Then, a protective layer is formed on the stack of the cover plate 17 and the second 1 / 4 phase difference layer 14 through a coating process, that is, a stack of the cover plate 17, the second phase difference layer 14 and the protective layer 18 can be obtained, and the stack can be combined with other film layer structures to form the display screen 1.

[0054] In some embodiments, the second 1 / 4 phase difference layer 14 includes multiple stacked layers with different refractive indices, that is, the second 1 / 4 phase difference layer 14 is composed of multiple stacked layers with different refractive indices. By adjusting the thickness and material refractive index of different layers, the phase delay function can be conveniently achieved.

[0055] In some embodiments, Figure 2As shown, the non-fingerprint recognition area 102 surrounds the fingerprint recognition area 101, so that the user can make full use of the display area 10 to realize the fingerprint recognition under the screen; the display panel 11 is an organic light-emitting diode (OLED) panel. Compared with other types such as liquid crystal display (LCD), OLED panels are easier to set with higher light transmittance, so they are more suitable for realizing fingerprint recognition under the screen. It can be understood that in other possible embodiments, the display panel 11 can also be an LCD or other types of display panels.

[0056] In some embodiments, Figure 3 , Figure 4 , Figure 7 , Fig. 9 and Fig.11 As shown, the second 1 / 4 phase difference layer 14 overlaps with the non-fingerprint recognition area 102, the second 1 / 4 phase difference layer 14 does not overlap with the fingerprint recognition area 101, and the second 1 / 4 phase difference layer 14 has a hollow structure corresponding to the fingerprint recognition area 101, and the edge of the hollow structure is one of a circle, a square, a rectangle and a diamond, and only a circle is illustrated in the figure;

[0057] Or, if Figure 5 , Figure 6 , Figure 8 , Fig.10 and Fig.12 As shown, the second 1 / 4 phase difference layer 14 overlaps with the fingerprint recognition area 101, and the second 1 / 4 phase difference layer 14 does not overlap with the non-fingerprint recognition area 102. The second 1 / 4 phase difference layer 14 has an outer edge corresponding to the fingerprint recognition area 101, and the outer edge is one of a circle, a square, a rectangle and a diamond, and only a circle is illustrated in the figure.

[0058] An embodiment of the present application also provides an electronic device, including the above-mentioned display screen 1; an optical fingerprint recognition sensor 15 corresponding to the fingerprint recognition area 101 of the display screen 1, the optical fingerprint recognition sensor 15 is located on the side of the display panel 11 away from the first 1 / 4 phase difference layer 12, the non-fingerprint recognition area 102 does not overlap with the optical fingerprint recognition sensor 15, and the fingerprint recognition area 101 overlaps with the optical fingerprint recognition sensor 15.

[0059] Fig.13 A schematic structural diagram of an electronic device 100 is shown.

[0060] The electronic device 100 may include a processor 110, an internal memory 121, a sensor module 180, a display screen 1, etc. The sensor module 180 may include an optical fingerprint recognition sensor 15, etc.

[0061] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine some components, or separate some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0062] The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0063] The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of instruction fetching and execution.

[0064] The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0065] The electronic device 100 implements the display function through a GPU, a display screen 1, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 1 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs, which execute program instructions to generate or change display information.

[0066] The display screen 1 is used to display images, videos, etc. The display screen 1 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, a quantum dot light emitting diode (QLED), etc. In some embodiments, the electronic device 100 may include 1 or N display screens 1, where N is a positive integer greater than 1.

[0067] The internal memory 121 can be used to store computer executable program codes, which include instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the electronic device 100 (such as audio data, a phone book, etc.), etc. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 110 executes various functional applications and data processing of the electronic device 100 by running instructions stored in the internal memory 121, and / or instructions stored in a memory provided in the processor.

[0068] The optical fingerprint recognition sensor 15 is used to collect fingerprints. The electronic device 100 can use the collected fingerprint characteristics to achieve fingerprint unlocking, access application locks, fingerprint photography, fingerprint call answering, etc.

[0069] The electronic device 100 in the embodiment of the present application may be a device capable of realizing an under-screen fingerprint recognition function, such as a mobile phone, a tablet computer, a desktop, a laptop, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, a netbook, a personal digital assistant (PDA), a wearable electronic device, a vehicle-mounted electronic device, etc.

[0070] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in this application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integration. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk), etc.

[0071] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0072] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display screen, characterized in that: include: A display panel, a first 1 / 4 phase difference layer, a linear polarizing layer, and a second 1 / 4 phase difference layer are stacked in sequence; The display screen includes a display area, the display area includes a fingerprint recognition area and a non-fingerprint recognition area, and the first 1 / 4 phase difference layer covers the display area; The second 1 / 4 phase difference layer overlaps with the non-fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the fingerprint recognition area; Alternatively, the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area.

2. The display screen according to claim 1, characterized in that: The second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, and the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area; The display screen further includes a third 1 / 4 phase difference layer located between the linear polarization layer and the second 1 / 4 phase difference layer; The third 1 / 4 phase difference layer covers the display area.

3. The display screen according to claim 1 or 2, characterized in that: Also includes: A cover plate located on a side of the linear polarizing layer away from the first 1 / 4 phase difference layer; The second 1 / 4 phase difference layer is located on a side of the cover plate close to the linear polarizing layer or a side of the cover plate far from the linear polarizing layer.

4. The display screen according to claim 3, characterized in that: The second 1 / 4 phase difference layer is a coating layer on the cover plate.

5. The display screen according to claim 4, characterized in that: Also includes: The second 1 / 4 phase difference layer is located between the cover plate and the protective layer, and the protective layer is used to compensate for the step difference between the second 1 / 4 phase difference layer and the cover plate.

6. The display screen according to claim 5, characterized in that: The protective layer is a coating layer on the cover plate and the second 1 / 4 phase difference layer.

7. The display screen according to claim 1, characterized in that: The second 1 / 4 phase difference layer includes a plurality of stacked layers having different refractive indices.

8. The display screen according to claim 1, characterized in that: The non-fingerprint recognition area surrounds the fingerprint recognition area; The display panel is an organic light emitting display (OLED) panel.

9. The display screen according to claim 1, characterized in that: The second 1 / 4 phase difference layer overlaps with the non-fingerprint recognition area, the second 1 / 4 phase difference layer does not overlap with the fingerprint recognition area, the second 1 / 4 phase difference layer has a hollow structure corresponding to the fingerprint recognition area, and the edge of the hollow structure is one of a circle, a square, a rectangle and a rhombus; Alternatively, the second 1 / 4 phase difference layer overlaps with the fingerprint recognition area, the second 1 / 4 phase difference layer does not overlap with the non-fingerprint recognition area, and the second 1 / 4 phase difference layer has an outer edge corresponding to the fingerprint recognition area, and the outer edge is one of a circle, a square, a rectangle and a diamond.

10. An electronic device, characterized in that: A display screen comprising any one of claims 1 to 9; An optical fingerprint recognition sensor corresponding to the fingerprint recognition area of ​​the display screen, wherein the optical fingerprint recognition sensor is located on a side of the display panel away from the first 1 / 4 phase difference layer.

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