Display module and display device

Abstract

The present invention discloses a display module and a display device, and relates to the field of display technology. The display module comprises: a display panel, the display panel comprises a display area and a non-display area; a backlight module, the backlight module comprises an iron frame, and the iron frame forms an accommodating space; a fingerprint recognition unit, the fingerprint recognition unit is located in the accommodating space, and the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located in the non-display area; a light guide component, the light guide component is located in the accommodating space, and along the direction perpendicular to the plane where the display panel is located, the light guide component and the non-display area are at least partially overlapped, in the light guide component, the first light entrance and exit surface faces the fingerprint recognition unit, the second light entrance and exit surface is located at one end of the light guide component close to the display area, and along the direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface is located on the side of the light guide component facing the display panel. The present invention is conducive to improving the accuracy of fingerprint recognition.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more specifically, to a display module and a display device. Background Art

[0002] With the development of display technology and full-screen technology, display panels with fingerprint recognition functions have gradually spread to every corner of our lives. Since fingerprints are innate and unique features that can be distinguished from others, in-screen fingerprint recognition technology with a high screen-to-body ratio is widely used in the display screens of electronic devices such as mobile phones and tablets to achieve identity verification.

[0003] At present, fingerprint recognition technology mainly recognizes fingerprints by detecting the intensity difference of light reflected from the valley ridges of fingerprints. The fingerprint recognition unit is usually set on the side of the backlight module away from the display panel. The reflected light carrying fingerprint information penetrates the display panel and the backlight module in turn and is finally received by the fingerprint sensor. However, the area corresponding to the iron frame of the backlight module and the fingerprint recognition unit needs to be set with an opening to allow light to pass through. The opening on the iron frame of the backlight module will affect the flatness of the film material in the backlight module, making the gap between the film materials in the backlight module uneven and generating Newton rings. The generation of Newton rings will interfere with the fingerprint sensor and reduce the accuracy of fingerprint recognition. Summary of the invention

[0004] In view of this, the present invention provides a display module and a display device, which are beneficial to improving the accuracy of fingerprint recognition.

[0005] The present invention provides a display module, comprising: a display panel, the display panel comprising a display area and a non-display area surrounding the display area; a backlight module, the backlight module is located on a side of the display panel away from its light emitting surface, the backlight module comprises an iron frame, and the iron frame forms an accommodating space; a fingerprint recognition unit, the fingerprint recognition unit is located in the accommodating space, and the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located in the non-display area, the fingerprint recognition unit comprises a fingerprint recognition light source and a photosensitive element; a light guide component, the light guide component is located in the accommodating space, and along a direction perpendicular to the plane where the display panel is located, the light guide component at least partially overlaps with the non-display area, the light guide component comprises a first light entrance and exit surface and a second light entrance and exit surface, the first light entrance and exit surface faces the fingerprint recognition unit, the second light entrance and exit surface is located at one end of the light guide component close to the display area, and along a direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface is located on a side of the light guide component facing the display panel.

[0006] Based on the same concept, the present invention further provides a display device, including the display module provided by the present invention.

[0007] Compared with the prior art, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0008] In the present invention, the fingerprint recognition unit is located in the accommodating space, that is, the fingerprint recognition unit is arranged in the accommodating space formed by the iron frame, so there is no need to set a hole on the iron frame, thereby enhancing the support of the iron frame to the film material in the accommodating space, effectively suppressing the generation of Newton rings, and being beneficial to improving the accuracy of fingerprint recognition. In addition, in the present invention, the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located in the non-display area, avoiding the setting of the fingerprint recognition unit from affecting the flatness of the portion of the film material in the accommodating space located in the display area, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the accuracy of fingerprint recognition. The display module also includes a light guide component, which is located in the accommodating space, and along the direction perpendicular to the plane where the display panel is located, the light guide component and the non-display area are at least partially overlapped, that is, the light guide component is at least partially located in the area corresponding to the non-display area in the accommodating space, effectively reducing the influence of the setting of the light guide component on the flatness of the portion of the film material in the accommodating space located in the display area, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the accuracy of fingerprint recognition.

[0009] At the same time, the light guide component includes a first light entrance and exit surface and a second light entrance and exit surface. The first light entrance and exit surface faces the fingerprint recognition unit, and the second light entrance and exit surface is located at one end of the light guide component close to the display area, and along the direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface is located on the side of the light guide component facing the display panel. The light emitted by the fingerprint recognition light source in the fingerprint recognition unit enters the light guide component through the first light entrance and exit surface, and the light can be emitted from the second light entrance and exit surface through the conduction of the light guide component. Since the second light entrance and exit surface is located on the side of the light guide component facing the display panel along the direction perpendicular to the plane where the display panel is located, the light can be emitted from the light exit surface of the display panel. And since the second light entrance and exit surface is located at one end of the light guide component close to the display area, it is conducive to the light being emitted from the fingerprint recognition area in the display area. Similarly, the light reflected by the touch subject can enter the light guide component through the second light entrance and exit surface, and the light can be emitted from the first light entrance and exit surface through the conduction of the light guide component, so that the light sensing element in the fingerprint recognition unit can receive the light reflected by the touch subject to realize fingerprint recognition.

[0010] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

[0011] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0013] Figure 1It is a planar schematic diagram of a display module provided by the present invention;

[0014] Figure 2 yes Figure 1 A cross-sectional view of the display module along the line AA';

[0015] Figure 3 It is a structural schematic diagram of the light guide component provided by the present invention;

[0016] Figure 4 It is a stereoscopic diagram of the light guide component provided by the present invention;

[0017] Figure 5 yes Figure 1 Another cross-sectional view of the display module along line AA';

[0018] Figure 6 It is a planar schematic diagram of the fingerprint recognition unit provided by the present invention;

[0019] Figure 7 yes Figure 1 Another cross-sectional view of the display module along line AA';

[0020] Figure 8 is another structural schematic diagram of the light guide component provided by the present invention;

[0021] Fig. 9 is another stereoscopic view of the light guide component provided by the present invention;

[0022] Fig.10 is another plan view schematic diagram of the fingerprint recognition unit provided by the present invention;

[0023] Fig.11 This is another structural schematic diagram of the light guide component provided by the present invention;

[0024] Fig.12 This is another structural schematic diagram of the light guide component provided by the present invention;

[0025] Fig.13 It is a plan schematic diagram of a display device provided by the present invention. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] Figure 1 is a plan view of a display module provided by the present invention, Figure 2 yes Figure 1 A cross-sectional view of the display module along the line AA', referring to Figure 1 and Figure 2 , this embodiment provides a display module, the display module includes a display panel 10, the display panel 10 includes a display area AA and a non-display area NA surrounding the display area AA, the display area AA is used for display, and the non-display area NA is not used for display and can be used to set circuits and other structures. Optionally, the display area AA is divided into a fingerprint recognition area Z and a non-fingerprint recognition area FZ, and the areas in the display area AA except the fingerprint recognition area Z are all non-fingerprint recognition areas FZ. The fingerprint recognition function can be realized by placing a finger in the fingerprint recognition area Z of the display panel 10. Of course, Figure 1 It is only used to illustrate a position relationship of the fingerprint identification area Z in the display area AA. In some other embodiments of the present application, the fingerprint identification area Z can also be located at any other position of the display area AA, and Figure 1 The size of the fingerprint identification area Z is not limited. In some other embodiments of the present application, the fingerprint identification area Z may also overlap with the display area AA.

[0032] The display module further includes a backlight module 20 . The backlight module 20 is located at a side of the display panel 10 away from the light emitting surface thereof. The backlight module 20 includes an iron frame 21 . The iron frame 21 forms an accommodating space 201 .

[0033] The display module further includes a fingerprint recognition unit 30, which includes a fingerprint recognition light source 31 and a light sensing element 32. Optionally, the light sensing element 32 is a fingerprint sensor, and the fingerprint recognition light source 31 can be used as a light source for fingerprint detection and recognition. Exemplarily, the fingerprint recognition light source 31 can be an infrared LED.

[0034] In the prior art, the fingerprint recognition unit is usually arranged on the outside of the iron frame. In order to realize the normal operation of the fingerprint recognition unit, it is necessary to set a hole in the area corresponding to the fingerprint recognition unit in the iron frame so that light can be transmitted. The setting of the hole in the iron frame will affect the support of the iron frame for the film material in the backlight module. When the touch subject presses, it will affect the flatness of the film material in the backlight module, which is easy to cause uneven gaps between the film materials in the backlight module, thereby generating Newton's rings. Newton's rings, also known as "Newton's circles", are a typical equal thickness interference phenomenon. For example, when the light guide plate in the backlight module is warped due to electrostatic adsorption or pressing by the touch subject, a wedge-shaped air gap is formed around the contact point in the middle of the reflective layer located on the side close to the iron frame. When the infrared light reflected back by the touch subject is vertically incident, there is an optical path difference between the light reflected from the upper surface of the air gap and the light reflected from the lower surface of the air gap, and interference occurs, thereby superimposing interference fringes on the lower surface of the reflective layer, generating concentric rings of light and dark, that is, Newton's rings. The generation of Newton rings will affect the accuracy of fingerprint recognition.

[0035] In the embodiment of the present application, the fingerprint recognition unit 30 is located in the accommodating space 201, that is, the fingerprint recognition unit 30 is arranged in the accommodating space 201 formed by the iron frame 21, so there is no need to set a hole on the iron frame 21, thereby enhancing the support of the iron frame 21 for the membrane material in the accommodating space 201, effectively suppressing the generation of Newton rings, and being beneficial to improving the fingerprint recognition accuracy.

[0036] In the embodiment of the present application, the vertical projection of the fingerprint recognition unit 30 on the plane where the display panel 10 is located is located in the non-display area NA, so as to avoid the setting of the fingerprint recognition unit 30 affecting the flatness of the portion of the film material in the accommodating space 201 located in the display area AA, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the fingerprint recognition accuracy.

[0037] The display module also includes a light guide component 40, which is located in the accommodating space 201, and along a direction perpendicular to the plane where the display panel 10 is located, the light guide component 40 at least partially overlaps with the non-display area NA, that is, the light guide component 40 is at least partially located in the area corresponding to the non-display area NA in the accommodating space 201, which effectively reduces the influence of the setting of the light guide component 40 on the flatness of the portion of the film material in the accommodating space 201 located in the display area AA, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the accuracy of fingerprint recognition.

[0038] At the same time, the light guide component 40 includes a first light entrance and exit surface 41 and a second light entrance and exit surface 42. The first light entrance and exit surface 41 faces the fingerprint recognition unit 30, and the second light entrance and exit surface 42 is located at one end of the light guide component 40 close to the display area AA, and along the direction perpendicular to the plane where the display panel 10 is located, the second light entrance and exit surface 42 is located on the side of the light guide component 40 facing the display panel 10. The light emitted by the fingerprint recognition light source 31 in the fingerprint recognition unit 30 enters the light guide component 40 through the first light entrance and exit surface 41, and the light can be emitted from the second light entrance and exit surface 42 through the conduction of the light guide component 40. Since the second light entrance and exit surface 42 is located on the side of the light guide component 40 facing the display panel 10 along the direction perpendicular to the plane where the display panel 10 is located, the light can be emitted from the light exit surface of the display panel 10. And since the second light entrance and exit surface 42 is located at one end of the light guide component 40 close to the display area AA, it is beneficial for the light to be emitted from the fingerprint recognition area Z in the display area AA. Similarly, the light reflected by the touching subject can enter the light guide component 40 through the second light entrance and exit surface 42, and the light can be emitted from the first light entrance and exit surface 41 through the conduction of the light guide component 40, so that the photosensitive element 32 in the fingerprint recognition unit 30 can receive the light reflected by the touching subject to realize fingerprint recognition.

[0039] It should be noted that Figure 2 It is only used to illustrate a positional relationship between the light guide member 40 and the non-display area NA. Figure 2 The overlapping area between the light guide component 40 and the non-display area NA along the direction perpendicular to the plane where the display panel 10 is located is not limited. In some other embodiments of the present application, the overlapping area between the light guide component 40 and the non-display area along the direction perpendicular to the plane where the display panel 10 is located can be set according to actual production requirements.

[0040] Figure 3 is a structural schematic diagram of a light guide component provided by the present invention, Figure 4 is a stereogram of the light guide component provided by the present invention, referring to Figure 1-Figure 4 In some optional embodiments, the light guide component 40 includes a first surface 401 and a second surface 402 that are arranged opposite to each other, and a first side wall 403 connecting the first surface 401 and the second surface 402. In the direction perpendicular to the plane where the display panel 10 is located, the first surface 401 is located on a side of the light guide component 40 close to the display panel 10, the second surface 402 is located on a side of the light guide component 40 away from the display panel 10, and along the direction from the non-display area NA to the display area AA, the first side wall 403 is located on a side of the light guide component 40 close to the display area AA.

[0041] The second light entrance and exit surface 42 is located at one end of the first surface 401 close to the display area AA, which is conducive to the light being emitted from the fingerprint identification area Z in the display area AA, thereby facilitating fingerprint identification.

[0042] A first reflective layer 51 is provided on the first side wall 403. When light is directed toward the first reflective layer 51, it is reflected. The angle between the first surface 401 and the first side wall 403 is less than 90°. Correspondingly, the angle between the first reflective layer 51 and the first surface 401 is also less than 90°. In addition, in a direction perpendicular to the plane where the display panel 10 is located, the second light entrance and exit surface 42 and the first reflective layer 51 at least partially overlap, so that the light in the light guide component 40 can be reflected by the first reflective layer 51 and then emitted from the second light entrance and exit surface 42. Since the second light entrance and exit surface 42 is located on the side of the light guide component 40 facing the display panel 10 in the direction perpendicular to the plane where the display panel 10 is located, the light can be emitted from the light exit surface of the display panel 10. Similarly, the light reflected by the touching subject can be emitted toward the first reflecting layer 51 through the second light input and output surface 42. After being reflected by the first reflecting layer 51, the light is emitted toward the interior of the light guide component 40. The light can be emitted from the first light input and output surface 41 through the conduction of the light guide component 40. Thus, the photosensitive element 32 in the fingerprint recognition unit 30 can receive the light reflected by the touching subject to realize fingerprint recognition.

[0043] Optionally, the vertical projection of the first reflective layer 51 on the plane where the display panel 10 is located is located within the vertical projection of the second light entrance and exit surface 42 on the plane where the display panel 10 is located, which is beneficial to increase the amount of light entering and exiting the light guide component 40 through the second light entrance and exit surface 42 and the first reflective layer 51, thereby improving the accuracy of fingerprint recognition.

[0044] Figure 5 yes Figure 1 Another cross-sectional view of the display module along line AA', see Figure 1 and Figure 5 In some optional embodiments, the vertical projection of the light guide component 40 on the plane where the display panel 10 is located is located in the non-display area NA, that is, the light guide component 40 is only arranged in the area corresponding to the non-display area NA in the accommodating space 201, which effectively avoids the setting of the light guide component 40 affecting the flatness of the part of the film material in the accommodating space 201 located in the display area AA, effectively suppresses the generation of Newton rings, and is beneficial to improving the accuracy of fingerprint recognition.

[0045] Moreover, the angle between the first surface 401 and the first side wall 403 is less than 45°, and correspondingly, the angle between the first reflective layer 51 and the first surface 401 is also less than 45°, so that the light in the light-guiding component 40 is deflected toward the direction close to the display area AA after being reflected by the first reflective layer 51, so that even if the light-guiding component 40 is only arranged in the area corresponding to the non-display area NA in the accommodating space 201, the light emitted by the fingerprint recognition light source 31 in the fingerprint recognition unit 30 is deflected toward the direction close to the display area AA after being reflected by the first reflective layer 51, and because the first reflective layer 51 is located on the side of the light-guiding component 40 close to the display area AA, the light can be emitted from the display area AA, which is conducive to fingerprint recognition in the display area AA.

[0046] Continue to refer Figure 1 , Figure 3-Figure 5 In some optional embodiments, the iron frame 21 includes a bottom plate 211, and the light guide component 40 and the fingerprint recognition unit 30 are both fixed to a side of the bottom plate 211 close to the display panel 10. Optionally, the light guide component 40 and the fingerprint recognition unit 30 can be attached to the bottom plate 211 by glue.

[0047] The fingerprint recognition unit 30 is located between the light guide member 40 and the bottom plate 211 .

[0048] The light guide component 40 further includes a second side wall 404 connecting the first surface 401 and the second surface 402 , and pointing from the non-display area NA to the display area AA. The second side wall 404 is located on a side of the light guide component 40 away from the display area AA, and a second reflective layer 52 is disposed on the second side wall 404 .

[0049] The angle between the second surface 402 and the second side wall 404 is less than 90°. Correspondingly, the angle between the second reflective layer 52 and the second surface 402 is also less than 90°.

[0050] The first light entrance and exit surface 41 is located on the second surface 402, the vertical projection of the fingerprint recognition unit 30 on the plane where the display panel 10 is located is located within the vertical projection of the first light entrance and exit surface 41 on the plane where the display panel 10 is located, and the vertical projection of the fingerprint recognition unit 30 on the plane where the display panel 10 is located is located within the vertical projection of the second reflective layer 52 on the plane where the display panel 10 is located.

[0051] Specifically, most of the light emitted by the fingerprint recognition light source 31 in the fingerprint recognition unit 30 can be directed toward the second reflection layer 52 through the first light-input and light-output surface 41, and the part of the light can be reflected on the second reflection layer 52, and the reflected light can be directed toward the first reflection layer 51, and the light can be reflected again on the first reflection layer 51, and the reflected light can be emitted from the light-exit surface of the display panel 10 through the second light-input and light-output surface 42. Similarly, most of the light reflected by the touch subject can be directed toward the first reflection layer 51 through the second light-input and light-output surface 42, and the light can be reflected on the first reflection layer 51, and the reflected light can be directed toward the second reflection layer 52, and the light can be reflected again on the second reflection layer 52, and the reflected light can be directed toward the photosensitive element 32 in the fingerprint recognition unit 30 through the first light-input and light-output surface 41, so that the photosensitive element 32 in the fingerprint recognition unit 30 can receive the light reflected by the touch subject, thereby realizing fingerprint recognition.

[0052] Figure 6 is a plan view of a fingerprint recognition unit provided by the present invention, referring to Figure 1 , Figure 5 and Figure 6 In some optional embodiments, the fingerprint recognition light source 31 and the photosensitive element 32 do not overlap in a direction perpendicular to the plane where the display panel 10 is located, so as to prevent the light emitted by the fingerprint recognition light source 31 from being directly emitted to the photosensitive element 32 after being reflected by the second reflective layer 52, thereby effectively improving the fingerprint recognition accuracy.

[0053] It should be noted that Figure 6 It is exemplarily shown that the fingerprint recognition unit 30 includes two fingerprint recognition light sources 31 and one photosensitive element 32. In other embodiments of the present invention, the fingerprint recognition unit 30 may also include other numbers of fingerprint recognition light sources 31 and photosensitive elements 32. The fingerprint recognition light sources 31 and photosensitive elements 32 may also be arranged in other ways, which will not be elaborated in the present invention.

[0054] Figure 7 yes Figure 1 Another cross-sectional view of the display module along line AA', Figure 8 is another structural schematic diagram of the light guide component provided by the present invention, Fig. 9 is another stereogram of the light guide component provided by the present invention, referring to Figure 1 , Figure 7-Figure 9 In some optional embodiments, the backlight module 20 also includes a plastic frame 22. The iron frame 21 in the backlight module 20 includes a bottom plate 211 and a side plate 212. The plastic frame 22 is located on the side of the side plate 212 close to the accommodating space 201. The structure of the combination of the plastic frame 22 and the iron frame 21 in the backlight module 20 can effectively improve the strength of the backlight module 20.

[0055] The light guide component 40 is fixed to the side of the bottom plate 211 close to the display panel 100, and the fingerprint recognition unit 30 is fixed to the side of the plastic frame 22 close to the accommodating space 201. Optionally, the light guide component 40 can be glued to the bottom plate 211, and the fingerprint recognition unit 30 can also be glued to the plastic frame 22.

[0056] The light guide component 40 also includes a second side wall 404 connecting the first surface 401 and the second surface 402 , and pointing along the non-display area NA toward the display area AA. The second side wall 404 is located on a side of the light guide component 40 away from the display area AA, and is the first light entrance and exit surface 41 .

[0057] The vertical projection of the fingerprint recognition unit 30 on the plane where the side panel 212 is located is located within the vertical projection of the first light entrance and exit surface 41 on the plane where the side panel 212 is located, and the vertical projection of the fingerprint recognition unit 30 on the plane where the side panel 212 is located is located within the vertical projection of the second reflective layer 51 on the plane where the side panel 212 is located.

[0058] Specifically, most of the light emitted by the fingerprint recognition light source 31 in the fingerprint recognition unit 30 can be incident into the light guide component 40 through the first light entrance and exit surface 41, and directly incident to the first reflective layer 51. This part of the light can be reflected on the first reflective layer 51, and the reflected light can be emitted from the light exit surface of the display panel 10 through the second light entrance and exit surface 42. Similarly, most of the light reflected by the touch subject can be incident to the first reflective layer 51 through the second light entrance and exit surface 42, and the light can be reflected on the first reflective layer 51. The reflected light enters the light guide component 40 and incident to the light sensing element 32 in the fingerprint recognition unit 30 through the first light entrance and exit surface 41, so that the light sensing element 32 in the fingerprint recognition unit 30 can receive the light reflected by the touch subject, thereby realizing fingerprint recognition.

[0059] Fig.10 is another plan view of the fingerprint recognition unit provided by the present invention, referring to Figure 1 , Figure 7 and Fig.10 In some optional embodiments, the fingerprint recognition light source 31 and the light sensing element 32 do not overlap in a direction perpendicular to the plane where the side panel 212 is located, thereby preventing the light emitted by the fingerprint recognition light source 31 from directly irradiating the light sensing element 32, thereby effectively improving the fingerprint recognition accuracy.

[0060] It should be noted that Fig.10 It is exemplarily shown that the fingerprint recognition unit 30 includes two fingerprint recognition light sources 31 and one photosensitive element 32. In other embodiments of the present invention, the fingerprint recognition unit 30 may also include other numbers of fingerprint recognition light sources 31 and photosensitive elements 32. The fingerprint recognition light sources 31 and photosensitive elements 32 may also be arranged in other ways, which will not be elaborated in the present invention.

[0061] Fig.11 is another structural schematic diagram of the light guide component provided by the present invention, referring to Figure 1 , Figure 5 and Fig.11 In some optional embodiments, in the light-guiding component 40, the first surface 401 is provided with a first microstructure 61 in at least a partial area, and the second light entrance and exit surface 42 and the first microstructure 61 do not overlap in a direction perpendicular to the plane where the display panel 10 is located, that is, the first microstructure 61 can be provided in an area other than the second light entrance and exit surface 42 on the first surface 401, and the first microstructure 61 is not provided on the second light entrance and exit surface 42, and the setting of the first microstructure 61 does not affect the light entering and exiting the second light entrance and exit surface 42.

[0062] A second microstructure 62 is disposed on at least a portion of the second surface 402 , and along a direction perpendicular to the plane where the display panel 10 is located, the first light entrance and exit surface 41 and the second microstructure 62 do not overlap, and the second microstructure 62 does not affect the light entering and exiting the first light entrance and exit surface 41 .

[0063] In addition, at least a partial area of ​​the first surface 401 is provided with a first microstructure 61, and at least a partial area of ​​the second surface 402 is provided with a second microstructure 62, so that part of the light emitted by the fingerprint recognition light source 31 that cannot be transmitted inside the light guide component 40 through reflection by the first reflection layer 51 and / or the second reflection layer 52 can be transmitted inside the light guide component 40 through total reflection on the first microstructure 61 and the second microstructure 62, thereby being beneficial to increasing the number of light rays emitted by the fingerprint recognition light source 31 that enter and exit the first light entrance and exit surface 41 and the second light entrance and exit surface 42, and thereby beneficial to improving the fingerprint recognition accuracy.

[0064] It should be noted that Fig.11 exemplarily shows that when the first light entrance and exit surface 41 is disposed on the second surface 402, the second microstructure 62 can be disposed on the second surface 402 except for the area where the first light entrance and exit surface 41 is disposed. Fig.12 , Fig.12 4 is another structural schematic diagram of the light guide component provided by the present invention. When the second side wall 404 is the first light entrance and exit surface 41, the second microstructure 62 can be set on the entire second surface 402. Of course, in other embodiments of the present invention, the second microstructure 62 can also be set in other areas on the second surface 402 according to actual production requirements, and the present invention will not be repeated here.

[0065] Continue to refer Fig.11In some optional embodiments, the material of the first microstructure 61 can be at least one of polymethyl methacrylate, polycarbonate, glass and resin. When part of the light in the light guide component 40 is directed to the first microstructure 61, it can be totally reflected on the first microstructure 61. The material of the second microstructure 62 can also be at least one of polymethyl methacrylate, polycarbonate, glass and resin. When part of the light in the light guide component 40 is directed to the second microstructure 62, it can be totally reflected on the second microstructure 62. Therefore, the light can be totally reflected on the first microstructure 61 and the second microstructure 62 to achieve the internal conduction of the light guide component 40.

[0066] It should be noted that the present embodiment exemplarily shows that the material of the first microstructure 61 can be at least one of polymethyl methacrylate, polycarbonate, glass and resin, and the material of the second microstructure 62 can also be at least one of polymethyl methacrylate, polycarbonate, glass and resin. In other embodiments of the present invention, the first microstructure 61 and the second microstructure 62 can also be made of other materials, which will not be elaborated one by one in the present invention.

[0067] refer to Figure 1 , Figure 3 and Figure 5 In some optional embodiments, a third reflective layer 53 is provided on at least a portion of the first surface 401, and the second light entrance and exit surface 42 and the third reflective layer 53 do not overlap in a direction perpendicular to the plane where the display panel 10 is located, that is, the third reflective layer 53 can be provided in an area other than the second light entrance and exit surface 42 on the first surface 401, and the third reflective layer 53 is not provided on the second light entrance and exit surface 42, and the provision of the third reflective layer 53 does not affect the light entering and exiting the second light entrance and exit surface 42.

[0068] A fourth reflective layer 54 is disposed on at least a portion of the second surface 402 , and the first light entrance and exit surface 41 and the fourth reflective layer 54 do not overlap in a direction perpendicular to the plane where the display panel 10 is located. The fourth reflective layer 54 does not affect light entering and exiting the first light entrance and exit surface 41 .

[0069] A third reflection layer 53 is provided on at least a partial area of ​​the first surface 401, and a fourth reflection layer 54 is provided on at least a partial area of ​​the second surface 402, so that part of the light emitted by the fingerprint recognition light source 31 that cannot be transmitted inside the light guide component 40 through reflection by the first reflection layer 51 and / or the second reflection layer 52 can be transmitted inside the light guide component 40 through reflection on the third reflection layer 53 and the fourth reflection layer 54, which is beneficial to increase the number of light rays emitted by the fingerprint recognition light source 31 that enter and exit the first light entrance and exit surface 41 and the second light entrance and exit surface 42, and is beneficial to improving the fingerprint recognition accuracy.

[0070] It should be noted that Figure 3exemplarily shows that when the first light entrance and exit surface 41 is disposed on the second surface 402, the fourth reflective layer 54 may be disposed on the second surface 402 except for the area where the first light entrance and exit surface 41 is disposed. Figure 8 , when the second side wall 404 is the first light entrance and exit surface 41, the fourth reflective layer 54 can be disposed on the entire second surface 402. Of course, in other embodiments of the present invention, the fourth reflective layer 54 can also be disposed in other areas on the second surface 402 according to actual production requirements, and the present invention will not be repeated here.

[0071] Continue to refer Figure 1 , Figure 3-Figure 5 In some optional embodiments, the light-guiding component 40 also includes a third side wall 405 connected to the first surface 401 and the second surface 402. The third side wall 405 is also connected to the first side wall 403. A light-shielding layer (not shown in the figure) or a fifth reflective layer (not shown in the figure) is provided on the third side wall 405 to prevent external light from entering the interior of the light-guiding component 40, which is beneficial to improving the accuracy of fingerprint recognition.

[0072] Continue to refer Figure 1 and Figure 5 In some optional embodiments, the backlight module 20 includes a light guide plate 23 and a light source assembly 24 located in the accommodating space 201, and the vertical projection of the light source assembly 24 on the plane where the display panel 10 is located is located in the non-display area NA. Along the direction perpendicular to the plane where the display panel 10 is located, the light guide component 40 and the fingerprint recognition unit 30 are located between the light guide plate 23 and the iron frame 21.

[0073] Along the direction perpendicular to the plane where the display panel 10 is located, the light guide component 40 and / or the fingerprint recognition unit 30 partially overlap with the light source assembly 24, that is, the light guide component 40 and / or the fingerprint recognition unit 30 can be at least partially arranged in the area where the light source assembly 24 is located, effectively reducing the area of ​​the non-display area NA, which is conducive to achieving a narrow frame.

[0074] Continue to refer Figure 1 and Figure 5 In some optional embodiments, the backlight module 20 further includes a reflective sheet 25 located in the accommodating space 201 , and the reflective sheet 25 is located on a side of the light guide plate 23 away from the display panel 10 .

[0075] In a direction perpendicular to the plane where the display panel 10 is located, the reflective sheet 25 does not overlap with the second light entrance and exit surface 42 , that is, the reflective sheet 25 is not arranged in the area corresponding to the second light entrance and exit surface 42 , so as to avoid the setting of the reflective sheet 25 affecting the light entering and exiting the second light entrance and exit surface 42 .

[0076] It should be noted that in the embodiment of the present application, in addition to the light guide plate 70 and the reflective sheet 90, the backlight module 20 may also include a plurality of optical film materials such as a diffuser and a brightness enhancement film. Figure 2 Only a part of the film layer structure of the backlight module 20 is shown, which does not represent the actual film layer and size.

[0077] Continue to refer Figure 1 and Figure 5 In some optional embodiments, the accommodating space 201 includes a first accommodating space 2011, the iron frame 21 protrudes in a direction away from the display panel 10 to form the first accommodating space 2011, and the light guide component 40 and the fingerprint recognition unit 30 are located in the first accommodating space 2011, thereby preventing the setting of the light guide component 40 and the fingerprint recognition unit 30 from affecting the flatness of the light guide plate 23.

[0078] In some alternative embodiments, please refer to Fig.13 , Fig.13 1 is a schematic plan view of a display device provided by the present invention. The display device 1000 provided by this embodiment includes the display module 100 provided by the above embodiment of the present invention. Fig.13 The embodiment only takes a mobile phone as an example to illustrate the display device 1000. It can be understood that the display device 1000 provided in the embodiment of the present invention can also be a computer, a television, a car display device or other display device 1000 with a display function, and the present invention does not specifically limit this. The display device 1000 provided in the embodiment of the present invention has the beneficial effects of the display module 100 provided in the embodiment of the present invention. For details, please refer to the specific description of the display module 100 in the above embodiments, and this embodiment will not be repeated here.

[0079] It can be seen from the above embodiments that the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0080] In the present invention, the fingerprint recognition unit is located in the accommodating space, that is, the fingerprint recognition unit is arranged in the accommodating space formed by the iron frame, so there is no need to set a hole on the iron frame, thereby enhancing the support of the iron frame to the film material in the accommodating space, effectively suppressing the generation of Newton rings, and being beneficial to improving the accuracy of fingerprint recognition. In addition, in the present invention, the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located in the non-display area, avoiding the setting of the fingerprint recognition unit from affecting the flatness of the portion of the film material in the accommodating space located in the display area, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the accuracy of fingerprint recognition. The display module also includes a light guide component, which is located in the accommodating space, and along the direction perpendicular to the plane where the display panel is located, the light guide component and the non-display area are at least partially overlapped, that is, the light guide component is at least partially located in the area corresponding to the non-display area in the accommodating space, effectively reducing the influence of the setting of the light guide component on the flatness of the portion of the film material in the accommodating space located in the display area, and can also effectively suppress the generation of Newton rings, which is beneficial to improving the accuracy of fingerprint recognition.

[0081] At the same time, the light guide component includes a first light entrance and exit surface and a second light entrance and exit surface. The first light entrance and exit surface faces the fingerprint recognition unit, and the second light entrance and exit surface is located at one end of the light guide component close to the display area, and along the direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface is located on the side of the light guide component facing the display panel. The light emitted by the fingerprint recognition light source in the fingerprint recognition unit enters the light guide component through the first light entrance and exit surface, and the light can be emitted from the second light entrance and exit surface through the conduction of the light guide component. Since the second light entrance and exit surface is located on the side of the light guide component facing the display panel along the direction perpendicular to the plane where the display panel is located, the light can be emitted from the light exit surface of the display panel. And since the second light entrance and exit surface is located at one end of the light guide component close to the display area, it is conducive to the light being emitted from the fingerprint recognition area in the display area. Similarly, the light reflected by the touch subject can enter the light guide component through the second light entrance and exit surface, and the light can be emitted from the first light entrance and exit surface through the conduction of the light guide component, so that the light sensing element in the fingerprint recognition unit can receive the light reflected by the touch subject to realize fingerprint recognition.

[0082] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display module, characterized in that: include: A display panel, the display panel comprising a display area and a non-display area surrounding the display area; A backlight module, the backlight module is located at a side of the display panel away from the light emitting surface thereof, the backlight module comprises an iron frame, and the iron frame forms an accommodating space; A fingerprint recognition unit, the fingerprint recognition unit is located in the accommodating space, and the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located in the non-display area, and the fingerprint recognition unit includes a fingerprint recognition light source and a light sensing element; a light guide component, the light guide component being located in the accommodating space, and at least partially overlapping the non-display area along a direction perpendicular to the plane where the display panel is located, the light guide component comprising a first light entrance and exit surface and a second light entrance and exit surface, the first light entrance and exit surface facing the fingerprint recognition unit, the second light entrance and exit surface being located at one end of the light guide component close to the display area, and along a direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface being located at a side of the light guide component facing the display panel; The light guide component comprises a first surface and a second surface which are arranged opposite to each other, and a first side wall connecting the first surface and the second surface, wherein along a direction perpendicular to the plane where the display panel is located, the first surface is located at a side of the light guide component close to the display panel, and along a direction from the non-display area to the display area, the first side wall is located at a side of the light guide component close to the display area; The angle between the first surface and the first side wall is less than 90°; The second light entrance and exit surface is located at one end of the first surface close to the display area, a first reflective layer is provided on the first side wall, and the second light entrance and exit surface and the first reflective layer at least partially overlap in a direction perpendicular to the plane where the display panel is located.

2. The display module according to claim 1, characterized in that: The angle between the first surface and the first sidewall is less than 45°; The vertical projection of the light guide component on the plane where the display panel is located is located in the non-display area.

3. The display module according to claim 1, characterized in that: The iron frame includes a bottom plate, the light guide component and the fingerprint recognition unit are both fixed to a side of the bottom plate close to the display panel, and the fingerprint recognition unit is located between the light guide component and the bottom plate; The light guide component further includes a second side wall connecting the first surface and the second surface, and pointing from the non-display area to the display area, the second side wall is located at a side of the light guide component away from the display area, and a second reflective layer is provided on the second side wall; The angle between the second surface and the second side wall is less than 90°; The first light entrance and exit surface is located on the second surface; The vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located within the vertical projection of the first light input and output surface on the plane where the display panel is located, and the vertical projection of the fingerprint recognition unit on the plane where the display panel is located is located within the vertical projection of the second reflective layer on the plane where the display panel is located.

4. The display module according to claim 3, characterized in that: Along a direction perpendicular to the plane where the display panel is located, the fingerprint recognition light source and the light sensing element do not overlap.

5. The display module according to claim 1, characterized in that: The backlight module also includes a plastic frame; The iron frame includes a bottom plate and a side plate, the plastic frame is located on a side of the side plate close to the accommodating space, the light guide component is fixed to a side of the bottom plate close to the display panel, and the fingerprint recognition unit is fixed to a side of the plastic frame close to the accommodating space; The light guide component further includes a second side wall connecting the first surface and the second surface, and pointing from the non-display area to the display area. The second side wall is located at a side of the light guide component away from the display area, and the second side wall is the first light entrance and exit surface. The vertical projection of the fingerprint recognition unit on the plane where the side panel is located is located within the vertical projection of the first light input and output surface on the plane where the side panel is located, and the vertical projection of the fingerprint recognition unit on the plane where the side panel is located is located within the vertical projection of the first reflective layer on the plane where the side panel is located.

6. The display module according to claim 5, characterized in that: Along a direction perpendicular to the plane where the side plate is located, the fingerprint recognition light source and the light sensing element do not overlap.

7. The display module according to claim 1, characterized in that: A first microstructure is disposed on at least a portion of the first surface, and along a direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface and the first microstructure do not overlap; A second microstructure is disposed on at least a portion of the second surface, and along a direction perpendicular to the plane where the display panel is located, the first light entrance and exit surface and the second microstructure do not overlap.

8. The display module according to claim 7, characterized in that: The material of the first microstructure is at least one of polymethyl methacrylate, polycarbonate, glass and resin; The material of the second microstructure is at least one of polymethyl methacrylate, polycarbonate, glass and resin.

9. The display module according to claim 1 or 7, characterized in that: A third reflective layer is disposed on at least a portion of the first surface, and along a direction perpendicular to the plane where the display panel is located, the second light entrance and exit surface and the third reflective layer do not overlap; A fourth reflective layer is disposed on at least a portion of the second surface, and along a direction perpendicular to the plane where the display panel is located, the first light incident and exit surfaces and the fourth reflective layer do not overlap.

10. The display module according to claim 1, characterized in that: The light guide component further includes a third side wall connected to the first surface and the second surface, and the third side wall is also connected to the first side wall; A light shielding layer or a fifth reflecting layer is disposed on the third side wall.

11. The display module according to claim 1, characterized in that: The backlight module comprises a light guide plate and a light source assembly located in the accommodation space, and the vertical projection of the light source assembly on the plane where the display panel is located is located in the non-display area; Along a direction perpendicular to the plane where the display panel is located, the light guide component and the fingerprint recognition unit are located between the light guide plate and the iron frame; Along a direction perpendicular to the plane where the display panel is located, the light guide component and / or the fingerprint recognition unit partially overlaps with the light source assembly.

12. The display module according to claim 11, characterized in that: The backlight module further comprises a reflective sheet located in the accommodating space, and the reflective sheet is located at a side of the light guide plate away from the display panel; Along a direction perpendicular to the plane where the display panel is located, the reflective sheet and the second light entrance and exit surface do not overlap.

13. The display module according to claim 1, characterized in that: The accommodating space includes a first accommodating space, and the iron frame protrudes in a direction away from the display panel to form the first accommodating space; The light guide component and the fingerprint recognition unit are located in the first accommodating space.

14. A display device, characterized in that: The display device comprises the display module according to any one of claims 1-13.

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