Display apparatus and electronic device

Abstract

A display apparatus and an electronic device. A sensor (30) is located in a first display area (1011); an infrared-transmissive reflective film (22) is provided in the first display area (1011) and a second display area (1012); the transmittance of the infrared-transmissive reflective film (22) for infrared light is greater than the transmittance of the infrared-transmissive reflective film (22) for visible light, and the reflectivity of the infrared-transmissive reflective film (22) for infrared light is less than the reflectivity of the infrared-transmissive reflective film (22) for visible light.

Description

Display device and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device and an electronic device. BACKGROUND

[0002] The under-screen camera technology refers to setting a front camera under a screen without damaging the integrity of the screen. The screen display area is divided into a regular display area and a camera area. For example, the under-screen infrared camera applied to a vehicle display can monitor the safety belt, fatigue and distraction of a driver, and ensure the imaging effect of the infrared camera, i.e., the camera area has sufficient infrared transmittance, and ensure the integrated display of the camera area and the regular display area.

[0003] However, in the liquid crystal display device, various optical films exist in the backlight module, which greatly affects the infrared transmittance of the camera area, and further affects the imaging effect of the infrared camera. SUMMARY

[0004] The embodiments of the present application provide a display device and an electronic device, which can improve the transmittance of the infrared light of the backlight module, and further improve the sensing effect of the sensor on the infrared light.

[0005] The embodiments of the present application provide a display device, which comprises a display area, the display area comprising a first display area and a second display area adjacent to the first display area.

[0006] The display device further comprises:

[0007] a display panel;

[0008] a backlight module disposed on one side of the display panel;

[0009] a sensor disposed on a side of the backlight module away from the display panel and located in the first display area;

[0010] The backlight module comprises a light guide plate disposed between the display panel and the sensor and an infrared penetration reflection film disposed between the light guide plate and the sensor, the infrared penetration reflection film is disposed in the first display area and the second display area, the transmittance of the infrared light of the infrared penetration reflection film is greater than the transmittance of the visible light of the infrared penetration reflection film, and the reflectivity of the infrared light of the infrared penetration reflection film is less than the reflectivity of the visible light of the infrared penetration reflection film.

[0011] The embodiment of the present application further provides an electronic device, which comprises a display device, and the display device comprises a display area, the display area comprising a first display area and a second display area adjacent to the first display area.

[0012] The display device further comprises:

[0013] a display panel;

[0014] a backlight module arranged on one side of the display panel;

[0015] a sensor arranged on a side of the backlight module away from the display panel and located in the first display area;

[0016] The backlight module comprises a light guide plate arranged between the display panel and the sensor and an infrared penetration reflection film arranged between the light guide plate and the sensor, the infrared penetration reflection film is arranged in the first display area and the second display area, the transmittance of the infrared penetration reflection film to infrared light is greater than the transmittance of the infrared penetration reflection film to visible light, and the reflectivity of the infrared penetration reflection film to the infrared light is less than the reflectivity of the infrared penetration reflection film to the visible light. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0019] Fig. 1 is a structural schematic diagram of a display device provided by an embodiment;

[0020] Fig. 2 is a structural schematic diagram of a display device provided by an embodiment of the present application;

[0021] Fig. 3 is another structural schematic diagram of a display device provided by an embodiment of the present application;

[0022] Fig. 4 is a spectral transmittance curve diagram of an infrared penetration reflection film provided by an embodiment of the present application;

[0023] Fig. 5 is a driving period diagram of a sensor and a light adjustment layer provided by an embodiment of the present application;

[0024] Fig. 6 is a structural schematic diagram of a light adjustment layer provided by an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of the display device in Comparative Example 1 provided in the embodiments of this application;

[0026] Figure 8 is a schematic diagram of the display device in Comparative Example 2 provided in the embodiments of this application;

[0027] Figure 9 is an imaging effect diagram of the sensor in the display device shown in Figure 3 provided in an embodiment of this application;

[0028] Figure 10 is an imaging effect diagram of the sensor of the display device in Comparative Example 1 provided in the embodiments of this application;

[0029] Figure 11 is an imaging effect diagram of the sensor of the display device in Comparative Example 2 provided in the embodiments of this application;

[0030] Figure 12 is a schematic diagram of an electronic device provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Display panel; 2. First backplate; 3. Reflective sheet; 4. First light guide plate; 5. Optical film; 6. First sensor; 7. Opening; 8. Auxiliary light source; 9. Auxiliary light guide plate;

[0033] 1a. First panel body; 2a. First lower polarizer; 3a. First upper polarizer; 4a. Second back plate; 5a. First infrared transmissive reflective film; 6a. Second light guide plate; 7a. Prism sheet; 8a. First cover plate; 9a. Second sensor;

[0034] 1b, Second panel body; 2b, Second lower polarizer; 3b, Second upper polarizer; 4b, Third back plate; 5b, Second infrared transmission and reflection film; 6b, Third light guide plate; 71b, Diffuser; 72b, Brightness enhancement film; 8b, Second cover plate; 9b, Third sensor;

[0035] 10. Display panel; 101. Display area; 1011. First display area; 1012. Second display area; 11. Panel body; 12. First polarizer; 13. Second polarizer; 111. Array substrate; 112. Opposing substrate;

[0036] 20. Backlight module; 21. Light guide plate; 22. Infrared transmissive reflective film; 23. Light adjustment layer; 24. Optical film; 25. Back plate; 250. Through hole; 26. Light source; 231. First substrate; 232. Second substrate; 233. Electrode layer; 234. Liquid crystal layer; 2331. First electrode layer; 2332. Second electrode layer;

[0037] 30. Sensors;

[0038] 40. Cover plate;

[0039] 50. Electronic equipment; 51. Display device. Embodiments of the present invention

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0041] Referring to Figure 1, the display device includes a display panel 1, a camera 6, and a backlight module. The backlight module is disposed on the back side of the display panel 1 and includes a first back plate 2, a reflective sheet 3 disposed between the first back plate 2 and the first display panel 1, a first light guide plate 4 disposed between the reflective sheet 3 and the display panel 1, and an optical film 5 disposed between the first light guide plate 4 and the display panel 1. An opening 7 is formed in the backlight module, passing through the first back plate 2, the reflective sheet 3, the first light guide plate 4, and the optical film 5. The first sensor 6 is disposed corresponding to the opening 7 to improve the transmittance of the backlight module and enhance the photosensitivity of the first sensor 6. Furthermore, the backlight module also includes an auxiliary light guide plate 9 disposed between the back plate 2 and the first sensor 6, and an auxiliary light source 8 located on one side of the auxiliary light guide plate 9. The auxiliary light guide plate 9 can cover the opening 7, thereby providing light to the area of ​​the opening 7 to improve the phenomenon that the display device displays abnormally in the area corresponding to the opening 7 due to the lack of backlight because the opening 7 is provided in the backlight module. However, since the area corresponding to the opening 7 does not have the diffuser 3 and other optical films 5, the light emitted from the area corresponding to the opening 7 is significantly different from the light emitted from other areas of the backlight module, which will still cause the display device to exhibit uneven display defects.

[0042] Referring to Figure 2, this application embodiment provides a display device, which includes a display area 101, the display area 101 including a first display area 1011 and a second display area 1012 adjacent to the first display area 1011.

[0043] The display device further includes a display panel 10, a backlight module 20, and a sensor 30; the backlight module 20 is disposed on one side of the display panel 10; the sensor 30 is disposed on the side of the backlight module 20 away from the display panel 10 and is located within the first display area 1011.

[0044] The backlight module 20 includes a light guide plate 21 disposed between the display panel 10 and the sensor 30, and an infrared transmissive and reflective film 22 disposed between the light guide plate 21 and the sensor 30. The infrared transmissive and reflective film 22 is disposed in the first display area 1011 and the second display area 1012. The transmittance of the infrared transmissive and reflective film 22 to infrared light is greater than the transmittance of the infrared transmissive and reflective film 22 to visible light, and the reflectance of the infrared transmissive and reflective film 22 to infrared light is less than the reflectance of the infrared transmissive and reflective film 22 to visible light.

[0045] In the implementation process, this embodiment of the application provides an infrared transmissive reflective film 22 between the light guide plate 21 and the sensor 30. The infrared transmissive reflective film 22 has a higher transmittance for infrared light than for visible light, and a lower reflectance for infrared light than for visible light. This effectively improves the transmittance of the backlight module 20 for infrared light. Furthermore, the infrared transmissive reflective film 22 ensures the light emission efficiency of the backlight module 20 while reflecting visible light, and also shields the sensor 30, thus improving the display effect of the display device. Compared to existing display devices, this avoids the phenomenon where infrared light is reflected by the reflective film, preventing the sensor 30 from sensing infrared light. This improves the sensing effect of the sensor 30 for infrared light in the display device and enhances the infrared sensing function of the display device.

[0046] In one embodiment of this application, the light guide plate is disposed in the first display area and the second display area, and the orthographic projection of the sensor on the light guide plate is located within the coverage area of ​​the light guide plate.

[0047] In one embodiment of this application, the backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, the light adjustment layer being disposed in the first display area and the second display area;

[0048] The light adjustment layer switches between a transparent state and a fog state. When the light adjustment layer is configured in the transparent state, light incident on the light adjustment layer from the light guide plate passes through the light adjustment layer. When the light adjustment layer is configured in the fog state, light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.

[0049] In one embodiment of this application, when the sensor senses the infrared light, the light adjustment layer is configured in the transparent state, and when the sensor stops sensing the infrared light, the light adjustment layer is configured in the fog state.

[0050] In one embodiment of this application, the display device senses the infrared light during a first driving period, and the display device stops sensing the infrared light during a second driving period, and the first driving period is less than 10ms.

[0051] In one embodiment of this application, when the display device performs driving display, the first driving period and the second driving period alternate.

[0052] In one embodiment of this application, the light adjustment layer includes a first substrate and a second substrate disposed opposite to each other, an electrode layer disposed on the first substrate and / or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate, wherein the liquid crystal layer includes polymer network liquid crystal or polymer dispersed liquid crystal.

[0053] In one embodiment of this application, the backlight module further includes an optical film disposed between the light adjustment layer and the display panel, the optical film being disposed in the first display area and the second display area.

[0054] In one embodiment of this application, the backlight module further includes a back plate disposed on the side of the infrared transmissive reflective film away from the light guide plate, wherein the back plate has a through hole located in the first display area, and the orthographic projection of the through hole on the infrared transmissive reflective film is located within the coverage area of ​​the orthographic projection of the optical film on the infrared transmissive reflective film.

[0055] In one embodiment of this application, the orthographic projection of the sensor on the back plate is located within the through hole, and the distance between the orthographic projection of the sensor on the back plate and the edge of the through hole is greater than or equal to 0.3 mm.

[0056] In one embodiment of this application, the infrared transmissive reflective film has a transmittance of infrared light greater than or equal to 84%, and the infrared transmissive reflective film has a reflectance of visible light greater than or equal to 99%.

[0057] It should be noted that the display device provided in this application embodiment is equipped with the sensor 30, and the sensor 30 is an infrared light sensor to realize the sensing and imaging of infrared light.

[0058] In some embodiments, when the display device is used for in-vehicle display, such as when the display device is used for dashboard display, the infrared detection function of the sensor 30 can realize seat belt monitoring, fatigue monitoring, and distraction monitoring for the driver.

[0059] Referring to Figures 2 and 3, the display device further includes a cover plate 40, which is disposed on the light-emitting side of the display panel 10, and the backlight module 20 is disposed on the side of the display panel 10 away from the cover plate 40.

[0060] In some embodiments, the cover plate 40 may be a glass cover plate.

[0061] In some embodiments, the display panel 10 includes a panel body 11, a first polarizer 12 and a second polarizer 13 disposed on opposite sides of the panel body 11. The panel body 11 includes an array substrate 111 and an opposing substrate 112 disposed opposite to each other. The array substrate 111 is located between the opposing substrate 112 and the backlight module 20. The first polarizer 12 is located on the side of the array substrate 111 away from the opposing substrate 112, and the second polarizer 13 is located on the side of the opposing substrate 112 away from the array substrate 111. The cover plate 40 is disposed on the side of the second polarizer 13 away from the opposing substrate 112.

[0062] In some embodiments, the backlight module 20 includes a light guide plate 21, an infrared transmissive reflective film 22 disposed on the side of the light guide plate 21 away from the display panel 10, a back plate 25 disposed on the side of the infrared transmissive reflective film 22 away from the light guide plate 21, an optical film 24 disposed between the light guide plate 21 and the display panel 10, and a light source 26 disposed on the side of the light guide plate 21.

[0063] In some embodiments, the backlight module 20 is a side-lit backlight module, the light guide plate 21 includes a first surface near the optical film 24, a second surface near the infrared transmissive reflective film 22, and a plurality of side surfaces connected between the first surface and the second surface, and the light source 26 is disposed at at least one of the side surfaces, and the light emitting surface of the light source 26 is disposed facing at least one of the side surfaces, so that the light source 26 emits light toward the light guide plate 21.

[0064] In this embodiment, the sensor 30 is disposed on the side of the infrared transmissive reflective film 22 away from the light guide plate 21, and the infrared transmissive reflective film 22 is disposed on the first display area 1011 and the second display area 1012, that is, the infrared transmissive reflective film 22 continuously covers the first display area 1011 and the second display area 1012; the sensor 30 is located within the first display area 1011, that is, the infrared transmissive reflective film 22 covers the sensor 30, and the infrared transmissive reflective film 22 reflects visible light and transmits infrared light; thereby, the transmittance of the backlight module 20 for infrared light can be effectively improved. Compared with the existing display device, the phenomenon that infrared light is reflected by the reflective film and the sensor cannot detect infrared light can be avoided, thus improving the sensing effect of the sensor 30 for infrared light in the display device and improving the infrared sensing function of the display device.

[0065] In some embodiments, the light guide plate 21 is disposed in the first display area 1011 and the second display area 1012, and the orthographic projection of the sensor 30 on the light guide plate 21 is located within the coverage area of ​​the light guide plate 21; that is, the light guide plate 21 provided in this embodiment does not have openings in the first display area 1011, so as to further improve the display uniformity of the first display area 1011 and the second display area 1012.

[0066] In some embodiments, the infrared transmission and reflection film 22 provided in this application can be a near infrared transmission system-reflector film (NSR), etc.

[0067] In some embodiments, the material of the infrared transmissive reflective film 22 may include polyethylene terephthalate (PET) or polycarbonate (PC).

[0068] In some embodiments, the infrared transmissive reflective film 22 has a transmittance of infrared light greater than or equal to 84%, and a reflectance of visible light greater than or equal to 99%; for example, the transmittance of infrared light by the infrared transmissive reflective film 22 can be 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%, and the reflectance of visible light by the infrared transmissive reflective film 22 can be 99%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, or 99%. 7%, 99.8%, 99.9%, or 100%, etc.; that is, the infrared transmissive reflective film 22 provided in this application embodiment has a high transmittance of infrared light, and at the same time, the infrared transmissive reflective film 22 has a high reflectance of visible light. Therefore, in this application embodiment, by setting the infrared transmissive reflective film 22 in the backlight module 20, the infrared light transmittance of the backlight module 20 is improved, thereby improving the infrared light sensing effect of the sensor 30. At the same time, the infrared transmissive reflective film 22 has a very high reflectance of visible light propagating from one side of the light guide plate 21, and can act as a reflective sheet to improve light utilization and increase the brightness of the backlight module 20.

[0069] In some embodiments, the spectral transmittance of the infrared transmissive reflective film 22 is verified to obtain the curve shown in Figure 4. The curve shown in Figure 4 is the measured data of the transmittance of the infrared transmissive reflective film 22 for light with wavelengths of 380nm-1000nm. As can be seen from Figure 4, the transmittance of the infrared transmissive reflective film 22 for the visible light band (400nm-760nm) is close to 0, thus having high reflectivity. The transmittance of the infrared transmissive reflective film 22 for the infrared light band (>760nm) is above 84%, thus having high transmittance.

[0070] It is understandable that the infrared penetrating reflective film 22 can reflect visible light from one side of the light guide plate 21, thereby effectively shielding the sensor 30 and improving the display uniformity and integration effect of the display device.

[0071] In some embodiments, the back plate 25 has a through hole 250 located in the first display area 1011, and the orthographic projection of the through hole 250 on the infrared transmissive reflective film 22 is located within the coverage area of ​​the orthographic projection of the optical film 24 on the infrared transmissive reflective film 22. In this embodiment, by opening the through hole 250 in the back plate 25 corresponding to the first display area 1011, and setting the sensor 30 corresponding to the through hole 250, the back plate 25 is avoided from interfering with the light sensing of the sensor 30, thereby further improving the light sensing effect of the sensor 30.

[0072] In some embodiments, the orthographic projection of the sensor 30 on the back plate 25 is located within the through hole 250, and the distance between the orthographic projection of the sensor 30 on the back plate 25 and the edge of the through hole 250 is greater than or equal to 0.3 mm; that is, the aperture of the through hole 250 is larger than the size of the sensor 30, and the through hole 250 can be expanded outward. Since the infrared penetrating reflective film 22 can reflect visible light to shield the sensor 30 and the through hole 250, the aperture of the through hole 250 can be increased, which can reduce the influence of the edge of the through hole 250 on the amount of light entering the sensor 30, and effectively improve the field of view of the sensor 30 at the through hole 250.

[0073] In some embodiments, the optical film 24 is disposed on the first display area 1011 and the second display area 1012; that is, the optical film 24 continuously covers the first display area 1011 and the second display area 1012, thereby the optical film 24 can also adjust and improve the light in the first display area 1011, so that the light emitted from the first display area 1011 and the light emitted from the second display area 1012 tend to be uniform, thereby improving the light emission uniformity of the backlight module 20 and improving the display uniformity of the display device.

[0074] In some embodiments, the optical film 24 may include a direct lamination reflective polarizer or a direct lamination reflective polarizer (DLRP).

[0075] In some embodiments, the backlight module 20 further includes a light adjustment layer 23 disposed between the light guide plate 21 and the display panel 10. The light adjustment layer 23 is disposed in the first display area 1011 and the second display area 1012. The light adjustment layer 23 switches between a transparent state and a fog state. When the light adjustment layer 23 is configured in the transparent state, light incident from the light guide plate 21 onto the light adjustment layer 23 passes through the light adjustment layer 23. When the light adjustment layer 23 is configured in the fog state, light incident from the light guide plate 21 onto the light adjustment layer 23 is scattered in the light adjustment layer 23. Furthermore, when the light adjustment layer 23 is switched to the transparent state, the sensor 30 can sense infrared light, and when the light adjustment layer 23 is switched to the fog state, the light adjustment layer 23 can scatter light to act as a diffuser, thereby improving the light emission uniformity of the backlight module 20.

[0076] In some embodiments, when the sensor 30 senses the infrared light, the light adjustment layer 23 is configured in the transparent state, and when the sensor 30 stops sensing the infrared light, the light adjustment layer 23 is configured in the fog state; thus, the light adjustment layer 23 will not affect the photosensitivity of the sensor 30.

[0077] In some embodiments, referring to Figures 3 and 5, the display device senses the infrared light during the first driving period T1, and the display device stops sensing the infrared light during the second driving period T2. The first driving period T1 is less than 10ms, and since the first driving period T1 is less than 10ms, the screen switching cannot be detected by the naked eye, thus achieving full-screen display.

[0078] In some embodiments, when the display device drives the display, the first driving period T1 and the second driving period T2 alternate; and the second driving period T2 is less than 10ms. Therefore, during the first driving period T1, the light adjustment layer 23 is configured in the transparent state, and the sensor 30 senses the infrared light, thereby effectively improving the infrared light sensing effect and imaging effect of the sensor 30. During the second driving period T2, the light adjustment layer 23 is configured in the fog state, and the sensor 30 stops sensing the infrared light. Therefore, the light adjustment layer 23 can act as a diffuser to diffuse the light emitted by the backlight module 20, thereby improving the uniformity of the light emitted by the backlight module 20 and the display uniformity of the display device. Since both the first driving period T1 and the second driving period T2 are less than 10ms, the screen switching cannot be detected by the naked eye, thus achieving full-screen display and effectively improving the infrared light sensing effect and imaging effect of the sensor 30.

[0079] In some embodiments, referring to Figures 3 and 6, the light adjustment layer 23 includes a first substrate 231 and a second substrate 232 disposed opposite to each other, an electrode layer 233 disposed on the first substrate 231 and / or the second substrate 232, and a liquid crystal layer 234 located between the first substrate 231 and the second substrate 232; the liquid crystal layer 234 may include polymer dispersed liquid crystal (PDLC) or polymer network steady-state liquid crystal (PNLC).

[0080] In some embodiments, the electrode layer 233 includes a first electrode layer 2331 disposed on the side of the first substrate 231 near the liquid crystal layer 234 and a second electrode layer 2332 disposed on the side of the second substrate 232 near the liquid crystal layer 234.

[0081] It should be noted that the liquid crystal layer 234 includes either a polymer network liquid crystal or a polymer dispersed liquid crystal. The polymer dispersed liquid crystal primarily involves the polymerization reaction of low-molecular-weight liquid crystals and prepolymers under certain conditions, forming liquid crystal droplets dispersed within a polymer network. In contrast, the liquid crystal in the polymer network stable liquid crystal is distributed within a three-dimensional polymer network, forming a continuous channel network. Taking the polymer dispersed liquid crystal as an example, without an applied electric field, the optical axis orientation of the liquid crystal droplets is disordered, and its effective refractive index n0 does not match the refractive index np of the polymer. In this case, when light shines on the polymer dispersed liquid crystal, scattering occurs, resulting in an overall fogged state. When the polymer dispersed liquid crystal is placed in an electric field, the optical axis of the liquid crystal droplets aligns with the direction of the electric field. At this point, its effective refractive index n0 matches the refractive index np of the polymer, and there is no obvious interface between them. In this case, when light shines on the polymer dispersed liquid crystal, scattering does not occur, resulting in an overall transparent state. For inverse polymer-dispersed liquid crystals, their operating state is the opposite of that of polymer-dispersed liquid crystals. That is, without an electric field, inverse polymer-dispersed liquid crystals are transparent; with an external electric field applied, they are fogged. Therefore, by controlling whether an electric field is applied, the polymer-dispersed liquid crystal can be controlled to be either fogged or transparent, thus enabling the light adjustment layer 23 to have switchable fogged and transparent states. When the sensor 30 stops sensing infrared light, the light adjustment layer 23 is in a fogged state, thereby scattering the light emitted from one side of the light guide plate 21, thus uniformly providing backlight to the display panel 10, improving the display uniformity of the display device, and achieving a full-screen design to meet users' demands for a high screen-to-body ratio. When the sensor 30 senses infrared light, the light adjustment layer 23 is in a transparent state, which helps ensure the normal operation of the sensor 30 and meets users' light-sensing requirements for the display device.

[0082] It is understood that in the backlight module 20 provided in this application embodiment, the infrared transmissive reflective film 22, the light guide plate 21, the light adjustment layer 23, and the optical film 24 are all disposed in the first display area 1011 and the second display area 1012. That is, the infrared transmissive reflective film 22, the light guide plate 21, the light adjustment layer 23, and the optical film 24 are all integrally disposed, and only an opening needs to be made in the back plate 25 at the position corresponding to the first display area 1011. Therefore, in this application embodiment, the first display area 1011 and the sensor 30 can be disposed at any position in the display area 101. Compared with the existing display device shown in FIG1, the opening 7 formed in the backlight module will not affect the display area 1012. The position of the first sensor 6 is defined. On the other hand, since the optical film layers in the backlight module 20 provided in this application embodiment are not perforated, the display device provided in this application embodiment can flexibly set the positions of the first display area 1011 and the sensor 30 according to actual needs. Then, according to the positions of the first display area 1011 and the sensor 30, a back plate 25 with through holes 250 corresponding to the first display area 1011 and the sensor 30 can be added. That is, in the display device provided in this application embodiment, by using a back plate 25 with through holes 250 located in different positions, the sensor 30 can be located in different positions, which improves the applicability of the display device and reduces the cost of the display device.

[0083] In some embodiments, the first display area 1011 may be located at any position within the display area 101, and the second display area 1012 may be arranged around the first display area 1011, or the second display area 1012 may be arranged to partially surround the first display area 1011, or the first display area 1011 may be located on one side of the display area 101, while the second display area 1012 may be located on the opposite side of the display area 101.

[0084] Furthermore, since the arrangement of the first display area 1011 and the sensor 30 in this embodiment does not affect the display uniformity of the display device, the area of ​​the first display area 1011 and the area of ​​the sensor 30 can be increased as needed to improve the light-sensing function and light-sensing effect of the display device.

[0085] Furthermore, this application embodiment verifies the imaging effect of the sensor 30 of the display device shown in FIG3, and provides embodiments as well as comparative examples 1 and 2.

[0086] In this embodiment, a display device as shown in FIG3 is provided, and the imaging effect of the sensor 30 in the display device shown in FIG3 is verified, and the result shown in FIG9 is obtained.

[0087] Comparative Example 1 includes a display device as shown in Figure 7. The display device comprises a first panel body 1a, a first upper polarizer 3a disposed on the light-emitting side of the first panel body 1a, a first cover plate 8a disposed on the side of the second polarizer 3a away from the panel body 1a, a first lower polarizer 2a disposed on the side of the first panel body 1a away from the second polarizer 3a, a prism sheet 7a disposed on the side of the first lower polarizer 2a away from the first panel body 1a, a second light guide plate 6a disposed on the side of the prism sheet 7a away from the first lower polarizer 2a, a first infrared transmissive reflective film 5a disposed on the side of the second light guide plate 6a away from the prism sheet 7a, a second back plate 4a disposed on the side of the first infrared transmissive reflective film 5a away from the second light guide plate 6a, and a second sensor 9a. The second back plate 4a has a through hole corresponding to the second sensor 9a. The imaging effect of the second sensor 9a in the display device shown in Figure 7 is verified, and the result is shown in Figure 10.

[0088] Comparative Example 2 includes a display device as shown in Figure 8, wherein the display device includes a second panel body 1b, a second upper polarizer 3b disposed on the light-emitting side of the second panel body 1b, a second cover plate 8b disposed on the side of the second upper polarizer 3b away from the second panel body 1b, a first lower polarizer 2b disposed on the side of the second panel body 1b away from the second upper polarizer 3b, a brightness enhancement film 72b disposed on the side of the first lower polarizer 2b away from the second panel body 1b, and a cover plate 8b disposed on the side of the brightness enhancement film 72b away from the first lower polarizer 2b. The device includes a diffuser 71b, a third light guide plate 6b disposed on the side of the diffuser 71b away from the brightness enhancement film 72b, a second infrared transmissive reflective film 5b disposed on the side of the third light guide plate 6b away from the diffuser 71b, a third back plate 4b disposed on the side of the second infrared transmissive reflective film 5b away from the third light guide plate 6b, and a third sensor 9b. The third back plate 4b has a through hole corresponding to the third sensor 9b. The imaging effect of the third sensor 9b in the display device shown in FIG8 is verified, and the result is shown in FIG11.

[0089] As can be seen from Figures 9, 10, and 11, the display device shown in Figure 3 provided in this embodiment can obtain clear images and effectively realize functions such as recognition and detection. However, the blurring and distortion in Comparative Examples 1 and 2 will make it difficult for the display device to recognize objects; for example, the prism sheet 7a in the structure shown in Figure 10 and the diffuser sheet 71b in the structure shown in Figure 11 will severely affect the transmittance of infrared light, thereby affecting the imaging effect and sensing function of the sensors 9a and 9b.

[0090] In summary, this embodiment of the application, by setting the infrared transmissive reflective film 22 between the light guide plate 21 and the sensor 30, and by ensuring that the infrared transmissive reflective film 22 has a higher transmittance for infrared light than for visible light and a lower reflectance for infrared light than for visible light, can effectively improve the transmittance of the backlight module 20 for infrared light. Furthermore, the infrared transmissive reflective film 22, while reflecting visible light, ensures the light emission efficiency of the backlight module 20 and shields the sensor 30, thereby improving the display effect of the display device. Compared to existing display devices, this embodiment avoids the phenomenon where infrared light is reflected by the reflective film, preventing the sensor 30 from sensing infrared light, thus improving the infrared sensing effect of the sensor 30 in the display device and enhancing the infrared sensing function of the display device.

[0091] Additionally, referring to Figures 2 and 12, this application embodiment also provides an electronic device 50, which includes a display device 51 as described in the above embodiments.

[0092] It should be noted that the electronic device 50 provided in this application embodiment is equipped with the sensor 30, and the sensor 30 is an infrared light sensor to realize the sensing and imaging of infrared light.

[0093] In some embodiments, when the electronic device 50 is an in-vehicle display device, such as an instrument panel display device, the infrared detection function of the sensor 30 can perform seat belt monitoring, fatigue monitoring, and distraction monitoring for the driver.

[0094] It is understood that the electronic device 50 includes the display device 51 described in the above embodiments. Therefore, the electronic device 50 has the same beneficial effects as the display device 51 described in the above embodiments, which will not be repeated here.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0098] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display device, the display device comprising a display area, the display area including a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light.

2. The display device according to claim 1, wherein, The light guide plate is disposed in the first display area and the second display area, and the orthographic projection of the sensor on the light guide plate is located within the coverage area of ​​the light guide plate.

3. The display device according to claim 1, wherein, The backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, the light adjustment layer being disposed in the first display area and the second display area; The light adjustment layer switches between a transparent state and a fog state. When the light adjustment layer is configured in the transparent state, light incident on the light adjustment layer from the light guide plate passes through the light adjustment layer. When the light adjustment layer is configured in the fog state, light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.

4. The display device according to claim 3, wherein, When the sensor senses the infrared light, the light adjustment layer is configured in the transparent state; when the sensor stops sensing the infrared light, the light adjustment layer is configured in the fog state.

5. The display device according to claim 4, wherein, During the first driving period, the sensor of the display device senses the infrared light; during the second driving period, the sensor of the display device stops sensing the infrared light; and the first driving period is less than 10ms.

6. The display device according to claim 5, wherein, When the display device performs driving display, the first driving period and the second driving period alternate.

7. The display device according to any one of claims 3 to 6, wherein, The light adjustment layer includes a first substrate and a second substrate disposed opposite to each other, an electrode layer disposed on the first substrate and / or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate. The liquid crystal layer includes polymer network liquid crystal or polymer dispersed liquid crystal.

8. The display device according to any one of claims 3 to 6, wherein, The backlight module further includes an optical film disposed between the light adjustment layer and the display panel, the optical film being disposed in the first display area and the second display area.

9. The display device according to claim 8, wherein, The backlight module also includes a back plate disposed on the side of the infrared transmissive reflective film away from the light guide plate. The back plate has a through hole located in the first display area. The orthographic projection of the through hole on the infrared transmissive reflective film is located within the coverage area of ​​the orthographic projection of the optical film on the infrared transmissive reflective film.

10. The display device according to claim 9, wherein, The orthographic projection of the sensor on the back plate is located within the through hole, and the distance between the orthographic projection of the sensor on the back plate and the edge of the through hole is greater than or equal to 0.3 mm.

11. The display device according to claim 1, wherein, The infrared transmissive reflective film has a transmittance of infrared light greater than or equal to 84%, and a reflectance of visible light greater than or equal to 99%.

12. An electronic device, the electronic device comprising a display device, the display device comprising a display area, the display area comprising a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light.

13. The electronic device according to claim 12, wherein, The light guide plate is disposed in the first display area and the second display area, and the orthographic projection of the sensor on the light guide plate is located within the coverage area of ​​the light guide plate.

14. The electronic device according to claim 12, wherein, The backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, the light adjustment layer being disposed in the first display area and the second display area; The light adjustment layer switches between a transparent state and a fog state. When the light adjustment layer is configured in the transparent state, light incident on the light adjustment layer from the light guide plate passes through the light adjustment layer. When the light adjustment layer is configured in the fog state, light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.

15. The electronic device according to claim 14, wherein, When the sensor senses the infrared light, the light adjustment layer is configured in the transparent state; when the sensor stops sensing the infrared light, the light adjustment layer is configured in the fog state.

16. The electronic device according to claim 15, wherein, During the first driving period, the sensor of the display device senses the infrared light; during the second driving period, the sensor of the display device stops sensing the infrared light; and the first driving period is less than 10ms.

17. The electronic device according to claim 16, wherein, When the display device performs driving display, the first driving period and the second driving period alternate.

18. The electronic device according to any one of claims 14 to 17, wherein, The light adjustment layer includes a first substrate and a second substrate disposed opposite to each other, an electrode layer disposed on the first substrate and / or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate. The liquid crystal layer includes polymer network liquid crystal or polymer dispersed liquid crystal.

19. The electronic device according to any one of claims 14 to 17, wherein, The backlight module further includes an optical film disposed between the light adjustment layer and the display panel, the optical film being disposed in the first display area and the second display area.

20. The electronic device according to claim 19, wherein, The backlight module also includes a back plate disposed on the side of the infrared transmissive reflective film away from the light guide plate. The back plate has a through hole located in the first display area. The orthographic projection of the through hole on the infrared transmissive reflective film is located within the coverage area of ​​the orthographic projection of the optical film on the infrared transmissive reflective film.

Images