Display device

Abstract

The invention discloses a display device. The display device comprises a display area, and the display area comprises a first display area and a second display area adjacent to the first display area. The display device further comprises a display panel, a backlight module and a sensor. The backlight module is arranged on one side of the display panel; the sensor is arranged on the side, away from the display panel, of the backlight module and located in the first display area. The backlight module comprises a light guide plate arranged between the display panel and the sensor and infrared penetrating and reflecting films arranged between the light guide plate and the sensor, the infrared penetrating and reflecting films are arranged in the first display area and the second display area, and the transmittance of the infrared penetrating and reflecting films to infrared light is larger than that of the infrared penetrating and reflecting films to visible light. The reflectivity of the infrared penetrating and reflecting film to infrared light is smaller than that of the infrared penetrating and reflecting film to visible light; according to the display device, the infrared light sensing effect of the sensor in the display device can be improved, and the infrared sensing function of the display device is improved.

Description

Technical Field

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

[0002] Under-screen camera technology means that the front camera is placed under the screen without destroying the integrity of the screen, and the screen display area is divided into two parts: the regular display area and the camera area. For example, an under-screen infrared camera is used in car displays to monitor the driver's seat belt, fatigue, and distraction. It is necessary to ensure the imaging effect of the infrared camera, that is, the camera area has sufficient infrared transmittance, and to ensure that the camera area and the regular display area are integrated.

[0003] However, in a liquid crystal display device, since there are various optical films in the backlight module, the infrared transmittance of the camera area will be greatly affected, thereby affecting the imaging effect of the infrared camera. Summary of the invention

[0004] The embodiment of the present application provides a display device, which can improve the transmittance of a backlight module to infrared light, thereby improving the sensing effect of a sensor to infrared light.

[0005] An embodiment of the present application provides 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;

[0006] The display device further includes:

[0007] Display panel;

[0008] A backlight module, arranged on one side of the display panel;

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

[0010] Among them, the backlight module includes a light guide plate arranged between the display panel and the sensor and an infrared penetrating reflective film arranged between the light guide plate and the sensor, the infrared penetrating reflective film is arranged in the first display area and the second display area, the transmittance of the infrared penetrating reflective film to infrared light is greater than the transmittance of the infrared penetrating reflective film to visible light, and the reflectivity of the infrared penetrating reflective film to the infrared light is less than the reflectivity of the infrared penetrating reflective film to the visible light.

[0011] In an embodiment of the present 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 range of the light guide plate.

[0012] In one embodiment of the present application, the backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, and the light adjustment layer is disposed in the first display area and the second display area;

[0013] The light adjustment layer switches between a transparent state and a foggy state. When the light adjustment layer is configured in the transparent state, the 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 foggy state, the light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.

[0014] In an embodiment of the present application, when the sensor senses the infrared light, the light adjustment layer is configured to be in the transparent state, and when the sensor stops sensing the infrared light, the light adjustment layer is configured to be in the foggy state.

[0015] In one embodiment of the present application, the sensor senses the infrared light during a first driving period of the display device, and the sensor stops sensing the infrared light during a second driving period of the display device, and the first driving period is less than 10 ms.

[0016] In an embodiment of the present application, when the display device is driven for display, the first driving period and the second driving period are performed alternately.

[0017] In one embodiment of the present application, the light adjustment layer includes a first substrate and a second substrate arranged opposite to each other, an electrode layer arranged on the first substrate and / or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate, and the liquid crystal layer includes a polymer network liquid crystal or a polymer dispersed liquid crystal.

[0018] In one embodiment of the present application, the backlight module further includes an optical film disposed between the light adjustment layer and the display panel, and the optical film is disposed in the first display area and the second display area.

[0019] In one embodiment of the present application, the backlight module also includes a back panel arranged on the side of the infrared penetrating reflective film away from the light guide plate, and a through hole located in the first display area is opened in the back panel, and the orthographic projection of the through hole on the infrared penetrating reflective film is located within the coverage range of the orthographic projection of the optical film on the infrared penetrating reflective film.

[0020] In one embodiment of the present application, the orthographic projection of the sensor on the back plate is located in 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.

[0021] In one embodiment of the present application, the transmittance of the infrared penetrating reflective film to the infrared light is greater than or equal to 84%, and the reflectivity of the infrared penetrating reflective film to the visible light is greater than or equal to 99%.

[0022] The present application provides a display device, which can effectively improve the transmittance of a backlight module to infrared light by arranging an infrared penetrating reflective film between a light guide plate and a sensor, wherein the transmittance of the infrared penetrating reflective film to infrared light is greater than the transmittance of the infrared penetrating reflective film to visible light, and the reflectance of the infrared penetrating reflective film to infrared light is less than the reflectance of the infrared penetrating reflective film to visible light, and the transmittance of the backlight module to infrared light can be effectively improved, and the infrared penetrating reflective film can ensure the light output efficiency of the backlight module in the process of reflecting visible light, and shield the sensor, thereby improving the display effect of the display device; compared with the existing display device, it can avoid the phenomenon that the infrared light is reflected by the reflective sheet and the sensor cannot sense the infrared light, thereby improving the sensing effect of the sensor in the display device to infrared light, and improving the infrared sensing function of the display device.

[0023] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0025] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0026] Figure 1 A schematic diagram of the structure of a display device provided by an embodiment;

[0027] Figure 2 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0028] Figure 3 Another schematic diagram of the structure of the display device provided in the embodiment of the present application;

[0029] Figure 4 A spectral transmittance curve diagram of the infrared penetrating reflective film provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of a driving period of a sensor and a light adjustment layer provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of a light adjustment layer provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of the display device in Comparative Example 1 provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of the display device in Comparative Example 2 provided in an embodiment of the present application;

[0034] Fig. 9 Provided for the embodiments of this application Figure 3 The imaging effect diagram of the sensor in the display device shown;

[0035] Fig.10 This is an imaging effect diagram of the sensor of the display device in Comparative Example 1 provided in an embodiment of the present application;

[0036] Fig.11 This is an imaging effect diagram of the sensor of the display device in Comparative Example 2 provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. Display panel; 2. First back plate; 3. Reflector; 4. First light guide plate; 5. Optical film; 6. First sensor; 7. Opening; 8. Auxiliary light source; 9. Auxiliary light guide plate;

[0040] 1a, first panel body; 2a, first lower polarizer; 3a, first upper polarizer; 4a, second back plate; 5a, first infrared penetrating reflective film; 6a, second light guide plate; 7a, prism sheet; 8a, first cover plate; 9a, second sensor;

[0041] 1b, second panel body; 2b, second lower polarizer; 3b, second upper polarizer; 4b, third back plate; 5b, second infrared penetrating reflective film; 6b, third light guide plate; 71b, diffuser; 72b, brightness enhancement film; 8b, second cover plate; 9b, third sensor;

[0042] 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. Counter substrate;

[0043] 20. backlight module; 21. light guide plate; 22. infrared penetrating 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;

[0044] 30. Sensor;

[0045] 40. Cover plate;

[0046] 50. Electronic equipment; 51. Display device. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] Please refer to Figure 1 The display device comprises a display panel 1, a camera 6 and a backlight module, wherein the backlight module is arranged on the back side of the display panel 1, and the backlight module comprises a first back plate 2, a reflective sheet 3 arranged between the first back plate 2 and the first display panel 1, a first light guide plate 4 arranged between the reflective sheet 3 and the display panel 1, and an optical film 5 arranged between the first light guide plate 4 and the display panel 1; an opening 7 passing through the first back plate 2, the reflective sheet 3, the first light guide plate 4 and the optical film 5 is opened in the backlight module, and the first sensor 6 is arranged corresponding to the opening 7 to improve the transmittance of the backlight module and improve the photosensitivity effect of the first sensor 6; In addition, the backlight module also includes an auxiliary light guide plate 9 arranged between the back panel 2 and the first sensor 6 and an auxiliary light source 8 located on one side of the auxiliary light guide plate 9, and the auxiliary light guide plate 9 can cover the opening 7, and thus can provide light for the area of ​​the opening 7, so as to improve the phenomenon that the display device displays abnormally in the area corresponding to the opening 7 due to the lack of backlight due to the setting of the opening 7 in the backlight module; however, since the area corresponding to the opening 7 does not have the diffuser 3 and the other optical films 5, the light output from the area corresponding to the opening 7 is quite different from that from other areas of the backlight module, which will still cause the display device to have undesirable phenomena such as uneven display.

[0049] Please refer to Figure 2An embodiment of the present application provides a display device, which includes a display area 101 , and the display area 101 includes a first display area 1011 and a second display area 1012 adjacent to the first display area 1011 .

[0050] 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 a side of the backlight module 20 away from the display panel 10 and is located in the first display area 1011 .

[0051] In which, the backlight module 20 includes a light guide plate 21 arranged between the display panel 10 and the sensor 30 and an infrared penetrating reflective film 22 arranged between the light guide plate 21 and the sensor 30, the infrared penetrating reflective film 22 is arranged in the first display area 1011 and the second display area 1012, the transmittance of the infrared penetrating reflective film 22 to infrared light is greater than the transmittance of the infrared penetrating reflective film 22 to visible light, and the reflectivity of the infrared penetrating reflective film 22 to the infrared light is less than the reflectivity of the infrared penetrating reflective film 22 to the visible light.

[0052] During the implementation and application process, the embodiment of the present application sets the infrared penetrating reflective film 22 between the light guide plate 21 and the sensor 30, and the transmittance of the infrared penetrating reflective film 22 to the infrared light is greater than the transmittance of the infrared penetrating reflective film 22 to the visible light, and the reflectivity of the infrared penetrating reflective film 22 to the infrared light is less than the reflectivity of the infrared penetrating reflective film 22 to the visible light, thereby effectively improving the transmittance of the backlight module 20 to infrared light, and the infrared penetrating reflective film 22 can ensure the light output efficiency of the backlight module 20 in the process of reflecting visible light, and shield the sensor 30, thereby improving the display effect of the display device; compared with the existing display device, it can avoid the phenomenon that the infrared light is reflected by the reflective sheet and the sensor 30 cannot sense the infrared light, thereby improving the sensing effect of the sensor 30 in the display device to infrared light, and improving the infrared sensing function of the display device.

[0053] It should be noted that the sensor 30 is provided in the display device provided in the embodiment of the present application, and the sensor 30 is an infrared light sensor to realize sensing and imaging of infrared light.

[0054] In some embodiments, when the display device is used for in-vehicle display, for example, when the display device is used for instrument panel display, the infrared detection function of the sensor 30 can realize seat belt monitoring, fatigue monitoring, and distraction monitoring of the driver.

[0055] Please combine Figure 2 as well as Figure 3 The display device further includes a cover plate 40 , and the cover plate 40 is disposed on the light emitting side of the display panel 10 , and the backlight module 20 is disposed on a side of the display panel 10 away from the cover plate 40 .

[0056] In some embodiments, the cover plate 40 may be a glass cover plate.

[0057] In some embodiments, the display panel 10 includes a panel body 11, a first polarizer 12 and a second polarizer 13 arranged on opposite sides of the panel body 11, the panel body 11 includes an array substrate 111 and an opposing substrate 112 arranged 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 arranged on the side of the second polarizer 13 away from the opposing substrate 112.

[0058] In some embodiments, the backlight module 20 includes a light guide plate 21, an infrared penetrating reflective film 22 arranged on the side of the light guide plate 21 away from the display panel 10, a back plate 25 arranged on the side of the infrared penetrating reflective film 22 away from the light guide plate 21, an optical film 24 arranged between the light guide plate 21 and the display panel 10, and a light source 26 arranged on the side of the light guide plate 21.

[0059] In some embodiments, the backlight module 20 is an edge-entry backlight module, the light guide plate 21 includes a first surface close to the optical film 24, a second surface close to the infrared penetrating reflective film 22, and multiple side surfaces connected between the first surface and the second surface, and the light source 26 is arranged at at least one of the side surfaces, and the light emitting surface of the light source 26 is arranged toward at least one of the side surfaces, so that the light source 26 emits light toward the light guide plate 21.

[0060] In the embodiment of the present application, the sensor 30 is arranged on the side of the infrared penetrating reflective film 22 away from the light guide plate 21, and the infrared penetrating reflective film 22 is arranged in the first display area 1011 and the second display area 1012, that is, the infrared penetrating reflective film 22 continuously covers the first display area 1011 and the second display area 1012; the sensor 30 is located in the first display area 1011, that is, the infrared penetrating reflective film 22 covers the sensor 30, and the infrared penetrating 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 the infrared light is reflected by the reflective sheet and the sensor cannot sense the infrared light can be avoided, thereby 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.

[0061] In some embodiments, the light guide plate 21 is arranged 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 range of the light guide plate 21; that is, the light guide plate 21 provided in the embodiment of the present application is not provided with 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.

[0062] In some embodiments, the infrared transmission reflective film 22 provided in the embodiments of the present application may be a near infrared transmission reflective film (Near infrared transmission System-Reflector film, NSR) or the like.

[0063] In some embodiments, the material of the infrared penetrating reflective film 22 may include polyethylene terephthalate (PET) or polycarbonate (PC).

[0064] In some embodiments, the transmittance of the infrared penetrating reflective film 22 to the infrared light is greater than or equal to 84%, and the reflectance of the infrared penetrating reflective film 22 to the visible light is greater than or equal to 99%; for example, the transmittance of the infrared penetrating reflective film 22 to the infrared light can be 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%, and the reflectance of the infrared penetrating reflective film 22 to the visible light can be 99%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, 99.7%, 99.8%, 99.9%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, 99.7%, 99.9%, 99.9%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, 99.6%, 99.8 ... 7%, 99.8%, 99.9% or 100%, etc.; that is, the infrared penetrating reflective film 22 provided in the embodiment of the present application has a high transmittance to the infrared light, and at the same time, the infrared penetrating reflective film 22 has a high reflectance to the visible light, and further in the embodiment of the present application, the infrared penetrating reflective film 22 is arranged in the backlight module 20 to improve the infrared light transmittance of the backlight module 20, thereby improving the infrared light sensing effect of the sensor 30, and at the same time, the infrared penetrating reflective film 22 has a great reflectivity to the visible light transmitted from one side of the light guide plate 21, and can play the role of a reflective sheet to improve the light utilization rate and the brightness of the backlight module 20.

[0065] In some embodiments, the present invention verifies the spectral transmittance of the infrared penetrating reflective film 22 to obtain the following: Figure 4 The curve diagram shown in Figure 4 The curve shown is the measured data of the transmittance of the infrared penetrating reflective film 22 for light with a wavelength of 380nm-1000nm. Figure 4 It can be seen that the transmittance of the infrared penetrating reflective film 22 to the visible light band (400nm-760nm) is close to 0, thus having high reflectivity, and the transmittance of the infrared penetrating reflective film 22 to the infrared light band (>760nm) is above 84%, thus having high transmittance.

[0066] It can be understood that, since the infrared penetrating reflective film 22 can reflect the visible light on one side of the light guide plate 21 , the sensor 30 can be effectively shielded to improve the display uniformity and integration effect of the display device.

[0067] In some embodiments, a through hole 250 is opened in the back panel 25 and is located in the first display area 1011. The orthographic projection of the through hole 250 on the infrared penetrating reflective film 22 is located within the coverage range of the orthographic projection of the optical film 24 on the infrared penetrating reflective film 22. In the embodiment of the present application, a through hole 250 is opened in the back panel 25 corresponding to the first display area 1011, and the sensor 30 is arranged corresponding to the through hole 250, thereby avoiding interference and interference of the back panel 25 on the photosensitivity of the sensor 30, thereby further improving the photosensitivity effect of the sensor 30.

[0068] 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 greater 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, thereby effectively improving the field of view of the sensor 30 at the through hole 250.

[0069] In some embodiments, the optical film 24 is disposed in 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, and thus the optical film 24 can also adjust and improve the light in the first display area 1011, so that the light output of the first display area 1011 and the light output of the second display area 1012 tend to be uniform, thereby improving the light output uniformity of the backlight module 20 and improving the display uniformity of the display device.

[0070] In some embodiments, the optical film 24 may include a direct lamination reflective polarizer or a direct lamination reflective brightness enhancement film (DLRP).

[0071] 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, and the light adjustment layer 23 is disposed in the first display area 1011 and the second display area 1012; wherein the light adjustment layer 23 switches between a transparent state and a foggy state, and when the light adjustment layer 23 is configured in the transparent state, the light incident on the light adjustment layer 23 from the light guide plate 21 passes through the light adjustment layer 23, and when the light adjustment layer 23 is configured in the foggy state, the light incident on the light adjustment layer 23 from the light guide plate 21 is scattered in the light adjustment layer 23; and further, when the light adjustment layer 23 switches to the transparent state, the sensor 30 can sense infrared light, and when the light adjustment layer 23 switches to the foggy state, the light adjustment layer 23 can scatter the light to act as a diffuser, thereby improving the light output uniformity of the backlight module 20.

[0072] In some embodiments, when the sensor 30 senses the infrared light, the light adjustment layer 23 is configured to the transparent state, and when the sensor 30 stops sensing the infrared light, the light adjustment layer 23 is configured to the foggy state; thus, the light adjustment layer 23 will not affect the photosensitivity of the sensor 30.

[0073] In some embodiments, please combine Figure 3 as well as Figure 5 In the first driving period T1 of the display device, the sensor 30 senses the infrared light, and in the second driving period T2 of the display device, the sensor 30 stops sensing the infrared light, and the first driving period T1 is less than 10ms. Since the first driving period T1 is less than 10ms, the naked eye cannot recognize the screen switching, thereby achieving full-screen display.

[0074] In some embodiments, when the display device is driven for display, the first driving period T1 and the second driving period T2 are performed alternately; and the second driving period T2 is less than 10ms, and then in the first driving period T1, the light adjustment layer 23 is configured as the transparent state, and the sensor 30 senses the infrared light, and then the infrared light sensing effect and imaging effect of the sensor 30 can be effectively improved; in the second driving period T2, the light adjustment layer 23 is configured as the foggy state, and the sensor 30 stops sensing the infrared light, and then the light adjustment layer 23 can be used as a diffuser to diffuse the light emitted by the backlight module 20, thereby improving the light emission uniformity of the backlight module 20 and the display uniformity of the display device; wherein, the first driving period T1 and the second driving period T2 are both less than 10ms, and then the naked eye cannot recognize the screen switching, that is, full-screen display can be achieved, and the infrared light sensing effect and imaging effect of the sensor 30 can also be effectively improved.

[0075] In some embodiments, please combine Figure 3 as well as Figure 6 The light adjustment layer 23 includes a first substrate 231 and a second substrate 232 arranged opposite to each other, an electrode layer 233 arranged 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 a polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, PDLC) or a polymer network steady liquid crystal (Polymer Network Steady Liquid Crystal, PNLC).

[0076] In some embodiments, the electrode layer 233 includes a first electrode layer 2331 disposed on a side of the first substrate 231 close to the liquid crystal layer 234 and a second electrode layer 2332 disposed on a side of the second substrate 232 close to the liquid crystal layer 234 .

[0077] It should be noted that the liquid crystal layer 234 includes polymer network liquid crystal or polymer dispersed liquid crystal, wherein the polymer dispersed liquid crystal is mainly low molecular liquid crystal and prepolymer polymerization reaction under certain conditions, forming liquid crystal droplets dispersed in the polymer network. The liquid crystal in the polymer network steady-state liquid crystal is distributed in the polymer three-dimensional network to form a continuous channel network. Taking polymer dispersed liquid crystal as an example, in the absence of an 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. At this time, when light is irradiated on the polymer dispersed liquid crystal, scattering occurs, so the polymer dispersed liquid crystal is in an atomized state as a whole. When the polymer dispersed liquid crystal is in an electric field, the optical axis of the liquid crystal droplets is consistent with the direction of the electric field, and at this time, its effective refractive index n0 matches the refractive index np of the polymer, and there is no obvious interface between the two. At this time, when light is irradiated on the polymer dispersed liquid crystal, the light will not be scattered, so the polymer dispersed liquid crystal is transparent as a whole. As for the trans-polymer dispersed liquid crystal, its working state is opposite to that of the polymer dispersed liquid crystal, that is, when no electric field is applied, the trans-polymer dispersed liquid crystal is in a transparent state, and when an external electric field is applied, the trans-polymer dispersed liquid crystal is in an atomized state. Therefore, by controlling whether an electric field is applied, the polymer liquid crystal can be controlled to be in an atomized state or a transparent state, so that the light adjustment layer 23 has a switchable fog state and a transparent state. When the sensor 30 stops sensing infrared light, the light adjustment layer 23 is in a fog state, thereby scattering the light emitted from one side of the light guide plate 21, thereby uniformly providing backlight for the display panel 10, improving the display uniformity of the display device, thereby realizing a full-screen design and meeting the user's demand 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 is conducive to ensuring the normal operation of the sensor 30 and meeting the user's photosensitivity requirements for the display device.

[0078] It can be understood that, in the backlight module 20 provided in the embodiment of the present application, the infrared penetrating reflective film 22, the light guide plate 21, the light adjustment layer 23 and the optical film 24 are all arranged in the first display area 1011 and the second display area 1012, that is, the infrared penetrating reflective film 22, the light guide plate 21, the light adjustment layer 23 and the optical film 24 are all arranged in a whole layer, and it is only necessary to open a hole at the position of the back plate 25 corresponding to the first display area 1011. Therefore, in the embodiment of the present application, the first display area 1011 and the sensor 30 can be correspondingly arranged at any position in the display area 101, relative to Figure 1For the existing display device shown, the position of the first sensor 6 will not be limited by the opening 7 formed in the backlight module; on the other hand, since the optical film layer in the backlight module 20 provided in the embodiment of the present application is not opened, the display device provided in the embodiment of the present application can flexibly set the position of the first display area 1011 and the sensor 30 according to actual needs, and then according to the position of the first display area 1011 and the sensor 30, the back panel 25 with the through holes 250 corresponding to the first display area 1011 and the sensor 30 can be added; that is, the display device provided in the embodiment of the present application is equipped with the back panel 25 with through holes 250 located at different positions, so that the sensor 30 can be located at different positions, thereby improving the applicability of the display device and reducing the cost of the display device.

[0079] In some embodiments, the first display area 1011 can be located at any position within the display area 101, and the second display area 1012 can be arranged around the first display area 1011, or the second display area 1012 can be arranged to semi-surround the first display area 1011, or the first display area 1011 is located on one side of the display area 101, and the second display area 1012 is located on the other side of the display area 101.

[0080] In addition, since the setting of the first display area 1011 and the sensor 30 in the embodiment of the present application 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 photosensitivity function and photosensitivity effect of the display device.

[0081] Furthermore, the embodiments of the present application are Figure 3 The imaging effect of the sensor 30 of the display device is verified, and an embodiment and comparative examples 1 and 2 are provided.

[0082] Among them, in the embodiment, there are Figure 3 The display device shown in FIG. Figure 3 The imaging effect of the sensor 30 in the display device shown in FIG. Fig. 9 Results shown.

[0083] In Comparative Example 1, there is Figure 7The display device shown in the figure, wherein the display device includes a first panel body 1a, a first upper polarizer 3a arranged on the light emitting side of the first panel body 1a, a first cover plate 8a arranged on the side of the second polarizer 3a away from the panel body 1a, a first lower polarizer 2a arranged on the side of the first panel body 1a away from the second polarizer 3a, a prism sheet 7a arranged on the side of the first lower polarizer 2a away from the first panel body 1a, a second light guide plate 6a arranged on the side of the prism sheet 7a away from the first lower polarizer 2a, a first infrared penetrating reflective film 5a arranged on the side of the second light guide plate 6a away from the prism sheet 7a, a second back plate 4a arranged on the side of the first infrared penetrating reflective film 5a away from the second light guide plate 6a, and a second sensor 9a, wherein the second back plate 4a is provided with a through hole corresponding to the second sensor 9a, and is for Figure 7 The imaging effect of the second sensor 9a in the display device shown in FIG. Fig.10 Results shown.

[0084] In Comparative Example 2, there is Figure 8 The display device shown in the figure, wherein the display device includes a second panel body 1b, a second upper polarizer 3b arranged on the light emitting side of the second panel body 1b, a second cover plate 8b arranged on the side of the second upper polarizer 3b away from the second panel body 1b, a first lower polarizer 2b arranged on the side of the second panel body 1b away from the second upper polarizer 3b, a brightness enhancement film 72b arranged on the side of the first lower polarizer 2b away from the second panel body 1b, a diffuser 71b arranged on the side of the brightness enhancement film 72b away from the first lower polarizer 2b, a third light guide plate 6b arranged on the side of the diffuser 71b away from the brightness enhancement film 72b, a second infrared penetrating reflective film 5b arranged on the side of the third light guide plate 6b away from the diffuser 71b, a third back plate 4b arranged on the side of the second infrared penetrating reflective film 5b away from the third light guide plate 6b, and a third sensor 9b, wherein the third back plate 4b is provided with a through hole corresponding to the third sensor 9b, and is for Figure 8 The imaging effect of the third sensor 9b in the display device shown in FIG. Fig.11 Results shown.

[0085] Depend on Fig. 9 , Fig.10 as well as Fig.11 It can be seen that the embodiments of the present application provide Figure 3 The display device shown can obtain clear images and can effectively realize functions such as recognition and detection. However, the images in Comparative Examples 1 and 2 are blurred and deformed, which will make the display device difficult to recognize; for example Fig.10The prism sheet 7a and Fig.11 The diffusion sheets 71b in the structure will have a serious impact on the transmittance of infrared light, thereby affecting the imaging effect and sensing function of the sensors 9a and 9b.

[0086] In summary, the embodiment of the present application sets the infrared penetrating reflective film 22 between the light guide plate 21 and the sensor 30, and the transmittance of the infrared penetrating reflective film 22 to infrared light is greater than the transmittance of the infrared penetrating reflective film 22 to visible light, and the reflectivity of the infrared penetrating reflective film 22 to infrared light is less than the reflectivity of the infrared penetrating reflective film 22 to visible light, thereby effectively improving the transmittance of the backlight module 20 to infrared light, and the infrared penetrating reflective film 22 can ensure the light output efficiency of the backlight module 20 in the process of reflecting visible light, and shield the sensor 30, thereby improving the display effect of the display device; compared with the existing display device, it can avoid the phenomenon that the infrared light is reflected by the reflective sheet and the sensor 30 cannot sense the infrared light, thereby improving the sensing effect of the sensor 30 in the display device to infrared light, and improving the infrared sensing function of the display device.

[0087] Also, please refer to Figure 2 as well as Fig.12 , an embodiment of the present application further provides an electronic device 50, and the electronic device 50 includes a display device 51 as described in the above embodiment.

[0088] It should be noted that the sensor 30 is provided in the electronic device 50 provided in the embodiment of the present application, and the sensor 30 is an infrared light sensor to achieve sensing and imaging of infrared light.

[0089] In some embodiments, when the electronic device 50 is a vehicle-mounted display device, for example, when the electronic device 50 is a dashboard display device, the infrared detection function of the sensor 30 can realize seat belt monitoring, fatigue monitoring, and distraction monitoring of the driver.

[0090] It can be understood that the electronic device 50 includes the display device 51 described in the above embodiment. Therefore, the electronic device 50 has the same beneficial effects as the display device 51 in the above embodiment, which will not be described in detail.

[0091] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0092] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0093] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0094] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display device, characterized in that: The display device comprises a display area, wherein the display area comprises 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, arranged on one side of the display panel; A sensor, arranged on a side of the backlight module away from the display panel and located in the first display area; Among them, the backlight module includes a light guide plate arranged between the display panel and the sensor and an infrared penetrating reflective film arranged between the light guide plate and the sensor, the infrared penetrating reflective film is arranged in the first display area and the second display area, the transmittance of the infrared penetrating reflective film to infrared light is greater than the transmittance of the infrared penetrating reflective film to visible light, and the reflectivity of the infrared penetrating reflective film to the infrared light is less than the reflectivity of the infrared penetrating reflective film to the visible light.

2. The display device according to claim 1, characterized in that 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 range of the light guide plate.

3. The display device according to claim 1, characterized in that The backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, and the light adjustment layer is disposed in the first display area and the second display area; The light adjustment layer switches between a transparent state and a foggy state. When the light adjustment layer is configured in the transparent state, the 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 foggy state, the 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, characterized in that: When the sensor senses the infrared light, the light adjustment layer is configured to be in the transparent state, and when the sensor stops sensing the infrared light, the light adjustment layer is configured to be in the foggy state.

5. The display device according to claim 4, characterized in that: The sensor of the display device senses the infrared light in a first driving period, and the sensor of the display device stops sensing the infrared light in a second driving period, and the first driving period is less than 10 ms.

6. The display device according to claim 5, characterized in that: When the display device is driven for display, the first driving period and the second driving period are performed alternately.

7. The display device according to any one of claims 3 to 6, characterized in that: The light adjustment layer includes a first substrate and a second substrate arranged opposite to each other, an electrode layer arranged on the first substrate and / or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate, and 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, characterized in that: The backlight module further includes an optical film disposed between the light adjustment layer and the display panel, and the optical film is disposed in the first display area and the second display area.

9. The display device according to claim 8, characterized in that: The backlight module also includes a back plate arranged on the side of the infrared penetrating reflective film away from the light guide plate, and a through hole located in the first display area is opened in the back plate, and the orthographic projection of the through hole on the infrared penetrating reflective film is located within the coverage range of the orthographic projection of the optical film on the infrared penetrating reflective film.

10. The display device according to claim 9, characterized in that: The orthographic projection of the sensor on the back plate is located in 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, characterized in that: The transmittance of the infrared penetrating reflective film to the infrared light is greater than or equal to 84%, and the reflectance of the infrared penetrating reflective film to the visible light is greater than or equal to 99%.

Images