Display module and electronic device

Abstract

The application provides a display module and an electronic device. The display module comprises an ultraviolet filter structure, an ultraviolet light conversion layer, a polarizer and a light sensor. The ultraviolet filter structure transmits ultraviolet light from outside. The ultraviolet light conversion layer can convert the ultraviolet light from the ultraviolet filter structure into visible light or infrared light. The ultraviolet light conversion layer transmits the visible light or infrared light through the polarizer and into the light sensor. The display module and the electronic device provided by the application have the ultraviolet filter structure, which is beneficial to reducing the influence of external visible light on ultraviolet light detection and improving the accuracy of ultraviolet light detection.

Description

Technical Field

[0001] This application relates to the field of display and electronic devices, and more specifically, to display modules and electronic devices. Background Technology

[0002] Users can obtain information related to ultraviolet (UV) light intensity through electronic devices to take appropriate UV protection measures. Electronic devices can, for example, detect UV light intensity using a light sensor. To reduce the space required for the light sensor, it can be stacked with the display module of the electronic device, located outside the display area of ​​the module. This prevents interference between the light sensor and the display area and helps reduce its impact on the screen-to-body ratio of the electronic device. However, external light undergoes a series of changes after passing through multiple optical structural layers of the display module, which can affect the detection accuracy of the light sensor. Summary of the Invention

[0003] This application provides a display module and an electronic device, the purpose of which is to improve the accuracy of ultraviolet light detection.

[0004] In a first aspect, a display module is provided, comprising a stacked ultraviolet filter structure, an ultraviolet light conversion layer, a polarizer, and a display panel, wherein the ultraviolet light conversion layer is located between the ultraviolet filter structure and the polarizer, and the display panel is located on the side of the polarizer away from the ultraviolet filter structure.

[0005] The display panel includes a light-emitting unit, a first light sensor, a front panel, and a back panel. The light-emitting unit is located between the front panel and the back panel, and the first light sensor is located between the front panel and the back panel. The orthographic projection of the light-emitting unit on the back panel and the orthographic projection of the first light sensor on the back panel do not intersect each other.

[0006] The light emitted by the light-emitting unit is configured to exit the display module through the polarizer;

[0007] The ultraviolet filter structure is used to receive light incident on the display module and emit ultraviolet light filtered by the ultraviolet filter structure.

[0008] The ultraviolet light conversion layer is used to convert ultraviolet light from the ultraviolet filter structure into visible light or infrared light, and the light emitted from the ultraviolet light conversion layer is configured to enter the first optical sensor through the polarizer;

[0009] The first optical sensor is used to detect the light intensity from the polarizer.

[0010] Integrating a light sensor within the display module frees up space for other components in the electronic device. It also reduces the need for cutting processes involving polarizers and display panels, lowering process complexity and improving space utilization. By placing the light sensor within the display module, the light entering the sensor can pass through the polarizer. Polarizers absorb ultraviolet light, which could potentially affect the light sensor's detection of ultraviolet light. By incorporating an ultraviolet filter and an ultraviolet conversion layer, the light exiting the ultraviolet conversion layer is converted to visible or infrared light, thus reducing the influence of the polarizer on the light sensor's ultraviolet light detection.

[0011] This application employs an ultraviolet (UV) filter structure, which provides a relatively stable UV filtering function. This allows for a relatively high and stable proportion of UV light entering the UV conversion layer, enabling electronic devices or display modules to detect the intensity of external UV light relatively accurately. If two light sensors are used, one detecting visible and infrared light, and the other detecting visible, infrared, and UV light, their detection errors for visible light may not be identical. Therefore, using two sensors may not necessarily cancel each other out. Since most of the external natural light is visible light, and a small portion is UV light, if a light sensor can detect a relatively large amount of visible light, the error range of its visible light detection may be comparable to the intensity of the UV light detected by the same sensor. Therefore, the error in UV light detection may be relatively large.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the ultraviolet filter structure includes a first part and a second part, the first part being used to emit light filtered by the first part to the ultraviolet light conversion layer, and the second part being used to emit light filtered by the second part to the polarizer, the orthographic projection of the ultraviolet light conversion layer onto the ultraviolet filter structure being located outside the second part, and the first photosensitive sensor being disposed opposite to the first part; the display module further includes:

[0013] The second light sensor is located on the side of the polarizer away from the ultraviolet filter structure and is disposed opposite to the second part. The second light sensor is used to detect the light intensity from the polarizer.

[0014] The first optical sensor may detect visible light transmitted through the ultraviolet filter layer, potentially leading to errors in the detected ultraviolet light intensity. In other words, the first optical sensor detects not only external ultraviolet light but also a small amount of visible light, resulting in a relatively high detected intensity. Since the second optical sensor can detect visible light transmitted through the ultraviolet filter layer, combining the detection results from both sensors to determine the ultraviolet light intensity helps reduce detection errors. Furthermore, combining the results from both sensors also helps reduce the impact of dark current on the accuracy of ultraviolet light detection. By using two optical sensors to address the influence of visible light and dark current on ultraviolet light detection, the space required for these sensors in electronic devices can be reduced.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the current flowing through the first optical sensor is I1, the current flowing through the second optical sensor is I2, and the intensity of the external ultraviolet light is L. 0,UV satisfy:

[0016] L 0,UV = (I1-k1·I2) / k2,

[0017] Where k1 is 1 or T VL T VL The transmittance of visible or infrared light in the ultraviolet light conversion layer;

[0018] k2 is obtained from one or more of the following: the ultraviolet light transmittance T of the ultraviolet filter structure. UV The conversion efficiency η of the ultraviolet light conversion layer UV The visible light or infrared light transmittance T of the polarizer POL The photoelectric conversion efficiency E1 of the first optical sensor.

[0019] Inferring the intensity of external ultraviolet light based on the optical properties of each component within the display module is beneficial for improving the accuracy of ultraviolet light detection.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the display module further includes a light-shielding layer, which is disposed around the outer periphery of the ultraviolet filter structure.

[0021] On the one hand, the light-shielding layer can block light from the outside, allowing light to pass through the area enclosed by the light-shielding layer and enter the light sensor. On the other hand, the light-shielding layer can also absorb light emitted by the light-emitting unit, which helps to reduce the impact of the light emitted by the light-emitting unit on ultraviolet light detection, thereby improving the accuracy of ultraviolet light detection.

[0022] In conjunction with the first aspect, in some implementations of the first aspect, the ultraviolet filter structure includes a stacked ultraviolet filter ink and a silver nanofilm.

[0023] The layered ultraviolet filter ink and silver nanofilm absorb or filter out most of the visible light, which helps to reduce the proportion of visible light that passes through the ultraviolet filter layer.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the silver nanofilm is located on the side of the ultraviolet filter ink closer to the polarizer.

[0025] A small portion of the visible light passing through the UV filter ink can be further absorbed by the silver nanofilm. The visible light reflected by the silver nanofilm can then enter the UV filter ink and be absorbed by it.

[0026] In conjunction with the first aspect, in some implementations of the first aspect, the orthographic projection of the ultraviolet filter structure onto the polarizer lies within the orthographic projection of the ultraviolet conversion layer onto the polarizer.

[0027] In one embodiment, the edge of the ultraviolet light conversion layer extends relative to the ultraviolet filter structure.

[0028] This allows light emitted in a divergent manner from the edge of the ultraviolet filter layer to penetrate the ultraviolet conversion layer as much as possible.

[0029] In conjunction with the first aspect, in some implementations of the first aspect, the ultraviolet light conversion layer is used to convert ultraviolet light of a first wavelength from the ultraviolet filter structure into visible light or infrared light of a second wavelength, and the first light sensor is specifically used to detect the visible light or infrared light of the second wavelength.

[0030] The first optical sensor detects light of a specific wavelength converted by the ultraviolet light conversion layer, which helps to reduce the detection of other wavelengths of light by the optical sensor, thereby improving the accuracy of ultraviolet light detection.

[0031] In conjunction with the first aspect, in some implementations of the first aspect, the display module further includes a third light sensor, the ultraviolet light conversion layer is used to convert ultraviolet light of a third wavelength from the ultraviolet filter structure into visible light or infrared light of a fourth wavelength, the light emitted from the ultraviolet light conversion layer is configured to pass through the polarizer and enter the third light sensor, the third light sensor is used to detect the visible light or infrared light of the fourth wavelength.

[0032] Since different types of ultraviolet light have different effects on the human body, testing different types of ultraviolet light separately is beneficial for providing users with appropriate sun protection strategies based on the light intensity of various types of ultraviolet light in the environment.

[0033] In conjunction with the first aspect, in some implementations of the first aspect, the display module further includes a cover plate, and the ultraviolet filter structure is disposed on the cover plate.

[0034] The cover plate can be relatively large, and relatively large ultraviolet light conversion structures and ultraviolet filter structures can be set on the display module, which will help improve the ultraviolet light detection performance of the display module.

[0035] In conjunction with the first aspect, in some implementations of the first aspect, the ultraviolet light conversion layer is attached to the ultraviolet filter structure.

[0036] The ultraviolet light conversion layer and the ultraviolet filter structure can be laminated together, which helps to reduce the loss of ultraviolet light as it passes through the ultraviolet light conversion layer and the ultraviolet filter structure.

[0037] In conjunction with the first aspect, in some implementations of the first aspect, the display module further includes a display panel, the display panel including a front panel and a back panel, the first light sensor being encapsulated between the front panel and the back panel, and the first light sensor being electrically connected to a driving circuit on the back panel.

[0038] The packaging of the light sensor can adopt the packaging of the display panel, which helps to reduce the cutting process of polarizers, display panels, etc. due to the setting of the light sensor, reduce process complexity and improve space utilization.

[0039] In a second aspect, an electronic device is provided, including a display module as described in any of the implementations of the first aspect above. Attached Figure Description

[0040] Figure 1 This is a schematic structural diagram of an electronic device provided in an embodiment of this application.

[0041] Figure 2 This is a schematic structural diagram of another electronic device provided in the embodiments of this application.

[0042] Figure 3 This is a partial structural diagram of a display module provided in an embodiment of this application.

[0043] Figure 4 This is an electrical connection structure diagram of an electronic device provided in an embodiment of this application.

[0044] Figure 5 This is a schematic structural diagram of an ultraviolet detection region provided in an embodiment of this application.

[0045] Figure 6 This is a schematic structural diagram of another ultraviolet detection region provided in the embodiments of this application.

[0046] Figure 7 This is a schematic structural diagram of another ultraviolet detection region provided in the embodiments of this application.

[0047] Figure 8 This is a schematic structural diagram of another ultraviolet detection region provided in the embodiments of this application.

[0048] Figure 9 This is a graph showing the relationship between dark current and temperature in a photosensitive sensor.

[0049] Figure 10 This is a schematic diagram of the filtering parameters of an ultraviolet filter ink provided in an embodiment of this application.

[0050] Figure 11 This is a schematic diagram of the filtering parameters of a silver nanofilm provided in an embodiment of this application.

[0051] Figure 12 This is a schematic structural diagram illustrating the filtering principle of a superimposed ultraviolet filter ink and silver nanofilm provided in an embodiment of this application.

[0052] Figure 13 This is a schematic diagram of the filtering parameters of a superimposed ultraviolet filter ink and silver nanofilm provided in an embodiment of this application.

[0053] Figure 14 This is a software architecture diagram of an electronic device provided in an embodiment of this application.

[0054] Figure 15 This is a graph showing the relationship between ultraviolet light intensity and illuminance obtained by a light sensor, provided in an embodiment of this application.

[0055] Figure 16 This is a schematic structural diagram of a user interface provided in an embodiment of this application.

[0056] Figure 17 This is a schematic structural diagram of another user interface provided in the embodiments of this application. Detailed Implementation

[0057] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0058] Figure 1 , Figure 2 This is a schematic structural diagram of an electronic device 100 provided in an embodiment of this application. The electronic device 100 may be, for example, a terminal consumer product or a 3C electronic product (computer, communication, consumer electronic product), such as a mobile phone, power bank, laptop, tablet computer, e-reader, laptop computer, digital camera, wearable device, headphones, etc. Figure 1The illustrated embodiment uses a watch as an example of an electronic device 100. Figure 2 The illustrated embodiment uses a mobile phone as an example of an electronic device 100.

[0059] Electronic device 100 may include a housing, a display module 20, and one or more light sensors 30. Specifically, the housing may include a bezel 10 and a back cover. The bezel 10 may be located between the display module 20 and the back cover. The bezel 10 may surround the outer periphery of both the display module 20 and the back cover. Multiple light-emitting units are disposed within the display module 20. Light emitted by the light-emitting units can exit the display area of ​​the display module 20, allowing the user to observe the image displayed by the electronic device 100 within the display area of ​​the display module 20. The display area of ​​the display module 20 may refer to the area of ​​the display module 20 used for displaying images.

[0060] The light sensor 30 can be encapsulated within the display module 20, or stacked on top of the display module 20. In one embodiment of this application, the light sensor 30 can be located outside the display area of ​​the display module 20 to avoid obstructing the display area. The light sensor 30 can correspond to the ultraviolet light detection area of ​​the display module 20. The ultraviolet light detection area can be located between the display area and the bezel of the display module 20. The ultraviolet light detection area can be the area enclosed by the light inlet 40 of the display module 20. Light from the outside can pass through the light inlet 40 of the display module 20 and enter the light sensor 30, so that the light sensor 30 can detect the light intensity from the outside. The light intensity detected by the light sensor 30 can reflect the light intensity of the outside ultraviolet light. The light emitted by the light-emitting unit can be substantially contained within the light inlet 40 of the display module 20. Figure 1 , Figure 2 The light inlet 40 shown is merely illustrative, and the size and number of light inlets 40 are not limited in the embodiments of this application. In other embodiments of this application, the light sensor 30 may also be located between the display module 20 and the bezel 10.

[0061] The optical sensor 30 may be referred to as a photodiode (PD), photodetector (PD), etc. The optical sensor 30 includes, but is not limited to, any of the following: low-temperature polysilicon (LTPS) PD, oxide PD, and organic PD.

[0062] The display area of ​​the display module 20 and the light sensor 30 can be independent of each other. For example, the light sensor 30 will not block the light emitted by the display module 20, thus not obstructing the display area of ​​the display module 20 from displaying the image. Light from the display area of ​​the display module 20 may not enter the light sensor 30, or the amount of light entering the light sensor 30 from the display area of ​​the display module 20 may be so small as to be negligible.

[0063] The light sensor 30 can be disposed, for example, at the upper part of the front of the electronic device 100 (the front of the electronic device 100 can refer to the side that the user frequently observes, such as the side of the electronic device 100 where the display area is located). Figure 1 In the illustrated embodiment, the light sensor 30 may be located at the upper part of the dial, such as the upper left (e.g., the upper left part). Figure 1 (as shown) or the upper right part. In Figure 2 In the illustrated embodiment, the light sensor 30 may be located at the top of the phone display surface, for example, around components such as the front-facing camera and earpiece.

[0064] Based on common user habits, users rarely operate the electronic device 100 from its top, as this could cause their hands to significantly obstruct the display area of ​​the display module 20, affecting their ability to observe the display. Compared to other surfaces of the electronic device 100, its front is more likely to face ultraviolet light sources (such as the sun) when used outdoors. Therefore, placing the light sensor 30 at the top of the front of the electronic device 100 improves the ease of detecting ultraviolet light. For example, it helps avoid users having to change the device's orientation to detect ultraviolet light, and it also prevents users from interrupting their operation of the device to detect ultraviolet light.

[0065] In other embodiments, the light sensor 30 may be located in other areas of the electronic device 100, such as the back of the electronic device 100, the lower part of the front of the electronic device 100, the side of the electronic device 100, etc. The embodiments of this application may not limit the orientation of the light sensor 30 within the electronic device 100.

[0066] In cases where the electronic device 100 includes multiple light sensors 30, in some embodiments, the multiple light sensors 30 may be arranged parallel to the bezel 10, for example. This arrangement of the multiple light sensors 30 is beneficial for increasing the screen-to-body ratio of the electronic device 100. Figure 1 Taking the watch shown as an example, where the bezel 10 can be considered a ring, multiple light sensors 30 can be arranged on the same ring, which is different in size from the bezel 10 but coaxial with it. Figure 2Taking the mobile phone shown as an example, when the frame 10 can be regarded as a square ring, multiple light sensors 30 can be arranged along the same side of the frame 10 and set close to that side.

[0067] In other embodiments, the plurality of light sensors 30 may also be arranged perpendicular to the frame 10. That is, the plurality of light sensors 30 may be arranged from the outside in relative to the frame 10. The plurality of light sensors 30 may also be arranged in other patterns in the electronic device 100. The embodiments of this application may not limit the arrangement pattern of the plurality of light sensors 30 in the electronic device 100.

[0068] exist Figure 1 , Figure 2 The dashed circle outlines a local area of ​​the display module 20. Figure 3 A schematic structural diagram of this local area is shown. This local area may include a portion of the display area of ​​the display module 20 and the ultraviolet light detection area of ​​the display module 20. The following is in conjunction with... Figures 1 to 3 This paper describes the structure of a display module 20 provided in an embodiment of this application.

[0069] The display module 20 may include a cover plate 310, an optical adhesive layer 320, a polarizer 330, and a display panel 340. The display panel 340 may include a front panel 341, multiple light-emitting units 343, a back panel 342, and a light sensor 30. The cover plate 310, optical adhesive layer 320, polarizer 330, front panel 341, and back panel 342 of the display panel 340 may be distributed in the display area and the ultraviolet light detection area of ​​the display module 20. The display area may refer to the area of ​​the display module 20 used to display images. The ultraviolet light detection area may refer to the area of ​​the display module 20 used to capture light from the outside environment. The light-emitting units 343 may be distributed in the display area of ​​the display module 20. The light sensor 30 may be distributed in the ultraviolet light detection area of ​​the display module 20.

[0070] The backplate 342 of the display panel 340 may include an insulating material and a driving circuit for the light-emitting unit 343. The driving circuit may be encapsulated within the insulating material. The insulating material may be, for example, glass or polyimide (PI).

[0071] The light-emitting unit 343 can be the light source of the display module 20. For example, the light-emitting unit 343 can be an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, or a Micro-OLED. By changing the power-on state of the light-emitting unit 343, the display module 20 can display various images.

[0072] The light-emitting unit 343 can be disposed on the back plate 342 of the display panel 340 and electrically connected to the driving circuit on the back plate 342. The electronic device 100 can control the light-emitting unit 343 through the driving circuit on the back plate 342, such as driving the light-emitting unit 343 to emit light, controlling the light intensity of the light-emitting unit 343, and turning off the light-emitting unit 343.

[0073] The light emitted by the light-emitting unit 343 can pass through the front panel 341 of the display panel 340 and thus exit the display panel 340. The front panel 341 can be used to encapsulate the light-emitting unit 343 and the back panel 342 together to protect the light-emitting unit 343.

[0074] Light emitted from the display panel 340 can pass through the polarizer 330 and the optical adhesive layer 320, exiting the cover plate 310 to exit the display module 20. The polarizer 330 can be disposed on the display panel 340, for example. The optical adhesive layer 320 bonds the cover plate 310 and the polarizer 330 together. The polarizer 330 can be used to change the polarization characteristics of light. The polarizer 330 can increase light scattering, thereby widening the viewing angle of the display module 20. The polarizer 330 can also absorb ultraviolet light. The cover plate 310 and the optical adhesive layer 320 can have good light transmittance. The cover plate 310 can provide mechanical protection for the display module 20. The cover plate 310 can also have other functions, such as fingerprint prevention. The main material of the cover plate 310 can be, for example, glass, colorless polyimide (CPI), etc.

[0075] In other embodiments, the display module 20 may further include a light-absorbing layer ( Figure 3 (Not shown). The light-absorbing layer can be, for example, foam, metal foil, etc. The light-absorbing layer can be disposed on the side of the display panel 340 away from the cover plate 310. Light from the outside can pass through the display panel 340 and enter the light-absorbing layer, where it is absorbed. The light-absorbing layer is beneficial for shielding the internal structure of the electronic device 100.

[0076] Similar to the light-emitting unit 343, the light sensor 30 can be encapsulated within the display panel 340. The light sensor 30 can be located between the back panel 342 and the front panel 341 of the display panel 340. This reduces the need for cutting processes on the polarizer 330, display panel 340, etc., lowers process complexity, and improves space utilization. The orthographic projection of the light-emitting unit 343 onto the back panel 342 can be non-intersecting with the orthographic projection of the light sensor 30 onto the back panel 342. The orthographic projections of the light-emitting unit 343 and the light sensor 30 onto the back panel 342 can be spaced apart. This helps reduce the impact of light emitted by the light-emitting unit 343 on the light sensor 30 and also reduces the possibility of the light sensor 30 interfering with the light emitted by the light-emitting unit 343.

[0077] exist Figure 3 In the illustrated embodiment, the display module 20 may further include an ultraviolet filter layer 361 and an ultraviolet light conversion layer 362. Light from the outside can enter the display module 20 and pass through the ultraviolet filter layer 361. The ultraviolet filter layer 361 can receive the light entering the display module 20 and emit the filtered ultraviolet light into the ultraviolet light conversion layer 362. The ultraviolet light conversion layer 362 is used to convert the ultraviolet light from the ultraviolet filter layer 361 into visible light or infrared light.

[0078] The ultraviolet filter layer 361 and the ultraviolet conversion layer 362 can be located in the ultraviolet light detection area. The ultraviolet filter layer 361 and the ultraviolet conversion layer 362 can be located on the side of the polarizer 330 closest to the cover plate 310. For example, the ultraviolet filter layer 361 and the ultraviolet conversion layer 362 can be located between the cover plate 310 and the polarizer 330. Figure 3 As shown, the ultraviolet filter layer 361 can be disposed on the cover plate 310, and the ultraviolet light conversion layer 362 can be located between the ultraviolet filter layer 361 and the optical adhesive layer 320. In other possible embodiments, the ultraviolet light conversion layer 362 can be disposed on the polarizer 330, and the ultraviolet filter layer 361 can be located between the ultraviolet light conversion layer 362 and the optical adhesive layer 320.

[0079] To reduce the loss of ultraviolet light incident on the ultraviolet detection area, in some embodiments of this application, the orthographic projection area of ​​the ultraviolet light conversion layer 362 on the cover plate 310 can be larger than the orthographic projection area of ​​the ultraviolet filter layer 361 on the cover plate 310. The orthographic projection of the ultraviolet filter layer 361 on the cover plate 310 can be located within the orthographic projection of the ultraviolet light conversion layer 362 on the cover plate 310. That is, the edge of the ultraviolet light conversion layer 362 can extend relative to the edge of the ultraviolet filter layer 361, so that light emitted in a divergent manner from the edge of the ultraviolet filter layer 361 can enter the ultraviolet light conversion layer 362 as much as possible. In addition, the ultraviolet light conversion layer 362 and the ultraviolet filter layer 361 can be attached to each other, which is beneficial to reducing the loss of ultraviolet light incident on the ultraviolet detection area.

[0080] In some other embodiments, the display module 20 may further include a light-shielding layer 363. The light-shielding layer 363 may surround the outer periphery of the ultraviolet filter layer 361. The light-shielding layer 363 may be used to absorb light, such as visible light, ultraviolet light, infrared light, etc. On the one hand, light illuminating the area around the ultraviolet filter layer 361 can be absorbed by the light-shielding layer 363, and light illuminating the area enclosed by the light-shielding layer 363 can enter the ultraviolet filter layer 361. That is, light from the outside can enter the light sensor 30 through the area enclosed by the light-shielding layer 363. On the other hand, the light emitted by the light-emitting unit 343 in the display panel 340 may diverge in multiple directions. The light emitted by the light-emitting unit 343 near the ultraviolet filter layer 361 may be reflected on the area of ​​the cover plate 310 near the ultraviolet filter layer 361 and enter the light sensor 30, affecting the detection of the light sensor 30. By setting a light-shielding layer 363 around the outer periphery of the ultraviolet filter layer 361, a small amount of light emitted by the light-emitting unit 343 near the ultraviolet filter layer 361 can be absorbed by the light-shielding layer 363, which helps to reduce the influence of the light emitted by the light-emitting unit 343 on ultraviolet light detection, thereby improving the accuracy of ultraviolet light detection.

[0081] Figure 4 Taking a watch as an example, a schematic structural diagram of an electronic device 100 provided in an embodiment of this application is shown. Figure 4 The electrical connection scheme inside the electronic device 100 is shown. The electrical connection schemes for other types of electronic devices 100 (such as mobile phones) can be referred to. Figure 4 The example shown.

[0082] Combination Figure 3 , Figure 4A first driving circuit 354 may be disposed on the back panel 342 of the display panel 340. The first driving circuit 354 can be used to drive the light-emitting unit. The first driving circuit 354 may include a first circuit and a second circuit. The first terminal of the first circuit and the first terminal of the second circuit may be electrically connected to the two terminals of the light-emitting unit, respectively. The second terminal of the first circuit and the second terminal of the second circuit may be electrically connected to the two terminals of the light-emitting unit driving integrated circuit (IC), respectively.

[0083] Combination Figure 3 , Figure 4 A second driving circuit 353 can be disposed on the back panel 342 of the display panel 340. The second driving circuit 353 can be used to drive the light sensor 30. Taking the light sensor 30 as an example, the second driving circuit 353 may include a third circuit and a fourth circuit. The first terminals of the third circuit and the fourth circuit can be electrically connected to the two ends of the light sensor, respectively. The second terminals of the third circuit and the fourth circuit can be electrically connected to the two ends of the light sensor driver IC, respectively.

[0084] exist Figure 4 In the illustrated embodiment, the electronic device 100 may include a circuit board 352 and a motherboard 351. The circuit board 352 is electrically connected to the motherboard 351. The motherboard 351 may have a light-emitting unit driver IC and a light sensor driver IC. The second terminals of the first circuit, the second circuit, the third circuit, and the fourth circuit are respectively electrically connected to the four pins of the circuit board 352. The light-emitting unit driver IC can control the light-emitting unit through the circuit board 352 and the first driver circuit 354. The light sensor driver IC can detect the signal output by the light sensor through the circuit board 352 and the second driver circuit 353. Figure 4 In the illustrated embodiment, the circuit board 352 may be, for example, a flexible printed circuit board (FPC).

[0085] Figure 5 It shows Figure 3 The diagram shows a schematic structure of the ultraviolet light detection area. The following is a related explanation. Figure 3 , Figure 5 Taking a display panel 340 with a light sensor (such as a first light sensor 301) as an example, this application provides an embodiment of a display module 20. The light conversion principle of the display module 20 is explained below using visible light and ultraviolet light as examples. The conversion principle of the display module 20 for other wavelengths of light (such as infrared light) can be referred to the conversion principle of the display module 20 for visible light.

[0086] Light from the outside (e.g., visible light and ultraviolet light; in this application, visible light is indicated by a white arrow, and ultraviolet light may be indicated by a black arrow) passes through the cover plate 310 and can then enter the ultraviolet filter layer 361. The ultraviolet filter layer 361 can be a type of ultraviolet filter structure. The ultraviolet filter layer 361 can be used to transmit ultraviolet light and absorb or reflect light of other wavelengths (such as visible light). For example, the ultraviolet filter layer 361 can be used to allow at least a portion of light with wavelengths of 200–400 nm to pass through the ultraviolet filter layer 361, and absorb or reflect at least most of the light with wavelengths of 400–1000 nm. Embodiments of this application may not limit the specific wavelength of ultraviolet light that the ultraviolet filter layer 361 can transmit. Embodiments of this application may not limit the specific wavelengths of light other than ultraviolet light that the ultraviolet filter layer 361 can absorb or reflect.

[0087] At least most of the light emitted from the ultraviolet filter layer 361 is ultraviolet light. The light emitted from the ultraviolet filter layer 361 can enter the ultraviolet light conversion layer 362. The ultraviolet light conversion layer 362 can be used to convert the ultraviolet light from the ultraviolet filter layer 361 into visible light.

[0088] The ultraviolet light conversion layer 362 can be, for example, an ink. The ultraviolet light conversion layer 362 can be made of organic or inorganic fluorescent materials, such as yttrium aluminum garnet (YAG) powder, β-Sailon phosphor, etc.

[0089] Visible light emitted from the ultraviolet light conversion layer 362 can pass through the polarizer 330 and the front panel 341 of the display panel 340 and enter the first light sensor 301.

[0090] Figure 6 A schematic structural diagram of another ultraviolet light detection region is shown. (Compared to...) Figure 5 The structures of the ultraviolet light detection regions shown are different. Figure 6 The first light sensor 301 shown may not be encapsulated in the display panel 340. The first light sensor 301 and the light-emitting unit 343 may be respectively disposed on both sides of the back plate 342 of the display panel 340. For example, the first light sensor 301 may be disposed in a through hole in the light-absorbing layer.

[0091] Since a driving circuit for powering the light-emitting unit 343 is provided on the side of the back plate 342 facing the front plate 341 of the display panel 340, the first light sensor 301 is provided on the side of the back plate 342 away from the front plate 341, which helps to reduce the wiring complexity of the driving circuit for driving the first light sensor 301.

[0092] Figure 7 It shows Figure 3 , Figure 4Another schematic diagram of the ultraviolet light detection area is shown below. (See below for further details.) Figure 3 , Figure 4 and Figure 7 Taking a display panel 340 including two light sensors (a first light sensor 301 and a second light sensor 302) as an example, an embodiment of a display module 20 provided in this application is described. The arrangement of the second light sensor 302 in the electronic device 100 can refer to that of the first light sensor 301.

[0093] Depending on the number of light sensors 30, the ultraviolet light detection area of ​​the display module 20 can be divided into multiple regions, each corresponding to one of the light sensors 30. Each light sensor 30 can detect the light intensity incident on its corresponding region. The ultraviolet light detection area can include a first region and a second region. The first region can also be called the main ultraviolet light detection region. The second region can serve as a reference region for the first region. A first light sensor 301 can be configured corresponding to the first region to detect the light intensity incident on it. A second light sensor 302 can be configured corresponding to the second region to detect the light intensity incident on it.

[0094] The ultraviolet filter layer 361 can be distributed in the first and second regions of the ultraviolet light detection area. The ultraviolet conversion layer 362 can be disposed in the first region of the ultraviolet light detection area, but not distributed in the second region of the ultraviolet light detection area. The first and second regions of the ultraviolet light detection area can be defined according to the position of the ultraviolet conversion layer 362 in the ultraviolet light detection area.

[0095] The first portion of light incident from the outside can illuminate a first region of the ultraviolet light detection area. This first portion of light can include visible light and ultraviolet light. In some embodiments of this application, the first portion of light may also include light of other wavelengths, such as infrared light. The light conversion principle of the display module 20 is explained below using visible light and ultraviolet light as examples of the first portion of light. The conversion principle of the display module 20 for other wavelengths of light (such as infrared light) in the first portion of light can be referred to the conversion principle of the display module 20 for visible light in the first portion of light.

[0096] Visible and ultraviolet light from the first portion of the light can illuminate the first portion of the ultraviolet filter layer 361. The first portion of the ultraviolet filter layer 361 can correspond to the first region of the ultraviolet light detection region. At least a portion (e.g., more than 20%) of the ultraviolet light from the first portion of the light can pass through the first portion of the ultraviolet filter layer 361. Most of the visible light from the first portion of the light can be absorbed or reflected by the first portion of the ultraviolet filter layer 361. A small amount (e.g., less than 5%) of the visible light from the first portion of the light can pass through the first portion of the ultraviolet filter layer 361. The proportion of visible light transmitted through the first portion of the ultraviolet filter layer 361 can be less than the proportion of ultraviolet light transmitted through the ultraviolet filter layer 361. Therefore, the light emanating from the first portion of the ultraviolet filter layer 361 can include both ultraviolet and visible light. The light emitted from the first portion of the ultraviolet filter layer 361 can be predominantly ultraviolet light.

[0097] The first portion of the ultraviolet filter layer 361 is used to emit light filtered by the first portion of the ultraviolet filter layer 361 into the ultraviolet light conversion layer 362. That is, both ultraviolet and visible light emitted from the first portion of the ultraviolet filter layer 361 can enter the ultraviolet light conversion layer 362. The ultraviolet light conversion layer 362 can convert the ultraviolet light from the first portion of the ultraviolet filter layer 361 into visible light. Visible light from the first portion of the ultraviolet filter layer 361 can pass through the ultraviolet light conversion layer 362. The light emanating from the ultraviolet light conversion layer 362 can include the visible light converted from ultraviolet light, as well as the visible light that enters and passes through the ultraviolet light conversion layer 362.

[0098] The first light sensor 301 can be disposed opposite to the first portion of the ultraviolet filter layer 361. Visible light emitted from the ultraviolet light conversion layer 362 can pass through the polarizer 330 and enter the first light sensor 301. The first portion of visible light detected by the first light sensor 301 corresponds to the ultraviolet light transmitted through the first portion of the ultraviolet filter layer 361, and the second portion of visible light detected by the first light sensor 301 corresponds to the visible light transmitted through the first portion of the ultraviolet filter layer 361.

[0099] The second portion of light incident from the outside can illuminate a second region of the ultraviolet light detection area. This second portion of light can include both visible and ultraviolet light. In some embodiments of this application, the second portion of light may also include light of other wavelengths, such as infrared light. The light conversion principle of the display module 20 is explained below using visible and ultraviolet light as examples of the second portion of light. The conversion principle of the display module 20 for other wavelengths of light (such as infrared light) in the second portion of light can be referred to the conversion principle of the display module 20 for visible light in the second portion of light.

[0100] The visible and ultraviolet light of the second portion of the light can illuminate the second portion of the ultraviolet filter layer 361. The second portion of the ultraviolet filter layer 361 can correspond to the second region of the ultraviolet light detection region. At least a portion of the ultraviolet light of the second portion of the light can pass through the second portion of the ultraviolet filter layer 361. Most of the visible light of the second portion of the light can be absorbed or reflected by the second portion of the ultraviolet filter layer 361. A small amount of the visible light of the second portion of the light can pass through the second portion of the ultraviolet filter layer 361. The proportion of visible light transmitted through the second portion of the ultraviolet filter layer 361 can be less than the proportion of ultraviolet light transmitted through the second portion of the ultraviolet filter layer 361. Therefore, the light emanating from the second portion of the ultraviolet filter layer 361 can include both ultraviolet and visible light.

[0101] The orthographic projection of the ultraviolet light conversion layer 362 onto the ultraviolet filter layer 361 can be located outside the second portion of the ultraviolet filter layer 361. That is, the ultraviolet light conversion layer 362 may not be present in the second region of the ultraviolet light detection area. Therefore, ultraviolet and visible light from the second portion of the ultraviolet filter layer 361 can enter the polarizer 330. The polarizer 330 can absorb ultraviolet light and transmit visible light. The second photosensitive sensor 302 can be positioned opposite the second portion of the ultraviolet filter layer 361. In the second region of the ultraviolet light detection area, visible light emitted from the polarizer 330 can enter the second photosensitive sensor 302. The visible light detected by the second photosensitive sensor 302 corresponds to the visible light transmitted through the second portion of the ultraviolet filter layer 361.

[0102] The first light sensor 301 detects visible light transmitted through the first portion of the ultraviolet filter layer 361, which may cause an error in the ultraviolet light intensity detected by the first light sensor 301. In other words, the first light sensor 301 detects not only external ultraviolet light but also a small amount of external visible light, resulting in a relatively high detected ultraviolet light intensity. Since the second light sensor 302 can detect visible light transmitted through the second portion of the ultraviolet filter layer 361, combining the detection results of the first light sensor 301 and the second light sensor 302 to output the ultraviolet light intensity helps reduce the detection error of the ultraviolet light intensity.

[0103] Assume the current output by the first optical sensor 301 is I1, I1 = I 1,UV +I 1,VL I 1,UV This corresponds to the ultraviolet light transmitted through the first part of the ultraviolet filter layer 361. 1,VL This corresponds to the visible light transmitted through the first part of the ultraviolet filter layer 361. Assume the current output by the second photosensor 302 is I2, where I2 = I... 2,VL I 2,VL This corresponds to the visible light transmitted through the second part of the ultraviolet filter layer 361. Combined with I 1,VL with I2,VL The inferred intensity of external ultraviolet light can be more easily correlated with the actual intensity of ultraviolet light.

[0104] The current I1 output by the first optical sensor 301 can be related to the ultraviolet light transmittance T of the ultraviolet filter layer 361. UV The conversion efficiency η of the ultraviolet light conversion layer 362 UV Visible light transmittance T of polarizer 330 POL The photoelectric conversion efficiency E1 of the first optical sensor 301 is related to the photoelectric conversion efficiency of the second optical sensor 302. The current I2 output by the second optical sensor 302 can be related to the ultraviolet light transmittance T of the ultraviolet filter layer 361. UV Visible light transmittance T of polarizer 330 POL It is related to the photoelectric conversion efficiency E2 of the first optical sensor 301, etc.

[0105] Assume the intensity of the ultraviolet light incident on the portion of the ultraviolet filter layer 361 corresponding to the first photosensor 301 is L. 0,UV .

[0106] The light intensity output of the portion corresponding to the first photosensor 301 of the ultraviolet filter layer 361 is L1, where L1 = L 1,UV +L 1,VL L 1,UV =L 0,UV ·T UV L 1,UV L represents the intensity of ultraviolet light output from the first photosensor 301 corresponding to the ultraviolet filter layer 361. 1,VL Let L be the visible light intensity output from the first photosensor 301 corresponding to the ultraviolet filter layer 361. Then, the light intensity output from the ultraviolet conversion layer 362 is L2, where L2 = L... 1,UV ·η UV +L 1,VL The light intensity output from the polarizer 330 corresponding to the first optical sensor 301 is L3, where L3 = (L 1,UV ·η UV +L 1,VL )·T POL The current output by the first optical sensor 301 is I1, I1 = L3·E1 = (L 1,UV ·η UV +L 1,VL )·T POL ·E1.

[0107] The light intensity L4 = L of the portion of the output light from the ultraviolet filter layer 361 corresponding to the second photosensor 302 2,UV +L 2,VL L 2,UV =L 0,UV ·T UV L 2,UVL represents the ultraviolet light intensity output from the second photosensor 302 corresponding to the ultraviolet filter layer 361. 2,VL This represents the visible light intensity of the portion of the output from the ultraviolet filter layer 361 corresponding to the second photosensor 302. The polarizer 330 can absorb ultraviolet light; therefore, the light intensity of the portion of the output from the polarizer 330 corresponding to the second photosensor 302 is L5, where L5 = L... 2,VL ·T POL The current I2 = L output by the second optical sensor 302 2,VL ·T POL ·E2.

[0108] Assume L 1,VL With L 2,VL If the values ​​are the same, and E1 and E2 are the same, then I1 - I2 = L 0,UV ·T UV ·η UV ·T POL ·E1. Therefore, L 0,UV =(I1-I2) / (T) UV ·η UV ·T POL ·E1).

[0109] If we also consider the visible light transmittance T of the ultraviolet conversion layer VL Then L2 = L 1,UV ·η UV +L 1,VL ·T VL L3 = (L 1,UV ·η UV +L 1,VL ·T VL )·T POL , I1=(L 1,UV ·η UV +L 1,VL ·T VL )·T POL E1. Assume L 1,VL With L 2,VL If they are the same, and E1 and E2 are the same, then I1-T VL ·I2=L 0,UV ·T UV ·η UV ·T POL ·E1. Therefore, L 0,UV =(I1-T) VL ·I2) / (T UV ·η UV ·T POL ·E1).

[0110] Through a series of settings, the visible light transmitted through the ultraviolet filter layer 361 detected by the first light sensor 301 can be made as similar as possible to the visible light transmitted through the ultraviolet filter layer 361 detected by the second light sensor 302. For example, half of the ultraviolet filter layer 361 is attached to the ultraviolet light conversion layer 362, and the other half is located outside the ultraviolet light conversion layer 362 (that is, the part of the ultraviolet filter layer 361 attached to the ultraviolet light conversion layer 362 is part 1, and the part of the ultraviolet filter layer 361 located outside the ultraviolet light conversion layer 362 is part 2, and the orthographic projection size of part 1 on the polarizer 330 is the same as the orthographic projection size of part 2 on the polarizer 330). Furthermore, the photosensitivity parameters of the first light sensor 301 are the same as those of the second light sensor 302.

[0111] The ultraviolet filter layer 361 can also be implemented by multiple ultraviolet filters. For example, the first light sensor 301 and the first ultraviolet filter can be arranged opposite each other, and the second light sensor 302 and the second ultraviolet filter can be arranged opposite each other. The first ultraviolet filter and the second ultraviolet filter can be the same in terms of size parameters, filtering parameters, etc. The ultraviolet light emitted by the second ultraviolet filter can avoid passing through the ultraviolet light conversion layer 362 as much as possible.

[0112] Figure 8 A schematic structural diagram of another ultraviolet light detection region is shown. (Compared to...) Figure 7 The structures of the ultraviolet light detection regions shown are different. Figure 8 The first light sensor 301 and the second light sensor 302 shown may not be encapsulated in the display panel 340. The first light sensor 301 and the light-emitting unit 343 may be respectively disposed on both sides of the back plate 342 of the display panel 340, and the second light sensor 302 and the light-emitting unit 343 may also be respectively disposed on both sides of the back plate 342 of the display panel 340. The first light sensor 301 and the second light sensor 302 may, for example, be disposed within a through-hole in the light-absorbing layer.

[0113] Since a driving circuit for powering the light-emitting unit 343 is provided on the side of the back plate 342 facing the front plate 341 of the display panel 340, and the first light sensor 301 and the second light sensor 302 are provided on the side of the back plate 342 away from the front plate 341, it is beneficial to reduce the wiring complexity of the driving circuit for driving the first light sensor 301 and the second light sensor 302.

[0114] Even when no light is shining on the light sensor 30, a current can flow through it. This current can also be called dark current. Figure 9 As shown, the magnitude of the dark current flowing through the light sensor 30 can be related to the temperature of the light sensor 30. Figure 5 , Figure 6In the illustrated embodiment, a light sensor, namely a first light sensor 301, may be provided in the ultraviolet light detection area. The current conducted by the first light sensor 301 may include dark current and effective current generated due to the detection of ultraviolet light. The presence of dark current may affect the detection accuracy of the first light sensor 301.

[0115] exist Figure 7 , Figure 8 In the illustrated embodiment, the ultraviolet light detection area can be equipped with two photosensitive sensors, namely a first photosensitive sensor 301 and a second photosensitive sensor 302. The current flowing through the first photosensitive sensor 301 and the current flowing through the second photosensitive sensor 302 can both include dark current. Therefore, providing two photosensitive sensors within the display module 20 also helps to reduce the impact of dark current on the accuracy of ultraviolet light detection.

[0116] In some embodiments, the ultraviolet light conversion layer 362 can convert ultraviolet light into specific colors, such as blue, green, or red light. This is to reduce the impact of other light sources on the light sensor 30 (e.g., ...). Figures 5 to 8 The first light sensor 301 is affected by the detection result, and the light sensor 30 can detect light of a specific color. The wavelength of the light detected by the light sensor 30 matches the wavelength of the light converted by the ultraviolet light conversion layer 362. For example, the wavelength range of the light detected by the light sensor 30 and the wavelength range of the light converted by the ultraviolet light conversion layer 362 have overlapping portions.

[0117] In other embodiments, the ultraviolet light conversion layer 362 can convert ultraviolet light of different wavelengths into visible light of multiple wavelengths. For example, it can convert UVC with wavelengths of 200–280 nm into visible light of wavelength -1, UVB with wavelengths of 280–315 nm into visible light of wavelength -2, and UVA with wavelengths of 315–400 nm into visible light of wavelength -3. Wavelengths -1, -2, and -3 can be different from each other. For example, wavelengths -1, -2, and -3 can correspond to red light, blue light, and green light, respectively. Accordingly, light sensors 30-1, 30-2, and 30-3 can be provided in the electronic device 100, wherein light sensor 30-1 can be used to detect light of wavelength -1, light sensor 30-2 can be used to detect light of wavelength -2, and light sensor 30-3 can be used to detect light of wavelength -3. Thus, the electronic device 100 can have the ability to detect multiple types of ultraviolet light. In some embodiments of this application, light sensor 30-1, light sensor 30-2, and light sensor 30-3 may also be replaced by photosensitive unit-1, photosensitive unit-2, and photosensitive unit-3 of light sensor 30.

[0118] In some embodiments of this application, in order for the ultraviolet light conversion layer 362 to convert ultraviolet light of different wavelengths into visible light of multiple wavelengths, the ultraviolet light conversion layer 362 may include multiple ultraviolet light conversion elements. Each ultraviolet light conversion element may, for example, be used to convert ultraviolet light of a corresponding wavelength into visible light of a corresponding wavelength. The ultraviolet light wavelengths corresponding to the multiple ultraviolet light conversion elements may be different, and the visible light wavelengths corresponding to the multiple ultraviolet light conversion elements may be different.

[0119] Since different types of ultraviolet light have different effects on the human body, detecting multiple types of ultraviolet light can help electronic devices 100 provide users with appropriate sun protection strategies based on the type of ultraviolet light in the environment.

[0120] The following is combined Figures 5 to 8 The embodiments shown illustrate several ultraviolet filter layers 361 provided in this application. The filtering principle of the ultraviolet filter layer 361 is explained below by describing the transformation modes of visible and ultraviolet light passing through it. The transformation mode of infrared light passing through the ultraviolet filter layer 361 can be referenced to the transformation mode of visible light passing through it.

[0121] In some embodiments, the ultraviolet filter layer 361 can be a black ultraviolet filter ink. The ultraviolet filter ink may include materials such as inorganic metal particles, carbon black, and resin. The filtering performance of the ultraviolet filter ink can be referenced... Figure 10 The example shown. In Figure 10 In the illustrated embodiment, this black ultraviolet filter ink can absorb most visible light (e.g., absorption wavelengths greater than 500 nm). The ultraviolet transmittance / visible transmittance ratio can, for example, be greater than 10. The ultraviolet filter ink can be obtained, for example, by spraying, printing, or other methods.

[0122] Combination Figure 10 In certain scenarios, ultraviolet (UV) filter inks may allow a small portion of visible light to pass through. For example, a small portion of visible light with wavelengths between 400 and 500 nm may pass through the UV filter ink. Since the intensity of visible light incident on the cover plate 310 is typically significantly greater than the intensity of UV light incident on the cover plate 310, even if only a small portion of visible light passes through the UV filter layer 361, it can easily affect the accuracy of UV light detection. The more visible light that passes through the UV filter layer 361, the less accurate the UV light detection results may be.

[0123] In other embodiments, the ultraviolet filter layer 361 can also be a silver nanofilm. The silver nanofilm can be a material primarily composed of silver at the nanoscale. The filtering performance of the silver nanofilm can be described with reference to... Figure 11 The example shown. In Figure 11In the illustrated embodiment, this silver nanofilm can absorb most visible light (e.g., light with wavelengths greater than 350–400 nm or light with wavelengths less than 250 nm). The ultraviolet transmittance / visible transmittance can, for example, be greater than 10. The silver nanofilm can be obtained, for example, by spraying, printing, or other methods.

[0124] Due to its inherent color, the silver nanofilm is reflective. Light from the outside world may be reflected by the silver nanofilm and enter the user's eyes. This not only makes the silver nanofilm visible from the outside of the electronic device 100, but also easily interferes with the user's normal viewing of the display area of ​​the display module 20. When the ambient light intensity is strong, the silver nanofilm can reflect relatively strong light, which may damage the user's eyes.

[0125] In yet other embodiments, the ultraviolet filter layer 361 may be composed of... Figure 10 The UV filter ink shown and Figure 11 The silver nanofilm shown is obtained by stacking. Figure 12 The filtering principle of the ultraviolet filter layer 361 is shown.

[0126] External light can pass through the UV filter ink and then enter the silver nanofilm. The silver nanofilm can be located on the side of the UV filter ink closer to the polarizer 330. External UV light (e.g., a portion of UVC with wavelengths of 200–280 nm, a portion of UVB with wavelengths of 280–315 nm, and a portion of UVA with wavelengths of 315–400 nm) can pass through the UV filter ink. A small portion of visible light (e.g., a portion of visible light with wavelengths of 400–500 nm) can pass through the UV filter ink. Other light entering the UV filter ink (e.g., most visible and infrared light) can be absorbed by the UV filter ink.

[0127] The light incident on the silver nanofilm can include ultraviolet light from the ultraviolet filter ink and a small portion of visible light. Since the silver nanofilm can absorb or reflect visible light with wavelengths greater than 400 nm, the light transmitted through the silver nanofilm is almost entirely ultraviolet light. The silver nanofilm can absorb or reflect a small portion of visible light from the ultraviolet filter ink. The visible light reflected by the silver nanofilm can enter the ultraviolet filter ink and be absorbed by it.

[0128] Figure 13 The filtering performance of UV filter layer 361, obtained by stacking UV filter ink and silver nanofilm, is shown. Figure 13 In the illustrated embodiment, this ultraviolet filter layer 361 can absorb or filter out most visible light (e.g., absorb light with wavelengths greater than 350–400 nm), making the ultraviolet light passing through the ultraviolet filter layer 361 purer. For example, the ratio of ultraviolet light transmittance to visible light transmittance can be greater than 40.

[0129] In the embodiments described above, the ultraviolet filter layer 361 can be obtained by spraying, printing or other methods, so the processing difficulty of the ultraviolet filter layer 361 is relatively small.

[0130] In some embodiments, the cover plate 310 may have a function similar to that of the ultraviolet filter layer 361. For example, the cover plate 310 may be optical glass with ultraviolet filtering function. By depositing multiple layers of inorganic materials with different refractive indices into the glass, the cover plate 310 can have ultraviolet filtering function. Thus, the cover plate 310 can be an ultraviolet filtering structure. In one possible scenario, the ultraviolet filter layer 361 may be omitted from the display module 20. For example, the ultraviolet light conversion layer 362 may be directly disposed on the cover plate 310. In another possible scenario, the cover plate 310 with ultraviolet filtering function may be used in combination with the ultraviolet filter layer 361 in the aforementioned embodiments to make the ultraviolet light incident on the ultraviolet light conversion layer 362 purer.

[0131] Figure 14 This is a software architecture diagram of an electronic device 100 provided in an embodiment of this application.

[0132] In conjunction with the embodiments described above, ambient light can illuminate the ultraviolet light detection area of ​​the electronic device 100. The electronic device 100 can determine the intensity of ultraviolet light in the ambient light through the light sensor 30. Specifically, the electronic device 100 can convert the current signal flowing through the light sensor 30 into a digital signal using an analog-to-digital converter to obtain the current value flowing through the light sensor 30. The electronic device 100 can determine the light intensity illuminating the light sensor 30 using an ultraviolet index module, thus obtaining the illuminance (Lx) value, and determine the ultraviolet (UV) index based on the illuminance value.

[0133] For example, the UV index at night can be 0. A UV index of 1-2 indicates cloudy or rainy weather with very weak UV intensity. A UV index of 3-4 indicates partly cloudy weather with relatively weak UV intensity. A UV index of 5-6 indicates slightly cloudy weather with relatively strong UV intensity. A UV index of 7-9 indicates sunny and cloudless weather with very strong UV intensity. A UV index of 10 or higher indicates extremely sunny weather (such as a sunny summer day) with exceptionally strong UV intensity.

[0134] According to the solution provided in the embodiments of this application, the relationship between the illuminance obtained by the light sensor 30 and the intensity of external ultraviolet light can be obtained. Figure 15The schematic diagram shown illustrates that the illuminance Lx value obtained by the light sensor 30 in this embodiment of the application can be linearly related to the intensity of external ultraviolet light, meaning that the solution provided in this embodiment of the application can relatively accurately infer the intensity of external ultraviolet light and obtain a relatively accurate ultraviolet index.

[0135] The electronic device 100 can also use a sun protection strategy module to suggest appropriate sun protection strategies to the user based on the obtained ultraviolet radiation level.

[0136] In some embodiments, the electronic device 100 can indicate the current UV index via a user interface. In other embodiments, the electronic device 100 can also display suggested sun protection strategies on the user interface for the current UV index. This helps reduce the harm of high-intensity ultraviolet radiation to the user.

[0137] In one possible scenario, electronic device 100 can automatically display information related to the UV index. For example, in response to a user's wake-up operation, electronic device 100 can be woken up and a main interface can be displayed on the user interface. The main interface may include controls for multiple applications. For example, the main interface may include a weather control that can display information related to the UV index.

[0138] In another possible scenario, the electronic device 100 can be triggered by a user to display information related to the UV index. The electronic device 100 can display controls related to the UV index in the application. The electronic device 100 can respond to user actions on the controls of the application, launching the application's interface to display the information related to the UV index.

[0139] like Figure 16 As shown, the electronic device 100 can display an accurate UV index. Figure 16 In the illustrated embodiment, the current UV indicator is 2.7, and recommended protective measures may include, for example, applying sunscreen with a sun protection factor (SPF) of 30+, wearing a sun hat, and wearing sun-protective clothing.

[0140] like Figure 17 As shown, the electronic device 100 can also roughly indicate the UV index using a UV control and a UV indicator bar. For example, the first end of the UV indicator bar can correspond to a low UV index, and the second end of the UV indicator bar can correspond to a high UV index. The UV control is located at a certain position on the UV indicator bar. The distance of the UV control relative to the two ends of the UV indicator bar reflects the UV index. The closer the UV control is to the first end of the UV indicator bar, the lower the current UV index; the closer the UV control is to the second end of the UV indicator bar, the higher the current UV index.

[0141] against Figure 17 The UV index shown suggests protective measures such as applying sunscreen with SPF 30+, wearing sunglasses, a sun hat, wearing sun-protective clothing, and staying in the shade as much as possible.

[0142] In other embodiments, the electronic device 100 can indicate the historical UV index via a user interface.

[0143] like Figure 17 As shown, the electronic device 100 can record the UV index at multiple times and display the UV index at multiple times on the user interface. Figure 17 In the illustrated embodiment, the UV index can be highest at 14:00 and lowest at 6:00. The UV index can gradually increase between 6:00 and 14:00, and gradually decrease between 14:00 and 18:00.

[0144] Historical UV index can also be used to indicate the duration of outdoor activities to users.

[0145] exist Figure 17 In the illustrated embodiment, the UV indicator can be relatively low between 6:00 and 10:00 and between 16:00 and 18:00; and relatively high between 10:00 and 16:00. Therefore, it can be inferred that the user's outdoor activity time can be greater than 6 hours.

[0146] Electronic device 100 can also provide guidance or suggestions based on the duration of outdoor activities.

[0147] exist Figure 17 The user interface shown displays instructions for outdoor activities. Figure 17 In the illustrated embodiment, the user's outdoor activity time is relatively long. If the user has taken protective measures according to sun protection guidelines, the user's UV damage can be relatively small. The electronic device can advise the user to determine whether to continue the outdoor activity based on their own situation. If the user has not taken protective measures according to sun protection guidelines, the user's UV damage can be relatively large. The electronic device can advise the user to end the outdoor activity as soon as possible.

[0148] The solution provided in this application enables electronic devices or display modules to detect the intensity of external ultraviolet light relatively accurately and to provide users with appropriate ultraviolet light prevention strategies.

[0149] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display module, characterized by The display module comprises a display panel, a first light sensor, a second light sensor, a front plate, a back plate, and a polarizer. The display panel comprises a light emitting unit, a first light sensor, a second light sensor, a front plate, and a back plate. The display module further comprises a light shielding layer, which surrounds the outer periphery of the ultraviolet light filtering structure. The ultraviolet light filtering structure comprises a first portion and a second portion. The light emitting unit is configured to emit light through the polarizer. The ultraviolet light filtering structure is configured to receive light incident on the display module and emit ultraviolet light filtered by the ultraviolet light filtering structure. The ultraviolet light conversion layer is configured to convert ultraviolet light from the ultraviolet light filtering structure into visible light or infrared light. The first light sensor and the second light sensor are configured to detect the intensity of light from the polarizer.

2. The display module of claim 1, wherein, The current flowing through the first light sensor is I1, the current flowing through the second light sensor is I2, and the light intensity L of the external ultraviolet light 0,UV satisfies: L 0,UV = (I1 - k1 · I2) / k2, wherein k1 is 1 or T VL , T VL is the visible or infrared light transmittance of the ultraviolet light conversion layer; k2 is obtained from one or more of: the ultraviolet light transmittance T of the ultraviolet filter structure UV the conversion efficiency η of the ultraviolet light conversion layer UV the visible light or infrared light transmittance T of the polarizing sheet POL the photoelectric conversion efficiency E1 of the first light sensor 3. The display module of claim 1 or 2, wherein, The ultraviolet light filtering structure comprises an ultraviolet light filtering ink and a silver nanometer film.

4. The display module of claim 3, wherein, The silver nanometer film is located on the side of the ultraviolet light filtering ink closer to the polarizer.

5. The display module of any one of claims 1, 2, or 4, wherein, The ultraviolet light conversion layer is configured to convert ultraviolet light of a first wavelength from the ultraviolet light filtering structure into visible light or infrared light of a second wavelength.

6. The display module of claim 5, wherein, The display module further comprises a third light sensor.

7. The display module of any one of claims 1, 2, 4, or 6, wherein, The ultraviolet light conversion layer is configured to convert ultraviolet light of a third wavelength from the ultraviolet light filtering structure into visible light or infrared light of a fourth wavelength.

8. The display module of any one of claims 1, 2, 4, or 6, wherein, The display module further comprises a cover plate.

9. The display module of any one of claims 1, 2, 4, or 6, wherein, The ultraviolet light conversion layer is attached to the ultraviolet light filtering structure.

10. An electronic device, comprising: The display module further comprises a display panel. The display module comprises a display panel, a first light sensor, a second light sensor, a front plate, a back plate, and a polarizer. The display module comprises a display panel, a first light sensor, a second light sensor, a front plate, a back plate, and a polarizer.

Images