Screen and electronic equipment

Abstract

The utility model provides a screen and electronic equipment, the screen comprises a display panel and a driving chip, and the driving chip is used for controlling the display panel; at least one photoelectric detector is further arranged in the display panel, electrically connected with the driving chip and used for detecting the ultraviolet intensity of the external environment. The photoelectric detector is arranged in the display panel and used for detecting the ultraviolet intensity in the external environment, so that the screen has a display function and an ultraviolet detection function. Besides, the ultraviolet detection device does not occupy the space outside the screen, interference with other parts in the electronic equipment is avoided, the overall size of the electronic equipment can be reduced, the portability is improved, and the cost is reduced. Meanwhile, the photoelectric detector is arranged in the display panel, so that the ultraviolet receiving range of the photoelectric detector can be enlarged when the ultraviolet intensity of the external environment is detected, and the accuracy of the ultraviolet intensity detection function is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a screen and electronic equipment. Background Art

[0002] With the advancement of technology, mobile phones and other electronic devices have more and more functions to meet the needs of users. At present, the screens of electronic devices are only used for display and do not have other functions, which makes the screens and electronic devices single-function and unable to meet the diverse needs of users. Utility Model Content

[0003] In view of this, the embodiments of the present application provide a screen and an electronic device, which increase the functions of the screen and the electronic device and improve the user experience.

[0004] In a first aspect, an embodiment of the present application provides a screen, which includes a display panel and a driver chip, wherein the driver chip is used to control the display panel; at least one photodetector is also provided in the display panel, and the photodetector is electrically connected to the driver chip, and the photodetector is used to detect the ultraviolet intensity of the external environment.

[0005] In this embodiment, by providing a photodetector within the display panel to detect the intensity of ultraviolet rays in the external environment, the screen has both a display function and an ultraviolet detection function. Furthermore, when the ultraviolet detection device is built into the display panel, it does not occupy space outside the screen, preventing interference with other components of the electronic device. This can also reduce the overall size of the electronic device, improving portability and reducing costs. Furthermore, the photodetector's placement within the display panel increases the range within which the photodetector can receive ultraviolet rays when detecting the intensity of ultraviolet rays in the external environment, improving the accuracy of the ultraviolet intensity detection function without requiring a through-hole in the screen.

[0006] In a specific embodiment, the photodetector is a PIN-type photodetector.

[0007] In this embodiment, the PIN-type photodetector includes a P-type semiconductor, an intrinsic semiconductor, and an N-type semiconductor stacked in sequence. When the photodetector receives ultraviolet radiation from the external environment, the photodetector can absorb the ultraviolet radiation and generate current. In addition, a layer of intrinsic semiconductor with a very low concentration is doped between the P-type semiconductor and the N-type semiconductor, which can increase the width of the depletion region, thereby reducing the influence of diffusion movement and increasing the corresponding speed during photoelectric conversion, thereby improving the detection efficiency when detecting the ultraviolet intensity in the external environment.

[0008] In a specific embodiment, the display panel includes a cathode, an electron transport layer, an organic light-emitting layer, a hole transport layer, an anode and a substrate stacked in sequence, and the photodetector is arranged on the substrate; the driving chip is located on the outside of the display panel, and the driving chip is electrically connected to the photodetector through a circuit.

[0009] In this embodiment, the photodetector can be disposed on the display panel substrate, facilitating installation of the photodetector circuit. The photodetector can be positioned anywhere on the substrate, as long as it does not interfere with other components. Two or more photodetectors can be provided to increase the photodetector's UV reception range and further enhance UV detection accuracy.

[0010] In a specific embodiment, the organic light-emitting layer includes a first pixel and a second pixel, the first pixel includes a first sub-pixel, a second sub-pixel and a third sub-pixel, the first sub-pixel can emit red light, the second sub-pixel can emit green light, and the third sub-pixel can emit blue light; the second pixel can emit ultraviolet light.

[0011] In this embodiment, the organic light-emitting layer includes a second pixel capable of emitting ultraviolet light. This allows the screen to emit ultraviolet light when in operation, eliminating the need for through-holes in the screen. This increases the angle of ultraviolet light emission, meeting a wider range of usage environments and requirements. Furthermore, since the ultraviolet light is emitted from the screen itself, it prevents damage to other screen components caused by prolonged exposure to ultraviolet light during use, thereby extending the lifespan of the electronic device. Furthermore, since the screen itself can emit ultraviolet light through the second pixel, eliminating the need for a separate ultraviolet light emitting device within the electronic device, it can reduce the overall size and power consumption of the electronic device, thereby lowering its cost.

[0012] In a specific embodiment, the second pixel is disposed in a gap between adjacent first pixels.

[0013] In this embodiment, second pixels are positioned in the gaps between adjacent first pixels, integrating them into the display area of ​​the screen. This prevents the screen from being affected while also increasing the non-display area. Furthermore, positioning second pixels in the gaps between adjacent first pixels increases the number of second pixels and the area they occupy, thereby enhancing the intensity and range of the ultraviolet light emitted by the second pixels.

[0014] In a specific embodiment, the second pixels are evenly distributed.

[0015] In this embodiment, the plurality of second pixels may be evenly distributed, thereby improving the uniformity of the display panel in emitting ultraviolet rays and improving the overall consistency of the display panel.

[0016] In a specific embodiment, the screen also includes a first driving circuit and a second driving circuit, the driving chip is electrically connected to the first driving circuit and the second driving circuit, the driving chip controls the first pixel to emit light or stop emitting light through the first driving circuit, and the driving chip controls the second pixel to emit light or stop emitting light through the second driving circuit.

[0017] In this embodiment, the screen is further provided with multiple independent first drive circuits. The first drive circuit is used to connect the first pixel and the anode in the organic light-emitting layer, thereby controlling the first sub-pixel, the second sub-pixel, and the third sub-pixel of the first pixel to emit light or stop emitting light, thereby realizing the display function of the screen. The screen also includes a driver chip electrically connected to the first drive circuit in the display panel. The driver chip is used to input a control signal to the first drive circuit, thereby controlling the display function of the display panel through the first drive circuit. The screen is also provided with a second drive circuit, which enables the second drive circuit to independently control the second pixel to emit light or stop emitting light, allowing the user to turn the ultraviolet emission function on or off as needed. This improves user convenience and prevents the ultraviolet emission function from being always in an active state when the screen is turned on, thereby reducing power consumption. At the same time, the second drive circuit is electrically connected to the driver chip, and the driver chip can control the ultraviolet emission function to be turned on or off through the second drive circuit 121.

[0018] In a specific embodiment, the first driving circuit and the second driving circuit are 7T1C circuits.

[0019] In this embodiment, the first drive circuit is a 7T1C circuit, which ensures current stability during operation. The 7T1C circuit offers advantages such as high pixel consistency, low power consumption, and a high refresh rate, enhancing the screen's display quality. Furthermore, the second drive circuit is a 7T1C circuit, which ensures current stability during operation, enabling the screen to emit uniform and moderately intense ultraviolet light, improving the performance of the ultraviolet emission function.

[0020] In a specific embodiment, the second pixel can also emit purple light.

[0021] In this embodiment, when the second driving circuit controls the second pixel to emit light, the second pixel is able to emit ultraviolet light and purple light at the same time, so that the user can quickly distinguish whether the ultraviolet emission function is turned on with the naked eye, avoiding damage caused by long-term exposure to ultraviolet light to the user, and improving the safety of the electronic device 1. By adjusting the material composition of the second pixel in the organic light-emitting layer, the wavelength range of the emitted light can be adjusted. Therefore, by adjusting the material composition of the second pixel, the bandwidth of the excited state and the ground state is adjusted, so that in the process of transition from the excited state to the ground state, more energy can be released, so that it can emit light with a wavelength of 100-400nm. Since the wavelength range of visible light to the human eye is between 380-750nm, the second pixel can emit ultraviolet light while also emitting purple light visible to the human eye, thereby prompting the user whether the ultraviolet emission function is turned on, thereby improving the safety of the electronic device.

[0022] In a specific embodiment, the material of the organic light-emitting layer corresponding to the second pixel is a carbazole-containing, fluorene-containing, triphenylamine-containing, or pentylphenyl-containing organic compound.

[0023] In this embodiment, the material of the organic light-emitting layer corresponding to the second pixel is a carbazole-containing, fluorene-containing, triphenylamine-containing, or pentphenyl-containing organic compound, which has the advantages of being non-toxic and having high strength, causing no pollution to the environment, and being relatively strong.

[0024] In a second aspect, an embodiment of the present application provides an electronic device, comprising a housing and a screen, wherein the screen is disposed on the housing.

[0025] In a specific embodiment, the electronic device also includes a SOC chip, which is electrically connected to the driver chip. The driver chip can receive the electrical signal generated by the photodetector and transmit the electrical signal to the SOC chip. The SOC chip can control the display panel to display the detected ultraviolet intensity of the external environment through the driver chip.

[0026] In this embodiment, when the photodetector is exposed to ultraviolet rays, the photodetector can generate current, so that the driving chip electrically connected to the photodetector can receive the electrical signal of the current generated by the photodetector and transmit the electrical signal to the SOC chip. The SOC chip can convert the electrical signal into an ultraviolet intensity signal, and control the display area of ​​the display panel through the driving chip to display the ultraviolet intensity signal to the user, so that the user can know the ultraviolet detection results conveniently and intuitively. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an electronic device provided in this application in a specific embodiment;

[0028] Figure 2 This is a schematic structural diagram of a screen provided in this application in a specific embodiment;

[0029] Figure 3 for Figure 2 A structural entity diagram of a display panel in a specific embodiment is shown;

[0030] Figure 4 for Figure 2 A schematic structural diagram of an organic light-emitting layer in a specific embodiment;

[0031] Figure 5 for Figure 2 Schematic diagram of the structure of the photodetector and driver chip;

[0032] Figure 6 Schematic diagram of the structure of the photodetector;

[0033] Figure 7 for Figure 2 A schematic structural diagram of an organic light-emitting layer in another specific embodiment;

[0034] Figure 8 for Figure 2 Schematic diagram of the structure of the second driving circuit.

[0035] Description of reference numerals:

[0036] 1- Electronic equipment;

[0037] 11-Screen;

[0038] 111-cover plate;

[0039] 112- cathode;

[0040] 113-electron transport layer;

[0041] 114- organic light emitting layer;

[0042] 115-hole transport layer;

[0043] 116- anode;

[0044] 117-Substrate;

[0045] 118-first pixel;

[0046] 118a-first sub-pixel;

[0047] 118b-second sub-pixel;

[0048] 118c-third sub-pixel;

[0049] 119-second pixel;

[0050] 120-first driving circuit;

[0051] 121- second driving circuit;

[0052] 122-photodetector;

[0053] 122a-P type semiconductor;

[0054] 122b-intrinsic semiconductor;

[0055] 122c-N-type semiconductor;

[0056] 123-display panel;

[0057] 124-display area;

[0058] 125-driver chip;

[0059] 12- Shell.

[0060] The accompanying drawings are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0061] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0062] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that a component is connected to another component "upper" or "lower", it can not only be directly connected to the other component "upper" or "lower", but also indirectly connected to the other component "upper" or "lower" through an intermediate component.

[0064] like Figure 1 As shown, Figure 1This is a schematic diagram of the structure of the electronic device 1 provided in this application in a specific embodiment. The electronic device 1 includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a laptop computer, a car computer, a wearable device, and the like. The embodiment of this application does not impose any special restrictions on the specific form of the above-mentioned electronic device 1. For the convenience of explanation, the following description is based on the example of the electronic device 1 being a mobile phone. The electronic device 1 of this application is introduced below with a specific embodiment. Among them, the electronic device 1 includes a housing 12 and a screen 11 provided on the housing 12. The screen 11 can be adhered to the housing 12.

[0065] In some embodiments, the screen 11 may be an organic light-emitting diode (OLED). Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the screen 11 provided in this application in a specific embodiment. Along the thickness direction of the screen 11, the screen includes a display panel 123. Figure 3 , Figure 3 for Figure 2 The schematic diagram of the structure of the display panel 123 in a specific embodiment shows that the display panel 123 has a cover plate 111, a cathode 112, an electron transport layer 113, an organic light-emitting layer 114, a hole transport layer 115, an anode 116 and a substrate 117 stacked in sequence. When the electronic device is in use, the substrate 117 is on the side facing the user. When the screen 11 is working, under the action of an external electric field, electrons and holes migrate from the electron transport layer 113 and the hole transport layer 115 toward the organic light-emitting layer 114 respectively. After the electrons and holes are injected into the organic light-emitting layer 114, they combine to form excitons. The exciton radiation transition causes the emission of photons and releases energy, thereby realizing the luminescence of the organic light-emitting layer 114. Among them, as Figure 4 As shown, Figure 4 for Figure 3 The schematic diagram of the structure of the organic light-emitting layer 114 in a specific embodiment, the organic light-emitting layer 114 includes a plurality of first pixels 118 arranged at intervals, the first pixel 118 is composed of three sub-pixels, namely the first sub-pixel 118a, the second sub-pixel 118b and the third sub-pixel 118c, wherein the first sub-pixel 118a can emit red light, the second sub-pixel 118b can emit green light, and the third sub-pixel 118c can emit blue light. In addition, a plurality of independent first driving circuits 120 are provided in the screen 11, and the first driving circuit 120 is used to connect the first pixel 118 and the anode 116 in the organic light-emitting layer 114, so as to respectively control the first sub-pixel 118a, the second sub-pixel 118b and the third sub-pixel 118c of the first pixel 118 to emit light or stop emitting light, thereby realizing the display function of the screen 11. Figure 2As shown, the screen 11 also includes a driving chip 125 electrically connected to the first driving circuit 120 in the display panel 123. The driving chip 125 is used to input a control signal to the first driving circuit 120, thereby controlling the display function of the display panel 123 through the first driving circuit 120.

[0066] To meet user needs, electronic devices can be equipped with UV detection capabilities, achieved by installing a UV detection device within the electronic device. The UV detection device can be positioned between the screen and the housing of the electronic device, along the thickness of the screen. To ensure detection accuracy, a through-hole is provided in the screen so that the UV detection device, located at the bottom of the screen, can directly receive UV radiation from the external environment. However, conventional UV detection devices are relatively large, and directly integrating them into electronic devices would take up a significant amount of space, affecting the overall size and appearance of the electronic device. This could also result in signal transmission losses, impacting detection accuracy.

[0067] In order to solve the above technical problems, the embodiment of the present application provides a screen 11 and an electronic device 1 including the screen 11, such as Figure 3 and Figure 5 As shown, Figure 5 for Figure 2 Schematic diagram of the structure of the photodetector 122 and the driver chip 125. At least one photodetector 122 is further provided in the display panel 123. The photodetector 122 is electrically connected to the driver chip 125 for detecting the intensity of ultraviolet rays in the external environment.

[0068] In this embodiment, by disposing a photodetector 122 within the display panel 123 for detecting the intensity of ultraviolet rays in the external environment, the screen 11 is provided with an ultraviolet detection function in addition to its display function. Furthermore, when the ultraviolet detection device is built into the display panel 123, it does not occupy space outside the screen 11, thus avoiding interference with other components of the electronic device. This can also reduce the overall size of the electronic device, improve portability, and reduce costs. Furthermore, the placement of the photodetector 122 within the display panel 123 increases the range within which the photodetector 122 can receive ultraviolet rays when detecting the intensity of ultraviolet rays in the external environment, improving the accuracy of the ultraviolet intensity detection function without requiring a through hole in the screen 11.

[0069] like Figure 6 As shown, Figure 6 for Figure 5Figure 1 shows the structure of photodetector 122. In this embodiment, photodetector 122 may be a PIN-type photodetector, a commonly used solid-state photodetector element that utilizes the photoelectric effect to convert light signals into electrical signals. The PIN-type photodetector comprises a stacked P-type semiconductor 122a, an intrinsic semiconductor 122b, and an N-type semiconductor 122c. When photodetector 122 receives ultraviolet radiation from the external environment, it absorbs the ultraviolet radiation and generates an electric current. Furthermore, a layer of low-concentration intrinsic semiconductor 122b is doped between P-type semiconductor 122a and N-type semiconductor 122c to increase the width of the depletion region, thereby reducing the effects of diffusion and increasing the speed of photoelectric conversion. This improves the efficiency of detecting ultraviolet intensity in the external environment.

[0070] In a specific embodiment, Figure 5 As shown, the photodetector 122 can be disposed on the substrate 117 of the display panel, facilitating the installation of the circuit of the photodetector 122. In this embodiment, the photodetector 122 can be disposed at any position on the substrate 117, as long as it does not interfere with other components. Furthermore, two or more photodetectors 122 can be disposed to increase the range of the photodetector 122 receiving ultraviolet light, further improving the accuracy of ultraviolet light detection.

[0071] In a specific embodiment, the electronic device 1 may also have a system on chip (SOC), which is electrically connected to the driver chip 125. The driver chip 125 can receive the electrical signal generated by the photodetector 122 and transmit the electrical signal to the SOC chip. The SOC chip can control the display panel 123 through the driver chip 125 to display the detected ultraviolet intensity of the external environment.

[0072] In this embodiment, when the photodetector 122 is exposed to ultraviolet rays, the photodetector 122 can generate current, so that the driving chip 125 electrically connected to the photodetector 122 can receive the electrical signal of the current generated by the photodetector 122 and transmit the electrical signal to the SOC chip. The SOC chip can convert the electrical signal into an ultraviolet intensity signal, and control the display area 124 of the display panel 123 through the driving chip 125 to display the ultraviolet intensity signal to the user, so that the user can know the ultraviolet detection results conveniently and intuitively.

[0073] Among them, such as Figure 2As shown, the display area 124 can be set in the upper right corner of the display panel 123 of the screen 11 for easy viewing by the user. In other embodiments, the display area 124 can also be set in other areas of the display panel 123 according to user needs. The specific setting position of the display area 124 is not limited in this application.

[0074] In order to meet more user needs, electronic devices can also have an ultraviolet ray emission function, which is achieved by providing an ultraviolet ray emission device in the electronic device, such as an ultraviolet light emitting diode (UV lamp). Along the thickness direction of the screen, the UV lamp can be arranged between the screen and the shell of the electronic device, and in order to ensure that the UV lamp can emit ultraviolet rays from the screen to the outside world, a through hole needs to be provided on the screen so that the ultraviolet rays emitted by the UV lamp can be emitted to the outside world through the through hole. However, the ultraviolet rays emitted through the through hole have a small irradiation angle, and because the UV lamp is arranged at the bottom of the screen, other components in the screen are easily damaged by the irradiation of ultraviolet rays during long-term use. At the same time, the additional UV lamp occupies a large space, resulting in an increase in the overall size of the electronic device, reducing the portability of the electronic device, and increasing the overall power consumption of the electronic device.

[0075] In order to solve the above technical problems, Figure 3 and Figure 4 As shown, the organic light emitting layer 114 includes a plurality of second pixels 119 in addition to the first pixel 118 . The second pixel 119 includes a fourth sub-pixel capable of emitting ultraviolet light.

[0076] In this embodiment, the organic light-emitting layer 114 includes second pixels 119 capable of emitting ultraviolet light. This allows the screen 11 to emit ultraviolet light when in operation, eliminating the need for through-holes in the screen 11. This increases the angle of ultraviolet light emission, allowing it to meet a wider range of usage environments and requirements. Furthermore, since the ultraviolet light is emitted from the screen 11 itself, it prevents damage to other components of the screen 11 caused by prolonged exposure to ultraviolet light during use, thereby extending the service life of the electronic device 1. Furthermore, since the screen 11 itself can emit ultraviolet light through the second pixels 119, eliminating the need for a separate ultraviolet light emitting device within the electronic device 1, it can reduce the overall size and power consumption of the electronic device 1, thereby lowering its cost.

[0077] At the same time, in this embodiment, the light-emitting principle of the first pixel 118 and the second pixel 119 in the organic light-emitting layer 114 of the screen 11 is as follows: under the action of the electric field, after the electrons and holes recombine in the organic light-emitting layer 114, they are in a high-energy and unstable state (i.e., an excited state). The excited state will transition to the ground state and release energy in the form of photons during the transition. The wider the bandwidth of the excited state and the ground state, the higher the energy released, and the shorter the wavelength of the emitted light. Therefore, by adjusting the material composition of the second pixel 119 in the organic light-emitting layer 114, the bandwidth of the excited state and the ground state can be adjusted, so that during the transition from the excited state to the ground state, greater energy can be released, that is, ultraviolet light with a shorter wavelength can be emitted, thereby realizing that the screen 11 itself has the function of emitting ultraviolet rays.

[0078] In a specific embodiment, Figure 7 As shown, Figure 7 for Figure 2 FIG. 1 is a schematic structural diagram of the organic light-emitting layer 114 in another specific embodiment, wherein the second pixel 119 is located in the gap between the adjacent first pixels 118 .

[0079] In this embodiment, the second pixel 119 is arranged in the gap between the adjacent first pixel 118, so that the second pixel 119 is integrated into the display area of ​​the screen. While not affecting the screen display, it can also avoid increasing the area of ​​the non-display area of ​​the screen. And the second pixel 119 is located in the gap between the adjacent first pixel 118, which can increase the number of the second pixels 119 and the area occupied by the whole, and improve the intensity and irradiation range of the ultraviolet light emitted by the second pixel 119. And in this embodiment, if Figure 7 As shown, the three sub-pixels of the first pixel 118 in the organic light-emitting layer can be arranged side by side. In other embodiments, the three sub-pixels of the first pixel 118 in the organic light-emitting layer can also be arranged in an array (not shown in the figure). In the embodiment of the present application, the specific location of the second pixel 119 is not limited, and it can be arranged in the gap between the first pixels 118.

[0080] In addition, in this embodiment, the plurality of second pixels 119 may be evenly distributed, thereby improving the uniformity of each region of the display panel 123 when emitting ultraviolet rays, and further improving the overall consistency of the display panel 123 .

[0081] In a specific embodiment, the first pixel 118 and the second pixel 119 may be prepared by vacuum evaporation, that is, the organic light-emitting material and the cathode material may be evaporated onto the cover plate 111 through a high-precision metal mask.

[0082] In a specific embodiment, Figure 3 and Figure 4As shown, the screen 11 may also be provided with a second driving circuit 121, which is used to connect the second pixel 119 in the organic light-emitting layer 114 and the anode 116, so that the second driving circuit 121 can control the second pixel 119 to emit light or stop emitting light.

[0083] In this embodiment, a second driver circuit 121 is provided in the screen 11 to enable the second driver circuit 121 to individually control the second pixel 119 to emit or stop emitting light, allowing the user to turn the ultraviolet emission function on or off as needed. This improves user convenience while also preventing the ultraviolet emission function from being constantly active whenever the screen 11 is turned on, thereby reducing power consumption. Furthermore, the second driver circuit 121 is electrically connected to the driver chip, which can control the ultraviolet emission function to be on or off via the second driver circuit 121.

[0084] In a specific embodiment, the second pixel 119 can also emit purple light.

[0085] In this embodiment, when the second driving circuit 121 controls the second pixel 119 to emit light, the second pixel 119 can emit ultraviolet light and purple light at the same time, so that the user can quickly identify whether the ultraviolet emission function is turned on with the naked eye, avoiding damage caused by long-term exposure to ultraviolet rays to the user, and improving the safety of use of the electronic device 1.

[0086] In this embodiment, as described above, the wavelength range of the emitted light can be adjusted by adjusting the material composition of the second pixel 119 in the organic light-emitting layer 114. Therefore, by adjusting the material composition of the second pixel 119, the bandwidth of the excited state and the ground state is adjusted, thereby releasing more energy during the transition from the excited state to the ground state, enabling the second pixel 119 to emit light with a wavelength of 100-400nm. Since the wavelength range of light visible to the human eye is between 380-750nm, the second pixel 119 can emit both ultraviolet light and violet light visible to the human eye, thereby prompting the user whether to enable the ultraviolet emission function, thereby improving the safety of the electronic device 1.

[0087] In some embodiments, the material of the organic light-emitting layer 114 corresponding to the second pixel 119 described above can be an organic compound containing carbazole, fluorene, triphenylamine, or pentphenyl. The second pixel 119 formed by the ultraviolet light-emitting material in this embodiment has the advantages of being non-toxic and having high strength, will not cause pollution to the environment, and is relatively strong and not easy to damage.

[0088] In a specific embodiment, the first driving circuit 120 and the second driving circuit 121 may be a 7T1C circuit. The 7T1C circuit is composed of seven transistors and a capacitor, wherein the transistors are used to drive the first pixel 118 and the second pixel 119 to emit light, and the capacitor is used to store the driving signal.

[0089] In this embodiment, the first drive circuit 120 is a 7T1C circuit, which ensures the stability of the current during operation of the first drive circuit 120. The 7T1C circuit has the advantages of high pixel consistency, low power consumption, and a high refresh rate, which can improve the display effect of the screen 11. The second drive circuit 121 is a 7T1C circuit, which ensures the stability of the current during operation of the second drive circuit 121, allowing the screen 11 to emit uniform and moderately intense ultraviolet rays, thereby improving the performance of the ultraviolet emission function.

[0090] In another specific embodiment, the second driving circuit 121 may also be a pixel driving circuit commonly used in the art, such as 2T1C, 3T1C, or 5T1C. The present application does not limit the specific structure of the second driving circuit 121.

[0091] In a specific embodiment, the specific structure of the second driving circuit 121 may be as shown in FIG. 8 .

[0092] In this embodiment, the second driving circuit 121 includes switching transistors (T1, T2, T4, T5, T6, T7), a driving transistor (T3), a storage capacitor (Cst), a reset pulse signal (Reset), a scan pulse signal (Gata), a light-emitting signal (EM), a data pulse signal (Vdata), and DC voltage signals (VDD, Vinit, VSS). The operation process of the second driving circuit 121 includes a reset phase, a data writing phase, and a light-emitting phase, specifically:

[0093] In the reset stage: the reset pulse signal Reset is a low-level signal, the scanning pulse signal Gata and the luminous signal EM are high-level signals; the switching transistor T1 and the switching transistor T7 are turned on, and the gate of the driving transistor T3 is written with the initialization signal Vinit by the first initialization signal terminal, preparing for the writing of the next frame data pulse signal Vdata.

[0094] During the data writing phase, the scan pulse signal Gata is low, the reset pulse signal Reset and the emission signal EM are high, and the switching transistors T4 and T2 are turned on. The driving transistor T3 is connected to the switching transistor T2 to form a diode structure. The data pulse signal Vdata is written to the gate of the driving transistor T3 through the switching transistors T4 and T2 until the driving transistor T3 is turned off. The gate voltage of the driving transistor T3 is stored in the storage capacitor Cst.

[0095] During the light-emitting phase, the light-emitting signal EM is low, the scanning pulse signal Gata and the reset pulse signal Reset are high, the switching transistors T5 and T6 are both on, the source of the driving transistor T3 is connected to the first power supply terminal, and the source voltage of the driving transistor T3 instantaneously changes from Vdata in the previous phase to VDD. The light-emitting device D emits light under the drive of the driving transistor T3.

[0096] The above description is merely a specific implementation of the embodiments of the present application, but the scope of protection of the embodiments of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present application shall be included in the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the embodiments of the present application shall be based on the scope of protection of the claims.

Claims

1. A screen, characterized in that: The screen includes a display panel and a driver chip, and the driver chip is used to control the display panel; at least one photodetector is also provided in the display panel, and the photodetector is electrically connected to the driver chip, and is used to detect the ultraviolet intensity of the external environment.

2. The screen according to claim 1, characterized in that The photodetector is a PIN type photodetector.

3. The screen according to claim 1, characterized in that The display panel includes a cathode, an electron transport layer, an organic light-emitting layer, a hole transport layer, an anode and a substrate stacked in sequence, and the photodetector is arranged on the substrate; The driving chip is located outside the display panel, and the driving chip is electrically connected to the photodetector through a circuit.

4. The screen according to claim 3, characterized in that The organic light-emitting layer includes a first pixel and a second pixel. The first pixel includes a first sub-pixel, a second sub-pixel and a third sub-pixel. The first sub-pixel can emit red light, the second sub-pixel can emit green light, and the third sub-pixel can emit blue light. The second pixel can emit ultraviolet light.

5. The screen according to claim 4, characterized in that The second pixel is disposed in a gap between adjacent first pixels.

6. The screen according to claim 5, characterized in that The second pixels are evenly distributed.

7. The screen according to claim 4, characterized in that The screen also includes a first driving circuit and a second driving circuit. The driving chip is electrically connected to the first driving circuit and the second driving circuit. The driving chip controls the first pixel to emit light or stop emitting light through the first driving circuit, and the driving chip controls the second pixel to emit light or stop emitting light through the second driving circuit.

8. The screen according to claim 7, characterized in that The first driving circuit and the second driving circuit are 7T1C circuits.

9. The screen according to any one of claims 4 to 8, characterized in that: The second pixel is also capable of emitting purple light.

10. The screen according to any one of claims 4 to 8, characterized in that: The material of the organic light-emitting layer corresponding to the second pixel is a carbazole-containing, fluorene-containing, triphenylamine-containing, or pentylphenyl-containing organic compound.

11. An electronic device, characterized in that: The electronic device comprises: case; A screen, wherein the screen is the screen according to any one of claims 1 to 10; Wherein, the screen is arranged on the shell.

12. The electronic device according to claim 11, wherein: The electronic device also includes a SOC chip, which is electrically connected to the driver chip. The driver chip can receive the electrical signal generated by the photodetector and transmit the electrical signal to the SOC chip. The SOC chip can control the display panel to display the detected ultraviolet intensity of the external environment through the driver chip.

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