Array substrate, display panel and display device

Abstract

The utility model provides an array substrate, a display panel and a display device. According to the array substrate, the characteristic that the photo-thermal conversion layer can convert the absorbed invisible light into heat and emit light is utilized, the photo-thermal conversion layer is arranged between the substrate and the circuit layer, the circuit layer can be heated in a low-temperature environment, the array substrate can be suitable for the low-temperature environment, and the service life of the display panel can be prolonged. In addition, the light emitted by the photothermal conversion layer can enhance the transmittance of the display panel.

Description

TECHNICAL FIELD

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

[0002] TFT LCD (Thin Film Transistor Liquid Crystal Display) has been widely used in people's daily life, but it is still restricted by the environment in some special working environments. In a low-temperature environment, the resistance, capacitance or inductance of the internal devices of the display change due to the decrease in temperature, thereby affecting the normal operation of the electronic components, and even causing electrical failure. At the same time, low temperature can also cause changes in the internal structure of electronic components, such as material expansion or contraction, resulting in changes in the physical structure of the components, which can damage the integrity of the electronic components and reduce their service life. Therefore, it is an urgent problem to design a display that can be used in a low-temperature environment. UTILITY MODEL CONTENT

[0003] The technical problem solved by the present application is to provide an array substrate, a display panel and a display device, which solves the problem of how to use the display in a low-temperature environment in the prior art.

[0004] To solve the above technical problem, the first technical solution provided by the present application is to provide an array substrate, which comprises:

[0005] a substrate;

[0006] a circuit layer arranged on one side of the substrate;

[0007] a light-heat conversion layer arranged between the substrate and the circuit layer, configured to absorb invisible light and convert the invisible light into heat and emit light.

[0008] The light-heat conversion layer is a full-surface coating.

[0009] The light emitted by the light-heat conversion layer is monochromatic light or mixed light.

[0010] The array substrate comprises at least two sub-pixels of different colors; the light-heat conversion layer comprises a plurality of first conversion units, the first conversion units are arranged one by one corresponding to the sub-pixels, and the primary color of the light emitted by the first conversion units is the same as the color of the corresponding sub-pixels.

[0011] The light-heat conversion layer further comprises a plurality of second conversion units, and the second conversion units are located at the side edges of the first conversion units.

[0012] In the direction parallel to the substrate, the second conversion units are located at the side edges of the sub-pixels.

[0013] The light-heat conversion layer is an up-conversion luminescent material doped with rare earth ions.

[0014] To solve the above technical problems, a second technical solution provided by the present application is to provide a display panel, comprising an array substrate and a counter substrate arranged oppositely.

[0015] The display panel further comprises a color filter, which is located on the side of the circuit layer away from the substrate; the color filter comprises a plurality of color resists, which are arranged one-to-one corresponding to the sub-pixels.

[0016] To solve the above technical problems, a third technical solution provided by the present application is to provide a display device, comprising:

[0017] The display panel is the display panel described above;

[0018] The backlight module.

[0019] The backlight module comprises a first light source and a second light source which are independently controlled; the first light source emits visible light, and the second light source emits near-infrared light.

[0020] The wavelength of the near-infrared light is 800nm-1000nm.

[0021] The present application has the following beneficial effects: Different from the prior art, the present application provides an array substrate, a display panel and a display device. The array substrate comprises a substrate, a circuit layer and a light-heat conversion layer. The circuit layer is arranged on one side of the substrate. The light-heat conversion layer is arranged between the substrate and the circuit layer, and is configured to absorb invisible light, convert the invisible light into heat and emit light. The present application utilizes the characteristic that the light-heat conversion layer can convert the absorbed invisible light into heat and emit light, and arranges the light-heat conversion layer between the substrate and the circuit layer. The circuit layer can be heated in a low-temperature environment, so that the array substrate can be applicable to a low-temperature environment and is beneficial to prolong the service life of the display panel. In addition, the light emitted by the light-heat conversion layer can also enhance the transmittance of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0023] Figure 1 is a structural schematic diagram of an embodiment of the array substrate provided by the present application;

[0024] Figure 2 is a NaLuF4:Nd 3+ / Yb 3+ schematic diagram of an energy transfer process of the NaLuF4:Nd

[0025] Figure 3 is a diagram of a Dicke level provided by an embodiment of the present application.

[0026] Figure 4 is a structural schematic diagram of another embodiment of an array substrate provided by an embodiment of the present application.

[0027] Figure 5 is a structural schematic diagram of an embodiment of a display panel provided by an embodiment of the present application.

[0028] Figure 6 is a structural schematic diagram of an embodiment of a display device provided by an embodiment of the present application.

[0029] Figure 7 is a structural schematic diagram of an embodiment of a backlight module provided by an embodiment of the present application.

[0030] Explanation of the reference signs:

[0031] 1, display panel; 100, array substrate; 10, substrate; 20, circuit layer; 30, light-heat conversion layer; 31, first conversion unit; 31A, red conversion unit; 31B, green conversion unit; 31C, blue conversion unit; 32, second conversion unit; 40, sub-pixel; R, red sub-pixel; G, green sub-pixel; B, blue sub-pixel; 50, data line; 60, scanning line; 70, color filter; 710, color resistance; 80, black matrix; 90, polarizer; 200, opposite substrate; 300, liquid crystal layer; 2, backlight module; 201, first light source; 202, second light source; 203, power control unit; 3, display device. DETAILED DESCRIPTION

[0032] The scheme of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0033] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. The present application may, however, be practiced without these details. In other instances, well-known methods have not been described in detail in order not to unnecessarily obscure the present application.

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0035] The terms "first", "second", "third", etc. in the present application are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0036] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0037] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of an embodiment of an array substrate provided by the embodiments of the present application, Figure 2 is an energy transfer process schematic diagram of NaLuF4:Nd 3+ / Yb 3+ provided by the embodiments of the present application, Figure 3 is a diagram of the Dick level provided by the embodiments of the present application.

[0038] The present application provides an array substrate 100. The array substrate 100 includes a substrate 10 (see Figure 5 ), a circuit layer 20 and a photo-thermal conversion layer 30. The circuit layer 20 is disposed on one side of the substrate 10. The photo-thermal conversion layer 30 is disposed between the substrate 10 and the circuit layer 20, and is configured to absorb invisible light, and convert the invisible light into heat and emit light.

[0039] This embodiment utilizes the property of the photothermal conversion layer 30 to convert absorbed invisible light into heat and emit light. The photothermal conversion layer 30 is disposed between the substrate 10 and the circuit layer 20. In low-temperature environments, the circuit layer 20 can be heated, making the array substrate 100 suitable for low-temperature environments and beneficial for extending the lifespan of the display panel 1 (see...). Figure 5 The lifespan of the display panel 1 is extended. Secondly, the light emitted by the photothermal conversion layer 30 can also enhance the transmittance of the display panel 1.

[0040] The array substrate 100 is used in the display panel 1.

[0041] The substrate 10 is transparent. The substrate 10 can be a rigid material, such as glass, quartz, or sapphire. The substrate 10 can also be a flexible material, such as polyimide (PI) or polyethylene terephthalate (PET). The material of the substrate 10 is not limited here and can be selected according to actual needs.

[0042] The circuit layer 20 includes structures such as a thin-film transistor layer (not shown) and a pixel electrode layer (not shown). The circuit layer 20 is used to control the state of each sub-pixel 40 in the display panel 1. In some embodiments, the circuit layer 20 can also perform some simple data processing tasks, such as storing charge or regulating the current magnitude to achieve high resolution and fast response.

[0043] There are no restrictions on the specific structure of line layer 20 here; it can be selected according to actual needs.

[0044] In some embodiments, the photothermal conversion layer 30 is an upconversion luminescent material doped with rare earth ions.

[0045] Upconversion luminescent materials doped with rare-earth ions undergo a non-radiative relaxation process during photoluminescence, releasing energy as heat; this process is called photothermal conversion. For example, NaLuF4:Nd... 3+ / Yb 3+ Taking @SiO2@Cu2S as an example, the principle of its photothermal conversion is explained as follows: Figure 2 As shown. Yb 3+ and Nd 3+ Energy transfer pathways in co-doped systems can be divided into two types: single-photon processes (ET1) and two-photon processes (ET2 and ET3). In the ET1 process, when 980nm light irradiates the fluoride layer, Yb... 3+ It absorbs light at 980nm, and its energy level changes from... 4 F 5 / 2 Leap to 4 F 7 / 2 Subsequently Yb 3+Energy is transferred to the ground state of Nd by a phonon-assisted energy transfer process 3+ , thereby transitioning to Nd 3+ : 4 F 3 / 2 energy level (ET1), 4 F 3 / 2 which can transition to 4 F 5 / 2 and 4 F 7 / 2 energy level, and then transition down to emit red light. In the ET2 process, Yb 3+ absorbs 980 nm light and transitions to 4 F 7 / 2 , and then transfers energy to the ground state of Nd 3+ 4 I 15 / 2 energy level by a phonon-assisted energy transfer process, and then the Nd 3+ absorbs another 2 F 7 / 2 energy level of Yb 3+ transitions to 2 H 11 / 2 , and then further transitions to 4 F 3 / 2 , 4 F 5 / 2 and 4 F 7 / 2 energy level by a non-radiative relaxation process, and then transitions down to emit red light. In this series of non-radiative relaxation processes, part of the energy is converted into heat, causing the material to warm up, which can increase from room temperature to about 67°C, and the increase is determined by the power of the 980 nm laser, and the material is reusable. Different doped ions emit light at different wavelengths.

[0046] That is, the embodiment of the present application uses the upconversion luminescent material doped with rare earth ions as the photothermal conversion layer 30, and uses the heat generated by the non-radiative relaxation of the photothermal conversion layer 30 to heat the line layer 20, so that the display panel 1 can be normally used in a low-temperature environment. In addition, the rare earth ions in the photothermal conversion layer 30 can also emit light through radiative transition to enhance the transmittance of the display panel 1.

[0047] In some embodiments, the light emitted by the photothermal conversion layer 30 is monochromatic light or mixed light.

[0048] Exemplarily, in the unexcited state, the photothermal conversion layer 30 is transparent or white.

[0049] ​The light-heat conversion layer 30 is excited by invisible light, i.e. in the excited state, the light-heat conversion layer 30 emits monochromatic light or mixed light of specific colors such as green, red, blue, etc. depending on the different doped ions.

[0050] The doped rare earth ions can be single-doped, for example, YVO4:Nd 3+ The doped rare earth ions can also be double-doped or multi-doped, for example, NaLuF4:Yb 3+ / Nd 3+ , NaYF4:Yb 3+ / Er 3+ @Yb 3+ / Nd 3+ , etc.

[0051] That is, the light-heat conversion layer 30 can emit monochromatic light or mixed light in the excited state, depending on the different doped ions and the different doping methods (i.e. single-doped, double-doped or multi-doped). The mixed light can be light composed of multiple different wavelengths. If the intensity distribution of the light of each wavelength in the mixed light is uniform, the mixed light perceived by the human eye can be white light. If some wavelengths of light dominate, the mixed light perceived by the human eye can be a specific color, for example, red, green or blue, etc.

[0052] In some embodiments, the light-heat conversion layer 30 is a full-surface coating.

[0053] Exemplarily, the light-heat conversion layer 30 is a full-surface white coating.

[0054] The light-heat conversion layer 30 of the full-surface coating can emit monochromatic light or mixed light in the excited state, which is not limited here and can be selected according to actual needs.

[0055] In some embodiments, the light-heat conversion layer 30 is a full-surface coating, and is an up-conversion luminescent material using fluoride as a matrix material and using at least one of Eu 3+ , Nd 3+ , Pm 3+ , Ho 3+ as a doped material. The main color of the light emitted by the light-heat conversion layer 30 in the excited state is red, i.e. the light-heat conversion layer 30 mainly emits red light in the excited state.

[0056] The main color of the light emitted by the light-heat conversion layer 30 in the excited state can be understood as the specific color of the light emitted by the light-heat conversion layer 30 perceived by the human eye. That is, the main color is the color of the light of the dominant wavelength in the mixed light, or the color of the monochromatic light.

[0057] For example, the light-heat conversion layer 30 can be a full-surface coating, and can be an up-conversion luminescent material using fluoride as a matrix material and using at least one of Eu 3+ , Nd 3+ , Pm 3+ , Ho 3+ as a doped material. Figure 3As shown, the rare earth elements have red light emission energy levels, while some ions also have emission energy levels of other colors. During the radiative transition process, other colors of light may be generated. However, by adjusting the concentration of doped ions and selecting co-doped ions, the emission intensity of red light can be made relatively the strongest, while reducing the emission intensity of other colors of light. That is, red light dominates in the mixed light emitted by the photothermal conversion layer 30.

[0058] In other embodiments, the photothermal conversion layer 30 is a full-surface coating, and uses fluoride as the matrix material and Tb 3+ Ce 3+ 、Sm 3+ Er 3+ At least one of the following is used as an upconversion luminescent material as a dopant. The primary color of the light emitted by the photothermal conversion layer 30 in the excited state is green, that is, the photothermal conversion layer 30 mainly emits green light in the excited state.

[0059] In some other embodiments, the photothermal conversion layer 30 is a full-surface coating, and uses fluoride as the matrix material, employing Eu... 2+ Tm 3+ Pr 3+ At least one of the following is used as an upconversion luminescent material as a dopant. The primary color of the light emitted by the photothermal conversion layer 30 in the excited state is blue, that is, the photothermal conversion layer 30 mainly emits blue light in the excited state.

[0060] In this embodiment, the photothermal conversion layer 30 is prepared as a full-surface coating, eliminating the need for additional exposure molds and saving costs. Simultaneously, the photothermal conversion layer 30 emits light of a specific wavelength under the action of an excitation light source, enhancing the transmittance of the display panel 1.

[0061] In some embodiments, the matrix material of the photothermal conversion layer 30 may also be other compounds such as oxides.

[0062] Please see Figures 1 to 4 , Figure 4 This is a schematic diagram of another embodiment of the array substrate provided in this application.

[0063] In some embodiments, the array substrate 100 includes at least two sub-pixels 40 with different colors. The photothermal conversion layer 30 includes a plurality of first conversion units 31, each of which is corresponding to a sub-pixel 40, and the primary color of the light emitted by the first conversion unit 31 is the same as the color of the corresponding sub-pixel 40.

[0064] The sub-pixel 40 is the smallest unit of displaying color in the array substrate 100, and is also the smallest unit of displaying color in the display panel 1. Each sub-pixel 40 is responsible for displaying a basic color, such as red, green, or blue, etc. By adjusting the light transmittance of each sub-pixel 40 and the sub-pixels 40 of different colors, various colors can be reproduced.

[0065] The color of the sub-pixel 40 can be the basic color displayed by the sub-pixel 40.

[0066] In the direction perpendicular to the substrate 10, the sub-pixel 40 is arranged to at least partially overlap the first conversion unit 31, so that the light emitted by the first conversion unit 31 can enhance the transmittance of the corresponding sub-pixel 40.

[0067] Exemplarily, in the direction perpendicular to the substrate 10, the sub-pixel 40 is arranged to completely overlap the first conversion unit 31, so as to improve the utilization rate of the light emitted by the first conversion unit 31, and further enhance the transmittance of the corresponding sub-pixel 40.

[0068] Exemplarily, the array substrate 100 includes three kinds of sub-pixels 40 of different colors, which are red sub-pixels R, blue sub-pixels B, and green sub-pixels G, respectively.

[0069] The first conversion unit 31 corresponding to the red sub-pixel R is a red conversion unit 31A, the first conversion unit 31 corresponding to the green sub-pixel G is a green conversion unit 31B, and the first conversion unit 31 corresponding to the blue sub-pixel B is a blue conversion unit 31C.

[0070] The red conversion unit 31A is an up-conversion light-emitting material using fluoride as a matrix material and at least one of Eu 3+ , Nd 3+ , Pm 3+ , Ho 3+ as a doping material. The dominant color of the light emitted by the red conversion unit 31A in the excited state is red.

[0071] The green conversion unit 31B is an up-conversion light-emitting material using fluoride as a matrix material and at least one of Tb 3+ , Ce 3+ , Sm 3+ , Er 3+ as a doping material. The dominant color of the light emitted by the green conversion unit 31B in the excited state is green.

[0072] The blue conversion unit 31C is an up-conversion light-emitting material using fluoride as a matrix material and at least one of Eu 2+ , Tm 3+ , Pr 3+The up-conversion luminescent material in the first conversion unit 31 is configured to emit light in a first color, and the up-conversion luminescent material in the at least one second conversion unit 32 is configured to emit light in a second color different from the first color.

[0073] The present embodiment is configured to design the primary color of the light emitted by the first conversion unit 31 to be the same as the color of the corresponding sub-pixel 40, and to enhance the transmittance of the sub-pixel 40 in a targeted manner, so as to not only improve the utilization rate of the light emitted by the light-heat conversion layer 30, but also enhance the color display of the display panel 1, and further improve the transmittance of the display panel 1.

[0074] In some embodiments, the light-heat conversion layer 30 further comprises a plurality of second conversion units 32 (see Figure 4 The second conversion unit 32 is located at the side of the first conversion unit 31. In the direction parallel to the substrate 10, the second conversion unit 32 is located at the side of the sub-pixel 40.

[0075] Specifically, the circuit layer 20 further comprises a plurality of data lines 50 and a plurality of scan lines 60. The data lines 50 and the scan lines 60 are arranged in a grid manner to form a plurality of pixel regions (not shown in the figure). Each pixel region is provided with at least one sub-pixel 40.

[0076] For example, one pixel region is provided with one sub-pixel 40. The data lines 50 and the scan lines 60 are formed in the circuit layer 20. In the direction perpendicular to the substrate 10, at least part of the second conversion unit 32 is arranged directly below the data lines 50, and / or at least part of the second conversion unit 32 is arranged directly below the scan lines 60.

[0077] For example, in the direction perpendicular to the substrate 10, part of the second conversion unit 32 is arranged directly below the data lines 50, and part of the second conversion unit 32 is arranged directly below the scan lines 60. The second conversion unit 32 and the first conversion unit 31 jointly form the light-heat conversion layer 30.

[0078] The light emitted by the second conversion unit 32 can be monochromatic light or mixed light, and the color of the light emitted by the second conversion unit 32 is not limited herein.

[0079] In the present embodiment, the second conversion unit 32 is arranged at the side of the first conversion unit 31 to jointly form the light-heat conversion layer 30, which is conducive to uniformly heating the circuit layer 20.

[0080] Please refer to Figures 1 to 5 , Figure 5 is a structural schematic diagram of an embodiment of the display panel provided in the present application.

[0081] The present application provides a display panel 1. The display panel 1 comprises an array substrate 100 and a counter substrate 200 arranged oppositely. The array substrate 100 is the array substrate 100 described above.

[0082] The display panel 1 further comprises a liquid crystal layer 300, which is located between the array substrate 100 and the opposite substrate 200.

[0083] In some embodiments, the display panel 1 further comprises a color filter 70, which is located on the side of the circuit layer 20 away from the substrate 10. The color filter 70 comprises a plurality of color resist 710, which is arranged one-to-one corresponding to the sub-pixel 40.

[0084] One color resist 710 corresponds to one sub-pixel 40.

[0085] The color filter 70 can be arranged in the opposite substrate 200 or in the array substrate 100, which is not limited here and can be selected according to actual needs.

[0086] For example, the color filter 70 is arranged in the opposite substrate 200.

[0087] The display panel 1 further comprises a black matrix 80, which is arranged on the side of the color resist 710 to prevent pixel crosstalk.

[0088] For example, the display panel 1 further comprises two polarizers 90, one of which is arranged on the side of the array substrate 100 away from the opposite substrate 200, and the other of which is arranged on the side of the opposite substrate 200 away from the array substrate 100. The polarizer 90 is used to convert the light incident on the display panel 1 into polarized light and control the transmittance of the light.

[0089] Please refer to Figures 1 to 7 , Figure 6 is a structural schematic diagram of an embodiment of a display device provided by the present application, Figure 7 is a structural schematic diagram of an embodiment of a backlight module provided by the present application.

[0090] The present application provides a display device 3. The display device 3 comprises a display panel 1 and a backlight module 2. The display panel 1 is the display panel 1 described above.

[0091] Specifically, the display panel 1 is a liquid crystal panel.

[0092] The backlight module 2 is used to provide a light source for the display panel 1 and is arranged opposite to the display panel 1.

[0093] For example, the backlight module 2 is located on the side of the array substrate 100 away from the opposite substrate 200.

[0094] In some embodiments, the backlight module 2 comprises a first light source 201 and a second light source 202 which are independently controlled. The first light source 201 emits visible light, and the second light source 202 emits near-infrared light. The wavelength of the near-infrared light is 800-1000 nm.

[0095] The first light source 201 is used to provide light for display of the display panel 1, so that the display panel 1 can display images. The second light source 202 is used to provide an excitation light source for the photo-thermal conversion layer 30, so that the photo-thermal conversion layer 30 can generate heat and emit light in an excited state.

[0096] Exemplarily, the first light source 201 can be a light-emitting diode (LED).

[0097] The first light source 201 can be a side-in light source or a direct light source, which is selected according to actual needs. The arrangement of the first light source 201 is not limited herein.

[0098] Exemplarily, the first light source 201 is a direct light source, there are multiple first light sources 201, and the first light sources 201 are arranged in an array.

[0099] The first light source 201 and the second light source 202 are independently controlled, so that the first light source 201 and the second light source 202 can work simultaneously or non-simultaneously. Specifically, when the first light source 201 works, the second light source 202 can not work, for example, in a normal temperature environment, the circuit layer 20 does not need to be heated, that is, the first light source 201 does not need to work. Alternatively, the second light source 202 works first, and the first light source 201 works later, for example, in a lower environment temperature, the second light source 202 works first to preheat the circuit layer 20, so that when the first light source 201 works, the display panel 1 can work normally. Alternatively, the first light source 201 and the second light source 202 work simultaneously to improve the display effect of the display panel 1 in a low temperature environment. Alternatively, the first light source 201 and the second light source 202 start working simultaneously, and the second light source 202 can work in selected time periods according to needs, for example, as the work continues, the circuit in the circuit layer 20 will also generate heat due to its own resistance and accumulate, and the second light source 202 does not need to work continuously, and can select the working state of the second light source 202 in different time periods according to the temperature of the circuit layer 20.

[0100] Exemplarily, all the first light sources 201 are controlled uniformly, and all the second light sources 202 are controlled uniformly.

[0101] In other embodiments, the first light sources 201 can be controlled in zones, and / or the second light sources 202 can be controlled in zones, so as to control according to the display of the display panel 1.

[0102] Exemplarily, the first light source 201 and the second light source 202 are arranged in an array, and each row of light sources includes only the first light source 201 or the second light source 202. Each row of the first light source 201 and each row of the second light source 202 are arranged alternately in the column direction.

[0103] In other embodiments, the first light source 201 and the second light source 202 can be arranged in other manners, which are not limited here and can be selected according to actual needs.

[0104] The display device 3 further includes a power control unit 203 configured to control the working power of the second light source 202. The power control unit 203 can adjust the working power of the second light source 202 according to the ambient temperature of the circuit layer 20 and the display condition of the display panel 1. The adjustability of the power can prevent the display panel 1 from being damaged due to excessively high heating temperature.

[0105] The embodiment can adjust the heating temperature of the light-heat conversion layer 30 by adjusting the power of the second light source 202 in a low-temperature environment at different temperatures, so as to ensure the display effect and refresh rate of the display device 3 in the low-temperature environment, and prevent the display device 3 from being damaged due to overheating.

[0106] Exemplarily, the second light source 202 is a near-infrared light source, and the wavelength of the near-infrared light emitted by the near-infrared light source is 980 nm or 808 nm. The near-infrared light at this wavelength can generate a large amount of heat in the excited state of the light-heat conversion layer 30, so as to better heat the circuit layer 20 in a low-temperature environment.

[0107] Exemplarily, the second light source 202 can be a near-infrared light-emitting diode, a laser diode, or the like.

[0108] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0109] The above is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An array substrate, characterized by, The display panel comprises: a substrate; a circuit layer arranged on one side of the substrate; a photo-thermal conversion layer arranged between the substrate and the circuit layer, configured to absorb invisible light, convert the invisible light into heat and emit light.

2. The array substrate of claim 1, wherein, The photo-thermal conversion layer is a full-surface coating.

3. The array substrate of claim 1, wherein, The light emitted by the photo-thermal conversion layer is monochromatic light or mixed light.

4. The array substrate of claim 1, wherein, The array substrate comprises at least two sub-pixels with different colors; the photo-thermal conversion layer comprises a plurality of first conversion units, the first conversion units are arranged one-to-one corresponding to the sub-pixels, and the primary color of the light emitted by the first conversion units is the same as the color of the corresponding sub-pixels.

5. The array substrate of claim 4, wherein, The photo-thermal conversion layer further comprises a plurality of second conversion units, the second conversion units are arranged on the side edges of the first conversion units. In the direction parallel to the substrate, the second conversion units are arranged on the side edges of the sub-pixels.

6. The array substrate of claim 1, wherein, The photo-thermal conversion layer is an up-conversion luminescent material doped with rare earth ions.

7. A display panel, characterized by The display panel comprises an array substrate and a counter substrate arranged opposite to each other; the array substrate is any one of the array substrates in claims 1 to 6.

8. The display panel of claim 7, wherein, The display panel further comprises a color filter, the color filter is arranged on the side of the circuit layer away from the substrate; the color filter comprises a plurality of color resistances, the color resistances are arranged one-to-one corresponding to the sub-pixels.

9. A display device, characterized by comprising: The display panel comprises: a display panel, the display panel is any one of the display panels in claims 7 or 8; a backlight module.

10. The display device according to claim 9, wherein The backlight module comprises a first light source and a second light source which are independently controlled; the first light source emits visible light, and the second light source emits near-infrared light. The wavelength of the near-infrared light is 800nm to 1000nm.

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