Optical device, backlight plate, display panel, and display apparatus

Abstract

The utility model provides an optical device, a backlight plate, a display panel and display equipment, and relates to the technical field of optics, the optical device is applied to the display panel, the display panel is covered by covering glass, the display panel comprises a light-emitting layer, the optical device comprises N film layer structures, N is larger than 1, and the N film layer structures are closely arranged on the side, away from the covering glass, of the light-emitting layer, the transparency of the film layer structure is related to a voltage value applied to the film layer structure. Based on the scheme, when the display panel performs picture display, the transparency of a plurality of partitions of the hardware of the display panel can be adjusted, so that the interference of ambient light on the picture displayed by the display panel can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and more specifically, to optical devices, backlight plates, display panels, and display devices. Background Art

[0002] With the development of display technologies, transparent display screens have been developed, which can provide users with unique visual effects. For example, they can achieve a visual superposition effect, allowing users to see the content displayed on the screen while also enabling them to see the objects behind the screen. Based on this feature, transparent display screens are widely used in various fields, such as commercial displays, smart homes, terminal devices, etc.

[0003] However, since the current transparent display screen is entirely in a transparent state, when the transparent display screen is displaying, the ambient light around the display screen may cause significant interference to the image displayed on the transparent display screen, making it difficult for users to distinguish the displayed content from the background content, that is, the display effect of the transparent display screen in a relatively complex ambient light environment is poor. Summary of the Utility Model

[0004] This application provides an optical device, a backlight plate, a display panel, and a display device, which can enable multiple partitions of the display panel hardware itself to have different transparencies while the display panel is displaying an image, so as to present the objects corresponding to the back of the display panel to the user through the display screen.

[0005] In a first aspect, an optical device is provided, which is applied to a display panel. The display panel is covered by a cover glass (CG), and the display panel includes a light-emitting layer. The optical device includes N film layer structures, where N>1, and the N film layer structures are closely arranged on the side of the light-emitting layer facing away from the CG. The transparency of the film layer structure is related to the voltage value applied to the film layer structure.

[0006] In combination with the first aspect, in some implementation manners of the first aspect, the above film layer structure includes: a first electrode layer; a first material layer, the first material layer is located on the side of the first electrode layer close to the CG, the first material layer includes a first material, and the first material is an anode electrochromic material; a second material layer, the second material layer is located on the side of the first material layer close to the CG, the second material layer includes a second material, and the second material is a cathode electrochromic material; a second electrode layer, the second electrode layer is located on the side of the second material layer close to the CG.

[0007] In combination with the first aspect, in some implementation manners of the first aspect, the transparencies of the first material layer and the second material layer are related to the voltage value applied across the two ends of the first electrode layer and the second electrode layer.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the film layer structure further includes a reflective layer, which is located between the second electrode layer and the light-emitting layer. Reflective particles are injected into the reflective layer, and the reflective particles are used to reflect the light from the light-emitting layer back to the light-emitting layer.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the film layer structure further includes a conductive layer, which is located between the first material layer and the second material layer, and the conductive layer includes a transparent viscous electrolyte.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the optical device further includes a control circuit, which is connected to N film layer structures. The control circuit is configured to input voltage signals to the N film layer structures correspondingly to control the transparency of the N film layer structures, and the voltage signals input to the N film layer structures are the same or different.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the first material includes nickel oxide (NiO), and the second material includes tungsten oxide (WO3).

[0012] In combination with the first aspect, in certain implementations of the first aspect, the reflective particles are uniformly distributed in the reflective layer.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the reflective layer is a transparent material, and the reflective particles include at least one of the following substances: metal oxide, silicon dioxide (SiO2), and polymer particles. The diameter of the reflective particles is in the range of [10nm, 30nm], and the concentration of the reflective particles in the reflective layer is in the range of [30%, 40%].

[0014] In combination with the first aspect, in certain implementations of the first aspect, the first electrode layer and the second electrode layer include transparent conductive oxides.

[0015] In a second aspect, a backlight panel is provided, which includes a light guide plate, a side light source, and an optical device in any possible implementation of the optical device design in the first aspect.

[0016] In a third aspect, a display panel is provided, which includes a light-emitting layer and an optical device in any possible implementation of the optical device design in the first aspect, or includes a backlight panel in any possible implementation of the backlight panel design in the second aspect.

[0017] In a fourth aspect, a display device is provided, which includes a display panel in any possible implementation of the display panel design in the third aspect. Description of the Drawings

[0018] Figure 1It is a schematic structural diagram of an optical device 100 proposed in an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram showing the relationship between the transparency and voltage of an electrochromic material applicable to an embodiment of the present application;

[0020] Figure 3 It is another schematic structural diagram of an optical device 100 proposed in an embodiment of the present application;

[0021] Figure 4 It is another schematic structural diagram of an optical device 100 proposed in an embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of transparency zoning implemented based on the optical device 100 proposed in an embodiment of the present application;

[0023] Figure 6 It is another schematic diagram of transparency zoning implemented based on the optical device 100 proposed in an embodiment of the present application;

[0024] Figure 7 It is a schematic diagram of a display panel 700 proposed in an embodiment of the present application;

[0025] Figure 8 It is a schematic flowchart of a voltage control method 800 proposed in an embodiment of the present application. Detailed implementation manners

[0026] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0027] The embodiments of the present application will present various aspects, embodiments or features around a system including multiple devices, components, modules, etc. It should be understood and clear that each system may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, combinations of these solutions can also be used.

[0028] In addition, in the embodiments of the present application, words such as "exemplary", "for example", etc. are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0029] The business scenarios described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art can know that with the evolution of technology and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0030] References to "one embodiment" or "some embodiments" or the like described in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0031] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent: including the case where A exists alone, the case where A and B exist simultaneously, and the case where B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or a similar expression thereof refers to any combination of these items, including any combination of a single item or plural items. For example, at least one (item) of a, b, or c may represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, c may be single or plural.

[0032] In the description of the embodiments of the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. is defined with respect to the orientation or position in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. It can change accordingly with the change of the orientation in which the components in the drawings are placed, and thus cannot be understood as a limitation to the present application.

[0033] In the embodiments of the present application, the same reference numeral is used to represent the same component or the same part. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that the reference numeral also applies to other identical parts or components. In addition, the components in the drawings are not drawn to scale, and the dimensions and sizes of the components shown in the drawings are only exemplary and should not be understood as a limitation to the present application.

[0034] A transparent display screen means that the screen has a certain degree of transparency. While maintaining the transparency of the screen, it can also display the color and details of the picture presented on the screen itself. Therefore, a transparent display screen allows users to see the background content behind the screen through the screen, and also allows users to see the displayed content on the screen.

[0035] In addition, as an emerging display technology, transparent displays have unique hardware transparency characteristics, which can achieve visual overlay effects. They have been widely used in commercial displays, advertising, smart homes and other fields.

[0036] However, while displaying content, transparent displays need to maintain the transparency of the overall hardware so that objects behind the screen are visible. This design feature makes transparent displays susceptible to the influence of ambient light from different directions and intensities in situations where the lighting environment is complex and changeable. Especially in strong light environments, the brightness of the ambient light is often much higher than the brightness of the screen display, resulting in a significant decrease in the contrast of the content displayed on the screen. This makes it difficult for viewers to distinguish the details on the screen, affecting the viewing experience.

[0037] In view of this, an embodiment of the present application proposes an optical device, which can be applied to the above-mentioned transparent display screen and deployed under the light-emitting layer of the transparent display screen (that is, located on the side of the light-emitting layer away from the CG of the transparent display screen). The geometric parameters of the optical device are the same as or similar to the geometric parameters of the light-emitting layer, and the optical device includes multiple partitions, and the transparency of each partition is adjustable. For example, if it is necessary to reduce the interference of ambient light in a certain partition, then the optical device can lower the transparency of the partition to resist the interference of ambient light, so that the user can distinguish the details of the picture corresponding to the partition while watching the background content behind the screen.

[0038] Figure 1 It is a schematic diagram of the structure of an optical device 100 proposed in an embodiment of the present application.

[0039] refer to Figure 1 As shown, the optical device 100 is applied to a display panel, the display panel is covered by CG, the display panel includes a light-emitting layer 210, and the optical device 100 includes N film layer structures 110, N is greater than 1, and the N film layer structures 110 are closely arranged on the side of the light-emitting layer away from the CG (i.e., on the side of the light-emitting layer 210). Figure 1 , located below the light-emitting layer 210), wherein the transparency of the film layer structure 110 is related to the voltage value applied to the film layer structure 110.

[0040] In some possible embodiments, reference Figure 1 As shown, the above-mentioned film layer structure 110 includes:

[0041] A first electrode layer 111;

[0042] The first material layer 113 is located on the side of the first electrode layer 111 close to the CG (in Figure 1 , above the first electrode layer 111). The first material layer 113 includes a first material, and the first material is an anode electrochromic material;

[0043] The second material layer 115 is located on the side of the first material layer 113 close to the CG (in Figure 1 , above the first material layer 113). The second material layer 115 includes a second material, and the second material is a cathode electrochromic material;

[0044] The second electrode layer 117 is located on the side of the second material layer 115 close to the CG (in Figure 1 , above the second material layer 115).

[0045] In some possible embodiments, the above-mentioned first material may include NiO, and the second material may include WO3.

[0046] It should be understood that the reason for using two material layers in the embodiments of the present application is that the materials of these two material layers are different. For example, the above-mentioned NiO and WO3 have their own advantages in electrochromic performance. For example, NiO has a faster response speed, while WO3 has a higher coloring efficiency. Combining them can make full use of their respective advantages, achieve complementary and optimized performance, and help improve the conversion efficiency of the transparency of the optical device 100.

[0047] In some possible embodiments, the above-mentioned first material may further include oxides or hydrates of metals belonging to Group VI and the Pt group such as platinum (Pt), iridium (Ir), palladium (Pd), rhodium (Rh), ruthenium (Ru), etc. The above-mentioned second material may further include WO3, molybdenum oxide (MoO3), a mixed material of WO3 and MoO3, vanadium pentoxide (V2O5), niobium pentoxide (Nb2O5), titanium dioxide (TiO2), etc.

[0048] It should be understood that the first material is an anode electrochromic material, and the color change process of the anode electrochromic material usually involves the change of the valence state of metal ions in the material. When a positive voltage is applied, cations and electrons are injected into the material, resulting in an increase in the valence state of metal ions and the material being colored; conversely, when a negative voltage is applied, cations and electrons are extracted, the valence state of metal ions decreases, and the material fades.

[0049] In addition, the second material is a cathode electrochromic material, and the color change process of the cathode electrochromic material also involves the migration of ions and electrons. When a negative voltage is applied, cations and electrons are simultaneously injected into the material, causing the material to be reduced and colored; conversely, when a positive voltage is applied, cations and electrons are extracted, and the material is oxidized and faded.

[0050] In some possible embodiments, the transparency of the first material layer 113 and the second material layer 115 is related to the voltage value applied across the first electrode layer 111 and the second electrode layer 117. This is because both the first material and the second material are electrochromic materials, and electrochromic materials will undergo an electrochemical oxidation-reduction reaction under the action of an external electric field. The electric field is formed based on the voltage applied between the first electrode layer 111 and the second electrode layer 117. After the electrochromic material undergoes an electrochemical oxidation-reduction reaction, the transparency of the electrochromic material will change.

[0051] Figure 2 It is a schematic diagram showing the relationship between the transparency and voltage of an electrochromic material applicable to the embodiments of the present application.

[0052] The above Figure 2 can be used to represent the relationship between the transparency and voltage of the above-mentioned NiO and WO3 materials, where the voltage refers to the voltage applied across the first electrode layer 111 and the second electrode layer 117. Referring to Figure 2 as shown, during the process of gradually increasing the voltage value from 0, there is an obvious upward trend in the transparency of the material. After the voltage value is greater than a certain threshold, the transparency of the material will show a downward trend, and the downward trend tends to be gentle. Based on this characteristic, the adjustment of the transparency of the film layer structure 110 can be achieved. Of course, for other electrochromic materials, there is also a similar Figure 2 relationship between transparency and voltage as shown.

[0053] It should be understood that if the optical device 100 includes N film layer structures 110, then by applying voltage signals with different voltage values to different film layer structures 110, a display effect with different transparencies for different film layer structures 110 can be achieved.

[0054] Exemplarily, the N film layer structures 110 can be divided into two parts, namely the first part and the second part. Suppose a first voltage signal is input to the first electrode layer 111 of the film layer structure 110 in the first part, and a second voltage signal is input to the first electrode layer 111 of the film layer structure 110 in the second part, and the voltage value of the first voltage signal is different from the voltage value of the second voltage signal. Then these two parts of the film layer structure 110 each have different transparencies.

[0055] It can be seen therefrom that the voltage signals of each of the N film layer structures 110 input can be independently controlled through a control circuit, and the transparency of up to N film layer structures 110 can be made different from each other. For the structural description of the optical device 100 including the control circuit, please refer to the subsequent embodiments.

[0056] In some possible embodiments, since the optical device 100 proposed in the embodiments of the present application is applied to the scenario of transparent display, it is necessary to ensure that each structural layer of the optical device 100 is transparent or has the light-transmitting property of being converted into transparent or semi-transparent. Based on the foregoing embodiments, it can be known that both the first material layer 113 and the second material layer 115 in the film layer structure 110 are transparent materials. Then, the materials of the first electrode layer 111 and the second electrode layer 117 may be transparent conductive oxides (TCO).

[0057] In some possible embodiments, the TCO applied to the first electrode layer 111 and the second electrode layer 117 may be indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO), or the like.

[0058] In some possible embodiments, for different display panels, the structure of the light-emitting layer 210 also corresponds differently. When the display panel is an organic light-emitting diode (OLED) screen, the light-emitting layer 210 is an organic light-emitting layer formed by an OLED-based pixel array, and the N film layer structures 110 may be disposed under the organic light-emitting layer (i.e., on the side of the organic light-emitting layer away from the CG); when the display panel is a liquid crystal display (LCD), the light-emitting layer 210 includes a light guide plate (LGP) 211 and a side light source 212. Figure 1 The light-emitting layer 210 shown is the light-emitting layer in the LCD, where the side light source may be a light-emitting diode (LED) light source. Refer to Figure 1 as shown (the dotted part), and nano-diffusion particles are injected into the LGP 211 (by Figure 1When light enters the LGP 211 and encounters these nano-diffusing particles, light scattering occurs, which changes the direction of the light from straight-line propagation to scattering in all directions. The light scattered on the upper surface of the light guide plate can be used as the backlight of the LCD. The N film layer structures 110 can be deployed under the light guide plate (i.e., on the side of the light guide plate away from the CG).

[0059] It should be noted that the above Figure 1 It only shows the positional relationship between the various structural layers, for example, Figure 1 Although any two upper and lower structural layers in the figure are in contact, in the actual device structure, there may be Figure 1 Other structural layers not shown in the figure, Figure 1 It is only used to indicate the upper and lower positional relationship between the two structural layers. In addition, the upper surface or lower surface of the light-emitting layer 210 mentioned in the embodiment of the present application refers to the placement state of the light-emitting layer 210 in the corresponding figure, or in the embodiment of the present application, the surface of the light-emitting layer 210 for emitting backlight is defined as the upper surface, and the surface opposite to the optical device 100 is defined as the lower surface.

[0060] Based on the above technical solution, by arranging a plurality of optical devices 100 proposed in the embodiment of the present application under the light-emitting layer 210 of the display panel, and the transparency of the first material layer 113 and the second material layer 115 in the plurality of optical devices 100 can change with the magnitude of the applied voltage, it is possible to control the transparency of some optical devices 100 by voltage in a strong light environment, thereby increasing the performance of the display area (also referred to as the area of interest) corresponding to this part of the optical device 100 against ambient light interference, so that the user can distinguish the details of the corresponding picture in the area while also viewing the background content behind the screen. For the area where the transparency is not reduced, the background content behind the screen can also be viewed more clearly. While ensuring the visual experience of the user viewing the screen, it is possible to provide the user with as much relevant content from the screen and from behind the screen as possible, thereby improving the user's experience.

[0061] In some possible embodiments, reference Figure 1 As shown, the film structure 110 proposed in the embodiment of the present application may further include: a conductive layer 114, the conductive layer 114 is located between the first material layer 113 and the second material layer 115, the conductive layer 114 includes a transparent viscous electrolyte. The conductive layer 114 may also be referred to as an ion conductive layer 114.

[0062] It should be understood that the above-mentioned transparent viscous electrolyte refers to a substance that can conduct electricity under specific conditions while maintaining transparent and viscous properties.

[0063] In some possible embodiments, the above-mentioned transparent viscous electrolyte may include: polymethyl methacrylate (PMMA)-based gel electrolyte, polyacrylic acid (PAA)-based gel electrolyte, polyvinyl alcohol (PVA)-based gel electrolyte, etc.

[0064] It should be understood that the transparent viscous electrolyte has good conductivity, which helps the migration of ions under the action of an electric field, thereby participating in the redox reaction of the electrochromic material. Moreover, the transparent viscous electrolyte also has good transparency. Since electrochromic devices usually need to work in a transparent state, the electrolyte layer must have high transparency to ensure that light can pass through smoothly without affecting the visual effect of the device. In addition, the transparent viscous electrolyte also has good chemical stability to resist corrosion and degradation in the environment, thereby ensuring the long-term stability and reliability of the device.

[0065] In some possible embodiments, an ion storage layer may also be provided between the above-mentioned conductive layer 114 and the first material layer 113 or between the above-mentioned conductive layer 114 and the second material layer 115. The ion storage layer can be used to store the ions migrated out of the electrochromic layer, and the ion storage layer can be composed of a material with properties opposite to those of the electrochromic material to maintain the charge balance inside the optical device 100.

[0066] Based on the above technical solution, by providing a conductive layer 114 based on a transparent viscous electrolyte between the first material layer 113 and the second material layer 115, the migration efficiency of the ions in the first material layer 113 and the second material layer 115 under the action of an electric field can be effectively promoted, thereby increasing the efficiency of the optical device 100 in changing transparency.

[0067] Figure 3 It is a schematic structural diagram of another optical device 100 proposed in the embodiments of the present application.

[0068] Considering that the light scattered outward from the inside of the light-emitting layer 210 may exit from the lower surface of the light-emitting layer 210, and this part of the light exiting from the lower surface of the light-emitting layer 210 cannot be used as the backlight of the display device. In view of this, the embodiments of the present application further propose an optical device 100.

[0069] Refer to Figure 3 As shown, compared with Figure 1 the optical device 100 shown, Figure 3The film layer structure 110 of the optical device 100 shown also includes: a reflective layer 118, which is located between the second electrode layer 117 and the light-emitting layer. Reflective particles are injected into the reflective layer 118, and the reflective particles are used to reflect the light from the light-emitting layer 210 back to the light-emitting layer 210.

[0070] Exemplarily, taking an LCD as an example, when the light incident on the reflective layer encounters the reflective particles, it can be reflected back to the LGP 211 by the reflective particles. The reflected light can directly exit from the upper surface of the light-emitting layer 210 in the light-emitting layer 210, or the reflected light can also encounter nano-diffusion particles in the light-emitting layer 210 and be scattered by the nano-diffusion particles so that the light can exit from the upper surface of the light-emitting layer 210.

[0071] In some possible embodiments, the above-mentioned reflective layer 118 is made of a transparent material, such as a transparent plastic material.

[0072] In some possible embodiments, the material of the above-mentioned reflective layer 118 can be the same as that of the light-emitting layer 210. Taking an LCD as an example, when the material of the LGP 211 is polyethylene terephthalate (PET), the material of the reflective layer 118 can also be PET; of course, the material of the above-mentioned reflective layer 118 can also be different from that of the light-emitting layer 210. Still taking an LCD as an example, when the material of the LGP 211 is PMMA or polycarbonate (PC). Similarly, for an OLED screen, since the material of the light-emitting layer of the OLED screen usually has the characteristic of self-luminescence, in view of this, the reflective layer 118 is not a material with self-luminescence characteristics, and the reflective layer 118 can still be the above-mentioned transparent materials such as PET.

[0073] Based on the above technical solution, the reflective particles in the reflective layer 118 located below the light-emitting layer 210 intercept the light emitted from the lower surface of the light-emitting layer 210, so that the light can be reflected back into the light-emitting layer 210 after encountering the reflective particles, so that as much light as possible exits from the upper surface of the light-emitting layer 210 to serve as the backlight of the display panel, thereby increasing the display light efficiency of the transparent display screen and helping to increase the performance of the transparent display screen to resist ambient light interference.

[0074] In some possible embodiments, the above-mentioned reflective particles are uniformly distributed in the reflective layer 118.

[0075] Based on the above technical solution, it is possible to avoid the situation where some parts of the reflective layer 118 have strong light reflection ability and some parts have poor light reflection ability, and the uniformly distributed reflective particles are more likely to intercept the light from the light-emitting layer 210.

[0076] In some possible embodiments, the above-mentioned reflective particles include at least one of the following substances: metal oxides, SiO2, polymer particles, etc.

[0077] In some possible embodiments, the diameter of the above-mentioned reflective particles is in the range of [10 nm, 30 nm].

[0078] It should be understood that when the optical device 100 is in different application scenarios, the range of the above diameter range can be adaptively adjusted.

[0079] In some possible embodiments, the diameter of the above-mentioned reflective particles can also be the same as or close to the diameter of the nano-diffusion particles distributed in the light-emitting layer 210.

[0080] In some possible embodiments, the size parameters between the respective reflective particles injected into the reflective layer 118 can be inconsistent.

[0081] In some possible embodiments, the concentration of the reflective particles in the above-mentioned reflective layer 118 is in the range of [30%, 40%].

[0082] Among them, the above-mentioned reflective particle concentration can be determined by the ratio between the volume of all reflective particles and the volume of the reflective layer 118.

[0083] It should be understood that when the optical device 100 is in different application scenarios, the range of the above particle concentration range can be adaptively adjusted.

[0084] In some possible embodiments, a layer of substrate can also be provided under the above-mentioned first electrode layer 111 (i.e., on the side of the first electrode layer 111 away from the CG) to protect the film layer structure 110.

[0085] Figure 4 is a schematic structural diagram of another optical device 100 proposed in the embodiments of the present application. Compared with Figure 1 or Figure 3 the optical device 100 shown, Figure 4 the optical device 100 shown in also includes: a control circuit 120, which is connected to N film layer structures 110, and the control circuit 120 is configured to input voltage signals corresponding to the N film layer structures 110 to control the transparency of the N film layer structures 110. Among them, when there are multiple voltage signals for inputting the N film layer structures 110, the multiple voltage signals can be the same, or can be partially the same, or can be different from each other.

[0086] Exemplarily, assume that when the input voltage signals of N film layer structures 110 correspond to N, then when the N voltage signals are the same, the transparencies of the display areas corresponding to the N film layer structures 110 are the same; when a part of the N voltage signals correspond to a first voltage value and another part of the voltage signals correspond to a second voltage value, then the transparencies of the two display areas corresponding to these two parts of the film layer structures 110 are different. And so on.

[0087] In some possible embodiments, the above control circuit 120 includes two voltage output terminals, namely the anode terminal and the cathode terminal. The control circuit 120 outputs corresponding voltage signals by controlling the voltage drop between these two voltage output terminals, and applies them across the first electrode layer 111 and the second electrode layer 117 of the film layer structure 110. Among them, the anode terminal of the control circuit 120 is electrically connected to the first electrode layer 111, and the cathode terminal of the control circuit 120 is electrically connected to the second electrode layer 117.

[0088] It should be understood that the control circuit 120 is electrically connected to other conductive structures, and the current is transmitted into the film layer structure 110 through the conductive structures, so as to form a corresponding voltage across the film layer structure 110.

[0089] In some possible embodiments, since the above control circuit 120 is connected to N film layer structures 110, the control circuit 120 can separately control each film layer structure 110 and apply corresponding voltages to each film layer structure 110, so that each film layer structure 110 can adjust its transparency. Thus, it can be seen that by separately controlling the voltages applied across each film layer structure 110, the control circuit 120 can enable the transparent display screen to have multiple transparency partition division methods, so that the transparencies between the divided multiple partitions are different.

[0090] Figure 5 It is a schematic diagram of transparency partitioning implemented based on the optical device 100 proposed in an embodiment of the present application. Among them, the devices inside the display panel are all represented by dotted lines.

[0091] Reference Figure 5 As shown, the transparent display screen is divided into two display partitions. The transparency of the left partition is significantly lower than that of the right partition. Thus, it can be seen that the voltages applied by the control circuit 120 to the M film layer structures 110 corresponding to the left partition are different from the voltages applied to the K film layer structures 110 corresponding to the right partition. At this time, M + K = N.

[0092] Figure 6 It is another schematic diagram of transparency partitioning implemented based on the optical device 100 proposed in an embodiment of the present application. Among them, the devices inside the display panel are all represented by dotted lines.

[0093] Reference Figure 6As shown in the figure, the transparent display screen is divided into four display partitions. Among them, the transparency of the first partition is the highest, the transparency of the second partition is lower, the transparency of the third partition is even lower, and the transparency of the fourth partition is the lowest. Thus, it can be seen that the voltages applied by the control circuit 120 to the G film layer structures 110 corresponding to the first partition, the H film layer structures 110 corresponding to the second partition, the I film layer structures 110 corresponding to the third partition, and the J film layer structures 110 corresponding to the fourth partition are different. At this time, G + H + I + J = N.

[0094] The same principle applies to other partition situations, and no more details will be listed here.

[0095] Based on the above technical solution, the control circuit 120 is electrically connected to the N film layer structures 110, so as to realize the individual control of the transparency of the N film layer structures, enabling the transparent display screen to have multiple transparency partition division methods, and the transparency between each partition can be different, increasing the flexibility of transparency adjustment of the transparent display screen.

[0096] The embodiment of the present application also proposes a backlight panel, and this backlight panel can refer to Figure 1 As shown in the figure, this backlight panel is applied to an LCD. This backlight panel includes the above-mentioned light-emitting layer 210 and any one of the optical devices 100 proposed in the embodiment of the present application. Among them, the light-emitting layer 210 includes an LGP 211 and a side light source 212.

[0097] The embodiment of the present application also proposes a display panel.

[0098] Figure 7 It is a schematic diagram of a display panel 700 proposed in the embodiment of the present application. This display panel 700 is applied to an LCD.

[0099] Refer to Figure 7 As shown in the figure, this display panel 700 includes: a liquid crystal layer 710, a light-emitting layer 210, and any one of the optical devices 100 proposed in the embodiment of the present application. The liquid crystal layer 710 is located above the light-emitting layer 210 (i.e., on the side of the light-emitting layer 210 close to the CG), and the light-emitting layer 210 is simultaneously located above the optical device 100 (i.e., on the side of the optical device 100 close to the CG).

[0100] It should be understood that since the display panel 700 in this example is applied to an LCD, in this display panel 700, the light-emitting layer 210 and the optical device 100 are used to form the backlight panel of this display panel 700.

[0101] In some possible embodiments, Figure 7The shown liquid crystal layer 710 is used to implement the twisted nematic (TN) display mode of the LCD. The elliptical distribution form in the liquid crystal layer 710 is used to represent the distribution form of the liquid crystal. Based on this distribution form, the liquid crystal can implement the TN display mode of the LCD. Of course, in practical applications, the above LCD can also be changed to other modes, such as the in-plane switching (IPS) mode, etc. And these are what those skilled in the art can think of based on obtaining the technical solutions mentioned in the embodiments of the present application. Therefore, applying the technical solutions of the embodiments of the present application to other mode LCDs or OLED screens also falls within the protection scope of the embodiments of the present disclosure.

[0102] The embodiments of the present application also propose a display device, which includes any one of the display panels 700 proposed in the embodiments of the present application. It should be understood that the display device includes a transparent display screen.

[0103] It should be understood that since the optical device 100 proposed in the embodiments of the present application can adjust the transparency of the N film layer structures 110 included in the optical device 100, and the transparency of the film layer structure 110 is closely related to the voltage applied to both poles of the film layer structure 110, the embodiments of the present application propose a voltage control method to control the voltages applied to both poles of each film layer structure 110 respectively, so as to realize the overall or multi-zone transparency adjustment of the transparent display screen applying the embodiments of the present application.

[0104] Figure 8 It is a schematic flowchart of a voltage control method 800 proposed in the embodiments of the present application.

[0105] This method 800 is applied to the optical device 100 proposed in the embodiments of the present application. This method 800 can be executed by the control circuit 120 mentioned in the above embodiments. Further, this method 800 can be executed by the corresponding functional module integrated in the control circuit 120. This method 800 includes the following steps:

[0106] S810: Receive first indication information, which is used to indicate that the first partition of the display panel is adjusted to the first transparency. The first partition corresponds to M film layer structures in the optical device, and M is less than or equal to N.

[0107] In some possible embodiments, this S810 can be executed by the receiving unit integrated in the above control circuit 120.

[0108] In some possible embodiments, since the above-mentioned first indication information can indicate that the first partition of the display panel is adjusted to a first transparency, the above-mentioned first indication information may include the coordinates of multiple reference points on the edge of the first partition and the numerical information corresponding to the first transparency. Among them, the coordinates may be coordinates in a coordinate system established based on the display panel, and the numerical information corresponding to the first transparency may be a percentage value. For example, 100% is used to represent completely transparent, and 0% is used to represent completely opaque, etc.

[0109] In some possible embodiments, the above-mentioned first indication information for indicating that the first partition of the display panel is adjusted to a first transparency may be a part of all the content indicated by the first indication information. The above-mentioned first indication information may also be used to indicate the transparency corresponding to other partitions at the same time.

[0110] In some possible embodiments, the above-mentioned first indication information may also be only used to indicate that the first partition of the display panel is adjusted to a first transparency. However, at the same time, other indication information, such as the second indication information, may be received. The second indication information may be used to indicate that other partitions of the display panel are adjusted to corresponding transparencies.

[0111] In some possible embodiments, the above-mentioned first indication information may be generated by the display device in response to a user operation. For example, the user operation is to set the first partition to the first transparency through a user graphical interface, etc.

[0112] In some possible embodiments, when the display device is connected to other optical sensors, the display device (such as a built-in processor, etc.) can also determine, based on the sensing information sent by the optical sensors, that the first partition is the first transparency by itself. The sensing information may include information such as the light intensity (or called illumination intensity) distribution of the light irradiated on the display panel, so that the display device can determine the display partitions (including the first partition) and the transparency corresponding to each display partition (including the first transparency). It should be understood that there is a corresponding relationship between the transparency of the display partition and the light intensity irradiated on the display partition. This corresponding relationship can be obtained through a pre-experiment method and can be stored in the display device.

[0113] S820: Determine the first voltage value according to the first transparency.

[0114] In some possible embodiments, the S820 may be executed by the processing unit integrated in the above-mentioned control circuit 120.

[0115] In some possible embodiments, based on the foregoing embodiments, it can be known that since there is a corresponding relationship between the transparency of the film layer structure (i.e., two material layers) and the voltage applied to the film layer structure, for example Figure 2Schematic diagram of the corresponding relationship shown. This corresponding relationship can be obtained through pre-experimentation and stored in the corresponding function module integrated in the above control circuit, such as a memory. This corresponding relationship can be represented in the form of a relationship table or by corresponding correlation functions.

[0116] S830: Send a first voltage signal to M film layer structures, and this first voltage signal is used to control the voltage value applied across the first electrode layer and the second electrode layer in the M film layer structures to be a first voltage value.

[0117] In some possible embodiments, S830 can be executed by the sending unit integrated in the above control circuit 120.

[0118] It should be understood that since the first voltage value corresponds to the first transparency, after applying a voltage of the first voltage value across the first electrode layer and the second electrode layer in the M film layer structures, the transparency of the two material layers in the M film layer structures can be changed to the first transparency. Additionally, since the M film layer structures correspond to the above first partition, the transparency of the first partition is finally adjusted to the first transparency.

[0119] In some possible embodiments, if the film layer structure is not powered on, the transparency of the material layer of the film layer structure is in its natural state. The transparency of the material layer in its natural state can be completely transparent, completely opaque, or semi-transparent.

[0120] Correspondingly, an embodiment of the present application also proposes a voltage control device, which includes a processor and a memory. Among them, the processor and the memory are connected. The memory is used to store program code, and the processor is used to call the program code to execute any one of the voltage control methods 800 proposed in the embodiments of the present application.

[0121] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0122] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0123] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0124] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0125] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0126] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0127] As described above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical device, characterized in that, Applied to a display panel, the display panel is covered by a cover glass CG, the display panel includes a light-emitting layer, the optical device includes N film layer structures (110), N is greater than 1, the N film layer structures (110) are closely arranged on a side of the light-emitting layer facing away from the CG, and the transparency of the film layer structure (110) is related to the voltage value applied to the film layer structure (110).

2. The optical device according to claim 1, characterized in that, The film layer structure (110) includes: A first electrode layer (111); A first material layer (113), the first material layer (113) is located on a side of the first electrode layer (111) close to the CG, the first material layer (113) includes a first material, and the first material is an anodic electrochromic material; A second material layer (115), the second material layer (115) is located on a side of the first material layer (113) close to the CG, the second material layer (115) includes a second material, and the second material is a cathodic electrochromic material; A second electrode layer (117), the second electrode layer (117) is located on a side of the second material layer (115) close to the CG.

3. The optical device according to claim 2, characterized in that, The transparency of the first material layer (113) and the second material layer (115) is related to the voltage value applied across the two ends of the first electrode layer (111) and the second electrode layer (117).

4. The optical device according to claim 2 or 3, characterized in that, The film layer structure (110) further includes: A reflective layer (118), the reflective layer (118) is located between the second electrode layer (117) and the light-emitting layer, and reflective particles are injected into the reflective layer (118), and the reflective particles are used to reflect the light from the light-emitting layer back to the light-emitting layer.

5. The optical device according to claim 2 or 3, characterized in that, The film layer structure (110) further includes: A conductive layer (114), the conductive layer (114) is located between the first material layer (113) and the second material layer (115), and the conductive layer (114) includes a transparent viscous electrolyte.

6. The optical device according to any one of claims 1 to 3, characterized in that The optical device further includes: A control circuit (120), the control circuit (120) is connected to the N film layer structures (110), and the control circuit (120) is configured to input voltage signals corresponding to the N film layer structures (110).

7. The optical device according to claim 2 or 3, characterized in that, The first material includes nickel oxide NiO, and the second material includes tungsten oxide WO3.

8. The optical device according to claim 4, characterized in that, The reflective particles are uniformly distributed in the reflective layer (118).

9. The optical device according to claim 4, characterized in that, The reflective layer (118) is a transparent material, the reflective particles are metal oxides, silicon dioxide SiO2 or polymer particles, and the diameter of the reflective particles is in the range of [10nm, 30nm].

10. The optical device according to claim 2 or 3, characterized in that, The first electrode layer (111) and the second electrode layer (117) include transparent conductive oxides.

11. A backlight panel, characterized in that, Including a light guide plate, a side light source, and the optical device according to any one of claims 1 to 10.

12. A display panel, characterized in that, Including a light-emitting layer and the optical device according to any one of claims 1 to 10, or including the backlight panel according to claim 11.

13. A display device, characterized in that, Including the display panel according to claim 12.

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