CN112652648B - Display panel, control method thereof and display device - Google Patents
Display panel, control method thereof and display device Download PDFInfo
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- CN112652648B CN112652648B CN202011508196.7A CN202011508196A CN112652648B CN 112652648 B CN112652648 B CN 112652648B CN 202011508196 A CN202011508196 A CN 202011508196A CN 112652648 B CN112652648 B CN 112652648B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
Abstract
The invention discloses a display panel, a control method thereof and a display device. The display panel includes: a base assembly; the adhesive tape layer is positioned on one side of the substrate assembly and comprises a first opening; the driving array layer is positioned on one side of the substrate component, which is away from the adhesive tape layer; a light emitting element layer located on a side of the driving array layer facing away from the substrate assembly; and the electronic control light valve component is positioned on one side of the driving array layer, which is away from the light-emitting element layer, and covers the first opening through orthographic projection of the electronic control light valve component on the adhesive tape layer, and the electronic control light valve component can adjust light transmittance according to the received electric signal. According to the display panel provided by the embodiment of the invention, when the first opening of the display panel corresponds to the area for displaying the picture, the light transmittance of the electric control light valve component can be reduced, so that the reflected light rays received by the driving array layer of the area are reduced, and the display brightness difference of the area and other areas is reduced.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a control method thereof and a display device.
Background
An Active Matrix (AM) driving technology is a display driving technology for controlling each pixel to emit light by using a thin film transistor (Thin Film Transistor, TFT) array, and in a display panel driven in an AM manner, each pixel independently operates and continuously drives, and has advantages of low driving voltage, low power consumption, long service life, and the like.
The display panel is positioned on the adhesive tape layer on one side of the substrate assembly, and the adhesive tape layer comprises a first opening. The display panel is in the area corresponding to the first opening and can be multiplexed into multiplexing areas with optical functions such as fingerprint identification, image acquisition and the like. At this time, the display panel has a significant brightness difference between the region corresponding to the first opening and other regions when displaying, and a significant bright-dark display uneven phenomenon is visually generated.
Disclosure of Invention
The invention provides a display panel, a control method thereof and a display device, and the stability of the display panel and a substrate during binding connection is improved.
In a first aspect, an embodiment of the present invention provides a display panel, including: a base assembly; the adhesive tape layer is positioned on one side of the substrate assembly and comprises a first opening; the driving array layer is positioned on one side of the substrate component, which is away from the adhesive tape layer; a light emitting element layer located on a side of the driving array layer facing away from the substrate assembly; and the electronic control light valve component is positioned on one side of the driving array layer, which is away from the light-emitting element layer, and covers the first opening through orthographic projection of the electronic control light valve component on the adhesive tape layer, and the electronic control light valve component can adjust light transmittance according to the received electric signal.
According to a further embodiment of the first aspect of the invention, the electrically controlled light valve assembly is located on a side of the substrate assembly facing away from the driving array layer.
According to any of the foregoing embodiments of the first aspect of the present invention, the electrically controlled light valve assembly comprises an electrochromic assembly comprising: the first light-transmitting electrode and the second light-transmitting electrode are oppositely arranged in the direction perpendicular to the substrate assembly; and an electrochromic film sandwiched between the first light-transmitting electrode and the second light-transmitting electrode.
According to any of the foregoing embodiments of the first aspect of the present invention, the electrochromic film is capable of transitioning between a transparent state and a colored state of the same color as the tape layer in response to an electrical signal received by the electrochromic assembly.
According to any of the foregoing embodiments of the first aspect of the present invention, the electronically controlled light valve assembly comprises a liquid crystal light valve assembly comprising: a liquid crystal cell; the first polaroid is positioned at one side of the liquid crystal box away from the light-emitting element layer; and a second polarizer located at one side of the liquid crystal cell facing the light emitting element layer.
According to any of the foregoing embodiments of the first aspect of the present invention, the liquid crystal cell is a twisted nematic liquid crystal cell, and the transmission axis of the first polarizer is orthogonal to the transmission axis of the second polarizer.
According to any of the foregoing embodiments of the first aspect of the invention, the electronically controlled light valve assembly comprises at least one of an opto-electronic switch, or a magneto-optical switch.
In a second aspect, an embodiment of the present invention provides a control method for controlling a display panel according to any one of the foregoing embodiments of the first aspect of the present invention, the control method including: in a first mode, receiving first information through the electronic control light valve assembly, so that the electronic control light valve assembly has first light transmittance; in the second mode, the second information is received by the electronic control light valve assembly, so that the electronic control light valve assembly has a second light transmittance, wherein the second light transmittance is greater than the first light transmittance.
According to any of the foregoing embodiments of the second aspect of the present invention, an electronically controlled light valve assembly comprises an electrochromic assembly comprising an electrochromic film, the control method comprising: in a first mode, receiving first information through the electrochromic assembly, so that the electrochromic film is in a colored state with the same color as the adhesive tape layer; in a second mode, second information is received through the electrochromic assembly such that the electrochromic film is in a transparent state.
In a third aspect, an embodiment of the present invention provides a display device, including: a display panel according to any one of the preceding embodiments of the first aspect of the present invention; and the photosensitive element is positioned on one side of the electric control light valve component of the display panel, which is away from the light emitting element layer.
According to the display panel of the embodiment of the invention, the adhesive tape layer is positioned on one side of the substrate assembly, and the adhesive tape layer comprises the first opening. The display panel may include a first region corresponding to the first opening and a second region disposed around at least a portion of the first region. In general, the adhesive tape layer is a light absorbing layer, at this time, more reflected light is generated at the interface between the substrate component of the first area and the air at the first opening due to the difference of refractive indexes, and less reflected light is generated at the substrate component of the second area due to the existence of the adhesive tape layer, so that the irradiation amount of the reflected light received by the driving array layer of the first area is different from the irradiation amount of the reflected light received by the driving array layer of the second area, and the device characteristics of the first area are different from the device characteristics of the second area. In the embodiment of the invention, the front projection of the electric control light valve component on the adhesive tape layer covers the first opening, and the electric control light valve component can adjust the light transmittance according to the received electric signal. When the first area of the display panel is used for photosensitive multiplexing, the light transmittance of the electric control light valve assembly can be improved, and smooth receiving of the light passing through the first area by the photosensitive element is realized; when the first area of the display panel displays a picture, the light transmittance of the electronic control light valve assembly can be reduced, so that the reflected light rays received by the driving array layer of the first area are reduced, and the display brightness difference of the first area and the second area is reduced.
In some optional embodiments, the electronic control light valve component is located at one side of the substrate component, which is away from the driving array layer, so that the electronic control light valve component can be integrally arranged at one side of the substrate component after the driving array layer, the light emitting element layer and the like of the display panel are manufactured, the integration difficulty of the electronic control light valve component in the display panel is reduced, and the manufacturing efficiency of the display panel with the electronic control light valve component is improved.
In some alternative embodiments, the electrically controlled light valve assembly includes an electrochromic assembly including a first transparent electrode, a second transparent electrode, and an electrochromic film, and the electrically controlled light valve assembly is thinner in thickness, so as to facilitate light and thin display panels.
In some alternative embodiments, the electrochromic film is capable of transitioning between a transparent state and a colored state of the same color as the tape layer, based on an electrical signal received by the electrochromic assembly. When the electrochromic film is in a transparent state, the whole light transmission performance of the display panel in the area corresponding to the first opening can be improved. When the electrochromic film is in a colored state, the absorptivity and reflectivity of the electrochromic film to light tend to be consistent with those of the adhesive tape layer, so that the reflected light received by the driving array layers at all positions of the display panel tend to be consistent, and the uniformity of the display brightness of the display panel is improved.
In some alternative embodiments, the electrically controlled light valve assembly includes a liquid crystal light valve assembly, wherein the liquid crystal cell is a twisted nematic liquid crystal cell, and a light transmission axis of the first polarizer is orthogonal to a light transmission axis of the second polarizer, so that the electrically controlled light valve assembly has stronger light transmission capability in a light-permeable state, and improves luminous flux that can be received by a photosensitive element on a back side of the display panel, and improves a photosensitive effect.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a schematic cross-sectional view of an electronically controlled light valve assembly of a display panel provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an electronically controlled light valve assembly of a display panel provided in accordance with an alternative embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a display device provided according to one embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a display panel provided in accordance with an embodiment of the present invention in a first mode when combined with a photosensitive element;
fig. 7 is a schematic cross-sectional view of a display panel combined with a photosensitive element according to an embodiment of the present invention in a second mode.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
Embodiments of the present invention provide a display panel, wherein the display panel may be an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel. The display panel may be combined with photosensitive means for functions such as optical fingerprint recognition means, image acquisition means, etc. The display panel of the embodiments of the present invention may be presented in various forms, some examples of which will be described below.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of fig. 1 in A-A direction. The display panel 100 includes a substrate assembly 110, a tape layer 120, a driving array layer 130, a light emitting element layer 140, and an electrically controlled light valve assembly 170.
Alternatively, the base assembly 110 may include a substrate 111 and a support layer 112. The support layer 112 may be located at one side of the substrate 111. The substrate 111 is a light-transmitting layer. The substrate 111 may be a single-layer structure, which may be a rigid substrate 111 such as a glass layer, or may be a flexible substrate 111 such as a Polyimide (PI) layer. The substrate 111 may also be a composite layer, i.e. it may comprise a plurality of sub-layers arranged in layers, wherein the sub-layers may be organic layers such as PI layers, or inorganic layers such as silicon oxide (SiO) layers, silicon nitride (SiN) layers. The support layer 112 is a light-transmitting layer, for example made of polyethylene terephthalate (Polyethylene terephthalate, PET). Optionally, the base assembly 110 further comprises a buffer layer, which is located on the side of the substrate 111 facing away from the support layer 112, and which may comprise at least one inorganic layer such as a silicon oxide layer, a silicon nitride layer.
The tape layer 120 is located on one side of the base assembly 110. The tape layer 120 may be a colored layer. For example, the tape layer 120 may be a black tape layer, and in other embodiments, the tape layer 120 may be a yellow, orange, or other color tape layer. The tape layer 120 includes a first opening 121. The display panel may include a first area DA1 corresponding to the first opening 121 and a second area DA2 surrounding at least a portion of the first area DA 1.
The drive array layer 130 is located on a side of the substrate assembly 110 facing away from the tape layer 120. In this embodiment, the OLED display panel 100 is an Active Matrix (AM) OLED display panel 100, which uses a thin film transistor (Thin Film Transistor, TFT) array to control the light emission of each light emitting element. For example, the driving array layer 130 may include a plurality of pixel circuits arranged in an array, and a circuit structure of the pixel circuits is any one of a 2T1C circuit, a 7T2C circuit, or a 9T1C circuit. Herein, "2T1C circuit" refers to a pixel circuit including 2 thin film transistors (T) and 1 capacitor (C) among pixel circuits, other "7T1C circuits", "7T2C circuits", "9T1C circuits", and so on.
The light emitting element layer 140 is located on a side of the driving array layer 130 facing away from the substrate assembly 110. The light emitting element layer 140 may include a plurality of light emitting elements arranged in an array, wherein the light emitting elements are OLED light emitting elements. Alternatively, each light emitting element is electrically connected to a corresponding one of the pixel circuits, so that the pixel circuits drive the corresponding light emitting element to emit light.
The thin film transistor in the pixel circuit generally includes an active layer and a gate electrode disposed to be insulated from the active layer by a gate insulating layer. The active layer has a conductive channel between the source region and the drain region when the gate electrode applies an on-voltage. When the conductive channel of the thin film transistor is irradiated by light, a photo leakage current is easily generated, and the characteristics of the thin film transistor are changed due to long-time irradiation.
According to the display panel 100 of the embodiment of the present invention, the substrate assembly 110 has the first area DA1 corresponding to the first opening 121, and the display panel 100 can transmit light in the first area DA1, so that the first area DA1 can be used as a multiplexing area of the photosensitive function. Optionally, the overall light transmittance of the display panel 100 in the first area DA1 is greater than the overall light transmittance in the second area DA2, so as to improve the light transmittance of the photosensitive function multiplexing area, i.e., the first area DA1, and facilitate the integration of photosensitive elements in the first area DA 1.
In some embodiments, the display panel 100 may further include an encapsulation layer 150 and a cover plate 160, wherein the encapsulation layer 150 is located at a side of the light emitting element layer 140 facing away from the substrate assembly 110, and the encapsulation layer 150 may cover a plurality of light emitting element arrangements of the light emitting element layer 140. The cover plate is located on a side of the encapsulation layer 150 facing away from the base assembly 110.
The electrically controlled light valve assembly 170 is located on a side of the driving array layer 130 facing away from the light emitting element layer 140. The front projection of the electrically controlled light valve assembly 170 on the adhesive tape layer 120 covers the first opening 121. The electronically controlled light valve assembly 170 is capable of adjusting light transmittance based on the received electrical signal.
According to the display panel 100 of the embodiment of the invention, the adhesive tape layer 120 is located on one side of the substrate assembly 110, and the adhesive tape layer 120 includes the first opening 121. The display panel 100 may include a first area DA1 corresponding to the first opening 121 and a second area DA2 disposed around at least a portion of the first area DA 1. In general, the adhesive layer 120 is a light absorbing layer, at this time, the air at the interface between the substrate assembly 110 of the first area DA1 and the first opening 121 generates more reflected light due to the refractive index difference, and the substrate assembly 110 of the second area DA2 generates less reflected light due to the existence of the adhesive layer 120, so that the irradiation amount of the reflected light received by the driving array layer 130 of the first area DA1 is different from the irradiation amount of the reflected light received by the driving array layer 130 of the second area DA2, and the device characteristics of the first area DA1 are different from the device characteristics of the second area DA2. In the embodiment of the present invention, the front projection of the electronic control light valve assembly 170 on the adhesive tape layer 120 covers the first opening 121, and the electronic control light valve assembly 170 can adjust the light transmittance according to the received electrical signal. When the first area DA1 of the display panel 100 is used for photosensitive multiplexing, the light transmittance of the electronically controlled light valve assembly 170 can be improved, so that the photosensitive element can smoothly receive the light passing through the first area DA 1; when the first area DA1 of the display panel 100 displays a picture, the transmittance of the electronically controlled light valve assembly 170 may be reduced, thereby reducing the reflected light received by the driving array layer 130 of the first area DA1, and thus reducing the display brightness difference between the first area DA1 and the second area DA2.
In some embodiments, the electronically controlled light valve assembly 170 is located between the substrate assembly 110 and the drive array layer 130, or in some embodiments, the substrate assembly 110 includes at least two sub-layers, with the electronically controlled light valve assembly 170 being located between any adjacent sub-layers of the substrate assembly 110.
In some embodiments, the electrically controlled light valve assembly 170 is located at a side of the substrate assembly 110 facing away from the driving array layer 130, so that the electrically controlled light valve assembly 170 can be integrally disposed at one side of the substrate assembly 110 after the driving array layer 130, the light emitting element layer 140, etc. of the display panel 100 are fabricated, thereby reducing the difficulty of integrating the electrically controlled light valve assembly 170 in the display panel 100 and improving the fabrication efficiency of the display panel 100 with the electrically controlled light valve assembly 170.
Fig. 3 is a schematic cross-sectional view of an electronically controlled light valve assembly of a display panel according to one embodiment of the present invention. In some embodiments, the electronically controlled light valve assembly 170 includes an electrochromic assembly 170a. The electrochromic assembly 170a includes a first light-transmitting electrode 171 and a second light-transmitting electrode 172, the first light-transmitting electrode 171 and the second light-transmitting electrode 172 being disposed opposite to each other in a direction perpendicular to the substrate assembly 110, and the first light-transmitting electrode 171 and the second light-transmitting electrode 172 may be Indium Tin Oxide (ITO) layers. The electrically controlled light valve assembly 170 further includes an electrochromic film 173, the electrochromic film 173 being sandwiched between the first light transmissive electrode 171 and the second light transmissive electrode 172. When the electrically controlled light valve assembly 170 includes the electrochromic assembly 170a, the electrically controlled light valve assembly 170 has a thinner thickness, so that the display panel 100 can be made thinner and lighter.
Optionally, the electrochromic film 173 is capable of transitioning between a transparent state and a colored state that is the same color as the tape layer 120, based on the electrical signal received by the electrochromic assembly 170a. For example, the tape layer 120 is a black tape layer, and the electrochromic film 173 is capable of transitioning between a transparent state and a black state. When the electrochromic film 173 is in a transparent state, the entire light transmission performance of the display panel 100 in the region corresponding to the first opening 121 can be improved. When the electrochromic film 173 is in a colored state, the absorptivity and reflectivity of the electrochromic film to light and the adhesive tape layer 120 tend to be consistent, so that the reflected light received by the driving array layer 130 at each place of the display panel 100 tends to be consistent, and the uniformity of the display brightness of the display panel 100 is improved.
Fig. 4 is a schematic cross-sectional view of an electronically controlled light valve assembly for a display panel according to an alternative embodiment of the present invention. The electrically controlled light valve assembly 170 includes a liquid crystal light valve assembly 170b, the liquid crystal light valve assembly 170b including a liquid crystal cell 174, a first polarizer 175, and a second polarizer 176.
The liquid crystal cell 174 may include a third light-transmissive electrode 1741, a fourth light-transmissive electrode 1742, and a liquid crystal layer 1743 sandwiched between the third light-transmissive electrode 1741 and the fourth light-transmissive electrode 1742. The first polarizer 175 is located on a side of the liquid crystal cell 174 facing away from the light emitting element layer 140. The second polarizer 176 is located at a side of the liquid crystal cell 174 facing the light emitting element layer 140. By applying different electric fields across the third and fourth transmissive electrodes 1741, 1742, the orientation of the liquid crystal molecules in the layer of liquid crystal layer 1743 is changed such that the electrically controlled light valve assembly 170 switches between a transmissive state and an opaque state.
Alternatively, the liquid crystal cell 174 is a Twisted Nematic (TN) liquid crystal cell 174, and the transmission axis of the first polarizer 175 is orthogonal to the transmission axis of the second polarizer 176. In other embodiments, the liquid crystal cell 174 may be a vertical alignment type (vertical alignment, VA), in-Plane Switching type (IPS), fringe field Switching type (Fringe Field Switching, FFS), or the like. By configuring the liquid crystal cell 174 as a twisted nematic type, the light transmission capability of the electrically controlled light valve assembly 170 is stronger in the light-permeable state, so that the light flux received by the photosensitive element on the back side of the display panel 100 is improved, and the photosensitive effect is improved.
The electrically controlled light valve assembly 170 may not be limited to the examples described above, and in some embodiments the electrically controlled light valve assembly 170 includes at least one of an opto-electronic switch, or a magneto-optical switch. Wherein the opto-electronic switch comprises, for example, lithium niobate (LiNbO) 3 ) Two waveguide channels are connected into a Mach-Zehnder interference structure, and the refractive index of the waveguide material can be changed by an applied voltage, so that the on-off control of light is realized by utilizing an interference effect. The magneto-optical switch uses Faraday rotation effect to change the effect of magneto-optical crystal on the polarization plane of incident polarized light by changing the external magnetic field, thereby achieving the effect of switching the light path.
An embodiment of the present invention further provides a display device, and fig. 5 is a schematic cross-sectional view of a display device according to an embodiment of the present invention, where the display device includes a display panel 100 according to any of the foregoing embodiments of the present invention and a photosensitive element 200. The photosensitive element 200 is located on a side of the electronically controlled light valve assembly 170 of the display panel 100 facing away from the light emitting element layer 140.
The photosensitive element 900 may be an optical fingerprint recognition device such that the first area DA1 is multiplexed as a fingerprint recognition area. Of course, in other alternative embodiments, the photosensitive element 900 may also be an image capturing device or a light sensor, so that the first area DA1 is multiplexed into an area of a corresponding function.
According to the display device of the embodiment of the invention, the front projection of the electronic control light valve assembly 170 on the adhesive tape layer 120 covers the first opening 121, and the electronic control light valve assembly 170 can adjust the light transmittance according to the received electrical signal. When the first area DA1 of the display panel 100 is used for light sensing multiplexing, the light transmittance of the electronically controlled light valve assembly 170 can be improved, so that the light sensing element 200 can successfully receive the light passing through the first area DA 1. When the first area DA1 of the display panel 100 displays a picture, the transmittance of the electronically controlled light valve assembly 170 may be reduced, thereby reducing the reflected light received by the driving array layer 130 of the first area DA1, and thus reducing the display brightness difference between the first area DA1 and the second area DA2.
The embodiment of the present invention also provides a control method of a display panel, for example, for controlling the display panel 100 according to any of the foregoing embodiments of the present invention.
The control method comprises the following steps: in the first mode, the first information is received by the electronically controlled light valve assembly 170 such that the electronically controlled light valve assembly 170 has a first light transmittance; in the second mode, the second information is received by the electronically controlled light valve assembly 170 such that the electronically controlled light valve assembly 170 has a second light transmittance, wherein the second light transmittance is greater than the first light transmittance. Alternatively, the display panel 100 may be combined with a photosensitive element, and the first mode is, for example, a normal display mode and the second mode is, for example, a photosensitive mode.
Fig. 6 is a schematic cross-sectional view of a display panel combined with a photosensitive element according to an embodiment of the present invention in a first mode. In the first mode, i.e., the normal display mode, the electronically controlled light valve assembly 170 receives the first information, thereby having a lower first light transmittance. When the external light L1 irradiates the display panel 100, the transmittance of the external light L1 at the position of the electrically controlled light valve assembly 170 and the adhesive tape layer 120 is lower, so as to reduce the reflected light received by the driving array layer 130 of the first area DA1, and the reflected light received by the driving array layer 130 of the second area DA2 is also lower, so that the display brightness difference between the first area DA1 and the second area DA2 can be reduced.
Fig. 7 is a schematic cross-sectional view of a display panel combined with a photosensitive element according to an embodiment of the present invention in a second mode. In the second mode, i.e., the photosensitive mode, the electronically controlled light valve assembly 170 receives the second information, thereby having a higher second transmittance. The external light L1 can smoothly pass through the first area DA1 of the display panel 100 to irradiate the photosensitive element 200, so that the photosensitive element 200 can realize a corresponding photosensitive function.
Optionally, the electronically controlled light valve assembly 170 includes an electrochromic assembly 170a, the electrochromic assembly 170a including an electrochromic film 173. The control method comprises the following steps: in the first mode, the first information is received through the electrochromic assembly 170a, so that the electrochromic film 173 is in a colored state of the same color as the adhesive tape layer 120; in the second mode, the second information is received through the electrochromic assembly 170a such that the electrochromic film 173 is in a transparent state. When the electrochromic film 173 is in a transparent state, the entire light transmission performance of the display panel 100 in the region corresponding to the first opening 121 can be improved. When the electrochromic film 173 is in a colored state, the absorptivity and reflectivity of the electrochromic film to light and the adhesive tape layer 120 tend to be consistent, so that the reflected light received by the driving array layer 130 at each place of the display panel 100 tends to be consistent, and the uniformity of the display brightness of the display panel 100 is improved.
In accordance with the above embodiments of the invention, these embodiments are not exhaustive of all details, nor are they intended to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. A display panel, comprising:
a base assembly;
a tape layer positioned on one side of the base assembly, the tape layer comprising a first opening;
a drive array layer positioned on a side of the base assembly facing away from the tape layer;
a light emitting element layer located on a side of the drive array layer facing away from the base assembly; and
the electronic control light valve component is positioned at one side of the driving array layer, which is away from the light-emitting element layer, and the orthographic projection of the electronic control light valve component on the adhesive tape layer covers the first opening, and the electronic control light valve component can adjust the light transmittance according to the received electric signal;
the electrically controlled light valve assembly includes a liquid crystal light valve assembly including:
a liquid crystal cell;
the first polaroid is positioned at one side of the liquid crystal box, which is away from the light-emitting element layer; and
and the second polaroid is positioned on one side of the liquid crystal box facing the light-emitting element layer.
2. The display panel of claim 1, wherein the electronically controlled light valve assembly is located on a side of the substrate assembly facing away from the drive array layer.
3. The display panel of claim 1, wherein the liquid crystal cell is a twisted nematic liquid crystal cell, and the transmission axis of the first polarizer is orthogonal to the transmission axis of the second polarizer.
4. The display panel of claim 1, wherein the electronically controlled light valve assembly comprises at least one of an electro-optical switch or a magneto-optical switch.
5. A control method of a display panel, characterized by being used for controlling the display panel according to any one of claims 1 to 4, the control method comprising:
in a first mode, receiving first information through the electronic control light valve assembly, so that the electronic control light valve assembly has first light transmittance;
in a second mode, second information is received by the electrically controlled light valve assembly such that the electrically controlled light valve assembly has a second light transmittance, wherein the second light transmittance is greater than the first light transmittance.
6. The method of claim 5, wherein the electronically controlled light valve assembly comprises an electrochromic assembly comprising an electrochromic film, the method comprising:
in the first mode, the first information is received through the electrochromic assembly, so that the electrochromic film is in a colored state with the same color as the adhesive tape layer;
in the second mode, the second information is received through the electrochromic assembly, so that the electrochromic film is in a transparent state.
7. A display device, comprising:
the display panel according to any one of claims 1 to 4; and
the photosensitive element is positioned on one side of the electric control light valve component of the display panel, which is away from the light-emitting element layer.
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