CN111489656B - Display device alignment method and display device - Google Patents

Display device alignment method and display device Download PDF

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Publication number
CN111489656B
CN111489656B CN202010337591.7A CN202010337591A CN111489656B CN 111489656 B CN111489656 B CN 111489656B CN 202010337591 A CN202010337591 A CN 202010337591A CN 111489656 B CN111489656 B CN 111489656B
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display
display panel
mark
display mark
unit
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CN111489656A (en
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董崔健
周一安
秦锋
刘金娥
孔祥建
王磊
许文钦
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

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  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract

The invention discloses a display device and an alignment method thereof. The alignment method of the display device comprises the following steps: controlling a first display panel to display a first display mark pattern in a first display area, wherein the first display mark pattern comprises more than two first display mark units; controlling a second display panel to display a second display mark pattern in a second display area, wherein the second display mark pattern comprises more than two second display mark units; arranging the first display panel on the light emergent surface side of the second display panel, so that the light of the second display mark pattern can penetrate through the first display panel; and configuring the relative positions of the first display mark unit and the second display mark unit and enabling at least part of the first display mark unit and the second display mark unit to meet the first position relation so as to align the first display panel and the second display panel. The alignment method of the display device provided by the invention can accurately align the first display panel and the second display panel and can reduce the frame of the display device.

Description

Display device alignment method and display device
Technical Field
The invention relates to the technical field of display, in particular to a display device and an alignment method thereof.
Background
With the rapid development of electronic devices, the requirement of a user on the screen occupation ratio is higher and higher, so that the narrow-bezel display of the electronic device is concerned more and more in the industry.
When the display device includes two display panels stacked together, in order to meet the requirement of alignment for installation of the two display panels, positioning members are usually required to be disposed on the two display panels so as to align the two display panels accurately. However, the positioning member is disposed in the frame region, which is not favorable for the narrow frame of the display device.
Disclosure of Invention
The invention provides a display device and an alignment method thereof, which can realize accurate alignment of a first display panel and a second display panel and can reduce the frame of the display device.
In one aspect, an embodiment of the present invention provides an alignment method for a display device, where the display device includes a first display panel and a second display panel that are disposed opposite to each other, the first display panel has a first display area, the first display area is capable of transmitting light, the second display panel has a second display area, the first display area is capable of covering the second display area, and the alignment method for the display device includes: controlling a first display panel to display a first display mark pattern in a first display area, wherein the first display mark pattern comprises more than two first display mark units; controlling a second display panel to display a second display mark pattern in a second display area, wherein the second display mark pattern comprises more than two second display mark units, and at least part of the second display mark units are matched with the first display mark units; arranging the first display panel on the light emergent surface side of the second display panel, so that the light of the second display mark pattern can penetrate through the first display panel; and configuring the relative positions of the first display mark unit and the second display mark unit and enabling at least part of the first display mark unit and the second display mark unit to meet the first position relation so as to align the first display panel and the second display panel.
On the other hand, an embodiment of the present invention further provides a display device, including: a first display panel having a first display region, the first display region being capable of transmitting light, the first display panel comprising: a first transparent substrate; a second transparent substrate disposed opposite to the first transparent substrate; the first liquid crystal layer is arranged between the first transparent substrate and the second transparent substrate and can be switched between a first state and a second state different from the first state so as to change the light transmittance of the first display area; the first electrode layer is positioned on the surface of the first transparent substrate facing the first liquid crystal layer; the second electrode layer is positioned on the surface of the second transparent substrate facing the first liquid crystal layer; the first display panel can display a first display mark pattern in a first display area, and the first display mark pattern comprises more than two first display mark units; the second display panel is provided with a second display area, the first display panel is positioned on the light emitting surface side of the second display panel, the second display panel can display a second display mark pattern, the second display mark pattern comprises more than two second display mark units, and at least part of the first display mark units and the second display mark units meet the first position relation.
According to the alignment method of the display device and the display device, the first display area of the first display panel is controlled to display the first display mark pattern, the second display panel is controlled to display the second display pattern in the second display area, light of the second display mark pattern can penetrate through the first display panel due to the fact that the first display panel can transmit light, alignment can be conducted through the first display mark pattern and the second display mark pattern penetrating through the first display panel, and when at least part of the first display mark unit and the second display mark unit meet the first position relation, the first display panel and the second display panel can be accurately positioned. Compared with the traditional method of arranging the positioning pieces in the frame areas of the first display panel and the second display panel, the display device in the embodiment of the invention can save the space for arranging the positioning pieces in the frame by displaying the mark patterns in the display areas and aligning, thereby reducing the size of the frame.
Furthermore, after the first display panel and the second display panel are aligned, the first display marking unit can be combined with other display contents to form a display picture of the first display panel, and the second display marking unit can also be combined with other display contents to form a display picture of the second display panel, so that the first display marking pattern and the second display marking pattern are prevented from influencing the display picture of the display area of the display device.
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Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
Fig. 1 is a top view of a display device provided in one embodiment of the present invention;
FIG. 2 is a cross-sectional view of the display device provided as an example in FIG. 1, taken along the direction B-B;
FIG. 3 is a cross-sectional view of another example of the display device of FIG. 1 taken along the direction B-B;
fig. 4 is a flowchart illustrating an alignment method of a display device according to an embodiment of the invention;
fig. 5 is a schematic flowchart illustrating an alignment method of a display device according to another embodiment of the invention;
FIG. 6 is a schematic flow chart of step S150 in FIG. 5;
fig. 7 is a structural view showing the first display mark pattern and the second display mark pattern after alignment in the display device according to the embodiment of the present invention;
fig. 8 is a structural view of the display device according to another embodiment of the present invention after alignment of the first display mark pattern and the second display mark pattern;
fig. 9 is a structural view of the display device according to still another embodiment of the present invention after alignment of the first display mark pattern and the second display mark pattern;
fig. 10 is a structural diagram of the display device according to another embodiment of the present invention after alignment of the first display mark pattern, the second display mark pattern, the third display mark pattern and the fourth display mark pattern;
fig. 11 is a schematic diagram of a display screen of the first display panel in the display mode according to an embodiment of the present invention.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make 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 specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting 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 present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In present electronic devices, for example, wearable devices such as smartwatches and wristbands generally include two display panels that are disposed oppositely, and one of the display panels is used as a main display panel and includes a pixel structure and a pixel circuit structure, so as to realize full-color display of the display panel. The other display panel is arranged on the light emitting surface side of the main display panel, and can perform dimming or auxiliary display functions on the display device so as to meet various requirements of users. Because the wearable device needs to be worn on the user, for example, on the wrist or the arm of the user, the wearable device needs to be small in size, light in weight and convenient for the user to wear, and further, because the wearable device is limited in size, in order to enable the wearable device to display more contents or facilitate the user to view, the frame of the wearable device needs to be reduced, so as to improve the screen occupation ratio of the wearable device.
When the display device includes two display panels, especially when the two display panels are of a circular structure, there is no corresponding straight edge or rectangular structure on the two display panels for the two display panels to align, and usually, in order to achieve the alignment of the two display panels and to reduce the influence on the display images of the display panels, a positioning member is usually disposed on the frames of the two display panels, so as to achieve the accurate alignment of the two display panels during the installation, but is not favorable for achieving a narrow frame.
In order to solve the above problem, embodiments of the present invention provide a method for aligning a display device and a display device. The following describes the alignment method of the display device and the display device in detail with reference to fig. 1 to 11.
Referring to fig. 1 and 3 together, fig. 1 illustrates a top view of a display device according to an embodiment of the present invention, fig. 2 illustrates a cross-sectional view of an exemplary display device of fig. 1 taken along a direction B-B, and fig. 3 illustrates a cross-sectional view of another exemplary display device of fig. 1 taken along the direction B-B. The embodiment of the invention provides a display device 1000, which includes a first display panel 100 and a second display panel 200 that are oppositely disposed, the first display panel 100 and the second display panel 200 can be stably connected through a connection layer 300, and the connection layer 300 can be Optical Clear Adhesive (OCA). The display device 1000 according to the embodiment of the present invention may be a wearable device, such as a smart watch or a smart bracelet, and of course, the display device 1000 according to the embodiment of the present invention may also be an electronic device such as a mobile phone and a tablet.
The first display panel 100 has a first display area AA1, the first display area AA1 is capable of transmitting light, and the first display panel 100 includes a first transparent substrate 11, a second transparent substrate 12, a first liquid crystal layer 30, a first electrode layer 21, and a second electrode layer 22. The second transparent substrate 12 is disposed opposite to the first transparent substrate 11, the first liquid crystal layer 30 is sandwiched between the first transparent substrate 11 and the second transparent substrate 12, and the first liquid crystal layer 30 can be switched between a first state and a second state different from the first state to change the light transmittance of the first display area AA 1. The first electrode layer 21 is located on the surface of the first transparent substrate 11 facing the first liquid crystal layer 30, and the second electrode layer 22 is located on the surface of the second transparent substrate 12 facing the first liquid crystal layer 30. The first electrode layer 21 and/or the second electrode layer 22 include a preset electrode pattern, and a first preset voltage is configured between the first electrode layer 21 and the second electrode layer 22 and at a position corresponding to the preset electrode pattern, so that the first display panel 100 can display the first display mark pattern MA1 in the first display area AA1, and the first display mark pattern MA1 includes two or more first display mark units MA 11.
The material of the first electrode layer 21 may include Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). Similarly, the material of the second electrode layer 22 may include Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). Further, the first transparent substrate 11 may include a transparent glass substrate or a transparent plastic substrate. Likewise, the second transparent substrate 12 may include a transparent glass substrate or a transparent plastic substrate. Further, the first display panel 100 further includes an encapsulation layer 40 between the first transparent substrate 11 and the second transparent substrate, and the encapsulation layer 40 is disposed on an outer peripheral side of the first liquid crystal layer 30 and seals the first liquid crystal layer 30.
Further, the second display panel 200 has a second display area AA2, and the first display panel 100 is located on the light-emitting surface side of the second display panel 200, wherein the second display panel 200 is capable of displaying a second display mark pattern MA2, the second display mark pattern MA2 includes two or more second display mark units MA21, and at least a part of the first display mark units MA11 and the second display mark units MA21 satisfy the first positional relationship.
In the display device 1000 according to the embodiment of the invention, the first liquid crystal layer 30 of the first display panel 100 can be switched between the first state and the second state different from the first state to change the light transmittance of the first display area AA1, so that the display screen of the second display panel 200 can transmit through the first display panel 100, for example, the light of the second display mark pattern MA2 of the second display panel 200 can transmit through the first display panel 100, and a tester or an automatic detection device can detect whether the first display panel 100 and the second display panel 200 are aligned correctly through the second display mark pattern MA2 and the first display mark pattern MA 1. Furthermore, since the first display mark pattern MA1 is located in the first display area AA1 of the first display panel 100, and the second display mark pattern MA2 is located in the second display area AA2 of the second display panel 200, the space for respectively arranging the positioning elements on the frames of the first display panel 100 and the second display panel 200 can be saved, thereby effectively reducing the frame size of the display device 1000. Further, after the first display panel 100 and the second display panel 200 are aligned, the first display marking unit MA11 may be combined with other display content to form a display screen of the first display panel 100, and the second display marking unit MA21 may be combined with other display content to form a display screen of the second display panel 200, so as to prevent the first display marking pattern MA1 and the second display marking pattern MA2 from affecting the display screen of the display area of the display device 1000. Next, description will be first made on the first display panel 100. In some embodiments, the first display panel 100 is a Polymer Network Liquid Crystal (PNLC) display panel, and Liquid Crystal molecules in the PNLC display panel are distributed in a Polymer three-dimensional Network to form a continuous Network of channels. The PNLC display panel includes two types of display panels, in the first type of PNLC display panel, the first liquid crystal layer 30 includes liquid crystal molecules and a polymer matrix, and in the case where a predetermined voltage is not configured between the first electrode layer 21 and the second electrode layer 22, since the liquid crystal molecules in the PNLC display panel are surrounded by the curved polymer matrix, spatial distortion of nematic director occurs in the liquid crystal channel, and then discontinuity of nematic director occurs between the liquid crystal channels separated by the polymer matrix wall, and at the same time, due to the generation of an optical interface caused by the refractive index disparity of the polymer matrix and the liquid crystal molecules, the incident light is strongly scattered while passing through the first liquid crystal layer 30, and the incident light cannot penetrate through the first liquid crystal layer 30, so that the first display panel 100 assumes a dark state (fog state). When a predetermined voltage is applied between the first electrode layer 21 and the second electrode layer 22, the liquid crystal molecules having dielectric anisotropy are subjected to an electric field torque, the director direction of the liquid crystal molecules maintains the same direction as the electric field, and the incident light can pass through the first liquid crystal layer 30 of the PNLC display panel, so that the first display panel 100 is in a bright state. In the second PNLC display panel, when a predetermined voltage is not applied between the first electrode layer 21 and the second electrode layer 22, the first display panel 100 is in a bright state, and when a predetermined voltage is applied between the first electrode layer 21 and the second electrode layer 22, the first display panel 100 is in a dark state (a foggy state). Since the PNLC display panel has the advantages of low power consumption, a transmittance of transparent incident light of 80%, and the like, the power consumption of the display device 1000 can be reduced and the display effect of the display device 1000 can be ensured by setting the first display panel 100 as the PNLC liquid crystal display panel.
In some embodiments, the first display panel 100 may also be a Polymer Dispersed Liquid Crystal (PDLC) display panel. The PDLC display panel can realize a photoelectric response characteristic by dielectric anisotropy of liquid crystal molecules by uniformly dispersing the liquid crystal molecules in a polymer network of a polymer. The PDLC display panel includes a forward PDLC display panel and a reverse PDLC display panel. With respect to the forward PDLC display panel, the forward PDLC display panel assumes a light scattering state (dark state) when a predetermined voltage is applied between the first electrode layer 21 and the second electrode layer 22, and assumes a transparent state when a predetermined voltage is not applied between the first electrode layer 21 and the second electrode layer 22. For the reverse PDLC display panel, when a predetermined voltage is not applied between the first electrode layer 21 and the second electrode layer 22, the reverse PDLC display panel is in a light scattering state (dark state), and when a predetermined voltage is applied between the first electrode layer 21 and the second electrode layer 22, the reverse PDLC display panel is in a transparent state. By setting the first display panel 100 as the PDLC display panel, the light transmittance of the first display panel 100 can be changed by the state of the liquid crystal molecules in the first liquid crystal layer 30 to accurately align the first display panel 100 and the second display panel 200. In specific implementation, the reverse PDLC display panel or the forward PDLC display panel may be set according to the user's requirement.
In order to change the light transmittance of the first display panel 100 and have a display effect, in some embodiments, the first display panel 100 may also be a guest host liquid crystal. In the embodiment of the present invention, the liquid crystal molecules have dielectric and refractive index anisotropies, so that the alignment direction of the liquid crystal molecules can be changed by the action of an electric field, and although the dye molecules have no dielectric anisotropies, that is, the dye molecules are not controlled by the electric field, when the dye molecules are dissolved in the aligned liquid crystal molecule host, the dye molecules will be 'guest-host-oriented' and aligned in the same direction as the liquid crystal molecules. Under the action of an electric field, liquid crystal molecules as a host or a matrix deflect at a certain angle, and dye molecules as guest or guest deflect at the same angle along with the deflection of the liquid crystal molecules, so that the dye molecules are characterized by guest-host transformation. The dye molecules include positive dichroic dye molecules and negative dichroic dye molecules, and taking the dye molecules as the negative dichroic dye molecules as an example, when the polarization (vibration) direction of the linearly polarized light or linearly polarized light component emitted by the second display panel 200 is perpendicular to the long axis direction of the negative dichroic dye molecules, light is absorbed by the negative dichroic dye molecules, and when the polarization (vibration) direction of the linearly polarized light or linearly polarized light component emitted by the second display panel 200 is parallel to the long axis direction of the negative dichroic dye molecules, the negative dichroic dye molecules can transmit the polarized light or polarized light component. The absorption of polarized light by the positive dichroic dye molecules is opposite to that of the negative positive dichroic dye molecules and will not be described in detail. By configuring the first display panel 100 as a guest-host liquid crystal display panel, when the user needs to reduce the brightness of the light of the display device 1000, the guest-host liquid crystal display panel can be adjusted to meet the user's requirements.
When the first display panel 100 is a PNLC display panel, a PDLC display panel, or a guest-host liquid crystal display panel, the adjustment method of the light transmittance of the first display panel 100 and the alignment method of the first display panel 100 and the second display panel 200 are similar, and the first display panel 100 is exemplified as a PNLC display panel. When the display device 1000 is a wearable device, for example, the display device 1000 is a watch or a smart band, the PNLC display panel may be used to display basic information such as time, weather, or characters, and the power consumption is low, and when the display device 1000 needs to display a complex picture, for example, color picture information, the PNLC display panel may be completed using the second display panel 200.
When the first display panel 100 and the second display panel 200 are aligned, the first display panel 100 displays the first display mark pattern MA1, and the second display panel 200 displays the second display mark pattern MA2, specifically, for the first display panel 100, a first preset voltage is configured between the first electrode layer 21 and the second electrode layer 22 of the first display panel 100 and at a position corresponding to the preset electrode pattern, so that the first display panel 100 displays the first display mark pattern MA1 in the first display area AA1, at this time, the first display mark pattern MA1 of the first display panel 100 is in an opaque state or has a lower light transmittance compared with other positions of the first display panel 100, and the other positions of the first display panel 100 are in a bright state. For the second display panel 200, the second display mark pattern MA2 is formed by controlling the display of the preset sub-pixels on the second display panel 200 through an Integrated Circuit (IC). With the above arrangement, it is convenient for the light of the second display mark pattern MA2 to pass through the first display panel 100, so that the first display panel 100 and the second display panel 200 are accurately aligned.
When the display device 1000 needs to display a simple picture, such as time, weather, etc., the voltage between the first electrode layer 21 and the second electrode layer 22 of the first display panel 100 may be controlled by the IC chip, so that the first display panel 100 displays the simple picture, and the second display panel 200 may not display the simple picture. When the display device 1000 needs to display a complicated picture, such as a color picture, the IC chip can control all the first display areas AA1 of the first display panel 100 to be in a bright state, and the IC chip controls the sub-pixels of the second display panel 200 to display, at this time, the content displayed by the second display panel 200 can pass through the first display panel 100 for the user to view.
Referring to fig. 7 to 10 together, fig. 7 illustrates a structural diagram of the display device according to one embodiment of the present invention after alignment, fig. 8 illustrates a structural diagram of the display device according to another embodiment of the present invention after alignment, fig. 9 illustrates a structural diagram of the display device according to another embodiment of the present invention after alignment, and fig. 10 illustrates a structural diagram of the display device according to another embodiment of the present invention after alignment.
In order to achieve accurate alignment of the first display panel 100 and the second display panel 200, in some embodiments, the first display mark units MA11 on the first display panel 100 are in one-to-one correspondence with the second display mark units MA21 on the second display panel 200, and the first positional relationship is that the distance between the orthographic projection of each first display mark unit on the second display panel 200 and the corresponding second display mark unit MA21 is within a preset range. In implementation, the preset range may be set according to a user's requirement or the precision of the display apparatus 1000, so that when the first display panel 100 and the second display panel 200 are displaying the same picture, the display apparatus 1000 viewed by the user is prevented from generating a ghost image.
With reference to fig. 2 and fig. 3, in some embodiments, the second electrode layer 22 is a common electrode layer, for example, the second electrode layer 22 may be a whole-surface electrode, the first electrode layer 21 is a display electrode layer, the first electrode layer 21 includes a plurality of first electrode blocks 211 and a plurality of second electrode blocks 212 arranged in an array, the plurality of first electrode blocks 211 form a predetermined electrode pattern, and a first predetermined voltage is configured between the first electrode blocks 211 and the second electrode layer 22, so that the first display panel 100 can display the first display mark pattern MA1 in the first display area AA 1. In implementation, the voltage value of the first preset voltage may be set according to a liquid crystal type of the first liquid crystal layer 30.
The second preset voltage is applied between the second electrode block 212 and the second electrode layer 22, so that the first display panel 100 can display the third display mark pattern MA3 in the first display area AA1, the third display mark pattern MA3 includes two or more third display mark units MA31, and the third display mark unit MA31 has a shape different from that of the first display mark unit MA11 or the third display mark pattern MA3 has an asymmetric pattern. The first preset voltage and the second preset voltage may be the same, or different preset voltages may be set respectively. Through the arrangement, the first display panel 100 can display the first display mark pattern MA1 and the third display mark pattern MA3, so as to detect the alignment of the first display panel 100 and the second display panel 200, for example, to perform a foolproof function.
In a specific embodiment, the first display panel 100 is in an open state when no display screen is displayed, and when the first display panel 100 and the second display panel 200 are aligned, a first preset voltage is firstly configured between the first electrode block 211 and the second electrode layer 22 to enable the first display panel 100 to display the first display mark pattern MA1, then the alignment detection is performed on the first display panel 100 and the second display panel 200, and a second preset voltage is then configured between the second electrode block 212 and the second electrode layer 22 to enable the first display panel 100 to display the third display mark pattern MA 3. It is understood that, while the first display panel 100 displays the third display mark pattern MA3, the first display panel 100 may not display the first display mark pattern MA 1.
Further, after the display device 1000 completes alignment, the first electrode block 211, the second electrode block 212 and the rest of the electrode structures in the first electrode layer 21 may be controlled to have the same potential, and at this time, the first display panel 100 may be in a bright state to avoid shielding of the display content of the second display panel 200, so as to implement switching of multiple modes of the first display panel 100.
When the first display panel 100 and the second display panel 200 are both symmetrical graphics, in order to effectively prevent the first display panel 100 and the second display panel 200 from being reversely mounted in the aligning process, the second display panel 200 can display a fourth display mark pattern MA4, the fourth display mark pattern MA4 includes two or more fourth display mark units MA41, and the third display mark unit MA31 and the fourth display mark unit MA41 satisfy the second positional relationship. The second positional relationship is that the distance between the orthographic projection of the fourth display marking unit MA41 on the first display panel 100 and the third display marking unit MA31 is within a predetermined range, so as to meet the alignment accuracy requirement.
In some embodiments, the first electrode layer 21 includes a plurality of third electrode blocks 213 arranged in an array, the third electrode blocks 213 are respectively spaced apart and insulated from the first electrode blocks 211 and the second electrode blocks 212, and a third preset voltage is configured between the third electrode blocks 213 and the second electrode layer 22, so that the first display panel 100 is in a display mode. Referring to fig. 11, fig. 11 is a schematic view of a display frame of the first display panel in the display mode according to an embodiment of the disclosure. The first display panel 100 is in a display mode, and the first display panel 100 can display at least one of weather, time, and characters. By disposing the third electrode block 213 at an interval from the first electrode block 211 and the second electrode block 212, respectively, the first display mark pattern MA1 and the third display mark pattern MA3 are not displayed in the display mode of the first display panel 100, thereby preventing the display mark patterns from affecting the display screen in the display mode.
Next, description will be made on the second display panel 200. In some embodiments, the second display panel 200 is one of a liquid crystal display panel or an Organic Light-Emitting Diode (OLED) display panel. With the above arrangement, the second display panel 200 can display a complex screen such as a full-color screen, and the display effect of the display device 1000 is improved. In particular implementation, the alignment of the first display panel 100 and the second display panel 200 may be facilitated by supplying power and data signals to the corresponding pixel structures such that the second display panel 200 displays the second display mark pattern MA2 and the fourth display mark pattern MA 4.
Alternatively, the second display panel 200 has a non-display area NA disposed at an outer circumferential side of the second display area AA2, and the second display panel 200 includes a gate driving circuit located at the non-display area NA. Each gate driving circuit includes a plurality of Shift registers (VSRs) cascaded in cascade. Each row of pixel circuits is connected with the gate drive circuit through a corresponding scanning line. The gate driving circuit can gate the pixel circuits row by row through the scanning lines (i.e. scanning row by row) to drive the pixels in each row to display. In some embodiments, the driving circuit is, for example, an Amorphous Silicon Gate drive (ASG) driving circuit. With the above arrangement, the pixel structure in the second display panel 200 is enabled to perform display.
In summary, in the display device 1000 according to the embodiment of the present invention, the first display mark unit MA11 is disposed in the first display area AA1, and the second display mark unit MA21 is disposed in the second display area AA2, so that the display mark units in the display device 1000 are all disposed in the display area, and the space of the non-display area, that is, the frame is saved.
Referring to fig. 4, fig. 4 is a flowchart illustrating an alignment method of a display device according to an embodiment of the invention. The embodiment of the present invention further provides an alignment method for a display device 1000, where the display device 1000 may be the display device 1000 of any of the embodiments, and the display device 1000 may include a first display panel 100 and a second display panel 200 that are disposed opposite to each other, the first display panel 100 has a first display area AA1, the first display area AA1 is transparent, the second display panel 200 has a second display area AA2, and the first display area AA1 can cover the second display area AA 2. Since the first display panel 100 and the second display panel 200 are disposed opposite to each other, the first display panel 100 can avoid affecting the second display area AA2 of the second display panel 200 by covering the first display area AA1 with the second display area AA 2.
Referring to fig. 1, the alignment method of the display device 1000 includes the following steps:
s110, the first display panel is controlled to display a first display mark pattern in the first display area, and the first display mark pattern comprises more than two first display mark units.
In some embodiments, the first display panel 100 includes a first transparent substrate 11, a second transparent substrate 12, a first liquid crystal layer 30, a first electrode layer 21, and a second electrode layer 22. The second transparent substrate 12 is disposed opposite to the first transparent substrate 11, the first liquid crystal layer 30 is sandwiched between the first transparent substrate 11 and the second transparent substrate 12, and the first liquid crystal layer 30 can be switched between a first state and a second state different from the first state to change the light transmittance of the first display area AA 1. The first electrode layer 21 is located on a surface of the first transparent substrate 11 facing the first liquid crystal layer 30, and the second electrode layer 22 is located on a surface of the second transparent substrate 12 facing the first liquid crystal layer 30, wherein the first electrode layer 21 and/or the second electrode layer 22 includes a predetermined electrode pattern. The first display panel 100 may be the first display panel 100 of any of the above-described embodiments, and details are not repeated.
In a specific implementation, a first preset voltage may be configured between the first electrode layer 21 and the second electrode layer 22 and corresponding to the preset electrode pattern, so that the first display panel 100 displays the first display mark pattern MA1 in the first display area AA 1.
And S120, controlling a second display panel to display a second display mark pattern in a second display area, wherein the second display mark pattern comprises more than two second display mark units, and at least part of the second display mark units are matched with the first display mark units.
In some embodiments, the second display panel 200 is one of a liquid crystal display panel or an organic light emitting diode display panel. The second display panel 200 includes a plurality of pixel structures, and the second display panel 200 can be controlled to display the second display mark pattern MA2 in the second display area AA2 by presetting a corresponding program in the second display panel 200. Wherein at least part of second display mark unit MA21 matching with first display mark unit MA11 means that at least part of second display mark unit MA21 matches in shape and position with first display mark unit MA 11. For example, the distance between two adjacent second display marking units MA21 is the same as the distance between adjacent first display marking units MA11, so that the first display panel 100 and the second display panel 200 can be aligned by the first display marking units MA11 and the second display marking units MA 21. It can be understood that the first display marking unit MA11 or the second display marking unit MA21 may be redundantly disposed to implement functions such as position alignment detection, for example, detecting whether the display panel has a reverse mounting problem.
S130, arranging the first display panel on the light emergent surface side of the second display panel, so that the light of the second display mark pattern can penetrate through the first display panel.
In some embodiments, the first display panel 100 and the second display panel 200 are disposed opposite to each other, and at this time, since the first display panel 100 can transmit light, after the light of the second display mark pattern MA2 passes through the first display panel 100, the first display panel 100 and the second display panel 200 can be aligned by detecting the relationship between the first display mark unit MA11 and the second display mark unit MA 21.
S140, configuring the relative positions of the first display mark unit and the second display mark unit and enabling at least part of the first display mark unit and the second display mark unit to meet the first position relation so as to enable the first display panel and the second display panel to be aligned.
Since at least part of the second display mark unit MA21 matches the first display mark unit MA11, by arranging the positions between the first display mark unit MA11 and the second display mark unit MA21 that match each other after the first display panel 100 is disposed on the light exit surface side of the second display panel 200, when the first display mark unit MA11 and the second display mark unit MA21 satisfy the first positional relationship, it is possible to achieve the alignment of the first display panel 100 and the second display panel 200.
Alternatively, in step S110, the display area of the first display mark pattern MA1 of the first display panel 100 may be set in advance and the shape of the first display mark unit MA11 may be set, for example, the first display mark unit MA11 may be disposed near the edge area of the first display panel 100 and the first display mark unit MA11 may be disposed in a square structure. Further, the first display mark unit MA11 is arranged corresponding to the number and the position of the first electrode block 211, a corresponding first program is designed according to the number and the position of the first electrode block 211, then the first program is stored in the IC chip in advance, and the IC chip is controlled to configure voltage for the corresponding first electrode block 211 and the second electrode layer 22 according to the first program, so that the first display mark pattern MA1 of the first display panel 100 is enabled, and at this time, the first display mark pattern MA1 is in a non-light-transmitting state or has lower light transmittance compared with other positions of the first display panel 100, so that a tester or an automatic detection device can observe the obvious first display mark pattern MA 1.
Further, in step 120, the display area of the second display mark pattern MA2 of the second display panel 200 may be preset and the shape of the second display mark unit MA21 may be set, for example, the second display mark unit MA21 is disposed near the edge of the second display panel 100 and the second display mark unit MA21 is a ring structure, the row position and the column position of the corresponding predetermined sub-pixel are determined by the shape and the position of the second display mark unit MA21, and the corresponding second program is designed according to the row position and the column position of the predetermined sub-pixel, and then the second degree is stored in the IC chip in advance, and the IC chip is controlled by the control IC chip according to the second program to control the plurality of predetermined sub-pixels in the second display panel 200 to perform light emitting display, and the plurality of predetermined sub-pixels of the light emitting display can be combined to form the second display mark pattern MA 2.
According to the aligning method of the display device 1000 of the embodiment of the invention, the first display panel 100 and the second display panel 200 can be accurately positioned when at least part of the first display mark unit MA11 and the second display mark unit MA21 satisfy the first positional relationship by aligning the first display mark pattern MA1 and the second display mark pattern MA2 penetrating through the first display panel 100. Compared with the conventional method of arranging the positioning elements in the frame regions of the first display panel 100 and the second display panel 200, the display device 1000 in the embodiment of the invention can save the space for arranging the positioning elements in the frame positions by displaying the mark patterns in the display regions and aligning the mark patterns, thereby reducing the size of the frame. In the embodiment of the present invention, after the first display panel 100 is formed and molded and the second display panel 200 is formed and molded, the first display panel 100 and the second display panel 200 are respectively lit and aligned.
In some embodiments, the second display panel 200 has the non-display area NA disposed at an outer circumferential side of the second display area AA2, and after the first display panel 100 and the second display panel 200 are aligned, a forward projection of the first display mark pattern MA1 on the second display panel 200 does not overlap the non-display area. By properly setting the positions of the first display mark patterns MA1, accurate alignment of the first display panel 100 and the second display panel 200 can be achieved, and meanwhile, by setting the orthographic projection of the first display mark patterns MA1 on the second display panel 200 to be not overlapped with the non-display area NA, the first display mark unit MA11 and the second display mark unit MA21 in the first display mark patterns MA1 are prevented from being incapable of detecting whether alignment or not, and the like.
In some embodiments, before the first display panel 100 and the second display panel 200 are aligned, a first positional relationship of the first display mark cell MA11 on the first display panel 100 and the second display mark cell MA21 on the second display panel 200 may be preset. By presetting the first positional relationship, the automatic detection device can detect the alignment condition between the first display panel 100 and the second display panel 200.
In some embodiments, the first display mark units MA11 on the first display panel 100 are in one-to-one correspondence with the second mark units on the second display panel 200, and the first positional relationship is that the distance between the orthographic projection of each first display mark unit MA11 on the second display panel 200 and the corresponding second display mark unit MA12 is within a preset range. Through reasonable setting of the first position relation, the problem that precision is not high in the alignment process between the first display panel 100 and the second display panel 200 is prevented, and the problems of double images and the like when the first display panel 100 and the second display panel 200 display the same picture are prevented.
Referring to fig. 5 and fig. 6, fig. 5 is a flowchart illustrating an alignment method of a display device according to another embodiment of the present invention, and fig. 6 is a flowchart illustrating step S150 in fig. 5. in some embodiments, the alignment method of the display device further includes:
and S150, carrying out alignment detection on the display device.
Specifically, when the first display panel 100 and the second display panel 200 have a symmetrical structure, the alignment detection step can detect whether the two display panels are reversely mounted.
Step S150 of performing alignment detection on the display device includes:
s151, controlling the first display panel to display a third display mark pattern in the first display area, wherein the third display mark pattern comprises more than two third display mark units;
s152, controlling the second display panel to display a fourth display mark pattern MA4 in the second display area, wherein the fourth display mark pattern comprises more than two fourth display mark units, and at least part of the fourth display mark units are matched with the third display mark units;
s153, determining that the third display mark unit and the fourth display mark unit meet a second position relation.
In the step S150, the display screens of the first display panel 100 and the second display panel 200 are aligned and switched, so that the third display mark pattern MA3 is displayed on the first display panel 100 and the fourth display mark pattern MA4 is displayed on the second display panel 200. Of course, the display mark patterns for alignment may be simultaneously displayed on two display panels, for example, the third display mark pattern MA3 and the first display mark pattern MA1 may be simultaneously displayed on the first display panel 100.
Referring to fig. 7, in some embodiments, the shapes of the first display mark unit MA11 and the second display mark unit MA21 are matched, one of the first display mark unit MA11 and the second display mark unit MA21 includes a first inner contour, the area of the other of the first display mark unit MA11 and the second display mark unit MA21 is smaller than or equal to the area of the first inner contour, and the first positional relationship is that the forward projection of the first display mark unit MA11 on the second display panel 200 and the second display mark unit MA21 are mutually sleeved. By arranging the mutual sleeving relation between the first display marking unit MA11 and the second display marking unit MA21, an operator or an alignment detection device can quickly detect whether the alignment marks of the two display panels meet the first position relation. In particular, the alignment accuracy of the first display panel 100 and the second display panel 200 can be better controlled by properly setting the size of the first inner contour.
In some embodiments, second display marking unit MA21 includes a first inner contour, the area of first display marking unit MA11 is smaller than or equal to the area of the first inner contour, and the first positional relationship is that second display marking unit MA21 is sleeved on the outer periphery side of the orthographic projection of first display marking unit MA11 on second display panel 200. Since the first display panel 100 and the second display panel 200 are manufactured separately, by setting the area of the first display mark unit MA11 to be equal to or smaller than the area of the first inner contour, the first display panel 100 and the second display panel 200 can reduce the error in the alignment process, such as the error in the size of the pixel structure or the distance between the pixel structures, which causes the first display panel 100 and the second display panel 200 not to be aligned accurately.
Of course, the first positional relationship between the first display mark unit MA11 and the second display mark unit MA21 may not be only the above-mentioned nesting relationship, but in some embodiments, as shown in fig. 8, the first display mark unit MA11 and the second display mark unit MA21 have the same shape and the same area, and the first positional relationship is that the orthographic projection of the first display mark unit MA11 on the second display panel 200 and the second display mark unit MA21 coincide with each other.
Or as shown in fig. 9, the first display mark unit MA11 and the second display mark unit MA21 have the same shape and different areas, and the first positional relationship may be such that the orthographic projection of the first display mark unit MA11 on the second display panel 200 at least partially overlaps the second display mark unit MA 21. The above arrangement can achieve accurate alignment of the first display panel 100 and the second display panel 200.
Of course, the first positional relationship may also be set according to the user's requirement, and after the first display panel 100 and the second display panel 200 are aligned, the first display mark unit MA11 and the second display mark unit MA21 can form a complete pattern, for example, the first display mark unit MA11 is a part of the number 8, and the second display mark unit MA21 is another part of the number 8. The embodiment of the present invention is not limited to the other first positional relationship as long as the first display panel 100 and the second display panel 200 can be positioned.
Further, the number and the positions of the first display mark units MA11 in the first display mark pattern MA1 may be set according to the needs of the user, the number of the first display mark units MA11 may be 4, and the 4 first display mark units MA11 are uniformly distributed at the edge position of the first display panel 100. The number and distribution positions of second display marker units MA21 may be the same as those of first display marker unit MA 11.
In some embodiments, third display marker unit MA31 matches the shape of fourth display marker unit MA41, one of third display marker unit MA31 and fourth display marker unit MA41 includes a second inner contour, the other of third display marker unit MA31 and fourth display marker unit MA41 has an area equal to or smaller than the area of the second inner contour, and the second positional relationship is that the forward projection of third display marker unit MA31 on second display panel 200 and fourth display marker unit MA41 are nested with each other. In a specific implementation, the second positional relationship may be similar to the first positional relationship, for example, the shapes and areas of the third marking unit and the fourth marking unit may be the same, and the second positional relationship at this time is that the third marking unit and the fourth marking unit are overlapped with each other.
In some embodiments, as shown in fig. 10, the first display mark unit MA11 is spaced apart from the third display mark unit MA31, and at least one of the first display mark unit MA11 and the third display mark unit MA31 has a different shape or the third display mark pattern MA3 is an asymmetric pattern. The second display mark unit MA21 is spaced apart from the fourth display mark unit MA41, and at least one of the second display mark unit MA21 and the fourth display mark unit MA41 has a different shape or the fourth display mark pattern MA4 has an asymmetric pattern.
With the above arrangement, the first display panel 100 and the second display panel 200 can be aligned by the first display mark unit MA11 and the second display mark unit MA21, and then alignment detection can be performed by the third display mark unit MA31 and the fourth display mark unit MA41, for example, when the first display panel 100 and the second display panel 200 have a symmetrical structure, whether the two display panels are reversely mounted can be detected by performing the alignment detection step.
In some embodiments, the shape of each first display marker unit MA11 of the first display marker pattern MA1 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross. Each of the second display marker units MA21 of the second display marker pattern MA2 includes a first inner contour, and the shape of the first inner contour of the second display marker unit MA21 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross, or the shape of each of the second display marker units MA21 of the second display marker pattern MA2 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross.
Similarly, in some embodiments, the shape of each third display marker unit MA31 of the third display marker pattern MA3 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross. Each fourth display marker cell MA41 of the fourth display marker pattern MA4 includes a second inner contour, the shape of the second inner contour of the fourth display marker cell MA41 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross, or the shape of each fourth display marker cell MA41 of the fourth display marker pattern MA4 includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross.
According to the alignment method of the display device in the embodiment of the invention, by controlling the first display area AA1 of the first display panel 100 to display the first display mark pattern MA1 and controlling the second display panel 200 to display the second mark pattern in the second display area AA2, since the first display panel 100 can transmit light, the light of the second display mark pattern MA2 can transmit through the first display panel 100, so that alignment can be performed through the first display mark pattern MA1 and the second display mark pattern MA2 transmitting through the first display panel 100, and when at least part of the first display mark pattern MA11 and the second display mark pattern MA21 satisfy the first positional relationship, accurate positioning of the first display panel 100 and the second display panel 200 can be performed. Compared with the conventional method of arranging the positioning elements in the frame regions of the first display panel 100 and the second display panel 200, the display device 1000 in the embodiment of the invention can save the space for arranging the positioning elements in the frame positions by displaying the mark patterns in the display regions and aligning the mark patterns, thereby reducing the frame size.
In accordance with the above embodiments of the present invention, these embodiments are not intended to be exhaustive or 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 embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims (18)

1. A method for aligning a display device, the display device comprising a first display panel and a second display panel, the first display panel and the second display panel being disposed opposite to each other, the first display panel having a first display area, the first display area being capable of transmitting light, the second display panel having a second display area, the first display area being capable of covering the second display area,
the alignment method of the display device comprises the following steps:
controlling the first display panel to display a first display mark pattern in the first display area, wherein the first display mark pattern comprises more than two first display mark units;
controlling the second display panel to display a second display mark pattern in the second display area, wherein the second display mark pattern comprises more than two second display mark units, and at least part of the second display mark units are matched with the first display mark units;
disposing the first display panel on a light exit surface side of the second display panel such that light of the second display mark pattern can pass through the first display panel;
and configuring the relative positions of the first display marking unit and the second display marking unit and enabling at least part of the first display marking unit and the second display marking unit to meet a first position relation so as to enable the first display panel and the second display panel to be aligned.
2. The method according to claim 1, wherein the second display panel has a non-display area disposed at an outer periphery of the second display area, and after the first display panel and the second display panel are aligned, an orthographic projection of the first display mark pattern on the second display panel does not overlap with the non-display area.
3. The method for aligning a display device according to claim 1, further comprising: presetting the first position relation between the first display mark unit on the first display panel and the second display mark unit on the second display panel.
4. The method according to claim 3, wherein the first display mark units on the first display panel are in one-to-one correspondence with the second display mark units on the second display panel, and the first positional relationship is that a distance between an orthographic projection of each first display mark unit on the second display panel and the corresponding second display mark unit is within a preset range.
5. The method of claim 1, wherein the first display panel comprises:
a first transparent substrate;
a second transparent substrate disposed opposite to the first transparent substrate;
the first liquid crystal layer is clamped between the first transparent substrate and the second transparent substrate and can be switched between a first state and a second state different from the first state so as to change the light transmittance of the first display area;
the first electrode layer is positioned on the surface, facing the first liquid crystal layer, of the first transparent substrate;
the second electrode layer is positioned on the surface, facing the first liquid crystal layer, of the second transparent substrate;
wherein the first electrode layer and/or the second electrode layer comprises a predetermined electrode pattern,
the controlling the first display panel to display the first display mark pattern in the first display area includes:
and configuring a first preset voltage between the first electrode layer and the second electrode layer and corresponding to the preset electrode pattern, so that the first display panel displays the first display mark pattern in the first display area.
6. The method as claimed in claim 1, wherein the first display mark unit and the second display mark unit have matching shapes, one of the first display mark unit and the second display mark unit includes a first inner contour, the other one of the first display mark unit and the second display mark unit has an area smaller than or equal to the area of the first inner contour, and the first position relationship is that an orthographic projection of the first display mark unit on the second display panel is mutually sleeved with the second display mark unit.
7. The method according to claim 6, wherein the second display mark unit comprises a first inner contour, the area of the first display mark unit is smaller than or equal to the area of the first inner contour, and the first positional relationship is that the second display mark unit is sleeved on an outer periphery of an orthographic projection of the first display mark unit on the second display panel.
8. The method according to claim 1, wherein the first display mark unit and the second display mark unit have the same shape and the same area, and the first positional relationship is that an orthographic projection of the first display mark unit on the second display panel and the second display mark unit are overlapped with each other;
or the first display mark unit and the second display mark unit have the same shape and different areas, and the first position relationship is that the orthographic projection of the first display mark unit on the second display panel is at least partially overlapped with the second display mark unit.
9. The method according to claim 1, further comprising performing alignment detection on the display device, wherein the alignment detection on the display device comprises:
controlling the first display panel to display a third display mark pattern in the first display area, wherein the third display mark pattern comprises more than two third display mark units;
controlling the second display panel to display a fourth display mark pattern in the second display area, wherein the fourth display mark pattern comprises more than two fourth display mark units, and at least part of the fourth display mark units are matched with the third display mark units;
determining that the third display mark unit and the fourth display mark unit satisfy a second positional relationship.
10. The method as claimed in claim 9, wherein the third display mark unit and the fourth display mark unit have matching shapes, one of the third display mark unit and the fourth display mark unit includes a second inner contour, the other one of the third display mark unit and the fourth display mark unit has an area smaller than or equal to the area of the second inner contour, and the second position relationship is that the orthographic projection of the third display mark unit on the second display panel is mutually sleeved with the fourth display mark unit.
11. The method of claim 9, wherein the first display mark means and the third display mark means are disposed at intervals, and at least one of the first display mark means and the third display mark means has a different shape or the third display mark pattern is an asymmetric pattern;
the second display mark units and the fourth display mark units are arranged at intervals, and at least one of the second display mark units and the fourth display mark units is different in shape or the fourth display mark pattern is an asymmetric pattern.
12. The method according to any one of claims 1 to 11, wherein the shape of each first display mark unit of the first display mark pattern comprises at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross;
each second display marker unit of the second display marker pattern comprises a first inner contour, a shape of the first inner contour of the second display marker unit comprises at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross,
or the shape of each second display mark unit of the second display mark pattern includes at least one of a triangle, a quadrangle, a circle, an ellipse, a polygon, or a cross.
13. A display device, comprising:
a first display panel having a first display region, the first display region being capable of transmitting light, the first display panel comprising:
a first transparent substrate;
a second transparent substrate disposed opposite to the first transparent substrate;
the first liquid crystal layer is clamped between the first transparent substrate and the second transparent substrate and can be switched between a first state and a second state different from the first state so as to change the light transmittance of the first display area;
the first electrode layer is positioned on the surface, facing the first liquid crystal layer, of the first transparent substrate;
the second electrode layer is positioned on the surface, facing the first liquid crystal layer, of the second transparent substrate;
the first display panel comprises a first display area and a second display area, wherein the first electrode layer and/or the second electrode layer comprises a preset electrode pattern, a first preset voltage is configured between the first electrode layer and the second electrode layer and at a position corresponding to the preset electrode pattern, so that the first display panel can display a first display mark pattern in the first display area, and the first display mark pattern comprises more than two first display mark units;
a second display panel having a second display region, the first display panel being located on a light emitting surface side of the second display panel,
the second display panel can display a second display mark pattern, the second display mark pattern comprises more than two second display mark units, and at least part of the first display mark units and the second display mark units meet a first position relation.
14. The display device according to claim 13, wherein the first electrode layer comprises a plurality of first electrode blocks and a plurality of second electrode blocks arranged in an array, the plurality of first electrode blocks form the predetermined electrode pattern, a first predetermined voltage is configured between the first electrode blocks and the second electrode layer, the first display panel is capable of displaying the first display mark pattern in the first display region,
a second preset voltage is configured between the second electrode block and the second electrode layer, so that a third display mark pattern can be displayed on the first display panel in the first display area, the third display mark pattern comprises more than two third display mark units, and the third display mark units are different from the first display mark units in shape or are asymmetric patterns;
the second display panel can display a fourth display mark pattern, the fourth display mark pattern comprises more than two fourth display mark units, and the third display mark units and the fourth display mark units meet a second position relation.
15. The display device according to claim 14, wherein the first electrode layer comprises a plurality of third electrode blocks arranged in an array, the third electrode blocks are respectively spaced from and insulated from the first electrode blocks and the second electrode blocks, and a third preset voltage is configured between the third electrode blocks and the second electrode layer, so that the first display panel is in a display mode.
16. The display device according to claim 15, wherein the first display panel is capable of displaying at least one of weather, time, and characters in a display mode.
17. The display device according to any one of claims 13 to 16, wherein the first display panel is a polymer network liquid crystal display panel, and the second display panel is one of a liquid crystal display panel or an organic light emitting diode display panel.
18. The display device according to any one of claims 13 to 16, wherein the display device is a wearable device.
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