Transparent display device and preparation method

Abstract

The disclosed embodiments provide a transparent display device and a preparation method, which relate to the field of display technology and can improve contrast. The transparent display device includes a liquid crystal box and a light source arranged opposite to the side thereof. The liquid crystal box includes a first substrate, a second substrate, a first electrode on the first substrate, a second electrode on the first substrate or the second substrate, a liquid crystal layer, a plurality of signal lines and a shading pattern. The liquid crystal layer sandwiched between the first substrate and the second substrate includes polymer molecules and liquid crystal molecules, which are used to cause total reflection or scattering of light incident on the liquid crystal layer under the control of the electric field provided by the first electrode and the second electrode. At least one of the plurality of signal lines on the first substrate and in the display area has a bottom surface close to the first substrate and a reflective side surface connected to the bottom surface and facing the light source, and the slope angle formed by the reflective side surface and the bottom surface is an acute angle. The shading pattern is on the second substrate and on the reflection path after the light emitted by the light source is irradiated to the reflective side surface.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a transparent display device and a preparation method thereof. Background Art

[0002] With the development of display technology, transparent display devices are gradually added to the display market. A transparent display device is a display device that allows users to simultaneously view the display image on the transparent display device and the scene or object behind the transparent display device. The transparent display device can achieve the fusion and interaction of the display image on the display screen and the scene or object behind the transparent display device, thereby bringing users a new, rich and expressive visual experience. Summary of the invention

[0003] Embodiments of the present disclosure provide a transparent display device and a manufacturing method thereof, which can improve contrast.

[0004] To achieve the above objectives, the embodiments of the present disclosure adopt the following technical solutions:

[0005] In one aspect, a transparent display device is provided. The transparent display device includes a liquid crystal box and a light source. The light source is arranged opposite to the side of the liquid crystal box. The liquid crystal box has a display area. The liquid crystal box includes a first substrate, a second substrate, a first electrode, a second electrode, a liquid crystal layer, a plurality of signal lines and a shading pattern. The first electrode is arranged on the first substrate. The second electrode is arranged on the first substrate or on the second substrate. The liquid crystal layer is sandwiched between the first substrate and the second substrate; the liquid crystal layer includes polymer molecules and liquid crystal molecules; the liquid crystal layer is configured to cause total reflection or scattering of light incident on the liquid crystal layer under the control of the electric field provided by the first electrode and the second electrode. The plurality of signal lines are arranged on the first substrate and located in the display area, wherein at least one signal line has a bottom surface close to the first substrate and a reflective side surface connected to the bottom surface and facing the light source, and the slope angle formed by the reflective side surface and the bottom surface is an acute angle. The shading pattern is arranged on the second substrate; the shading pattern is located on the reflection path after the light emitted by the light source is irradiated to the reflective side surface.

[0006] In some embodiments, an orthographic projection of at least one signal line among the plurality of signal lines on the first substrate is covered by an orthographic projection of the light shielding pattern on the first substrate.

[0007] In some embodiments, the orthographic projection of the at least one signal line on the first substrate has a first edge and a second edge, and the orthographic projection of the corresponding portion of the shading pattern on the first substrate has a third edge and a fourth edge. The corresponding portion of the shading pattern is a portion of the shading pattern whose orthographic projection on the first substrate covers the at least one signal line.

[0008] In the width direction of the at least one signal line, the first edge and the second edge are opposite to each other. The third edge is located on a side of the first edge away from the second edge, and the fourth edge is located on a side of the second edge away from the first edge. The sum of the spacing between the third edge and the first edge and the spacing between the fourth edge and the second edge is greater than or equal to 6 μm.

[0009] In some embodiments, a distance between the third edge and the first edge is equal to a distance between the fourth edge and the second edge.

[0010] In some embodiments, a ratio of a width of a bottom surface of a corresponding portion of the light-shielding pattern close to a side of the second substrate to a width of a bottom surface of the at least one signal line is 1 to 2.5.

[0011] In some embodiments, the relationship between the width d of the bottom surface of the at least one signal line and the width D of the bottom surface of the corresponding portion of the shading pattern close to the second substrate side is D=2Ltan(2γ+α-90°)+d.

[0012] Among them, L is the distance between the bottom surface of the at least one signal line and the bottom surface of the corresponding part of the shading pattern close to the second substrate side; γ is the slope angle formed by the reflective side surface and the bottom surface of the at least one signal line; α is the angle between the light incident on the reflective side surface of the at least one signal line and the bottom surface of the signal line.

[0013] In some embodiments, 0°≤α≤60°; 45°≤γ≤80°.

[0014] In some embodiments, the material of the plurality of signal lines includes metal.

[0015] In some embodiments, the plurality of signal lines include gate lines and data lines, and an extension direction of the gate lines intersects an extension direction of the data lines.

[0016] In some embodiments, the display area includes a plurality of pixel areas; the first electrode is located in each pixel area. The liquid crystal box further includes a thin film transistor disposed on the first substrate and located in each pixel area. The thin film transistor is closer to the first substrate than the first electrode. The thin film transistor includes a gate, an active layer, a source electrode, and a drain electrode. The gate electrode of the thin film transistor is coupled to the gate line, the source electrode of the thin film transistor is coupled to the data line, and the drain electrode of the thin film transistor is coupled to the first electrode.

[0017] In some embodiments, the orthographic projection of the light-shielding pattern on the first substrate also covers the thin film transistor.

[0018] In some embodiments, the plurality of signal lines further include power lines. The power lines and the data lines extend in the same direction and are spaced apart; and the power lines and the data lines are made of the same material.

[0019] In some embodiments, the liquid crystal box further includes a first conductive pattern, a second conductive pattern, and a third conductive pattern. The first conductive pattern is disposed in the same layer as the first electrode. The second conductive pattern is disposed in the same layer as the data line. The third conductive pattern is disposed in the same layer as the gate line. The first conductive pattern is coupled to the power line and the third conductive pattern. The second conductive pattern is coupled to the drain of the thin film transistor. The orthographic projection of the third conductive pattern on the first substrate overlaps with the orthographic projection of the second conductive pattern on the first substrate.

[0020] In some embodiments, the orthographic projection of the light-shielding pattern on the first substrate covers the orthographic projection of the second conductive pattern on the first substrate and the orthographic projection of the third conductive pattern on the first substrate.

[0021] In some embodiments, the first conductive pattern and the gate line extend in the same direction. The first conductive pattern includes an unshielded portion located between two adjacent first electrodes, the unshielded portion does not overlap with the second conductive pattern and the orthographic projection of the first conductive pattern on the first substrate; the orthographic projection of the unshielded portion on the second substrate does not overlap with the orthographic projection of the shading pattern on the second substrate.

[0022] In some embodiments, the second electrode is located on the second substrate, and the second electrode is close to the first substrate relative to the light shielding pattern.

[0023] In some embodiments, the second electrode includes a second electrode body and a plurality of openings disposed on the second electrode body. The plurality of openings include at least one of a first opening, a second opening, and a third opening. In the case where the liquid crystal box includes a thin film transistor, the orthographic projection of the first opening on the first substrate overlaps or substantially overlaps with the orthographic projection of the thin film transistor on the first substrate. In the case where the plurality of signal lines include a gate line and a data line, the orthographic projection of the second opening on the first substrate overlaps with the orthographic projection of the data line on the first substrate. The orthographic projection of the third opening on the first substrate overlaps with the orthographic projection of the gate line on the first substrate.

[0024] In some embodiments, an orthographic projection of at least one of the plurality of openings on the second substrate does not overlap with an orthographic projection of the light-shielding pattern on the second substrate.

[0025] In some embodiments, the liquid crystal box further comprises a plurality of spacers. The plurality of spacers are disposed on the second substrate; the plurality of spacers are farther from the second substrate than the light shielding pattern. In the case where the liquid crystal box comprises a first conductive pattern, an orthographic projection of one spacer on the first substrate overlaps with an orthographic projection of the first conductive pattern on the first substrate. The orthographic projections of the plurality of spacers on the second substrate do not overlap with the orthographic projection of the light shielding pattern on the second substrate.

[0026] In some embodiments, the light source includes a first color light emitting device, a second color light emitting device, and a third color light emitting device. The light source is configured to respond to a pulse control signal so that the first color light emitting device, the second color light emitting device, and the third color light emitting device sequentially and periodically emit light of corresponding colors.

[0027] On the other hand, a method for preparing a transparent display device is provided. The preparation method includes: forming a plurality of signal lines on a first substrate and in a display area; forming a shading pattern on a second substrate; forming a first electrode on the first substrate, and forming a second electrode on the first substrate or on the second substrate; forming a liquid crystal layer between the first substrate and the second substrate to obtain a liquid crystal box; and providing a light source opposite to the side of the liquid crystal box to obtain the transparent display device. At least one of the plurality of signal lines has a bottom surface close to the first substrate and a reflective side surface connected to the bottom surface and facing the light source; the slope angle formed by the reflective side surface and the bottom surface is an acute angle; and the shading pattern is located on the reflection path of the light emitted by the light source after irradiating the reflective side surface. The liquid crystal layer includes polymer molecules and liquid crystal molecules; the liquid crystal layer is configured to cause total reflection or scattering of light incident to the liquid crystal layer under the control of the electric field provided by the first electrode and the second electrode.

[0028] In summary, the embodiments of the present disclosure provide a transparent display device and a preparation method, wherein the reflective side surface of at least one signal line in the liquid crystal box faces the light source, so that the light emitted by the light source is reflected after being irradiated on the reflective side surface in the signal line, and the slope angle formed by the reflective side surface and the bottom surface is an acute angle, so that the light reflected on the reflective side surface will be emitted to the second substrate. Since the shading pattern is located on the reflection path of the light emitted by the light source after being irradiated on the reflective side surface, the shading pattern can block the light reflected on the reflective side surface, avoiding the display effect being affected by the reflected light emitted from the liquid crystal box, thereby improving the contrast of the transparent display device and improving the viewing effect of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0030] Figure 1 is a structural diagram of a transparent display device according to the related art;

[0031] Figure 2 is a structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0032] Figure 3 for Figure 2 A cross-sectional view of the transparent display device along the BB' direction;

[0033] Figure 4 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0034] Figure 5 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0035] Figure 6 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0036] Figure 7 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0037] Figure 8 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0038] Fig. 9 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0039] Fig.10 is a structural diagram of a liquid crystal box according to some embodiments of the present disclosure;

[0040] Fig.11A is a top view of a first pattern layer according to some embodiments of the present disclosure;

[0041] Fig. 11B is a top view of a second pattern layer according to some embodiments of the present disclosure;

[0042] Fig. 11C is a top view of a third pattern layer according to some embodiments of the present disclosure;

[0043] Fig.11D for Fig.10 A cross-sectional view of the liquid crystal cell along the CC' direction;

[0044] Fig. 12A is another structural diagram of a liquid crystal box according to some embodiments of the present disclosure;

[0045] Fig. 12B is a top view of a shading pattern according to some embodiments of the present disclosure;

[0046] Fig.13 is another structural diagram of a liquid crystal box according to some embodiments of the present disclosure;

[0047] Fig.14 for Fig.13 A cross-sectional view of the liquid crystal cell along the D-D' direction;

[0048] Fig.15 for Fig.13 A cross-sectional view of the liquid crystal cell along the EE' direction;

[0049] Fig.16 is a structural diagram of a second electrode according to some embodiments of the present disclosure;

[0050] Fig.17 is another structural diagram of a liquid crystal box according to some embodiments of the present disclosure;

[0051] Fig.18 is another structural diagram of a liquid crystal box according to some embodiments of the present disclosure;

[0052] Fig.19 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0053] Fig. 20 for Fig.19 A cross-sectional view of the transparent display device along the G-G' direction;

[0054] Fig.21 is another structural diagram of a transparent display device according to some embodiments of the present disclosure;

[0055] Fig. 22 is a structural diagram of a light source according to some embodiments of the present disclosure;

[0056] Fig.23 A preparation flow chart of a transparent display device according to some embodiments of the present disclosure;

[0057] Fig.24 A diagram of a preparation process of a second electrode according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0058] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0059] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0060] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0061] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0062] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0063] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0064] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0065] As used herein, "substantially," "about," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0066] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0067] When the transparent display device is in a working state, it can display an image (also referred to as an image or a picture) so that the viewer can see the image displayed by the transparent display device and the real scene on the side of the transparent display device away from the viewer (for example, objects placed there, passers-by, etc.); when the transparent display device is not in a working state, it is in a transparent or translucent state, like a piece of glass, and the viewer can see the real scene on the other side through the transparent display device.

[0068] In related technologies, such as Figure 1 As shown, the transparent display device 1' includes a liquid crystal box 10' and a light source 20'. In a direction perpendicular to the thickness of the liquid crystal box 10', the light source 20' is located on the side of the liquid crystal box 10', and light enters from the side of the liquid crystal box 10'. As the light emitted by the light source 20' propagates in the liquid crystal box 10', some film layers in the liquid crystal box 10' (such as metal wiring layers, etc.) will reflect or scatter the light, generating stray light. When the stray light is directed to the light-emitting surface of the liquid crystal box 10' and is emitted from the liquid crystal box 10', when the user is viewing the transparent display device 1', the stray light will enter the human eye, resulting in a decrease in display contrast, affecting the user's viewing effect.

[0069] The embodiment of the present disclosure provides a transparent display device 1, such as Figure 2 and Figure 3As shown, the transparent display device 1 includes a liquid crystal box 10 and a light source 20. The light source 20 is disposed opposite to a side surface of the liquid crystal box 10. Exemplarily, the thickness of the light source 20 is greater than or equal to the thickness of the liquid crystal box 10.

[0070] It can be understood that the liquid crystal box 10 has a light emitting surface and a bottom surface, and along the thickness direction of the liquid crystal box 10, the light emitting surface and the bottom surface are opposite to each other, and the side surface of the liquid crystal box 10 is located between the light emitting surface and the bottom surface. In the direction perpendicular to the thickness of the liquid crystal box 10, the light source 20 is opposite to the side surface of the liquid crystal box 10.

[0071] like Figure 2 and Figure 3 As shown, the liquid crystal cell 10 has a display area (Active Area, AA). The liquid crystal cell 10 includes a first substrate 101 and a second substrate 201. The first substrate 101 and the second substrate 201 are arranged opposite to each other.

[0072] like Figure 4 As shown, the liquid crystal box 10 further includes a first electrode 130 and a second electrode 220. Exemplarily, the first electrode 130 is a pixel electrode, and the second electrode 220 is a common electrode. The first electrode 130 and the second electrode 220 may both be located on the first substrate 101, and the first electrode 130 and the second electrode 220 may be located on the same layer or on different layers. In this case, an array substrate including the first substrate 101, the first electrode 130 and the second electrode 220, and an opposing substrate including the second substrate 201 may be obtained; or the first electrode 130 is located on the first substrate 101, and the second electrode 220 is located on the second substrate 201. In this case, an array substrate including the first substrate 101 and the first electrode 130, and an opposing substrate including the second substrate 201 and the second electrode 220 may be obtained.

[0073] The first electrode 130 and the second electrode 220 are both transparent. The materials of the first electrode 130 and the second electrode 220 can both be transparent conductive materials, such as ITO (indium tin oxide).

[0074] like Figure 4As shown, the liquid crystal box 10 further includes a liquid crystal layer 300. The liquid crystal layer 300 is sandwiched between the first substrate 101 and the second substrate 201. That is, the liquid crystal layer 300 is located between the array substrate and the opposing substrate that are arranged oppositely. The liquid crystal layer 300 includes liquid crystal molecules 301 and polymer molecules 302. Exemplarily, the liquid crystal layer 300 can use polymer stabilized liquid crystal (PolymerStabilized Liquid Crystal, PSLC) or polymer dispersed liquid crystal (Polymer-dispersed LiquidCrystal, PDLC). The liquid crystal layer 300 is configured to cause total reflection or scattering of light incident on the liquid crystal layer 300 under the control of the electric field provided by the first electrode 130 and the second electrode 220.

[0075] It is understood that when the liquid crystal box 10 is not displaying, no electric field is formed between the first electrode 130 and the second electrode 220, and the refractive index of the liquid crystal molecule 301 is the same as the refractive index of the polymer molecule 302. At this time, the light from the light source 20 is totally reflected and propagated in the liquid crystal box 10, and will not be emitted from the side of the second substrate 201 away from the first substrate 101. The transparent display device 1 is transparent, and the AA area is transparent. Exemplarily, when the AA area is transparent, the transmittance of the transparent display device 1 can be above 65%. When the transparent display device 1 is displaying, the first electrode 130 and the second electrode 220 in the area to be displayed are respectively applied with an electric signal, and an electric field is formed. The refractive index of the liquid crystal molecule 301 within the electric field range changes, so that the light incident on the liquid crystal molecule is scattered, and the scattered light is emitted from the side of the second substrate 201 away from the first substrate 101, so that the transparent display device 1 can realize display. At this time, the area to be displayed is in a scattered state, and no electric field is formed between the first electrode 130 and the second electrode 220 in the remaining non-display area, so that the light incident on the non-display area is totally reflected. At this time, the non-display area is in a transparent state.

[0076] It should be noted that Figure 4 It is only a schematic diagram, and does not show the specific structure of each film layer in the liquid crystal box 10, nor the distribution of the liquid crystal molecules 301 and the polymer molecules 302 in the liquid crystal layer 300. In actual application, it can be designed as needed.

[0077] Among them, Figure 2 and Figure 3 As shown, the liquid crystal box 10 further includes a plurality of signal lines 110 disposed on the first substrate 101 and located in the AA region. Figure 3As shown, at least one signal line 110 among the plurality of signal lines 110 has a bottom surface 110A and a reflective side surface 110B. The bottom surface 110A is a surface of at least one signal line 110 close to the first substrate 101. The reflective side surface 110B is connected to the bottom surface 110A and faces the light source 20. The slope angle γ formed by the reflective side surface 110B and the bottom surface 110A is an acute angle.

[0078] It can be understood that the orthographic projection of the reflective side surface 110B on the plane where the light emitting surface of the light source 20 is located has a certain area, that is, the shape of the orthographic projection is a figure with a certain area, not a line segment.

[0079] like Figure 2 and Figure 3 As shown, the liquid crystal cell 10 further includes a light shielding pattern 210 disposed on the second substrate 201. The light shielding pattern 210 is located on the reflection path of the light emitted by the light source 20 after irradiating the light reflecting side surface 100B.

[0080] It should be noted that, for the convenience of description, Figure 3 Only the first substrate 101 and the signal line 110 and the second substrate 201 and the light shielding pattern 210 are shown, and other film layer structures in the liquid crystal cell 10 are not shown.

[0081] Exemplarily, the first substrate 101 and the second substrate 201 may include a rigid substrate (or hard substrate) such as glass, or a flexible substrate such as PI (Polyimide), and may also include a thin film such as a buffer layer disposed on the rigid substrate or the flexible substrate. The shading pattern 210 may be a black matrix (BM), and the material of the shading pattern 210 may include resin. The light transmittance of the shading pattern 210 to light is low, for example, the light transmittance of the shading pattern 210 with a length of 1 μm to light is 0.0001.

[0082] It can be understood that the light emitting surface of the light source 20 is close to the side of the liquid crystal box 10, and the light emitted by the light source 20 enters the liquid crystal box 10 and propagates in a direction perpendicular to the thickness of the liquid crystal box 10. The reflective side surface 110B is close to the light emitting surface of the light source 20, and the light emitted by the light source 20 will be irradiated on the reflective side surface 110B. The light emitted by the light source 20 is reflected after being irradiated on the reflective side surface 110B in the signal line 110. Since the slope angle γ formed by the reflective side surface 110B and the bottom surface 110A is an acute angle, the light reflected on the reflective side surface 110B will be emitted to the second substrate 201. In this case, since the shading pattern 210 is located on the reflection path after the light emitted by the light source 20 is irradiated on the reflective side surface 110B, the shading pattern 210 can block the light reflected on the reflective side surface 110B, thereby avoiding the display effect being affected by the reflected light emitted from the liquid crystal box 10, thereby improving the contrast of the transparent display device 1 and improving the viewing effect of the user.

[0083] Therefore, in the transparent display device 1 provided by the embodiment of the present disclosure, the reflective side surface 110B in at least one signal line 110 in the liquid crystal box 10 faces the light source 20, so that the light emitted by the light source 20 is reflected after being irradiated on the reflective side surface 110B in the signal line 110, and the slope angle γ formed by the reflective side surface 110B and the bottom surface 110A is an acute angle, so that the light reflected on the reflective side surface 110B will be emitted to the second substrate 201. Since the shading pattern 210 is located on the reflection path after the light emitted by the light source 20 is irradiated on the reflective side surface 110B, the shading pattern 210 can block the light reflected on the reflective side surface 110B, avoiding the display effect being affected by the reflected light emitted from the liquid crystal box 10, thereby improving the contrast of the transparent display device 1 and improving the viewing effect of the user.

[0084] In some embodiments, Figure 2 and Figure 5 As shown, some of the signal lines 110 have a first extension direction F1. The first extension direction F1 is the normal direction of the side surface of the liquid crystal box 10 opposite to the light source 20 (for example, Figure 2 in the Y direction), perpendicular to each other (such as Figure 5 ), or intersect and the angle δ is an acute angle (as shown in Figure 5 The orthographic projection of the light shielding pattern 210 on the first substrate 101 covers the orthographic projection of the signal line 1101 having the first extension direction F1 on the first substrate 101 .

[0085] It can be understood that, of the two opposite side surfaces of the signal line 110 (the signal line can be regarded as the first signal line) along the width direction (i.e., along the direction perpendicular to the first extension direction F1 in the plane where the first substrate 101 is located), one side surface close to the light source 20 is the reflective side surface 110B.

[0086] Exemplarily, the light source 20 may include at least one light bar. The transparent display device 1 may include at least one light source 20, and one light source 20 is disposed opposite to one side of the liquid crystal box 10. Figure 2 As shown, the transparent display device 1 includes a light source 20, and the light source 20 is located on a side of the liquid crystal box 10. Figure 6 As shown, the transparent display device 1 includes two light sources 20 , which are respectively located on two sides connected to the liquid crystal box 20 , and the two light sources 20 are connected to each other to form an integrated structure.

[0087] It can be understood that, since the normal direction of the light emitting surface of the light source 20 is substantially parallel to the normal direction of the side surface of the liquid crystal box 10 arranged opposite to the light source 20, the propagation direction of the light emitted by the light source 20 is substantially parallel to the normal direction of the side surface of the liquid crystal box 10 arranged opposite to the light source 20, and the propagation direction of the light emitted by the light source 20 is perpendicular to or intersects with the first extension direction F1. At this time, since the orthographic projection of the shading pattern 210 on the first substrate 101 covers the orthographic projection of the signal line 110 having the first extension direction F1 on the first substrate 101, after the light emitted by the light source 20 is irradiated to the reflective side surface 110B of the signal line 110 having the first extension direction F1, the light reflected on the reflective side surface 110B will be blocked by the shading pattern 210 and will not be emitted from the liquid crystal box 10, thereby preventing the reflected light from affecting the viewing effect of the user, thereby improving the display effect of the transparent display device 1.

[0088] In some embodiments, Figure 2 and Figure 7 As shown, some of the signal lines 110 have a second extension direction F2 (these signal lines can be regarded as second signal lines). The second extension direction F2 is in the direction of the normal line of the side surface of the liquid crystal box 10 opposite to the light source 20 (for example, Figure 2 The Y direction in FIG. 2 is parallel or approximately parallel to the Y direction in FIG. 2 .

[0089] It can be understood that since the normal direction of the light emitting surface of the light source 20 is roughly parallel to the normal direction of the side of the liquid crystal box 10 set opposite to the light source 20, the propagation direction of the light emitted by the light source 20 is parallel or roughly parallel to the normal direction of the side of the liquid crystal box 10 set opposite to the light source 20, and the propagation direction of the light emitted by the light source 20 is parallel or roughly parallel to the second extension direction F2.

[0090] The orthographic projection of the light shielding pattern 210 on the first substrate 101 covers the orthographic projection of the signal line 110 having the second extension direction F2 on the first substrate 101. In this case, since the signal line 110 having the second extension direction F2 can reflect light, the light emitted by the light source 20 will be reflected when irradiated on the signal line 110, and the reflected light will be emitted toward the second substrate 201 and emitted from the liquid crystal box 10. At this time, the light shielding pattern 210 can shield the light reflected on the signal line 110 having the second extension direction F2, thereby avoiding the problem of reducing the display contrast due to the emission of the reflected light.

[0091] Alternatively, the orthographic projection of the light shielding pattern 210 on the first substrate 101 does not overlap with the orthographic projection of the signal line 110 having the second extension direction F2 on the first substrate 101. In this case, since the propagation direction of the light emitted by the light source 20 is parallel or substantially parallel to the second extension direction F2, the area of ​​the signal line 110 having the second extension direction F2 irradiated by the light emitted by the light source 20 is small, and the light reflected on the signal line 110 having the second extension direction F2 is small or no light is reflected. At this time, the orthographic projection of the light shielding pattern 210 on the first substrate 101 does not cover the signal line 110 having the second extension direction F2, which can avoid the influence of the light shielding pattern 210 with low transmittance on the aperture ratio and transmittance of the transparent display device 1, thereby improving the aperture ratio of the transparent display device 1, and improving the transmittance and transparency of the transparent display device 1.

[0092] Exemplarily, when the orthographic projection of the shading pattern 210 on the first substrate 101 covers the orthographic projection of the signal line 110 having the first extension direction F1 on the first substrate 101 , the aperture ratio of the transparent display device 1 can be increased by 5.64% compared to when the orthographic projection of the shading pattern 210 on the first substrate 101 covers all signal lines 110 .

[0093] It should be noted that, for two signal lines 110 that cross each other, when the orthographic projection of the shading pattern 210 on the first substrate 101 overlaps with one of the signal lines 110, the other signal line 110 will inevitably overlap with the orthographic projection of the shading pattern 210 on the first substrate 101 at the intersection of the two signal lines 110. In this regard, the embodiments of the present disclosure approximately assume that the other signal line 110 does not overlap with the orthographic projection of the shading pattern 210 on the first substrate 101. For example, Figure 2As shown, the orthographic projection of the signal line 110 having the first extension direction F1 on the first substrate 101 overlaps with the orthographic projection of the signal line 110 having the second extension direction F2 on the first substrate 101. At this time, when the orthographic projection of the shading pattern 210 on the first substrate 101 covers the orthographic projection of the signal line 110 having the first extension direction F1 on the first substrate 101, the orthographic projection of the shading pattern 210 on the first substrate 101 will inevitably cover the part of the orthographic projection of the signal line 110 having the second extension direction F2 on the first substrate 101 that overlaps with the orthographic projection of the signal line 110 having the first extension direction F1 on the first substrate 101. At this time, it is considered that the orthographic projection of the shading pattern 210 on the first substrate 101 does not overlap with the orthographic projection of the signal line 110 having the second extension direction F2 on the first substrate 101.

[0094] Exemplarily, the material of the plurality of signal lines 110 includes metal, such as aluminum (Al), molybdenum (Mo), copper (Cu), or silver (Ag). In this case, the metal can reflect light, and the light emitted by the light source 20 will be reflected when it is irradiated on the signal line 110, and the reflected light can be shielded by the shading pattern 210 covering the signal line 110, so as to prevent the reflected light from being emitted from the liquid crystal box 10.

[0095] In some embodiments, reference Figure 8 , the orthographic projection of at least one signal line 110 among the plurality of signal lines 110 on the first substrate 101 is covered by the orthographic projection of the shading pattern 210 on the first substrate 101. Exemplarily, the width W1 of the orthographic projection of at least one signal line 110 on the first substrate 101 is less than or equal to the width W2 of the orthographic projection of the corresponding portion of the shading pattern 210 on the first substrate 101, that is, W1≤W2. The corresponding portion of the shading pattern 210 is the portion of the shading pattern 210 whose orthographic projection on the first substrate 101 covers the at least one signal line 110.

[0096] It can be understood that the shading area of ​​the shading pattern 210 for the reflected light of the signal line 110 is greater than or equal to the area where the signal line 110 is located, so that the reflected light can be blocked more comprehensively, thereby improving the shading effect of the shading pattern 210 on the reflected light, thereby improving the display effect of the transparent display device 1.

[0097] In some embodiments, Figure 8 As shown, the orthographic projection of at least one signal line 110 on the first substrate 101 has a first edge H1 and a second edge H2. Figure 8In the Y direction, or in the plane where the first substrate 101 is located and is perpendicular to the extending direction of at least one signal line 110, the first edge H1 and the second edge H2 are located opposite to each other.

[0098] The orthographic projection of the corresponding part of the light-shielding pattern 210 on the first substrate 101 has a third edge H3 and a fourth edge H4. The third edge H3 is located on a side outside the first edge H1 away from the second edge H2, and the fourth edge H4 is located on a side outside the second edge H2 away from the first edge H1. For example, the first edge H1 and the third edge H3 extend in the same direction (for example, the first edge H1 is parallel to the third edge H3), and the second edge H2 and the fourth edge H4 extend in the same direction (for example, the second edge H2 is parallel to the fourth edge H4). At this time, the width W1 of the orthographic projection of at least one signal line 110 on the first substrate 101 is less than or equal to the width W2 of the orthographic projection of the corresponding part of the light-shielding pattern 210 on the first substrate 101, that is, W1<W2. Exemplarily, the first edge H1 and the third edge H3 extend in the same direction, and the second edge H2 and the fourth edge H4 extend in the same direction.

[0099] Among them, the sum of the distance between the third edge H3 and the first edge H1 (i.e., the first distance Z1) and the distance between the fourth edge H4 and the second edge H2 (i.e., the second distance Z2) is greater than or equal to 6μm, that is, the sum of the first distance Z1 and the second distance Z2 is greater than or equal to 6μm, (Z1+Z2)≥6μm.

[0100] Exemplarily, the sum of the first interval Z1 and the second interval Z2 is 6 μm to 12 μm. For example, the sum of the first interval Z1 and the second interval Z2 is 6.5 μm, 8 μm or 10 μm.

[0101] It can be understood that the width of the portion of the light shielding pattern 210 covering the signal line 110 in the orthographic projection on the first substrate 101 is greater than the width of the signal line 110. In this way, in the extension direction perpendicular to at least one signal line 110, the signal line 110 is covered by the light shielding pattern 210 except for the opposite sides, so that the reflected light irradiated to the outer side of the first edge H1 and the outer side of the second edge H2 of the signal line 110 can be shielded by the light shielding pattern 210, which increases the shielding range of the light shielding pattern 210 on the reflected light of the signal line 110, so that the reflected light can be more fully shielded, and the shielding effect of the light shielding pattern 210 on the reflected light is improved, thereby improving the display effect of the transparent display device 1.

[0102] In some embodiments, the spacing between the third edge H3 and the first edge H1 (i.e., the first spacing Z1) is equal to the spacing between the fourth edge H4 and the second edge H2 (i.e., the second spacing Z2), that is, the first spacing Z1 is equal to the second spacing Z2, Z1=Z2. Wherein, the first spacing Z1 and the second spacing Z2 are both greater than 3μm. Exemplarily, Z1=Z2=3μm-6μm, for example, 3.5μm, 4μm or 5μm.

[0103] It can be understood that, for the signal line 110 whose orthographic projection on the first substrate 101 is covered by the orthographic projection of the shading pattern 210 on the first substrate 101, the first center line M1 of the signal line 110 coincides with the second center line M2 of the portion of the shading pattern 210 covering the signal line 110. The first center line M1 and the second center line M2 are both aligned with the extension direction of the signal line 110 (e.g. Figure 8 In the plane where the first substrate 101 is located, along the direction perpendicular to the extension direction of the signal line 110 (such as Figure 8 In the Y direction), that is, along the width direction of the signal line 110, the first center line M1 divides the signal line 110 into equal parts, so that the distance from the first edge H1 to the first center line M1 is equal to the distance from the second edge H2 to the first center line M1, and the second center line M2 divides the portion of the shading pattern 210 covering the signal line 110 into equal parts, so that the distance from the third edge H3 to the second center line M2 is equal to the distance from the fourth edge H4 to the second center line M2.

[0104] In this case, in the extension direction perpendicular to at least one signal line 110, that is, in the width direction of at least one signal line 110, the shielding areas of the light shielding pattern 210 on the opposite sides of the signal line 110 are of the same size. In this way, after the light is reflected on the signal line 110, the shielding degree of the reflected light by the light shielding pattern 210 is the same on the opposite sides perpendicular to the extension direction of the signal line 110, thereby avoiding uneven shielding of the reflected light of the signal line 110 by the light shielding pattern 210, which causes a difference in contrast between the two opposite sides of the signal line 110 perpendicular to its extension direction, thereby affecting the display effect of the transparent display device 1.

[0105] In some embodiments, reference Fig. 9 The ratio of the width D of the bottom surface 210A of the corresponding portion of the light shielding pattern 210 close to the second substrate 201 to the width d of the bottom surface 100A of at least one signal line 110 is 1 to 2.5, that is, D=d to 2.5d. For example, D=1.3d to 2d.

[0106] In this case, after the light emitted by the light source 20 is reflected on at least one signal line 110, the reflected light is emitted to the second substrate 201 and can be almost completely blocked by the shading pattern 210, so that the reflected light will not be emitted from the liquid crystal box 10, thereby improving the shielding effect of the shading pattern 210 on the reflected light, thereby improving the display effect of the transparent display device 1.

[0107] It should be noted that, for the convenience of description, Fig. 9 Only the first substrate 101 and the signal line 110 and the second substrate 201 and the light shielding pattern 210 are shown, and other film layer structures in the liquid crystal cell 10 are not shown.

[0108] In some embodiments, reference Fig. 9 The relationship between the width d of the bottom surface 110A of at least one signal line 110 and the width D of the bottom surface 210A of the corresponding part of the shading pattern 210 on the first substrate 101 close to the second substrate 201 is D=2L×tan(2γ+α-90°)+d.

[0109] Wherein, L is the distance between the bottom surface 110A of at least one signal line 110 and the bottom surface 210A of the corresponding portion of the light shielding pattern 210 close to the second substrate 201. γ is the slope angle formed by the reflective side surface 110B of at least one signal line 110 and the bottom surface 110A. α is the angle between the light incident on the reflective side surface 110B of at least one signal line 110 and the bottom surface 110A of the signal line 110.

[0110] Among them, 0°≤α≤60°, 45°≤γ≤80°.

[0111] Exemplarily, the width D of the bottom surface 210A of the corresponding portion of the shading pattern 210 close to the second substrate 201 is greater than the width d of the bottom surface 110A of the signal line 110. In the width direction of the signal line 110, on one of the two opposite sides of the signal line 110, the distance between the edge of the orthogonal projection of the signal line 110 on the first substrate 101 and the edge of the orthogonal projection of the portion of the shading pattern 210 covering the signal line 110 on the first substrate 101 is equal to the distance between the edge of the orthogonal projection of the signal line 110 on the first substrate 101 and the edge of the orthogonal projection of the portion of the shading pattern 210 covering the signal line 110 on the other side of the two opposite sides of the signal line 110. In this case, as Fig. 9As shown, the incident angle θ of the light emitted by the light source 20 onto the reflective side surface 110B is (90°-α-γ), the angle β between the light reflected by the reflective side surface 110B and the thickness direction of the signal line 110 (i.e., the direction perpendicular to the bottom surface 110A in the signal line 110) is (90°-α-2θ), tanβ=(Dd) / (2L), and D=2L×tan(2γ+α-90°)+d can be obtained.

[0112] Therefore, in the actual production process, the width D of the bottom surface 210A on the second substrate 201 side of the shading pattern 210 whose orthographic projection on the first substrate 101 covers the portion of the signal line 110 on the side close to the second substrate 201 can be adjusted according to the spacing L between the bottom surface 110A of the signal line 110 and the corresponding portion of the shading pattern 210 on the side close to the second substrate 201, the slope angle γ formed by the reflective side surface 110B of the signal line 110 and the bottom surface 110A, the angle α between the light incident on the reflective side surface 110B of the signal line 110 and the bottom surface 110A of the signal line 110, and the width d of the bottom surface 110A of the signal line 110, so as to ensure that the shading pattern 210 can effectively block the light reflected by the signal line 110.

[0113] It should be noted that the width of the corresponding portion of the shading pattern 210 (the portion of the shading pattern 210 whose orthographic projection on the first substrate 101 covers the signal line 110) close to the bottom surface 210A on the second substrate 201 side is related to the spacing between the bottom surface 110A of the signal line 110 and the bottom surface 210A of the portion of the shading pattern 210 corresponding to the signal line 110 close to the second substrate 201 side, the slope angle formed by the reflective side surface 110B of the signal line 110 and the bottom surface 110A, the angle between the light incident on the reflective side surface 110B of the signal line 110 and the bottom surface 110A of the signal line 110, and the width of the bottom surface 110A of the signal line 110, but has nothing to do with the slope angle of the shading pattern 210 (i.e. the angle between the inclined side surface and the bottom surface of the shading pattern 210).

[0114] Exemplarily, the thickness of the shading pattern 210 is 0.8 μm to 2 μm, for example, the thickness of the shading pattern 210 may be 1.1 μm, 1.5 μm or 1.8 μm. In this case, the thickness of the transparent display device 1 may be prevented from being too large due to the thickness of the shading pattern 210, and the transparent display device 1 may be made thinner and lighter.

[0115] In some embodiments, Fig.10 As shown, the AA region includes a plurality of pixel regions P. The liquid crystal cell 10 further includes a thin film transistor (TFT) disposed on the first substrate 101 and located in each pixel region P.

[0116] It should be noted that the arrangement of the plurality of pixel regions P can be set according to actual conditions, and the present disclosure does not limit this. Fig.10 The plurality of pixel regions P in the array are arranged in an array form, wherein Fig.10 The pixel regions P arranged in a row along the X direction are called pixel regions in the same row, and the pixel regions P arranged in a row along the Y direction are called pixel regions in the same column.

[0117] In some embodiments, Fig. 12A , Fig.13 and Fig.14 As shown, the orthographic projection of the light shielding pattern 210 on the first substrate 101 also covers the TFT.

[0118] It is understandable that if Fig.14 As shown, the TFT includes a gate electrode G, an active layer ACT, a source electrode S, and a drain electrode D. The liquid crystal cell 10 further includes a gate insulating layer GI disposed between the gate electrode G and the active layer ACT. Fig.14 The gate G is located on the side of the active layer ACT close to the first substrate 101, and the source S and the drain D are located on the side of the active layer ACT away from the first substrate 101. In this case, the TFT is a bottom-gate TFT. Exemplarily, the materials of the gate G, the source S, and the drain D include metal. The gate G, the source S, and the drain D can all reflect light.

[0119] In this case, the light emitted by the light source 20 is irradiated on the TFT, for example, on at least one of the gate G, the source S and the drain D, and reflection occurs, and the reflected light is emitted to the second substrate 201. In this case, the orthographic projection of the light shielding pattern 210 on the first substrate 101 also covers the TFT, and the light reflected by the TFT and emitted to the second substrate 201 can be shielded, thereby preventing the reflected light from emitting from the liquid crystal box 10 and affecting the viewing effect of the user, thereby improving the display effect of the transparent display device 1.

[0120] In some embodiments, Fig.10 As shown, the plurality of signal lines 110 include gate lines GL and data lines DL. The extension direction of the gate lines GL (eg Fig.10 The X direction in the figure) and the extending direction of the data line DL (for example Fig.10 in the Y direction).

[0121] The TFT is coupled to the gate line GL and the data line DL. For example, when a plurality of pixel areas P are arranged in an array, the gate line GL is located between two adjacent rows of pixel areas, and the TFTs in a row of pixel areas P are coupled to one gate line GL; the data line DL is located between two adjacent columns of pixel areas, and the TFTs in a column of pixel areas P are coupled to one data line DL.

[0122] The gate line GL is made of the same material as the gate G of the TFT, and the two are arranged in the same layer, and can be formed synchronously in the process (for example, formed by the same film layer composition), thereby saving process steps. The gate line GL is coupled to the gate G of the TFT. Exemplarily, a portion of the gate line GL can serve as the gate G of the TFT. The data line DL is made of the same material as the source S and drain D of the TFT, and the two are arranged in the same layer, and can be formed synchronously in the process, thereby saving process steps. The data line DL is coupled to the source S of the TFT. Exemplarily, a portion of the data line DL can serve as the source S.

[0123] like Fig.13 As shown, the orthographic projections of the gate lines GL and the data lines DL on the first substrate 101 are covered by the orthographic projections of the light shielding pattern 210 on the first substrate 101. It can be understood that the light emitted by the light source 20 is reflected by the gate lines GL and the data lines DL, and the reflected light is emitted to the second substrate 201. The light shielding pattern 210 can shield the reflected light from the gate lines GL and the data lines DL, and prevent the reflected light from emitting from the liquid crystal box 10.

[0124] As another example, Fig. 12A As shown, the orthographic projection of one of the gate line GL and the data line DL on the first substrate 101 is covered by the orthographic projection of the light shielding pattern 210 on the first substrate 101. In this case, the extension direction of the orthographic projection of one of the gate line GL and the data line DL covered by the orthographic projection of the light shielding pattern 210 on the first substrate 101 and the normal direction of the side surface of the liquid crystal box 10 arranged opposite to the light source 20 are perpendicular to each other, or intersect and the included angle is an acute angle. In this way, the problem of affecting the transmittance of the transparent display device 1 due to the low transmittance of the light shielding pattern 210 to light can be avoided.

[0125] Exemplarily, in the case where the orthographic projection of the gate line GL on the first substrate 101 is covered by the orthographic projection of the light shielding pattern 210 on the first substrate 101, in the process of forming the light shielding pattern 210 in the process, the mask plate used to form the gate line GL can be used to pattern the light shielding film to be formed with the light shielding pattern. In the case where the orthographic projection of the data line DL on the first substrate 101 is covered by the orthographic projection of the light shielding pattern 210 on the first substrate 101, in the process of forming the light shielding pattern 210 in the process, the mask plate used to form the data line DL can be used to pattern the light shielding film to be formed with the light shielding pattern.

[0126] In some embodiments, Fig.14 As shown, the liquid crystal cell 10 further includes a barrier layer 120 disposed on the first substrate 101. The barrier layer 120 is located between the pattern layer where the active layer ACT is located and the pattern layer where the source electrode S and the drain electrode D are located.

[0127] The barrier layer 120 is provided with a first via hole 121 and a second via hole 122. The first via hole 121 and the second via hole 122 penetrate the barrier layer 120. The source electrode S is coupled to the active layer ACT through the first via hole 121, and the drain electrode D is coupled to the active layer ACT through the second via hole 122.

[0128] It should be noted that the barrier layer 120 at least covers the channel region of the TFT. The channel region of the TFT refers to a region in the active layer ACT between the source electrode S and the drain electrode D of the TFT where a conductive channel can be formed under the action of an external voltage. In this case, in terms of process, the barrier layer 120 protects the active layer ACT, and can avoid the influence of the etching solution used in the subsequent film preparation process, for example, in the patterning process of the source electrode S and the drain electrode D, on the active layer ACT, thereby improving the stability of the active layer ACT.

[0129] In some embodiments, Fig.10 and Fig. 11B As shown, the plurality of signal lines 110 further include a power line 111. It is understood that, in the case where the second electrode 220 is a common electrode, the power line 111 is coupled to the second electrode 220. For example, the power line 111 is configured to transmit a common electrical signal.

[0130] The extending direction of the power line 111 is the same as the extending direction of the data line DL, for example, both extend along Fig.10 The power line 111 and the data line DL are made of the same material and are arranged in the same layer. They can be formed simultaneously in the process, thereby saving steps. The power line 111 and the data line DL are arranged at intervals, and the power line 111 and the data line DL are insulated from each other to avoid affecting the signal transmission of the power line 111 and the data line DL.

[0131] For example, when a plurality of pixel regions P are arranged in an array, the power line 111 may be located between two adjacent columns of pixel regions. Furthermore, when the power line 111 and the data line DL are disposed between two adjacent columns of pixel regions, the power line 111 is farther from the TFT coupled to the data line DL than the data line DL.

[0132] Exemplarily, the orthographic projection of the power line 111 on the first substrate 101 is covered by the orthographic projection of the light shielding pattern 210 on the first substrate 101 , thereby preventing the light reflected on the power line 111 from being emitted from the liquid crystal cell 10 .

[0133] In some embodiments, Fig.10As shown, the first electrode 130 is located on the first substrate 101 and in each pixel region P. That is, one first electrode 130 is disposed in one pixel region P. The TFT is closer to the first substrate 101 than the first electrode 130. In the pixel region P, the drain D of the TFT is coupled to the first electrode 130 (i.e., the pixel electrode).

[0134] Among them, Fig.14 As shown, the liquid crystal box 10 further includes a passivation layer PVX disposed on the side of the source S and the drain D of the TFT away from the first substrate 101. Furthermore, when the first electrode 130 is a pixel electrode, the passivation layer PVX is located between the first electrode 130 and the source S and the drain D of the TFT. In this case, the first electrode 130 can be coupled to the drain D of the TFT through a via hole disposed on the passivation layer PVX.

[0135] In some embodiments, Fig.10 and FIG. 11A to FIG. 11D As shown, the liquid crystal cell 10 further includes a first conductive pattern 141 , a second conductive pattern 142 and a third conductive pattern 143 .

[0136] The first conductive pattern 141 and the first electrode 130 are made of the same material and are disposed in the same layer. They can be formed simultaneously in the process, thereby saving steps. For example, the liquid crystal box includes a first pattern layer, such as Fig.11A As shown, the first pattern layer 11 includes a first conductive pattern 141 and a first electrode 130. In addition, since the first conductive pattern 141 is transparent, the light emitted by the light source 20 will not be reflected when irradiated on the first conductive pattern 141. Therefore, the orthographic projection of the light shielding pattern 210 on the first substrate 101 will not cover the orthographic projection of the first conductive pattern 141 on the first substrate 101, which can improve the transparency and aperture ratio of the transparent display device 1.

[0137] Exemplarily, the first conductive pattern 141 is located between two adjacent rows of pixel regions, and is also located between two adjacent first electrodes 130. Moreover, between two adjacent rows of pixel regions, the first conductive pattern 141 is farther away from the TFT coupled to the gate line GL than the gate line GL.

[0138] The first conductive pattern 141 is coupled to the power line 111. Exemplarily, the first conductive pattern 141 and the power line 111 cross each other, and the first conductive pattern 141 and the power line 111 are coupled via a via hole penetrating a pattern layer located therebetween.

[0139] Exemplarily, the first conductive pattern 141 extends in the same direction as the gate line GL. The orthographic projection of the first conductive pattern 141 on the first substrate 101 is in the shape of a strip. Between two adjacent rows of pixel regions, two adjacent first conductive patterns 141 can be coupled to form an integrated structure. In this way, the voltage drop of each first conductive pattern 141 can be reduced, thereby improving the uniformity of the potential of each first conductive pattern 141.

[0140] The second conductive pattern 142 is made of the same material as the data line DL, and the two are arranged in the same layer, and can be formed simultaneously in the process, thereby saving steps. For example, the liquid crystal box includes a second pattern layer, and the second pattern layer is closer to the first substrate than the first pattern layer. Fig. 11B As shown, the second pattern layer 12 includes a second conductive pattern 142 and a data line DL. The second conductive pattern 142 is coupled to the drain electrode D of the TFT. Since the drain electrode D of the TFT is coupled to the first electrode 130 , the second conductive pattern 142 is coupled to the first electrode 130 .

[0141] For example, along the column direction of the pixel regions P (eg Fig.10 The orthographic projection of the second conductive pattern 142 on the first substrate 101 is located between the orthographic projections of two adjacent first electrodes 130 on the first substrate 101, and the second conductive pattern 142 is farther away from the TFT coupled to the gate line GL than the gate line GL. A portion of the second conductive pattern 142 can extend into the TFT to serve as the drain electrode D, and in this case, the second conductive pattern 142 and the drain electrode D are integrated into a structure.

[0142] The third conductive pattern 143 is made of the same material as the gate line GL, and the two are arranged in the same layer, and can be formed simultaneously in the process, thereby saving steps. For example, the liquid crystal box includes a third pattern layer, and the third pattern layer is closer to the first substrate than the second pattern layer. Fig. 11C As shown, the third pattern layer 13 includes a third conductive pattern 143 and a gate line GL. Fig.10 The third conductive pattern 143 is located between two adjacent rows of pixel regions, and the orthographic projection of the third conductive pattern 143 on the first substrate 101 is located between the orthographic projections of two adjacent first electrodes 130 on the first substrate 101. The third conductive pattern 143 is farther away from the TFT to which it is coupled than the gate line GL. The third conductive pattern 143 is coupled to the first conductive pattern 141. Since the first conductive pattern 141 is coupled to the power line 111, the third conductive pattern 143 is coupled to the power line 111.

[0143] The orthographic projection of the third conductive pattern 143 on the first substrate 101 overlaps with the orthographic projection of the second conductive pattern 142 on the first substrate 101. In this case, the third conductive pattern 143 and the second conductive pattern 142 and the film layer (e.g., the gate insulating layer GI and the barrier layer 120) located therebetween can form a storage capacitor to store the voltage on the data line DL.

[0144] In addition, the orthographic projection of the second conductive pattern 142 on the first substrate 101 overlaps with the orthographic projection of the first conductive pattern 141 on the first substrate 101, so that the second conductive pattern 142 and the first conductive pattern 141 and the film layer located therebetween also form a storage capacitor to store the voltage on the data line DL. Furthermore, since the film layer (e.g., the passivation layer PVX) located therebetween is relatively thick, that is, the second conductive pattern 142 is relatively far away from the first conductive pattern 141, the capacitance of the storage capacitor formed by the second conductive pattern 142 and the first conductive pattern 141 is smaller than the capacitance of the storage capacitor formed by the third conductive pattern 143 and the second conductive pattern 142.

[0145] For example, Fig.10 and Fig. 11C As shown, the liquid crystal box 10 further includes a fourth conductive pattern 144, which is disposed in the same layer as the second conductive pattern 142 and is made of the same material. For example, the second pattern layer 12 further includes a fourth conductive pattern 144. Along the column direction of the pixel regions P, the fourth conductive pattern 144 is located between two adjacent rows of pixel regions, and also between two adjacent first electrodes 130. The fourth conductive pattern 144 is farther away from the TFT to which it is coupled than the gate line GL. Along the row direction of the pixel regions P (for example, Fig.10 The fourth conductive pattern 144 is farther away from the data line DL than the second conductive pattern 142. The orthographic projection of the fourth conductive pattern 144 on the first substrate 101 does not overlap with the orthographic projection of the second conductive pattern 142 on the first substrate 101, and overlaps with both the first conductive pattern 141 and the third conductive pattern 143. In this case, the first conductive pattern 141 and the fourth conductive pattern 144 are coupled through a via hole penetrating the pattern layer between the first conductive pattern 141 and the fourth conductive pattern 144 are coupled through a via hole penetrating the pattern layer between the first conductive pattern 141 and the third conductive pattern 143, so that the first conductive pattern 141 and the third conductive pattern 143 are coupled.

[0146] In some embodiments, Fig. 12AAs shown, the orthographic projection of the light shielding pattern 210 on the first substrate 101 covers the orthographic projection of the second conductive pattern 142 on the first substrate 101 and the orthographic projection of the third conductive pattern 143 on the first substrate 101. In this case, the light shielding pattern 210 can shield the reflected light of the second conductive pattern 142 and the third conductive pattern 143, and prevent the reflected light from emitting from the liquid crystal box 10. Since the first conductive pattern 141 is transparent, the light shielding pattern 210 does not need to shield it, so that the transmittance of the transparent display device 1 can be improved.

[0147] Exemplarily, the first conductive pattern 141 and the gate line GL extend in the same direction. Fig.13 and Fig.15 As shown, the first conductive pattern 141 includes an unshielded portion 1410. The unshielded portion 1410 is located between two adjacent first electrodes 130, and the unshielded portion 1410 does not overlap with the orthographic projections of the second conductive pattern 142 and the third conductive pattern 143 on the first substrate 101. The orthographic projection of the unshielded portion 1410 on the second substrate 201 does not overlap with the orthographic projection of the shading pattern 210 on the second substrate 201. In this way, the aperture ratio and transmittance of the transparent display device 1 can be improved.

[0148] For example, when the orthographic projection of the light shielding pattern 210 on the first substrate 101 covers the gate line GL, the data line DL, the TFT, the second conductive pattern 142 and the third conductive pattern 143, the top view of the light shielding pattern 210 is as follows: Fig. 12B As shown. Among them, the widths (e.g., the size in the Y direction) of the portions of the light shielding pattern 210 extending along the X direction (e.g., the extension direction of the gate line) are not completely equal, for example, the width of one portion is relatively large, and the width of another portion is relatively small. For example, the width of the portion of the light shielding pattern 210 covering the second conductive pattern 142 and the third conductive pattern 143 is relatively large, and the width of the portion of the light shielding pattern 210 covering only the gate line GL is relatively small.

[0149] In addition, when the liquid crystal cell 10 includes the fourth conductive pattern 144, the orthographic projection of the light shielding pattern 210 on the first substrate 101 also covers the fourth conductive pattern 144. In this way, the problem that light is reflected at the fourth conductive pattern 144 and then emitted from the liquid crystal cell 10 can be avoided.

[0150] In some embodiments, Fig.13 , Fig.14 and Fig.15 As shown, the second electrode 220 is located on the second substrate 201. The second electrode 220 is close to the first substrate 101 relative to the light shielding pattern 210.

[0151] For example, the power line 111 may be coupled to the second electrode 220 by a conductive glue coated on the second substrate 201. For example, the conductive glue may be a gold ball glue. The thickness of the second electrode 220 is about

[0152] It should be noted that the transparent display device 1 further includes an external circuit bound to the liquid crystal box 10 , the power line 111 is coupled to the external circuit, and the external circuit transmits the common electrical signal to the second electrode 220 through the power line 111 .

[0153] In some embodiments, Fig.13 As shown, the orthographic projection of the second electrode 220 on the second substrate 201 covers the entire AA region. Exemplarily, in terms of process, the material to form the second electrode 220 can be deposited on the second substrate 201 and on the side of the light shielding pattern 210 close to the first substrate 101 to form the second electrode 220, thereby simplifying the production process.

[0154] In other embodiments, Fig.16 As shown, the second electrode 220 includes: a second electrode body 221 and a plurality of openings 222 disposed on the second electrode body 221 .

[0155] It can be understood that, in the thickness direction of the liquid crystal cell 10, the plurality of openings 222 penetrate the second electrode body 221. The material of the second electrode body 221 is a transparent conductive material, such as ITO.

[0156] like Fig.17 and Fig.18 As shown, the plurality of openings 222 include at least one of a first opening 2221, a second opening 2222, and a third opening 2223. The orthographic projection of the first opening 2221 on the first substrate 101 overlaps or substantially overlaps with the orthographic projection of the TFT on the first substrate 101. The orthographic projection of the second opening 2222 on the first substrate 101 overlaps with the orthographic projection of the data line DL on the first substrate 101. The orthographic projection of the third opening 2223 on the first substrate 101 overlaps with the orthographic projection of the gate line GL on the first substrate 101.

[0157] Exemplarily, when the plurality of signal lines 110 include a power line 111 , an orthographic projection of the second opening 2222 on the first substrate 101 overlaps with an orthographic projection of the power line 111 on the first substrate 101 .

[0158] It should be noted that the specific arrangement and opening size of the first opening 2221, the second opening 2222 and the third opening 2223 can be designed according to actual conditions, and the embodiments of the present disclosure are not limited thereto. For example, when a plurality of pixel areas P are arranged in an array, the orthographic projection of the second opening 2222 on the first substrate 101 is located between two adjacent pixel areas in a column of pixel areas. In the extension direction of the data line DL, the orthographic projection of the first opening 2221 on the first substrate 101 and the orthographic projection of the second opening 2222 on the first substrate 101 can be arranged alternately and at intervals. Exemplarily, in the extension direction of the data line DL, the length of the second opening 2222 is approximately equal to half the length of the portion of the data line DL located between two adjacent gate lines GL. In the extension direction of the gate line GL, the orthographic projection of the first opening 2221 on the first substrate 101 and the orthographic projection of the third opening 2223 on the first substrate 101 can be arranged alternately and at intervals.

[0159] In which, when the signal lines 110 whose orthographic projection on the first substrate 101 is covered by the orthographic projection of the shading pattern 210 on the first substrate 101 also include the power line 111, the orthographic projection of the second opening 2222 on the first substrate 101 overlaps with the orthographic projection of the power line 111 on the first substrate 101.

[0160] In this case, due to the openings included in the second electrode 220, the size of the area where the orthographic projection of the second electrode 220 on the first substrate 101 overlaps with the orthographic projection of the conductive structure in the liquid crystal box 10 (for example, each signal line 110) on the first substrate 101 can be reduced, thereby avoiding the generation of parasitic capacitance due to the overlap between the orthographic projection of the second electrode 220 on the first substrate 101 and the orthographic projection of the conductive structure in the liquid crystal box 10 (for example, at least one of the TFT, the data line DL and the gate line GL) on the first substrate 101, thereby reducing the load of the transparent display device 1.

[0161] In some embodiments, reference Fig.19 and Fig.21 , an orthographic projection of at least one opening 222 among the plurality of openings 222 on the second substrate 201 does not overlap with an orthographic projection of the light shielding pattern 210 on the second substrate 201 .

[0162] It can be understood that, when the orthographic projection of the first opening 2221 on the second substrate 201 does not overlap with the orthographic projection of the shading pattern 210 on the second substrate 201, light passing through the area where the first opening 2221 is located will not be blocked by the shading pattern 210, thereby improving the transmittance of the transparent display device 1. When the orthographic projection of the second opening 2222 on the second substrate 201 does not overlap with the orthographic projection of the shading pattern 210 on the second substrate 201, light passing through the area where the second opening 2222 is located will not be blocked by the shading pattern 210, thereby improving the transmittance of the transparent display device 1. When the orthographic projection of the third opening 2223 on the second substrate 201 does not overlap with the orthographic projection of the shading pattern 210 on the second substrate 201, light passing through the area where the third opening 2223 is located will not be blocked by the shading pattern 210 (such as Fig. 20 As shown), the transmittance of the transparent display device 1 is improved.

[0163] Furthermore, at least one opening 222 can prevent an electric field from being formed at a position where the orthographic projection of the second electrode 220 on the first substrate 101 overlaps with the orthographic projection of a conductive structure in the liquid crystal box 10 (for example, at least one of the TFT, the data line DL and the gate line GL) on the first substrate 101, thereby causing an abnormality in the process of driving the liquid crystal layer 110 and causing the liquid crystal box 10 to emit light abnormally.

[0164] In some embodiments, Fig. 12A , Fig.13 and Fig.15 As shown, the liquid crystal cell 10 further includes a plurality of post spacers (PS) disposed on the second substrate 201 . The plurality of post spacers PS are farther away from the second substrate 201 than the light shielding pattern 210 .

[0165] Exemplarily, along the thickness direction of the liquid crystal cell 10 , the height of the spacer PS is about 3.6 μm.

[0166] The orthographic projection of one spacer PS on the first substrate 101 overlaps with the orthographic projection of the first conductive pattern 141 on the first substrate 101 .

[0167] It can be understood that the spacer PS can support the liquid crystal box 10 , and can improve the supporting performance of the transparent display device 1 during the process of the transparent display device 1 being squeezed.

[0168] It should be noted that the size of the spacer PS is relatively small, and the effect on the transmittance of the transparent display device 1 is relatively small and can be ignored.

[0169] In some embodiments, Fig. 22As shown, the light source 20 includes a first color light emitting device 21 , a second color light emitting device 22 and a third color light emitting device 23 .

[0170] For example, Fig. 22 As shown, the light source 20 includes a circuit board 24 , and the first color light emitting device 21 , the second color light emitting device 22 and the third color light emitting device 23 are all arranged on the circuit board 24 .

[0171] The light source 20 is configured such that in response to the pulse control signal, the first color light emitting device 21 , the second color light emitting device 22 and the third color light emitting device 23 sequentially and periodically emit lights of corresponding colors.

[0172] The first color, the second color and the third color are three primary colors, for example, the first color is red, the second color is green, and the third color is blue.

[0173] For example, each light emitting device may be an LED (Light Emitting Diode), Micro-LED, Mini-LED or OLED (Organic Light Emitting Diode), etc.

[0174] Exemplarily, the light source 20 further includes a light emitting control circuit, which is coupled to each light emitting device in the light source 20. The light emitting control circuit is configured to output a pulse control signal to control the duty cycle of each light emitting device in the light source 20. The light emitting control circuit may be disposed on the circuit board 24. Alternatively, the transparent display device 1 includes a timing controller (Timing Controller, Tcon), the light source 20 may be coupled to the timing controller, and the timing controller is configured to output a pulse control signal to control the duty cycle of each light emitting device in the light source 20.

[0175] In this case, the light source 20 can periodically emit the first color light, the second color light and the third color light, so that the light incident on the liquid crystal box 10 by the light source 20 is colored light. Therefore, during the display process, the liquid crystal box 10 can emit colored light to achieve color display. In this way, there is no need to set a color filter on the light output side of the liquid crystal box 10, thereby saving costs.

[0176] It can be understood that, in the case where the liquid crystal layer 300 includes liquid crystal molecules and polymer molecules, when the first color light emitting device 21 emits the first color light, the pixel area P to be displayed in the transparent display device 1 can be in a scattering state under electrical drive, and the other pixel areas P are in a transparent state; when the second color light emitting device 22 emits the second color light, the pixel area P to be displayed in the transparent display device 1 can be in a scattering state under electrical drive, and the other pixel areas P are in a transparent state; when the third color light emitting device 23 emits the third color light, the pixel area P to be displayed in the transparent display device 1 can be in a scattering state under electrical drive, and the other pixel areas P are in a transparent state.

[0177] It should be noted that technicians in the field can adjust the duty cycle of the pulse control signal according to actual display conditions to control the light-emitting periods of the first color light emitting device 21, the second color light emitting device 22 and the third color light emitting device 23.

[0178] In some embodiments, Fig.14 As shown, the liquid crystal box 10 further includes a protective layer (Over Coat, OC) disposed on the second substrate 201 and located on the side of the light shielding pattern 210 close to the first substrate 101. The surface of the protective layer OC on the side away from the second substrate 201 is flat. In this case, when the second electrode 220 is located on the second substrate 201, the second electrode 220 is located on the side of the protective layer OC away from the second substrate 201, so that the film layer of the second electrode 220 can be flat, thereby improving the uniformity of the second electrode 220.

[0179] like Fig.14 As shown, the liquid crystal box 10 further includes a first alignment layer 150 and a second alignment layer 230. The first alignment layer 150 is located on a side of the first substrate 101 close to the liquid crystal layer 300, and the second alignment layer 230 is located on a side of the second substrate 201 close to the liquid crystal layer 300. Exemplarily, when the second electrode 220 is located on the first substrate 101, the first alignment layer 150 is closer to the liquid crystal layer 300 than the first electrode 130 and the second electrode 220; when the second electrode 220 is located on the second substrate 201, the second alignment layer 230 is closer to the liquid crystal layer 300 than the second electrode 220.

[0180] By way of example, the first alignment layer 150 and the second alignment layer 230 are made of the same material, for example, PI. The alignment direction of the first alignment layer 150 and the alignment direction of the second alignment layer 230 are antiparallel to each other. By way of example, the first alignment layer 150 and the second alignment layer 230 may be aligned by friction alignment or photoalignment in the process. For example, the alignment direction of the first alignment layer 150 is parallel to and opposite to the alignment direction of the second alignment layer 230.

[0181] In addition, the transparent display device 1 described above can be any device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the embodiments described can be implemented in or associated with a variety of electronic devices, such as (but not limited to) watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, car displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rear-view cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0182] Exemplarily, the transparent display device 1 can be applied to vehicle-mounted displays, window displays, shopping mall advertising, museum displays, refrigerator doors, architectural media, and the like.

[0183] For example, the transparent display device 1 can be used for car windows. For example, part or all of the front windshield can be replaced with a transparent display device, or it can be attached to the front windshield to cover part or all of the front windshield. Replacing part of the front windshield with a transparent display device means that an opening can be set on the front windshield, and then the transparent display device 1 can be embedded in the opening. In this way, the transparent display device 1 not only plays the role of the front windshield, but also can display images. When the transparent display device 1 is applied to the front window of a car, the information of the car's dashboard, the navigation information of the map, etc. can be displayed on the front window of the car, so that the driver can see the road ahead while viewing the dashboard and the map, providing a better driving experience for the driver.

[0184] For example, the transparent display device 1 can be applied to a window display cabinet (also referred to as a display cabinet), which includes a box body and a transparent display device 1 arranged on one side of the box body, and the box body has a certain storage space, which can be used to place items to be displayed. The surface of one side of the window display cabinet on which the transparent display device 1 is arranged can be called a display surface. Taking a laptop as an example of the item to be displayed, the display surface of the window display cabinet can display information such as parameters, prices, and application scenarios of the item to be displayed, so that viewers can have a deeper understanding of the product. At the same time, at least part of the inner surface of the box body can also be set to white, so that part of the light scattered to the storage space of the box body can be reflected by the inner surface of the box body onto the item to be displayed, which can provide better ambient light for the item to be displayed; another part can be emitted from the display surface through the transparent display device 1, thereby improving the brightness of the transparent display device 1 placed in the transparent display device 1.

[0185] For example, an opening or a groove may be provided on the refrigerator door, and the transparent display device 1 may be provided in the opening or the groove. In addition, at least one of a touch structure and an audio player, etc. may be integrated into the transparent display device 1, so that the user can observe the situation inside the refrigerator even if the refrigerator door is not opened, and a human-computer interaction interface may be displayed on the transparent display device 1, and the user may operate on the transparent display device through the human-computer interaction interface, and the transparent display device 1 senses the user's operation through the touch structure. For example, the temperature set by the user and the temperature adjustment image are displayed on the transparent display device 1, and the user may adjust the set temperature by pressing the temperature adjustment image. In addition, the control interface of the audio player may be displayed on the transparent display device 1, and the audio player may be turned on to play audio by operating on the control interface, thereby expanding the scope of application of the transparent display device 1.

[0186] The embodiment of the present disclosure provides a method for preparing a transparent display device, which can be used to form the transparent display device 1 in any of the above embodiments. Fig.23 As shown, the preparation method comprises the following steps:

[0187] S10, Reference Figures 13 to 15 , a plurality of signal lines 110 are formed on the first substrate 101 and in the AA region.

[0188] S20, Reference Figures 13 to 15 , a light shielding pattern 210 is formed on the second substrate 201 .

[0189] S30 , forming a first electrode 130 on the first substrate 101 , and forming a second electrode 220 on the first substrate 101 or on the second substrate 201 .

[0190] S40 , forming a liquid crystal layer 300 between the first substrate 101 and the second substrate 201 to obtain a liquid crystal cell 10 .

[0191] S50, Reference Figures 13 to 15 , a light source 20 is disposed opposite to the side surface of the liquid crystal box 10 to obtain a transparent display device 1.

[0192] Among them, reference Figure 2 and Figure 3, at least one of the plurality of signal lines 110 has a bottom surface 110A close to the first substrate 101 and a reflective side surface 110B connected to the bottom surface 110A and facing the light source 20. The slope angle γ formed by the reflective side surface 110B and the bottom surface 110A is an acute angle. The shading pattern 210 is located on the reflection path after the light emitted by the light source 20 is irradiated to the reflective side surface 110B. The liquid crystal layer 300 includes liquid crystal molecules 301 and polymer molecules 302. The liquid crystal layer 300 is configured to cause total reflection or scattering of light incident to the liquid crystal layer 300 under the control of the electric field provided by the first electrode 130 and the second electrode 220.

[0193] Illustratively, a material to form the light shielding pattern 210 may be deposited on the second substrate 201 to form a light shielding film, and the light shielding film may be patterned to form the light shielding pattern 210 .

[0194] It should be noted that the order of forming each structure on the first substrate and forming each structure on the second substrate is not limited. For example, each structure can be formed on the second substrate first and then on the first substrate. In addition, the order of forming multiple signal lines, the first electrode and the second electrode on the first substrate can be adjusted according to actual conditions and is not limited here. For example, multiple signal lines and the first electrode can be formed on the first substrate first and then the second electrode is formed, or multiple signal lines and the second electrode can be formed first and then the first electrode is formed.

[0195] For example, reference Fig.15 , forming the second electrode 220 on the second substrate 201 includes: Fig.24 As shown, on the second substrate 201 and on the side where the light shielding pattern 210 is away from the second substrate 201, a material to form a protective layer OC is deposited to form a protective layer OC. A transparent conductive material is deposited on the side where the protective layer OC is away from the second substrate 201 to form a second electrode 220. A spacer PS is formed on the side where the second electrode 220 is away from the second substrate 201. A material to form a second alignment layer 230 is coated on the side where the spacer PS is away from the second substrate 201 to form a second alignment film, and the second alignment film is subjected to friction alignment or photo alignment to obtain a second alignment layer 230.

[0196] It should be noted that the preparation method of the transparent display device has the same beneficial effects as the transparent display device 1 described in some of the above embodiments, and will not be described in detail here.

[0197] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A transparent display device, characterized in that: It comprises a liquid crystal box and a light source, wherein the liquid crystal box has a display area, and the display area comprises a plurality of pixel areas; the light source is arranged opposite to a side surface of the liquid crystal box; The liquid crystal box comprises: a first substrate; A first electrode is disposed on the first substrate and is located in each pixel area; A thin film transistor disposed on the first substrate and located in each pixel area; the thin film transistor is closer to the first substrate than the first electrode; the thin film transistor includes a gate, an active layer, a source electrode and a drain electrode; a second substrate, arranged opposite to the first substrate; A second electrode is disposed on the first substrate or the second substrate; a liquid crystal layer, sandwiched between the first substrate and the second substrate; the liquid crystal layer comprises polymer molecules and liquid crystal molecules; the liquid crystal layer is configured to cause total reflection or scattering of light incident to the liquid crystal layer under the control of the electric field provided by the first electrode and the second electrode; A plurality of signal lines are arranged on the first substrate and located in the display area, including gate lines, data lines and power lines; the extension direction of the gate lines intersects with the extension direction of the data lines, the power lines and the data lines have the same extension direction and are arranged at intervals, and the power lines and the data lines are made of the same material; at least one of the signal lines has a bottom surface close to the first substrate and a reflective side surface connected to the bottom surface and facing the light source, and the slope angle formed by the reflective side surface and the bottom surface is an acute angle; A light shielding pattern is provided on the second substrate; the light shielding pattern is located on a reflection path after the light emitted by the light source is irradiated onto the reflective side surface; A first conductive pattern is provided in the same layer as the first electrode, coupled to the power line and the third conductive pattern, and the first conductive pattern and the gate line extend in the same direction; A second conductive pattern is disposed in the same layer as the data line and coupled to the drain of the thin film transistor; A third conductive pattern is disposed in the same layer as the gate line, and an orthographic projection of the third conductive pattern on the first substrate overlaps with an orthographic projection of the second conductive pattern on the first substrate; Among them, the gate of the thin film transistor is coupled to the gate line, the source of the thin film transistor is coupled to the data line, and the drain of the thin film transistor is coupled to the first electrode; the first conductive pattern includes an unobstructed portion located between two adjacent first electrodes, and the unobstructed portion has no overlap with the second conductive pattern and the orthographic projection of the first conductive pattern on the first substrate; the orthographic projection of the unobstructed portion on the second substrate has no overlap with the orthographic projection of the shading pattern on the second substrate.

2. The transparent display device according to claim 1, characterized in that: An orthographic projection of at least one signal line among the plurality of signal lines on the first substrate is covered by an orthographic projection of the light shielding pattern on the first substrate.

3. The transparent display device according to claim 1, characterized in that: The orthographic projection of the at least one signal line on the first substrate has a first edge and a second edge, and the orthographic projection of the corresponding portion of the shading pattern on the first substrate has a third edge and a fourth edge; the corresponding portion of the shading pattern is a portion of the shading pattern whose orthographic projection on the first substrate covers the at least one signal line; In the width direction of the at least one signal line, the first edge and the second edge are located opposite to each other; the third edge is located on a side of the first edge away from the second edge, and the fourth edge is located on a side of the second edge away from the first edge; The sum of a distance between the third edge and the first edge and a distance between the fourth edge and the second edge is greater than or equal to 6 μm.

4. The transparent display device according to claim 3, characterized in that: The distance between the third edge and the first edge is equal to the distance between the fourth edge and the second edge.

5. The transparent display device according to claim 3, characterized in that: The ratio of the width of the bottom surface of the corresponding portion of the light shielding pattern close to the second substrate to the width of the bottom surface of the at least one signal line is 1 to 2.

5.

6. The transparent display device according to claim 3, characterized in that: The relationship between the width d of the bottom surface of the at least one signal line and the width D of the bottom surface of the corresponding part of the light shielding pattern close to the second substrate side is D=2Ltan(2γ+α-90°)+d; Among them, L is the distance between the bottom surface of the at least one signal line and the bottom surface of the corresponding part of the shading pattern close to the second substrate side; γ is the slope angle formed by the reflective side surface and the bottom surface of the at least one signal line; α is the angle between the light incident on the reflective side surface of the at least one signal line and the bottom surface of the signal line.

7. The transparent display device according to claim 6, characterized in that: 0°≤α≤60°; 45°≤γ≤80°.

8. The transparent display device according to claim 1, characterized in that: The material of the plurality of signal lines includes metal.

9. The transparent display device according to claim 1, characterized in that: The orthographic projection of the light-shielding pattern on the first substrate also covers the thin film transistor.

10. The transparent display device according to claim 1, characterized in that: The orthographic projection of the light-shielding pattern on the first substrate covers the orthographic projection of the second conductive pattern on the first substrate and the orthographic projection of the third conductive pattern on the first substrate.

11. The transparent display device according to any one of claims 1, 9 and 10, characterized in that: The second electrode is located on the second substrate, and the second electrode is close to the first substrate relative to the light shielding pattern.

12. The transparent display device according to claim 11, characterized in that: The second electrode comprises: a second electrode body; A plurality of openings are provided on the second electrode body; the plurality of openings include: at least one of a first opening, a second opening and a third opening; In the case where the liquid crystal cell includes a thin film transistor, an orthographic projection of the first opening on the first substrate coincides or substantially coincides with an orthographic projection of the thin film transistor on the first substrate; In the case where the plurality of signal lines include gate lines and data lines, an orthographic projection of the second opening on the first substrate overlaps with an orthographic projection of the data line on the first substrate; An orthographic projection of the third opening on the first substrate overlaps with an orthographic projection of the gate line on the first substrate.

13. The transparent display device according to claim 12, characterized in that: An orthographic projection of at least one of the plurality of openings on the second substrate does not overlap with an orthographic projection of the light shielding pattern on the second substrate.

14. The transparent display device according to any one of claims 1, 9 and 10, characterized in that: The liquid crystal box also includes: A plurality of spacers are disposed on the second substrate; the plurality of spacers are farther away from the second substrate than the light shielding pattern; In the case where the liquid crystal cell includes a first conductive pattern, an orthographic projection of a spacer on the first substrate overlaps with an orthographic projection of the first conductive pattern on the first substrate; The orthographic projections of the plurality of spacers on the second substrate do not overlap with the orthographic projections of the light shielding pattern on the second substrate.

15. The transparent display device according to claim 1, characterized in that: The light source includes a first color light emitting device, a second color light emitting device and a third color light emitting device; The light source is configured such that, in response to a pulse control signal, the first color light emitting device, the second color light emitting device and the third color light emitting device sequentially and periodically emit lights of corresponding colors.

Images