Display module and display device

Abstract

The application relates to the display field and discloses a display module and a display device. The display module comprises a transparent display panel, a light source assembly and a transparent adhesive layer connecting the transparent display panel and the light source assembly. The light source assembly comprises a lamp strip and a light guide structure layer, the light guide structure layer is located on one side in the thickness direction of the transparent display panel, and the lamp strip is arranged on one circumferential surface of the light guide structure layer; the light guide structure layer is used for guiding the light beams emitted by the lamp strip into the transparent display panel. A plurality of through holes are arranged on the transparent adhesive layer, each through hole penetrates the transparent adhesive layer along the thickness direction of the transparent adhesive layer. The design of the through holes introduces an air layer between the light guide structure layer and the transparent display panel. Part of the light rays emitted by the light guide structure layer towards the transparent display panel continue to propagate in the light guide structure layer after total reflection at the interface between the light guide structure layer and the air layer, so that the uniformity of the light rays emitted by the light guide structure layer towards the transparent display panel is improved, and the brightness and picture uniformity of the transparent display panel are significantly improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] In existing transparent display devices, the light source is located on one side of the display panel. As the light emitted by the light source enters the display panel through the periphery, there are inevitably problems of light leakage and absorption. As a result, the brightness of the side of the display panel closer to the light source is high, while the brightness of the side farther away from the light source is low, resulting in poor image uniformity. Utility Model Content

[0003] This application discloses a display module and display device for making the light emitted by the light source as uniformly as possible emitted towards the transparent display panel, thereby improving the brightness and screen uniformity of the transparent display panel.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, embodiments of this application provide a display module, comprising:

[0006] Transparent display panel;

[0007] A light source assembly includes a light strip and a light guide structure layer. The light guide structure layer is located on one side of the transparent display panel in the thickness direction, and the light strip is disposed on one peripheral side of the light guide structure layer. The light guide structure layer is used to guide the light beam emitted from the light strip into the transparent display panel.

[0008] A transparent adhesive layer connects the transparent display panel and the light source assembly; the transparent adhesive layer is provided with a plurality of through holes, each of the through holes penetrating the transparent adhesive layer along the thickness direction of the transparent adhesive layer.

[0009] The aforementioned display module includes a light source assembly and a transparent display panel. Transparency can be understood as allowing light to pass through without significant scattering or absorption. Taking the transparent display panel as an example, in this embodiment, the transparent display panel includes a first side and a second side arranged along its thickness direction. This transparent display panel allows light to enter from the first side and exit from the second side. The light source assembly provides a light source for the transparent display panel. Specifically, the light source assembly includes a light strip and a light guide structure layer. The light guide structure layer and the transparent display panel are arranged along the thickness direction of the display panel. The light strip is disposed on one peripheral side of the light guide structure layer. The light-emitting side of the light strip faces the peripheral side of the light guide structure layer. The light emitted from the light strip is guided into the transparent display panel via the light guide structure layer. In a specific implementation, the light guide structure layer and the transparent display panel are connected by a transparent adhesive layer. The transparent adhesive layer has multiple through-holes, each penetrating the transparent adhesive layer along its thickness direction. The through-holes in the transparent adhesive layer are filled with air. The design of the through-holes in the transparent adhesive layer introduces an air layer between the light guide structure layer and the transparent display panel. When light propagates from the light guide structure layer to the transparent display panel, if the interface between the light guide structure layer and the transparent display panel is an air layer, since the refractive index of air is less than that of the light guide structure layer, part of the light emitted from the light guide structure towards the transparent display panel undergoes total internal reflection at the interface between the light guide structure layer and the air layer, and the totally internalized light continues to propagate within the light guide structure layer; if the interface between the light guide structure layer and the transparent display panel is a transparent adhesive layer, part of the light emitted from the light guide structure towards the transparent display panel exits through the transparent adhesive layer to the transparent display panel.

[0010] Therefore, in the display module provided in this application embodiment, the light emitted from the lamp strip can continuously propagate in the light guide structure layer, increasing the light intensity on the side of the light guide structure layer away from the lamp strip, thereby improving the uniformity of the light emitted from the light guide structure layer toward the transparent display panel, and significantly improving the brightness and screen uniformity of the transparent display panel.

[0011] In some embodiments, the transparent adhesive layer is provided with multiple rows of through holes, each row of through holes including multiple through holes arranged along a first direction, the first direction being the extension direction of the light strip; any two rows of through holes are arranged along a second direction, the second direction being perpendicular to the first direction.

[0012] In some embodiments, the transparent display panel includes a plurality of pixel units; the plurality of pixel units are arranged in an array along the first direction and the second direction;

[0013] The size of the through hole in the second direction is P, and the size of the pixel unit in the second direction is d. P satisfies: P = b * d, 2 ≤ b ≤ 3.

[0014] In some embodiments, each of the through holes has the same size in a first direction.

[0015] In some embodiments, the transparent display panel includes a plurality of pixel units; the plurality of pixel units are arranged in an array along the first direction and the second direction; the size of the pixel unit in the second direction is d;

[0016] The peripheral side includes a first side of the transparent adhesive layer near the light strip;

[0017] The row of through holes closest to the first side is the first row of through holes, and the distance between the first row of through holes and the first side is W1. Along the direction away from the light strip, the distance between the nth row of through holes and the (n-1)th row of through holes is W. n n is a positive integer greater than 1;

[0018] W1 satisfies: W1=m*d,2≤m≤3;

[0019] W n Satisfy: W n =W1+(n-1)*ΔW, ΔW=k*d, 2≤k≤3.

[0020] In some embodiments, the distance between any two adjacent through holes in each row is equal.

[0021] In some embodiments, the thickness of the transparent adhesive layer is 0.03-0.1 mm.

[0022] In some embodiments, the light guide structure layer includes:

[0023] The first transparent cover plate is bonded to the transparent display panel through the transparent adhesive layer;

[0024] A light guide strip is disposed between the light-emitting side of the light strip and the first transparent cover plate, for guiding the light beam emitted from the light strip into the first transparent cover plate.

[0025] In some embodiments, the difference λ between the refractive index of the transparent adhesive layer and the refractive index of the first transparent cover plate satisfies: -0.05 ≤ λ ≤ 0.05;

[0026] And / or, the thickness of the light guide strip is greater than or equal to the thickness of the lamp strip;

[0027] And / or, the thickness of the first transparent cover is greater than or equal to the thickness of the light strip.

[0028] In some embodiments, the light strip includes a circuit board and light-emitting units disposed on the circuit board;

[0029] The light guide strip is fixed to the circuit board and located on the light-emitting side of the light-emitting unit;

[0030] The circuit board is fixed to the edge of the first transparent cover plate away from the transparent display panel;

[0031] A first reflective film is provided on the side of the light guide strip away from the circuit board.

[0032] In some embodiments, the peripheral side of the first transparent cover includes a first side and a plurality of second sides, the first side is provided with the light guide strip, and the second side is provided with a second reflective film;

[0033] And / or, a third reflective film is provided on the peripheral side of the transparent display panel.

[0034] In some embodiments, there are two light strips, which are located on opposite sides of the light guide structure layer.

[0035] And / or, the display module further includes a second transparent cover plate, which is located on the side of the transparent display panel opposite to the light guide structure layer.

[0036] In some embodiments, the light source assembly is connected to both opposite sides of the transparent display panel along the thickness direction.

[0037] In some embodiments, the transparent display panel includes:

[0038] First substrate;

[0039] The second substrate is disposed opposite to the first substrate;

[0040] A liquid crystal layer is located between the first substrate and the second substrate;

[0041] The first substrate includes at least one thin-film transistor; a reflective layer is disposed on the side of the thin-film transistor facing the liquid crystal layer.

[0042] Secondly, embodiments of this application also provide a display device, which includes a housing and a display module as described in any one of the embodiments of the first aspect, the display module being located inside the housing. Attached Figure Description

[0043] Figure 1 This illustrates one structure of a display device;

[0044] Figure 2A The first structure of the display module is shown;

[0045] Figure 2B The first model of the display module is shown;

[0046] Figure 2C It shows Figure 2BA schematic diagram of optical power and distance along the x-axis;

[0047] Figure 2D It shows Figure 2B A schematic diagram of optical power and distance along the y-axis;

[0048] Figure 3 A second structure for the display module is shown;

[0049] Figure 4 It shows Figure 3 A schematic diagram of the optical path in the display module;

[0050] Figure 5 This illustrates a third structure for the display module;

[0051] Figure 6 The first structure of the transparent adhesive layer is shown;

[0052] Figure 7 This illustrates a structure for pixel unit design on a transparent display panel;

[0053] Figure 8A A second model of the display module is shown;

[0054] Figure 8B It shows Figure 8A A schematic diagram of optical power and distance along the x-axis;

[0055] Figure 8C It shows Figure 8A A schematic diagram of optical power and distance along the y-axis;

[0056] Figure 9 This illustrates a fourth structure for the display module;

[0057] Figure 10 The fifth structure of the display module is shown;

[0058] Figure 11A The third model of the display module is shown;

[0059] Figure 11B It shows Figure 11A A schematic diagram of optical power and distance along the x-axis;

[0060] Figure 11C It shows Figure 11A A schematic diagram of optical power and distance along the y-axis;

[0061] Figure 12 The sixth structure of the display module is shown;

[0062] Figure 13 It shows Figure 12 A structure of a transparent adhesive layer;

[0063] Figure 14A It shows Figure 12 A schematic diagram showing the optical power and distance along the x-axis of the display module;

[0064] Figure 14B It shows Figure 12 The diagram shows the optical power and distance along the y-axis of the display module;

[0065] Figure 15 The seventh structure of the display module is shown;

[0066] Figure 16 The eighth structure of the display module is shown;

[0067] Figure 17 The ninth structure of the display module is shown;

[0068] Icons: 100-Housing; 200-Display module; 1'-Transparent display panel; 2'-Light source; 1-Transparent display panel; 2-Light source assembly; 3-Transparent adhesive layer; 4-Second transparent cover plate; 5-First reflective film; 6-Second reflective film; 7-Third reflective film; 8-Fourth reflective film; 11-First substrate; 12-Second substrate; 13-Liquid crystal layer; 21-Light strip; 22-Light guide structure layer; 31-Through hole; 41-First optical adhesive layer; 3'-Second optical adhesive layer; 1a-Pixel unit; 211-Circuit board; 212-Light emission unit; 221-First transparent cover plate; 222-Light guide strip; 111-Pixel electrode; 112-Thin film transistor; 113-Reflective layer. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone.

[0070] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0071] Transparent display technology is an innovative technology that combines display functionality with transparency, enabling the device to maintain its transparency while displaying information. Transparency refers to the property of a material to allow light to pass through without significant scattering or absorption. This means that users can see the displayed content while also observing the scene behind the device. Transparent display technology has been widely applied in various fields in recent years, particularly in augmented reality (AR), smart homes, automobiles, and healthcare.

[0072] A transparent display device is a technological device that can display information while maintaining visual transparency. It combines transparent materials and display technology, allowing users to see objects or scenes behind the device while viewing the displayed content.

[0073] Figure 1 A structure of a display device is shown. The display device includes a housing 100 and a display module 200, which is located inside the housing 100. The display module is used to display text or images.

[0074] The display device can be a mobile phone or any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, medical equipment, industrial control equipment, touch interactive terminal, etc. This application embodiment does not make any special limitation in this regard.

[0075] Figure 2A The first structure of the display module is shown. Figure 2B The first model of the display module is shown; Figure 2C It shows Figure 2B A schematic diagram of optical power and distance along the x-axis; Figure 2D It shows Figure 2B A schematic diagram of optical power and distance along the y-axis.

[0076] like Figure 2AAs shown, the display module 200 includes a transparent display panel 1' and a light source 2'. The light source 2' is disposed on one peripheral side of the transparent display panel 1'. The light-emitting side of the light source 2' faces the transparent display panel 1'. The light emitted from the light source 2' directly enters the transparent display panel 1'. In a specific implementation, the light source 2' is a light strip. Taking the transparent display panel 1' as a liquid crystal display panel as an example, after the transparent display panel 1' is powered on, due to the lack of a light guiding structure, most of the light is scattered by the liquid crystal near the position of the light source 2', and cannot propagate in the transparent display panel 1' to the side where the light source 2' is disposed, resulting in low overall brightness and uneven distribution of the display device. The brightness decreases as the distance from the light source 2' increases. To verify the brightness uniformity of the display module 200, such as... Figures 2B-2D As shown, Figure 2B A coordinate system is established with the center of the transparent display panel 1' as the origin, the parallel extension direction of the light strip as the x-axis, and the perpendicular extension direction of the light strip as the y-axis. For example... Figure 2C As shown, the distance between each point on the x-axis of the transparent display panel 1' and the light strip is equal, and the light power at each point on the x-axis does not vary much, showing relatively uniformity. Since brightness is directly proportional to light power, the brightness at each point on the x-axis of the transparent display panel 1' is relatively uniform. Figure 2D As shown, points on the y-axis of the transparent display panel 1' gradually move away from the light strip, along the direction away from the light strip, as... Figure 2B Along the y-axis, the optical power at each point on the y-axis gradually decreases, with the ratio of the minimum to the maximum optical power being 15.9%. Therefore, in this display module 200, the brightness of the transparent display panel 1' decreases as the distance from the light source 2' increases, and the brightness uniformity is 15.9%.

[0077] Figure 3 The second structure of the display module is shown. Figure 4 It shows Figure 3 This is a schematic diagram of the optical path in the display module.

[0078] like Figure 3 As shown in some embodiments of this application, the display module 200 includes a transparent display panel 1, a light source assembly 2, and a transparent adhesive layer 3 connecting the transparent display panel 1 and the light source assembly 2. The light source assembly 2 includes a light strip 21 and a light guide structure layer 22. The light guide structure layer 22 is located on one side of the transparent display panel 1 along its thickness direction, and the light strip 21 is disposed on one peripheral side of the light guide structure layer 22. The light guide structure layer 22 is used to guide the light beam emitted from the light strip 21 into the transparent display panel 1. The transparent adhesive layer 3 has multiple through holes 31, each through hole 31 penetrating the transparent adhesive layer 3 along its thickness direction.

[0079] The aforementioned display module 200 includes a light source assembly 2 and a transparent display panel 1. Transparency can be understood as allowing light to pass through without significant scattering or absorption. Taking the transparent display panel 1 as an example, in this embodiment, the transparent display panel 1 includes a first side and a second side arranged along its thickness direction. The transparent display panel 1 allows light to enter from the first side and exit from the second side. The light source assembly 2 provides a light source for the transparent display panel 1. Specifically, the light source assembly 2 includes a light strip 21 and a light guide structure layer 22. The light guide structure layer 22 and the transparent display panel 1 are arranged along the thickness direction of the display panel. The light strip 21 is disposed on one peripheral side of the light guide structure layer 22. The light-emitting side of the light strip 21 faces the peripheral side of the light guide structure layer 22. The light emitted from the light strip 21 is guided into the transparent display panel 1 via the light guide structure layer 22. In a specific implementation, the light guide structure layer 22 and the transparent display panel 1 are connected by a transparent adhesive layer 3. The aforementioned transparent adhesive layer 3 has multiple through holes 31, each of which penetrates the transparent adhesive layer 3 along its thickness direction. The through holes 31 in the transparent adhesive layer 3 are filled with air. This design of the through holes 31 in the transparent adhesive layer 3 allows for the introduction of an air layer between the light guide structure layer 22 and the transparent display panel 1. Figure 4 As shown, when light propagates from the light guide structure layer 22 to the transparent display panel 1, if the interface between the light guide structure layer 22 and the transparent display panel 1 is an air layer, since the refractive index of air is less than that of the light guide structure layer 22, part of the light emitted from the light guide structure layer 22 toward the transparent display panel 1 undergoes total internal reflection at the interface between the light guide structure layer 22 and the air layer, and the totally internalized light continues to propagate within the light guide structure layer 22; if the interface between the light guide structure layer 22 and the transparent display panel 1 is a transparent adhesive layer 3, part of the light emitted from the light guide structure toward the transparent display panel 1 is emitted to the transparent display panel 1 via the transparent adhesive layer 3.

[0080] Therefore, in the display module 200 provided in this application embodiment, the light emitted from the light strip 21 can continuously propagate in the light guide structure layer 22, thereby increasing the light intensity on the side of the light guide structure layer 22 away from the light strip 21, thus improving the uniformity of the light emitted from the light guide structure layer 22 toward the transparent display panel 1, and significantly improving the brightness and screen uniformity of the transparent display panel 1.

[0081] Figure 5 The third structure of the display module is shown.

[0082] In the aforementioned display module 200, the light guide structure layer 22 can be configured in various ways. For example, as... Figure 3 As shown, the light guide structure layer 22 is a single-layer structure. Alternatively, as... Figure 5 As shown, the light guide structure layer 22 is a spliced ​​structure.

[0083] In the embodiment where the light guide structure layer 22 is a single layer, the light guide structure layer 22 is a transparent light guide plate. The transparent light guide plate includes a dotted surface and a light-emitting surface arranged opposite each other, and a light-incident surface connecting the dotted surface and the light-emitting surface; the lamp strip 21 is located on the light-incident surface side of the transparent light guide plate. In a specific implementation, the light guide structure layer 22 can be a glass light guide plate.

[0084] The light guide structure layer 22 described above is a splicing structure embodiment, such as... Figure 5 As shown, the light guide structure layer 22 includes a first transparent cover plate 221 and a light guide strip 222. The first transparent cover plate 221 is connected to the transparent display panel 1 through a transparent adhesive layer 3; the light guide strip 222 is disposed between the light-emitting side of the lamp strip 21 and the first transparent cover plate 221, and is used to guide the light beam emitted from the lamp strip 21 into the first transparent cover plate 221. In a specific implementation, the first transparent cover plate 221 covers the display area of ​​the transparent display panel 1.

[0085] During the handling of the display module 200, contamination or scratches may occur. In some embodiments of this application, a first transparent cover plate 221 with higher hardness is used for the part of the light guide structure layer 22 that is easily contaminated or scratched. In specific implementations, the first transparent cover plate 221 is a glass cover plate, which has better resistance to oil stains and scratches. The light guide strip 222 between the light strip 21 and the first transparent cover plate 221 can preferably be made of a material with better light uniformity and lower hardness than glass. For example, the light guide strip 222 can be made of optical grade acrylic (PMMA) or polycarbonate (PC) sheet.

[0086] In some embodiments, such as Figure 5 As shown, the thickness of the first transparent cover plate 221 is greater than or equal to the thickness of the light strip 21, which can ensure that one of the peripheral sides of the first transparent cover plate 221 facing the light strip 21 completely covers the light-emitting surface of the light strip 21, thereby improving the light-injection efficiency of the light strip 21.

[0087] like Figure 5 As shown, the light guide strip 222 is tightly integrated with the lamp strip 21, and all the light emitted from the lamp strip 21 is guided into the first transparent cover plate 221 by the light guide strip 222. To ensure that the light-incident surface of the light guide strip 222 completely covers the light-emitting surface of the lamp strip 21, the thickness of the light guide strip 222 is greater than or equal to the thickness of the lamp strip 21.

[0088] In one implementation, the thickness of the light strip 21 is 0.6 mm, the thickness of the light guide strip 222 is 1 mm, and the thickness of the first transparent cover plate 221 is 0.7 mm.

[0089] In some embodiments, such as Figure 5As shown, the light strip 21 includes a circuit board 211 and a light-emitting unit 212 disposed on the circuit board 211; the light guide strip 222 is fixed to the circuit board 211 and located on the light-emitting side of the light-emitting unit 212; the circuit board 211 is fixed to the edge of the first transparent cover plate 221 away from the transparent display panel 1.

[0090] In one implementation, the circuit board 211 of the light strip 21 has multiple light-emitting units 212 arranged at intervals along a first direction. A light guide strip 222 is bonded to the circuit board 211, extends along the first direction, and is tightly fitted to all the light-emitting units 212. To ensure the light mixing distance of the light-emitting elements, the width of the light guide strip 222 is greater than the distance between two adjacent light-emitting units 212. Here, the width of the light guide strip 222 is its dimension in a second direction, which is perpendicular to the first direction. In some embodiments, to further increase the light mixing distance of the light-emitting elements, the end face of the light guide strip 222 facing the light-emitting element has a concave-convex structure. When the light emitted by the light-emitting element is incident on the concave-convex structure, part of the light is directly incident into the light guide strip 222 through the concave-convex structure, and part of the light is reflected on the surface of the concave-convex structure, changes direction, and is reflected again by the reflector and other structures on the light strip 21, changes the incident angle, and then incident into the light guide strip 222, thus achieving the effect of quickly scattering the incident light beam.

[0091] When the light strip 21 is fixed to the first transparent cover plate 221, the circuit board 211 can be adhered to the edge of the first transparent cover plate 221 facing away from the transparent display panel 1. In a specific implementation, the light guide strip 222 is adhered to the circuit board 211 with double-sided adhesive, and the double-sided adhesive is also adhered to the first transparent cover plate 221. In this embodiment, the circuit board 211, the light guide strip 222, and the first transparent cover plate 221 are connected by the same double-sided adhesive, which facilitates fixation.

[0092] In some embodiments of this application, such as Figure 5 As shown, the display module 200 also includes a second transparent cover plate 4, which is located on the side of the transparent display panel 1 away from the light guide structure layer 22.

[0093] In a specific implementation, the second transparent cover plate 4 is bonded to the second substrate 12 in the transparent display panel 1 through the first optical adhesive layer 41. For example, the second transparent cover plate 4 is a glass cover plate.

[0094] like Figure 5 As shown, the first substrate 11 of the transparent display panel 1 is bonded to the first transparent cover plate 221 via a transparent adhesive layer 3. In the specific design of the transparent adhesive layer 3, it is necessary to ensure that the transparent adhesive layer 3 guides as much light as possible into the first transparent cover plate 221. Therefore, a structure with a refractive index close to that of the first transparent cover plate 221 is selected as the transparent adhesive layer 3.

[0095] In some embodiments, the refractive index of the transparent adhesive layer 3 is similar to that of the first transparent cover plate 221. "Similar" can be understood as the difference λ between the refractive index of the transparent adhesive layer 3 and the refractive index of the first transparent cover plate 221 satisfying the condition: -0.05 ≤ λ ≤ 0.05. For example, the value of the difference λ between the refractive index of the transparent adhesive layer 3 and the refractive index of the first transparent cover plate 221 can be -0.05, -0.04, -0.03, -0.02, -0.01, 0, 0.05, 0.04, 0.03, 0.02, 0.01, etc., or it can be any value between -0.05 and +0.05.

[0096] In some embodiments, the thickness of the transparent adhesive layer 3 is 0.03-0.1 mm. For example, the thickness of the transparent adhesive layer 3 can be 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc., or it can be any value between 0.03-0.1 mm.

[0097] Figure 6 The first structure of the transparent adhesive layer is shown.

[0098] In some embodiments, such as Figure 6 As shown, the transparent adhesive layer 3 is provided with multiple rows of through holes 31. Each row of through holes 31 includes multiple through holes 31 arranged along a first direction, which is the extension direction of the light strip 21. Any two rows of through holes 31 are arranged along a second direction, which is perpendicular to the first direction.

[0099] Taking transparent display panel 1 as an example of a liquid crystal display panel, such as Figure 5 As shown, the transparent display panel 1 in the display module 200 includes a first substrate 11, a second substrate 12, and a liquid crystal layer 13. The first substrate 11 is bonded to the light guide structure layer 22 by a transparent adhesive layer 3. The second substrate 12 is disposed opposite to the first substrate 11, and the liquid crystal layer 13 is located between the first substrate 11 and the second substrate 12.

[0100] Figure 7 This illustrates a structure for pixel unit design on a transparent display panel.

[0101] In some embodiments, such as Figure 7As shown, the transparent display panel 1 includes multiple pixel units 1a; the multiple pixel units 1a are arranged in an array along a first direction and a second direction. In a specific implementation, a plurality of first signal lines G and a plurality of second signal lines S are disposed on the first substrate 11. The plurality of first signal lines G and the plurality of second signal lines S intersect to form the aforementioned plurality of pixel regions, and each pixel region is provided with a pixel unit 1a. The first signal lines G can be gate lines, and the second signal lines S can be data lines. A plurality of pixel electrodes 111 are disposed on the first substrate 11, and each pixel region is provided with one pixel electrode 111.

[0102] like Figure 6 and Figure 7 As shown, the size of the through-hole 31 on the transparent adhesive layer 3 in the second direction is P, and the size of the pixel unit 1a in the second direction is d. P satisfies: P = b * d. The size P of the through-hole 31 on the transparent adhesive layer 3 in the second direction should not be too large or too small, so b satisfies: 2 ≤ b ≤ 3. For example, the value of b can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, etc., or it can be any value between 2 and 3. If b is too small, the size P of the through-hole 31 in the second direction will be too small, increasing the processing difficulty of the transparent adhesive layer 3. If b is too large, the size P of the through-hole 31 in the second direction will be too large, resulting in a larger size of a single through-hole 31. Under the premise that the size of the transparent adhesive layer 3 is fixed, the number of through-holes 31 on the transparent adhesive layer 3 will be reduced, thereby reducing the introduced air layer. At the interface between the light guide structure layer 22 and the air layer, the amount of light that undergoes total internal reflection is reduced. Most of the light emitted from the light guide structure layer 22 toward the transparent display panel 1 is directly incident on the transparent display panel 1, thereby reducing the light uniformity effect of the light guide structure layer 22.

[0103] In one implementation, the pixel unit 1a has a dimension d of 214.5 μm in the second direction. Each via 31 has a dimension P of 429 μm in the second direction.

[0104] In some embodiments, such as Figure 6 As shown, the dimensions of each through hole 31 are equal in the first direction.

[0105] In practice, the through holes 31 on the transparent adhesive layer 3 can be made by screen printing. The size of each through hole 31 is equal in the first and second directions, which facilitates the design of the screen.

[0106] Figure 6 The cross-sections of the through holes 31 shown are all rectangular, but the cross-sections of the through holes 31 can also be other suitable shapes, such as circles, ellipses, or other polygons.

[0107] In some embodiments, the peripheral side of the transparent adhesive layer 3 includes a first side near the light strip 21; the row of through holes 31 near the first side is the first row of through holes 31, and the distance between the first row of through holes 31 and the first side is W1, which satisfies: W1=m*d. The distance W1 between the first row of through holes 31 and the first side should not be too large or too small, so m satisfies: 2≤m≤3; for example, the value of m can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, etc., or it can be any value between 2 and 3.

[0108] In this embodiment, the through holes 31 on the transparent adhesive layer 3 increase in distance from the light strip 21, and the distance between adjacent rows of through holes 31 widens at equal intervals, with the increase in width being ΔW. That is, along the direction away from the light strip 21, the distance between the nth row of through holes 31 and the (n-1)th row of through holes 31 is W. n n is a positive integer greater than 1; W n Satisfy: W n =W1 + (n-1)*ΔW, ΔW = k*d. ΔW should not be too large or too small, therefore k satisfies: 2 ≤ k ≤ 3. For example, the value of k can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, etc., or it can be any value between 2 and 3.

[0109] If m is too small, the distance between the first row of through holes 31 and the first side surface will be too small. Similarly, if k is too small, the distance between the nth row of through holes 31 and the (n-1)th row of through holes 31 will be too small. With a fixed size of the transparent adhesive layer 3, the overall number of through holes 31 increases, thus increasing the amount of air introduced. This increases the amount of light that undergoes total internal reflection at the interface between the light guide structure layer 22 and the air layer, thereby improving the light uniformity of the light guide structure layer 22, but significantly increasing the processing difficulty of the transparent adhesive layer 3. If m is too large, the distance between the first row of through holes 31 and the first side surface will be too large. Similarly, if k is too large, the distance between the nth row of through holes 31 and the (n-1)th row of through holes 31 will be too large. With a fixed size of the transparent adhesive layer 3, the number of through holes 31 on the transparent adhesive layer 3 will decrease, thus reducing the amount of air introduced. At the interface between the light guide structure layer 22 and the air layer, the amount of light that undergoes total internal reflection is reduced. Most of the light emitted from the light guide structure layer 22 toward the transparent display panel 1 is directly incident on the transparent display panel 1, thereby reducing the light uniformity effect of the light guide structure layer 22.

[0110] In some embodiments, the distance between any two adjacent through holes 31 in each row of through holes 31 is equal, which further facilitates the design of the stencil.

[0111] To avoid light leakage at the edges of the display module 200, such as Figure 5As shown, a first reflective film 5 is provided on the side of the light guide strip 222 facing away from the circuit board 211. The first reflective film 5 can reflect the light that is incident on the light guide strip 222 back into the light guide strip 222, thereby preventing light leakage from that side of the light guide strip 222.

[0112] The peripheral side of the first transparent cover plate 221 includes a first side and multiple second sides. The first side is provided with a light guide strip 222, and the second side is provided with a second reflective film 6. The second reflective film 6 can reflect the light that shines from the inside of the first transparent cover plate 221 back into the inside of the first transparent cover plate 221, thereby preventing light leakage from the second side.

[0113] A third reflective film 7 is provided on the peripheral side of the transparent display panel 1. The third reflective film 7 can reflect the light that shines on the transparent display panel 1 from inside the transparent display panel 1 back into the transparent display panel 1, thereby preventing light leakage from the peripheral side of the transparent display panel 1.

[0114] A fourth reflective film 8 is provided on the peripheral side of the second transparent cover plate 4. The fourth reflective film 8 can reflect the light that shines from inside the second transparent cover plate 4 back into the second transparent cover plate 4, thereby preventing light leakage from the periphery of the second transparent cover plate 4.

[0115] In practice, the second reflective film 6, the third reflective film 7, and the fourth reflective film 8 can be multiple independent structures. Alternatively, the second reflective film 6, the third reflective film 7, and the fourth reflective film 8 can be a single integrated structure for easy adhesion.

[0116] Figure 8A The second model of the display module is shown. Figure 8B It shows Figure 8A A schematic diagram of optical power and distance along the x-axis; Figure 8C It shows Figure 8A A schematic diagram of optical power and distance along the y-axis.

[0117] To verify the brightness uniformity of the display module 200, such as Figures 8A-8C As shown, Figure 8A A coordinate system is established with the center of the transparent display panel 1 as the origin, the direction of extension of the parallel light strip 21 as the x-axis, and the direction of extension of the perpendicular light strip 21 as the y-axis. For example... Figure 8B As shown, the distance between each point on the x-axis of the transparent display panel 1 and the light strip 21 is equal, and the optical power at each point on the x-axis does not vary much, showing relatively uniformity. Since brightness is directly proportional to optical power, the brightness at each point on the x-axis of the transparent display panel 1 is relatively uniform. Figure 8C As shown, points on the y-axis of the transparent display panel 1 gradually move away from the light strip 21, along the direction away from the light strip 21, such as... Figure 8CAlong the y-axis, the optical power at each point gradually decreases, with the ratio of the minimum to the maximum optical power being 41.8%. Therefore, in this display module 200, the brightness of the transparent display panel 1 decreases with increasing distance from the light strip 21, and the brightness uniformity is 41.8%. Compared to... Figure 2A The uniformity of the display module 200 is 15.9%, which significantly improves the uniformity of the display module 200.

[0118] Figure 9 The fourth structure of the display module is shown.

[0119] In other embodiments of this application, such as Figure 9 As shown, with Figure 5 The display module 200 shown in the figure differs in structure from that of the light source assembly 2, which is located on the side of the transparent display panel 1 closer to the second substrate 12. In this embodiment, the first transparent cover plate 221 is bonded to the second substrate 12 in the transparent display panel 1 by a transparent adhesive layer 3; the second transparent cover plate 4 is bonded to the first substrate 11 in the transparent display panel 1 by a first optical adhesive layer 41.

[0120] Figure 10 The fifth structure of the display module is shown.

[0121] In other embodiments of this application, such as Figure 10 As shown, the display module 200 includes a transparent display panel 1, a light source assembly 2, and a second optical adhesive layer 3' connecting the transparent display panel 1 and the light source assembly 2. The display module 200 also includes a second transparent cover plate 4, and the second optical adhesive layer 3' is bonded to the transparent display panel 1 via a first optical adhesive layer 41. The light source assembly 2 includes two LED strips 21 and a light guide structure layer 22 located between the two LED strips 21. The light guide structure layer 22 includes a first transparent cover plate 221 and two light guide strips 222, with one light guide strip 222 located between one LED strip 21 and the first transparent cover plate 221.

[0122] Figure 11A The third model of the display module is shown. Figure 11B It shows Figure 11A A schematic diagram of optical power and distance along the x-axis; Figure 11C It shows Figure 11A A schematic diagram of optical power and distance along the y-axis.

[0123] To verify the brightness uniformity of the display module 200, such as Figures 11A-11C As shown, Figure 11A A coordinate system is established with the center of the transparent display panel 1 as the origin, the direction of extension of the parallel light strip 21 as the x-axis, and the direction of extension of the perpendicular light strip 21 as the y-axis. For example... Figure 11BAs shown, the distance between each point on the x-axis of the transparent display panel 1 and the light strip 21 is equal, and the light power at each point on the x-axis does not vary much, showing relatively uniformity. Since brightness is directly proportional to light power, the brightness at each point on the x-axis of the transparent display panel 1 is relatively uniform, and also relatively... Figure 2A and Figure 5 Medium brightness increased. For example... Figure 11C As shown, points on the y-axis of the transparent display panel 1 gradually move away from one side of the light strip 21 and closer to the other side of the light strip 21, along the arrangement direction of the two light strips 21, as... Figure 11C Along the y-axis, the optical power at each point on the y-axis first decreases and then increases, with the ratio of the minimum to the maximum optical power being 55.5%. Therefore, in this display module 200, the brightness of the transparent display panel 1 decreases as the distance from the light strip 21 increases, with a brightness uniformity of 55.5%. Compared to... Figure 2A The display module 200 accounts for 15.9%, and Figure 5 Of the 41.8% of the display modules, the uniformity of the 200 modules was significantly improved.

[0124] Figure 12 The sixth structure of the display module is shown. Figure 13 It shows Figure 12 A structure of a transparent adhesive layer.

[0125] In other embodiments of this application, such as Figure 12 As shown, with Figure 5 The display module 200 shown in the figure differs in structure from the light source assembly 2, which includes two light strips 21 located on opposite sides of the light guide structure layer 22. A light guide strip 222 is provided between each light strip 21 and the first transparent cover plate 221.

[0126] like Figure 13 As shown, the definition Figure 13 The upper light strip 21 is the first light strip 21. Figure 13 The lower light strip 21 is the second light strip 21. (And...) Figure 6 The transparent adhesive layer 3 shown differs in structure in that, in the multiple rows of through holes 31 near the first light strip 21, the distance between adjacent rows of through holes 31 increases at equal intervals with increasing distance from the first light strip 21, with the increase in width being ΔW1. Similarly, in the multiple rows of through holes 31 near the second light strip 21, the distance between adjacent rows of through holes 31 increases at equal intervals with increasing distance from the second light strip 21, with the increase in width being ΔW2. Furthermore, ΔW1 and ΔW2 can be the same or different.

[0127] Figure 14A It shows Figure 12 A schematic diagram showing the optical power and distance along the x-axis of the display module; Figure 14B It shows Figure 12 The diagram shows the optical power and distance along the y-axis of the display module.

[0128] To verify the brightness uniformity of the display module 200, such as Figures 14A-14B As shown, Figure 14A The origin of the coordinate system is Figure 12 The center of the transparent display panel 1 is defined by the x-axis, which is parallel to the extension direction of the light strip 21, and the y-axis, which is perpendicular to the extension direction of the light strip 21. For example... Figure 14B As shown, the distance between each point on the x-axis of the transparent display panel 1 and the light strip 21 is equal. The light power at each point on the x-axis does not vary much and is relatively uniform. Moreover, the light power at most points is greater than 0.04W / mm². 2 Since brightness is directly proportional to optical power, the brightness at various points along the 1x-axis of the transparent display panel is relatively uniform, and also... Figure 2A and Figure 5 Medium brightness increased. For example... Figure 14B As shown, points on the y-axis of the transparent display panel 1 gradually move away from one side of the light strip 21 and closer to the other side of the light strip 21, along the arrangement direction of the two light strips 21, as... Figure 14B Along the y-axis, the optical power at each point on the y-axis first decreases and then increases, with the optical power at most points being greater than 0.04 W / mm. 2 The ratio of the minimum to the maximum optical power is 68.3%. Therefore, in this display module 200, the brightness of the transparent display panel 1 decreases with increasing distance from the light strip 21, and the brightness uniformity is 68.3%. Compared to... Figure 2A The display module 200 accounts for 15.9% of the total. Figure 5 The display module 200 accounts for 41.8%, and Figure 10 The uniformity of the display module 200 is significantly improved, reaching 55.5%.

[0129] Figure 15 The seventh structure of the display module is shown.

[0130] In other embodiments of this application, such as Figure 15 As shown, with Figure 12 The display module 200 shown in the figure has a different structure, except that the light source assembly 2 is located on the side of the transparent display panel 1 closer to the second substrate 12.

[0131] Figure 16 The eighth structure of the display module is shown.

[0132] In other embodiments of this application, such as Figure 16 As shown, with Figure 12 The display module 200 shown in the figure differs in structure from the one shown in the figure, in which light source assemblies 2 are connected to both opposite sides of the transparent display panel 1 along the thickness direction. Each light source assembly 2 includes a light strip 21.

[0133] Figure 17 The ninth structure of the display module is shown.

[0134] In other embodiments of the application, such as Figure 17 As shown, the first substrate 11 of the transparent display panel 1 includes at least one thin-film transistor 112; a reflective layer 113 is disposed on the side of the thin-film transistor 112 facing the liquid crystal layer 13.

[0135] like Figure 17 As shown, the transparent display panel 1 includes a first substrate 11, a liquid crystal layer 13, and a second substrate 12. A thin-film transistor (TFT) 112 is disposed in the first substrate 11 to control the deflection of liquid crystal molecules, thereby controlling the passage of light from the light source assembly 2. A reflective layer 113 is disposed on the side of the TFT 112 facing the liquid crystal layer 13. This reflective layer 113 can reflect light incident on the reflective layer 113 back to the liquid crystal layer 13 and can also block light incident on the TFT 112, affecting its switching characteristics. In specific implementations, the reflective layer 113 can be a metal layer such as silver or aluminum. Meanwhile, the second substrate 12 does not have a color resist layer, and there is no need to set a black matrix (BM) inside. Furthermore, the black matrix (BM) may not be disposed on the peripheral side surfaces of the first substrate 11, thereby reducing the absorption of side light by the black matrix in the display panel.

[0136] Since the transparent display panel 1 provided in this application embodiment does not involve a color filter layer such as a color resist layer, the light-emitting element of the light bar 21 in the light source assembly 2 includes tri-color LED beads, and color display is achieved through field sequence driving.

[0137] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A display module, wherein, include: Transparent display panel; A light source assembly includes a light strip and a light guide structure layer. The light guide structure layer is located on one side of the transparent display panel in the thickness direction, and the light strip is disposed on one peripheral side of the light guide structure layer. The light guide structure layer is used to guide the light beam emitted from the light strip into the transparent display panel. A transparent adhesive layer connects the transparent display panel and the light source assembly; the transparent adhesive layer is provided with a plurality of through holes, each of the through holes penetrating the transparent adhesive layer along the thickness direction of the transparent adhesive layer.

2. The display module according to claim 1, wherein, The transparent adhesive layer is provided with multiple rows of through holes, each row of through holes including multiple through holes arranged along a first direction, the first direction being the extension direction of the light strip; any two rows of through holes are arranged along a second direction, the second direction being perpendicular to the first direction.

3. The display module according to claim 2, wherein, The transparent display panel includes multiple pixel units; the multiple pixel units are arranged in an array along the first direction and the second direction. The size of the through hole in the second direction is P, and the size of the pixel unit in the second direction is d. P satisfies: P = b * d, 2 ≤ b ≤ 3.

4. The display module according to claim 1, wherein, Each of the through holes has the same size in the first direction.

5. The display module according to claim 2, wherein, The transparent display panel includes a plurality of pixel units; the plurality of pixel units are arranged in an array along the first direction and the second direction; the size of the pixel unit in the second direction is d; The peripheral side includes a first side of the transparent adhesive layer near the light strip; The row of through holes closest to the first side is the first row of through holes, and the distance between the first row of through holes and the first side is W1. Along the direction away from the light strip, the distance between the nth row of through holes and the (n-1)th row of through holes is W. n n is a positive integer greater than 1; W1 satisfies: W1=m*d,2≤m≤3; W n Satisfy: W n = W1+(n - 1)*ΔW, ΔW = k*d, 2 ≤ k ≤ 3.

6. The display module according to any one of claims 1-5, wherein, In each row of through holes, the distance between any two adjacent through holes is equal.

7. The display module according to any one of claims 1-6, wherein, The thickness of the transparent adhesive layer is 0.03-0.1 mm.

8. The display module according to any one of claims 1-7, wherein, The light guide structure layer includes: The first transparent cover plate is bonded to the transparent display panel through the transparent adhesive layer; A light guide strip is disposed between the light-emitting side of the light strip and the first transparent cover plate, for guiding the light beam emitted from the light strip into the first transparent cover plate.

9. The display module according to claim 8, wherein, The difference λ between the refractive index of the transparent adhesive layer and the refractive index of the first transparent cover plate satisfies: -0.05≤λ≤0.05; And / or, the thickness of the light guide strip is greater than or equal to the thickness of the lamp strip; And / or, the thickness of the first transparent cover is greater than or equal to the thickness of the light strip.

10. The display module according to any one of claims 8-9, wherein, The light strip includes a circuit board and a light-emitting unit disposed on the circuit board; The light guide strip is fixed to the circuit board and located on the light-emitting side of the light-emitting unit; The circuit board is fixed to the edge of the first transparent cover plate away from the transparent display panel; A first reflective film is provided on the side of the light guide strip away from the circuit board.

11. The display module according to any one of claims 8-10, wherein, The peripheral side of the first transparent cover plate includes a first side and a plurality of second sides. The first side is provided with the light guide strip, and the second side is provided with a second reflective film. And / or, a third reflective film is provided on the peripheral side of the transparent display panel.

12. The display module according to any one of claims 1-11, wherein, There are two light strips, which are located on opposite sides of the light guide structure layer. And / or, the display module further includes a second transparent cover plate, which is located on the side of the transparent display panel opposite to the light guide structure layer.

13. The display module according to any one of claims 1-11, wherein, The transparent display panel is connected to the light source components on both opposite sides along its thickness direction.

14. The display module according to any one of claims 1-13, wherein, The transparent display panel includes: First substrate; The second substrate is disposed opposite to the first substrate; A liquid crystal layer is located between the first substrate and the second substrate; The first substrate includes at least one thin-film transistor; a reflective layer is disposed on the side of the thin-film transistor facing the liquid crystal layer.

15. A display device, wherein, It includes a housing and a display module as claimed in any one of claims 1-14, the display module being located inside the housing.

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