Display device

Abstract

A display device includes a transparent display panel and a reflective module. The transparent display panel is provided with a first display surface and a second display surface opposite to the first display surface, and the reflection module is arranged on the first display surface and comprises a reflection layer and a light diffusion layer; the light diffusion layer and the reflecting layer are sequentially stacked on the first display surface, and the light reflectivity of the reflecting layer is not less than 40%.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a display device having a bidirectional display function. Background Technology

[0002] In existing technologies, display devices with bidirectional display capabilities are typically assembled from two independent display panels, such as two micro light-emitting diode (LED) display panels that can serve as transparent display panels. However, the aforementioned method requires precise alignment and is prone to producing moiré patterns that affect display quality, and it is also relatively expensive. Summary of the Invention

[0003] This invention provides a display device that can achieve bidirectional display function, is simple to manufacture, and has good display quality.

[0004] The display device proposed in at least one embodiment of the present invention includes a transparent display panel and a reflective module. The transparent display panel has a first display surface and a second display surface opposite to the first display surface. The reflective module is disposed on the first display surface and includes a reflective layer and a light diffusion layer. The light diffusion layer and the reflective layer are sequentially stacked on the first display surface, and the light reflectivity of the reflective layer is not less than 40%.

[0005] In at least one embodiment of the present invention, the transparent display panel includes a micro light-emitting diode display panel.

[0006] In at least one embodiment of the present invention, the haze of the light diffusion layer is 10% to 50%.

[0007] In at least one embodiment of the present invention, the reflective layer comprises a reflective polarizer or a metal layer.

[0008] In at least one embodiment of the present invention, when the reflective layer includes the reflective polarizer, the reflective module further includes a linear polarizer. The light diffusion layer, the reflective polarizer, and the linear polarizer are sequentially stacked on the first display surface, and the light transmission axis of the linear polarizer is the same as the light transmission axis of the reflective polarizer.

[0009] In at least one embodiment of the present invention, the display device has a bidirectional display area, and the bidirectional display area corresponds to the reflection module. When the display device is in bidirectional display mode, the bidirectional display area displays reversed graphics on the first display surface, which are then reflected by the reflection module to display forward graphics on the second display surface.

[0010] The display device proposed in at least another embodiment of the present invention includes a transparent display panel and a reflective module. The transparent display panel has a first display surface and a second display surface opposite to the first display surface. The reflective module is disposed on the first display surface and includes a reflective polarizer and a linear polarizer. The reflective polarizer and the linear polarizer are sequentially stacked on the first display surface. The light reflectivity of the reflective polarizer is not less than 40%, and the light transmission axis of the linear polarizer is the same as the light transmission axis of the reflective polarizer.

[0011] In at least another embodiment of the present invention, the transparent display panel comprises a micro light-emitting diode display panel.

[0012] In at least another embodiment of the present invention, the reflective polarizer is a multilayer reflective polarizer or a wire grid polarizer.

[0013] In at least another embodiment of the present invention, the display device has a bidirectional display area, and the bidirectional display area corresponds to the reflection module. When the display device is in bidirectional display mode, the bidirectional display area displays reversed graphics on the first display surface, which are reflected by the reflection module, while the bidirectional display area displays forward graphics on the second display surface. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of a display device according to at least one embodiment of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the cross section drawn along section line a-a'.

[0016] Figure 3A and Figure 3B This is a schematic diagram of the imaging of a display device according to at least one embodiment of the present invention on the first display surface and the second display surface in a bidirectional display mode.

[0017] Figure 4 yes Figure 2 A magnified view of region A in the middle.

[0018] Figure 5 This is an enlarged schematic diagram of a portion of a display device according to at least another embodiment of the present invention.

[0019] Figure 6 This is an enlarged schematic diagram of a portion of a display device according to at least another embodiment of the present invention.

[0020] In the attached figures, the following labels are used:

[0021] 10: Display devices

[0022] 100: Transparent display panel

[0023] 200, 200A, 200A': Reflection module

[0024] 202: Reflective layer

[0025] 202A: Reflective polarizer

[0026] 204: Light diffusion layer

[0027] 206: Linear polarizer

[0028] A: Area

[0029] a-a': section line

[0030] DA: Bidirectional display area

[0031] S1: First display surface

[0032] S2: Second display surface

[0033] SA: One-way display area Detailed Implementation

[0034] In the following text, to clearly present the technical features of the present invention, the dimensions (e.g., length, width, thickness, and depth) of components (e.g., layers, films, substrates, and regions) in the drawings will be enlarged proportionally, and the number of some components may be reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of components in the drawings or the size and shape of the components, but should cover the dimensions, shapes, and deviations from both caused by actual manufacturing processes and / or tolerances. For example, a flat surface shown in the drawings may have rough and / or non-linear characteristics, and an acute angle shown in the drawings may be rounded. Therefore, the components presented in the drawings of the present invention are mainly for illustration and are not intended to accurately depict the actual shape of the components, nor are they intended to limit the scope of the claims of the present invention.

[0035] Secondly, the terms "approximately," "about," or "substantially" used in this invention not only cover explicitly stated numerical values ​​and ranges, but also the permissible deviation range understandable to those skilled in the art to which this invention pertains. This deviation range can be determined by errors generated during measurement, which may arise from limitations of the measurement system or process conditions, for example. For instance, two objects (e.g., planes or traces of a substrate) are "substantially parallel" or "substantially perpendicular," where "substantially parallel" and "substantially perpendicular" respectively represent that the parallelism and perpendicularity between the two objects can include non-parallelism and non-perpendicularity caused by permissible deviation ranges.

[0036] Furthermore, "approximately" can indicate that the value is within one or more standard deviations, such as ±30%, ±20%, ±10%, or ±5%. The terms "approximately," "approximately," or "substantially" used in this invention can be selected based on the optical, etching, mechanical, or other properties to determine an acceptable range of deviations or standard deviations, and are not applied to all optical, etching, mechanical, and other properties using a single standard deviation.

[0037] The spatial relative terms used in this invention, such as "below," "under," "above," and "above," are for the convenience of describing the relative relationship between one component or feature and another, as illustrated in the figures. The true meaning of these spatial relative terms includes other orientations. For example, when the illustration is rotated 180 degrees vertically, the relationship between one component and another may change from "below" or "under" to "above" or "above." Furthermore, the spatial relative descriptions used in this invention should be interpreted in the same way.

[0038] It should be understood that although the present invention may use terms such as "first," "second," and "third" to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used in the present invention may, depending on the specific circumstances, include any combination of one or more of the associated listed items.

[0039] Furthermore, the present invention can be implemented or applied through other different specific embodiments, and the details of the present invention can also be combined, modified and changed in various embodiments based on different viewpoints and applications without departing from the concept of the present invention.

[0040] Figure 1 This is a top view schematic diagram of a display device 10 according to at least one embodiment of the present invention. Figure 2 yes Figure 1 A schematic cross-sectional view drawn along section line a-a'. Please refer to [link / reference]. Figure 1 and Figure 2 The display device 10 includes a transparent display panel 100 and a reflection module 200. The transparent display panel 100 has a first display surface S1 and a second display surface S2 opposite to the first display surface S1, and the reflection module 200 is disposed on the first display surface S1.

[0041] The display device 10 has a bidirectional display area DA corresponding to the reflective module 200 and a unidirectional display area SA not corresponding to the reflective module 200. That is, the area formed by the orthographic projection of the reflective module 200 onto the transparent display panel 100 is the bidirectional display area DA, and the area outside the area formed by the orthographic projection of the reflective module 200 onto the transparent display panel 100 is the unidirectional display area SA. In this embodiment, the bidirectional display area DA is adjacent to and smaller than the unidirectional display area SA, but this is not a limitation of the invention. In other embodiments, the position and size relationship between the bidirectional display area DA and the unidirectional display area SA can be designed according to product requirements.

[0042] Figure 3A and Figure 3B This is a schematic diagram showing the imaging of the display device 10 of at least one embodiment of the present invention on the first display surface S1 and the second display surface S2 in a bidirectional display mode. Please refer to... Figure 2 , Figure 3A and Figure 3B When the display device 10 is in bidirectional display mode, the bidirectional display area DA is located on the first display surface S1 as follows: Figure 3A The reversed graphics (e.g., reversed ABC text) are reflected by the reflection module 200, so that the bidirectional display area DA is on the second display surface S2 as shown. Figure 3B The image shown is a forward-facing graphic (e.g., forward-facing ABC text). Furthermore, the unidirectional display area SA is located on the first display surface S1 as shown... Figure 3A The diagram shows how forward-facing graphics (e.g., forward-facing ABC text) penetrate the second display surface S2, causing the unidirectional display area SA to be visible on the second display surface S2. Figure 3B The image shown is a reversed graphic (e.g., reversed ABC text).

[0043] Figure 4 yes Figure 2 A magnified view of region A in the middle. Please refer to [link / reference]. Figure 4 The reflective module 200 includes a reflective layer 202 and a light diffusion layer 204. The light diffusion layer 204 and the reflective layer 202 are sequentially stacked on the first display surface S1, that is, the light diffusion layer 204 is located between the transparent display panel 100 and the reflective layer 202, and the light reflectivity of the reflective layer 202 is not less than 40%. By reflecting the image of the bidirectional display area DA on the first display surface S1 through the reflective layer 202, the bidirectional display area DA can display the image on the second display surface S2, thereby achieving the bidirectional display function. Furthermore, the light diffusion layer 204 can reduce the rainbow effect caused by reflection of the reflective layer 202 on the second display surface S2, so that the display device 10 can have good display quality in the bidirectional display mode.

[0044] In some embodiments, the haze of the light diffusion layer 204 can be approximately 10% to 50%, and the aforementioned haze range can effectively reduce rainbow patterns and prevent reflective imaging from becoming blurred due to excessive haze. The light reflectivity of the reflective layer 202 can be less than 100%, and the transparent display panel 100 may include a micro light emitting diode (LED) display panel. The reflective layer 202 may include a reflective polarizer or a metal layer. The reflective polarizer may be, for example, a multilayer reflective polarizer or a wiregrid polarizer (WGP).

[0045] Figure 5 This is an enlarged schematic diagram of a portion of a display device according to at least another embodiment of the present invention. Please refer to... Figure 5 , Figure 5 Implementation examples and Figure 4 Most of the components in the embodiments are the same in terms of structure, materials, and relative positional relationships. Figure 5 The top view and cross-sectional view of the display device are essentially the same as Figure 4 The top view and cross-sectional view of the display device 10 are shown, so they will not be described again here. The main difference between the two embodiments is... Figure 5 The reflective module 200A includes a reflective polarizer 202A and a linear polarizer 206.

[0046] In detail, a reflective polarizer 202A and a linear polarizer 206 are sequentially stacked on the first display surface S1, with the reflective polarizer 202A located between the transparent display panel 100 and the linear polarizer 206. The reflective polarizer 202A has a light reflectivity of not less than 40%, and the light transmission axis of the linear polarizer 206 is the same as that of the reflective polarizer 202A. By reflecting the image of the bidirectional display area DA on the first display surface S1 through the reflective polarizer 202A, the bidirectional display area DA displays the image on the second display surface S2, thereby achieving bidirectional display functionality. Furthermore, the linear polarizer 206, whose light transmission axis is the same as that of the reflective polarizer 202A, absorbs external light that can be reflected by the reflective polarizer 202A, allowing only external light that can penetrate the reflective polarizer 202A to pass through, reducing the mirror effect and improving contrast, thus enabling the display device to have good display quality in bidirectional display mode.

[0047] Figure 6 This is an enlarged schematic diagram of a portion of a display device according to at least another embodiment of the present invention. Please refer to... Figure 6 , Figure 6 Implementation examples and Figure 4 Most of the components in the embodiments are the same in terms of structure, materials, and relative positional relationships. Figure 6 The top view and cross-sectional view of the display device are essentially the same as Figure 6The top view and cross-sectional view of the display device 10 are shown, so they will not be described again here. The main difference between the two embodiments is... Figure 6 The reflective module 200A' includes a reflective polarizer 202A, a light diffusion layer 204, and a linear polarizer 206.

[0048] In detail, the light diffusion layer 204, the reflective polarizer 202A, and the linear polarizer 206 are sequentially stacked on the first display surface S1. That is, the light diffusion layer 204 is located between the transparent display panel 100 and the reflective polarizer 202A, the reflective polarizer 202A is located between the light diffusion layer 204 and the linear polarizer 206, and the light transmission axis of the linear polarizer 206 is the same as the light transmission axis of the reflective polarizer 202A. By reflecting the image of the bidirectional display area DA on the first display surface S1 through the reflective polarizer 202A, the bidirectional display area DA displays the image on the second display surface S2, thereby achieving the bidirectional display function. Furthermore, by using the linear polarizer 206 with the same light transmission axis as the reflective polarizer 202A, the external light that can be reflected by the reflective polarizer 202A is absorbed, allowing only the external light that can penetrate the reflective polarizer 202A to pass through, reducing the mirror effect and improving the contrast. In addition, the light diffusion layer 204 can reduce the rainbow pattern caused by the reflection of the reflective polarizer 202A on the second display surface S2, so that the display device can have good display quality in bidirectional display mode.

[0049] The display devices described in the above embodiments can be installed at service counters in public areas such as stations and banks, or in the compartments of first-class cabins on airplanes, so that users on both sides of the display device can simultaneously view bidirectional displayed text and images, which can be applied to needs such as real-time consultation or translation.

[0050] In summary, the display device according to at least one embodiment of the present invention can achieve bidirectional display functionality by reflecting the image of the bidirectional display area on the first display surface through the reflective layer, thereby enabling the bidirectional display area to display the image on the second display surface. Furthermore, the light diffusion layer can reduce the rainbow effect caused by reflection on the second display surface, thus providing good display quality in bidirectional display mode. In addition, when the reflective layer includes a reflective polarizer, the linear polarizer, whose light transmission axis is the same as that of the reflective polarizer, absorbs external light reflected by the reflective polarizer, allowing only external light that can penetrate the reflective polarizer to pass through. This reduces the specular effect and improves contrast, further enhancing the display quality in bidirectional display mode.

[0051] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A display device, characterized in that, include: A transparent display panel has a first display surface and a second display surface opposite to the first display surface; as well as A reflection module, disposed on the first display surface, includes: A reflective layer, wherein the light reflectivity of the reflective layer is not less than 40%; as well as A light diffusion layer, wherein the light diffusion layer and the reflective layer are sequentially stacked on the first display surface.

2. The display device as described in claim 1, characterized in that, The transparent display panel includes a miniature light-emitting diode display panel.

3. The display device as described in claim 1, characterized in that, The haze of this light diffusion layer ranges from 10% to 50%.

4. The display device as claimed in claim 1, characterized in that, The reflective layer includes a reflective polarizer or a metal layer.

5. The display device as described in claim 4, characterized in that, When the reflective layer includes the reflective polarizer, the reflective module further includes: A linear polarizer, wherein the light diffusion layer, the reflective polarizer and the linear polarizer are sequentially stacked on the first display surface, and the light transmission axis of the linear polarizer is the same as the light transmission axis of the reflective polarizer.

6. The display device as claimed in claim 1, characterized in that, The display device has a bidirectional display area, and the bidirectional display area corresponds to the reflection module. When the display device is in a bidirectional display mode, the bidirectional display area displays a reverse image on the first display surface, which is reflected by the reflection module so that the bidirectional display area displays a forward image on the second display surface.

7. A display device, characterized in that, include: A transparent display panel has a first display surface and a second display surface opposite to the first display surface; as well as A reflection module, disposed on the first display surface, includes: A reflective polarizer, wherein the reflective polarizer has a light reflectivity of not less than 40%; as well as A linear polarizer, wherein the reflective polarizer and the linear polarizer are sequentially stacked on the first display surface, and the light transmission axis of the linear polarizer is the same as the light transmission axis of the reflective polarizer.

8. The display device as claimed in claim 7, characterized in that, The transparent display panel includes a miniature light-emitting diode display panel.

9. The display device as claimed in claim 7, characterized in that, The reflective polarizer is a multilayer reflective polarizer or a linear grid polarizer.

10. The display device as claimed in claim 7, characterized in that, The display device has a bidirectional display area, and the bidirectional display area corresponds to the reflection module. When the display device is in a bidirectional display mode, the bidirectional display area displays a reverse image on the first display surface, which is reflected by the reflection module so that the bidirectional display area displays a forward image on the second display surface.

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