Display apparatus

Abstract

A display apparatus is provided with a first flat display area and a bendable display area. The display apparatus includes a first substrate, a second substrate, a first display medium, a first flexible substrate, a second flexible substrate and a plurality of first light emitting devices. The first substrate and the second substrate are disposed in the first flat display area and opposite to each other. The first display medium is disposed between the first substrate and the second substrate and is located in the first flat display area. The first flexible substrate and the second flexible substrate are disposed in the bendable display area and opposite to each other. The plurality of first light emitting devices are disposed between the first flexible substrate and the second flexible substrate and are located in the bendable display area.

Description

[Technical Field]

[0001] The present invention relates to a display device, and more particularly to a bendable display device. [Previous Technology]

[0002] Flexible splicing display devices, which offer high flexibility for different usage scenarios, are gradually gaining market favor. One existing type of flexible splicing display device utilizes LCD panels to splice together the displayed images. To enable this type of splicing display device to be flexible, the two LCD panels are connected by a flexible mechanism. However, this results in discontinuous images and affects the viewing quality. [Summary of the Invention]

[0003] The present invention provides a bendable display device with better integration of splicing display.

[0004] The display device of the present invention includes a first planar display area and a flexible display area. The display device includes a first substrate, a second substrate, a first display medium layer, a first flexible substrate, a second flexible substrate, and a plurality of first light-emitting elements. The first substrate and the second substrate are disposed within the first planar display area and are opposite to each other. The first display medium layer is disposed between the first substrate and the second substrate and is located within the first planar display area. The first flexible substrate and the second flexible substrate are disposed within the flexible display area and are opposite to each other. The plurality of first light-emitting elements are disposed between the first flexible substrate and the second flexible substrate and are located within the flexible display area.

[0005] Based on the above, in a display device according to an embodiment of the present invention, a plurality of light-emitting elements are adapted to be displayed within a flexible display area, thereby improving the continuity of the displayed image between the flat display area and the flexible display area. Furthermore, since these light-emitting elements are disposed between two flexible substrates, the protection of these light-emitting elements is significantly improved.

Implementation Method

[0006] As used herein, “about,” “approximately,” “essentially,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or, for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, as used herein, “about,” “approximately,” “essentially,” or “substantially” may be used to select a more acceptable range of deviations or standard deviations depending on the nature of the measurement, the cutting nature, or other properties, and may not apply to all properties with a single standard deviation.

[0007] In the accompanying drawings, the thicknesses of layers, films, panels, regions, etc., are enlarged for clarity. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it may be directly on or connected to the other element, or intermediate elements may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected" to another element, no intermediate elements are present. As used herein, "connection" may refer to a physical and / or electrical connection. Furthermore, an "electrical connection" may mean the presence of other elements between two elements.

[0008] Furthermore, relative terms such as "below" or "bottom" and "above" or "top" may be used herein to describe the relationship between one element and another, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device other than those shown in the figures. For example, if a device in one figure is flipped, an element described as being "below" the other element will be oriented "above" the other element. Thus, the exemplary term "below" can include both "below" and "above" orientations, depending on the specific orientation of the figure. Similarly, if a device in one figure is flipped, an element described as being "below" or "under" the other element will be oriented "above" the other element. Thus, the exemplary terms "above" or "below" can include both "above" and "below" orientations.

[0009] Exemplary embodiments are described herein with reference to cross-sectional views as schematic representations of idealized embodiments. Therefore, variations in the shape of the illustrations can be anticipated as a result of, for example, manufacturing techniques and / or tolerances. Consequently, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include, for example, shape deviations caused by manufacturing processes. For example, regions shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, acute angles shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to show the precise shapes of the regions, nor are they intended to limit the scope of the claims.

[0010] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0011] FIG1 is a schematic diagram of the display device according to the first embodiment of the present invention when bent. FIG2 is a schematic diagram of the display device of FIG1 when folded. FIG3 is a partially enlarged cross-sectional schematic diagram of the display device of FIG1. ​​Referring to FIG1 and FIG2, in this embodiment, the display device 10 may include a first display panel 110, a second display panel 120 and a bendable display panel 130, wherein the bendable display panel 130 is used to splice the first display panel 110 and the second display panel 120.

[0012] Both the first display panel 110 and the second display panel 120 are flat panel displays, and respectively define a first flat panel display area FDA1 and a second flat panel display area FDA2 of the display device 10. For example, the first display panel 110 and the second display panel 120 may each be electrically connected to the drive circuit board 210 via multiple flexible circuit boards 220, but this is not a limitation. The drive circuit board 210 is used to provide drive signals for the first display panel 110, the second display panel 120, and the flexible display panel 130.

[0013] The bendable display panel 130 defines the bendable display area BDA of the display device 10. It should be noted that the bendable display area BDA connects the first planar display area FDA1 and the second planar display area FDA2, and is used to improve the image consistency when the first display panel 110 and the second display panel 120 of the display device 10 are spliced ​​together. Furthermore, through the connection of the bendable display panel 130, the display device 10 can arbitrarily adjust the included angle θ between the first display panel 110 and the second display panel 120 during operation (as shown in Figure 1) to achieve the desired splicing display effect, or fold the display device 10 to increase its portability (as shown in Figure 2).

[0014] Referring to Figures 1 and 3, in this embodiment, the first display panel 110 may include a substrate 111, a substrate 112, and a display medium layer DM1. Substrate 111 and substrate 112 are disposed within a first planar display area FDA1 and are opposite to each other. The display medium layer DM1 is disposed between substrate 111 and substrate 112 and is located within the first planar display area FDA1. Similarly, the second display panel 120 may include a substrate 121, a substrate 122, and a display medium layer DM2. Substrate 121 and substrate 122 are disposed within a second planar display area FDA2 and are opposite to each other. The display medium layer DM2 is disposed between substrate 121 and substrate 122. In this embodiment, the display medium layer DM1 and display medium layer DM2 may be liquid crystal layers. That is, the first display panel 110 and the second display panel 120 may be, for example, liquid crystal display panels, but are not limited thereto. The materials of substrate 111 and substrate 112 include, for example, glass, quartz, or other rigid materials with high light transmittance.

[0015] For example, substrate 111 and substrate 121 may each be provided with a plurality of pixel structures (not shown) and a plurality of signal lines (not shown). The pixel structure may include active elements (not shown) and pixel electrodes (not shown) that are electrically connected to each other. The plurality of signal lines may include, for example, a plurality of scan lines and a plurality of data lines. The active elements are electrically connected to at least one scan line and at least one data line, but the present invention is not limited thereto.

[0016] On the other hand, a light-shielding layer 115 and a color filter layer CF may be provided on the substrate 112, wherein the light-shielding layer 115 has a plurality of openings 115op1 overlapping the display medium layer DM1, and a plurality of filter patterns of the color filter layer CF are respectively provided in these openings 115op1 of the light-shielding layer 115. Similarly, a light-shielding layer 125 and a color filter layer CF may be provided on the substrate 122, wherein the light-shielding layer 125 has a plurality of openings 125op1 overlapping the display medium layer DM2. A plurality of filter patterns of the color filter layer CF are respectively provided in these openings 125op1 of the light-shielding layer 125, and these filter patterns may have a variety of filter colors, such as red, green and blue, but are not limited thereto.

[0017] It should be noted that the above-mentioned overlapping relationship is defined, for example, along the normal direction (e.g., direction Z) of the surface 111s of the substrate 111. Unless otherwise specified below, the overlapping relationship between the two components is defined in this way, and the overlapping direction will not be described again.

[0018] Further, the first display panel 110 may also include a frame adhesive pattern SP1 disposed between substrate 111 and substrate 112. The second display panel 120 may also include a frame adhesive pattern SP2 disposed between substrate 121 and substrate 122. More specifically, the frame adhesive pattern SP1 is used to connect substrate 111 and substrate 112, and defines an accommodating space AS1 with the two substrates 111 and 112. The frame adhesive pattern SP2 is used to connect substrate 121 and substrate 122, and defines an accommodating space AS2 with the two substrates 121 and 122. A display dielectric layer DM1 (e.g., a liquid crystal layer) fills the accommodating space AS1, while a display dielectric layer DM2 (e.g., a liquid crystal layer) fills the accommodating space AS2. The materials of the frame adhesive pattern SP1 and the frame adhesive pattern SP2 include, for example, OCR (optical clear resin) adhesive, OCA (optical clear adhesive) adhesive, or other adhesives with high light transmittance, or the above-mentioned materials doped with diffusion particles.

[0019] Since the first display panel 110 and the second display panel 120 in this embodiment are liquid crystal display panels, each of them is also provided with a backlight module (BLU). The backlight module (BLU) can serve as an illumination source when the first display panel 110 or the second display panel 120 is displaying. It should be noted that the present invention does not limit the driving mode of the liquid crystal layer in the liquid crystal display panel, such as twisted nematic (TN) mode, vertical alignment (VA) mode, electrically controlled birefringence (ECB) mode, in-plane switching (IPS) mode, or other suitable driving modes. Therefore, the electrode configuration of the first display panel 110 and the second display panel 120 for driving the liquid crystal layer can be configured according to the actual driving mode design, and the present invention does not limit it.

[0020] On the other hand, in this embodiment, the bendable display panel 130 includes a flexible substrate 131, a flexible substrate 132, and a plurality of light-emitting elements LED1. The flexible substrates 131 and 132 are disposed within the bendable display area BDA and are opposite to each other. The materials of the flexible substrates 131 and 132 include, for example, polyimide (PI), polyethylene terephthalate (PET), or other flexible sheets with high light transmittance. The plurality of light-emitting elements LED1 are disposed between the flexible substrates 131 and 132 and are located within the bendable display area BDA. More specifically, these light-emitting elements LED1 are electrically bonded to the surface 131s of the flexible substrate 131. For example, the plurality of light-emitting elements LED1 may have multiple emission colors, such as red, green, and blue, but are not limited thereto.

[0021] For example, the flexible substrate 131 may be provided with a plurality of pixel circuits (not shown) and a plurality of signal lines (not shown). The pixel circuit may include at least one active element, at least one storage capacitor and a driving electrode. The plurality of signal lines may include, for example, a plurality of scan lines, a plurality of data lines and a plurality of power lines. The pixel circuit may be electrically connected to a corresponding scan line, a data line and a power line, but the present invention is not limited thereto. On the other hand, the surface 132s of the flexible substrate 132 may be provided with a light-shielding layer 135, wherein the light-shielding layer 135 has a plurality of openings 135op overlapping the plurality of light-emitting elements LED1.

[0022] It should be noted that the light-emitting elements LED1 disposed in the flexible display area BDA can significantly improve the image continuity in the first planar display area FDA1, the flexible display area BDA and the second planar display area FDA2. On the other hand, by disposing of multiple light-emitting elements LED1 between the flexible substrate 131 and the flexible substrate 132, the protection of these light-emitting elements LED1 can be significantly improved.

[0023] To further improve the image continuity between the first planar display area FDA1 and the flexible display area BDA, the first display panel 110 may further include a plurality of light-emitting elements LED2 disposed between substrate 111 and substrate 112. These light-emitting elements LED2 may be electrically bonded to the surface 111s of substrate 111 and located within the edge display area EDA1 connecting the first planar display area FDA1 and the flexible display area BDA. For example, the plurality of light-emitting elements LED2 may have multiple emission colors, such as red, green and blue, but are not limited thereto.

[0024] Similarly, to further improve the image continuity between the second planar display area FDA2 and the flexible display area BDA, the second display panel 120 may also include a plurality of light-emitting elements LED3 disposed between substrate 121 and substrate 122. These light-emitting elements LED3 may be electrically bonded to the surface 121s of substrate 121 and are located within the edge display area EDA2 connecting the second planar display area FDA2 and the flexible display area BDA. For example, the plurality of light-emitting elements LED3 may have a variety of light-emitting colors, such as red, green and blue, but are not limited thereto. In this embodiment, the light-emitting elements LED1, LED2 and LED3 are, for example, micro light-emitting diodes (micro-LEDs) or sub-millimeter light-emitting diodes (mini-LEDs), but are not limited thereto.

[0025] In this embodiment, a plurality of light-emitting elements LED1 are arranged at intervals of pitch P1 on the surface 131s of the flexible substrate 131 along a direction (e.g., direction X) parallel to the surface 131s of the flexible substrate 131. A plurality of light-emitting elements LED2 are arranged at intervals of pitch P2 on the surface 111s of the substrate 111 along the same direction. A plurality of light-emitting elements LED3 are arranged at intervals of pitch P3 on the surface 121s of the substrate 121 along the same direction. Preferably, pitches P1, P2, and P3 may be equal to each other, but are not limited thereto.

[0026] On the other hand, the light-shielding layer 115 disposed on the substrate 112 also has a plurality of openings 115op2 overlapping the plurality of light-emitting elements LED2, and the light-shielding layer 125 disposed on the substrate 122 also has a plurality of openings 125op2 overlapping the plurality of light-emitting elements LED3. In order to adjust the light emission uniformity of the plurality of light-emitting elements LED1 to LED3 in the edge display area EDA1 of the first display panel 110, the edge display area EDA2 of the second display panel 120 and the flexible display panel 130, the aperture ratio of the light-shielding layer 115 in the edge display area EDA1, the aperture ratio of the light-shielding layer 125 in the edge display area EDA2 and the aperture ratio of the light-shielding layer 135 in the flexible display area BDA can be different from each other.

[0027] For example, in this embodiment, a plurality of openings 135op of the light-shielding layer 135 are arranged at intervals of pitch P4 on the surface 132s of the flexible substrate 132 along a direction (e.g., direction X) parallel to the surface 132s of the flexible substrate 132. A plurality of openings 115op2 of the light-shielding layer 115 are arranged at intervals of pitch P5 along this direction on the surface 112s of the substrate 112. A plurality of openings 125op2 of the light-shielding layer 125 are arranged at intervals of pitch P6 along this direction on the surface 122s of the substrate 122. In this embodiment, the pitch P4 may not be equal to the pitches P5 and P6, but is not limited thereto.

[0028] In this embodiment, the flexible display panel 130 may further include an optical adhesive layer 137. The optical adhesive layer 137 is disposed between the flexible substrate 131 and the flexible substrate 132, and covers a plurality of light-emitting elements LED1 and a light-shielding layer 135. The material of the optical adhesive layer 137 includes, for example, OCR (optical clear resin) adhesive, OCA (optical clear adhesive) adhesive, or other adhesives with high light transmittance, or the above-mentioned materials doped with diffusion particles. Specifically, the aforementioned frame adhesive pattern SP1 is located within the edge display area EDA1 and covers a plurality of light-emitting elements LED2 and part of the light-shielding layer 115, while the aforementioned frame adhesive pattern SP2 is located within the edge display area EDA2 and covers a plurality of light-emitting elements LED3 and part of the light-shielding layer 125.

[0029] It is particularly noteworthy that, in any direction (e.g., direction X) parallel to the surface 111s of the substrate 111, the surface 131s of the flexible substrate 131 can be aligned with the surface 111s of the substrate 111 and the surface 121s of the substrate 121. On the other hand, in any direction (e.g., direction X) parallel to the surface 112s of the substrate 112, the surface 132s of the flexible substrate 132 can be aligned with the surface 112s of the substrate 112 and the surface 122s of the substrate 122.

[0030] In order to improve the support of the display device 10 within the bendable display area BDA, the display device 10 may also include a hinge structure 190 disposed within the bendable display area BDA and located on the side of the flexible substrate 131 facing away from the plurality of light-emitting elements LED1.

[0031] The following will list some other embodiments to illustrate the present invention in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the foregoing embodiments, and will not be repeated below.

[0032] FIG4 is a cross-sectional schematic diagram of a display device according to a second embodiment of the present invention. FIGS. 5A to 5C are cross-sectional schematic diagrams of the manufacturing process of the display device of FIG4. Referring to FIG4, the difference between the display device 10A of this embodiment and the display device 10 of FIG3 is that the structural configuration of the first planar display area FDA1 of the display device is different.

[0033] It should be noted that in this embodiment, the display device 10A is formed by splicing a first display panel 110A and a second display panel 120. In addition to defining the first planar display area FDA1 of the display device 10A, the first display panel 110A also defines a bendable display area BDA.

[0034] Specifically, in the display device 10A of this embodiment, flexible substrates 131A and 132A extend from the bendable display area BDA into the first planar display area FDA1. The display dielectric layer DM1-A extends into the edge display area EDA1 and the bendable display area BDA, and covers a plurality of light-emitting elements LED1 and a plurality of light-emitting elements LED2. It is particularly noteworthy that the portion of flexible substrate 131A located in the first planar display area FDA1 is situated between substrate 111 and the frame adhesive pattern SP1-A, while the portion of flexible substrate 132A located in the first planar display area FDA1 is situated between substrate 112 and the frame adhesive pattern SP1-A. More specifically, the frame adhesive pattern SP1-A is disposed between flexible substrates 131A and 132A. Multiple light-emitting elements LED2 located in the edge display area EDA1 are electrically bonded to the surface 131s of the flexible substrate 131A, and the light-shielding layer 115A located in the first planar display area FDA1 is formed on the surface 132s of the flexible substrate 132A.

[0035] Unlike the previous embodiment, where the multiple pixel structures and multiple signal lines used to drive the display medium layer DM in FIG3 are formed on the substrate 111, in this embodiment, the multiple pixel structures (not shown) and multiple signal lines (not shown) used to drive the display medium layer DM1-A are formed on the flexible substrate 131A.

[0036] On the other hand, in this embodiment, the frame adhesive pattern SP1-A of the first display panel 110A extends from the first planar display area FDA1 to the side of the flexible display area BDA away from the first planar display area FDA1, and is adjacent to the frame adhesive pattern SP2 of the second display panel 120. That is, in this embodiment, there is no optical adhesive layer 137 as shown in FIG3 between the frame adhesive pattern SP1-A and the frame adhesive pattern SP2, and the display medium layer DM1-A and the display medium layer DM2 are separated by the frame adhesive pattern SP1-A and the frame adhesive pattern SP2. In this embodiment, the flexible substrate 131A, the flexible substrate 132A, and the frame adhesive pattern SP1-A surrounding the first planar display area FDA1 and the flexible display area BDA define an accommodating space AS1-A for filling the display medium layer DM1-A.

[0037] The manufacturing process of the display device 10A will be described exemplarily below.

[0038] First, a first liquid crystal cell LCC1” as shown in FIG5A and a second liquid crystal cell LCC2 as shown in FIG5C are fabricated respectively. Referring to FIG5A, for example, the manufacturing method of the first liquid crystal cell LCC1” may include: forming a flexible substrate 131A on a substrate 111”, electrically bonding a plurality of light-emitting elements LED1 and a plurality of light-emitting elements LED2 to the flexible substrate 131A, forming a flexible substrate 132A on a substrate 112”, forming a light-shielding layer 115A, a light-shielding layer 135A and a color filter layer CF on the flexible substrate 132A, assembling the substrate 111” and the substrate 112” to create an accommodating space AS1-A between the flexible substrate 131A and the flexible substrate 132A, and filling the accommodating space AS1-A with a display medium layer DM1-A. In this embodiment, the light-shielding layer 115A and the light-shielding layer 135A can be the same film layer, that is, the light-shielding layer 115A and the light-shielding layer 135A can be formed in the same process, but this is not a limitation.

[0039] Next, the portions of substrate 111” overlapping with the plurality of light-emitting elements LED1 and the portions of substrate 112” overlapping with the plurality of light-emitting elements LED1 are removed to expose the portions of flexible substrate 131A and flexible substrate 132A that overlap with the plurality of light-emitting elements LED1, as shown in FIG5B. Since flexible substrate 131A and flexible substrate 132A are flexible, the portions of flexible substrate 131A and flexible substrate 132A exposed after removing portions of substrate 111” and substrate 112” can define the bendable display area BDA of the first liquid crystal cell LCC1, as shown in FIG5C. The portions of substrate 111” and substrate 112” that are not removed serve as substrate 111 and substrate 112 respectively, and define the first planar display area FDA1 of the first liquid crystal cell LCC1.

[0040] Referring to FIG5C, for example, the manufacturing method of the second liquid crystal cell LCC2 may include: electrically bonding a plurality of light-emitting elements LED3 to a substrate 121; forming a light-shielding layer 125 and a color filter layer CF on a substrate 122; assembling the substrates 121 and 122 to create an accommodating space AS2 between the substrates 121 and 122; and filling the accommodating space AS2 with a display medium layer DM2. After the fabrication of the first liquid crystal cell LCC1 and the second liquid crystal cell LCC2 is completed, the first liquid crystal cell LCC1 and the second liquid crystal cell LCC2 are spliced ​​together. Referring to FIG4 and FIG5C, a backlight module BLU is then provided on the side of the substrate 111 opposite to the display medium layer DM1-A, and a hinge structure 190 is provided on the exposed flexible substrate 131A to form a first display panel 110A. Another backlight module BLU is provided on the side of the substrate 121 opposite to the display medium layer DM2 to form a second display panel 120. This completes the fabrication of the display device 10A shown in Figure 4.

[0041] It is particularly noteworthy that, in any direction (e.g., direction X) parallel to the surface 131s of the flexible substrate 131A, the surface 131s of the flexible substrate 131A can be aligned with the surface 121s of the substrate 121.

[0042] FIG6 is a cross-sectional schematic diagram of a display device according to a third embodiment of the present invention. FIG7A is a top schematic diagram of the light-shielding layer of FIG6. FIG7B is a top schematic diagram of another embodiment of the light-shielding layer of FIG6. Referring to FIG6, the difference between the display device 10B of this embodiment and the display device 10A of FIG4 is that the structural configuration of the second plane display area FDA2 of the display device is different.

[0043] It should be noted that in this embodiment, the display device 10B is not composed of at least two display panels spliced ​​together as shown in Figure 3 or Figure 4, but is composed of a single display panel. For example, in this embodiment, the first planar display area FDA1, the second planar display area FDA2, and the bendable display area BDA of the display device 10B are all defined by the first display panel 110B.

[0044] In detail, compared to the flexible substrate 131A, flexible substrate 132A, and display medium layer DM1-A in FIG4, the flexible substrate 131B, flexible substrate 132B, and display medium layer DM of the first display panel 110B in this embodiment can also extend into the second planar display area FDA2. It is particularly noteworthy that the portion of the flexible substrate 132B located in the second planar display area FDA2 is situated between the substrate 121 and the frame adhesive pattern SP, while the portion of the flexible substrate 132B located in the second planar display area FDA2 is situated between the substrate 122 and the frame adhesive pattern SP. Therefore, in this embodiment, the plurality of light-emitting elements LED3 located in the edge display area EDA2 are electrically bonded to the flexible substrate 131B, and the display medium layer DM also covers these light-emitting elements LED3. The light-shielding layer 115A located in the first planar display area FDA1, the light-shielding layer 125A located in the second planar display area FDA2, and the light-shielding layer 135A located in the flexible display area BDA can be the same film layer formed on the flexible substrate 132B, but are not limited thereto.

[0045] On the other hand, in this embodiment, the frame adhesive pattern SP of the first display panel 110B can extend from the side of the first planar display area FDA1 away from the flexible display area BDA to the side of the second planar display area FDA2 away from the flexible display area BDA. The flexible substrate 131B, the flexible substrate 132B, and the frame adhesive pattern SP surrounding the first planar display area FDA1, the flexible display area BDA, and the second planar display area FDA2 define an accommodating space AS for filling the display medium layer DM.

[0046] Since the manufacturing method of the first display panel 110B in this embodiment is similar to that of the first display panel 110A in FIG4, detailed descriptions can be found in the relevant paragraphs of the foregoing embodiments, and will not be repeated here.

[0047] Referring to Figures 6 and 7A, in this embodiment, the orthographic projection outline of each of the plurality of openings 135op of the light-shielding layer 135A located in the flexible display area BDA on the flexible substrate 132B is, for example, circular, but not limited thereto. In another embodiment, the orthographic projection outline of each of the plurality of openings 135op” of the light-shielding layer 135B on the flexible substrate 132B can also be square (as shown in Figure 7B). It should be noted that the design of the opening outline of the light-shielding layer can be adjusted according to the actual light emission pattern required in the flexible display area BDA, and the present invention does not limit it.

[0048] On the other hand, in this embodiment, in order to adjust the light emission uniformity or light emission pattern of the edge display area EDA1 and the flexible display area BDA of the first planar display area FDA1, the orthographic projection contours (e.g., the square shown in FIG. 7B) of each of the plurality of openings 115op2 of the light-shielding layer 115A on the flexible substrate 132B may be different from the orthographic projection contours (e.g., the circle shown in FIG. 7A) of each of the plurality of openings 135op2 of the light-shielding layer 135A on the flexible substrate 132B. Similarly, in order to adjust the light emission uniformity or light emission pattern of the edge display area EDA2 and the flexible display area BDA of the second planar display area FDA2, the orthographic projection contours of each of the plurality of openings 125op2 of the light-shielding layer 125A on the flexible substrate 132B may also be different from the orthographic projection contours of each of the plurality of openings 135op of the light-shielding layer 135A on the flexible substrate 132B.

[0049] In summary, in a display device according to an embodiment of the present invention, a plurality of light-emitting elements are adapted to be displayed within a flexible display area to improve the continuity of the displayed image between the flat display area and the flexible display area. Furthermore, since these light-emitting elements are disposed between two flexible substrates, the protection of these light-emitting elements is significantly improved. [Simplified Explanation of the Diagram]

[0050] FIG1 is a schematic diagram of the display device according to the first embodiment of the present invention when bent. FIG2 is a schematic diagram of the display device of FIG1 when folded. FIG3 is a partially enlarged cross-sectional view of the display device of FIG1. ​​FIG4 is a cross-sectional view of the display device according to the second embodiment of the present invention. FIG5A to FIG5C are cross-sectional views of the manufacturing process of the display device of FIG4. FIG6 is a cross-sectional view of the display device according to the third embodiment of the present invention. FIG7A is a top view of the light-shielding layer of FIG6. FIG7B is a top view of another embodiment of the light-shielding layer of FIG6.

Claims

1. A display device comprising a first planar display area and a bendable display area, the display device comprising: A first substrate and a second substrate are disposed within the first planar display area and are opposite to each other; A first display medium layer is disposed between the first substrate and the second substrate and located within the first planar display area; a first flexible substrate and a second flexible substrate are disposed within the bendable display area and are opposite to each other; a plurality of first light-emitting elements are disposed between the first flexible substrate and the second flexible substrate and located within the bendable display area; a plurality of second light-emitting elements are disposed between the first substrate and the second substrate, wherein the first planar display area includes a first edge display area connecting the bendable display area, the second light-emitting elements are located within the first edge display area, the first light-emitting elements are arranged on the first flexible substrate at a first pitch interval along a direction, the second light-emitting elements are arranged on the first substrate at a second pitch interval along the same direction, and the first pitch is equal to the second pitch; An optical adhesive layer is disposed between the first flexible substrate and the second flexible substrate and covers the first light-emitting elements; and a first frame adhesive pattern is disposed between the first substrate and the second substrate and covers the second light-emitting elements, wherein the first substrate, the second substrate and the first frame adhesive pattern define a first accommodating space, and the first display medium layer fills the first accommodating space.

2. The display device as claimed in claim 1, further comprising: A first light-shielding layer is disposed on the second flexible substrate; And a second light-shielding layer is disposed on the second substrate, wherein the aperture ratio of the first light-shielding layer in the bendable display area is different from the aperture ratio of the second light-shielding layer in the first edge display area.

3. The display device as claimed in claim 2, wherein the first light-shielding layer has a plurality of first openings located within the flexible display area, the first openings being disposed corresponding to the first light-emitting elements, the second light-shielding layer has a plurality of second openings located within the first edge display area, the second openings being disposed corresponding to the second light-emitting elements, and the orthographic projection outline of each of the first openings on the second flexible substrate is different from the orthographic projection outline of each of the second openings on the second substrate.

4. The display device as claimed in claim 2, wherein the first light-shielding layer has a plurality of first openings located within the bendable display area, the second light-shielding layer has a plurality of second openings located within the first edge display area, the first openings being arranged at a third pitch interval along the direction, the second openings being arranged at a fourth pitch interval along the direction, and the third pitch not being equal to the fourth pitch.

5. The display device as claimed in claim 2, wherein the second flexible substrate extends to the first planar display area and is located between the second substrate and the second light-shielding layer, wherein the first light-shielding layer and the second light-shielding layer are the same film layer.

6. The display device of claim 1, wherein the first light-emitting elements are electrically bonded to a first surface of the first flexible substrate, the second light-emitting elements are electrically bonded to a second surface of the first substrate, and the first surface of the first flexible substrate is aligned with the second surface of the first substrate along the direction.

7. The display device as claimed in claim 6, further comprising a second planar display area, the display device further comprising: A third substrate and a fourth substrate are disposed within the second planar display area and are opposite to each other; A second display medium layer is disposed between the third substrate and the fourth substrate, and is located within the second planar display area; A second frame adhesive pattern is disposed between the third substrate and the fourth substrate, wherein the bendable display area connects the first planar display area and the second planar display area, the third substrate, the fourth substrate and the second frame adhesive pattern define a second accommodating space, and the second display medium layer fills the second accommodating space.

8. The display device as claimed in claim 7, further comprising: Multiple third light-emitting elements are disposed between the third substrate and the fourth substrate, wherein the second planar display area includes a second edge display area connecting the bendable display area, the third light-emitting elements are located in the second edge display area, and the third light-emitting elements are arranged on the third substrate at a third pitch interval along the direction, and the third pitch is equal to the first pitch.

9. The display device of claim 8, wherein the third light-emitting elements are electrically bonded to a third surface of the third substrate, and the third surface of the third substrate is aligned with the first surface of the first flexible substrate along the direction.

10. The display device of claim 8, wherein the second frame adhesive pattern covers the third light-emitting elements, and the optical adhesive layer connects the first frame adhesive pattern and the second frame adhesive pattern.

11. The display device as claimed in claim 1, further comprising: A hinge structure is disposed within the bendable display area and located on the side of the first flexible substrate opposite to the first light-emitting elements.

12. A display device comprising a first planar display area and a bendable display area, the display device comprising: A first substrate and a second substrate are disposed within the first planar display area and are opposite to each other; A first display medium layer is disposed between the first substrate and the second substrate and located within the first planar display area; a first flexible substrate and a second flexible substrate are disposed within the bendable display area and are opposite to each other; a plurality of first light-emitting elements are disposed between the first flexible substrate and the second flexible substrate and located within the bendable display area; and a plurality of second light-emitting elements are disposed between the first substrate and the second substrate, wherein the first planar display area includes a first edge display area connecting the bendable display area, the second light-emitting elements are located within the first edge display area, the first light-emitting elements are arranged at a first pitch interval along a direction on the first flexible substrate, the second light-emitting elements are arranged at a second pitch interval along the direction on the first substrate, and the first pitch is equal to the second pitch, wherein the first flexible substrate and the second flexible substrate extend into the first planar display area, the first display medium layer extends into the first edge display area and the bendable display area, and covers the first light-emitting elements and the second light-emitting elements.

13. The display device as claimed in claim 12, further comprising a second planar display area, the display device further comprising: A third substrate and a fourth substrate are disposed within the second planar display area, wherein the bendable display area connects the first planar display area and the second planar display area, and the first flexible substrate, the second flexible substrate and the first display medium layer further extend into the second planar display area; A frame adhesive pattern is disposed between the first flexible substrate and the second flexible substrate, wherein the first flexible substrate, the second flexible substrate and the frame adhesive pattern define an accommodating space, and the first display medium layer fills the accommodating space.

14. The display device as claimed in claim 13, further comprising: Multiple third light-emitting elements are disposed between the third substrate and the fourth substrate, wherein the second planar display area includes a second edge display area connecting the flexible display area, the third light-emitting elements are located in the second edge display area, and the third light-emitting elements are arranged on the first flexible substrate at a third pitch interval along the direction, and the third pitch is equal to the first pitch.

15. The display device of claim 14, wherein the first light-emitting elements, the second light-emitting elements and the third light-emitting elements are electrically bonded to the first flexible substrate.

16. The display device as claimed in claim 12, further comprising a second planar display area, the display device further comprising: A third substrate and a fourth substrate are disposed within the second planar display area and are opposite to each other, wherein the flexible display area connects the first planar display area and the second planar display area; a second display dielectric layer is disposed between the third substrate and the fourth substrate and is located within the second planar display area; a first frame adhesive pattern is disposed between the first flexible substrate and the second flexible substrate and is located between the first display dielectric layer and the second display dielectric layer, wherein the first flexible substrate, the second flexible substrate and the first frame adhesive pattern define a first accommodating space, and the first display dielectric layer fills the first accommodating space.

17. The display device as claimed in claim 16, further comprising: A plurality of third light-emitting elements are disposed between the third substrate and the fourth substrate, wherein the second planar display area includes a second edge display area connecting the bendable display area, the third light-emitting elements are located in the second edge display area, and the third light-emitting elements are arranged on the third substrate at a third pitch interval along the direction, the third pitch being equal to the first pitch; and a second frame adhesive pattern is disposed in the second edge display area and covers the third light-emitting elements, wherein the third substrate, the fourth substrate and the second frame adhesive pattern define a second accommodating space, and the second display medium layer fills the second accommodating space.

18. The display device of claim 17, wherein the first light-emitting elements and the second light-emitting elements are electrically bonded to a first surface of the first flexible substrate, the third light-emitting elements are electrically bonded to a second surface of the third substrate, and the first surface of the first flexible substrate is aligned with the second surface of the third substrate.

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