Display device

Abstract

This invention discloses a display device comprising a substrate, a first light-emitting element, a second light-emitting element, and an optical film. The first and second light-emitting elements are disposed on the substrate. The first light-emitting element emits first light having a first wavelength range, and the second light-emitting element emits second light having a second wavelength range. The optical film is disposed on the first and second light-emitting elements. The optical film includes a first region and a second region. The first region includes a first cholesteric liquid crystal that reflects light at least within the first wavelength range, and the second region includes a second cholesteric liquid crystal that reflects light at least within the second wavelength range.

Description

Technical Field

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

[0002] With the advancement of technology, the forms and applications of display devices are constantly evolving. Transparent display devices have now been developed, which are display panels with a certain degree of transparency, allowing users on both the front and back of the transparent display to see the displayed image, as well as the scene on the other side of the transparent display relative to the user. However, these two-way transparent display devices suffer from image ghosting because the light emitted by their self-emissive elements may be scattered at a large angle before reflecting to the back of the transparent display, and the reflected light intensity is low. Therefore, how to achieve good display quality on both the front and back of a transparent display device is a problem that needs to be solved. Summary of the Invention

[0003] The present invention provides a display device that can display images on both its front and back sides simultaneously and has a good display effect.

[0004] A display device according to an embodiment of the present invention includes a substrate, a first light-emitting element, a second light-emitting element, and an optical film. The first light-emitting element and the second light-emitting element are disposed on the substrate. The first light-emitting element emits first light having a first wavelength range, and the second light-emitting element emits second light having a second wavelength range. The optical film is disposed on the first light-emitting element and the second light-emitting element. The optical film includes a first region and a second region. The first region includes a first cholesteric liquid crystal that reflects light at least within the first wavelength range, and the second region includes a second cholesteric liquid crystal that reflects light at least within the second wavelength range.

[0005] Based on the above, the display device of the present invention includes an optical film disposed on a light-emitting element. The optical film includes a first region and a second region. The first region includes a first cholesteric liquid crystal that reflects at least a first wavelength range, and the second region includes a second cholesteric liquid crystal that reflects at least a second wavelength range. This allows light emitted by the light-emitting element to pass through the corresponding region of the optical film, partially penetrating to the front of the display device, while the other part is reflected to the back of the display device. This enables the same image to be displayed on both the front and back of the display device, and both have good display effects. Attached Figure Description

[0006] Figure 1A This is a layered schematic diagram of a display device according to an embodiment of the present invention;

[0007] Figure 1BThis is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention;

[0008] Figure 2A This is a layered schematic diagram of a display device according to another embodiment of the present invention;

[0009] Figure 2B This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention;

[0010] Figure 3A This is a layered schematic diagram of a display device according to another embodiment of the present invention;

[0011] Figure 3B This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention;

[0012] Figure 4 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention;

[0013] Figure 5A This is a layered schematic diagram of a display device according to another embodiment of the present invention;

[0014] Figure 5B This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0015] Symbol Explanation

[0016] 10, 20, 30, 40: Display devices

[0017] 100,300:Substrate

[0018] 102,302: Substrate

[0019] 104, 304: Line Structure

[0020] 104a, 304a: Drive circuit area

[0021] 104b, 304b: Wiring area

[0022] 110: Light-emitting element

[0023] 112: First light-emitting element

[0024] 114: Second light-emitting element

[0025] 116: Third light-emitting element

[0026] 120: Protective layer

[0027] 130, 230, 330, 430: Optical films

[0028] 132,232,432: First optical film

[0029] 134,234,434: Second optical film

[0030] 136,436: Third optical film

[0031] 140: Adhesive layer

[0032] 150: Cover plate

[0033] 232a, 432a: First pattern part

[0034] 232b, 432b: First isolation section

[0035] 234a, 434a: Second pattern section

[0036] 234b, 434b: Second isolation section

[0037] 332: Isolation component

[0038] 436a: Third pattern part

[0039] 436b: Third Isolation Section

[0040] A-A',B-B',C-C',D-D': Section lines

[0041] BS: Back

[0042] D1: First Direction

[0043] D2: Second Direction

[0044] FS: Front

[0045] L1: First incident light

[0046] L1', L2': Reflected light

[0047] L2: Second incident light

[0048] ND: Normal direction

[0049] R1,R1': Penetration Zone

[0050] R2,R2': Non-penetrating region

[0051] TL1,TL1': First routing area

[0052] TL2, TL2': Second routing area

[0053] W1, W2: Width

[0054] Z11, Z21, Z31, Z41: Zone 1

[0055] Z12, Z22, Z32, Z42: Second Zone

[0056] Z13, Z33, Z43: Third District

[0057] d1, d2, h: Distance

[0058] θ1,θ 2: Angle of incidence Detailed Implementation

[0059] In the accompanying drawings, the thicknesses of layers, films, panels, regions, etc., are enlarged for clarity. Throughout the specification, the same reference numerals denote the same elements. 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" can refer to physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may refer to the presence of other elements between two elements.

[0060] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, and / or parts should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or part from another. Therefore, "first element," "component," "region," "layer," or "part" discussed below may be referred to as a second element, component, region, layer, or part without departing from the teachings of this document.

[0061] Figure 1A This is a layered schematic diagram of a display device according to an embodiment of the present invention. Figure 1B This is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention. Figure 1B It can be along Figure 1A A cross-sectional view of one embodiment along section line A-A'. For clarity, Figure 1A Some components are omitted from the drawing; please refer to the reference for the omitted parts. Figure 1B To understand.

[0062] Please refer to Figure 1A and Figure 1B The display device 10 includes a substrate 100, a light-emitting element 110, and an optical film 130. In this embodiment, the display device 10 also includes a protective layer 120, an adhesive layer 140, and a cover plate 150.

[0063] The display device 10 has a front side FS and a back side BS opposite to the front side FS. A substrate 100 and a cover plate 150 are disposed opposite each other, with the substrate 100 located, for example, near the back side BS of the display device 10, and the cover plate 150 located, for example, near the front side FS of the display device 10. Light-emitting elements 110 are disposed on the substrate 100 and located between the substrate 100 and the cover plate 150. A protective layer 120 covers the light-emitting elements 110. An optical film 130 is disposed on the protective layer 120 and the plurality of light-emitting elements 110. An adhesive layer 140 is disposed between the cover plate 150 and the optical film 130 to bond the cover plate 150 and the optical film 130. The adhesive layer 140 can be optical adhesive or other suitable materials, and the invention is not limited thereto.

[0064] The cover plate 150 can be a transparent substrate, such as a glass substrate, a polymer substrate, or other suitable substrate. Materials for the polymer substrate include, for example, polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), or other suitable transparent polymer materials.

[0065] The substrate 100 may include a base 102 and a circuit structure 104. The base 102 may be a transparent substrate, such as a glass substrate, a polymer substrate, or other suitable substrate. The material of the base 102 may be similar to or the same as that of the cover plate 150, and this invention is not limited thereto. The circuit structure 104 is disposed on the base 102 and located between the base 102 and the light-emitting element 110. For example, the circuit structure 104 may include a plurality of driving circuit regions 104a and a plurality of wiring regions 104b. The plurality of driving circuit regions 104a may be arranged along a first direction D1 or a second direction D2 intersecting the first direction D1. In some embodiments, the first direction D1 may be perpendicular to the second direction D2, but this is not a limitation. Each driving circuit region 104a may include at least one driving element (e.g., a thin-film transistor, etc.) (not shown) and driving lines (not shown) to connect to and drive the corresponding light-emitting element 110. Figure 1A In this context, the driving circuit region 104a is rectangular in shape. However, it should be understood that the shape of the driving circuit region 104a is not limited to this; it can be adjusted to the required shape according to actual needs, such as a circle, trapezoid, or other arbitrary geometric shape. Furthermore, Figure 1B The driving circuit area 104a shown in the illustration is only schematically indicated in terms of its coverage, and its details (such as having multiple circuit layers and driving components) are omitted. The component layout and related wiring of the driving circuit area 104a can be designed according to actual needs, and the present invention is not limited thereto.

[0066] Multiple routing areas 104b are respectively connected to corresponding drive circuit areas 104a. The multiple routing areas 104b may include multiple first routing areas TL1 and multiple second routing areas TL2. The multiple first routing areas TL1 extend in a first direction D1 and are arranged along a second direction D2. The multiple second routing areas TL2 extend in the second direction D2 and are arranged along the first direction D1. Each of the multiple routing areas 104b may have one or more traces, and the material of the traces may be, for example, metal, but this invention is not limited thereto. In other words, a routing area 104b can be understood as the area where the traces are located, and the distribution of the routing areas 104b can be determined by the outline of the traces. The traces in the routing areas 104b can be used to transmit signals to the corresponding drive circuit areas 104a.

[0067] In some embodiments, the driving circuit region 104a and the wiring region 104b may enclose a plurality of transmittance regions R1 of the substrate 100, the average visible light transmittance of the transmittance regions R1 being 10% to 99%, while the driving circuit region 104a and the wiring region 104b have an average visible light transmittance of less than 10%. That is, the driving circuit region 104a and the wiring region 104b are non-transmittance regions R2 of the substrate 100 compared to the transmittance regions R1. The average visible light transmittance of the transmittance regions R1 can be adjusted according to the actual application, and the present invention is not limited thereto. For example, the average visible light transmittance of the transmittance regions R1 may be between 70% and 99% for automotive displays, but if applied to building window panes, the average visible light transmittance of the transmittance regions R1 may not be as high as that for automotive displays, for example, between 40% and 70% or other suitable ranges.

[0068] In some embodiments, the area ratio of the penetrating area R1 to the non-penetrating area R2 is between 2:8 and 8:2, so that the user can see the real scene on the other side of the display device 10 through the display device 10.

[0069] Light-emitting elements 110 are disposed on the driving circuit region 104a of the circuit structure 104 and connected to the corresponding driving lines. Specifically, each light-emitting element 110 overlaps with the corresponding driving circuit region 104a in the normal direction ND of the substrate 100. In some embodiments, the orthographic projection coverage of the light-emitting element 110 on the substrate 100 is smaller than the orthographic projection coverage of the driving circuit region 104a on the substrate 100, but the present invention is not limited thereto.

[0070] In some embodiments, the light-emitting element 110 may be a micro light-emitting diode, but the present invention is not limited thereto. The light-emitting element 110 may include a first light-emitting element 112, a second light-emitting element 114, and a third light-emitting element 116. The first light-emitting element 112 may emit first light having a first wavelength range, the second light-emitting element 114 may emit second light having a second wavelength range, and the third light-emitting element 116 may emit third light having a third wavelength range. For example, the first light emits light at 600nm, and its first wavelength range can be between 580nm and 620nm; the second light emits light at 550nm, and its second wavelength range can be between 530nm and 570nm; the third light emits light at 450nm, and its third wavelength range can be between 430nm and 470nm. That is to say, the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 can emit red light, green light, and blue light, respectively. However, the present invention is not limited thereto, and the wavelength range of the light emitted by the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 can be adjusted according to actual needs.

[0071] exist Figure 1A In this invention, the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 can constitute a pixel unit. The first light-emitting element 112 and the second light-emitting element 114 are arranged in the second direction D2, and the third light-emitting element 116 is located on one side of the second light-emitting element 114 and is arranged with the second light-emitting element 114 in the first direction D1. However, this invention is not limited thereto, and the arrangement of the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 can be adjusted according to actual needs.

[0072] In some embodiments, the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 each correspond to an independent driving circuit region 104a, but the present invention is not limited thereto. In other embodiments, the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 may be disposed on the same driving circuit region.

[0073] Figure 1A The diagram schematically illustrates an array of four pixel units arranged on the substrate 100, but this is not intended to limit the invention. The number and arrangement of the pixel units can be adjusted according to actual needs. Furthermore, the number, arrangement, wavelength range, and layout of the corresponding driving circuit area 104a of the light-emitting elements 110 in the pixel units can be adjusted according to actual needs, and the invention is not limited thereto.

[0074] The protective layer 120 may cover the top and sidewalls of multiple light-emitting elements 110 (i.e., the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116) and has a substantially flat surface to facilitate bonding with other film layers. The material of the protective layer 120 may be silicone, epoxy, optically clear adhesive, or other suitable materials.

[0075] The optical film 130 includes a first region Z11, a second region Z12, and a third region Z13. The first region Z11 includes a first cholesteric liquid crystal, which can reflect light in at least a first wavelength range. The second region Z12 includes a second cholesteric liquid crystal, which can reflect light in at least a second wavelength range. The third region Z13 includes a third cholesteric liquid crystal, which can reflect light in at least a third wavelength range. In this embodiment, the first, second, and third cholesteric liquid crystals are all in a planar state, and the optical film 130 does not have electrodes. That is, the first, second, and third cholesteric liquid crystals always maintain a planar state in the display device 10, allowing light in a specific wavelength range to be reflected.

[0076] The first region Z11, the second region Z12, and the third region Z13 of the optical film 130 are at least corresponding to the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116. For example, the first region Z11 overlaps with the first light-emitting element 112 in the normal direction ND of the substrate 100, the second region Z12 overlaps with the second light-emitting element 114 in the normal direction ND of the substrate 100, and the third region Z13 overlaps with the third light-emitting element 116 in the normal direction ND of the substrate 100. In this way, after the first light emitted by the first light-emitting element 112 passes through the first region Z11, part of the first light is reflected by the first region Z11, and the other part of the first light penetrates the first region Z11. After the second light emitted by the second light-emitting element 114 passes through the second region Z12, part of the second light is reflected by the second region Z12, and the other part of the second light penetrates the second region Z12. After the third light emitted by the third light-emitting element 116 passes through the third region Z13, part of the third light is reflected by the third region Z13, and the other part of the third light penetrates the third region Z13. In other words, the light-emitting elements 110 (e.g., the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116) can make light (e.g., the first light, the second light, and the third light) partially emitted from the front FS of the display device 10 and partially reflected to the back BS of the display device 10 through the corresponding areas (e.g., the first area Z11, the second area Z12, and the third area Z13) of the optical film 130, so that the same image can be displayed on both the front FS and the back BS of the display device 10 at the same time, thus realizing the effect of double-sided viewing of the display device 10.

[0077] In some embodiments, the driving circuit region 104a overlaps the first region Z11, the second region Z12, and the third region Z13 on the normal direction ND of the substrate 100. In some embodiments, the first region Z11, the second region Z12, and the third region Z13 overlap the penetrating region R1 and the non-penetrating region R2 on the normal direction ND of the substrate 100. That is, the orthographic projection coverage of the first region Z11, the second region Z12, and the third region Z13 on the substrate 100 is greater than the orthographic projection coverage of the driving circuit region 104a on the substrate 100.

[0078] In some embodiments, the first cholesteric liquid crystal has a reflectivity of 10% to 50% for the first light (or light within a first wavelength range) and a transmittance of 50% to 90%; the second cholesteric liquid crystal has a reflectivity of 10% to 50% for the second light (or light within a second wavelength range) and a transmittance of 50% to 90%; and the third cholesteric liquid crystal has a reflectivity of 10% to 50% for the third light (or light within a third wavelength range) and a transmittance of 50% to 90%.

[0079] In some embodiments, the projected area of ​​the first region Z11 on the substrate 100 is greater than the projected area of ​​the first light-emitting element 112 on the substrate 100, the projected area of ​​the second region Z12 on the substrate 100 is greater than the projected area of ​​the second light-emitting element 114 on the substrate 100, and the projected area of ​​the third region Z13 on the substrate 100 is greater than the projected area of ​​the third light-emitting element 116 on the substrate 100.

[0080] In this embodiment, the optical film 130 includes a first optical film 132, a second optical film 134, and a third optical film 136. The first optical film 132 defines a first region Z11, the second optical film 134 defines a second region Z12, and the third optical film 136 defines a third region Z13. That is, the first optical film 132 includes a first cholesteric liquid crystal capable of reflecting light at least in a first wavelength range, the second optical film 134 includes a second cholesteric liquid crystal capable of reflecting light at least in a second wavelength range, and the third optical film 136 includes a third cholesteric liquid crystal capable of reflecting light at least in a third wavelength range. Figure 1A Although the optical film 130 is shown to include three optical films (i.e., the first optical film 132, the second optical film 134 and the third optical film 136) and each optical film has a pattern on the entire surface, it is not intended to limit the present invention. The number of layers of the optical film 130 and the pattern of each optical film layer can be adjusted according to actual needs.

[0081] In some embodiments, the thickness of the first optical film 132 can be between 4.8 μm and 5.8 μm, the thickness of the second optical film 134 can be between 4.2 μm and 5.2 μm, and the thickness of the third optical film 136 can be between 2.7 μm and 4.1 μm. However, the present invention is not limited thereto, and the thicknesses of the first optical film 132, the second optical film 134, and the third optical film 136 can be adjusted according to actual needs depending on the characteristics of the liquid crystal material.

[0082] In this embodiment, the first optical film 132, the second optical film 134, and the third optical film 136 are stacked sequentially from bottom to top. However, the present invention does not limit their stacking order, which can be adjusted according to the chromaticity and brightness of the light-emitting element 110 and in accordance with actual needs. For example, if the brightness of the first light emitted by the first light-emitting element 112 is low, the first optical film 132 can be placed at the bottom layer of the optical film 130 (i.e., the layer closest to the light-emitting element 110 in the optical film 130), so that the first light incident on the first optical film 132 does not need to pass through the second optical film 134 and the third optical film 136, and the part of the first light reflected by the first optical film 132 will not pass through the second optical film 134 and the third optical film 136, so that the reflected part of the first light has the desired brightness. Conversely, if the brightness of the first light emitted by the first light-emitting element 112 is high, the first optical film 132 can be disposed on the top layer of the optical film 130 (i.e., the layer furthest from the light-emitting element 110 in the optical film 130). This allows the first light incident on the first optical film 132 to pass through the second optical film 134 and the third optical film 136, and the portion of the first light reflected by the first optical film 132 also passes through the second optical film 134 and the third optical film 136, so that the reflected portion of the first light has the desired brightness. In other words, the display device 10 can achieve the desired display effect by adjusting the stacking order of the first optical film 132, the second optical film 134, and the third optical film 136 in the optical film 130.

[0083] In some embodiments, the first optical film 132 and the second optical film 134 may be connected by an adhesive layer (not shown), and the second optical film 134 and the third optical film 136 may be connected by an adhesive layer (not shown), but the present invention is not limited thereto.

[0084] Figure 2A This is a layered schematic diagram of a display device according to another embodiment of the present invention. Figure 2B This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention. Figure 2B It can be along Figure 2A A cross-sectional view of one embodiment along section line B-B'. For clarity, Figure 2A Some components are omitted from the drawing; please refer to the reference for the omitted parts. Figure 2B Please understand this. It must be noted here that... Figures 2A to 2B The embodiments follow Figures 1A to 1B The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0085] Please refer to Figure 2A and Figure 2BThe main difference between the display panel 20 and the display panel 10 in this embodiment is that the display panel 20 includes a substrate 100, a protective layer 120, an optical film 230, an adhesive layer 140, and a cover plate 150. The substrate 100, protective layer 120, adhesive layer 140, and cover plate 150 are similar to those in the above embodiments and will not be described in detail here.

[0086] The optical film 230 includes a first region Z21 and a second region Z22. The first region Z21 includes a first cholesteric liquid crystal, which reflects light in at least a first wavelength range and a second wavelength range. The second region Z22 includes a second cholesteric liquid crystal, which reflects light in at least a second wavelength range and a third wavelength range. For example, the first cholesteric liquid crystal primarily reflects light with wavelengths between 550 nm and 600 nm, and the second cholesteric liquid crystal primarily reflects light with wavelengths between 450 nm and 550 nm, but the invention is not limited thereto.

[0087] In this embodiment, both the first and second cholesteric liquid crystals are planar, and the optical film 230 has no electrodes. This means that the first and second cholesteric liquid crystals maintain a planar state within the display device 20, allowing light within a specific wavelength range to be reflected. Thus, when the first light emitted by the first light-emitting element 112 passes through the first region Z21, a portion of the first light is reflected by the first region Z21, while the other portion penetrates the first region Z21. Similarly, when the second light emitted by the second light-emitting element 114 passes through either the first region Z21 or the second region Z22, a portion of the second light is reflected by the first region Z21 or the second region Z22, while the other portion penetrates the first region Z21 or the second region Z22. Likewise, when the third light emitted by the third light-emitting element 116 passes through the second region Z22, a portion of the third light is reflected by the second region Z22, while the other portion penetrates the second region Z22. In other words, the light-emitting elements 110 (e.g., the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116) can make light (e.g., the first light, the second light, and the third light) partially emitted from the front FS of the display device 20 and partially reflected to the back BS of the display device 20 through the corresponding areas (e.g., the first area Z21 and the second area Z22) of the optical film 230, so that the same image can be displayed on both the front FS and the back BS of the display device 20 at the same time, thus realizing the effect of double-sided viewing of the display device 20.

[0088] In some embodiments, the first cholesteric liquid crystal has a reflectivity of 10% to 50% for the first light and the second light (or light in the first wavelength range and the second wavelength range) and a transmittance of 50% to 90%; the second cholesteric liquid crystal has a reflectivity of 10% to 50% for the second light and the third light (or light in the second wavelength range and the third wavelength range) and a transmittance of 50% to 90%.

[0089] The first region Z21 and the second region Z22 of the optical film 230 are at least corresponding to the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116. For example, the first region Z21 overlaps the first light-emitting element 112 and the second light-emitting element 114 in the normal direction ND of the substrate 100, and the second region Z22 overlaps the second light-emitting element 114 and the third light-emitting element 116 in the normal direction ND of the substrate 100.

[0090] In some embodiments, the driving circuit region 104a overlaps the first region Z21 or the second region Z22 on the normal direction ND of the substrate 100. In some embodiments, the orthographic projection coverage of the first region Z21 or the orthographic projection coverage of the second region Z22 of the optical film 230 on the substrate 100 is greater than the orthographic projection coverage of the corresponding driving circuit region 104a on the substrate 100, so that the light from the light-emitting element 110 reflected by the first region Z21 and the second region Z22 to the back surface BS of the display device 20 has good brightness, thereby improving the display effect of the back surface BS of the display device 20.

[0091] In some embodiments, the projected area of ​​the first region Z21 on the substrate 100 is greater than the sum of the projected areas of the first light-emitting element 112 and the second light-emitting element 114 on the substrate 100, and the projected area of ​​the second region Z22 on the substrate 100 is greater than the sum of the projected areas of the second light-emitting element 114 and the third light-emitting element 116 on the substrate 100.

[0092] In some embodiments, the optical film 230 includes a stacked first optical film 232 and a second optical film 234. The first optical film 232 includes a plurality of first pattern portions 232a and a plurality of first isolation portions 232b. The plurality of first pattern portions 232a and the plurality of first isolation portions 232b are staggered in a second direction D2, such that the first isolation portions 232b separate the plurality of first pattern portions 232a. The first pattern portions 232a extend in a first direction D1 and overlap with the second light-emitting element 114 and the third light-emitting element 116 in the normal direction ND of the substrate 100. The first isolation portions 232b overlap with the first light-emitting element 112 in the normal direction ND of the substrate 100, but do not overlap with the second light-emitting element 114 and the third light-emitting element 116. The first pattern portions 232a include a second cholesteric liquid crystal, that is, the first pattern portions 232a can define a second region Z22 of the optical film 230. The second optical film 234 includes a plurality of second pattern portions 234a and a plurality of second isolation portions 234b. Multiple second pattern portions 234a and multiple second isolation portions 234b are staggered in the first direction D1, such that the second isolation portions 234b separate the multiple second pattern portions 234a. The second pattern portions 234a extend in the second direction D2 and overlap the first light-emitting element 112 and the second light-emitting element 114 in the normal direction ND of the substrate 100. The second isolation portions 234b overlap with the third light-emitting element 116 in the normal direction ND of the substrate 100, but do not overlap with the second light-emitting element 114 and the first light-emitting element 112. The second pattern portions 234a include a first cholesteric liquid crystal, that is, the second pattern portions 234a can define the first region Z21 of the optical film 230. The materials of the first isolation portions 232b and the second isolation portions 234b can be photosensitive gap materials, spherical gap materials, or other suitable gap materials; the present invention is not limited thereto.

[0093] Figure 2A and Figure 2B Although the first optical film 232 and the second optical film 234 are illustrated as patterned optical films, this is not intended to limit the invention. In other embodiments, the first optical film 232 and the second optical film 234 may also be similar to... Figures 1A to 1B The embodiment has a full-surface pattern. Furthermore, the stacking order of the first optical film 232 and the second optical film 234 can be as follows: Figures 1A to 1B The embodiments described herein are adjusted according to the chromaticity and brightness of the light-emitting element 110 and in accordance with actual needs, but the present invention is not limited thereto.

[0094] Figure 3A This is a layered schematic diagram of a display device according to another embodiment of the present invention. Figure 3B This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention. Figure 3BIt can be along Figure 3A A cross-sectional view of one embodiment of the section line C-C'. Figure 4 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention. Figure 4 It can be Figure 3B A magnified view of a portion of the image. For clarity, Figure 3A and Figure 4 Some components are omitted from the drawing; please refer to the reference for the omitted parts. Figure 3B Please understand this. It must be noted here that... Figures 3A to 3B and Figure 4 The embodiments follow Figures 1A to 1B The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0095] Please refer to Figure 3A and Figure 3B The main difference between the display panel 30 and the display panel 10 in this embodiment is that the display panel 30 includes a substrate 300, a protective layer 120, an optical film 330, an adhesive layer 140, and a cover plate 150. The protective layer 120, the adhesive layer 140, and the cover plate 150 are similar to those in the above embodiments and will not be described in detail here.

[0096] The substrate 300 includes a base 302 and a circuit structure 304. The material of the base 302 can be similar to that of the base 102. The circuit structure 304 is disposed on the base 302. For example, the circuit structure 304 may include multiple driving circuit regions 304a and multiple wiring regions 304b. The multiple driving circuit regions 304a may be arranged in multiple rows along a first direction D1 or a second direction D2, with adjacent rows of driving circuit regions 304a interleaved. Each driving circuit region 304a may include a driving element (e.g., a thin-film transistor, etc.) (not shown) and driving lines (not shown) to connect to and drive the corresponding light-emitting element 110. Figure 3A In this invention, the driving circuit area 304a is rectangular in shape, but this invention is not limited thereto. The shape of the driving circuit area 304a can be adjusted to the required shape according to actual needs.

[0097] Multiple routing areas 304b are respectively connected to corresponding drive circuit areas 304a. The multiple routing areas 304b may include multiple first routing areas TL1' and multiple second routing areas TL2'. The multiple first routing areas TL1' extend in a first direction D1 and are arranged along a second direction D2. The multiple second routing areas TL2' extend in the second direction D2 and are arranged along the first direction D1. Each of the multiple routing areas 304b may have one or more traces, and the material of the traces may be, for example, metal, but this invention is not limited thereto. In other words, a routing area 304b can be understood as the area where the traces are located, and the distribution of the routing areas 304b can be determined by the outline of the traces. The traces in the routing areas 304b can be used to transmit signals to the corresponding drive circuit area 304a.

[0098] In some embodiments, the driving circuit region 304a and the wiring region 304b may enclose a plurality of transparent regions R1' of the substrate 300. The average visible light transmittance of the transparent regions R1' is 10% to 99%, while the driving circuit region 304a and the wiring region 304b have an average visible light transmittance of less than 10%. That is, the driving circuit region 304a and the wiring region 304b are non-transparent regions R2' of the substrate 300 compared to the transparent regions R1'. In some embodiments, the area ratio of the transparent region R1' to the non-transparent region R2' is between 2:8 and 8:2, so that the user can see the real scene on the other side of the display device 30 through the display device 30.

[0099] The light-emitting element 110 may include a first light-emitting element 112, a second light-emitting element 114, and a third light-emitting element 116, which are respectively disposed on corresponding driving circuit regions 304a and connected to corresponding driving lines. The first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 may constitute a pixel unit. In a pixel unit, the first light-emitting element 112 and the third light-emitting element 116 are arranged in the second direction D2, and the second light-emitting element 114 is located on one side of the first light-emitting element 112 and the third light-emitting element 116, and is staggered with the first light-emitting element 112 and the third light-emitting element 116. In some embodiments, the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116 each correspond to an independent driving circuit region 304a. However, the present invention is not limited thereto, and the number, arrangement, and wavelength range of the light-emitting elements 110 in the pixel unit can be adjusted according to actual needs.

[0100] The optical film 330 includes a first region Z31, a second region Z32, and a third region Z33. The first region Z31 includes a first cholesteric liquid crystal, which can reflect light in at least a first wavelength range. The second region Z32 includes a second cholesteric liquid crystal, which can reflect light in at least a second wavelength range. The third region Z33 includes a third cholesteric liquid crystal, which can reflect light in at least a third wavelength range. In this embodiment, the first, second, and third cholesteric liquid crystals are all in a planar state, and the optical film 330 does not have electrodes. That is, the first, second, and third cholesteric liquid crystals always maintain a planar state in the display device 30, thus enabling the reflection of light in a specific wavelength range.

[0101] The first region Z31, the second region Z32, and the third region Z33 of the optical film 330 are at least corresponding to the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116. For example, the first region Z31 overlaps with the first light-emitting element 112 in the normal direction ND of the substrate 300, the second region Z32 overlaps with the second light-emitting element 114 in the normal direction ND of the substrate 300, and the third region Z33 overlaps with the third light-emitting element 116 in the normal direction ND of the substrate 300. In this way, after the first light emitted by the first light-emitting element 112 passes through the first region Z31, part of the first light is reflected by the first region Z31, and the other part of the first light penetrates the first region Z31. After the second light emitted by the second light-emitting element 114 passes through the second region Z32, part of the second light is reflected by the second region Z32, and the other part of the second light penetrates the second region Z32. After the third light emitted by the third light-emitting element 116 passes through the third region Z33, part of the third light is reflected by the third region Z33, and the other part of the third light penetrates the third region Z33. In other words, the light-emitting elements 110 (e.g., the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116) can make light (e.g., the first light, the second light, and the third light) partially emitted from the front FS of the display device 30 and partially reflected to the back BS of the display device 30 through the corresponding areas (e.g., the first area Z31, the second area Z32, and the third area Z33) of the optical film 330, so that the same image can be displayed on both the front FS and the back BS of the display device 30 at the same time, thus realizing the effect of double-sided viewing of the display device 30.

[0102] In some embodiments, the projected area of ​​the first region Z31 on the substrate 300 is greater than the projected area of ​​the first light-emitting element 112 on the substrate 300, the projected area of ​​the second region Z32 on the substrate 300 is greater than the projected area of ​​the second light-emitting element 114 on the substrate 300, and the projected area of ​​the third region Z33 on the substrate 300 is greater than the projected area of ​​the third light-emitting element 116 on the substrate 300.

[0103] In this embodiment, the optical film 330 is a single patterned optical film, meaning that the first region Z31, the second region Z32, and the third region Z33 are located on the same film layer. Furthermore, the first region Z31, the second region Z32, and the third region Z33 are separated from each other by a spacer 332 (e.g., a photosensitive gap material, a spherical spacer, or other suitable gap material). In some embodiments, the spacer 332 overlaps the transmittance region R1' of the substrate 300 in the normal direction ND of the substrate 300, which can increase the transmittance of the display device 30 to visible light and improve the transparency of the display device 30.

[0104] In some embodiments, the widths of each of the first region Z31, the second region Z32, and the third region Z33 may be greater than the width of the corresponding driving circuit region 304a. Taking the first region Z31 as an example, as... Figure 4 As shown, because the first light-emitting element 112 has a light-emitting angle, the first light emitted by it can form different incident angles with the top surface of the first region Z31. In the first light, when its incident angle is less than tan... -1 When (d1 / (h1+h2)), the reflected light from the first region Z31 is easily blocked by the driving circuit region 304a, making it difficult for the light to reach the back surface BS of the display device 30; in the first light, when its incident angle is greater than tan -1 When (d1 / (h1+h2)), the reflected light from the first region Z31 will not be blocked by the driving circuit region 304a and can be emitted to the back surface BS of the display device 30. Here, d1 is the distance between the center of the first light-emitting element 112 and one edge of the driving circuit region 304a, h1 is the distance from the top surface of the first light-emitting element 112 to the top surface of its corresponding first region Z31, and h2 is the distance from the top surface of the driving circuit region 304a to the top surface of its corresponding first region Z31. For example, the first light may include a first incident light L1 and a second incident light L2. The angle of incidence between the first incident light L1 and the top surface of the first region Z31 is θ1, and the angle of incidence between the second incident light L2 and the top surface of the first region Z31 is θ2. For ease of explanation, the first incident light L1 and the second incident light L2 are emitted from the center of the first light-emitting element 112, and refraction through different film layers is not considered. Since the incident angle θ1 of the first incident light L1 is less than tan -1 (d1 / (h1+h2)), the first incident light L1, reflected by the first region Z31, is easily blocked by the driving circuit region 304a, and is not easily emitted to the back surface BS of the display device 30. On the other hand, since the incident angle θ2 of the second incident light L1 is greater than tan... -1(d1 / (h1+h2)), the second incident light L2 reflected by the first region Z31 will not be blocked by the driving circuit region 304a, and can be emitted to the back BS of the display device 30.

[0105] Therefore, it can be seen that the center of the first light-emitting element 112 is adjacent to one side of the first region Z31 (e.g., is...). Figure 4 The distance d2 between the left edge of the first light-emitting element 112 and the corresponding edge of the first light-emitting element 112 must be at least greater than (t+h1)×d1 / (h1+h2) to ensure that both the incident and reflected light of the first light pass through the first region Z31 without being blocked by the driving circuit region 304a. Here, t is the thickness of the first region Z31, h1 is the distance from the top surface of the first light-emitting element 112 to the top surface of the corresponding first region Z31, d1 is the distance between the center of the first light-emitting element 112 and the edge of the driving circuit region 304a corresponding to one side of the first region Z31, and h2 is the distance from the top surface of the driving circuit region 304a to the top surface of the corresponding first region Z31. Preferably, the distance d2 between the center of the first light-emitting element 112 and the edge of the first region Z31 (e.g., the left edge of the first region Z31) is greater than (t+h1)×d1 / (h1+h2) to ensure that both the incident and reflected light of the first light pass through the first region Z31 without being blocked by the driving circuit region 304a. Figure 4 The distance d2 between the left edge of the first light-emitting element 112 and the edge d1 between the center of the first light-emitting element 112 and the edge of the driving circuit area 304a corresponding to the first region Z31 ensures that the reflected light from the first light-emitting element 112 can be emitted from the left side of the first light-emitting element 112. Overall, the width W2 of the first region Z31 is greater than the width W1 of the corresponding driving circuit area 304a, ensuring that the reflected light from the first light-emitting element 112 can be effectively emitted to the back surface BS of the display device 30. The aforementioned dimensional relationship between the first region Z31 and the corresponding driving circuit area 304a also applies to other patterned areas in the optical film, and is not limited to this embodiment, but also applicable to other embodiments described above or below.

[0106] In some embodiments, the driving circuit region 304a overlaps the first region Z31, the second region Z32, or the third region Z33 on the normal direction ND of the substrate 300.

[0107] In some embodiments, the orthographic projection coverage of the first region Z31, the second region Z32, and the third region Z33 on the substrate 300 is at least greater than the orthographic projection coverage of their corresponding driving circuit region 304a on the substrate 300, so that the light from the light-emitting element 110 reflected by the first region Z31, the second region Z32, and the third region Z33 to the back surface BS of the display device 30 has good brightness, thereby improving the display effect of the back surface BS of the display device 30.

[0108] Figure 5A This is a layered schematic diagram of a display device according to another embodiment of the present invention. Figure 5BThis is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention. Figure 5B It can be along Figure 5A A cross-sectional view of one embodiment along section line D-D'. For clarity, Figure 5A Some components are omitted from the drawing; please refer to the reference for the omitted parts. Figure 5B Please understand this. It must be noted here that... Figures 5A to 5B The embodiments follow Figures 3A to 3B The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0109] Please refer to Figure 5A and Figure 5B The main difference between the display panel 40 and the display panel 30 in this embodiment is that the display panel 40 includes a substrate 300, a protective layer 120, an optical film 430, an adhesive layer 140, and a cover plate 150. The substrate 300, protective layer 120, adhesive layer 140, and cover plate 150 are similar to those in the above embodiments and will not be described in detail here.

[0110] The optical film 430 includes a first region Z41, a second region Z42, and a third region Z43. The first region Z41 includes a first cholesteric liquid crystal, which can reflect light in at least a first wavelength range. The second region Z42 includes a second cholesteric liquid crystal, which can reflect light in at least a second wavelength range. The third region Z43 includes a third cholesteric liquid crystal, which can reflect light in at least a third wavelength range. In this embodiment, the first, second, and third cholesteric liquid crystals are all in a planar state, and the optical film 430 does not have electrodes. That is, the first, second, and third cholesteric liquid crystals always maintain a planar state in the display device 40, thus enabling the reflection of light in a specific wavelength range.

[0111] The first region Z41, the second region Z42, and the third region Z43 of the optical film 430 are at least corresponding to the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116. For example, the first region Z41 overlaps with the first light-emitting element 112 in the normal direction ND of the substrate 300, the second region Z42 overlaps with the second light-emitting element 114 in the normal direction ND of the substrate 300, and the third region Z43 overlaps with the third light-emitting element 116 in the normal direction ND of the substrate 300. In this way, after the first light emitted by the first light-emitting element 112 passes through the first region Z41, part of the first light is reflected by the first region Z41, and the other part of the first light penetrates the first region Z41. After the second light emitted by the second light-emitting element 114 passes through the second region Z42, part of the second light is reflected by the second region Z42, and the other part of the second light penetrates the second region Z42. After the third light emitted by the third light-emitting element 116 passes through the third region Z43, part of the third light is reflected by the third region Z43, and the other part of the third light penetrates the third region Z43. In other words, the light-emitting elements 110 (e.g., the first light-emitting element 112, the second light-emitting element 114, and the third light-emitting element 116) can make light (e.g., the first light, the second light, and the third light) partially emitted from the front FS of the display device 40 and partially reflected to the back BS of the display device 40 through the corresponding areas (e.g., the first area Z41, the second area Z42, and the third area Z43) of the optical film 430, so that the same image can be displayed on both the front FS and the back BS of the display device 40 at the same time, thus realizing the effect of double-sided viewing of the display device 40.

[0112] In some embodiments, the projected area of ​​the first region Z41 on the substrate 300 is greater than the projected area of ​​the first light-emitting element 112 on the substrate 300, the projected area of ​​the second region Z42 on the substrate 300 is greater than the projected area of ​​the second light-emitting element 114 on the substrate 300, and the projected area of ​​the third region Z43 on the substrate 300 is greater than the projected area of ​​the third light-emitting element 116 on the substrate 300.

[0113] In some embodiments, the driving circuit region 304a overlaps the first region Z41, the second region Z42, or the third region Z43 on the normal direction ND of the substrate 300.

[0114] In some embodiments, the orthographic projection coverage of the first region Z41, the second region Z42, and the third region Z43 on the substrate 300 is at least greater than the orthographic projection coverage of their corresponding driving circuit region 304a on the substrate 300, so that the light from the light-emitting element 110 reflected by the first region Z41, the second region Z42, and the third region Z43 to the back surface BS of the display device 40 has good brightness, thereby improving the display effect of the back surface BS of the display device 40.

[0115] In this embodiment, the optical film 430 includes a stacked first optical film 432, a second optical film 434, and a third optical film 436. The first optical film 432 includes a plurality of first pattern portions 432a and a plurality of first isolation portions 432b. The plurality of first pattern portions 432a and the plurality of first isolation portions 432b are staggered in a second direction D2, such that the first isolation portions 432b separate the plurality of first pattern portions 432a. The first pattern portions 432a extend in a first direction D1 and overlap with the first light-emitting element 112 in the normal direction ND of the substrate 300. The first isolation portions 432b overlap with the second light-emitting element 114 and the third light-emitting element 116 in the normal direction ND of the substrate 100, but do not overlap with the first light-emitting element 112. The first pattern portions 432a include a first cholesteric liquid crystal, that is, the first pattern portions 432a can define a first region Z41 of the optical film 430. The second optical film 434 includes a plurality of second pattern portions 434a and a plurality of second isolation portions 434b. Multiple second pattern portions 434a and multiple second isolation portions 434b are staggered in the second direction D2, such that the second isolation portions 434b separate the multiple second pattern portions 434a. The second pattern portions 434a extend in the first direction D1 and overlap the second light-emitting element 114 in the normal direction ND of the substrate 300. The second isolation portions 434b overlap with the first light-emitting element 112 and the third light-emitting element 116 in the normal direction ND of the substrate 100, but do not overlap with the second light-emitting element 114. The second pattern portions 434a include second cholesteric liquid crystal, that is, the second pattern portions 434a can define the second region Z42 of the optical film 430. The third optical film 436 includes multiple third pattern portions 436a and multiple third isolation portions 436b. The multiple third pattern portions 436a and multiple third isolation portions 436b are staggered in the second direction D2, such that the third isolation portions 436b separate the multiple third pattern portions 436a. The third patterned portion 436a extends in the first direction D1 and overlaps the third light-emitting element 116 in the normal direction ND of the substrate 300. The third isolation portion 436b overlaps with the first light-emitting element 112 and the second light-emitting element 114 in the normal direction ND of the substrate 100, but does not overlap with the third light-emitting element 116. The third patterned portion 436a includes a third cholesteric liquid crystal, that is, the third patterned portion 436a can define the third region Z43 of the optical film 430. The materials of the first isolation portion 432b, the second isolation portion 434b and the third isolation portion 436b can be photosensitive gap materials, spherical gap materials or other suitable gap materials, and the present invention is not limited thereto.

[0116] In some embodiments, the first pattern portion 432a, the second pattern portion 434a, and the third pattern portion 436a do not overlap with each other in the normal direction ND of the substrate 300.

[0117] Figure 5A and Figure 5B Although the optical film 430 is illustrated as comprising three optical films (i.e., a first optical film 432, a second optical film 434, and a third optical film 436) and each optical film is a patterned optical film, this is not intended to limit the invention. The number of layers in the optical film 430 and the pattern of each optical film layer can be adjusted according to actual needs. Furthermore, the stacking order of the first optical film 432, the second optical film 434, and the third optical film 436 can be adjusted according to actual needs, and the invention is not limited thereto.

[0118] In summary, the display device of the present invention includes an optical film disposed on a light-emitting element. The optical film includes a first region and a second region. The first region includes a first cholesteric liquid crystal that reflects at least a first wavelength range, and the second region includes a second cholesteric liquid crystal that reflects at least a second wavelength range. This allows light emitted by the light-emitting element to partially penetrate through the corresponding region of the optical film and reach the front of the display device, while the other part is reflected to the back of the display device. This enables the same image to be displayed on both the front and back of the display device, and both have good display effects.

Claims

1. A display device, comprising: substrate; A first light-emitting element and a second light-emitting element are disposed on the substrate, wherein the first light-emitting element emits first light having a first wavelength range, and the second light-emitting element emits second light having a second wavelength range; An optical film is disposed on the first light-emitting element and the second light-emitting element, wherein the optical film includes a first region and a second region, the first region includes a first cholesteric liquid crystal that reflects light in at least a first wavelength range, and the second region includes a second cholesteric liquid crystal that reflects light in at least a second wavelength range. When the first light beam passes through the first region, a portion of the first light beam is reflected by the first region, while the other portion of the first light beam penetrates the first region. After the second light passes through the second region, part of the second light is reflected by the second region, and the other part of the second light penetrates the second region.

2. The display device as claimed in claim 1, wherein the first cholesteric liquid crystal and the second cholesteric liquid crystal are planar.

3. The display device of claim 1, wherein the substrate has a non-transparent area and a transparent area, and the area ratio of the transparent area to the non-transparent area is between 2:8 and 8:

2.

4. The display device of claim 1, wherein the first region and the second region are located in the same film layer and are separated from each other.

5. The display device of claim 1, wherein the first region overlaps the first light-emitting element in the normal direction of the substrate, and the second region overlaps the second light-emitting element in the normal direction of the substrate.

6. The display device of claim 1, wherein the first cholesteric liquid crystal has a reflectivity of 10% to 50% for the first light, and the second cholesteric liquid crystal has a reflectivity of 10% to 50% for the second light.

7. The display device of claim 1, wherein the optical film comprises a stacked first optical film and a second optical film, at least a portion of the first optical film defining the first region, and at least a portion of the second optical film defining the second region.

8. The display device of claim 7, wherein the first optical film includes a patterned portion corresponding to the first light-emitting element and an isolation portion that does not overlap with the first light-emitting element, the patterned portion defining the first region.

9. The display device as claimed in claim 1, further comprising: A third light-emitting element is disposed on the substrate, wherein the third light-emitting element emits a third light having a third wavelength range.

10. The display device of claim 9, wherein the optical film further comprises a third region overlapping the third light-emitting element in the normal direction of the substrate, wherein the third region comprises a third cholesteric liquid crystal that reflects light in at least the third wavelength range.

11. The display device of claim 9, wherein the first cholesteric liquid crystal reflects light in the first wavelength range and the second wavelength range, and the second cholesteric liquid crystal reflects light in the second wavelength range and the third wavelength range.

12. The display device of claim 11, wherein the first region overlaps the first light-emitting element and the second light-emitting element in the normal direction of the substrate, and the second region overlaps the second light-emitting element and the third light-emitting element in the normal direction of the substrate.

13. The display device of claim 5, wherein the projected area of ​​the first region on the substrate is greater than the projected area of ​​the first light-emitting element on the substrate, and the projected area of ​​the second region on the substrate is greater than the projected area of ​​the second light-emitting element on the substrate.

14. The display device of claim 1, wherein the substrate includes a circuit structure having a driving circuit region, the first light-emitting element being located on the driving circuit region and correspondingly connected to the circuit structure, the driving circuit region overlapping the first region in the normal direction of the substrate.

15. The display device of claim 14, wherein the width of the first region is greater than the width of the driving circuit region.

16. The display device of claim 14, wherein the angle of incidence of the first light onto the first region is greater than tan θ. -1 (d1 / (h1+h2)), where d1 is the distance between the center of the first light-emitting element and the side edge of the driving circuit area, h1 is the distance from the top surface of the first light-emitting element to the top surface of the corresponding first area, and h2 is the distance from the top surface of the driving circuit area to the top surface of the corresponding first area.

17. The display device of claim 14, wherein the distance between the center of the first light-emitting element and the side edge of the first region is at least greater than (t+h1)×d1 / (h1+h2), where t is the thickness of the first region, d1 is the distance between the center of the first light-emitting element and the side edge of the driving circuit region corresponding to the first region, h1 is the distance from the top surface of the first light-emitting element to the top surface of the corresponding first region, and h2 is the distance from the top surface of the driving circuit region to the top surface of the corresponding first region.

Images