Display devices

Abstract

This invention provides a display device comprising a plurality of light-emitting units and a first dimming structure, wherein the first dimming structure is disposed on the light-emitting units. When a first number of light-emitting units is activated, the display device provides a first viewing angle relative to the first number of light-emitting units; when a second number of light-emitting units is activated, the display device provides a second viewing angle relative to the second number of light-emitting units. The first number is less than the second number, and the first viewing angle is less than the second viewing angle.

Description

[0001] This application is a divisional application of the invention patent application filed on May 20, 2019, with application number 201910419709.8 and title "Display Device". Technical Field

[0002] This invention relates to a display device (light-emitting device), and more particularly to a display device (light-emitting device) with controllable viewing angle. Background Technology

[0003] With the development of electronic devices, they have become indispensable items in modern society. For example, display devices, as electronic devices, are characterized by their slim and lightweight design, low power consumption, and lack of radiation pollution. Therefore, they are widely used in televisions, monitors, notebooks, smartphones, watches, and automotive displays to provide more convenient information transmission and display. However, as users increasingly value privacy when viewing display devices, there is a need to improve the privacy features of these devices. Summary of the Invention

[0004] In one embodiment, the present invention provides a display device including a plurality of light-emitting units and a first dimming structure, wherein the first dimming structure is disposed on the light-emitting units. When a first number of light-emitting units is turned on, the light-emitting device provides a first viewing angle relative to the first number of light-emitting units; when a second number of light-emitting units is turned on, the light-emitting device provides a second viewing angle relative to the second number of light-emitting units. The first number is less than the second number, and the first viewing angle is less than the second viewing angle. Attached Figure Description

[0005] Figure 1 The figure shown is a cross-sectional schematic diagram of a display device according to the first embodiment of the present invention.

[0006] Figure 2 The diagram shown is a dimming structure of a display device according to a first embodiment of the present invention and a view control diagram of the corresponding light-emitting unit.

[0007] Figure 3 The diagram shown is a schematic diagram of multiple dimming structures and their corresponding light-emitting units for viewing angle control according to the first embodiment of the present invention.

[0008] Figure 4 The diagram shown is a schematic diagram of the viewing angle control of the display device according to the first embodiment of the present invention.

[0009] Figure 5 The diagram shown is a cross-sectional view of a display device according to a second embodiment of the present invention.

[0010] Figure 6 The diagram shown is a schematic diagram of the viewing angle control of a display device according to a second embodiment of the present invention.

[0011] Figure 7 The figure shown is a cross-sectional schematic diagram of a display device according to a third embodiment of the present invention.

[0012] Figure 8 The diagram shown is a schematic diagram of the viewing angle control of a display device according to a third embodiment of the present invention.

[0013] Figure 9 The figure shown is a cross-sectional schematic diagram of a display device according to the fourth embodiment of the present invention.

[0014] Figure 10 The diagram shown is a schematic diagram of the display area according to the fifth embodiment of the present invention.

[0015] Figure 11 The figure shown is a cross-sectional schematic diagram of a display device according to the fifth embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 100-Emitting layer; 100a-Emitting area; 110-Backlight; 120-Dimming panel; 122-First dimming substrate; 122a-First surface; 122b-Second surface; 124-Second dimming substrate; 124a, 124b-Surfaces; 126-Dimming dielectric layer; 128-Dimming shielding layer; 128a-Aperture unit; 128a_1-First aperture unit; 128a_2-Second aperture unit; 128a_3-Third aperture unit; 130-Dimming circuit layer; 132-First conductive layer; 134-First... Insulating layer; 136-First semiconductor layer; 142-Second conductive layer; 144-Second insulating layer; 152-Third conductive layer; 180-Barrier layer; 182-Encapsulation layer; 190-Barrier; 200-Dimming layer; 210-Dimming structure; 210a-Opening; 210b-Light shielding portion; 250-Buffer layer; 300-Display layer; 300a-Display area; 300a_1-First sub-display area; 300a_2-Second sub-display area; 300b-Peripheral area; 302-First display substrate; 304-Second display substrate; 306-Display medium Layers; 308 - Display light-shielding layer; 308a - Sub-pixel aperture; 309 - Light color conversion layer; 310 - Display circuit layer; 312 - Fourth conductive layer; 314 - Third insulating layer; 316 - Second semiconductor layer; 322 - Fifth conductive layer; 324 - Fourth insulating layer; 332 - Sixth conductive layer; AE - Light switch structure; AE1 - First light switch structure; AE2 - Second light switch structure; AE3 - Third light switch structure; AME, DME - Control electrodes; ASW - Dimming switch element; A_1, A_2 - Viewing area; BEF - Prism sheet; DF - Diffuser sheet; DSW - Display switch element; E1 - First electrode; E2 - Second electrode; ED - Display device; FA - Frame adhesive; FO - Focal point; LD - Light-emitting element; LE - Light-emitting unit; LE1 - First light-emitting unit; LE2 - Second light-emitting unit; LE3 - Third light-emitting unit; LS - Light-emitting part; PL - Polarizing film; P_1, P_2, P_3, P_4 - Position; SP - Sub-pixel; VA1 - First viewing angle; VA2 - Second viewing angle; VA3 - Third viewing angle; X, Y, Z - Direction; θ1, θ2, θ3 - Angle. Detailed Implementation

[0017] The present invention can be understood by referring to the following detailed description and the accompanying drawings. It should be noted that, for ease of understanding and to keep the drawings concise, many of the drawings in this invention only depict a portion of the display device, and specific elements in the drawings are not drawn to scale. Furthermore, the number and size of each element in the drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] Throughout this specification and the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same elements. This document is not intended to distinguish between elements that have the same function but different names. In the following specification and claims, words such as "comprising," "containing," and "having" are open-ended terms and should therefore be interpreted as "containing but not limited to...". Thus, when the terms "comprising," "containing," and / or "having" are used in the description of this invention, they specify the presence of the corresponding feature, area, step, operation, and / or component, but do not exclude the presence of one or more of the corresponding feature, area, step, operation, and / or component.

[0019] When a component, such as a membrane or region, is referred to as "on another component (or a variant thereof)," it can be directly on another component, or there may be other components between them. On the other hand, when a component is referred to as "directly on another component (or a variant thereof)," there are no components between them.

[0020] It should be understood that when a component or membrane is referred to as being "connected to" another component or membrane, it can be directly connected to this other component or membrane, or there can be an intercalated component or membrane between them. Conversely, when a component is referred to as being "directly connected to" another component or membrane, there is no intercalated component or membrane between them. Additionally, when a component is referred to as being "coupled to another component (or a variant thereof)," it can be directly connected to this other component, or indirectly connected (e.g., electrically connected) to this other component through one or more components.

[0021] The terms “approximately,” “substantially,” “roughly,” “equal to,” or “equivalent to” are generally interpreted as being within 20% of a given value or range, or as being within 10%, 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0022] While terms such as "first," "second," and "third" may be used to describe or name different components, these components are not limited to these terms. These terms are used only to distinguish one component from other components in the specification and are not related to the manufacturing order of these components. The same terms may not be used in the claims and may be replaced by "first," "second," "third," etc., according to the order in which the elements are declared in the claims. Accordingly, in the following specification, the first component may be the second component in the claims.

[0023] It should be understood that the features in the following embodiments can be replaced, recombined, or mixed to complete other embodiments without departing from the spirit of the present invention.

[0024] In this invention, the display device ED can be a flexible display, a flat panel display, a curved display or other suitable display, and the display device ED can be a color display or a monochrome display, and the shape of the display device ED can be rectangular, circular, polygonal, a shape with curved edges or other suitable shapes.

[0025] Please refer to Figure 1 , Figure 1 The image shown is a cross-sectional schematic diagram of a display device according to a first embodiment of the present invention. Figure 1 As shown, the display device ED of this embodiment includes a light-emitting layer 100, a dimming layer 200, and a display layer 300. The light-emitting layer 100 and the dimming layer 200 are disposed below the display layer 300. The structure will be described in detail below. In this invention, the light-emitting layer 100 has a light-emitting area 100a, which provides appropriate backlight to the dimming layer 200 and the display layer 300, and the backlight brightness of each part of the light-emitting area 100a can be controlled as needed. Specifically, in this embodiment, the light-emitting layer 100 may have multiple light-emitting units LE within the light-emitting area 100a, and each light-emitting unit LE can be controlled independently to achieve separate control of the backlight brightness of each part of the light-emitting area 100a.

[0026] The light-emitting layer 100 can be self-emissive or non-self-emissive. A self-emissive light-emitting layer 100 includes an inorganic light-emitting diode (LED), such as a micro-LED, mini-LED, organic light-emitting diode (OLED), quantum dot light-emitting diode (QLED), or other suitable self-emissive elements. In this embodiment, the light-emitting layer 100 is non-self-emissive and may include a backlight 110 and a dimming panel 120. The dimming panel 120 is disposed on the backlight 110, which is a surface light source for providing initial backlight. The dimming panel 120 can be used to adjust the transmittance of the initial backlight in each region of the light-emitting area 100a, and can also adjust the backlight brightness at each position of the light-emitting layer 100, but is not limited thereto. The backlight 110 can be a direct-type backlight, an edge-type backlight, or other suitable backlight, wherein the light source may include inorganic light-emitting diodes (e.g., micro-light-emitting diodes, sub-millimeter light-emitting diodes), organic light-emitting diodes, quantum dot light-emitting diodes, or other suitable light sources. Furthermore, the backlight 110 may emit initial backlight of, for example, white light, blue light, or other suitable colors, depending on the type of display device (ED).

[0027] The dimming panel 120 includes a light switch structure AE that can control the initial backlight transmittance via an electrical signal. The light switch structure AE may include different components depending on the switching method. Specifically, in this embodiment, the dimming panel 120 may include a first dimming substrate 122, a dimming circuit layer 130, a dimming dielectric layer 126, a dimming light-shielding layer 128, and a second dimming substrate 124. The dimming circuit layer 130, the dimming dielectric layer 126, and the dimming light-shielding layer 128 may be disposed between the first dimming substrate 122 and the second dimming substrate 124, forming the light switch structure AE. However, the placement and structure of each structure are not limited thereto. The second dimming substrate 124 is located between the display layer 300 and the first dimming substrate 122. In other embodiments, the dimming panel 120 may include a mechanical switching structure, such as a microelectromechanical system (MEMS) and / or a digital micromirror device (DMD) to control whether the initial backlight passes through. The materials of the first dimming substrate 122 and the second dimming substrate 124 may each include glass, quartz, sapphire, polyimide (PI), polyethylene terephthalate (PET), and / or other suitable materials to serve as flexible or rigid substrates, but are not limited thereto. The materials of the first dimming substrate 122 and the second dimming substrate 124 may be the same or different from each other.

[0028] A dimming circuit layer 130 is disposed on the first dimming substrate 122 and includes one or more conductive layers, one or more insulating layers, and / or one or more semiconductor layers. For example, in this embodiment, Figure 1 The dimming circuit layer 130 is disposed on the first dimming substrate 122 and includes, but is not limited to, a first conductive layer 132, a first insulating layer 134, a first semiconductor layer 136, a second conductive layer 142, a second insulating layer 144, and a third conductive layer 152 stacked sequentially in the Z direction. In this embodiment, the dimming circuit layer 130 may include multiple dimming switching elements ASW (e.g., thin-film transistors composed of the first conductive layer 132, the first insulating layer 134, the first semiconductor layer 136, the second conductive layer 142, and the second insulating layer 144) and multiple control electrodes AME (e.g., the third conductive layer 152), located within the light-emitting region 100a. Figure 1 In the dimming switch element ASW, the gate can be formed by the first conductive layer 132, the source and drain can be formed by the second conductive layer 142, and the channel layer can be formed by the first semiconductor layer 136, allowing the dimming switch element ASW to form, for example, a bottom-gate transistor, but not limited to this; it can also be changed to a top-gate transistor, a dual-gate transistor, or other suitable transistor as needed. The type of dimming switch element ASW can be adjusted according to design requirements. Figure 1 In this embodiment, the control electrode AME can be formed by the third conductive layer 152, and the control electrode AME can be electrically connected to the drain of the dimming switch element ASW. Furthermore, the material of the conductive layer in the dimming circuit layer 130 may include metals, transparent conductive materials (e.g., indium tin oxide (ITO), indium zinc oxide (IZO), etc.), other suitable conductive materials, or combinations thereof. Examples of insulating layers in the dimming circuit layer 130 may include silicon oxide, silicon nitride, silicon oxynitride, other suitable insulating materials, or combinations thereof. Examples of semiconductor layers in the dimming circuit layer 130 may include polycrystalline silicon, amorphous silicon, metal oxide semiconductors, other suitable semiconductor materials, or combinations thereof. In this embodiment, the first conductive layer 132 and the second conductive layer 142 may include conductive materials with low impedance, such as metals, while the third conductive layer 152 may include transparent conductive materials, but is not limited thereto.

[0029] Furthermore, the dimming circuit layer 130 in this embodiment may selectively include a dimming drive circuit, a dimming data line, and a dimming scan line. The dimming drive circuit may be located outside the light-emitting region 100a of the light-emitting layer 100, while the dimming data line and the dimming scan line may be connected between the dimming drive circuit and the dimming switch element ASW. The dimming drive circuit can transmit the dimming update signal to the gate of the dimming switch element ASW through the dimming scan line, and can transmit the dimming grayscale signal to the source of the dimming switch element ASW through the dimming data line. When the dimming switch element ASW is turned on, the dimming grayscale signal is transmitted from the source of the dimming switch element ASW through the channel layer and the drain to the control electrode AME. In this embodiment, the dimming scan line may be formed by the first conductive layer 132, the dimming data line may be formed by the second conductive layer 142, and the dimming scan line and the dimming data line may extend in different directions (e.g., but not limited to, along direction X and direction Y, respectively).

[0030] A dimming dielectric layer 126 is disposed on the dimming circuit layer 130. The control electrode AME can control the transparency or grayscale level of the dimming dielectric layer 126 according to the received dimming grayscale signal, thereby controlling the intensity of the initial backlight provided by the backlight source 110 passing through the dimming dielectric layer 126 (i.e., the backlight intensity of the light-emitting layer 100). The dimming dielectric layer 126 may include liquid crystal, electrophoresis, or other media whose transparency can be changed according to an electrical signal. In this embodiment, the dimming dielectric layer 126 may include liquid crystal, but is not limited thereto. It should be noted that each light-emitting unit LE of the light-emitting layer 100 in this embodiment may selectively include a dimming switch element ASW, a control electrode AME electrically connected to the corresponding dimming switch element ASW, a dimming medium layer 126 partially corresponding to the control electrode AME, a dimming shielding layer 128 partially corresponding to the dimming switch element ASW, and a portion of the backlight 110 corresponding to the control electrode AME. The dimming switch element ASW, the control electrode AME, the partial dimming medium layer 126, and the partial dimming shielding layer 128 in the light-emitting unit LE may selectively form a light switch structure AE.

[0031] In this embodiment, the control electrode AME in the light switch structure AE of different light-emitting units (LEs) can receive the same or different dimming grayscale signals to adjust the transparency of the dimming dielectric layer 126 of different light-emitting units (LEs), thereby controlling the backlight intensity generated by the light-emitting units (LEs). For example, the dimming drive circuit of this embodiment can provide two dimming grayscale signals: a high grayscale value that makes the light-emitting unit (LE) brightest (e.g., the initial backlight high-penetration dimming dielectric layer 126) and a low grayscale value that makes the light-emitting unit (LE) darkest (e.g., the initial backlight low-penetration dimming dielectric layer 126). That is, each light-emitting unit (LE) in this embodiment can generate two backlight intensities, but this is not a limitation. It should be noted that, for ease of description below, when the light-emitting unit LE receives a high-modulation grayscale signal (in this embodiment, the control electrode AME of the light-emitting unit LE receives a high grayscale value) and generates a high backlight intensity, it can be referred to as turning on the light-emitting unit LE (or turning on the light switch structure AE). Conversely, when the light-emitting unit LE receives a low-modulation grayscale signal (in this embodiment, the control electrode AME of the light-emitting unit LE receives a low grayscale value) and generates a low backlight intensity, it can be referred to as turning off the light-emitting unit LE (or turning off the light switch structure AE). It is important to note that in this specification, turning off the light-emitting unit LE means that the light intensity of the light-emitting unit LE is lower than 20% of the maximum light intensity (e.g., in the highest grayscale state).

[0032] In this embodiment, a dimming shielding layer 128 is disposed on the second dimming substrate 124 to divide the light-emitting area 100a into multiple regions and to shield opaque or reflective structures (such as a dimming switch element ASW) in direction Z. The dimming shielding layer 128 has multiple opening units 128a, and each opening unit 128a corresponds to at least one light-emitting unit LE in direction Z. In this embodiment, each opening unit 128a corresponds to a control electrode AME in a light-emitting unit LE in direction Z, but this is not a limitation. The dimming shielding layer 128 can be disposed at any suitable location in the light-emitting layer 100. For example, in this embodiment, the dimming shielding layer 128 is located between the dimming medium layer 126 and the second dimming substrate 124; in other embodiments, the dimming shielding layer 128 is located between the dimming medium layer 126 and the first dimming substrate 122, but this is not a limitation. In addition, in this embodiment, the size of the opening unit 128a (such as the width in the cross section) can be smaller than the size of the light-emitting unit LE, and the backlight generated by each light-emitting unit LE will be emitted through the corresponding opening unit 128a.

[0033] The display layer 300 is disposed on the light-emitting layer 100 (for example, in this embodiment, the second dimming substrate 124 is located between the display layer 300 and the first dimming substrate 122), and the display layer 300 has a display area 300a and at least one peripheral area 300b located outside the display area 300a. The peripheral area 300b can be used to provide the required signal to the display area 300a so that multiple pixels in the display area 300a, in conjunction with the backlight, can display the image to be presented. In this embodiment, the peripheral area 300b surrounds the display area 300a, but is not limited thereto. It should be noted that each pixel in the display area 300a may include one or more sub-pixels SP; for example, if the display device ED is a monochrome display, each pixel may include one sub-pixel SP, and if the display device ED is a color display, each pixel may include, for example, three sub-pixels SP, but is not limited thereto. In detail, the display layer 300 may include a first display substrate 302, a display circuit layer 310, a display dielectric layer 306, a display light-shielding layer 308, and a second display substrate 304. The display circuit layer 310, display dielectric layer 306, and display light-shielding layer 308 may be disposed between the first display substrate 302 and the second display substrate 304, but their positions are not limited thereto. The materials of the first display substrate 302 and the second display substrate 304 may each include glass, quartz, sapphire, polyimide, polyethylene terephthalate, and / or other suitable materials to serve as flexible or rigid substrates, but are not limited thereto. The materials of the first dimming substrate 122, the second dimming substrate 124, the first display substrate 302, and the second display substrate 304 may be the same or different from each other.

[0034] The display circuit layer 310 is disposed on the first display substrate 302 and includes one or more conductive layers, one or more insulating layers, and / or one or more semiconductor layers. For example, in this embodiment, Figure 1 The display circuit layer 310 is disposed on the first display substrate 302 and includes, but is not limited to, a fourth conductive layer 312, a third insulating layer 314, a second semiconductor layer 316, a fifth conductive layer 322, a fourth insulating layer 324, and a sixth conductive layer 332 stacked sequentially in the Z direction. In this embodiment, the display circuit layer 310 may include multiple display switching elements DSW (e.g., thin-film transistors composed of the fourth conductive layer 312, the third insulating layer 314, the second semiconductor layer 316, the fifth conductive layer 322, and the fourth insulating layer 324) and multiple control electrodes DME (e.g., the sixth conductive layer 332), located within the display area 300a. Figure 1 In the display switching element DSW, the gate can be formed by the fourth conductive layer 312, the source and drain can be formed by the fifth conductive layer 322, and the channel layer can be formed by the second semiconductor layer 316, making the display switching element DSW a bottom-gate transistor, but not limited thereto. The type of display switching element DSW can be adjusted according to design requirements. Figure 1 In this embodiment, the control electrode DME can be formed by the sixth conductive layer 332, and the control electrode DME can be electrically connected to the drain of the display switching element DSW. Furthermore, the material of the conductive layer in the display circuit layer 310 may include metals, transparent conductive materials (e.g., indium tin oxide (ITO), indium zinc oxide (IZO), etc.), other suitable conductive materials, or combinations thereof. Examples of insulating layers in the display circuit layer 310 may include silicon oxide, silicon nitride, silicon oxynitride, other suitable insulating materials, or combinations thereof. Examples of semiconductor layers in the display circuit layer 310 may include polycrystalline silicon, amorphous silicon, metal oxide semiconductors, other suitable semiconductor materials, or combinations thereof. In this embodiment, the fourth conductive layer 312 and the fifth conductive layer 322 may include conductive materials with low impedance, such as metals, while the sixth conductive layer 332 may include transparent conductive materials, but is not limited thereto.

[0035] Furthermore, the display circuit layer 310 of this embodiment may optionally include a display driving circuit, display data lines, and display scan lines. The display driving circuit may be located in the peripheral area 300b, while the display data lines and display scan lines may be connected between the display driving circuit and the display switching element DSW. The display driving circuit can transmit the display screen update signal to the gate of the display switching element DSW via the display scan lines, and can transmit the display grayscale signal to the source of the display switching element DSW via the display data lines. When the display switching element DSW is turned on, the display grayscale signal is transmitted from the source of the display switching element DSW through the channel layer and the drain to the control electrode DME. In this embodiment, the display scan lines may be formed by the fourth conductive layer 312, and the display data lines may be formed by the fifth conductive layer 322. The display scan lines and display data lines may extend in different directions (e.g., but not limited to, along direction X and direction Y, respectively). In addition, in other embodiments, the display driving circuit of the display circuit layer 310 and the dimming driving circuit of the dimming circuit layer 130 may be electrically connected to each other, but this is not a limitation. In other embodiments, the dimming drive circuit may be disposed in the display circuit layer 310 and electrically connected to components in the dimming circuit layer 130 via, for example, external lines, but is not limited thereto.

[0036] The display medium layer 306 is disposed on the display circuit layer 310. The control electrode DME can control the transparency or grayscale level of the display medium layer 306 according to the received display grayscale signal, thereby controlling the intensity of the backlight provided by the light-emitting layer 100 passing through the display medium layer 306. The display medium layer 306 may include liquid crystal, electrophoresis, or other media whose transparency can be changed according to an electrical signal. In this embodiment, the display medium layer 306 may include liquid crystal, but is not limited thereto. It should be noted that each sub-pixel SP of the display layer 300 in this embodiment may selectively include a display switching element DSW, a control electrode DME (or pixel electrode) electrically connected to the display switching element DSW, a display medium layer 306 partially corresponding to the control electrode DME, a display light-shielding layer 308 partially corresponding to the display switching element DSW, and a light color conversion layer 309 corresponding to the control electrode DME. In this embodiment, the control electrode DME in different sub-pixels SP can receive the same or different display grayscale signals respectively, so as to adjust the transparency of the display medium layer 306 of different sub-pixels SP respectively, thereby controlling the light intensity passing through each sub-pixel SP. The display driving circuit of this embodiment can provide a suitable display grayscale signal to the control electrode DME in the sub-pixel SP according to the image to be generated, so as to generate the corresponding light intensity.

[0037] In this embodiment, a display light-shielding layer 308 is disposed on the second display substrate 304 to divide the display area 300a of the display layer 300 into multiple regions and to shield opaque or reflective structures (such as display switching elements DSW) in the Z direction. The display light-shielding layer 308 has multiple sub-pixel openings 308a, and each sub-pixel opening 308a corresponds to a sub-pixel SP in the Z direction. The display light-shielding layer 308 can be disposed at any suitable location in the display layer 300. For example, in this embodiment, the display light-shielding layer 308 is located between the display medium layer 306 and the second display substrate 304; in other embodiments, the display light-shielding layer 308 is located between the display medium layer 306 and the first display substrate 302, but this is not a limitation. Furthermore, in this embodiment, the size of the sub-pixel opening 308a (e.g., the width in the cross-section) can be smaller than the size of the sub-pixel SP, and light passing through each sub-pixel SP will exit through the corresponding sub-pixel opening 308a.

[0038] Furthermore, the display layer 300 may also include other components, structures, and / or film layers, disposed in suitable locations. For example, in Figure 1 In this embodiment, the display layer 300 further includes a light color conversion layer 309 disposed between the display medium layer 306 and the second display substrate 304. Each light color conversion layer 309 is disposed corresponding to a sub-pixel opening 308a of the display light-shielding layer 308, so that each sub-pixel SP can generate light of different colors, enabling the display device ED to display a color image. The light color conversion layer 309 may include a filter material, quantum dots, or other suitable light color conversion material. In one embodiment, if the light-emitting layer 100 emits white backlight, each light color conversion layer 309 can convert the white backlight into one of red, green, and blue light; in another embodiment, if the light-emitting layer 100 emits blue backlight, each light color conversion layer 309 can convert the blue backlight into one of red and green light, but this is not a limitation. In addition, in other embodiments, the dimming panel 120 may also include a light color conversion layer 309 disposed corresponding to an opening unit 128a of the dimming light-shielding layer 128.

[0039] The dimming layer 200 is disposed corresponding to the light-emitting layer 100, and the display layer 300 is disposed on the dimming layer 200. Specifically, the dimming layer 200 may be disposed between the display layer 300 and the light-emitting layer 100, or disposed within the light-emitting layer 100. For example, the dimming layer 200 may be disposed between the display layer 300 and the dimming panel 120, disposed within the dimming panel 120, or disposed between the dimming panel 120 and the backlight 110, but is not limited thereto. Figure 1In this embodiment, the dimming layer 200 is disposed between the display layer 300 and the dimming panel 120 (i.e., the dimming layer 200 is disposed on the backlight 110), and the dimming layer 200 is disposed on the surface of the second dimming substrate 124 facing the display layer 300. In this invention, the dimming layer 200 may include at least one dimming structure 210. It should be noted that if the dimming layer 200 includes multiple dimming structures 210, it means that the dimming layer 200 has multiple repeating units, and the repeating units are arranged in a direction perpendicular to the Z direction (e.g., the X direction and / or the Y direction), and each repeating unit can be defined as a dimming structure 210.

[0040] In this embodiment, as Figure 1 Each dimming structure 210 corresponds to at least three of the light-emitting units LE in the light-emitting layer 100, and / or each dimming structure 210 corresponds to at least three of the opening units 128a in the dimming panel 120, but is not limited thereto. It should be noted that in this embodiment, when a dimming structure 210 corresponds to a light-emitting unit LE or an opening unit 128a, the dimming structure 210 overlaps with the corresponding light-emitting unit LE or opening unit 128a in the Z direction, but is not limited thereto. For ease of description below, the three light-emitting units LE corresponding to the same dimming structure 210 are respectively referred to as the first light-emitting unit LE1, the second light-emitting unit LE2, and the third light-emitting unit LE3, while... Figures 1 to 4 , Figure 6 and Figure 11 In the middle, the first light-emitting unit LE1, the second light-emitting unit LE2, and the third light-emitting unit LE3 are arranged in order from left to right.

[0041] Furthermore, the display device ED may also include other suitable films, elements, and / or structures as needed. In this embodiment, such as Figure 1As shown, the display device ED may include a frame adhesive FA, which can be adhered to the first display substrate 302 and the second display substrate 304 of the display layer 300, and can also be adhered between the first dimming substrate 122 and the second dimming substrate 124 of the dimming panel 120. Furthermore, in this embodiment, the frame adhesive FA can also be adhered between the display layer 300 and the dimming layer 200, and can be made of an adhesive material, such as polyurethane (PU) foam adhesive, but is not limited thereto. Additionally, the frame adhesive FA can be provided in sheet form. In other embodiments, the frame adhesive FA can also be a fluid adhesive material and can be provided by coating, and is not particularly limited thereto. In other embodiments, the display layer 300 and the dimming layer 200 can be attached to each other by, for example, a full-coverage or patterned adhesive layer. Additionally, the display device ED of this embodiment may selectively include optical film layers, such as a diffuser (DF), a brightness enhancement film (BEF), or a polarizer (PL), but is not limited thereto. In this embodiment, the display device ED includes three polarizers PL, respectively located on the first dimming substrate 122 of the dimming panel 120, the first display substrate 302 of the display layer 300, and the second display substrate 304 of the display layer 300, but is not limited thereto. In other embodiments, the display device ED may also include a fourth polarizer PL, disposed between the second dimming substrate 124 of the dimming panel 120 and the dimming layer 200. In this embodiment, the optical axes of the polarizers of the first display substrate 302 and the second dimming substrate 124 may be the same. When four polarizers PL are included, the dimming layer 200 may be disposed on another substrate (not shown), and this substrate may be attached to the polarizers PL located on the second dimming substrate 124 by an adhesive layer, but is not limited thereto.

[0042] Please refer to Figure 2 and refer to Figure 1 , Figure 2 The diagram shown is a dimming structure of a display device according to a first embodiment of the present invention and a viewing angle control diagram of the corresponding light-emitting unit. The diagram is provided for clarity. Figure 2 The display layer 300 is omitted, and the structure of the light-emitting layer 100 is simplified. For example... Figure 1 and Figure 2As shown, the dimming structure 210 of the dimming layer 200 is used to adjust, change, and / or filter the light travel direction of the initial backlight generated by the backlight source 110 or the backlight generated by the light-emitting unit LE. Specifically, since the initial backlight generated by the backlight source 110 and / or the backlight generated by the light-emitting unit LE can travel in various directions, when these lights pass through the dimming structure 210 in the dimming layer 200, the dimming structure 210 can correspondingly adjust and / or change these lights to travel in a specific direction, and / or the dimming structure 210 can filter out the lights traveling in a specific direction. To enable the dimming structure 210 of the dimming layer 200 to adjust, change, and / or filter the light travel direction, the dimming structure 210 may include at least one of a lens structure, a prism structure, and a light-shielding structure, but is not limited thereto; the dimming structure 210 can be designed according to the requirements of the light travel direction.

[0043] In this embodiment, each dimming structure 210 may include a convex lens structure to adjust and / or change the light travel direction, and at least one light-emitting unit LE (e.g., the second light-emitting unit LE2) may be located at the focal point FO of the convex lens structure, but is not limited thereto. In other embodiments, the light-emitting unit LE (e.g., the second light-emitting unit LE2) may not be located at the focal point FO of the convex lens structure. In other embodiments, a dimming structure 210 may include multiple convex lens structures, and each convex lens structure may have different focal lengths and / or different shapes. In other embodiments, a dimming structure 210 may include a lens structure and a prism structure. In particular, among the light-emitting units LE (or aperture units 128a) corresponding to the same dimming structure 210, different light-emitting units LE (or different aperture units 128a) correspond to different parts of this dimming structure 210. Therefore, the backlight generated by different light-emitting units LE (or the backlight passing through different aperture units 128a) may have different light travel directions after passing through this dimming structure 210. For example, in Figure 2 In the dimming layer 200, the backlight of the first light-emitting unit LE1, the second light-emitting unit LE2, and the third light-emitting unit LE3 is incident on the dimming layer 200. After passing through the dimming structure 210 in the dimming layer 200, the backlight generated by the first light-emitting unit LE1 located on the left can travel to the right front, the backlight generated by the second light-emitting unit LE2 located in the middle can travel parallel to the Z direction, and the backlight generated by the third light-emitting unit LE3 located on the right can travel to the left front, but not limited thereto.

[0044] In this embodiment, since the backlight generated by the first light-emitting unit LE1, the second light-emitting unit LE2, and the third light-emitting unit LE3 can have different light travel directions after passing through the same dimming structure 210, if the first light-emitting unit LE1, the second light-emitting unit LE2, and the third light-emitting unit LE3 are all turned on, the viewing user can see backlight provided by different light-emitting units LE at different viewing angles. For example, in Figure 2 In this embodiment, when a user views from the right front of the dimming structure 210, they will see the backlight generated by the first light-emitting unit LE1; when the user views from the left front of the display device ED, they will see the backlight generated by the third light-emitting unit LE3; and when the user views from in front of the dimming structure 210 (between the left and right front), they will see the backlight generated by the second light-emitting unit LE2, but this is not a limitation. Therefore, in the three light-emitting units LE corresponding to one dimming structure 210 in this embodiment, the first light-emitting unit LE1 can provide the backlight for the user viewing from the first viewing angle VA1, the second light-emitting unit LE2 can provide the backlight for the user viewing from the second viewing angle VA2, and the third light-emitting unit LE3 can provide the backlight for the user viewing from the third viewing angle VA3. For example, in Figure 2 In this embodiment, the display device ED can provide a viewing angle of 120 degrees, and the included angles θ1, θ2, and θ3 of the first viewing angle VA1, the second viewing angle VA2, and the third viewing angle VA3 may be equal to or unequal to each other, but are not limited thereto. In other embodiments, the display device ED can provide a viewing angle of nearly 180 degrees, and the included angle θ2 of the second viewing angle VA2 may be greater than the included angles θ1 and θ3 of the first viewing angle VA1 and the third viewing angle VA3, but are not limited thereto.

[0045] Please refer to Figure 3 And at the same time refer to Figure 2 , Figure 3 The diagram shown is a schematic diagram of the viewing angle control of multiple dimming structures 210 and their corresponding light-emitting units LE according to the first embodiment of the present invention. The diagram is provided for clarity. Figure 3 The display layer 300 is omitted, and the structure of the light-emitting layer 100 is simplified. Figure 3 Each light-emitting unit (LE) is shown as an example with only one ray parallel to the Z-direction, but in reality, each LE emits light rays in many more directions. For example... Figure 2 and Figure 3 As shown, the user can adjust the switching state of each light-emitting unit LE of the display device ED in this embodiment according to the user's viewing needs. For example, in Figure 3 In the dimming structure 210 in the middle, the three light-emitting units LE are all turned on, so users can view from the first perspective VA1, the second perspective VA2, and the third perspective VA3; Figure 3Of the three light-emitting units LE corresponding to the dimming structure 210 on the left, since only the second light-emitting unit LE2 is turned on, the user can only view from the second perspective VA2 and cannot view from the first perspective VA1 or the third perspective VA3; Figure 3 Of the three light-emitting units LE corresponding to the dimming structure 210 on the right, since the first light-emitting unit LE1 and the third light-emitting unit LE3 are turned on, the user can watch from the first viewing angle VA1 and the third viewing angle VA3, but cannot watch from the second viewing angle VA2.

[0046] The following describes several viewing angle control scenarios for the display device ED in this embodiment. For example, the display area 300a of the display device ED can be divided into three regions (i.e., a left region, a middle region, and a right region) to control the switching state of the light-emitting units LE in each region respectively. However, the viewing angle control, operation method, region division method, and number of regions are not limited to this. In other embodiments, the display area 300a of the display device ED can be divided into more regions. Please refer to... Figure 4 , Figure 4 The diagram shown is a schematic diagram of the viewing angle control of a display device according to a first embodiment of the present invention, wherein... Figure 4 The display layer 300 is omitted, and the structure of the light-emitting layer 100 is simplified. For example... Figure 4 As shown, the display device ED located on the left side turns on the first light-emitting unit LE1 and turns off the second light-emitting unit LE2 and the third light-emitting unit LE3, allowing the user to view the display device ED on the left side from the first viewing angle VA1. The display device ED located in the middle area turns on the second light-emitting unit LE2 and turns off the first light-emitting unit LE1 and the third light-emitting unit LE3, allowing the user to view the display device ED in the middle area from the second viewing angle VA2. The display device ED located on the right side turns on the third light-emitting unit LE3 and turns off the first light-emitting unit LE1 and the second light-emitting unit LE2, allowing the user to view the display device ED on the right side from the third viewing angle VA3. Therefore, the user can only see the entire image displayed by the display device ED in the area A_1 (e.g., position P_1) where the first viewing angle VA1, the second viewing angle VA2, and the third viewing angle VA3 intersect. In other viewing areas, only a portion of the image can be seen. For example, position P_2 corresponding to the third viewing angle VA3 can only see the image on the right side, position P_3 corresponding to the first viewing angle VA1 can only see the image on the left side, or no image can be seen at all. For example, position P_4, where no backlight passes through, cannot see any image.

[0047] On the other hand, the display device ED of the present invention may include a tracking sensor for tracking the user's head, eyes, and / or face. For example... Figure 2As shown, when the privacy function of the display device ED is enabled, the display device ED can turn on the appropriate light-emitting units LE according to the user's position detected by the tracking sensor, so that the user's viewing area can see the entire display screen, while other viewing areas can only see part of the screen or not see the screen at all. Furthermore, when the user moves from the position of the display device ED, the tracking sensor can detect the change in user position, allowing the display device ED to adjust the on / off state of the light-emitting units LE according to the user's current position, thereby adjusting the viewing area where the entire display screen can be seen. Therefore, the user can still see the entire display screen after moving.

[0048] As described above, since the display device ED in this embodiment has a dimming layer 200, the backlight direction can be adjusted, changed, and / or filtered by controlling the switching state of each light-emitting unit LE in conjunction with the dimming structure 210 in the dimming layer 200. This allows for the control of the position of the entire image displayed by the display device ED, or the position of a portion of the image, as needed, thereby achieving a privacy function. Furthermore, in this embodiment, for example, all light-emitting units LE can be turned on to disable the privacy function of the display device ED. Additionally, since the switching state of the light-emitting units LE of the backlight-providing light-emitting layer 100 is controlled only, the resolution of the display layer 300 will not be affected even if the number of turned-on light-emitting units LE is different. In other words, the resolution of the display layer 300 will not change even when the display device ED is in privacy mode.

[0049] In this invention, in order to ensure that all sub-pixels SP of the display layer 300 can be illuminated by the backlight generated by the light-emitting units LE of the light-emitting layer 100, the area of ​​the light-emitting region 100a of the light-emitting layer 100 can be greater than or equal to the area of ​​the display region 300a of the display layer 300. For example, in Figure 1In this embodiment, the area of ​​the light-emitting region 100a of the light-emitting layer 100 is larger than the area of ​​the display region 300a of the display layer 300. Furthermore, in this invention, the correspondence and quantity relationship between the sub-pixels SP of the display layer 300 and the light-emitting units LE of the light-emitting layer 100 are not particularly limited. For example, in this embodiment, the size (e.g., the width in a cross-section) of one of the sub-pixels SP of the display layer 300 may be larger than the size (e.g., the width in a cross-section) of one of the light-emitting units LE of the light-emitting layer 100, and the number of sub-pixels SP may be less than the number of light-emitting units LE, but this is not a limitation. In other embodiments, the number of sub-pixels SP may be less than or equal to the number of light-emitting units LE. In other embodiments, the size (e.g., the width in a cross-section) of the sub-pixels SP may be less than or equal to the size (e.g., the width in a cross-section) of the light-emitting units LE. It should be noted that in the same dimming structure 210, the light-emitting unit LE (or aperture unit 128a) may illuminate the sub-pixels SP of the first light-emitting unit LE1, the second light-emitting unit LE2 and the third light-emitting unit LE3, which may be completely the same, partially the same or completely different, and the number of sub-pixels SP illuminated may be the same or different.

[0050] In addition, the more light-emitting units (LEs) (or aperture units 128a) corresponding to a dimming structure 210, the more groups the light travel direction can be divided into, making the viewing angle control more precise and improving the privacy function. Furthermore, the viewing angle provided by the display device ED can be any suitable angle, and the viewing angles provided by each light-emitting unit (LE) (or aperture unit 128a) corresponding to the same dimming structure 210 can be the same or different.

[0051] The display device of the present invention is not limited to the above embodiments. Other embodiments will continue to be disclosed below. However, in order to simplify the description and highlight the differences between the embodiments and the above embodiments, the same reference numerals are used to refer to the same elements below, and repeated parts will not be described again.

[0052] Please refer to Figure 5 and Figure 6 , Figure 5 The diagram shown is a cross-sectional view of a display device according to a second embodiment of the present invention. Figure 6 The diagram shown is a schematic diagram of the viewing angle control of a display device according to a second embodiment of the present invention. The diagram is simplified for clarity. Figure 6 The display layer 300 is omitted, and the structure of the light-emitting layer 100 is simplified. Figure 6 In the central area, only three rays of light are shown for each of the activated light-emitting units (LEs) as an example. Figure 6 The light-emitting units (LEs) in the left and right side areas are shown as an example, but in reality, each LE emits light in many more directions. For example... Figure 5As shown, the difference between this embodiment and the first embodiment is that the light-emitting layer 100 in this embodiment is self-emissive. In this embodiment, the light-emitting layer 100 includes a first dimming substrate 122, a dimming circuit layer 130, a light-emitting element LD, and a second dimming substrate 124, which are stacked sequentially in the Z direction. The light-emitting element LD includes a first electrode E1, a light-emitting portion LS, and a second electrode E2 stacked sequentially in the Z direction, but is not limited thereto. The light-emitting portion LS is electrically connected between the first electrode E1 and the second electrode E2 and is used to emit light. The first electrode E1 is electrically connected to the drain of the dimming switch element ASW of the dimming circuit layer 130. Because the light-emitting element LD in this embodiment is self-emissive... Figure 5 and Figure 6 Since the light emission is upward, the second electrode E2 may include a transparent conductive material. The light-emitting layer 100 may also include a barrier layer 180 and an encapsulation layer 182. The barrier layer 180 is disposed between the two light-emitting elements LD, and the encapsulation layer 182 is disposed between the light-emitting element LD and the second dimming substrate 124. A barrier wall 190 is also provided around the periphery of the light-emitting layer 100 to limit the range of the encapsulation layer 182 in the X and Y directions, but is not limited thereto. The material of the barrier wall 190 may be formed of an inorganic material. Inorganic materials may include silicon nitride, silicon oxide, silicon oxynitride, aluminum oxide, other suitable protective materials, or combinations thereof, but are not limited thereto.

[0053] like Figure 5 As shown, the light-emitting unit LE of the light-emitting layer 100 may include at least one light-emitting element LD and a corresponding dimming switch element ASW, but is not limited thereto. It should be noted that the display device ED of this embodiment can directly control the backlight intensity emitted by each light-emitting element LD by adjusting the voltage difference between the gate and source of each dimming switch element ASW. For example, it can make each light-emitting element LD emit backlight (hereinafter referred to as turning on the light-emitting unit LE) or make the light-emitting element LD not emit light (hereinafter referred to as turning off the light-emitting unit LE) as needed, but is not limited thereto. In addition, the light-emitting element LD of this embodiment may include a light-emitting diode, a micro light-emitting diode, a sub-millimeter light-emitting diode, an organic light-emitting diode, a quantum dot organic light-emitting diode, or other suitable light sources. Furthermore, in Figure 5 In this embodiment, the film layer stacking method in the dimming circuit layer 130 is different from that in the first embodiment. In this embodiment, the first semiconductor layer 136, the first insulating layer 134, the first conductive layer 132, the second insulating layer 144 and the second conductive layer 142 are stacked sequentially in the Z direction, so that the dimming switch element ASW is formed as a top gate transistor.

[0054] On the other hand, another difference between this embodiment and the first embodiment is that the dimming structure 210 in this embodiment may include multiple light-shielding portions. The dimming structure 210 in this embodiment includes two light-shielding portions 210b and an opening 210a located between the light-shielding portions 210b, but is not limited thereto. Specifically, the material of the dimming layer 200 may include a light-shielding material, wherein the light transmittance through the light-shielding material may be less than 50%, but is not limited thereto; for example, the light-shielding material may include black resin, metal, metal oxide, photoresist, ink, or any material with light absorption and / or blocking functions. Each dimming structure 210 corresponds to at least three of the light-emitting units LE in the light-emitting layer 100. Figure 5 and Figure 6 In this embodiment, the opening 210a corresponds to the second light-emitting unit LE2, and the light-shielding part 210b corresponds to the first light-emitting unit LE1 and the third light-emitting unit LE3, but is not limited thereto. The dimming structure 210 of this embodiment can be disposed between the light-emitting layer 100 and the display layer 300, for example, on the second dimming substrate 124, but is not limited thereto. The light-shielding part 210b and the opening 210a of the dimming structure 210 can be strips extending in the Y direction, but are not limited thereto. In other embodiments, the light-shielding part 210b and the opening 210a can be arranged alternately in the X and Y directions to form a grid.

[0055] like Figure 6 As shown, the dimming structure 210 of the dimming layer 200 in this embodiment is used to filter the light travel direction of the backlight generated by the light-emitting unit LE. For example, in Figure 6 Of the three light-emitting units LE corresponding to the dimming structure 210 in the middle, only the backlight emitted by the first light-emitting unit LE1 that travels to the right and forward can pass through the opening 210a of the dimming structure 210. Therefore, the dimming structure 210 can filter out the backlight traveling to the right and forward for the first light-emitting unit LE1, so that the first light-emitting unit LE1 can provide the backlight for the user to view from the first viewing angle VA1; only the backlight emitted by the second light-emitting unit LE2 that travels forward can pass through the opening 210a of the dimming structure 210, because... Therefore, the dimming structure 210 can filter out the backlight that travels forward for the second light-emitting unit LE2, so that the second light-emitting unit LE2 can provide backlight for the user to view from the second viewing angle VA2; the backlight emitted by the third light-emitting unit LE3 can only pass through the opening 210a of the dimming structure 210 for the backlight that travels to the left and forward. Therefore, the dimming structure 210 can filter out the backlight that travels to the left and forward for the third light-emitting unit LE3, so that the third light-emitting unit LE3 can provide backlight for the user to view from the third viewing angle VA3, but is not limited thereto.

[0056] Similarly, in Figure 6Of the three light-emitting units LE corresponding to the dimming structure 210 on the left, since only the second light-emitting unit LE2 is turned on, the user can only view from the second perspective VA2 and cannot view from the first perspective VA1 or the third perspective VA3. Similarly, in Figure 6 Of the three light-emitting units LE corresponding to the dimming structure 210 on the right, since the first light-emitting unit LE1 and the third light-emitting unit LE3 are turned on, the user can watch from the first viewing angle VA1 and the third viewing angle VA3, but cannot watch from the second viewing angle VA2.

[0057] Please refer to Figure 7 and Figure 8 , Figure 7 The figure shown is a cross-sectional schematic diagram of a display device according to a third embodiment of the present invention. Figure 8 The diagram shown is a schematic diagram of the viewing angle control of a display device according to a third embodiment of the present invention. The diagram is simplified for clarity. Figure 8 The display layer 300 was omitted, and the structure of the dimming panel 120 was simplified. Figure 10 Each light switch structure AE is, for example, illuminated by a single beam of light generated by the backlight 110. However, the backlight 110 actually emits light from multiple directions, and each light switch structure AE is illuminated by light from these multiple directions. For ease of description below, the three light switch structures AE corresponding to the same dimming structure 210 are referred to as the first light switch structure AE1 (with a first opening unit 128a_1), the second light switch structure AE2 (with a second opening unit 128a_2), and the third light switch structure AE3 (with a third opening unit 128a_3), respectively. Figure 7 , Figure 8 , Figure 9 and Figure 11 The first light switch structure AE1, the second light switch structure AE2, and the third light switch structure AE3 are arranged in order from left to right.

[0058] like Figure 7As shown, the content of the dimming structure 210 in this embodiment can be referred to the second embodiment, and will not be repeated here. The dimming layer 200 and the dimming panel 120 are disposed on the backlight 110. In this embodiment, the dimming layer 200 is disposed between the dimming panel 120 and the backlight 110. For example, the first dimming substrate 122 has a first surface 122a away from the display layer 300 and a second surface 122b close to the display layer 300, and the dimming layer 200 is disposed on the first surface 122a of the first dimming substrate 122 (such as between the first surface 122a of the first dimming substrate 122 and the polarizer PL). Alternatively, the dimming layer 200 can be disposed on the second surface 122b of the first dimming substrate 122, but is not limited thereto. In other embodiments, the dimming layer 200 can be disposed between the backlight 110 and the optical film layer (e.g., the diffuser DF). In another embodiment, the dimming layer 200 may be disposed between the second dimming substrate 124 and the display layer 300 (e.g., between the polarizer PL and the surface 124a of the second dimming substrate 124 near the display layer 300).

[0059] like Figure 7 and Figure 8 As shown, the dimming structure 210 of the dimming layer 200 in this embodiment is used to filter the light travel direction of the initial backlight generated by the backlight source 110. Then, the light switch structure AE of the dimming panel 120 controls whether the backlight in each light travel direction passes through. For example, in this embodiment, the dimming structure 210 can filter the initial backlight traveling to the left front, forward, and right front. The first light switch structure AE1 can control whether the initial backlight traveling to the left front passes through the dimming panel 120, the second light switch structure AE2 can control whether the initial backlight traveling forward passes through the dimming panel 120, and the third light switch structure AE3 can control whether the initial backlight traveling to the right front passes through the dimming panel 120, so as to achieve the function of controlling the backlight direction in different areas. Figure 8 In the middle section, because all three light switch structures AE1, AE2, and AE3 are activated, users can view the scene from three perspectives: first-person view VA1, second-person view VA2, and third-person view VA3. Similarly, in... Figure 8 On the left side, because only the second light switch structure AE2 is activated, the user can only view it from the second perspective VA2, and cannot view it from the first perspective VA1 or the third perspective VA3. Similarly, in Figure 8 On the right side, because the first light switch structure AE1 and the third light switch structure AE3 are activated, users can view from the first perspective VA1 and the third perspective VA3, but cannot view from the second perspective VA2.

[0060] Please refer to Figure 9 , Figure 9 The image shown is a cross-sectional schematic diagram of a display device according to a fourth embodiment of the present invention. Figure 9 As shown, the difference between this embodiment and the third embodiment is that the dimming layer 200 in this embodiment is located within the dimming panel 120. For example, the dimming layer 200 in this embodiment is disposed on the second surface 122b of the first dimming substrate 122 (e.g., between the second surface 122b of the first dimming substrate 122 and the buffer layer 250), but is not limited thereto. The buffer layer 250 can be an organic material or a transparent material such as glass, but is not limited thereto. Organic materials may include epoxy resin, acrylic resin such as polymethyl methacrylate (PMMA), benzocyclobutene (BCB), polyimide, and polyester, polydimethylsiloxane (PDMS), other suitable protective materials, or combinations thereof, but are not limited thereto. In other embodiments, the dimming layer may also be disposed on the surface 124b of the second dimming substrate 124 away from the display layer 300, for example, between the dimming shielding layer 128 and the second dimming substrate 124. In addition, in this embodiment, the size (e.g., width) of the opening unit 128a of the dimming light-blocking layer 128 may be the same as the size (e.g., width) of the sub-pixel opening 308a of the display light-blocking layer 308, but is not limited thereto.

[0061] Please refer to Figure 10 and Figure 11 , Figure 10 The diagram shown is a schematic representation of the display area according to the fifth embodiment of the present invention. Figure 11 The diagram shown is a cross-sectional view of a display device according to a fifth embodiment of the present invention. The diagram is simplified for clarity. Figure 11 The structure of the display layer 300 and the dimming panel 120 has been simplified, and Figure 11 The light switch structure AE, indicated by a background pattern, is in the off state, and Figure 11 The backlight 110 is only shown as an example with light rays parallel to the Z direction, but in reality, the backlight 110 emits light rays in many more directions. For example... Figure 10 and Figure 11 As shown, the difference between this embodiment and the first embodiment is that the display area 300a of the display layer 300 in this embodiment can be further divided into multiple sub-display areas. In this embodiment, the display area 300a may include a first sub-display area 300a_1 and a second sub-display area 300a_2, wherein the first sub-display area 300a_1 surrounds the second sub-display area 300a_2, but is not limited thereto. Each sub-display area 300a can individually turn on or off different light-emitting units (LEs) to create different display conditions. For example, in... Figure 11 In the middle, corresponding Figure 10In the cross-section line A-A', all the light-emitting units LE in the first sub-display area 300a_1 can be turned off, making the first sub-display area 300a_1 display a completely black screen; the second sub-display area 300a_2 can turn on the first light-emitting unit LE1 corresponding to the dimming structure 210, and can turn off the second light-emitting unit LE2 and the third light-emitting unit LE3, so that the user can only view the screen in the second sub-display area 300a_2 from the first viewing angle VA1, thus achieving partial privacy protection. In another case, all the light-emitting units LE in the first sub-display area 300a_1 can be turned on, so that the user can view the screen in the first sub-display area 300a_1 from the first viewing angle VA1, the second viewing angle VA2, and the third viewing angle VA3; while the second sub-display area 300a_2 can turn on the first light-emitting unit LE1 corresponding to the dimming structure 210, and can turn off the second light-emitting unit LE2 and the third light-emitting unit LE3, so that the user can only view the screen in the second sub-display area 300a_2 from the first viewing angle VA1, thus achieving partial privacy protection. The operation and display methods are not limited to those mentioned above.

[0062] In summary, the display device of the present invention has a dimming layer, thus the direction of backlight travel can be controlled by controlling the switching state of each light-emitting unit and / or each light switch structure, thereby achieving the function of privacy protection. Furthermore, in addition to not changing the resolution of the display layer, the display device of the present invention can also be combined with user tracking functionality when privacy protection is implemented.

[0063] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations, and features between embodiments can be arbitrarily combined and used as long as they do not violate the spirit of the invention or conflict with it. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A display device, characterized in that, include: Multiple light-emitting units, wherein the number of multiple light-emitting units is at least three, and wherein the multiple light-emitting units include a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; A first dimming structure is disposed on the plurality of light-emitting units and corresponds to the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit; and A display layer is disposed on the first dimming structure; The first light-emitting unit provides a first viewing angle, the second light-emitting unit provides a second viewing angle, and the third light-emitting unit provides a third viewing angle. The first viewing angle, the second viewing angle, and the third viewing angle are different from each other. When the first light-emitting unit is turned on and the second and third light-emitting units are turned off, the light-emitting device provides a first viewing angle range; when the first, second, and third light-emitting units are turned on, the light-emitting device provides a second viewing angle range. The first viewpoint range is smaller than the second viewpoint range.

2. The display device as described in claim 1, characterized in that, The first dimming structure overlaps with the plurality of light-emitting units.

3. The display device as described in claim 1, characterized in that, It also includes a second dimming structure, wherein the second dimming structure is disposed on the plurality of light-emitting units and is connected to the first dimming structure.

4. The display device as claimed in claim 1, characterized in that, There is a gap between the display layer and the first dimming structure.

5. The display device as claimed in claim 1, characterized in that, The first dimming structure includes one or more lens structures.

6. The display device as claimed in claim 1, characterized in that, It also includes a tracking sensor to track a user's location.

7. The display device as claimed in claim 6, characterized in that, The on / off state of each of the plurality of light-emitting units is adjusted according to the user's position.

Images