Electronic devices

Abstract

This disclosure provides an electronic device including an optical element assembly and a dimming element. The optical element assembly includes a first polarizing element, a second polarizing element, and a first compensation film. The first compensation film is disposed between the first polarizing element and the second polarizing element. The dimming element is disposed corresponding to the optical element assembly, wherein the second polarizing element is disposed between the first compensation film and the dimming element.

Description

Technical Field

[0001] This disclosure relates to an electronic device. Background Technology

[0002] Augmented Reality (AR) technology combines virtual images with real-world objects using optical systems. To improve the clarity of virtual images, the ambient light intensity in the virtual image area must be reduced. If light from the environment at large angles enters the optical system (such as waveguides), it will cause overlapping images, degrading the display quality of augmented reality. Therefore, large-angle light must be reduced to improve display quality. Summary of the Invention

[0003] This disclosure provides an electronic device that can reduce the transmittance of light at large angles.

[0004] According to embodiments disclosed herein, an electronic device includes an optical element group and a dimming element. The optical element group includes a first polarizing element, a second polarizing element, and a first compensation film. The first compensation film is disposed between the first polarizing element and the second polarizing element. The dimming element is disposed corresponding to the optical element group, wherein the second polarizing element is disposed between the first compensation film and the dimming element.

[0005] To make the above-mentioned features and advantages disclosed herein more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0006] Figures 1 to 5 These are schematic diagrams of electronic devices according to some embodiments of the present disclosure. Detailed Implementation

[0007] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0008] 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 "containing" and "comprising" are open-ended terms and should therefore be interpreted as "containing but not limited to...".

[0009] The directional terms used herein, such as "up," "down," "front," "back," "left," and "right," are for reference only when referring to the accompanying drawings. Therefore, the directional terms used are illustrative and not intended to limit this disclosure. In the accompanying drawings, each figure illustrates general features of the methods, structures, and / or materials used in specific embodiments. However, these figures should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative dimensions, thicknesses, and locations of various films, regions, and / or structures may be reduced or enlarged.

[0010] In this disclosure, a structure (or layer, element, substrate) located on / above another structure (or layer, element, substrate) can refer to the two structures being adjacent and directly connected, or to the two structures being adjacent but not directly connected. Indirect connection means that there is at least one intermediate structure (or intermediate layer, intermediate element, intermediate substrate, intermediate spacer) between the two structures, with the lower surface of one structure adjacent to or directly connected to the upper surface of the intermediate structure, and the upper surface of the other structure adjacent to or directly connected to the lower surface of the intermediate structure. The intermediate structure can be composed of a single or multiple solid or non-solid structures, without limitation. In this disclosure, when a structure is placed "on" other structures, it may mean that the structure is "directly" on other structures, or that the structure is "indirectly" on other structures, meaning that at least one structure is sandwiched between the structure and other structures.

[0011] The terms “about,” “equal to,” or “same” 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.

[0012] The ordinal numbers used in the specification and claims, such as "first," "second," etc., to modify elements, do not in themselves imply or represent any prior ordinal number of that element (or those elements), nor do they represent the order of one element with another, or the order of manufacturing processes. The use of these ordinal numbers is solely to clearly distinguish one named element from another element with the same name. The claims and specification may not use the same terminology; therefore, a first element in the specification may be a second element in the claims.

[0013] The electrical connections or couplings described in this disclosure can refer to direct or indirect connections. In the case of a direct connection, the endpoints of the components in two circuits are directly connected or connected to each other by a conductor segment. In the case of an indirect connection, there is a switch, diode, capacitor, inductor, resistor, other suitable components, or combinations of the above components between the endpoints of the components in two circuits, but not limited to these.

[0014] In this disclosure, the thickness, length, and width can be measured using an optical microscope, while the thickness or width can be measured from cross-sectional images in an electron microscope, but are not limited thereto. Furthermore, any two values ​​or directions used for comparison may have a certain degree of error. Additionally, the terms "equal to," "equivalent to," "identical," "substantially," or "approximately" used in this disclosure generally mean falling within 10% of a given value or range. Moreover, the terms "given range is from a first value to a second value" or "given range falls within the range of the first value to the second value" indicate that the given range includes the first value, the second value, and other values ​​in between. If the first direction is perpendicular to the second direction, the angle between the first and second directions can be between 80 and 100 degrees; if the first direction is parallel to the second direction, the angle between the first and second directions can be between 0 and 10 degrees.

[0015] 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 this disclosure. Features between embodiments can be arbitrarily mixed and combined as long as they do not violate the spirit of the invention or conflict with it.

[0016] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It is understood that these terms, for example, as defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined in the embodiments of this disclosure.

[0017] In this disclosure, the electronic device may include, but is not limited to, a display device, a backlight device, an antenna device, a sensing device, or a splicing device. The electronic device may be a bendable or flexible electronic device. The display device may be a non-emissive display device or a self-emissive display device. The electronic device may include, for example, liquid crystal, light-emitting diode, fluorescence, phosphorescence, quantum dot (QD), other suitable display media, or combinations thereof. The antenna device may be a liquid crystal type antenna device or a non-liquid crystal type antenna device. The sensing device may be a sensing device that senses capacitance, light, heat, or ultrasound, but is not limited to these. In this disclosure, electronic components may include passive and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. Diodes may include light-emitting diodes or photodiodes. Light-emitting diodes may include, for example, organic light-emitting diodes (OLEDs), mini LEDs, micro LEDs, or quantum dot LEDs, but are not limited to these. The splicing device may be, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that the electronic device may be any arrangement or combination of the aforementioned, but is not limited thereto. Furthermore, the electronic device may be rectangular, circular, polygonal, have curved edges, or other suitable shapes. The electronic device may have a drive system, a control system, a light source system, and other peripheral systems to support the display device, antenna device, wearable device (e.g., augmented reality or virtual reality), in-vehicle device (e.g., a car windshield), or splicing device. The following description uses a display device as an example of an electronic device or splicing device to illustrate the contents of this disclosure, but this disclosure is not limited thereto.

[0018] Figures 1 to 5 These are schematic diagrams of electronic devices according to some embodiments of the present disclosure. Figures 1 to 5 The technical solutions provided in different embodiments can be substituted for, combined or mixed with each other to constitute another embodiment without violating the spirit of this disclosure.

[0019] Please refer to Figure 1 The electronic device 1 may include an optical element group 10 and a dimming element 12. The optical element group 10 may include a first polarizing element P1, a second polarizing element P2, and a first compensation film C1. The first compensation film C1 is disposed between the first polarizing element P1 and the second polarizing element P2. The dimming element 12 is disposed corresponding to the optical element group 10, wherein the second polarizing element P2 is disposed between the first compensation film C1 and the dimming element 12.

[0020] In detail, the optical element group 10 can be used to filter incident light L at large angles, such as light with an incident angle θ greater than or equal to 50 degrees and less than 90 degrees, but is not limited thereto. For example, the incident angle θ is the angle between the incident direction of the incident light L and the first polarizing element P1 (or the second polarizing element P2) in the thickness direction Y (e.g., direction D3) of the electronic device 1. In some embodiments, such as Figure 1 As shown, the optical element assembly 10 may include two polarizing elements (such as a first polarizing element P1 and a second polarizing element P2) and a compensation film (such as a first compensation film C1), but is not limited thereto. In other embodiments, although not shown, the optical element assembly 10 may also include other film layers, such as one or more adhesive layers, more compensation films, or combinations thereof, but is not limited thereto.

[0021] The second polarizing element P2 is disposed corresponding to the first polarizing element P1. In this document, "one element corresponding to another element" generally refers to two elements that at least partially overlap. For example, the first polarizing element P1 and the second polarizing element P2 at least partially overlap in the thickness direction (e.g., direction D3) of the electronic device 1.

[0022] The first polarizing element P1 and the second polarizing element P2 may have mutually parallel transmission axes. For example, the transmission axes of the first polarizing element P1 and the second polarizing element P2 are both parallel to the plane formed by direction D1 and direction D2, and the angle between the transmission axis of either the first polarizing element P1 or the second polarizing element P2 and direction D1 (or direction D2) may be 0 degrees, 45 degrees, 90 degrees or 135 degrees, but is not limited thereto.

[0023] The first compensation film C1 can be a C-type compensation film, but is not limited thereto. The refractive index (N) of the C-type compensation film satisfies Nx = Ny ≠ Nz. For example, Nx, Ny, and Nz are the refractive indices in directions D1, D2, and D3, respectively. In some embodiments, Nx is, for example, the refractive index measured along direction D1, Ny is, for example, the refractive index measured along direction D2, and Nz is, for example, the refractive index measured along direction D3. In some embodiments, direction D3 is the thickness direction of the compensation film, and directions D1 and D2 are perpendicular to direction D3, and direction D1 is perpendicular to direction D2. The Nx, Ny, and Nz in the embodiments herein can all be defined as above, and therefore will not be repeated. The first compensation film C1 can be a single-layer film or a multi-layer film. For example, the first compensation film C1 can be a single-layer C-type compensation film or a multi-layer C-type compensation film, but is not limited thereto. The first compensation film C1 can have a phase retardation of the thickness (Rth), hereinafter referred to as the first thickness compensation value. Rth = (Nz - Nx) * d, where d is the thickness of the compensation film. The thickness compensation value can be measured using a phase delay measurement system such as Rets.

[0024] by Figure 1 For example, when the first compensation film C1 is a single-layer C-type compensation film and has a first thickness d1, the first thickness compensation value is equal to (Nz-Nx)*d1. On the other hand, when the first compensation film C1 is a multi-layer C-type compensation film, the first thickness compensation value is the sum of Rth of each C-type compensation film. The first thickness compensation value can be modulated by material selection or thickness control, thereby reducing the transmittance of large-angle light (e.g., ambient light) and reducing the probability of large-angle light penetrating the optical element group 10 and being transmitted to the dimming element 12.

[0025] Although not shown, the dimming element 12 may include an upper substrate, a lower substrate corresponding to the upper substrate, and a dielectric layer (such as a liquid crystal layer or a light-emitting layer) disposed between the upper and lower substrates. In some embodiments, the dimming element 12 may further include two conductive layers, which are electrically insulated from each other and may be disposed respectively between the upper substrate and the dielectric layer and between the lower substrate and the dielectric layer, or together on one side of the dielectric layer (e.g., stacked between the lower substrate and the dielectric layer). In other embodiments, the upper and lower substrates themselves are conductive, and the dimming element 12 may not include the two conductive layers. The state of the dielectric layer (such as the tilting direction of the liquid crystal) can be adjusted by controlling the potential difference between the two conductive layers, thereby achieving a dimming effect.

[0026] Although not shown, the dimming element 12 may also include a plurality of dimming units. The plurality of dimming units may be arranged in an array to enable independent dimming of different areas of the dimming element 12. In some embodiments, a display panel (such as a self-emissive display panel or a non-self-emissive display panel) or a liquid crystal panel may be used as the dimming element 12, and one of the upper and lower polarizing elements (if present) of the display panel (or liquid crystal panel) may be used as a second polarizing element P2, but is not limited thereto.

[0027] In some embodiments, the electronic device 1 can be applied to augmented reality. The dimming element 12 can be a transparent dimming panel and can also function as a light switch. The clarity of the virtual image can be improved by regionally controlling the transmittance of the dimming element 12, for example, by reducing the transmittance of the virtual image area. In other embodiments, the electronic device 1 can be applied to a display device with privacy requirements. The dimming element 12 can be a transparent display panel or an opaque display panel. The image can be provided through the dimming element 12, and the viewing angle can be limited by the optical element group 10, thereby achieving a privacy effect.

[0028] Please refer to Figure 2 Electronic device 1A and Figure 1 The main differences of electronic device 1 are explained below.

[0029] In electronic device 1A, dimming element 12 is disposed between two optical element groups (such as optical element group 10 and optical element group 14), and optical element group 14, dimming element 12 and optical element group 10 are arranged, for example, in direction D3.

[0030] In detail, the electronic device 1A further includes a third polarizing element P3, a second compensation film C2, and a fourth polarizing element P4. The second compensation film C2 is disposed between the second polarizing element P2 and the third polarizing element P3, and the dimming element 12 and the first compensation film C1 are disposed corresponding to the second compensation film C2. For example, the dimming element 12 may be disposed between the first compensation film C1 and the second compensation film C2. Furthermore, the fourth polarizing element P4 may be disposed between the second compensation film C2 and the dimming element 12. In some embodiments, a display panel (such as a self-emissive display panel or a non-self-emissive display panel) or a liquid crystal panel may serve as the dimming element 12, and the upper and lower polarizing elements of the display panel (or liquid crystal panel), if present, may serve as the second polarizing element P2 and the fourth polarizing element P4, respectively, but this is not a limitation.

[0031] In some embodiments, such as Figure 2 As shown, the third polarizing element P3, the second compensation film C2, and the fourth polarizing element P4 constitute the optical element group 14, but are not limited thereto. In other embodiments, although not shown, the optical element group 14 may also include other film layers, such as one or more adhesive layers, more compensation films, or combinations thereof, but are not limited thereto.

[0032] The third polarizing element P3 and the fourth polarizing element P4 may have mutually parallel transmission axes. For example, the transmission axes of the third polarizing element P3 and the fourth polarizing element P4 may both be parallel to the plane formed by direction D1 and direction D2, and the angle between the transmission axis of either the third polarizing element P3 or the fourth polarizing element P4 and direction D1 (or direction D2) may be 0 degrees, 45 degrees, 90 degrees, or 135 degrees, but is not limited thereto. Furthermore, depending on different design requirements (such as the type of liquid crystal), the transmission axes of the polarizing elements located on opposite sides of the dimming element 12 may be mutually perpendicular or mutually parallel, that is, the transmission axes of the third polarizing element P3 and the fourth polarizing element P4 may be parallel or perpendicular to the transmission axes of the first polarizing element P1 and the second polarizing element P2.

[0033] The second compensation film C2 may be a C-type compensation film, but is not limited thereto. The second compensation film C2 may be a single-layer film or a multi-layer film. For example, the second compensation film C2 may be a single-layer C-type compensation film or a multi-layer C-type compensation film, but is not limited thereto. The second compensation film C2 may have a thickness compensation value, hereinafter referred to as the second thickness compensation value. Figure 2For example, when the second compensation film C2 is a single-layer C-type compensation film and has a second thickness d2, the second thickness compensation value is equal to (Nz-Nx)*d2. On the other hand, when the second compensation film C2 is a multi-layer C-type compensation film, the second thickness compensation value is the sum of Rth of each C-type compensation film layer. The second thickness compensation value can be adjusted by material selection or thickness control.

[0034] The second thickness compensation value may differ from the first thickness compensation value. For example, the first thickness compensation value may be greater than or less than the second thickness compensation value to filter large-angle light in different wavelength bands. In some embodiments, the difference between the first and second thickness compensation values ​​(e.g., the absolute value of the first thickness compensation value minus the second thickness compensation value) may be greater than or equal to 125 nm and less than or equal to 375 nm, or greater than or equal to 150 nm and less than or equal to 350 nm, or greater than or equal to 175 nm and less than or equal to 325 nm, thereby reducing the transmittance of large-angle light in the visible light band (e.g., light with wavelengths from 400 nm to 700 nm). For example, the first thickness compensation value may be approximately 625 nm and the second thickness compensation value may be approximately 875 nm, or the first thickness compensation value may be approximately 650 nm and the second thickness compensation value may be approximately 850 nm, or the first thickness compensation value may be approximately 675 nm and the second thickness compensation value may be approximately 825 nm, but this is not a limitation.

[0035] The difference between the first thickness compensation value and the second thickness compensation value can be modulated by material selection or thickness control. In some embodiments, the first compensation film C1 and the second compensation film C2 may be formed of the same material and have different thicknesses. For example, the first thickness d1 may be 1 to 2 times the second thickness d2, or the second thickness d2 may be 1 to 2 times the first thickness d1, but is not limited thereto. For example, the first thickness d1 and the second thickness d2 may be 55 μm and 77 μm, respectively, but are not limited thereto. It should be understood that when the first compensation film C1 is a multilayer film, the first thickness d1 refers to the total thickness of the multilayer film constituting the first compensation film C1. When the second compensation film C2 is a multilayer film, the second thickness d2 refers to the total thickness of the multilayer film constituting the second compensation film C2. In other embodiments, the first compensation film C1 and the second compensation film C2 may be formed of different materials and have the same thickness. In still other embodiments, the first compensation film C1 and the second compensation film C2 may be formed of different materials and have different thicknesses.

[0036] In some embodiments, although not shown, electronic device 1A may include more optical element groups, and these optical element groups may be disposed on the same side or opposite side of dimming element 12, wherein adjacent optical element groups disposed on the same side of dimming element 12 may share polarizing element, but are not limited thereto.

[0037] Please refer to Figure 3 Electronic device 1B and Figure 2 The main differences of the electronic device 1A are explained below.

[0038] In electronic device 1B, dimming element 12 is disposed between third polarizing element P3 and fourth polarizing element, and second compensation film C2 and third polarizing element P3 are disposed between second polarizing element P2 and dimming element 12.

[0039] Optical element group 10 consists of a first polarizing element P1, a second polarizing element P2, and a first compensation film C1, while optical element group 14B consists of a second polarizing element P2, a second compensation film C2, and a third polarizing element P3. Optical element group 10 and optical element group 14B are disposed on the same side of the dimming element 12, and optical element group 10 and optical element group 14B share a single polarizing element (such as the second polarizing element P2).

[0040] The transmission axes of multiple polarizing elements located on the same side of the dimming element 12 are parallel to each other; that is, the transmission axes of the first polarizing element P1, the second polarizing element P2, and the third polarizing element P3 are parallel to each other. Furthermore, depending on different design requirements (such as the type of liquid crystal), the transmission axes of polarizing elements located on opposite sides of the dimming element 12 can be perpendicular or parallel to each other; that is, the transmission axis of the fourth polarizing element P4 can be parallel or perpendicular to the transmission axes of the first polarizing element P1, the second polarizing element P2, and the third polarizing element P3.

[0041] Please refer to Figure 4 Electronic device 1C and Figure 3 The main differences of the electronic device 1B are explained below.

[0042] In the electronic device 1C, the optical element group 10C includes, in addition to the first polarizing element P1, the second polarizing element P2, and the first compensation film C1, a first type A compensation film A1 and a second type A compensation film A2. The first type A compensation film A1 is disposed between the first compensation film C1 and the first polarizing element P1, and the second type A compensation film A2 is disposed between the first compensation film C1 and the second polarizing element P2. The refractive index (N) of the type A compensation film satisfies Nx≠Ny. The type A compensation film may have an in-plane phase difference value (Ro), where Ro = (Nx - Ny)*d. The first type A compensation film A1 and the second type A compensation film A2 may be single-layer or multi-layer films. The in-plane phase difference value can be modulated by material selection or thickness control, thereby further reducing the transmittance of light at large angles. In some embodiments, the in-plane phase difference value of each of the first type A compensation film A1 and the second type A compensation film A2 is 140±50 nm, but is not limited thereto.

[0043] The first type A compensation film A1 and the second type A compensation film A2 may have mutually perpendicular optical axes, that is, the angle between the optical axes of the first type A compensation film A1 and the second type A compensation film A2 is 90 degrees. For example, the optical axes of the first type A compensation film A1 and the second type A compensation film A2 are both parallel to the plane formed by direction D1 and direction D2, and the angle between the optical axis of the first type A compensation film A1 and direction D1 (or direction D2) may be 45 degrees, while the angle between the optical axis of the second type A compensation film A2 and direction D1 (or direction D2) may be 135 degrees, but this is not a limitation. In other embodiments, the angle between the optical axis of the first type A compensation film A1 and direction D1 (or direction D2) may be 135 degrees, while the angle between the optical axis of the second type A compensation film A2 and direction D1 (or direction D2) may be 45 degrees, but this is not a limitation either.

[0044] The electronic device 1C may further include a third type A compensation film A3 and a fourth type A compensation film A4, wherein the third type A compensation film A3 is disposed between the second polarizing element P2 and the second compensation film C2, and the fourth type A compensation film A4 is disposed between the second compensation film C2 and the third polarizing element P3. The third type A compensation film A3 and the fourth type A compensation film A4 may be single-layer or multi-layer films. The in-plane phase difference value can be modulated by material selection or thickness control, thereby further reducing the transmittance of large-angle light.

[0045] The third type A compensation film A3 and the fourth type A compensation film A4 may have mutually perpendicular optical axes, that is, the angle between the optical axes of the third type A compensation film A3 and the fourth type A compensation film A4 is 90 degrees. For example, the optical axes of the third type A compensation film A3 and the fourth type A compensation film A4 are both parallel to the plane formed by direction D1 and direction D2, and the angle between the optical axis of the third type A compensation film A3 and direction D1 (or direction D2) may be 45 degrees, while the angle between the optical axis of the fourth type A compensation film A4 and direction D1 (or direction D2) may be 135 degrees, but this is not a limitation. In other embodiments, the angle between the optical axis of the third type A compensation film A3 and direction D1 (or direction D2) may be 135 degrees, while the angle between the optical axis of the fourth type A compensation film A4 and direction D1 (or direction D2) may be 45 degrees, but this is not a limitation either.

[0046] Optical element group 14C consists of a second polarizing element P2, a second compensation film C2, a third polarizing element P3, a third type A compensation film A3, and a fourth type A compensation film A4. Optical element group 10C and optical element group 14C are located on the same side of the dimming element 12, and optical element group 10C and optical element group 14C share a single polarizing element (such as the second polarizing element P2).

[0047] Please refer to Figure 5Electronic device 1D and Figure 1 The main differences of electronic device 1 are explained below.

[0048] Electronic devices 1D, for example, are used in augmented reality and may include, for example, Figure 1 The electronic device 1, display 16, lens group 18, and waveguide 20 are shown, with the electronic device 1, display 16, and lens group 18 positioned on the side of waveguide 20 furthest from the user's eye E. Display 16 is positioned corresponding to the light-incident area R1 of waveguide 20, and lens group 18 is positioned between the light-incident area R1 and display 16. Electronic device 1 is positioned corresponding to the light-exit area R2 of waveguide 20, wherein the optical element group 10 of electronic device 1 (see reference...) Figure 1 It can be set in dimming element 12 (refer to) Figure 1 The optical element 12 can be disposed between the optical element group 10 and the light-incident area R1 of the waveguide 20, or between the optical element group 10 and the light-incident area R1 of the waveguide 20.

[0049] Display 16 is used to provide virtual images. For example, display 16 may be a miniature display, such as a miniature light-emitting diode display, a miniature organic light-emitting diode display, or a liquid crystal on silicon (LCoS) display, but is not limited thereto.

[0050] Image light IB from display 16 can be converged to incident light region R1 of waveguide 20 via lens group 18. Lens group 18 may include one or more lenses, without limitation.

[0051] The image light IB entering waveguide 20 can be transmitted in waveguide 20 via total internal reflection (TIR). For example, the material of waveguide 20 may include glass, plastic, ceramic, quartz, sapphire, or a combination of the above materials, but is not limited thereto.

[0052] The light-incident region R1 of waveguide 20 may have multiple light-guiding structures (not shown) that guide the image light IB entering waveguide 20 toward the light-outcident region R2 of waveguide 20. The light-outcident region R2 of waveguide 20 may have multiple light-guiding structures (not shown) that guide the image light IB transmitted in waveguide 20 toward the user's eye E.

[0053] The electronic device 1, positioned corresponding to the light-emitting area R2 of the waveguide 20, allows light rays B1 (e.g., ambient light) incident perpendicularly to the electronic device 1 to pass through while filtering light rays B2 incident at large angles. Filtering the light rays B2 incident at large angles by the electronic device 1 helps reduce the probability of large-angle light rays B2 entering the optical system (such as the waveguide 20), thereby reducing the probability of overlapping images and contributing to improved display quality in augmented reality (e.g., allowing the user to see a clear virtual image 16').

[0054] In other embodiments, electronic device 1 may be replaced with Figure 2 The electronic devices 1A to 1A shown Figure 4 The electronic device 1C shown. When electronic device 1 is replaced with Figure 2 When the electronic device 1A is shown, the first polarizing element P1 or the third polarizing element P3 in the electronic device 1A can be disposed adjacent to the waveguide 20. When the electronic device 1 is replaced with Figure 3 The electronic device 1B shown or Figure 4 When the electronic device 1C is shown, the first polarizing element P1 or the fourth polarizing element P4 in the electronic device 1A can be arranged adjacent to the waveguide 20.

[0055] In summary, in the embodiments disclosed herein, the transmittance of large-angle light can be reduced by modulating the first thickness compensation value of the first compensation film, thereby improving image quality. In some embodiments, the electronic device may include compensation films with different thickness compensation values ​​to filter large-angle light of different wavelengths. In some embodiments, the electronic device may also include an A-type compensation film to further filter large-angle light.

[0056] The above embodiments are only used to illustrate the technical solutions disclosed herein, and are not intended to limit them. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments disclosed herein.

[0057] While the embodiments and advantages of this disclosure have been described above, it should be understood that anyone skilled in the art can make changes, substitutions, and modifications without departing from the spirit and scope of this disclosure, and features between the embodiments can be arbitrarily mixed and substituted to form other new embodiments. Furthermore, the scope of protection of this disclosure is not limited to the processes, machines, manufacturing, material composition, apparatus, methods, and steps described in the specific embodiments of the specification. Anyone skilled in the art can understand from the content of this disclosure that current or future developed processes, machines, manufacturing, material composition, apparatus, methods, and steps can be used according to this disclosure, as long as they can perform substantially the same function or obtain substantially the same results in the embodiments described herein. Therefore, the scope of protection of this disclosure includes the aforementioned processes, machines, manufacturing, material composition, apparatus, methods, and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of this disclosure also includes combinations of various claims and embodiments. The scope of protection of this disclosure shall be determined by the appended claims.

Claims

1. An electronic device, characterized by comprising: Comprising: an optical element group comprising: a first polarizing element; a second polarizing element; and a first compensation film disposed between the first polarizing element and the second polarizing element; a light adjusting element disposed corresponding to the optical element group, wherein the second polarizing element is disposed between the first compensation film and the light adjusting element; a third polarizing element; and a second compensation film disposed between the second polarizing element and the third polarizing element, wherein the light adjusting element and the first compensation film are disposed corresponding to the second compensation film, the first compensation film has a first thickness compensation value, the second compensation film has a second thickness compensation value, and a difference between the first thickness compensation value and the second thickness compensation value is greater than or equal to 125 nm and less than or equal to 375 nm. 2.The electronic device of claim 1, wherein, The light adjusting element is disposed between the first compensation film and the second compensation film. 3.The electronic device of claim 1, wherein, The first compensation film and the second compensation film are C-type compensation films. 4.The electronic device of claim 1, wherein, Further comprising: a fourth polarizing element, wherein the light adjusting element is disposed between the third polarizing element and the fourth polarizing element. 5.The electronic device of claim 1, wherein, The first compensation film has a first thickness, and the second compensation film has a second thickness, wherein the first thickness is 1 to 2 times the second thickness, or the second thickness is 1 to 2 times the first thickness. 6.The electronic device of claim 1, wherein, The first compensation film and the second compensation film are single-layer films or multi-layer films. 7.The electronic device of claim 1, wherein, Further comprising: a fourth polarizing element disposed between the second compensation film and the light adjusting element. 8.The electronic device of claim 1, wherein, The optical element group further comprises: a first A-type compensation film disposed between the first compensation film and the first polarizing element; and a second A-type compensation film disposed between the first compensation film and the second polarizing element.

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