Stereoscopic display device and head-up display

Abstract

A stereoscopic display device includes a display panel and a switching panel disposed on the display panel. The switching panel includes a first electrode, a second electrode, and a layer of liquid crystal. The first electrode has a plurality of branches. The plurality of branches has a first electric potential. The second electrode has a second electric potential. The layer of liquid crystal is disposed between the first electrode and the second electrode. At a first frame time, the display panel provides one of a left-eye picture and a right-eye picture, and a potential difference between the first electric potential and the second electric potential is greater than zero. At a second frame time, the display panel provides the other of the left-eye picture and the right-eye picture, and the potential difference between the first electric potential and the second electric potential is less than zero. In addition, a head-up display including the stereoscopic display device is also proposed.

Description

Technical Field

[0001] This invention relates to a stereoscopic display device and a head-up display. Background Technology

[0002] Current stereoscopic display technologies can be divided into two categories: wearable stereoscopic display technologies, where the observer must use a special device (such as glasses) to view the image, and glasses-free stereoscopic display technologies, which can be viewed directly with the naked eye. Lens-type stereoscopic display technology is one such glasses-free stereoscopic technology. Its stereoscopic imaging method involves placing a thin film with side-by-side lenticular lenses in front of the display screen. Because the lenticular lenses on this film can change the direction of light travel, the light rays from the left-eye image pass through the film and are refracted to reach the user's left eye, and the light rays from the right-eye image pass through the film and are refracted to reach the user's right eye. When the user's left and right eyes see their respective corresponding images, parallax occurs, thus creating a stereoscopic effect. However, the more viewing angles the display panel needs to provide for the stereoscopic image, the more sets of left and right eye images the display panel needs to provide. With a fixed resolution, the more sets of left and right eye images the display panel provides, the lower the resolution of each set of left and right eye images becomes, thus reducing the resolution of the stereoscopic image. Summary of the Invention

[0003] The present invention provides a stereoscopic display device that can provide stereoscopic display images with high resolution.

[0004] The stereoscopic display device of the present invention includes a display panel and a switching panel disposed on the display panel. The switching panel includes a first electrode, a second electrode, and a laminar liquid crystal layer. The first electrode has multiple branches, wherein each branch has a first potential. The second electrode has a second potential. The laminar liquid crystal layer is disposed between the first electrode and the second electrode. During a first frame time, the display panel provides one of a left-eye image and a right-eye image, and the potential difference between the first potential and the second potential is greater than zero. During a second frame time following the first frame time, the display panel provides the other of the left-eye image and the right-eye image, and the potential difference between the first potential and the second potential is less than zero.

[0005] The head-up display of the present invention includes the aforementioned stereoscopic display device and a front windshield element. The front windshield element is disposed on the transmission path of the image beams carrying the left-eye image and the right-eye image, respectively. Attached Figure Description

[0006] Figure 1 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention.

[0007] Figure 2 This is a top view of the first substrate of the switching panel according to an embodiment of the present invention.

[0008] Figure 3 This is a bottom view of the second substrate of the switching panel according to an embodiment of the present invention.

[0009] Figure 4 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention.

[0010] Figure 5 This is a perspective view of a switching panel according to an embodiment of the present invention.

[0011] Figure 6 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention.

[0012] Figure 7 This is a perspective view of a switching panel according to an embodiment of the present invention.

[0013] Figure 8 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention.

[0014] Figure 9 This is a perspective view of a switching panel according to an embodiment of the present invention.

[0015] Figure 10 The diagram shows the operating state of a stereoscopic display device according to an embodiment of the present invention at the odd-numbered frame time.

[0016] Figure 11 The diagram shows the operating state of a stereoscopic display device according to an embodiment of the present invention at an even-numbered frame time.

[0017] Figure 12 Multiple electrical signals are shown applied to the first and second electrodes of a switching panel according to an embodiment of the present invention at multiple frame times.

[0018] Figure 13 This is a cross-sectional schematic diagram of a display panel, a light collimating element, and a switching panel according to an embodiment of the present invention.

[0019] Figure 14 This is a cross-sectional schematic diagram of a display panel, a light collimating element, and a switching panel according to another embodiment of the present invention.

[0020] Figure 15 This is a three-dimensional schematic diagram of an optical collimation element according to another embodiment of the present invention.

[0021] Figure 16 This is a cross-sectional schematic diagram of a display panel, a light collimating element, and a switching panel according to another embodiment of the present invention.

[0022] Figure 17 A head-up display of an embodiment of the present invention is shown at the first frame time.

[0023] Figure 18 A head-up display of an embodiment of the present invention is shown at the second frame time.

[0024] Figure 19 A head-up display according to an embodiment of the present invention is shown at the first frame time and the second frame time.

[0025] In the attached figures, the following labels are used:

[0026] 10: Stereoscopic display device

[0027] 20: Front windshield components

[0028] 100: Display panel

[0029] 110: pixels

[0030] 200: Switch Panel

[0031] 210: First substrate

[0032] 212: First basement

[0033] 214: First electrode

[0034] 214-1: First forked pattern

[0035] 214-2: Second finger fork pattern

[0036] 214a: Branch

[0037] 214g: gap

[0038] 222: Second basement

[0039] 224: Second electrode

[0040] 220: Second substrate

[0041] 230: Layered liquid crystal layer

[0042] 232:Liquid crystal molecules

[0043] 232a: Long axis

[0044] 300: Optical collimating element

[0045] 300A: Microlens Array

[0046] 302: Microlens

[0047] 300B: Light control film

[0048] 304: First translucent substrate

[0049] 306: Second translucent substrate

[0050] 308: Light-blocking structure

[0051] 300C: Lens Group

[0052] 310: Concave lens

[0053] 312: Convex lens

[0054] :distance

[0055] d1: First direction

[0056] d2: Second direction

[0057] g: distance

[0058] E: Electric field

[0059] First focal length

[0060] Second focal length

[0061] L, L L L R Image beam

[0062] N: Normal direction

[0063] S V1 S V2 :electric signal

[0064] T1: First frame time

[0065] T2: Second frame time

[0066] T3: Third frame time

[0067] T4: Fourth frame time

[0068] T5: Fifth frame time

[0069] T6: Sixth frame time

[0070] First potential

[0071] Second potential

[0072] VO: virtual image

[0073] VP: Virtual Image Plane

[0074] :spacing

[0075] Potential difference

[0076] First perspective

[0077] Second angle Detailed Implementation

[0078] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0079] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it may be directly on or connected to the other element, or an intermediate element may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected" to another element, no intermediate element is present. As used herein, "connection" can refer to physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may involve the presence of other elements between the two elements.

[0080] As used herein, “about,” “approximately,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement under discussion and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, the use of “about,” “approximately,” or “substantially” herein may be chosen based on the optical, etched, or other properties to select a more acceptable range of deviations or standard deviations, and may not require a single standard deviation to apply to all properties.

[0081] 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 invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant technology and the invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined herein.

[0082] Figure 1 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention. Please refer to... Figure 1The stereoscopic display device 10 includes a display panel 100. The display panel 100 has a plurality of pixels 110. In some embodiments, the display panel 100 may be a self-emissive display panel, wherein each pixel 110 includes at least one light-emitting element. For example, in some embodiments, the light-emitting element is, for example, a miniature light-emitting diode, but the invention is not limited thereto. In other embodiments, the display panel 100 may also be other types of self-emissive display panels (e.g., but not limited to: organic electroluminescent display panels) or non-self-emissive display panels (e.g., but not limited to: liquid crystal display panels).

[0083] The stereoscopic display device 10 also includes a switching panel 200 disposed on the display panel 100. When a user views the stereoscopic display device 10, the switching panel 200 is located between the user and the display panel 100.

[0084] Figure 2 This is a top view of the first substrate of the switching panel according to an embodiment of the present invention. Figure 3 This is a bottom view schematic diagram of the second substrate of the switching panel according to an embodiment of the present invention. Please refer to... Figure 1 , Figure 2 and Figure 3 The switching panel 200 includes a first substrate 210, a second substrate 220 disposed opposite to the first substrate 210, and a layered liquid crystal layer 230 disposed between the first substrate 210 and the second substrate 220.

[0085] Please refer to Figure 1 and Figure 2 The first substrate 210 includes a first base 212 and a first electrode 214 disposed on the first base 212. The first electrode 214 has a plurality of branches 214a spaced apart. For example, in some embodiments, the first electrode 214 may include a first forked pattern 214-1 and a second forked pattern 214-2, wherein the first forked pattern 214-1 and the second forked pattern 214-2 are disposed opposite to each other, and the plurality of branches 214a of the first forked pattern 214-1 and the plurality of branches 214a of the second forked pattern 214-2 are alternately arranged. However, the present invention is not limited thereto, and in other embodiments, the first electrode 214 may also include conductive patterns of other shapes. In some embodiments, the material of the first base 212 is, for example, glass, quartz, organic polymer, or other suitable materials, but the present invention is not limited thereto. In some embodiments, the first electrode 214 is, for example, a transparent electrode comprising a metal oxide, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, other suitable oxides, or a stacked layer of at least two of the above, but the invention is not limited thereto.

[0086] Please refer to Figure 1 and Figure 3The second substrate 220 includes a second base 222 and a second electrode 224. The second base 222 is disposed opposite to the first substrate 212. The second electrode 224 is disposed on the second base 222. A layered liquid crystal layer 230 is located between the first electrode 214 and the second electrode 224. In some embodiments, the second electrode 224 may be a full-surface electrode, which overlaps the plurality of branches 214a and the gaps 214g between the plurality of branches 214a, but the present invention is not limited thereto. In some embodiments, the material of the second base 222 may be glass, quartz, organic polymer or other suitable materials, but the present invention is not limited thereto. In some embodiments, the second electrode 224 may be, for example, a transparent electrode, which includes metal oxides, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, other suitable oxides, or a stacked layer of at least two of the above, but the present invention is not limited thereto.

[0087] Please refer to Figure 1 In some embodiments, the stereoscopic display device 10 further includes a collimating element 300 disposed between the display panel 100 and the switching panel 200. The display panel 100 is used to provide an image beam ( Figure 1 (Not shown). Generally, the image beam from the display panel 100 has a large degree of divergence, but through the action of the optical collimator 300, the divergence of the image beam can be reduced after passing through the optical collimator 300. The image beam with a smaller degree of divergence is more suitable for adjustment by the switching panel 200 to transmit in a more consistent direction, thereby providing a stereoscopic picture with low crosstalk.

[0088] Figure 4 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention. Figure 5 This is a perspective view of a switching panel according to an embodiment of the present invention. The first electrode 214 of the switching panel 200 has a first potential. The second electrode 224 of the switching panel 200 has a second potential. . Figure 4 and Figure 5 The first potential is shown. With the second potential potential difference The state of the stereoscopic display device 10 and its switching panel 200 at 0V.

[0089] Please refer to Figure 4 and Figure 5 The long axis 232a of the liquid crystal molecules 232 of the layered liquid crystal layer 230 (indicated in Figure 5 The image beam L is substantially parallel to the first substrate 212. The display panel 100 provides the image beam L. When switching the potential difference between the first electrode 214 and the second electrode 224 of the panel 200... At that time, the transmission direction of the image beam L remains essentially unchanged after passing through the switching panel 200.

[0090] Figure 6 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention. Figure 7 This is a perspective view of a switching panel according to an embodiment of the present invention. The first electrode 214 of the switching panel 200 has a first potential. The second electrode 224 of the switching panel 200 has a second potential. . Figure 6 and Figure 7 The first potential is shown. With the second potential potential difference When the value is greater than 0, this indicates the state of the stereoscopic display device 10 and its switching panel 200. Please refer to... Figure 5 and Figure 7 Switching the potential difference of panel 200 When the voltage changes from 0V to greater than 0V, an electric field E is formed between the first substrate 210 and the second substrate 220 of the switching panel 200. The direction of the electric field E is from the first substrate 210 to the second substrate 220, and the liquid crystal molecules 232 of the laminar liquid crystal layer 230 are driven by the electric field E to rotate their long axis 232a in a counterclockwise direction. At this time, the display panel 100 and the optical collimating element 300 provide an image beam L parallel to the normal direction N. The image beam L passes through its potential difference After the switching panel 200 is switched, its transmission direction will be changed to a first direction d1, wherein the first direction d1 is not parallel to the normal direction N of the switching panel 200 and is deflected to a first side of the normal direction N. The normal direction N is perpendicular to the second base 222. For example, in some embodiments, the first direction d1 may be a slanted direction deflected to the right of the normal direction N, but the present invention is not limited thereto.

[0091] Figure 8 This is a cross-sectional schematic diagram of a stereoscopic display device according to an embodiment of the present invention. Figure 9 This is a perspective view of a switching panel according to an embodiment of the present invention. The first electrode 214 of the switching panel 200 has a first potential. The second electrode 224 of the switching panel 200 has a second potential. . Figure 8 and Figure 9 The first potential is shown. With the second potential potential difference When the value is less than 0, this indicates the state of the stereoscopic display device 10 and its switching panel 200. Please refer to... Figure 5 and Figure 9 Switching the potential difference of panel 200 When the voltage changes from 0V to less than 0V, an electric field E is formed between the first substrate 210 and the second substrate 220 of the switching panel 200. The direction of the electric field E is from the second substrate 220 to the first substrate 210, and the liquid crystal molecules 232 of the layered liquid crystal layer 230 are driven by the electric field E2, causing their long axis 232a to rotate clockwise. The display panel 100 provides an image beam L, and the image beam L is transmitted along the normal direction N parallel to the switching panel 200. The image beam L passes through its potential difference After the switching panel 200 is switched, its transmission direction changes to a second direction d2, wherein the second direction d2 is not parallel to the normal direction N of the switching panel 200 and is deflected toward a second side of the normal direction N. For example, in some embodiments, the second direction d2 may be a slanted direction deflected to the left of the normal direction N, but the present invention is not limited thereto.

[0092] Please refer to Figures 4 to 9 By controlling the potential difference of the switching panel 200 The size of the image beam L can be adjusted by controlling the transmission direction of the image beam L through the switching panel 200. By matching the left and right eye images provided by the display panel 100 with the adjustment direction of the switching panel 200, the stereoscopic display device 10 can provide a high-resolution stereoscopic image. The following is in conjunction with... Figures 10 to 12 Let me give an example.

[0093] Figure 10 The diagram shows the operating state of a stereoscopic display device according to an embodiment of the present invention at the odd-numbered frame time. Figure 11 The diagram shows the operating state of a stereoscopic display device according to an embodiment of the present invention at an even-numbered frame time. Figure 12 Multiple electrical signals are shown applied to the first and second electrodes of a switching panel according to an embodiment of the present invention at multiple frame times.

[0094] Please refer to Figure 10 , Figure 11 and Figure 12 An electrical signal S is applied to the first electrode 214 of the switching panel 200. V1 The second electrode 224 of the switching panel 200 is subjected to an electrical signal S, which has a first potential V1. V2 It has a second potential V2. Please refer to... Figure 10 and Figure 12 During the first frame time T1, the display panel 100 provides one of the left-eye and right-eye images (e.g., the left-eye image), and the potential difference between the first potential V1 and the second potential V2 of the switching panel 200 is... The value is greater than zero. At this time, the image beam L from the display panel 100 will be transmitted along a first direction d1 that is not parallel to the normal direction N after passing through the switching panel 200. In some embodiments, the first direction d1 is, for example, directed toward the user's left eye, but the present invention is not limited thereto.

[0095] Please refer to Figure 11 and Figure 12 During the second frame time T2 following the first frame time T1, the display panel 100 provides the other of the left-eye and right-eye images (e.g., but not limited to: the right-eye image), and switches the potential difference between the first potential V1 and the second potential V2 of the switching panel 200. The value is less than zero. At this time, the image beam L from the display panel 100, after passing through the switching panel 200, will propagate along a second direction d2 that is not parallel to the normal direction N. In some embodiments, the second direction d2 is, for example, a direction toward the user's right eye, but the invention is not limited thereto.

[0096] By combining the image of the display panel 100 with the light control direction of the switching panel 200, during the first frame time T1, the user's right eye and left eye can receive one of the right eye images and the left eye images; during the second frame time T2, the user's right eye and left eye can receive the other of the right eye images and the left eye images; due to visual persistence, the user can perceive a stereoscopic image.

[0097] Please refer to Figure 10 , Figure 11 and Figure 12 In some embodiments, the electrical signal S applied to the first electrode 214 of the switching panel 200 V1 The electrical signal S can be an AC signal and is applied to the second electrode 224 of the switching panel 200. V2 This can be a DC signal. Please refer to [reference needed]. Figure 10 and Figure 12 That is, at either the odd-numbered frame time or the even-numbered frame time (e.g., the odd-numbered frame time; the first frame time T1, the third frame time T3, the fifth frame time T5, etc.), the potential difference between the first electrode 214 and the second electrode 224 All values ​​are greater than 0, and the display image provided by display panel 100 will be transmitted to either the user's left or right eye (e.g., the left eye) after passing through switching panel 200; please refer to... Figure 11 and Figure 12 At either the odd-numbered frame time or the even-numbered frame time (e.g., the even-numbered frame time; the second frame time T2, the fourth frame time T4, the sixth frame time T6, etc.), the potential difference between the first electrode 214 and the second electrode 224 All values ​​are less than 0, and the display image provided by the display panel 100 is transmitted to the user's left eye and right eye (e.g., the right eye) after being switched by the switching panel 200. In this way, the user can perceive multiple stereoscopic images and thus watch a stereoscopic video.

[0098] Please refer to Figure 6 , Figure 8 , Figure 10 and Figure 11 The first direction d1 and the normal direction N form a first angle. The second direction d2 and the normal direction N form a second angle. In some embodiments, the desired first angle can be achieved by appropriately designing the parameters of the switching panel 200. / Second Angle For example, in some embodiments, the parameters of the switching panel 200 include the birefringence difference of the lamellar liquid crystal layer 230. The distance g between the first substrate 212 and the second substrate 222 in the direction N perpendicular to the normal of the second substrate 222; the multiple branches 214a of the first electrode 214 are arranged in the direction x parallel to the first substrate 212, and adjacent branches 214a have a spacing. First angle , g and The following relationship must be satisfied: Second angle , g and The following relationship must be satisfied: First perspective First angle Between 0 and 1, and 1.

[0099] Figure 13 This is a cross-sectional schematic diagram of a display panel, a light collimating element, and a switching panel according to an embodiment of the present invention. Please refer to... Figure 13 In some embodiments, the aforementioned optical collimating element 300 may be a microlens array 300A. The image beam L from the display panel 100 can have its divergence reduced after passing through the microlens array 300A, and be more directly collimated towards the switching panel 200. In some embodiments, the microlens array 300A includes a plurality of microlenses 302, which may correspond to a plurality of pixels 110 of the display panel 100, but the present invention is not limited thereto.

[0100] Figure 14 This is a cross-sectional schematic diagram of a display panel, a light collimating element, and a switching panel according to another embodiment of the present invention. Figure 15 This is a three-dimensional schematic diagram of an optical collimating element according to another embodiment of the present invention. Please refer to... Figure 14 and Figure 15 In some embodiments, the aforementioned optical collimating element 300 may be an optical control film 300B. The optical control film 300B includes a first light-transmitting substrate 304, a second light-transmitting substrate 306, and a plurality of light-blocking structures 308. The second light-transmitting substrate 306 is disposed opposite to the first light-transmitting substrate 304. The plurality of light-blocking structures 308 are disposed between the first light-transmitting substrate 304 and the second light-transmitting substrate 306 and spaced apart from each other. A portion of the image beam L with a high degree of divergence will be blocked by the light-blocking structures 308 of the optical control film 300B, thereby ensuring high collimation of another portion of the image beam L passing through the optical control film 300B. In some embodiments, the optical control film 300B is, for example, a louver film, but the present invention is not limited thereto.

[0101] Figure 16 This is a cross-sectional schematic diagram of a display panel, a collimating element, and a switching panel according to another embodiment of the present invention. In some embodiments, the aforementioned collimating element 300 may be a lens group 300C. The lens group 300C includes a concave lens 310 and a convex lens 312. The concave lens 310 is disposed between the display panel 100 and the switching panel 200. The convex lens 312 is disposed between the concave lens 310 and the switching panel 200. In some embodiments, the concave lens 310 enables the switching panel 200 to form a virtual image VO on the display panel 100 and the switching panel 200. For example, the concave lens 310 has a first focal length. In some embodiments, the display panel 100 may be positioned at one first focal length of the concave lens 310. Up to twice the first focal length Between, while the switching panel 200 can be positioned at one first focal length from the concave lens 310. A virtual image VO is formed within the lens. In some embodiments, the convex lens 312 may be appropriately configured such that the virtual image VO falls exactly at the second focal length of the convex lens 312. Above. In this way, the image beam L provided by the display panel 100 can be adjusted into parallel light after passing through the convex lens 312 and then incident on the switching panel 200.

[0102] The concave lens 310 has a first focal length The convex lens 312 has a second focal length. The convex lens 312 is at a distance from the display panel 200. The convex lens 312 and the concave lens 310 are at a distance. In some embodiments, , , and The following relationship must be satisfied: In some embodiments, , , and The following relationship must be satisfied: .

[0103] Figure 17 A head-up display of an embodiment of the present invention is shown at the first frame time. Figure 18 A head-up display of an embodiment of the present invention is shown at the second frame time. Figure 19 A head-up display according to an embodiment of the present invention is shown at the first frame time and the second frame time.

[0104] Please refer to Figure 17 , Figure 18 and Figure 19 The head-up display 1 includes the aforementioned stereoscopic display device 10 and a windshield element 20. The windshield element 20 is disposed on the image beam L carrying the left-eye image and the right-eye image respectively. L L R On the transmission path. Please refer to Figure 17 In some embodiments, at the first frame time T1, the display panel 100 can provide the left eye image, and the potential difference between the first potential V1 and the second potential V2 of the switching panel 200 of the stereoscopic display device 10 is... Greater than zero (for reference) Figure 6 The image beam L carrying the left eye image. L After leaving the stereoscopic display device 10, the image is reflected by the windshield element 20 towards the user's left eye, allowing the user to perceive the left-eye image on the virtual image plane VP located in front of the windshield element 20. Please refer to... Figure 18 In some embodiments, at the first frame time T2, the display panel 100 can provide the right eye image, and the potential difference between the first potential V1 and the second potential V2 of the switching panel 200 of the stereoscopic display device 10 is... Less than zero (for reference) Figure 8 The image beam L carrying the right eye image. R After leaving the stereoscopic display device 10, the image is reflected by the windshield element 20 towards the user's right eye, allowing the user to perceive the right-eye image on the virtual image plane VP located in front of the windshield element 20. Please refer to... Figure 19 Through the persistence of vision in the human eye, the image beam L carrying the image from the left eye... L and the image beam L carrying the right eye image R A stereoscopic image can be formed in the user's mind. In some embodiments, the windshield element 20 is, for example, the windshield of a car. However, the invention is not limited thereto; in other embodiments, the windshield element 20 may be made of other materials, and the stereoscopic display device 10 may also be applied to other vehicles or situations.

[0105] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A stereoscopic display device, characterized in that, include: A display panel; as well as A switching panel, set on the display panel and including: A first electrode having multiple branches, wherein the branches have a first potential; A second electrode having a second potential; and A single-layer liquid crystal layer is disposed between the first electrode and the second electrode; During a first frame time, the display panel provides one of a left-eye image and a right-eye image, and the potential difference between the first potential and the second potential is greater than zero. During a second frame time following the first frame time, the display panel provides either a left-eye image or a right-eye image, and the potential difference between the first potential and the second potential is less than zero.

2. The stereoscopic display device as described in claim 1, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; During the first frame time, an image beam from the display panel passes through the switching panel and is transmitted along a first direction; During the second frame time, an image beam from the display panel passes through the switching panel and is transmitted along a second direction; The normal direction of the switching panel is perpendicular to the second base, the first direction is toward a first side of the normal direction of the switching panel, and the second direction is toward a second side of the normal direction of the switching panel.

3. The stereoscopic display device as described in claim 1, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; The long axis of a liquid crystal molecule in the layered liquid crystal layer is substantially parallel to the first substrate.

4. The stereoscopic display device as described in claim 1, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; This layered liquid crystal layer has a birefringence difference The first substrate and the second substrate have a distance g in a direction perpendicular to the normal of the second substrate, and the branches of the first electrode are spaced apart in a direction parallel to the first substrate. Arrangement, and .

5. The stereoscopic display device as described in claim 1, characterized in that, The electrical signal of the first electrode is an AC signal, and the electrical signal of the second electrode is a DC signal.

6. The stereoscopic display device as described in claim 1, characterized in that, Including: A collimating element is disposed between the display panel and the switching panel.

7. The stereoscopic display device as described in claim 6, characterized in that, The optical collimating element includes a microlens array or an optical control film.

8. The stereoscopic display device as described in claim 6, characterized in that, The optical collimating element includes: A concave lens is disposed between the display panel and the switching panel; and A convex lens is disposed between the concave lens and the switching panel.

9. The stereoscopic display device as described in claim 8, characterized in that, The concave lens has a first focal length. The convex lens has a second focal length. The convex lens is at a distance from the display panel. The convex lens and the concave lens have a distance between them. ,and .

10. The stereoscopic display device as claimed in claim 8, characterized in that, The concave lens has a first focal length. The convex lens has a second focal length. The convex lens is at a distance from the display panel. The convex lens and the concave lens have a distance between them. ,and .

11. A heads-up display, characterized in that, include: A stereoscopic display device, comprising: A display panel; and A switching panel, set on the display panel and including: A first electrode having multiple branches, wherein the branches have a first potential; and A second electrode having a second potential; and A single-layer liquid crystal layer is disposed between the first electrode and the second electrode; During a first frame time, the display panel provides one of a left-eye image and a right-eye image, and the potential difference between the first potential and the second potential is greater than zero. During a second frame time following the first frame time, the display panel provides either a left-eye image or a right-eye image, and the potential difference between the first potential and the second potential is less than zero; and A front windshield element is disposed on the transmission path of the image beams carrying the left eye image and the right eye image respectively.

12. The head-up display as claimed in claim 11, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; During the first frame time, an image beam from the display panel passes through the switching panel and is transmitted along a first direction; During the second frame time, an image beam from the display panel passes through the switching panel and is transmitted along a second direction; The normal direction of the switching panel is perpendicular to the second base, the first direction is located on a first side of the normal direction of the switching panel, and the second direction is located on a second side of the normal direction of the switching panel.

13. The head-up display as claimed in claim 11, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; The long axis of a liquid crystal molecule in the layered liquid crystal layer is substantially parallel to the first substrate.

14. The head-up display as claimed in claim 11, characterized in that, The switching panel further includes: A first substrate, wherein the first electrode is disposed on the first substrate; A second substrate is disposed opposite to the first substrate, wherein the second electrode is disposed on the second substrate, and the layered liquid crystal layer is located between the first electrode and the second electrode; The layered liquid crystal layer has a birefringence difference ∆n. The first substrate and the second substrate have a distance g in a direction perpendicular to the normal of the second substrate. The branches of the first electrode are arranged at a spacing w in a direction parallel to the first substrate, and 0 < 0. <1.

15. The head-up display as claimed in claim 11, characterized in that, In one stereoscopic display mode, the electrical signal of the first electrode is an AC signal, and the electrical signal of the second electrode is a DC signal.

16. The head-up display as claimed in claim 11, characterized in that, Including: A collimating element is disposed between the display panel and the switching panel.

17. The head-up display as claimed in claim 16, characterized in that, The optical collimating element includes a microlens array or an optical control film.

18. The head-up display as claimed in claim 16, characterized in that, The optical collimating element includes: A concave lens is disposed between the display panel and the switching panel; and A convex lens is disposed between the concave lens and the switching panel.

19. The head-up display as claimed in claim 18, characterized in that, The concave lens has a first focal length. The convex lens has a second focal length. The convex lens is at a distance from the display panel. The convex lens and the concave lens have a distance between them. ,and .

20. The head-up display as claimed in claim 18, characterized in that, The concave lens has a first focal length. The convex lens has a second focal length. The convex lens is at a distance from the display panel. The convex lens and the concave lens have a distance between them. ,and .

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