Display device, electronic apparatus, and vehicle

Abstract

A display device includes an image generation unit (110), a transflective member (120), and a curved mirror (130). The image generation unit (110) is used for generating imaging light containing image information and projecting the imaging light to the transflective part (120), the transflective part (120) is used for reflecting the imaging light to the curved mirror (130), the curved mirror (130) is used for reflecting the received imaging light to the transflective part (120), and the transflective part (120) is further used for transmitting the imaging light reflected by the curved mirror (130). Therefore, the light reflected by the curved mirror (130) can penetrate through the transflective part (120) and enter human eyes, the human eyes can see an amplified virtual image through the light, and the requirement for large-size viewing is met. Different from a real image display mode, the virtual image does not need to be received by a specific screen, so that the effect of displaying a large-size picture in a small space can be realized.

Description

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 14, 2021, with application number 202111195784.4 and application name “Display device, electronic device and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of image display, and in particular to a display device, an electronic device and a vehicle. Background Art

[0003] Image display technology is developing rapidly, and display sizes are getting larger and larger. However, the current large-screen display system (such as 80 inches or more) is very expensive. Laser TV can achieve a projection effect of more than 100 inches, but it requires a screen with specific functions (Fresnel screen) to enhance the viewing experience, and it takes up a lot of space. In addition, existing projectors often require a large projection distance and cannot form a magnified image at close range. Utility Model Content

[0004] In view of this, embodiments of the present application provide a display device, a vehicle, and an electronic device to provide a large-size display function.

[0005] In a first aspect, the display device provided in the present application may include an image generating unit, a transflective element, and a curved mirror.

[0006] Among them, the image generation unit is used for (configured to) generate imaging light containing image information, and project the imaging light to the transflective element, the transflective element is used to reflect the imaging light to the curved mirror, the curved mirror is used to reflect the received imaging light to the transflective element, and the transflective element is also used to transmit the imaging light reflected by the curved mirror. Therefore, the light reflected by the curved mirror can pass through the transflective element and enter the human eye. The human eye can see the magnified virtual image through the light, which meets the demand for large-size viewing. Unlike the real image display method, the virtual image does not require a specific screen to undertake, so it can achieve the effect of displaying a large-size picture in a small space.

[0007] In addition, in the solution of this embodiment, the above-mentioned transflective element can not only reflect the imaging light to the curved mirror, but also transmit the imaging light reflected by the curved mirror, that is, the transflective element is located in the optical path of the imaging light reflected by the curved mirror, and can transmit the imaging light reflected by the curved mirror. Therefore, the transflective element can be located closer to the curved mirror (can be located within the focal length of the curved mirror), which can effectively fold the optical path and reduce the volume of the display device.

[0008] In a possible implementation, the imaging light reflected by the transflective element and the imaging light transmitted by the transflective element have different incident angles. The transflective element can achieve the above function by coating.

[0009] In a possible implementation, the transflective element can transmit imaging light with an angle smaller than a first preset angle and reflect imaging light with an angle greater than a second preset angle. For example, the first preset angle is 30 degrees and the second preset angle is 45 degrees.

[0010] In a possible implementation, the polarization direction of the imaging light reflected by the transflective element is different from the polarization direction of the imaging light transmitted by the transflective element.

[0011] In a possible embodiment, the above-mentioned transflective element includes a polarized transflective element, and the polarization direction of the imaging light reflected by the polarized transflective element and the polarization direction of the imaging light transmitted are perpendicular to each other. For example, the imaging light reflected by the polarized transflective element is P polarized light, and the imaging light transmitted is S polarized light. Alternatively, the imaging light reflected by the polarized transflective element is S polarized light, and the imaging light transmitted is P polarized light.

[0012] In a possible implementation, the transflective element includes a polarizing transflective element, the imaging light reflected by the polarizing transflective element is circularly polarized light or elliptically polarized light, and the imaging light transmitted by the polarizing transflective element is linearly polarized light.

[0013] In a possible embodiment, the display device also includes a first polarization conversion device, which is located in the optical path between the transflective element and the curved mirror, and is used to change the polarization direction of the imaging light reflected from the transflective element and / or the polarization direction of the imaging light reflected from the curved mirror.

[0014] In a possible implementation, the display device further includes a diffusion element, which is located on the optical path between the image generating unit and the transflective element, and is used to diffuse the imaging light projected by the image generating unit. The diffusion element can play a role in light uniformity, thereby preventing the displayed image from being partially too bright or too dark.

[0015] In a possible embodiment, the display device further comprises a first polarizer located at the light exit side of the diffusion element, the first polarizer transmitting S polarized light or P polarized light. The first polarizer can transmit the S polarized light or P polarized light to the transflective element for transmission or reflection.

[0016] In one possible embodiment, the transflective element in the display device includes a semi-reflective and semi-transparent film and a second polarizer; the semi-reflective and semi-transparent film reflects part of the imaging light to the curved mirror, and transmits another part of the imaging light to the second polarizer; the second polarizer absorbs the other part of the incident imaging light and transmits the imaging light reflected by the curved mirror.

[0017] The second polarizer may be referred to as a polarization absorption film. The semi-reflective and semi-transparent film may be a semi-reflective and semi-transparent wave plate.

[0018] In one possible embodiment, the imaging light reflected by the semi-reflective and semi-transparent film in the transflective element is P-polarized light, the imaging light absorbed by the second polarizer is P-polarized light, and the transmitted imaging light is S-polarized light; or, the imaging light reflected by the semi-reflective and semi-transparent film is S-polarized light, the imaging light absorbed by the second polarizer is S-polarized light, and the transmitted imaging light is P-polarized light.

[0019] In a possible implementation, the semi-reflective and semi-transmissive film and the second polarizer are attached to each other.

[0020] The semi-reflective and semi-transmissive film and the second polarizer as a whole can realize the function of the polarized reflective and transflective element, that is, reflect P polarized light and transmit S polarized light, or reflect S polarized light and transmit P polarized light.

[0021] In a possible implementation, the imaging light reflected by the semi-reflective and semi-transmissive film in the transflective element is circularly polarized light or elliptically polarized light, and the imaging light transmitted by the semi-reflective and semi-transmissive film is circularly polarized light or elliptically polarized light.

[0022] In a possible embodiment, the transflective element also includes a second polarization conversion device located between the semi-reflective and semi-transparent film and the second polarizer, and the second polarization conversion device is used to change the polarization direction of the circularly polarized light or elliptically polarized light transmitted from the semi-reflective and semi-transparent element and / or the polarization direction of the circularly polarized light or elliptically polarized light reflected from the curved mirror.

[0023] In a possible implementation, the semi-reflective and semi-transmissive film, the second polarization conversion device and the second polarizer are attached to each other.

[0024] In a possible implementation, the display device further includes a third polarization conversion device located on the light-emitting side of the first polarizer, and the third polarization conversion device is used to change the polarization direction of the polarized light transmitted from the first polarizer.

[0025] In a possible implementation, the imaging light projected by the image generating unit is linearly polarized light, circularly polarized light, or elliptically polarized light.

[0026] In a possible implementation, the first polarization conversion device in the display apparatus is also located on the optical path between the polarization transflective element and the image generating unit, and is used to change the polarization direction of the imaging light from the image generating unit.

[0027] At this time, the first polarizer can be arranged in parallel with the polarization transflective element or attached to the polarization transflective element, and the overall structure is more compact.

[0028] In other embodiments, the first polarization conversion device can be located in the optical path between the polarization transflective element and the diffusion element, the polarizer, and the third polarization conversion device, that is, the imaging light emitted by the image generating unit can pass through the diffusion element, the polarizer, and the third polarization conversion device in sequence to reach the first polarization conversion device, and the first polarization conversion device transmits the imaging light to the polarization transflective element.

[0029] In a possible implementation, the curved mirror is a multi-focal curved mirror or a free-form curved mirror.

[0030] In a possible implementation, the image generation unit in the display device includes a light source, an imaging module, and a projection lens. The light source is used to output a light beam to the imaging module; the imaging module is used to generate imaging light containing image information according to the light beam; and the projection lens is used to project the imaging light to the transflective element.

[0031] In a possible implementation, the transflective element is located within the focal length of the curved mirror. Further, the image reflected by the transflective element can be magnified and displayed by the curved mirror.

[0032] In the above embodiments, the first polarization conversion device, the second polarization conversion device, and the third polarization conversion device may be a 1 / 4 wave plate, two 1 / 8 wave plates, or an optical rotator.

[0033] In a second aspect, the present application provides an electronic device, which includes the display device described in the first aspect.

[0034] In a third aspect, the present application also provides a vehicle, which includes the display device as described in the first aspect.

[0035] In a possible implementation manner, the display device is installed on a seat of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1a A schematic diagram of a display device disclosed in an embodiment of the present application as a common display;

[0037] Figure 1b A schematic diagram of a display device disclosed in an embodiment of the present application as a television;

[0038] Figure 1c A schematic diagram of a display device disclosed in an embodiment of the present application as a vehicle-mounted display;

[0039] Figure 2 A schematic diagram of the structure of a display device disclosed in an embodiment of the present application;

[0040] Figure 3A schematic diagram of the structure of an image generating unit in a display device provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0044] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0045] Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0046] Fig. 9 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0047] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0048] Fig.11 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0049] Fig.12 It is a circuit diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The present application provides a display device, an electronic device and a vehicle. The display device can be used as a common display (e.g. Figure 1a 100a in the figure) for office use, and can also be used as a television (for example Figure 1b 100b) for home entertainment (as a TV), or can be used for in-vehicle display (for example Figure 1c As shown in 100c in FIG. 1 , the display device is installed on a seat of a vehicle). The physical size, display size, and resolution of the display device can be adjusted according to the usage scenario.

[0051] In the present application, the display device may also be referred to as a display system or a virtual image display device. The units or modules included in the display device may be referred to as components or mechanisms.

[0052] refer to Figure 2 , Figure 2 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0053] like Figure 2 As shown, the display device includes an image generation unit (Picture Generation Unit, PGU) 110, a transflective element 120 and a curved mirror 130. The image generation unit 110 is used to generate imaging light containing image information and project the imaging light to the transflective element 120; the transflective element (which can be called a transflective element or a transflective component) 120 is used to reflect the imaging light to the concave surface of the curved mirror 130, and the curved mirror 130 is used to reflect the received imaging light to the transflective element 120, and the transflective element 120 is also used to transmit the imaging light reflected by the curved mirror 130.

[0054] In the display device provided in this embodiment, the concave surface of the curved mirror 130 is used as a reflective surface, which is used to magnify the image reflected by the transflective element 120 (for example, the transflective element 120 is located within the focal length of the curved mirror 130), so the above-mentioned display device can zoom in and magnify the image generated by the image generation unit 110. The user's eyes can receive the light reflected by the curved mirror 130, so as to observe the magnified virtual image (the reverse extension line of the actual light). Compared with the projector or large-size TV in the prior art, the display device provided in this embodiment can display a virtual image, so it does not require a specific screen or occupy a large space to display a large-size picture.

[0055] like Figure 2 As shown, the display device provided in this embodiment may include a diffusion element (which may be a diffusion screen or a diffusion plate) 140, which is located on the optical path between the image generating unit 110 and the transflective element 120, and is used to diffuse the imaging light projected by the image generating unit 110 so that the brightness of the displayed image is uniform. For example, the imaging light projected by the image generating unit 110 is diffusely reflected or uniformly transmitted by the diffusion plate.

[0056] In the display device provided in the embodiment of the present application, the transflective element 120 may be a coated reflector or a polarized transflective element. The coated reflector may reflect light whose incident angle is less than a first threshold value, and transmit light whose incident angle is greater than a second threshold value. By adjusting the positions of the curved mirror 130 and the diffusion element 140, the imaging light transmitted by the diffusion element may be reflected by the transflective element 120, and the light reflected by the curved mirror 130 may be transmitted to the human eye by the transflective element 120. The first threshold value may be 40 degrees, and the second threshold value may be 50 degrees.

[0057] Figure 3 A schematic diagram of the structure of an image generating unit in a display device provided in an embodiment of the present application.

[0058] like Figure 3As shown, the image generating unit includes a light source 101, an imaging module 102 and a projection lens 103. The image generating unit can be used in the aforementioned display device or can be used independently.

[0059] The light source 101 in this embodiment outputs a light beam (white light) to the imaging module 102. The imaging module 102 can generate a source image using the light beam 1. The projection lens 103 is used to project the imaging light outward, and it can be a short-focus lens.

[0060] The imaging module 102 in this embodiment can be a Liquid Crystal On Silicon (LCOS) display, an Organic Light-Emitting Diode (OLED) display, a Liquid Crystal Display (LCD), a Digital Light Procession (DLP) display or a Micro-Electro-Mechanical Systems (MEMS) display.

[0061] The light source 101 in this embodiment may include a three-color light source (a blue light source 1011, a green light source 1012, and a red light source 1013). The white light output after the monochromatic light emitted by the three-color light sources (which may be referred to as three primary color light sources) is mixed is input into the imaging module 102, thereby generating a source image. The light source 101 may also include a first wave plate 1014 and a second wave plate (a semi-reflective and semi-transmissive wave plate) 1015. The above-mentioned blue light source 1011, green light source 1012, and red light source 1013 may be a light-emitting diode (LED) light source, or a laser diode light source.

[0062] The first wave plate 1014 is located on the optical path of the light (light) output by the light sources 1011 and 1012, and is used to transmit and reflect the light. For example, the first wave plate 1014 transmits the blue light emitted by the light source 1011, and reflects the green light emitted by the light source 1012, and the reflected light and the transmitted light are mixed and input into the second wave plate 1015.

[0063] The second wave plate 1015 is also located on the optical path of the three-color light output by the three-color light sources (1011, 1012, 1013), and is used to transmit and reflect the three-color light. For example, the second wave plate 1015 transmits the blue light emitted by the light source 1011, transmits the green light emitted by the light source 1012, and reflects and transmits the red light emitted by the light source 1013. The reflected red light and the two-way transmitted light (blue light and green light) are mixed and input into the imaging module 102.

[0064] Figure 4 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0065] like Figure 4 As shown, the display device includes an image generating unit 210, a transflective element (a transflective P-reflective S polarizer 221 in this embodiment), a curved mirror 230, a diffusion element 240, a first polarization conversion device (a quarter wave plate 250 in this embodiment) and a first polarizer (an S polarizer 241 in this embodiment). The image generating unit 210, the curved mirror 230 and the diffusion element 240 respectively have the same functions as the image generating unit 110, the curved mirror 130 and the diffusion element 140 in the above-mentioned embodiment, and are not described in detail here.

[0066] The P-reflective S polarizer 221 can reflect S polarized light and transmit P polarized light, and the polarization directions of the S polarized light and the P polarized light are perpendicular to each other.

[0067] The 1 / 4 wave plate 250 is located on the optical path between the transparent P-reflective S polarizer 221 and the curved mirror 230, and is used to change the polarization direction of the imaging light reflected from the transparent P-reflective S polarizer 221 and the polarization direction of the imaging light reflected from the curved mirror 230. The 1 / 4 wave plate 250 is located on the light exit side of the curved mirror 230 and covers the curved mirror 230.

[0068] The S polarizer 241 is located on the light-emitting side of the diffusion element 240 and transmits S polarized light.

[0069] In the display device provided in the present embodiment, after the imaging light transmitted by the diffusion element 240 is filtered by the S polarizer 241, the S polarized light (the polarization direction shown in the figure is perpendicular to the paper surface) in the imaging light is filtered out, so that the S polarized light is transmitted to the P-reflective S polarizer 221. The P-reflective S polarizer 221 reflects the S polarized light to the 1 / 4 wave plate 250, and the 1 / 4 wave plate 250 performs a first phase delay on the incident S polarized light, and the S polarized light becomes circularly polarized light or elliptically polarized light. The curved mirror 230 reflects the polarized light with the first phase delay, that is, the reflected polarized light enters the 1 / 4 wave plate 250 again, and the 1 / 4 wave plate 250 performs a second phase delay on the polarized light reflected by the curved mirror 230, and the circularly polarized light or elliptically polarized light becomes P polarized light. After two phase delays of the above-mentioned 1 / 4 wave plate 250, the incident S polarized light becomes P polarized light (the polarization direction in the figure is parallel to the paper surface) and is emitted. The P polarized light can be transmitted from the P-reflective S polarizer 221 to the human eye, and the human eye can then observe the magnified virtual image.

[0070] In the display device provided in this embodiment, the polarizer can be located in the image generating unit 210 (for example, on the light emitting side of the projection lens of the image generating unit 210). In this case, the image generating unit 210 directly projects S polarized light to the diffusion element 240, and the polarizer on the light emitting side of the diffusion element 240 is no longer needed.

[0071] In this embodiment, the 1 / 4 wave plate 250 can cover the entire curved mirror 230, so that the light reflected by the PS polarizer 221 and the light reflected by the curved mirror 230 both pass through the 1 / 4 wave plate, thereby improving the utilization rate of light.

[0072] Figure 5 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0073] Figure 5 The display principle and Figure 4 The difference is that the transflective element in this embodiment is a transflective S-P polarizer 321, and the first polarizer in this embodiment is a P polarizer 341. The image generating unit 310, the curved mirror 330, and the diffusion element 340 have the same functions as the image generating unit 210, the curved mirror 230, and the diffusion element 240 in the above-mentioned embodiment, and are not described in detail here.

[0074] The S-transmitting and P-reflecting polarizer 321 can reflect P polarized light and transmit S polarized light. The P polarizer 341 is located on the light-emitting side of the diffusion element 340 and transmits P polarized light. The P polarizer can also be a P polarizer.

[0075] In the display device provided in the present embodiment, after the imaging light transmitted by the diffusion element 240 is filtered by the P polarizer 341, the P polarized light (the polarization direction shown in the figure is parallel to the paper surface) in the imaging light is filtered out, so that the P polarized light is transmitted to the S-transmitting and P-reflecting polarizer 321. The S-transmitting and P-reflecting polarizer 321 reflects the P polarized light to the 1 / 4 wave plate 350, and the 1 / 4 wave plate 350 performs a first phase delay on the incident P polarized light, and the P polarized light becomes circularly polarized light or elliptically polarized light. The curved mirror 330 reflects the polarized light with the first phase delay, that is, the reflected polarized light enters the 1 / 4 wave plate 350 again, and the 1 / 4 wave plate 350 performs a second phase delay on the polarized light reflected by the curved mirror 330, and the circularly polarized light or elliptically polarized light becomes S polarized light. After two phase delays of the 1 / 4 wave plate 350, the incident P polarized light is converted into S polarized light and emitted. The S polarized light can be transmitted from the S-reflective P polarizing plate 321 to the human eye, and the human eye can observe the magnified virtual image.

[0076] Figure 6 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0077] Figure 6The display device and Figure 4 The display device shown is similar, except that Figure 6 The transflective element in the embodiment includes a semi-reflective and semi-transmissive film 421 and a second polarizing plate (P polarizing plate 422). Figure 4 The transflective element in the illustrated embodiment is a transflective P-S polarizer 221. The image generation unit 410, curved mirror 430, and diffusion element 440 have the same functions as the image generation unit 210, curved mirror 230, and diffusion element 240 in the above-mentioned embodiment, and are not described in detail here.

[0078] The P polarizer 422 can transmit P polarized light, but cannot transmit (is absorbed by) S polarized light. The semi-reflective and semi-transmissive film 421 can transmit part of the light and reflect part of the light.

[0079] In the display device provided in this embodiment, after the imaging light transmitted by the diffusion element 440 is filtered by the first polarizer (S polarizer 441), the S polarized light (polarization direction is perpendicular to the paper surface) in the imaging light is filtered out, so that the S polarized light is transmitted to the semi-reflective semi-transparent membrane 421. The semi-reflective semi-transparent membrane 421 reflects part of the S polarized light to the 1 / 4 wave plate 450, and the 1 / 4 wave plate 450 performs a first phase delay on the incident S polarized light, and the S polarized light becomes circularly polarized light or elliptically polarized light. The semi-reflective semi-transparent membrane 421 transmits part of the S polarized light to the P polarizer 422. This part of the S polarized light cannot pass through the P polarizer 422, and is therefore absorbed by the P polarizer 422.

[0080] The curved mirror 430 reflects the polarized light with the first phase delay, that is, the reflected polarized light enters the 1 / 4 wave plate 450 again, and the 1 / 4 wave plate 450 performs a second phase delay on the polarized light reflected by the curved mirror 430, so that the circularly polarized light or the elliptically polarized light becomes P polarized light (the polarization direction is parallel to the paper surface). After the two phase delays of the above-mentioned 1 / 4 wave plate 450, the incident S polarized light becomes P polarized light and is emitted. The P polarized light can be transmitted from the semi-reflective and semi-transmissive film 421 and the P polarizer 422 to the human eye, and the human eye can see the magnified virtual image.

[0081] and Figure 4 compared to, Figure 6 The display device shown achieves the function of the P-reflective S-polarizer 221 through the semi-reflective semi-transparent film 421 and the P-polarizer 422, and the semi-reflective semi-transparent film 421 and the P-polarizer 422 can be made into a large area with relatively low cost.

[0082] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0083] Figure 7 The display device and Figure 5 The display device shown is similar, except that Figure 7The transflective element in the embodiment is a semi-reflective and semi-transmissive film 521 and a second polarizer (S polarizer 522). Figure 5 The transflective element of the embodiment is a transflective S-P polarizer 321. The image generation unit 510, curved mirror 530, and diffusion element 540 have the same functions as the image generation unit 310, curved mirror 330, and diffusion element 340 in the above embodiment, and are not described again.

[0084] The S polarizer 522 can transmit S polarized light, but cannot transmit (is absorbed by) P polarized light, and can also be called a transmissive S polarizer. The semi-reflective and semi-transmissive film 521 can transmit part of the light and reflect part of the light.

[0085] In the display device provided in this embodiment, after the imaging light transmitted by the diffusion element 540 is filtered by the first polarizer (P polarizer 541), the P polarized light (polarization direction is perpendicular to the paper surface) in the imaging light is filtered out, so that the P polarized light is transmitted to the semi-reflective semi-transparent membrane 521. The semi-reflective semi-transparent membrane 521 reflects part of the P polarized light to the 1 / 4 wave plate 550, and the 1 / 4 wave plate 550 performs a first phase delay on the incident P polarized light, and the P polarized light becomes circularly polarized light or elliptically polarized light. The semi-reflective semi-transparent membrane 521 transmits part of the P polarized light to the S polarizer 522. This part of the S polarized light cannot pass through the S polarizer 522, and is therefore absorbed by the S polarizer 522.

[0086] The curved mirror 530 reflects the polarized light with the first phase delay, that is, the reflected polarized light enters the 1 / 4 wave plate 550 again, and the 1 / 4 wave plate 550 performs a second phase delay on the polarized light reflected by the curved mirror 530, so that the circularly polarized light or the elliptically polarized light becomes S polarized light (the polarization direction is parallel to the paper surface). After the two phase delays of the above-mentioned 1 / 4 wave plate 550, the incident P polarized light becomes S polarized light and is emitted. The S polarized light can be transmitted from the semi-reflective and semi-transparent film 521 and the S polarizer 522 to the human eye, and the human eye can see the magnified virtual image.

[0087] and Figure 5 compared to, Figure 7 The display device shown achieves the function of the S-reflective P-polarizer 321 through the semi-reflective semi-transmissive film 521 and the S-polarizer 522 , and the semi-reflective semi-transmissive film 521 and the S-polarizer 522 can be made into a large area with relatively low cost.

[0088] Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0089] like Figure 8As shown, the display device includes an image generating unit 610, a transflective element, a curved mirror 630, a diffusion element 640, a first polarization conversion device (a quarter wave plate 650 in this embodiment), a third polarization conversion device (a quarter wave plate 642 in this embodiment) and a first polarizer (an S polarizer 641 in this embodiment). The transflective element includes a semi-reflective and semi-transmissive film 621, a second polarization conversion device (a quarter wave plate 622 in this embodiment) and a second polarizer (a P polarizer 623) in this embodiment.

[0090] The image generating unit 610 , the curved mirror 630 , and the diffusion element 640 have the same functions as the image generating unit 110 , the curved mirror 130 , and the diffusion element 140 in the above-mentioned embodiment, and are not described in detail here.

[0091] The S polarizer 641 can transmit S polarized light, but cannot transmit P polarized light (P polarized light is absorbed). The P polarizer 623 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).

[0092] The quarter wave plate 650 is located on the optical path between the semi-reflective and semi-transmissive membrane 621 and the curved mirror 630 , and is used to change the polarization direction of the imaging light reflected from the semi-reflective and semi-transmissive membrane 621 and the polarization direction of the imaging light reflected from the curved mirror 630 .

[0093] The quarter wave plate 642 is located on the optical path between the S polarizer 641 and the semi-reflective and semi-transmissive film 621 , and is used to change the polarization direction of the imaging light transmitted by the S polarizer 641 .

[0094] The quarter wave plate 622 is located on the optical path between the semi-reflective and semi-transmissive film 621 and the P polarizing plate 623 , and is used to change the polarization direction of the imaging light transmitted from the semi-reflective and semi-transmissive film 621 .

[0095] In the display device provided in this embodiment, the imaging light transmitted by the diffusion element 640 is filtered by the S polarizer 641, and the S polarized light in the imaging light is filtered out. After the S polarized light is transmitted through the 1 / 4 wave plate 642, the polarization direction of the light is changed. In this embodiment, the S polarized light is converted into left-handed circularly polarized light or elliptically polarized light (referred to as left-handed polarized light) and emitted.

[0096] The left-handed polarized light is reflected and transmitted by the semi-reflective and semi-transparent membrane 621, and the transmitted part of the light changes its polarization direction again through the 1 / 4 wave plate 650. In this embodiment, the left-handed circularly polarized light is converted into S-polarized light and emitted. The S-polarized light cannot pass through the P polarizer 623, that is, it is absorbed by the P polarizer 623. The other part of the left-handed polarized light (left-handed polarized light) reflected by the semi-reflective and semi-transparent membrane 621 passes through the 1 / 4 wave plate 650 and changes its polarization direction again. In this embodiment, the left-handed polarized light is converted into linear polarized light (for example, S-polarized light) and emitted. After the linear polarized light is reflected by the curved mirror 630, it is transmitted through the 1 / 4 wave plate 650 again. At this time, the linear polarized light becomes right-handed polarized light after passing through the 1 / 4 wave plate 650. The effect of the left-handed polarized light passing through the 1 / 4 wave plate 650 twice is equivalent to passing through the 1 / 2 wave plate once.

[0097] Part of the right-handed polarized light transmitted by the semi-reflective and semi-transmissive film 621 changes its polarization direction again through the 1 / 4 wave plate 622. In this embodiment, the right-handed polarized light becomes P polarized light after passing through the 1 / 4 wave plate 622, and the P polarized light can pass through the P polarizing plate 623 (the polarization direction is parallel to the paper surface), and the transmitted P polarized light enters the human eye, and the human eye can see the magnified virtual image.

[0098] Fig. 9 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0099] like Fig. 9 As shown, the display device includes an image generating unit 710, a transflective element, a curved mirror 730, a diffusion element 740, a first polarization conversion device (a quarter wave plate 750 in this embodiment), a third polarization conversion device (a quarter wave plate 770 in this embodiment) and a first polarizer (a P polarizer 741 in this embodiment). The transflective element includes a semi-reflective and semi-transmissive film 721, a second polarization conversion device (a quarter wave plate 722 in this embodiment) and a second polarizer (S polarizer 723) in this embodiment.

[0100] The image generating unit 710 , the curved mirror 730 , and the diffusion element 740 have the same functions as the image generating unit 110 , the curved mirror 130 , and the diffusion element 140 in the above-mentioned embodiment, and are not described in detail here.

[0101] The S polarizer 723 can transmit S polarized light, but cannot transmit P polarized light (P polarized light is absorbed). The P polarizer 741 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).

[0102] The quarter wave plate 750 is located on the optical path between the semi-reflective and semi-transmissive membrane 721 and the curved mirror 730 , and is used to change the polarization direction of the imaging light reflected from the semi-reflective and semi-transmissive membrane 721 and the polarization direction of the imaging light reflected from the curved mirror 730 .

[0103] The quarter wave plate 742 is located on the optical path between the P polarizer 741 and the semi-reflective and semi-transmissive film 721 , and is used to change the polarization direction of the imaging light transmitted by the S polarizer 741 .

[0104] The quarter wave plate 722 is located on the optical path between the semi-reflective and semi-transmissive film 721 and the S polarizing plate 723 , and is used to change the polarization direction of the imaging light transmitted from the semi-reflective and semi-transmissive film 721 .

[0105] In the display device provided in this embodiment, the imaging light transmitted by the diffusion element 740 is filtered by the P polarizer 741, and the P polarized light in the imaging light is filtered out. After the P polarized light is transmitted through the 1 / 4 wave plate 742, the polarization direction of the light is changed. In this embodiment, the S polarized light is converted into right-handed circularly polarized light or elliptically polarized light (referred to as right-handed polarized light) and emitted.

[0106] The left-handed polarized light is reflected and transmitted by the semi-reflective and semi-transparent membrane 721, and the transmitted part of the light changes its polarization direction again through the 1 / 4 wave plate 750. In this embodiment, the left-handed circularly polarized light is converted into S-polarized light and emitted. The S-polarized light cannot pass through the P polarizer 723, that is, it is absorbed by the P polarizer 723. The other part of the left-handed polarized light (left-handed polarized light) reflected by the semi-reflective and semi-transparent membrane 721 changes its polarization direction again through the 1 / 4 wave plate 750. In this embodiment, the left-handed polarized light is converted into linear polarized light (for example, P polarized light) and emitted. After the linear polarized light is reflected by the curved mirror 730, it is transmitted through the 1 / 4 wave plate 750 again. At this time, the linear polarized light becomes right-handed polarized light after transmitting the 1 / 4 wave plate 750. The effect of the left-handed polarized light passing through the 1 / 4 wave plate 750 twice is equivalent to passing through the 1 / 2 wave plate once.

[0107] Part of the right-handed polarized light transmitted by the semi-reflective and semi-transmissive film 721 changes its polarization direction again through the 1 / 4 wave plate 722. In this embodiment, the right-handed polarized light becomes P polarized light after passing through the 1 / 4 wave plate 722, and the P polarized light can pass through the P polarizing plate 723 (the polarization direction is parallel to the paper surface), and the transmitted P polarized light is incident on the human eye, and the human eye can see the magnified virtual image.

[0108] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0109] like Fig.10 As shown, the display device includes an image generating unit 810, a transflective element, a curved mirror 830, a diffusion element 840, a first polarization conversion device (a quarter wave plate 850 in this embodiment), a third polarization conversion device (a quarter wave plate 842 in this embodiment) and a first polarizer (an S polarizer 841 in this embodiment). The transflective element includes a transflective S-reflective P polarizing film 821 in this embodiment.

[0110] The image generating unit 810 , the curved mirror 830 , and the diffusion element 840 have the same functions as the image generating unit 610 , the curved mirror 630 , and the diffusion element 640 in the above-mentioned embodiment, and are not described in detail here.

[0111] The S polarizer 841 can transmit S polarized light, but cannot transmit P polarized light (P polarized light is absorbed).

[0112] The S-transmissive and P-reflective polarization film 821 can transmit S-polarized light and reflect P-polarized light.

[0113] The 1 / 4 wave plate 850 is located on the optical path between the S-reflective P polarizing film 821 and the curved mirror 830, and is used to change the polarization direction of the imaging light reflected from the S-reflective P polarizing film 821 and the polarization direction of the imaging light reflected from the curved mirror 830. In addition, the 1 / 4 wave plate 850 is also located on the optical path between the 1 / 4 wave plate 842 and the S-reflective P polarizing film 821, and is used to change the polarization direction of the imaging light incident from the 1 / 4 wave plate 842.

[0114] The 1 / 4 wave plate 842 is located on the optical path between the S polarizer 841 and the 1 / 4 wave plate 850 , and is used to change the polarization direction of the imaging light transmitted by the S polarizer 841 .

[0115] In the display device provided in this embodiment, the imaging light transmitted by the diffusion element 840 is filtered by the S polarizer 841, and the S polarized light in the imaging light is filtered out. After the S polarized light is transmitted through the 1 / 4 wave plate 842, the polarization direction of the light is changed. In this embodiment, the S polarized light is converted into left-handed circularly polarized light or elliptically polarized light (referred to as left-handed polarized light) and emitted.

[0116] The left-handed polarized light changes its polarization direction after passing through the quarter wave plate 850. In this embodiment, the left-handed polarized light is converted into P-polarized light and then reflected by the S-reflective P polarization film 821 and passes through the quarter wave plate 850 again, transmitting the right-handed polarized light.

[0117] After being reflected by the curved mirror 830, the right-handed polarized light is transmitted through the 1 / 4 wave plate 850 again. At this time, the right-handed polarized light becomes S polarized light (polarization direction is perpendicular to the paper surface) after being transmitted through the 1 / 4 wave plate 850. The effect of the polarized light passing through the 1 / 4 wave plate 850 twice is equivalent to passing through the 1 / 2 wave plate once. The transmitted S polarized light enters the human eye, and the human eye can see the magnified virtual image.

[0118] and Figure 4-9 Compared with the display device shown in FIG. 1 , the quarter wave plate 850 in the display device provided in this embodiment does not directly cover the curved mirror 830 , but is arranged in parallel with the S-transmitting and P-reflecting polarizing film 821 , which is easier to install and has a lower overall cost.

[0119] In addition, the above-mentioned S-reflective P polarizing film 821 can be used Figure 5 In the embodiment shown, the semi-reflective and semi-transmissive film 521 and the S polarizer 522 are used to realize the above-mentioned specific implementation process, which will not be described in detail here.

[0120] Fig.11 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0121] like Fig.11 As shown, the display device includes an image generating unit 910, a transflective element, a curved mirror 930, a diffusion element 940, a first polarization conversion device (a quarter wave plate 950 in this embodiment), a third polarization conversion device (a quarter wave plate 942 in this embodiment) and a first polarizer (a P polarizer 941 in this embodiment). The transflective element includes a transflective P-reflective S polarizing film 921 in this embodiment.

[0122] Among them, the image generating unit 910, the curved mirror 930, and the diffusion element 940 have the same functions as the image generating unit 810, the curved mirror 830, and the diffusion element 840 in the above-mentioned embodiment, and are not described in detail here.

[0123] The P polarizing plate 941 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).

[0124] The P-reflective S polarizing film 921 can transmit P polarized light and reflect S polarized light. The P-reflective S polarizing film 921 can be arranged in parallel with the 1 / 4 wave plate 950 .

[0125] The 1 / 4 wave plate 950 is located on the optical path between the transparent P-reflective S polarizing film 921 and the curved mirror 930, and is used to change the polarization direction of the imaging light reflected from the transparent P-reflective S polarizing film 921 and the polarization direction of the imaging light reflected from the curved mirror 930. In addition, the 1 / 4 wave plate 950 is also located on the optical path between the 1 / 4 wave plate 942 and the transparent P-reflective S polarizing film 921, and is used to change the polarization direction of the imaging light incident from the 1 / 4 wave plate 942.

[0126] The 1 / 4 wave plate 942 is located on the optical path between the P polarizing plate 941 and the 1 / 4 wave plate 950 , and is used to change the polarization direction of the imaging light transmitted by the P polarizing plate 941 .

[0127] In the display device provided in this embodiment, the imaging light transmitted by the diffusion element 940 is filtered by the P polarizer 941, and the P polarized light in the imaging light is filtered out. After the P polarized light is transmitted through the 1 / 4 wave plate 942, the polarization direction of the light is changed. In this embodiment, the P polarized light is converted into right-handed circularly polarized light or elliptically polarized light (referred to as right-handed polarized light) and emitted.

[0128] The right-handed polarized light changes its polarization direction after passing through the quarter wave plate 950. In this embodiment, the right-handed polarized light is converted into S-polarized light and then reflected by the P-reflective S-polarizing film 921 and passes through the quarter wave plate 950 again, and is transmitted as left-handed polarized light.

[0129] After being reflected by the curved mirror 930, the left-handed polarized light is transmitted through the 1 / 4 wave plate 950 again. At this time, the left-handed polarized light becomes P polarized light (polarization direction is parallel to the paper surface) after being transmitted through the 1 / 4 wave plate 950. The effect of the polarized light passing through the 1 / 4 wave plate 950 twice is equivalent to passing through the 1 / 2 wave plate once. The transmitted P polarized light enters the human eye, and the human eye can see the magnified virtual image.

[0130] In addition, the above-mentioned P-reflective S polarizing film 921 can be Figure 6 The display device shown is implemented by a semi-reflective and semi-transmissive film 421 and a P polarizing plate 422. The specific implementation process is referred to the above embodiment and will not be repeated here.

[0131] In the above embodiments provided in the present application, the polarizer may be referred to as a polarizer, a polarizer, a polarizing film or a polarizing device. For example, a P polarizer may be referred to as a P polarizing film, and a transmissive S-reflective P polarizer may be referred to as a transmissive S-reflective P polarizer.

[0132] refer to Fig.12 , Fig.12 is a circuit diagram of a display device provided in an embodiment of the present application.

[0133] like Fig.12 As shown, the circuit in the display device mainly includes a processor 1001, a memory 1002, a controller area network (CAN) transceiver 1003, an audio module 1004, a video module 1005, a power module 1006, a wireless communication module 1007, an I / O interface 1008, a video interface 1009, a touch unit 1010, a display circuit 1028 and an imaging device 1029. Among them, the processor 1001 and its peripheral components, such as the memory 1002, the CAN transceiver 1003, the audio module 1004, the video module 1005, the power module 1006, the wireless communication module 1007, the I / O interface 1008, the video interface 1009, the touch unit 1010, and the display circuit 1028 can be connected through a bus. The processor 1001 can be called a front-end processor.

[0134] In addition, the circuit diagrams shown in the embodiments of the present application do not constitute a specific limitation on the display device. In other embodiments of the present application, the display device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0135] The processor 1001 includes one or more processing units, for example, the processor 1001 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processor (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0136] The processor 1001 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may store instructions or data that the processor 1001 has just used or cyclically used. If the processor 1001 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 1001, and thus improves the efficiency of the system.

[0137] In some embodiments, the display device may further include a plurality of input / output (I / O) interfaces 1008 connected to the processor 1001. The interface 1008 may include, but is not limited to, an Inter-Integrated Circuit (I2C) interface, an Inter-Integrated Circuit Sound (I2S) interface, a Pulse Code Modulation (PCM) interface, a Universal Asynchronous Receiver / Transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a General-Purpose Input / Output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and / or a Universal Serial Bus (USB) interface, etc. The above-mentioned I / O interface 1008 may be connected to devices such as a mouse, a touchpad, a keyboard, a camera, a speaker / speaker, a microphone, etc., and may also be connected to physical buttons on the display device (such as a volume button, a brightness adjustment button, a power button, etc.).

[0138] The memory 1002 may include an internal memory and may also include an external memory (such as a Micro SD card). The memory 1002 may be used to store computer executable program codes, and the executable program codes include instructions. The memory 1002 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a call function, a time setting function, etc.), etc. The data storage area may store data created during the use of the display device (such as a phone book, world time, etc.), etc. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash memory (Universal Flash Storage, UFS), etc. The processor 1001 executes various functional applications and data processing of the display device by running instructions stored in the memory 1002 and / or instructions stored in a memory provided in the processor 1001.

[0139] Furthermore, the display device further includes a CAN transceiver 1003, which can be connected to the CAN bus (CAN BUS) of the car. Through the CAN bus, the display device can communicate with the in-vehicle entertainment system (music, radio, video module), the vehicle status system, etc. For example, the user can turn on the in-vehicle music playback function by operating the display device. The vehicle status system can send vehicle status information (doors, seat belts, etc.) to the display device for display.

[0140] The display device can implement audio functions such as music playing and making calls through the audio module 1004 and the application processor.

[0141] The audio module 1004 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal. The audio module 1004 can also be used to encode and decode audio signals, such as playing or recording. In some embodiments, the audio module 1004 can be arranged in the processor 1001, or some functional modules of the audio module 1004 can be arranged in the processor 1001.

[0142] The video interface 1009 can receive input audio and video, which can be specifically a High Definition Multimedia Interface (HDMI), a Digital Visual Interface (DVI), a Video Graphics Array (VGA), a Display Port (DP), a Low Voltage Differential Signaling (LVDS) interface, etc. The video interface 1009 can also output video externally. For example, the display device receives video data sent by the navigation system through the video interface.

[0143] The video module 1005 can decode the video input by the video interface 1009, for example, by performing H.264 decoding. The video module can also encode the video collected by the display device, for example, by performing H.264 encoding on the video collected by the external camera. In addition, the processor 1001 can also decode the video input by the video interface 1009, and then output the decoded image signal to the display circuit.

[0144] The display circuit 1028 and the imaging device 1029 are used to display the corresponding image. In this embodiment, the video interface 1009 receives the input video data (or video source), and the video module 1005 decodes and / or digitally processes and outputs the image signal to the display circuit 1028. The display circuit 1028 drives the imaging device 1029 to image the light beam emitted by the light source 101 according to the input image signal, thereby generating a visible image. For example, the imaging device 1029 generates a source image and emits imaging light. Among them, the display circuit 1028 and the imaging device 1029 are electronic components in the imaging module 102, and the display circuit 1028 can be called a driving circuit.

[0145] The power module 1006 is used to provide power to the processor 1001 and the light source 101 according to the input power (e.g., direct current), and the power module 1006 may include a rechargeable battery, which can provide power to the processor 1001 and the light source 101. The light emitted by the light source 101 can be transmitted to the imaging device 1029 for imaging, thereby forming an image light signal (imaging light).

[0146] In addition, the power module 1006 can be connected to a power supply module (such as a power battery) of a car, and the power supply module 1006 of the display device is powered by the power supply module of the car.

[0147] The wireless communication module 1007 enables the display device to communicate wirelessly with the outside world, and can provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication technology (NFC), infrared technology (IR) and other wireless communication solutions. The wireless communication module 1007 can be one or more devices integrating at least one communication processing module. The wireless communication module 1007 receives electromagnetic waves via an antenna, modulates the frequency of the electromagnetic wave signal and filters it, and sends the processed signal to the processor 1001. The wireless communication module 1007 can also receive the signal to be sent from the processor 1001, modulate the frequency of it, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0148] In addition, in addition to being input through the video interface 1009, the video data decoded by the video module 1005 can also be wirelessly received through the wireless communication module 1007 or read from the memory 1002. For example, the display device can receive video data from a terminal device or an in-vehicle entertainment system through the wireless local area network in the vehicle, and the display device can also read the audio and video data stored in the memory 1002.

[0149] The touch control unit 1010 can generate a control signal (e.g., a brightness / contrast adjustment signal) according to the user's touch operation on the touch interface, and then send the control signal to the display circuit 1028 through the processor 201. The display circuit 1028 adjusts the imaging of the imaging device 1029 according to the control signal, thereby changing the displayed source image. The touch interface may include control buttons (volume, brightness, contrast adjustment buttons, etc.).

[0150] The curved mirror in the embodiment of the present application can be a multi-focal free-form curved mirror. Multi-person viewing is achieved by designing a multi-focal free-form curved reflector.

[0151] The means of transport in the embodiments of the present application may be known means of transport such as automobiles, airplanes, ships, rockets, etc., and may also be new means of transport that will appear in the future. The automobile may be an electric vehicle, a fuel vehicle, or a hybrid vehicle, for example, a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which is not specifically limited in this application. In addition, the electronic device in the embodiments of the present application includes a device equipped with a display device, which may include the above-mentioned means of transport, and may also be used as a medical device, an office entertainment device, or an industrial control device, which is not limited in this embodiment.

[0152] The terms "first, second, third, and fourth" and the like in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, and it should be understood that the data used in this manner can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order not described in this application. In order to more clearly reflect the relationship between components in different embodiments, this application uses the same figure numbers to represent components with the same or similar functions in different embodiments.

[0153] It should also be noted that, unless otherwise specified, the specific description of some technical features in one embodiment can also be used to explain the corresponding technical features mentioned in other embodiments.

[0154] The same or similar parts between the various embodiments in this application can be referred to each other. The above description is only a specific implementation method of this application, and the protection scope of this application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered within the protection scope of this application.

Claims

1. A display device, characterized in that: include: An image generating unit, configured to generate imaging light containing image information and project the imaging light toward the transflective element; A transflective element, used for reflecting the imaging light to the curved mirror; The curved mirror is used to reflect the received imaging light to the transflective element; The transflective element is also used to transmit the imaging light reflected by the curved mirror.

2. The display device according to claim 1, wherein: The polarization direction of the imaging light reflected by the transflective element is different from the polarization direction of the imaging light transmitted by the transflective element.

3. The display device according to claim 1 or 2, characterized in that: The transflective element comprises a polarizing transflective element, and the polarization direction of the imaging light reflected by the polarizing transflective element and the polarization direction of the imaging light transmitted by the polarizing transflective element are perpendicular to each other.

4. The display device according to claim 1 or 2, characterized in that: The transflective element comprises a polarizing transflective element, the imaging light reflected by the polarizing transflective element is circularly polarized light or elliptically polarized light, and the imaging light transmitted by the polarizing transflective element is linearly polarized light.

5. The display device according to claim 1 or 2, characterized in that: The imaging light reflected by the transflective element is P-polarized light, and the imaging light transmitted by the transflective element is S-polarized light; or, The imaging light reflected by the transflective element is S-polarized light, and the imaging light transmitted by the transflective element is P-polarized light.

6. The display device according to claim 1, wherein: Also includes: A first polarization conversion device is located on the optical path between the transflective element and the curved mirror, and is used to change the polarization direction of the imaging light reflected from the transflective element and / or the polarization direction of the imaging light reflected from the curved mirror.

7. The display device according to claim 6, wherein: The first polarization conversion device is a quarter wave plate.

8. The display device according to claim 1 or 2, characterized in that: Also includes: A diffusion element is located on the optical path between the image generating unit and the transflective element, and is used to diffuse the imaging light projected by the image generating unit.

9. The display device according to claim 8, wherein: A first polarizer is also included which is located on the light exiting side of the diffusion element.

10. The display device according to claim 1, wherein: The transflective element comprises a semi-reflective and semi-transmissive film and a second polarizer; The semi-reflective and semi-transmissive film is used to reflect part of the imaging light to the curved mirror and transmit another part of the imaging light to the second polarizer; The second polarizer is used for absorbing the other part of the incident imaging light and transmitting the imaging light reflected by the curved mirror.

11. The display device according to claim 10, wherein: The imaging light reflected by the semi-reflective and semi-transmissive film is P-polarized light, the imaging light absorbed by the second polarizer is P-polarized light, and the imaging light transmitted is S-polarized light; Alternatively, the imaging light reflected by the semi-reflective and semi-transmissive film is S-polarized light, the imaging light absorbed by the second polarizer is S-polarized light, and the imaging light transmitted by the second polarizer is P-polarized light.

12. The display device according to claim 10 or 11, characterized in that: The semi-reflective and semi-transmissive film and the second polarizer are attached to each other.

13. The display device according to claim 10, wherein: The imaging light reflected by the semi-reflective and semi-transmissive membrane is circularly polarized light or elliptically polarized light, and the imaging light transmitted by the semi-reflective and semi-transmissive membrane is circularly polarized light or elliptically polarized light.

14. The display device according to claim 13, wherein: The transflective element also includes a second polarization conversion device located between the semi-reflective and semi-transparent membrane and the second polarizer, and the second polarization conversion device is used to change the polarization direction of the circularly polarized light or elliptically polarized light transmitted from the semi-reflective and semi-transparent membrane and / or the polarization direction of the circularly polarized light or elliptically polarized light reflected from the curved mirror.

15. The display device according to claim 14, wherein: The second polarization conversion device is a quarter wave plate.

16. The display device according to claim 9, characterized in that It also includes a third polarization conversion device located on the light-emitting side of the first polarizer, and the third polarization conversion device is used to change the polarization direction of the polarized light transmitted from the first polarizer.

17. The display device according to claim 16, wherein: The third polarization conversion device is a quarter wave plate.

18. The display device according to claim 1, wherein: The imaging light projected by the image generating unit is circularly polarized light or elliptically polarized light.

19. The display device according to claim 6, wherein: The first polarization conversion device is also located on the optical path between the transflective element and the image generating unit, and is used to change the polarization direction of the imaging light from the image generating unit.

20. The display device according to claim 19, wherein: The transflective element is arranged in parallel with the first polarization conversion element.

21. The display device according to claim 1, wherein: The transflective component is a coated reflector.

22. The display device according to claim 1 or 2, characterized in that: The curved mirror is a multi-focal curved mirror or a free-form curved mirror.

23. The display device according to claim 1 or 2, characterized in that: The image generation unit includes a light source, an imaging module and a projection lens. The light source is used to output a light beam to the imaging module; The imaging module is used to generate imaging light containing image information according to the light beam; The projection lens is used to project the imaging light toward the transflective element.

24. An electronic device, characterized in that: Comprising a display device as described in any one of claims 1-23.

25. A means of transport, characterized in that: Comprising a display device as described in any one of claims 1-23.

26. The vehicle according to claim 25, characterized in that The display device is installed on a seat of the vehicle.

Images