CN117666132A

CN117666132A - Display method and device and traffic equipment

Info

Publication number: CN117666132A
Application number: CN202211053342.0A
Authority: CN
Inventors: 吴慧军; 徐俊峰
Original assignee: Futurus Technology Co Ltd
Current assignee: Futurus Technology Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2024-03-08

Abstract

The disclosure provides a display method, a display device and traffic equipment, and relates to the technical field of head-up display. Wherein the display device is configured to include a first viewing mode and a second viewing mode, wherein the first viewing mode is configured to cause a user to view at least a first image through an eyebox area of the display device, the first image being an image of first characteristic display light; the second viewing mode is configured to cause a user to view a second image through a light filtering device and the eye-box region, the second image being an image of second characteristic display light having optical characteristics different from the optical characteristics of the first characteristic display light, the light filtering device being configured to filter at least a portion of the first characteristic display light and transmit at least a portion of the second characteristic display light. Through above device, can see the demand that satisfies two kinds of viewing patterns, improve user experience.

Description

Display method and device and traffic equipment

Technical Field

The disclosure relates to the technical field of head-up display, and in particular relates to a display method, a display device and traffic equipment.

Background

A Head Up Display (HUD) projects imaging light onto an imaging window, and a user can directly see an imaging picture formed through the imaging window without lowering the head, thereby bringing better driving experience.

Disclosure of Invention

The disclosure provides a display method, a display device and traffic equipment.

According to a first aspect of the present disclosure, a display device is presented, configured to comprise a first viewing mode and a second viewing mode, wherein the first viewing mode is configured to enable a user to view at least a first image through an eye-box area of the display device, the first image being an image imaged by display light of a first characteristic; the second viewing mode is configured to cause a user to view a second image through a light filtering device and the eye-box region, the second image being an image of second characteristic display light having optical characteristics different from the optical characteristics of the first characteristic display light, the light filtering device being configured to filter at least a portion of the first characteristic display light and transmit at least a portion of the second characteristic display light.

According to a second aspect of the present disclosure, there is provided another display device including: an image source configured to emit image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; and a reflection imaging section configured to reflect the incident image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

According to a third aspect of the present disclosure, a display device is presented, configured to include a first viewing mode and a second viewing mode, the first viewing mode being configured to cause a user to view at least a first image through an eyebox area of the display device, the first image being an image imaged by display light of a first characteristic; the second viewing mode is configured to enable a user to view a second image through the light filtering device and the eye box region, the second image being an image of second characteristic display light, the imaging distances of the first image and the second image being greater than a preset threshold, the preset threshold being determined according to a height deviation between the first image and the second image and a human eye resolution.

According to a fourth aspect of the present disclosure, a head-up display is presented, comprising a display device of any one of the embodiments of the present disclosure.

According to a fifth aspect of the present disclosure, there is provided a display method including: in a first viewing mode, at least a first image is viewed through an eye-box region of the display device, the first image being an image of first characteristic display light; in a second viewing mode, a second image is viewed through a light filtering device and an eye-box region of the display device, the second image being an image of second characteristic display light having optical characteristics different from those of the first characteristic display light, the light filtering device being configured to filter at least part of the first characteristic display light and transmit at least part of the second characteristic display light.

According to a sixth aspect of the present disclosure, there is provided a method of improving ghost phenomenon, comprising: making the image light emitted by the image source incident on the amplifying element; and reflecting the image light processed by the amplifying element through a reflection imaging part to form a first image and a second image, wherein the imaging distance of the first image and the second image is not smaller than a preset threshold, and the preset threshold is a value related to the height deviation between the first image and the second image and the resolution of human eyes.

According to a seventh aspect of the present disclosure, there is provided an apparatus for improving ghost phenomenon, comprising: the image source, the amplifying element and the reflection imaging part, wherein the amplifying element processes the image light emitted by the image source, the processed image light is reflected by the reflection imaging part to form a first image and a second image, the imaging distance between the first image and the second image is not smaller than a preset threshold, and the preset threshold is a value related to the height deviation between the first image and the second image and the resolution of human eyes.

According to an eighth aspect of the present disclosure, there is provided a traffic device comprising: the display device as described above in the present disclosure, or the head-up display as described above in the present disclosure.

According to any of the above aspects of the present disclosure, in some embodiments, the first characteristic display light and the second characteristic display light are incident to the eyebox area simultaneously.

According to any of the above aspects of the disclosure, in some embodiments, the first viewing mode is configured to cause a user to view only a first image through the eyebox area, or the first viewing mode is configured to cause a user to view a first image and a second image through the eyebox area, and the first image has a greater visibility than the second image; and/or the second viewing mode is configured to enable a user to view only the second image through the light filtering device and the eyebox area.

According to any of the above aspects of the present disclosure, in some embodiments, the display device includes: an image source configured to emit image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; and a reflection imaging section configured to reflect the incident image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

According to any of the above aspects of the present disclosure, in some embodiments, in a sum of the energies of the first characteristic display light and the second characteristic display light, an energy duty cycle of the second characteristic display light is smaller than an energy duty cycle of the first characteristic display light; and/or the energy ratio of the second characteristic image light in the image light is smaller than the energy ratio of the first characteristic image light in the image light.

According to any of the above aspects of the present disclosure, in some embodiments, the energy ratio of the second characteristic image light in the image light is greater than or equal to 10% and less than 50%.

According to any one of the above aspects of the present disclosure, in some embodiments, the reflective imaging section includes a main body section, and at least one first reflective film disposed at the main body section; the first reflective film is configured to have a reflectance for the second characteristic image light that is greater than a reflectance for the first characteristic image light, and/or the first reflective film is configured to have a transmittance for the second characteristic image light that is less than a transmittance for the first characteristic image light.

According to any one of the above aspects of the present disclosure, in some embodiments, the main body portion includes a first transparent substrate and a second transparent substrate including first to fourth surfaces sequentially disposed in an incident direction of the image light, wherein the first surface is a surface closest to the eyebox area among the first to fourth surfaces; the first reflective film is disposed on at least one of the second to fourth surfaces.

According to any of the above aspects of the present disclosure, in some embodiments, the first reflective film is disposed on a second surface, and/or a third surface, of the first to fourth surfaces.

According to any of the above aspects of the present disclosure, in some embodiments, the total transmittance of the first reflective film is greater than or equal to 70%; and/or the reflectivity of the first reflective film to the second characteristic image light is greater than or equal to 5%, or the reflectivity of the first reflective film to the second characteristic image light is 10% -15%; and/or the incidence angle of the image light to the reflection imaging part is 35-70 degrees.

According to any of the above aspects of the present disclosure, in some embodiments, the reflective imaging section further includes: an intermediate layer disposed between the first transparent substrate and the second transparent substrate; the intermediate layer is wedge-shaped, and/or at least one of the first transparent substrate and the second transparent substrate is wedge-shaped.

According to any of the above aspects of the present disclosure, in some embodiments, the intermediate layer is a thermoplastic polymer film layer.

According to any of the above aspects of the present disclosure, in some embodiments, an imaging distance of the first image and the second image of the display device is not less than a preset threshold; and/or the first characteristic display light is S polarized light and the second characteristic display light is P polarized light; and/or the first characteristic display light is light in a first wavelength range, and the second characteristic display light is light in a second wavelength range.

According to any of the above aspects of the disclosure, in some embodiments, the preset threshold is a value related to a height deviation between the first image and the second image and a resolution of a human eye.

According to any one of the above aspects of the present disclosure, in some embodiments, the first reflective film is a laminated structure composed of a plurality of refractive index layers including a first refractive index layer and a second refractive index layer, the first refractive index layer having a refractive index higher than that of the second refractive index layer.

According to any of the above aspects of the disclosure, in some embodiments, the first refractive index layer has a geometric thickness of 50nm to 100nm and the second refractive index layer has a geometric thickness of 80nm to 120nm.

The first characteristic display light is S polarized light, and the second characteristic display light is P polarized light; and/or the first characteristic display light is light in a first wavelength range and the second characteristic display light is light in a second wavelength range.

According to any of the above aspects of the disclosure, in some embodiments, the preset threshold is a ratio of a height deviation between the first image and the second image to a resolution of a human eye.

According to any of the above aspects of the present disclosure, in some embodiments, the display device further includes: and an amplifying element provided between the image source and the reflective imaging section and configured to amplify the image light before the image light is incident on the reflective imaging section.

Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a block diagram of a display device according to some embodiments of the present disclosure;

fig. 2 is a schematic structural view of a display device according to some embodiments of the present disclosure;

FIG. 3 is a schematic diagram of a reflective imaging section according to some embodiments of the present disclosure;

FIG. 4 is a schematic view of a reflective imaging section according to further embodiments of the present disclosure;

FIG. 5 is a schematic diagram of a reflective imaging section according to still further embodiments of the present disclosure;

FIG. 6 is a schematic structural view of a reflective imaging section according to still further embodiments of the present disclosure;

FIG. 7 is a schematic diagram of a reflective imaging section according to still further embodiments of the present disclosure;

FIG. 8 is a schematic structural view of a first reflective film in accordance with some embodiments of the present disclosure;

FIG. 9 is a schematic structural view of a traffic device according to some embodiments of the present disclosure;

Fig. 10 is a flow chart of a display method according to some embodiments of the present disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In this disclosure, when a particular element is described as being located between a first element and a second element, there may or may not be intervening elements between the particular element and the first element or the second element. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without intervening components, or may also be directly connected to the other components without intervening components.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

The inventors of the present disclosure noted that, when a user wears polarized sunglasses, the polarized sunglasses have a filtering effect on the vertically polarized light, so that the user cannot view an imaging picture formed through the imaging window, thereby reducing the use experience of the user.

Alternatively, in another application scenario, the reflective film of the imaging window is used to reflect light in a specific wavelength range. When a user wears a certain device, the device filters light in the specific wavelength range, so that the user cannot watch an imaging picture formed through the imaging window, and the use experience of the user is reduced.

In view of this, the present disclosure proposes a display method, apparatus, and traffic device, and some embodiments can satisfy the needs of at least two viewing modes, and improve user experience.

According to a first aspect of the present disclosure, a display device is provided. In some embodiments of the present disclosure, a display device is configured to include a first viewing mode and a second viewing mode.

The first viewing mode is configured to cause a user to view at least a first image through an eyebox area (also referred to as a viewing area) of the display device. Wherein the first image is an image of the first characteristic display light.

The second viewing mode is configured to enable a user to view a second image through the light filtering device and the eyebox area. The second image is an image formed by the second characteristic display light, and the optical characteristic of the second characteristic display light is different from that of the first characteristic display light. Wherein the light filtering means is configured to filter at least part of the first characteristic display light and to transmit at least part of the second characteristic display light.

In some embodiments, the first characteristic display light and the second characteristic display light are light of different polarization characteristics. For example, the first characteristic display light is vertically polarized light (S polarized light), and the second characteristic display light is parallel polarized light (P polarized light). In these embodiments, the user may see at least a first image formed by light of a first polarization characteristic through a first viewing mode without the use of light filtering means (such as polarized sunglasses, or filtering means such as glass plates, lenses, etc. that filter light of some wavelengths); when a user uses a light filtering device (such as polarized sunglasses or a filtering device such as a glass plate or a lens with a filtering effect on P polarized light), the user can see a second image formed by the light with the second polarization characteristic through a second viewing mode, so that the viewing requirements of the user in different states can be met.

In some embodiments, the first characteristic display light and the second characteristic display light are light in different wavelength ranges. For example, the first characteristic display light is light in a first wavelength range, and the second characteristic display light is light in a second wavelength range, the first wavelength range being different from the second wavelength range. In these embodiments, the user may see at least the first image formed by light in the first wavelength range without using a light filtering device (such as glasses that filter light in the first wavelength range); when a user uses the light filtering device (such as glasses for filtering light in the first wavelength range), the user can see the second image formed by the light in the second wavelength range, so that the requirement of the user on multiple viewing modes can be met.

In some embodiments, the first viewing mode is configured to cause a user to view only the first image through the eyebox area, or the first viewing mode is configured to cause a user to view the first image and the second image through the eyebox area with the first image having a greater visibility than the second image. Wherein the visibility can take various measures. Such as light brightness or intensity, etc.

The foregoing "enabling the user to see only" the first image may be understood as that in the first viewing mode, the user perceives only the first image, for example, even if the first characteristic display light of the first image and the second characteristic display light of the second image are both incident on the eyes of the user, the user perceives only the first image because the second image of the second characteristic display light is weaker, and by enabling the user to see only the first image in the first viewing mode, no or little ghost is caused in the first viewing mode, and the viewing definition is not sufficiently affected, so that the viewing experience is better.

Alternatively, the first image is made more visible than the second image, so that the ghost problem when the first image and the second image exist simultaneously can be eliminated or alleviated.

The second viewing mode is configured to allow a user to view only the second image through the light filtering means and the eyebox area, thus ensuring that the user is able to see the second image without creating ghosts, resulting in a better viewing experience.

In some embodiments, the first characteristic display light and the second characteristic display light are incident to the eye-box region simultaneously. In these embodiments, the imaging screen can be seen regardless of whether the user is currently wearing the light filtering device or not wearing the light filtering device. Moreover, as the two characteristic display lights are simultaneously incident into the eye box area, a user can meet the requirements of the user on various viewing modes without any additional viewing mode switching action according to the state of the user, and the user experience is improved.

In some embodiments, to reduce ghosting in the first viewing mode, the energy duty cycle of the second characteristic display light is less than the energy duty cycle of the first characteristic display light in the sum of the energies of the first characteristic display light and the second characteristic display light. In the embodiments of the present disclosure, energy should be understood in a broad sense, which may be specifically luminous flux, light intensity or brightness, and the like. For example, the light intensity ratio of the first characteristic display light is set to be greater than 50% and less than 90%, and the light intensity ratio of the second characteristic display light is set to be greater than or equal to 10% and less than 50%.

By enabling the energy ratio of the first characteristic display light to be larger than that of the second characteristic display light, when the first characteristic display light and the second characteristic display light are simultaneously incident into the eye box area, a user can hardly perceive the second image in the first viewing mode, so that the problem of double image possibly caused by imaging deviation of the first image and the second image is relieved, and user experience is improved.

In the embodiment of the disclosure, through the display device, the requirements of users on multiple viewing modes can be met, and the user experience is improved. Further, by making the energy ratio of the first characteristic display light larger than that of the second characteristic display light, the problem of double image possibly caused by imaging deviation of the first image and the second image can be relieved, and user experience is further improved.

According to some embodiments of the present disclosure, there is also provided a display device. As shown in fig. 1 and 2, the display device of the embodiment of the present disclosure includes a reflective imaging section 100 and an image source 200.

The image source 200 is configured to emit image light. Wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics.

A reflective imaging section 100 configured to reflect incident image light L ₁ Reflecting to emit first characteristic display light L corresponding to the first characteristic image light ₂ Second characteristic display light L corresponding to the second characteristic image light ₃ And, display light L by a first characteristic ₂ Forming a first image S1 and displaying light L by a second characteristic ₃ A second image S2 is formed. In fig. 2, the first image S1 is represented by a thicker line, and the second image S2 is represented by a thinner line.

In some embodiments, the first characteristic image light and the second characteristic image light are light of different polarization states. For example, the first characteristic image light is vertically polarized light, and the second characteristic image light is parallel polarized light. Accordingly, the first characteristic display light is vertically polarized light, and the second characteristic display light is horizontally polarized light. In these embodiments, the image light may be light containing two polarization characteristics. For example, the image light may be elliptical polarized light, circular polarized light, natural light, or the like, or two or more kinds of image sources 200 may be provided to generate image light having different characteristics, respectively.

In some of the above embodiments, the requirement of the user for multiple viewing modes can be satisfied by making the image light include light of two polarization characteristics and making the light reflected by the reflective imaging section include light of two polarization characteristics. For example, in a first viewing mode, the user may see an imaged picture (i.e., a first image) formed by vertically polarized light without wearing polarized sunglasses; in the second viewing mode, the user wears polarized sunglasses with filtering effect on the vertically polarized light, and can see the imaging picture (namely the second image) formed by the parallel polarized light.

In other embodiments, the first characteristic image light and the second characteristic image light are light of different wavelength ranges. For example, the first characteristic image light is light in a first wavelength range, and the second characteristic image light is light in a second wavelength range. Accordingly, the first characteristic display light is light in the first wavelength range, and the second characteristic display light is light in the second wavelength range. In these embodiments, the image light may be a mixed light including the first wavelength range and the second wavelength range.

In the above-described other embodiments, the user's requirement for multiple viewing modes can be satisfied by making the image light include light in two wavelength ranges and making the light reflected by the reflective imaging section include light in two wavelength ranges. For example, in the first viewing mode, the user may see an imaged picture formed by light in the first wavelength range without wearing glasses that filter light in the first wavelength range; in the second viewing mode, the user wears glasses having a filtering effect on light in the first wavelength range, and can see an imaging picture formed by light in the second wavelength range.

In some embodiments, the image light satisfies: the energy ratio of the second characteristic image light in the image light is smaller than the energy ratio of the first characteristic image light in the image light; and/or, the display light forming the imaging screen satisfies: in the energy sum of the first characteristic display light and the second characteristic display light, the energy ratio of the second characteristic display light is smaller than the energy ratio of the first characteristic display light. In which the energy is to be understood in a broad sense, which may be in particular luminous flux, light intensity or brightness, etc.

In some embodiments, the energy ratio of the second characteristic image light in the image light is greater than or equal to 10% and less than 50%. For example, the second characteristic is made to show a light intensity ratio of 10%, 15%, 20%, 30%, 40%, or the like.

In the embodiment of the disclosure, by making the energy ratio of the first characteristic display light larger than that of the second characteristic display light, when the first characteristic display light and the second characteristic display light are simultaneously incident to the eye box area, the user can hardly perceive the second image in the first viewing mode, so that the ghost problem possibly caused by imaging deviation of the first image and the second image is relieved, and the user experience is improved.

In some embodiments, the reflective imaging section 100 includes: the reflective film comprises a main body part and at least one first reflective film arranged on the main body part. Wherein the first reflective film is configured to have a higher reflectivity for the second characteristic image light than for the first characteristic image light, and/or the first reflective film is configured to have a lower transmissivity for the second characteristic image light than for the first characteristic image light.

In general, when the reflective imaging section is not provided with the first reflective film, the reflected light is mainly the first characteristic display light. When the user wears the light filtering device having a filtering effect on the first characteristic display light, there is a problem that an imaging screen formed by the reflected light cannot be seen.

In the embodiment of the disclosure, at least one first reflective film is disposed on the main body of the reflective imaging portion, so that light reflected by the reflective imaging portion includes both first characteristic image light and second characteristic image light, and thus, a user who does not wear the light filtering device and a user who wears the light filtering device can both see an imaging picture, and user experience is improved.

The reflectivity of the first reflective film to the second characteristic image light is greater than or equal to 5%, and the reflectivity of the first reflective film to the second characteristic image light is greater than a preset value, so that the reflected light formed by reflecting the first characteristic image light and the second characteristic image light contains a certain amount of second characteristic display light while the reflected light contains the first characteristic display light, and a user wearing polarized glasses can see a relatively clear imaging picture.

In some embodiments, when the first characteristic image light and the second characteristic image light are light of different polarization states, the first reflective film has a reflectivity for the second polarized characteristic image light that is greater than a reflectivity for the first polarized characteristic image light, and/or the first reflective film has a transmissivity for the second polarized characteristic image light that is less than a transmissivity for the first polarized image light. For example, the first polarization characteristic image light is vertically polarized light, and the second polarization characteristic image light is parallel polarized light.

In some embodiments, the first reflective film has a reflectivity of greater than or equal to 5% for the second polarization characteristic image light. For example, the reflectivity of the first reflective film to the image light with the second polarization characteristic is 10% -15%, the first reflective film with the reflectivity is easier to process and produce, the cost is lower, the visibility of the second image in the second viewing mode can be ensured to be better, the viewing requirement can be met, and the power consumption of an image source can be reduced.

Of course, in other embodiments, the reflectivity of the first reflective film to the second polarization characteristic image light may be 15% to 20%,20% to 25%,25% to 30%, 30% to 35%, or the like.

In some embodiments, when the first characteristic image light and the second characteristic image light are different wavelengths of light, the first reflective film has a greater reflectivity for the second wavelength range of image light than for the first wavelength range of image light, and/or the first reflective film has a smaller transmissivity for the second wavelength range of image light than for the first wavelength range of image light.

In some embodiments, the first reflective film has a reflectivity of greater than or equal to 5% for image light in the second wavelength range. For example, the first reflective film has a reflectivity of 10% to 15% for image light in the second wavelength range, and the first reflective film is easier to process and produce, has lower cost, can ensure better visibility of the second image in the second viewing mode, can meet the viewing requirement, and is beneficial to reducing the power consumption of the image source.

Of course, in other embodiments, the first reflective film is in the second wavelength range. The reflectivity of the image light can be 15% -20%, 20% -25%, 25% -30% or 30% -35% and the like.

In some embodiments, the image light is incident on the reflective imaging section at an angle of incidence of 35 ° to 70 °. By making the image light incident to the reflective imaging section at an angle within a preset range, on the one hand, it is helpful to make more first-characteristic image light reflected when incident to the first surface of the reflective imaging section, to improve the brightness of an imaging screen formed based on the first-characteristic display light, and on the other hand, it is helpful to alleviate the ghost problem that may be caused by the reflection of the first-characteristic image light at a different surface of the reflective imaging section.

In some embodiments, the total transmittance of the first reflective film is greater than or equal to 70%. By making the total transmittance of the first reflective film larger than a preset value, a user can see enough external environment light through the reflective imaging part, and safe driving of the user is facilitated.

Fig. 3 is a schematic structural view of a reflective imaging section according to some embodiments of the present disclosure.

As shown in fig. 3, the main body portion of the reflection imaging portion 100 in some embodiments of the present disclosure includes: a first transparent substrate 110 and a second transparent substrate 120. In some embodiments, the first transparent substrate and the second transparent substrate are glass substrates. For example, the first transparent substrate and the second transparent substrate are glass substrates having a certain curvature.

The first transparent substrate 110 and the second transparent substrate 120 are included along the image light L ₁ The first surface is the surface closest to the eye box area 300 among the first surface to the fourth surface, and the fourth surface is the surface farthest from the eye box area 300 among the first surface to the fourth surface.

The first reflective film is disposed on at least one of the second to fourth surfaces. In some embodiments, the first reflective film 140 is disposed on the 2-sided.

In specific implementation, a first reflecting film can be arranged on the 2 sides in a film plating or film pasting mode.

In some embodiments, the body portion of the reflective imaging portion 100 further comprises: an intermediate layer 130 disposed between the first transparent substrate 110 and the second transparent substrate 120. In some embodiments, the intermediate layer 130 is a thermoplastic polymer film that is primarily used to bond the first transparent substrate 110 and the second transparent substrate. For example, the interlayer is a layer of polyvinyl butyral (PVB).

In the embodiment of the present disclosure, the image light L ₁ At least part of the second characteristic image light and part of the first characteristic image light are transmitted and part of the first characteristic image light is reflected when incident on the 1-face of the reflection imaging section 100. Wherein the light reflected by the 1-plane is denoted as first characteristic display light L ₂ Light L transmitted by 1 plane ₄ Continuing to be incident on the 2-side of the reflective imaging section, the first reflective film provided on the 2-side reflects at least part of the second characteristic image light, and the reflected second characteristic image light is denoted as second characteristic display light L ₃ . This isIn this case, the reflective imaging section can form a first image S1 in which light is displayed based on the first characteristic and a second image S2 in which light is displayed based on the second characteristic.

In some examples, if the imaging distance of the first image and/or the second image is less than a preset threshold, at least one of the first transparent substrate and the second transparent substrate is wedge-shaped to reduce or eliminate ghosts between imaging. And/or the intermediate layer is wedge-shaped to reduce or eliminate ghosting between imaging.

For example, in the case where the first reflective film is provided on both the second surface and the third surface, the first transparent substrate and the intermediate layer may be provided in a wedge shape for ghost elimination.

In other examples, the imaging distance of the display device is made not less than a preset threshold. In some embodiments, the imaging distance refers to the distance between the center of the eye box region to the center of the virtual image (or other reference point). In some embodiments, the preset threshold is determined based on a height deviation between the first image and the second image, and a human eye resolution. For example, the height deviation between the first image and the second image is calculated based on the distance between the reflective surface forming the first image and the reflective surface forming the second image, the preset threshold value is determined according to the height deviation and the resolution of the human eye (for example, 0.22mrad or an approximation thereof), the preset threshold value indicates the maximum distance by which the human eye can resolve the height deviation, and if the imaging distance exceeds the preset threshold value, the human eye cannot resolve the height deviation between the first image and the second image, i.e., no ghost is visible.

Fig. 4 is a schematic structural view of a reflective imaging section according to other embodiments of the present disclosure. As shown in fig. 4, the reflection imaging section 100 in the embodiment of the present disclosure includes: the first transparent substrate 110, the second transparent substrate 120, the intermediate layer 130, and the first reflective film 150.

The reflective imaging section of the embodiment of the present disclosure is different from the reflective imaging section shown in fig. 3 mainly in the arrangement position of the first reflective film. In the embodiment of the present disclosure, the first reflection film 150 is disposed at a third surface (3-sided) of the reflection imaging section, that is, at one of the two surfaces of the second transparent substrate 120 near the intermediate layer 130.

In the embodiment of the present disclosure, the light reflected via the first surface of the reflective imaging section 100 is mainly the first characteristic display light L ₂ The light reflected via the third surface of the reflective imaging section is mainly the second characteristic display light L ₃ . By making the reflected light include not only the first characteristic display light L ₂ Also comprises a second characteristic display light L ₃ The first image S1 and the second image S2 are formed via the first reflective imaging section, so that the user' S need for various viewing modes can be satisfied.

Fig. 5 is a schematic structural view of a reflective imaging section according to still other embodiments of the present disclosure. As shown in fig. 5, the reflection imaging section in the embodiment of the present disclosure includes: the first transparent substrate 110, the second transparent substrate 120, the intermediate layer 130, the first reflective film 140, and the first reflective film 150.

The reflective imaging section 100 of the embodiment of the present disclosure is mainly different from the reflective imaging section shown in fig. 3 in the number of first reflective films and the arrangement positions. In the embodiment of the present disclosure, two first reflective films are provided, wherein the first reflective film 140 is provided on the second surface (2 sides) of the reflective imaging section, that is, the surface of the two surfaces of the first transparent substrate near the intermediate layer, and the first reflective film 150 is provided on the third surface (3 sides) of the reflective imaging section, that is, the surface of the two surfaces of the second transparent substrate 120 near the intermediate layer 130.

In the embodiment of the present disclosure, by providing the first reflective film on both the 2-side and the 3-side, the second characteristic display light L is reflected via the 2-side ₃₁ Display light L of the second characteristic is reflected via the 3-plane ₃₂ Therefore, the content of the second characteristic display light in the reflected light is increased, brightness of an image formed by the second characteristic display light is improved, a user can well see an imaging picture in a second viewing mode, and user experience is further improved.

In the embodiment of the disclosure, by adopting the structure of the reflective imaging part shown in fig. 5, the reflected light not only includes the first characteristic display light, but also includes the second characteristic display light, thereby meeting the requirements of users for multiple viewing modes and improving the user experience. In addition, the first reflecting films are arranged on the 2-plane and the 3-plane, so that the content of second characteristic display light in reflected light is improved, the brightness of an imaging picture formed based on the second characteristic display light is ensured, a user wearing the light filtering device (such as polarized sunglasses) can also well see the imaging picture, and the user experience is further improved.

Fig. 6 is a schematic structural view of a reflective imaging section according to still other embodiments of the present disclosure. As shown in fig. 6, the reflection imaging section 100 in the embodiment of the present disclosure includes: the first transparent substrate 110, the second transparent substrate 120, the intermediate portion 130, the first reflective film 140, and the second reflective film 160.

The reflective imaging section of the embodiment of the present disclosure is mainly different from the reflective imaging section shown in fig. 3 in that it includes the second reflective film 160 provided on the 1-face in addition to the first reflective film 140 provided on the 2-face.

The second reflective film 160 is configured to have a higher reflectivity for the first characteristic image light than for the second characteristic image light, and/or the second reflective film is configured to have a lower transmissivity for the first characteristic image light than for the second characteristic image light.

In some embodiments, the first characteristic image light is vertically polarized light and the second characteristic image light is parallel polarized light.

In these embodiments, when the image light L ₁ When the light enters the first reflecting film on the first surface, the vertical polarized light (S polarized light) in the image light is reflected greatly, the total amount of the S polarized light transmitted to the reflective imaging part is reduced, so that the reflection of a large amount of S polarized light on the second surface and the third surface is avoided, and the imaging ghost problem caused by the reflection of the S polarized light on different surfaces is effectively relieved or even eliminated. Also, when the image light L ₁ When the light enters the first surface provided with the second reflecting film, the P polarized light in the image light is transmitted in a large quantity, and when the transmitted P polarized light enters the second surface provided with the first reflecting film, the transmitted P polarized light is reflected by the second surface, so that the reflected light also comprises the P polarized light, an imaging picture based on the P polarized light is formed, and a user wearing the polarized sunglasses can see the imaging picture.

In some embodiments, the first characteristic image light is light in a first wavelength range and the second characteristic image light is light in a second wavelength range. The principle of imaging and ghost elimination is similar to that of the aforementioned polarized light, and thus will not be described again.

Fig. 7 is a schematic structural view of a reflective imaging section according to still further embodiments of the present disclosure.

As shown in fig. 7, in some embodiments, the reflective imaging section includes: the first transparent substrate 110, the second transparent substrate 120, the intermediate layer 130, the first reflective film 140, the first reflective film 150, and the second reflective film 160. Wherein the first reflective film 140 is disposed on the 2-side, the first reflective film 150 is disposed on the 3-side, and the second reflective film 160 is disposed on the 1-side.

The reflective imaging section of the embodiment of the present disclosure is mainly different from the reflective imaging section shown in fig. 3 in that: 1. the number of first reflective films is different; 2. the reflective film includes not only the first reflective film but also the second reflective film.

In some embodiments, to mitigate or eliminate the first characteristic display light L reflected by the 1-sided ₂ The formed image S1 and the second characteristic display light L reflected by the 2-surface and the 3-surface ₃₁ 、L ₃₂ The reflection imaging section 100 also satisfies at least one of the following problems of ghost images between the imaged images S21, S22: at least one of the intermediate layer and the first transparent substrate is provided in a wedge shape; making the energy ratio of the second characteristic image light in the image light smaller than the energy ratio of the first characteristic image light in the image light; and making the imaging distance not smaller than a preset threshold value.

In other embodiments, the total number of transparent substrates in the reflective imaging section may also be 3, 4, 5, or other integer greater than 2.

In other embodiments, when the number of transparent substrates is greater than two, the number of the first reflective films may be increased accordingly, so as to increase the content of the second characteristic display light in the reflected light, and further increase the brightness of the virtual image formed based on the second characteristic display light, but not limited thereto.

In other embodiments, when the number of transparent substrates is greater than two, an intermediate layer may also be disposed between any two adjacent transparent substrates. Wherein one or more of all intermediate layers may be provided in a wedge shape.

In the embodiment of the disclosure, by adopting the structure of the reflective imaging part shown in fig. 7, the reflected light not only includes the first characteristic display light, but also includes the second characteristic display light, thereby meeting the requirements of users for multiple viewing modes and improving the user experience.

Fig. 8 is a schematic structural view of a first reflective film according to some embodiments of the present disclosure. As shown in fig. 8, the first reflection film of the embodiment of the present disclosure is a laminated structure composed of a plurality of refractive index layers including: a first refractive index layer 141 and a second refractive index layer 142. Wherein the refractive index of the first refractive index layer 141 is higher than the refractive index of the second refractive index layer 142.

In some embodiments, the first reflective film is a laminated structure composed of a plurality of first refractive index layers and a plurality of second refractive index layers. For example, the first reflective film is formed by stacking four refractive index layers, which are a first refractive index layer, a second refractive index layer, a first refractive index layer, and a second refractive index layer in this order.

In some embodiments, the geometric thickness of the first refractive index layer 141 is 50nm to 100nm and the geometric thickness of the second refractive index layer 142 is 80nm to 120nm.

In some embodiments, when the first reflective film includes a plurality of first refractive index layers, thicknesses of the plurality of first refractive index layers may be different from each other; when the first reflective film includes a plurality of second refractive index layers, thicknesses of the plurality of second refractive index layers may also be different from each other.

In some embodiments, the first refractive index layer is selected from at least one of oxides of zinc (Zn), tin (Sn), titanium (Ti), niobium (Nb), zirconium (Zr), nickel (Ni), indium (In), aluminum (Al), cerium (Ce), tungsten (W), molybdenum (Mo), antimony (Sb), bismuth (Bi) elements, and mixtures thereof, or nitrides of silicon (Si), aluminum (Al), zirconium (Zr), yttrium (Y), cerium (Ce), lanthanum (La) elements, oxynitrides, and mixtures thereof.

In some embodiments, the second refractive index layer is selected from at least one of an oxide of silicon (Si) or aluminum (Al), oxynitride, or a mixture thereof.

In some embodiments, the first refractive index layer and the second refractive index layer are deposited by physical vapor deposition (e.g., evaporation, sputtering, etc.) or chemical vapor deposition methods known to those skilled in the art. For example, the deposition of the first refractive index layer and the second refractive index layer by adopting a horizontal magnetron sputtering coating mode comprises the following steps: after the original piece of glass of the glass plate is subjected to pretreatment, cleaning and other working procedures, the original piece of glass of the glass plate is placed into a sputtering coating chamber provided with a plurality of coating cathodes for coating, and each film layer is sequentially deposited according to a laminated structure and a thickness design thereof; after coating, high-temperature forming and lamination are carried out; finally, before or after lamination, the low surface energy film layer is coated and arranged on the surface of the laminated structure through the steps of surface cleaning, coating (such as spraying, dip coating or smearing), drying and the like, so that the parallel polarized light reflecting film is obtained.

According to another aspect of the present disclosure, there is also provided a display device configured to include a first viewing mode configured to cause a user to view at least a first image through an eye box area of the display device, the first image being an image of first characteristic display light, and a second viewing mode configured to cause the user to view a second image through a light filtering device and the eye box area, the second image being an image of second characteristic display light, an imaging distance of both the first image and the second image being greater than a preset threshold, the preset threshold being a value related to a height deviation between the first image and the second image and a resolution of human eyes.

In the embodiment of the disclosure, the display device comprises two viewing modes, so that the requirements of users on multiple viewing modes can be met; further, the imaging distance of the first image and the second image is larger than the preset threshold value, so that the human eyes cannot distinguish the height deviation between the first image and the second image, and double images cannot be seen, and further a user can see clear imaging pictures in two viewing modes, and the viewing experience of the user is improved.

In some embodiments, the predetermined threshold is a ratio of a height deviation between the first image and the second image to a resolution of a human eye Values. For example, the height deviation between the first image and the second image is d, the human eye resolution is α, and the preset threshold isWherein, the resolution of human eyes can take a value of 0.22 milliradian (mrad).

In some embodiments, a display device includes: an image source configured to emit image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; and a reflection imaging section configured to reflect the image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

In some embodiments, the display device further comprises: the amplifying element 500, disposed between the image source and the reflective imaging section, is configured to amplify the image light before the image light is incident on the reflective imaging section. For example, the magnifying element is a free-form mirror, or other lens with magnifying effect.

According to another aspect of the present disclosure, there is also provided a display apparatus including: an image source configured to emit image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; and a reflection imaging section configured to reflect the incident image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

Wherein, in the energy sum of the first characteristic display light and the second characteristic display light, the energy ratio of the second characteristic display light is smaller than the energy ratio of the first characteristic display light; and/or the energy ratio of the second characteristic image light in the image light is smaller than the energy ratio of the first characteristic image light in the image light.

For example, the display device is a head-up display.

According to another aspect of the present disclosure, there is provided a head-up display including the aforementioned display device.

According to another aspect of the present disclosure, there is also provided a method of improving a ghost phenomenon, including: making the image light emitted by the image source incident on the amplifying element; and reflecting the image light processed by the amplifying element through the reflection imaging part to form a first image and a second image, wherein the imaging distance between the first image and the second image is not smaller than a preset threshold value, and the preset threshold value is a value related to the height deviation between the first image and the second image and the resolution of human eyes.

In some embodiments, the predetermined threshold is a ratio of a height deviation between the first image and the second image to a resolution of a human eye.

In some embodiments, the magnifying element is a free-form mirror, or other lens with magnification. By arranging the amplifying element, on one hand, the image light emitted by the image source can be amplified, the imaging requirement of the reflective imaging part is met, and the user viewing experience is improved; on the other hand, by providing the amplifying element, it is convenient to adjust the imaging distance.

According to another aspect of the present disclosure, there is also provided a windshield. The windshield is configured to receive image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; the windshield is further configured to reflect the image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

In some embodiments, the energy ratio of the second characteristic display light is less than the energy ratio of the first characteristic display light in the sum of the energies of the first characteristic display light and the second characteristic display light; and/or the energy ratio of the second characteristic image light in the image light is smaller than the energy ratio of the first characteristic image light in the image light.

In some embodiments, the windshield may employ the structure of the reflective imaging section in any of the foregoing embodiments.

In the embodiment of the disclosure, through the windshield, the reflected light not only includes the first characteristic display light, but also includes the second characteristic display light, so that a user who does not wear the light filtering device sees a first image formed based on the first characteristic display light, and the user who wears the light filtering device sees a second image formed by the second characteristic display light, thereby meeting the requirements of the user on multiple viewing modes and improving the user experience.

Fig. 9 is a schematic structural view of a traffic device according to some embodiments of the present disclosure. As shown in fig. 9, the traffic device 900 includes a heads-up display 910.

In some embodiments, heads-up display 910 is a display device in any of the foregoing embodiments of the present disclosure.

The traffic device 900 includes, but is not limited to, land vehicles such as vehicles, air vehicles such as aircraft, or water or underwater vehicles.

According to the embodiment of the disclosure, through the traffic equipment, the requirements of users on multiple watching modes can be met, and the experience of using the head-up display when the users take the traffic equipment is improved.

Fig. 10 is a flow chart of a display method according to some embodiments of the present disclosure. As shown in fig. 10, a display method according to an embodiment of the present disclosure includes:

step S1010: in a first viewing mode, at least a first image is viewed through an eye-box area of the display device.

Wherein the first image is an image of the first characteristic display light.

Step S1020: in a second viewing mode, a second image is viewed through the light filtering device and the eyebox area of the display device.

Wherein the second image is an image of second characteristic display light having optical characteristics different from those of the first characteristic display light, the light filtering means being configured to filter at least part of the first characteristic display light and to transmit at least part of the second characteristic display light.

In some embodiments, the display method is implemented based on the display device or the traffic equipment of any of the foregoing embodiments of the present disclosure.

In the embodiment of the disclosure, the method can meet the requirements of users for multiple viewing modes, and improve the user experience.

According to another aspect of the present disclosure, there is provided an apparatus for improving a ghost phenomenon, including: the image source, the amplifying element and the reflection imaging part, wherein the amplifying element processes the image light emitted by the image source, the processed image light is reflected by the reflection imaging part to form a first image and a second image, the imaging distance between the first image and the second image is not smaller than a preset threshold, and the preset threshold is a value related to the height deviation between the first image and the second image and the resolution of human eyes. Such an arrangement may improve the ghost phenomenon without additional cost, so that the user sees a better definition of the virtual image (either the first or second image alone or the image in which the first and second images are superimposed).

Thus far, the display method, apparatus, and traffic device according to the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Claims

1. A display device configured to include a first viewing mode and a second viewing mode, wherein,

the first viewing mode is configured to cause a user to view at least a first image through an eyebox area of the display device, the first image being an image of first characteristic display light;

the second viewing mode is configured to cause a user to view a second image through a light filtering device and the eye-box region, the second image being an image of second characteristic display light having optical characteristics different from the optical characteristics of the first characteristic display light, the light filtering device being configured to filter at least a portion of the first characteristic display light and transmit at least a portion of the second characteristic display light.

2. The display device according to claim 1, wherein,

the first characteristic display light and the second characteristic display light are incident to the eye-box area at the same time.

3. The display device according to claim 1, wherein,

the first viewing mode is configured to cause a user to view only a first image through the eyebox area, or the first viewing mode is configured to cause a user to view a first image and a second image through the eyebox area, and the visibility of the first image is greater than the visibility of the second image; and/or the number of the groups of groups,

The second viewing mode is configured to allow a user to view only a second image through the light filtering device and the eyebox area.

4. The display device according to claim 1, wherein the display device comprises:

an image source configured to emit image light, wherein the image light includes first characteristic image light and second characteristic image light having different optical characteristics; and

a reflection imaging section configured to reflect incident image light to emit first characteristic display light corresponding to the first characteristic image light and second characteristic display light corresponding to the second characteristic image light, and to form a first image by the first characteristic display light and a second image by the second characteristic display light.

5. The display device according to claim 4, wherein,

the energy ratio of the second characteristic display light is smaller than the energy ratio of the first characteristic display light in the energy sum of the first characteristic display light and the second characteristic display light;

and/or the number of the groups of groups,

the energy ratio of the second characteristic image light in the image light is smaller than the energy ratio of the first characteristic image light in the image light.

6. The display device according to claim 5, wherein the energy ratio of the second characteristic image light in the image light is greater than or equal to 10% and less than 50%.

7. The display device according to claim 4, wherein the reflective imaging section includes a main body section, and at least one first reflective film provided in the main body section;

the first reflective film is configured to have a reflectance for the second characteristic image light that is greater than a reflectance for the first characteristic image light, and/or the first reflective film is configured to have a transmittance for the second characteristic image light that is less than a transmittance for the first characteristic image light.

8. The display device according to claim 7, wherein the main body portion includes a first transparent substrate and a second transparent substrate including first to fourth surfaces disposed in order along an incident direction of the image light, wherein the first surface is a surface closest to the eye-box region among the first to fourth surfaces;

the first reflective film is disposed on at least one of the second to fourth surfaces.

9. The display device according to claim 8, wherein the first reflection film is provided on a second surface and/or a third surface of the first to fourth surfaces.

10. The display device according to claim 7, wherein:

the total transmittance of the first reflective film is greater than or equal to 70%; and/or

The reflectivity of the first reflective film to the second characteristic image light is more than or equal to 5%, or the reflectivity of the first reflective film to the second characteristic image light is 10% -15%;

and/or

The incident angle of the image light to the reflective imaging section is 35 DEG to 70 deg.

11. The display device according to any one of claims 8 to 10, wherein the reflection imaging section further comprises:

an intermediate layer disposed between the first transparent substrate and the second transparent substrate;

the intermediate layer is wedge-shaped, and/or at least one of the first transparent substrate and the second transparent substrate is wedge-shaped.

12. The display device of claim 11, wherein the intermediate layer is a thermoplastic polymer film layer.

13. The display device according to any one of claims 1 to 10, wherein: the imaging distance between the first image and the second image of the display device is not smaller than a preset threshold value; and/or

The first characteristic display light is S polarized light, and the second characteristic display light is P polarized light; and/or

The first characteristic display light is light in a first wavelength range and the second characteristic display light is light in a second wavelength range.

14. The display device of claim 13, the preset threshold being a value related to a height deviation between the first image and the second image and a resolution of a human eye.

15. The display device according to any one of claims 7 to 10, wherein the first reflection film is a stacked structure composed of a plurality of refractive index layers including a first refractive index layer and a second refractive index layer, and wherein the refractive index of the first refractive index layer is higher than the refractive index of the second refractive index layer.

16. The display device according to claim 15, wherein the geometric thickness of the first refractive index layer is 50nm to 100nm, and the geometric thickness of the second refractive index layer is 80nm to 120nm.

17. A display device, comprising:

18. The display device of claim 17, wherein,

and/or

19. A display device is configured to include a first viewing mode and a second viewing mode,

the second viewing mode is configured to enable a user to view a second image through the light filtering device and the eye box region, the second image being an image of the second characteristic display light, the imaging distances of the first image and the second image being greater than a preset threshold, the preset threshold being a value related to a height deviation between the first image and the second image and a resolution of a human eye.

20. A head-up display comprising the display device of any one of claims 1-19.

21. A display method applied to the display device of any one of claims 1 to 19 or the head-up display of claim 20, comprising:

in a first viewing mode, at least a first image is viewed through an eye-box region of the display device, the first image being an image of first characteristic display light;

in a second viewing mode, a second image is viewed through a light filtering device and an eye-box region of the display device, the second image being an image of second characteristic display light having optical characteristics different from those of the first characteristic display light, the light filtering device being configured to filter at least part of the first characteristic display light and transmit at least part of the second characteristic display light.

22. A traffic device, comprising:

the display device of any one of claims 1-19, or the heads-up display of claim 20.

23. A method of improving ghost phenomena, comprising: making the image light emitted by the image source incident on the amplifying element; and reflecting the image light processed by the amplifying element through the reflection imaging part to form a first image and a second image, wherein the imaging distance between the first image and the second image is not smaller than a preset threshold value, and the preset threshold value is a value related to the height deviation between the first image and the second image and the resolution of human eyes.

24. An apparatus for improving ghost phenomena, comprising: the image source, the amplifying element and the reflection imaging part, wherein the amplifying element processes the image light emitted by the image source, the processed image light is reflected by the reflection imaging part to form a first image and a second image, the imaging distance between the first image and the second image is not smaller than a preset threshold, and the preset threshold is a value related to the height deviation between the first image and the second image and the resolution of human eyes.