CN117192780A - Display device for eliminating reflected light - Google Patents
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- CN117192780A CN117192780A CN202311351388.5A CN202311351388A CN117192780A CN 117192780 A CN117192780 A CN 117192780A CN 202311351388 A CN202311351388 A CN 202311351388A CN 117192780 A CN117192780 A CN 117192780A
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Abstract
The invention relates to a display device for eliminating reflected light, which is used for eliminating unpolarized natural light transmitted through a front windshield, and comprises a polaroid, a wave plate, an optical waveguide unit and a reflecting element which are stacked in sequence; the non-polarized natural light is transmitted through the polarizing plate to form linear polarized light by utilizing the absorption effect of the polarizing plate, and the polarization state of the linear polarized light is changed by using the wave plate. When the two linearly polarized lights with the vibration directions being perpendicular to each other and no phase difference and equal amplitude generate the phase difference being pi, the combined vibration direction of the light vector is perpendicular to the original direction, and the linearly polarized light with the phase difference being pi cannot penetrate the polarizing plate any more, so that the external reflected light entering eyes of a driver is eliminated. Simultaneously, the polaroid, the wave plate, the optical waveguide unit and the reflecting element are all of a flat plate structure, so that the production difficulty of the display device is low, the size of the display device is small, the installation space required by the display device installed on a vehicle can be effectively reduced, and the installation difficulty of the display device is further effectively reduced.
Description
Technical Field
The invention relates to the technical field of AR-HUD, in particular to a display device for eliminating reflected light.
Background
The AR-HUD augmented reality head-up display is a combination of an augmented reality technology and a HUD head-up display function, after an optical machine is imaged, an input image light to be displayed formed by the optical machine is coupled into a waveguide sheet by a coupling-in area to form conduction light which is reflected back and transmitted in the waveguide sheet in a total internal reflection mode, the conduction light is coupled out of the waveguide sheet by a coupling-out area to form output image light, the output image light is incident on a front windshield of an automobile after passing through a transparent glass protective cover above the waveguide sheet, and is reflected by the front windshield and enters eyes, so that a virtual image is formed in front of the automobile, a visual special effect is matched with a real road element, a larger visual field angle and a farther imaging distance can be possessed, and richer and more visual information display can be provided.
In practical use, a common automobile front windshield is generally composed of two approximately flat glass layers bonded by an intermediate plastic layer of equal thickness, which is generally a thermoplastic. The refractive index of the middle plastic layer is typically chosen to be the same as or close to that of the two layers of glass, so that it is believed that the plastic and glass interface will not reflect light or be too low to be perceived. It is believed that when light strikes such an almost transparent automotive front windshield, a substantial portion of the light will penetrate the front windshield and only a small portion of the light will be partially reflected at the inner and outer glass-air interfaces of the front windshield. For normal polarization disordered natural light, the reflectivity of the two glass-air interfaces is about 15% in combination. After the optical waveguide HUD images the optical machine, the coupling-in area couples the light beam of the optical machine into the waveguide sheet, after the light beam is totally reflected in the waveguide sheet, the light beam is transmitted out of the waveguide sheet through the coupling-out area, the emergent light of the waveguide sheet is incident on the front windshield of the automobile after passing through the transparent glass protective cover on the waveguide sheet, and is reflected by the front windshield and enters the eye, so that a virtual image is formed in front of the automobile.
However, for the conventional optical waveguide HUD, since most of external light enters the vehicle through the windshield, when the incident light is at a certain angle, the incident light is reflected by the transparent glass protective cover and then enters the eyes of the driver, as shown in fig. 1, the dazzling reflection seriously affects the safe driving of the driver, and in addition, when the incident angle of the sunlight is at the brewster angle, the reflected light is S-shaped linearly polarized light, and the reflected polarized light can cause a strong glare effect. The driver can reduce the influence of reflected light by wearing sunglasses or wearing glasses made of a polarizing plate, but this method also weakens the imaging light beam reflected through the front windshield into the driver's eyes. Selective elimination of reflected sunlight is not possible.
Another optical waveguide HUD is also disclosed in the prior art, in which the reflection direction of the incident sunlight is changed by changing the planar transparent glass protective cover to the curved transparent glass protective cover, so that the reflected light does not enter the eyes of the driver, as shown in fig. 2, thereby eliminating the glare problem. However, this solution requires a larger installation volume, which can certainly increase the difficulty of installing the head-up display, and the glass protective cover with a certain curved surface is relatively troublesome to process and manufacture, has relatively high cost, and is easy to generate the effect of collecting reflected light, thereby causing local temperature rise, so that the glass protective cover has no universality.
In the technical scheme, the transparent glass protective cover is processed into the circular arc shape, the reflection direction of sunlight is changed, reflected light does not enter human eyes, so that the strong glare effect is eliminated, the scheme needs larger installation volume, the circular arc-shaped glass is inconvenient to process, the realization cost is high, the installation of the whole vehicle is not facilitated, in addition, the circular arc-shaped transparent glass protective cover can easily cause the condensation effect, the reflected light is concentrated in a certain area, and the safety is not achieved.
Disclosure of Invention
The invention discloses a display device for eliminating reflected light, which aims to solve the problems that an existing vehicle-mounted HUD head-up display in the background technology needs larger installation volume, the arc-shaped glass is inconvenient to process, the realization cost is high, the installation of the whole vehicle is not facilitated, and in addition, a condensation effect is easily caused by an arc-shaped transparent glass protective cover, so that the reflected light is concentrated in a certain area and the safety is not realized.
In order to solve the technical problems, the following technical scheme is proposed:
a display device for eliminating reflected light includes a polarizer, a wave plate, an optical waveguide unit, and a reflective element stacked;
the polarizing plate is used for changing incident unpolarized natural light into linearly polarized light and absorbing light with the vibration direction of an electric field perpendicular to the vibration transmission direction of the polarizing plate;
the wave plate is used for changing the polarization state of linearly polarized light;
the non-polarized natural light enters the polaroid, the non-polarized natural light is modulated by the polaroid to form linearly polarized light, the linearly polarized light passes through the wave plate to form first polarized characteristic light, the first polarized characteristic light is reflected by the reflecting element and then enters the wave plate again, and the first polarized characteristic light passes through the wave plate to form second polarized characteristic light which can be absorbed by the polaroid and is absorbed by the polaroid.
Preferably, the optical waveguide unit includes a transparent substrate, the transparent substrate being provided with an in-coupling region for receiving input image light to be displayed and coupling the input image light into the transparent substrate to form conductive light propagating in a total internal reflection manner, and an out-coupling region for receiving the conductive light and coupling it out of the optical waveguide unit to form output image light.
Preferably, the light of the first polarization characteristic is left-handed or right-handed circularly polarized light.
Preferably, the polarizing plate is configured to change incident unpolarized natural light into P-polarized linear polarized light and absorb an S-polarized light component having a vibration direction perpendicular to a vibration transmission direction of the polarizing plate, wherein the unpolarized natural light is incident on the polarizing plate and modulated by the polarizing plate to form P-polarized linear polarized light, the linear polarized light passes through the wave plate to form first polarized characteristic light, the first polarized characteristic light is reflected by the reflecting element and then is incident on the wave plate again, and the first polarized characteristic light passes through the wave plate to form S-polarized linear polarized light which can be absorbed by the polarizing plate and is absorbed by the polarizing plate.
Preferably, the polarizing plate is an absorption type polarizing plate or a crystal having a selective absorption function for electromagnetic vibration in different directions.
Preferably, the reflective element is a metal reflective film, a dielectric film or a metal-dielectric composite film.
Preferably, the polarizing plate is configured to change incident unpolarized natural light into S-polarized linear polarized light and absorb a P-polarized linear polarized light component having a vibration direction perpendicular to a transmission vibration direction of the polarizing plate, wherein the unpolarized natural light is modulated by the polarizing plate to form S-polarized linear polarized light after being incident on the polarizing plate, the linear polarized light passes through the wave plate to form first polarized characteristic light, the first polarized characteristic light is reflected by the reflecting element and then is incident on the wave plate again, and the first polarized characteristic light passes through the wave plate to form P-polarized linear polarized light which can be absorbed by the polarizing plate and is absorbed by the polarizing plate.
Preferably, the polarizing plate is an absorption type polarizing plate or a crystal having a selective absorption function for electromagnetic vibration in different directions.
Preferably, the reflective element is a metal reflective film, a dielectric film or a metal-dielectric composite film.
The beneficial effects are that: the invention relates to a display device for eliminating reflected light, which is used for eliminating unpolarized natural light transmitted through a front windshield, and comprises a polaroid, a wave plate, an optical waveguide unit and a reflecting element which are stacked; the non-polarized natural light is transmitted through the polarizing plate to form linear polarized light by utilizing the absorption effect of the polarizing plate, and the polarization state of the linear polarized light is changed by using the wave plate. When the two linearly polarized lights with the vibration directions being perpendicular to each other and no phase difference and equal amplitude generate the phase difference being pi, the combined vibration direction of the light vector is perpendicular to the original direction, and the linearly polarized light with the phase difference being pi cannot penetrate the polarizing plate any more, so that the external reflected light entering eyes of a driver is eliminated. Meanwhile, the display device for eliminating the reflected light is formed by stacking the polaroid, the wave plate, the optical waveguide unit and the reflecting element which are all of flat plate structures, so that the production difficulty of the display device is low, the size of the display device is small, the installation space occupied by the display device installed on a vehicle can be effectively reduced, and the installation difficulty of the display device is further effectively reduced.
Drawings
FIGS. 1-2 are schematic diagrams of a prior art display device;
FIG. 3 is a schematic view of unpolarized natural light passing through a polarizer;
FIG. 4 is a schematic diagram of the synthetic polarization states of various phase differences;
FIG. 5 is a schematic diagram of the structure of the present invention;
FIG. 6 is a schematic view of the usage status of embodiment 1 of the present invention;
fig. 7 is a schematic view illustrating a use state of embodiment 2 of the present invention.
The main reference numerals are as follows:
1. a polarizing plate; 2. a wave plate; 3. an optical waveguide unit; 4. a reflective element; 5. a front windshield; 6. unpolarized natural light; 7. p-polarized linearly polarized light; 8. s-polarized linearly polarized light.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The following detailed description of the embodiments of the invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is a display device for eliminating reflected light, please refer to fig. 3-7, for eliminating unpolarized natural light transmitted through the front windshield 5, comprising a polarizer 1, a wave plate 2, an optical waveguide unit 3 and a reflecting element 4 stacked in order;
the polarizing plate 1 can selectively absorb electromagnetic vibration in different directions, and the ideal polarizing plate 1 only allows light in one vibration direction to pass through, namely, the light passing through the ideal polarizing plate 1 is linearly polarized, so that the incident unpolarized natural light is changed into linearly polarized light by the polarizing plate 1, and the light with the electric field vibration direction perpendicular to the vibration transmission direction of the polarizing plate 1 is absorbed, so that the extinction effect is achieved.
The wave plate 2 changes the optical path difference (phase difference) of two perpendicular linearly polarized lights through the refractive index difference so as to change the polarization state of the two perpendicular linearly polarized lights, and the different phase differences correspond to different polarization states, and the wave plate 2 is used for changing the polarization state of the linearly polarized lights; the waveplate typically includes a birefringent crystal having an optical axis, the refractive index of the crystal being different for light polarized in the direction of the optical axis and for light polarized perpendicular to the optical axis, resulting in a 1/4 wavelength path difference for the light of both polarization directions after passing through the crystal. In one embodiment of the present patent, the optical axis of the wave plate is at an angle of 45 degrees to the direction of transmission of the polarizer. When the linearly polarized light modulated by the polaroid passes through the wave plate with the optical axis being placed at 45 degrees, the linearly polarized light can be divided into two parts, namely, the polarization direction is perpendicular to the optical axis of the wave plate and the polarization direction is along the optical axis of the wave plate. The two parts of light have different optical path differences after passing through the wave plate, so that phase differences are formed, and the polarization state changes after recombination, for example, the light changes into left-handed circularly polarized light or right-handed circularly polarized light.
Specifically, in the use process, after the unpolarized natural light is transmitted through the front windshield 5 and is injected into the polarizer 1, the unpolarized natural light is modulated by the polarizer 1 to form linearly polarized light, the polarization state of the linearly polarized light is changed by the wave plate 2 after the linearly polarized light passes through the wave plate 2 for the first time, and then first polarized characteristic light is formed, the first polarized characteristic light is reflected by the reflecting element 4 and then injected into the wave plate 2 again, and after the first polarized characteristic light passes through the wave plate 2 again, the wave plate 2 changes the polarization state of the first polarized characteristic light to form second polarized characteristic light with the vibration direction being not parallel to the vibration transmission direction of the polarizer 1, however, as the polarizer 1 can absorb light with the vibration direction being perpendicular to the vibration transmission direction of the polarizer 1, the second polarized characteristic light is absorbed by the polarizer 1, and further the extinction effect is achieved.
Light (such as sunlight, lamplight and the like) emitted by a common light source is unpolarized natural light, and the vibration directions and phases of the light are random and randomly changed, so that almost all directions have light vector vibration which is different in size and uneven in front and back and changes rapidly when seen from a plane perpendicular to the light propagation direction, and on the statistical average, the vibration in any direction is not more dominant than the vibration in other directions, namely the vibration of the light vector is symmetrically distributed in all directions, and the vibration amplitude can be seen to be completely equal. The light vector of the linearly polarized light always vibrates in one direction, and the circularly polarized light can be regarded as the synthesis of two linearly polarized lights with pi/2 phase difference, same amplitude and mutually perpendicular vibration directions.
The polarizer can selectively absorb electromagnetic vibration in different directions, and the ideal polarizer only allows light in one vibration direction to pass through, i.e. the light passing through the ideal polarizer is linearly polarized. Both polarized light and unpolarized light can be regarded as the combination of two linearly polarized light with mutually perpendicular vibration directions, and when the amplitudes of the two linearly polarized light are the same, the polarization state of the two linearly polarized light can be changed by adjusting the phase difference of the two linearly polarized light.
The wave plate is used for changing the optical path difference (phase difference) of two perpendicular linearly polarized lights through the refractive index difference so as to change the polarization state of the lights, and different phase differences correspond to different polarization states.
When two mutually perpendicular equal-amplitude linear polarized lights do not have phase differences, the combined vibration of the light vectors is linear polarized light in a three quadrant, the phase differences are elliptical polarized lights with long axes in the three quadrant between 0 and pi/2, the phase differences are circular polarized lights when the phase differences are in the pi/2, the phase differences are elliptical polarized lights with long axes in the two four quadrants between pi/2 and pi, the phase differences are linear polarized lights when the phase differences are in the pi, the combined vibration of the light vectors is in the two four quadrants, and the vibration direction of the light vectors when the phase differences do not exist is perpendicular to the vibration direction of the light vectors.
In the embodiment, the non-polarized natural light is transmitted through the polarizer 1 to form linearly polarized light by the absorption of the polarizer 1, and the polarization state of the linearly polarized light is changed by the wave plate 2. When the two linearly polarized lights with mutually perpendicular vibration directions, no phase difference and equal amplitude generate the phase difference of pi, the combined vibration direction of the light vector is perpendicular to the original direction, and the linearly polarized light with the phase difference of pi cannot penetrate the polarizing plate 1 any more, so that the external reflected light entering eyes of a driver is eliminated. Meanwhile, the display device for eliminating the reflected light is formed by stacking the polaroid 1, the wave plate 2, the optical waveguide unit 3 and the reflecting element 4 which are all of flat plate structures, so that the production difficulty of the display device is low, the size of the display device is small, the installation space required by the display device installed on a vehicle can be effectively reduced, and the installation difficulty of the display device is further effectively reduced.
In the present embodiment, since the wave plate 2 is an optical element that changes the optical path difference (phase difference) of two orthogonal linearly polarized lights by the refractive index difference, thereby changing the polarization state of the linearly polarized lights by the wave plate 2 to form second polarized characteristic lights having the light vector of which the combined vibration direction is perpendicular to the light vector of the linearly polarized lights, so that the polarizing plate 1 can fully absorb the second polarized characteristic lights, thereby further improving the extinction effect of the display device.
In this embodiment, the polarizer 1 is used as an optical base element, and its function is to convert incident light with any polarization state into linear polarized light, and the polarizer 1 can make light with the combined vibration direction of its light vector perpendicular to the vibration direction of the polarizer 1 completely unable to pass through the polarizer 1, so as to achieve extinction effect. Therefore, the polarizer 1 is an absorption type polarizer 1 or a crystal with selective absorption function for electromagnetic vibration in different directions, and the light in other directions except the light in a specific direction cannot pass through the polarizer 1 by selective absorption of the light in different directions, so that the reflection effect of eliminating the incident unpolarized natural light is achieved, and the incident natural light cannot be reflected again and enter eyes of a driver.
In this embodiment, the optical waveguide unit includes a transparent substrate, where the transparent substrate is provided with an in-coupling region and an out-coupling region, the in-coupling region is configured to receive input image light to be displayed, and couple the input image light into the transparent substrate to form a conductive light propagating in a total internal reflection manner, and the out-coupling region receives the conductive light and couples the conductive light out of the optical waveguide unit to form output image light. Specifically, the light coupled out by the optical waveguide unit is circularly polarized light, the rotation direction of the circularly polarized light coupled out by the optical waveguide unit is opposite to that of the first polarized light, the circularly polarized light coupled out by the optical waveguide unit passes through the wave plate to form linearly polarized light with the polarization direction parallel to the vibration transmission direction of the polarizing plate, so that the linearly polarized light parallel to the vibration transmission direction of the polarizing plate can penetrate through the polarizing plate and enter eyes of a driver after being reflected by the windshield glass.
In the present embodiment, the reflecting element 4 is a metal reflecting film, a dielectric film, or a metal-dielectric composite film.
In this embodiment, the wave plate 2 is a quarter wave plate 2, after the linearly polarized light of the unpolarized natural light selected by the polarizer 1 passes through the quarter wave plate 2, the two components generate a pi/2 phase difference, after the two components are reflected back, the directions and the phase differences of the two components are unchanged, the two components pass through the 1/4 wave plate 2 again, the pi/2 phase differences are overlapped again, and the pi phase differences are shared, so that the synthesized light is the linearly polarized light (i.e. the second polarized characteristic light), and the polarization direction is perpendicular to the direction of the linearly polarized light selected by the polarizer 1, so that the second polarized characteristic light cannot pass through the polarizer 1 again.
In this embodiment, the polarizing plate 1 changes the incident unpolarized natural light into one of the P-polarized linear polarized light and the S-polarized linear polarized light, and the light is modulated by the wave plate 2 to form first polarized light, the first polarized light is left-handed or right-handed circularly polarized light, the first polarized light is reflected by the reflecting element and modulated by the wave plate again to form light perpendicular to the P-polarized linear polarized light or the S-polarized linear polarized light, so as to achieve the effect of eliminating the reflection of the incident unpolarized natural light, and the incident natural light cannot be reflected again and enter the eyes of the driver.
Example 1:
a display device that eliminates reflected light, comprising:
an absorbing polarizer 1 for changing the polarization state of incident unpolarized natural light, forming P-polarized linearly polarized light, or for absorbing S-polarized linearly polarized light;
a quarter wave plate 2 having a birefringent effect, the optical path difference produced by the transmitted light having two directions of vibration perpendicular to each other for a particular wavelength band being one quarter of the corresponding wavelength;
an optical waveguide unit 3 for transmitting and outputting the displayed image light;
a reflecting element 4 for reflecting all incident light rays;
specifically, the unpolarized natural light is incident on the absorption type polarizer 1 through the front windshield 5, the absorption type polarizer 1 receives the incident unpolarized natural light and forms P-polarized linear polarized light, the quarter wave plate 2 receives the P-polarized linear polarized light and converts the P-polarized linear polarized light into second transmitted circularly polarized light, the second transmitted circularly polarized light is transmitted and transmitted to the reflecting element 4 after passing through the optical waveguide unit 3, the reflecting element 4 receives and reflects the second transmitted circularly polarized light to form third reflected circularly polarized light, the quarter wave plate 2 receives the third reflected circularly polarized light and converts the third reflected circularly polarized light into a perpendicular S-polarized light component, and the polarizing plate 1 absorbs the S-polarized linear polarized light because the light vector vibration directions of the S-polarized light component and the P-polarized linear polarized light are perpendicular to each other, so that the reflection effect of the incident unpolarized natural light is eliminated, and the incident natural light cannot be reflected again and enters the eyes of a driver.
Example 2:
a display device that eliminates reflected light, comprising:
an absorption type polarizing plate 1 for changing the polarization state of incident unpolarized natural light to form S-polarized linearly polarized light, or for absorbing P-polarized linearly polarized light;
the quarter wave plate 2 has a double refraction effect, and the optical path difference generated by the refraction light with two mutually perpendicular vibration directions for a specific wave band is one quarter of the corresponding wavelength;
an optical waveguide unit 3 for transmitting and outputting the displayed image light;
a reflecting element 4 for reflecting all incident light rays;
specifically, the unpolarized natural light is incident on the absorption type polarizing plate 1 through the front windshield 5, the absorption type polarizing plate 1 receives the incident unpolarized natural light and forms S-polarized linear polarized light, the quarter wave plate 2 receives the S-polarized linear polarized light and converts the S-polarized linear polarized light into second transmitted circularly polarized light, the second transmitted circularly polarized light is transmitted and transmitted to the reflecting element 4 after passing through the optical waveguide unit 3, the reflecting element 4 receives and reflects the second transmitted circularly polarized light to form third reflected circularly polarized light, the quarter wave plate 2 receives the third reflected circularly polarized light and converts the third reflected circularly polarized light into vertical P-polarized light components, and the light vector vibration directions of the P-polarized linear polarized light and the S-polarized linear polarized light are mutually perpendicular, so that the polarizing plate 1 absorbs the P-polarized linear polarized light, and further achieves the effect of eliminating the reflection of the incident unpolarized natural light, and the incident natural light cannot be reflected again and enter the eyes of a driver.
The advantages are that:
according to the invention, the incident unpolarized light is converted into the linearly polarized light by utilizing the polaroid, and the polarization direction of the linearly polarized light is changed by the wave plate, so that the incident unpolarized natural light is finally absorbed by the polaroid, the effect of eliminating reflected light can be achieved, the display device disclosed by the invention has the advantages of simple structure, lower production difficulty and smaller volume, and the installation space required by the display device on a vehicle can be effectively reduced, and the installation difficulty of the display device is further effectively reduced.
The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.
Claims (10)
1. A display device for eliminating reflected light is characterized by comprising a polaroid, a wave plate, an optical waveguide unit and a reflecting element which are stacked;
the polarizer is used for changing incident unpolarized natural light into polarized light and absorbing light with the vibration direction of an electric field perpendicular to the vibration transmission direction of the polarizer;
the wave plate is used for changing the polarization state of polarized light;
the non-polarized natural light enters the polaroid sheet and is modulated by the polaroid sheet to form polarized light, the polarized light passes through the wave plate to form first polarized characteristic light, the first polarized characteristic light passes through the optical waveguide unit, the first polarized characteristic light is reflected by the reflecting element at the bottom end of the optical waveguide unit and then enters the wave plate again, and the first polarized characteristic light passes through the wave plate to form second polarized characteristic light which can be absorbed by the polaroid sheet and is absorbed by the polaroid sheet.
2. The display device for eliminating reflected light according to claim 1, wherein the optical waveguide unit comprises a transparent substrate, and the transparent substrate is provided with a coupling-in area and a coupling-out area, the coupling-in area is used for receiving input image light to be displayed, and coupling the input image light into the transparent substrate to form conductive light propagating in a total internal reflection mode, and the coupling-out area receives the conductive light and couples the conductive light out of the optical waveguide unit to form output image light.
3. A display device for removing reflected light according to claim 1 or 2, wherein the polarized light comprises linearly polarized light, circularly polarized light or other polarized light.
4. A display device for removing reflected light according to claim 1 or 2, wherein the light of the first polarization characteristic comprises left-handed or right-handed circularly polarized light.
5. A display device for eliminating reflected light according to claim 3, wherein the polarizing plate is configured to change incident unpolarized natural light into P-polarized linear polarized light and absorb S-polarized light component having a vibration direction perpendicular to a transmission direction of the polarizing plate, wherein the unpolarized natural light is modulated by the polarizing plate to form P-polarized linear polarized light after being incident on the polarizing plate, the linear polarized light is passed through the wave plate to form first polarized characteristic light, the first polarized characteristic light is reflected by the reflecting element and then is incident on the wave plate again, and the first polarized characteristic light is passed through the wave plate to form S-polarized linear polarized light which can be absorbed by the polarizing plate and is absorbed by the polarizing plate.
6. The display device for removing reflected light according to claim 4, wherein the polarizing plate comprises an absorption type polarizing plate or a crystal having a selective absorption function for electromagnetic vibration in different directions.
7. The display device for removing reflected light according to claim 4, wherein the reflective element comprises a metal reflective film, a dielectric film, or a metal-dielectric composite film.
8. A display device for eliminating reflected light according to claim 3, wherein the polarizing plate is configured to change incident unpolarized natural light into S-polarized linear polarized light and absorb a P-polarized linear polarized light component having a vibration direction perpendicular to a transmission direction of the polarizing plate, wherein the unpolarized natural light is modulated by the polarizing plate to form S-polarized linear polarized light after being incident on the polarizing plate, the linear polarized light is passed through the wave plate to form first polarized characteristic light, the first polarized characteristic light is reflected by the reflecting element and is incident on the wave plate again, and the first polarized characteristic light is passed through the wave plate to form P-polarized linear polarized light which can be absorbed by the polarizing plate and is absorbed by the polarizing plate.
9. The display device for removing reflected light according to claim 7, wherein the polarizing plate comprises an absorption type polarizing plate or a crystal having a selective absorption function for electromagnetic vibration in different directions.
10. The display device for removing reflected light according to claim 7, wherein the reflective element comprises a metal reflective film, a dielectric film, or a metal-dielectric composite film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311351388.5A CN117192780A (en) | 2023-10-18 | 2023-10-18 | Display device for eliminating reflected light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311351388.5A CN117192780A (en) | 2023-10-18 | 2023-10-18 | Display device for eliminating reflected light |
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| Publication Number | Publication Date |
|---|---|
| CN117192780A true CN117192780A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311351388.5A Pending CN117192780A (en) | 2023-10-18 | 2023-10-18 | Display device for eliminating reflected light |
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|---|---|
| CN (1) | CN117192780A (en) |
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- 2023-10-18 CN CN202311351388.5A patent/CN117192780A/en active Pending
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