Display system

Abstract

The invention relates to a display system which comprises a display assembly and an optical assembly, the display assembly comprises at least one first display area and at least one second display area, the first display area emits first circularly polarized light, and the second display area emits second circularly polarized light. The rotation direction of the first circularly polarized light is different from that of the second circularly polarized light; the optical assembly is arranged on the light emitting side of the display assembly, and the optical assembly is configured to reflect the first circularly polarized light and transmit the second circularly polarized light. The display system can improve readability and resolution of information displayed by a head-up display (HUD) system, and improve influence of ambient light in a bright environment on the display effect of the whole HUD system.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display system. Background Art

[0002] The main function of the Head Up Display (HUD) is to project important information into the user's field of vision, so that the user can obtain the required information without lowering his head or shifting his gaze, thereby improving safety and efficiency. The car's HUD can display speed, navigation information, warning prompts, etc., to help the driver keep his attention on the road, reduce the number of times the user lowers his head to check information, reduce the risk of accidents, and provide real-time information to help users make faster and more accurate decisions. However, the readability and resolution of existing HUDs are poor, and the display effect of HUDs in bright environments is also greatly affected by ambient light. Summary of the invention

[0003] The embodiment of the present application provides a display system, which can improve the readability and resolution of information displayed by a head-up display (HUD) system, and improve the influence of ambient light in a bright environment on the display effect of the entire HUD system.

[0004] In order to achieve the above object, the present application provides a display system, comprising:

[0005] The display component comprises at least one first display area and at least one second display area, the first display area emits a first circularly polarized light, the second display area emits a second circularly polarized light, and a rotation direction of the first circularly polarized light is different from a rotation direction of the second circularly polarized light; and

[0006] The optical component is disposed on the light-emitting side of the display component, and the optical component is configured to reflect the first circularly polarized light and transmit the second circularly polarized light.

[0007] In some embodiments, the first display area is an image display area, and the second display area is a non-image display area.

[0008] In some embodiments, the display assembly includes:

[0009] a liquid crystal display panel configured to emit a first linearly polarized light;

[0010] a light-controlling liquid crystal cell, disposed on a light-exiting side of the liquid crystal display panel, configured to convert the first linear polarized light of the first display area into a second linear polarized light, and convert the first linear polarized light of the second display area into a third linear polarized light, wherein the polarization direction of the second linear polarized light is parallel to the polarization direction of the first linear polarized light, and the polarization direction of the third linear polarized light intersects with the polarization direction of the first linear polarized light; and

[0011] The quarter wave plate is arranged on a side of the light control liquid crystal box away from the liquid crystal display panel, and is configured to convert the second linear polarized light into the first circular polarized light, and convert the third linear polarized light into the second circular polarized light.

[0012] In some embodiments, the light-controlling liquid crystal cell comprises:

[0013] A first substrate and a second substrate arranged opposite to each other;

[0014] A first liquid crystal layer is disposed between the first substrate and the second substrate;

[0015] a first electrode layer, disposed between the first substrate and the first liquid crystal layer; and

[0016] The second electrode layer is arranged between the second substrate and the first liquid crystal layer.

[0017] In some embodiments, at least one of the first electrode layer and the second electrode layer includes metal conductive blocks arranged in an array, the liquid crystal display panel includes pixels arranged in an array, and the first display area or the second display area includes at least one of the pixels;

[0018] The metal conductive blocks correspond to the pixels one by one, and the orthographic projection of the metal conductive blocks on the liquid crystal display panel covers the corresponding pixels.

[0019] In some embodiments, at least one of the first electrode layer and the second electrode layer comprises a metal conductive mesh.

[0020] In some embodiments, when one of the first electrode layer and the second electrode layer is the metal conductive block, the other is a whole-surface metal conductive film;

[0021] Alternatively, when one of the first electrode layer and the second electrode layer is the metal conductive mesh, the other is a full-surface metal conductive film.

[0022] In some embodiments, the optical component includes a substrate and a light control structure located on one side of the substrate, wherein the light control structure is configured to reflect the first circularly polarized light and transmit the second circularly polarized light;

[0023] The light-controlling structure includes a light-controlling material, the light-controlling material has a spiral structure, and the spiral direction of the spiral structure is the same as the rotation direction of the first circularly polarized light.

[0024] In some embodiments, the light-controlling structure is a light-controlling film, the light-controlling film includes the light-controlling material, the light-controlling material includes a spiral metamaterial, and the spiral metamaterial has the spiral structure.

[0025] In some embodiments, the light control structure is a cholesteric liquid crystal cell, and the cholesteric liquid crystal cell includes:

[0026] A third substrate and a fourth substrate arranged opposite to each other;

[0027] A second liquid crystal layer is disposed between the third substrate and the fourth substrate;

[0028] a third electrode layer, disposed between the third substrate and the second liquid crystal layer; and

[0029] a fourth electrode layer, disposed between the fourth substrate and the second liquid crystal layer;

[0030] Wherein, the second liquid crystal layer includes the light control material, the light control material is cholesteric liquid crystal, and the cholesteric liquid crystal has the spiral structure.

[0031] The display system provided in the embodiment of the present application is used for head-up display. The display system of the present application includes a display component and an optical component, wherein the display component includes a first display area and a second display area, the first display area emits a first circularly polarized light, and the second display area emits a second circularly polarized light. The optical component can reflect the first circularly polarized light to the observer and transmit the second circularly polarized light, which can improve the contrast of the content displayed in the first display area and the second display area, thereby improving the readability and resolution of the HUD display information; at the same time, since the ambient light is usually non-polarized light, after passing through the optical component, the reflected part of the ambient light is greatly reduced, thereby reducing the influence of the ambient light on the HUD display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0033] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0034] Figure 1 is a structural schematic diagram of a display system provided in an embodiment of the present application;

[0035] Figure 2 is a schematic structural diagram of a display assembly provided in an embodiment of the present application when the light-controlling liquid crystal box is not driven;

[0036] Figure 3is a schematic structural diagram of a display assembly provided in an embodiment of the present application in a light-controlling liquid crystal box driving state;

[0037] Figure 4 is a schematic diagram of a light change process corresponding to an image display area of ​​a display system provided in an embodiment of the present application;

[0038] Figure 5 is a schematic diagram of a light change process corresponding to a non-image display area of ​​a display system provided in an embodiment of the present application;

[0039] Figure 6 is a structural schematic diagram of a light-control liquid crystal box provided in an embodiment of the present application;

[0040] Figure 7 It is a schematic diagram of the planar structure of a first electrode layer of a light-control liquid crystal cell provided in an embodiment of the present application;

[0041] Figure 8 is a schematic diagram of the planar structure of a first electrode layer of another light-control liquid crystal cell provided in an embodiment of the present application;

[0042] Fig. 9 is a schematic diagram of the structure of the spiral metamaterial provided in an embodiment of the present application;

[0043] Fig.10 It is a structural schematic diagram of a cholesteric liquid crystal box in which the light control structure provided in an embodiment of the present application is a cholesteric liquid crystal box.

[0044] Description of reference numerals:

[0045] 100, display component; 110, liquid crystal display panel; 111, first polarizer; 112, array substrate; 113, liquid crystal layer; 114, color filter substrate; 115, second polarizer; 116, backlight module; 120, light control liquid crystal box; 121, first substrate; 122, first electrode layer; 1221, metal conductive block; 1222, metal conductive mesh; 123, first liquid crystal layer; 124, second electrode layer; 125, second substrate; 1 26. signal line; 127. driving end; 130. quarter wave plate; 200. optical component; 210. substrate; 220. light control structure; 221. third substrate; 222. third electrode layer; 223. second liquid crystal layer; 224. fourth electrode layer; 225. fourth substrate; 101. first linear polarized light; 102. second linear polarized light; 103. third linear polarized light; 104. first circularly polarized light; 105. second circularly polarized light. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] See also Figure 1-Figure 3 The present application provides a display system, which includes a display component 100 and an optical component 200; the display component 100 includes at least one first display area A and at least one second display area N, the first display area A emits a first circularly polarized light 104, the second display area N emits a second circularly polarized light 105, and the rotation direction of the first circularly polarized light 104 is different from the rotation direction of the second circularly polarized light 105; the optical component 200 is arranged on the light output side of the display component 100, and the optical component 200 is configured to reflect the first circularly polarized light 104 and transmit the second circularly polarized light 105.

[0048] The first display area A may be an image display area, and the second display area N may be a non-image display area. The image display area may be an area for displaying text, characters or images, such as important information such as speed, navigation information, warning prompts, etc., and the non-image display area may be a background display area. The image display area emits the first circularly polarized light 104, and the non-image display area emits the second circularly polarized light 105. The rotation direction of the first circularly polarized light 104 is different from the rotation direction of the second circularly polarized light 105. The optical component 200 reflects the first circularly polarized light 104 emitted by the image display area, and transmits the second circularly polarized light 105 of the non-image display area, thereby improving the contrast between the image display area and the non-image display area on the imaging surface, thereby improving the readability and resolution of the displayed information in the image display area.

[0049] The display system of the present application can be used for other remote image displays such as head-up display (HUD). For ease of understanding, the following description will be given using the head-up display (HUD) as an example, wherein the display component 100 is used to provide a display image, and the light emitted by the display component 100 is projected onto the optical component 200. The optical component 200 reflects the light emitted by the display component 100 to the human eye, so that the human eye can see the virtual image through the display component 100, thereby allowing people to see the information of the display image without lowering their heads.

[0050] In the present application, the image display area of ​​the display component 100 can emit a first circularly polarized light 104, and the non-image display area can emit a second circularly polarized light 105. In order to distinguish the light emitted by the image display area from the light emitted by the non-image display area, the present application makes the rotation direction of the first circularly polarized light 104 different from the rotation direction of the second circularly polarized light 105. For example, the first circularly polarized light 104 can be left-handed circularly polarized light, and the second circularly polarized light 105 can be right-handed circularly polarized light, or the first circularly polarized light 104 can be right-handed circularly polarized light, and the second circularly polarized light 105 can be left-handed circularly polarized light, which is not limited in the present application.

[0051] In some embodiments, see Figure 2-Figure 5 The display component 100 includes a liquid crystal display panel 110, a light-controlling liquid crystal box 120, and a quarter-wave plate 130. The liquid crystal display panel 110 is configured to emit a first linear polarized light 101; the light-controlling liquid crystal box 120 is arranged at the light-emitting side of the display panel, and is configured to convert the first linear polarized light 101 of the first display area into a second linear polarized light 102, and convert the first linear polarized light 101 of the second display area into a third linear polarized light 103, wherein the second linear polarized light 102 is parallel to the direction of the first linear polarized light 101, and the third linear polarized light 103 intersects with the direction of the first linear polarized light 101; the quarter-wave plate 130 is arranged at a side of the light-controlling liquid crystal box 120 away from the display panel, and is configured to convert the second linear polarized light 102 into the first circularly polarized light 104, and convert the third linear polarized light 103 into the second circularly polarized light 105.

[0052] The liquid crystal display panel 110 is used to provide a display image. Figure 2-Figure 3The liquid crystal display panel 110 includes a first polarizer 111, an array substrate 112, a liquid crystal layer 113, a color filter substrate 114, and a second polarizer 115. The array substrate 112 is located on a side of the first polarizer 111 close to the light control liquid crystal box 120, the liquid crystal layer 113 is located on a side of the array substrate 112 away from the first polarizer 111, the color filter substrate 114 is located on a side of the liquid crystal layer 113 away from the array substrate 112, and is arranged opposite to the array substrate 112, and the second polarizer 115 is located on a side of the color filter substrate 114 away from the liquid crystal layer 113. In the present application, the liquid crystal display panel 110 may be a twisted nematic (TN), electrically controlled birefringence (ECB), or vertical alignment (VA) type liquid crystal display panel, but is not limited thereto.

[0053] Furthermore, the display assembly 100 further includes a backlight module 116 , which is located on a side of the liquid crystal display panel 110 away from the light-controlling liquid crystal box 120 and is used to provide a backlight source for the liquid crystal display panel 110 .

[0054] The quarter-wave plate 130 (Quarter-Wave Plate, QWP) is a birefringent material having two different refractive indices: one along the fast axis (Fast Axis) and one along the slow axis (Slow Axis). When linearly polarized light passes through the 1 / 4 wave plate, the electric field vector of the light can be decomposed into two components along the fast axis and the slow axis. Among them, the fast axis (Fast Axis) means that the light propagates faster in this direction and has a lower refractive index. The slow axis (Slow Axis) means that the light propagates slower in this direction and has a higher refractive index. When linearly polarized light is incident on the 1 / 4 wave plate at an angle of 45°, the electric field vector can be decomposed into two components along the fast axis and the slow axis. These two components will produce a phase difference of 90° (1 / 4 wavelength) after passing through the 1 / 4 wave plate, thereby forming circularly polarized light. If the phase delay of the fast axis is less than the phase delay of the slow axis (i.e., the light wave of the fast axis arrives first), the outgoing light is right-handed circularly polarized light. If the phase delay of the slow axis is less than the phase delay of the fast axis (i.e., the light wave of the slow axis arrives first), the outgoing light is left-handed circularly polarized light. In the present application, the polarization direction of the second linear polarized light 102 forms an angle of 45° with the optical axis plane of the quarter wave plate 130, so that the second linear polarized light 102 forms the first circularly polarized light 104 after passing through the quarter wave plate 130, and the polarization direction of the third linear polarized light 103 forms an angle of 45° with the optical axis plane of the quarter wave plate 130, so that the third linear polarized light 103 forms the second circularly polarized light 105 after passing through the quarter wave plate 130.

[0055] The light-controlling liquid crystal box 120 is a liquid crystal half-wave plate, which is also referred to as a liquid crystal electrically controlled half-wave plate. It controls the propagation speed of light in the liquid crystal box by changing the intensity of the electric field, thereby achieving precise control of the phase of the light wave. For example, when the electric field intensity is adjusted to a specific value, the phase delay of the incident light reaches half a wave (π), and the polarization direction of the light will rotate 90°. In the present application, the polarization direction of the first linear polarized light 101 in the non-image display area is deflected by 90° after passing through the liquid crystal half-wave plate, so that the third linear polarized light 103 is perpendicular to the direction of the first linear polarized light 101.

[0056] Specifically, the light-controlling liquid crystal box 120 is disposed on the light-emitting side of the display panel, and is configured to convert the first linear polarized light 101 in the image display area into the second linear polarized light 102, and convert the first linear polarized light 101 in the non-image display area into the third linear polarized light 103, wherein the second linear polarized light 102 is parallel to the direction of the first linear polarized light 101, and the third linear polarized light 103 is perpendicular to the direction of the first linear polarized light 101.

[0057] See also Figure 6The light-controlling liquid crystal box 120 includes a first substrate 121, a first electrode layer 122, a first liquid crystal layer 123, a second electrode layer 124 and a second substrate 125. The first electrode layer 122 is arranged on a side of the first substrate 121 away from the liquid crystal display panel 110; the second electrode layer 124 is arranged on a side of the first electrode layer 122 away from the first substrate 121; the first liquid crystal layer 123 is arranged between the first electrode layer 122 and the second electrode layer 124; the second substrate 125 is arranged on a side of the second electrode layer 124 away from the first liquid crystal layer 123, and is arranged opposite to the first substrate 121. In the present application, the light-controlling liquid crystal box 120 may be a passive liquid crystal box, but is not limited thereto. The first substrate 121 and the second substrate 125 may be glass substrates or flexible substrate materials. By applying voltage to the first electrode layer 122 and the second electrode layer 124, the arrangement direction of the liquid crystal molecules changes under the action of the electric field, thereby changing its optical properties to achieve light control. In the present application, the polarization direction of the first linear polarized light 101 emitted by the liquid crystal display panel 110 is changed by controlling the light-controlling liquid crystal box 120 .

[0058] In some embodiments, the first electrode layer 122 or the second electrode layer 124 may be a whole-surface metal conductive film, and the material of the metal conductive film may be indium tin oxide (ITO), but is not limited thereto.

[0059] In some embodiments, see Figure 7, at least one of the first electrode layer 122 and the second electrode layer 124 is a metal conductive block 1221 arranged in an array. The liquid crystal display panel 110 includes pixels arranged in an array, the first display area includes at least one of the pixels, and the second display area includes at least one of the pixels. The metal conductive blocks 1221 correspond to the pixels one by one, and the orthographic projection of the metal conductive blocks 1221 on the liquid crystal display panel 110 covers the corresponding pixels. Each of the metal conductive blocks 1221 arranged in an array is connected to a driving end 127 through a signal line 126, and the driving end 127 includes components such as a flexible printed circuit board (FPC) and a driving chip (IC), and each of the metal conductive blocks 1221 can be independently controlled. The driving circuit of the liquid crystal display panel 110 is associated with the driving circuit of the light control liquid crystal box 120. When the driving chip sends a signal, the driving circuit of the liquid crystal display panel 110 controls the pixels of the image display area to emit light to display the picture, and drives the electrode layer of the image display area or the non-image display area of ​​the light control liquid crystal box 120 in a partitioned manner, so as to change the polarization direction of the first linear polarized light 101 in the image display area or the non-image display area after passing through the light control liquid crystal box 120. For example, by not driving the metal conductive block 1221 in the image display area and driving the metal conductive block 1221 in the non-image display area, the polarization direction of the first linear polarized light 101 in the image display area after passing through the light control liquid crystal box 120 is parallel to the polarization direction of the first linear polarized light 101, and the polarization direction of the first linear polarized light 101 in the non-image display area after passing through the light control liquid crystal box 120 is deflected by 90° relative to the polarization direction of the first linear polarized light 101. The material of the metal conductive blocks 1221 may be indium tin oxide (ITO), and the array-arranged metal conductive blocks 1221 may be patterned by an exposure and etching process, but is not limited thereto.

[0060] In one embodiment, the first electrode layer 122 of the light-control liquid crystal box 120 is an array of metal conductive blocks 1221, and the second electrode layer 124 is a whole surface of a metal conductive film. The materials of the metal conductive blocks 1221 and the metal conductive film are both ITO. Figure 7The first electrode layer 122 includes a plurality of ITO metal conductive blocks 1221 arranged in an array, and each of the metal conductive blocks 1221 is connected to the FPC end through a signal line 126 to achieve independent driving of each of the metal conductive blocks 1221. By applying voltage to the metal conductive blocks 1221 and the second electrode layer 124 in the non-image display area, the non-image display area can be driven, and the polarization direction of the first linear polarized light 101 incident on the non-image display area can be changed to obtain the third linear polarized light 103.

[0061] In some embodiments, see Figure 8 At least one of the first electrode layer 122 and the second electrode layer 124 is a metal conductive mesh 1222. The metal conductive mesh 1222 can achieve regional control by applying voltage / current to different areas of the metal conductive mesh 1222, or not applying voltage / current, so as to achieve partition driving of the electrode layer of the image display area or the non-image display area of ​​the light-control liquid crystal box 120. The partition driving principle of the metal conductive mesh 1222 is similar to the partition driving principle of the above-mentioned metal conductive block 1221, which will not be repeated here.

[0062] In one embodiment, the first electrode layer 122 of the light-control liquid crystal cell 120 is the metal conductive mesh 1222, and the second electrode layer 124 is a whole metal conductive film, and the material of the metal conductive film is ITO. Figure 8 The metal conductive mesh 1222 is composed of metal wires, and the metal wires are connected to the driving end through signal lines 126. The regional control of the metal conductive mesh 1222 can be achieved by controlling the current transmission path. By applying voltage / current to the metal conductive mesh 1222 and the second electrode layer 124 in the non-image display area, the non-image display area can be driven, and the polarization direction of the first linear polarized light 101 incident to the non-image display area can be changed to obtain the third linear polarized light 103.

[0063] In some embodiments, please refer to Figure 1, the optical component 200 includes a substrate 210 and a light control structure 220 located on one side of the substrate 210, wherein the substrate 210 can be glass, such as a windshield of a car, and the light control structure 220 is arranged on a side of the substrate 210 close to the display component 100, for example, the light control structure 220 can be arranged on the inner side of the windshield. The light control structure 220 has the characteristic of selective reflection, which can reflect circularly polarized light in a certain direction and transmit circularly polarized light in other directions. In the present application, the light control structure 220 can reflect the first circularly polarized light 104 and transmit the second circularly polarized light 105, that is, the light control structure 220 can reflect the light emitted from the image display area of ​​the display component 100 and transmit the light emitted from the non-image display area, so that the contrast between the image area and the non-image area on the imaging surface of the substrate 210 can be improved, thereby improving the readability and resolution of the information displayed by the HUD system. In addition, since ambient light is usually non-polarized light, after passing through the light control structure 220, the reflected part of the ambient light is greatly reduced, reducing the intensity of the reflected ambient light and the proportion of the ambient light reflection, thereby reducing the impact of ambient light on the HUD display effect.

[0064] In some embodiments, the light control structure 220 includes a light control material, the light control material has a spiral structure, and the spiral direction of the spiral structure is the same as the rotation direction of the first circularly polarized light 104. The light control material has the property of reflecting circularly polarized light with the same spiral direction as the light control material, and transmitting circularly polarized light with the opposite spiral direction as the light control material. Therefore, the light control structure 220 composed of the light control material can reflect the first circularly polarized light 104 with the same spiral direction as the light control material, and transmit the second circularly polarized light 105 with the opposite spiral direction as the light control material.

[0065] In some embodiments, the light control structure 220 is a light control film, and the light control film includes the light control material. The light control film can be an optical film layer formed by the light control material, and the light control material can be a spiral metamaterial, and the spiral metamaterial has the spiral structure. Fig. 9 The composite spiral structure of the spiral metamaterial has a high circular conversion dichroism, wherein the circular conversion dichroism refers to the different conversion efficiencies of two circularly polarized lights with opposite rotation directions. The spiral metamaterial can form a micron-sized composite spiral structure using molecular self-assembly technology, and the different conversion efficiencies of the spiral metamaterial for different circularly polarized lights can be achieved by adjusting the pitch, spiral period, spiral diameter, etc. of the spiral structure. The present application utilizes the circular conversion dichroism of the spiral metamaterial to selectively transmit and reflect two circularly polarized lights with opposite rotation directions, so as to achieve the reflection of the first circularly polarized light 104 and the transmission of the second circularly polarized light 105.

[0066] Specifically, when the first circularly polarized light 104 is left-handed circularly polarized light and the second circularly polarized light 105 is right-handed circularly polarized light, the light control film reflects the left-handed circularly polarized light and transmits the right-handed circularly polarized light. Alternatively, when the first circularly polarized light 104 is right-handed circularly polarized light and the second circularly polarized light 105 is left-handed circularly polarized light, the light control film reflects the right-handed circularly polarized light and transmits the left-handed circularly polarized light.

[0067] In some embodiments, the light control structure 220 can be a cholesteric liquid crystal box, which includes the light control material, and the light control material is a cholesteric liquid crystal, and the cholesteric liquid crystal has the spiral structure. The cholesteric liquid crystal is a liquid crystal system in which a chiral agent is added to the liquid crystal. The cholesteric liquid crystal molecules are arranged in a spiral structure. The pitch of this spiral structure determines its selective reflection characteristics for light of a specific wavelength. The cholesteric liquid crystal has a selective reflection characteristic for circularly polarized light with the same spiral direction as the cholesteric liquid crystal, and transmits circularly polarized light with the opposite spiral direction. The present application utilizes the selective reflection characteristic of the cholesteric liquid crystal to selectively transmit and reflect two circularly polarized lights with opposite rotation directions, so as to achieve the reflection of the first circularly polarized light 104 and transmit the second circularly polarized light 105.

[0068] Specifically, when the first circularly polarized light 104 is left-handed circularly polarized light and the second circularly polarized light 105 is right-handed circularly polarized light, the cholesteric liquid crystal box may select left-handed cholesteric liquid crystal, and the left-handed cholesteric liquid crystal reflects left-handed circularly polarized light and transmits right-handed circularly polarized light. Alternatively, when the first circularly polarized light 104 is right-handed circularly polarized light and the second circularly polarized light 105 is left-handed circularly polarized light, the cholesteric liquid crystal box may select right-handed cholesteric liquid crystal, and the right-handed cholesteric liquid crystal reflects right-handed circularly polarized light and transmits left-handed circularly polarized light.

[0069] For further information, see Fig.10The cholesteric liquid crystal box includes a third substrate 221, a third electrode layer 222, a second liquid crystal layer 223, a fourth electrode layer 224 and a fourth substrate 225. The third electrode layer 222 is arranged on a side of the third substrate 221 away from the substrate 210; the fourth electrode layer 224 is arranged on a side of the third electrode layer 222 away from the third substrate 221; the second liquid crystal layer 223 is arranged between the third electrode layer 222 and the fourth electrode layer 224, and the second liquid crystal layer 223 includes cholesteric liquid crystal; the fourth substrate 225 is arranged on a side of the fourth electrode layer 224 away from the second liquid crystal layer 223, and is arranged opposite to the third substrate 221. The third substrate 221 and the fourth substrate 225 can be glass substrates or flexible substrate materials. By applying voltage to the third electrode layer 222 and the fourth electrode layer 224 to change the state of the cholesteric liquid crystal, and using the electric field to control the pitch of the cholesteric liquid crystal, it can be made to reflect light of a specific wavelength, thereby achieving the cholesteric liquid crystal reflecting the first circularly polarized light 104 and allowing the second circularly polarized light 105 to pass through.

[0070] In some embodiments, the cholesteric liquid crystal may be a wide-band cholesteric liquid crystal material, which can achieve strong reflection of light in the visible light band.

[0071] The display component 100 of the present application includes an image display area and a non-image display area, and the image displayed in the image display area is information or a pattern to be seen by the observer. The present application converts the linear polarized light emitted by the non-image display through the light control liquid crystal box 120, so that the polarization direction of the linear polarized light emitted by the non-image display area is different from the polarization direction of the linear polarized light emitted by the image display area, so that after passing through the quarter-wave plate 130, the circular polarized light emitted by the non-image display area has a different rotation direction from the circular polarized light emitted by the image display area, and then the circular polarized light emitted by the image display area is reflected by the light control structure 220, and the circular polarized light emitted by the non-image display area is transmitted, so as to improve the contrast between the image display area and the non-image display area.

[0072] For details, please refer to Figure 2 and Figure 4, in the image display area, the light emitted by the backlight module 116 emits a first linear polarized light 101 after passing through the liquid crystal display panel 110, and the polarization direction of the first linear polarized light 101 is the same as the polarization axis direction of the second polarizer 115. For example, if the polarization axis direction of the second polarizer 115 is the first direction Y, then the polarization direction of the first linear polarized light 101 is the first direction Y. After passing through the light-controlling liquid crystal box 120, the first linear polarized light 101 emits the second linear polarized light 102. When the light-controlling liquid crystal box 120 is not driven, the polarization direction of the second linear polarized light 102 is the same as the polarization direction of the first linear polarized light 101, that is, the polarization direction of the second linear polarized light 102 is still the first direction Y. After passing through the quarter-wave plate 130, the second linear polarized light 102 forms the first circularly polarized light 104, and the first circularly polarized light 104 is left-handed circularly polarized light.

[0073] See also Figure 3 and Figure 6 In the non-image display area, the light emitted by the backlight module 116 emits the first linear polarized light 101 after passing through the liquid crystal display panel 110. The polarization direction of the first linear polarized light 101 is the same as the polarization axis direction of the second polarizer 115. For example, the polarization axis direction of the second polarizer 115 is the first direction Y, and the polarization direction of the first linear polarized light 101 is the first direction Y. The first linear polarized light 101 emits the third linear polarized light 103 after passing through the light-controlling liquid crystal box 120. Under the condition that the light-controlling liquid crystal box 120 is driven, the polarization direction of the third linear polarized light 103 is rotated by 90° relative to the polarization direction of the first linear polarized light 101, that is, the polarization direction of the third linear polarized light 103 is the second direction X. The third linear polarized light 103 forms the second circularly polarized light 105 after passing through the quarter-wave plate 130. The second circularly polarized light 105 is right-handed circularly polarized light.

[0074] The first circularly polarized light 104 and the second circularly polarized light 105 emitted by the quarter wave plate 130 are projected onto the light control structure 220, and the light control structure 220 can reflect the left-handed first circularly polarized light 104 and transmit the right-handed second circularly polarized light 105, so as to improve the contrast between the image display area and the non-image display area, thereby improving the readability and resolution of the information displayed in the image display area.

[0075] In summary, the present application provides a display system that can be used for head-up display. The display system of the present application includes a display component and an optical component, wherein the display component includes a first display area and a second display area, the first display area emits a first circularly polarized light, and the second display area emits a second circularly polarized light. The optical component can reflect the first circularly polarized light to the observer and transmit the second circularly polarized light, which can improve the contrast of the content displayed in the first display area and the second display area, thereby improving the readability and resolution of the HUD display information; at the same time, since the ambient light is usually non-polarized light, after passing through the optical component, the reflected part of the ambient light is greatly reduced, thereby reducing the influence of the ambient light on the HUD display effect.

[0076] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0077] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0078] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0079] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display system, characterized in that: include: The display component comprises at least one first display area and at least one second display area, the first display area emits a first circularly polarized light, the second display area emits a second circularly polarized light, and the rotation direction of the first circularly polarized light is different from the rotation direction of the second circularly polarized light; as well as The optical component is disposed on the light-emitting side of the display component, and the optical component is configured to reflect the first circularly polarized light and transmit the second circularly polarized light.

2. The display system according to claim 1, characterized in that: The first display area is an image display area, and the second display area is a non-image display area.

3. The display system according to claim 1, characterized in that: The display assembly comprises: a liquid crystal display panel configured to emit a first linearly polarized light; a light-controlling liquid crystal cell, disposed on a light-exiting side of the liquid crystal display panel, configured to convert the first linear polarized light of the first display area into a second linear polarized light, and convert the first linear polarized light of the second display area into a third linear polarized light, wherein the polarization direction of the second linear polarized light is parallel to the polarization direction of the first linear polarized light, and the polarization direction of the third linear polarized light intersects with the polarization direction of the first linear polarized light; and A quarter wave plate is arranged on a side of the light-controlling liquid crystal cell away from the liquid crystal display panel, and is configured to convert the second linear polarized light into the first circular polarized light, and convert the third linear polarized light into the second circular polarized light.

4. The display system according to claim 3, characterized in that: The light-controlling liquid crystal box comprises: A first substrate and a second substrate arranged opposite to each other; A first liquid crystal layer is disposed between the first substrate and the second substrate; a first electrode layer, disposed between the first substrate and the first liquid crystal layer; and The second electrode layer is arranged between the second substrate and the first liquid crystal layer.

5. The display system according to claim 4, characterized in that: At least one of the first electrode layer and the second electrode layer includes metal conductive blocks arranged in an array, the liquid crystal display panel includes pixels arranged in an array, and the first display area or the second display area includes at least one of the pixels; The metal conductive blocks correspond to the pixels one by one, and the orthographic projection of the metal conductive blocks on the liquid crystal display panel covers the corresponding pixels.

6. The display system according to claim 4, characterized in that: At least one of the first electrode layer and the second electrode layer includes a metal conductive mesh.

7. The display system according to claim 5 or 6, characterized in that: When one of the first electrode layer and the second electrode layer is the metal conductive block, the other is a whole-surface metal conductive film; Alternatively, when one of the first electrode layer and the second electrode layer is the metal conductive mesh, the other is a full-surface metal conductive film.

8. The display system according to claim 1, characterized in that: The optical component includes a substrate and a light control structure located on one side of the substrate, wherein the light control structure is configured to reflect the first circularly polarized light and transmit the second circularly polarized light; The light-controlling structure includes a light-controlling material, the light-controlling material has a spiral structure, and the spiral direction of the spiral structure is the same as the rotation direction of the first circularly polarized light.

9. The display system according to claim 8, characterized in that: The light-controlling structure is a light-controlling film, the light-controlling film includes the light-controlling material, the light-controlling material includes a spiral metamaterial, and the spiral metamaterial has the spiral structure.

10. The display system according to claim 8, characterized in that: The light control structure is a cholesteric liquid crystal cell, and the cholesteric liquid crystal cell comprises: A third substrate and a fourth substrate arranged opposite to each other; A second liquid crystal layer is disposed between the third substrate and the fourth substrate; a third electrode layer, disposed between the third substrate and the second liquid crystal layer; and a fourth electrode layer, disposed between the fourth substrate and the second liquid crystal layer; Wherein, the second liquid crystal layer includes the light control material, the light control material is cholesteric liquid crystal, and the cholesteric liquid crystal has the spiral structure.

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