Optical display device, preparation method of optical display device and head-up display system

Abstract

The invention discloses optical display equipment, a preparation method of the optical display equipment and a head-up display system. The optical display device includes: a display structure; the display structure comprises a color filter layer, an upper polaroid and a grating structure; the upper polaroid is arranged on one side of the light emitting surface of the color filter layer; the grating structure is arranged between the color filter layer and the upper polaroid or arranged on one side, far away from the color filter layer, of the upper polaroid, and is used for changing the propagation direction of emergent light rays and dividing the emergent light rays into left eye imaging light rays and right eye imaging light rays with different angles to be emitted. According to the technical scheme, the display structure and the grating structure are arranged in the optical display device, the grating structure is arranged on the light-emitting face side of the color filter layer or arranged on the side, away from the color filter layer, of the upper polaroid, design of a 3D display screen with higher angular resolution is better facilitated, and the degree of freedom of optical design is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D display, in particular to an optical display device, a preparation method of the optical display device and a head-up display system. BACKGROUND

[0002] Naked eye 3D display technology is to let users see three-dimensional effect of a two-dimensional picture or video by naked eyes without any external devices such as 3D glasses. Generally, the naked eye 3D display technology is to paste a grating on a liquid crystal screen, and to divide the pixels covered by the grating into pixels for left eye and right eye of a user by using the technology of the grating. When the left eye and the right eye of a person watch the screen, they will see two groups of pixels respectively, thereby generating parallax, and the user can watch the image with 3D display effect.

[0003] In the prior art, a grating is generally processed on a substrate first, and then the grating is precisely pasted on a liquid crystal screen by an adhesive process, so as to finally realize naked eye 3D effect. However, the naked eye 3D display structure prepared by this method will affect the angular resolution of the 3D display structure due to the existence of a certain thickness of adhesive layer between the liquid crystal screen and the grating. SUMMARY

[0004] The present application provides an optical display device, a preparation method of the optical display device and a head-up display system, so as to solve the problem of affecting the angular resolution in the prior art by directly pasting the grating on the liquid crystal screen.

[0005] According to a first aspect of the present application, an optical display device is provided, comprising: a display structure;

[0006] The display structure comprises a color filter layer, an upper polarizer and a grating structure;

[0007] The upper polarizer is arranged on a light-out surface side of the color filter layer;

[0008] The color filter layer is used for screening out the light rays of a specific wave band to the upper polarizer, and the upper polarizer is used for screening out the light rays consistent with the polarization direction of the upper polarizer from the display structure;

[0009] The grating structure is arranged between the color filter layer and the upper polarizer or on a side of the upper polarizer away from the color filter layer, and is used for changing the propagation direction of the light rays and dividing them into left-eye imaging light rays and right-eye imaging light rays of different angles.

[0010] Optionally, an infrared cut-off filter is further included;

[0011] The infrared cut-off filter is arranged on a side of the upper polarizer close to the color filter layer, and is used for filtering the infrared wave band light rays entering the display structure.

[0012] Optionally, the display structure further comprises a backlight module, a lower polarizer, a thin film transistor and a liquid crystal layer which are sequentially stacked; and the color filter layer is located on a light emitting surface side of the liquid crystal layer.

[0013] The lower polarizer is used for converting natural light emitted by the backlight module into polarized light.

[0014] According to a second aspect of the present application, a preparation method of an optical display device is provided for preparing an optical display device; the preparation method comprises:

[0015] obtaining a display screen; wherein the display screen comprises a color filter layer and an upper polarizer which are stacked;

[0016] peeling off the upper polarizer on a surface of the display screen;

[0017] preparing a grating structure on a surface of the color filter layer close to the upper polarizer to form a display structure; or preparing a grating structure on a surface of the upper polarizer away from the color filter layer to form a display structure.

[0018] Optionally, the preparing of the grating structure on the surface of the color filter layer close to the upper polarizer comprises:

[0019] pointing glue on the surface of the color filter layer close to the upper polarizer to form a glue layer;

[0020] pressing the glue layer to form the grating structure.

[0021] Optionally, after the obtaining of the display screen, the method further comprises:

[0022] setting an infrared cut-off filter along a light emitting direction of the display screen.

[0023] Optionally, after the peeling off of the upper polarizer on the surface of the display screen, the method further comprises:

[0024] setting the upper polarizer on a side of the infrared cut-off filter away from the color filter layer.

[0025] Optionally, the preparing of the grating structure on the surface of the upper polarizer away from the color filter layer comprises:

[0026] pointing glue on a surface of the upper polarizer away from the color filter layer to form a glue layer;

[0027] pressing the glue layer to form the grating structure.

[0028] Optionally, after the preparing of the grating structure on the surface of the color filter layer close to the upper polarizer to form a display structure; or the preparing of the grating structure on the surface of the upper polarizer away from the color filter layer to form a display structure, the method further comprises:

[0029] acquire an image brightness parameter, an image crosstalk value parameter and an image contrast parameter of the optical display device;

[0030] determine whether the grating structure is qualified according to the image brightness parameter, the image crosstalk value parameter and the image contrast parameter.

[0031] According to a third aspect of the present application, there is provided a head-up display system comprising the optical display device.

[0032] The technical solution of the present application sets the display structure and the grating structure in the optical display device, sets the grating structure on the light-emitting surface side of the color filter layer or on the side of the upper polarizer away from the color filter layer, so that the optical display device of the present application is more conducive to designing a 3D display screen with higher angular resolution compared with the prior art in which the grating is directly attached to the liquid crystal screen, and the degree of freedom of optical design is improved.

[0033] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 is a structural schematic diagram of a first optical display device according to an embodiment of the present application;

[0036] Figure 2 is a structural schematic diagram of a second optical display device according to an embodiment of the present application;

[0037] Figure 3 is a flowchart of a preparation method of the first optical display device according to an embodiment of the present application;

[0038] Figure 4 is a structural diagram corresponding to the preparation method of the first optical display device according to an embodiment of the present application;

[0039] Figure 5 is a flowchart of a preparation method of the second optical display device according to an embodiment of the present application;

[0040] Figure 6 is a structural diagram corresponding to the preparation method of the second optical display device according to an embodiment of the present application;

[0041] Figure 7 is a flow chart of a preparation method of a third optical display device according to an embodiment of the present application;

[0042] Figure 8 is a structural diagram corresponding to the preparation method of the third optical display device according to the embodiment of the present application;

[0043] Figure 9 is a flow chart of a preparation method of a fourth optical display device according to an embodiment of the present application;

[0044] Figure 10 is a structural diagram corresponding to the preparation method of the fourth optical display device according to the embodiment of the present application;

[0045] Figure 11 is a flow chart of a preparation method of a fifth optical display device according to an embodiment of the present application;

[0046] Figure 12 is a structural diagram corresponding to the preparation method of the fifth optical display device according to the embodiment of the present application;

[0047] Figure 13 is a flow chart of a preparation method of a sixth optical display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the personnel in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without making creative labor should belong to the protection scope of the present application.

[0049] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0050] Figure 1 is a structural schematic diagram of a first optical display device according to an embodiment of the present application, Figure 2 is a structural schematic diagram of a second optical display device according to an embodiment of the present application. As shown in Figure 1 and Figure 2 , the optical display device comprises:

[0051] a display structure;

[0052] The display structure comprises a color filter layer 11, an upper polarizer 4 and a grating structure 2.

[0053] The upper polarizer 4 is arranged on the light-emitting surface side of the color filter layer 11.

[0054] The color filter layer 11 is configured to filter out specific wavelength bands of light rays and emit the light rays to the upper polarizer 4; and the upper polarizer 4 is configured to filter out light rays with a polarization direction consistent with that of the upper polarizer 4 and emit the light rays from the display structure.

[0055] The grating structure 2 is arranged between the color filter layer 11 and the upper polarizer 4 or on the side of the upper polarizer 4 away from the color filter layer 11, and is configured to change the propagation direction of the light rays and divide the light rays into left-eye imaging light rays and right-eye imaging light rays with different angles.

[0056] The display structure can be prepared from a display screen. The display screen can be a device in which liquid crystal molecules display images by controlling light rays. The display screen generally comprises a backlight module, a lower polarizer, a thin film transistor, a liquid crystal layer, the color filter layer 11 and the upper polarizer 4 arranged in layers. The display structure can be prepared by peeling off the upper polarizer 4 from the display screen. Alternatively, the display structure can be prepared by gradually preparing the backlight module, the lower polarizer, the thin film transistor, the liquid crystal layer and the color filter layer 11.

[0057] The color filter layer 11 in the display structure is configured to filter out specific wavelength bands of light rays and emit the light rays from the display structure. Specifically, the color filter layer 11 can comprise a surface red-green-blue color filter film layer, which can decompose white backlight into red, green and blue pixel light, and then mix the pixel light to form a color image.

[0058] The grating structure 2 can be a cylindrical lens grating or a slit grating. The grating structure 2 is arranged on the light-emitting surface side of the color filter layer 11 or on the side of the upper polarizer 4 away from the color filter layer 11. The grating structure 2 can change the propagation direction of the light rays and generate left-eye imaging light rays and right-eye imaging light rays by using the refraction characteristics of the lens. The left-eye imaging light rays generate a left-eye parallax image, and the right-eye imaging light rays generate a right-eye parallax image. The generated left-eye parallax image and right-eye parallax image are directed to the left eye and the right eye of an audience, respectively, so that the user can see an object with a sense of depth and a sense of space, thereby forming a naked-eye 3D display.

[0059] The grating structure 2 can be prepared on the color filter layer 11 by an imprint process.

[0060] For example, first, a display screen is obtained; the upper polarizer 4 on the surface of the display screen is peeled off to form a display structure exposing the color filter layer 11; and the grating structure 2 is prepared on the light-out side of the color filter layer 11 or on the upper polarizer 4 by an imprint process to form the optical display device.

[0061] It can be understood that, in the technical scheme of the embodiment of the present application, the grating structure 2 is arranged on the color filter layer 11 of the display structure, so that, compared with the prior art in which the grating is directly attached to the liquid crystal screen, the grating structure 2 is closer to the liquid crystal layer in the display structure, which is more conducive to designing a 3D display screen with higher angular resolution and improves the degree of freedom of optical design. Alternatively, arranging the grating structure on the upper polarizer can also optimize the light angle and imaging effect and improve the imaging quality of the optical display device.

[0062] In the technical scheme of the embodiment of the present application, the grating structure is arranged on the light-out side of the color filter layer or on the side of the upper polarizer away from the color filter layer in the optical display device, which is more conducive to designing a 3D display screen with higher angular resolution and improves the degree of freedom of optical design.

[0063] Optionally, continuing to refer to Figure 1 the drawing, the optical display device further comprises an infrared cut-off filter 3;

[0064] The infrared cut-off filter 3 is arranged on the side of the upper polarizer 4 close to the color filter layer 11 and is used for filtering infrared band light entering the display structure.

[0065] The infrared cut-off filter 3 can be used for filtering infrared band light in ambient light.

[0066] Specifically, the optical display device in the embodiment of the present application can be applied in a head-up display system. In the head-up display system, key driving information needs to be projected in front of the driver's line of sight, and infrared light in the environment may interfere with the imaging quality of the optical display device. Therefore, the infrared cut-off filter 3 is arranged on the light-in side of the display structure to filter infrared band light in the environment, reduce the interference of infrared band light on the optical display device, ensure the clarity and stability of the information projected by the head-up display system, and further ensure the driving safety.

[0067] In some embodiments, the optical display device is arranged in a housing, and the infrared cut-off filter 3 can be arranged on the surface of the housing.

[0068] The technical scheme of the embodiment of the present application filters the infrared band light in ambient light by arranging the infrared cut-off filter in the optical display device, thereby reducing the interference of the infrared band light on the optical display device and ensuring the definition and stability of imaging of the optical display device.

[0069] Optionally, with reference to Figure 1 As shown, the display structure further comprises a backlight module 12, a lower polarizing plate 13, a thin film transistor 14 and a liquid crystal layer 15 which are sequentially arranged in layers; the color filter layer 11 is located on the light exit surface side of the liquid crystal layer 15.

[0070] The lower polarizing plate 13 is used to convert the natural light emitted by the backlight module 12 into polarized light.

[0071] The backlight module 12 is used to provide a light source to emit natural light. The lower polarizing plate 13 is used to convert the natural light emitted by the backlight module 12 into polarized light. The thin film transistor 14 controls the deflection angle of the liquid crystal in the liquid crystal layer 15, and the liquid crystal molecules rotate to change the direction of the polarized light under the action of the electric field.

[0072] Since the lower polarizing plate 13 is arranged in the display structure, in order to ensure the normal light emission of the optical display device, the upper polarizing plate 4 is arranged on the side of the infrared cut-off filter 3 away from the display structure, and the upper polarizing plate 4 allows the polarized light after the rotation of the liquid crystal to pass through, thereby realizing the normal display of the optical display device.

[0073] Specifically, in the preparation process, the upper polarizing plate 4 on the display screen can be peeled off to form a display structure, and the upper polarizing plate 4 is transferred to the side of the infrared cut-off filter 3 away from the display structure; then a grating structure 2 is prepared on the color filter layer 11 on the surface of the display structure by a pressing process, so as to form an optical display device. In this way, the normal light emission of the optical display device is ensured, and it is also beneficial to design a 3D display screen with higher angular resolution.

[0074] It can be understood that the optical display device in the embodiment of the present application can be applied in a head-up display system, and the head-up display system has a higher requirement for temperature resistance. However, the thermal conductivity and temperature resistance of the polarizing plate are poor. The optical display device in the embodiment of the present application arranges the upper polarizing plate 4 on the infrared cut-off filter 3, which is beneficial to improve the overall heat dissipation performance of the optical display device.

[0075] The technical scheme of the embodiment of the present application arranges the upper polarizing plate on the side of the infrared cut-off filter, ensures the cooperation of the lower polarizing plate and the upper polarizing plate in the display structure to realize normal display, and arranges the upper polarizing plate on the side of the infrared cut-off filter to improve the heat dissipation performance of the optical display device.

[0076] Based on the same inventive concept, Figure 3This is a flowchart of a method for manufacturing a first optical display device according to an embodiment of the present invention. Figure 4 This is a structural diagram corresponding to the fabrication method of the first optical display device provided in the embodiments of the present invention, combined with... Figure 3 and Figure 4 As shown, this embodiment of the invention provides a method for fabricating an optical display device; the fabrication method includes:

[0077] S10, Obtain the display screen. For example... Figure 4 As shown in step (a). The display screen includes a color filter layer 11 and an upper polarizer 4 stacked together.

[0078] The display screen can be a device that uses liquid crystal molecules to control light to achieve a display. Finished display screens can be obtained directly, and further processing and modification can be performed on them.

[0079] S11. Peel off the upper polarizer from the surface of the display screen. For example... Figure 4 As shown in step (b).

[0080] The display screen typically includes a backlight module 12, a lower polarizer 13, a thin-film transistor 14, a liquid crystal layer 15, a color filter layer 11, and an upper polarizer 4, all stacked together. The display structure can be fabricated by peeling off the upper polarizer 4. The color filter layer 11 in the display structure filters out specific wavelengths of emitted light from the display structure. Specifically, through surface red, green, and blue color filter layers, the backlight white light is decomposed into red, green, and blue pixel light, which are then mixed to form a color image.

[0081] S12. A grating structure is fabricated on the surface of the color filter layer near the upper polarizer to form a display structure; or, a grating structure is fabricated on the side of the upper polarizer away from the color filter layer to form a display structure. For example... Figure 4 As shown in step (c), Figure 4 The example of step (c) is to prepare a grating structure 2 on the surface of the color filter layer 11.

[0082] The grating structure 2 can be a cylindrical lens grating or a slit grating, etc. The grating structure 2 can be fabricated on the color filter layer 11 or the upper polarizer 4 by an imprinting process.

[0083] Exemplarily, first, a display screen is acquired; the upper polarizer 4 on the surface of the display screen is peeled off to form a display structure exposing a color filter layer 11; a grating structure 2 is prepared on the light-out surface side of the color filter layer 11 through a stamping process to form an optical display device. Alternatively, the grating structure 2 is prepared on the side of the upper polarizer 4 away from the color filter layer 11, and the grating structure 2 at this position can also optimize the angle of light, thereby optimizing the imaging effect and improving the imaging quality of the optical display device.

[0084] The technical scheme of the embodiment of the present application peels off the upper polarizer on the display screen and prepares the grating structure on the light-out surface side of the color filter layer, so that the optical display device of the embodiment of the present application is compared with the grating directly attached to the liquid crystal screen in the prior art, the process is more simplified, without the need of preparing the grating on the grating substrate and then attaching it to the liquid crystal screen, the grating structure is closer to the liquid crystal layer in the display structure, which is more conducive to designing a 3D display screen with higher angular resolution and improves the degree of freedom of optical design. Alternatively, the grating structure is prepared on the side of the upper polarizer away from the color filter layer, which also optimizes the angle of light, thereby optimizing the imaging effect and improving the imaging quality of the optical display device.

[0085] On the basis of the above embodiment, Figure 5 is a flow chart of a second preparation method of an optical display device according to the embodiment of the present application, Figure 6 is a structure diagram corresponding to the second preparation method of the optical display device according to the embodiment of the present application, which is combined with Figure 5 and Figure 6 as shown, the preparation method comprises:

[0086] S20, acquiring a display screen. As shown in step (d) of Figure 6 .

[0087] S21, peeling off the upper polarizer on the surface of the display screen. As shown in step (e) of Figure 6 .

[0088] S22, dispensing glue on the surface of the color filter layer close to the upper polarizer to form a glue layer. As shown in step (f) of Figure 6 .

[0089] Wherein, since the material of the grating can be a glue material, dispensing glue on the light-out surface side of the color filter layer 11 forms a glue layer 90 with fluidity.

[0090] S23, stamping the glue layer to form a grating structure. As shown in step (g) of Figure 6 .

[0091] The mold corresponding to the parameters is used to emboss the adhesive layer 90, and the mold is cut off to form the grating structure 2 with the corresponding shape parameters. This process does not require a grating substrate, and is directly prepared based on the color filter layer 11 without the need for the adhesive layer 90 to be attached. Since the grating structure 2 is made of the adhesive layer 90, it has a gluing effect.

[0092] It can be understood that the photolithography process is not selected to prepare the grating structure 2 in the embodiment of the application because it is difficult to make the grating structure 2 by photolithography, and the photoresist has high requirements. In addition, the grating structure 2 is usually made at high temperature, which affects the display performance. The embossing process is used to make the grating structure 2 in the embodiment of the application, which has no requirements for the substrate and does not require high temperature, and has high efficiency.

[0093] The technical scheme of the embodiment of the application uses the embossing process to prepare the grating structure, so that the grating structure can be directly prepared based on the color filter layer, thereby ensuring the efficiency of the preparation of the optical display device.

[0094] On the basis of the above-mentioned embodiment, Figure 7 is a third preparation method flow chart of an optical display device according to an embodiment of the application, Figure 8 is a structure diagram corresponding to the third preparation method of the optical display device according to the embodiment of the application, which is combined with Figure 7 and Figure 8 It is shown that the preparation method comprises:

[0095] S30, obtaining a display screen. As shown in step (h) of Figure 8 .

[0096] S31, setting an infrared cut-off filter along the light-emitting direction of the display screen. As shown in step (i) of Figure 8 .

[0097] The optical display device can be arranged in a housing, and the infrared cut-off filter 3 can be arranged on the surface of the housing. The infrared cut-off filter 3 can filter the infrared band light in the environment, reduce the interference of the infrared band light on the optical display device, ensure the clarity and stability of the projection information of the head-up display system, and further ensure the driving safety.

[0098] S32, peeling off the upper polarizer on the surface of the display screen. As shown in step (j) of Figure 8 .

[0099] S33, preparing a grating structure on the surface of the color filter layer close to the upper polarizer to form a display structure; or preparing a grating structure on the surface of the upper polarizer away from the color filter layer to form a display structure. As shown in step (k) of Figure 8 , Figure 8 The example shown in step (k) of is to prepare a grating structure 2 on the surface of the color filter layer 11.

[0100] The technical scheme of the embodiment of the present application filters the infrared band light in the ambient light through the infrared cut-off filter arranged along the light-out direction of the display screen, thereby reducing the interference of the infrared band light on the optical display device and ensuring the definition and stability of the imaging of the optical display device.

[0101] On the basis of the above-described embodiment, Figure 9 is a fourth preparation method flowchart of an optical display device according to the embodiment of the present application, Figure 10 is a structure diagram corresponding to the fourth preparation method of the optical display device according to the embodiment of the present application, which is combined with Figure 9 and Figure 10 as shown, and the preparation method comprises the following steps.

[0102] S40, obtaining a display screen. As shown in step (l) of Figure 10 .

[0103] S41, arranging an infrared cut-off filter along the light-out direction of the display screen. As shown in step (m) of Figure 10 .

[0104] S42, peeling off the upper polarizer on the surface of the display screen. As shown in step (n) of Figure 10 .

[0105] S43, arranging the upper polarizer on the side of the infrared cut-off filter away from the color filter layer. As shown in step (o) of Figure 10 , wherein the upper polarizer 4 can be attached to the side of the infrared cut-off filter 3 away from the display structure by using an attaching device.

[0106] S44, preparing a grating structure on the surface of the color filter layer close to the upper polarizer to form a display structure; or preparing a grating structure on the side of the upper polarizer away from the color filter layer to form a display structure. As shown in step (p) of Figure 10 , Figure 10 , the example shown in step (p) is to prepare a grating structure 2 on the surface of the color filter layer 11.

[0107] Wherein, the display screen generally comprises a backlight module 12, a lower polarizer 13, a thin film transistor 14, a liquid crystal layer 15, a color filter layer 11 and an upper polarizer 4 arranged in layers, the upper polarizer 4 is peeled off in the present embodiment for preparing an optical display device, a grating structure 2 is prepared on the color filter layer 11, the upper polarizer 4 is transferred to the side of the infrared cut-off filter 3 away from the display structure in order to realize normal imaging, thereby ensuring the cooperation of the lower polarizer 13 and the upper polarizer 4 in the display structure to realize normal display and improving the heat dissipation performance of the optical display device.

[0108] On the basis of the above-described embodiment,Figure 11 This is a flowchart of a fifth optical display device manufacturing method according to an embodiment of the present invention. Figure 12 This is a structural diagram corresponding to the fifth optical display device fabrication method provided in the embodiments of the present invention, combined with... Figure 11 and Figure 12 As shown, the preparation method includes:

[0109] S50, Obtain the display screen. For example... Figure 12 The (q) step is shown.

[0110] S51. Peel off the upper polarizer from the surface of the display screen. For example... Figure 12 The (r) step is shown.

[0111] S52. Apply adhesive to the surface of the upper polarizer on the side away from the color filter layer to form an adhesive layer. For example... Figure 12 The (s) step is shown.

[0112] S53. Imprint the adhesive layer to form a grating structure. For example... Figure 12 The (t) step is shown.

[0113] The grating structure 2 set on the upper polarizer 4 can also be prepared by imprinting the adhesive layer 90.

[0114] Specifically, the grating structure 2 set on the upper polarizer 4 can also change the direction of light propagation by utilizing the refraction characteristics of the lens. By setting the grating structure 2 on the side of the upper polarizer 4 away from the infrared cut-off filter 3, the grating structure 2 can optimize the angle of light, thereby optimizing the imaging effect and improving the imaging quality of the optical display device.

[0115] Based on the above embodiments, Figure 13 This is a flowchart of a method for manufacturing a sixth type of optical display device according to an embodiment of the present invention, combined with... Figure 1 and Figure 13 As shown, the preparation method includes:

[0116] S60, Get the display screen.

[0117] S61. Peel off the upper polarizer from the surface of the display screen.

[0118] S62. A grating structure is prepared on the surface of the color filter layer near the upper polarizer to form a display structure; or, a grating structure is prepared on the side of the upper polarizer away from the color filter layer to form a display structure.

[0119] S63. Obtain the image brightness parameters, image crosstalk value parameters, and image contrast parameters of the optical display device.

[0120] The optical display device can be arranged in a head-up display system and used to obtain image brightness parameters, image crosstalk value parameters and image contrast parameters of an imaging image in a simulated front windshield test on a test bench.

[0121] S64, judging whether the grating structure is qualified according to the image brightness parameters, the image crosstalk value parameters and the image contrast parameters.

[0122] For example, when the image brightness parameters are greater than 12000 nits, the image crosstalk value parameters are less than 2%, and the image contrast parameters are greater than 1000, it is judged that the preparation of the grating structure 2 is qualified.

[0123] Compared with the process flow in the prior art, the technical scheme of the embodiment of the present application saves the investment in the fitting device, does not need to use the grating substrate, simplifies the process flow, and saves the cost of material and human management.

[0124] Based on the same inventive concept, the embodiment of the present application provides a head-up display system, which comprises the optical display device.

[0125] The head-up display system provided by the embodiment of the present application comprises any one of the optical display devices provided by the above embodiments, and thus has the same technical effects, which will not be described herein again.

[0126] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical scheme of the present application can be achieved, which is not limited herein.

[0127] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An optical display device, characterized in that, include: Display structure; The display structure includes a color filter layer, an upper polarizer, and a grating structure; The upper polarizer is disposed on one side of the light-emitting surface of the color filter layer; The color filter layer is used to select outgoing light of a specific wavelength band to be emitted onto the upper polarizer; the upper polarizer is used to select outgoing light of the outgoing light that has the same polarization direction as the upper polarizer and emit it from the display structure. The grating structure is disposed between the color filter layer and the upper polarizer or on the side of the upper polarizer away from the color filter layer, for changing the propagation direction of the emitted light and splitting it into left-eye imaging light and right-eye imaging light at different angles.

2. The optical display device according to claim 1, characterized in that, It also includes infrared cut-off filters; The infrared cut-off filter is disposed on the side of the upper polarizer near the color filter layer, and is used to filter infrared light entering the display structure.

3. The optical display device according to claim 1, characterized in that, The display structure also includes a backlight module, a lower polarizer, a thin-film transistor, and a liquid crystal layer stacked sequentially; the color filter layer is located on the light-emitting side of the liquid crystal layer. The lower polarizer is used to convert the natural light emitted from the backlight module into polarized light.

4. A method for manufacturing an optical display device, characterized in that, The method for preparing the optical display device according to any one of claims 1-3 includes: Obtain a display screen; wherein the display screen includes a layer of color filter and an upper polarizer stacked together; Peel off the upper polarizer from the surface of the display screen; A grating structure is formed on the surface of the color filter layer near the upper polarizer to form a display structure; or, a grating structure is formed on the side of the upper polarizer away from the color filter layer to form a display structure.

5. The preparation method according to claim 4, characterized in that, A grating structure is fabricated on the surface of the color filter layer near the upper polarizer, including: A glue layer is formed by applying adhesive to the surface of the color filter layer near the upper polarizer. The adhesive layer is imprinted to form a grating structure.

6. The preparation method according to claim 4, characterized in that, After acquiring the display screen, it also includes: An infrared cutoff filter is provided along the light emission direction of the display screen.

7. The preparation method according to claim 6, characterized in that, After peeling off the upper polarizer from the surface of the display screen, the process further includes: The upper polarizer is positioned on the side of the infrared cut-off filter away from the color filter layer.

8. The preparation method according to claim 4, characterized in that, A grating structure is fabricated on the side of the upper polarizer away from the color filter layer, including: A glue layer is formed by applying adhesive to the surface of the upper polarizer on the side away from the color filter layer. The adhesive layer is imprinted to form a grating structure.

9. The preparation method according to claim 4, characterized in that, A grating structure is formed on the surface of the color filter layer near the upper polarizer to form a display structure; or, after forming a grating structure on the side of the upper polarizer away from the color filter layer to form a display structure, the method further includes: Acquire the image brightness parameters, image crosstalk value parameters, and image contrast parameters of the optical display device; The grating structure is deemed qualified based on the image brightness parameter, the image crosstalk value parameter, and the image contrast parameter.

10. A head-up display system, characterized in that, The optical display device includes any one of claims 1-3.

Images