Display screen, head-up display and vehicle

Abstract

The application discloses a display screen, a head-up display and a vehicle, and belongs to the technical field of display. The display screen is applied to the head-up display, and the display screen comprises a liquid crystal piece, a first polarization layer, a second polarization layer and at least one heat dissipation layer. The liquid crystal piece comprises a liquid crystal layer, a filter, a first glass substrate and a second glass substrate. The liquid crystal layer is encapsulated between the first glass substrate and the second glass substrate. The filter is located on any side of the first glass substrate or any side of the second glass substrate. The first polarization layer is located on a side of the liquid crystal piece close to an optical assembly of the head-up display. The second polarization layer is located on a side of the liquid crystal piece away from the optical assembly. The at least one heat dissipation layer is located on any side of the first polarization layer, any side of the second polarization layer, any side of the first glass substrate or any side of the second glass substrate. The display screen adopting the embodiment of the application has high heat dissipation efficiency and long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display screen, a head-up display and a vehicle. BACKGROUND

[0002] With the rapid development of technology and the demand of users for the functionality and comfort of vehicles, more and more vehicles are equipped with head-up displays. The head-up display is a device that uses the principle of light reflection to reflect the information on the instrument to the windshield for the driver to view. Through this way of displaying information, the driver can more intuitively understand the running state of the vehicle on the front windshield. In this way, the driver can avoid the action of looking down to check the information, and reduce the situation of traffic accidents caused by blind driving.

[0003] Generally, the display screen is located between the light outlet of the head-up display and the backlight illumination module. The sunlight from the outside can enter the interior of the head-up display from the light outlet, and the light emitted by the backlight illumination module passes through the display screen and the optical assembly in the head-up display in turn, and is emitted to the front windshield through the light outlet, so that the information can be displayed on the front windshield. As can be seen from the above, the display screen not only receives the heat generated by the sunlight backflow, but also receives the heat generated by the backlight illumination module, and there is a technical problem that the heat load of the display screen is too heavy and the display screen is easily damaged. There is no technical solution to solve the above technical problem. SUMMARY

[0004] Therefore, the present application provides a display screen, a head-up display and a vehicle, which can improve the heat dissipation efficiency of the display screen, reduce the heat load of the display screen, and prolong the service life of the display screen.

[0005] In one aspect, the present application provides a display screen, which is applied to a head-up display, and the display screen comprises a liquid crystal piece, a first polarization layer, a second polarization layer and at least one heat dissipation layer.

[0006] The liquid crystal piece comprises a liquid crystal layer, a filter, a first glass substrate and a second glass substrate, the liquid crystal layer is encapsulated between the first glass substrate and the second glass substrate, and the filter is located on any one side of the first glass substrate or any one side of the second glass substrate.

[0007] The first polarization layer is located on the side of the liquid crystal piece close to the optical assembly of the head-up display, and the second polarization layer is located on the side of the liquid crystal piece away from the optical assembly.

[0008] The at least one heat dissipation layer is located on any one side of the first polarization layer, any one side of the second polarization layer, any one side of the first glass substrate or any one side of the second glass substrate.

[0009] Optionally, the at least one heat dissipation layer comprises a first sub-heat dissipation layer.

[0010] The first sub-heat dissipation layer is attached to a side of the liquid crystal element that is close to the optical assembly.

[0011] Optionally, the at least one heat dissipation layer comprises a second sub-heat dissipation layer.

[0012] The second sub-heat dissipation layer is attached to a side of the liquid crystal element that is away from the optical assembly.

[0013] Optionally, the at least one heat dissipation layer further comprises a third sub-heat dissipation layer, which is attached to a side of the first polarizing layer that is close to the optical assembly.

[0014] Optionally, the at least one heat dissipation layer further comprises a fourth sub-heat dissipation layer, which is attached to a side of the second polarizing layer that is away from the optical assembly.

[0015] Optionally, the at least one heat dissipation layer is in a solid structure.

[0016] Optionally, the at least one heat dissipation layer is in a structure provided with a hollow region, wherein the hollow region is filled with a heat-conducting liquid.

[0017] Optionally, the first sub-heat dissipation layer is integrally formed with the first glass substrate.

[0018] Optionally, the second sub-heat dissipation layer is integrally formed with the second glass substrate.

[0019] In another aspect, the embodiments of the present application provide a head-up display, which comprises any of the display screens described above.

[0020] In another aspect, the embodiments of the present application provide a vehicle, which comprises the head-up display described above.

[0021] The display screen provided in an embodiment of the present application is used in a head-up display (HUD). The display screen includes a liquid crystal element, a first polarizing layer, a second polarizing layer, and at least one heat dissipation layer. The liquid crystal element includes a liquid crystal layer, a filter, a first glass substrate, and a second glass substrate. The liquid crystal layer is encapsulated between the first and second glass substrates, and the filter is located on either side of the first glass substrate or the second glass substrate. The first polarizing layer is located on the side of the liquid crystal element closest to the HUD's optical components, and the second polarizing layer is located on the side of the liquid crystal element facing away from the optical components. Because the at least one heat dissipation layer of the display screen is located on either side of the first polarizing layer, the second polarizing layer, the first glass substrate, or the second glass substrate, the thickness of the display screen is increased, thereby increasing the sidewall area of ​​the display screen. This increases the contact area between the display screen and the gas and housing within the HUD, improving the heat dissipation efficiency of the display screen. This prevents heat concentration on the display screen, leading to excessive heat load, and extends the service life of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0025] Figure 3 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0027] Figure 5 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0028] Figure 6 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0029] Figure 7 This is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0030] Figure 8 This is a structural diagram of a head-up display provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 100. Liquid crystal components;

[0033] 110. Liquid crystal layer;

[0034] 120, filter;

[0035] 130. A first glass substrate;

[0036] 140. A second glass substrate;

[0037] 200, first polarization layer;

[0038] 300, second polarization layer;

[0039] 410. First sub-heat dissipation layer;

[0040] 420, second sub-heat dissipation layer;

[0041] 430, third sub-heat dissipation layer;

[0042] 440, fourth sub-heat dissipation layer;

[0043] 500, head-up display;

[0044] 510, optical components;

[0045] 511. Plane mirror;

[0046] 512, curved mirror;

[0047] 520. Light outlet;

[0048] 530. Backlighting module.

[0049] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0052] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0053] Combine Figure 1 and Figure 8 As shown, an embodiment of the present application provides a display screen, which is applied to a head-up display 500. The display screen includes a liquid crystal element 100, a first polarizing layer 200, a second polarizing layer 300, and at least one heat dissipation layer. The liquid crystal element 100 includes a liquid crystal layer 110, a filter 120, a first glass substrate 130, and a second glass substrate 140. The liquid crystal layer 110 is encapsulated between the first glass substrate 130 and the second glass substrate 140. The filter 120 is located on either side of the first glass substrate 130 or either side of the second glass substrate 140. Figure 1 The figure shows the case where the filter 120 is located on the side of the first glass substrate 130 close to the liquid crystal layer 110. The filter 120 can also be located on the side of the first glass substrate 130 away from the liquid crystal layer 110 (not shown in the figure), and the filter 120 can also be located on either side of the second glass substrate 140 (not shown in the figure). The first polarizing layer 200 is located on the side of the liquid crystal element 100 close to the optical component 510 of the head-up display 500, and the second polarizing layer 300 is located on the side of the liquid crystal element 100 away from the optical component 510. The at least one heat dissipation layer is located on either side of the first polarizing layer 200, either side of the second polarizing layer 300, either side of the first glass substrate 130 or either side of the second glass substrate 140. It should be noted that the material of the heat dissipation layer is a material with high light transmittance and high thermal conductivity, for example, it can be a glass material. It should be noted that, Figure 8 The optical assembly 510 shown includes a plane mirror 511 on the left and a curved mirror 512 on the right. This is only an example of an optical assembly 510. The optical assembly 510 may also include other optical lenses such as plane mirrors, convex lenses, curved mirrors, etc., which are not listed here one by one. The embodiment of the present application is based on Figure 8 The optical assembly 510 is shown as an example for illustration.

[0054] It should be noted that the sidewalls of the liquid crystal layer 110, the color filter 120, the first glass substrate 130, and the second glass substrate 140 can be encapsulated together using a colloid to form the liquid crystal element 100. The color filter 120 can be a color filter. The display screen provided in the embodiment of the present application can be a TFT-LCD (Thin Film Transistor Liquid Crystal Display). When current passes through the crystal layer, the electric field changes, causing the liquid crystal molecules to deflect, thereby changing the polarization of the light. The first polarization layer 200 and the second polarization layer 300 then determine the brightness of the pixel. In addition, because the first glass substrate 130 or the second glass substrate 140 is bonded to the color filter, each pixel formed contains red, blue, and green. These pixels emitting red, blue, and green colors constitute the video image on the display panel. Due to its advantages such as high resolution, rich colors, fast screen response, high contrast, and high brightness, TFT-LCD screens can be used in vehicle head-up displays 500.

[0055] The display screen provided in the embodiment of the present application includes a liquid crystal element 100, a first polarizing layer 200, a second polarizing layer 300, and at least one heat dissipation layer. Because the at least one heat dissipation layer of the display screen is located on any side of the first polarizing layer 200, any side of the second polarizing layer 300, any side of the first glass substrate 130, or any side of the second glass substrate 140, the thickness of the display screen is increased, that is, the sidewall area of ​​the display screen is increased. This increases the contact area between the display screen and the gas inside the head-up display and the housing for heat conduction, thereby improving the heat dissipation efficiency of the display screen. Furthermore, a thicker display screen can more quickly absorb heat from the light spot formed by focused sunlight on the display screen, avoiding the situation where heat concentration on the display screen causes excessive heat load, thereby extending the service life of the display screen.

[0056] The following is combined with Figures 1 to 8 The details and functions of the display screen provided in the embodiments of the present application are described in more detail.

[0057] Combine Figure 2 and Figure 8 As shown, in some embodiments, the at least one heat dissipation layer includes a first heat dissipation sub-layer 410. A surface of the first heat dissipation sub-layer 410 facing away from the optical component 510 is in contact with a surface of the liquid crystal element 100 that is close to the optical component 510. In some embodiments, a surface of the first heat dissipation sub-layer 410 that is close to the optical component 510 is in contact with or spaced apart from a surface of the first polarizing layer 200 that is facing away from the optical component 510. Figure 2The first polarization layer 200 is attached to the first sub-heat dissipation layer 410 away from the optical assembly 510, and the first sub-heat dissipation layer 410 is attached to the liquid crystal element 100 away from the optical assembly 510. In this case, the first polarization layer 200, the first sub-heat dissipation layer 410, and the liquid crystal element 100 are encapsulated together and mounted on a fixing member inside the head-up display 500. Figure 8 The first sub-heat dissipation layer 410 is attached to the liquid crystal element 100 away from the optical assembly 510, and the first sub-heat dissipation layer 410 is attached to the first polarization layer 200 away from the optical assembly 510. In this case, the first sub-heat dissipation layer 410 and the first glass substrate 130 of the liquid crystal element 100 are encapsulated together, and the first polarization layer 200 can be mounted on a fixing member inside the head-up display 500. It should be noted that the fixing member can be a light shield inside the head-up display 500 or a display screen housing for accommodating the display screen.

[0058] It should be noted that since the first sub-heat dissipation layer 410 is arranged between the first polarization layer 200 and the liquid crystal element 100, the thickness of the display screen is relatively thick. The side wall area of the display screen includes not only the side wall area of the liquid crystal element 100 but also the side wall area of the first sub-heat dissipation layer 410, that is, the first sub-heat dissipation layer 410 increases the side wall area of the display screen. Thus, the contact area between the display screen and the gas inside the head-up display 500 or the housing structure in contact with the side wall of the display screen is increased, the heat conduction efficiency is improved, that is, the heat dissipation efficiency of the display screen is improved, the temperature of the display screen can be rapidly reduced, and the phenomenon that the temperature of the display screen is too high to damage the liquid crystal layer 110 is avoided, thereby prolonging the service life of the display screen.

[0059] It should also be noted that parallel light rays entering the head-up display 500 from the light outlet 520 are reflected and converged by the optical assembly 510 of the head-up display 500, forming a focal point near the liquid crystal element 100. It is understood that the position of the focal point will vary depending on the angle of incidence of the light rays. The focal point referred to herein refers to a focal point with a predetermined angle of incidence or a focal range with a predetermined angle range of incidence. The predetermined angle or predetermined angle range can be selected based on design requirements or test results. Because the first sub-heat dissipation layer 410 is disposed between the first polarizing layer 200 and the liquid crystal element 100, the first polarizing layer 200 is relatively far from the surface of the liquid crystal element 100, i.e., the first polarizing layer 200 is located away from the focal point. If sunlight from outside the head-up display 500 enters through the light outlet 520 of the head-up display 500 and strikes the first polarizing layer 200, the light creates a larger spot on the first polarizing layer 200 because the first polarizing layer 200 is located away from the focal point. Heat is not excessively concentrated on the first polarizing layer 200, thus reducing the maximum temperature rise in the spot area of ​​the first polarizing layer 200. Furthermore, because the first heat sink sub-layer 410 is located between the first polarizing layer 200 and the surface of the liquid crystal element 100, heat from the first polarizing layer 200 is first transferred to the first heat sink sub-layer 410 rather than directly to the liquid crystal element 100. Consequently, the temperature of the liquid crystal element 100 is prevented from rapidly increasing due to the heat from the first polarizing layer 200, preventing damage to the liquid crystal element 100 caused by overheating due to sunlight backflow. This further extends the service life of the liquid crystal element 100 and the display screen.

[0060] like Figure 1 As shown, in some embodiments, at least one heat dissipation layer further includes a second sub-heat dissipation layer 420. The side of the second heat dissipation layer 420 proximal to the optical assembly 510 is in contact with the side of the liquid crystal element 100 facing away from the optical assembly 510. In some embodiments, the side of the second heat dissipation layer 420 facing away from the optical assembly 510 is in contact with or spaced apart from the side of the second polarizing layer 300 proximal to the optical assembly 510. Generally, the sum of the thickness of the first heat dissipation layer 410 and the thickness of the first glass substrate 130 is greater than 1.1 mm. The sum of the thickness of the second heat dissipation layer 420 and the thickness of the second glass substrate 140 is greater than 1.1 mm. Figure 1 This is an example in which the side of the second heat dissipation sub-layer 420 that is closer to the optical assembly 510 is in contact with the side of the liquid crystal element 100 that is away from the optical assembly 510, and the side of the second heat dissipation sub-layer 420 that is away from the optical assembly 510 is in contact with the side of the second polarizing layer 300 that is closer to the optical assembly 510. In this case, the second polarizing layer 300, the second heat dissipation sub-layer 420, and the liquid crystal element 100 are packaged together and mounted on a fixed component within the head-up display 500. Figure 8The second sub-cooling layer 420 is attached to the side of the liquid crystal element 100 away from the optical assembly 510, and the side of the second sub-cooling layer 420 away from the optical assembly 510 has a distance from the side of the second polarizing layer 300 close to the optical assembly 510. At this time, the second sub-cooling layer 420 is encapsulated with the second glass substrate 140 of the liquid crystal element 100, and the second polarizing layer 300 can be mounted on the fixing member inside the head-up display 500.

[0061] It should be noted that the cooling principle of the second sub-cooling layer 420 is the same as that of the first sub-cooling layer 410. Since the second sub-cooling layer 420 is arranged between the second polarizing layer 300 and the liquid crystal element 100 and is made of glass, the side wall area of the display screen is increased, thereby increasing the contact area between the display screen and the gas inside the head-up display 500 or the shell structure in contact with the side wall of the display screen, improving the cooling efficiency of the display screen, and avoiding the phenomenon that the temperature of the display screen is too concentrated to be damaged. Prolong the service life of the display screen.

[0062] Referring to Figure 6 or Figure 7 In some embodiments, the first polarizing layer 200 is attached to the side of the first sub-cooling layer 410 away from the liquid crystal element 100, and the side of the first sub-cooling layer 410 close to the liquid crystal element 100 has a distance from the liquid crystal element 100, wherein the first polarizing layer 200 and the first sub-cooling layer 410 are encapsulated and mounted on the fixing member inside the head-up display 500.

[0063] Referring to Figure 6 or Figure 7 In some embodiments, the second polarizing layer 300 is attached to the side of the second sub-cooling layer 420 away from the liquid crystal element 100, and the side of the second sub-cooling layer 420 close to the liquid crystal element 100 has a distance from the liquid crystal element 100, wherein the second polarizing layer 300 and the second sub-cooling layer 420 are encapsulated and mounted on the fixing member inside the head-up display 500.

[0064] It should be noted that the display screen shell of the display screen generally wraps the side wall of the display screen. If the fixing member is the shell of the display screen, such as Figure 7As shown, there is a distance between the first sub-heat sink layer 410 and the liquid crystal element 100, and there is a distance between the second sub-heat sink layer 420 and the liquid crystal element 100. Then, the encapsulated first sub-heat sink layer 410 and the first polarizing layer 200 are installed in a first clip structure at a first depth within the display housing, the liquid crystal element 100 is installed in a second clip structure at a second depth within the display housing, and the encapsulated second sub-heat sink layer 420 and the second polarizing layer 300 are installed in a third clip structure at a third depth within the display housing. The distances between the first depth, the second depth, and the third depth and the second polarizing layer 300 decrease in sequence. Generally, a backlight module 530 can also be installed within the display housing, with the backlight module 530 located on the side of the second polarizing layer 300 facing away from the liquid crystal element 100. In other embodiments of the present application, where there is a distance between the layers, the installation method of the layers follows the same principle as the above installation method and is not further described here.

[0065] like Figure 3 As shown, in some embodiments, at least one heat dissipation layer further includes a third sub-heat dissipation layer 430, which is attached to a surface of the first polarizing layer 200 proximal to the optical assembly 510. It will be appreciated that when sunlight enters the head-up display 500 through the light outlet 520, the sunlight first passes through the third sub-heat dissipation layer 430 before reaching the first polarizing layer 200. Because the third sub-heat dissipation layer 430 absorbs and disperses the heat received by the first polarizing layer 200 and conducts it, the temperature rise of the first polarizing layer 200 is reduced, thereby preventing damage to the first polarizing layer 200 due to excessive temperature and extending the service life of the first polarizing layer 200. Furthermore, the third sub-heat dissipation layer 430 further increases the sidewall area of ​​the display screen, thereby increasing the contact area between the sidewall of the display screen and the surrounding air and / or the housing structure, improving the heat dissipation efficiency of the display screen and preventing excessive heat concentration on the display screen.

[0066] like Figure 4 As shown, in some embodiments, the display screen further includes a fourth sub-heat dissipation layer 430, which is in contact with a surface of the second polarizing layer 300 facing away from the optical assembly 510. It should be noted that the surface of the second polarizing layer 300 facing away from the optical assembly 510 is the surface proximate to the backlight module 530 of the head-up display 500. The display screen provided in the embodiments of the present application may include any one, two, or more of the first sub-heat dissipation layer 410, the second sub-heat dissipation layer 420, the third sub-heat dissipation layer 430, and the fourth sub-heat dissipation layer 440.

[0067] It should be noted that the display screen itself only controls the transmittance of light and does not have its own luminous function. Therefore, the head-up display 500 typically includes a backlight module 530 (also known as a backlight panel) to provide a high-brightness light source with uniform brightness distribution to the display screen. The display screen controls the rotation of the liquid crystals using voltage, thereby controlling the brightness of the light to create different grayscales. The light source provided by the backlight module 530 passes through the second polarizing layer 300 and reaches the liquid crystal element 100. It is ultimately emitted from the light outlet 520 of the head-up display 500 to form an image on the front windshield, providing the user with auxiliary information during vehicle driving. It is understood that the heat load of the liquid crystal element 100 comes not only from the heat carried by the sunlight entering from outside the head-up display 500, but also from the heat generated by the light source of the backlight module 530. In this embodiment of the present application, by providing a fourth sub-heat dissipation layer 430 between the second polarizing layer 300 and the backlight module 530, the light source of the backlight module 530 passes through the fourth sub-heat dissipation layer 430 first. Since part of the heat has been absorbed and conducted by the fourth sub-heat dissipation layer 430, the temperature rise of the second polarization layer 300 is relatively low, which means that the temperature of the second polarization layer 300 is reduced, thereby preventing the second polarization layer 300 from being damaged due to excessive temperature. At the same time, the heat conducted from the second polarization layer 300 to the liquid crystal element 100 is also reduced, thereby further preventing the liquid crystal element 100 from being overheated and extending the service life of the liquid crystal element 100.

[0068] In some embodiments, at least one heat dissipation layer is a solid structure. For example, any heat dissipation layer can be made of solid glass. In some embodiments, the first heat dissipation sub-layer 410 and the first glass substrate 130 are integrally formed. In some embodiments, the second heat dissipation sub-layer 420 and the second glass substrate 140 are integrally formed. It should be noted that the material of the first heat dissipation sub-layer 410 can be the same as that of the first glass substrate 130, and the material of the second heat dissipation sub-layer 420 can be the same as that of the second glass substrate 140. This facilitates processing and improves production efficiency.

[0069] like Figure 5As shown, in some embodiments, at least one heat dissipation layer is a structure having a hollow area, wherein the hollow area is filled with a heat-conducting liquid. For example, any heat dissipation layer is made of glass with a hollow area. The heat-conducting liquid can be a thermally conductive silicone oil having a higher thermal conductivity than the first glass substrate 130 and the second glass substrate 140. It is understood that by filling the interior of the heat dissipation layer with heat-conducting liquid, when the temperature of the heat dissipation layer increases, the higher temperature portion of the heat-conducting liquid floats upward, while the lower temperature portion of the liquid fills the space occupied by the high temperature liquid before floating, thereby circulating to form convection, thereby improving the heat dissipation efficiency of the heat dissipation layer. In this way, the heat between the liquid crystal element 100, the first polarizing layer 200 and the heat dissipation layer can be quickly dissipated, avoiding the phenomenon of damage to the display screen due to excessive temperature concentration, thereby extending the service life of the display screen.

[0070] Continue to see Figure 6 In some embodiments, both the first glass substrate 130 and the second glass substrate 140 are made of glass with hollow regions, wherein each hollow region is filled with a heat transfer fluid. This can further increase the heat transfer efficiency of the first glass substrate 130 and the second glass substrate 140.

[0071] like Figure 7 As shown, in some embodiments, the first polarizing layer 200 and the first heat sink sub-layer 410 are in contact with each other on a side facing away from the liquid crystal element 100, and the first polarizing layer 200 and the first heat sink sub-layer 410 are not parallel to the liquid crystal element 100. It should be noted that the head-up display 500 is a visual imaging system, and its display effect relies primarily on subjective human perception. Because the first polarizing layer 200 and the first heat sink sub-layer 410 are not parallel to the liquid crystal element 100, stray light is reduced. This prevents external light or light within the head-up display 500 from reflecting through non-imaging paths onto the display location on the front windshield, thereby affecting the user's normal viewing of the image. This improves the imaging and display quality of the head-up display 500. Furthermore, when light strikes the first polarizing layer 200, the light spot formed there is larger because it is far from the focal point. This prevents excessive heat concentration on the first polarizing layer 200, reduces the maximum temperature rise of the light spot on the first polarizing layer 200, and prevents damage to the first polarizing layer 200 due to high temperatures. Furthermore, since the first polarizing layer 200 blocks a portion of the sunlight, the heat carried by the light irradiating the display screen can be reduced, thereby preventing the display screen from being damaged due to excessive heat concentration.

[0072] In some embodiments, the first polarizing layer 200 is an absorbing polarizing layer and the second polarizing layer 300 is a reflective polarizing layer; alternatively, both the first polarizing layer 200 and the second polarizing layer 300 are reflective polarizing layers.

[0073] It should be noted that since the first polarizing layer 200 is an absorption type polarizing layer or a reflection type polarizing layer, the stray light generated inside the head-up display 500 can be reduced, thereby improving the imaging effect and display effect of the head-up display 500. At the same time, since the second polarizing layer 300 is a reflection type polarizing layer, the second polarizing layer 300 can reflect part of the light provided by the backlight illumination module 530 back to the backlight illumination module 530, thereby improving the light source utilization rate of the backlight illumination module 530. It should be noted that the above embodiments can be combined with each other.

[0074] The display screen provided by the embodiment of the present application comprises a liquid crystal piece 100, a first polarizing layer 200, a second polarizing layer 300, and at least one heat dissipation layer. Since the at least one heat dissipation layer of the display screen is located on any one side of the first polarizing layer 200, any one side of the second polarizing layer 300, any one side of the first glass substrate 130, or any one side of the second glass substrate 140, the thickness of the display screen is increased, that is, the side wall area of the display screen is increased. Therefore, the contact area of the display screen with the gas and the shell inside the head-up display for heat conduction is increased, and the heat dissipation efficiency of the display screen is improved. At the same time, the thicker display screen can absorb the heat on the light spot formed by the focusing of sunlight on the display screen faster, avoiding the situation that the heat load is too heavy due to the concentration of heat on the display screen, thereby prolonging the service life of the display screen. Moreover, any one of the first glass substrate 130, the second glass substrate 140, the first sub-heat dissipation layer 410, the second sub-heat dissipation layer 420, the third sub-heat dissipation layer 430, and the fourth sub-heat dissipation layer 430 can be made of glass material with a hollow area and filled with heat-conducting liquid in the corresponding hollow area, thereby further improving the heat dissipation efficiency of the liquid crystal screen, avoiding damage to the liquid crystal screen due to heat concentration, that is, prolonging the service life of the display screen.

[0075] The embodiment of the present application provides a head-up display 500, which comprises the display screen of any one of the above.

[0076] The display screen installed on the head-up display 500 provided by the embodiment of the present application comprises a liquid crystal piece 100, a first polarizing layer 200, a second polarizing layer 300, and at least one heat dissipation layer. Since the at least one heat dissipation layer of the display screen is located on any one side of the first polarizing layer 200, any one side of the second polarizing layer 300, any one side of the first glass substrate 130, or any one side of the second glass substrate 140, the thickness of the display screen is increased, that is, the side wall area of the display screen is increased. Therefore, the contact area of the display screen with the gas and the shell inside the head-up display for heat conduction is increased, and the heat dissipation efficiency of the display screen is improved. At the same time, the thicker display screen can absorb the heat on the light spot formed by the focusing of sunlight on the display screen faster, avoiding the situation that the heat load is too heavy due to the concentration of heat on the display screen, thereby prolonging the service life of the display screen. That is, the service life of the head-up display is prolonged, and the user experience is improved.

[0077] An embodiment of the present application provides a vehicle, which includes the above-mentioned head-up display 500.

[0078] The head-up display 500 installed in a vehicle provided in an embodiment of the present application incorporates the aforementioned display screen. By increasing the thickness of the display screen, the sidewall area of ​​the display screen is increased, thereby increasing the contact area between the display screen, the gas inside the head-up display, and the housing for heat conduction, thereby improving the display screen's heat dissipation efficiency. Furthermore, the thicker display screen more quickly absorbs heat from the spot of light formed by focused sunlight on the display screen, preventing heat concentration on the display screen and causing excessive heat load. This extends the service life of the display screen, and thus the head-up display 500, and reduces the need for frequent repair or replacement of the head-up display 500. Furthermore, while a user is driving the vehicle, this prevents the user from being unable to properly view auxiliary information on the front windshield due to damage to the head-up display 500, thereby improving driving safety.

[0079] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0080] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A display screen, characterized in that: The display screen is applied to a head-up display (500), and comprises a liquid crystal element (100), a first polarization layer (200), a second polarization layer (300), and at least one heat dissipation layer (410, 420, 430, 440); The liquid crystal element (100) comprises a liquid crystal layer (110), a filter (120), a first glass substrate (130), and a second glass substrate (140); the liquid crystal layer (110) is encapsulated between the first glass substrate (130) and the second glass substrate (140); and the filter (120) is located on either side of the first glass substrate (130) or on either side of the second glass substrate (140); The first polarizing layer (200) is located on a side of the liquid crystal element (100) close to the optical component (510) of the head-up display (500), and the second polarizing layer (300) is located on a side of the liquid crystal element (100) facing away from the optical component (510); The at least one heat dissipation layer (410, 420, 430, 440) is located on any surface of the first polarization layer (200), any surface of the second polarization layer (300), any surface of the first glass substrate (130), or any surface of the second glass substrate (140); wherein the at least one heat dissipation layer comprises a first sub-heat dissipation layer (410), a surface of the first sub-heat dissipation layer (410) facing away from the optical component (510) is in contact with a surface of the liquid crystal element (100) close to the optical component (510), and a surface of the first sub-heat dissipation layer (410) close to the optical component (510) is spaced apart from a surface of the first polarization layer (200) facing away from the optical component (510); Parallel light rays incident from the light outlet (520) of the head-up display (500) into the head-up display (500) are reflected and converged by the optical component (510) to form a focus near the liquid crystal element (100).

2. The display screen according to claim 1, wherein: The at least one heat dissipation layer includes a second sub-heat dissipation layer (420); A side of the second sub-heat dissipation layer (420) close to the optical component (510) is in contact with a side of the liquid crystal element (100) facing away from the optical component (510).

3. The display screen according to claim 1, wherein: The at least one heat dissipation layer further comprises a third sub-heat dissipation layer (430), and the third sub-heat dissipation layer (430) is in contact with a surface of the first polarization layer (200) close to the optical component (510).

4. The display screen according to claim 1, wherein: The at least one heat dissipation layer further comprises a fourth sub-heat dissipation layer (440), and the fourth sub-heat dissipation layer (440) is in contact with a side of the second polarization layer (300) facing away from the optical component (510).

5. The display screen according to claim 1, wherein: The at least one heat dissipation layer (410, 420, 430, 440) is a solid structure.

6. The display screen according to claim 1, wherein: The at least one heat dissipation layer (410, 420, 430, 440) is a structure provided with a hollow area, wherein the hollow area is filled with a heat-conducting liquid.

7. The display screen according to claim 1, wherein: The first sub-heat dissipation layer (410) and the first glass substrate (130) are an integrally formed structure.

8. The display screen according to claim 2, wherein: The second sub-heat dissipation layer (420) and the second glass substrate (140) are an integrally formed structure.

9. A head-up display, characterized in that: The head-up display (500) comprises a display screen according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle includes a head-up display (500) as claimed in claim 9.

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