PHUD lens structure

Abstract

The utility model discloses a PHUD lens structure which comprises a display screen, a glass lens and a windshield glass, a backlight source is used for providing image light, the glass lens is used for enabling the image light output by the display screen to penetrate through and irradiate the windshield glass, and the windshield glass is used for reflecting the image light to human eyes. The glass lens is provided with a concave surface and a plurality of annular gullies, the concave surface is used for carrying out distortion calibration on image light, and the annular gullies are used for enabling the glass lens to form a Fresnel lens and amplifying the image light. According to the PHUD lens structure provided by the utility model, the concave surface and the plurality of annular gullies are arranged on the glass lens to form the Fresnel lens, so that not only is an image amplification effect achieved, but also a distortion calibration effect on an image is achieved, and therefore, a too large display screen is not needed, the production cost is reduced, and the popularization and the use of the technology are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to head-up display technical field especially relates to a PHUD lens structure. BACKGROUND

[0002] PHUD full view head-up display is a device that projects the virtual image of vehicle speed, navigation and other driving information on the front windshield glass direction by using optical principle. The main purpose of this device is to reduce the driver's head to watch the instrument panel or navigation, etc. and keep the line of sight on the road conditions to improve driving safety. Generally speaking, the PHUD light path system mainly consists of an image source display module and a reflective imaging module, wherein the image source display module includes a projection light machine, a diffusion sheet and a projection adjusting mirror, etc. The image information displayed by the image source PGU is enlarged by the reflection of the plane or curved mirror (folding mirror and rotatable mirror), and finally reflected to the eye movement area of the driver through the windshield glass.

[0003] When the display screen of the existing PHUD projects the image to the windshield by reflection, the edge of the projected image has slight distortion due to the curved windshield, and since the display screen image and the projected image are almost 1:1 isometric, in order to realize a larger image, a larger display screen is needed, and the larger display screen occupies a large space in the vehicle, resulting in high cost, which is not conducive to the popularization and use of the technology. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a PHUD lens structure aiming at the above technical problems, which forms a Fresnel lens by setting a concave surface and a plurality of annular grooves on the glass lens, and replaces the ordinary glass lens with the Fresnel lens, which not only plays a role in image magnification, but also forms a perfect image according to the principle of equal optical path. At this time, since the windshield is curved, the curved parts on both sides are closer to the display screen, so the thickness of the glass lens at both ends is increased to form a concave surface, so that the light emitted by the display screen reaches the windshield at equal optical path, thereby correcting the distortion of the image, so that the driver can see the displayed information without lowering his head when driving. This design can greatly enhance the safety and comfort of driving. Due to the magnification effect of the Fresnel lens, a larger display screen is not needed, thereby reducing the space occupied in the vehicle and reducing the production cost, which is more conducive to the popularization and use of the technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A PHUD lens structure comprises:

[0007] The display screen, the glass lens and the windshield glass, the backlight source is used for providing image light, the glass lens is used for making the image light outputted by the display screen to pass through and irradiate to the windshield glass, the windshield glass is used for reflecting the image light to the human eye, the glass lens is provided with a concave surface and a plurality of annular grooves, the concave surface is used for calibrating distortion of the image light, and the plurality of annular grooves are used for making the glass lens form a Fresnel lens and magnify the image light.

[0008] Further, the glass lens is provided with a plane far from the concave surface.

[0009] Further, the grooves are arranged on the concave surface of the glass lens.

[0010] Further, the grooves are arranged on the plane of the glass lens.

[0011] Further, the grooves on the glass lens are made by UV imprinting.

[0012] Further, the material of the glass lens is one of PC, glass or sapphire.

[0013] Further, the display screen is one of an LCD screen, an LED screen or a DLP projection system.

[0014] Further, the glass lens is integrated on the windshield glass.

[0015] Further, the outer side of the glass lens is provided with a waterproof film.

[0016] Further, the auxiliary lens is combined with the glass lens and is one or more combinations of a spherical mirror, a reflecting mirror, an aspherical surface or a free curved surface.

[0017] Compared with the prior art, the display screen has the following beneficial effects:

[0018] The PHUD lens structure has the waterproof film arranged on the outer side of the glass lens, the waterproof film is a special coating technology, can reduce the contact area of water and oil and the lens surface, so that the water droplets and the oil stains are not easy to adhere to the lens surface, is favorable for improving the display definition of the image, and the auxiliary lens is combined with the glass lens, the direction of the light path can be adjusted, so that the light path is folded to the minimum volume.

[0019] The PHUD lens structure provided by the utility model has the advantages that the concave surface and the plurality of annular grooves are arranged on the glass lens to form the Fresnel lens, the ordinary glass lens is replaced by the Fresnel lens, the image magnification effect is achieved, according to the principle that the perfect image can be formed according to the equal optical path, the windscreen glass is curved, the two curved parts are close to the display screen, therefore, the glass thickness of the two ends of the glass lens is increased, the concave surface is formed, the light emitted by the display screen reaches the windscreen glass at the equal optical path, the image is calibrated and distorted, the driver does not need to lower the head when driving, and the displayed information can be seen, the design can greatly enhance the driving safety and comfort, due to the magnification effect of the Fresnel lens, a large display screen is not needed, the space occupied in the vehicle is reduced, the production cost is reduced, and the technology is more favorable to popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model provides the structure schematic diagram of PHUD lens structure.

[0021] Figure 2 The utility model provides the front view structure schematic diagram of glass lens of PHUD lens structure.

[0022] Figure 3 The utility model provides the front view structure schematic diagram of glass lens of PHUD lens structure.

[0023] Figure 4 The utility model provides the structure schematic diagram of PHUD lens structure of increasing auxiliary lens.

[0024] Markings in the drawing are as follows:

[0025] 1, display screen, 2, glass lens, 3, windscreen glass, 4, image light, 5, concave surface, 6, groove, 7, human eye, 8, plane, 9, auxiliary lens. DETAILED DESCRIPTION

[0026] In order to enable the personnel in the technical field to understand the utility model scheme better, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor should belong to the range of protection of the utility model.

[0027] As described in the background, the display screen of the existing PHUD projects the image to the windshield by reflection, and due to the fact that the windshield is curved, the edge of the projected image is slightly distorted, and due to the fact that the display screen image and the projected image are almost 1:1 isometric, in order to realize a larger image, a larger display screen needs to be used, and the larger display screen occupies a large space in the vehicle, resulting in high cost, which is not conducive to the popularization and use of the technology.

[0028] In order to solve this technical problem, the utility model provides a PHUD lens structure, which forms a Fresnel lens by setting a concave surface 5 and a plurality of annular grooves 6 on the glass lens 2, and replaces the ordinary glass lens 2 with the Fresnel lens, which not only plays a role of image magnification, but also forms a perfect image according to the principle of equal optical path, and at this time, due to the fact that the windshield 3 is curved, the two curved parts are closer to the display screen 1, so the thickness of the glass lens 2 at both ends is increased to form a concave surface 5, so that the light emitted by the display screen 1 reaches the windshield 3 with equal optical path, thereby playing a role of correcting distortion of the image, so that the driver does not need to lower his head when driving, and can see the displayed information, which greatly enhances the safety and comfort of driving. Due to the magnification effect of the Fresnel lens, a larger display screen 1 is not needed, thereby reducing the space occupied in the vehicle and reducing the production cost.

[0029] Specifically, please refer to Figures 1-3 , the PHUD lens structure specifically comprises:

[0030] a display screen 1, a glass lens 2 and a windshield 3, the glass lens 2 is a lens structure, the display screen 1 is used for providing image light, the glass lens 2 is used for making the image light 4 output by the display screen 1 pass through and irradiate to the windshield 3, and the windshield 3 is used for reflecting the image light 4 to the human eye 7;

[0031] The glass lens 2 is provided with a concave surface 5 and a plurality of annular grooves 6, the concave surface 5 is used for correcting distortion of the image light 4, and the plurality of annular grooves 6 are used for making the glass lens 2 form a Fresnel lens and magnify the image light 4, specifically, the thickness and shape of the glass lens 2 are designed according to the curvature of the windshield 3, the shape of the Fresnel is designed according to the shape of the windshield 3, the size of the display screen 1 and the required magnification, so as to meet the design requirements.

[0032] The PHUD lens structure provided by the utility model, through the replacement of the common glass lens 2 by the Fresnel lens, not only plays the role of image amplification, but also forms a perfect image according to the principle of equal optical path, at this time, since the windshield glass 3 is curved, the two curved parts are closer to the display screen 1, therefore, the glass thickness of the two ends of the glass lens 2 is increased, a concave surface 5 is formed, the light emitted by the display screen 1 reaches the windshield glass 3 at the equal optical path, thereby playing the role of correcting distortion on the image, so that the driver does not need to lower his head when driving, and the displayed information can be seen, and the design can greatly enhance the safety and comfort of driving.

[0033] In order for those skilled in the art to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings.

[0034] It should be noted that, in the case of no conflict, the embodiments and the features and technical solutions in the embodiments in the utility model can be combined with each other.

[0035] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0036] Please refer to Figures 1-3 A PHUD lens structure, which comprises a display screen 1, a glass lens 2 and a windshield glass 3, the display screen 1 is used for providing image light, the glass lens 2 is a lens structure, the glass lens 2 is used for making the image light 4 output by the display screen 1 pass through and irradiate to the windshield glass 3, and the windshield glass 3 is used for reflecting the image light 4 to a human eye 7.

[0037] The glass lens 2 is provided with a concave surface 5 and a plurality of annular grooves 6, the concave surface 5 is used for correcting distortion of the image light 4, and the plurality of annular grooves 6 are used for making the glass lens 2 form a Fresnel lens and amplify the image light 4.

[0038] The PHUD lens structure provided by the embodiment forms a Fresnel lens by setting a concave surface 5 and a plurality of annular grooves 6 on the glass lens 2, and replaces the ordinary glass lens 2 with the Fresnel lens, which not only plays a role of image magnification, but also forms a perfect image according to the principle of equal optical path. At this time, since the windshield 3 is curved, the two curved parts are closer to the display screen 1, so the thickness of the glass lens 2 at both ends is increased to form the concave surface 5, so that the light emitted by the display screen 1 reaches the windshield 3 at an equal optical path, thereby playing a role of correcting distortion of the image, so that the driver does not need to lower his head when driving, and can see the displayed information. This design can greatly enhance the safety and comfort of driving. Due to the magnification effect of the Fresnel lens, a large display screen 1 is not needed, thereby reducing the space occupied in the vehicle and reducing the production cost, which is more conducive to the popularization and use of the technology.

[0039] The PHUD lens structure provided by the embodiment 1 is further optimized, and specifically, as shown in Figure 1 and Figure 3 , the side of the glass lens 2 away from the concave surface 5 is a flat surface 8, the grooves 6 are arranged at the concave surface 5 of the glass lens 2, the grooves 6 on the glass lens 2 are made by UV embossing, and the material of the glass lens 2 is one of PC, glass or sapphire.

[0040] Specifically, the thickness and shape of the glass lens 2 are designed according to the curvature of the windshield 3, the shape of the Fresnel is designed according to the shape of the windshield 3, the size of the display screen 1 and the required magnification, so as to meet the design requirements, and the grooves 6 on the glass lens 2 are made by UV embossing, which is more convenient to process.

[0041] The PHUD lens structure provided by the embodiment 1 or 2 is further optimized, as shown in Figure 1 and Figure 2 , the grooves 6 are arranged at the flat surface 8 of the glass lens 2, the display screen 1 is one of an LCD screen, an LED screen or a DLP projection system, and in order to produce a high-brightness image, a light homogenizer, an electronic controller, a communication module, a heat dissipation module and the like can be further arranged;

[0042] The glass lens 2 is integrated on the windshield 3, so that the glass lens 2 can be arranged in front of the windshield 3 through a separate structure such as a support. When the glass lens 2 is pre-purchased by a car manufacturer, the curvature of the glass lens 2 can be adapted to the curvature of the windshield 3, and a large space between the instrument panel and the windshield 3 is utilized, so that the head-up display can be applied to various vehicle models.

[0043] In further optimization of the PHUD lens structure provided in the above embodiments, the outer side of the glass lens 2 is provided with a waterproof film, which is a special coating technology, can reduce the contact area of water and oil with the lens surface, so that water droplets and dirt are not easy to adhere to the lens surface, the waterproof film is usually very thin, generally about 0.005-0.01 microns, and has hydrophobic and oleophobic properties, and is usually coated with fluoride on the surface of the glass lens 2 by vacuum coating to form a protective layer, so that the glass lens 2 is easier to clean, and the light reflection on the surface of the glass lens 2 is also reduced, and the clarity is improved.

[0044] In order to further improve the quality of imaging, an auxiliary lens 9 is further included, as shown in the figure, Figure 4 The auxiliary lens 9 is a reflecting mirror, which is used in cooperation with the glass lens 2 to adjust the direction of the light path, so as to fold the light path to the minimum volume, and the specific auxiliary lens 9 can be a spherical mirror, a reflecting mirror, a lens, a prism, a aspherical reflecting mirror, a free-form mirror and other optical components known to engineers in the industry, and the combination of these different components does not deviate from the protection scope of the utility model.

[0045] The use process of the PHUD lens structure provided by the utility model is as follows:

[0046] By providing the concave surface 5 and the plurality of annular grooves 6 on the glass lens 2 to form a Fresnel lens, and replacing the ordinary glass lens 2 with the Fresnel lens, not only the image magnification effect is achieved, but also according to the principle of equal optical path, a perfect image can be formed, at this time, since the windshield 3 is curved, the two curved parts are closer to the display screen 1, therefore, the thickness of the glass lens 2 at both ends is increased to form the concave surface 5, so that the light emitted by the display screen 1 reaches the windshield 3 with equal optical path, thereby correcting the distortion of the image, so that the driver does not need to lower his head when driving, and can see the displayed information, which greatly enhances the safety and comfort of driving, due to the magnification effect of the Fresnel lens, a large display screen 1 is not needed, thereby reducing the space occupied in the vehicle and reducing the production cost, and the technology is more conducive to popularization and use.

[0047] In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected or in communication with each other, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0048] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A PHUD lens structure, characterized by, It includes: A display screen (1) for providing image light, a glass lens (2) for passing and irradiating the image light (4) output by the display screen (1) to the windshield (3), and the windshield (3) for reflecting the image light (4) to the human eye (7); The glass lens (2) is provided with a concave surface (5) for calibrating the distortion of the image light (4) and a plurality of annular grooves (6) for forming a Fresnel lens and magnifying the image light (4).

2. The PHUD lens structure of claim 1, wherein, The glass lens (2) is provided with a flat surface (8) away from the concave surface (5).

3. The PHUD lens structure of claim 2, wherein, The grooves (6) are arranged at the concave surface (5) of the glass lens (2).

4. The PHUD lens structure of claim 2, wherein, The grooves (6) are arranged at the flat surface (8) of the glass lens (2).

5. The PHUD lens structure of claim 1, wherein, The grooves (6) on the glass lens (2) are made by UV embossing.

6. The PHUD lens structure of claim 1, wherein, The material of the glass lens (2) is one of PC, glass or sapphire.

7. The PHUD lens structure of claim 1, wherein, The display screen (1) is one of an LCD screen, an LED screen or a DLP projection system.

8. The PHUD lens structure of claim 1, wherein, The glass lens (2) is integrated on the windshield (3).

9. The PHUD lens structure of claim 1, wherein, The outer side of the glass lens (2) is provided with a waterproof film.

10. The PHUD lens structure of claim 1, wherein, It also includes an auxiliary lens (9) which is one or a combination of a spherical mirror, a reflecting mirror, an aspherical surface or a free-form surface and is used in cooperation with the glass lens (2).

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