A puhd panoramic head-up display optical system with high reflection structure windshield glass

Abstract

This invention discloses a PUHD panoramic head-up display optical system with a high-reflectivity windshield. It includes an image source, from which light is projected onto the windshield. The windshield has a reflective film layer that enhances the light energy from the image source. It also has a black coating layer that enhances the contrast of the displayed image and absorbs light to prevent ghosting. The light emitted from the image source is reflected by the windshield and enters the human eye. The human eye perceives a virtual image located on a virtual image surface in front of the windshield. The windshield, the black coating layer, and the reflective film layer constitute a high-reflectivity windshield structure. This invention improves the reflectivity of the windshield display area by setting a reflective film layer in the black display area of ​​the black coating layer. This windshield can reflect more than 30% of the light energy from the backlight module screen (reflectivity is adjustable), increasing the brightness to the eye and significantly reducing the brightness, backlight power, and cost of the backlight module.

Description

Technical Field

[0001] This utility model belongs to the field of truck HUD layout technology, specifically relating to a PUHD panoramic head-up display optical system with a windshield glass featuring a high-reflectivity structure. Background Technology

[0002] PHUD has a larger FOV and higher image quality (resolution, color gamut, brightness, contrast, etc.) than W-HUD and AR-HUD. Its optical system and size are also simpler and smaller than W-HUD and AR-HUD, making it more suitable for automotive space design.

[0003] like Figure 1 The image shown is a PHUD windshield in the prior art, which consists of a windshield glass and a black coating, as shown. Figure 2 The diagram shown is a schematic of the optical system of the PHUD windshield in this prior art. Figure 1 and Figure 2 It is known that existing PHUD windshields use a black coating on the inner surface of the glass to enhance the contrast of the displayed image. However, black ink absorbs light, which causes the light energy projected by the backlight module screen to be lost. At the same time, the reflectivity of car windshields is low (<13%). Both factors result in very low brightness of the light emitted from the backlight module after passing through the windshield and entering the human eye. To enable the driver to see a clear image, the brightness of the backlight module must be increased. This will lead to an increase in the cost and power of the backlight module, increase the design difficulty, and hinder the popularization of PHUDs. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a PUHD panoramic head-up display optical system with a windshield featuring a high-reflectivity structure. This system aims to solve the problem that existing PHUD windshields require increasing the brightness of the backlight module to provide drivers with a clear image, which leads to increased cost and power consumption of the backlight module.

[0006] (2) Technical solution

[0007] To address the aforementioned technical problems, this utility model provides a PUHD panoramic head-up display optical system with a high-reflectivity windshield, comprising an image source, the light emitted from which is projected onto the windshield, a reflective film layer on the windshield to enhance the light energy of the image source, and a black coating layer on the windshield to enhance the contrast of the displayed image and absorb light to avoid ghosting. The light emitted from the image source is reflected by the windshield and enters the human eye, where the human eye perceives a virtual image located on a virtual image surface in front of the windshield. The windshield, the black coating layer, and the reflective film layer constitute a high-reflectivity windshield structure.

[0008] Preferably, the black coating layer is applied to the windshield.

[0009] Furthermore, the reflective film layer is disposed on the black coating.

[0010] Furthermore, the reflective film layer is composed of n layers of alternating high-reflectivity material layer and at least low-reflectivity material layer.

[0011] Furthermore, the high reflectivity material layer is made of any one of niobium pentoxide, titanium oxide, aluminum, or silver.

[0012] Furthermore, the low-reflectivity material layer is silicon dioxide.

[0013] Furthermore, a second black coating layer is provided on the reflective film layer, a base layer is provided on the side of the second black coating layer away from the reflective film layer, and an adhesive layer is provided on the side of the base layer away from the second black coating layer.

[0014] Furthermore, a base layer is provided on the reflective film layer, a second black coating layer is provided on the side of the base layer away from the reflective film layer, and an adhesive layer is provided on the side of the second black coating layer away from the base layer.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention improves the reflectivity of the windshield display area by setting a reflective film layer in the black display area of ​​the black coating layer. The windshield can reflect more than 30% of the light energy of the backlight module screen (the reflectivity is adjustable), which improves the brightness of the light entering the eye and greatly reduces the brightness, backlight power and cost of the backlight module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the existing PHUD windshield structure.

[0019] Figure 2 This is a schematic diagram of the existing PHUD windshield optical system.

[0020] Figure 3 This is a schematic diagram of the PHUD windshield optical system of this utility model.

[0021] Figure 4 This is a schematic diagram of the PHUD windshield structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the reflective film structure in Embodiment 1 of this utility model.

[0023] Figure 6 This is a schematic diagram of the reflective film structure in Embodiment 2 of this utility model.

[0024] Figure 7 This is a schematic diagram of the reflective film structure in Embodiment 3 of this utility model.

[0025] The labels in the attached diagram are as follows: 1. Image source; 2. Reflective film layer; 3. Black coating layer; 4. Windshield glass; 5. Human eye; 6. Virtual image surface; 201. High reflectivity material layer; 202. Low reflectivity material layer; 203. Adhesive layer; 204. Second black coating layer; 205. Base layer. Detailed Implementation

[0026] This specific embodiment is a PUHD panoramic head-up display optical system with a high-reflectivity windshield glass structure, and its structural schematic diagram is shown below. Figure 3 Figure 7 As shown.

[0027] Example 1

[0028] like Figure 3 Figure 5 As shown, the windshield includes an image source 1, the light emitted from the image source 1 is projected onto the windshield 4, the windshield 4 is provided with a reflective film layer 2 to enhance the light energy of the image source 1, the windshield 4 is also provided with a black coating layer 3 to enhance the contrast of the displayed image and absorb light to avoid ghosting, the light emitted from the image source 1 is reflected by the windshield 4 and enters the human eye 5, the human eye 5 perceives a virtual image located on the virtual image surface 6 in front of the windshield 4, the windshield 4, the black coating layer 3 and the reflective film layer 2 constitute a high reflectivity windshield structure.

[0029] In this embodiment, the black coating layer 3 is disposed on the windshield 4. Specifically, the black coating layer 3 can be directly disposed on the windshield 4, or it can be screen-printed or coated on PET or PC film and then attached to the windshield 4. The black coating layer 3 is used to enhance the contrast of the display image, solve ghosting, and prevent sunlight backflow.

[0030] In this embodiment, the reflective film layer 2 is disposed on the black coating layer 3. The reflective film layer 2 can be directly coated on the black coating layer 3 of the windshield 4, or it can be coated on a PET or PC film and then attached to the windshield 4. The function of the reflective film layer 2 is to improve the reflection of light emitted by the image source 1, so that more light energy can enter the human eye 5 and increase the brightness.

[0031] like Figure 5As shown: In this embodiment, the reflective film layer 2 is composed of at least one high reflectivity material layer 201 and at least one low reflectivity material layer 202, which are alternately arranged into n layers. Specifically, the arrangement order of the high reflectivity material layer 201 and the low reflectivity material layer 202 in the n layers is not specified, with the high reflectivity material layer 201 on top and the low reflectivity material layer 202 on the bottom. The reflectivity of the reflective film layer 2 can be adjusted according to parameters such as the number of layers n and the thickness of the reflective film layer 2. The reflectivity can be determined according to the actual display effect of the PHUD.

[0032] The reflective film layer 2 can be fabricated using vacuum coating or magnetron sputtering.

[0033] In this embodiment, the high reflectivity material layer 201 is made of materials including but not limited to niobium pentoxide, titanium oxide, aluminum, and silver.

[0034] In this embodiment, the material of the low reflectivity material layer 202 includes, but is not limited to, silicon dioxide.

[0035] Example 2

[0036] Applying coating to windshields taller than 1.35m is extremely difficult because there are no coating machines of that size. To address this challenge, methods such as... Figure 6 As shown, in this embodiment, a second black coating layer 204 is provided on the reflective film layer 2, a base layer 205 is provided on the side of the second black coating layer 204 away from the reflective film layer 2, and an adhesive layer 203 is provided on the side of the base layer 205 away from the second black coating layer 204.

[0037] The reflective structure has a simple process and is highly operable. Specifically, the second black coating layer 204 is screen-printed or coated on the base layer 205. Then, n layers of high reflectivity material layer 201 and low reflectivity material layer 202 are directly deposited on the second black coating layer 204 to form a reflective film layer 2. Finally, an adhesive layer 203 is set on the other side of the base layer 205, which can be directly attached to the windshield 4.

[0038] In this embodiment, the base layer 205 is a PET or PC film material.

[0039] Example 3

[0040] The difference between this embodiment and embodiment two is that: a base layer 205 is provided on the reflective film layer 2, a second black coating layer 204 is provided on the side of the base layer 205 away from the reflective film layer 2, and an adhesive layer 203 is provided on the side of the second black coating layer 204 away from the base layer 205.

[0041] In this embodiment, the second black coating layer 204 is screen-printed or coated on the base layer 205, and then a reflective film layer 2 made of n layers of high reflectivity material layer 201 and low reflectivity material layer 202 is directly deposited on the base layer 205; finally, an adhesive layer 203 is set on the other side of the second black coating layer 204, which can be directly attached to the windshield 4.

[0042] In summary, this invention improves the reflectivity of the windshield 4 display area by setting a reflective film layer 2 in the black display area of ​​the black coating layer 3. The windshield 4 can reflect more than 30% of the light energy of the backlight module screen (the reflectivity is adjustable), improving the brightness to the eye and greatly reducing the brightness, backlight power, and cost of the backlight module. At the same time, two reflective film layer 2 structures with a second black coating layer 204 are designed to avoid the disadvantages of large-area windshield coating. The process is simple, feasible, and cost-effective.

[0043] All technical features in this embodiment can be freely combined according to actual needs.

[0044] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A PUHD panoramic head-up display optical system with a high-reflectivity windshield, characterized in that: The windshield (4) includes an image source (1), the light emitted by the image source (1) is projected onto the windshield (4), the windshield (4) is provided with a reflective film layer (2) to enhance the light energy of the image source (1), the windshield (4) is also provided with a black coating layer (3) to enhance the contrast of the displayed image and absorb light to avoid ghosting, the light emitted by the image source (1) is reflected by the windshield (4) and enters the human eye (5), the human eye (5) perceives the virtual image located on the virtual image surface (6) in front of the windshield (4), the windshield (4), the black coating layer (3) and the reflective film layer (2) constitute a high reflectivity windshield structure.

2. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 1, characterized in that, The black coating layer (3) is applied to the windshield (4).

3. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 1, characterized in that, The reflective film layer (2) is disposed on the black coating layer (3).

4. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 1, characterized in that, The reflective film layer (2) is composed of at least one high reflectivity material layer (201) and at least one low reflectivity material layer (202) alternating to form n layers.

5. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 4, characterized in that, The high reflectivity material layer (201) is made of any one of niobium pentoxide, titanium oxide, aluminum, or silver.

6. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 4, characterized in that, The low reflectivity material layer (202) is silicon dioxide.

7. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 3, characterized in that, A second black coating layer (204) is provided on the reflective film layer (2), and a base layer (205) is provided on the side of the second black coating layer (204) away from the reflective film layer (2), and an adhesive layer (203) is provided on the side of the base layer (205) away from the second black coating layer (204).

8. The PUHD panoramic head-up display optical system with a high-reflectivity windshield glass according to claim 1, characterized in that, A base layer (205) is provided on the reflective film layer (2), and a second black coating layer (204) is provided on the side of the base layer (205) away from the reflective film layer (2), and an adhesive layer (203) is provided on the side of the second black coating layer (204) away from the base layer (205).

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