CN210316901U

CN210316901U - HUD optical path system capable of being matched with polarized sunglasses to use and eliminating double images

Info

Publication number: CN210316901U
Application number: CN201821898293.XU
Authority: CN
Inventors: 马红虎; 朱妙贤; 王波
Original assignee: Foryou Multimedia Electronics Co Ltd
Current assignee: Foryou Multimedia Electronics Co Ltd
Priority date: 2018-06-19
Filing date: 2018-11-16
Publication date: 2020-04-14
Anticipated expiration: 2028-11-16

Abstract

The utility model relates to a HUD technical field specifically discloses a can cooperate polarisation sunglasses to use and eliminate HUD optical path system of ghost image, including light source module and reflection module, light source module outgoing P polarized light, the reflection module is including locating the speculum module in the HUD and can reflect P light, the car windshield of transmission S light. The beneficial effects are that: adopt the car windshield who includes this three layer construction of glass internal surface, P light reflection layer and glass surface at least, can reflect P light transmission S light, the P light of HUD outgoing can not filtered when the driver wears the polarisation sunglasses, and the image can not become dark, does not influence when consequently observing the image, just the utility model discloses do not have the requirement to windshield' S interior external surface angle, can be that wedge glass also can be parallel glass, the preparation degree of difficulty reduces, and is with low costs. The windshield glass that reflects P light cooperates the HUD that P light was emergent, can not produce the ghost image during image projection, and is also lower to the inside light path of HUD and structural design requirement.

Description

HUD optical path system capable of being matched with polarized sunglasses to use and eliminating double images

Technical Field

The utility model relates to a HUD technical field especially relates to a can cooperate polarisation sunglasses to use and eliminate HUD optical path system of ghost image.

Background

When light enters the glass from air, refraction (transmission) and reflection phenomena occur on the surface of the glass, and the ratio of the refracted light to the reflected light has a relationship with the angle of incidence, as can be seen from the relationship curve between the light intensity reflectance and the angle of incidence shown in fig. 1: the larger the angle of incidence, the more the reflected light and the varying ratio of P and S light in the reflected light, as shown in FIG. 2, when the angle of incidence reaches Brewster' S angle i₀When the light is reflected, the reflected light is basically S light, the P light is completely transmitted, the proportion of the reflected light is further increased along with the further increase of the incident angle, but the reflection proportion of the S light is improved more quickly.

In practical applications of a HUD of the windshield type (also known as WHUD), P light is hardly reflected in this region when the HUD transmits light at an angle of incidence of the windshield of approximately between 55 ° and 65 °.

The working principle of the polarized sunglasses is also based on the principle of brewster reflection, as shown in fig. 3, when the distance is far, a rough road surface looks the same as a mirror surface, if sunlight is reflected, glare is formed, the road surface reflection light is basically reflected light with large angle, the S polarized light accounts for a very large proportion, and one important function of the sunglasses is to filter the S light reflected by the road surface, so that the intercepting polarization direction is consistent with the direction of the S light on the road surface.

Ordinary windshield cooperation HUD work, windshield reflection light is S light, and S light is filtered when the driver wears the sunglasses, influences the driver and observes the image. The common windshield glass adopts common PVB, the inner surface and the outer surface of the glass are parallel, a main image is separated from a secondary image, and double images are easily caused, as shown in figure 4. To the ghost image problem, windshield can adopt wedge PVB, and top glass's thickness is greater than bottom glass's thickness, and main like coincides with the secondary image, as figure 5, but wedge glass processing is restricted by technology, and the cost of manufacture is high, and the wedge angle can produce the restraint to HUD design, promotes the design degree of difficulty.

Wedge glass eliminates the ghost image, can only remove to a certain angle and eliminate the projection at whole projection area completely, and wedge glass can require HUD's projection distance moreover, promotes the design degree of difficulty.

Disclosure of Invention

The utility model provides a can cooperate polarisation sunglasses to use and eliminate HUD optical path system of ghost image, the technical problem of solution is ordinary windshield cooperation HUD during operation, and its surface reflection 'S S light is filtered when the driver wears the sunglasses, influences the driver and observes the image, and leads to the ghost image phenomenon to be difficult to simply eliminate effectively because of ordinary windshield' S material and structure.

For solving above technical problem, the utility model provides a but cooperate polarisation sunglasses to use and eliminate HUD optical path system of ghost image, including light source module and reflection module, light source module outgoing P polarized light, the reflection module is including locating the speculum module in the HUD and can reflect the car windshield of P light, transmission S light.

Specifically, the automobile windshield glass is of a three-layer structure and comprises a glass inner surface, a P light reflection layer and a glass outer surface, wherein the reflectivity of the P light reflection layer to P light is 5% -20% so as to ensure that the light transmittance of the glass is more than 70%.

In a preferred embodiment of the present invention, the light source module is a TFT module, the TFT module adopts a TFT of 90 ° polarized light, and the polarization direction of the emergent light thereof is consistent with the polarization direction of the reflected light of the P light reflection layer, i.e. the polarization direction of the emergent light of the TFT is parallel to the short side direction of the TFT.

In another preferred embodiment of the present invention, the light source module is a TFT module, the TFT module adopts a TFT of 0 ° polarized light, the TFT surface of 0 ° polarized light is provided with a half glass sheet, the polarization direction of the emergent light thereof is consistent with the polarization direction of the reflected light of the P light reflection layer, that is, the polarization direction of the emergent light of the TFT is parallel to the short side direction of the TFT.

In another preferred embodiment of the present invention, the light source module is a PGU.

Preferably, the micro-projection PGU is a DLP, and a P light polarization plate is added to an image plane of the DLP to transmit P light, so as to ensure that the polarization direction of the emergent light is consistent with the polarization direction of the reflected light of the P light reflection layer.

Preferably, the micro-projection PGU is an LCOS, the LCOS uses a P-light projection, and a polarization direction of outgoing light of the LCOS is consistent with a polarization direction of reflected light of the P-light reflection layer, that is, the polarization direction of the outgoing light of the LCOS is parallel to a short side direction of an image.

The utility model provides a pair of can cooperate HUD optical path system that polarisation sunglasses used and eliminated the ghost image adopts the car windshield that includes this three layer construction of glass internal surface, P light reflection layer and glass surface at least, can reflect P light transmission S light, and the P light of HUD outgoing can not filtered when the driver wears the polarisation sunglasses, and the image can not become dark, does not influence when consequently observing the image, just the utility model discloses do not have the requirement to windshield' S inside and outside surface angle, can be that wedge glass also can be parallel glass, the preparation degree of difficulty reduces, and is with low costs. The windshield glass that reflects P light cooperates the HUD that P light was emergent, can not produce the ghost image during image projection, and is also lower to the inside light path of HUD and structural design requirement.

Drawings

FIG. 1 is a graph of the relationship between the light intensity reflectivity and the incident angle provided by the present invention;

FIG. 2 is a schematic diagram of the optical path of Brewster's law provided by the present invention;

fig. 3 is a schematic diagram of an optical path of the working of the polarized sunglasses provided by the present invention;

FIG. 4 is a schematic diagram of the optical path for generating double image by using a general PVB type windshield according to the present invention;

FIG. 5 is a schematic diagram of the optical path of the wedge-shaped PVB windshield without ghost image;

fig. 6 is a diagram of an optical path structure of a HUD optical path system that can be used with a polarized sunglass and eliminate double images according to an embodiment of the present invention;

fig. 7 is a schematic view of the windshield according to the embodiment of fig. 6 of the present invention.

Fig. 8 is a diagram illustrating the effect of the windshield applied to the HUD and viewed by the driver with sunglasses in the embodiment of fig. 6.

Detailed Description

The following embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are given for illustrative purposes only and are not to be construed as limiting the invention, including the drawings, which are only used for reference and illustration, and do not constitute a limitation to the scope of the invention, since many changes may be made thereto without departing from the spirit and scope of the invention.

The embodiment of the utility model provides a can cooperate polarisation sunglasses to use and eliminate HUD optical path system of ghost image, its light path structure chart is shown in FIG. 6, including light source module 1 and reflection module 2, light source module 1 outgoing P polarized light, reflection module 2 is including locating speculum module 21 in the HUD and can reflect P light, the car windshield 22 of transmission S light.

Specifically, car windshield 22 is three layer construction, including glass internal surface, P light reflecting layer and glass surface, as shown in fig. 7, has clearly demonstrated the utility model provides a structure and the theory of operation of windshield 22 in the embodiment of fig. 6, if use this windshield 22 on the HUD, when then driver watches the HUD image with the sunglasses, its viewing effect is shown in fig. 8. The reflectivity of the P light reflecting layer to the P light is controlled to be between 5 and 20 percent so as to ensure that the light transmittance of the glass is more than 70 percent.

In this embodiment, the light source module 1 is a TFT module, the TFT module employs a TFT polarized at 90 degrees, and the polarization direction of the emergent light of the TFT module is the same as the polarization direction of the reflected light of the P light reflection layer, that is, the polarization direction of the emergent light of the TFT is parallel to the short side direction of the TFT.

In the utility model discloses a another preferred embodiment, light source module 1 is the TFT module, the TFT module adopts the TFT of 0 polarisation, the TFT surface of 0 polarisation is equipped with half slide to guarantee its emergent light polarization direction with the reverberation polarization direction on P light reflection layer is unanimous, and the polarization direction that also is the TFT emergent light is parallel with TFT minor face direction, can select 90 with the polarization state, changes S polarized light into P polarized light promptly.

In another preferred embodiment of the present invention, the light source module 1 is a micro-projection PGU.

In this embodiment, preferably, the micro-projection PGU adds a P light polarization plate to an image plane of the DLP, and is configured to transmit P light, so as to ensure that a polarization direction of outgoing light of the micro-projection PGU is consistent with a polarization direction of reflected light of the P light reflection layer, and natural light can be converted into P light for outgoing.

The embodiment of the utility model provides a pair of HUD optical path system that can cooperate polarisation sunglasses to use and eliminate the ghost image adopts the car windshield that includes this three layer construction of glass internal surface, P light reflection layer and glass surface at least, can reflect P light transmission S light, and the P light of HUD outgoing can not filtered when the driver wears the polarisation sunglasses, and the image can not be dark, does not influence when consequently observing the image, just the utility model discloses do not have the requirement to windshield' S inside and outside surface angle, can be that wedge glass also can be parallel glass, the preparation degree of difficulty reduces, and is with low costs. The windshield glass that reflects P light cooperates the HUD that P light was emergent, can not produce the ghost image during image projection, and is also lower to the inside light path of HUD and structural design requirement.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides a can cooperate HUD optical path system that polarisation sunglasses used and eliminate ghost image, includes light source module and reflection module, its characterized in that, light source module outgoing P polarized light, the reflection module is including locating the speculum module in the HUD and can reflect P light, the car windshield of transmission S light.

2. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 1, wherein: the automobile windshield glass is of a three-layer structure and comprises a glass inner surface, a P light reflection layer and a glass outer surface, wherein the reflectivity of the P light reflection layer to P light is 5% -20% so as to ensure that the light transmittance of the glass is more than 70%.

3. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 2, wherein: the light source module is a TFT module, the TFT module adopts a TFT with 90-degree polarization, and the polarization direction of emergent light of the TFT module is consistent with the polarization direction of reflected light of the P light reflection layer, namely the polarization direction of the emergent light of the TFT is parallel to the short side direction of the TFT.

4. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 2, wherein: the light source module is a TFT module, the TFT module adopts a TFT with 0-degree polarization, and the surface of the TFT with 0-degree polarization is provided with a half glass slide so as to ensure that the polarization direction of emergent light of the TFT is consistent with the polarization direction of reflected light of the P light reflection layer, namely the polarization direction of the emergent light of the TFT is parallel to the short side direction of the TFT.

5. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 1, wherein: the light source module is a micro-projection PGU.

6. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 5, wherein: the micro-projection PGU is a DLP, and a P light polarization plate is additionally arranged on the image surface of the DLP and used for transmitting P light so as to ensure that the polarization direction of emergent light of the DLP light polarization plate is consistent with the polarization direction of reflected light of the P light reflection layer.

7. A HUD optical path system for use with polarized sunglasses and eliminating ghosts, as recited in claim 5, wherein: the micro-projection PGU is LCOS, the LCOS uses P light projection, the polarization direction of emergent light of the LCOS is consistent with the polarization direction of reflected light of the P light reflection layer, namely the polarization direction of the emergent light of the LCOS is parallel to the short edge direction of an image.