CN-224208770-U - Head-up display dust cover, head-up display and head-up display device

CN224208770UCN 224208770 UCN224208770 UCN 224208770UCN-224208770-U

Abstract

The utility model relates to the technical field of head-up displays, in particular to a head-up display dust cover, a head-up display and a head-up display device, wherein the dust cover comprises a light-transmitting cover body and a dust-proof plate adhered to the light-transmitting cover body; the dustproof plate comprises a polarizing film, a first supporting film and a second supporting film are respectively attached to the upper side and the lower side of the polarizing film, a functional coating is arranged on the upper surface of the first supporting film, and the second supporting film is attached to the light-transmitting cover body. The dust cover of the head-up display provided by the utility model adopts the composite structure of the light-transmitting cover body and the dust cover, so that the dust cover has certain thickness and hardness, the polarized film of the dust cover is utilized to realize the signal partition of light, the dazzling white light generated by reflection during direct sunlight is avoided, the anti-dazzle effect is good, and simultaneously, the functions of scratch prevention, static resistance, infrared absorption and the like of the dust cover can be realized by combining the functional coating.

Inventors

ZHOU WENXIAN
LI MINGQUAN
MA JIACHUN
ZHANG XING
CAI JUNQI

Assignees

佛山纬达光电材料股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250508

Claims (10)

1. A head-up display dust cover is characterized by comprising a light-transmitting cover body and a dust-proof plate adhered to the light-transmitting cover body, wherein the dust-proof plate comprises a polarizing film, a first supporting film and a second supporting film are respectively adhered to the upper side and the lower side of the polarizing film, a functional coating is arranged on the upper surface of the first supporting film, the second supporting film is adhered to the light-transmitting cover body, and the phase delay value of the first supporting film and the second supporting film is 0-100 nm or more than or equal to 2000nm.
2. The head-up display dust cover of claim 1, wherein the first support film and the second support film have a thickness difference of 50 μm or less.
3. The head-up display dust cover according to claim 1, wherein the light-transmitting cover body is a plastic piece, the upper surface of the plastic piece is a concave curved surface, and the dust cover is glued on the curved surface of the light-transmitting cover body.
4. The head-up display dust cover of claim 1, wherein the base films of the first and second support films are PC, PMMA or TAC films.
5. The head-up display dust cover of claim 1, wherein the functional coating is one or more of an anti-scratch hardening layer, an anti-glare layer, an anti-oil stain anti-fingerprint coating, an anti-static coating, an anti-reflection coating, a waterproof coating, an anti-reflection coating, and an infrared absorption layer.
6. The head-up display dust cover of claim 1, wherein the polarizing film is respectively bonded with the first support film and the second support film through PSA glue, and the PSA glue is adhesive glue with an infrared blocking agent.
7. The head-up display dust cover according to claim 6, wherein the thickness of the PSA glue is between 3 μm and 30 μm, the infrared transmittance of the PSA glue is between 15 and 70% in the wavelength band of 800 and 1200nm, and the transmittance of the PSA glue is between 60 and 98% in the wavelength band of 380 and 800 nm.
8. The head-up display dust cover according to claim 1, wherein the thickness of the polarizing film is 100-300 μm, and the thickness of the dust cover is 300-1000 μm.
9. A head-up display is characterized by comprising an image generating unit, a first reflecting mirror, a second reflecting mirror and a dust cover, wherein the image generating unit is used for generating light rays with image information, the first reflecting mirror is used for reflecting the light rays with the image information to the second reflecting mirror, the second reflecting mirror is used for reflecting the light rays with the image information to the dust cover, the dust cover is used for preventing dust and transmitting the light rays with the image information, and the second reflecting mirror is positioned below the dust cover, and the dust cover is the head-up display dust cover according to any one of claims 1-8.
10. A head-up display device comprising a windscreen and a head-up display according to claim 9, wherein the windscreen is arranged in the direction of light emission of the dust cap.

Description

Head-up display dust cover, head-up display and head-up display device Technical Field The utility model relates to the technical field of head-up displays, in particular to a head-up display dust cover, a head-up display and a head-up display device. Background Head Up Displays (HUDs), for short, are commonly used in aircraft flight aids, and are now becoming popular in automobiles. The automobile head-up display system aims at forming a virtual image of the driving information of an automobile, and projecting the virtual image in front of a driver for a certain distance, so that the driver obtains the required driving information in a head-up state, traffic accidents caused by low head viewing of the driving information are avoided, and the safety of the automobile is improved. The head-up display HUD mainly comprises an image generating unit (Picture Generation Unit, PGU) and an optical display system, wherein the image generating unit is used for generating HUD output images, and the optical display system is used for displaying the images. After the image is emitted from the image source PGU, the image is projected on a windshield after two reflections. Therefore, a relatively large opening is typically present after the HUD is mounted to the instrument desk, through which dust in the air can easily be deposited into the HUD during use. In order to prevent dust deposition on the mirror surface from affecting the projection light path of the HUD, an optical transparent dust cover needs to be added to the opening. And because the reflecting mirror is arranged below the dust cover, when the sunlight is directly irradiated, the reflecting mirror reflects the sunlight and causes serious glare, so that the display effect is poor. Disclosure of utility model The utility model aims to provide a head-up display dust cover capable of avoiding reflected glaring white light and further reducing glare, which at least provides a beneficial selection or creation condition for solving one or more technical problems in the prior art. In order to achieve the above purpose, the utility model adopts the following technical scheme. A head-up display dust cover comprises a light-transmitting cover body and a dust-proof plate adhered to the light-transmitting cover body, wherein the dust-proof plate comprises a polarizing film, a first supporting film and a second supporting film are respectively adhered to the upper side and the lower side of the polarizing film, a functional coating is arranged on the upper surface of the first supporting film, and the second supporting film is adhered to the light-transmitting cover body. More preferably, the difference in thickness between the first support film and the second support film is 50 μm or less. More preferably, the light-transmitting cover body is a plastic piece, the upper surface of the plastic piece is a concave curved surface, and the dust-proof plate is glued on the curved surface of the light-transmitting cover body. More preferably, the base film of the support film is a PC film, a PMMA film or a TAC film, and the phase retardation value of the support film at the wavelength of 550nm is 0-100 nm or more than or equal to 2000nm. More preferably, the functional coating is one or more of an anti-scratch hardening layer, an anti-dazzle layer, an oil-stain-proof anti-fingerprint coating, an antistatic coating, an anti-reflection coating, a waterproof coating, an anti-reflection coating and an infrared absorption layer. More preferably, the polarizing film is respectively attached to the first support film and the second support film through PSA glue, and the PSA glue is adhesive glue with an infrared blocking agent. More preferably, the thickness of the PSA glue is 3-30 μm, and the infrared transmittance of the PSA glue in the wavelength band of 800-1200 nm is 15-70%, and even more preferably 18-50%. The transmittance in the wavelength range of 380 to 800nm is 60 to 98%, more preferably 75 to 98%. More preferably, the thickness of the polarizing film is 100 to 300 μm, and the thickness of the dust-proof plate 42 is 300 to 1000 μm. On the other hand, the utility model further provides a head-up display, which comprises an image generating unit, a first reflecting mirror, a second reflecting mirror and a dust cover, wherein the image generating unit is used for generating light rays with image information, the first reflecting mirror is used for reflecting the light rays with the image information to the second reflecting mirror, the second reflecting mirror is used for reflecting the light rays with the image information to the dust cover, the dust cover is used for preventing dust and transmitting the light rays with the image information, the second reflecting mirror is positioned below the dust cover, and the dust cover is the head-up display dust cover. On the other hand, the utility model also provides a head-up display device which comprises windshield glass and the h