CN-224210879-U - Sun shield and vehicle using same

Abstract

The utility model relates to a sun shield, which comprises a first light adjusting device with adjustable reflectivity, wherein the first light adjusting device comprises a first absorption type polaroid, a reflection type polaroid and a first liquid crystal modulation device which is clamped between the first absorption type polaroid and the reflection type polaroid and is used for modulating the polarization state of incident light in response to voltage stimulus applied to the first liquid crystal modulation device. The sun shield in the utility model can maintain the function of the reflecting mirror while providing sun shield state switching.

Inventors

• LI GUOWEN
• YAN WENLONG
• QIAN YUCHEN

Assignees

• 苏州萃为智能科技有限公司

Dates

Publication Date

20260508

Application Date

20250509

Claims (20)

1. 1. The first dimming device comprises a first absorption type polaroid, a reflection type polaroid and a first liquid crystal modulation device which is clamped between the first absorption type polaroid and the reflection type polaroid, and the first liquid crystal modulation device is used for responding to voltage stimulus applied to the first liquid crystal modulation device and modulating the polarization state of incident light.
2. 2. The visor of claim 1, wherein light transmission axes of the first absorptive polarizer and the reflective polarizer are parallel or perpendicular to each other.
3. 3. The visor of claim 1 wherein the first liquid crystal modulation device is a TN type liquid crystal modulation device or a VA type liquid crystal modulation device.
4. 4. The visor of claim 1 wherein the first dimmer device is in a state having a highest or lowest reflectivity when a first voltage is applied.
5. 5. The visor of claim 1 wherein the first dimmer device is in a state having a lowest or highest reflectivity when no voltage is applied.
6. 6. The visor of claim 4 or 5 wherein the first dimming means is in a state having a reflectance between a highest reflectance and a lowest reflectance when a voltage between the first voltage and the non-applied voltage is applied.
7. 7. The visor of claim 4 or 5 wherein the first dimming device has a transmittance between a highest transmittance and a lowest transmittance when a voltage between the first voltage and the no voltage is applied.
8. 8. The sun visor of any one of claims 1 to 7 wherein the first light modulating device is arranged such that when the sun visor is mounted to a vehicle, the first absorptive polarizer or reflective polarizer is adjacent to the vehicle interior when the sun visor is functioning as a sun visor.
9. 9. The visor of claim 1 wherein the first light management device further comprises a second absorptive polarizer disposed on a side of the reflective polarizer remote from the first liquid crystal modulation device.
10. 10. The visor of claim 9 wherein the transmission axis of the second absorptive polarizer is parallel to the transmission axis of the reflective polarizer.
11. 11. The visor of claim 9 wherein the first light modulating means is positioned such that the second absorptive polarizer is adjacent to the exterior of the vehicle when the visor is mounted to the vehicle.
12. 12. The sun visor of claim 1 wherein the sun visor comprises a dimming sun visor region and a dimming mirror region, the first dimming device being located in the dimming mirror region, the dimming sun visor region providing a second dimming device having an adjustable transmittance.
13. 13. The visor of claim 12 wherein the type of second dimming device comprises a liquid crystal dimming device, an electrochromic dimming device or an SPD dimming device.
14. 14. The visor of claim 13 wherein the second dimming means comprises a third absorptive polarizer and a fourth absorptive polarizer, and a second liquid crystal modulation means interposed between the third absorptive polarizer and the fourth absorptive polarizer for modulating a polarization state of incident light in response to a voltage stimulus applied thereto.
15. 15. The visor of claim 14 wherein the second liquid crystal modulation device modulating the polarization state of incident light comprises the second liquid crystal modulation device modulating the polarization direction of incident-ray polarized light.
16. 16. The visor of claim 13 wherein the light transmission axes of the third absorptive polarizer and the fourth absorptive polarizer are parallel or perpendicular to each other.
17. 17. The visor of claim 13 wherein the second liquid crystal modulation device is a TN type liquid crystal modulation device or a VA type liquid crystal modulation device.
18. 18. The visor of claim 1 wherein the first liquid crystal modulation device modulating the polarization state of incident light comprises the first liquid crystal modulation device modulating the polarization direction of incident-ray polarized light.
19. 19. The visor of claim 1 further comprising a reflective effect enhancing assembly for enhancing the visual effect of the first light modulating device on reflection of incident light when the first condition is met.
20. 20. The visor of claim 19 wherein the reflection enhancing assembly comprises a transmission blocking assembly.

Description

Sun shield and vehicle using same Technical Field The utility model relates to the technical field of photoelectricity, in particular to a sun shield and a vehicle using the sun shield. Background Sunshades are important components in vehicles. Traditional sunshades need to be manually turned over to switch between sunshade and non-sunshade, and the manual turning operation is not only troublesome, but also affects the driving safety of a driver. Therefore, the proposal of realizing the electric control sunshading board by means of the dimming glass is provided in the prior art, and the light transmittance of the electric control sunshading board can be automatically switched according to the light intensity of the external environment, thereby avoiding manual operation. However, conventional sunshades have an important function, namely, the mirror function provided by the internally integrated vanity mirror, while current electrically controlled sunshades do not retain the mirror function. Inconvenience is brought to users. Disclosure of utility model In order to solve the problems, the utility model provides the sun shield, which keeps the function of the reflecting mirror and improves the convenience of use while realizing electric control sun shield. To achieve the above object, in one aspect, the present application provides a sun visor including a first dimming device having an adjustable reflectance, the first dimming device including a first absorptive polarizer and a reflective polarizer, and a first liquid crystal modulation device interposed between the first absorptive polarizer and the reflective polarizer, the first liquid crystal modulation device for modulating a polarization state of incident light in response to a voltage stimulus applied thereto. In a preferred embodiment, the light transmission axes of the first absorptive polarizer and the reflective polarizer are parallel or perpendicular to each other. In a preferred embodiment, the first liquid crystal modulation device is a TN-type liquid crystal modulation device or a VA-type liquid crystal modulation device. In a preferred embodiment, the first dimming device is in a state having the highest or lowest reflectivity when the first voltage is applied. In a preferred embodiment, the first light modulation device is in a state having the lowest or highest reflectivity when no voltage is applied. In a preferred embodiment, the first dimming device is in a state having a reflectance between a highest reflectance and a lowest reflectance when a voltage between the first voltage and the non-applied voltage is applied. In a preferred embodiment, the first dimming device has a transmittance between the highest transmittance and the lowest transmittance when a voltage between the first voltage and the non-applied voltage is applied. In a preferred embodiment, the first light adjusting means is arranged such that the first absorptive polarizer or reflective polarizer is adjacent to the interior of the vehicle when the sun visor is mounted to the vehicle. In a preferred embodiment, the first dimming device further includes a second absorptive polarizer disposed on a side of the reflective polarizer remote from the first liquid crystal modulation device. In a preferred embodiment, the transmission axis of the second absorptive polarizer is parallel to the transmission axis of the reflective polarizer. In a preferred embodiment, the first dimming means is arranged such that the second absorptive polarizer is close to the outside of the vehicle when the sun visor is installed to the vehicle. In a preferred embodiment, the sun visor comprises a dimming sun visor region and a dimming mirror region, the first dimming device is located in the dimming mirror region, and the dimming sun visor region is provided with a second dimming device with adjustable transmissivity. In a preferred embodiment, the type of second dimming device comprises a liquid crystal dimming device, an electrochromic dimming device or an SPD dimming device. In a preferred embodiment, the second dimming device includes a third absorptive polarizer and a fourth absorptive polarizer, and a second liquid crystal modulation device interposed between the third absorptive polarizer and the fourth absorptive polarizer, the second liquid crystal modulation device being for modulating a polarization state of incident light in response to a voltage stimulus applied thereto. In a preferred embodiment, the second liquid crystal modulation device modulating the polarization state of incident light comprises modulating the polarization direction of incident ray polarized light by the second liquid crystal modulation device. In a preferred embodiment, the light transmission axes of the third absorptive polarizer and the fourth absorptive polarizer are parallel or perpendicular to each other. In a preferred embodiment, the second liquid crystal modulation device is a TN type liquid crystal modula