Granted Patent B2

US 12,270,993 · App. 17/429,688 · Granted Apr 8, 2025

Inventors: Koji Hirata (Kyoto, JP); Koji Fujita (Kyoto, JP)

Assignee: MAXELL, LTD.

G02B27/0101B60K35/23G02B2027/0118

Abstract

Claims (29)

1. A vehicle information display apparatus for using a part of a shield glass of a vehicle as a display region to display information on an inside of the vehicle, the vehicle information display apparatus comprising:

a video display apparatus provided inside the vehicle, the video display apparatus being configured to project video light of the information;

a transparent sheet provided on an inner surface of the display region set to the part of the shield glass; and

a light direction converting panel configured to convert a direction of the video light from the video display apparatus toward the transparent sheet,

wherein the transparent sheet includes a phase difference plate, an absorption type polarizing plate configured to absorb a specific polarized wave, and a transparent sheet member having a light diffusion effect in order from a side of the shield glass toward the video display apparatus, and

wherein the information by the video light whose direction is converted by the light direction converting panel is displayed to the inside of the vehicle.

2. The vehicle information display apparatus according to claim 1 , further comprising:

a protective cover provided on one surface of the light direction converting panel, the protective cover being configured to reduce surface reflection of outside light.

3. The vehicle information display apparatus according to claim 1 ,

wherein the transparent sheet is configured to display the information to the inside of the vehicle by reflecting the video light.

4. The vehicle information display apparatus according to claim 1 ,

wherein the transparent sheet is configured to display the information to an outside of the vehicle by transmitting the video light.

5. The vehicle information display apparatus according to claim 1 ,

wherein the light direction converting panel is formed by a linear Fresnel lens.

6. The vehicle information display apparatus according to claim 2 ,

wherein the protective cover has a membrane or film configured to absorb or reflect polarized wave components from an outside of the vehicle.

7. An information display system for vehicle for using a part of a shield glass of a vehicle to display information,

wherein at least one of the vehicle information display apparatuses respectively described in claim 1 is provided in the vehicle, and

wherein the part of the shield glass of the vehicle is used as a display region, and video light from the vehicle information display apparatus is projected toward the transparent sheet provided on the inner surface of the display region that is provided at the part of the shield glass of the vehicle.

8. The information display system for vehicle according to claim 7 ,

wherein the shield glass is a windshield.

9. The information display system for vehicle according to claim 8 ,

wherein on the windshield, a plurality of vehicle information display apparatuses is used to display information of the video light to an inside and an outside of the vehicle.

10. The information display system for vehicle according to claim 8 ,

wherein a head up display apparatus is mounted in the information display system for vehicle.

11. The information display system for vehicle according to claim 7 ,

wherein the shield glass is a rear window glass or a side window glass.

12. The information display system for vehicle according to claim 11 ,

wherein on the rear window glass or the side window glass, at least one of the vehicle information display apparatuses is used to display information of the video light to an outside of the vehicle.

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (42)