Vehicle display system absorbing ambient light

• US 10,324,288 B2
• Filed: 11/15/2017
• Issued: 06/18/2019
• Est. Priority Date: 11/21/2016
• Status: Active Grant

• Current Assignee: Mega1 Company Limited
• Original Assignee: Mega1 Company Limited
• Inventors: Lin, Wei-Chih
• Primary Examiner(s): Le, Bao-Luan Q
• Application Number:
  US15/813,261
• Publication Number:
  US 20180143351A1
• Time in Patent Office: 580 Days
• CPC Class Codes: B60K 2360/23 using reflectors
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/23 Head-up displays [HUD] optical aspects of head-up displays G02B27/01
• CPC Class Codes: B60R 2300/205 using a head-up display
• CPC Class Codes: G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements G02B1/08 takes precedence
• CPC Class Codes: G02B 1/11 Anti-reflection coatings
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 2027/0121 Parasitic image effect attenuation by suitable positioning of the parasitic images
• CPC Class Codes: G02B 2027/0154 with movable elements
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0179 Display position adjusting means not related to the information to be displayed
• CPC Class Codes: G02B 5/20 Filters polarising elements G02B5/30

Abstract

An anti-glare head-up display system for vehicles includes a projection imaging unit and a curved mirror. The projection imaging unit is in an upper region of a cabin of the vehicle. The curved mirror is on a top surface of an instrument panel of the vehicle. The curved mirror includes a doped glass, a high-reflection coating and a dark coating. The doped glass and the dark coating absorb visible light. The high-reflection coating is on a surface of the doped glass facing the projection imaging unit and has a high-reflection effect at wavelengths corresponding to light sources used by the projection imaging unit. The dark coating is on another surface of the doped glass opposite with the projection imaging unit. Light rays emitted by the projection imaging unit are projected onto the curved mirror, and light rays reflected from the curved mirror are projected onto the windshield to form a virtual image in front of the windshield. Light rays of ambient light projected onto the curved mirror which do not belong to the wavelengths corresponding to the light sources pass through the high-reflection coating and are absorbed by the doped glass and the dark coating.

Claims

1. An anti-glare head-up display system for a vehicle, with the vehicle comprising a cabin, an instrument panel in a front of the cabin, and a windshield above the instrument panel, with the anti-glare head-up display system comprising:

a projection imaging unit disposed in a top side of the cabin, wherein light sources used by the projection imaging unit comprises red light sources, green light sources, and blue light sources; and

a curved mirror disposed on a top surface of the instrument panel, with the curved mirror comprising;

a doped glass absorbing visible light, wherein the doped glass comprises a color of brown, grey, or black;

a high-reflection coating arranged on a surface of the doped glass facing the projection imaging unit, wherein the high-reflection coating has a high-reflection effect at wavelengths of red light, green light, and blue light of the red, green and blue light sources used by the projection imaging unit; and

a dark coating arranged on another surface of the doped glass opposite with the projection imaging unit, with the dark coating absorbing visible light;

wherein the red, green and blue light emitted by the projection imaging unit is projected onto the curved mirror, is reflected from the curved mirror, and is projected onto the windshield to form a virtual image in front of the windshield; and

wherein light rays of ambient light projected onto the curved mirror which do not belong to the wavelengths corresponding to the red, green and blue light pass through the high-reflection coating and are absorbed by the doped glass and the dark coating.

2. The anti-glare head-up display system of claim 1, further comprising:

an adjustment mechanism disposed on the top surface of the instrument panel, wherein the adjustment mechanism adjusts the curved mirror to a forward-backward position and an inclined angle relative to at least one direction.

3. The anti-glare head-up display system of claim 1, wherein the projection imaging unit is disposed on a top region of the windshield.

4. The anti-glare head-up display system of claim 3, wherein the projection imaging unit is disposed on the top region and includes 10% of an area of the windshield.

5. The anti-glare head-up display system of claim 1, wherein the projection imaging unit is disposed on a front region of the internal roof of the vehicle.

6. The anti-glare head-up display system of claim 5, wherein the projection imaging unit is disposed on a sun visor or is disposed on a front region of a review mirror.

7. The anti-glare head-up display system of claim 1, wherein the dark coating comprises a color of brown, grey, or black.