Anti-ghosting reflection device and a display system with the same

• US 9,946,064 B1
• Filed: 01/20/2017
• Issued: 04/17/2018
• Est. Priority Date: 01/20/2017
• Status: Active Grant

• Current Assignee: E-Lead Electronic Co., Ltd.
• Original Assignee: E-Lead Electronic Co., Ltd.
• Inventors: Chen, Stephen
• Primary Examiner(s): Font, Frank
• Application Number:
  US15/411,791
• Time in Patent Office: 452 Days
• Field of Search: 35948907, 349119
• 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 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 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001

Abstract

An anti-ghosting reflection device includes: a reflection sandwich layer with a first surface and a second surface which are used as reflection surfaces; a first half-wave plate disposed on the first surface of the reflection sandwich layer; and a second half-wave plate disposed beneath the second surface. An anti-ghosting display system is capable of solving the problem of low reflection at the Brewster'"'"'s angle, the invisibility of the polarized sunglasses, raindrops-caused image distortion by the use of the reflection sandwich layer disposed in the two half-wave plates in combination with an imaging device which can generate a polarization imaging light P.

Claims

1. An anti-ghosting reflection device, comprising:

a reflection sandwich layer with a first surface and a second surface which are used as reflection surfaces;

a first half-wave plate disposed on the first surface of the reflection sandwich layer; and

a second half-wave plate disposed on the second surface.

2. The anti-ghosting reflection device as claimed in claim 1, wherein the reflection sandwich layer is transparent and has a reflectivity higher than a reflectivity of the first and second half-wave plates.

3. The anti-ghosting reflection device as claimed in claim 1, wherein the reflection sandwich layer is transparent and has a reflectivity lower than a reflectivity of the first and second half-wave plates.

4. The anti-ghosting reflection device as claimed in claim 1 further comprising an interlayer disposed between the reflection sandwich layer and the first half-wave plate.

5. The anti-ghosting reflection device as claimed in claim 1 further comprising an interlayer disposed between the reflection sandwich layer and the second half-wave plate.

6. The anti-ghosting reflection device as claimed in claim 1, wherein the anti-ghosting reflection device is disposed in an interlayer.

7. An anti-ghosting display system, comprising:

an anti-ghosting reflection device which comprises;

a reflection sandwich layer with a first surface and a second surface which are used as reflection surfaces;

a first half-wave plate disposed on the first surface of the reflection sandwich layer;

a second half-wave plate disposed on the second surface;

wherein the anti-ghosting reflection device is disposed between a first glass and a second glass, the first glass and the second glass are a windshield of a vehicle; and

an imaging device produces a polarization imaging light P to pass through the second half-wave plate, the second surface of the reflection sandwich layer, the first surface of the reflection sandwich layer and the first half-wave plate, a juncture of the second half-wave plate and the second surface of the reflection sandwich layer serves to convert the polarization imaging light P into a polarization imaging light S, a reflection of the polarization imaging light S by the second surface is a polarization imaging light S1, a juncture of the second half-wave plate and the second glass serves to convert the polarization imaging light S1 into a polarization imaging light P1, the polarization imaging light P1 serves to pass through the second glass and toward the direction of a user'"'"'s eyes, a reflection of the polarization imaging light S by the first surface of the reflection sandwich layer is a polarization imaging light S2, the juncture of the second half-wave plate and the second glass serves to convert the polarization imaging light S2 into a polarization imaging light P2, and the polarization imaging light P2 serves to pass through the second glass and toward the direction of the user'"'"'s eyes.

8. The anti-ghosting display system as claimed in claim 7 further comprising an interlayer disposed between the reflection sandwich layer and the first half-wave plate.

9. The anti-ghosting display system as claimed in claim 7 further comprising an interlayer disposed between the reflection sandwich layer and the second half-wave plate.

10. The anti-ghosting display system as claimed in claim 7, wherein the anti-ghosting reflection device is disposed in an interlayer.