DUST COVER ASSEMBLY AND HEAD-UP DISPLAY DEVICE INCLUDING THE SAME

• US 20160109702A1
• Filed: 06/05/2015
• Published: 04/21/2016
• Est. Priority Date: 10/15/2014
• Status: Abandoned Application

• Current Assignee: Hyundai Mobis Co., Ltd.
• Original Assignee: Hyundai Mobis Co., Ltd.
• Inventors: SONG, Ki Hyuk
• Application Number:
  US14/732,456
• Publication Number:
  US 20160109702A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/0006 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation G02B1/18 takes precedence; cleaning in general B08B
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• 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

A head-up display device includes: a dust cover assembly; a picture generating unit configured to generate an optical signal corresponding to an image; a mirror unit configured to receive the optical signal from the picture generating unit and reflect the optical signal to the dust cover assembly; and a windshield configured to convert the optical signal having a polarization direction adjusted by the dust cover assembly into a virtual image.

Claims

1. A dust cover assembly comprising:

a dust cover configured to transmit an optical signal; and

a phase delay film overlapping the dust cover and configured to adjust a polarization direction by delaying a phase of the optical signal incident from the dust cover so as to transmit the optical signal having the adjusted polarization direction.

2. The dust cover assembly of claim 1, wherein the polarization direction of the optical signal is adjusted by an anisotropic crystal structure having a phase delay value of the phase delay film.

3. The dust cover assembly of claim 2, wherein the phase delay value is determined by tensioning, coating, and polymerizing the phase delay film.

4. The dust cover assembly of claim 3, wherein the phase delay value is set based on a center wavelength in a visible light region of the optical signal.

5. The dust cover assembly of claim 2, wherein the phase delay film is made of polycarbonate (PC) or polymethyl methacrylate (PMMA).

6. The dust cover assembly of claim 2, wherein a polarization direction of the optical signal is adjusted to be polarized at 180°

.

7. The dust cover assembly of claim 1, wherein the dust cover is made of PC which blocks foreign substances such as dust and transmits the optical signal.

8. A head-up display device comprising:

the dust cover assembly according to claim 1;

a picture generating unit configured to generate an optical signal corresponding to an image;

a mirror unit configured to receive the optical signal from the picture generating unit and reflect the optical signal to the dust cover assembly; and

a windshield configured to convert the optical signal having a polarization direction adjusted by the dust cover assembly into a virtual image.

9. The head-up display device of claim 8, wherein the picture generating unit is an LCD type or a DLP scanning type.