Head-up display module

• US 9,791,695 B2
• Filed: 06/10/2015
• Issued: 10/17/2017
• Est. Priority Date: 06/10/2015
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Ting, Tzu-Yu, Su, Chuan-Tsung, Lian, Jan-Tian
• Primary Examiner(s): CROCKETT, RYAN M
• Application Number:
  US14/735,152
• Publication Number:
  US 20160363764A1
• Time in Patent Office: 860 Days
• Field of Search: None
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/13362 providing polarized light, e.g. by converting a polarisation component into another one

Abstract

A head-up display module is provided. The head-up display module includes a polarized light source, an optical sheet, and a display panel. The polarized light source is capable of emitting a polarized light beam. The optical sheet is disposed on a transmission path of the polarized light beam, and the polarized light beam is reflected by the optical sheet. The display panel is disposed on the transmission path of the polarized light beam between the polarized light source and the optical sheet, and a polarization of the polarized light beam is modulated by the display panel.

Claims

1. A head-up display module, comprising:

a polarized light source capable of emitting a polarized light beam;

an optical sheet disposed on a transmission path of the polarized light beam, wherein the polarized light beam is reflected by the optical sheet, wherein a material of the optical sheet comprises front windshield glass; and

a display panel disposed on the transmission path of the polarized light beam between the polarized light source and the optical sheet, wherein a polarization of the polarized light beam is modulated by the display panel,

wherein the display panel modulates the polarization of the polarized light beam from a first polarization direction to a second polarization direction, the optical sheet reflects the polarized light beam having the second polarization direction and transmits the polarized light beam having the first polarization direction, and the first polarization direction is perpendicular to the second polarization direction, and

wherein the display panel does not have a polarizer.

2. The head-up display module of claim 1, wherein the polarized light source comprises a backlight unit and an analyzer, and the analyzer is disposed between the display panel and the backlight unit.

3. The head-up display module of claim 2, wherein the analyzer is directly disposed on the backlight unit.

4. The head-up display module of claim 2, wherein the analyzer is separated from the backlight unit.

5. The head-up display module of claim 2, wherein the backlight unit comprises a direct-type backlight unit or an edge-type backlight unit.

6. The head-up display module of claim 2, wherein the analyzer comprises a transmissive polarizer, a reflective polarizer film, a dual brightness enhancement film (DBEF), an advanced polarizer film (APF), or a wire grid polarizer (WGP).

7. The head-up display module of claim 1, wherein the polarized light source comprises a polarized LED.

8. The head-up display module of claim 1, wherein the optical sheet is a single layered structure.

9. The head-up display module of claim 1, wherein the optical sheet and the display panel forms an included angle θ

, and the included angle θ

ranges between 30°

to 150°

.

10. A head-up display module, comprising:

a backlight unit capable of emitting a light beam;

an analyzer disposed on a transmission path of the light beam, wherein the light beam is converted to a polarized light beam by the analyzer;

an optical sheet disposed on a transmission path of the polarized light beam, wherein the polarized light beam is reflected by the optical sheet, wherein a material of the optical sheet comprises front windshield glass; and

a display panel disposed on the transmission path of the polarized light beam between the analyzer and the optical sheet, wherein a polarization of the polarized light beam is modulated by the display panel,

wherein the display panel modulates the polarization of the polarized light beam from a first polarization direction to a second polarization direction, the optical sheet reflects the polarized light beam having the second polarization direction and transmits the polarized light beam having the first polarization direction, and the first polarization direction is perpendicular to the second polarization direction, and

wherein the display panel does not have a polarizer.

11. The head-up display module of claim 10, wherein the backlight unit comprises a direct-type backlight unit or an edge-type backlight unit.

12. The head-up display module of claim 10, wherein the analyzer comprises a transmissive polarizer, a reflective polarizer film, a dual brightness enhancement film (DBEF), an advanced polarizer film (APF), or a wire grid polarizer (WGP).

13. The head-up display module of claim 10, wherein the optical sheet is a single layered structure.

14. The head-up display module of claim 10, wherein the optical sheet and the display panel forms an included angle θ

, and the included angle θ

ranges between 30°

to 150°

.