Beam splitting module and projector device using the same

• US 9,360,667 B2
• Filed: 04/24/2014
• Issued: 06/07/2016
• Est. Priority Date: 10/21/2013
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chou, Ming-Chieh, Chen, Yi-Cheng, Lee, Yao-Hui, Su, Han-Wei
• Primary Examiner(s): Chowdhury, Sultan
• Application Number:
  US14/260,944
• Publication Number:
  US 20150108782A1
• Time in Patent Office: 775 Days
• Field of Search: 353/20, 353/99, 353/119
• US Class Current: 1/1
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G03B 21/2066 Reflectors in illumination beam in projection beam G03B21/28
• CPC Class Codes: G03B 21/208 Homogenising, shaping of the illumination light
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066

Abstract

A beam splitting module and a projector device using the same are provided. The beam splitting module comprises a projector, a first reflective mirror and a second reflective mirror. The projector projects a first split image, a second split image and a third split image. The first reflective mirror reflects the first split image to a real image forming plate to form a first projection image. The second reflective mirror reflects the second split image to the real image forming plate to form a second projection image. The third split image is projected on the real image forming plate through a space between the first reflective mirror and the second reflective mirror to form a third projection image.

Claims

1. A beam splitting module, comprising:

a projector for projecting a first split image, a second split image and a third split image;

a first reflective mirror for reflecting the first split image to form a first projection image;

a second reflective mirror for reflecting the second split image to form a second projection image;

wherein, the third split image is projected through a space between the first reflective mirror and the second reflective mirror to form a third projection image;

wherein the first split image, the second split image and the third split image are arranged along a first direction, and the first projection image, the second projection image and the third projection image are arranged along a second direction different from the first direction.

2. The beam splitting module according to claim 1, wherein the first direction is perpendicular to the second direction.

3. The beam splitting module according to claim 1, wherein the first direction is a vertical direction, and the second direction is a horizontal direction.

4. The beam splitting module according to claim 1, further comprising:

a real image forming plate, wherein the first projection image, the second projection image and the third projection image are projected on the real image forming plate to form a first real image, a second real image and a third real image respectively.

5. The beam splitting module according to claim 4, wherein the quantity of the real image forming plate is single.

6. The beam splitting module according to claim 1, wherein the first reflective mirror comprises a first sub-reflective mirror and a second sub-reflective mirror, a reflective surface of the first sub-reflective mirror faces towards the second sub-reflective mirror but faces away from a real image forming plate, a reflective surface of the second sub-reflective mirror faces towards the real image forming plate, and the first split image is sequentially reflected by the first sub-reflective mirror and the second sub-reflective mirror so as to be projected on the real image forming plate.

7. The beam splitting module according to claim 1, wherein the second reflective mirror comprises a third sub-reflective mirror and a fourth sub-reflective mirror, a reflective surface of the third sub-reflective mirror faces towards the fourth sub-reflective mirror but faces away from a real image forming plate, a reflective surface of the fourth sub-reflective mirror faces towards the real image forming plate, and the second split image is sequentially reflected by the third sub-reflective mirror and the third sub-reflective mirror so as to be projected on the real image forming plate.

8. The beam splitting module according to claim 1, further comprising:

a lens disposed between the first reflective mirror and the second reflective mirror for adjusting a size of the third split image.

9. The beam splitting module according to claim 1, wherein the first reflective mirror and the second reflective mirror are interconnected to form a one-piece type reflective mirror, and the one-piece type reflective mirror has the space.

10. The beam splitting module according to claim 1, wherein the first reflective mirror comprises a first sub-reflective mirror and a second sub-reflective mirror, the second sub-reflective mirror comprises a third sub-reflective mirror and a fourth sub-reflective mirror, the first sub-reflective mirror and the third sub-reflective mirror are interconnected to form a one-piece type reflective mirror, and the second sub-reflective mirror and the fourth sub-reflective mirror are interconnected to form another one-piece type reflective mirror.

11. The beam splitting module according to claim 1, wherein the projector further projects a fourth split image and a fifth split image, and the fourth split image and the fifth split image are projected through the space to form a fourth projection image and a fifth projection image respectively.

12. The beam splitting module according to claim 1, wherein the projector further projects a fourth split image and a fifth split image, and the beam splitting module further comprises:

a fourth reflective mirror for reflecting the fourth split image to form a fourth projection image; and

a fifth reflective mirror for reflecting the fifth split image to form a fifth projection image.

13. A projector device, comprising:

the beam splitting module according to claim 1; and

a real image forming plate, wherein the first projection image, the second projection image and the third projection image form a first real image, a second real image and a third real image respectively through the real image forming plate.

14. The projector device according to claim 13, further comprising:

a virtual image forming plate, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

15. The projector device according to claim 13, wherein a virtual image forming plate is disposed on windshield, instrument panel, sun visor, rearview mirror or the beam splitting module, and the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

16. The projector device according to claim 14, wherein the virtual image forming plate is a one-piece type concave semi-reflective mirror.

17. The projector device according to claim 14, wherein the virtual image forming plate comprises:

a virtual image forming lens, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate; and

a semi-reflective mirror is separated from the virtual image forming lens, wherein the first virtual image, the second virtual image and the third virtual image are projected on a far position through the semi-reflective mirror.

18. A windscreen disposed in front of the projector device according to claim 13, comprising:

a windscreen body; and

a virtual image forming plate adhered in a windshield body, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

19. A windscreen disposed in front of the projector device according to claim 13, comprising:

a windscreen body; and

a concave profile integrated into the windscreen body, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the concave profile.

20. A beam splitting module, comprising:

a projector for projecting a first split image, a second split image and a third split image;

a first reflective mirror for reflecting the first split image to form a first projection image;

a second reflective mirror for reflecting the second split image to form a second projection image;

a third reflective mirror located between the first reflective mirror and the second reflective mirror for reflecting the third split image to form a third projection image;

wherein the first split image, the second split image and the third split image are arranged along a first direction, and the first projection image, the second projection image and the third projection image are arranged along a second direction different from the first direction.

21. The beam splitting module according to claim 20, wherein the first direction is perpendicular to the second direction.

22. The beam splitting module according to claim 20, wherein the first direction is a vertical direction, and the second direction is a horizontal direction.

23. The beam splitting module according to claim 20, wherein the first reflective mirror comprises a first sub-reflective mirror and a second sub-reflective mirror, a reflective surface of the first sub-reflective mirror faces towards the second sub-reflective mirror and a real image forming plate, a reflective surface of the second sub-reflective mirror faces towards the real image forming plate, and the first split image is sequentially reflected by the first sub-reflective mirror and the second sub-reflective mirror so as to be projected on the real image forming plate.

24. The beam splitting module according to claim 20, wherein the second reflective mirror comprises a third sub-reflective mirror and a fourth sub-reflective mirror, a reflective surface of the third sub-reflective mirror faces towards the fourth sub-reflective mirror and a real image forming plate, a reflective surface of the fourth sub-reflective mirror faces towards the real image forming plate, and the second split image is sequentially reflected by the third sub-reflective mirror and the fourth sub-reflective mirror so as to be projected on the real image forming plate.

25. The beam splitting module according to claim 20, further comprising:

a real image forming plate, wherein the first projection image, the second projection image and the third projection image are projected on the real image forming plate to form a first real image, a second real image and a third real image respectively.

26. The beam splitting module according to claim 25, wherein the quantity of the real image forming plate is single.

27. The beam splitting module according to claim 25, wherein the real image forming plate has a concave surface on which the first projection image, the second projection image and the third projection image are projected.

28. The beam splitting module according to claim 20, further comprising:

an image correction unit for correcting at least one of the first projection image, the second projection image and the third projection image.

29. A projector device, comprising:

the beam splitting module according to claim 20; and

a real image forming plate, wherein the first projection image, the second projection image and the third projection image form a first real image, a second real image and a third real image respectively through the real image forming plate.

30. The projector device according to claim 29, further comprising:

a virtual image forming plate, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

31. The projector device according to claim 29, wherein a virtual image forming plate is disposed on windshield, instrument panel, sun visor, rearview mirror or the beam splitting module, and the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

32. The projector device according to claim 30, wherein the virtual image forming plate is a one-piece type concave semi-reflective mirror.

33. The projector device according to claim 30, wherein the virtual image forming plate comprises:

a virtual image forming lens, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate; and

a semi-reflective mirror is separated from the virtual image forming lens, wherein the first virtual image, the second virtual image and the third virtual image are projected on a far position through the semi-reflective mirror.

34. A windscreen disposed in front of the projector device according to claim 29, comprising:

a windscreen body; and

a virtual image forming plate adhered in a windshield body, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the virtual image forming plate.

35. A windscreen disposed in front of the projector device according to claim 29, comprising:

a windscreen body; and

a concave profile integrated into the windscreen body, wherein the first real image, the second real image and the third real image form a first virtual image, a second virtual image and a third virtual image respectively through the concave profile.