TRANSMISSION TYPE SCREEN AND HEAD-UP DISPLAY DEVICE USING SAME

• US 20180052322A1
• Filed: 02/24/2016
• Published: 02/22/2018
• Est. Priority Date: 02/26/2015
• Status: Active Application

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: KUBOTA, Shogo
• Application Number:
  US15/552,620
• Publication Number:
  US 20180052322A1
• Time in Patent Office: Days
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/48 Laser speckle optics
• CPC Class Codes: G02B 3/00 Simple or compound lenses
• CPC Class Codes: G02B 3/0056 arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085
• CPC Class Codes: G02B 5/02 Diffusing elements; Afocal elements
• CPC Class Codes: G02B 5/0221 the surface having an irregular structure G02B5/0226 takes precedence
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G03B 21/10 Projectors with built-in or built-on screen
• CPC Class Codes: G03B 21/60 characterised by the nature of the surface
• CPC Class Codes: G03B 21/625 Lenticular translucent screens

Abstract

In order to provide a transmission type screen capable of maintain sharpness of image without impairing uniformity of emergent light to be emitted therefrom, a transmission type screen 40 of the present invention includes a microlens array substrate 50 having a first surface 51 equipped with a microlens array 54 including a plurality of microlenses; and a light diffusion substrate 60 having a second surface 61 equipped with a light diffusion surface; wherein the first surface 51 of the microlens array substrate 50, which is equipped with the microlens array, and the second surface 61 of the light diffusion substrate 60, which is equipped with the light diffusion surface, are opposedly arranged.

Claims

1. A transmission type screen comprising:

a microlens array substrate having a first surface equipped with a microlens array including a plurality of microlenses; and

a light diffusion substrate having a second surface equipped with a light diffusion surface;

wherein the first surface of the microlens array substrate, which is equipped with the microlens array, and the second surface of the light diffusion substrate, which is equipped with the light diffusion surface, are opposedly arranged.

2. The transmission type screen according to claim 1, wherein

an opposed interval between the microlens array substrate and the light diffusion substrate is not less than 0 μ

m and not more than 100 μ

m.

3. The transmission type screen according to claim 1, wherein

the microlens array is disposed in a first direction and a second direction crossing the first direction, and

a diffusion angle of the microlens array substrate in the first direction and a diffusion angle of the microlens array substrate in the second direction differ.

4. The transmission type screen according to claim 1, wherein

a diffusion angle of the light diffusion substrate is not less than 5°

and not more than 6°

.

5. The transmission type screen according to claim 1, wherein

the light diffusion surface has micro-irregularities.

6. The transmission type screen according to claim 5, wherein

a cycle of the micro-irregularities is random.

7. A head-up display device comprising the transmission type screen according to claim 1.

8. The head-up display device according to claim 7, comprising:

a laser light source configured to emit laser light; and

a scanner configured to allow the laser light to scan on the transmission type screen.

9. The head-up display device according to claim 7, comprising:

a light source configured to emit light; and

an LCOS element configured to reflect the light onto the transmission type screen.

10. The head-up display device according to claim 7, comprising:

a light source configured to emit light; and

a DMD element configured to reflect the light onto the transmission type screen.