HEAD-UP DISPLAY AND VEHICLE EQUIPPED WITH HEAD-UP DISPLAY

• US 20170092169A1
• Filed: 09/26/2016
• Published: 03/30/2017
• Est. Priority Date: 09/29/2015
• Status: Active Grant

• Current Assignee: Panasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: KUZUHARA, Satoshi, OKAYAMA, Hiroaki
• Granted Patent: US 9,928,769 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 2027/0116 comprising devices for correcting chromatic aberration
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 2380/10 Automotive applications
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels

Abstract

A head-up display includes a display device, a CPU, and a projection optical system. The display device has pixels including a first-color subordinate pixel and a second-color subordinate pixel, and displays an image. The CPU controls display of the display device. The projection optical system has a refractive optical system, and projects the image displayed on display device on a viewpoint region of an observer. The CPU asymmetrically shifts, between the reference outer side image end and the reference inner side image end with reference to a center, a pixel of an image formed by the second-color subordinate pixel relative to an image formed by the first-color subordinate pixel.

Claims

1. A head-up display mounted on a vehicle having a windshield for projecting an image on the windshield to allow an observer to visually recognize a virtual image, the head-up display comprising:

a display device that has pixels including a first-color subordinate pixel and a second-color subordinate pixel and displays an image;

a processor that controls display of the display device; and

a projection optical system that has a refractive optical system, and projects the image displayed on the display device on a viewpoint region of an observer,

wherein in relation to a deflection angle between a vector of a beam input to the refractive optical system and a vector of a beam output from the refractive optical system, the deflection angle of a beam at a reference outer side image end passing through an outer side in the refractive optical system with reference to the vehicle and the deflection angle of a beam at a reference inner side image end passing through an inner side in the refractive optical system with reference to the vehicle differ from each other, and

the processor asymmetrically shifts, between the reference outer side image end and the reference inner side image end with reference to a center, a pixel of an image formed by the second-color subordinate pixel relative to an image formed by the first-color subordinate pixel.

2. The head-up display according to claim 1 satisfying a condition (1):

1.2<

(θ

2i×

θ

1o)/(θ

2o×

θ

1i)<

6.0 

 

(1)

where

θ

1i is an angle between a vector of a reference inner side beam that is input to the windshield and a vector of the reference inner side beam reflected from the windshield;

θ

1o is an angle between a vector of a reference outer side beam that is input to the windshield and a vector of the reference outer side beam reflected from the windshield;

θ

2i is an angle between a vector of a reference inner side beam that is input to a refractive optical system and a vector of the reference inner side beam output from the refractive optical system; and

θ

2o is an angle between a vector of a reference outer side beam that is input to the refractive optical system and the reference outer side beam that is output from the refractive optical system.

3. The head-up display according to claim 1, wherein

the first-color is green-color;

the second-color is blue-color; and

the head-up display satisfies a condition (2);

1.5≦

(Mi×

θ

1o)/(Mo×

θ

1i) 

 

(2)

where

Mi is a shift-distance of the second-color pixel with reference to the first-color pixel at a reference inner side image being an end of an image reaching an inner side of a virtual image; and

Mo is a shift-distance of the second-color pixel with reference to the first-color pixel at a reference outer side image being an end of an image reaching an outer side of a virtual image.

4. The head-up display according to claim 1, wherein

the refractive optical system has a greater curvature in a vehicularly front-rear direction than in a vehicularly right-left direction.

5. The head-up display according to claim 1, wherein

the refractive optical system is arranged eccentrically with respect to a reference beam that passes through a center of the image.

6. The head-up display according to claim 1, wherein

the refractive optical system is eccentric relative to a reference beam that passes through a center of the image.

7. A vehicle comprising the head-up display according to claim 1.