Display device and display method of the same

• US 10,564,416 B2
• Filed: 06/08/2017
• Issued: 02/18/2020
• Est. Priority Date: 06/09/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Harada, Tsutomu, Sako, Kazuhiko
• Primary Examiner(s): Wilkes, Zachary W
• Application Number:
  US15/617,468
• Publication Number:
  US 20170359558A1
• Time in Patent Office: 985 Days
• Field of Search: 359630
• CPC Class Codes: B60K 2360/23 using reflectors
• CPC Class Codes: B60K 2360/29 Holographic features
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/213 Virtual instruments
• CPC Class Codes: B60K 35/23 Head-up displays [HUD] optical aspects of head-up displays G02B27/01
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: B60R 2300/205 using a head-up display
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 2027/0116 comprising devices for correcting chromatic aberration
• CPC Class Codes: G02B 2027/0127 comprising devices increasing the depth of field
• CPC Class Codes: G02B 2027/0181 Adaptation to the pilot/driver
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 5/04 Prisms
• CPC Class Codes: G03B 21/147 Optical correction of image distortions, e.g. keystone
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• CPC Class Codes: H04N 9/3108 by using a single electronic spatial light modulator
• CPC Class Codes: H04N 9/3138 using arrays of modulated light sources electroluminescent display devices G09G3/30
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20
• CPC Class Codes: H04N 9/3182 : Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607

Abstract

According to one embodiment, when displaying an image on a display panel, projecting an image which is displayed on the display panel, inclining the image which is projected from the display panel at a predetermined angle of bend, and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface, a display device corrects input picture image of the prism based on characteristics contrary to the chromatic aberration characteristics of the prism.

Claims

1. A display device comprising:

an image processor which generates, corrects, and outputs an image;

a display panel which displays the image which is output from the image processor;

a backlight source which projects the image which is displayed on the display panel;

a prism which is arranged so that a plane of incidence inclines at a first predetermined angle with respect to the display panel, inclines the image which is projected from the display panel, and outputs the image at a second predetermined angle; and

a group of mirrors which expands and reflects the image which is projected from the display panel via the prism and guides the image to a projection surface, wherein

the image processor divides the image displayed on the display panel into images for primary color components, respectively, and performs a process for stretching each of the images for the primary color components in accordance with the angle at which the plane of incidence of the prism inclines with respect to the display panel and a wavelength of the primary color component, and

a stretch rate of each of the primary color components is set to have characteristics contrary to chromatic aberration characteristics of the prism such that the shorter the wavelength of an image of a primary color component the larger the image.

2. The display device of claim 1, wherein the backlight source irradiates the display panel from behind at a third predetermined angle.

3. The display device of claim 1, wherein

the prism inclines one part of the image which is projected from the display panel at the second predetermined angle, and

the group of mirrors guides both the one part of the image which is projected via the prism and the other part of the image which is projected without being transmitted through the prism to the projection surface.

4. The display device of claim 3, wherein

the image processor arranges as the image to which is to be displayed on the display panel, an image to be obliquely displayed on the display panel, relative to the display panel, in an area where the image is projected via the prism, and arranges as the image which is to be displayed on the display panel, an image to be vertically displayed on the display panel in an area where the image is projected without being transmitted through the prism.

5. The display device of claim 1, further comprising another prism in addition to the prism, wherein the second predetermined angle is increased by use of the prism and the other prism in combination.

6. The display device of claim 1, wherein the prism includes a plurality of small prisms formed into a plate.

7. A method of displaying an image comprising:

displaying an image on a display panel,

projecting the image which is displayed on the display panel,

inclining the image which is projected from the display panel at a first predetermined angle with a prism which is arranged so that a plane of incidence inclines at a second predetermined angle with respect to the display panel, and

expanding and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface,

dividing the image displayed on the display panel into images for primary color components, respectively, and

performing a process for stretching each of the images for the primary color components in accordance with the angle at which the plane of incidence of the prism inclines with respect to the display panel and a wavelength of the primary color component, wherein

a stretch rate of each of the primary color components is set to have characteristics contrary to chromatic aberration characteristics of the prism such that the shorter the wavelength of an image of a primary color component the larger the image.