DRAWING DEVICE OF MOVE-TARGET IMAGE AND DISPLAY SYSTEM FOR VEHICLE

• US 20110235943A1
• Filed: 12/08/2009
• Published: 09/29/2011
• Est. Priority Date: 12/08/2008
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Iwazaki, Katsuhiko, Ogasawara, Kazuyoshi
• Granted Patent: US 8,830,260 B2
• Time in Patent Office: Days
• US Class Current: 382/275
• CPC Class Codes: G01D 11/28 Structurally-combined illuminating devices
• CPC Class Codes: G01D 7/00 Indicating measured values
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

Afterimages of a move-target image which is moved at high speed are reduced even if a display unit with slow response characteristics is used. A drawing device for continuously drawing a move-target image as a moving picture on a display image displayed on a display unit includes: a drawing position identification unit which identifies a current drawing position at which the move-target image is drawn on the display screen; a past drawing position storage unit in which is stored a prescribed number of past drawing positions where the move-target image is drawn previously; an afterimage-reducing region detection unit which detects an afterimage-reducing region of the move-target image, the afterimage reducing region extending from the current drawing position to any one of the past drawing positions; an afterimage-reducing image drawing unit which draws an afterimage-reducing image in the afterimage reducing region; and a move-target image drawing unit which draws the move-target image at the current drawing position.

Claims

1. A drawing device for continuously drawing a move-target image as a moving picture on a display image displayed on a display unit, the drawing device comprising:

a drawing position identification unit which is configured to identify a current drawing position at which the move-target image is drawn on the display screen;

a past drawing position storage unit in which is stored a prescribed number of past drawing positions where the move-target image is drawn previously;

an afterimage-reducing region detection unit which is configured to detect an afterimage-reducing region of the move-target image, the afterimage reducing region extending from the current drawing position to any one of the past drawing positions;

an afterimage-reducing image drawing unit which is configured to draw an afterimage-reducing image in the afterimage reducing region; and

a move-target image drawing unit which is configured to draw the move-target image at the current drawing position.

2. The drawing device according to claim 1, comprising:

a previous move-target image erasing unit which is configured to erase a previous move-target image in accordance with an identification of the current drawing position performed by the drawing position identification unit.

3. The drawing device according to claim 1, comprising:

an afterimage-reducing region dividing unit which is configured to divide the afterimage-reducing region into a plurality of afterimage-reducing divided regions on the basis of the plurality of stored past drawing positions, wherein

the afterimage-reducing image drawing unit draws each of divided afterimage-reducing images to be drawn in the plurality of afterimage-reducing divided regions so that its gradation is reduced step-by-step as it gets away from the move-target image.

4. The drawing device according to claim 3, wherein

the move-target image is an image which indicates a display of rotating a pointer, and

the afterimage-reducing image drawing unit draws each of divided afterimage-reducing images to be drawn in the plurality of afterimage-reducing divided regions so that its gradation is reduced gradually as it comes close to a rotational center of the pointer.

5. A display system for a vehicle comprising the drawing device according to claim 1.