Pointing device and portable information terminal using the same
First Claim
1. A pointing device for moving a pointer shown on a display screen, comprising:
- a transparent plate having an outer surface to contact a surface of an object;
image detecting means for detecting an image of the surface of said object that contacts an outer surface of said plate; and
optical means for forming an image on the outer surface of said plate on a detection plane of said image detecting means, wherein said pointer is configured to be able to move according to a movement of the image on the outer surface of said plate detected by said image detecting means.
6 Assignments
0 Petitions
Accused Products
Abstract
A pointing device is placed in a through hole provided on an outer case of the portable information terminal. The portable information terminal includes a fingerplate attached to a through hole via a hinge 4e; an image pick-up element placed on a circuit board; a condensing lens that forms an image on an outer surface of the fingerplate on an image pick-up plane of the image pick-up element; and a light emitting device that irradiates the outer surface of the fingerplate with illumination light, and takes the image of a pattern such as a fingerprint of a fingertip that touches the outer surface of the fingerplate by using the image pick-up element. When the fingertip moves while touching the fingerplate, the image taken by the image pick-up element changes and the pointer displayed on a display screen is moved in a direction according to a change direction and by a distance corresponding to a quantity of change.
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Citations
10 Claims
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1. A pointing device for moving a pointer shown on a display screen, comprising:
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a transparent plate having an outer surface to contact a surface of an object;
image detecting means for detecting an image of the surface of said object that contacts an outer surface of said plate; and
optical means for forming an image on the outer surface of said plate on a detection plane of said image detecting means, wherein said pointer is configured to be able to move according to a movement of the image on the outer surface of said plate detected by said image detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification