Transparent digitiser
First Claim
Patent Images
1. A passive stylus for use with a digitizer, comprising:
- an outer stylus shaped front housing having a front tip,a corresponding reverse tip, the reverse tip located at a second end of the stylus remote from said front tip,a resonator arrangement electrically connected at one end to both the front tip and the reverse tip and at another end to both the front housing and the rear housing, the resonator arrangement having a resonant frequency, anda first gap formed between the front housing and the front tip across which said resonator arrangement is coupled, to create a first electric field concentration in a vicinity of said front tip,a second gap formed between the rear housing and the reverse tip across which said resonator arrangement is coupled, to create a second electric field concentration in a vicinity of said rear tip.
6 Assignments
0 Petitions
Accused Products
Abstract
A digitizer for user interaction via an object with an electronically refreshable display screen, the digitizer comprising: a transparent sensing arrangement of detectors located at said electronically refreshable display screen for detecting an electric field of said object, said detectors having outputs, and an arrangement of differential amplifiers associated with said outputs, thereby to apply differential detection between said outputs.
76 Citations
15 Claims
-
1. A passive stylus for use with a digitizer, comprising:
-
an outer stylus shaped front housing having a front tip, a corresponding reverse tip, the reverse tip located at a second end of the stylus remote from said front tip, a resonator arrangement electrically connected at one end to both the front tip and the reverse tip and at another end to both the front housing and the rear housing, the resonator arrangement having a resonant frequency, and a first gap formed between the front housing and the front tip across which said resonator arrangement is coupled, to create a first electric field concentration in a vicinity of said front tip, a second gap formed between the rear housing and the reverse tip across which said resonator arrangement is coupled, to create a second electric field concentration in a vicinity of said rear tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A passive stylus for use with a digitizer, comprising:
-
an outer stylus shaped housing having a front tip, a resonator arrangement electrically connected at one end to the front tip and at another end to the housing, the resonator arrangement having a resonant frequency, a gap formed between the housing and the front tip across which said resonator arrangement is coupled, to create an electric field concentration in a vicinity of said front tip, and a reverse tip located at a second end of the stylus remote from said front tip, a conductor arrangement extending to said reverse tip, wherein a geometry of the gap in the vicinity of said reverse tip is defined to be different from the geometry of the gap in the vicinity of said front tip, thereby to provide a detectable difference between output from said front and reverse tips. - View Dependent Claims (13)
-
-
14. A passive stylus for use with a digitizer, comprising:
-
an outer stylus shaped housing having a front tip, a resonator arrangement electrically connected at one end to the front tip and at another end to the housing, the resonator arrangement having a resonant frequency, a gap formed between the housing and the front tip across which said resonator arrangement is coupled, to create an electric field concentration in a vicinity of said front tip, and a reverse tip located at a second end of the stylus remote from said front tip, a conductor arrangement extending to said reverse tip, wherein a size of an electric field concentration of said reverse tip is defined to be larger than a size of the electric field concentration of said front tip, thereby to provide a detectable difference between said electric field concentration from the front and reverse tips. - View Dependent Claims (15)
-
Specification