Cover film for pen sensor and pen sensor
AssigneeWacom Co., Ltd.
InventorJun Kadowaki
Life of this patent
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Abstract
A cover film used together with a pen sensor including a plurality of sensor electrodes, and a sensor controller which detects a position of an active pen in reference to a distribution of signal levels each corresponding to an amount of electric charge induced in an individual one of the plurality of sensor electrodes by a pen signal transmitted from a pen tip electrode disposed at a tip of the active pen. The cover film includes a conductive resin that covers an effective area formed by the sensor electrodes for detection of the position of the active pen and that includes a substantially uniform resistance component at least within a range of the effective area. The cover film is arranged, without via a cover glass, on an upper surface of a sensor electrode group including the plurality of sensor electrodes.
Claims12
A cover film used together with a pen sensor including a plurality of sensor electrodes, and a sensor controller that, in operation, detects a position of a pen in reference to a distribution of signal levels each corresponding to an amount of electric charge induced in an individual one of the plurality of sensor electrodes by a pen signal transmitted from a pen tip electrode disposed at a tip of the pen, the cover film comprising:
- a conductive resin that covers an effective area formed by the plurality of sensor electrodes for detection of the position of the pen and that includes a substantially uniform resistance component at least within a range of the effective area, wherein the cover film is arranged, without via a cover glass, on an upper surface of a sensor electrode group including the plurality of sensor electrodes.
A pen sensor connected to a sensor controller that, in operation, detects an active pen that, in operation, transmits a pen signal from a pen tip electrode, the pen sensor comprising:
- a plurality of sensor electrodes each connected to the sensor controller;
- and
- a cover film that covers an effective area formed by the plurality of sensor electrodes for detection of a position of the pen, that has conductivity, that includes a substantially uniform resistance component at least within a range of the effective area, and that is arranged, without via a cover glass, on an upper surface of a sensor electrode group including the plurality of sensor electrodes.
An electronic device comprising:
- a sensor controller that, in operation, detects an active pen that sends a pen signal from a pen tip electrode;
- a pen sensor connected to the sensor controller, the pen sensor including a plurality of sensor electrodes connected to the sensor controller;
- and
- a cover film that covers an effective area formed by the sensor electrodes for position detection of the active pen, that has conductivity, and that has a substantially uniform resistance component at least within a range of the effective area, wherein the cover film is arranged, without via a cover glass, on an upper surface of a sensor electrode group including the plurality of sensor electrodes.
Dependencies are inferred from the claim text.