Input device for touch-sensitive capacitive displays

Abstract

An input device for capacitive, touch-sensitive displays, wherein the device is a simple pen, wherein the simple pen can be sharpened, wherein the device is present as a core, or wherein the device is present as a core with a coating, or wherein the device is present as core with a casing, or wherein the device includes a core, a casing and a coating, and wherein the core, the casing and/or the coating are configured so as to be electrically conductive.

Claims

1. An input device for a capacitive touch-sensitive display, wherein the device is a sharpenable stylus sharpenable by a conventional pencil sharpener, wherein the device consists essentially of: a lead core encased in a non-conductive wood casing to form a pencil, wherein the lead core is electrically conductive; and a line break between the conductive core and a user's hand, wherein the line break is a dielectric, the stylus having a first tip end where the lead forms a tip for writing on a surface and a second end opposite the tip end, the lead core extending from the tip end to the second end so that both the lead tip and the second end of the stylus provide an input function to the capacitive display.

2. The device according to claim 1, wherein the casing is made of plastic and/or wood substitute.

3. The device according to claim 1, wherein the core comprises conductive constituents or additives, wherein the additives are at least one of the group consisting of: graphite, carbon fiber, conductive soot, metal fibers, carbon nano tubes, copper pigments, silverplated copper pigments and/or silver powder.

4. The device according to claim 1, wherein the core, the casing and/or a coating comprise anti-static agents as additives.

5. The device according to claim 4, wherein the coating is a color layer or a foil layer.

6. A method for activating a location on a capacitive touch-sensitive display, comprising the steps of: providing an input device according to claim 1; and activating a location on the capacitive, touch sensitive display by contacting the location with the input device.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIG. 1: Input device consisting of a core with a core casing as well as a coating;

(2) FIG. 2: Input device consisting of a core and a core casing;

(3) FIG. 3: Input device consisting of a core.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIG. 1 shows an input device 1, which comprises a core 112 with a core casing 113 and a coating 118. In the embodiment shown the casing 113 and the core 112 are configured so as to be electrically conductive. The thin coating 118 may, but need not be, configured to be electrically conductive. In case the coating 118 is not configured to be electrically conductive, a capacitor/dielectric is formed, for an application not shown, between the hand of the user and the input device 1. Since with thin coatings 118 the capacity is very high, the charge displacement when contacting the tablet is sufficient for achieving or triggering an input function.

(5) Since in this embodiment the core 112 and thus also the tip 117 are configured to be conductive, an input function can be triggered at the tablet both via the tip 117 and via the end opposite the tip.

(6) FIG. 2 shows and describes an alternative implementation of an input pen 1 which comprises a core 112 with a casing 113.

(7) FIG. 3 shows an input device 1, which is configured as a solid core pen 11. The core 112 in this embodiment extends across the entire cross-section of the pen 11.

(8) For an application not shown, the user contacts the surface of the tablet with the input device and thus establishes an electrically conductive connection between the tablet and the hand of the user. This leads to a charge displacement thereby triggering an input function on the tablet or tablet-PC.

(9) At the end opposite the tip 117 a gliding lacquer layer 119 has been applied which in this embodiment is configured not to be conductive.

(10) These input devices are intended for use on capacitive, touch-sensitive displays of so-called tablet computers or smart phones. The device is a simple pen, wherein the simple pen can be sharpened, wherein the device is present as a core, or wherein the device is present as a core with a coating, or wherein the device is present as core with a casing, or wherein the device comprises a core, a casing an a coating. The core, the casing and/or the coating are configured so as to be electrically conductive.

(11) The core, the casing, and/or the coating comprise conductive constituents or additives, wherein these additives are present in the form of graphite, carbon fiber, conductive soot, metal fibers, carbon nano tubes, copper pigments silver-plated copper pigments and/or silver powder.

ITEM LIST

(12) 1 Input device 11 simple pen 112 core 113 casing 117 tip 118 coating 119 gliding lacquer