Touch controlled display device
First Claim
1. In a touch controlled display device having first and second display electrodes disposed on the inside of a front cover window of said device capable of displaying information and a counter-electrode within said device, wherein said first and second electrodes and said counter-electrode cooperate to form a display means, and wherein said counter-electrode activates the display of said information, the improvement comprising said first and second electrodes being adapted for inclusion in a capacitive sensing circuit, wherein the capacitance between said first and second electrodes is measured by said capacitive sensing circuit.
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Accused Products
Abstract
A touch controlled display device has, in one embodiment, two displaying segments disposed on the inside of a front cover window in an LCD unit. Further to causing the segments to display different sign information by providing them with different feeds, they are both utilized as sensing means included in a capacitative sensing circuit which is activable by the finger of an operator.
71 Citations
15 Claims
- 1. In a touch controlled display device having first and second display electrodes disposed on the inside of a front cover window of said device capable of displaying information and a counter-electrode within said device, wherein said first and second electrodes and said counter-electrode cooperate to form a display means, and wherein said counter-electrode activates the display of said information, the improvement comprising said first and second electrodes being adapted for inclusion in a capacitive sensing circuit, wherein the capacitance between said first and second electrodes is measured by said capacitive sensing circuit.
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7. A touch controlled display device, said device comprising:
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at least one first electrode capable of displaying information; at least one second electrode capable of displaying information and positioned adjacent said first electrode and having a predetermined electrical capacitance therebetween, said capacitance changing when said first and second electrodes come in close proximity to the user, wherein the change in said capacitance is measured; a counter-electrode which cooperates with said first electrode and said second electrode to form a display means, wherein said counter-electrode activates the display of said information; display control means coupled to said first and second electrodes for controlling the display operation of said first and second electrodes; and detector means coupled to said first and second electrodes for detecting said electrical capacitance, wherein in response to said first and second electrodes coming in close proximity to the user, said detector means provides a first signal when said capacitance is below a predetermined level and a second signal when said capacitance is above a predetermined level. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification