Proximity detection matrix display device
First Claim
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1. An electronic display device comprising:
- means of detection of proximity of a conducting element situated in proximity to a display zone of the device;
a set of row electrodes and of column electrodes scanning the display zone;
means for generating an excitation of the row electrodes and of the column electrodes as a function of an image to be displayed on the display zone, comprising switches for applying the excitation successively to each of the row electrode and to each of the column electrodes;
means for applying a specific electrical signal distinct from the excitation successively to each of the row electrode and to each of the column electrodes through the switches,means for continuously detecting modifications of the specific electrical signal which are induced by the presence of a conducting element in proximity to a region of the display zone,and means for determining the position of said region as a function of said detected modifications.
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Abstract
The invention concerns an electronic display device comprising means of detection of proximity of a conducting element situated in proximity to a display zone of the device, a set of row electrodes (4) and of column electrodes scanning the display zone, means for generating an excitation of the row electrodes and of the column electrodes as a function of an image to be displayed on the display zone. The proximity detection means comprise:
- means (7) for applying a specific electrical signal distinct from the excitation to said set,
- means (8) for detecting modifications of the specific electrical signal which are induced by the presence of a conducting element in proximity to a region of the display zone,
- and means (15) for determining the position of said region as a function of said detected modifications.
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Citations
18 Claims
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1. An electronic display device comprising:
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means of detection of proximity of a conducting element situated in proximity to a display zone of the device; a set of row electrodes and of column electrodes scanning the display zone; means for generating an excitation of the row electrodes and of the column electrodes as a function of an image to be displayed on the display zone, comprising switches for applying the excitation successively to each of the row electrode and to each of the column electrodes; means for applying a specific electrical signal distinct from the excitation successively to each of the row electrode and to each of the column electrodes through the switches, means for continuously detecting modifications of the specific electrical signal which are induced by the presence of a conducting element in proximity to a region of the display zone, and means for determining the position of said region as a function of said detected modifications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification