Proximity detection matrix display device
First Claim
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 (4) and of column electrodes (5) 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, characterized in that 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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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.
12 Citations
16 Claims
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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 (4) and of column electrodes (5) 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, characterized in that the proximity detection means comprise:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification