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US 2010/0134438 A1Published application
Multi-touch sensing circuit
AssigneeSamsung Electronics Co., Ltd.
InventorsJae-suk Yu, Yoon-kyung Choi, Hyoung-tae Kim, Joo-hyeon Lee
Life of this patent
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Abstract
A multi-touch sensing includes a voltage-current converter converting an input voltage into a current. A touch sensing block senses touch of an object. An amplifier includes a first input terminal connected to an output terminal of the voltage-current converter and to a first terminal of the touch sensing block. A second input terminal of the amplifier is grounded. An output terminal of the amplifier is connected to a second terminal of the touch sensing block.
Claims16
A multi-touch sensing circuit comprising:
- a voltage-current converter that converts an input voltage into a current;
- a touch sensing block that senses touch of an object;
- and
- an amplifier,
- wherein a first input terminal of the amplifier is connected to an output terminal of the voltage-current converter and to a first terminal of the touch sensing block, a second input terminal of the amplifier is grounded, and an output terminal of the amplifier is connected to a second terminal of the touch sensing block.
2 more elements
A touch sensing apparatus, comprising:
- a plurality of substantially parallel row circuit lines;
- a plurality of substantially parallel column circuit lines insulated from the substantially parallel row circuit lines such that a capacitance is formed between a respective one of the substantially parallel row circuit lines and a respective one of the substantially parallel column circuit lines;
- and
- a switching circuit coupled to each of the substantially parallel row circuit lines and to each of the substantially parallel column circuit lines and configured to provide an output circuit path to output the capacitance in response to switching circuit control signals.
1 more element
Dependencies are inferred from the claim text.