Data reading device and method thereof, and data transmission device and method thereof
A data reading device that transmits power to a data transmission device and reads data transmitted from the data transmission device is provided. The data reading device includes: a first electrode, forming a first coupling capacitance with the data transmission device; a second electrode, forming a second coupling capacitance with the data transmission device; a control circuit, coupled to the first electrode and the second electrode, configured to provide the first electrode with a first reference voltage and the second electrode with a second reference voltage to cause a voltage difference between the first electrode and the second electrode to vary with time, and to detect charge changes of the first coupling capacitance and the second capacitor; and a determination unit, coupled to the control circuit, configured to determine the data according to the charge changes.
1. A data reading device, configured to read data transmitted from a data transmission device, the data reading device comprising:
a first electrode, forming a first coupling capacitance with the data transmission device;
a second electrode, forming a second coupling capacitance with the data transmission device; and
a control circuit, configured to provide the first electrode with a first reference voltage and the second electrode with a second reference voltage, and to detect charge changes of the first coupling capacitance and the second coupling capacitance,
wherein the data reading device determines the data according to the charge changes,
wherein the data reading device comprises a capacitive touch panel comprising a plurality of detection units, the first electrode comprises a first part of the detection units, and the second electrode comprises a second part of the detection units, and the first electrode and the second electrode are configured for self-capacitive touch sensing or mutual capacitive touch sensing, and
wherein the data transmission device comprises another capacitive touch panel that forms the first coupling capacitance and the second coupling capacitance with the first electrode and the second electrode, respectively.
2. The data reading device according to claim 1 , wherein the control circuit renders a voltage difference between the first electrode and the second electrode to vary with time.
3. The data reading device according to claim 1 , wherein the first electrode and the second electrode are in the same plane.
4. The data reading device according to claim 1 , wherein the control circuit dynamically determines a configuration direction or area of the first part and the second part according to a data reading result.
5. A data transmission device, configured to transmit data to a data reading device, the data transmission device comprising:
a first electrode, forming a first coupling capacitance with the data reading device;
a second electrode, forming a second coupling capacitance with the data reading device;
a rectifier, coupled to the first electrode and the second electrode, configured to generate a voltage according to a voltage difference between the first electrode and the second electrode;
a switch element, coupled between the first electrode and the second electrode;
a control circuit, coupled to the rectifier and the switch element, that receives the voltage and controls an on or off status of the switch element to change charges of the first electrode and the second electrode; and
a capacitor, coupled between the first electrode and the second electrode, configured to connect the first coupling capacitance and the second coupling capacitance in series,
wherein the data transmission device comprises a capacitive touch panel that comprises a plurality of detection units, the first electrode comprises a first part of the detection units, and the second electrode comprises a second part of the detection units, and the data reading device receives the data through detecting the charge changes, and the first electrode and the second electrode are configured for self-capacitive touch sensing or mutual capacitive touch sensing, and
wherein the data reading device comprises another capacitive touch panel that forms the first coupling capacitance and the second coupling capacitance with the first electrode and the second electrode, respectively.
6. A data reading method, applied to a data reading device, for reading data transmitted from a data transmission device, the data reading method comprising:
providing a first reference voltage to a first electrode of the data reading device and providing a second reference voltage to a second electrode of the data reading device, the first electrode forming a first coupling capacitance with the data transmission device, the second electrode forming a second coupling capacitance with the data transmission device;
detecting charge changes of the first coupling capacitance and the second coupling capacitance; and
generating a data reading result according to the charge changes,
the method being applied to a capacitive touch panel, the capacitive touch panel comprising a plurality of detection units, wherein providing the first reference voltage to the first electrode comprises selecting a first part of the detection units to form the first electrode, and providing the second reference voltage to the second electrode comprises selecting a second part of the detection units to form the second electrode, wherein the first electrode and the second electrode are configured for self-capacitive touch sensing or mutual capacitive touch sensing, and
wherein the data transmission device comprises another capacitive touch panel that forms the first coupling capacitance and the second coupling capacitance with the first electrode and the second electrode, respectively.
7. The data reading method according to claim 6 , wherein a voltage difference between the first electrode and the second electrode varies with time.
8. The data reading method according to claim 6 , further comprising: dynamically determining a configuration direction or area of the first part and the second part according to the data reading result.
9. A data transmission method, applied to a data transmission device, for transmitting data to a data reading device, the data transmission method comprising:
forming a first coupling capacitance between a first electrode of the data transmission device and the data reading device;
forming a second coupling capacitance between a second electrode of the data transmission device and the data reading device; and
providing a capacitor, the capacitor being coupled between the first electrode and the second electrode, and configured to connect the first coupling capacitance and the second coupling capacitance in series,
the method applied to a capacitive touch panel, the capacitive touch panel comprising a plurality of detection units, wherein forming the first coupling capacitance comprises selecting a first part of the detection units to form the first electrode, and forming the second coupling capacitance comprises selecting a second part of the detection units to form the second electrode, and the data reading device receives the data through detecting charge changes, wherein the first electrode and the second electrode are configured for self-capacitive touch sensing or mutual capacitive touch sensing,
wherein the data reading device comprises another capacitive touch panel that forms the first coupling capacitance and the second coupling capacitance with the first electrode and the second electrode, respectively.
10. The data transmission method according to claim 9 , further comprising:
rectifying a voltage difference between the first electrode and the second electrode to generate a voltage.
11. The data transmission method according to claim 9 , wherein potentials of the first electrode and the second electrode vary in a predetermined period according to the data to change charges of the first electrode and the second electrode.