JPH01133632U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the input pen of the present invention, Figures 2 a and b are diagrams showing the positional relationship between the ferrite chip and the coil, and Figure 3 is coordinate input using the input pen of the present invention. A configuration diagram showing an example of the device, Figure 4 is a detailed configuration diagram of the loop coil group in the X direction and Y direction of the tablet, Figure 5 is a signal waveform diagram of each part of Figure 3, and Figure 6 is a diagram of the control circuit. Processing flowcharts, Figures 7a, b, and c are timing diagrams showing basic coordinate detection operations in the control circuit, and Figure 8 shows detection voltages obtained from each loop coil during the first coordinate detection operation. Figure 9 is a timing diagram showing the coordinate detection operation and phase detection operation from the second time onwards, Figure 10 is a flowchart of the process in the host computer, and Figure 11 is the case where the input pen is moved while changing the pen pressure. Figures 12a and 12b are diagrams showing an example of the output results. 10... Input pen, 12... Core body, 13, 13'...
Ferrite chip, 14...coil, 18...capacitor.

Claims (1)

[Scope of Claim for Utility Model Registration] A core held so that it can be slightly displaced and restored in the direction of the pen axis, a coil that can slidably accommodate the core, and a capacitor connected to the coil. An input pen for a coordinate input device, comprising: a ferrite chip provided in the core at a position corresponding to both ends of the coil.