JPS5937875Y2 - Tablet - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a tablet used as an input device for inputting character information such as Chinese characters to an information processing device such as a computer.

Conventional tablets of this type are shown in FIGS. 1 to 3.

In the tablet shown in Figs. 1 and 2, a large number of conductors 2□y22, y23... extending in the X direction are arranged at equal pitches on an insulating substrate 1, with a dielectric insulating layer 3 interposed thereon. A large number of conductors 4□, 4□ extend in the Y direction perpendicular to the X direction.
, 43 . . . are arranged at equal pitches, and a dielectric insulating layer 5 is formed thereon.

Information such as letters is displayed on the surface of the insulating layer 5 facing the intersection of each conductor in the X and Y directions (hereinafter referred to as an electrode section).

This tablet displays information on each electrode section, that is, an X that corresponds to each electrode section.

A tablet device is purchased which is electrically connected to a printed circuit board (not shown) provided with a circuit for detecting the Y-coordinate position.

As shown in FIG. 3, a stylus nib 7 having a tip W of a stylus pen body 6 is provided on an information display portion on an insulating layer 5 facing an electrode portion A of a conductor 22.43. When the stylus nib 7 of the pen 8 is brought into contact with the stylus nib 7, an electrostatic coupling is generated between the electrode portion A and the stylus nib T, and the high frequency signal input to the stylus pen 8 is input to the printed circuit board via the conductor 22゜43. The X and Y coordinate positions are recognized.

However, in such tablets, the lower conductor electrode is blocked by the upper conductor electrode in the electrode section, making the electrostatic coupling with the stylus tip unstable and causing malfunctions. Ta.

In order to solve this problem, the tablet shown in Fig. 4 has lower conductors 2□', 2□', 23', .
Upper conductor 41' facing each electrode, 4°/t
4j'.

A hole 9 is provided in each electrode to stabilize the electrostatic coupling.

However, in this case, when the stylus pen tip is brought into contact with the information display section facing each electrode section, the contact position is not constant (deviates from the position facing the center of the hole 9) as illustrated in FIG. There is a drawback that the voltage level detected by each electrode of the electrode part varies greatly, and it is difficult to align the pan electrodes, which requires placing the hole 9 in the center of the lower electrode.

The present invention is intended to solve the various drawbacks mentioned above, and provides a tablet that allows easy alignment between electrodes, has constant capacitance at each electrode, is larger than conventional tablets, and has good switch sensitivity. The purpose is to

Next, an embodiment of the present invention will be described with reference to FIGS. 6 and 7.

FIG. 6 is a front sectional view showing an embodiment of the tablet according to the present invention, and FIG. 7 is a schematic perspective view of the same. In the figure, 11 is an insulating substrate, 12 is a first electrode, 13 is a second electrode, and 14 is a third electrode,
15 and 16 are dielectric insulating layers.

These are laminated to form a tablet as shown in FIG.

The third electrode 14 is one surface of the capacitor and the first insulating layer 16
The first electrode 12 and the second electrode 13 are arranged in a matrix as shown in FIG. None provided.

Each first electrode 12 has a conductor 11□ extending in the X direction,
112, 173..., each second electrode 1
3 are conductors 181°18□ and 18 extending in the Y direction, respectively.
3. ······It is connected to the.

These opposing third electrode 14 and first electrode 12. The second electrodes 13 each constitute an electrode section.

In this way, in each electrode part, the first electrode 12° and the second electrode 13 are formed offset so as not to overlap each other in the stacking direction, so that the lower first electrode 12 is the same as the upper second electrode 13. The third electrode 14 covers the electrodes 12 and 13, so the third electrode 14 covers the electrodes 12 and 13. No matter where the stylus tip T is brought into contact with the four electrodes, the capacitance does not change, and the capacitance can be increased.

Compared to the conventional tablet shown in FIG. 4, positioning between the electrodes can be made easier.

Note that if the stylus pen tip 1 is made of a conductive elastic material, it is possible to eliminate the influence of variations in the pen touch.

As described above, according to the present invention, it is possible to prevent malfunctions due to stray capacitance, to increase the capacitance of the electrostatic coupling of the electrode portion to 7 constant, and to make it larger than before, and to facilitate alignment between the electrodes. It is possible to achieve various excellent effects.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a schematic perspective view of a conventional tablet, Figure 3 is a schematic perspective view of its operation, Figure 4 is a schematic perspective view of another conventional tablet, and Figure 5 is a schematic perspective view of its operation. 6 is a regular view showing an embodiment of the tablet according to the present invention, and FIG. 7 is a schematic perspective view of the same. In the figure, 6 is a stylus pen body, 7 is a stylus pen tip, 8 is a smailus pen,
11 is an insulating substrate, 12 is a first electrode, 13 is a second electrode, 1
4, third electrode, 15, 16II′i insulating layer, 17□. 172.1T3...-218□, 18□, and 183 are conductors.

Claims (1)

[Scope of utility model registration request] The stylus pen has a large number of electrode parts arranged in a matrix, each consisting of a plurality of electrodes laminated through an insulating layer made of a dielectric material, and the surface facing any of the electrode parts is attached to the stylus pen at the tip of the stylus pen body. In a tablet that transmits positional information of the electrode portion by contacting with the tip, the electrode portion is deviated from the first electrode so as not to overlap in the stacking direction on the first electrode.
A tablet comprising: a second electrode arranged in a pair with the electrode; and a third electrode arranged on the second electrode so as to cover the second electrode and the first electrode. .