JPH0447933B2 - - Google Patents

Description

Detailed Description of the Invention The present invention includes a plurality of X-axis electrode lines arranged in parallel to extend in the X-axis direction and a plurality of Y-axis electrode lines arranged in parallel to extend in the Y-axis direction. This invention relates to a matrix switch configured by orthogonally arranging switches with gaps in between.

Conventionally, this type of matrix switch has been configured to input and output signals for each X-axis electrode line and each Y-axis electrode line, so a very large number of signals corresponding to the total number of each electrode line are required. There is a problem in that wires are required, which not only makes wiring the signal lines troublesome, but also requires a large amount of wiring space, resulting in an increase in overall size.

The present invention has been made in view of the above circumstances, and an object thereof is to be able to reduce the number of required signal lines, thereby simplifying the wiring process of the signal lines, and to reduce the number of signal lines. To provide a matrix switch which has effects such as reducing the wiring space and eliminating the risk of increasing the overall size.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numerals 1, 2, and 3 indicate first, second, and third substrates arranged in parallel so that gaps 4 and 5 exist between them, and at least two of these For example, the second and third substrates 2 and 3 are formed of flexible printed wiring boards, and the first substrate 1 is formed of a normal printed wiring board. 6 is, for example, 16 X-axis electrode wires, which are m pieces arranged in parallel to extend in the X-axis direction, on the first substrate 1 (particularly on its top surface), and 7 is on the second substrate (particularly on its top surface). n (for example, 16 Y) electrodes are arranged in parallel to extend in the Y-axis direction (lower surface) and arranged orthogonally to the X-axis electrode wire 6 with a gap 4 interposed therebetween.
These are axial electrode wires, and each of these electrode wires 6 and 7 is formed by etching or printing means.
8 are arranged in parallel by printing means or the like on a surface of the second substrate 2 opposite to the surface on which the Y-axis electrode lines 7 are arranged (i.e., the upper surface of the second substrate 2) so as to extend in the X-axis direction. There are, for example, four auxiliary X-axis electrode lines 8, and each auxiliary X-axis electrode line 8 is formed wide so as to correspond to a predetermined number of, for example, four X-axis electrode lines 6. Specifically, the second
As shown in the figure, each of the 16 X-axis electrode lines 6 is labeled 6 ₁ , 6 ₁ , ... 6 ₁₆ , and each of the 4 auxiliary X-axis electrode lines 8 is labeled as shown in FIG. 3. When the symbols 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ are attached, the auxiliary X-axis electrode line 8 ₁ corresponds to the X-axis electrode lines 6 ₁ to 6 ₄ , and the other auxiliary X-axis electrode lines 8 2 , 8 ₃ correspond to the X-axis electrode lines 6 ₁ to 6 4 . , 8 ₄ is the X-axis electrode line 6 ₅ to 6
₈ , ₆₉ to ₆₁₂ , and ₆₁₃ to _616, respectively.
Printing means, etc. 9 are arranged in parallel on the third substrate 3 (particularly on the lower surface thereof) so as to extend in the Y-axis direction, and arranged orthogonally to the auxiliary X-axis electrode line 8 through the gap 5. n', for example, four auxiliary Y-axis electrode lines 9 are provided, and each auxiliary Y-axis electrode line 9 is formed wide so as to correspond to a predetermined number of Y-axis electrode lines 7, for example, four. has been done. Specifically, as shown in Fig. 2, 16 Y-axis electrode lines 7
7 _{1 ,} 7 _{2 ,} . . . _{7 16} , and as shown in FIG _. , the auxiliary Y-axis electrode line 9 ₁ corresponds to the Y-axis electrode lines 7 ₁ to 7 ₄ , and the other auxiliary Y-axis electrode lines 9 ₂ , 9 ₃ , and 9 ₄ correspond to the Y-axis electrode lines 7 ₅ to 7 ₈ , ₇₉ to ₇₁₂ , and ₇₁₃ to ₇₁₆ , respectively. Thus, the X-axis electrode lines 6 ₁ to 6 ₁₆ are extracted one by one from each group corresponding to the auxiliary X-axis electrode lines 8 ₁ to 8 ₄ , respectively, and combined to form a group of four. First signal lines 10a, 10 are divided into groups and provided corresponding to the respective X-axis electrode line groups 6A, 6B, 6C, 6D.
b, 10c, and 10d. Also,
The Y-axis electrode lines 7 ₁ to 7 ₁₆ are extracted one by one from each group corresponding to the auxiliary Y-axis electrode lines 9 ₁ to 9 ₄ and are combined into four groups of four lines each. , each Y-axis electrode line group 7A, 7B, 7C,
A second signal line 1 provided corresponding to 7D.
1a, 11b, 11c, and 11d. Furthermore, auxiliary X-axis electrode lines 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄
A third signal line 12 provided corresponding to each
a, 12b, 12c, 12d, and
Fourth signal lines _13a , 13b, 1 are provided corresponding to the auxiliary Y-axis electrode lines 91, ₉₂ , ₉₃ , _94, respectively.
3c and 13d. Also, 17,
17 are spacers formed on the first and third substrates 1 and 3 by printing means, and these spacers 17 form a gap 4 between the first substrate 1 and the second substrate 2 as well as the second substrate 2. , the gap 5 between the third substrates 3 is maintained, respectively. And the first to third points mentioned above.
substrates 1 to 3,
d, the matrix switch 1 is connected by the third signal lines 12a to 12d and the fourth signal lines 13a to 13d.
4 are configured.

In FIG. 4 showing the electrical connection relationship, 15 is a microcomputer, and its output terminals Qa ₀ ,
Qa ₁ , Qa ₂ and Qa ₃ are connected to the first signal lines 10a and 1, respectively.
0b, 10c, and 10d, and the output terminals Qb ₀ , Qb ₁ , Qb ₂ , and Qb ₃ are connected to the third signal lines 12a, 12b, 12c, and 12d, respectively, and the input terminal Pa ₀ , Pa ₁ , Pa ₂ , and Pa ₃ are connected to second signal lines 11a, 11b, 11c, and 11d, respectively, and input terminals Pb ₀ , Pb ₁ ,
Pb ₂ and Pb ₃ are connected to the fourth signal lines 13a, 13b, respectively.
13c and 13d. Then, second and fourth signal lines 11a to 11d, 13a to 13
d are grounded through separate pull-down resistors 16, respectively.

Next, the operation of the above configuration will be explained with reference to FIG. 5, which shows the control contents of the microcomputer 15. Incidentally, FIG. 5 shows a flowchart of a subroutine for reading the ON state of the matrix switch 14 by the microcomputer 15. Now, from the output terminals Qa ₀ , Qa ₃ and Qb ₀ to Qb ₃ of the microcomputer 15, the 4-bit scanning signals Sa and Sb with the outputs of the output terminals Qa ₀ and Qb ₀ as the least significant bits are "0001". → “0010” → “0100” → “1000”
The microcomputer 15 first outputs the scanning signal "0001" in the "standby" step (a) and the subsequent "standby" step (b) shown in FIG. It is in a state where it can output signals Sa and Sb, and outputs the scanning signal Sa in the next "output" step (c), and further outputs the scanning signal Sb in the next "output" step (d). Then, a "1" level signal is given to the first signal line 10a and the third signal line 12a, respectively, and a "1" level signal is given to the first signal lines 10b, 10c, 10d and the third signal lines 12b, 12c, 12d, respectively. Since the "0" level signal is applied, the X-axis electrode lines 6 ₁ , 6 ₅ , 6 ₉ , 6 ₁₃ and the auxiliary Y-axis electrode line 8 ₁ each exhibit a high level. At this time,
A predetermined portion of the third substrate 3 is pressed and the third substrate ₃ and the second substrate ₂ are deformed. When the axis electrode line 8 ₂ and the auxiliary Y-axis electrode line 9 ₁ are in contact with each other, the X-axis electrode lines 6 ₁ , 6 ₅ , 6 ₉ , 6 exhibiting a high level as described above. ₁₃ and the auxiliary X-axis electrode line 8 ₁ , the Y-axis electrode line 7 ₁ ~
7 ₁₆ and the auxiliary Y-axis electrode lines 9 ₁ to _{9 4} are all in a non-contact state, so that the second and fourth signal lines 11a to 1
"0" level signals corresponding to the ground level are output from 1d and 13a to 13d, respectively. Thus, in the "input" step (e) after the output step (d), the microcomputer 15 converts the signals from the second and fourth signal lines 11a to 11d and 13a to 13d into 4-bit data signals Sc. , Sd (input terminal
After reading each input of Pa ₀ and Pb ₀ as the least significant bit, the process moves to the determination step (f). In this discrimination step (F), the X-axis electrode wire (in this case, the X-axis electrode wire 6 ₁ ,
6 ₅ , 6 ₉ , 6 ₁₃ ) and the auxiliary X-axis electrode line (in this case, the auxiliary X-axis electrode line 8 ₁ ), the Y-axis electrode lines 7 ₁ to 7 ₁₆ and the auxiliary Y-axis electrode lines 9 ₁ to It is determined whether or not both of the data _signals Sc and Sd contain a "1" bit. At this time, the data signal Sc,
Since both Sds are "0000", it is determined as "NO". If the judgment is "NO" in the judgment step (F), the process jumps to the judgment step (H), and in this judgment step (H) it is judged whether the scanning signal Sb is "1000" or not. Since the scanning signal Sb is "0001", it is determined as "NO", and the process moves to the next "shift" step (re). In this "shift" process (li), "1" in the scanning signal Sb
It shifts the bit corresponding to
Sb is changed to "0010", after which the process returns to the "output" step (d), and the scanning signal Sb "0010" is outputted from the output terminals Qb ₀ , Qb ₁ , Qb ₂ , and Qb ₃ . Then, a “1” level signal is applied to the third signal line 12b and the auxiliary Y-axis electrode line 8 ₂ exhibits a high level, so that the auxiliary Y-axis electrode line 9 ₁ that is in contact with this auxiliary X-axis electrode line 8 ₂ comes to exhibit a high level, and as a result, data signal Sb of "0001" is read in the next "input" step (e). However, at this point, other data signals Sc are still "0000", so in the determination step (f), it is determined as "NO". After this, the determination process (H) → "Shift" process (R) → "Output" process (D) →
The program is executed cyclically in the order of "input" process (E) → discrimination process (F) and discrimination process (H), and finally when the result is "YES" in the discrimination process (H) (scanning signal Sb is "1000"). ”), the process moves to the determination step (nu). In this determination step (N), it is determined whether the scanning signal Sa is "1000" or not, but in this case, since the scanning signal Sa is "0001", it is determined as "NO", and the next "shift" step ( ). This "shift"
In the step (ru), the bit corresponding to "1" in the scanning signal Sa is shifted one step to the left. Therefore, in this case, the scanning signal Sa is changed to "0010", and after this, the bit corresponding to "1" is shifted to the left by one step. The machine is returned to the "standby" process (b). For this reason, the "output"
Scanning signal “0010” in process (c)
Sa is output from the output terminals Qa ₀ , Qa ₁ , Qa ₂ , Qa ₃ , and in the "output" step (d), the scanning signal Sb of "0001" is output from the output terminals Qb ₀ , Qb ₁ .Qb ₂ ,
Output from Qb ₃ . Then, the X-axis electrode wire 6 ₂ ,
Since 6 ₆ , 6 ₁₀ , and 6 ₁₄ exhibit a high level, the Y-axis electrode line 73 that is in contact with the X-axis electrode line 6 ₆ comes to exhibit a high level, and as a result, the next input step
In (e), the data signal Sc "0100" is read, but at this point other data signals
As understood from the above, since Sd is "0000", it is determined as "NO" in the determination step (f). After this, the discrimination process (H) → "Shift" process
(i)→When the "output" step (d) is executed and the scanning signal Sb "0010" is output, the data signal
Since Sd changes to "0001", the next "input" step (e)
Then, the data signal Sc of "0100" and the data signal Sd of "0001" are read. Therefore, in the next determination step (f), since both the data signals Sc and Sd contain a "1" bit, it is determined as "YES" and the process moves to the "calculation" step (g). In this "calculation" step (g), the data signal Sc read as described above,
The switching position of the matrix switch 14 is calculated based on Sd and the scanning signals Sa and Sd at this point in time. That is, the scanning signal Sa of "0010" causes the X-axis electrode line 6 ₂ ,
It can be seen that switching is performed at any one of 6 ₆ , 6 ₁₀ , and 6 ₁₄ , and the X-axis electrode line 6 ₅ , which corresponds to the auxiliary X-axis electrode line 8 ₂ by the scanning signal Sb "0010" Since it can be seen that switching is performed at any one of _{6 6} , 6 ₇ , and 6 ₈ , it can be determined that switching is performed at the X-axis electrode line 6 ₆ . Also, "0100"
Y-axis electrode lines 7 ₃ , 7 ₇ ,
7 ₁₁ , 7 ₁₅ , and the Y-axis electrode line 7 ₁ , 7 ₂ , corresponding to the auxiliary Y-axis electrode line 9 ₁ is determined by the data signal Sd “0001”. Since it can be seen that switching is being performed in any one of the Y-axis electrode lines _7-4 , it can be determined that switching is being performed in the Y-axis electrode line _7-3 .

After the switching position of the matrix switch 14 has been determined in this way, the process goes through the determination process (H) → "shift" process (I) → "output" process (D) →
The program is executed cyclically in the order of "input" process (e) → discrimination process (f) → discrimination process (ch), and
When it is determined as “YES” in the determination process (H),
Furthermore, the program is executed cyclically through the discrimination process (N), the "shift" process (L), the "standby" process (B), and the "output" process (C), and finally the discrimination process.
If (nu) is determined as "YES" (when the scanning signal Sa is shifted to "1000"),
Execution of one subroutine for reading the ON state of matrix switch 14 is completed.

According to the present embodiment described above, the first to fourth signal lines 10a to 10d, 11a to 11d, 1
It is only necessary to provide a total of 16 wires, 2a to 12d and 13a to 13d, which reduces the signal wires from the conventional configuration (if there are 16 X-axis electrode wires and 16 Y-axis electrode wires, a total of 32 signal wires are required in the past). The number can be reduced.
The degree of decrease in the number of signal lines becomes more noticeable as the number of X-axis electrode lines and Y-axis electrode lines increases (in other words, as the number of switch segments of the matrix switch increases). , an example is shown in FIG.

In the above embodiment, the second substrate 2 may have a two-layer structure, and the Y-axis electrode line 7 and the auxiliary X-axis electrode line 8 may be provided on each layer of the substrate.

According to the present invention, as is clear from the above description, in a matrix switch in which an X-axis electrode line and a Y-axis electrode line are orthogonally arranged with a gap in between,
The number of required signal lines can be reduced, thereby simplifying the signal line wiring process, and
It is possible to achieve excellent effects such as reducing the wiring space for the signal lines and eliminating the risk of increasing the overall size.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part, FIG. A plan view showing the arrangement relationship of the axis electrode wire and the auxiliary Y-axis electrode wire, FIG. 4 is a diagram showing the electrical configuration, FIG. 5 is a flowchart for explaining the operation, and FIG. 6 is for explaining the difference from the conventional configuration. This is a diagram for In the figure, 1 is a first substrate, 2 is a second substrate, 3 is a third substrate, 4 and 5 are air gaps, 6 (6 ₁ to 6 ₁₆ ) are X-axis electrode lines, and 7 (7 ₁ to 7 ₁₆ ) is the Y-axis electrode wire, 8
(8 ₁ - 8 ₄ ) are auxiliary Y-axis electrode lines, 9 (9 ₁ - 9 ₄ )
are auxiliary Y-axis electrode lines, 10a to 10d are first signal lines, 11a to 11d are second signal lines, 12a to 1
2d is a third signal line, 13a to 13d are fourth signal lines, and 14 is a matrix switch.

Claims (1)

[Claims] 1 first, second and third substrates arranged in parallel so that there are gaps between them, at least two or more adjacent to each other are flexible; m X-axis electrode lines arranged in parallel to extend in the X-axis direction on the substrate;
n Y-axis electrode lines arranged in parallel to the X-axis electrode line in a perpendicular arrangement on the first substrate or on the first substrate, and the electrode line arrangement on the second substrate. m' wires are arranged in parallel to extend in the X-axis direction on the surface opposite to the surface or on the third substrate, and are formed so as to correspond to a predetermined number of X-axis electrode wires (where m'<m). the auxiliary X-axis electrode wire, and the auxiliary
n' auxiliary Y-axis electrodes (where n'<n) are arranged in parallel so as to be orthogonal to each other through the axial electrode wire and the gap, and are each formed to correspond to a predetermined number of Y-axis electrode wires. and one wire from each group corresponding to the auxiliary X-axis electrode wire, respectively.
By extracting and combining the books one by one, they are divided into a plurality of groups, and each group is connected to a corresponding first signal line, and the Y-axis electrode line is connected to the auxiliary Y-axis electrode line, respectively. By extracting one wire from each corresponding group and combining them, the wires are divided into a plurality of groups, and each group is connected to a corresponding second signal wire, and the auxiliary X-axis electrode wires are connected to each other. A matrix switch characterized in that the auxiliary Y-axis electrode line is connected to a third signal line provided correspondingly to the auxiliary Y-axis electrode line, and the auxiliary Y-axis electrode line is connected to a fourth signal line provided correspondingly.