JPS59154533A - Key input device - Google Patents

Abstract

PURPOSE:To realize a simple, inexpensive detecting circuit by connecting X and Y-axial lines mutually through resistors and specifying a pressed key on the basis of variation in resistance value of the resistors. CONSTITUTION:Plural X-axial electrodes 1 are connected mutually through 100KOMEGA resistors 7 and one terminal of them is coupled with an A/D converter 9. Then Y-axial electrodes 2 are connected mutually through 1KOMEGA resistors 8 and one terminal of them is grounded. For example, when 100 electrodes each as electrodes 1 and 2 are used, 100 intersections are formed in total. Namely, 100 kinds of resistance value are inputted to the A/D converter 9 by pressing the respective intersections. The input resistance values digitized by the processing of the A/D converter 9 so that high-order digits 100-1,000KOMEGA range in the X- axial direction and low-order digits 1-99KOMEGA range in the Y-axial direction. Consequently, a pressed intersection on the matrix is detected.

Description

Detailed Description of the Invention [Technical Field] The present invention involves aligning a group of lines in the X-axis direction and a group of lines in the Y-axis direction, and electrically detecting short-circuited points at intersections formed by these line groups. (configured to do so)
l) It concerns Sokuska type key human power devices.

<Prior art> 1-Matrix type key manual device f'! teeth,
For example, it is used as a handwriting input device for personal computers, etc., and as shown in Figure 1, this type of key input device that has been proposed so far has a sheet with a line 1 in the X-axis direction and a sheet in the Y-axis direction. The sheets having lines 2 formed thereon are arranged facing each other with a spacer 3 in between, and
An input circuit 4 is connected to the input circuit 4, and an output circuit 5 is connected to each Y-axis input 2.
The circuit is configured such that the corresponding input circuit and output circuit are connected via the short-circuited intersection, and as shown in FIG.
The two sheets 1 and 2 are pasted together via a spacer, and the X-direction detection electrode 3 is connected to the X11QIIAA) conversion circuit 5 and the Y-direction detection electrode 4 is connected to the y@AΔ) conversion circuit 6, respectively. However, in the former case, the number of input/output circuits must be arranged corresponding to each line, resulting in a very large number of circuits, and in the latter case, the obtained resistance value varies depending on the distance. Since it is not proportional, a separate arithmetic circuit for correction is required, and at the same time, a large number of y detection circuits are also required.
There are 7 drawbacks.

〈In view of this, t+sF,
We aim to provide a key human-powered device that weighs 1 loaf and has a detection circuit that is simple and inexpensive. The present invention will now be described in detail with reference to FIG. 3, which is a circuit diagram of a key person jJ device 'a'T according to the present invention.

This key human-powered device R is made with foil.
A plurality of electrodes 1 in the X-axis force direction are formed by applying a gold agate 4' to the electrodes 1.
The electrodes 2 are arranged in the same shape as the electrodes 2 in the opposite direction.

The electrodes 1 and 2 are pasted together through 8 saws, and the intersection of the electrodes 1 and 2 in the x y I+l direction is pressed. (The configuration up to this point is the same as the conventional one, but the key person of the present invention is the device shape.) Between each electrode in the CX-axis direction That's OOOOO
Connected by KΩO resistor 7, one end of which is connected to Δ7/I) converter 9 &iC, and V between each electrode in Y-axis J) direction.
-'th It is connected with the resistor 8 of 1KK'1, and the -'; 77 is grounded as shown in the figure.
．． 8 klt resistance resistor base toss formed by full screen printing cloth, Hy < , 71 rows. , 111 (configuration of (/
(Now, the electrodes 1.2 in the X and y axis directions are Jl sot'
1. I O;T by -CAZt, +(Shi, Word 11
(10 intersections (key contacts) are formed -y:/ by pressing L1- at each intersection I OI K, Q from I OI
OK, Q -4T + 00, the resistance value of it is introduced into the AA) converter 9 1, this Ad, + introduced from the processing I/C of the converter +-, the resistance value is 1 , toe digit (100KΩ to -1 (l OOKΩ) or X 1lill
L force direction, lower A 8'I digit (to 1 teaching!, ), ~99I (Ω) can be converted into the backward value as Y suke no direction, and Koneni J: Pressed I'1/this intersection on Limatrinox. Detected. For example, if the intersection at the bottom right corner in the figure is pressed, 101 KΩ is applied to the transducer 9.
The resistance value is introduced and the digital value of 1r0101J is
Output. According to this value, both the toy ☆ digit and the lower digit are "1", so the intersection formed by the electrode 1.2 in the first X Y iQb force direction is pressed and (31- is detected). 1, :7 Also, if the intersection at the leftmost j end in the figure is pressed 7, then Δ, /I) The output J of the converter 9 is r l OT Oj
It is possible to detect that the intersection formed by the 10th electrode in the direction of the X'-axis force, 2, has been crossed. Na - ↓, ・, (Δ/I in the second A column) converter 9 (L) output as lO''lI (1 in number)
-1, etc.), but you can also use binary numbers.

Effect of the present invention as shown in 1.
Connect the inputs in the X-axis direction with the first resistor.11. And between each line in the Y-axis direction fy −'c t+
Part 11 Connect with the second resistor (7)
The change in the resistance value of f ←(-) Since we have made it possible to identify the pressed key based on the change in resistance value, the detection circuit is extremely (
Part 1 is simplified and is very cheap.
C- can provide human-powered equipment 5.

[Brief explanation of the drawing]

Figures 1 and 2 are configuration diagrams of conventional key human power equipment;
FIG. 3 is a configuration diagram of the key manpower device according to the present invention.

Claims (1)

[Claims] 1. In a mudsock type key manual device, each line in the X-axis direction is connected with a first resistor, and each line in the Y-axis direction is connected with a second resistor,
A key press device is characterized in that it is configured to be able to identify a pressed key based on a change in resistance value caused by a resistor.