JPS60233726A - Input and output device - Google Patents

Abstract

PURPOSE:To simplify the processing of an input/output signal line with decrease of the number of key input/output signals, by laminating transparent keyboards and distributing each electrode of input and output blocks to each layer of the lamination of transparent keyboards. CONSTITUTION:The upper surface sides of plural transparent keyboards set on the surface of a display device LCD are pressed with a pen, etc. Then an upper transparent substrate 1 has flexion to give a contact between either one of transparent electrodes x1-x4 for block output signal provided on the lower surface side of the substrate 1 and either one of transparent electrodes y1-y4 for block input signal provided on the upper surface side of an intermediate transparent substrate 2. Then either one of blocks (a)- (h) is detected. In this case, the substrate 2 also has flexion to produce a contact between either one of transparent x11-x14 for output signal provided on the lower surface side of the substrate 2 and either one of electrodes y11-y17 for input signal formed on the upper surface side of a lower transparent substrate 3. Thus a key input is detected. In such a way, a key matrix is divded into blocks. The positions of divided blocks are first detected. Then the key input is carried out in response to the characters displayed on a display device LCD by detecting the positions of the blocks with an input/output signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an input/output device in which input and output are integrated by overlapping a transparent keypad portion on the surface of a display.

[Prior art]

Conventionally, a display transparent keyboard that integrates input and output allows input by overlapping a transparent keyboard section on the display surface and pressing down on the top surface of the board section from above the displayed characters with your fingers, etc. The number of key matrices required to perform key input corresponding to one pixel of a device or one character of a display character has become extremely large, and along with this, the number of key input signal lines and key output signal lines that form the key matrix has also increased. As the number of key output signal lines increases, processing of these key output signal lines becomes complicated and difficult, so the key matrix is divided into two or more blocks,
A method of reducing the number of signal lines by providing block electrodes is known.

Also, in such input/output devices, input and output.

Each electrode of a block is normally arranged on the same plane of a double-sided printed board using through holes, but since a transparent keyboard is constructed by forming transparent electrodes on a transparent film or glass substrate, The problem is that it is difficult to form through holes like in printed boards.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems, and therefore a multi-layer transparent keyboard is constructed by stacking transparent keyboards one above the other, and each electrode of the input and output blocks is arranged separately in each layer to form input/output signal lines. By trying to reduce
The purpose is to solve these problems.

〔Example〕

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

First, I will explain the configuration.

FIG. 1 is a perspective view of an input/output device in which a multilayer transparent keyboard is disposed on the top surface of a display, and FIG. 2 is a longitudinal sectional view of FIG. 1.

The LCD is a liquid crystal display, and 1, 2.3 are upper, middle, and lower transparent substrates made of film, glass, etc., and the lower surface of the upper transparent substrate 1 is used for plotter output signals that divide the key matrix into blocks. The transparent electrodes x1+X, and the block input signal transparent electrodes y, to y4
However, on the bottom surface, there is a transparent electrode for block output signal: e
14 are arranged in two rows, and furthermore, on the upper surface of the lower transparent substrate 3,
Transparent electrode for input signal of key matrix y, 1~3'lW
are formed in four rows, and the upper transparent substrate 1 and the middle transparent substrate 2 are bonded to each other by a spacer S1, and the middle transparent substrate 2 and the lower transparent substrate 3 are bonded to each other by a spacer S2. A second layer is formed, and a multilayer transparent keyboard A is constituted by these layers.

FIG. 3 is a wiring diagram in which the key matrix configured as described above is divided into a plurality of blocks and key output signals are wired. Conventionally, in order to form this key matrix in a normal state, the output signals 8 signals and 28 input signals are required, resulting in a total of 36 input/output signals. However, in the present invention, the eight output signals of this key matrix are divided into two, and the output signals are arranged in two rows of four, and the output signal transparent electrodes 3j1. ～-” form 14. And,
The 28 input signals are divided into four parts, and seven parts are arranged in four rows to form input signal transparent electrodes fftt to ysy.

Therefore, this key matrix is divided into eight blocks a to h. As a result, 6 new pull input/output signals are added.
Although this is added, compared to the 36 input/output signals required to form a normal key matrix, by dividing the input/output signals into blocks, the number of input/output signals is reduced to 17, less than half. Processing becomes extremely simple.

Next, the effect will be described.

In order to input the characters displayed on the liquid crystal display LCD shown in FIG. 1 is deflected, and one of the block output signal transparent electrodes zl t 1 on the lower surface of the substrate 1 comes into contact with any of the block input signal transparent electrodes y8 to y on the upper surface of the middle transparent substrate 2, and the block is a-h
one of them is detected. Then, as the upper transparent substrate 1 comes into contact with the transparent substrate 2 during bending, the middle transparent substrate 2
Similarly, the transparent electrode for the output signal on the lower surface of the deflection "II ~ Machi,
and the input/output signal wire iIM on the 31st surface of the lower transparent substrate.
A key force is detected when either y* I" 3/ t r contacts. In this way, the key matrix is divided into blocks, and first, the position t of the divided block is detected,
By detecting the position in this block using input/output signals, keystrokes corresponding to characters etc. displayed on the liquid crystal display (LCD) are performed.

〔Effect of the invention〕

As described above, according to the present invention, a transparent keyboard for pull input/output signals is formed that divides a key matrix into a plurality of blocks, and furthermore, keys for arranging key output signals in parallel according to each block are formed. Since we have provided an input/output device in which a transparent keyboard for human output signals is formed and both are laminated to form a multi-layer transparent keyboard, by mounting it on the top surface of a liquid crystal display, one pixel of the display
Alternatively, the keys corresponding to the displayed characters can be manually operated, the number of key output signals can be significantly reduced, and the processing of the human output signal lines can be simplified and facilitated.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the multi-layer transparent keyboard of the present invention mounted on a liquid crystal display, Fig. 2 is a longitudinal sectional view of Fig. 1, and Fig. 3 shows a key matrix divided into a plurality of blocks. FIG. 611 is a diagram illustrating wiring of key person output signals. L'QD...Liquid crystal display 1...Top transparent substrate 2...Middle transparent substrate 3...Bottom transparent Substrate SL, S2... Spacer Figure 2 Figure 3

Claims (1)

[Scope of Claims] (11. An input/output device characterized in that a display transparent keyboard having a transparent keyboard portion on the upper surface of a display device is formed by stacking the transparent keyboards vertically to form a layered transparent keyboard. (2 ) A patent claim characterized in that the multiple transparent keyboard sequentially divides the key matrix formed in the first layer into blocks, and performs block division one after another on the next transparent key mate to input the key matrix. The input/output device according to item 1 of the scope.