JPS6184728A - Through-vision finger touch input device - Google Patents

Abstract

PURPOSE:To minimize the error of a detecting position with high reliability by making a finger tip touch the crossover of respective electrodes and detecting the coordinates position by the welding of fine electric current through this. CONSTITUTION:On a display surface 1 of CRT, etc., electrodes X0-X2, which consist of a film-shaped straight-line-shaped transparent conductive material as the first electrode, are installed mutually in parallel at a constant pitch PX, and the second electrodes Y0-Y2, which intersect orthogonally, are installed by the above-mentioned same manner. Both electrodes X and Y are exposed at a surface side by a transparent film-shaped insulating material 2 tightly close to the display surface, and preserved in a single body. The insulating material 2 is composed of filling the insulating material 2 in a concave part 3 formed at the intersecting position between both electrodes X and Y. Thus, when the finger, in which the conductive material is stuck at the outer surface of the tip and the finger sack is not fitted, is made to touch, the section between both electrodes is bridged and when a scanning signal is impressed, fine electric current is passed. Thus, a coordinates position touched with the finger tip can be detected.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides an input instruction for r9 information when a fingertip touches a predetermined coordinate position on a display surface of a CRT display device or the like. This relates to an input device that provides input information.

[Conventional technology]

Such input devices are used in CRT display devices attached to various data processing devices such as electronic computers and control devices.
Published by Nikkei McGraw-Hill on June 8, 2015, pages 122 to 137, "Perspective finger touch input device with coordinate detection plane 7 superimposed on display screen".
A group of electrodes made of aluminum are provided with mutually orthogonal transparent conductors on the display surface of the CRT, and a gap is provided between the opposite surfaces, so that the LiM conductor can be connected by the touch of a finger. Means for contacting Soma Hakuma and detecting continuity due to this contact, and h, CR
Multiple light beams from the sides mutually perpendicular to the surface of T?
At the same time as projecting the light, let's assume that the Tanimoto beam is received on the opposite side, and the light is blocked by the fingertip. Detect and coordinate position? The means to find out is commonly used.

[Problem that the invention seeks to solve]

However, in the former method, the transparent conductive material film that constitutes the entire electrode group has poor restoring force, and there is a risk that the cows will be permanently in contact with each other, while in the latter method,
Although the surface of a CRT is curved, the light beam travels in a straight line, and the distance between the CRT surface and the original beam is large in the areas between the surfaces of the CRT, making it difficult to touch the screen based on the display on the CRT K. The difference between the position and the coordinate detection position due to the shielding of the light beam causes disadvantages such as a large difference ρ, and an error occurs in the detection of the information input position.

The present invention aims to fundamentally solve all of the drawbacks of the conventional technology, and provides a transparent finger taper input device that is highly reliable and extremely effective and free from detection errors. Ruru.

Is this the problem? Means for solving the problem] Therefore, non-invention is constituted by the following means.

In other words, a plurality of mutually parallel first poles made of a line-shaped transparent conductive material, and a plurality of mutually parallel first poles made of a plane line-shaped transparent conductive material intersecting these. The second electrode is provided to be exposed on the display surface, and a transparent insulating material is interposed to completely insulate each electrode by providing a predetermined opposing interval between each electrode at each intersection of each electrode, and A detection circuit that detects the smiling current flowing through each intersection as the coordinate position of the intersection? I have set it up.

[For production]

Therefore, if you touch the intersection of each electrode with your fingertip, the flow of smile current through this will be detected as the coordinate position,
In response to this, information is input by touching the finger 52.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

FIG. 1 is a positive 111 diagram, and on the display surface 1 of P, C'RT, etc., electrodes xo-X2 made of a film-like and linear transparent conductive material are arranged parallel to each other as the first electrode, and The display surface 1 is provided with a certain pinch Px, and a similar electrode Yo=Y2 as a second weight is provided with a certain pinch Py intersecting with these.
A transparent film-like insulating material 2 that tightly adheres to the surface exposes the surface and holds it together.

Figure 2 shows each electrode Xo = Xs and Y in Figure 1.
An enlarged sectional view showing each intersection with O-Y2, ay-
There is a predetermined opposing distance d between the metal Xo and Y2.
In this example, a recess 3 is formed at the intersection of the electric currents mXo, and the electrode Y2 is located on the surface side of the recess 3, and the electrodes x, . y
2 The insulating material 2 is filled into the recess 3 assuming that the surface of the insulating material 2 is flat and flush.

Figure 3 (text, circuit diagram of detection circuit, electrodes X0 to X]
]? Resistor R? The multiplexer MPX On the other hand, electrode Y.-Y
n are also connected to a common potential through resistors R, and these are connected to a multiplexer MPXy k
A voltage V is applied to each individual via.

Further, the multiplexers MPXx and MPXV are individually controlled by a control unit C0NT such as a microprocessor, and as shown in FIG. 4 showing the waveforms of each part in FIG. 3, the multiplexer MPX3' has a pulse width t1 and a time difference t2. Due to the internal switch
Since Syn k is turned on sequentially and repeatedly, the voltage V is applied to the electrodes yo-yn in response to the scanning signals (0) to (
n) sequentially and iteratively.

・On the other hand, the multiplexer MPXX outputs the scanning signal (
Each switch Sxo to Sxn is sequentially turned on 701 times during each period of cycle t Ll of one cycle of 0) to (n), and for example, as shown in FIG. To the intersection of
When 0 is brought into contact with the contact resistance of the conductive material 8, the contact resistance of the conductive material 8 is
When a scanning signal is applied to the n1 electric node Y3, a current flows between the electrodes Y3 and Y3, and the resulting voltage at the terminals of the resistor R is passed through the switch SX3 of the multiplexer MPXx. , is applied to one input of the comparator CP.

Then, the comparator CP produces a comparison output, and in order to send it out as the total detection power OUT, the multiplexer Mpxyl ? vi
The order of the switches PXx that are turned on is determined, and the coordinate position touched by the fingertip 10 can be detected using ζ9.

However, if the finger holder 9 is used, the electrode surface is not contaminated and can be effectively achieved, but even if the finger holder 9 is not used, the same result can be obtained due to the skin resistance.

Note that the detection force OUT is given to the control unit C0NT, where the above-mentioned detection is performed and information input instruction t; coordinate signals DSX, DS indicating the given coordinate position are sent.
7 to a data processing device (not shown in the figure).

Therefore, each electrode Xo −Xn, Yo” Yn
Each electrode X according to the ejection n company of the coordinate position indicated by.

~Xn+Yo-Yn! W, and pitch Px.

By determining Py k and determining the electrode facing interval cl at each intersection according to the width of the contact area of the fingertip 10, reliable finger touch detection and finger touch coordinate position detection can be performed with sufficient accuracy. can.

In addition, since each electrode is integrated, it is highly reliable, and even if the display surface 1 is curved, each electrode is film-like, so it will stick closely to the display surface 1! j, no error sound occurs between the display on a CRT or the like and the finger touch detection position.

In addition, since the surface of each electrode is flat, it is difficult for dirt, dust, etc. to adhere to it, and the insulation caused by the insulation material (2V) is less likely to deteriorate.

In addition, u to each electrode Xo ”Xn, Yo ”Yn
, ITO (Indum Tin Oxide, ), etc. may be used.

However, not only a cane or a CRT but also various display surfaces may be used as the display surface 1, and the electrodes Xo = Xn and Yo
= Yn The same effect can be obtained by intersecting Xo '' Xn at a predetermined angle, and the electrode Xo '' Xn is directly applied to the display surface 1 .

Y6=Ynf may be formed and the insulating material 2 may be entirely interposed therewith, and in FIG. 3, the relationship between the electrodes Xo" Various modifications are possible, such as the comparator CP can all be replaced with other equivalent components.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, electrical conduction is achieved through the fingertips without using mechanical displacement. Since the detection is highly reliable and there is no error in the detected coordinate position #, a remarkable effect can be obtained as a finger-touch manual means using various indicators &.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is an enlarged sectional view of an electrode intersection, Fig. 3 is a circuit diagram of a detection circuit,
Is Figure 4 the waveform of the valley in Figure 3? The figure shown in FIG. 5 is a front view of the state in which the fingertips are in contact with each other. 1... Display surface, 2... Insulating material, 3... Concave portion, Xo = Xn... Electrode (first electrode), Yo
-Yn 5eas electrode (second electrode), Px. Py・@φ-pitch, W... Gravel width, da-ψ・couple interval, MPXX 2MPXy...Multiplexer, CP...Comparator, C0NT...Control unit.

Claims (1)

[Claims] a plurality of mutually parallel first electrodes made of linear transparent conductive material provided exposed on the display surface; and a linear electrode provided on the display surface so as to intersect with each of the first electrodes and exposed. a plurality of second electrodes parallel to each other made of a transparent conductive material, interposed at each intersection of each of the second electrodes and each of the first electrodes, and with a predetermined facing interval provided between each of the electrodes; A see-through type finger touch input device comprising: a transparent insulating material that insulates between electrodes; and a detection circuit that detects smile currents flowing through each intersection of each of the electrodes as a coordinate position of the intersection.