JPS61173333A - Inputting device - Google Patents

Abstract

PURPOSE:To prevent lowering of transmissivity of light of an inputting device, to reduce the number of parts and to reduce costs by providing a substrate having a matrixlike group X of electrodes and a group Y of electrodes arranged in the direction crossing the above on the same plane with an insulating layer in-between. CONSTITUTION:A group X of electrodes is formed in matrixlike form on the same plane of the substrate 1 of an inputting device through an insulating layer 2a, and a group Y of electrodes is formed in the direction crossing the electrode group X. Leading-out lines X0-X4, Y0-Y3 are formed in a part surrounded by the groups of electrodes avoiding lapping of the groups X, Y of electrodes. Further, an uppermost insulating layer 2b is formed thereon. When contact is made from the layer 2b to a conductive body 3, the capacity C1 between an electrode X3a of the electrode group X and an electrode Y1a of the electrode group Y changes. A signal sent from the electrode Y1a is transmitted to the electrode X3a. Thus, the number of parts of the inputting device is reduced without lowering transmissivity of light of the inputting device, and the cost of the device is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application to which the Invention Pertains> The present invention relates to a small, thin, and transparent input device.

<Prior art> In the conventional X-Y→TRIX type input device, the electrode group Signals were transmitted by contacting the electrode groups. Furthermore, conventional input devices that transmit signals by changing capacitance require at least one signal line for each input section.

<Problems to be Solved by the Invention> The conventional X-4 matrix type input device has the disadvantage that the use of two substrates increases the material cost. When creating a transparent input device using a conventional X-Y matrix type input device, two transparent substrates are used, which reduces the light transmittance and makes it difficult to display objects placed below or display equipment costs. The disadvantage is that the degree of blurring is large.

Furthermore, in the conventional X-Y matrix type input device,
Since input is detected by contact between electrode groups, there is a risk of erroneous input when an object is dropped.

On the other hand, in conventional input devices that use capacitance change, the number of signal lines required is at least the same as the number of input sections, so as the number of input sections increases, electrode routing becomes complicated, and position detection The circuit also had the disadvantage of increasing the number of parts and increasing the cost of parts.

Therefore, an object of the present invention is to reduce material costs by forming an input device using a single substrate, and to improve light transmittance in the case of a transparent input device.

Another purpose of the present invention is to provide a reliable input device that is free from malfunctions and does not receive input except when it is in contact with a conductor. Still another object of the present invention is to form many input sections with fewer electrodes by arranging the electrodes in a matrix, thereby reducing material costs.

Means for Solving Problems〉 The present invention comprises forming an electrode group X and an electrode group Y in a matrix shape on one substrate with an insulating layer interposed therebetween. The electrode group X and the electrode group Y
over the tti pulled out from the top layer through the uppermost insulating layer,
By bringing conductors into contact with each other and changing the capacitance, a signal sent from one of the color group X or the electrode group Y is transmitted to the other, thereby detecting the position.

Effect> The equivalent circuit of the input section of the first embodiment of the first embodiment, which consists of an electrode group and an electrode group Y formed in a matrix with an insulating layer interposed therebetween, is as shown in FIG. 1(b). This is [21 group x”
5 lines (xo - xa) b t color group Y dE
In the example of 4 lines (Y, %Y3), each intersecting part of the electrode group has a capacitance fGo of approximately the same value.The present invention aims at changing this capacitance Cot-cT↓Thus, signal transmission is improved. In other words, in FIG. 1, there are an additional (5×4) input units. The structure of the input section of the input device of the present invention is shown in FIG. 2. This is the intersection of the electrode x3 of the electrode group X and the electrode Y1 of the electrode group Y in FIG. 1st
The capacitance Co in the figure is a combination of the capacitance C1 and the capacitance Cmu. Now, if the conductor 8 contacts the electrode x3α and the electrode Yla through the insulating layer 2, as shown in FIG.
A capacitor C3 is formed between fYxα, and the signal Big from the electrode X3α passes through the equivalent circuit shown in FIG.
The signal Big 1 is detected from sα.

When conductor 3 is not in contact, signal B from electrode x3α
igA is connected from electrode Y1α to B via the equivalent circuit shown in Figure 2.
Detected as igA' * C2a Cs >> C1
Therefore, the voltage level of the signal is B i g A ”)
Bs gA), and the detection criterion level is signal Big
By setting between A1 and the signals 9i and AI, contact/non-contact of the conductor, that is, presence or absence of input can be detected.

<Embodiment> FIG. 1 shows a first embodiment of the input device of the present invention, which has 20 input sections (4 lines x 5 lines).

Figure wXd shows an example of the block configuration of an input detection circuit using the first embodiment of the present invention. The operation of this configuration example will be explained below. The 8-bit X address from the counter circuit section 5 is converted into the signal shown in FIG. 5 (α) by the decoder circuit section 6 and applied to the corresponding electrode group X. Further, according to the 2-bit X address, the switch of the circuit connected to the electrode group Y of the switch circuit section 7 is set to the frontage N of the level 111 at the timing shown in FIG. 5(6). If point P of the input device T is now touched with a conductor, a signal with the timing shown in FIG. 6(c) will be observed at part B. Using the signal of this B section, the latch circuit section 9 sets the X address,
Holds the address and outputs it as data. At this time, the coordinates of the two points are (XIX(2), X 1 (2)).

In the first embodiment shown in FIG.
The larger the ratio c'r7to of a #C,,CM,Cm), the larger the ratio of the signal a4, AI and the signal 84gA'', making detection easier.As a method for increasing CT/co, the sixth method This shows an example of the figure, which is Figure 2G)
Insulating layer 2C is provided only on part A of , and in the Z-Zl cross section, insulation 2 consists of insulating layer 2b as shown in FIG. 6(c), and the insulating layer 2a in FIG. 2(6) disappears. C
T/C0 becomes larger and detection becomes easier.

FIG. 7 shows a second embodiment of the input section, in which the electrodes drawn out from the electrode group X and the electrode group Y are each shaped like two combs, forming an input section with higher independence.

FIG. 8 shows an eighth embodiment of the input section, in which the portions from 1 to 4 of the electrodes drawn out from the electrode group X and the electrode group Y serve as the input section. In this pattern, each of the four input sections in Kl~ is highly independent, and reliable input without malfunction can be performed.

FIG. 9 shows first and second embodiments in which the input device of the present invention is integrated with a liquid crystal display, and in the first embodiment (integrated) in FIG. A layer of transparent electrode group I is formed on top of the upper polarizing plate 2.

an insulating layer 2a thereon, a layer 31 of a transparent electrode group Y thereon,
Furthermore, an insulating layer 2b is formed thereon.

In the second embodiment of integration shown in FIG. 9(b), integration with a G-H type liquid crystal display 41 is performed. Is this the upper glass plate 13 or P? In the case of P, a layer of transparent IE group X is formed on the upper plastic plate 13, and an insulating layer 2a is formed on it.
, a transparent electrode group Y @ 31 is formed thereon, and an insulating layer 2bfc is further formed thereon. FIG. 9(a) shows an input device of the present invention in which the transparent substrate is composed of the upper polarizing plate 12 of the liquid crystal display 4X, and FIG. Upper glass plate or P of display unit 4
In the case of the UFF, the upper plastic plate 13 constitutes a compact input/output device that integrates an input device and a display device. FIG. 9(C) shows a transparent Ti group X (7) on the transparent substrate 1 on the upper polarizing plate 12 of the liquid crystal display 42.
r#rI32, insulating layer 2α.

This is an eighth embodiment of integration in which the input device of the present invention is mounted, in which a layer 31 of a transparent electrode group Y and an insulating layer 2b are formed. Furthermore, by configuring the transparent substrate 1 with a plastic plate, the input device of the present invention can be configured by using the polarizing plate 12
It is also possible to laminate it.

Although a liquid crystal display is taken up as an example in FIG. 9, the input device of the present invention can also be applied to other display devices such as CRT, IC, etc.
D, plasma display, fluorescent display tube, IItL, etc., can be easily integrated by constructing the transparent substrate of the input device of the present invention (also serving as '''t). In such cases, it is possible to form the input Wt on the upper electrode substrate of the liquid crystal panel or the upper light body itself, or to form the input substrate separately and attach it to the panel with a transparent adhesive, etc. In the case of a CRT' or the like, the front glass or plastic plate may be made in this manner.

<Effects of the Invention> As seen above, the present invention reduces the cost of materials by forming the electrode group X and the electrode group Y on one substrate with an insulating layer interposed therebetween. When the invention is constructed, there is an advantage that the reduction in light transmittance is suppressed and the display object placed below is not blurred. Furthermore, since the electrode groups are formed in a matrix, the number of signal lines can be reduced relative to the number of input sections, making it possible to reduce the cost of one circuit component and further increase the density of the input sections. Furthermore, since there are no mechanically moving parts, it is possible to perform stable input without erroneous input due to things such as falling objects.

[Brief explanation of the drawing]

Figures (a) and (b) respectively show a plan view and an equivalent circuit of an embodiment of the input device of the present invention. Figures 2 (α) to (nu) show an enlarged view (a) and a sectional view (b) <c> of the input part, and an equivalent circuit (b) of the input part in non-contact mode. Figure 8 (cc) ( b) is also the cross section of the input at the time of contact (
a) and an equivalent circuit (b) are shown. FIG. 4 shows an example of the configuration of an input detection circuit using the first embodiment of the present invention. FIGS. 5&OL) to (c) are signal timing diagrams of the input device of the present invention. FIGS. 60) to 6(c) show another embodiment of the input section. FIG. 7 shows another embodiment of the input section. FIG. 8 shows a plan view and a sectional view of another embodiment of the intersection. FIGS. 9(α) to (c) respectively show Example 1 of a display/input device integrating an input device and a liquid crystal display according to the present invention.
Substrate 2... Insulating layer X, Y... xh group or more

Claims (1)

[Claims] An input device is configured using a substrate having an electrode group X formed in a matrix on the same surface with an insulating layer interposed therebetween and an electrode group Y in a direction crossing the electrode group, and the input device is surrounded by the electrode group X and the electrode group Y. The electrodes from the electrode group An X-Y matrix type input device characterized by detecting a position by transmitting a signal sent from one of the electrode group X and the electrode group Y to the other.