JPH11296289A - Position input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturized position input device. SOLUTION: Connection pieces 41 to 44 are formed by cutting edges of a lower panel 14 of a position detecting board 55 and connecting electrodes 45 to 48 derived from electrodes arranged on respective detection films of upper and lower panels 13, 14 are formed on the connection pieces 41 to 44. Respective connection pieces 41 to 44 are led to the circuit parts mounting surface through notches 57 formed on the edges of a circuit board 56 on which the board 55 is mounted and connected to electrodes formed on the circuit parts mounting surface 56a. Consequently tails projectively formed on a position detection board as connection parts of the circuit boards in a conventional method are not required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position input device used for inputting a coordinate position by pressing an arbitrary position on an operation surface with a writing tool or a finger.

[0002]

2. Description of the Related Art In general, this type of position input device is composed of a position detecting board to be pressed and a circuit board for controlling the driving of the position detecting board. 7 and 8 schematically show the configuration of a conventional position input device.
FIG. 9 shows a position detection board 12 in the position input device 11.
FIG.

The position detecting board 12 has a structure in which an upper panel 13 and a lower panel 14 are arranged to face each other. In this example, the upper panel 13 and the lower panel 14 are square, and the upper panel 13 has a tail 15. Are formed integrally with each other. As shown in FIG. 9, rectangular detection films 16 and 17 are respectively formed on opposing surfaces of the upper panel 13 and the lower panel 14, and are parallel to the Y axis of the detection film 16 of the upper panel 13. Electrodes 18 and 19 are formed on two sides, while electrodes 21 and 22 are formed on two sides of the detection film 17 of the lower panel 14 parallel to the X axis.

[0004] The connection electrodes 23 to
26 are arranged and formed, and the electrodes 18 of the upper panel 13,
19 is connected to the connection electrodes 24 and 25 via the wiring pattern 27 as shown in the figure. Relay electrodes 28 and 29 extending from the electrodes 21 and 22 are formed on the edge of the lower panel 14, while a connection electrode is provided on the upper panel 13 at a position facing the relay electrodes 28 and 29. Relay electrodes 31 and 32 connected to 23 and 26, respectively, are formed. The relay electrodes 28 and 31 and 29 and 32 are connected by, for example, a conductive adhesive, whereby the electrodes 21 and 22 of the lower panel 14 are connected to the connection electrodes 23 provided on the tail 15 of the upper panel 13.
26.

[0005] The upper panel 13 is made of a flexible film such as PET or polycarbonate film, and the detection films 16 and 17 are made of a resistor film such as a carbon film. Although not shown in the figure, the two detection films 16 and 17 are kept close to each other while being kept in a predetermined separated state by a frame-shaped spacer, a dot spacer, or the like.

The position detecting board 1 having the above structure
2 is mounted on a surface 33b of the circuit board 33 opposite to the circuit component mounting surface 33a, with the lower panel 14 side facing thereto. Further, the tail 15 is bent by 180 ° so that the front end thereof is positioned on the circuit component mounting surface 33a of the circuit board 33, and the connection electrodes 23 to 26 are connected to the circuit component mounting surface 33a.
The upper electrodes 34 to 37 are connected to the electric circuit.

The connection electrodes 23 to 26 and the electrodes 34 to 37 are connected using, for example, a conductive adhesive or a connector. 7 and 8 show a case where a conductive adhesive is used. The position detection board 12 and the circuit board 33 are bonded and fixed to each other using, for example, a double-sided tape. In the position input device 11 having the above-described configuration, when an arbitrary position on the upper surface of the position detection substrate 12, that is, the operation surface 12 a on the upper surface of the upper panel 13 is pressed by, for example, a pen or the like, the upper panel is pressed at the pressed point. At this point, the detection films 16 and 17 come into contact with each other. At this time, a constant voltage (for example, 5
When V) is applied, the position of the contact point in the X direction from the electrode 21 (or 22) can be obtained as a voltage value proportional to the position. On the other hand, when a constant voltage is applied between the electrodes 21 and 22, the position of the contact point in the Y direction can be obtained as a voltage value from the electrode 18 (or 19), and the X and Y coordinates of the pressing input position can be obtained from these voltage values. Is obtained.

[0008]

However, in the above-described position input device, for example, the downsizing of the device into which the position input device is incorporated is required to be downsized. In order to obtain a desired size, with respect to the position detection substrate 12 whose size is determined,
The circuit board 33 is configured so that its size does not become larger than the position detection board 12 as shown in FIGS.

However, in the conventional position input device 11, the tail 15 is provided for electrically connecting the position detection board 12 and the circuit board 33, and the projection of the tail 15 is reduced in size. It was in the way.
In addition, with the miniaturization, the radius of curvature of the tail 15 must be reduced, and the restoring force increases. Accordingly, stress is applied to the upper panel 13 following the tail 15, that is, the stress is applied to the detection film 16. In addition, it was a cause of poor performance. In addition, the circuit board 33
The connection work with was also difficult.

In view of these problems, an object of the present invention is to provide a position input device which does not require a tail, can eliminate the influence of bending stress, and can be made compact.

[0011]

According to the first aspect of the present invention, an upper panel and a lower panel each having a detection film on one surface thereof are provided with a position detection substrate on which the detection films are disposed so as to face each other; It consists of a circuit board that drives the position detection board, and on the surface opposite to the circuit component mounting surface of the circuit board,
In the position input device in which the position detection substrate is mounted with the lower panel side facing and mounted, a connection piece is cut out at an edge of the lower panel, and the surface of the connection piece facing the upper panel is
A connection electrode derived from an electrode provided on each of the detection films is formed, and a connection piece on which the connection electrode is formed passes through a notch formed at an edge of the circuit board, and a circuit component mounting surface. And the electrodes on the circuit component mounting surface are connected to the connection electrodes.

According to the second aspect of the present invention, an upper panel and a lower panel each having a detection film on one surface are provided with a position detection substrate arranged such that the detection films are closely opposed to each other, and the position detection substrate is driven. In a position input device comprising a circuit board to be mounted and a position detection board mounted on the surface opposite to the circuit component mounting surface of the circuit board with the lower panel side facing thereto, the electrodes arranged on the respective detection films Is formed on the edge of the detection film forming surface of the upper panel,
A notch is formed in a portion of the lower panel facing the connection electrode, and the electrode formed by through-hole connection on the surface opposite to the circuit component mounting surface of the circuit board and the connection electrode are formed by the notch. The parts are connected in opposition.

According to the third aspect of the present invention, an upper panel and a lower panel each having a detection film on one surface thereof are provided with a position detection substrate arranged such that the detection films are closely opposed to each other, and the position detection substrate is driven. In a position input device in which a position detection board is mounted with the lower panel side facing the other side of the circuit board, a connection piece is cut into an edge of the lower panel. A connection piece formed and formed on a surface of the connection piece facing the upper panel, a connection electrode derived from an electrode provided on the detection film of the lower panel, and a connection electrode formed on the lower panel. Is led out to the circuit component mounting surface side through a notch formed at the edge of the circuit board, the electrode on the circuit component mounting surface is connected to the connection electrode of the lower panel, and the detection film of the upper panel is From the electrodes The output connection electrode is formed on the edge of the detection film forming surface of the upper panel, and a cutout is formed in a portion of the lower panel facing the connection electrode of the upper panel, and the cutout is formed on the circuit component mounting surface of the circuit board. The electrode formed through-hole connection on the opposite surface and the connection electrode of the upper panel are connected to each other at the cutout portion of the lower panel.

[0014]

Embodiments of the present invention will be described with reference to the accompanying drawings. Parts corresponding to those in FIGS. 7 to 9 are denoted by the same reference numerals, and description thereof is omitted. 1 and 2 show an embodiment of the first aspect of the present invention. In this example, the lower panel 14 is made of a flexible film such as PET or polycarbonate film,
A connection piece 4 extending in the Y-axis direction and having a strip shape is provided at the edge thereof.
Notches 1 to 44 are formed. The connection piece 41 is formed by being cut from substantially the center of one side 14a parallel to the Y axis of the lower panel 14 and then cut in the Y axis direction, that is, toward the side 14b so as to form an L shape. The center side of 14a is a free end. The connection piece 44 is formed on the other side 14 c parallel to the Y axis so as to be symmetrical with the connection piece 41 with respect to the center of the lower panel 14.

The connecting piece 42 is cut from the side 14d on the extension of the connecting piece 41, and the side 14d side is a free end. Similarly, the connection piece 43 is formed on the extension of the connection piece 44, and its free end is on the side 14b side. Connection electrodes 45 to 48 are respectively formed on the surfaces of the connection pieces 41 to 44 facing the upper panel 13. The connection electrodes 45 and 48 are respectively derived from the electrodes 21 and 22. The connection electrodes 46 and 47 are formed between the connection pieces 41 and 42 and between the connection pieces 43 and 44, respectively. 52.

The relay electrodes 51, 5 on the upper panel 13
The relay electrodes 53 and 54 connected to the electrodes 18 and 19, respectively, are formed at positions opposing the electrodes 2. The relay electrodes 51 and 53 and the relay electrodes 52 and 54 are respectively connected by, for example, a conductive adhesive, whereby the electrodes 18 and 19 are led out to the connection electrodes 46 and 47, respectively. The circuit board 5 on which the position detection board 55 having the above configuration is mounted
6, a notch 57 is formed at a position facing the base end side of each of the connection pieces 41 to 44, and a notch 57 is formed adjacent to the notch 57 on the circuit component mounting surface 56a. Electrodes 61 to 64 wired in the circuit are formed.

The connection between the position detecting board 55 and the circuit board 56 is made by the opposite side 56
b, the position detection board 55 is mounted and fixed in the same manner as in the related art, and the connection pieces 41 to 44 are bent, led out to the circuit component mounting surface 56a side through the notch 57, and the connection electrodes 45 to 48 respectively correspond. This is performed by connecting to the electrodes 61 to 64. The connection is made using, for example, a conductive adhesive.
In addition, you may make it connect using a connector.

As described above, according to the configuration shown in FIGS. 1 and 2, the electric connection between the position detection board 55 and the circuit board 56 can be performed without providing the tail 15 unlike the conventional case. . In the configuration shown in FIGS. 1 and 2, the upper panel 13 and the lower panel 14 are separate bodies,
For example, the upper panel 13 and the lower panel 14 may be integrally formed using one flexible film, and the upper panel 13 and the lower panel 14 facing each other may be obtained by folding the upper panel 13 and the lower panel 14.

Next, an embodiment of the present invention will be described with reference to FIGS. In this example, the upper panel 13
The connection electrodes 65 to 68 are respectively formed at the four corners of the edge of the surface on which the detection film 16 is formed. Connection electrodes 65, 6
8 is derived from the electrodes 18 and 19, respectively, and the connection electrodes 66 and 67 are respectively connected to the connection electrodes 6
Relay electrode 71 formed between 5, 66 and 67, 68
And 72.

Relay electrodes 73 and 74 connected to the electrodes 21 and 22 are formed on the lower panel 14 at positions facing the relay electrodes 71 and 72, respectively. The relay electrodes 71 and 73 and the relay electrodes 72 and 74 are respectively connected by, for example, a conductive adhesive, whereby the electrodes 21 and 22 are led out to the connection electrodes 66 and 67, respectively. Note that, in this example, the lower panel 14 may be made of a flexible film as in FIGS. 1 and 2, or may be a glass substrate or the like, for example. A notch 75 is formed in each corner of the lower panel 14 facing the connection electrodes 65 to 68.

On the other hand, on the surface 77b opposite to the circuit component mounting surface 77a of the circuit board 77 on which the position detecting board 76 having the above-described configuration is mounted, the connection electrodes 65 to 68 of the upper panel 13 are provided. The electrodes 81 to 84 are formed at positions opposing each other, and these electrodes 81 to 84 are connected to the electric circuit formed on the circuit component mounting surface 77a side through the through holes 85, respectively.

In the structure shown in FIGS. 3 and 4, each corner of the upper panel 13 is pressed down toward the circuit board 77 as shown in the figure, and the connection electrodes 65 to 68 is a counter electrode 81 of the circuit board 77
To 84 using a conductive adhesive or the like, thereby electrically connecting the position detection board 76 and the circuit board 77.

FIGS. 5 and 6 show an embodiment of the third aspect of the present invention. In this example, the configuration shown in FIGS. 1 and 2 and the configuration shown in FIGS. 3 and 4 are used in combination, that is, a pair of connection is made to the edge of the lower panel 14 made of a flexible film. The pieces 86 and 87 are cut and formed, and connection electrodes 88 and 89 are formed on the surface of the connection pieces 86 and 87 facing the upper panel 13.

The electrodes 21 and 22 arranged on the detection film 17 of the lower panel 14 are led to these connection electrodes 88 and 89, respectively. The connection pieces 86 and 87 are led out to the circuit component mounting surface 91a side through the notches 92 formed on the edge of the circuit board 91, and the connection electrodes 88 and 89 are provided.
Are provided adjacent to the notches 92, respectively.
3, 94, for example, by a conductive adhesive.

On the other hand, connection electrodes 95 and 96 extending from the electrodes 18 and 19 are formed at the edge of the detection film 16 forming surface of the upper panel 13. Note that these connection electrodes 95 and 96 are located at the remaining two corners of the lower panel 14 that are not opposed to the corners where the connection pieces 86 and 87 are located. A notch 97 is formed on the lower panel 14 at a position facing the connection electrodes 95 and 96, and electrodes 98 and 99 are formed at a position on the circuit board 91 facing the connection electrodes 95 and 96. The electrodes 98 and 99 are connected to the electric circuit on the circuit component mounting surface 91a through the through holes 85. The connection electrodes 95 and 96 are connected to the electrodes 98 and 99 at the notch 97 by, for example, a conductive adhesive.

In the configuration shown in FIGS. 5 and 6, the electrical connection between the position detection board 101 and the circuit board 91 is made as described above.

[0027]

As described above, according to the present invention, it is possible to obviate the need for a tail which is conventionally provided on the position detecting board for electrically connecting the position detecting board and the circuit board. Therefore, the position input device can be reduced in size, and the adverse effect of the tail bending on the detection film due to the bending of the tail, which has conventionally been a problem, can be eliminated.

Therefore, according to the present invention, a small-sized position input device having good performance can be realized.

[Brief description of the drawings]

FIG. 1 is an oblique perspective view for explaining an embodiment of the present invention.

FIG. 2 is a perspective view seen from obliquely below for explaining the embodiment of the invention of claim 1;

FIG. 3 is an oblique perspective view for explaining the embodiment of the invention of claim 2;

FIG. 4 is a perspective view seen from obliquely below for explaining the embodiment of the invention of claim 2;

FIG. 5 is a perspective view seen obliquely from above for explaining an embodiment of the invention of claim 3;

FIG. 6 is a perspective view seen from obliquely below for explaining the embodiment of the invention of claim 3;

FIG. 7 is a perspective view of a conventional position input device viewed obliquely from above.

FIG. 8 is a perspective view of a conventional position input device viewed from obliquely below.

FIG. 9 is a perspective view for explaining the structure of the position detection board in FIGS. 7 and 8;

Claims (3)

[Claims] An upper panel and a lower panel each having a detection film on one surface, a position detection substrate arranged such that the detection films are closely opposed to each other, and a circuit board for driving the position detection substrate; In a position input device in which the position detection substrate is mounted on the surface opposite to the circuit component mounting surface of the circuit board with the lower panel side facing, a connection piece is cut into an edge of the lower panel, and On a surface of the connection piece facing the upper panel, a connection electrode derived from an electrode provided on each of the detection films is formed, and the connection piece on which the connection electrode is formed is an edge of the circuit board. A position input device which is led out to the circuit component mounting surface side through a notch formed in the above, and an electrode on the circuit component mounting surface is connected to the connection electrode. 2. An upper panel and a lower panel each having a detection film on one surface, a position detection substrate arranged such that the detection films are closely opposed to each other, and a circuit substrate for driving the position detection substrate, In a position input device in which the position detection board is mounted on the surface opposite to the circuit component mounting surface of the circuit board with the lower panel side facing the connection, the connection derived from the electrodes arranged on each of the detection films Electrodes are formed on the edge of the detection film forming surface of the upper panel, and a cutout is formed in a portion of the lower panel facing the connection electrode, and a notch is formed on a surface of the circuit board opposite to the circuit component mounting surface. A position input device, wherein an electrode formed by through-hole connection and the connection electrode are connected to each other at the notch. 3. An upper panel and a lower panel, each having a detection film on one surface, comprising a position detection substrate arranged such that the detection films are closely opposed to each other, and a circuit board for driving the position detection substrate. In a position input device in which the position detection substrate is mounted on the surface opposite to the circuit component mounting surface of the circuit board with the lower panel side facing, a connection piece is cut into an edge of the lower panel, and On the surface of the connection piece facing the upper panel, a connection electrode derived from an electrode arranged on the detection film of the lower panel is formed, and the connection piece on which the connection electrode of the lower panel is formed is the above-described connection piece. It is led to the circuit component mounting surface side through a notch formed at the edge of the circuit board, and the electrode on the circuit component mounting surface is connected to the connection electrode of the lower panel, Arranged on the detection membrane A connection electrode derived from the electrode being formed is formed on an edge of the detection film forming surface of the upper panel; a cutout is formed in a portion of the lower panel facing the connection electrode of the upper panel; A position where an electrode formed through-hole connection on the surface opposite to the circuit component mounting surface of the circuit board and a connection electrode of the upper panel are connected to each other in a cutout portion of the lower panel. Input device.