JP2002062989A - Touch switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch switch device allowing installation of an optical element in a mounting base board arranged on the back face side of a display device so that the optical element can project and receive detection light traversing immediate front side of a touch panel arranged in front of the display device without using any light guide member. SOLUTION: When the end part of a lead terminal part 12 in a light emitting element 10 is soldered to the mounting base board 3 arranged on the back face side of the display device 1 while the lead terminal part 12 is extended through the lateral side of the display device 1 toward a peripheral part of the touch panel 2a in front of the display device 1, a light emitting element main body part 11 is arranged and supported in the periphery part of the touch panel 2a so as to be set in the position in which the light emitting element main body part 11 can project and receive detection light L traversing immediate front side of the touch panel 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a touch switch device used for an in-vehicle display device or the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of touch switch device, there are a device disclosed in Japanese Patent Application Laid-Open No. Hei 7-261912 and a device disclosed in Japanese Patent Application Laid-Open No. 11-45155.

In the former touch switch device, a light emitting element and a light receiving element are mounted on a mounting substrate disposed around a display screen of a display device, and are disposed and supported around the display screen. . Then, the detection light from the light emitting element is emitted so as to directly cross the front of the display screen,
Further, the projected detection light is configured to be directly received by the opposing light receiving element, and the presence or absence of light blocking of the detection light is used to detect the presence or absence of a touch of a finger or the like on the display screen. .

In the latter touch switch device, a light emitting element and a light receiving element are mounted on a mounting substrate provided on the back side of the display device, and a predetermined portion is provided between the light emitting element and the light receiving element and the periphery of the display screen. A light guide member is provided. Then, the detection light from the light emitting element is guided to one side of the display screen through the light guide member and is projected therefrom toward the other side through the front of the display screen. When the light reaches the other side of the display screen, the light is guided to the light receiving element through the light guide member, and the light receiving element is configured to be able to receive light. The presence or absence is detected.

[0005]

However, in the former touch switch device, a mounting substrate (usually a drive circuit of the display device is formed) disposed on the back side of the display device.
Separately, since it is necessary to dispose and fix the substrate on which the light emitting element and the light receiving element are mounted around the display screen, at least two mounting substrates are required, which leads to an increase in manufacturing cost. Problems arise.

On the other hand, the latter touch switch device has a configuration in which the light emitting element and the light receiving element can be mounted on the mounting substrate provided on the back side of the display device by using the light guide member. Problems do not arise. However, in this case, since a light guide member having a predetermined optical design is required, there is a specific problem that a manufacturing cost is increased.

It is an object of the present invention to provide a touch switch device that can reduce the manufacturing cost.

[0008]

Means for Solving the Problems In order to solve the above problems,
The touch switch device according to claim 1, wherein the light-emitting element that emits detection light so as to cross just before a touch surface provided in front of a display screen of the display device and a light-receiving element that receives the detection light are provided. A touch switch device disposed on a peripheral portion of a touch surface, wherein the light emitting element and the light receiving element are an optical element main body for emitting or receiving detection light and a lead terminal extending from the optical element main body. And an end portion of the lead terminal portion is connected and fixed to a mounting substrate disposed on the back surface side of the display device, and the lead terminal portion passes through the side of the display device to form the touch surface. By extending toward the peripheral portion, the optical element main body projects detection light so as to traverse immediately before the touch surface, or distributes the detection light in a posture capable of receiving the detection light, and distributes the detection light around the touch surface. It was established and supported.

According to a second aspect of the present invention, an end of the lead terminal portion is connected and fixed to a portion of the mounting substrate protruding from the side on the back surface side of the display device, and the lead terminal thereof. The portion may extend toward a peripheral portion of the touch surface in a posture substantially perpendicular to the mounting substrate.

According to a third aspect of the present invention, an end of the lead terminal portion is connected and fixed to a portion of the mounting substrate which is hidden inside the display device on the back surface side of the display device.
The lead terminal portion may extend toward the peripheral portion of the touch surface while being bent along the outer shape of the display device.

The touch switch according to claim 4 is
A touch panel in which a light emitting element that emits detection light so as to cross just before a touch surface provided in front of a display screen of a display device and a light receiving element for receiving the detection light are arranged in a peripheral portion of the touch surface. A switch device, wherein a socket body extending toward a peripheral portion of the touch surface is connected and fixed to a mounting board arranged on a back surface side of the display device, and the light emitting element and the light receiving element are connected to the socket body. By being connected and fixed respectively, in a posture capable of projecting detection light so as to cross just before the touch surface or receiving the detection light,
It is arranged and supported on the periphery of the touch surface.

[0012] According to a fifth aspect of the present invention, the socket body is connected and fixed to a portion of the mounting board that protrudes from the side on the back side of the display device, and is substantially fixed to the mounting board. It may be formed in a column shape extending toward the peripheral portion of the touch surface in a vertical posture.

According to a sixth aspect of the present invention, the socket body is connected and fixed to a portion of the mounting board which is hidden behind the display device on the back surface side of the display device, and extends along the outer shape of the display device. And may be formed in a bent shape extending toward the periphery of the touch surface.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Hereinafter, a first embodiment of the present invention will be described.

As shown in FIG. 1, the touch switch device includes a mounting substrate 3 disposed on the back side of the display device 1;
A light emitting element 10 that emits detection light L so as to cross just before a protection plate 2 provided in front of a display screen 1a of the display device 1
And a light receiving element 15 for receiving the detection light L.

As the display device 1, a liquid crystal display device or the like is used, and a protective plate formed of a transparent plate material such as an acrylic plate and having substantially the same shape and size as the display screen 1a in front of the display screen 1a. 2 are provided. In the present touch switch device, contact of a finger or the like on the touch surface 2a, which is the front surface of the protection plate 2, is detected by the light emitting element 10 and the light receiving element 15.

The display device 1 and the protection plate 2 are
A predetermined cover body 9 together with the light emitting element 10 and the light receiving element 15
The display screen 1a faces the outside through the rectangular opening 9a formed in the cover body 9 and the touch surface 2a is exposed to the outside.

On the mounting substrate 3, a drive circuit for the display device 1, a detection control circuit including a drive circuit for the light emitting element 10, an amplification circuit for the light receiving element, and the like are formed. It is arranged and fixed on the back side of the display device 1 via fixing means. A portion 3a on one side (left side in FIG. 1) of the mounting substrate 3 is formed in a shape protruding to the side of the display device 1, and a portion 3b on the other side (right side in FIG. 1).
Are formed in a shape that is hidden inside the display device 1 without protruding to the side of the display device 1.

As the light emitting element 10, an infrared LED or the like is used, and as the light receiving element 15, an infrared phototransistor or the like is used. The plurality of light emitting elements 10 and light receiving elements 15 are opposed to each other along the periphery of the touch surface 2a so that the optical paths are formed in a matrix on the front side of the touch surface 2a in parallel with the surface direction. It is installed and assembled. Then, detection light L such as infrared light emitted from each light emitting element 10 is configured to be able to be received by each of the light receiving elements 15 facing immediately across the touch surface 2a, and whether or not the detection light L is blocked. Thus, the presence or absence of a finger or the like on the touch surface 2a, the position of the contact, and the like are detected.

The light emitting element 10 includes a light emitting element main body 11 for projecting the detection light L, and a lead terminal 12 extending downward from the light emitting element main body 11.
The length of the lead terminal portion 12 is set to be longer than the distance between the touch surface 2 a and the mounting board 3.
An end portion of the lead terminal portion 12 is inserted into a through hole formed in a portion 3a of the mounting substrate 3 protruding to the side of the display device 1 and connected and fixed by soldering or the like, thereby emitting light. The lead terminal portion 12 of the element 10 is electrically connected to a drive circuit of the light emitting element 10 formed on the mounting substrate 3 and is mechanically fixed and supported in a substantially vertical posture with respect to the mounting substrate 3. . The lead terminal portion 12 linearly extends toward the peripheral portion of the touch surface 2 a in a posture substantially perpendicular to the mounting substrate 3, and the light emitting element main body portion 11 is connected via the lead terminal portion 12 to:
In a posture in which the detection light L can be projected so as to cross just before the touch surface 2a, the detection light L can be arranged and supported around the touch surface 2a.

The light receiving element 15 includes a light receiving element main body 16 for receiving the detection light L and the light receiving element main body 16.
And a lead terminal portion 17 extending downward from the front. An end of the lead terminal portion 17 is inserted into a through hole formed in a portion 3b of the mounting substrate 3 which is hidden behind the display device 1 on the back surface side of the display device 1, and is connected and fixed by soldering or the like. As a result, the lead terminal portion 17 is electrically connected to the amplifier circuit for the light receiving element 15 formed on the mounting substrate 3 and mechanically fixedly supported in a predetermined posture with respect to the mounting substrate 3. You. The lead terminal portion 17 is bent in a crank shape so as to conform to the outer shape of the display device 1 and extends toward the peripheral portion of the touch surface 2 a through the side of the display device 1. The light receiving element main body 16 is disposed and supported around the touch surface 2a in such a manner that the light receiving element main body 16 can receive the detection light L passing immediately before the touch surface 2a.

In the touch switch device configured as described above, the ends of the lead terminals 12 and 17 of the light emitting element 10 and the light receiving element 15 are connected and fixed to the mounting board 3 and the lead terminals 12 and 17 are provided. Extends toward the periphery of the touch surface 2a through the side of the display device 1 so that the light emitting element 10 and the light receiving element 15
The light guide member is arranged and supported on the periphery of the touch surface 2a in a posture capable of projecting the detection light L or receiving the detection light L so as to cross just before the light guide member. Without using, the detection light L crosses just before the touch surface 2a.
The light-emitting element 10 and the light-receiving element 15 are mounted on the mounting board 3
Can be implemented.

Thus, specifically, it is possible to reduce the cost by using only one mounting substrate 3 disposed on the back surface side of the display device 1, and
Cost reduction can be achieved by eliminating the need for a light guide member having a predetermined optical design.

In particular, on the light receiving element 15 side, the end of the lead terminal portion 17 is connected and fixed to a portion 3b of the mounting substrate 3 which is hidden behind the display device 1 on the back side of the display device 1 by soldering or the like. The lead terminal portion 17 is bent in a crank shape along the outer shape of the display device 1 and extends toward the peripheral portion of the touch surface 2a.
Since the light receiving element main body 16 is disposed and supported on the periphery of the touch surface 2a via the interface, the mounting substrate 3 can be made small enough to be hidden inside the display device 1.

As a result, it is possible to increase the number of the mounting substrates 3 to be taken from the substrate serving as the base material, thereby reducing the cost.

Further, in the first embodiment, since the light emitting element 10 and the light receiving element 15 are simply soldered to the mounting substrate 3, they can be manufactured by the same manufacturing process as the conventional one. From this point, an increase in manufacturing cost can be prevented.

In this embodiment, on the light emitting element 10 side, the lead terminal portion 12 is formed linearly in a posture substantially perpendicular to the mounting substrate 3, and on the light receiving element 15 side, the lead terminal section is formed. Although the portion 17 is bent in a crank shape, the lead terminal portions 12 and 17 of one or both of the light emitting element 10 and the light receiving element 15 are formed linearly in a substantially vertical posture or bent in a crank shape. It does not matter.

{Second Embodiment} Next, a second embodiment of the present invention will be described. In the description of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. explain.

As shown in FIG. 2, the touch switch device has a configuration in which a light emitting element 10B and a light receiving element 15B are connected and fixed to a mounting substrate 3 via socket bodies 20 and 25.

That is, the light emitting element 10B includes a light emitting element main body 11B for projecting the detection light L and the light emitting element main body 11B.
B and a lead terminal portion 12B extending downward.

As shown in FIG. 3, the socket body 20 for connecting and fixing the light emitting element 10B has a relay terminal 22 embedded in a substantially prismatic housing 21 formed of resin or the like. One end (the upper end in FIG. 3) of the relay terminal 22 is formed as a female terminal 22a into which the lead terminal 12B can be inserted and connected, and the other end (the lower end in FIG. 3) of the housing 21 is formed. A pin-shaped terminal portion 22 b protruding from the other end and connectable to the mounting board 3 by soldering or the like is formed. This pin-shaped terminal portion 22b is a portion 3 of the mounting substrate 3 which protrudes to the side of the display device 1.
a, the socket body 20 is inserted into the through hole formed therein and soldered, so that the socket body 20 is in a substantially vertical posture with respect to the mounting board 3 and is directed toward the peripheral portion of the touch surface 2a of the display device 1. It is connected and fixed to the mounting substrate 3 so as to extend in a straight line.

The light emitting element 10B is fixedly connected to the socket 20 by inserting and connecting the lead terminal 12B to the female terminal 22a of the socket 20. Thereby, the lead terminal portion 12B of the light emitting element 10B
Is the mounting board 3 via the relay terminal 22 in the socket body 20.
Is electrically connected to the drive circuit of the light emitting element 10B formed in the second step. Further, the light emitting element 10B is arranged and supported on the periphery of the touch surface 2a in such a position that the socket body 20 can project the detection light L across just before the touch surface 2a.

The light receiving element 15B is a light emitting element 1
A light receiving element main body 16B capable of receiving the detection light L projected from the light receiving element 0B and a lead terminal 17B extending downward from the light receiving element main body 16B are provided.

The socket body 25 for connection and fixing of the light receiving element 15B has a shape in which the socket body 20 is formed in a substantially L-shape. A pin-like terminal portion 27b of the relay terminal is formed to project downward, and a female terminal portion 27a of the relay terminal is accommodated and arranged in the end of the vertical punch 25a in a substantially vertical posture. Then, the pin-like terminal portion 27b is inserted into a through hole formed in a portion 3b of the mounting substrate 3 that is hidden inside the display device 1 and soldered, thereby connecting the socket body 25 to the mounting substrate 3. Fixed. Further, the lead terminal portion 17b of the light receiving element 15B is inserted and connected to the female terminal portion 27a of the socket body 25. Thereby, the lead terminal portion 17B of the light receiving element 15B is connected to the light receiving element 15 formed on the mounting substrate 3 via the relay terminal in the socket body 25.
It is electrically connected to an amplifier circuit for B and the like. At this time, the socket body 25 is bent in a substantially L-shape along the outer shape of the display device 1 and extends toward the peripheral portion of the touch surface 2a. The detection light L passing immediately before the surface 2a is arranged in a peripheral portion of the touch surface 2a in a posture capable of receiving the detection light L.

In the touch switch device configured as described above, the mounting board 3 disposed on the back side of the display device 1
The column-shaped socket bodies 20 and 25 extending toward the periphery of the touch surface 2a of the display device 1 are connected and fixed, and the light emitting element 10B and the light receiving element 15B are connected and fixed to the socket bodies 20 and 25. Since the detection light L is projected so as to traverse immediately before the touch surface 2a or the posture in which the detection light L can be received, the detection light L is disposed and supported around the touch surface 2a of the display device 1. The light emitting element 10B and the light receiving element 15B are placed on the back side of the display device 1 in a posture capable of projecting or receiving the detection light L across just before the touch surface 2a without using a light guide member as in the conventional example. Mounting on the mounted mounting board 3 becomes possible.

Thus, specifically, it is possible to reduce the cost by using only one mounting board 3 disposed on the back side of the display device 1, and
Cost reduction can be achieved by eliminating the need for a light guide member having a predetermined optical design.

In particular, on the light receiving element 15B side, the socket body 25 is connected and fixed to a portion 3b of the mounting substrate 3 which is hidden behind the display device 1 on the back side thereof, and follows the outer shape of the display device 1. Touch surface 2
The light receiving element 1 is formed in a shape extending toward the peripheral portion of
5B is connected and fixed to the socket body 25 so as to be disposed and supported on the periphery of the touch surface 2a, so that the mounting substrate 3 can be reduced in size to the extent that it can be hidden inside the display device 1.

As a result, the number of mounting substrates 3 to be removed from the substrate serving as the base material can be increased, and the cost can be reduced.

In this embodiment, the light emitting element 10B
On the side, the socket body 20 is formed so as to extend linearly in a posture substantially perpendicular to the mounting board 3.
On the light receiving element 15B side, the socket body 25 is formed in a bent shape.
0B and the socket bodies 20 and 2 for the light receiving element 15B
5 may be formed linearly in a posture substantially perpendicular to the mounting substrate 3 or in a bent shape.

Furthermore, since the socket bodies 20 and 25 are used, even when the distance between the touch surface 2a and the mounting board 3 is large, the socket bodies 20 and 25 may be used.
The light emitting element 10B
As the light receiving element 15B, an element having ordinary short lead terminals 12B and 17B can be used.

In addition, as compared with the structure in which the light-emitting element main body 11 and the light-receiving element main body 16 are supported by the lead terminal portions 12 and 17 as in the first embodiment, the socket bodies 20 and 25 are more suitable. Light emitting element 10 in a certain posture
B and the light receiving element 15B can be provided and supported.

Incidentally, as the socket bodies 20 and 25, general-purpose general-purpose products can be used.

[Modification] As in the first embodiment, a configuration in which the lead terminal section 12 of the light emitting element 10 or the lead terminal section 17 of the light receiving element 15 is directly soldered to the mounting substrate 3; As in the second embodiment, the light emitting device 10
B and a configuration in which the light receiving element 15B is mounted on the mounting substrate 3 via the socket bodies 20 and 25 may be mixed.

[0044]

As described above, claims 1 to 3 of the present invention.
According to the touch switch device described above, the light-emitting element and the light-receiving element include an optical element body that emits or receives the detection light and a lead terminal that extends from the optical element body, and the lead terminal includes The end portion is connected and fixed to a mounting substrate disposed on the back side of the display device, and its lead terminal portion extends toward the peripheral portion of the touch surface through the side of the display device, Since the optical element main body is arranged and supported on the periphery of the touch surface in a posture capable of projecting detection light so as to traverse immediately before the touch surface or receiving the detection light, the mounting substrate is used. The cost can be reduced by using only one sheet disposed on the back side of the display device, and the cost can be reduced by eliminating the need for a light guide member having a predetermined optical design. it can.

In particular, the end portion of the lead terminal portion is connected and fixed to a portion of the mounting board which is hidden inside the display device on the back surface side of the display device, and the lead terminal portion is connected to the display terminal. If it is configured to extend toward the peripheral portion of the touch surface while being bent along the outer shape of the device, it is possible to reduce the size of the mounting substrate.

According to the touch switch device of the fourth to sixth aspects of the present invention, the socket body extending toward the peripheral portion of the touch surface is connected and fixed to the mounting board disposed on the back surface side of the display device. The light emitting element and the light receiving element are connected and fixed to the socket body, respectively, in a posture capable of projecting detection light so as to traverse immediately before the touch surface or receiving the detection light, Since it is configured to be disposed and supported on the periphery of the touch surface, the number of mounting substrates used can be reduced to only one disposed on the back side of the display device, and cost reduction can be achieved. The cost can be reduced by eliminating the need for the optically designed light guide member.

In particular, the socket body is connected and fixed to a portion of the mounting board which is hidden behind the display device on the back side of the display device, and is bent along the outer shape of the display device. With this configuration, the mounting substrate can be formed in a bent shape extending toward the periphery of the touch surface, so that the size of the mounting substrate can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a touch panel device according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a touch panel device according to a second embodiment of the present invention.

FIG. 3 is a side view showing a socket body used in the touch panel device according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display apparatus 1a Display screen 2a Touch surface 3 Mounting board 10 Light emitting element 11 Light emitting element main body part 12 Lead terminal part 15 Light receiving element 16 Light receiving element main body part 17 Lead terminal part 10B Light emitting element 15B Light receiving element 20 Socket body 25 Socket body L detection light

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Heiji Kuki 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5B068 AA22 AA32 BB18 BC02 BC07 5B087 AA06 CC01 CC11 CC33

Claims (6)

[Claims] 1. A light-emitting element for projecting detection light so as to cross immediately before a touch surface provided in front of a display screen of a display device and a light-receiving element for receiving the detection light are provided at a peripheral portion of the touch surface. Wherein the light emitting element and the light receiving element each include an optical element main body that emits or receives detection light and a lead terminal that extends from the optical element main body. An end of the lead terminal portion is connected and fixed to a mounting substrate disposed on the back surface side of the display device, and the lead terminal portion passes through the side of the display device toward a peripheral portion of the touch surface. By extending, the optical element main body emits detection light so as to cross right in front of the touch surface or receives the detection light in a posture capable of receiving the detection light. Switch device. 2. The touch switch device according to claim 1, wherein an end of the lead terminal portion is connected and fixed to a portion of the mounting substrate protruding from a side of a rear surface of the display device. A touch switch device having a lead terminal portion extending toward a peripheral portion of the touch surface in a posture substantially perpendicular to the mounting substrate. 3. The touch switch according to claim 1, wherein an end of the lead terminal portion is connected and fixed to a portion of the mounting substrate that is hidden inside the display device on the back surface side of the display device. A touch switch device wherein a lead terminal portion extends toward a peripheral portion of the touch surface while being bent along an outer shape of the display device. 4. A light-emitting element for projecting detection light so as to cross immediately before a touch surface provided in front of a display screen of a display device and a light-receiving element for receiving the detection light are provided in a peripheral portion of the touch surface. A socket body extending toward a peripheral portion of the touch surface is fixedly connected to a mounting substrate provided on a back surface side of the display device, wherein the light emitting element and the light receiving element are provided. Are connected and fixed to the socket body, respectively, so as to project detection light so as to traverse immediately before the touch surface or to receive the detection light, and are disposed and supported at a peripheral portion of the touch surface. Touch switch device. 5. The touch switch device according to claim 4, wherein the socket body is connected and fixed to a portion of the mounting board that protrudes from a side of a rear surface of the display device, and the mounting board. A touch switch device formed in a column shape extending toward a peripheral portion of the touch surface in a posture substantially perpendicular to the touch surface. 6. The touch switch device according to claim 4, wherein the socket body is connected and fixed to a portion of the mounting substrate that is hidden behind the display device on the back surface side of the display device. A touch switch device formed in a bent shape that is bent along an outer shape and extends toward a peripheral portion of the touch surface.