DE102010045194A1 - Capacitive touchpad input device and device equipped therewith - Google Patents

Abstract

Disclosed is a capacitive touch pad input device comprising: a detection substrate (40) having a driver electrode (46) and a detection electrode (44), one side of the detection substrate (40) forming a detection area; a circuit substrate (80) having a lighting device (90) that emits light toward the detection substrate (40), the circuit substrate (80) on a side opposite to the detection area side of the detection (98) for detecting an approach of an object to the detection substrate using a change in capacitance between the drive electrode (46) and the detection electrode (44). The detection substrate (40) has a recessed opening (48) at a location that corresponds to a light path for light emitted by the lighting device (90), the driver electrode and the detection electrode being arranged bypassing the recessed opening. A metal plate with a through hole at a position corresponding to the light path is arranged between the detection substrate (40) and the circuit substrate (80).

Description

The present application claims the advantage of Japanese Patent Application No. 2009-211474 , filed Sep. 14, 2009, which is incorporated herein by reference.

The present invention relates to a capacitive touch panel input device capable of detecting a position touched by an object and to a device equipped with such a device.

Such a touch panel input device has a resinous layer substrate provided at the back of a touch surface. On the layer substrate, drive electrodes and a detection electrode are juxtaposed, and these electrodes are electrically connected to a printed circuit board.

When an object (for example, a dielectric medium such as a finger) contacts the touch surface, the capacitance between the drive electrodes and the detection electrode changes, and a detection voltage is obtained from the detection electrode depending on the capacitance change. As a result, the control of the circuit substrate identifies the touched position, and this obtained information is used to perform a predetermined processing (see, for example, Unchecked Japanese Patent Application Publication No. 2007-157107 ).

Although it is in the unaudited Japanese Patent Application Publication No. 2007-157107 is not disclosed, there is also known a technology in which the film substrate is illuminated from the back side of the film substrate (see, for example, Unexamined Art Japanese Patent Application Publication No. 2009-135059 ). Thus, when the technologies disclosed in these two documents are combined, characters or the like introduced into the interface can be displayed in a prominent manner by illuminating the interface from the back side.

For efficiently guiding the light of a luminous element to the layered substrate, it is preferable that cut-out openings are formed in the layered substrate and the drive electrodes and the detection electrode are disposed bypassing these cut-out openings.

However, since there are no drive electrodes or detection electrodes at positions corresponding to the cut-out openings, the electrode density is low, resulting in a low object detection sensitivity. On the other hand, the electrode density at the sites surrounding the cut-out openings is high, resulting in high object detection sensitivity. This results in variations in the object detection sensitivity in a detection range ranging from low to high.

In view of the foregoing, the present invention provides a capacitive touch panel input device which solves the above-described problem and realizes an average object detection sensitivity in a detection area, the invention further provides an apparatus equipped with this apparatus.

According to one aspect, a capacitive touch panel input device according to the present invention comprises: a detection substrate on which drive electrodes and a detection electrode are juxtaposed, wherein the one side of the detection substrate is a detection area; a circuit substrate on which is mounted a light emitting device emitting light toward the detection substrate, the circuit substrate being disposed on a side opposite to the detection area side of the detection substrate; and control means for detecting an approach of an object to the detection substrate on the basis of a capacitance change between the drive electrodes and the detection electrode. The detection substrate has a cut-out opening at a position corresponding to an optical path for the light emitted from the lighting device, and the drive electrodes and the detection electrode are disposed in the recessed opening.

A metal plate is disposed between the detection substrate and the circuit substrate, the metal plate having a through hole at a position corresponding to the light path from the light emitting device to the recessed opening.

According to the invention, drive electrodes and a detection electrode are arranged side by side on the detection substrate, wherein the control means can detect the approach of an object to the detection substrate on the basis of a capacitance change between the drive electrodes and the detection electrode.

On the circuit substrate, a lighting device is mounted, and the detection substrate has a recessed opening at a position corresponding to a light path for the light emitted from the lighting device, wherein the Driver electrodes and the detection electrode are disposed bypassing the recessed opening.

This allows efficiently guiding the light of the lighting device toward the detection substrate, but the electrode density at a location corresponding to the recessed opening is small, resulting in a reduction of the object detection sensitivity, while in the surrounding area the electrode density is high, which is an increase in the object detection sensitivity leads.

However, in the present invention, a metal plate is interposed between the detection substrate and the circuit substrate, and the metal plate has a through hole at a position corresponding to a light path from the light emitting device to the recessed opening. In a location other than the recessed opening corresponding location, although the electrode density is high there, the object detection sensitivity can thus be reduced since this area is covered with the metal plate. On the other hand, at the position corresponding to the recessed opening, the object detection sensitivity due to the through hole is not decreased but remains as it is. As a result, the object detection sensitivity in the detection area can be averaged.

In addition, the metal plate disposed between the detection substrate and the circuit substrate has the function of an electromagnetic interference (EMI) protection device.

In this configuration of the present invention, the circuit substrate may include an electronic component configured to drive the drive electrodes mounted thereon.

This configuration has the added advantage that even if the electronic component formed to drive the drive electrodes generates radio frequency noise, the metal plate provided between the detection substrate and the circuit substrate can block unwanted radio noise or the like.

In the above-described configurations of the present invention, a plate member may have the detection substrate in an arrangement on its rear side, the front side of the plate member forming an operation surface, and an elastic member having elasticity in the direction of its thickness may be interposed between the detection substrate and the metal plate be arranged. The detection substrate may thereby be brought into close contact with the rear surface of the plate member, which is kept pressed the metal plate and the elastic member in the direction of the plate member.

Another feature and another advantage of this configuration is that the plate member, the detection substrate, the elastic member and the metal plate are arranged in this order, and the elastic member the distance between the plate member and the detection substrate and the distance between the detection substrate and the Metal plate pretends.

More specifically, the distance between the plate member and the detection substrate is small and constant, so that no air layer can form between the plate member and the detection substrate. This prevents the generation of variations in the responsiveness due to a space in any part between the detection substrate and the plate member.

Since the detection substrate and the metal plate are disposed so as to be separated from each other by the thickness of the elastic member, an excessive reduction in the object detection sensitivity due to the metal plate can be prevented.

In the above-described configurations of the present invention, a holding member for holding the metal plate and the circuit substrate between the metal plate and the circuit substrate may be provided. The metal plate may have an extension portion that is formed to extend away from an edge of the metal plate and bent toward the interior of the metal plate. By fixing the circuit substrate to the holding member using a screw in a state in which the extension portion is sandwiched between the circuit substrate and the holding member, a grounding pattern disposed on the circuit substrate can be brought into contact with the extension portion.

Another feature and advantage of this configuration is that by connecting the metal plate to the ground pattern of the circuit substrate, various types of noise can be eliminated, so that the metal plate can function as a sufficiently effective device for EMI protection. By fixing the circuit substrate and the holding member to each other by arranging the extension portion of the metal plate therebetween using a screw, the metal plate can be easily connected to the ground pattern In addition, the orientation of the metal plate and the detection substrate is stabilized.

In another aspect, the present invention provides an apparatus including a capacitive touch panel input device as described above.

Such a device has the further advantage that the object detection sensitivity in the detection substrate can be averaged and, as a result, the reliability of the device is improved because there is no cause for concern for an operator of the device.

The invention and further developments of the invention will be explained in more detail below with reference to the drawings of exemplary embodiments. In the drawings show:

1 a diagram in which a touch panel input device according to a first embodiment of the invention is provided in a passenger compartment of a vehicle;

2 an exploded perspective view of the in 1 shown touch panel input device;

3 a sectional view of in 1 shown touch panel input device along the line III-III in 2 ;

4 a top view of the in 3 layered substrate shown;

5 a configuration diagram of the touch panel input device, the in 3 shown integrated circuit includes;

6 an exploded perspective view of a touch panel input device according to a second embodiment; and

7 a sectional view of the touch panel input device along the line VIII-VIII in 6 ,

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 illustrates the passenger compartment of a vehicle 1 , being a seat 4 More specifically, formed by a driver's seat and a front passenger's seat, in the width direction of the vehicle 1 is arranged. A dashboard 2 is located in front of the driver's seat and the passenger seat, and a windshield 6 is again in front of the dashboard 2 arranged when looking out of the vehicle in the forward direction. An area in the direction of movement of the vehicle 1 can be seen from the driver's seat and from the front passenger seat.

In the area of the driver's seat may be on the front of the dashboard 2 arranged instruments 8th For example, the speed, the mileage and the gear shift position of the vehicle 1 Show. A steering wheel 10 is at the end of a steering column 12 rotatably provided, extending from below the dashboard 2 towards the seat 4 extends. A shifter 14 extending from the steering column wall of the steering column 12 extends to the passenger seat, can move up and down.

air outlets 16 an air conditioning system at the front of the dashboard 2 are arranged in the areas of the driver's seat to the front passenger seat, when activated, the air conditioner into the interior of the passenger compartment into.

A monitor or screen 18 is on the front of the dashboard 2 arranged between the driver's seat and the passenger seat. The screen 18 can when activating a navigation device 200 Show maps, operating menus or the like.

A center console 20 extends from below the screen 18 towards the seat 4 , and a slot 22 an audio device into which a CD or MD can be inserted is near the screen 18 arranged.

In the present embodiment, a touch panel unit (capacitive touch panel input device) 24 at the center console 20 at a suitable location on the to the seat 4 side away from the slot 22 arranged.

The touch panel unit 24 For example, the position of an object (a dielectric medium, such as a finger) that is a tactile surface 32 touched, on the touch surface 32 determine. Using information obtained by this determination, the navigation device 200 be operated. It should be noted that in the present embodiment, the touch panel unit 24 although for the operation of the navigation device 200 However, it is of course also suitable for the operation of other mounted in a vehicle devices such. For example, the above-mentioned air conditioner and the above-mentioned audio device.

With reference to 2 can the touch panel unit 24 a plate element 30 have that is formed of a resin material. The plate element 30 According to the present embodiment, the touch area includes 32 , on whose front numbers 1 to 4 embossed or introduced. The plate element 30 is box-shaped and has a downwardly facing opening, with four sides with sides 34 and 36 from the edges of the substantially rectangular interface 32 extend down and an open end 38 form.

With reference to 3 are a layered substrate (detection substrate) 40 , a shielding plate (metal plate) 60 , preferably a holder (holding element) 70 and a printed circuit board (circuit substrate) 80 in the order mentioned inside the plate element 30 arranged. It should be noted that in 3 the layered substrate 40 and the shielding plate 60 are shown with a thickness greater than their actual thickness to facilitate understanding of the construction.

The layered substrate 40 is formed by cutting a resin-insulator sheet. The layered substrate 40 has wiring patterns like these in 4 are shown, and detects the position of an object that the contact surface 32 touched, using a capacity change.

More specifically, the layered substrate 40 a substantially rectangular detection area 42 on, and cut or recessed openings 48 are within the detection range 42 through the layered substrate 40 introduced through. The recessed openings 48 correspond respectively to the positions of the four digits 1 to 4, which are in the touch area 32 are introduced.

For example, a detection electrode 44 and four drive electrodes 46 next to each other in the detection area 42 arranged, wherein the detection area 42 at the back of the touchpad 32 is arranged. The detection electrode 44 and the driver electrodes 46 are made of copper foil material.

In 4 are the driver electrodes 46 arranged so as to extend from the left end to the right end of the detection area 42 extend, where they are branched in this course at appropriate locations up or down, while the recessed openings 48 bypass. In 4 extend the four drive electrodes 46 clockwise to a strip-shaped wiring area 47 at the lower end of the detection area 42 ,

The wiring area 47 has sufficient length to fit the printed circuit board 80 ( 3 ), and the drive electrodes 46 are through the wiring area 47 with the printed circuit board 80 electrically connected.

The three areas of the detection electrode 44 are between the adjacent drive electrodes 46 arranged. More specifically, the three areas of the detection electrode 44 in the in 4 shown arranged such that they from the right end of the detection area 42 extend to the left end of this and the recessed openings 48 Bypass, leaving no the recessed openings 48 form enclosing, closed circuits.

Similar to the driver electrodes 46 are the three areas of the detection electrode 44 Branched at appropriate points in their course up or down and between the adjacent drive electrodes 46 arranged.

As in 4 is shown, the three areas of the detection electrode 44 at the left end of the detection area 42 connected to each other, wherein the detection electrode 44 is formed so that it is to the lower end of the detection area 42 and to the wiring area 47 extends where the detection electrode 44 with the printed circuit board 80 electrically connected.

It should be noted that also vertical drive electrodes (not shown), in the vertical direction of the detection area 42 in 4 run and are arranged at fixed intervals, for example on the side of the detection area 42 are formed, which is opposite to the side on which the detection electrode 44 and the driver electrodes 46 are provided. These vertically extending electrodes are over the wiring area 47 also with the printed circuit board 80 electrically connected.

Referring again to the 2 and 3 is the shielding plate 60 formed from a thin plate of stainless steel, the shielding plate 60 a substantially rectangular upper surface 62 in contact with the layered substrate 40 , more precisely with the back of the detection area 42 having.

The shielding plate 60 owns opposite to the upper surface 62 ( 3 ) a lower surface 64 that the holder 70 facing, and further are in the shield plate 60 Through openings 68 introduced so that these through the upper surface 62 as well as the lower surface 64 extend through.

The passage openings 68 are concentric with the respective recessed openings 48 and correspond to the respective positions of the digits on the touchpad 32 , The passage openings 68 are formed to have slightly larger opening areas than the recessed openings 48 exhibit.

The holder 70 is made of resin and keeps a distance between the shielding plate 60 and the printed circuit board 80 upright. The holder 70 has a substantially rectangular upper surface 72 , opposite to the upper surface 72 ( 2 ) a lower surface 74 that of the printed circuit board 80 facing, as well as in this way formed continuous openings 78 in that they pass through the upper surface 72 and the bottom surface 74 extend through. The continuous openings 78 are concentric with the respective recessed openings 48 and are formed to have substantially the same opening area as the recessed openings 48 exhibit.

With reference to 2 owns the printed circuit board 80 an upper surface 82 in contact with the holder 70 and a lower surface 84 that with an in 3 illustrated connector 88 is provided, and a U-shaped area 86 for picking up the wiring area 87 is near the connector 88 by cutting off a portion of the printed circuit board 80 from the upper surface 82 through the lower surface 84 formed through.

On the upper surface 82 are LEDs (lighting elements) 90 to illuminate the respective numbers 1 to 4 attached.

More specifically, the LEDs 90 arranged so that they are concentric with the respective recessed openings 48 are. The recessed openings 48 , the passageways 68 as well as the continuous openings 78 have the function of light paths for the LEDs 90 ,

That way, the LEDs can 90 the contact surface 32 Illuminate from the back, so that the numbers 1 to 4 can be displayed in a prominent manner.

That differs from the detection area 42 away extending wiring area 47 is over the sides of the shielding plate 60 , the owner 70 and the printed circuit board 80 as well as through the U-shaped area 86 guided and extends to the lower surface 84 the printed circuit board 80 to connect with the connector 88 to be connected.

An integrated circuit (electronic component) 94 may be at the bottom surface 84 ( 3 ) to be appropriate. The integrated circuit 94 can the LEDs 90 and the driver electrodes 46 and the approach of an object based on a capacitance change between the drive electrodes 46 and the detection electrode 44 detect.

As with reference to 5 you can see that is the integrated circuit 94 in the present embodiment more particularly with an amplifier 96 , an A / D converter 97 and a controller (controller) 98 Mistake. The driver electrodes 46 the touch panel unit described above 24 are through the connector 88 with the controller 98 connected. The detection electrode 44 is through the connector 88 with the amplifier 96 connected, in turn, with the A / D converter 97 connected is.

When a voltage to the driver electrodes 46 is applied, an electric field having a predetermined potential is generated, and when the aforementioned object is the contact surface 32 When touched in this state, the capacitance between the driving electrodes changes 46 and the detection electrode 44 so that coordinate data can be obtained in this way.

If the object in this state is one of the drive electrodes 46 is approaching, between the object and this driving electrode 46 and also between the object and the detection electrode 44 a capacitance is formed, and thereby the capacitance between this driving electrode changes 46 and the detection electrode 44 ,

Subsequently, the potential change of the detection electrode 44 through the amplifier 96 amplified, and after conversion to a digital signal through the A / D converter 97 she will be in control 98 entered.

The control 98 determines coordinate data based on that from the detection electrode 44 obtained information as well as that of the selected drive electrode 46 received information. This identifies the controller 98 the position that has been touched by the object and outputs an actuation signal to the navigation device 200 from.

Although the layered substrate 40 of the embodiment described above with the shielding plate 60 is in contact, can between the layer substrate 40 and the shielding plate 60 also be provided an elastic element.

More specifically, in a touch panel unit 24A a further embodiment, as in the 6 and 7 wherein structures having the same functions as in the above-described embodiment are denoted by the same reference numerals and a detailed description thereof will be omitted; Here is the layer substrate 40 in close contact with the back of the interface 32 arranged.

More specifically, the letters A to F of the alphabet are in the front ( 6 ) of the interface 32 of the present embodiment, and an object may touch the respective letters in a similar manner as in the above-described embodiment.

A layered substrate 40 , preferably a sponge material plate (elastic element) 50 , a shielding plate 60 , a holder 70 and a printed circuit board 80 are in this order inside a plate element 30 arranged according to the present embodiment.

The layered substrate 40 has recessed openings 48 which correspond to the positions of the letters A to F, respectively, and a detection area 42 has wiring patterns similar to those described with reference to FIG 4 are substantially similar, wherein the wiring patterns through a wiring area 47 with the printed circuit board 80 are electrically connected.

Here, the sponge material plate 50 Elasticity in the direction of its thickness, and it has a substantially rectangular upper surface 52 , which is the rear surface of the detection area 42 facing, as well as on the upper surface 52 ( 7 ) opposite side a lower surface 54 that of the shielding plate 60 is facing. In the sponge material plate 50 are continuous openings 58 formed, extending from the upper surface 52 through to the lower surface 54 extend. The continuous openings 58 are concentric with the recessed openings 48 and are formed to have substantially the same opening area as the recessed openings 48 and thus the function of light paths for the LEDs 90 to have.

If the shielding plate 60 , the sponge material plate 50 and the layered substrate 40 in this order from the bottom to the top surface 72 of the owner 70 are stacked as well as inside the plate element 30 are arranged, the holder can 70 the sponge material plate 50 and the shielding plate 60 hold in such a way that these in the direction of the plate element 30 are pressed. This pushes the upper surface 52 the sponge material plate 50 the rear surface of the detection area 42 upwards towards the plate element 30 out, so the detection area 42 preferably in close contact with the rear surface of the plate member 30 can stand.

In addition, the shielding plate 60 of the present embodiment on the holder 70 and the printed circuit board 80 firmly fixed.

More specifically, the shielding plate 60 an L-shaped extension area 67 exhibit. The extension area 67 is at one point on one edge 65 opposite to the wiring area 47 of the layered substrate 40 arranged and is formed such that it extends downwardly and then bent inwardly.

In the L-shaped extension area 67 The vertical surface is formed over an appropriate length so that it extends over the side of the holder 70 extends, and the horizontal surface is formed so as to be in a lower surface 74 of the owner 70 ( 6 ) formed recess area 76 can be accommodated and sandwiched between the lower surface 74 of the owner 70 and the upper surface 82 the printed circuit board 80 is arranged. A screw hole 69 for a screw to be described below 100 is provided at a suitable position in the horizontally extending surface.

LEDs 90 are on the printed circuit board 80 similarly to the embodiment described above, and illuminate the touch surface 62 from the back to highlight the letters A to F in a prominent manner. A grounding pattern 92 the printed circuit board 80 extends on the upper surface 82 the printed circuit board 80 on one of the horizontal surfaces of the extension area 67 facing body ( 6 ). The grounding pattern 92 is formed to be substantially the same size as the horizontal area of the extension portion 67 having.

In the printed circuit board 80 is a screw hole 89 at one of the screw opening described above 69 corresponding location in a continuous manner from the upper surface 82 up to the lower surface 84 educated.

By screwing in the screw 100 from the bottom surface 84 through the screw hole 89 and the screw hole 69 passing through in a state where the horizontal surface of the extension area 67 sandwiched between the holder 70 and the ground pattern 82 is arranged and preferably in contact with them, as well as by fixing the holder 70 and the printed circuit board 80 using the screw 100 is the shielding plate 60 firmly fixed.

As described above, in the touch panel unit 24 respectively. 24A of the embodiments, the driver electrodes 46 and the detection electrode 44 next to each other on the layer substrate 40 provided, and the controller 98 can enter the detection area 42 approaching object based on a capacitance change between the drive electrodes 46 and the detection electrode 44 detect.

Furthermore, the LEDs 90 on the printed circuit board 80 provided, and the coating substrate 40 has recessed openings 48 at the light paths of the LEDs 90 corresponding locations, the driver electrodes 46 and the detection electrode 44 on the layer substrate 40 in the recessed openings 48 are arranged immediately.

The light from the LEDs 90 In this way, it can efficiently move to the layered substrate 40 be guided, and even if the touch panel unit 24 respectively. 24A In the dark, it can be easily identified. In general, the object detection sensitivity is at the recessed openings 48 corresponding points low, since the electrode density is low, while the object detection sensitivity in the surrounding areas of the recessed openings 48 is high, since the electrode density is high.

In the present embodiments, however, the shield plate 60 between the layered substrate 40 and the printed circuit board 80 provided, wherein the shielding plate 60 the passageways 68 at respective locations that the light paths from the LEDs 90 to the recessed openings 48 correspond. In a different area than the places that the recessed openings 48 Thus, despite the high electrode density, the object detection sensitivity does not increase due to a canceling effect, because this area of the shield plate 60 is covered. In places, on the other hand, the recessed openings 48 correspond, the object detection sensitivity becomes due to the through holes 68 not less, and this remains as it is. As a result, the object detection sensitivity in the detection area 42 be averaged.

Furthermore, the shield plate 60 that exist between the layered substrate 40 and the printed circuit board 80 is provided, the function of a device for protection against electromagnetic interference (EMI).

More specifically, even if the integrated circuit 94 that the driver electrodes 46 activates radio frequency radiation generated between the layer substrate 40 and the printed circuit board 80 provided shielding plate 60 Block unwanted radio interference or the like in a reliable manner.

Further, in the touch panel unit 24A the plate element 30 , the layered substrate 40 , the sponge material plate 50 , the shielding plate 60 , the holder 70 and the printed circuit board 80 provided in this order, the sponge material plate 50 the distance between the plate element 30 and the layered substrate 40 as well as the distance between the layer substrate 40 and the shielding plate 60 pretends.

More specifically, the distance between the interface 32 of the plate element 30 and the detection area 42 of the layered substrate 40 made so small and constant that no air layer between the contact surface 32 and the detection area 42 can form. This prevents the generation of a fluctuation in the responsiveness caused by the presence of a space in any part between a detection substrate and a plate member.

Because the layered substrate 40 and the shielding plate 60 are arranged so that they through the thickness of the sponge material plate 50 can be separated from each other, excessive reduction of the object detection sensitivity due to the shield plate 60 be prevented.

Further, by connecting the shield plate 60 with the grounding pattern 92 the printed circuit board 80 as with the touch panel unit 24A , various types of noise are canceled, leaving the shielding plate 60 can act as a sufficiently effective device for EMI protection. By the printed circuit board 80 and the holder 70 with intermediate arrangement of the extension area 67 the shielding plate 60 between them are fastened to each other by means of a screw, the shield plate can be 60 in a simple way with the ground pattern 92 connect, and in addition to this is also the orientation of the shield 60 and the layered substrate 40 stable execution.

Further, in the touch panel unit described above 24 respectively. 24A the object detection sensitivity in the detection area 42 be averaged, and thereby the reliability of the navigation device 200 increases since a case is avoided in which, although an operator of the touch panel unit 24 respectively. 24A the contact surface 32 touched with certainty, but no response occurs, causing concern and restlessness to the operator.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. For example, constructions of the embodiments described above may be partially omitted or combined in any manner other than those described above.

Although the foregoing embodiments have described cases in which the present invention has been described for realizing, for example, the operation of a navigation apparatus, the capacitive touch panel input apparatus according to the present invention can be used not only in on-vehicle devices, but also in such devices as a personal computer (PC), a vending machine, a cash machine, a personal device and a remote control that enables the remote control of a television. Also in these cases, the averaging of the object detection sensitivity is realized in a similar manner as described above.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2009-211474 [0001]
• JP 2007-157107 [0004, 0005]
• JP 2009-135059 [0005]

Claims (5)

A capacitive touch panel input device, comprising: a detection substrate ( 40 ), on the driver electrodes ( 46 ) and a detection electrode ( 44 ) are arranged side by side, wherein it is at the one side of the detection substrate ( 40 ) is a detection area; a circuit substrate ( 80 ) on which a lighting device ( 90 ) is mounted, the light in the direction of the detection substrate ( 44 ), wherein the circuit substrate ( 80 ) on a side opposite to the detection region side of the detection substrate (FIG. 40 ) is arranged; and a control device ( 98 ) for detecting an approach of an object to the detection substrate ( 40 ) based on a capacitance change between the drive electrodes and the detection electrode (Fig. 44 ), wherein the detection substrate ( 40 ) a recessed opening ( 48 ) at a position corresponding to an optical path for the light source ( 90 ) and the driving electrodes ( 46 ) and the detection electrode ( 44 ) bypassing the recessed opening ( 48 ) are arranged, and wherein a metal plate ( 60 ) between the detection substrate ( 40 ) and the circuit substrate ( 80 ), wherein the metal plate ( 60 ) has a passage opening at a location which is the light path from the lighting device ( 90 ) to the recessed opening ( 48 ) corresponds. Capacitive touch panel input device according to claim 1, characterized in that the circuit substrate ( 80 ) an electronic component ( 94 ) which is used to drive the drive electrodes ( 46 ) is trained. Capacitive touch panel input device according to claim 1 or 2, further characterized by: a plate element ( 30 ), at the rear side of which the detection substrate ( 40 ) is arranged and whose front side forms an actuating surface; and an elastic element ( 50 ), which has elasticity in the direction of its thickness and between the detection substrate ( 40 ) and the metal plate ( 60 ), the detection substrate ( 40 ) in close contact with the rear surface of the plate element ( 30 ) is brought by the metal plate ( 60 ) and the elastic element ( 50 ) are held in such a way that they are in the direction of the plate element ( 30 ) are pressed. Capacitive touch panel input device according to one of claims 1 to 3, characterized in that a holding element ( 70 ) for holding the metal plate ( 60 ) and the circuit substrate ( 80 ) between the metal plate ( 60 ) and the circuit substrate ( 80 ) is provided that the metal plate ( 60 ) an extension area ( 67 ) which is formed so as to extend from an edge of the metal plate ( 60 ) and toward the interior of the metal plate ( 60 ) and that by attaching the circuit substrate ( 80 ) on the retaining element ( 70 ) using a screw in a state in which the extension area ( 67 sandwiched between the circuit substrate ( 80 ) and the retaining element ( 70 ), one on the circuit substrate ( 80 ) earthing pattern ( 92 ) in contact with the extension area ( 67 ) is brought. Device to which the capacitive touch panel input device according to one of claims 1 to 4 is attached.

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