JP6233844B2 - Keyboard device - Google Patents

Description

  The present invention relates to a keyboard device in which an electrostatic sensor that detects a change in electrostatic capacitance is arranged in an area below a key top.

  Conventional personal computers change the display content of the display screen by operating multiple keytops arranged on the keyboard device, or by operating a touchpad or mouse located in front of the keytop arrangement area. Input operations such as letting go.

  In addition, there is a conventional example in which a capacitance type sensor other than the touch pad is provided in the keyboard device.

  Patent Document 1 describes a keyboard device in which a proximity sensor is arranged on a membrane sheet constituting a plurality of switch input units, and a keyboard device in which a proximity sensor is arranged in a frame located between adjacent key tops. Yes. In these keyboard devices, when the proximity sensor detects that the user's hand approaches the keyboard device, the light source is turned on and the key switch is illuminated.

  In the keyboard device described in Patent Document 2, a contact detection sensor is embedded in a key top. In this keyboard device, an input corresponding to the movement trajectory of the finger can be performed by bringing the fingertip into contact with the top surface of the keytop and sliding the keytop across the keytops.

JP 2013-61854 A JP 11-194882 A

  The keyboard device described in Patent Document 1 is provided with a proximity sensor on a membrane sheet or a frame, but this proximity sensor can only detect the approach of the operator's hand, and the finger or hand on the keyboard device can be detected. It is not possible to detect movement.

  The keyboard device described in Patent Document 2 requires a process of attaching a contact detection sensor to each key top, and the structure of each key top is complicated. In addition, it is necessary to pull out the wiring from the touch detection sensor to the outside of the key top and connect it to the wiring board provided on the support board, which complicates the structure of the keyboard device and attaches the key top. This wiring work is also complicated.

  The present invention solves the above-described conventional problems, and by disposing an electrostatic sensor using the lower region of the illumination sheet, a detection operation based on a capacitance change can be performed without complicating the overall structure. An object of the present invention is to provide a keyboard device that can be used.

  In addition, the present invention provides a keyboard device configured such that an electrode of an electrostatic sensor is arranged on the lower side of a metal substrate that supports a key top so that a finger or a hand positioned above the key top can be detected. The purpose is that.

  Furthermore, the present invention is configured to detect a finger or a hand located above the key top even in a structure in which the key top is disposed inside the opening formed in the metal cover member. An object is to provide a keyboard device.

The present invention includes a plurality of key tops, a switch input unit disposed below each of the key tops and operated by the key tops, and a light guide sheet disposed below the switch input unit. In the keyboard device,
An electrostatic sensor facing the key top is provided, and an electrode of the electrostatic sensor is disposed below the light guide sheet.

  In the keyboard device of the present invention, since the electrodes of the electrostatic sensor are arranged using the lower region of the light guide sheet, a normal key top can be used, and the structure of the keyboard device is also complicated. And an electrostatic sensor can be arranged.

  The keyboard device of the present invention can be configured such that the electrode sheet on which the electrodes are formed is disposed so as to overlap the lower side of the light guide sheet.

  In this case, the keyboard device can be configured such that the electrode is formed on the lower surface of the electrode sheet, and the upper surface is a light reflecting surface.

  In the keyboard device of the present invention, the key top is supported so as to be movable up and down on a metal substrate via a movable support member, and the light guide sheet and the electrode are disposed below the metal substrate, An opening is formed in the metal substrate, and the light guided by the light guide sheet passes through the opening and is given to the key top, and the electrode faces the opening. .

  In the keyboard device according to the invention, the key top is supported on the metal substrate, so that the mechanical strength can be increased. Further, an opening is formed in the metal substrate, and light guided by the light guide sheet is given to the key top from the opening so that the key top can be illuminated. By making the electrode disposed on the lower side of the metal substrate face the opening, a detection electric field can be formed on the key top side using the opening for illumination. Therefore, when a finger or hand touching the key top is detected or the finger or hand is moved at a position away from the key top, the operation can be detected.

  The present invention may be configured such that the metal substrate is used as a counter electrode, and a change in capacitance between the electrode disposed on the lower side of the light guide sheet and the metal substrate is detected.

  In the keyboard device of the present invention, the metal substrate does not hinder the detection sensitivity, but rather the detection operation with high sensitivity can be performed by using the metal substrate as the counter electrode.

  Or this invention can be comprised as what has a metal cover member and the said keytop is arrange | positioned inside each of the some opening part formed in the said cover member.

  In the above-described invention, a thin and high strength keyboard can be configured by using a metal cover member. Also in this case, the detection electric field can be formed above the key top by making the electrode disposed on the lower side of the light guide sheet face the lower side of the opening where the key top exists.

  The present invention may be configured such that the cover member is used as a counter electrode, and a change in capacitance between the electrode disposed on the lower side of the light guide sheet and the cover member is detected. it can.

  In the keyboard device according to the present invention, the metal cover member does not hinder the detection sensitivity, but rather the detection operation with high sensitivity can be performed by using the cover member as the counter electrode.

  In the keyboard device according to the present invention, each of the plurality of electrodes is individually opposed to the lower side of the key top, and the electrodes are connected to each other to form a plurality of X electrode rows and a plurality of Y electrode rows. Thus, a change in mutual capacitance between the X electrode array and the Y electrode array is detected.

  Alternatively, each of the plurality of electrodes located on the lower side of the key top may detect a change in self-capacitance.

  In the present invention, the electrostatic sensor can be arranged using the lower region of the light guide sheet. In addition, even when a metal substrate or metal cover member is used, by making the electrode face the illumination opening facing the key top, the finger or hand moving in front of the key top has high sensitivity. It can be detected.

The perspective view of the personal computer provided with the keyboard apparatus of embodiment of this invention, The top view which shows the keyboard apparatus of the 1st Embodiment of this invention, Sectional drawing which cut | disconnected the keyboard apparatus shown in FIG. 2 by the III-III line | wire, An exploded perspective view showing a part of the structure of the keyboard device; Arrangement of electrodes constituting the electrostatic sensor, The top view which shows the keyboard apparatus of the 2nd Embodiment of this invention, Sectional drawing which cut | disconnected the keyboard apparatus shown in FIG. 6 by the VII-VII line, A circuit block diagram of a personal computer including a keyboard device according to an embodiment of the present invention,

  A personal computer 1 shown in FIG. 1 is a book type in which a keyboard device 2 and a display device 3 are integrated so as to be foldable. However, in the present invention, the keyboard device 2 and the display device 3 may be formed separately and connected via a wired or wireless interface.

  The display device 3 incorporates a display panel such as a color liquid crystal display panel, and the display screen 4 appears in almost the entire area of the display device 3.

  The keyboard device 2 has a thin case 5. In the keyboard device 2, a key array region 10 is formed in the center portion of the case 5, and a touch pad 7 is disposed on the front side (Y2 side) of the key array region 10. The touch pad 7 is a mutual capacitance detection type, and a plurality of X direction electrodes extending in the X direction and a plurality of Y direction electrodes extending in the Y direction intersect with each other in an insulated state. An input operation can be performed by touching the touchpad 7 with a finger of a person who is a conductor.

  FIG. 2 shows a plan view of the keyboard device 2, and FIG. 3 shows a cross-sectional view taken along line III-III of FIG. FIG. 4 is an exploded perspective view showing a structure of a portion corresponding to each key top.

  As shown in FIG. 3, the thin case 5 has a top surface 5a, a side surface 5b, and a bottom surface 5c. Case 5 is made of synthetic resin. A metal substrate 11 is installed in the key array region 10, and the sheet laminate 30 is sandwiched between the bottom surface 5 c of the case 5 and the metal substrate 11.

  As shown in FIGS. 3 and 4, a membrane laminate 12 and a mask sheet 13 are sequentially stacked and fixed on a metal substrate 11, and a key top 15 is provided above the mask sheet 13.

  In the portion where the key top 15 is provided, the first support piece 11 a and the second support piece 11 b are bent upward on the metal substrate 11. As shown in FIG. 4, a pair of first support pieces 11a are provided apart in the Y direction, and a pair of second support pieces 11b are provided apart in the Y direction.

  In the membrane laminate 12, a pair of openings 12a and 12a and an opening 12b are formed in regions facing the respective key tops 15. The mask sheet 13 has openings 13a and 13a and an opening 13b. The openings 12a and 12a of the membrane laminate 12 and the openings 13a and 13a of the mask sheet 13 are formed in a shape and size that overlap at least partially, and the openings 12b and 13b are also at least partially overlapped. Overlapping shapes and sizes are formed.

  The first support piece 11a is inserted into the opening 12a and the opening 13a, the second support piece 11b is inserted into the opening 12b and the opening 13b, and the respective support pieces 11a and 11b are inserted into the membrane laminate 12. Further, it protrudes upward from the mask sheet 13.

  A first movable support member 16 and a second movable support member 17 are provided between each key top 15 and the metal substrate 11. One end 16a of the first movable support member 16 is rotatably supported by the first support piece 11a, and the other end 16b is rotatably supported by the lower portion of the key top 15 and slidable in the lateral direction. ing. The second movable support member 17 has one end 17a rotatably supported on the lower part of the key top 15, and the other end 17b supported rotatably on the second support piece 11b and slidable in the lateral direction. Yes. The central portions of the first movable support member 16 and the second movable support member 17 are rotatably connected to each other. The first movable support member 16 and the second movable support member 17 are X-shaped. The support link is configured.

  An elastic member 18 is provided between the mask sheet 13 and the key top 15. The elastic member 18 is made of synthetic rubber and applies an upward biasing force that is a direction away from the metal substrate 11 to the key top 15. The inside of the lower side of the elastic member 18 is a cavity, and a downward pressing protrusion 18a is integrally formed in the cavity.

  As shown in FIG. 3, the membrane laminate 12 is configured by laminating a substrate sheet 12c, a pressing sheet 12d, and a spacer layer 12e sandwiched between the sheets 12c and 12d. A hole is formed in the spacer layer 12e to form a switch input portion 12f at the portion of the elastic member 18 where the pressing convex portion 18a faces. The switch input portion 12 f is formed at a position facing the pressing convex portion 18 a of the elastic member 18 provided under all the key tops 15.

  In the switch input unit 12f, a pair of lower contacts is provided on the upper surface of the substrate sheet 12c, and an upper contact is provided on the lower surface of the pressing sheet 12d. The pair of lower contacts are individually connected to the conductive pattern wired on the upper surface of the substrate sheet 12c. When the key top 15 is pressed, the one end 16a of the first movable support member 16 rotates about the engaging portion with the first support piece 11a, and the one end 17a of the second movable support member 17 is the key top. The key top 15 descends by rotating at the lower part of the key 15. At this time, the elastic member 18 is crushed by the key top 15, and the pressing sheet 12d of the switch input unit 12f is pressed by the pressing projection 18a via the mask sheet 13, so that the upper contact contacts the pair of lower contacts. Thus, the lower contacts are brought into conduction with each other. Thereby, a key input signal is obtained.

  As shown in FIG. 4, in the metal substrate 11, a pair of openings 11c and 11c are formed in a portion where the first support piece 11a is raised, and an opening 11d is formed in a portion where the second support piece 11b is raised. Is formed. The openings 11 c and 11 c are formed in a shape and size that at least partially overlaps the openings 12 a and 12 a of the membrane laminate 12 and the openings 13 a and 13 a of the mask sheet 13. Similarly, the opening 11d is formed in a shape and size that overlaps the opening 12b and the opening 13b.

  As shown in FIG. 4, the sheet laminate 30 sandwiched between the bottom surface 5 c of the case 5 and the membrane laminate 12 is composed of a light guide sheet 31 and an electrode sheet 32 placed under the light guide sheet 31.

  The light guide sheet 31 is a translucent resin sheet such as a PET sheet or a polycarbonate sheet, and on the lower surface 31a, at least a portion facing the key top 15 is a light reflecting surface. In the light reflecting surface, white paint is applied to the lower surface 31a, or a rough surface for irregularly reflecting light is formed on the lower surface 31a.

  The keyboard device 2 is provided with a plurality of light sources that face the side end surfaces of the light guide sheet 31. The light source is an LED element or the like. The light emitted from the light source is guided into the light guide sheet 31, reflected by the light reflecting surface, and emitted above the light guide sheet 31. The light emitted from the light guide sheet 31 passes through the openings 11 c and 11 d of the metal substrate 11, the openings 12 a and 12 b of the membrane laminate 12, and the openings 13 a and 13 b of the mask sheet 13, and falls to the key top 15. Irradiated from the side.

  The key top 15 has characters and symbols written on a part of its upper surface, and the part is translucent and the other part has a light shielding structure. The letters and symbols are illuminated by the light applied to the key top 15.

  The electrode sheet 32 is formed of a PET sheet or the like, and an electrode 33 and a wiring 34 connected to the electrode 33 are formed on the upper surface thereof. The electrode 33 and the wiring 34 are formed of a conductive material layer such as a printed layer such as a silver paste or an etched copper foil layer. The electrode 33 is square or rectangular. The electrode 33 may be circular or elliptical.

  In the plan view of FIG. 5, the arrangement of the electrodes 33 is schematically shown. In FIG. 5, the electrode 33 is described by being distinguished into an X electrode 33 x and a Y electrode 33 y. Actually, the arrangement of the electrodes 33x and 33y shown in FIG. 5 and the arrangement of the key tops 15 shown in FIG. 2 coincide with each other. However, in FIG. 5, the arrangement of the electrodes is slightly simplified.

  Note that the electrodes 33x and 33y do not have to face all the key tops 15. For example, the electrodes 33x and 33y exist below the small area key top 15a and the large area key top 15b shown in FIG. You don't have to. In addition, the electrodes 33x and 33y may be arranged below a part of the key tops 15 so as to be every other or every second.

  In the electrode sheet 32 shown in FIG. 5, the X electrodes 33x are connected to each other by wirings 34x to form X electrode rows X1 and X2. In the X electrode row X1, ten X electrodes 33x are alternately arranged so as to form two rows in the X direction, and are connected in series with each other. Also in the X electrode row X2, ten X electrodes 33x are alternately arranged so as to form two rows in the X direction, and are connected in series with each other.

  The Y electrodes 33y are connected to each other by a wiring 34y to form Y electrode rows Y1, Y2, Y3, Y4, Y5. In the Y electrode row Y1, four Y electrodes 33y are alternately arranged in an oblique direction in the Y direction, and are connected in series with each other. The same applies to the Y electrode rows Y2, Y3, Y4, and Y5.

  Lead wires 35x extend from the X electrode rows X1 and X2, respectively, and each lead wire 35x is connected to a two-pole contact provided in the connector portion 36x. Lead wires 35y extend from the Y electrode rows Y1, Y2, Y3, Y4, and the lead wires 35y are respectively connected to five-pole contacts provided in the connector portion 36y.

  In the electrode sheet 32 shown in FIG. 5, the X electrode 33x and the Y electrode 33y constitute a mutual capacitance type electrostatic sensor. For example, the Y electrode rows Y1, Y2, Y3, Y4, and Y5 are sequentially connected to the drive circuit by a multiplexer to form a Y electrode 33y that constitutes the Y electrode rows Y1, Y2, Y3, Y4, and Y5. A rectangular wave pulse voltage is applied intermittently. At this time, all the X electrodes 33x of the X electrode rows X1 and X2 are connected to the detection circuit. Since a capacitance is formed between the X electrode 33x and the Y electrode 33y, a current flows through the X electrode 33x at the rise and fall of the drive voltage applied to the Y electrode 33y. When the finger or hand is positioned above the key top 15, the electric field is absorbed by the finger or hand, so that the current flowing through the X electrode 33x changes. In the sensor control unit provided in the keyboard device 2, the current detected by the X electrode 33 x and which Y electrode row of the Y electrode rows Y 1, Y 2, Y 3, Y 4, Y 5 is supplied with the drive voltage From the information, the X coordinate information of the approach position of the finger or hand can be obtained.

  The X electrode rows X1 and X2 are sequentially connected to the drive circuit and all the Y electrodes 33y are connected to the detection circuit in a time that does not overlap with the above processing, and the Y or the position where the finger or hand approaches on the key top 15 Coordinate information is obtained.

  In the driving method, when a driving voltage is applied to the X electrode 33x and the Y electrode 33y, an electric field is formed upward from the electrode 33. As shown in FIG. 4, the metal substrate 11 is disposed above the electrode 33, but since the illumination openings 11 c and 11 d are formed in the metal substrate 11, the electric field from the electrode 33 is An electric field can be formed above the key top 15 by being applied to the key top 15 through the portions 11c and 11d. In the region where the electric field is formed, a change in the stray capacitance between the electrode 33 to which the drive voltage is applied and the electrode 33 connected to the detection circuit is detected.

  Since the openings 11c and 11d and the electrode 33 are positioned below each of the plurality of key tops 15, if a finger or hand is positioned above the key arrangement region 10, the detection side electrode 33 is affected by the influence. The flowing current changes. Thereby, when a finger or a hand is moved above the key arrangement region 10, the position information can be acquired as information on the XY coordinates.

  As another driving method of the electrostatic sensor, the electrode 33 positioned under the key top 15 may be an independent electrode, and each electrode may be individually connected to the driving circuit and the detection circuit. For example, as shown in FIG. 2, one of the key tops 15 is used as a drive electrode (D), and a plurality of other key tops 15 adjacent to the drive electrode (D) are used as detection electrodes. As (S), a change in mutual capacitance between the drive electrode (D) and the detection electrode (S) is detected. By switching the drive electrode (D) and the detection electrode (S) in order with a multiplexer, the approach position is acquired as information on the XY coordinates when a finger or hand approaches the key array region 10. can do.

  Alternatively, a self-capacitance type drive / detection method in which a drive voltage is sequentially applied to each electrode and a change in stray capacitance can be detected by detecting a delay in current flowing through the electrode may be employed.

  Furthermore, each electrode 33 can be used as an independent electrode, and the metal substrate 11 can be used as a counter electrode. In this method, when the metal substrate 11 is connected to a drive circuit and a rectangular-wave pulsed drive voltage is intermittently applied to the metal substrate 11, a current flows through the electrode 33 at the rise and fall of the drive voltage. When a finger or hand approaches the key top 15, the value of the current flowing through the electrode 33 changes. Therefore, the electrodes 33 arranged under the plurality of key tops 15 are sequentially connected to the detection circuit, and the current detected by each electrode 33 is monitored, so that the finger or the finger can be placed at any position on the key arrangement region 10. It is possible to detect whether the hand is approaching.

  Conversely, the metal substrate 11 may be connected to the detection circuit, and the electrodes 33 disposed under the plurality of key tops 15 may be sequentially connected to the drive circuit. By monitoring the current flowing through the metal substrate 11 and obtaining information on which electrode 33 is applied with the drive voltage, it is possible to detect which position on the key arrangement region 10 the finger or hand has approached.

  In the drive / detection method using the metal substrate 11 as the counter electrode, the metal substrate 11 does not hinder the detection of the electrostatic sensor, but rather the metal substrate 1 can be used as a part of the electrostatic sensor. Even if the electrode 33 is disposed on the lower side of the metal substrate 1, a highly sensitive detection operation can be performed.

  In the embodiment, the light guide sheet 31 and the electrode sheet 32 are configured separately. However, the electrode 33 is formed on the lower surface of the electrode sheet 32 and the upper surface is a light reflecting surface. The sheet may serve as a light guide sheet and an electrode sheet.

  6 and 7 show a keyboard device 102 according to the second embodiment. The keyboard device 2 according to the first embodiment and the keyboard device according to the second embodiment are different in basic structure, but members having the same functions are described with the same reference numerals.

  The keyboard device 102 is thin and has a metal cover member 105 facing the upper side of the metal substrate 11. A plurality of openings 105a are formed in the cover member 105, and the plurality of key tops 15 are respectively positioned in the openings 105a.

  A sheet laminate 30 and a membrane laminate 12 are laminated on the metal substrate 11. A first movable support member 16 and a second movable support member 17 are disposed between the metal substrate 11 and the cover member 105. The first movable support member 16 and the second movable support member 17 have upper end portions rotatably connected to the lower surface of the key top 15, and lower end portions are rotatably supported on the inner surface of the cover member 105. ing.

  A dome-shaped leaf spring 108 is disposed on the membrane laminate 12, and a protrusion 108a provided on the lower surface of the top of the leaf spring 108 faces the switch input portion 12f. The key top 15 is biased upward by a leaf spring 108, and the peripheral edge of the key top 15 is pressed against the lower surface of the cover member 105 at the periphery of the opening 105a. When the key top 15 is pressed, the first movable support member 16 and the second movable support member 17 operate so as to fall down, the key top 15 is lowered, and the projection 108a of the key top 15 causes the switch input portion 12f. Is crushed and the contact is switched to the conductive state.

  The sheet laminate 30 is configured by laminating a light guide sheet 31 and an electrode sheet 32, and an electrode 33 is provided on the electrode sheet 32. Alternatively, the electrode 33 may be formed on the lower surface of the electrode sheet 32 and the upper surface may be a light reflecting surface.

  The keyboard device 102 is thin and has a metal substrate 11 and a metal cover member 105 provided on the upper and lower sides in order to increase strength, and the metal substrate 11 and the cover at a portion where the key top 15 or the like is not present. The member 105 is fixed by screwing or the like.

  In the keyboard device 102 of the second embodiment, the metal cover member 105 exists above the sheet laminate 30 having the electrodes 33, but each electrode 33 is below the opening 105 a of the cover member 105. Therefore, the detection electric field E1 from the electrode 33 spreads above the key top 15 through the opening 105a. Therefore, it is possible to form a detection space in a wide range above the key top 15, and when the finger or hand approaches the key arrangement area 10, the operation position can be detected with high sensitivity. .

  In the embodiment shown in FIGS. 6 and 7, both the plurality of electrodes 33 formed independently of each other and the metal cover member 105 can be used as electrodes.

  In this case, when the cover member 105 is connected to the drive circuit and a rectangular drive pulse voltage is intermittently applied to the cover member 105, a current flows through the electrode 33 at the rise and fall of the drive voltage. When a finger or hand approaches the key top 15, the value of the current flowing through the electrode 33 positioned below the key top 15 changes. Therefore, the electrodes 33 arranged under each key top 15 are connected to the detection circuit in order. By doing so, it is possible to detect which position on the key arrangement region 10 the finger or hand has approached.

  Conversely, the cover member 105 may be connected to the detection circuit, and the plurality of electrodes 33 facing the lower side of the key top 15 may be sequentially connected to the drive circuit. By monitoring the current flowing through the cover member 105 and obtaining information on which position the electrode 33 is applied with the drive voltage, it is possible to detect which position on the key arrangement region 10 the finger or hand has approached. it can.

  FIG. 8 is a block diagram of the configuration of the keyboard device 2 in which the electrostatic sensor using the electrode sheet 32 is provided below the metal substrate 11 and the main configuration of the control processing unit 40 mounted on the personal computer 1. Shown in the figure.

  The keyboard device 2 is provided with an operation signal generation unit 41. The operation signal generation unit 41 includes a CPU and a memory. The operation signal generation unit 41 generates a keyboard signal Sk, which is format data having a predetermined number of bytes, from detection signals obtained from a plurality of key switches provided in the key array region 10 and detection signals from the touch pad 7. The

  A detection signal obtained from the electrostatic sensor using the electrode sheet 32 shown in FIGS. 4 and 5 is given to the operation signal generator 41. The electrostatic sensor using the electrode sheet 32 described in the block diagram of FIG. 8 is a concept including a drive circuit, a detection circuit, and a sensor control unit.

  The operation signal generation unit 41 analyzes the detection signal from the electrostatic sensor using the electrode sheet 32 and generates the same operation signal as when the touch pad 7 is operated, and this operation signal is included in the keyboard signal Sk. It is.

  The keyboard signal Sk generated by the operation signal generation unit 41 is given from the output interface 42 to the input interface 43 of the control processing unit 40. The output interface 42 and the input interface 43 are USB interfaces or the like.

  The control processing unit 40 is mainly composed of a CPU and a memory. The processing of each block of the control processing unit 40 shown in FIG. 7 is executed based on previously stored software.

  An operating system (OS) 44 is stored in the control processing unit 40. The display driver 45 is controlled by the operating system 44, and the display content of the display screen 4 is controlled.

  Driver software 46 is installed in the control processing unit 40, and the keyboard signal Sk received by the input interface 43 is given to the driver software 46. In the driver software 46, a standard operation signal applied to the operating system 44 is generated from the keyboard signal Sk in a predetermined format sent from the operation signal generation unit 41 and notified to the operating system 44.

  As shown in FIG. 8, various application software 47 is installed in the control processing unit 40. The application software 47 is an Internet explorer, mail communication software, word processor, various calculation software, game software, or the like.

  When the application software 47 is activated and various images are displayed on the display screen 4, if the finger or hand is moved close to the key arrangement area 10, the operation position on the XY coordinate is set to the electrode sheet 32. The detected output is converted into a signal equivalent to the operation signal of the touch pad 7 and is included in the keyboard signal Sk.

  Therefore, it is possible to perform operations such as moving the image displayed on the display screen 4 or moving the cursor by moving the finger or hand closer to each other on the key arrangement region 10.

DESCRIPTION OF SYMBOLS 1 Computer 2 Keyboard apparatus 3 Display apparatus 4 Display screen 10 Key arrangement area | region 11 Metal plate 11c, 11d Opening part 12 Membrane laminated body 12a, 12b Opening part 12f Membrane laminated body 13 Mask sheet | seat 13a, 13b Opening part 15 Key top 30 Sheet | seat lamination Body 31 Light guide sheet 32 Electrode sheet 33 Electrode 33x X electrode 33y Y electrode 105 Cover member 105a Opening X1, X2 X electrode array Y1, Y2, Y3, Y4, Y5 Y electrode array

Claims (9)

In a keyboard device having a plurality of key tops, a switch input unit disposed below each key top and operated by the key tops, and a light guide sheet disposed below the switch input unit,
A keyboard device comprising an electrostatic sensor facing the key top, wherein an electrode of the electrostatic sensor is disposed below the light guide sheet.   The keyboard device according to claim 1, wherein the electrode sheet on which the electrodes are formed is disposed so as to overlap the light guide sheet.   The keyboard device according to claim 2, wherein the electrode is formed on a lower surface of the electrode sheet, and an upper surface is a light reflecting surface.   The key top is supported on a metal substrate via a movable support member so as to be movable up and down, and the light guide sheet and the electrode are disposed below the metal substrate, and the metal substrate has an opening. The light formed and guided by the light guide sheet passes through the opening and is applied to the key top, and the electrode faces the opening. Keyboard device.   The keyboard device according to claim 4, wherein the metal substrate is used as a counter electrode, and a change in electrostatic capacitance between the electrode disposed on the lower side of the light guide sheet and the metal substrate is detected. 4. The keyboard device according to claim 1 , further comprising a metal cover member, wherein the key top is disposed in each of a plurality of openings formed in the cover member. 5.   The keyboard device according to claim 6, wherein the cover member is used as a counter electrode, and a change in electrostatic capacitance between the electrode disposed on the lower side of the light guide sheet and the cover member is detected.   Each of the plurality of electrodes is individually opposed to the lower side of the key top, and the electrodes are connected to each other to form a plurality of X electrode arrays and a plurality of Y electrode arrays. The keyboard device according to claim 1, wherein a change in mutual capacitance between the column and the Y electrode column is detected. Keyboard device according to any one of claims 1,2,3,4,6, each of the plurality of electrodes positioned on the lower side of the key top to detect a change in the self-capacitance.