WO2012040976A1 - 按键侦测板 - Google Patents

按键侦测板 Download PDF

Info

Publication number
WO2012040976A1
WO2012040976A1 PCT/CN2010/079462 CN2010079462W WO2012040976A1 WO 2012040976 A1 WO2012040976 A1 WO 2012040976A1 CN 2010079462 W CN2010079462 W CN 2010079462W WO 2012040976 A1 WO2012040976 A1 WO 2012040976A1
Authority
WO
WIPO (PCT)
Prior art keywords
key
detection
board
button
detecting
Prior art date
Application number
PCT/CN2010/079462
Other languages
English (en)
French (fr)
Inventor
龙涛
刘正东
龙江
Original Assignee
江苏惠通集团有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏惠通集团有限责任公司 filed Critical 江苏惠通集团有限责任公司
Publication of WO2012040976A1 publication Critical patent/WO2012040976A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches

Definitions

  • the present invention relates to the field of touch, and in particular to a button detection board
  • buttons are widely used in household appliances or consumer electronic products because of their fast response, wide application, and adaptability to harsh environments, so that users have more and more opportunities to operate with buttons.
  • the user can make a call or edit a short message through the keyboard button of the mobile terminal, select a TV channel through the button of the television, and perform fast forward, backward or volume selection through the button of the DVD.
  • FIG. 1 is a schematic diagram of a conventional button, including: a keyboard 10, the keyboard 10 is used to receive user instructions, and the surface of the keyboard 10 usually has a graphic or text prompting the user, such as starting or starting a graphic, advancing or Forward icon, stop or stop icon...; button detection board 20, when the user touches or clicks on the icon or text on the surface of the keyboard 10, detects the user command received by the keyboard, and converts the user command into a work signal.
  • the device is connected to a processing chip (not shown) connected to the button detecting board 20.
  • the button detecting board 20 includes a board body 21 and a detecting button 22, and the board body 21 is usually a printed circuit board (Printed Circuit Board; a PCB) or a Flexible Printed Circuit (FPC) board, the board 21 provides a platform for carrying the detection key 22 and provides an interface for the processing chip.
  • Detecting key 22 located at the surface of the plate member 21, for detecting keyboard user instruction is received, and transmitting the operating signal.
  • the graphic or text on the surface can work, but the keyboard 10 is not suitable for high temperature or other extreme working environment, and the existing button detection board has poor anti-interference ability, which cannot meet the development requirements of the times.
  • the problem solved by the invention is to provide a new button detection board, which can be used to determine the recognition of the button.
  • the process solves the problem that the keyboard is in a high temperature or other extreme working environment, and the anti-interference ability of the button detection board is poor, and the anti-interference ability is poor.
  • the present invention provides a button detecting board, comprising: a board body, the board body has at least two interconnected faces; a plurality of detecting keys, wherein the detecting keys are located in the board body a surface, the first surface of the plate body is parallel to the surface of the metal wiring surface; the detecting key is further located on the second surface of the plate body, and the first surface and the second surface are connected by the plate body Two surfaces.
  • the detection key When the key detection board of the present invention is assembled with the keyboard, the detection key always has a face perpendicular to the keyboard, so that when the user's finger touches the key of the keyboard, the detection key corresponding to the key of the finger and the keyboard is always vertical, when corresponding When the detection button receives the working signal, the working signal always vertically corresponds to the detection button, which improves the resolution of the button detection board, thereby improving the anti-interference ability of the button.
  • the button detecting board of the present invention can also be used as a detecting antenna of the processing chip.
  • the material of the button detecting board setting the direction and thickness of the metal wire located in the button detecting board, and arranging and thickness of the detecting key. And the arrangement of the ports, so that the button detection board can detect the frequency of setting the first frequency segment, and by selecting the material of the button detection board, setting the direction and thickness of the metal wires located in the button detection board, and arranging the detection keys And the thickness and the arrangement of the ports, so that the user's touch is fixed in the second frequency segment, which reduces the analysis difficulty of the analysis chip.
  • the outer circumference of the portion of the detecting key of the second surface of the present invention is curved, and the focus of the curved surface is a user point contact.
  • the point contact is always at the focus of the curved surface, further improving the resolution of the key detection board and improving the anti-interference ability of the key.
  • the portion of the detecting key of the detecting key located on the second surface is recessed than the second surface, and the outer circumference of the portion of the detecting key recessed into the second surface is curved.
  • MCU Micro Controller Unit
  • the plate body is a zigzag shape formed by staggering a protruding portion and an advanced portion, and the detecting key is located at a first surface of the protruding portion of the plate body and at a second surface of the protruding portion, and the structure is not only reduced
  • the microcontroller connected to the button detection board calculates the calculation amount of the signal change of the detection key, that is, the calculation of the charge change calculation of the detection key, thereby improving the reaction speed and resolution of the key; and detecting the detection of the key and the adjacent detection. Air is used as a partition between the keys, so that the degree of interference of the detection keys is greatly reduced, further improving Button resolution.
  • Figure 1 is a schematic view of a conventional button
  • FIG. 2 is a schematic view showing a first embodiment of a button detecting board of the present invention
  • FIG. 3 is a schematic view of a second embodiment of a button detection board according to the present invention.
  • FIG. 4 is a schematic view showing a third embodiment of the button detecting board of the present invention.
  • FIG. 5 is a schematic view showing a fourth embodiment of the button detecting board of the present invention.
  • the inventors of the present invention have proposed the idea of an air touch button based on the defects of the existing capacitive touch screen and its recognition method.
  • a special touch key structure By constructing a special touch key structure, the operator's finger can be used without touching the actual touch screen or keyboard when performing a touch operation.
  • a corresponding power supply mode and a touch recognition method for the touch key structure are designed based on the touch key structure to more accurately identify the touch operation.
  • the specific air touch button structure includes: a keyboard; a detecting board, the detecting board has a plurality of detecting keys corresponding to the button positions of the keyboard, and the detecting board is insulated from the keyboard, when used
  • the trigger signal is judged and analyzed to determine which button is triggered and the corresponding function is triggered.
  • the existing detection board structure in the processing of button determination the calculation workload is large, the button recognition process is long, the analysis test chip calculation workload is large, resulting in the analysis test chip power consumption.
  • the inventors of the present invention have proposed improvements to the key structure.
  • an optimized button detection board comprising: a board body having at least two interconnected faces; a plurality of detecting keys, wherein the detecting keys are located a first surface of the plate body, the first surface of the plate body is a surface parallel to the metal wiring surface; the detecting key is further located at the plate body Two surfaces, and the first surface and the second surface are two surfaces of the connection of the plate body.
  • the plate body is an ITO film, a conductive film, a printed circuit board or a flexible printed circuit board, and the plate body further comprises a metal wire connected to the detecting key in the body of the board or the surface of the board, which is located in the board body and passes through A port on which the metal wire is connected to the detection key, and the port is used to connect the processing chip.
  • the button detecting board of the present invention When the button detecting board of the present invention is assembled with the keyboard, the button detecting board can be assembled with the keyboard at any angle, for example, an orientation of 0 to 180 degrees is matched with the keyboard.
  • the detection key of the button detection board has a face perpendicular to the keyboard, so that when the user's finger touches the key of the keyboard, the detection key corresponding to the key of the finger and the keyboard is always vertical, when the corresponding detection
  • the test button receives the work signal, the work signal always vertically corresponds to the detection button, which improves the resolution of the button detection board, thereby improving the anti-interference ability of the button.
  • the button detection board of the invention can be applied to a touch button, in particular a capacitive touch button; the invention is also applicable to an air button, or the air button refers to a body that does not detect a key on the detection board. Touch button.
  • the button detecting board of the present invention can also be used as a detecting antenna of the processing chip.
  • the material of the button detecting board setting the direction and thickness of the metal wire located in the button detecting board, and arranging and thickness of the detecting key. And the arrangement of the ports, so that the button detection board can detect the frequency of setting the first frequency segment, and by selecting the material of the button detection board, setting the direction and thickness of the metal wires located in the button detection board, and arranging the detection keys And the thickness and the arrangement of the ports, so that the user's touch is fixed in the second frequency segment, which reduces the analysis difficulty of the analysis chip.
  • FIG. 2 is a schematic diagram of a first embodiment of a button detecting board according to the present invention, including: a board body 100, which may be a printed circuit board or a flexible printed circuit board. In this embodiment, printing is selected. a circuit board, the board body 100 is a rectangular parallelepiped having a working surface I and an adjacent surface II.
  • the working surface I is a first surface
  • the adjacent surface II is a second surface
  • the working surface is I is interconnected with the adjacent surface II
  • the working surface is generally parallel to the surface of the metal wiring surface inside the printed circuit board
  • the printed circuit board is usually formed by stacking a plurality of layers of dielectric and wiring layers, the working surface being The surface of the wiring layer parallel to the printed circuit board is perpendicular to the direction of the stack.
  • the detecting button 101 is configured to detect that a keyboard (not shown) receives a user command (ie, the user touches), and converts the user command into a working signal, and the working signal is transmitted to the interface 102 through the metal wire 103.
  • a processing chip (not shown), the detecting key 101 is a metal foil, and in the present embodiment, a copper foil is preferable.
  • the detecting key 101 is located on the working surface I and the adjacent surface ⁇ .
  • the length of the detecting key 101 in the adjacent surface II and the adjacent surface II Consistently, the detection key 101 covers a portion of the adjacent surface II (edge), and the thickness of the copper foil selected for the detection key 101 and the specific shape are determined according to the first frequency segment and the second frequency segment.
  • the first frequency segment is 20KHz to 500KHz
  • the first frequency segment is a low frequency noise signal frequency segment
  • the second frequency segment is 80KHz to 120KHz
  • the second frequency segment is an operating signal frequency segment.
  • the number of detection keys 101 is six, corresponding to a start key, a stop key, a pause key, a fast forward key, a fast reverse key, and a volume key, and in other embodiments, the detection The number of test keys 101 is not limited to six, and can be two, three, four, five, seven, eight, nine ... 32, and the corresponding functions can also be applied according to the button detection board. Scope, such as TV on, off, channel selection; or microwave oven on, stop, time setting, temperature setting; or washing machine on, stop, laundry program selection; or computer keyboard input, such as Q, W , E, R, Fl, Ctrl or Alt key functions and more.
  • the metal wire 103 is located on the surface of the working surface I of the board 100 or inside the board 100 for transmitting an operation signal to the processing chip, and the metal wire 103 is preferably a copper wire.
  • the interface 102 is located inside the board 100 and is used to connect the processing chip.
  • the button detection board can be used as an antenna for low-frequency interference detection for detecting a low-frequency noise signal of a first frequency band (20 kHz to 500 kHz), and fixing a signal of a user's touch to a second frequency band (80 kHz to 120 kHz).
  • the button detection board further includes a balance point 104, and the balance point 104 is used to assist the button detection board as an antenna for low-frequency interference detection, and is used for detecting low-frequency noise of the first frequency segment (20KHz to 500KHz).
  • the balance point 104 is a metal point, and the balance point 104 may be a metal block or a metal additionally prepared inside the plate body 100.
  • the balance point 104 directly adopts the connection hole or the interface 102 of the detection key 101, and the auxiliary detection button 101 is designed to detect the key 101 and the size and diameter of the interface 102 to assist the button detection board for low frequency interference detection. Antenna.
  • the interface 102 When the button detecting board and the keyboard of the first embodiment are assembled for receiving a user instruction, the interface 102 is adopted. And the metal wire 103 charges the detection key 101 to generate a source electric field, and a charge accumulation region is formed on the surface of the detection key 101, and the source electric field penetrates a part of the keyboard corresponding to the detection key 101 (insulating medium touch panel) A polarization electric field that is outwardly diffused from the surface of each of the detection keys 101 is formed, and an electric charge that reaches an equilibrium amount is accumulated in the charge accumulation region of each electrode.
  • each of the detection keys 101 When the 101 is charged, the charge accumulation region of each of the detection keys 101 starts to accumulate charges. When a certain time, the charge accumulation region of each of the detection keys 101 cannot accumulate more charges and starts to generate a discharge, at this time, each Detector The charge accumulated in the charge accumulation region of the test key 101 reaches an equilibrium amount.
  • the material of the keyboard may be glass, or may be other known insulating materials.
  • the key detection board structure of the first embodiment of the present invention has the following functions.
  • the touch screen having the detection key 101 is to be operated, the influence of the operator's finger on the amount of charge in the charge accumulation area is not a direct touch band.
  • the charged electrode is implemented, but is in contact with a keyboard (insulating medium touch panel) that is not connected to the electrode, and may not even be in contact with the keyboard (insulating medium touch panel).
  • each of the detection keys 101 generates a source electric field after charging
  • the source electric field is an electrostatic field that penetrates a keyboard (insulating medium touch panel) located within its electric field range.
  • the keyboard (insulating medium touch panel) is polarized due to the penetration, thereby generating a polarized electric field.
  • the superposition of the polarized electric field to the corresponding source electric field is the true electric field distribution.
  • the true electric field distribution is changed, causing the transfer of the charge in the charge accumulating region, so that the amount of charge in the charge accumulating region changes.
  • the amount of charge in the charge accumulation region of the electrode corresponding to the adjacent detection key 101 is also changed.
  • the change of this change with respect to the touch area must be slower and the relative change is less, so on the basis of the previous maximum charge change, recombination A more accurate touch recognition is achieved by the ratio of the amount of charge change to the amount of charge balance.
  • the detecting key 101 of the button detecting board of the first embodiment of the present invention is located on the working surface I and the adjacent surface ⁇ , the detecting surface 101 and the adjacent surface detecting key 101 both form a charge accumulating area.
  • the user's finger When a finger touches a certain button or approaches a certain button, the user's finger is always perpendicular to one face of the detecting button 101 (working face I or adjacent face ⁇ ), so that the amount of charge in the charge accumulation region of the detecting button 101 is The amount of change is more than an order of magnitude higher than the adjacent detection key 101, and the degree of interference of the detection key is greatly reduced, further improving the button resolution.
  • the inventor of the present invention also provides an optimized button detecting board, comprising: a board body, the board body has at least two interconnected faces; a plurality of detecting keys, wherein the detecting keys are located in the board body a first surface, the first surface of the plate body is a surface parallel to the metal wiring surface; the detecting key is further located on the second surface of the plate body, and the first surface and the second surface are a connection of the plate body The two surfaces are located, and the portion of the detecting key on the second surface is recessed than the second surface.
  • the plate body is an ITO film, a conductive film, a printed circuit board or a flexible printed circuit board, and the plate body further comprises a metal wire connected to the detecting key in the body of the board or the surface of the board, which is located in the board body and passes through A port on which the metal wire is connected to the detection key, and the port is used to connect the processing chip.
  • the design of the portion of the detection key located on the second surface is more advanced than the design of the second surface to further improve the resolution of the key detection board and improve the anti-interference ability of the key.
  • the outer circumference of the portion of the detecting key of the second surface is curved, and the point contact is always at the focus of the curved surface when the user touches, so that the button detecting board and the keyboard assembly of the present invention are assembled.
  • the detection key has a face perpendicular to the keyboard, when the user's finger touches the key of the keyboard, the detection key corresponding to the key of the finger and the keyboard is always vertical, and when the corresponding detection key receives the working signal, the working signal
  • the detection button is always vertically corresponding to improve the resolution of the button detection board, thereby improving the anti-interference ability of the button.
  • the surface of the detecting key on the second surface of the present invention is a curved surface, so that the point contact is always at the focus of the curved surface when the user touches, further improving the resolution of the key detecting board and improving the anti-interference of the key. ability.
  • the button detecting board of the present invention can also be used as a detecting antenna of the processing chip.
  • the material of the button detecting board setting the direction and thickness of the metal wire located in the button detecting board, and arranging and thickness of the detecting key.
  • the arrangement of the ports so that the button detection board can detect the frequency of setting the first frequency segment, and setting the direction of the metal wire located in the button detection board by selecting the material of the button detection board
  • the thickness, the arrangement and thickness of the detection keys, and the arrangement of the ports so that the user's touch is fixed in the second frequency segment, which reduces the analysis difficulty of the analysis chip.
  • FIG. 3 is a schematic diagram of a second embodiment of a button detecting board according to the present invention, comprising: a board body 200, which may be an ITO film, a conductive film, a printed circuit board or a flexible printed circuit board.
  • a printed circuit board is selected
  • the plate body 100 is an irregular flat rectangular parallelepiped having a working surface I and an adjacent surface ⁇
  • the working surface I is a plane
  • the adjacent surface II is a concave surface and a plane interval. Rugged surface.
  • the working surface I is a first surface
  • the adjacent surface II is a second surface
  • the working surface I and the adjacent surface II are connected to each other.
  • the detection button 201 is used to detect that the keyboard (not shown) receives the user command (ie, the user touches) and converts the user command into a work signal.
  • the operation signal is transmitted through a metal wire 203 to a processing chip (not shown) connected to the interface 202, which is a metal foil, and in the present embodiment, is preferably a copper foil.
  • the detecting key 201 is located on the working surface I and the adjacent surface ⁇ . Considering that the adjacent surface II of the plate body 200 is relatively narrow, the length of the detecting key 201 in the adjacent surface II is the same as that of the adjacent surface II.
  • the detection key 201 covers a concave surface (envelope) in the adjacent surface II such that the detection key 201 is a curved surface on the adjacent surface II, and the focus of the curved surface is a user point contact.
  • the thickness and specific shape of the copper foil selected by the detecting button 201 are determined according to the first frequency segment and the second frequency segment.
  • the first frequency segment is 20 kHz to 500 kHz
  • the first frequency segment is the low frequency noise signal frequency.
  • the second frequency segment is 80KHz to 120KHz
  • the second frequency segment is the working signal frequency segment.
  • the number of detection keys 101 is six, corresponding to a start key, a stop key, a pause key, a fast forward key, a fast reverse key, and a volume key, and in other embodiments, the detection The number of test keys 201 is not limited to six, and can be two, three, four, five, seven, eight, nine ... 32, and the corresponding functions can also be applied according to the button detection board. Scope, such as TV on, off, channel selection; or microwave oven on, stop, time setting, temperature setting; or washing machine on, stop, laundry program selection; or computer keyboard input, such as 0, W , E, R, Fl, Ctrl or Alt key functions and more.
  • the metal wire 203 is located on the surface of the working surface I of the board 200 or inside the board 200 for transmitting an operation signal to the processing chip, and the metal wire 203 is preferably a copper wire.
  • the interface 202 is located inside the board 200 for connecting to the processing chip.
  • the material, shape and size of the plate body 200, and the copper foil selected for the detecting key 201 Thickness, layout and size, material, thickness, layout and size of the metal wire 203, and the position and arrangement of the interface 202 enable the button detection board to be used as an antenna for low frequency interference detection for detecting the first frequency band (20KHz to 500KHz)
  • the low frequency noise signal, and the signal of the user's touch is fixed in the second frequency band (80 KHz to 120 KHz).
  • the button detection board further includes a balance point 204, wherein the balance point 204 is used to assist the button detection board as an antenna for low frequency interference detection, and is used for detecting a low frequency of the first frequency segment (20KHz to 500KHz).
  • the noise signal is fixed to the second frequency segment (80 kHz to 120 kHz), and the balance point 204 is a metal point.
  • the balance point 204 is a connection hole or interface 202 of the detection key 201.
  • the specific analysis may refer to the first embodiment of the key detection board and the keyboard assembly for receiving user commands, but it should be noted that the second embodiment
  • the button detecting board when the user's finger touches a certain key or approaches a certain key, not only the user's finger is always perpendicular to one surface of the detecting key 201 (working surface I or adjacent surface ⁇ ), so that The amount of change in the charge amount in the charge accumulation region of the detection key 201 is more than an order of magnitude higher than that of the adjacent detection button 201, and the degree of interference of the detection key is greatly reduced, thereby further improving the advantage of the key resolution, and detecting the key 201 is a curved surface on the adjacent surface II.
  • the user's finger position is a curved surface focus or is close to the curved surface focus, when the user touches a certain key or approaches.
  • the button resolution is optimized.
  • the inventor of the present invention also provides an optimized button detecting board, comprising: a board body, the board body has at least two interconnected faces; a plurality of detecting keys, wherein the detecting keys are located in the board body a first surface, the first surface of the plate body is a surface parallel to the metal wiring surface; the detecting key is further located on the second surface of the plate body, and the first surface and the second surface are a connection of the plate body The two surfaces. And the portion of the detecting key on the second surface protrudes from the second surface.
  • the portion of the detecting key of the detecting key on the second surface protrudes from the second surface, and reduces the calculation amount of the signal change of the detecting key by the microcontroller (MCU, Micro Controller Unit) connected to the button detecting board, that is, The amount of charge change calculation of the key is detected, thereby increasing the button reaction speed and resolution.
  • MCU Micro Controller Unit
  • FIG. 4 is a schematic diagram of a third embodiment of a button detection board according to the present invention, including:
  • the board 300 can be a printed circuit board or a flexible printed circuit board. In this embodiment, a printed circuit board is selected.
  • the board 300 is a rectangular parallelepiped having a working surface I and an adjacent surface II.
  • the working surface I is a first surface
  • the adjacent surface II is a second surface
  • the working surface I and the adjacent surface II are connected to each other.
  • the detection button 301 is configured to detect that a keyboard (not shown) receives a user command (ie, the user touches) and converts the user command into a work signal.
  • the operation signal is transmitted through a metal wire 303 to a processing chip (not shown) connected to the interface 302.
  • the detection key 301 is a metal foil. In the present embodiment, a copper foil is preferred.
  • the detection key 301 is located at the working surface I and the adjacent surface ⁇ and is located at the convex adjacent surface II of the detecting key 301 of the adjacent surface II.
  • the detection button 301 transmits the signal of the user's touch to the microcontroller connected to the button detection board, and the signal of the detection key is calculated by the microcontroller, and the adjacent surface is protruded.
  • the detection key 301 of the II can effectively reduce the amount of calculation of the microcontroller and improve the resolution of the button detection board using the present invention.
  • the detection key 301 is a metal block or a metal foil.
  • a copper foil is preferred.
  • the thickness and specific shape of the copper foil selected by the detection key 301 are determined according to the first frequency segment and the second frequency segment.
  • the first frequency segment is 20 ⁇ to 500 ⁇
  • the first frequency segment is the low frequency noise signal frequency.
  • the second frequency segment is 80 ⁇ to 120 ⁇
  • the second frequency segment is the working signal frequency segment.
  • the metal wire 303 is located on the surface of the working surface I of the board 300 or inside the board 300 for transmitting an operation signal to the processing chip.
  • the metal wire 303 is preferably a copper wire.
  • the interface 302 is located inside the board 300 for connecting to the processing chip.
  • the button detection board can be used as an antenna for low-frequency interference detection for detecting a low-frequency noise signal of a first frequency band (20 ⁇ to 500 ⁇ ), and fixing a signal of a user's touch to a second frequency band (80 ⁇ to 120 ⁇ ).
  • the button detection board further includes a balance point 304, and the balance point 304 is used for the auxiliary button detection board to be used as an antenna for low frequency interference detection, and is used for detecting a low frequency of the first frequency segment (20 ⁇ to 500 ⁇ ).
  • the noise signal is such that the signal of the user's touch is fixed in the second frequency segment (80 ⁇ to 120 ⁇ ), and the balance point 304 is a metal point.
  • the balance point 304 is a connection hole or interface 302 of the detection key 301.
  • the portion of the second surface that detects the key is The outer circumference is curved, and the outer circumference of the portion of the detecting key of the second surface is curved to effectively reduce the calculation of the detection key of the microcontroller (MCU, Micro Controller Unit) connected to the button detection board. The amount of calculation of the signal change.
  • MCU Micro Controller Unit
  • the specific analysis may refer to the first embodiment and the second embodiment.
  • the button detection board and the keyboard are assembled for receiving user commands, but it is necessary to explain
  • the protruding adjacent surface ⁇ of the detecting key 301 of the adjacent surface II causes the amount of charge change in the charge accumulation region of the detecting key 301 to be large when the user's finger touches a certain key or approaches a certain key.
  • the amount of change in the amount of charge in the charge accumulation region of the adjacent detection key 301 is small, and the degree of interference of the detection key is greatly reduced, further improving the advantage of the button resolution.
  • the inventor of the present invention also provides an optimized button detecting board, comprising: a board body, the board body has at least two interconnected faces; a plurality of detecting keys, wherein the detecting keys are located in the board body a first surface, the first surface of the plate body is a surface parallel to the metal wiring surface; the detecting key is further located on the second surface of the plate body, and the first surface and the second surface are a connection of the plate body The two surfaces.
  • the plate body is a zigzag shape formed by staggering the protrusion portion and the recess portion, the detection key being located at a first surface of the protrusion of the plate body and at a second surface of the protrusion portion.
  • the detecting key of the present invention is located on the first surface and the second surface of the protruding portion, which not only reduces the calculation amount of the signal change of the detection key detected by the microcontroller connected to the button detecting board, that is, the calculation of the charge change of the detecting key The amount, thereby increasing the speed and resolution of the button reaction; and the air between the detection button and the adjacent detection button is used as a partition, so that the degree of interference of the detection button is greatly reduced, and the button resolution is further improved.
  • FIG. 5 is a schematic diagram of a fourth embodiment of a button detecting board according to the present invention, including: a board body 400, which may be a printed circuit board or a flexible printed circuit board. In this embodiment, printing is selected. Circuit board.
  • the plate body 400 is zigzag formed by the staggered portion 420 and the recessed portion 430, and the plate body 400 further includes a body portion 410.
  • the plate body 400 has a "Great Wall" shape
  • the body portion 410 is a rectangular parallelepiped
  • the protruding portion 420 is a wall of the Great Wall
  • the number of the protruding portions 420 is seven.
  • the number of protrusions 420 can be three, five, nine, and eleven.
  • the single protrusion 420 is a rectangular parallelepiped.
  • the board 400 including the body portion 410 and the protrusions 420 can be obtained by directly processing a printed circuit board or a flexible printed circuit board.
  • the detection button 401 is configured to detect that the keyboard (not shown) receives the user instruction (ie, the user touches) and will use The user command is converted to a work signal.
  • the operational signal is transmitted through metal wire 403 to a processing chip (not shown) that is coupled to interface 402.
  • the detecting key 401 is located on the first surface and the second surface of the protruding portion 420, and the first surface and the second surface are two surfaces connected to each other.
  • the detection key 401 is a metal foil, and in the present embodiment, a copper foil is preferred.
  • the detection key 401 is located on a surface of the protrusion 420 and an adjacent surface adjacent to the surface.
  • the detection key 401 is located on a surface of the protrusion 420, that is, the first surface of the board 400, usually Parallel to the surface of the metal wiring surface in the printed circuit board, the detecting key 401 is located on the other surface of the protruding portion 420, that is, the second surface of the board 400.
  • the thickness and specific shape of the copper foil selected by the detection key 401 are determined according to the first frequency segment and the second frequency segment.
  • the first frequency segment is 20 kHz to 500 kHz
  • the first frequency segment is the low frequency noise signal frequency
  • the second frequency segment is 80KHz to 120KHz
  • the second frequency segment is the working signal frequency segment.
  • a metal wire 403 is located on the surface of the plate 400 or inside the plate 300 for transmitting a working signal to the processing chip, and the metal wire 403 is preferably a copper wire.
  • the interface 402 is located inside the board 400 for connecting the processing chip.
  • the button detection board can be used as an antenna for low-frequency interference detection for detecting a low-frequency noise signal of a first frequency band (20 kHz to 500 kHz), and fixing a signal of a user's touch to a second frequency band (80 kHz to 120 kHz).
  • the button detection board further includes a balance point 404, wherein the balance point 404 is used to assist the button detection board as an antenna for low frequency interference detection, and is used for detecting a low frequency of the first frequency segment (20KHz to 500KHz).
  • the noise signal is such that the signal of the user's touch is fixed in the second frequency range (80 kHz to 120 kHz), and the balance point 404 is a metal point.
  • the balance point 404 is a connection hole or interface 402 of the detection key 401.
  • the specific analysis may refer to the first embodiment, the second embodiment, and the third embodiment, and the keyboard detecting board and the keyboard are assembled for receiving user commands.
  • the detection key 401 is located on a surface of the protrusion 420 and When the user's finger touches a certain button or approaches a certain button, the amount of change in the amount of charge in the charge accumulation region of the detection button 401 is large, and the charge accumulation region of the adjacent detection button 401 is large. The amount of change in the amount of charge is small, and the degree of interference of the detection key is greatly reduced, further improving the advantage of the button resolution.

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

一种按键侦测板，包括：板体，所述板体至少有两个互相连接的面；多个侦测键，所述侦测键位于所述板体第一表面，所述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第二表面，且所述第一表面和第二表面为板体的连接的两个表面。本发明提供的按键侦测板分辨精度高且功能多样化。

Description

侦测板
本申请要求于 2010 年 9 月 30 日提交中国专利局、 申请号为 201010514747.0、 发明名称为 "按键侦测板"的中国专利申请的优先权， 其全 部内容通过引用结合在本申请中。
技术领域
本发明涉及触摸领域， 特别涉及一种按键侦测板
背景技术
随着电子技术的不断发展， 按键由于其反应快、 应用广、 适应恶劣环境而 广泛应用于家用电器或者消费型电子产品中，从而用户使用按键进行操作的机 会也越来越多。例如， 用户可以通过移动终端的键盘按键拨打电话或者编辑短 信， 通过电视机的按键进行电视频道选择， 通过 DVD的按键进行快进、 后退 或者音量的选择等等。
专利申请号为 US2005/0179673 A1的美国专利中公开一种感应用户手指接 触的电容式按键，现有的电容式按键通常包括按键侦测板和与按键侦测版对应 的键盘， 请参考图 1 , 图 1 为现有的按键示意图， 包括： 键盘 10, 所述键盘 10用于接收用户指令， 所述键盘 10表面通常会有提示用户的图示或者文字， 例如开始或者开始图示， 前进或者前进图示、 停止或者停止图示…； 按键侦测 板 20, 当用户触碰或者点击键盘 10表面的图示或者文字时， 侦测键盘接收到 的用户指令， 并将用户指令转换为工作信号传输至与按键侦测板 20连接的处 理芯片（未图示）， 所述按键侦测板 20包括板体 21和侦测键 22, 所述板体 21 通常为印刷电路板 (Printed Circuit Board; PCB)或者柔性印刷电路 (Flexible Printed Circuit; FPC)板，所述板体 21为承载侦测键 22提供平台和为处理芯片 提供接口，所述侦测键 22位于板体 21的表面，用于侦测键盘接收到用户指令， 并传输所述工作信号。
但是， 随着电子技术的进一步发展，现有按键侦测板的用户需接触到键盘
10表面的图示或者文字才能工作， 而在键盘 10处于高温或者其他极限工作环 境无法适用， 且现有的按键侦测板抗干扰能力较差， 无法满足时代发展要求。
发明内容
本发明解决的问题是提供一种新的按键侦测板，能够筒化按键判断识别的 过程，解决键盘处于高温或者其他极限工作环境无法适用问题和按键侦测板抗 干扰能力较差抗干扰能力差问题。
为解决上述问题， 本发明提供一种按键侦测板， 包括： 板体， 所述板体至 少有两个互相连接的面； 多个侦测键， 所述侦测键位于所述板体第一表面， 所 述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第二 表面， 且所述第一表面和第二表面为板体的连接的两个表面。
本发明的按键侦测板与键盘装配时，侦测键始终有一个面垂直于键盘，使 得用户手指点触键盘的键时， 手指与键盘的键对应的侦测键始终保持垂直， 当 对应的侦测键接收到工作信号时， 工作信号始终垂直对应的侦测键，提高按键 侦测板的分辨率， 从而改善按键的抗干扰能力。
进一步的， 本发明的按键侦测板还可以作为处理芯片的侦测天线，通过选 择按键侦测板的材质，设置位于按键侦测板内的金属导线走向和厚度、侦测键 的排列和厚度以及端口的排列，使得按键侦测板能够探测设定第一频率段的频 率， 并且通过选择按键侦测板的材质，设置位于按键侦测板内的金属导线走向 和厚度、侦测键的排列和厚度以及端口的排列，使得用户的点触固定在第二频 率段， 降低分析芯片的分析难度。
进一步的， 本发明 进所述第二表面的侦测键的部分的外周为弧形， 所述 弧形面的焦点为用户点触点。
使得用户点触时始终点触点位于弧形面的焦点，进一步提高按键侦测板的 分辨率和改善按键的抗干扰能力。
进一步的， 本发明的侦测键的位于第二表面的部分比所述第二表面凹进， 且凹进所述第二表面的侦测键的部分的外周为弧形。降低与按键侦测板连接的 微控制器（MCU, Micro Controller Unit )计算侦测键的信号变化的计算量， 即 侦测键的电荷变化计算量， 从而提高按键反应速度和分辨率。
进一步的， 所述板体为由突出部和 进部交错构成的锯齿形， 所述侦测键 位于所述板体的突出部的第一表面以及位于突出部的第二表面，上述结构不但 降低与按键侦测板连接的微控制器计算侦测键的信号变化的计算量，即侦测键 的电荷变化计算量，从而提高按键反应速度和分辨率； 而且侦测键与相邻的侦 测键之间具有空气作为隔断，使得侦测键受干扰的程度大大降低， 进一步提高 按键分辨率。
附图说明
图 1为现有的按键示意图；
图 2为本发明按键侦测板第一实施例示意图；
图 3为本发明按键侦测板第二实施例示意图；
图 4为本发明按键侦测板第三实施例示意图；
图 5为本发明按键侦测板第四实施例示意图。
具体实施方式
为使本发明的上述目的、特征和优点能够更为明显易懂， 下面结合附图对 本发明的具体实施方式做详细的说明。
在以下描述中阐述了具体细节以便于充分理解本发明。但是本发明能够以 多种不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明 内涵的情况下做类似推广。 因此本发明不受下面公开的具体实施方式的限制。
本发明的发明人基于现有电容式触摸屏及其识别方式的诸多缺陷，提出了 空气触摸按键的设想。通过构建特殊的触摸键结构使得在进行触摸操作时，操 作者的手指可以无需触摸实际的触摸屏或者键盘。并且，基于所述触摸键结构 设计了相应的对触摸键结构的供电方式及触摸识别方法，以对触摸操作进行更 准确地识别。 具体的空气触摸按键结构包括： 键盘； 侦测板， 所述侦测板上具 有多个与键盘的按键位置对应的侦测键， 所述侦测板与所述键盘绝缘隔离， 当 使用的时候， 用户触摸键盘或者接近键盘时候相应于具有触发信号，位于侦测 板上或者与侦测板接口连接的分析测试芯片对所述触发信号进行判断分析，确 定对哪个按键进行触发并且触发相应功能，但是在研究中发现， 采用现有的侦 测板结构在进行按键判断的处理过程中，计算工作量较大，按键识别过程较长， 分析测试芯片计算工作量大、 导致分析测试芯片的耗电量、 占用内存大， 针对 这个问题， 本发明的发明人对按键结构提出了改进。 为此， 本发明的发明人提出一种优化的按键侦测板， 包括： 板体， 所述板 体至少有两个互相连接的面；多个侦测键，所述侦测键位于所述板体第一表面， 所述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第 二表面， 且所述第一表面和第二表面为板体的连接的两个表面。
所述板体为 ITO 薄膜、 导电薄膜、 印刷电路板或者柔性印刷电路板， 所 述板体还包括位于板体内或者板体表面的、 与侦测键相连的金属导线，位于板 体内的、 通过金属导线与侦测键相连的端口， 所述端口用于连接处理芯片。
本发明的按键侦测板与键盘装配时，所述按键侦测板可以任何角度与键盘 之间进行装配， 比如 0 ~ 180° 方位与所述键盘进行配合。 优化地， 可以使所 述按键侦测板的侦测键有一个面垂直于键盘， 使得用户手指点触键盘的键时， 手指与键盘的键对应的侦测键始终保持垂直，当对应的侦测键接收到工作信号 时， 工作信号始终垂直对应的侦测键， 提高按键侦测板的分辨率， 从而改善按 键的抗干扰能力。
本发明的按键侦测板可应用于接触式按键，特别是电容接触式按键； 本发 明还适用于空气式按键或者，所述空气式按键是指人体不会与侦测板上的侦测 键接触的按键。
进一步的， 本发明的按键侦测板还可以作为处理芯片的侦测天线，通过选 择按键侦测板的材质，设置位于按键侦测板内的金属导线走向和厚度、侦测键 的排列和厚度以及端口的排列，使得按键侦测板能够探测设定第一频率段的频 率， 并且通过选择按键侦测板的材质，设置位于按键侦测板内的金属导线走向 和厚度、侦测键的排列和厚度以及端口的排列，使得用户的点触固定在第二频 率段， 降低分析芯片的分析难度。
下面结合一具体实施例对本发明按键侦测板做详细说明。
请参考图 2, 图 2为本发明按键侦测板第一实施例示意图， 包括： 板体 100, 所述板体 100可以为印刷电路板或者柔性印刷电路板， 在本实 施例中，选用印刷电路板，所述板体 100为扁长方体，具有工作面 I和邻面 II, 在本实施例中， 所述工作面 I为第一表面， 邻面 II为第二表面， 且所述工作面 I与邻面 II互相连接， 且所述工作面通常为平行于印刷电路板内部金属布线面 的表面， 所述印刷电路板通常由多层的介质以及布线层堆叠而成， 所述工作面 为平行于印刷电路板的布线层的表面， 垂直于堆叠的方向。
侦测键 101 ,用于侦测键盘 (未图示)接收到用户指令 (即用户点触），并将用 户指令转换为工作信号，工作信号通过金属导线 103传输至与接口 102连接的 处理芯片（未图示）， 所述侦测键 101为金属薄片， 在本实施例中，优选为铜箔。 所述侦测键 101位于工作面 I和邻面 Π, 考虑到所述板体 100为扁长方体， 邻 面 II较狭长， 故所述侦测键 101在邻面 II的部分长度与邻面 II一致， 从视觉 上看侦测键 101包覆部分邻面 II (包边）， 侦测键 101选用的铜箔厚度以及具 体形状需视第一频率段和第二频率段而定， 在本实施例中， 第一频率段为 20KHz至 500KHz, 第一频率段为低频噪声信号频率段； 第二频率段为 80KHz 至 120KHz, 第二频率段为工作信号频率段。 还需要说明的是， 本实施中， 侦 测键 101个数为 6个， 对应为开始键、 停止键、 暂停键、 快进键、 快退键和音 量键， 而在其他实施方式中， 侦测键 101个数不限为 6个， 可以为 2个、 3个、 4个、 5个、 7个、 8个、 9个….32个， 对应的功能也可以根据按键侦测板应 用的范围而设， 例如电视的开启、 关闭、 频道选择； 或者微波炉的开启、停止、 时间设定、 温度设定； 或者洗衣机的开启、 停止、 洗衣程序选择； 或者电脑的 键盘输入， 例如 Q、 W、 E、 R、 Fl、 Ctrl或者 Alt键功能等等。
金属导线 103, 位于所述板体 100工作面 I表面或者所述板体 100内部， 用于工作信号传输至处理芯片， 所述金属导线 103优选为铜线。
接口 102, 位于所述板体 100内部， 用于连接处理芯片。
需要指出的是所述板体 100的材质、形状和尺寸，侦测键 101选用的铜箔 厚度、 布局以及尺寸， 金属导线 103的材质、 厚度、 布局以及尺寸， 以及接口 102的位置和排列使得按键侦测板能够用作低频干扰检测的天线， 用于检测第 一频率段 (20KHz至 500KHz)的低频噪声信号， 且使得用户的点触的信号固定 在第二频率段 (80KHz至 120KHz)。
进一步的， 所述按键侦测板还包括平衡点 104, 所述平衡点 104用于辅助 按键侦测板适用作低频干扰检测的天线， 用于检测第一频率段 (20KHz 至 500KHz)的低频噪声信号，且使得用户的点触的信号固定在第二频率段 (80KHz 至 120KHz), 所述平衡点 104为金属点， 所述平衡点 104可以为额外制作在板 体 100内部的金属块、金属线； 优选的， 平衡点 104直接采用侦测键 101的连 接孔或者接口 102, 通过设计侦测键 101的连接孔或者接口 102的大小、 直径 等参数来辅助按键侦测板适用作低频干扰检测的天线。
当第一实施例按键侦测板与键盘装配用于接收用户指令时， 通过接口 102 和金属导线 103对所述侦测键 101进行充电产生源电场，且在侦测键 101表面 形成电荷累积区域， 所述源电场穿透各对应侦测键 101的部分键盘（绝缘介质 触摸面板）， 形成从各侦测键 101表面向外扩散的极化电场， 各电极的电荷累 积区域中累积达到平衡量的电荷。
其中， 所述各电极累积区域中累积达到平衡量的电荷是指： 在对各侦测键
101充电时， 各侦测键 101的电荷累积区域中开始累积电荷， 当某一时间， 各 侦测键 101的电荷累积区域无法在积聚更多电荷而要开始产生放电的时候，此 时各侦测键 101的电荷累积区域中累积的电荷达到了平衡量。
所述键盘（绝缘介质触摸面板）的材料可以为玻璃， 或者也可以为其他已 知的各种绝缘材料。
本发明第一实施例的按键侦测板结构具有以下功能，当要对具有所述侦测 键 101的触摸屏进行操作时，操作者的手指对电荷累积区域中电荷量的影响并 非是直接触摸带电荷的电极来实现的，而是接触了与电极没有连接关系的键盘 (绝缘介质触摸面板）， 甚至可能还未与键盘（绝缘介质触摸面板）接触。
导致上述情况出现的原理在于，当各侦测键 101在充电后各自产生了源电 场， 所述源电场为静电场， 其会穿透位于其电场范围内的键盘（绝缘介质触摸 面板）。 并且， 键盘（绝缘介质触摸面板） 由于所述穿透而被极化， 从而产生 极化电场。所述极化电场叠加到对应的源电场就是真实的电场分布。 当用户的 手指进入到极化电场中时，会使得所述真实的电场分布产生变化， 引发电荷累 积区域中电荷的转移， 从而电荷累积区域中电荷量发生了变化。
由此可以看出，一旦某个侦测键 101的电荷累积区域中发生了剧烈的电荷 量变化， 一般就可以认为所述侦测键 101对应的按键发生了触摸操作。 从而， 基于此情况就可通过对电荷累积区域进行电荷补充的方式来获得所述电荷量 变化的情况， 并确定电荷量变化最大的情况为触摸识别。 并且， 考虑到用户的 手指在触摸某一按键时， 不但所述触摸区域对应的极化电场会被影响， 其相邻 的侦测键 101对应的极化电场也会由于操作者的非触摸部分（其他手指、手掌 等）而收到影响。 因而， 也会引发相邻的侦测键 101对应的电极的电荷累计区 域中的电荷量发生变化。但是， 这种变化相对于触摸区域的变化一定是变化速 度较緩慢且相对变化量较少的， 因而在此前最大电荷变化量的基础上，再结合 电荷变化量与电荷平衡量的比值就可进行更准确的触摸识别。进一步地， 由于 本发明第一实施例的按键侦测板的侦测键 101位于工作面 I和邻面 Π, 使得位 于工作面 I和邻面 II侦测键 101都会形成电荷累积区域，在用户手指触摸某一 按键或者接近某一按键时， 用户的手指始终会垂直于该侦测键 101 的一个面 (工作面 I或者邻面 Π ), 使得该侦测键 101的电荷累积区域中电荷量变化量 比相邻的侦测键 101要高一个数量级以上，侦测键受干扰的程度大大降低， 进 一步提高按键分辨率。
本发明的发明人还提出一种优化的按键侦测板， 包括： 板体， 所述板体至 少有两个互相连接的面； 多个侦测键， 所述侦测键位于所述板体第一表面， 所 述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第二 表面，且所述第一表面和第二表面为板体的连接的两个表面，且侦测键的位于 第二表面的部分比所述第二表面凹进。
所述板体为 ITO 薄膜、 导电薄膜、 印刷电路板或者柔性印刷电路板， 所 述板体还包括位于板体内或者板体表面的、 与侦测键相连的金属导线，位于板 体内的、 通过金属导线与侦测键相连的端口， 所述端口用于连接处理芯片。
所述侦测键的位于第二表面的部分比所述第二表面 进的设计能够进一 步提高按键侦测板的分辨率和改善按键的抗干扰能力。
进一步的， 进所述第二表面的侦测键的部分的外周为弧形，且使得用户 点触时始终点触点位于弧形面的焦点， 这样， 本发明的按键侦测板与键盘装配 时， 侦测键有一个面垂直于键盘， 使得用户手指点触键盘的键时， 手指与键盘 的键对应的侦测键始终保持垂直， 当对应的侦测键接收到工作信号时， 工作信 号始终垂直对应的侦测键，提高按键侦测板的分辨率，从而改善按键的抗干扰 能力。且本发明的位于第二表面的侦测键的表面为弧形面，使得用户点触时始 终点触点位于弧形面的焦点，进一步提高按键侦测板的分辨率和改善按键的抗 干扰能力。
进一步的， 本发明的按键侦测板还可以作为处理芯片的侦测天线，通过选 择按键侦测板的材质，设置位于按键侦测板内的金属导线走向和厚度、侦测键 的排列和厚度以及端口的排列，使得按键侦测板能够探测设定第一频率段的频 率， 并且通过选择按键侦测板的材质，设置位于按键侦测板内的金属导线走向 和厚度、侦测键的排列和厚度以及端口的排列，使得用户的点触固定在第二频 率段， 降低分析芯片的分析难度。
下面结合一具体实施例对本发明按键侦测板做详细说明。
请参考图 3, 图 3为本发明按键侦测板第二实施例示意图， 包括： 板体 200, 所述板体 200可以为为 ITO薄膜、 导电薄膜、 印刷电路板或者 柔性印刷电路板， 在本实施例中， 选用印刷电路板， 所述板体 100为不规则扁 长方体， 具有工作面 I和邻面 Π, 所述工作面 I为平面， 所述邻面 II为凹面与 平面间隔连续的起伏面。 在本实施例中， 所述工作面 I 为第一表面， 邻面 II 为第二表面， 且所述工作面 I与邻面 II互相连接。
侦测键 201 ,用于侦测键盘 (未图示)接收到用户指令 (即用户点触），并将用 户指令转换为工作信号。工作信号通过金属导线 203传输至与接口 202连接的 处理芯片（未图示）， 所述侦测键 201为金属薄片， 在本实施例中，优选为铜箔。 所述侦测键 201位于工作面 I和邻面 Π,考虑到所述板体 200的邻面 II较狭长， 故所述侦测键 201在邻面 II的部分长度与邻面 II一致，从视觉上看侦测键 201 包覆部分邻面 II中的凹面 （包边 ), 使得侦测键 201在邻面 II为弧形面， 且所 述弧形面的焦点为用户点触点。侦测键 201选用的铜箔厚度以及具体形状需视 第一频率段和第二频率段而定， 在本实施例中， 第一频率段为 20KHz 至 500KHz,第一频率段为低频噪声信号频率段；第二频率段为 80KHz至 120KHz, 第二频率段为工作信号频率段。 还需要说明的是， 本实施中， 侦测键 101个数 为 6个， 对应为开始键、 停止键、 暂停键、 快进键、 快退键和音量键， 而在其 他实施方式中， 侦测键 201个数不限为 6个， 可以为 2个、 3个、 4个、 5个、 7个、 8个、 9个….32个，对应的功能也可以根据按键侦测板应用的范围而设， 例如电视的开启、 关闭、 频道选择； 或者微波炉的开启、 停止、 时间设定、 温 度设定； 或者洗衣机的开启、 停止、 洗衣程序选择； 或者电脑的键盘输入， 例 如0、 W、 E、 R、 Fl、 Ctrl或者 Alt键功能等等。
金属导线 203, 位于所述板体 200工作面 I表面或者所述板体 200内部， 用于工作信号传输至处理芯片， 所述金属导线 203优选为铜线。
接口 202位于所述板体 200内部， 用于连接处理芯片。
需要指出的是所述板体 200的材质、形状和尺寸，侦测键 201选用的铜箔 厚度、 布局以及尺寸， 金属导线 203的材质、 厚度、 布局以及尺寸， 以及接口 202的位置和排列使得按键侦测板能够用作低频干扰检测的天线， 用于检测第 一频率段 (20KHz至 500KHz)的低频噪声信号， 且使得用户的点触的信号固定 在第二频率段 (80KHz至 120KHz)。
进一步的， 所述按键侦测板还包括平衡点 204, 所述平衡点 204用于辅助 按键侦测板能够用作低频干扰检测的天线， 用于检测第一频率段 (20KHz 至 500KHz)的低频噪声信号，且使得用户的点触的信号固定在第二频率段 (80KHz 至 120KHz), 所述平衡点 204为金属点， 优选的， 平衡点 204为侦测键 201的 连接孔或者接口 202。
当第二实施例按键侦测板与键盘装配用于接收用户指令时，具体分析可以 参考第一实施例按键侦测板与键盘装配用于接收用户指令， 但需要说明的是， 第二实施例按键侦测板在使用时，在用户手指触摸某一按键或者接近某一按键 时， 不但具有用户的手指始终会垂直于该侦测键 201的一个面（工作面 I或者 邻面 Π ), 使得该侦测键 201的电荷累积区域中电荷量变化量比相邻的侦测键 201要高一个数量级以上， 侦测键受干扰的程度大大降低， 进一步提高按键分 辨率的优点， 而且侦测键 201在邻面 II为弧形面， 在用户手指触摸某一按键 或者接近某一按键时， 所述用户手指位置为弧形面焦点或者为接近弧形面焦 点，在用户触摸某一按键或者接近某一按键时， 进一步提高该侦测键 201的电 荷累积区域中电荷量变化量， 优化按键分辨率。
本发明的发明人还提出一种优化的按键侦测板， 包括： 板体， 所述板体至 少有两个互相连接的面； 多个侦测键， 所述侦测键位于所述板体第一表面， 所 述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第二 表面，且所述第一表面和第二表面为板体的连接的两个表面。且侦测键的位于 第二表面的部分突出所述第二表面。
本发明的侦测键的位于第二表面的部分突出所述第二表面，降低与按键侦 测板连接的微控制器（ MCU, Micro Controller Unit )计算侦测键的信号变化的 计算量， 即侦测键的电荷变化计算量， 从而提高按键反应速度和分辨率。
下面结合一具体实施例对本发明按键侦测板做详细说明。
请参考图 4, 图 4为本发明按键侦测板第三实施例示意图， 包括： 板体 300 , 所述板体 300可以为印刷电路板或者柔性印刷电路板， 在本实 施例中，选用印刷电路板，所述板体 300为扁长方体，具有工作面 I和邻面 II, 在本实施例中， 所述工作面 I为第一表面， 邻面 II为第二表面， 且所述工作面 I与邻面 II互相连接。
侦测键 301 ,用于侦测键盘 (未图示)接收到用户指令 (即用户点触），并将用 户指令转换为工作信号。工作信号通过金属导线 303传输至与接口 302连接的 处理芯片（未图示）， 所述侦测键 301为金属薄片， 在本实施例中，优选为铜箔。 所述侦测键 301位于工作面 I和邻面 Π ,且位于邻面 II的侦测键 301的凸出邻 面 II。 在本实施例中， 所述侦测键 301会将户的点触的信号传输至与按键侦测 板连接的微控制器， 通过微控制器计算侦测键的信号变化， 而凸出邻面 II 的 侦测键 301能够有效降低微控制器计算量，提高采用本发明按键侦测板的分辨 率。 所述侦测键 301为金属块或者金属薄片， 在本实施例中， 优选为铜箔。 侦 测键 301选用的铜箔厚度以及具体形状需视第一频率段和第二频率段而定，在 本实施例中， 第一频率段为 20ΚΗζ至 500ΚΗζ, 第一频率段为低频噪声信号频 率段； 第二频率段为 80ΚΗζ至 120ΚΗζ, 第二频率段为工作信号频率段。
金属导线 303, 位于所述板体 300工作面 I表面或者所述板体 300内部， 用于工作信号传输至处理芯片， 所述金属导线 303优选为铜线。
接口 302位于所述板体 300内部， 用于连接处理芯片。
需要指出的是所述板体 300的材质、形状和尺寸，侦测键 301选用的铜箔 厚度、 布局以及尺寸， 金属导线 303的材质、 厚度、 布局以及尺寸， 以及接口 302的位置和排列使得按键侦测板能够用作低频干扰检测的天线， 用于检测第 一频率段 (20ΚΗζ至 500ΚΗζ)的低频噪声信号， 且使得用户的点触的信号固定 在第二频率段 (80ΚΗζ至 120ΚΗζ)。
进一步的， 所述按键侦测板还包括平衡点 304, 所述平衡点 304用于辅助 按键侦测板能够用作低频干扰检测的天线， 用于检测第一频率段 (20ΚΗζ 至 500ΚΗζ)的低频噪声信号，且使得用户的点触的信号固定在第二频率段 (80ΚΗζ 至 120ΚΗζ), 所述平衡点 304为金属点， 优选的， 平衡点 304为侦测键 301的 连接孔或者接口 302。
还需要指出的是，在其他实施例中， 进所述第二表面的侦测键的部分的 外周为弧形，所述 进所述第二表面的侦测键的部分的外周为弧形的形状能够 有效降低与按键侦测板连接的微控制器（MCU, Micro Controller Unit )计算侦 测键的信号变化的计算量。
当第三实施例按键侦测板与键盘装配用于接收用户指令时，具体分析可以 参考第一实施例和第二实施例按键侦测板与键盘装配用于接收用户指令，但需 要说明的是，位于邻面 II的侦测键 301的凸出邻面 Π,在用户手指触摸某一按 键或者接近某一按键时， 使得该侦测键 301 的电荷累积区域中电荷量变化量 大， 而相邻的侦测键 301的电荷累积区域中电荷量变化量小，侦测键受干扰的 程度大大降低， 进一步提高按键分辨率的优点。
本发明的发明人还提出一种优化的按键侦测板， 包括： 板体， 所述板体至 少有两个互相连接的面； 多个侦测键， 所述侦测键位于所述板体第一表面， 所 述板体第一表面为平行于金属布线面的表面；所述侦测键还位于所述板体第二 表面，且所述第一表面和第二表面为板体的连接的两个表面。且所述板体为由 突出部和凹进部交错构成的锯齿形，所述侦测键位于所述板体的突出部的第一 表面以及位于突出部的第二表面。
本发明的侦测键位于所述突出部第一表面和第二表面，不但降低与按键侦 测板连接的微控制器计算侦测键的信号变化的计算量，即侦测键的电荷变化计 算量，从而提高按键反应速度和分辨率； 而且侦测键与相邻的侦测键之间具有 空气作为隔断， 使得侦测键受干扰的程度大大降低， 进一步提高按键分辨率。
请参考图 5 , 图 5为本发明按键侦测板第四实施例示意图， 包括： 板体 400 , 所述板体 400可以为印刷电路板或者柔性印刷电路板， 在本实 施例中，选用印刷电路板。所述板体 400为由突出部 420和凹进部 430交错构 成的锯齿形， 所述板体 400还包括本体部 410。
观察图 5可知， 板体 400呈 "长城" 状， 本体部 410为扁长方体， 突出部 420为长城的城垛， 突出部 420数量为 7个。 在其它实施例中， 突出部 420数 量可以为 3个、 5个、 9个、 11个。 单个突出部 420为长方体。 所述包括本体 部 410和突出部 420的板体 400可以对印刷电路板或者柔性印刷电路板直接加 工获得。
侦测键 401 ,用于侦测键盘 (未图示)接收到用户指令 (即用户点触），并将用 户指令转换为工作信号。工作信号通过金属导线 403传输至与接口 402连接的 处理芯片（未图示)。所述侦测键 401位于所述突出部 420第一表面和第二表面， 且所述第一表面和第二表面为互相连接的两个面。 所述侦测键 401 为金属薄 片， 在本实施例中， 优选为铜箔。 所述侦测键 401位于突出部 420的一个表面 和与该表面相邻的邻面，所述侦测键 401位于突出部 420的一个表面即为所述 板体 400的第一表面，通常为平行于印刷电路板内金属布线面的表面， 所述侦 测键 401位于突出部 420的另一个表面即为所述板体 400的第二表面。
且所述侦测键 101在邻面的部分长度与邻面一致， 从视觉上看侦测键 401 包覆突出部 420的邻面 （包边）， 但侦测键 401包覆部分邻面也不影响其使用 效果。侦测键 401选用的铜箔厚度以及具体形状需视第一频率段和第二频率段 而定， 在本实施例中， 第一频率段为 20KHz至 500KHz, 第一频率段为低频噪 声信号频率段； 第二频率段为 80KHz至 120KHz, 第二频率段为工作信号频率 段。
金属导线 403 , 位于所述板体 400表面或者所述板体 300内部， 用于工作 信号传输至处理芯片， 所述金属导线 403优选为铜线。
接口 402位于所述板体 400内部， 用于连接处理芯片。
需要指出的是所述板体 400的材质、形状和尺寸，侦测键 401选用的铜箔 厚度、 布局以及尺寸， 金属导线 403的材质、 厚度、 布局以及尺寸， 以及接口 402的位置和排列使得按键侦测板能够用作低频干扰检测的天线， 用于检测第 一频率段 (20KHz至 500KHz)的低频噪声信号， 且使得用户的点触的信号固定 在第二频率段 (80KHz至 120KHz)。
进一步的， 所述按键侦测板还包括平衡点 404, 所述平衡点 404用于辅助 按键侦测板能够用作低频干扰检测的天线， 用于检测第一频率段 (20KHz 至 500KHz)的低频噪声信号，且使得用户的点触的信号固定在第二频率段 (80KHz 至 120KHz), 所述平衡点 404为金属点， 优选的， 平衡点 404为侦测键 401的 连接孔或者接口 402。
当第四实施例按键侦测板与键盘装配用于接收用户指令时，具体分析可以 参考第一实施例、第二实施例和第三实施例按键侦测板与键盘装配用于接收用 户指令，但需要说明的是， 所述侦测键 401位于突出部 420的一个表面和与该 表面相邻的邻面，在用户手指触摸某一按键或者接近某一按键时，使得该侦测 键 401的电荷累积区域中电荷量变化量大，而相邻的侦测键 401的电荷累积区 域中电荷量变化量小，侦测键受干扰的程度大大降低， 进一步提高按键分辨率 的优点。
本发明虽然已以较佳实施例公开如上，但其并不是用来限定本发明，任何 本领域技术人员在不脱离本发明的精神和范围内，都可以利用上述揭示的方法 和技术内容对本发明技术方案做出可能的变动和修改， 因此， 凡是未脱离本发 改、 等同变化及修饰， 均属于本发明技术方案的保护范围。

Claims

利 要
1. 一种按键侦测板， 包括：
板体， 所述板体至少有两个互相连接的面；
多个侦测键， 所述侦测键位于所述板体第一表面， 所述板体第一表面为平 行于金属布线面的表面；
其特征在于，
所述侦测键还位于所述板体第二表面，且所述第一表面和第二表面为板体 的连接的两个表面。
2. 如权利要求 1所述的按键侦测板， 其特征在于，侦测键的位于第二表面的 部分与所述第二表面齐平。
3. 如权利要求 1所述的按键侦测板， 其特征在于，侦测键的位于第二表面的 部分突出所述第二表面。
4. 如权利要求 3所述的按键侦测板， 其特征在于， 突出所述第二表面的侦测 键的部分的外周为弧开;
5. 如权利要求 1所述的按键侦测板， 其特征在于，侦测键的位于第二表面的 部分比所述第二表面凹进。
6. 如权利要求 5所述的按键侦测板， 其特征在于， 凹进所述第二表面的侦测 键的部分的外周为弧开; !P1
7. 如权利要求 5所述的按键侦测板， 其特征在于， 凹进所述第二表面的侦测 键的部分的外周为弧形， 所述弧形面的焦点为用户点触点。
8. 如权利要求 1所述的按键侦测板， 其特征在于， 所述板体为由突出部和凹 进部交错构成的锯齿形，所述侦测键位于所述板体的突出部的第一表面以及位 于突出部的第二表面。
9. 如权利要求 1至 6中任一项的所述的按键侦测板， 其特征在于， 还包括： 位于所述板体内部的接口和位于所述板体内部的平衡点。
10. 如权利要求 7所述的按键侦测板， 其特征在于， 所述平衡点为所述接口或 者为侦测键的连接孔。
11. 如权利要求 1至 6中任一项的所述的按键侦测板，其特征在于，所述板体 为 ITO薄膜、 印刷电路板或者柔性印刷电路板。
PCT/CN2010/079462 2010-09-30 2010-12-06 按键侦测板 WO2012040976A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010514747 2010-09-30
CN201010514747.0 2010-09-30

Publications (1)

Publication Number Publication Date
WO2012040976A1 true WO2012040976A1 (zh) 2012-04-05

Family

ID=43813166

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/079462 WO2012040976A1 (zh) 2010-09-30 2010-12-06 按键侦测板

Country Status (2)

Country Link
CN (1) CN102006047B (zh)
WO (1) WO2012040976A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204026535U (zh) * 2013-12-31 2014-12-17 广州奥迪通用照明有限公司 一种光源板定位结构及照明装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101064222A (zh) * 2006-04-25 2007-10-31 米迪亚系统科技股份有限公司 触控按键模块
CN101324805A (zh) * 2007-06-13 2008-12-17 博西华电器（江苏）有限公司 触摸式按键结构以及使用该触摸式按键结构的家用电器
CN201518477U (zh) * 2009-09-25 2010-06-30 赣州市英唐电子科技有限公司 触摸按键的感应结构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101098635B1 (ko) * 2004-02-13 2011-12-23 큐알쥐 리미티드 정전용량 센서
CN201426116Y (zh) * 2009-05-21 2010-03-17 科晶馨科技股份有限公司 电容式键盘的薄膜电路板结构

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101064222A (zh) * 2006-04-25 2007-10-31 米迪亚系统科技股份有限公司 触控按键模块
CN101324805A (zh) * 2007-06-13 2008-12-17 博西华电器（江苏）有限公司 触摸式按键结构以及使用该触摸式按键结构的家用电器
CN201518477U (zh) * 2009-09-25 2010-06-30 赣州市英唐电子科技有限公司 触摸按键的感应结构

Also Published As

Publication number Publication date
CN102006047B (zh) 2016-06-29
CN102006047A (zh) 2011-04-06

Similar Documents

Publication Publication Date Title
CN107710115B (zh) 触控响应模组、键盘、触控装置、具反馈功能的触控设备
WO2013082838A1 (zh) 电容触摸按键系统
EP2657817B1 (en) Touch screen device and method thereof for sensing approach
WO2003056422A1 (en) A touch control display screen with a built-in electromagnet induction layer of septum array grids
WO2012075732A1 (zh) 一种应用于数字终端的输入方法及装置
CN108733249B (zh) 手持式电子装置、触控侦测器及其触控侦测方法
JP2017507416A (ja) ジェスチャ制御のためのシステムおよび方法
TW201104525A (en) Determinative method and device of touch point movement
CN103034378A (zh) 电容感测电路、方法和具有导电接触表面的系统
WO2013075345A1 (zh) 触摸识别方法及装置、空间鼠标及其控制方法
WO2021083334A1 (zh) 电子设备及其控制方法
CN110267143A (zh) 一种触摸检测装置及耳机
CN106095282A (zh) 按键装置的触控操作方法、按键装置及终端
WO2013060057A1 (zh) 触摸按键结构及触摸装置
CN104850279B (zh) 一种声波触控装置及电子设备
KR101202414B1 (ko) 터치입력 인식장치 및 그 방법
CN102006046B (zh) 按键侦测板
CN207588830U (zh) 一种触摸按键
WO2012040976A1 (zh) 按键侦测板
WO2022111285A1 (zh) 用于电子雾化的电池杆及电子雾化装置
CN214257964U (zh) 用于电子雾化的电池杆及电子雾化装置
CN102386007A (zh) 按键系统
CN102082567B (zh) 金属过孔按键侦测板
CN102006048B (zh) 按键侦测板
CN107566566A (zh) 移动终端后盖及移动终端

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10857739

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10857739

Country of ref document: EP

Kind code of ref document: A1