CN210467654U - Keyboard circuit and keyboard - Google Patents
Keyboard circuit and keyboard Download PDFInfo
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- CN210467654U CN210467654U CN201921536950.0U CN201921536950U CN210467654U CN 210467654 U CN210467654 U CN 210467654U CN 201921536950 U CN201921536950 U CN 201921536950U CN 210467654 U CN210467654 U CN 210467654U
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- keyboard
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Abstract
A keyboard circuit and a keyboard are characterized in that a reference module, a plurality of switch modules, a plurality of LED packaging bodies integrally packaged with a resistance module and an LED module and a control module are adopted to form a keyboard scanning matrix, so that the control module can decode information of keys corresponding to the switch modules according to new resistance value signals formed by reference resistance values of the reference module and resistance values provided by the corresponding resistance modules, the key failure is avoided, the keyboard circuit has a colorful atmosphere by adding the plurality of LED modules, and the resistance modules and the LED modules are respectively packaged in the LED packaging bodies, so that the circuit space is saved, the manufacturing process is simplified, namely the keyboard circuit in the embodiment simultaneously realizes the prevention of failed keys, the colorful atmosphere and the lightening and is avoided, and the problem that the key failure prevention is difficult to simultaneously realized, the keyboard circuit in the traditional technical scheme is avoided, The problems of colorful atmosphere and light and thin are solved.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, especially, relate to a keyboard circuit and keyboard.
Background
At present, traditional keyboard circuit generally includes a plurality of auxiliary resistor in order to avoid appearing the malfunctioning condition of button, and often can add the LED light source in order to build the various atmosphere of dazzling in the keyboard circuit, but if need make the keyboard circuit possess simultaneously and prevent that the button is malfunctioning and dazzle various atmosphere, then the keyboard is difficult to realize frivolousization.
Therefore, the problems that the key failure prevention, the colorful atmosphere and the light and thin performance are difficult to achieve simultaneously exist in the traditional technical scheme.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a keyboard circuit and keyboard aims at solving the difficult problem that realizes preventing the button failure simultaneously, possess and dazzle various atmosphere and frivolous that exists among the traditional technical scheme.
The utility model discloses a first aspect of the embodiment provides a keyboard circuit, include:
the reference module is connected with a reference potential and is used for providing a reference resistance value;
the switch modules are respectively in one-to-one correspondence with the keys on the keyboard;
the LED light source comprises a plurality of LED packaging bodies, each LED packaging body is integrally packaged with an LED module and a resistor module, each LED module is used for providing an LED light source, each resistor module is respectively connected with each switch module in series, and each resistor module is used for providing a resistance value not less than 1 kilohm when the switch modules are switched on; and
the control module is connected with the reference module, each switch module and each resistor module are respectively connected between a plurality of input ends and a plurality of output ends of the control module, and the control module is used for decoding information of the key corresponding to the switch module according to a new resistance value signal formed by the reference resistance value and the corresponding resistance value provided by the resistor module when the switch module is switched on.
In one embodiment, the switch module is turned on by pressing a corresponding key on the keyboard.
In one embodiment, each of the resistor modules includes a level resistor, and a resistance value of each of the level resistors is not less than 3 k Ω.
In one embodiment, each of the LED modules includes a first light emitting diode, a second light emitting diode, and a third light emitting diode, wherein a positive electrode of the first light emitting diode, a positive electrode of the second light emitting diode, and a positive electrode of the third light emitting diode are commonly connected as a positive input terminal of the LED package, a negative electrode of the first light emitting diode is a first negative output terminal of the LED package, a negative electrode of the second light emitting diode is a second negative output terminal of the LED package, a negative electrode of the third light emitting diode is a third negative output terminal of the LED package, a first end of the level resistor is a resistor input terminal of the LED package, and a second end of the level resistor is a resistor output terminal of the LED package.
In one embodiment, each of the LED packages further encapsulates a driving module, each of the driving modules is respectively connected to the control module and each of the LED modules, and each of the driving modules is configured to respectively drive each of the LED modules under the control of the control module.
In one embodiment, each of the driving modules includes a driving chip, and each of the resistance modules includes a level resistor, and a resistance value of each of the level resistors is not less than 3 k Ω.
In one embodiment, each of the LED modules includes a fourth light emitting diode, a fifth light emitting diode and a sixth light emitting diode, a data input terminal of the driver chip is used as a data input terminal of the LED package, a power terminal of the driver chip is used as a power input terminal of the LED package, a data output terminal of the driver chip is used as a data output terminal of the LED package, a driving output terminal of the driver chip is respectively connected to an anode of the fourth light emitting diode, an anode of the fifth light emitting diode and an anode of the sixth light emitting diode, a ground terminal of the driver chip, a cathode of the fourth light emitting diode, a cathode of the fifth light emitting diode and a cathode of the sixth light emitting diode are commonly connected as a ground terminal of the LED package, a first terminal of the level resistor is used as a resistor input terminal of the LED package, the second end of the quasi-position resistor is used as the resistor output end of the LED packaging body.
A second aspect of the embodiments of the present invention provides a keyboard, including the keyboard circuit as described above.
The keyboard circuit comprises a keyboard scanning matrix which is composed of a reference module, a plurality of switch modules, a plurality of LED packaging bodies which are integrally packaged with a resistance module and an LED module, and a control module, so that the control module can decode information of the keys corresponding to the switch modules according to new resistance value signals formed by the reference resistance value of the reference module and the resistance value provided by the corresponding resistance module, thereby avoiding the key failure, and the keyboard circuit has a colorful atmosphere by adding the plurality of LED modules, and the keyboard circuit saves circuit space, simplifies the manufacturing process and lightens the keyboard by respectively packaging each resistance module and each LED module in each LED packaging body, namely the keyboard circuit in the embodiment simultaneously realizes the prevention of the key failure, the colorful atmosphere and the lightening and thinning, the problems that the key failure prevention, colorful atmosphere and light and thin effects are difficult to achieve simultaneously in the traditional technical scheme are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a keyboard circuit according to an embodiment of the present invention;
FIG. 2 is an exemplary electrical schematic diagram of an LED package in the keyboard circuit of FIG. 1;
fig. 3 is another schematic circuit diagram of a keyboard circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a circuit diagram of a keyboard circuit according to a first aspect of the embodiment of the present invention is shown, for convenience of illustration, only the portion related to the embodiment is shown, and detailed as follows:
the keyboard circuit in this embodiment includes: the keyboard comprises a reference module 100, a plurality of switch modules, a plurality of LED packaging bodies and a control module 400, wherein the reference module 100 is connected with a reference potential Vref, each switch module corresponds to each key on the keyboard one by one, each LED packaging body is integrally packaged with an LED module and a resistor module, each resistor module is connected with each switch module in series, the control module 400 is connected with the reference module 100, and each switch module and each resistor module are connected between a plurality of input ends and a plurality of output ends of the control module 400; the reference module 100 is used for providing a reference resistance value; each LED module is used for providing an LED light source; each resistance module is used for providing a resistance value not less than 1 kiloohm when the corresponding switch module is switched on; the control module 400 is configured to decode information of the key corresponding to the switch module according to a new resistance value signal formed by the reference resistance value and the resistance value provided by the corresponding resistance module when the switch module is turned on.
It should be understood that fig. 1 only shows a 2 x 2 keyboard scan matrix made up of 2 inputs and 2 outputs of the control module 400, thus only the first switch module 210, the second switch module 220, the third switch module 230, the fourth switch module 240, the first LED package 310, the second LED package 320, the third LED package 330 and the fourth LED package 340 of the keyboard scan matrix are shown, the first LED package 310 integrally encapsulates the first LED module 312 and the first resistor module 311, the second LED package 320 integrally encapsulates the second LED module 322 and the second resistor module 321, the third LED package 330 integrally encapsulates the third LED module 332 and the third resistor module 331, and the fourth LED package 340 integrally encapsulates the fourth LED module 342 and the fourth resistor module 341, it should be understood that the connection principle of the keyboard circuit of the keyboard scanning matrix N × M (N is greater than or equal to 2, M is greater than or equal to 2) can be seen in fig. 1.
It should be understood that the reference module 100 in the present embodiment may be constituted by at least one resistor; the switch module in this embodiment may be constituted by a mechanical switch; the resistor module in this embodiment may be formed by at least one level resistor, such as a package resistor or a wafer soldering resistor; the control module 400 in this embodiment may be constituted by a microprocessor, for example, an STM32 series single chip microcomputer; the LED module in this embodiment may be composed of a plurality of light emitting diodes. It should be understood that the present embodiment may further include a driving module for driving the LED modules, where the driving module may be formed by a driving chip, and the number of the driving modules may be the same as or less than the number of the LED modules, that is: one driving module can be used for driving one LED module, or one driving module can be used for driving a plurality of LED modules.
It is understood that the resistor module and the LED module may be encapsulated in the LED package by using a Molding (Molding) silicone encapsulation process or a conventional dispensing encapsulation process.
It should be understood that, in this embodiment, each of the resistor modules is respectively configured to provide a resistance value with a resistance value of 1 kilohm or more, so that a new resistance value signal formed by the resistance value provided by the resistor module correspondingly connected to the switch module and the reference resistance value is more highly distinguished from the reference resistance value, thereby improving the sensitivity of the control module 400 in identifying the key information and preventing the key failure. It should be understood that in other embodiments, each of the resistor modules may be configured to provide a resistance value of 3 kilo-ohms or more,
in the keyboard circuit in this embodiment, the reference module 100, the plurality of switch modules, the plurality of LED packages integrally packaged with the resistor module and the LED module, and the control module 400 form a keyboard scanning matrix, so that the control module 400 can decode information of the keys corresponding to the switch modules according to a new resistance signal formed by the resistance of the reference module 100 and the resistance of the resistor module, which is more than 1 kilohm, and more preferably more than 3 kilohm, thereby preventing the keys from malfunctioning, and the keyboard has a colorful atmosphere by adding the plurality of LED modules, and the keyboard has the advantages of space saving, simplified manufacturing process, and lighter and thinner keyboards, i.e. the keyboard circuit in this embodiment simultaneously prevents the keys from malfunctioning, has the colorful atmosphere and is lighter and thinner, the problems that the key failure prevention, colorful atmosphere and light and thin effects are difficult to achieve simultaneously in the traditional technical scheme are avoided.
In one embodiment, each switch module is turned on by pressing the corresponding key on the keyboard. It should be understood that each switch module includes a switch such as a push button switch or a membrane switch.
In one embodiment, the control module 400 includes a microprocessor, it being understood that the microprocessor in this embodiment may be a single chip microcomputer of the STM32 family, and in other embodiments, other types of microprocessors may be used.
In one embodiment, referring to fig. 2, each of the resistor modules includes a level resistor R, and a resistance value of each of the level resistors R is not less than 1 kilo-ohm, for example, more than 3 kilo-ohm, it should be understood that in this embodiment, each of the resistor modules includes a resistor having a resistance value of more than 3 kilo-ohm, in other embodiments, the resistor modules may include a plurality of resistors connected in series, the resistance values of the resistors connected in series may be different, but a total resistance value of the resistors connected in series is more than 3 kilo-ohm.
In one embodiment, referring to fig. 2, fig. 2 is a circuit diagram of the first LED package 310, each of the LED modules includes a first LED D1, a second LED D2, a third LED D3, an anode of the first LED D1, the anode of the second light emitting diode D2 and the anode of the third light emitting diode D3 are connected together as a positive input terminal (COM + terminal) of the LED package, the cathode of the first light emitting diode D1 is used as a first negative output terminal (R-terminal) of the LED package, the cathode of the second light emitting diode D2 is used as a second negative output terminal (G-terminal) of the LED package, the cathode of the third light emitting diode D3 is used as a third negative output terminal (B-terminal) of the LED package, the first end of the level resistor R is used as a resistor input terminal (R1 terminal) of the LED package, and the second end of the level resistor R is used as a resistor output terminal (R2 terminal) of the LED package.
It should be understood that the first light emitting diode D1, the second light emitting diode D2, and the third light emitting diode D3 in the present embodiment may emit red light (R), green light (G), and blue light (B), respectively, that is, the light source provided by the LED package in the present embodiment is an RGB light source, so that the keyboard circuit in the present embodiment may create a more colorful atmosphere.
Referring to fig. 3, in an embodiment, each of the LED packages further encapsulates a driving module, each of the driving modules is respectively connected to the control module 400 and each of the LED modules, and each of the driving modules is configured to respectively drive each of the LED modules under the control of the control module 400.
It should be understood that each driving module includes a driving chip, each resistance module includes a level resistor, and a resistance value of each level resistor is not less than 1 kilo-ohm, and more preferably, is more than 3 kilo-ohm. The model of the driving chip in this embodiment is LM3402, and in other embodiments, LED driving chips of other models may also be used. The driving module may be packaged in the LED package by using a Molding (Molding) silicone packaging process or a conventional dispensing packaging process.
In one embodiment, each LED module includes a fourth light emitting diode, a fifth light emitting diode and a sixth light emitting diode, the fourth light emitting diode, the fifth light emitting diode and the sixth light emitting diode can respectively emit red light (R), green light (G) and blue light (B), a data input terminal of the driver chip serves as a data input terminal of the LED package, a power terminal of the driver chip serves as a power input terminal of the LED package, a data output terminal of the driver chip serves as a data output terminal of the LED package, a driving output terminal of the driver chip is respectively connected to an anode of the fourth light emitting diode, an anode of the fifth light emitting diode and an anode of the sixth light emitting diode, a ground terminal of the driver chip, a cathode of the fourth light emitting diode, a cathode of the fifth light emitting diode and a cathode of the sixth light emitting diode are commonly connected as a ground terminal of the LED package, the first end of the quasi-position resistor R is used as the resistor input end of the LED packaging body, and the second end of the quasi-position resistor R is used as the resistor output end of the LED packaging body.
It should be understood that, in this embodiment, by encapsulating the driving chip in the LED package, the driving and light emitting source integrated type is realized, and by respectively connecting the driving output end of the driving chip with the anode of the fourth light emitting diode, the anode of the fifth light emitting diode, and the anode of the sixth light emitting diode, the driving chip can individually control each light emitting diode, so as to realize single-point single control.
It should be understood that in other embodiments, other wiring patterns may be used to package the driver chip in the LED package.
A second aspect of the embodiments of the present invention provides a keyboard, including as the keyboard circuit of the first aspect of the embodiments of the present invention.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A keyboard circuit, comprising:
the reference module is connected with a reference potential and is used for providing a reference resistance value;
the switch modules are respectively in one-to-one correspondence with the keys on the keyboard;
the LED light source comprises a plurality of LED packaging bodies, each LED packaging body is integrally packaged with an LED module and a resistor module, each LED module is used for providing an LED light source, each resistor module is respectively connected with each switch module in series, and each resistor module is used for providing a resistance value not less than 1 kilohm when the switch modules are switched on; and
the control module is connected with the reference module, each switch module and each resistor module are respectively connected between a plurality of input ends and a plurality of output ends of the control module, and the control module is used for decoding information of the key corresponding to the switch module according to a new resistance value signal formed by the reference resistance value and the corresponding resistance value provided by the resistor module when the switch module is switched on.
2. The keyboard circuit of claim 1, wherein the switch module is turned on by pressing a corresponding key on the keyboard.
3. The keyboard circuit according to claim 1, wherein each of the resistor modules comprises a level resistor, and a resistance value of each of the level resistors is not less than 3 kilo-ohms.
4. The keyboard circuit of claim 3, wherein each of the LED modules comprises a first LED, a second LED and a third LED, wherein an anode of the first LED, an anode of the second LED and an anode of the third LED are commonly connected as a positive input terminal of the LED package, a cathode of the first LED is used as a first negative output terminal of the LED package, a cathode of the second LED is used as a second negative output terminal of the LED package, a cathode of the third LED is used as a third negative output terminal of the LED package, a first end of the level resistor is used as a resistor input terminal of the LED package, and a second end of the level resistor is used as a resistor output terminal of the LED package.
5. The keyboard circuit of claim 1, wherein each of the LED packages further encapsulates a driving module, each of the driving modules is connected to the control module and each of the LED modules, and each of the driving modules is configured to drive each of the LED modules under the control of the control module.
6. The keyboard circuit according to claim 5, wherein each of the driving modules includes a driving chip, each of the resistance modules includes a level resistor, and a resistance value of each of the level resistors is not less than 3 kilo-ohms.
7. The keyboard circuit of claim 6, wherein each of the LED modules comprises a fourth LED, a fifth LED and a sixth LED, the data input terminal of the driver chip is used as the data input terminal of the LED package, the power terminal of the driver chip is used as the power input terminal of the LED package, the data output terminal of the driver chip is used as the data output terminal of the LED package, the driving output terminal of the driver chip is respectively connected to the anode of the fourth LED, the anode of the fifth LED and the anode of the sixth LED, the ground terminal of the driver chip, the cathode of the fourth LED, the cathode of the fifth LED and the cathode of the sixth LED are commonly connected as the ground terminal of the LED package, the first terminal of the level resistor is used as the resistor input terminal of the LED package, the second end of the quasi-position resistor is used as the resistor output end of the LED packaging body.
8. A keyboard comprising a keyboard circuit according to any one of claims 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921536950.0U CN210467654U (en) | 2019-09-12 | 2019-09-12 | Keyboard circuit and keyboard |
| TW108216171U TWM599019U (en) | 2019-09-12 | 2019-12-04 | Keyborad circuit and keyborad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921536950.0U CN210467654U (en) | 2019-09-12 | 2019-09-12 | Keyboard circuit and keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210467654U true CN210467654U (en) | 2020-05-05 |
Family
ID=70433186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921536950.0U Expired - Fee Related CN210467654U (en) | 2019-09-12 | 2019-09-12 | Keyboard circuit and keyboard |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN210467654U (en) |
| TW (1) | TWM599019U (en) |
-
2019
- 2019-09-12 CN CN201921536950.0U patent/CN210467654U/en not_active Expired - Fee Related
- 2019-12-04 TW TW108216171U patent/TWM599019U/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TWM599019U (en) | 2020-07-21 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200505 |
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| CF01 | Termination of patent right due to non-payment of annual fee |