CN210324106U - Keyboard circuit and keyboard - Google Patents
Keyboard circuit and keyboard Download PDFInfo
- Publication number
- CN210324106U CN210324106U CN201920767996.7U CN201920767996U CN210324106U CN 210324106 U CN210324106 U CN 210324106U CN 201920767996 U CN201920767996 U CN 201920767996U CN 210324106 U CN210324106 U CN 210324106U
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- switch
- keyboard
- output
- transmission line
- keyboard circuit
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Abstract
The utility model discloses a keyboard circuit and keyboard, keyboard circuit, include: input, N output, N transmission line and switch, wherein: the N transmission lines are mutually independent, and each transmission line is provided with a switch; the output end is connected with the N output ends through the N transmission lines. By adopting the scheme, the transmission lines corresponding to the output ends in the keyboard circuit are mutually independent, so that the ghost key condition can be avoided.
Description
Technical Field
The utility model relates to an electronic equipment field especially relates to a keyboard circuit and keyboard.
Background
Nowadays, people use keyboards for a long time during their work and life, and thus the demand for keyboards is increasing.
In the prior art, a keyboard circuit is used in a matrix mode, and transmission lines corresponding to output ends of the keyboard circuit have intersections, so that Ghost keys (Ghost keys) are easily generated.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to prior art's defect, the utility model aims at providing a keyboard circuit and keyboard, the transmission line mutual independence that each output corresponds in the keyboard circuit can avoid the emergence of ghost key condition.
The technical scheme is as follows: the utility model provides a keyboard circuit, include: input, N output, N transmission line and switch, wherein:
the N transmission lines are mutually independent, and each transmission line is provided with a switch;
the output end is connected with the N output ends through the N transmission lines.
Specifically, the method comprises the following steps: the microprocessor is used for inputting detection signals to the input end and receiving the detection signals output by the output end; the closed state of the switch on the corresponding transmission line is determined by the output terminal outputting the detection signal.
The utility model also provides a keyboard, include: the utility model provides an arbitrary kind of keyboard circuit.
Specifically, the key position is included: the switch is used for driving the corresponding switch to be closed when being subjected to external force; the microprocessor is used for determining whether the key position is activated or not according to the closing state of the switch.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is as follows showing: the transmission lines corresponding to the output ends in the keyboard circuit are mutually independent, and the keyboard adopting the keyboard circuit can avoid ghost keys.
Drawings
Fig. 1 is a schematic circuit diagram of a keyboard circuit provided in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, it is a schematic circuit diagram of a keyboard circuit provided in an embodiment of the present invention, specifically including: input, N output, N transmission line and switch, wherein:
the N transmission lines are mutually independent, and each transmission line is provided with a switch;
the output end is connected with the N output ends through the N transmission lines.
In a specific implementation, the transmission lines are independent of each other, i.e., there is no intersection between each transmission line.
In concrete implementation, compare the keyboard circuit who adopts the matrix mode among the prior art, because the utility model provides a do not have the nodical between the transmission line among the keyboard circuit, consequently can avoid under the equal closed condition of a plurality of switches, because nodical between the transmission line, the transmission line that other closed switches correspond, with signal transmission to the circuit that does not have closed switch to correspond, output at last, lead to mistakenly will not have closed switch to judge as the closure state, ghost key phenomenon promptly.
In specific implementation, the value corresponding to N in the embodiment shown in fig. 1 is 4, and the value of N may also be other values, and specifically, the user may perform corresponding setting according to an actual application scenario.
In an embodiment of the present invention, the keyboard circuit further includes: a microprocessor (not shown in fig. 1) for inputting the detection signal to the input terminal and receiving the detection signal output from the output terminal; the closed state of the switch on the corresponding transmission line is determined by the output terminal outputting the detection signal.
For example, when the switch a is closed, the switch B, the switch C, and the switch D are in an open state, the input terminal inputs the detection signal, the output terminal 4 outputs the detection signal, and the microprocessor receives the detection signal output by the output terminal 4, so that the microprocessor can determine that the switch a on the transmission line corresponding to the output terminal 4 is in a closed state.
For example, the switch B and the switch C are simultaneously closed, the switch a and the switch D are in an open state, the input end inputs the detection signal, the output end 2 and the output end 5 output the detection signal, and the microprocessor receives the detection signal output by the output end 2 and the output end 5, so that the microprocessor can determine that the switch B and the switch C on the transmission line corresponding to the output end 2 and the output end 5 are in a closed state.
The embodiment of the utility model provides an in still provide a keyboard, include: the embodiment of the utility model provides an in the keyboard circuit that provides.
In the embodiment of the utility model, the keyboard includes the key position: the switch is used for driving the corresponding switch to be closed when being subjected to external force; the microprocessor is used for determining whether the key position is activated or not according to the closing state of the switch.
For example, the key corresponding to the switch a is driven by an external force to close the switch a, the keys corresponding to the switch B, the switch C and the switch D are not changed, that is, the switch B, the switch C and the switch D are in an off state, the input end inputs a detection signal, the output end 4 outputs the detection signal, the microprocessor receives the detection signal output by the output end 4, accordingly, the microprocessor can determine that the switch a on the transmission line corresponding to the output end 4 is in the on state, and further can determine that the key corresponding to the switch a is activated, that is, touched or pressed.
Claims (4)
1. A keyboard circuit, comprising: input, N output, N transmission line and switch, wherein:
the N transmission lines are mutually independent, and each transmission line is provided with a switch;
the output end is connected with the N output ends through the N transmission lines.
2. The keyboard circuit of claim 1, comprising: the microprocessor is used for inputting detection signals to the input end and receiving the detection signals output by the output end; the closed state of the switch on the corresponding transmission line is determined by the output terminal outputting the detection signal.
3. A keyboard, comprising: the keyboard circuit of claim 2.
4. The keyboard of claim 3, comprising the key positions: the switch is used for driving the corresponding switch to be closed when being subjected to external force; the microprocessor is used for determining whether the key position is activated or not according to the closing state of the switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920767996.7U CN210324106U (en) | 2019-05-27 | 2019-05-27 | Keyboard circuit and keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920767996.7U CN210324106U (en) | 2019-05-27 | 2019-05-27 | Keyboard circuit and keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210324106U true CN210324106U (en) | 2020-04-14 |
Family
ID=70140137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920767996.7U Active CN210324106U (en) | 2019-05-27 | 2019-05-27 | Keyboard circuit and keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210324106U (en) |
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2019
- 2019-05-27 CN CN201920767996.7U patent/CN210324106U/en active Active
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