CN204010624U - A kind of temperature controller push button detects and display driver circuit - Google Patents
A kind of temperature controller push button detects and display driver circuit Download PDFInfo
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- CN204010624U CN204010624U CN201420459829.3U CN201420459829U CN204010624U CN 204010624 U CN204010624 U CN 204010624U CN 201420459829 U CN201420459829 U CN 201420459829U CN 204010624 U CN204010624 U CN 204010624U
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- display
- temperature controller
- detects
- driver circuit
- display driver
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Abstract
The utility model relates to a kind of temperature controller push button and detects and display driver circuit, detects and display driver for the button of temperature controller.Comprise control module, display module and key-press module, described control module comprises central processing unit, and described display module comprises transistor and a display, and described key-press module comprises keyswitch, diode and resistance.The utility model display module and key-press module mouth line resource multiplex, effectively saved a mouthful line resource, and the mode of connection is simple, and the power consumption of control module is little, and encapsulation volume is little.In the time carrying out button detection, needn't within each scan period, change the port voltage of original button common port into input state by output state, reduce the difficulty of Software for Design, display does not exist without the state showing, has increased the stability showing.
Description
Technical field
The utility model relates to a kind of temperature controller push button and detects and display driver circuit, detects and display driver for the button of temperature controller.
Background technology
In prior art, the input port line of display module and key-press module does not share, and display driver and button drive needs independently mouthful line, causes a mouthful waste for line resource, wiring complexity, and governor circuit power consumption is large and encapsulation volume is larger; In the time carrying out button detection, within each scan period, need to change the port voltage of original button common port into input state by output state, not only increased the complexity of Software for Design, and now display can not show.
Utility model content
In order to overcome the shortcoming of prior art, the utility model provides a kind of temperature controller push button to detect and display driver circuit.
Technical solutions of the utility model are as follows:
A kind of temperature controller push button detects and display driver circuit, comprise control module, display module and key-press module, described control module comprises central processing unit, described display module comprises transistor and a display, described key-press module comprises keyswitch, diode and resistance, the base stage of described transistor is connected with the delivery outlet line of central processing unit, the collector of described transistor is connected with power supply, the emitter of described transistor is connected with the input port line of display, the emitter of described transistor is connected with one end of keyswitch, the other end of described keyswitch is connected with the positive pole of diode, the negative pole of described diode is connected with the input port line of central processing unit by resistance one, the negative pole of described diode is by resistance two ground connection.
The number of described transistor equates with the number of keyswitch, and the number of described transistor equates with the number of diode.
The number of described transistor is multiple.
The number of described transistor is four.
As preferably, described resistance one resistance is 10K Ω.
As preferably, described resistance two resistances are 4.7K Ω.
The utility model beneficial effect is: the emitter of (1) described transistor is connected with the input port line of display, the emitter of described transistor is connected with one end of keyswitch, be display module and key-press module mouth line resource multiplex, effectively save a mouthful line resource, the mode of connection is simple, the power consumption of control module is little, and encapsulation volume is little; (2) in the time carrying out button detection, needn't within each scan period, change the port voltage of original button common port into input state by output state, reduce the difficulty of Software for Design, display does not exist without the state showing, has increased the stability showing.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is that existing temperature controller push button detects and display driver circuit schematic diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Consult Fig. 2.
A kind of temperature controller push button detects and display driver circuit, comprise control module, display module and key-press module, described control module comprises central processing unit, described display module comprises transistor Q1, transistor Q2, transistor Q3, transistor Q4 and a display, described key-press module comprises keyswitch SW1, keyswitch SW2, keyswitch SW3 and keyswitch SW4, diode and resistance, described transistor Q1, Q2, the base stage of Q3 and Q4 is connected with the delivery outlet line of central processing unit respectively, described transistor Q1, Q2, the collector of Q3 and Q4 is connected with power supply, described transistor Q1, Q2, the emitter of Q3 and Q4 is connected with the input port line of display respectively, the emitter of described transistor Q1 is connected with one end of keyswitch SW1, the emitter of described transistor Q2 is connected with one end of keyswitch SW2, the emitter of described transistor Q3 is connected with one end of keyswitch SW3, the emitter of described transistor Q4 is connected with one end of keyswitch SW4, the other end of described keyswitch is connected with the positive pole of corresponding diode, the negative pole of described diode is connected with the input port line of central processing unit by resistance one R1, the negative pole of described diode is by resistance two R2 ground connection.
As preferably, described resistance one resistance is 10K Ω.
As preferably, described resistance two resistances are 4.7K Ω.
Principle of work of the present utility model is.
When work, central processing unit control transistor, Q1, Q2, Q3, Q4 enter duty successively, and corresponding, display can show respectively corresponding content, after Q4 has worked, enters next cycle, and Q1 starts working, reciprocation cycle.When the switch that pushes button arbitrarily, such as SW2, simultaneously, within this cycle, only have and can arrive Q2 conducting work, now electric current by resistance R 1 to high-order pulse signal of central processing unit, thereby can judge that now press is keyswitch SW2.
As preferably, described resistance one resistance is 10K Ω, as preferably, described resistance two resistances are 4.7K Ω, and it is 0.5mA rank that the choose reasonable of resistance makes the maximum current in key circuit, the energy consumption greatly reducing, reduce voltage fluctuation, and then can not impact multiplexing display in the time of button, display, without show state, shows more stable.
Consult Fig. 1.
In prior art, central processing unit control transistor, Q5, Q6, Q7, Q8 enters duty successively, now button common port R3 is output high resistant, avoid button on the impact showing, display shows Q5 successively, Q6, Q7, the content of Q8, the next moment, button common port R3 is set to input, scan Q5 simultaneously, Q6, Q7, tetra-address wires of Q8, in the time scanning above-mentioned certain root address wire, button common port detects input signal, can judge it is SW5, SW6, in SW7 and SW8, be which button is connected, now, display is displaying contents not.
Above-mentioned drawings and Examples are only for the utility model is described, any under technical field those of ordinary skill suitable variation or modification that it is done, or use other flower types instead and make this technical change, all should be considered as not departing from the utility model patent category.
Claims (6)
1. a temperature controller push button detects and display driver circuit, comprise control module, display module and key-press module, it is characterized in that: described control module comprises central processing unit, described display module comprises transistor and a display, described key-press module comprises keyswitch, diode and resistance, the base stage of described transistor is connected with the delivery outlet line of central processing unit, the collector of described transistor is connected with power supply, the emitter of described transistor is connected with the input port line of display, the emitter of described transistor is connected with one end of keyswitch, the other end of described keyswitch is connected with the positive pole of diode, the negative pole of described diode is connected with the input port line of central processing unit by resistance one, the negative pole of described diode is by resistance two ground connection.
2. a kind of temperature controller push button according to claim 1 detects and display driver circuit, it is characterized in that: the number of described transistor equates with the number of keyswitch, and the number of described transistor equates with the number of diode.
3. a kind of temperature controller push button according to claim 2 detects and display driver circuit, it is characterized in that: the number of described transistor is multiple.
4. a kind of temperature controller push button according to claim 3 detects and display driver circuit, it is characterized in that: the number of described transistor is four.
5. a kind of temperature controller push button according to claim 4 detects and display driver circuit, it is characterized in that: described resistance one resistance is 10K Ω.
6. a kind of temperature controller push button according to claim 5 detects and display driver circuit, it is characterized in that: described resistance two resistances are 4.7K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459829.3U CN204010624U (en) | 2014-08-15 | 2014-08-15 | A kind of temperature controller push button detects and display driver circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459829.3U CN204010624U (en) | 2014-08-15 | 2014-08-15 | A kind of temperature controller push button detects and display driver circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204010624U true CN204010624U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420459829.3U Expired - Fee Related CN204010624U (en) | 2014-08-15 | 2014-08-15 | A kind of temperature controller push button detects and display driver circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683604A (en) * | 2017-03-22 | 2017-05-17 | 佛山市顺德区携创电机制造有限公司 | LED display and key detection multiplexing circuit |
| CN110390904A (en) * | 2018-04-13 | 2019-10-29 | 比亚迪股份有限公司 | The driving device and method of electronic equipment and LED array |
-
2014
- 2014-08-15 CN CN201420459829.3U patent/CN204010624U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683604A (en) * | 2017-03-22 | 2017-05-17 | 佛山市顺德区携创电机制造有限公司 | LED display and key detection multiplexing circuit |
| CN106683604B (en) * | 2017-03-22 | 2020-07-21 | 广东携创电机有限公司 | Multiplexing processing circuit for L ED display and key detection |
| CN110390904A (en) * | 2018-04-13 | 2019-10-29 | 比亚迪股份有限公司 | The driving device and method of electronic equipment and LED array |
| CN110390904B (en) * | 2018-04-13 | 2021-05-14 | 比亚迪半导体股份有限公司 | Electronic device and driving device and method of LED array |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20200815 |
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| CF01 | Termination of patent right due to non-payment of annual fee |