CN117526918A - Switch control device and advertisement exhibition system - Google Patents
Switch control device and advertisement exhibition system Download PDFInfo
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- CN117526918A CN117526918A CN202410012271.2A CN202410012271A CN117526918A CN 117526918 A CN117526918 A CN 117526918A CN 202410012271 A CN202410012271 A CN 202410012271A CN 117526918 A CN117526918 A CN 117526918A
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- 238000010586 diagram Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Input From Keyboards Or The Like (AREA)
Abstract
The application provides a switch control device and advertisement exhibition system, the switch control device includes a plurality of buttons, a plurality of button interfaces, a plurality of first switch circuit and a resistance circuit. The plurality of key interfaces are connected with the plurality of keys in a one-to-one correspondence manner; the control end of each first switch circuit is connected with the corresponding key interface, and the first switch circuit is conducted when the corresponding key is conducted; the resistor circuit comprises a plurality of resistors which are sequentially connected in series, the head end of the resistor circuit is connected with a first preset voltage output by a first control circuit in the advertising machine, and the second end of each resistor is grounded through a first switch circuit corresponding to the second end of each resistor. Based on the above, the loop voltage values of the resistor circuits are different when the first switch circuits are turned on, and the loop voltage values are used for indicating the first control circuits to execute the play control functions corresponding to the keys corresponding to the first control circuits. Therefore, the control of the keys is realized in an electronic switch mode, the influence of the cable resistance is avoided, and the key crosstalk problem caused by a resistor voltage division mode is solved.
Description
Technical Field
The application belongs to the technical field of advertisement playing, and particularly relates to a switch control device and an advertisement exhibition system.
Background
The advertisement machine is a new generation intelligent device, a complete advertisement broadcasting control system is formed by terminal software control, network information transmission and multimedia terminal display, and advertisement propaganda is carried out by multimedia materials such as pictures, characters, videos, small plug-ins (weather, exchange rate and the like).
Illustratively, the advertiser may be applied in a scene such as a mall. In particular, the advertiser may be located in a customer gathering area, and the means for controlling the playback of the advertiser may be located in a central office or the like. For example, assume that the device is provided with a first key, a second key, a third key and a fourth key, and the playing control corresponding to the four keys is sequentially that the volume is increased, the volume is decreased, the first advertisement video is played and the second advertisement video is played. It can be understood that the user can control the advertisement machine to play the first advertisement video through the third key or to play the second advertisement video through the fourth key, and at the same time, can also control the advertisement machine to increase the volume through the first key or control the advertisement machine to decrease the volume through the second key.
In the related art, the keys and the advertising machine are connected through cables, and the control function of the keys is realized through a resistor voltage division mode. The inventors found that: since the distance between the key and the advertisement machine is usually long, the length of the cable between the key and the advertisement machine is long. In this way, the problem of key crosstalk may be caused in the manner of realizing the control function by the resistor voltage division. For example, in the above example, if the environmental humidity is high, the resistance of the cable itself will increase, which directly affects the control manner of the resistor voltage division, resulting in key crosstalk. For example, in the foregoing example, assuming that the current environment is wet and the user has a requirement of increasing the volume at this time, the control can be performed through the third button, but because the resistance value of the cable is increased, the actual voltage value after pressing the third button will change greatly, for example, the actual voltage value falls into the voltage gear corresponding to the fourth button, so that the advertisement player mistakenly considers that the fourth button is pressed, and the volume is reduced, which greatly reduces the user experience.
Disclosure of Invention
Therefore, the application provides a switch control device and an advertisement exhibition system, wherein the control of keys is realized in an electronic switch mode, the keys cannot be influenced by the resistance value of a cable, and the key crosstalk problem caused by a resistor voltage division mode in the related technology is solved.
In a first aspect, the present application provides a switch control device for use in an advertising display system including an advertising machine, the switch control device comprising:
a plurality of keys;
the plurality of key interfaces are connected with the plurality of keys in a one-to-one correspondence manner; the key interfaces and the keys connected with the key interfaces are connected in a cable mode;
the control ends of the first switch circuits are connected with the corresponding key interfaces; the first switch circuit is conducted when the corresponding key is conducted;
the resistor circuit comprises a plurality of resistors which are sequentially connected in series, and the head end formed by sequentially connecting the resistors in series is connected with a first preset voltage output by a first control circuit in the advertising machine; the resistors are in one-to-one correspondence with the first switch circuits, and the second ends of the resistors are grounded through the first switch circuits corresponding to the resistors;
when the first switch circuits are conducted, the loop voltage values of the resistor circuits are different, and the loop voltage values are used for indicating the first control circuits to execute play control functions corresponding to the keys corresponding to the first control circuits.
In the switch control device provided by the application, a first key of the plurality of keys is provided with an LED lamp;
the switch control device also comprises a second control circuit and a second switch circuit;
the second control circuit is connected with a key interface corresponding to the first key;
the control end of the second switch circuit is connected with the second control circuit, and the second switch circuit is connected in series in the power supply loop of the LED lamp;
wherein the second control circuit is configured to: and controlling the second switch circuit to be alternately switched on and off in response to the conduction of the first key so as to enable the LED lamp to flash.
In the switch control device provided by the application, a voltage clamping circuit is connected between the second control circuit and a key interface corresponding to the first key.
In the switch control device provided by the application, the first key is used for controlling the content of the played advertisement video; and/or, keys except the first key in the plurality of keys are used for controlling the playing state.
In the switch control device provided by the application, the second control circuit is connected with the first control circuit; the second control circuit is further configured to: responding to a play end instruction sent by the second control circuit, and ending and controlling the second switch circuit to be alternately switched on and switched off;
and/or the number of the groups of groups,
the second control circuit is further configured to: and controlling the second switch circuit to be in a conducting state in a normal state.
In the switch control device provided by the application, one end of the key is connected with a second preset voltage, and the other end of the key is connected with the key interface; the key is a non-self-locking key.
In a second aspect, the present application provides an advertising display system comprising an advertising player and a switch control device according to any one of the first aspects.
According to the technical scheme, the control function of the key is realized through the first switch circuit and the resistor circuit. That is, the control of the keys is realized by adopting the electronic switch mode, the influence of the cable resistance is avoided, the key crosstalk problem caused by the resistor voltage division mode in the related technology is solved, and the user experience is optimized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of an advertisement exhibition system according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a switch control device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an exemplary circuit configuration of a switching circuit according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an exemplary circuit configuration of a key according to an embodiment of the present application;
fig. 5 is a schematic diagram of an exemplary circuit configuration of a switch control device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the terms "first," "second," "third," "fourth," and the like in the description, in the claims, or in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order, and are not to be interpreted as indicating or implying a relative importance or an implicit indication of the number of features indicated.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
An advertisement exhibition system provided in the embodiments of the present application, as shown in fig. 1, may include a switch control device 100 and an advertisement player 200. Illustratively, the user may play control of the advertisement player 200 through the switch control device 100, for example, switching advertisement videos currently played, decreasing current play volume, increasing current display brightness, and the like.
In some embodiments, as shown in fig. 2, the switch control device 100 may include a plurality of keys 110, a plurality of key interfaces 120, a plurality of first switch circuits 130, and a resistor circuit 140.
Wherein, the plurality of keys 110 are connected with the plurality of key interfaces 120 in a one-to-one correspondence manner, and each key 110 is connected with the key interface 120 connected with the key 110 in a cable manner; meanwhile, the plurality of key interfaces 120 are also in one-to-one correspondence with the plurality of first switch circuits 130. That is, in the embodiment of the present application, the number of the keys 110, the key interface 120, and the first switch circuit 130 are consistent and correspond to each other. The control terminal of each first switch circuit 130 is connected to the corresponding key interface 120, that is, each key 110 controls the on/off of the corresponding first switch circuit 130, specifically, the first switch circuit 130 may be turned on when the corresponding key 110 is turned on. For example, the number of the keys 110, the key interfaces 120, and the first switch circuit 130 may be six, and then the first key 110 is connected to the first key interface 120 through a cable, and the first key interface 120 is connected to the control terminal of the first switch circuit 130, and so on, the sixth key 110 is connected to the sixth key interface 120 through a cable, and the sixth key interface 120 is connected to the control terminal of the sixth first switch circuit 130. Therefore, if the first key 110 is turned on, the first switch circuit 130 is turned on; if the sixth key 110 is turned on, the sixth first switch circuit 130 is turned on.
Wherein the resistor circuit 140 includes a plurality of resistors R serially connected in sequence 1 To R N Similarly, the plurality of resistors are also identical in number and in one-to-one correspondence with the plurality of first switch circuits 130. A head end (i.e. R) formed by serially connecting a plurality of resistors in turn 1 Is connected with a first preset voltage output by a first control circuit 210 in the advertisement player 200, e.g., R 1 The first end of the first voltage transformer is connected with a first preset voltage output by a power pin in the first control circuit 210; at the same time, the second ends of the respective resistors pass throughThe corresponding first switch circuit 130 is grounded. For example, in the above example, it may include six resistors R in series 1 To R 6 Then, resistance R 1 A first end of the resistor is connected with a first preset voltage, six resistors R 1 To R 6 Is grounded through the corresponding first switch circuit 130.
Based on this, the loop voltage values of the resistor circuits 140 are different when the first switch circuits 130 are turned on, where the loop voltage values are used to instruct the first control circuits 210 to execute the play control function corresponding to the corresponding keys 110. For example, in the above example, when the first key 110 is turned on, the first switch circuit 130 is turned on, and the first preset voltage and the resistor R 1 The first switch circuit 130 forms a loop, and the loop voltage at this time is denoted as V1; when the second key 110 is turned on, the second first switch circuit 130 is turned on to obtain a first preset voltage and a resistor R 1 Resistance R 2 The second first switch circuit 130 forms a loop with the first switch circuit, and the loop voltage at this time is denoted as V2; similarly, when the sixth key 110 is turned on, the sixth first switch circuit 130 is turned on to provide a first predetermined voltage and a resistor R 1 Resistance R 2 Resistance R 3 Resistance R 4 Resistance R 5 Resistance R 6 The sixth first switching circuit 130 forms a loop, and the loop voltage at this time is denoted as V6. It can be understood that the resistance of the loop is different when each of the first switch circuits 130 is turned on, and thus the loop voltage of the resistor circuit 140 is different when each of the first switch circuits 130 is turned on. Thus, different values of the loop voltage may be used to indicate which key 110 is pressed, so that the first control circuit 210 may be used to instruct the first control circuit 210 to perform a play control function corresponding to the key 110, for example, the first control circuit 210 may detect the loop voltage of the resistor circuit 140 in real time, and if the loop voltage value is detected to be V1, it may be determined that the first key 110 is pressed, and the current play volume may be reduced; if the loop voltage value is detected to be V6, it can be determined that the sixth key 110 is pressed, and the currently played advertisement video can be switched to the sixth pressAdvertisement video corresponding to key 110.
As can be seen, in the embodiment of the present application, the control function of the key 110 is implemented by the first switch circuit 130 and the resistor circuit 140. That is, the embodiment of the application adopts the electronic switch mode to realize the control of the keys, is not influenced by the cable resistance, solves the key crosstalk problem caused by the resistor voltage division mode in the related art, and optimizes the user experience.
Illustratively, the schematic circuit of the switching circuit (i.e., the first switching circuit 130 described above and the second switching circuit 160 described below) in the embodiment of the present application may be shown in fig. 3. Specifically, the base (i.e., control terminal) of the triode is connected to a control source, such as the key interface 120 (i.e., the key 110), on the one hand, through a resistor, and to ground, on the other hand, through a resistor; two switching terminals (i.e. emitter and collector) of the transistor, one connected to the controlled object, e.g. to a first resistor R 1 The other of which is grounded.
For example, as shown in fig. 4, one end of the key 110 is connected to a second preset voltage, for example, 12V, and the other end is connected to the key interface 120, where the key 110 may be a non-self-locking key. It can be understood that when the key 110 is in the pressed state, during the pressed state of the key 110, the second preset voltage is output through the key interface 120 connected to the key 110, for example, to the control terminal of the first switch circuit 130 connected to the key interface 120, so that the first switch circuit 130 is turned on, that is, the first switch circuit 130 is turned on when the key 110 is turned on; and for example, to the second control circuit 150 described below, so that the second control circuit 150 knows the conduction of the key.
In some embodiments, a first key of the plurality of keys 110 has an LED light, for example, in the above example, the third key 110 to the sixth key 110 may have LED lights, so the third key 110 to the sixth key 110 are the first key. Illustratively, the first key is used to control the content of the advertisement video being played, for example, if the third key 110 is pressed, the advertisement player 200 will play the first advertisement video, if the fourth key 110 is pressed, the advertisement player 200 will play the second advertisement video, and so on, if the sixth key 110 is pressed, the advertisement player 200 will play the fourth advertisement video. Of course, in some embodiments, keys other than the first key of the plurality of keys 110 may not have LED lights, and such keys may be used to control the play status, e.g., the first key 110 and the second key 110 may not have LED lights in the above examples. Illustratively, if the first key 110 is pressed, the current playing volume may be reduced; if the second key 110 is pressed, the current play volume may be increased.
Based on this, as shown in fig. 2, the switch control device 100 may further include a second control circuit 150 and a second switch circuit 160. The second control circuit 150 is connected to the key interfaces 120 corresponding to the first keys (only one key interface 120 is illustratively connected in the figure), for example, in the foregoing example, the second control circuit 150 may include four pins, where the four pins are connected in a one-to-one correspondence with the four key interfaces 120 corresponding to the four first keys. Thus, when the first key is turned on, the second control circuit 150 can know the conduction of the first key. The control end of the second switch circuit 160 is connected to the second control circuit 150, that is, the on-off state of the second switch circuit 160 is determined by the second control circuit 150; the second switch circuit 160 is connected in series in the power supply loop of the LED lamp of the first key, that is, if the second switch circuit 160 is turned on, the LED lamp is powered on to emit light; if the second switching circuit 160 is turned off, the LED lamp is turned off.
In the embodiment of the present application, the second control circuit 150 is used for: in response to the turning on of the first key, the second switching circuit 160 is controlled to be alternately turned on and off to blink the LED lamp, and the second switching circuit 160 may output an alternating high and low level to alternately turn on and off the second switching circuit 160, for example. For example, in the previous example, if the third key 110 is pressed, on one hand, the advertisement machine 200 will play the first advertisement video, and on the other hand, the second control circuit 150 will control the LED lamp on the third key 110 to flash; similarly, if the sixth button 110 is pressed, the advertisement machine 200 will play the fourth advertisement video on the one hand, and the second control circuit 150 will control the LED lamp on the sixth button 110 to flash on the other hand. In some embodiments, as shown in fig. 2, the second control circuit 150 is connected to the first control circuit 210, and the second control circuit 150 is further configured to: in response to the play end instruction sent by the second control circuit 150, the end control second switch circuit 160 alternately turns on and off. For example, in the foregoing example, if the advertisement player 200 ends playing the first advertisement video, the second control circuit 150 may send a play end instruction to the first control circuit 210, so that the first control circuit 210 ends controlling the LED lamp on the third key 110 to flash. In some embodiments, the second control circuit 150 is further configured to: the second switch circuit 160 is controlled to be in a conducting state in a normal state, that is, if the advertisement player 200 does not play the advertisement video corresponding to the first key, the LED on the first key is controlled to be normally on. It should be noted that, in the embodiment of the present application, a part of the control is implemented on the second control circuit 150, and compared with the whole control is implemented on the first control circuit 210, the operation burden of the first control circuit 210 can be effectively reduced; in addition, the LED lamp flashes after the first key is pressed, so that a user can feel science and technology, and user experience is optimized.
In some embodiments, a voltage clamping circuit is connected between the second control circuit 150 and the key interface 120 corresponding to the first key. Specifically, when the voltage output from the key interface 120 corresponding to the first key is too high, in order to protect the second control circuit 150, the voltage clamping circuit may be used to limit the voltage input to the second control circuit 150.
In summary, the switch control device 100 may be exemplarily shown in fig. 5. In this example, the number of keys 110 is six, S1 to S6 respectively, and the keys 110 are non-self-locking keys, wherein S3 to S6 are first keys with LED lamps, LED1 to LED4 respectively; s1 and S2 are not provided with LED lamps, which respectively control the addition and the subtraction of the volume, and the specific implementation of this example is referred to the previous discussion, and will not be repeated here. Based on this, in the normal state, the second control circuit 150 may control the four second switch circuits 160 to be turned on, so that the four LED lamps are in a normally-on state. Then when the userWhen S3 is pressed down, on the one hand, the second preset voltage 12V is input to the first switch circuit 130 corresponding to S3, so that the first switch circuit 130 is turned on, and the first preset voltage and the resistor R output by the first control circuit 210 are accordingly 1 Resistance R 2 Resistance R 3 The first switch circuit 130 and the ground are turned on, so that the loop voltage of the resistor circuit 140 is V3, and therefore, the first control circuit 210 can determine that S3 is pressed according to V3, and control the advertisement player 200 to play the advertisement video corresponding to S3; on the other hand, the first preset voltage 12V is input to the second control circuit 150, so that the second control circuit 150 knows that S3 is pressed, and the second control circuit 150 controls the second switch circuit 160 connected in series to the power supply circuit of the LED1 to be alternately turned on and off, so that the LED1 is changed from a normally-on state to a blinking state. After that, when the playing of the advertisement video corresponding to S3 is completed, the second control circuit 150 sends a playing completion instruction to the first control circuit, so that the first control circuit 210 controls the second switch circuit 160 corresponding to S3 to be turned on, and the LED1 is changed from flashing to normal lighting. It can be understood that when S4, S5 or S6 is pressed, the working principle is the same as that of the pressing S3, so that the description is omitted. In addition, when the advertisement player 200 plays or does not play the advertisement video, if the user presses S1, the second preset voltage 12V is input to the first switch circuit 130 corresponding to S1, so that the first switch circuit 130 is turned on, and the second preset voltage and the resistor R output by the first control circuit 210 are accordingly made 1 The first switch circuit 130 and the ground are turned on, so that the loop voltage of the resistor circuit 140 is V1, and therefore, the first control circuit 210 can determine that S1 is pressed according to V1 to increase the playing volume. It will be appreciated that the operating principle of pressing S2 is the same as that of pressing S1, and thus will not be described again. It can be seen that the control function of the key 110 is realized by the first switch circuit 130 and the resistor circuit 140. That is, the embodiment of the application adopts the electronic switch mode to realize the control of the keys, is not influenced by the cable resistance, solves the key crosstalk problem caused by the resistor voltage division mode in the related art, and optimizes the user experience.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A switch control device, characterized by being applied to an advertisement exhibition system including an advertisement machine, comprising:
a plurality of keys;
the plurality of key interfaces are connected with the plurality of keys in a one-to-one correspondence manner; the key interfaces and the keys connected with the key interfaces are connected in a cable mode;
the control ends of the first switch circuits are connected with the corresponding key interfaces; the first switch circuit is conducted when the corresponding key is conducted;
the resistor circuit comprises a plurality of resistors which are sequentially connected in series, and the head end formed by sequentially connecting the resistors in series is connected with a first preset voltage output by a first control circuit in the advertising machine; the resistors are in one-to-one correspondence with the first switch circuits, and the second ends of the resistors are grounded through the first switch circuits corresponding to the resistors;
when the first switch circuits are conducted, the loop voltage values of the resistor circuits are different, and the loop voltage values are used for indicating the first control circuits to execute play control functions corresponding to the keys corresponding to the first control circuits.
2. The switch control device of claim 1, wherein a first key of the plurality of keys has an LED light;
the switch control device also comprises a second control circuit and a second switch circuit;
the second control circuit is connected with a key interface corresponding to the first key;
the control end of the second switch circuit is connected with the second control circuit, and the second switch circuit is connected in series in the power supply loop of the LED lamp;
wherein the second control circuit is configured to: and controlling the second switch circuit to be alternately switched on and off in response to the conduction of the first key so as to enable the LED lamp to flash.
3. The switch control device according to claim 2, wherein a voltage clamping circuit is connected between the second control circuit and a key interface corresponding to the first key.
4. The switch control device of claim 2, wherein the first key is used to control the content of the advertising video being played; and/or, keys except the first key in the plurality of keys are used for controlling the playing state.
5. The switch control device according to claim 2, wherein the second control circuit is connected to the first control circuit; the second control circuit is further configured to: responding to a play end instruction sent by the second control circuit, and ending and controlling the second switch circuit to be alternately switched on and switched off;
and/or the number of the groups of groups,
the second control circuit is further configured to: and controlling the second switch circuit to be in a conducting state in a normal state.
6. The switch control device according to any one of claims 1 to 5, wherein one end of the key is connected to a second preset voltage, and the other end is connected to the key interface; the key is a non-self-locking key.
7. An advertising display system comprising an advertising machine and a switch control device as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410012271.2A CN117526918A (en) | 2024-01-04 | 2024-01-04 | Switch control device and advertisement exhibition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410012271.2A CN117526918A (en) | 2024-01-04 | 2024-01-04 | Switch control device and advertisement exhibition system |
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| Publication Number | Publication Date |
|---|---|
| CN117526918A true CN117526918A (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410012271.2A Pending CN117526918A (en) | 2024-01-04 | 2024-01-04 | Switch control device and advertisement exhibition system |
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| CN (1) | CN117526918A (en) |
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| CN217116054U (en) * | 2021-12-07 | 2022-08-02 | 青岛易来智能科技股份有限公司 | Multifunctional key circuit |
| CN219938333U (en) * | 2023-03-29 | 2023-10-31 | 好孩子儿童用品有限公司 | AD key circuit and automobile safety seat with same |
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2024
- 2024-01-04 CN CN202410012271.2A patent/CN117526918A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6538582B1 (en) * | 1999-11-19 | 2003-03-25 | Benq Corporation | Key-pressing circuit |
| CN2805258Y (en) * | 2005-05-13 | 2006-08-09 | 海信集团有限公司 | Touch key electric circuit for TV set |
| CN101359034A (en) * | 2007-07-31 | 2009-02-04 | 华矽半导体股份有限公司 | Keyboard detection circuit and method thereof |
| CN111756383A (en) * | 2019-03-29 | 2020-10-09 | 群光电子股份有限公司 | Keyboard scanning circuit and control method thereof |
| CN113433406A (en) * | 2021-06-18 | 2021-09-24 | 上海润欣科技股份有限公司 | Key detection circuit and terminal equipment |
| CN217116054U (en) * | 2021-12-07 | 2022-08-02 | 青岛易来智能科技股份有限公司 | Multifunctional key circuit |
| CN216751719U (en) * | 2021-12-13 | 2022-06-14 | 深圳市正浩创新科技股份有限公司 | Multi-key awakening identification circuit and electronic equipment |
| CN219938333U (en) * | 2023-03-29 | 2023-10-31 | 好孩子儿童用品有限公司 | AD key circuit and automobile safety seat with same |
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