CN101175345A - Indicating circuit twinkling at start-up - Google Patents
Indicating circuit twinkling at start-up Download PDFInfo
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- CN101175345A CN101175345A CNA2006100700184A CN200610070018A CN101175345A CN 101175345 A CN101175345 A CN 101175345A CN A2006100700184 A CNA2006100700184 A CN A2006100700184A CN 200610070018 A CN200610070018 A CN 200610070018A CN 101175345 A CN101175345 A CN 101175345A
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Abstract
The present invention discloses a starting-up flushing instruction circuit, which comprises an indicator light power supply loop. A switch component is connected in the indicator light power supply loop. The gating switch of the switch component is serial-connected with the indicator light power supply loop. A control end is connected with the output end of a hysteretic comparer circuit. In the hysteretic comparer circuit, on the one hand, the first input end of the comparer is connected with a direct current power supply through a partial pressure resistance; on the other hand, the first input end of the comparer is connected with the output end of the comparer through a feedback resistance. On the one hand, the second input end of the comparer is connected with an energy storage capacity; on the other hand, the second input end of the comparer is connected with the output end of the comparer through another feedback resistance. The output end of the comparer is connected with the control end of the switch component and controls the switching state of the switch component. In the present invention, an indicator light flashing automatic control circuit is formed by designing the hysteretic comparer on an electric appliance circuit board; so the alternating flashing during the starting-up period of the electric appliance is realized and the prescheduled object of starting-up instruction is reached.
Description
Technical field
The invention belongs to the indicating circuit technical field, specifically, relate to a kind of indicator light control circuit that when electric equipment is started shooting, glimmers and show start process by the control indicator light.
Background technology
Along with the continuous development of TV tech, the function that television set can be finished is more and more, and its internal circuit plate is complicated unusually, causes the television boot-strap time obviously to prolong.Particularly after digital program standards was released, integrated analog/digital equipment became an important directions of TV development, and present digital analog integrated machine core generally adopts the built-in Linux framework, because system is huge, the available machine time is longer, may be more than tens seconds.The consumer in use waits for such one very long period, can produce the anxiety sense unavoidably, even can cause that the consumer misreads, think that television set goes wrong, thereby has reduced the consumer to the confidence of tv product with to the good opinion of brand names.If can come the television boot-strap process is indicated by the mode of indicator light flicker, not only can eliminate consumer's misunderstanding, and can alleviate the anxiety sense that the consumer produces because of very long wait.
At present, having a variety ofly for the implementation of control indicator light flicker, generally all is to come that by active devices such as MCU indicator light is carried out break-make to control.Though this implementation method is simple, but, owing to need to use the MCU chip, cause the circuit cost height, stand-by power consumption is big, and need the cooperation of software, increased the complexity of system, simultaneously owing to introduce new ACTIVE CONTROL device, also need to solve this ACTIVE CONTROL device stability and with the matching problem of system, and when electric equipment was just started shooting, the master control chip did not start as yet, and system is in not controlled stages, can not control external circuit, therefore, can not control effectively, reach the purpose that the user is started shooting and points out indicator light.
Summary of the invention
The indicator light flashing circuit need use MCU to control the circuit cost height that is caused, the problem of system complex in the prior art in order to solve in the present invention, a kind of novel indicating circuit twinkling at start-up is provided, set up the indicator light switch control circuit by adopting discrete component, utilize the flicker of indicator light to point out consumer electronic appliance equipment to be in starting up's stage, slow down the anxiety that causes to the consumer because start-up time is long and the purpose of dislike thereby reached.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of indicating circuit twinkling at start-up, comprise the indicator light current supply circuit, be connected with a switch element in described indicator light current supply circuit, the gating switch of described switch element is connected in the indicator light current supply circuit, and control end connects the output of a hysteresis loop comparator circuit; In described hysteresis loop comparator circuit, the first input end of comparator connects DC power supply through divider resistance on the one hand, connects the output of described comparator on the other hand through feedback resistance; Second input of described comparator connects storage capacitor on the one hand, connects the output of described comparator on the other hand through another feedback resistance; The output of described comparator connects the control end of described switch element, and the on off state of switch element is controlled.
In order to realize that indicator light circuit glimmers in start process, and after the normal operation of electric equipment, stop to glimmer, the feeder ear of described comparator connects described DC power supply by the gating switch of a switch element, the electric equipment master control borad sends control signal after the normal operation of system, control described switch element and disconnect, comparator quits work.In order to simplify circuit structure, reduce cost, the switch element of described connection comparator feeder ear adopts a NPN type triode to realize.The base stage of described NPN type triode connects the control signal output ends of described electric equipment master control borad on the one hand, connects described DC power supply on the other hand; The collector electrode of described triode connects described DC power supply, and emitter connects the feeder ear of described comparator.
For the alternately flicker of indicator light that realizes two kinds of colors, to increase the visual sense of beauty of electric equipment, described indicator light comprises two, forms two indicator light current supply circuits with described DC power supply respectively, all is connected with a switch element in each indicator light current supply circuit; The output of described comparator connects wherein the control end of switch element in the indicator light current supply circuit on the one hand, connects the control end of switch element in the other indicator light current supply circuit on the other hand by negater circuit.
In order to simplify circuit structure, reduce cost, the described switch element that is connected in the indicator light current supply circuit all adopts a NPN type triode to realize; Wherein, the base stage of a NPN type triode directly connects the output of comparator, and a resistance is connected described DC power supply; The base stage of the 2nd NPN type triode is passed through the output that described negater circuit connects comparator, and connects described DC power supply by another resistance; The collector and emitter of two NPN type triodes is connected on respectively in the different indicator light current supply circuits.
In the present invention, negater circuit also adopts a NPN type triode to realize.The base stage of described NPN type triode connects the output of comparator, grounded emitter, and collector electrode connects described DC power supply by resistance on the one hand, connects the base stage of described the 2nd NPN type triode on the other hand.
In order to prevent that late-class circuit from impacting comparator, the output of described comparator connects the anode of a switching diode, the negative electrode of described switching diode connects the base stage of a described NPN type triode on the one hand, connects the base stage of NPN type triode in the described negater circuit on the other hand.
In the present invention, the first input end of described comparator is the in-phase input end of comparator, and second input is the inverting input of comparator.
For realize electric equipment start finish after, master control borad can carry out switch control to described indicator light circuit, the base stage of described first, second NPN type triode respectively with electric equipment in the corresponding connection of two GPIO mouths of main control chip.Main control chip is taken over indicator light, sends suitable switch controlling signal, and indication mechanism enters normal operating conditions.
Compared with prior art, advantage of the present invention and good effect are: the indicator light flicker automatic control circuit that the present invention is made up of hysteresis loop comparator by design on the electric equipment circuit board, with simple circuit configuration, the alternately flicker of indicator light startup stage that cheap cost having been realized electric equipment, reached the intended purposes of start prompting, thereby effectively slowed down because electric equipment start-up time is long to anxiety and dislike that the consumer causes, strengthened the consumer to the confidence of product with to the good opinion of brand names.
Description of drawings
Fig. 1 is the schematic diagram of indicating circuit twinkling at start-up among the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.
The objective of the invention is to design a kind of electric equipment not automatic control circuit of the mutual flicker of the red blue indicator light of controlled stages of starting shooting that is applied to, this control circuit is made up of discrete component, be completely free of dependence to MCU software, cue startup stage of glimmering replacing of indicator light as electric equipment, tell the consumer that machine starts, please wait a moment, thereby slowed down the anxiety that the user produces owing to the device start overlong time, very beneficial to the confidence of product to strengthening the user.
For can be to the indicator light control of glimmering the electric equipment startup stage, the present invention have designed indicator light switch control circuit as shown in Figure 1.Among Fig. 1, D1 is a red light emitting diodes, and D2 is a blue LED, and its anode connects DC power supply VCC by resistance R 6, the R7 of series connection with it respectively, and minus earth constitutes the indicator light current supply circuit.In order to realize switch control to red, blue light-emitting diode D1, D2, in described indicator light current supply circuit, be in series with the gating switch of a switch element, the control end of described switch element connects a hysteresis loop comparator circuit, the break-make of the described switch element of high-low level signal controlling by hysteresis loop comparator circuit output, and then realize flicker control to red, blue light-emitting diode D1, D2.In order to simplify circuit structure, reduce cost, described switch element all adopts a NPN type triode Q2, Q3 to realize.Wherein, the base stage of switch triode Q2 connects the output of hysteresis loop comparator circuit, and connects DC power supply VCC through resistance R 12; The collector electrode of switch triode Q2 connects the negative electrode of red light emitting diodes D1, grounded emitter.When hysteresis loop comparator circuit output high level signal, switch triode Q2 conducting, red light emitting diodes D1 is luminous; When hysteresis loop comparator circuit output low level signal, switch triode Q2 ends, and red light emitting diodes D1 extinguishes, thereby has realized the flicker of red led.In order to reach the alternately purpose of flicker of red, blue indicator light, the base stage of switch triode Q3 is connected the output of hysteresis loop comparator circuit by negater circuit, and connect DC power supply VCC by resistance R 13; The collector electrode of described switch triode Q3 connects the negative electrode of blue LED D2, and grounded emitter by the on off operating mode of control triode Q3, realizes the flicker control to blue LED D2.In order to simplify the structure of negater circuit, described negater circuit also adopts a NPN type triode Q4 to realize.The base stage of described NPN type triode Q4 connects the output of hysteresis loop comparator circuit, grounded emitter, and collector electrode connects DC power supply VCC through resistance R 11 on the one hand, connects the base stage of described switch triode Q3 on the other hand.When hysteresis loop comparator circuit output high level signal, triode Q4 conducting, triode Q3 ends, and blue LED D2 extinguishes; When hysteresis loop comparator circuit output low level signal, triode Q4 ends, triode Q3 conducting, and blue LED D2 is luminous, thereby has realized the alternately flicker of red, blue bi-colour LED D1, D2, has improved the visual sense of beauty of electric equipment.
Include a comparator U1A in described hysteresis loop comparator circuit, its in-phase input end connects the potential-divider network of being made up of resistance R 1, R2, power supply VCC through resistance R 14 on the one hand, connects the output of described comparator U1A on the other hand by feedback resistance R3.The inverting input of comparator connects the output of described comparator U1A on the other hand on the one hand by storage capacitor C1 ground connection by feedback resistance R4.When system has just begun to power on, there is not pressure drop on the capacitor C 1, the in-phase input end voltage of comparator U1A is greater than inverting input voltage, comparator U1A exports high level, at this moment, red light emitting diodes D1 is luminous, and blue LED D2 extinguishes, and the voltage of comparator U1A output gives capacitor C 1 charging by feedback resistance R4.When capacitor C 1 both end voltage is higher than in-phase input end voltage, comparator U1A upset, the output low level signal jumps to V-under the comparator U1A in-phase input end voltage simultaneously, and at this moment, red light emitting diodes D1 extinguishes, and blue LED D2 is luminous.After the comparator U1A upset, storage capacitor C1 is by resistance R 4 discharges, when discharge voltage during less than V-, comparator U1A overturns once more, because the feedback effect of resistance R 3, in-phase input end voltage jumps to V+ immediately, after this, the hysteresis loop comparator circuit repeats said process, thereby has realized the alternately flicker of red, blue bi-colour LED D1, D2.
Certainly, also the circuit that is connected on comparator U1A in-phase input end and the inverting input can be exchanged, equally also can realize the switching of the high and low level of its output end voltage, realize flicker control red, blue bi-colour LED D1, D2.
In order to prevent that late-class circuit from impacting comparator U1A, between the output of described comparator U1A and late-class circuit, be connected with a switching diode D3.The anode of described switching diode D3 connects the output of comparator U1A, and negative electrode connects the base stage of described NPN type triode Q2 on the one hand, connects the base stage of NPN type triode Q4 in the described negater circuit on the other hand.
In order to realize that indicator light circuit glimmers in start process, and stop flicker after the normal operation of electric equipment, the feeder ear of described comparator U1A connects described DC power supply VCC by the gating switch of a switch element.The electric equipment master control borad sends control signal CONTROL by main control chip after the normal operation of system, control described switch element and disconnect, and cuts off comparator U1A power supply, and red, blue bi-colour LED D1, D2 no longer glimmer.In order to simplify circuit structure, reduce cost, the switch element of described connection comparator U1A feeder ear adopts a NPN type triode Q1 to realize.The base stage of described NPN type triode Q1 connects the control signal output ends of described electric equipment main control chip on the one hand by resistance R 9, connect described DC power supply VCC by resistance R 8 on the other hand; The collector electrode of described triode Q1 connects DC power supply VCC, and emitter connects the feeder ear of described comparator U1A.
For realize electric equipment start finish after, master control borad can carry out switch control to described indicator light circuit, the base stage of described NPN type triode Q2, Q3 respectively with electric equipment in the corresponding connection of two GPIO mouths of main control chip.After the electric equipment startup is finished, main control chip is taken over indicator light, send suitable switch controlling signal RED_CON or BLUE_CON, affact the base stage of triode Q2, Q3 respectively by diode D4, D5, control its break-make, and then realize the switch of red, blue bi-colour LED D1, D2 is controlled, indication mechanism enters normal operating conditions.
Alternately flicker to bi-colour LED startup stage that the present invention having realized electric equipment by adopting above-mentioned simple circuit configuration is controlled, can be widely used in all start-up times than in the long electric equipment circuit, reach the intended purposes that the consumer is started shooting and points out.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (10)
1. indicating circuit twinkling at start-up, comprise the indicator light current supply circuit, it is characterized in that: be connected with a switch element in described indicator light current supply circuit, the gating switch of described switch element is connected in the indicator light current supply circuit, and control end connects the output of a hysteresis loop comparator circuit; In described hysteresis loop comparator circuit, the first input end of comparator connects DC power supply through divider resistance on the one hand, connects the output of described comparator on the other hand through feedback resistance; Second input of described comparator connects storage capacitor on the one hand, connects the output of described comparator on the other hand through another feedback resistance; The output of described comparator connects the control end of described switch element, and the on off state of switch element is controlled.
2. indicating circuit twinkling at start-up according to claim 1, it is characterized in that: the feeder ear of described comparator connects described DC power supply by the gating switch of a switch element, the electric equipment master control borad sends control signal after the normal operation of system, control described switch element and disconnect, comparator quits work.
3. indicating circuit twinkling at start-up according to claim 2, it is characterized in that: the switch element that connects the comparator feeder ear is a NPN type triode, the base stage of described triode connects the control signal output ends of described electric equipment master control borad on the one hand, connects described DC power supply on the other hand; The collector electrode of described triode connects described DC power supply, and emitter connects the feeder ear of described comparator.
4. indicating circuit twinkling at start-up according to claim 2 is characterized in that: described indicator light comprises two, forms two indicator light current supply circuits with described DC power supply respectively, all is connected with a switch element in each indicator light current supply circuit; The output of described comparator connects wherein the control end of switch element in the indicator light current supply circuit on the one hand, connects the control end of switch element in the other indicator light current supply circuit on the other hand by negater circuit.
5. indicating circuit twinkling at start-up according to claim 4 is characterized in that: the described switch element that is connected in the indicator light current supply circuit all adopts a NPN type triode to realize; Wherein, the base stage of a NPN type triode directly connects the output of comparator, and the base stage of the 2nd NPN type triode is by the output of described negater circuit connection comparator, and collector and emitter is connected in the different indicator light current supply circuits.
6. indicating circuit twinkling at start-up according to claim 5 is characterized in that: the base stage of described first, second NPN type triode connects described DC power supply by a resistance separately.
7. according to claim 4 or 5 described indicating circuit twinkling at start-up, it is characterized in that: in described negater circuit, include a NPN type triode, the base stage of described triode connects the output of comparator, grounded emitter, collector electrode connects described DC power supply by resistance on the one hand, connects the base stage of described the 2nd NPN type triode on the other hand.
8. indicating circuit twinkling at start-up according to claim 2, it is characterized in that: the output of described comparator connects the anode of a switching diode, the negative electrode of described switching diode connects the base stage of a described NPN type triode on the one hand, connects the base stage of NPN type triode in the described negater circuit on the other hand.
9. indicating circuit twinkling at start-up according to claim 1 is characterized in that: the first input end of described comparator is the in-phase input end of comparator, and second input is the inverting input of comparator.
10. indicating circuit twinkling at start-up according to claim 7 is characterized in that: the base stage of described first, second NPN type triode respectively with electric equipment in the corresponding connection of two GPIO mouths of main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100700184A CN100446630C (en) | 2006-10-30 | 2006-10-30 | Indicating circuit twinkling at start-up |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100700184A CN100446630C (en) | 2006-10-30 | 2006-10-30 | Indicating circuit twinkling at start-up |
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| CN101175345A true CN101175345A (en) | 2008-05-07 |
| CN100446630C CN100446630C (en) | 2008-12-24 |
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| CNB2006100700184A Active CN100446630C (en) | 2006-10-30 | 2006-10-30 | Indicating circuit twinkling at start-up |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123543A (en) * | 2010-11-12 | 2011-07-13 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN102571043A (en) * | 2010-12-09 | 2012-07-11 | 上海华虹集成电路有限责任公司 | Regenerative comparator |
| CN107006098A (en) * | 2014-12-10 | 2017-08-01 | 汤姆逊许可公司 | Indicator circuit and the device using the indicator circuit |
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
| CN111131896A (en) * | 2019-05-28 | 2020-05-08 | 青岛海信宽带多媒体技术有限公司 | Method and device for controlling flickering of indicator light of set top box |
| CN112000375A (en) * | 2020-07-13 | 2020-11-27 | 深圳市智微智能软件开发有限公司 | Starting stage judgment method, device, equipment and storage medium of android system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5633565A (en) * | 1991-12-18 | 1997-05-27 | Interplex Solar, Inc. | Electronic flasher circuit |
| JPH10206942A (en) * | 1997-01-21 | 1998-08-07 | Minolta Co Ltd | Flash light emitting device and camera provided with the same |
| CN2571073Y (en) * | 2002-09-19 | 2003-09-03 | 合勤科技股份有限公司 | Fade in and fade down wireless transmission indicator lamp |
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2006
- 2006-10-30 CN CNB2006100700184A patent/CN100446630C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123543A (en) * | 2010-11-12 | 2011-07-13 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN102123543B (en) * | 2010-11-12 | 2015-01-21 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN102571043A (en) * | 2010-12-09 | 2012-07-11 | 上海华虹集成电路有限责任公司 | Regenerative comparator |
| CN107006098A (en) * | 2014-12-10 | 2017-08-01 | 汤姆逊许可公司 | Indicator circuit and the device using the indicator circuit |
| CN111131896A (en) * | 2019-05-28 | 2020-05-08 | 青岛海信宽带多媒体技术有限公司 | Method and device for controlling flickering of indicator light of set top box |
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
| CN112000375A (en) * | 2020-07-13 | 2020-11-27 | 深圳市智微智能软件开发有限公司 | Starting stage judgment method, device, equipment and storage medium of android system |
| CN112000375B (en) * | 2020-07-13 | 2023-12-26 | 深圳市智微智能软件开发有限公司 | Method, device, equipment and storage medium for judging startup stage of android system |
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| CN100446630C (en) | 2008-12-24 |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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