CN100390751C

CN100390751C - Condition indication circuit

Info

Publication number: CN100390751C
Application number: CNB200510036617XA
Authority: CN
Inventors: 陈惠玲
Original assignee: Mitac Computer Shunde Ltd; Mitac International Corp
Current assignee: Mitac Computer Shunde Ltd; Shunda Computer Factory Co Ltd; Mitac International Corp
Priority date: 2005-08-19
Filing date: 2005-08-19
Publication date: 2008-05-28
Anticipated expiration: 2025-08-19
Also published as: CN1916870A

Abstract

A state indication circuit is prepared as electric-connecting input end of the first driving circuit to a trigger end and its output end to input end of a conversion circuit, electric-connecting said trigger end to input end of the second driving circuit and output end of the second driving circuit to output end of conversion circuit, electric-connecting output end of conversion circuit to input end of a luminous unit and output end of said luminous unit to ground.

Description

Condition indication circuit

[Ji Intraoperative field]

The present invention is a kind of condition indication circuit, particularly a kind of condition indication circuit that helps user's resolution.

[Bei Jing Ji Intraoperative]

Along with advancing by leaps and bounds of electronics technology, various electronic products day by day popularly are applied in the middle of our work and life, especially present the most common electronic products such as computing machine periphery, generally there is multiple mode of operation in existing computing machine after start, for example comprise operating mode (working), sleep pattern (sleeping), use the whether bright of LED light always to show that computer run is in different mode of operations, i.e. bright showing computer run under operating mode by LED light, and going out by LED light to show that computer run is under sleep pattern.

But under computing machine was in off-mode, LED light was also for going out, thereby only relied on going out of LED light just to be difficult to distinguish computing machine to be to be under the shutdown mode, still to be under the sleep pattern, thereby, be difficult for being differentiated by the user.

[summary of the invention]

Fundamental purpose of the present invention is to provide a kind of condition indication circuit of the user's of helping resolution.

To achieve the above object, the invention provides a kind of condition indication circuit, be applicable to the mode of operation of indication one electronic installation, it comprises one first driving circuit, its input end is electrically connected to a trigger end, and its output terminal electrically connects the input end of a change-over circuit; And this trigger end electrically connects the input end of one second driving circuit, and the output terminal of second driving circuit electrically connects the output terminal of change-over circuit; The output terminal of change-over circuit electrically connects the input end of a luminescence unit, and the output head grounding of this luminescence unit.When trigger end is imported first trigger voltage, make the second driving circuit conducting and first driving circuit close, luminescence unit is luminous according to the output voltage continuation of second driving circuit; And when trigger end is imported second trigger voltage, make the first driving circuit conducting and second driving circuit close, at this moment, the output voltage of change-over circuit is done cyclical variation between greater than the value of luminescence unit forward voltage and the value less than the luminescence unit forward voltage, luminescence unit is luminous according to the output voltage intermittence of change-over circuit.

Xiang is in Xian You Ji Intraoperative, and the luminescence unit among the present invention can provide at least three kinds of luminous forms, promptly continue luminous, intermittence is luminous and not luminous (under shutdown mode); With corresponding different respectively operating modes.Therefore, no matter under shutdown mode, sleep pattern or operating mode, all can be distinguished, help the user and differentiate by the corresponding luminous form of luminescence unit.

[description of drawings]

Fig. 1 is the circuit block diagram of condition indication circuit of the present invention.

Fig. 2 is the circuit diagram of condition indication circuit of the present invention.

Fig. 3 is that the E point is in second trigger voltage and makes the voltage waveform that the time spent exports among Fig. 2.

[embodiment]

See also Fig. 1, a kind of condition indication circuit is applicable to the mode of operation of indication one electronic installation (for example personal computer), and this condition indication circuit comprises one first driving circuit 10, and the input end of this first driving circuit 10 is electrically connected to trigger end 60; And the output terminal of this first driving circuit 10 electrically connects the input end of a change-over circuit 30; In addition, this trigger end 60 electrically connects the input end of one second driving circuit 20, and the output terminal of this second driving circuit 20 electrically connects the output terminal of this change-over circuit 30; The output terminal of change-over circuit 30 electrically connects the input end of a luminescence unit 50, and the output head grounding of this luminescence unit 50.In present embodiment, this luminescence unit 50 can be light emitting diode.

See also shown in Figure 2, this first driving circuit 10 is provided with a first input end 100, this first input end 100 electrically connects an end of one first resistance R 11, and the other end of this first resistance R 11 is electrically connected to one first switching transistor Q11 (in present embodiment, this first switching transistor Q11 can be triode) base stage, the grounded emitter of this first switching transistor Q11, the collector of this first switching transistor Q11 then electrically connects an end of one second resistance R 12 and a second switch transistor Q12 (in present embodiment, this second switch transistor Q12 can be triode) base stage, and the other end of this second resistance R 12 is electrically connected to high voltage, and the grounded emitter of this second switch transistor Q12, the collector of this second switch transistor Q12 then electrically connects an end of one the 3rd resistance R 13 and one the 3rd switching transistor Q13 (in present embodiment, the 3rd switching transistor Q13 can be the P-channel metal-oxide-semiconductor transistor) grid, and the other end of the 3rd resistance R 13 is electrically connected to high voltage, and the drain electrode of the 3rd switching transistor Q13 is electrically connected to one first input power supply V _CC1, and the source electrode of the 3rd switching transistor Q13 electrically connects this change-over circuit 30.

This change-over circuit 30 comprises a chip 31 and a peripheral circuit thereof, can make periodically variable electric signal between peak value (maximal value) and valley (minimum value) in order to output.In present embodiment, the model of this chip 31 is NE555, in addition, and the V of this chip 31 _CCEnd electrically connects the source electrode of the 3rd switching transistor Q13, and the OUT of this chip 31 end electrically connects one group of RC loop, in present embodiment, is provided with two RC loops in the change-over circuit 30, with the prolongation cycle.Wherein, the OUT end of this chip 31 electrically connects the end of one the 4th resistance R L1, and the other end of the 4th resistance R L1 electrically connects the end of one first capacitor C L1 and the end of one the 5th resistance R L2, and the other end ground connection of this first capacitor C L1, and the other end of the 5th resistance R L2 is electrically connected to the input end of luminescence unit 50 and the end of one second capacitor C L2, and the other end ground connection of this second capacitor C L2.

This second driving circuit 20 is provided with one second input end 200, this second input end 200 electrically connects an end of one the 6th resistance R 21, and the other end of the 6th resistance R 21 is electrically connected to one the 4th switching transistor Q21 (in present embodiment, the 4th switching transistor Q21 can be triode) base stage, the grounded emitter of the 4th switching transistor Q21, the collector of the 4th switching transistor Q21 then electrically connects an end of one the 7th resistance R 22 and one the 5th switching transistor Q22 (in present embodiment, the 5th switching transistor is the P-channel metal-oxide-semiconductor transistor) grid, and the other end of the 7th resistance R 22 is electrically connected to high voltage, and the drain electrode of the 5th switching transistor Q22 is electrically connected to an end of one the 8th resistance R 23, the source electrode of the 5th switching transistor Q22 then electrically connects the positive pole of a diode D21, and the other end of the 8th resistance R 23 is electrically connected to the second input power supply V _CC2, and the negative pole of this diode D21 is electrically connected to the input end of luminescence unit 50.

When trigger end 60 input first trigger voltages (as high voltage), in first driving circuit 10, the first switching transistor Q11 conducting, the voltage that inputs to the base stage of second switch transistor Q12 is low-voltage, and make second switch transistor Q12 close, thereby first driving circuit 10 cuts out.And in second driving circuit 20, the 4th switching transistor Q21 conducting, the voltage that inputs to the grid of the 5th switching transistor Q22 is low-voltage, at this moment, the 5th switching transistor Q22 conducting so, can make this second driving circuit, 20 conductings, at this moment, to carry out continuation according to the output voltage of second driving circuit 20 luminous for luminescence unit 50.

And when trigger end 60 input second trigger voltages (as low-voltage), in first driving circuit 10, the first switching transistor Q11 closes, the voltage that inputs to the base stage of second switch transistor Q12 is high voltage, and make second switch transistor Q12 conducting, then, the voltage that inputs to the grid of the 3rd switching transistor Q13 is low-voltage, then the 3rd switching transistor Q13 conducting, thereby with 10 conductings of first driving circuit, and make change-over circuit 30 work, the voltage waveform of change-over circuit 30 outputs (being E point place) can be consulted shown in Figure 3, as shown in Figure 3, the voltage swing at E point place is done cyclical variation between maximal value (forward voltage that is higher than luminescence unit 50) and minimum value (being lower than the forward voltage of luminescence unit 50), can make luminescence unit 50 luminous in a period of time, and not luminous in the period at another section, it is luminous to be called intermittence.And in second driving circuit 20, the 4th switching transistor Q21 closes, and the voltage that inputs to the grid of the 5th switching transistor Q22 is high voltage, and then the 5th switching transistor Q22 closes, and so, can make this second driving circuit 20 close.At this moment, to carry out intermittence according to the output voltage of change-over circuit 30 luminous for luminescence unit 50.

Generally speaking, electronic installation is under off-mode, and luminescence unit 50 is in closed condition, can be with the not luminous shutdown mode that is defined as of luminescence unit 50; In addition, can be with the luminous operating mode that is defined as of luminescence unit 50 continuation; And with the luminous sleep pattern that is defined as of luminescence unit 50 intermittences; So, luminescence unit 50 in the corresponding different respectively mode of operation of different luminous forms, is convenient to the user and is differentiated with visual sense.

Claims

1. a condition indication circuit is applicable to the mode of operation of indicating an electronic installation, and it comprises:

One first driving circuit, the input end of this first driving circuit is electrically connected to a trigger end;

One change-over circuit, the input end of this change-over circuit is electrically connected to the output terminal of first driving circuit;

One second driving circuit, the input end of this second driving circuit is electrically connected to described trigger end, and the output terminal of this second driving circuit is electrically connected to the output terminal of change-over circuit;

One luminescence unit, the input end of this luminescence unit is electrically connected to the output terminal of change-over circuit, and the output head grounding of this luminescence unit;

When trigger end is imported first trigger voltage, make this second driving circuit conducting and this first driving circuit close, at this moment, it is luminous that luminescence unit carries out continuation according to the output voltage of second driving circuit; And when trigger end is imported second trigger voltage, make this first driving circuit conducting and this second driving circuit close, at this moment, the output voltage of change-over circuit is done cyclical variation between greater than the value of luminescence unit forward voltage and the value less than the luminescence unit forward voltage, it is luminous that luminescence unit carries out intermittence according to the output voltage of change-over circuit.

2. condition indication circuit according to claim 1 is characterized in that: this luminescence unit can be light emitting diode.

3. condition indication circuit according to claim 1, it is characterized in that: this first driving circuit is provided with a first input end, this first input end electrically connects an end of one first resistance, and the other end of this first resistance is electrically connected to the base stage of one first switching transistor, the grounded emitter of this first switching transistor, the collector of this first switching transistor then electrically connects an end and the transistorized base stage of a second switch of one second resistance, and the other end of this second resistance is electrically connected to high voltage, and the transistorized grounded emitter of this second switch, the transistorized collector of this second switch then electrically connects an end of one the 3rd resistance and the grid of one the 3rd switching transistor, and the other end of the 3rd resistance is electrically connected to high voltage, and the drain electrode of the 3rd switching transistor is electrically connected to the first input power supply, and the source electrode of the 3rd switching transistor electrically connects this change-over circuit.

4. condition indication circuit according to claim 3 is characterized in that: the 3rd switching transistor is the P-channel metal-oxide-semiconductor transistor.

5. condition indication circuit according to claim 3 is characterized in that: this change-over circuit comprises a chip and peripheral circuit thereof.

6. condition indication circuit according to claim 5 is characterized in that: the VCC end of this chip electrically connects the source electrode of the 3rd switching transistor, and the OUT of this chip end electrically connects one group of capacitance-resistance loop.

7. condition indication circuit according to claim 6, it is characterized in that: be provided with two capacitance-resistance loops in the change-over circuit, wherein, the OUT end of this chip electrically connects an end of one the 4th resistance, and the other end of the 4th resistance electrically connects an end of one first electric capacity and an end of one the 5th resistance, and the other end ground connection of this first electric capacity, and the other end of the 5th resistance is electrically connected to the input end of luminescence unit and an end of one second electric capacity, and the other end ground connection of this second electric capacity.

8. condition indication circuit according to claim 7, it is characterized in that: this second driving circuit is provided with one second input end, this second input end electrically connects an end of one the 6th resistance, and the other end of the 6th resistance is electrically connected to the base stage of one the 4th switching transistor, the grounded emitter of the 4th switching transistor, the collector of the 4th switching transistor then electrically connects an end of one the 7th resistance and the grid of one the 5th switching transistor, and the other end of the 7th resistance is electrically connected to high voltage, and the drain electrode of the 5th switching transistor is electrically connected to an end of one the 8th resistance, the source electrode of the 5th switching transistor then electrically connects the positive pole of a diode, and the other end of the 8th resistance is electrically connected to the second input power supply, and the negative pole of this diode is electrically connected to the input end of luminescence unit.

9. condition indication circuit according to claim 8 is characterized in that: the 5th switching transistor is the P-channel metal-oxide-semiconductor transistor.