CN109425804A - Power off instruction device and its power-off indicating means - Google Patents
Power off instruction device and its power-off indicating means Download PDFInfo
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- CN109425804A CN109425804A CN201710777407.9A CN201710777407A CN109425804A CN 109425804 A CN109425804 A CN 109425804A CN 201710777407 A CN201710777407 A CN 201710777407A CN 109425804 A CN109425804 A CN 109425804A
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- power
- epd
- display device
- electrophoretic display
- power supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
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Abstract
The present invention provides a kind of power-off instruction device and its power-off indicating means.Power failure detection circuit provides storage voltage to electrophoretic display device (EPD) when power cut-off, shows power cut-off information to control electrophoretic display device (EPD).Display state of the label reader according to the electronic tag resetting electrophoretic display device (EPD) read.So it can effectively indicate whether power supply once powered off, without having the problem of needing continued power.In addition, ease of use can be improved in the display state for resetting electrophoretic display device (EPD) according to the read electronic tag of label reader, and it can reach the effect of encipherment protection.
Description
Technical field
The present invention relates to a kind of instruction device more particularly to a kind of power-off instruction device and its power-off indicating means.
Background technique
In general, electronic device usually can all be equipped with the state indicating device for being exposed to casing, to make user much of that
Solve the operating state of electronic device.For example, the power-off indicator in safety system or food product freezing unit can utilize instruction
Whether lamp or LCD screen normal to indicate power supply supply, for example whether once powered off, with ensure user home safety or
The quality of food is without anxiety.Usually, state indicating device need to continue to supply additional power supply (such as battery), with ensure can be just
It often is shown, so so will constantly consume power supply.
Summary of the invention
The present invention provides a kind of power-off instruction device and its power-off indicating means, can effectively indicate whether power supply once broke
Electricity, without constantly supplying electricity to power-off instruction device.
Power-off instruction device of the invention includes electrophoretic display device (EPD), power failure detection circuit and label reader.Power-off inspection
Slowdown monitoring circuit couples electrophoretic display device (EPD), and power failure detection circuit detects power supply, and provides storage voltage to electrophoresis when power cut-off
Display shows power cut-off information to control electrophoretic display device (EPD).Label reader couples electrophoretic display device (EPD), and label reader is readable
Electronic tag is taken, to reset the display state of electrophoretic display device (EPD).
In one embodiment of this invention, above-mentioned power failure detection circuit includes power storage element and switching circuit.
The first end of power storage element is coupled to power supply, and the second end of power storage element couples ground connection.Switching circuit is coupled to electricity
Between source and electrophoretic display device (EPD), the supply voltage provided by power supply is in an off state when being not below critical voltage, in power supply
It is in the conductive state when voltage is lower than critical voltage, and the storage voltage that power storage element is stored is supplied to electrophoresis showed
Device.
In one embodiment of this invention, above-mentioned switching circuit includes bleeder circuit and switch.Bleeder circuit coupling
Power supply, dividing voltage supply voltage is to provide branch pressure voltage.Switch is coupled between power supply and electrophoretic display device (EPD), the control termination of switch
Receive branch pressure voltage.
In one embodiment of this invention, above-mentioned bleeder circuit includes first resistor and second resistance.Second resistance
It is serially connected between the first end of power storage element and ground connection with first resistor, and the common joint of first resistor and second resistance
Couple the control terminal of power supply and switch.
In one embodiment of this invention, above-mentioned switch includes P-type transistor.
In one embodiment of this invention, above-mentioned power failure detection circuit includes rectification circuit, couples power supply, switching circuit
With power storage element, the electric current for flowing through rectification circuit uniaxially flows to power storage element by power supply.
In one embodiment of this invention, above-mentioned electronic tag includes near-field communication label, and reader includes that near field is logical
Interrogate reader.
The present invention also provides a kind of power-off indicating means for powering off instruction device, power-off instruction device includes electrophoresis showed
Device, the power-off indicating means for powering off instruction device include the following steps.Detect power supply.Judge whether power supply powers off.It is disconnected in power supply
When electric, storage voltage is provided to electrophoretic display device (EPD), shows power cut-off information to control electrophoretic display device (EPD).And judge whether to read
Electronic tag.If reading electronic tag, the display state of electrophoretic display device (EPD) is reset.
In one embodiment of this invention, above-mentioned electronic tag includes near-field communication label, and reader includes that near field is logical
Interrogate reader.
In one embodiment of this invention, if power supply does not power off, the power storage element in power-off instruction device is carried out
Charging, power storage element charge to provide storage voltage.
Based on above-mentioned, the power failure detection circuit of the embodiment of the present invention it is aobvious to electrophoresis can to provide storage voltage in power cut-off
Show device, shows power cut-off information to control electrophoretic display device (EPD), its display can be maintained since electrophoretic display device (EPD) is not required to constantly power
Content, therefore can effectively indicate whether power supply once powered off, without having the problem of needing continued power.In addition, according to label
Ease of use can be improved to reset the display state of electrophoretic display device (EPD) in the read electronic tag of reader, and can reach encryption
The effect of protection.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the power-off instruction device of one embodiment of the invention；
Fig. 2 is the schematic diagram according to the power failure detection circuit of one embodiment of the invention；
Fig. 3 is the schematic diagram according to the power failure detection circuit of another embodiment of the present invention；
Fig. 4 is the flow chart according to the power-off indicating means of the power-off instruction device of one embodiment of invention.
Description of symbols:
100: power-off instruction device；
102: electrophoretic display device (EPD)；
104: power failure detection circuit；
106: label reader；
202: power storage element；
204: switching circuit；
206: rectification circuit；
302: bleeder circuit；
304: switch；
VC: storage voltage；
VDD: power supply；
C1: capacitor；
D1: diode；
R1, R2: resistance；
Q1:P transistor npn npn；
S402~S410: the power-off indicating means step of instruction device is powered off.
Specific embodiment
Fig. 1 is to please refer to Fig. 1 according to the schematic diagram of the power-off instruction device of one embodiment of the invention.Power off instruction device
100 include electrophoretic display device (EPD) 102, power failure detection circuit 104 and label reader 106, the coupling power-off inspection of electrophoretic display device (EPD) 102
Slowdown monitoring circuit 104 and label reader 106.Electrophoretic display device (EPD) 102 can be used to show the power supply that power-off instruction device 100 is monitored
The power supply situation of VDD, for example, if power vd D was not powered off, electrophoretic display device (EPD) 102 is displayed in white picture, and (it also can be considered
Picture material is not shown), and when power vd D power-off, electrophoretic display device (EPD) 102, which is displayed in white picture, can be displayed in red picture, value
It obtains it is noted that color shown by electrophoretic display device (EPD) 102 or content are not limited thereto.Power failure detection circuit 104 is detectable
The power supply situation of power vd D, when power cut-off, power failure detection circuit 104 can provide storage voltage VC to electrophoretic display device (EPD) 102,
Power cut-off information (red picture as escribed above) is shown to control electrophoretic display device (EPD) 102.It is not required to since electrophoretic display device (EPD) 102 has
Continued power can maintain the characteristic of display picture to pixel, therefore receive storage voltage VC in electrophoretic display device (EPD) 102 and change
After it shows picture, i.e., the display picture after changing sustainably is maintained, without constantly receiving voltage again.Therefore, it powers off
Instruction device 100 can effectively indicate whether power vd D once powered off, and need asking for additional power supply continued power without having
Topic.In addition, showing power cut-off information using electrophoretic display device (EPD) 102 other than it can lower electrical source consumption, power-off instruction can be also reduced
The cost of manufacture of device 100.
In addition, to avoid user from (such as being shown that picture is reset in the display state of resetting electrophoretic display device (EPD) 102
White picture) when, it need to will be disassembled in 102 Self-disconnecting instruction device 100 of electrophoretic display device (EPD), additional power supply pair could be used
Electrophoretic display device (EPD) 102 is reset.The power-off instruction device 100 of the present embodiment can reset electrophoresis by label reader 106
Display 102, i.e., power supply needed for providing resetting electrophoretic display device (EPD) 102 by label reader 106 are aobvious without dismantling electrophoresis
Show device 102, and then ease of use can be effectively improved.Label reader 106 can be used to read electronic tag, and electronic tag can
For example, RFID tag (Radio Frequency Identification (RFID) tag) or near-field communication label
(Near Field Communication (NFC) tag) etc., is so not limited, electronic tag can for example record user information,
Instruct (such as reset indication) ... etc..Label reader 106 can be according to the information in read electronic tag, to reset electricity
The display state of phoretic display 102.
Furthermore, it is understood that label reader 106 may include RFID core in the case where electronic tag is realized with RFID label tag
Piece (not shown), in the case where electronic tag is realized with NFC label, label reader 106 may include that NFC chip (is not shown
Out).Alternatively, label reader 106 may also comprise the chip for combining RFID chip and NFC chip, so that label is read
Take device 106 that NFC label also can be read in addition to RFID label tag can be read.In addition, label reader 106 can also be for example including microcontroller
Device (not shown), the information (such as reset indication) that can be read according to RFID chip or NFC chip are aobvious to control electrophoresis
Show that device 102 resets it and shows picture.So electrophoretic display device (EPD) is reset according to the read electronic tag of label reader 106
102 display state also can reach the effect of encipherment protection other than ease of use can be improved.
Fig. 2 is according to the schematic diagram of the power failure detection circuit of one embodiment of the invention, referring to figure 2..On furthermore, it is understood that
When stating the embodiment party of power failure detection circuit can for example shown in Fig. 2, power failure detection circuit can for example including power storage element 202,
Switching circuit 204 and rectification circuit 206.Wherein rectification circuit 206 is coupled between power vd D and switching circuit 204, is used
202 one end of power storage element is uniaxially flowed to by the one end power vd D to flow through the electric current of rectification circuit 206.In this implementation
In example, rectification circuit 206 is to be implemented with diode D1, is so not limited.The first end of power storage element 202 is coupled to
The second end of rectification circuit 206, power storage element 202 couples ground connection, and power storage element 202 can be for example with the present embodiment
Capacitor C1 is implemented, and is so not limited.Capacitor C1 may be, for example, super capacitor or double layer capacitor (Electrical
Double-Layer Capacitor,EDLC).In addition, switching circuit 204 is coupled to rectification circuit 206 and electrophoretic display device (EPD) 102
Between, on state is controlled by the supply voltage of power vd D.For example, it (is supplied when power vd D has supply voltage
Electricity condition, supply voltage are greater than the critical voltage of diode D1), power vd D charges to power storage element 202 at this time.
And when supply voltage is without input (off-position, supply voltage are less than the critical voltage of diode D1), it is previously stored at this time
It is discharged in the electric energy of power storage element 202, and storage electricity can be provided to electrophoretic display device (EPD) 102 by switching circuit 204
VC is pressed, so that electrophoretic display device (EPD) 102 shows power cut-off information.It can be maintained since electrophoretic display device (EPD) 102 is not required to constantly power
Show content, and effectively whether instruction power vd D once powered off, and therefore, can reach energy-efficient effect.
Fig. 3 is according to the schematic diagram of the power failure detection circuit of another embodiment of the present invention, referring to figure 3..In the present embodiment
In, switching circuit 204 may include bleeder circuit 302 and switch 304, and bleeder circuit 302 is coupled to power vd D and switch 304
Control terminal, switch 304 is further coupled between rectification circuit 206 and electrophoretic display device (EPD) 102.In the present embodiment, bleeder circuit
302 can be for example including resistance R1 and resistance R2, and switch 304 then can for example be implemented with P-type transistor Q1, so not as
Limit.Resistance R1 and R2 are serially connected between the first end and ground connection of power storage element 202, and resistance R1 and resistance R2 connects jointly
The control terminal of point coupling power vd D and switch 204.Bleeder circuit 302 can divide supply voltage provided by power vd D
It presses and provides branch pressure voltage to the control terminal of switch 204.It is not below furthermore, it is understood that working as supply voltage provided by power vd D
When critical voltage (power supply state), branch pressure voltage provided by the common joint of resistance R1 and resistance R2 can make P-type transistor
Q1 is in an off state, and power vd D charges to power storage element 202 by rectification circuit 206 at this time.And work as power supply
When supply voltage provided by VDD is lower than critical voltage (such as off-position), resistance R1 and the common joint of resistance R2 are mentioned
The branch pressure voltage of confession will make P-type transistor Q1 in the conductive state, and electrophoretic display device (EPD) 102 can pass through power storage element at this time
Voltage is stored provided by 202 to drive, and electrophoretic display device (EPD) 102 is made to show power cut-off information.
It is worth noting that, in some embodiments, the power failure detection circuit of above-described embodiment also may not include rectified current
Road 206, that is to say, that the first end and switching circuit 204 of power storage element 202 can be not required to through 206 coupling of rectification circuit
It is connected to power vd D.
Fig. 4 is to please refer to figure according to the flow chart of the power-off indicating means of the power-off instruction device of one embodiment of the invention
4.As can be seen from the above embodiments, the power-off indicating means for powering off instruction device can include at least the following steps.Firstly, detection power supply
(step S402).Next, it is determined that whether power supply powers off (step S404).When power cut-off, it is aobvious to electrophoresis to provide storage voltage
Show device, shows power cut-off information (step S406) to control electrophoretic display device (EPD).On the contrary, returning to step if power supply does not power off
S402 continues to test power supply.In addition, can then judge whether to read electronic tag (step S408) after step S406,
When reading electronic tag, the display state (step S410) of electrophoretic display device (EPD) can be reset, continue power-off instruction device can
Ground detects the power supply situation of power supply, and the ease of use of power-off instruction device so can be improved, and achievees the effect that encipherment protection.
On the contrary, returning to step S408 if unread arrive electronic tag, continuing to determine whether to read electronic tag.
In conclusion the power failure detection circuit of the embodiment of the present invention can provide storage voltage to electrophoresis when power cut-off
Display shows power cut-off information to control electrophoretic display device (EPD), it can be maintained aobvious since electrophoretic display device (EPD) is not required to constantly power
Show content, therefore can effectively indicate whether power supply once powered off, without having the problem of needing continued power.In addition, according to mark
It signs the read electronic tag of reader and ease of use can be improved to reset the display state of electrophoretic display device (EPD), and can reach and add
The effect of privacy protection.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of power-off instruction device characterized by comprising
Electrophoretic display device (EPD)；
Power failure detection circuit couples the electrophoretic display device (EPD), and the power failure detection circuit detects power supply, and is mentioned in the power supply
The supply voltage of confession provides storage voltage to the electrophoretic display device (EPD) when being lower than critical voltage, shown with controlling the electrophoretic display device (EPD)
Show power cut-off information；And
Label reader couples the electrophoretic display device (EPD), and the label reader reads electronic tag, aobvious to reset the electrophoresis
Show the display state of device.
2. power-off instruction device according to claim 1, which is characterized in that the power failure detection circuit includes:
Power storage element, first end couple the power supply, the second end ground connection of the power storage element；And
Switching circuit is coupled between the power supply and the electrophoretic display device (EPD), the power supply electricity provided by Yu Suoshu power supply
When pressure is not below the critical voltage, the power supply charges to the power storage element, and Yu Suoshu supply voltage is lower than
When the critical voltage, the storage voltage that the power storage element is stored is supplied to the electrophoretic display device (EPD).
3. power-off instruction device according to claim 2, which is characterized in that the switching circuit includes:
Bleeder circuit, couples the power supply, and the bleeder circuit divides the supply voltage to provide branch pressure voltage；And
Switch, is coupled between the power supply and the electrophoretic display device (EPD), and the control terminal of the switch receives the branch pressure voltage.
4. power-off instruction device according to claim 3, which is characterized in that the bleeder circuit includes:
First resistor；And
Second resistance is serially connected between the first end of the power storage element and the ground connection with the first resistor, described
The common joint of first resistor and the second resistance couples the control terminal of the power supply and the switch.
5. power-off instruction device according to claim 3, which is characterized in that the switch includes P-type transistor.
6. power-off instruction device according to claim 2, which is characterized in that the power failure detection circuit includes:
Rectification circuit couples the power supply, the switching circuit and the power storage element.
7. power-off instruction device according to claim 2, which is characterized in that the electronic tag includes near-field communication mark
Label, the reader includes near-field communication reader.
8. a kind of power-off indicating means for powering off instruction device, which is characterized in that the power-off instruction device includes electrophoresis showed
Device, the power-off indicating means for powering off instruction device include:
Detect power supply；
Judge whether supply voltage provided by the power supply is lower than critical voltage；
Supply voltage is stated provided by the power supply lower than when stating critical voltage, providing storage voltage to the electrophoresis showed
Device shows power cut-off information to control the electrophoretic display device (EPD)；
Judge whether to read electronic tag；And
If reading the electronic tag, the display state of the electrophoretic display device (EPD) is reset.
9. the power-off indicating means of power-off instruction device according to claim 8, which is characterized in that the electronic tag packet
Near-field communication label is included, the reader includes near-field communication reader.
10. the power-off indicating means of power-off instruction device according to claim 8, which is characterized in that if the power supply is not
Power-off, to it is described power-off instruction device in power storage element charge, the power storage element charge to
The storage voltage is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777407.9A CN109425804A (en) | 2017-09-01 | 2017-09-01 | Power off instruction device and its power-off indicating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777407.9A CN109425804A (en) | 2017-09-01 | 2017-09-01 | Power off instruction device and its power-off indicating means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109425804A true CN109425804A (en) | 2019-03-05 |
Family
ID=65505505
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710777407.9A Pending CN109425804A (en) | 2017-09-01 | 2017-09-01 | Power off instruction device and its power-off indicating means |
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| CN101063701A (en) * | 2006-12-05 | 2007-10-31 | 上海电器科学研究所（集团）有限公司 | Electronically controlled memory type indicating fault apparatus |
| CN201341170Y (en) * | 2008-12-23 | 2009-11-04 | 重庆工商大学 | Household security protection device for dealing the power failure or telephone circuit abnormal situation |
| TWM396778U (en) * | 2010-04-19 | 2011-01-21 | Ming-Yang Lu | Car anti-theft device with power-off memory information display unit |
| CN201935739U (en) * | 2010-11-29 | 2011-08-17 | 广州奥熠电子科技有限公司 | Electrophoretic display detecting system and electrophoretic display detecting device |
| CN107064686A (en) * | 2017-04-25 | 2017-08-18 | 海信（山东）冰箱有限公司 | A kind of abnormal power-down determination methods, apparatus and system |
| US10290268B2 (en) * | 2017-09-01 | 2019-05-14 | E Ink Holdings Inc. | Power off indicating apparatus and power off indicating method thereof |
-
2017
- 2017-09-01 CN CN201710777407.9A patent/CN109425804A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063701A (en) * | 2006-12-05 | 2007-10-31 | 上海电器科学研究所（集团）有限公司 | Electronically controlled memory type indicating fault apparatus |
| CN201341170Y (en) * | 2008-12-23 | 2009-11-04 | 重庆工商大学 | Household security protection device for dealing the power failure or telephone circuit abnormal situation |
| TWM396778U (en) * | 2010-04-19 | 2011-01-21 | Ming-Yang Lu | Car anti-theft device with power-off memory information display unit |
| CN201935739U (en) * | 2010-11-29 | 2011-08-17 | 广州奥熠电子科技有限公司 | Electrophoretic display detecting system and electrophoretic display detecting device |
| CN107064686A (en) * | 2017-04-25 | 2017-08-18 | 海信（山东）冰箱有限公司 | A kind of abnormal power-down determination methods, apparatus and system |
| US10290268B2 (en) * | 2017-09-01 | 2019-05-14 | E Ink Holdings Inc. | Power off indicating apparatus and power off indicating method thereof |
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Application publication date: 20190305 |