CN208445795U - The Adaptive Suppression circuit and LED light source driving circuit of remnants ripple electric current - Google Patents
The Adaptive Suppression circuit and LED light source driving circuit of remnants ripple electric current Download PDFInfo
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- CN208445795U CN208445795U CN201820807401.1U CN201820807401U CN208445795U CN 208445795 U CN208445795 U CN 208445795U CN 201820807401 U CN201820807401 U CN 201820807401U CN 208445795 U CN208445795 U CN 208445795U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of Adaptive Suppression circuits of remnants ripple electric current in pulsation constant current, are related to electronic technology field, comprising: voltage controlled current source (1)；The voltage controlled current source (1), connect with error calculation circuit；The error calculation circuit is connect with current potential sample circuit；The current potential sample circuit, for acquiring the current potential present in the ripple voltage trough of load (such as LED light source) cold end；The error calculation circuit forms deviation for comparing current potential at the trough with reference potential；The voltage controlled current source (1) exports electric current according to the bias adjustment.And LED light source driving circuit.To solve the problems, such as remnants ripple electric current in pulsation constant current.
Description
Technical field
The utility model relates to electronic technology field, specifically a kind of Adaptive Suppression circuit of remnants ripple electric current and
LED light source driving circuit, refer in particular to it is a kind of pulsation constant current in remnants ripple electric current Adaptive Suppression circuit and LED light source drive
Dynamic circuit.
Background technique
Ripple current/voltage be as DC stable power supply (constant current source/constant voltage source) current/voltage fluctuation and caused by
A kind of phenomenon, because DC stable power supply is usually to be formed by links such as the rectified filtering of alternating source, this can not just be kept away
How much remaining pulsation Alternating Component is had in DC stabilization amount with exempting from.This flutter component being superimposed upon in DC stabilization amount
Just referred to as ripple.Correspondingly, it is superimposed with ripple current/voltage constant current/constant voltage, is just referred to as pulsation constant current/constant voltage.Generally
In fact, due to the presence of filter capacitor, exponential type discharge and recharge rule makes ripple current/low pressure waveform shape approximation three
It is angular.For different occasions, the requirement to ripple is not quite similar.The utility model is specifically for the remaining line in pulsation constant current
Wave electric current, and Adaptive Suppression is carried out to it.
The common methods for further suppressing ripple current are to increase filter capacitor capacity, but the final effect of this method is simultaneously
It is undesirable.Although then ripple current is smaller this is because theoretically filter capacitor capacity is bigger, increases capacitance and exist
While so that ripple current is become smaller, also the volume of capacitor and cost can be made to ramp.Importantly, because of the electricity for filtering
The high frequency response for solving capacitor is natively poor, and capacity is bigger, and high frequency response is also poorer, thus for dither constant current and
Radio-frequency component in ripple current, even if not taking volume and cost into account, when filter capacitor capacity greatly to a certain extent after, continue to increase
Large capacity will also become almost without practical significance.
Industry generally acknowledges that, to guarantee that the LED light source component in work is stable, long-lived, LED light source component must be by preset perseverance
Determine DC current (hereinafter referred to as " constant current ") driving.However, at present " constant current " provided by almost all of LED drive circuit
In, there is remaining ripple current to a certain extent.So this " constant current ", actually the pulsation constant current.
Current ripples coefficient is the significant electric parameter of ripple current proportion in characterization pulsation constant current.The driving of LED seen at present
In circuit, current ripples coefficient is typically up to positive and negative more than ten percent or even positive and negative tens percent.
Excessive current ripples coefficient can not only reduce the LED light source component service life, but also be formed by by ripple current low
Frequency or high frequency stroboscopic would be possible to make that periodic light and shade variation is presented according to environment and body surface.Although stroboscopic phenomenon human eye
It is difficult to perceive, but stroboscopic deteriorated vision is confirmed by medicine, and more serious stroboscopic is possible to that photography, camera picture can be made to go out
Existing blanking bar, it is also possible to the rotation speed for making machine that personnel be added to judge workpiece by accident, or even the direction of rotation of erroneous judgement workpiece.
Summary of the invention
In view of this, the present invention provides a kind of Adaptive Suppression circuits of remnants ripple electric current, by effectively inhibiting
Remnants ripple electric current in pulsation constant current significantly reduces current ripples coefficient, and then is macroscopically eliminating stroboscopic and its possibility
The various harm of bring.And the LED light source driving circuit using it.To solve remnants ripple electric current in LED light source driving circuit
The problem of.
In a first aspect, the utility model provides a kind of Adaptive Suppression circuit of remnants ripple electric current, comprising:
A kind of Adaptive Suppression circuit of remnants ripple electric current characterized by comprising
Voltage controlled current source；
The voltage controlled current source, connect with error calculation circuit；The error calculation circuit is connect with current potential sample circuit；
The current potential sample circuit, for acquiring the current potential present in the ripple voltage trough of load cold end；
The error calculation circuit forms deviation for comparing current potential at the trough with reference potential；
The voltage controlled current source exports electric current according to the bias adjustment.
Preferably, the error calculation circuit is also connect with amplifying circuit；The amplifying circuit and the voltage controlled current source
Connection；
The amplifying circuit forms error and amplifies voltage for amplifying the deviation；
The error calculation circuit and the amplifying circuit constitute error amplifying circuit.
Preferably, also there is smoothed filter circuit between the voltage controlled current source and the error amplifying circuit；
The smoothed filter circuit, for carrying out the disposal of gentle filter to error amplification voltage.
Preferably, the current potential sample circuit, also connect with sample value holding circuit, the sample value holding circuit and the mistake
Poor amplifying circuit connection.
The sample value holding circuit, for keeping sampled value in the non-sampled period.
Preferably, the current potential sample circuit, also connect with decision circuitry；
The decision circuitry, the trough of the ripple voltage for judging to appear in load cold end.
Preferably, the decision circuitry, the current potential sample circuit, the sample value holding circuit constitute current potential sampling and keep
Circuit.
Preferably, the error amplifying circuit, also connect with reference circuit；
The reference circuit, for providing reference potential for the error amplifying circuit.
Preferably, the Adaptive Suppression circuit of a kind of remnants ripple electric current, further includes:
Voltage regulator circuit；
The voltage regulator circuit, for providing voltage stabilization for a kind of Adaptive Suppression circuit of remnants ripple electric current
Internal work power supply.
Second aspect, the utility model provide a kind of LED light source driving circuit, comprising: such as a kind of above-mentioned remnants ripple electricity
The Adaptive Suppression circuit of stream；And
LED light；
The Adaptive Suppression circuit of remnants ripple electric current, is serially connected in the electric current of the LED light in a kind of pulsation constant current
In circuit；The LED light two sides are simultaneously connected to filter circuit.
Preferably, the filter circuit is filter capacitor.
Preferably, the LED light is connect with default constant-current source；
The default constant-current source is switch mode constant current source or high ripple constant-current source；
The default constant-current source is powered for the LED light.
The utility model at least has the following beneficial effects:
The utility model provides a kind of Adaptive Suppression circuit of remnants ripple electric current, to solve remaining line in pulsation constant current
The problem of wave electric current, significantly reduces current ripples coefficient, in turn by effectively inhibiting the remnants ripple electric current in pulsation constant current
Macroscopically eliminating stroboscopic and its possible various harm.And the LED light source driving circuit using it, solve LED light source
In driving circuit the problem of remnants ripple electric current.
Detailed description of the invention
By the description below with reference to attached drawing to the utility model embodiment, the above-mentioned and other mesh of the utility model
, feature and advantage it is apparent, in the accompanying drawings:
Fig. 1 is Adaptive Suppression circuit and the LED light source driving of a kind of remnants ripple electric current of the utility model embodiment
Schematic block circuit diagram；
Fig. 2 is a kind of circuit diagram of the Adaptive Suppression circuit of remnants ripple electric current of the utility model embodiment.
Specific embodiment
The utility model is described below based on embodiment, but it is worth noting that, the utility model is simultaneously unlimited
In these embodiments.It is detailed to describe some specific detail sections below in the datail description of the utility model.So
And for the part of no detailed description, the utility model can also be understood completely in those skilled in the art.
In addition, it should be understood by one skilled in the art that provided attached drawing is simply to illustrate that the utility model
Objects, features and advantages, attached drawing are not to be actually drawn to scale.
Meanwhile unless the context clearly requires otherwise, "include", "comprise" etc. otherwise throughout the specification and claims
Similar word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being " including but not limited to "
Meaning.
Fig. 1 is a kind of Adaptive Suppression schematic block circuit diagram of remnants ripple electric current of the utility model embodiment.Such as Fig. 1
It is shown, it is a kind of pulsation constant current in remnants ripple electric current Adaptive Suppression circuit, comprising: voltage controlled current source 1；Voltage controlled current source 1,
It is connect with error calculation circuit；Error calculation circuit is connect with current potential sample circuit；Current potential sample circuit is appeared in for acquiring
Load current potential at the ripple voltage trough of (for example, LED light source) cold end；Error calculation circuit is used for current potential at trough
It is compared with reference potential, forms deviation；Voltage controlled current source 1 exports electric current according to bias adjustment.
Further, in Fig. 1, error calculation circuit is also connect with amplifying circuit；Amplifying circuit and voltage controlled current source 1 connect
It connects；Amplifying circuit, for amplifying deviation；Error calculation circuit and amplifying circuit constitute error amplifying circuit 4.
Further, in Fig. 1, also there is smoothed filter circuit 2 between voltage controlled current source 1 and error amplifying circuit 4；It is flat
Sliding filter circuit 2, for carrying out the disposal of gentle filter to amplification deviation.
Further, in Fig. 1, current potential sample circuit is also connect with sample value holding circuit, sample value holding circuit with it is described
Error amplifying circuit 4 connects.
Further, in Fig. 1, current potential sample circuit is also connect with decision circuitry；
Further, in fig. 1, it is decided that circuit, appears in load cold end (such as LED light source cathode) for judging
Ripple voltage trough；Current potential sample circuit, for acquiring the line for appearing in load cold end (such as LED light source cathode)
Current potential at wave voltage trough；Sample value holding circuit, for keeping sampled value in the non-sampled period.
Further, in fig. 1, it is decided that circuit, current potential sample circuit, sample value holding circuit, which constitute current potential sampling, keeps electricity
Road 3.
Further, in Fig. 1, error amplifying circuit 4 is also connect with reference circuit 5；Reference circuit 5, for being error
Amplifying circuit 4 provides reference potential.
Further, in Fig. 1, the Adaptive Suppression circuit of remnants ripple electric current in a kind of pulsation constant current, further includes: steady
Volt circuit 6；Voltage regulator circuit 6, for providing voltage stabilization for the Adaptive Suppression circuit of remnants ripple electric current in pulsation constant current
Internal work power supply.Specifically, regulated power supply 6, gives voltage controlled current source 1, smoothed filter circuit 2, current potential sampling hold circuit
3, error amplifying circuit 4 and reference circuit 5 are powered.
In Fig. 1, a kind of LED light source driving circuit, comprising: remnants ripple electric current is adaptive in a kind of such as above-mentioned pulsation constant current
Answer suppression circuit；And LED light；A kind of Adaptive Suppression circuit of remnants ripple electric current is serially connected in the current loop of LED light,
That is it is disconnected at the label 7 in Fig. 1.
Further, in Fig. 1, a kind of LED light two sides of LED light source driving circuit are simultaneously connected to filter circuit.
Further, in Fig. 1, a kind of LED light of LED light source driving circuit is connect with default constant-current source 10；Default perseverance
Stream source 10 powers for LED light.
Further, in Fig. 1, a kind of LED light of LED light source driving circuit is LED light string 8, and a kind of LED light source drives
The filter circuit of dynamic circuit is filter capacitor 9.Specifically, the acquisition of current potential sampling hold circuit 3 appears in 8 cathode of LED light string
Ripple voltage trough at (i.e. ripple waveform minimum point) current potential.If the current average of the pulsation constant current of LED light string 8 increases,
Then current potential can reduce at collected ripple voltage trough.The utility model is primarily to the electricity for allowing voltage controlled current source 1 to export
Flow the average value of the electric current (i.e. pulsation constant current) of the LED light string 8 before being theoretically constantly equal to and (being actually almost constantly equal to).
Specifically, the connection type of the utility model is briefly described in conjunction with Fig. 1: current potential sampling hold circuit 3
Input terminal be connected with the current input terminal of voltage controlled current source 1 after it is outer draw, and be connected to the cathode of LED light string 8；Current potential sampling is kept
The output termination error amplifying circuit 4(of circuit 3, as error amplifying circuit 4, can specifically be detailed in retouching in Fig. 2 using amplifier
State) non-inverting input terminal+；The inverting input terminal-of the output termination error amplifying circuit 4 of reference circuit 5；Smoothed filter circuit 2
Input termination error amplifying circuit 4 output end, and export termination voltage controlled current source 1 control signal；Voltage controlled current source 1
Current output terminal outside draw, and be connected to the current input terminal of default constant-current source 10；The burning voltage that voltage regulator circuit 6 exports is responsible for void
The electric energy supply of remaining each circuit in wire frame；And draw outside the input terminal of voltage regulator circuit 6, and be connected to 8 anode of LED light string and its filtering
9 anode of capacitor.
In Fig. 1, when certain reason causes the electric current in LED light string 8 increase tendency occur, current potential sampling hold circuit
3 output current potential declines therewith, compared with reference potential after difference through error amplifying circuit 4 amplification, smoothed filter circuit 2 filter
Wave, the constant current value for forming voltage controlled current source 1 become smaller, and then reduce 8 electric current of LED light string, so that the utility model be made to utilize
It is constant that negative-feedback principle maintains 8 electric current of LED light string.When certain reason causes the electric current in LED light string 8 reduction trend occur
When, consequential variation is with the above process on the contrary, also 8 electric current of LED light string will be maintained to be basically unchanged.
In the present invention, above-mentioned closed-loop control as a result, on the one hand ensure that voltage controlled current source 1 and LED light string 8 flow
The electric current crossed numerically is consistently equal to the average value of the default constant current of default constant-current source 10, thus greatly reduces current ripples
Coefficient；On the other hand for a certain range of arbitrarily default constant current (when as being used for sectional dimming LED), LED light is also ensured
Current potential (that is, valley current potential) substantially constant at the trough of 8 cathode is gone here and there, since the actual numerical value of the current potential is smaller and can be by benchmark electricity
Road 5 is set, thus the circuit element of voltage controlled current source 1 can be made to be automatically held in ideal power consumption state always, and not
Inelastic region can be entered.
The remnants ripple voltage at 9 both ends of filter capacitor is the root for leading to occur in LED light string 8 remnants ripple electric current.?
In conventional LED driver (or LED light source driving circuit), LED light string 8 is directly in parallel with filter capacitor 9, therefore the remnants line
Wave voltage can be directly translated into biggish remnants ripple electric current in LED light string 8.
In Fig. 1, according to aforesaid operating principle, can visually it be interpreted as, the utility model is exactly by filtered electrical
Hold the ripple voltage at 9 both ends and arrive the upper and lower ends of voltage controlled current source 1 as fully as possible " transfer ", to inhibit to the maximum extent
The method of 8 both ends ripple voltage of LED light string is correspondingly made available original ripple current in LED light string 8 also as far as possible effectively
" purification ".Stated differently, since the access of the utility model, although 9 both ends of filter capacitor still remain biggish remnants ripple
Voltage, but the voltage at 8 both ends of LED light string " can not sway " always.
In conjunction with Fig. 1, summarize the utility model: current potential sampling hold circuit 3 acquires and keeps LED light string 8
Current potential at the ripple trough of cathode, reference circuit 5 provide reference potential；At 4 calculating benchmark current potential of error amplifying circuit and trough
Difference between current potential, and difference is amplified, flip-flop is taken out using smoothed filter circuit 2, to voltage controlled current source 1
Output electric current controlled, and then keep the electric current substantially constant in LED light string 8 constant, and be constantly equal to default constant-current source 10
The average value of default constant current.
Fig. 2 is the electricity of the Adaptive Suppression circuit of remnants ripple electric current in a kind of pulsation constant current of the utility model embodiment
Road schematic diagram.As shown in Fig. 2, the embodiment as the utility model, in order to which that this is better achieved is practical new by those skilled in the art
Type, what attached drawing 2 provided is that by a kind of modularized circuit schematic diagram of the utility model aim.
In Fig. 2, voltage controlled current source 1, comprising: N-channel VMOS field-effect tube FET, first resistor R1 and the second operation are put
Big device U2.Field-effect tube FET works in linear amplification region.
In Fig. 2, smoothed filter circuit 2, comprising: first capacitor C1, second resistance R2 and 3rd resistor R3.
In Fig. 2, current potential sampling hold circuit 3, comprising: diode D1, the 4th resistance R4 and the second capacitor C2.Wherein:
C2, R4 are sample value holding element；D1 judges as trough and its current potential sampling element.
In Fig. 2, error amplifying circuit 4, comprising: the first operational amplifier (or voltage comparator) U1.
In Fig. 2, reference circuit 5, comprising: the 5th resistance R5, the 6th resistance R6.The tie point (i.e. dividing point) of R5 and R6
Current potential is reference potential.
In Fig. 2, regulated power supply 6, comprising: the 7th resistance R7, third capacitor C3 and zener diode D2；7th resistance R7
For current-limiting resistance.
In Fig. 2, those skilled in the art can keep according to voltage controlled current source 1, smoothed filter circuit 2, current potential sampling in Fig. 2
The connection relationship of circuit 3, error amplifying circuit 4, reference circuit 5 and regulated power supply 6, to remnants ripple electricity in a kind of pulsation constant current
The Adaptive Suppression circuit of stream is attached, and connection type is no longer described in detail herein.
The utility model is controlled by closed loop circuit, is filtered in not increasing (or even can suitably reduce) former LED driver
Under the premise of 9 capacity of capacitor, the current ripples coefficient of LED drive current is reduced to negligible degree (such as≤± 1%),
To make original stroboscopic phenomenon macroscopically be eliminated.Meanwhile for the default " permanent of a certain range of any number
Stream ", the utility model can make the circuit element in work be automatically held in ideal power consumption state always.
The utility model both can be made into module, for the technological improvement of original LED driver, also can be directly used for LED drive
The design of dynamic device regeneration product, it may also be used for it is other be not intended to choose in larger capacity filter capacitor, small power electric it is resistive negative
The design of the ultralow ripple constant-flow driver carried.
2014, the utility model was successfully applied to " development of Daqing oil field North control room Novel illuminating system " item
Mesh.LED light source driver in the project uses attached circuit diagram shown in Fig. 2, and with reasonable component parameters, makes
It surveys current ripples coefficient S=± 0.5%.
Embodiment described above is only to express the embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Therefore it cannot be interpreted as that a limitation on the scope of the patent of the present invention.It should be pointed out that the ordinary skill people of this field
For member, without departing from the concept of the premise utility, several deformations, same replacement can also be made, improved etc., these
Belong to the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of Adaptive Suppression circuit of remnants ripple electric current characterized by comprising
Voltage controlled current source (1)；
The voltage controlled current source (1), connect with error calculation circuit；The error calculation circuit is connect with current potential sample circuit；
The current potential sample circuit, for acquiring the current potential present in the ripple voltage trough of load cold end；
The error calculation circuit forms deviation for comparing current potential at the trough with reference potential；
The voltage controlled current source (1) exports electric current according to the bias adjustment.
2. a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 1, it is characterised in that:
The error calculation circuit is also connect with amplifying circuit；The amplifying circuit is connect with the voltage controlled current source (1)；
The amplifying circuit forms error and amplifies voltage for amplifying the deviation；
The error calculation circuit and the amplifying circuit constitute error amplifying circuit (4).
3. a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 2, it is characterised in that:
Also there are smoothed filter circuit (2) between the voltage controlled current source (1) and the error amplifying circuit (4)；
The smoothed filter circuit (2), for carrying out the disposal of gentle filter to error amplification voltage.
4. a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 2, it is characterised in that:
The current potential sample circuit, also connect with sample value holding circuit, the sample value holding circuit and the error amplifying circuit
(4) it connects；
The sample value holding circuit, for keeping sampled value in the non-sampled period.
5. a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 4, it is characterised in that:
The current potential sample circuit, also connect with decision circuitry；
The decision circuitry, the trough of the ripple voltage for judging to appear in load cold end；
The decision circuitry, the current potential sample circuit and the sample value holding circuit constitute current potential sampling hold circuit (3).
6. a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 5, it is characterised in that:
The error amplifying circuit (4), also connect with reference circuit (5)；
The reference circuit (5), for providing reference potential for the error amplifying circuit (4).
7. any one a kind of Adaptive Suppression circuit of remnants ripple electric current according to claim 1~6, which is characterized in that
Further include:
Voltage regulator circuit (6)；
The voltage regulator circuit (6), for providing voltage stabilization for a kind of Adaptive Suppression circuit of remnants ripple electric current
Internal work power supply.
8. a kind of LED light source driving circuit characterized by comprising
A kind of Adaptive Suppression circuit of remnants ripple electric current as described in any one of claim 1~7；And
LED light (8)；
A kind of Adaptive Suppression circuit of remnants ripple electric current, is serially connected in the current loop of the LED light (8)；
The LED light two sides are simultaneously connected to filter circuit.
9. a kind of LED light source driving circuit according to claim 8, it is characterised in that:
The filter circuit is filter capacitor (9).
10. a kind of LED light source driving circuit according to claim 8, it is characterised in that:
The LED light (8) connect with default constant-current source (10)；
The default constant-current source (10) is switch mode constant current source or high ripple constant-current source；
The default constant-current source (10) is powered for the LED light (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820807401.1U CN208445795U (en) | 2018-05-29 | 2018-05-29 | The Adaptive Suppression circuit and LED light source driving circuit of remnants ripple electric current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820807401.1U CN208445795U (en) | 2018-05-29 | 2018-05-29 | The Adaptive Suppression circuit and LED light source driving circuit of remnants ripple electric current |
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| CN208445795U true CN208445795U (en) | 2019-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112203382A (en) * | 2020-09-30 | 2021-01-08 | 杭州启绿科技有限公司 | Light source driving device and driving method |
| CN112423434A (en) * | 2020-11-13 | 2021-02-26 | 浙江大学 | Power supply ripple based multi-path LED lamp brightness bypass detection device and method |
-
2018
- 2018-05-29 CN CN201820807401.1U patent/CN208445795U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112203382A (en) * | 2020-09-30 | 2021-01-08 | 杭州启绿科技有限公司 | Light source driving device and driving method |
| CN112423434A (en) * | 2020-11-13 | 2021-02-26 | 浙江大学 | Power supply ripple based multi-path LED lamp brightness bypass detection device and method |
| CN112423434B (en) * | 2020-11-13 | 2021-10-08 | 浙江大学 | Power supply ripple based multi-path LED lamp brightness bypass detection device and method |
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