CN101077038A

CN101077038A - Discontinuous AC power ballast for discharge lamp

Info

Publication number: CN101077038A
Application number: CNA2005800426982A
Authority: CN
Inventors: 崔俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-16
Filing date: 2005-12-16
Publication date: 2007-11-21
Also published as: KR20070084611A; WO2006065099A1

Abstract

The present invention relates to a discontinuous AC ballast for a discharge lamp, and more particularly to a discontinuous AC ballast for a discharge lamp of a new concept comprising DC or a rectifier circuit 1 converting AC to DC, a controller circuit 2 generating control signals, and an electric power circuit 3 supplying discontinuous AC to the discharge lamp with control signals generated by the controller circuit, for providing a ballast for a discharge lamp with improved energy efficiency. The ballast according to the present invention supplies discontinuous AC to the discharge lamp and prevents energy loss caused from a transition point of AC (+) and (-) in a conventional ballast for a discharge lamp.

Description

Discontinuous AC power ballast for discharge lamp

Technical field

The present invention relates to the discontinuous AC power ballast of a kind of use on discharge lamp, especially relate in the process that on common discharge lamp, applies electric power, utilization is by converting direct current or alternating current to galvanic rectification circuit, produce the control circuit of discontinuous signal, and discharge lamp is applied the discontinuous AC power ballast that the power circuit of alternating current is formed according to signal that this control circuit produced, at (+) (-) the transfer point place that is applied to the alternating current on the discharge lamp, by fix time providing of power supply temporarily be provided, thereby prevent a kind of discontinuous AC power ballast for discharge lamp of unnecessary power loss.

Background technology

Usually, for life-span of prolonging discharge lamps such as apparent light modulation, mercury vapor lamp, neon glim lamp and keep its continuous luminance and laid stabilizer, and apply alternating current, these discharge lamps promptly can be luminous after connecting alternating currents.

Fig. 4 is the continuous alternating current of discharge lamp in the expression prior art and the concept map of plasma motion; Fig. 5 is the oscillogram of the continuous alternating current of discharge lamp in the expression prior art, at first, the electronics of the discharge lamp internal plasma after the continuous alternating current that use for discharge lamp stabilizer of the prior art once provides being described and being applied in this alternating current with reference to Fig. 4 and the movement relation between the cation.

As (a) stage among the figure, after applying (+) (-) electric power on the two end electrodes of discharge lamp (lamp) (4), since effect of electric field, electronics

Can anode (+) direction do accelerated motion, and cation

Can do accelerated motion to negative electrode (-) direction.

, continue as (b) stage among the figure thereafter, on the two end electrodes of discharge lamp with after applying (+) (-) electric power with (a) stage rightabout, owing to rightabout effect of electric field of (a) stage, electronics

Can do accelerated motion towards being converted to rightabout anode (+) direction, and cation

Also can do accelerated motion to being converted to rightabout negative electrode (-) direction.

Alternating current is applied to continuously like this on the discharge lamp (4) the result as shown in Figure 5, power loss zone (11) can appear in the initial point place that changes at electric field.

That is, this power loss zone (11) is meant owing to be applied to the direction of power anode (+) and negative electrode (-) on the discharge lamp (4) and change, makes toward the electronics of a direction accelerated motion

Or cation

Its direction of motion is toward the interval of rightabout transformation.

Yet, in described power loss zone (11) when consuming discharge lamp lighting the required electric power, also can the additive decrementation electronics

And cation

The direction of motion required electric power when changing, and, in order to make the electronics that turns

Possess required energy when luminous and quicken its motion, also need to provide to surpass the electric power that changes the energy that the place consumes at electric field, thereby in fact can produce a lot of power losss.

As mentioned above, be applied in the stabilizer of continuous alternating current in the prior art, can be to discharge lamp not luminous all electricity usages that provide, and when electric field changes, can lose a large amount of electric power, therefore consume unnecessary electric power and caused problems such as low efficiency.

In view of this, in order to address the above problem, the invention provides a kind of control circuit of applying of discontinuous alternating current being controlled by layout in circuit, thereby can prevent the discontinuous AC ballast of use for discharge lamp of the power loss that electric field is taken place when changing.

Summary of the invention

A kind of discontinuous AC power ballast for discharge lamp provided by the invention, it is by converting direct current or alternating current to galvanic rectification circuit, produce the control circuit of discontinuous signal and according to the signal that this control circuit produced the power circuit that discharge lamp applies alternating current is formed, and provides when electric field changes termination to apply the time-out interval of electric power by this stabilizer.

The invention effect

Compared with prior art, discontinuous AC ballast provided by the invention can save 30-50% when electric field changes in order to change electronics and cationic acceleration direction the electric power of loss, thereby improved energy efficiency, and stoped in electric field transformation place and supplied with the heating phenomenon that causes owing to unnecessary electric power, thereby avoid the generating electrodes damage, can prolong the useful life of discharge lamp.

Description of drawings

Fig. 1 is the discontinuous alternating current of expression stabilizer provided by the invention and the concept map of plasma motion.

Fig. 2 is a module map of representing that briefly stabilizer circuit provided by the invention is formed.

Fig. 3 is the circuit diagram of the stabilizer that provides of the embodiment of the invention.

Fig. 4 is the continuous alternating current of expression discharge lamp of the prior art and the concept map of plasma motion.

Fig. 5 is the oscillogram of the continuous alternating current of discharge lamp of the prior art.

Embodiment

Below, specify most preferred embodiment of the present invention with reference to accompanying drawing.

Fig. 1 is the discontinuous alternating current of stabilizer provided by the invention and the concept map of plasma motion, below describes the electronics and the cationic movement relation of the plasma of discontinuous alternating current that stabilizer provided in the embodiment of the invention and discharge lamp inside in detail with reference to this figure.

As shown in Figure 1, after applying (+) (-) electric power on the two end electrodes of discharge lamp (4), since effect of electric field, electronics

Meeting anode (+) direction is done and is quickened to move, and cation

Can do to negative electrode (-) direction and quicken to move, this discharge lamp (4) is lit a lamp when moving towards decided direction with this electronics and cation.

Thereafter, before applying (+) (-) electric power on the two end electrodes of discharge lamp (4) on the contrary, shown in (d) stage among the figure, if on the two end electrodes of discharge lamp (4), do not apply electric power, will make (c) in the stage because electric field action and to the electronics of single direction accelerated motion

And cation (-) is in the electric field disarm state, thereby these electronics and cation can do free movement and collide mutually, causes the single direction that has separately destroyed and lose self energy gradually.

At this moment, as (e) stage, after applying (+) (-) electric power with the direction opposite on the two end electrodes of discharge lamp (4) with (c) stage, since the effect of electric field that forms with (c) stage rightabout, electronics

Can do to anode (+) direction that the direction opposite with (c) stage changes and quicken to move, and cation Also can do to negative electrode (-) direction that the direction opposite with (c) stage changes and quicken to move, this discharge lamp (4) was lit a lamp when cation was all done accelerated motion with the direction opposite with (c) stage with anion as a result.

Under this state, as shown in (f) stage among the figure, on the two end electrodes of discharge lamp (4), do not apply electric power once more, will make (e) in the stage because electric field action and to the electronics of single direction accelerated motion

And cation (-) is in the electric field disarm state, thus these electronics and cation do free movement and collide mutually, cause the directivity that has separately destroyed and lose self energy gradually.

As a result, can avoid loss near (+) (-) power direction transition point of the alternating current that transformation place of electric field promptly is being applied in, to take place, those electronics that will quicken by certain orientation

And cation

To conversion of other directions and required electric power when mobile, thereby can prevent power wastage, improve luminous required energy efficiency.

At this moment, preferred, do not apply (d) stage of electric power and (f) duration in stage is less than the electronics in discharge lamp (4) internal plasma

Energy maintains and surpasses the time during institute's energy requirement luminous time.

That is, has enough energy and luminous electronics by electric field action

Together lose directivity and cause successively decreasing of energy with the direction transformation of electric field, not luminous in certain some beginning that energy reduces.

Secondly, preferred, the power suspend time set that applies that does not apply electric power is being shorter than the electric field transition point to electronics

Not in the scope of the time till the luminous point, thereby can under the situation that applies alternating current discontinuously, also can keep the state of lighting a lamp of discharge lamp (4), form and to have nothing in common with each other according to being present in discharge lamp (4) gas inside and apply the power suspend time, can obtain the optimal time period by the experiment repeatedly that various compositions are carried out.

Fig. 2 is a module map of representing that roughly stabilizer circuit provided by the invention is formed, as shown in the figure, this circuit comprises and converts alternating current commonly used (10) to galvanic rectification circuit (1), the electric power that this rectification circuit (1) is applied produces the control circuit (2) of control signal, the signal that sends according to this control circuit (2) produces the power circuit (3) of discontinuous alternating current, and be applied in from the discontinuous alternating current of this power circuit (3) and luminous discharge lamp (4), at this moment, if directly provide DC power supply to described control circuit (2) and power circuit (3), just can omit described rectification circuit (1).

Based on such technical scheme thought, can more specifically design the circuit that the present invention relates to as the embodiment of Fig. 3 and form.

Fig. 3 is the circuit diagram of the stabilizer that relates to of the embodiment of the invention, and this figure just provides the circuit diagram of a kind of embodiment of discontinuous alternating current for electric field transformation place at discharge lamp (4) does not apply electric power, and the present invention is not limited thereto.

With reference to Fig. 3, the circuit in the present embodiment comprises: alternating current (10) is converted to required direct current and provides the rectification circuit (1) of discontinuous alternating current, the control circuit (2) that produces control signal and the power circuit (3) that converts discontinuous alternating current to and this discontinuous alternating current is applied to discharge lamp (4) with this to discharge lamp (4).

Described rectification circuit (1) is the circuit common of using when alternating current commonly used (A.C.) is converted to direct current (D.C.), it is provided necessary driving voltage (VCC2) can stably for described control circuit (2) and can necessary driving voltage (VCC1) is provided stably for described power circuit (3), can save rectification circuit (1) when certainly, providing direct current as mentioned above.

The control circuit (2) of the electric power that provides has been provided from described rectification circuit (1), can produce and be used for the control signal of electric power that control offers discharge lamp (4), and control FET1, FET2, FET3 and FET4 and capacitor (C7) in the power circuit (3) with this.

More particularly, oscillator (5) sends high-frequency signal and provides it to shift register (7), and the shift register (7) that receives high-frequency signal from oscillator (5) will be provided to discontinuous signal in the driver (8), (9) of branch successively.

And two side driver (8), (9) that received signal from shift register (7) are provided in the power circuit (3) making field-effect transistor (Field-Effect Transistor) FET1 and FET4 and FET2 and FET3 become one group and the control signal of carrying out the ON/OFF operation respectively.

On the one hand, be attached to after timer (6) in the described control circuit (2) provides the high voltage that needs when lighting a lamp for discharge lamp (4), process institute fixes time and just can control signal be provided in the power circuit (3) again, and this control signal is provided in the discharge lamp (4) normal voltage.

Like this, from described control circuit (2), receive control signal, and from described rectification circuit (1) power circuit (3) of reception driving voltage (VCC1), can discharge lamp (4) when lighting a lamp required discontinuous alternating current be supplied to discharge lamp (4).

That is, FET1, the FET2 of received signal, driving DC voltage (VCC1) that FET3, FET4 provide rectification circuit (1) convert discontinuous alternating current to and are fed in the discharge lamp (4) from the driver (8) of control circuit (2), (9).

Yet, voltage during generally owing to discharge lamp lighting is higher than the voltage of keeping the state of lighting a lamp, thereby the initial stage of lighting a lamp to utilize transformer (T1) and capacitor (C7) high voltage required when lighting a lamp to be provided for discharge lamp (4), make this discharge lamp (4) carry out the ON operation with this, the signal that sends according to control circuit (2) immediately carries out the OFF operation of capacitor (C7) afterwards, and is supplied to discharge lamp (4) keeping the required voltage of lighting a lamp.

Utilizability on the industry

As described above, according to discontinuous AC ballast provided by the invention, can save 30-50%'s When electric field changes in order to change electronics and cationic acceleration direction the electric power of loss, thereby improved energy Amount efficiency, and, also stoped in electric field transformation place and supplied with the heat generation that causes owing to unnecessary electric power Phenomenon, and then avoid the generating electrodes damage, can prolong the service life of discharge lamp.

Claims

1. discontinuous AC power ballast for discharge lamp is characterized in that comprising:

Be applied in direct current, produce the control circuit (2) of discontinuous signal;

According to the signal that described control circuit (2) produces, the described direct current that is applied in is converted to the power circuit (3) of discontinuous alternating current: and

The discharge lamp (4) of being lit a lamp by the discontinuous alternating current that has applied described power circuit (3).

2. discontinuous AC power ballast for discharge lamp as claimed in claim 1 is characterized in that: the direct current that is applied in the described control circuit (2) is converted into alternating current by rectification circuit (1).

3. discontinuous AC power ballast for discharge lamp as claimed in claim 1 or 2 is characterized in that: the power suspend point that applies of discontinuous alternating current is to be applied to (+), the direction transfer point of (-) utmost point on the described discharge lamp (4).

4. discontinuous AC power ballast for discharge lamp as claimed in claim 3 is characterized in that: describedly apply the power suspend time, be less than the electronics in described discharge lamp (4) internal plasma

5. discontinuous AC power ballast for discharge lamp as claimed in claim 1 or 2 is characterized in that: described control circuit (2) comprises driver (8), (9) of a pair of branch; Described power circuit (3) comprises field-effect transistor FET1-FET4; Wherein said a pair of driver (8), (9) provide and make FET1 and FET4 and FET2 and FET3 become one group and the control signal of carrying out the ON/OFF operation respectively.

6. discontinuous AC power ballast for discharge lamp as claimed in claim 1 or 2, it is characterized in that: described control circuit (2) comprises timer (6): described power circuit (3) comprises transformer (T1) and capacitor (C7), wherein said timer (6) time utilizes described transformer T1 in the beginning of lighting a lamp) and capacitor (C7) provide high voltage to make this discharge lamp (4) carry out the ON operation to discharge lamp (4), come the control time by the OFF operation of carrying out capacitor (C7) afterwards, make to provide to light a lamp and keep voltage to this discharge lamp (4).