CN1039471C - Continuous adjustable linear coil circuit device - Google Patents
Continuous adjustable linear coil circuit device Download PDFInfo
- Publication number
- CN1039471C CN1039471C CN94105692A CN94105692A CN1039471C CN 1039471 C CN1039471 C CN 1039471C CN 94105692 A CN94105692 A CN 94105692A CN 94105692 A CN94105692 A CN 94105692A CN 1039471 C CN1039471 C CN 1039471C
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- coil
- pulse
- width modulation
- winding
- linearity
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Abstract
The present invention relates to a continuous adjustable circuit device for a linear coil, which is mainly composed of a pulse width modulation circuit, a transformer and a linear coil. The current of the coil of the transformer is controlled by pulse waves with different width, and the pulse waves are generated by the frequency change of the horizontal deflection of the pulse width modulation circuit. Therefore, horizontal linearity of a computer monitor has ideal linearity under different frequency. Moreover, horizontal linear distortion of the computer monitor can be avoided.
Description
The present invention relates to a kind of continuous adjustable linear coil circuit device, relate in particular to coil current, to prevent the circuit structure of water horizontal line along with linear distortion that horizontal frequency is produced with pulse-width modulation circuit control saturable transformer.
At present, general large scale computer monitor, because the scope that its horizontal frequency is contained is very big, make wherein by factors such as resistance components that deflecting coil, output transistor, damper diode etc. caused and picture tube structures, cause the horizontal linearity distortion easily, therefore, traditional correcting mode, mostly with relay or organize coil as switching (seeing also Fig. 1), to prevent the distortion of water horizontal line more.But these modes also can't effectively reach desirable linearity, so that when the time in the identical vertical signal in interval, change down in different horizontal frequency, monitor picture presented and non-isometric lines, and also there is the too high and shortcoming such as take up space very much of cost in these switching modes.
The object of the present invention is to provide a kind of continuous adjustable linear coil circuit device, make the horizontal linearity of monitor under different frequencies, all can reach ideal linearity, to replace traditional coil switching mode.
According to continuous adjustable linear coil circuit device of the present invention, it comprises:
The linearity coil that is connected in series with the deflecting coil of computer monitor,
Pulse-width modulation circuit, it comprises a timing integrated circuit and a transistor, wherein, timing integrated circuit, by the coupling connection of resistance, electric capacity, and a variable resistor adjustment, when input is imported different magnitude of voltage, its output produces different in width impulse wave, and promotes a transistor via the connection of a resistance and export a pulse current, and
Saturable transformer, comprise elementary winding and secondary winding, described saturable transformer is coupled between described pulse-width modulation circuit and the described linearity coil, and in response to the impulse wave of the different in width of described pulse-width modulation circuit output, the level winding forms the inductance value of current change with the described linearity coil of relative change secondarily.
Combination by above-mentioned member, the different in width impulse wave that pulse-width modulation circuit is exported, make the secondary winding of saturable transformer form current change, and change the linearity coil inductance value relatively, reach continuously adjustable linearity coil switching effect automatically thereby reach.
Main feature of the present invention and advantage thereof, it is clear more to become in the detailed description of doing below in conjunction with drawings and Examples.
Fig. 1 is the coil switching mode schematic diagram of using always.
Fig. 2 is a circuit diagram of the present invention.
Fig. 3 is a saturable transformer coil distribution schematic diagram of the present invention.
Please consult Fig. 2 and Fig. 3 simultaneously, the present invention is mainly by pulse-width modulation circuit 1, saturable transformer 2 and linearity coil 3 are formed, wherein, pulse-width modulation circuit is the monostable oscillator that a timing integrated circuit (for example using 555 time-base circuits) IC1 and peripheral related elements are formed, when input is imported different magnitude of voltage, the resistance R 1 that it connected, R2, R3, capacitor C 1 will make integrated circuit (IC) 1 produce the impulse wave of different in width, and suitably finely tune by variable resistor VR1, the resistance R 4 that formed impulse wave is connected through integrated circuit (IC) 1 output, and promote a transistor Q1, the latter exports pulse current to the elementary winding L 1 of saturable transformer T1, this saturable transformer T1 is wound the line by-IE is unshakable in one's determination, its elementary winding L 1 has the high number of turns, secondary winding L2 then is the number of turns (as shown in Figure 3) of minority symmetry winding mode, therefore, when elementary winding L 1 flows through few electric current, promptly form saturated conditions, and when electric current increases, therefore the inductance value of secondary burning group L2 reduces, the magnitude of current that flows through secondary winding L2 is improved, change the inductance value of the linearity coil that is coupled relatively, make it revise linear distortion, make and when different horizontal frequencies, reach desirable linearity, and this circuit arrangement cooperates via automatic adjustment system, can form feedback control, that is when each different frequency, desirable linearity coil is all arranged, reach continuous adjustable linearity coil switching effect automatically and can reach.
In sum, the present invention is with a pulse-width modulation circuit, and by the impulse wave of different in width, and the inductance value of change linearity coil makes the horizontal frequency of computer monitor reach ideal linearity, to improve the shortcoming of switching coil commonly used, is the design of a practicality.
Claims (2)
1. continuous adjustable linear coil circuit device comprises the linearity coil that the deflecting coil with computer monitor is connected in series, and it is characterized in that further comprising:
Pulse-width modulation circuit, it comprises a timing integrated circuit and a transistor, wherein, timing integrated circuit, by the coupling connection of resistance, electric capacity, and a variable resistor adjustment, when input is imported different magnitude of voltage, its output produces different in width impulse wave, and promotes a transistor via the connection of a resistance and export a pulse current, and
Saturable transformer, comprise elementary winding and secondary winding, described saturable transformer is coupled between described pulse-width modulation circuit and the described linearity coil, and in response to the impulse wave of the different in width of described pulse-width modulation circuit output, the level winding forms the inductance value of current change with the described linearity coil of relative change secondarily.
2. continuous adjustable linear coil circuit device as claimed in claim 1 is characterized in that the elementary winding of described saturable transformer has the high number of turns, and described secondary winding has the number of turns that minority adopts symmetrical winding mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105692A CN1039471C (en) | 1994-05-12 | 1994-05-12 | Continuous adjustable linear coil circuit device |
| US08/621,095 US5742152A (en) | 1994-05-12 | 1996-03-22 | Continuously rectifiable linearity coil circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105692A CN1039471C (en) | 1994-05-12 | 1994-05-12 | Continuous adjustable linear coil circuit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120280A CN1120280A (en) | 1996-04-10 |
| CN1039471C true CN1039471C (en) | 1998-08-05 |
Family
ID=5032148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94105692A Expired - Fee Related CN1039471C (en) | 1994-05-12 | 1994-05-12 | Continuous adjustable linear coil circuit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039471C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085715A (en) * | 1992-09-04 | 1994-04-20 | 汤姆森消费电子有限公司 | Horizontal deflection waveform correction circuit |
-
1994
- 1994-05-12 CN CN94105692A patent/CN1039471C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085715A (en) * | 1992-09-04 | 1994-04-20 | 汤姆森消费电子有限公司 | Horizontal deflection waveform correction circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1120280A (en) | 1996-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |