CN2429978Y - TV image declination calibrating circuits - Google Patents
TV image declination calibrating circuits Download PDFInfo
- Publication number
- CN2429978Y CN2429978Y CN 00217655 CN00217655U CN2429978Y CN 2429978 Y CN2429978 Y CN 2429978Y CN 00217655 CN00217655 CN 00217655 CN 00217655 U CN00217655 U CN 00217655U CN 2429978 Y CN2429978 Y CN 2429978Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- correcting coil
- image
- correcting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Details Of Television Scanning (AREA)
Abstract
The utility model relates to a TV image declination calibrating circuit which comprises a correcting coil which is arranged on the tail part of a cone body of a kinescope. The utility model is characterized in that the input end of the correcting coil is connected with a voltage regulating circuit and a current regulating circuit or the input end and the output end of the correcting coil are respectively and symmetrically connected with the voltage regulating circuit and the current regulating circuit. The utility model has the advantages of simple structure, low cost and good image correcting effect.
Description
The utility model relates to a kind of television image slant correction circuit.
After the color television set energising of horizontal positioned, electron beam vertical component in the picture tube has been cut the horizontal component in magnetic field of the earth, electron beam has produced rotation, the base area signal magnetic field distributes as can be known, television set is towards east or the minimum that is affected when western, and the television set maximum that is affected when to the south or northern is when TV is towards south on the Northern Hemisphere, the image right rotation, screen picture shows and is as shown in Figure 1; When television set during towards north, image anticlockwise, screen picture shows and is as shown in Figure 2.Among Fig. 1, Fig. 21 is television screen, the 2nd, and the image of deflection.Along with the television screen size constantly increases, when watching the wide screen program, the visual effect of image inclination is especially outstanding.
Many in recent years producers are to add a loop coil bigger than deflecting coil diameter on the picture tube cone in the method that large-screen receiver has designed the inclination of image inclination correcting circuit correcting image, in coil, fail to be convened for lack of a quorum and produce magnetic field by constant DC, as long as this magnetic field is opposite with the geomagnetic field horizontal component direction, amplitude equates, electron beam does not influence and can not rotate in the picture tube, image just can not tilt, reached the correction purpose, electric current will " just ", " bear " adjusting in the coil, and the amplitude adjusting range is about 0AT～25AT.
At present, abroad some producers have developed the IC integrated circuit, contain DC interface, and the remote-controlled correcting image of user tilts, but price expensive partially (for example TDA7072A product, price is about about 0.35 dollar).
The purpose of this utility model is exactly the problem that has correcting image inclination aspect now in order to overcome, and the television image slant correction circuit that a kind of circuit structure is simple, production cost is low, correcting image is effective that proposes.
The purpose of this utility model is achieved in that
Television image slant correction circuit comprises a correcting coil that is located at picture tube cone afterbody, and the supply voltage value at these correcting coil two ends does not wait, and is characterized in, connects a voltage-regulating circuit and a matrix current adjustment circuit at the input of correcting coil.
Television image slant correction circuit, comprise a correcting coil that is located at picture tube cone afterbody, the supply voltage value at these correcting coil two ends equates, is characterized in, is connected a voltage-regulating circuit and a matrix current adjustment circuit respectively at the input and the output of correcting coil.
Above-mentioned television image slant correction circuit, wherein, described voltage-regulating circuit is a potentiometer, its voltage adjustment end is connected with the input of matrix current adjustment circuit.
Above-mentioned television image slant correction circuit, wherein, described voltage-regulating circuit is a phase inverter, reaches the resistance that connects at its collector electrode by a triode and constitutes, its voltage adjustment end is connected with the input of matrix current adjustment circuit.
Above-mentioned television image slant correction circuit, wherein, described matrix current adjustment circuit is made of a PNP triode and the parallel connection of a NPN triode; Be connected with an end of correcting coil after the emitter parallel connection of these two triodes; Be connected with the voltage adjustment end of voltage-regulating circuit after the base stage parallel connection of these two triodes.
Because the utility model has adopted above structure, forms correcting circuit by triode and correcting coil spare, therefore, circuit structure is simple, and cost is low, only for about 30% of import IC circuit, is convenient to promote the use of.
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is that television image is subjected to the magnetic field of the earth to influence the schematic diagram that image right avertence is changeed;
Fig. 2 is that television image is subjected to the magnetic field of the earth to influence the schematic diagram that the image left avertence is changeed;
Fig. 3 is the electrical block diagram of one of the utility model embodiment;
Fig. 4 is two the electrical block diagram of the utility model embodiment;
Fig. 5 is three the electrical block diagram of the utility model embodiment;
Fig. 6 is four the electrical block diagram of the utility model embodiment.
See also Fig. 3, this is the electrical block diagram of one of the utility model embodiment, is used for the occasion of manual adjustment correcting image.The utility model television image slant correction circuit comprises that is located at a picture tube cone afterbody correcting coil L, and the supply voltage value at these correcting coil two ends does not wait, and its input terminal voltage is that 16V, output end voltage are 8V.Input at correcting coil connects a voltage-regulating circuit and a matrix current adjustment circuit.Described voltage-regulating circuit is a potentiometer R.Described matrix current adjustment circuit is made of a PNP triode BG2 and NPN triode BG1 parallel connection, is connected with an end of correcting coil after the emitter parallel connection of these two triodes; Be connected with the voltage adjustment end of voltage-regulating circuit after the base stage parallel connection of these two triodes.
As shown in Figure 3, potentiometer R two ends potential difference is 16V, makes V when adjusting potentiometer R
0During point voltage=7.4V, BG1 is by, BG2 conducting, solid line directional current I among the last generation of L Fig. 3
1Along with potentiometer is adjusted again, V
0Voltage is during less than 7.4V, I
1Electric current increases, and works as V
IbDuring=0V, I
1Reach maximum.Same principle makes V when adjusting potentiometer
0BG2 ends during=8.7V, BG1 conducting, I among the last generation of L Fig. 3
2Electric current shown in the dotted line, direction and I
1On the contrary, along with V
0The voltage rise height that powers on, I
2Big more.At V
0Point voltage is that the electric current on the L is 0 in 7.4～8.6 scopes.
The principle of the utility model correcting TV image is: television set is placed on to be put on the object, because the influence in magnetic field of the earth, it may export the image of inclination.Use the utility model, adjust the voltage adjustment of potentiometer and hold suitable position, can in correcting coil L, produce and electromagnetic field horizontal component equal and opposite in direction, magnetic field for correcting that direction is opposite, make the image that television set all can obtain level in any direction, not tilt.
For example, on the Northern Hemisphere, when television set was placed southwards, image was to right rotation.
When the voltage adjustment end (middle-end) of the potentiometer among Fig. 3 is adjusted voltage location at 7.4V～8.7V, among BG1 and the BG2 all no current pass through, also no current among the correcting coil L, image can not get correction.
When the voltage adjustment end (middle-end) of the utility model potentiometer when moving down, the left-hand electric current I is flow through in the BG2 conducting among the correcting coil L
1, electric current produces magnetic field in the correcting coil, makes image to anticlockwise, and image obtains proofreading and correct.
For example, on the Northern Hemisphere, when television set was placed southwards, image was to anticlockwise.When the voltage adjustment end (middle-end) of the utility model potentiometer when moving up, the dextrad electric current I is flow through in the BG1 conducting among the correcting coil L
2, electric current generation magnetic field makes image to right rotation in the correcting coil, and image obtains proofreading and correct.
The principle of correcting image is all same as described above in following examples, so no longer repeat.
See also Fig. 4, this is two the electrical block diagram of the utility model embodiment.The utility model television image slant correction circuit is used for the occasion of manual adjustment correcting image.Comprise a correcting coil L who is located at picture tube cone afterbody, the supply voltage value at this correcting coil L two ends equates, the identical 12V that is with output end voltage of its input terminal voltage.Input at correcting coil L connects a voltage-regulating circuit and a matrix current adjustment circuit, connects a voltage-regulating circuit and a matrix current adjustment circuit in the same symmetry of the output of this correcting coil L.Described voltage-regulating circuit is a potentiometer.Described matrix current adjustment circuit is made of a PNP triode and the parallel connection of a NPN triode; Be connected with an end of correcting coil after the emitter parallel connection of these two triodes; Be connected with the voltage adjustment end of voltage-regulating circuit after the base stage parallel connection of these two triodes.In the present embodiment, matrix current adjustment circuit is made of two that are connected correcting coil L input opposite polarity triode BG1, BG2 and two opposite polarity triode BG3, BG4 being connected correcting coil L output respectively, and voltage-regulating circuit is respectively by potentiometer R
1A and potentiometer R
1B constitutes.The emitter of triode BG1, BG2 is connected with the input of correcting coil L after linking to each other, continuous back of the base stage of triode BG1, BG2 and potentiometer R
1Voltage adjustment end connect, the collector electrode of triode BG1, BG2 is connected to potentiometer R
1The two ends of a.Equally, the emitter of triode BG3, BG4 is connected with the output of correcting coil L after linking to each other, and the base stage of triode BG3, BG4 is connected with the voltage adjustment end of potentiometer R after linking to each other, and the collector electrode of triode BG3, BG4 is connected to potentiometer R
1The two ends of b.
R
1A, R
1B is coaxial doubly-linked potentiometer, works as R
1When a moves up, R
1B moves down.When adjusting potentiometer R
1A makes V
01During=0～5.4V, V
02=2～6.7V, BG
2, the BG3 conducting, on coil, produce solid line directional current I
1, adjusting potentiometer R
1Make V
01=6.7～12V, V
02During=5.4～0V, BG
1, the BG4 conducting, coil produces dotted line directional current I
2
As potentiometer R
1When the V01 of the voltage adjustment end of a and V02 voltage were 5V～6.7V, the L electric current equalled zero on the coil, works as V
01Or V
02When the voltage trend is zero, I
1Or I
2Trend is maximum.
Fig. 5 is three the electrical block diagram of the utility model embodiment; The utility model television image slant correction circuit is used for adjusting automatically by remote controller the occasion of correcting TV image.The utility model television image slant correction circuit comprises a correcting coil L who is located at picture tube cone afterbody, and the supply voltage value at these correcting coil two ends does not wait, and its input terminal voltage is that 16V, output end voltage are 8V.Input at correcting coil connects a voltage-regulating circuit and a matrix current adjustment circuit.Described voltage-regulating circuit is a phase inverter, constitutes by a triode BG5 and at resistance R 4, R5 and the filter capacitor C of its collector electrode connection.Described matrix current adjustment circuit is made of a PNP triode BG2 and NPN triode BG1 parallel connection; Be connected with the input of correcting coil L after the emitter parallel connection of these two triodes; Be connected with the voltage adjustment end of voltage-regulating circuit after the base stage parallel connection of these two triodes, this voltage adjustment end is exactly the collector output of phase inverter triode BG5.
The square pulse of being sent here by cpu circuit in the television set (5V change width) is through the BG5 phase inverter, and in the square pulse that the E point has produced the 16V change width, this pulse forms 0～16 direct voltage V through capacitor C filtering
0=0～16V, the dotted line left side can equivalence become potentiometer R adjustment among Fig. 3 among the figure, according to Fig. 3 principle as can be known, produces direction-agile on the correcting coil, and the electric current of variable-magnitude reaches the correction purpose.
Fig. 6 is four the electrical block diagram of the utility model embodiment.Television image slant correction circuit is used for adjusting automatically by remote controller the occasion of correcting TV image.The utility model television image slant correction circuit comprises a correcting coil L who is located at picture tube cone afterbody, and the supply voltage value at these correcting coil two ends equates that its input terminal voltage and output end voltage are 16V.Input and a symmetrical respectively voltage-regulating circuit and the matrix current adjustment circuit of being connected of output at correcting coil.Described voltage-regulating circuit is a phase inverter, reaches the resistance that connects at its collector electrode by a triode and constitutes.Described matrix current adjustment circuit is made of a PNP triode and the parallel connection of a NPN triode; In the present embodiment, matrix current adjustment circuit is made of two that are connected correcting coil L input opposite polarity triode BG1, BG2 and two opposite polarity triode BG3, BG4 being connected correcting coil L output respectively, and voltage-regulating circuit is made of phase inverter BG5 and phase inverter BG6 respectively.The emitter of triode BG1, BG2 is connected with the input of correcting coil L after linking to each other, the base stage of triode BG1, BG2 is connected with the voltage adjustment end (being collector output) of phase inverter BG5 after linking to each other, and the collector electrode of triode BG1, BG2 is connected to the 16V both ends of power.Equally, the emitter of triode BG3, BG4 is connected with the output of correcting coil L after linking to each other, the base stage of triode BG3, BG4 is connected with the voltage adjustment end (being collector output) of phase inverter BG6 after linking to each other, and the collector electrode of triode BG3, BG4 is connected to the two ends of 16V power supply.
Send the square pulse of 5V variable-width here by cpu circuit in the television set,, obtain the square pulse of 16V change width on BG5 collector electrode and the BG6 base stage, also obtain the square pulse of the change width of 16V on the phase inverter BG6 collector electrode through the BG5 paraphase.The square pulse of 16V change width produces 0～16V direct voltage through capacitor C1 filtering on the V01 point.The square pulse of 16V change width produces 16～0 direct currents through capacitor C2 filtering and specially presses on the V02 point.These 2 DC voltage change are opposite each other, with reference to Fig. 4 circuit working principle as can be known, produce the electric current of direction variation and changes in amplitude at correcting coil.
Claims (5)
1, television image slant correction circuit comprises a correcting coil that is located at picture tube cone afterbody, and the supply voltage value at these correcting coil two ends does not wait, and it is characterized in that, connects a voltage-regulating circuit and a matrix current adjustment circuit at the input of correcting coil.
2, television image slant correction circuit, comprise a correcting coil that is located at picture tube cone afterbody, the supply voltage value at these correcting coil two ends equates, it is characterized in that, at a symmetrical voltage-regulating circuit and the matrix current adjustment circuit of being connected of the input and the output of correcting coil.
3, television image slant correction circuit according to claim 1 and 2 is characterized in that, described voltage-regulating circuit is a potentiometer, and its voltage adjustment end is connected with the input of matrix current adjustment circuit.
4, television image slant correction circuit according to claim 1 and 2, it is characterized in that, described voltage-regulating circuit is a phase inverter, reaches the resistance that connects at its collector electrode by a triode and constitutes, and its voltage adjustment end is connected with the input of matrix current adjustment circuit.
5, television image slant correction circuit according to claim 1 and 2 is characterized in that, described matrix current adjustment circuit is made of a PNP triode and the parallel connection of a NPN triode; Be connected with an end of correcting coil after the emitter parallel connection of these two triodes; Be connected with the voltage adjustment end of voltage-regulating circuit after the base stage parallel connection of these two triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217655 CN2429978Y (en) | 2000-05-18 | 2000-05-18 | TV image declination calibrating circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217655 CN2429978Y (en) | 2000-05-18 | 2000-05-18 | TV image declination calibrating circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2429978Y true CN2429978Y (en) | 2001-05-09 |
Family
ID=33583177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00217655 Expired - Fee Related CN2429978Y (en) | 2000-05-18 | 2000-05-18 | TV image declination calibrating circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2429978Y (en) |
-
2000
- 2000-05-18 CN CN 00217655 patent/CN2429978Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1218558C (en) | Image distortion correcting device | |
| CN2429978Y (en) | TV image declination calibrating circuits | |
| CN1049245A (en) | The deflecting coil that is used for color cathode ray tube | |
| CN1085720A (en) | Has the vertical deflection apparatus that S proofreaies and correct | |
| CN1172519C (en) | Display device | |
| CN1076922C (en) | Inner raster distortion correction circuit | |
| CN1027409C (en) | Focusing unit | |
| CN2938627Y (en) | TV. set with geomagnetic correcting circuit | |
| CN1268138C (en) | Vertical deflection circuit and colour display tube | |
| CN1191707C (en) | Electronic beam focus voltage circuit | |
| CN2831641Y (en) | TV set with geomagnetic correcting circuit | |
| CN2638356Y (en) | Image level geometric distortion correcting circuit used for CRT colour television | |
| CN1264334C (en) | Image horizontal geometric distortion correction method and circuit for CRT colour television receiver | |
| CN201247576Y (en) | Drive circuit for flat black and white display | |
| CN1046832C (en) | Picture height adjustment arrangement for a video display | |
| CN2476858Y (en) | Display for navigation radar | |
| CN2340133Y (en) | Geomagnetism compensating device for colour television set | |
| CN1874414A (en) | Circuit for rectifying inner pincushion in ultrathin TV set in CRT | |
| CN1208944C (en) | Vertical ramp generating circuit | |
| CN1274940A (en) | Colour picture tube device | |
| CN1241333A (en) | High voltage system | |
| CN1170226A (en) | Front/back porch voltage-regulator of vertical focus control signal | |
| CN1284385C (en) | Capaicitance video beam sampling and control circuit | |
| CN2691194Y (en) | Dynamic focusing circuit saitable for multiple display modes | |
| CN1534715A (en) | Deflecting coil device and display device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| FG1K | Grant of utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDIAN DIGITAL AUDIO-VISUL ELECTRONIC CO. LTD., Free format text: FORMER NAME OR ADDRESS: SHANGHAI GUANGDIAN JINXING ELECTRONIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Guangdian Digital Audio & Video Electronic Co., Ltd., Shanghai Patentee before: Jinxing Electronics Co., Ltd., Shanghai Broadcast and Television Corp. |
|
| 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 |