CN201118784Y - White field equality adjustment circuit - Google Patents
White field equality adjustment circuit Download PDFInfo
- Publication number
- CN201118784Y CN201118784Y CNU200720157751XU CN200720157751U CN201118784Y CN 201118784 Y CN201118784 Y CN 201118784Y CN U200720157751X U CNU200720157751X U CN U200720157751XU CN 200720157751 U CN200720157751 U CN 200720157751U CN 201118784 Y CN201118784 Y CN 201118784Y
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- Prior art keywords
- white field
- intensifying ring
- negative
- positive
- capacitor
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Abstract
The utility model relates to a white field uniformity adjusting circuit, which solves the technical problem that the white field displayed by the current CRT television is not uniform. In order to solve the technical problem, the adjusting circuit has a capacitor connected to a positive accelerating grid of a package of a CRT television, and the other end of the capacitor and another capacitor are put to earth through a negative accelerating grid of the package, and the two ends of the second capacitor are connected with a diode in parallel. The horizontal parabola voltage of the positive accelerating grid of the package is added to the negative accelerating grid of the package through the simple circuit design, so the adjusting circuit can correct and compensate images when scanning each line, thereby effectively improving the problem of non-uniformity of white field caused by the feature of the image of light in the center and dim on margins.
Description
Technical field
The utility model belongs to the TV set circuit technical field, specifically, relates to the unit white field homogeneity adjustment circuit that a kind of CRT of being used for TV shows.
Background technology
At present, in existing C RT tv product, figure is referring to shown in Figure 1 for its television set displaying principle, and the capable parabolic shape of line pipe output adds to be expert to output through inductor L1, drive circuit and dynamic focusing transformer T1 among the figure coil-induced and wraps positive intensifying ring G2 and extremely go up.The row bag outputs to the voltage of positive intensifying ring G2 and negative intensifying ring G1 on the picture tube.The G1 utmost point and the G2 utmost point all are the voltage that cathode-ray that target ray tube (CRT) is launched quickens.G2 voltage is a positive high pressure, is used for quickening cathode-ray.G1 voltage is a negative voltage, and the height of voltage can be realized the adjusting to image brightness.
Adopt said structure, in various degree the white uneven situation of existence when the CRT television set shows.Its performance is, under pure white image, all around Bu Fen image compare with intermediate image dark a little, just Zhong Jian image seem can than around image whiter, influence the quality and the display effect of the image of television set demonstration like this.
Summary of the invention
The utility model white non-uniformity problem bright in the middle of the image that exists when CRT tv product in the prior art shows in order to solve, that secretly cause all around provides a kind of novel CRT television set unit white field homogeneity to adjust circuit.
Goal of the invention of the present utility model is achieved by the following technical solution:
A kind of unit white field homogeneity is adjusted circuit, comprises the row bag, it is characterized in that, the positive intensifying ring of described row bag connects an electric capacity, and the other end of described electric capacity is through negative intensifying ring and another capacity earth of described row bag, and the two ends of described another electric capacity are parallel with a diode.
Preferably, the positive intensifying ring and the negative intensifying ring of described row bag connect CRT monitor.
Preferably, the input of described row bag connects the dynamic focusing transformer.
Preferably, the input of described dynamic focusing transformer connects line pipe.
Preferably, described line pipe is connected with described dynamic focusing transformer by inductor, drive circuit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model by the bag of being expert at positive intensifying ring and negative intensifying ring between connect an electric capacity and negative intensifying ring and the ground of the bag of being expert between be connected another electric capacity, make the capable parabolic voltage of the positive intensifying ring that row wraps be added to the negative intensifying ring of row bag, when each row of scanning, all image is revised and compensated, improve the inhomogeneity purpose of image brightness to reach, improved white the inhomogeneous situation that the image centre is bright, secretly cause all around.
Description of drawings
Fig. 1 is existing C RT television set display circuit figure.
Fig. 2 is the circuit diagram of the utility model preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is described in further detail:
Referring to Fig. 2, in the utility model, though the capable parabolic shape of line pipe output is wrapped through the coil-induced row that outputs to of inductor L1, drive circuit and dynamic focusing transformer T1 among the figure, but in the present embodiment, the positive intensifying ring G2 of row bag connects capacitor C 1, the other end of capacitor C 1 is through negative intensifying ring G1 and another capacitor C 2 ground connection of described row bag, and the two ends of capacitor C 2 are parallel with diode D1.The voltage of the capable positive intensifying ring G2 that wraps can be added on the negative intensifying ring G1 of the bag of being expert at by the foregoing circuit design, the ratio adjustment of the appearance value parameter by capacitor C 1 and C2 is added to the size of parabolic shape amplitude of the negative intensifying ring G1 of row bag, because white the unevenness of CRT is not high usually, the voltage of therefore general this parabolic shape only need be adjusted smaller the getting final product in ground.Diode D1 mainly plays clamping action, and the parabolic voltage of the row bag being born intensifying ring G1 is clamped to below the 0.7V, is similar to and can thinks a negative voltage.The voltage that the row bag will be born the intensifying ring G1 and the positive intensifying ring G2 utmost point outputs on the picture tube, being used for the cathode-ray that the target ray tube launches quickens, the positive high voltage of G2 utmost point output is used for quickening cathode-ray, the image brightness that the negative voltage of G1 utmost point output is used for regulating picture tube.
The utility model is by simple circuit design, the capable parabolic voltage of the capable positive intensifying ring G2 utmost point that wraps is added to the negative intensifying ring G1 of row bag, corresponding parabolic voltage of each line-scanning period, the bag of being expert at is born under the effect of intensifying ring G1 voltage, the brightness of the mid portion of each row of image all can slightly reduce, therefore, play the effect that the entire image center brightness is reduced, improved white the inhomogeneous situation that the image centre is bright, secretly cause all around; And circuit structure is simple, easy to operate, be easy to promote the use of.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also belong to protection range of the present utility model.
Claims (5)
1, a kind of unit white field homogeneity is adjusted circuit, comprises the row bag, it is characterized in that, the positive intensifying ring of described row bag connects an electric capacity, and the other end of described electric capacity is through negative intensifying ring and another capacity earth of described row bag, and the two ends of described another electric capacity are parallel with a diode.
2, unit white field homogeneity according to claim 1 is adjusted circuit, it is characterized in that, the positive intensifying ring and the negative intensifying ring of described row bag connect CRT monitor.
3, unit white field homogeneity according to claim 1 is adjusted circuit, it is characterized in that, the input of described row bag connects the dynamic focusing transformer.
4, unit white field homogeneity according to claim 3 is adjusted circuit, it is characterized in that, the input of described dynamic focusing transformer connects line pipe.
5, unit white field homogeneity according to claim 4 is adjusted circuit, it is characterized in that, described line pipe links to each other with described dynamic focusing transformer by inductor, drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720157751XU CN201118784Y (en) | 2007-11-28 | 2007-11-28 | White field equality adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720157751XU CN201118784Y (en) | 2007-11-28 | 2007-11-28 | White field equality adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118784Y true CN201118784Y (en) | 2008-09-17 |
Family
ID=39993385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720157751XU Expired - Fee Related CN201118784Y (en) | 2007-11-28 | 2007-11-28 | White field equality adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201118784Y (en) |
-
2007
- 2007-11-28 CN CNU200720157751XU patent/CN201118784Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20111128 |