CN1040888A - Apparatus for detecting convergence deflection - Google Patents

Abstract

The present invention relates to measure the device of convergence deflection.Be equipped with: the components of photo-electric conversion; Deflection power; Luminous position when detecting the components of photo-electric conversion and being output as maximum is also controlled the control device of deflection power simultaneously.Poor G-B with respect to red (R), green (G), blue (B) three primary colors or per two looks, B-R, R-G tries to achieve the output of the components of photo-electric conversion, level when being maximum or position of centre of gravity respectively and vertical deflection position poor measured the level asked and the poly-amount of misunderstanding of vertical direction automatically.

And, the maximum output of color cathode ray tube detecting circuit is set, utilize the variation of potential focus, the crest of the crest of components of photo-electric conversion output waveform, and accurately take out as approximate regular distribution.

Description

Apparatus for detecting convergence deflection

The present invention relates to a kind of at color cathode ray tube manufacturing or use in the manufacturing of colour display device of color cathode ray tube, be convenient to adjust automatically the apparatus for detecting convergence deflection of assembling.

In the manufacturing engineering of color cathode ray tube or use in the manufacturing engineering of colour display device of color cathode ray tube, for reproducing original color, each electron beam that three primary colors are used in whole display surface zone, promptly will be adjusted to such an extent that make it to converge.Usually this adjustment is called to assemble and adjusts.

In the past, adjusted automation of operation, for example in " the color cathode ray tube colour purity is assembled the exploitation of automatic regulating apparatus " (the technical report IE77-72 of electronic communication association, 1978) literary composition, discussion was arranged about assembling.

Two kinds of technology are disclosed in this report, promptly the negative electrode by the conversion chromatic cathode ray tube makes its rubescent, blue, green monochromatic light, the reticulate pattern resolution chart that is input to color cathode ray tube is input to TV camera, is the technology of convergence deflection amount by the time difference measuring picture colouring side-play amount of synchronizing signal and vertical or horizontal line detecting signal; And, be used in whether obtain the technology that the primary colors grating is judged the colour purity of color cathode ray tube picture on the whole image at the state of launching any one red, blue, green electron beam.

Yet, used this device, the huge price of equipment is high.

Therefore,,, so until now, measure small color shift (misconvergence), also still rely on human eye to measure convergence deflection because the equipment of above-mentioned prior art is huge although the light-emitting area of color cathode ray tube is big.

For example, when mirroring the palisade white line on the picture of color cathode ray tube, in case color shift is arranged, the look of white line part just decomposes, and a side occurs red, and red green and Lan Se appear in opposite side, measure its color shift with human eye, measure convergence deflection according to the degree of color shift.

Above-mentioned prior art wants to test automatically with it, and the high large-scale plant of price should be arranged, and the space of the broadness of placing this device also will be arranged simultaneously.Not only want the operator to be skilled in technique but also exist, problem such as labour intensity is also big.

The adjustment that the maximum output of color cathode ray tube in the past detects is to make color cathode ray tube work under defined terms, on one side with observing the state of examining palisade striped and point-like luminous pattern.Adjust the potential focus that adds on the color cathode ray tube on one side, make it the clearest.

Yet above-mentioned prior art is because be to see with eyes, and the set point between the adjustment person has bigger difference.And the color cathode ray tube that in the gear of intelligence that is calculated as representative, uses, for being presented at tiny figure and literal on the picture, when adjusting the maximum output of cathode ray tube, will and put as adjusting object with fine line, this just exists the problem that diminishes operator's health.

Main purpose of the present invention provides a kind of apparatus for detecting convergence deflection that makes test automation with cheap device.

Another object of the present invention provides the apparatus for detecting convergence deflection of the High-Speed Automatic mensuration of a kind of energy.

A further object of the invention provides the simple circuit of a kind of usefulness makes the maximum output of the color cathode ray tube that detects the adjustment automation of maximum output detect the adjustment circuit.

Above-mentioned purpose is by being equipped with the device as the lower part to finish, and they are: be configured in the having of coloured cathode ray fluorescent surface front that the deflection coil of wire is housed and separate the components of photo-electric conversion that light harvesting is constructed; Export the deflection power of the above-mentioned deflection coil of wire in order to the output waveform that each electron beam that makes color cathode ray tube is moved by certain unit; Luminous position when being output as maximum in order to detect the above-mentioned components of photo-electric conversion is also controlled the processing unit of above-mentioned deflection power simultaneously.Owing to can obtain the picture of the luminous point horizontal direction of color cathode ray tube, the output of the components of photo-electric conversion when electron beam when sensitive surface and light-emitting area become the arrival of parallel position, be maximum.As a result, electron-beam convergence of all kinds is in a bit, if so-called convergence is talked about accurately, light-to-current inversion output maximum occurs at same position substantially, in case misconvergence is arranged, along with the difference of side-play amount, maximum appears in electron beam when arriving diverse location.Therefore, the position of electron beam can be accurately and easily obtained, thereby just convergence deflection can be measured in view of the above.

Above-mentioned purpose also can be by being equipped with the device as lower member to finish, and these parts are: the lens that are arranged on the amplification usefulness of the coloured cathode ray fluorescent surface front that the deflection coil of wire is housed; The components of photo-electric conversion that three light accepting parts that can hold two look fluorophor grain sizes are arranged on the inner opposite angle direction of the fluorophor grain of the color cathode ray tube that amplifies with lens with this amplification; The output waveform that grating is moved by certain unit is exported to the deflection power of the above-mentioned deflection coil of wire; The stop position of above-mentioned components of photo-electric conversion output when maximum can be detected and the processing unit of above-mentioned deflection power will be controlled simultaneously.Fixedly the luminous position of color cathode ray tube allows grating move, when the electron beam of luminous position arrives the central shaft of each sensitive surface of the components of photo-electric conversion, and the output maximum of the components of photo-electric conversion.Therefore the stop position relation in the time of can becoming maximum by the light-to-current inversion output corresponding with three primary colors is obtained convergence deflection.As a result, each electron beam converges at a bit, if when so-called convergence is accurate, becomes maximum in the output of same position light-to-current inversion substantially, in case misconvergence is arranged, along with the difference of side-play amount, occurs maximum in different positions.

Above-mentioned purpose can also reach like this, promptly is equipped with following each parts; Be arranged on the optical lens of coloured cathode ray fluorescent surface front; At this optical lens rear, the components of photo-electric conversion of relative color cathode ray tube tilted configuration; The processing unit of the luminous position when that generation makes is red, green, the vertical or horizontal line of Lan Sanse keeps at a certain distance away luminous signal and the output that detects the above-mentioned components of photo-electric conversion simultaneously become maximum; By the interval of the maximum output of the above-mentioned components of photo-electric conversion maximum output becoming, obtain convergence deflection, thereby realize above-mentioned purpose.Therefore the output maximum of its components of photo-electric conversion of element that the luminescence center axle that color cathode ray tube is of all kinds such as the central shaft of the components of photo-electric conversion match can be become maximum position of components relation and measure convergence deflection by the light-to-current inversion output relative with many three primary colors.As a result, each electron beam comes together in a bit, if so-called convergence is talked about accurately, in the position of same position or corresponding fractional dose of all kinds, light-to-current inversion output becomes maximum substantially, and when misconvergence, corresponding with side-play amount, electron beam becomes maximum when arriving different positions.

Above-mentioned purpose also can reach like this, promptly is equipped with following each parts: the camera head of the luminous pattern of picked-up color cathode ray tube; Differential circuit with this video output differential; Binarization circuit with this differential output binaryzation; This two-value signal is carried out the Fourier Tranform device of Fourier Tranform; The counter of statistics Fourier Tranform output; Import this count signal, just export the control circuit of next potential focus instruction whenever counting is over; Potential focus is added to the potential focus generation power supply of color cathode ray tube by this potential focus instruction; Owing to counting output is become maximum some adjustment as best focal point, the crest of components of photo-electric conversion output waveform is taken out as the crest near regular distribution.Operating state picked-up luminous pattern at color cathode ray tube.This shooting output is carried out differential, binaryzation, carried out two-dimentional Fourier Tranform then, and count by counter.Therefore, the counting of counter promptly outputs to potential focus generation power supply to potential focus instruction by making Fourier Tranform be output as maximum control circuit, potential focus is changed in turn and is added to color cathode ray tube from potential focus generation power supply.Resulting characteristic can be passed through when potential focus is changed in turn, and the potential focus the when counting of counter is output as maximum output is set at the potential focus of color cathode ray tube optimum and adjusts.

, owing to focus on when being in optimum state, the expansion minimum of electron beam, the briliancy of color cathode ray tube light-emitting area are just maximum.And the shape of color cathode ray tube electron beam is the expansion of Gaussian Profile shape in general, particularly because be in the state light of three looks being taken a sample with shadow mask hole, even merely try to achieve light-to-current inversion output maximum, can not obtain enough precision.About this point, the present invention adopts the way of measuring again behind video output the carrying out Fourier Tranform for getting rid of the influence with the shadow mask sampling, and precision is improved.

Brief description of drawings

The preferred embodiments of the present invention narration together in conjunction with the accompanying drawings, wherein:

Fig. 1 illustrates the circuit structure diagram of first embodiment of the invention;

Fig. 2 is a components of photo-electric conversion front view used among Fig. 1;

Fig. 3 illustrates the output waveform figure of deflection power used among Fig. 1;

(a) vertical deflection oscillogram; (b) horizontal deflection waveform figure;

Fig. 4 is in order to illustrate that luminous point of the present invention moves key diagram;

Fig. 5 is explanation the present invention, the front view of display color cathode ray tube and components of photo-electric conversion correlation.

Fig. 6 a and Fig. 6 b illustrate the output waveform figure of the components of photo-electric conversion used among Fig. 1;

Fig. 7 is depicted as explanation the present invention, shows the vertical section key diagram of luminous point and components of photo-electric conversion correlation;

Fig. 8 illustrates the circuit structure diagram of the present invention the 2nd embodiment;

Fig. 9 illustrates the amplifying lens used among luminous point and Fig. 8 and the correlation figure of the components of photo-electric conversion;

Figure 10 is the oblique view of the components of photo-electric conversion used among Fig. 8;

Figure 11 is the fluorophor grain among Figure 10 and the graph of a relation of components of photo-electric conversion light accepting part;

Figure 12 is the light-emitting area of color cathode ray tube and the graph of a relation of the components of photo-electric conversion;

Figure 13 is the deflection power output waveform figure among Fig. 8;

(a) vertical deflection oscillogram;

(b) horizontal deflection waveform figure;

(c) use so that the direct current oscillogram that grating moves;

(d) (c) is added to oscillogram on (a);

(e) (c) is added to oscillogram on (b);

Figure 14 is the output of the components of photo-electric conversion in the presentation graphs 8 such as the relation of grating amount of movement;

Figure 15 is the circuit structure diagram of the 3rd embodiment of the present invention;

Figure 16 is the luminous point among Figure 15 and the graph of a relation of the optical lens and the components of photo-electric conversion;

Figure 17 A and Figure 17 B are the components of photo-electric conversion and graph of a relation red, green, blue bright line;

Figure 18 (a) and (b) are light-to-current inversion output maps of the components of photo-electric conversion used among Figure 15;

Figure 19 is the circuit structure diagram of the maximum output detecting circuit of the used color cathode ray tube of the present invention.

Figure 20 is the face front view of the used color cathode ray tube of Figure 19;

Figure 21 and Figure 22 are the luminous point key diagrams of the used color cathode ray tube of the present invention.

The explanation of preferred embodiment

Fig. 1 is the circuit structure diagram of first embodiment of the invention.

Fig. 2 is the front view of the components of photo-electric conversion used among Fig. 1.

In Fig. 1, the voltage of regulation is added on the color cathode ray tube 1 with excitation power supply 2.Making electron beam by certain unit, for example 0.1mm moves deflection power 4 and receives the deflection coil of wire 3.And the lens 5 of garden tubular (Chlindrical state) are vertically set on the light-emitting area front of color cathode ray tube 1.As shown in Figure 2, by picture CCD(charge coupled device, Charge couyled Device) the such separation light receiving unit 6 of element ₁-6 _nForm, have and separate the rear that the one dimension components of photo-electric conversion 6 that are subjected to the light structure equally vertically are arranged on garden tubular lens 5.The light-to-current inversion output of these components of photo-electric conversion 6 uses the processing unit of being made up of microcomputer 7 to carry out signal processing.And from control signal 7a, the 7b of processing unit 7 outputs in order to control excitation power supply 2 and deflection power 4.

Below, assay method is described.

Fig. 3 is the output waveform figure of the used deflection power of Fig. 1, and wherein (a) is the vertical deflection oscillogram, (b) is horizontal deflection waveform figure.

Fig. 4 is in order to illustrate that luminous point of the present invention moves key diagram.

In Fig. 1, use by the control signal 7a that forms from the switching signal of handling device 7 and go to control excitation power supply 2 in order to converting colors, make a kind of look in red, green, blue three kinds of looks luminous.And be used for removing to control deflection power 4 from the control signal 7b that handles device 7, the output waveform of deflection power 4 as shown in Figure 3, in a section of vertical deflection power supply 8, when horizontal yoke current being divided into tens thousand of ladders and controlling, luminous point 10 as shown in Figure 4, along laterally moving in turn.Move in the horizontal direction that place when finishing, luminous point 10 moves one section downwards, comes and goes and repeats same action.

Fig. 5 shows in order to the front view of the color cathode ray tube of the present invention and components of photo-electric conversion relation to be described.Fig. 6 A and Fig. 6 B are the output waveform figures of the components of photo-electric conversion used among Fig. 1.

The action that luminous point is moved, the light-to-current inversion output 11 of the components of photo-electric conversion 6 that the along continuous straight runs at upright position vi place moves, its waveform is the shape shown in Fig. 6 A.Therefore, respectively three primary colors are obtained its light-to-current inversion output 11 by the order of red (R), green (G), blue (B), the difference of the horizontal deflection position in the time of just becoming maximum respectively by them is obtained the poly-amount of misunderstanding of transverse direction.

That is to say that do not misunderstanding poly-normal occasion, as shown in Figure 6A, R, G, each output waveform 11 of B coincide together, and when misunderstanding was poly-, shown in Fig. 6 B, the output waveform 11 of R, G, B was offset each other.

Then describe below the misunderstanding of vertical direction is poly-.

Fig. 7 shows in order to the vertical section key diagram of the luminous point of the present invention and components of photo-electric conversion relation to be described.

Now, the luminous point 10 of each upright position shown in let us Fig. 7 is with i luminous point 10 _iN light receiving unit 6 of the relative components of photo-electric conversion 6 ₁-6 _nSensitive surface, the output of its light-to-current inversion is maximum.Along with sensitive surface direction skew up and down thus, the output of representing with COS θ of injecting the components of photo-electric conversion 6 reduces.Because the luminous position the when light-to-current inversion of these components of photo-electric conversion 6 output 11 be maximum can be at an easy rate by the light receiving unit 6 of the sensitive surface of the components of photo-electric conversion 6 ₁-6 _nThe position try to achieve, thereby following convergence deflection that just can and ask above-mentioned horizontal direction similarly be obtained the convergence deflection of vertical direction.

Like this, because be by the output 11 of the components of photo-electric conversion 6 light receiving unit 6 for maximum point ₁-6 _nThe position and the step difference of staircase waveform ask for convergence deflection, make the step of staircase waveform little to satisfying necessary convergence deflection readout resolutions or making its little separative element 6 to the components of photo-electric conversion 6 ₁-6 _nSize, just can try to achieve convergence deflection exactly.And, can obtain cheap device because form by simple structure discussed above.

Shown in the first embodiment of the present invention, in Fig. 1, garden tubular lens 5 are set after, make the optical convergence of horizontal direction, the certain limit of topped horizontal direction just more can make and measure precision and improve.

Fig. 8 is the circuit structure diagram of the present invention the 2nd embodiment, and Fig. 9 is the luminous point amplifying lens as shown in Figure 8 and the graph of a relation of the components of photo-electric conversion.

Use among Fig. 8 and Fig. 9 and the same element of Fig. 1 place uses the reference identical with this figure to number.In Fig. 8, grating will be connected with the deflection coil of wire 3 by the deflection power 4 that certain unit moves.And, the amplifying lens 5 that will constitute by convex lens ' the be arranged on light-emitting area front of color cathode ray tube 1, the components of photo-electric conversion of forming by a senser (Spot sensor) 6 be arranged on amplifying lens 5 ' the rear, the light-to-current inversion output of the components of photo-electric conversion 6 is handled with processing unit 7 equally as Fig. 1, and makes from control signal 7a, the 7b of processing unit 7 output control excitation power supplies 2 and deflection power (mistake is the deflection coil of wire-translator the original text) 4.

Above-mentioned amplifying lens 5 ' and the components of photo-electric conversion 6, as shown in Figure 9, be arranged on make amplifying lens 5 ' and 1 corresponding to position of luminous point 8i of the center of the components of photo-electric conversion 6 and color cathode ray tube 1 on.

Figure 10 is the oblique view of the components of photo-electric conversion used among Fig. 8, and Figure 11 is the fluorophor grain among Figure 10 and the graph of a relation of components of photo-electric conversion light accepting part.

And the light-to-current inversion part of the components of photo-electric conversion 6 as shown in figure 10, has three light accepting part 6a, 6b, 6c, correspondingly with each light accepting part is equipped with two lead-out wire 9a respectively ₁, 9a ₂, 9b ₁, 9b ₂, 9c ₁, 9c ₂

Above-mentioned light accepting part 6a, 6b, 6c, as shown in figure 11, to have at tri-color phosphor grain R be that red fluorophor grain, G are that green luminophore grain, B are blue glimmering body grains for its height V, width H) the inner opposite angle direction only hold the size of two look fluorophor grains.And with the lateral separation of fluorophor grain promptly at the interval that laterally occurs with the fluorophor grain as P, suppose that multiple is n, then light accepting part 6a, 6b, 6c be subjected to light at interval d following relation is arranged:

d＝ (P)/6 n-（1）

In Figure 11, d _A-bBe the interval between light accepting part 6a～6b, d _B-cBe the interval between light accepting part 6b～6c, d _A-cIt is the interval between light accepting part 6a～6c.

Figure 11 illustrates multiple n and is chosen as 4 and 8 o'clock situation.Like this, if big or small V, the H of light accepting part 6a, 6b, 6c and interval d relative fluorescence body grain array keep certain rules, each light accepting part 6a, 6b, 6e just occupy the so altogether position size of per two colour cells among primary colors fluorophor grain R, G, the B.

Assay method to convergence deflection describes below.

Figure 12 is the light-emitting area of color cathode ray tube and the graph of a relation of the components of photo-electric conversion, and Figure 13 is the output waveform figure of the deflection power among Fig. 8, and Figure 14 is the output of the components of photo-electric conversion in the displayed map 8 and the graph of a relation of grating amount of movement.

In Fig. 8, be used for from the control signal 7a control excitation power supply 2 of handling device 7, as shown in figure 12, on the 1a of the face of cathode ray tube 1, select of the same colour among red, green, the Lan Sanse, make ordinate 10V send out the light of this look, for remaining all the other two looks, also carry out equally in order.For carrying out raster scan, flowing through vertical sawtooth electric current Vs such shown in Figure 13 (a) and (b) in the deflection coil of wire 3 ₁With horizontal sawtooth current Hs ₁At this, make be shown in Figure 13 c with vertical sawtooth electric current Vs ₁The synchronous stairstepping direct current Ds horizontal sawtooth current Hs shown in Figure 13 b that is added to ₁On become the horizontal yoke current Hs shown in Figure 13 e ₂, allow this horizontal yoke current Hs ₂With vertical sawtooth electric current Vs ₁Flow through the inclined to one side coil of wire 3 by the effect from the processing signals 7b of processing unit 7, order comprises that the grating of the ordinate 10V among Figure 12 moves in turn along directions X, passes the components of photo-electric conversion 6.At this moment processing unit 7 is delivered in the light-to-current inversion output of the components of photo-electric conversion 6 each light accepting part 6a, 6b, 6c and stored.Above-mentioned residue two looks are also measured equally with above-mentioned explanation.

The light-to-current inversion output of measuring like this, along with moving of grating shown in Figure 14, from the combination of light accepting part 6a, 6b, 6c and fluorophor grain, two looks in three primary colors can obtain big light-to-current inversion output when luminous.That is to say,, can obtain green light-to-current inversion output IG from light accepting part 6a by combination shown in Figure 11 ₁Light-to-current inversion output IB with orchid ₁Can obtain IB from light accepting part 6b respectively equally ₂, IR ₂, 6c obtains IR from light accepting part ₃, IG ₃Obtain the maximum or the position of centre of gravity of the light-to-current inversion dateout that obtains by at this moment light accepting part 6a, 6b, 6c, with the direct current of this position as the skew between poor G-B(G, the B of each 2 look), the skew between B-R(B, R), the skew between R-G(R, G) obtain.If convergence deflection 0, this difference be the position by each light accepting part 6a, 6b, 6c be the face the array decision fluorophor spacing P 1/6.That is to say, to light accepting part 6a, if the dotted line in the image pattern 14 $I_G{}^{\prime }{}_l$ 、 $I_B{}^{\prime }{}_l$ Shown in have convergence deflection like that, then this difference G '-B ' increases along with the increase of skew.This convergence deflection amount can easily be tried to achieve by the grating amount of movement of each section of direct current Ds.Also can carry out equally light accepting part 6b, 6c.

In view of the above, can obtain the X(horizontal stroke) convergence deflection of direction.About the Y() convergence deflection of direction, the available horizontal line 10H that makes is luminous, will by from the excitation of the control signal 7b of processing unit and the electric current that flows through the electric current of the deflection coil of wire and above-mentioned occasion more bring and try to achieve.That is to say the vertical yoke current Vs shown in Figure 13 a ₂Flow through as vertical deflection ground stream, make the horizontal yoke current that flows through be Figure 13 d-translator for mistake in Figure 13 b(original text) shown in horizontal sawtooth current Hs ₁, grating Rs is moved to the Y direction, just can be with trying to achieve the convergence deflection of above-below direction with above-mentioned same program.

Like this, because convergence deflection is to be tried to achieve by the differential of direct current that is output as maximum or focus point place at the components of photo-electric conversion 6, so, just can try to achieve convergence deflection exactly as long as the step of direct current staircase waveform is as far as possible little of necessary readout resolutions.

Figure 15 is the circuit structure diagram of the present invention the 3rd embodiment, and Figure 16 is the luminous point in Figure 15 and the graph of a relation of the optical lens and the components of photo-electric conversion.

In Figure 15, will be with so that the deflection power 4 of electron beam scanning be received the deflection coil of wire 3.And amplify the optical lens 5 of usefulness ' the be configured in front of the light-emitting area 1a of color cathode ray tube 1, the one dimension components of photo-electric conversion 6 be configured in this amplify with optical lens 5 ' the rear.At this, the one dimension components of photo-electric conversion 6 as shown in Figure 16, the relative face tilted configuration of cathode ray tube, the luminous point 10 of face 1a is by optical lens 5 ' inject 1 unit 6i of the light accepting part of the one dimension components of photo-electric conversion 6.The light-to-current inversion output of the above-mentioned one dimension components of photo-electric conversion 6 is carried out signal processing with processing unit 7.And by control signal 7a, the 7b of processing unit 7 output control excitation power supplies 2 and deflection power 4.

Figure 17 A, Figure 17 B are the components of photo-electric conversion and graph of a relation red, green, blue bright line, and Figure 18 (a) and (b) are light-to-current inversion output maps of the components of photo-electric conversion used among Figure 15.Herein, control signal 7a controls excitation power supply 2, shown in Figure 17 A, Figure 17 B, makes red, green, ordinate Rv, the Gv of Lan Sanse, Bv formula horizontal line R _H, G _H, B _HTo certain orientation, a certain amount of at interval horizontal P at interval _HOr vertical P at interval _V(for example about 5mm) is luminous.

During θ=45 in Figure 17 A such as Figure 17 B °, the length l of the components of photo-electric conversion 6 is represented with following formula:

l ≥ 2 $\sqrt{2}$ P _H- - - - - - ( 2 )

l ≥ 2 $\sqrt{2}$ P _V- - - - - - ( 3 )

Below assay method is described.At first describe the misunderstanding of transverse direction is poly-.Be used for shown in Figure 17 A, making the so red ordinate R of sensitive surface of the one dimension components of photo-electric conversion 6 that incide tilted configuration from the control signal 7a control excitation power supply 2 of handling device 7 _V, green ordinate G _V, blue ordinate B _VHorizontal P at interval staggers _HAnd it is luminous.The waveform of the light-to-current inversion of the one dimension components of photo-electric conversion 6 output at this moment is shown in Figure 18 a.Promptly for the horizontal P at interval of luminous pattern _HIf, with optical lens 5 ' coefficient as K ₁(K ₁=2～3), at mobile KiP only _HThe position try to achieve the vertical briliancy output P of each luminous pattern _RV, P _GV, P _BVIn the misunderstanding of transverse direction is poly-, if red and green as HRG, orchid and green as H _BG, that then actual light-to-current inversion is exported is K at interval ₁(P _H+ H _RG) and K ₁(P _H+ H _RG), simply calculate with processing unit 7, just can try to achieve the poly-amount of misunderstanding.

Describe the misunderstanding of longitudinal direction is poly-below.The misunderstanding of longitudinal direction is poly-also as above-mentioned same, if make the red dash R shown in Figure 17 B _H, green horizontal line G _H, blue horizontal line B _HVertical P at interval staggers _VAnd luminous, just obtain light-to-current inversion output such shown in Figure 18 b.In Figure 18 b, P _RH, P _GH, P _BHRepresent horizontal briliancy output of all kinds respectively.So.For the vertical interval Pv of luminous pattern, make lens 5 ' coefficient be K ₂, in the misunderstanding of longitudinal direction is poly-, as with red and green as V _RG, blue and green as V _BG, then that light-to-current inversion output is K at interval ₂(P _V+ V _RG) and K ₂(P _V+ V _BG), can resembling the misunderstanding of asking transverse direction, to try to achieve the misunderstanding of longitudinal direction poly-poly-.

If maximum convergence deflection amount is designated as △ C _V, the wire spoke of luminous pattern is designated as △ W, then the horizontal P at interval of luminous pattern _H, vertical P at interval _VAnd the length 1 of the one dimension components of photo-electric conversion 6 can determine with following (4)～(6) formula respectively:

P _H≥2（△C _V+△W）/COSθ-（4）

P _V≥2（△C _V+△W）/COSθ-（5）

l≥3（△C _V+△W）/COSθ-（6）

Because can try to achieve the convergence deflection amount by the output gap of the one dimension components of photo-electric conversion 6 like this.As long as according to necessary resolution select the component size of the components of photo-electric conversion 6 and optical lens 5 ' relevant size, just can try to achieve exactly.And because the one dimension components of photo-electric conversion 6 are tilted configuration, when for example its inclination angle was 45 °, convergence deflection enlarged $\sqrt{2}$ Doubly, its precision just improves more.

Figure 19 uses in the present invention, and in order to the maximum circuit structure diagram of exporting detecting circuit of the color cathode ray tube of accurate mensuration convergence deflection, Figure 20 is the front view of the used color cathode ray tube picture of Figure 19.

As Figure 19 and shown in Figure 20, the relative picture 1a of the color cathode ray tube 1 small luminous point 10 that draws.Luminous pattern with video camera 13 these luminous points 10 of picked-up.At this, the relative luminous point 10 of image pickup scope 13a of shooting 13 will have enough spacious and comfortable scope.

Figure 21 and Figure 22 are the key diagrams of the luminous point of the used color cathode ray tube of the present invention.

Yet the actual light output of the luminous point 10 of color cathode ray tube 1 is distributed with scope shown in Figure 21, and the scope of its underpart increases and decreases with the variation of potential focus.But it is normally uneven at X, Y direction.

In the present invention, clearly take out the variation that utilizes potential focus for the crest that the output waveform of the components of photo-electric conversion 6 among Fig. 5,6A, the 6B, 14 and 18 will be shown in respectively as the approaching crest of facing distribution.It is to pass through light P by shadow mask hole as shown in figure 22 that the output of this light distributes former ₁～P _nCondensate, referring to arbitrary scan line n-1, and according to P ₁, P ₂, P ₃Luminous in turn, if potential focus is an optimum, then by light P ₁～P _nHigh pass component just maximum.In other words, Image Differentiation output is carried out integration in two-dimentional field, preferably the maximum point of the output F of following formula 7 as best focal point.

$F={\&Integral;}_{Y_1}^{{\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="891042903\_DRIMG3.png,891042903\_DRIMG4.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1}{\&Integral;}_{X_1}^{X_1}[u(\frac{2f}{2x}-t_1)+u(\frac{2f}{2x}+t_2)]\mathrm{dxdy}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(7\right)$

Wherein: the output of f-video camera

The u-step function

And, enough little if the bright spot of the fluorophor of color cathode ray tube, scanning is compared with the interval D of horizontal scanning line, the result with image is taken a sample with the δ function along the Y direction, represent with following formula 8:

$\mathrm{g\; (\; X、Y\; )\; =\; f\; (\; X、Y\; )}\underset{\mathrm{n\; =\; -\infty }}{\overset{\mathrm{+\; \infty }}{\mathrm{\&Sigma;}}}\mathrm{(\; Y\; -\; nD\; )\; \dots \dots (\; 8\; )}$

Wherein: f(X, Y)-original image

G(X, Y)-output image

n-0、1、2……

Because this is the multiplication in coordinate field, Fourier Tranform G(u, v) as shown in Equation 9:

G（u、v）＝F（u、v）＊S（V）……（9）

Spectrum S(V) being the spectrum of the δ function of interval D, is the pulse of frequency 2 π/D in other words.Because G(u, spectrum v) have fabric width, for the band domain B of video camera 13 of shooting usefulness _W, with satisfy formula 10 the interval be sampled as.

B _W＜ (π)/(D) ……（10）

So,, formula 9 is handled with circuit shown in Figure 19.That is to say that the video output 13b with the video camera 13 of shooting usefulness carries out differential with differential circuit 14, carries out (2f)/(2X) of formula (7).This differential output 14a by 2 value circuit 15, is transformed to 1,0 digital signal.This digital signal 15a adds to the input of trigger 16, and trigger output 16a is the input with door 17 1 sides, and the sampled signal CL that will meet formula 10 adds to the input with the opposing party of door 17, obtains sampling output 17a.Obtain (u((2f)/(the 2X)-t of formula 7 thus ₁)+u((2f)/(2X)+t ₂)).Behind this sampling output 17a usefulness counter 18 countings, obtain the output F of formula 7.With this counting output 18a, promptly export F, input control circuit 7.When a counting number was over, control circuit 7 just added to potential focus generation power supply 19 to next potential focus instruction 19a, and potential focus 19a is added to color cathode ray tube 1.

Carry out aforesaid operations repeatedly, the point when the counting output 18a that obtains counter 18 is maximum, the decision best focal point is set the potential focus instruction 19a suitable with it, the optimum focusing current potential is added to color cathode ray tube 1, so far.Finished the adjustment that detects in order to the maximum output of the color cathode ray tube of accurate mensuration convergence deflection.

In the above-described embodiments, be with the shooting means of video camera as color cathode ray tube 1, but it is not limited, for example with 0 dimension components of photo-electric conversion such as photodiodes, the light-emitting area 1a that makes color cathode ray tube also can obtain same result with luminous greater than the area of sheltering the components of photo-electric conversion 6.At this moment can omit in order to the signal source that produces small luminous point, video circuit etc.

The present invention obtains following good effect:

1. can accurately and automatically record convergence deflection with inexpensive devices.

2. can high speed and do not produce the look conversion, can use the color photoelectric conversion element.

3. the vertical output waveform because of deflection power is stairstepping, and detecting of maximum outgoing position is easy.

4. because that the size of components of photo-electric conversion separative element is done is little, can try to achieve easier, more accurately convergence deflection.

5. can make with simple circuit the adjustment automation of the maximum output of color cathode ray tube detecting circuit. Adjust precision, example is in the potential focus to the 7KV size, and its dispersive wave kinetic energy significantly improves precision below 10V.

Claims (14)

1, a kind of apparatus for detecting convergence deflection is equipped with:

The having of light-emitting area front that is arranged on the color cathode ray tube 1 that the deflection coil of wire 3 is housed separated the components of photo-electric conversion 6 that are subjected to the light structure;

The output waveform that the electron beam that makes color cathode ray tube 1 is moved by certain unit exports the deflection power 4 of the above-mentioned deflection coil of wire 3 to;

Luminous position when detecting the above-mentioned components of photo-electric conversion 6 and being output as maximum is also controlled the processing unit 7 of above-mentioned deflection power 4 simultaneously.

2, a kind of apparatus for detecting convergence deflection is equipped with:

The having of light-emitting area front that is vertically set on the color cathode ray tube 1 that the deflection coil of wire 3 is housed separated the components of photo-electric conversion 6 that are subjected to the light structure;

These components of photo-electric conversion 6 are arranged on the lens 5 between the color cathode ray tube 1 and the components of photo-electric conversion 6 relatively;

The output waveform that the electron beam that makes color cathode ray tube 1 is moved by certain unit outputs to the deflection power 4 of the above-mentioned deflection coil of wire 3;

Luminous position when detecting the above-mentioned components of photo-electric conversion 6 and being output as maximum is also controlled the processing unit 7 of above-mentioned deflection power 4 simultaneously.

3,, it is characterized in that the vertical deflection output waveform of above-mentioned deflection power (4) is a stairstepping according to the said detecting convergence deflection circuit of claim 1.

4,, it is characterized in that the vertical deflection output waveform of above-mentioned deflection power (4) is a stairstepping according to the said detecting convergence deflection circuit of claim 2.

5,, it is characterized in that said lens (5) is garden tubular (Cylindrical) according to the said detecting convergence deflection circuit of claim 2.

6,, it is characterized in that the above-mentioned components of photo-electric conversion 6 are one dimension components of photo-electric conversion according to the said detecting convergence deflection circuit of claim 1.

7, a kind of apparatus for detecting convergence deflection is equipped with:

Be arranged on the color cathode ray tube 1 that the deflection coil of wire 3 is housed the light-emitting area front amplification usefulness lens 5 ';

At the components of photo-electric conversion 6 that at least three light accepting parts that contain two look fluorophor grain sizes are arranged with the inner opposite angle direction of the fluorophor grain of the color cathode ray tube 1 of lens 5 ' amplification with this amplification;

The output waveform that grating is moved by certain unit is outputed to the deflection power 4 of the above-mentioned deflection coil of wire;

Stop position when detecting the above-mentioned components of photo-electric conversion 6 and being output as maximum is also controlled the processing unit of above-mentioned deflection power 4 simultaneously.

8,, it is characterized in that above-mentioned optical transform component 6 is sensers according to the said detecting convergence deflection circuit of claim 1.

9,, it is characterized in that the output waveform of above-mentioned deflection power (4) is a stairstepping according to the said detecting convergence deflection circuit of claim 7.

10, according to the said detecting convergence deflection circuit of claim 7, it is characterized in that the light accepting part of the light accepting part (6a, 6b, 6c) as the above-mentioned components of photo-electric conversion (6) is spaced apart d, the transverse direction spacing of fluorophor grain is P, multiple is n, then can obtain following relation:

d＝ (P)/6 n

11, a kind of apparatus for detecting convergence deflection is characterized in that being equipped with:

Be arranged on the optical lens 5 of the light-emitting area front of color cathode ray tube 1 ';

Be arranged on this optical lens 5 ' the rear and become the components of photo-electric conversion 6 of θ angle tilt with respect to color cathode ray tube;

Generation makes, and ordinate or horizontal line red, green, Lan Sanse are distinguished certain at interval distance P _V, P _HLuminous signal, and the processing unit 7 of the luminous position when detecting the above-mentioned components of photo-electric conversion 6 simultaneously and being output as maximum; And

Ask the convergence deflection amount by the interval that the maximum of the above-mentioned components of photo-electric conversion 6 is exported.

12,, it is characterized in that the length l of the above-mentioned components of photo-electric conversion 6 has when θ=45 ° according to the said apparatus for detecting convergence deflection of claim 11:

l ≥ 2 $\sqrt{2}$ P _V

l ≥ 2 $\sqrt{2}$ P _H

13, according to the said apparatus for detecting convergence deflection of claim 11, it is characterized in that the length when the above-mentioned components of photo-electric conversion 6 is l, the angle of inclination is θ, the horizontal P that is spaced apart _H, the vertical P that is spaced apart _V, maximum convergence deflection amount is △ C _V, the live width of luminous pattern is △ W, then l, P _H, P _VCan be represented by the formula:

1≥3（△C _V+△W）/COSθ

P _H≥2（△C _V+△W）/COSθ

P _V≥2（△C _V+△W）/COSθ

14, a kind of maximum of apparatus for detecting convergence deflection output detecting circuit is characterized in that being equipped with:

The shooting means 13 of luminous pattern in order to picked-up color cathode ray tube 1;

This shooting output is carried out the differential circuit 14 of differential;

Make the binarization circuit 15 of this differential output binaryzation;

This two-value signal is carried out the Fourier Tranform means 16,17 of Fourier Tranform;

The counter 18 of counting Fourier Tranform output;

Whenever the be over control circuit 7 of the next potential focus instruction of back output of the input of this count signal and counting;

According to this potential focus instruction the potential focus that potential focus adds to color cathode ray tube 1 is produced power supply 19; And

Some when counting is output as maximum is adjusted as best focal point.

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