CN1013534B - Apparatus for correcting offset effect of three-color cathode ray tube - Google Patents
Apparatus for correcting offset effect of three-color cathode ray tubeInfo
- Publication number
- CN1013534B CN1013534B CN 87102686 CN87102686A CN1013534B CN 1013534 B CN1013534 B CN 1013534B CN 87102686 CN87102686 CN 87102686 CN 87102686 A CN87102686 A CN 87102686A CN 1013534 B CN1013534 B CN 1013534B
- Authority
- CN
- China
- Prior art keywords
- grid
- difference
- stomidium
- thickness
- oblong
- 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
Links
- 230000000694 effects Effects 0.000 title claims abstract description 8
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003086 colorant Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 6
- 238000007634 remodeling Methods 0.000 description 4
- 238000013213 extrapolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Images
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
In order to avoid the offset effect of the red and blue light spots of a three-color cathode ray tube in which cathodes are arranged in a line varying with the change of the focus voltage, holes (5, 6) corresponding to the two colors are enlarged by a distance of about 0.1 to 0.2 mm.
Description
The objective of the invention is in the trichromatic cathode tube that the negative electrode in-line is arranged, to change the means for correcting of caused deviation effect by focus voltage.
People confirmed already: (the electron gun type comprises a prefocus lens and (focusing) main lens in trichromatic cathode tube, that is to say, generally form by 5 or 6 grids altogether, when the change focus voltage, for example carry out the transition to 10KV from 8KV, for the illumination of same luminescent substance, just changed position corresponding to red and blue luminous point.This phenomenon is confirmed when the calibration test of carrying out electron gun (being commonly referred to FRAT, i.e. focus grating calibration test).The change of this light spot position has detrimental effect to convergence.
In order to correct this effect, to the core punching press in addition of grid 2, and changed the shape of grid 2, this is called " G2 that PRAT is constant ".This punching press can cause the distortion of grille plane inevitably, thereby the astigmatism of target ray tube plays detrimental effect, therefore needs to increase necessary focus voltage to compensate this phenomenon.
Content of the present invention is the means for correcting about above-mentioned effect, does not need the remodeling of G2, it is smooth that the surface of grid G2 still keeps, and this device should be to use simply and spend less.
According to device of the present invention, with regard to the trichromatic cathode tube that the negative electrode in-line is arranged is an electron gun, and the stomidium of its 4th grid (generally corresponding to red and blue) has occurred characteristic with respect to their original center between peripheral part of their institute's centre bores of facing (corresponding to green) and their periphery remain poor.This characteristic difference is the difference of shape or thickness or level for total figure of grid.
After the visualization of the detailed and accompanying drawing of reading several execution modes is described, can have a better understanding to the present invention, accompanying drawing is:
-Fig. 1 is the plane graph according to a G4 preferred implementation of the present invention.
-Fig. 2 and Fig. 3 are the profiles of two execution modes in addition according to G4 of the present invention.
The invention relates to electron gun type trichromatic cathode tube and contain a prefocus lens (being generally grid 1～4) and a focusing main lens (be generally grid 5, and be grid 6 where necessary), and the emitting cathode of three in-line alignment arrangements.
Be compensation observed above-mentioned phenomenon when FRAT tests, the present invention considers and changes the 4th grid G4, rather than the second grid G2, and the second grid G2 keeps the plane, need not to compensating this phenomenon in the face of G2 remodeling.Present patent application person confirmed already: the remodeling of grid G4 is set about than being easier to, and lessly emits the common character to them that dysgenic risk is arranged, this be G2 remodeling can not accomplish.
In three execution modes of the present invention shown in the drawings, we are from having the grid G4 of common shape.As shown in Figure 1, the 4th grid (mark 1) is wealthy ellipse diagram shape, the circular port 2,3,4 that has three equidistant arrangements of in-line at first, this 4th grid shines redness, the blueness of trichromatic cathode tube, the path of green emitting material respectively as charged electron beam.And grid 1 is made the part of this trichromatic cathode tube.
Among Fig. 1, originally rounded stomidium 2 and 4 is represented by dotted lines in their end section, that is to say, their decentre hole 3 semi-circular portion farthest is represented by dotted lines it.
According to the present invention, hole 2 on grid 1 longitudinal axis and the 4 terminal directions by them are enlarged, so that obtain oblong hole 5,6, hole 5 and 6 is made distance corresponding to hole 2 and 4 respectively by the described longitudinal axis and is d " translation ".We confirmed already: for different cathode ray tubes be included in about 8KV to the focus voltage between the 10KV, in order correctly to compensate this phenomenon, this generally should be included between about 0.1mm and the 0.2mm apart from d.According to preferred a kind of execution mode, for the electron gun of 6 focused grid and about 8KV focus voltage, the value of d is about 0.13mm.In practice, we determine this value after by two tests, are that 0.10mm is two tests of 0.20mm with another by one for example, obtain the optimum distance value by means of linear interpolation method or linear extrapolation.If run off selected price scissors than calculated value, we can equal extrapolation gained calculated value and carry out a validation test for the third time with distance d.
According to the execution mode of Fig. 2, we are since the 4th grid 7 of a Common Shape, and it contains three common holes 8,9,10.We by all suitable methods on the bottom surface of grid 7 bottom surface of negative electrode (that is turn to), fix a width equal the width of grid and length no better than hole 8,10(corresponding to red and blue hole) rectangular slab 11 of centre-to-centre spacing.Plate 11 and grid 7 can be made with same material, and have almost same thickness.Plate 11 is joined brill with respect to grid 7 and is centered, and we bore a centre bore by hole 9 prolongations in plate 11, and distributes brill two and half holes by the extension of hole 8 and 10.The fine setting of plate 11 effect can be carried out when the length of matching board and/or thickness.Certainly, we can be since a grid that thickness is bigger, and reduces its end thickness, rather than increases the plate as plate 11 again.
Originally grid 12 shown on Fig. 3 is the grid of a common shape, and to negative electrode recurvation folding, this recurvation folding is to carry out on the central horizontal line of stomidium 13,15 significantly its circular end 16,17 for we.The fine setting of the correction that is provided by grid 12 cooperates the amplitude of recurvation folding to carry out, and the amplitude of recurvation folding almost is the thickness that equals grid 12.
Two execution modes for Fig. 2 and Fig. 3, by as implied above, obviously different and approach mean value since two numerical value, obtain the optimum value (these parameters are amplitudes of the recurvation folding of the size of grid 11 or grid 12) of parameter by linear interpolation method and linear extrapolation.
Claims (9)
1, in the trichromatic cathode tube that the negative electrode in-line is arranged, change the means for correcting of caused deviation effect by focus voltage, the type trichromatic cathode tube contains 5 or 6 focused grid, first group of described focused grid constitutes prefocus lens, second group of described grid constitutes main focusing lens, described focused grid is furnished with second grid of a planar shaped and the 4th grid of an oblong, the 4th grid of oblong contains the circular port of three alinements, it is characterized in that: described the 4th grid is one that constitutes in that group grid of described prefocus lens, and it is poor that the remainder peripheral with it of the peripheral part towards the grid centre bore of the 4th grid stomidium presents characteristic with respect to its original center.
2, according to the device of claim 1, it is characterized in that: the characteristic difference is a shape difference.
3, according to the device of claim 2, it is characterized in that: described stomidium is to enlarge to its end direction on the grid longitudinal axis, so that obtain the oblong hole.
4, according to the device of claim 3, it is characterized in that: on the degree of depth that comprises between about 0.1mm and the 0.2mm, enlarge stomidium.
5, according to the device of claim 1, it is characterized in that: described characteristic difference is a difference in thickness.
6, according to the device of claim 5, it is characterized in that: the acquisition of difference in thickness is identical by fix a width dative grid width at the core of grid, and its length obviously equals the plate of the centre-to-centre spacing of stomidium, joins the brill stomidium onboard by the prolongation in the hole of grid.
7, according to the device of claim 5, it is characterized in that: difference in thickness obtains by reducing the grid end portion thickness.
8, according to the device of claim 1, it is characterized in that: the characteristic difference is the level difference with respect to the total figure of grid.
9, device according to Claim 8 is characterized in that: level difference is to roll over by the recurvation of the rounded ends of grid to obtain, and roughly at the height at grid stomidium center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102686 CN1013534B (en) | 1987-04-08 | 1987-04-08 | Apparatus for correcting offset effect of three-color cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102686 CN1013534B (en) | 1987-04-08 | 1987-04-08 | Apparatus for correcting offset effect of three-color cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87102686A CN87102686A (en) | 1988-10-26 |
| CN1013534B true CN1013534B (en) | 1991-08-14 |
Family
ID=4814064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102686 Expired CN1013534B (en) | 1987-04-08 | 1987-04-08 | Apparatus for correcting offset effect of three-color cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013534B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2039501C (en) * | 1990-04-16 | 1999-02-02 | Loren Lee Maninger | Color picture tube having inline electron gun with focus adjustement means |
-
1987
- 1987-04-08 CN CN 87102686 patent/CN1013534B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87102686A (en) | 1988-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |