CN1414783A - Projection television outomatic convergence correcting system - Google Patents
Projection television outomatic convergence correcting system Download PDFInfo
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- CN1414783A CN1414783A CN 02133729 CN02133729A CN1414783A CN 1414783 A CN1414783 A CN 1414783A CN 02133729 CN02133729 CN 02133729 CN 02133729 A CN02133729 A CN 02133729A CN 1414783 A CN1414783 A CN 1414783A
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Abstract
An automatic convergent calibration system for projection TV receiver includes a microprocessor, a convergent processing circuit, a number of light transducer set up at outside of projection screen image zone so that they can be used to detect the convergent calibration scale signal produced on the screen item by item at the time of automatic convergent calibration with MCU control, a signal amplifying circuit being used for the amplifying process to the signal output from light transducer detection and sending the processed signal to the microprocessor which compares the detected scale signal with the standard scale signal to calcualte out the shifting direction and quantity of convergence as well as convergent regulation quantity which is written in the storage of the convergent processing circuit.
Description
Technical field
The present invention relates to a kind of corrective system and method for image geometric distortion.Specifically, relate to a kind of 3 cathode ray tubes (be called for short, CRT) in the projection TV of Gou Chenging, the digital convergence system of correcting image geometric distortion, convergence distortion automatically.
Background technology
Constitute in the back projection television at 3 CRT, R, G, three projection tubes of B project image onto on the screen with different angles.The image that shows on screen like this will inevitably geometric distortion and chromatic distortion can occur.R, the G of each pixel of shown image, B three primary colors are overlapped correct coloured image in order on screen, to show on the screen of projection TV.This work is to be finished by the digit convergence circuit of projection TV.The digit convergence circuit is arranged in the current waveform of the convergence adjustment coil of CRT afterbody by control, can carry out the correction of geometric distortion to any primary color image among R, G, the B on the image of screen display, guarantee that the image that shows does not have geometric distortion and R, G, B three primary colors to overlap, and obtains normal coloured image on screen.Before back projection TV dispatches from the factory, assemble and finish by auto convergence debugging instrument or manual debugging.When back projection TV dispatched from the factory, it was assembled and has generally debugged well, can normally teleview.
But, because the convergence of back projection TV requires more accurate, when projection TV in transportation opticator since vibrations produce less displacement, by the three unities to another place and screen when changing GEOMAGNETIC CHANGE or since component parameter with the slight variation of operational environment generation etc., the capital causes R, G, B tristimulus image to produce different skews, thereby causes the variation of convergence.Even assemble well when dispatching from the factory, when the user uses, may influence picture quality because of fusionization.Past needs after-sale service personnel debugging to the doorstep after back projection TV is sold, this has just increased after-sale service cost, and assembles the image that situation about changing has also influenced product.
Produce geometric distortion, assemble the bearing calibration of distortion for user side, a kind of scheme be by cmos sensor when dispatching from the factory, the standard testing image that shows on projection screen is taken a picture, and relevant image information is stored; When skew assemble to take place in user's hand and carry out timing, the standard testing image that shows on the projection screen is taken a picture again, the image information with storage compares then, and the difference that produces is assembled compensation, thus finish convergence from dynamic(al) correction.This method sampled point is more, the algorithm complexity, and cost is higher, and is also higher to technological requirement, and correction time is long, needs the more operation of user, can not use for the user very easily.
Summary of the invention
The object of the present invention is to provide the projection television outomatic convergence correcting system that a kind of cost is low, speed is fast, simple to operate.
For achieving the above object, projection television outomatic convergence correcting system of the present invention comprises microprocessor (being called for short MCU), assembles treatment circuit, is characterised in that also to comprise:
A plurality of optical sensors that are installed in the projection screen image-region outside are used for when outomatic convergence correcting, under MCU control, and the detection of the convergence correction scale signal that on screen, produces one by one;
Signal processing circuit be used for the processing and amplifying of light sensors output signal, and the signal after will handling outputs among the MCU;
MCU with light sensors to scale signal and standard scale signal compare, calculate the offset direction and the side-play amount of convergence, and then calculate the convergence adjustment amount, convergence is compensated and proofreaies and correct, and the data after will compensating and correct write in the convergence treatment circuit memory.
Projection TV auto convergence Adjustment System of the present invention has only increased several optical sensors and corresponding signal processing circuit on hardware cost, just realized the function of outomatic convergence correcting, greatly reduces cost.All finish automatically to the detection of signal with to the correction of assembling, saved the time greatly, simplified operation by software.
Below in conjunction with the drawings and specific embodiments apparatus of the present invention are described in further detail.
Description of drawings
Fig. 1 is the installation site schematic diagram of outomatic convergence correcting system optical sensor of the present invention on projection TV;
Fig. 2 is an outomatic convergence correcting system theory diagram of the present invention;
Fig. 3 is the horizontal offset of testing light sensor S1, the convergence of optical sensor S4 place image and the schematic diagram that optical sensor S3, optical sensor S4 place assemble the employed test scale of vertical offset figure;
Fig. 4 is that testing light sensor S1 place image is assembled the not schematic diagram of occurred level drift condition among Fig. 3;
Fig. 5 is that testing light sensor S1 place image is assembled the schematic diagram that drift condition to the right takes place among Fig. 3;
Fig. 6 is that testing light sensor S1 place image is assembled the schematic diagram that drift condition left takes place among Fig. 3;
Fig. 7 is the vertical offset of testing light sensor S1, the convergence of optical sensor S4 place image and the schematic diagram that optical sensor S3, optical sensor S4 place image are assembled the employed test scale of horizontal offset figure;
Fig. 8 is that also there is the schematic diagram of misconvergence situation in image after auto convergence coarse adjustment correction is finished;
Fig. 9 is the schematic diagram that width W, space D and the optical sensor selection of scale signal satisfied condition;
Figure 11 is that the slight schematic diagram of drift condition to the right appears in image;
Figure 12 is that the slight schematic diagram of drift condition left appears in image;
Figure 13 is an outomatic convergence correcting system convergence correction flow chart of the present invention.
Embodiment
Fig. 1 is the installation site schematic diagram of outomatic convergence correcting system optical sensor of the present invention on projection TV.4 optical sensors are installed in the outside of screen viewing area respectively, promptly on the mid point on projection TV scuncheon four limits.
Fig. 2 is an outomatic convergence correcting system theory diagram of the present invention, comprises several sections such as being used for light sensors signal processing circuit 1, convergence control MCU2 and peripheral electricity erasable memorizer (being called for short EEPROM) 3, convergence treatment circuit 4 and peripheral EEPROM5 thereof, convergence data D/A change-over circuit 6.Signal processing circuit 1 receives the signal that optical sensor S1～S4 detects, after detecting through I/V conversion, signal amplification, peak value respectively, output peak value sampling voltage is delivered to convergence control MCU2 and is carried out the A/D conversion, and the data after the conversion are used to calculate convergence deflection amount and convergence correction amount.By one group I
2The all working of treatment circuit 4 is assembled in 21 controls of C bus, and EEPROM3 is used to preserve the phase place adjustment data of convergence and assemble Backup Data, and EEPROM3 also hangs over I
2On the C bus 21.Assemble another group I of control MCU2
2C bus 22 when being used to be operated in the SLAVE pattern, receives the control command that complete machine MCU sends, as assembling data call, assembling adjustment modes and enter and withdraw from and outomatic convergence correcting order etc.The remote signal that is received by the complete machine remote-control receiving circuit also is sent to the remote control decoding part of assembling control MCU2, is used for directly receiving when assembling manual adjustment the control command of being sent by remote controller.Assemble synchronizing signal Hsync, Vsync that control MCU2 utilizes row, field, produce corresponding character signal according to the needs of adjusting, deliver to and assemble treatment circuit 4, after the convergence adjustment grid signal of assembling treatment circuit 4 generations and the stack of outomatic convergence correcting scale signal, export the complete machine display circuit to, in projection TV screen, demonstrate corresponding character and test signal.Assemble the main I of treatment circuit 4
2Articulate EEPROM5 on the C41 bus, EEPROM5 is used to store current convergence data, these data will be read in the register of assembling treatment circuit 4 inside as required, after assembling treatment circuit 4 processing, data are assembled in output, after carrying out D/A conversion, amplification, smothing filtering in the D/A change-over circuit 6, deliver to the convergence power amplifier, the convergence of projection TV is adjusted.OSD among Fig. 2 represents screen display signal, and BH, BV, GH, GV, RH, RV be the level and the vertical convergence control signal of representative color respectively, and SCL, SDA are respectively I
2The clock of C and data wire.
Fig. 3 is the horizontal offset of testing light sensor S1, the convergence of optical sensor S4 place image and the schematic diagram that optical sensor S3, optical sensor S4 place image are assembled the employed test scale of vertical offset figure.When carrying out outomatic convergence correcting, assembling treatment circuit 4 is that one group of vertical scale signal is sent at horizontal center successively respectively with optical sensor S1, S4, is the scale signal that vertical centre sends one group of level successively respectively with optical sensor S2, S3 then; Each group scale signal sends from the 1st to the 41st again in order successively, and promptly forming with image level or vertical center line is each one group of scale signal of 20 of both sides at center.Scale holding wire width is identical, is made as W, and spacing equates, is made as D.
Fig. 4 is that testing light sensor S1 place image is assembled the not schematic diagram of occurred level drift condition among Fig. 3.Send the back at each scale signal and measure the detected voltage of respective photosensor.When assembling not generation skew, picture centre is positioned at the center of screen, then the centre of scale signal that promptly the 21st shine on the optical sensor, assemble Controlled CPU 2 and when sending the 21st scale signal, detect the maximum voltage of optical sensor feedback, just can know convergence deflection not take place.
Fig. 5 is that testing light sensor S1 place image is assembled the schematic diagram that drift condition to the right takes place among Fig. 3.When image is offset to the right when making color misconvergence, then just irradiation is less than on the optical sensor for the 21st scale line, and (M＜21=bar scale line will shine on the optical sensor M on its left side.Assemble Controlled CPU 2 detects the optical sensor feedback when sending M bar scale signal maximum voltage, by calculating the side-play amount that to learn this point (set skew to the right for just).
Side-play amount=(W+D) * (21-M)
Equally, as shown in Figure 6, when image is offset to left when making color misconvergence, N (N＞21) the bar scale line on its right will shine on the optical sensor.Assemble Controlled CPU 2 detects the optical sensor feedback when sending N bar scale signal maximum voltage, by calculating the side-play amount that to learn this point (set skew to the right for just).
Side-play amount=(W+D) * (21-N)
In sum, assemble treatment circuits 4 and finish scanning when assembling Controlled CPU 2 controls by 41 scale line of the 1st scale line to the, when K bar scale signal, detect the voltage of optical sensor feedback, all by calculating the side-play amount that to learn this point (set to the right or downward skew for just).
Side-play amount=(W+D) * (21-K)
This side-play amount is a number that symbol is arranged, the direction of its positive negative indication skew, the size of its absolute value representation skew.
The vertical offset of horizontal offset that can record optical sensor S4 place image with above-mentioned identical scale signal and detection method and optical sensor S2, S3 place image.
Fig. 7 is the vertical offset of testing light sensor S1, the convergence of optical sensor S4 place image and the schematic diagram that optical sensor S3, optical sensor S4 place image are assembled the employed test scale of horizontal offset figure.Assembling treatment circuit 4 is the scale signal that vertical centre sends one group of level successively respectively with optical sensor S1, S4, is that one group of vertical scale signal is sent at horizontal center successively respectively with optical sensor S2, S3 then; Each group scale signal sends from the 1st to the 41st again in order successively, and promptly forming with respective photosensor level or vertical line is each one group of scale signal of 20 of both sides at center.
The method of above-mentioned detection optical sensor S1 place image level side-play amount can detect the horizontal offset of vertical side-play amount of optical sensor S1, S4 place image and optical sensor S2, S3 place image equally.So just, obtain four sensing station places, image is in 8 side-play amounts of level and vertical direction, and these 8 offset tag are as follows:
Optical sensor S1 level: S1 is vertical for the E1H optical sensor: E1V
Optical sensor S2 level: S2 is vertical for the E2H optical sensor: E2V
Optical sensor S3 level: S3 is vertical for the E3H optical sensor: E3V
Optical sensor S4 level: S4 is vertical for the E4H optical sensor: E4V
In the projection TV convergence yoke, the level that is focused at (H) of each projection tube is proofreaied and correct respectively with vertical (V) direction, by in H or V convergence coil with different coefficients add enter a profession or once or the secondary waveform finish the integral body adjustment of convergence.And above-mentioned side-play amount and following equation can be calculated each whole corrected value of adjusting coefficient when misconvergence easily:
H passage: horizontal translation DCH=(E1H+E4H)/2
Horizontal amplitude H1=(E3H-E2H)/2
The linear H2=of level (E3H+E2H)/2
Vertical bank V1H=(E4H-E1H)/2
V passage: vertical translation DCV=(E2V+E3V)/2
Field amplitude V1=(E1V-E4V)/2
Veritcal linearity V2=(E1V+E4V)/2
Horizontal tilt H1V=(E3V-E2V)/2
With this correction coefficient the integral body adjustment coefficient data of assembling in the treatment circuit 4 is compensated, get final product projection TV owing to the misconvergence that reasons such as earth magnetism cause is proofreaied and correct automatically.May compensate the imbalance that can't eliminate convergence 1 time, this may can repeat to proofread and correct until satisfying following exit criteria because measure error or debugging error cause this moment.
1. after the one-time detection circulation was finished, detected 8 side-play amounts were all near zero (not skew);
2. abnormal conditions are proofreaied and correct the time that surpasses setting.
Above-mentionedly be adjusted into thick correction, after finishing, the 21st detection line of scale signal shines on the optical sensor, assembles also to overlap substantially.But because the influence of the width of scale line, spacing, optical sensor area, the error of correction exists.As shown in Figure 8, the 21st scale line do not shine on the optical sensor fully, but system thought the debugging finish.For eliminate or reduce this kind error as far as possible, need carry out fine correction.We choose the satisfied condition as shown in Figure 9 of size L of width W, space D and the optical sensor of scale line, promptly satisfy L＞W+2D and L＜2W+D, when a scale line shone on the optical sensor fully, the adjacent scale line in its both sides can a part of shining on the optical sensor.Following arthmetic statement is an example with the skew of optical sensor S1 detected image horizontal direction, and remaining situation is identical.
Assemble control MCU2 and send the 20th and the 22nd scale line respectively, and detect the voltage of optical sensor S1 feedback at two time period T1 and T2 inner control convergence treatment circuit 4.Assembling when accurately having adjusted, because the 20th identical with the 22nd area that scale line shines on the optical sensor, then the voltage of twice feedback also is essentially identical, as shown in Figure 9.When image is assembled slight phase right avertence and is moved, this situation as shown in figure 10, article 20, the area that is mapped on the optical sensor of scale line shines area on the optical sensor greater than the 22nd scale line, then at the magnitude of voltage of T1 time period light feedback greater than magnitude of voltage in T2 time period light feedback.MCU is designated as the side-play amount of this point+and 1.When the image convergence slightly fails to agree skew, this situation as shown in figure 11, article 20, the area that is mapped on the optical sensor of scale line shines area on the optical sensor less than the 22nd scale line, then at the magnitude of voltage of T1 time period light feedback less than magnitude of voltage in T2 time period light feedback.MCU is designated as-1 with the side-play amount of this point.
Same method can be tried to achieve 8 the accurate adjustment side-play amounts of four sensing stations in level and vertical direction, and these 8 offset tag are as follows, and each side-play amount value is one of them of+1,0 ,-1:
Optical sensor S1 level: S1 is vertical for the e1H optical sensor: e1V
Optical sensor S2 level: S2 is vertical for the e2H optical sensor: e2V
Optical sensor S3 level: S3 is vertical for the e3H optical sensor: e3V
Optical sensor S4 level: S4 is vertical for the e4H optical sensor: e4V
Utilize the identical equation of coarse regulation, can obtain the whole corrected value of accurate adjustment, this corrected value value is one of them of+1,0 ,-1, that is to say, the whole step-length 1 of accurate adjustment is proofreaied and correct.
H passage: horizontal translation DCH=(e1H+e4H)/2
Horizontal amplitude H1=(e3H-e2H)/2
The linear H2=of level (e3H+e2H)/2
Vertical bank V1H=(e4H-e1H)/2
V passage: vertical translation DCV=(e2V+e3V)/2
Field amplitude V1=(e1V-e4V)/2
Veritcal linearity V2=(e1V+e4V)/2
Horizontal tilt H1V=(e3V-e2V)/2
With this correction coefficient the integral body adjustment coefficient data of assembling in the treatment circuit 4 is compensated equally, can proofread and correct the convergence errors after the above-mentioned coarse regulation.Owing to adjust with step-length 1,, advance the process that detects and adjust of repetition so the whole correction circulation of accurate adjustment is carried out.The exit criteria of circulation is
1. after the one-time detection circulation was finished, detected 8 side-play amounts all were zero (not skew);
2. abnormal conditions are proofreaied and correct the time that surpasses setting.
Can know according to above-mentioned detection method, after not having abnormal conditions (being blocked etc. as hardware fault, optical sensor) auto convergence to finish adjustment to R, G, B, the picture centre of R, G, B tristimulus image (i.e. the 21st detection line) all coincides with the center of screen.Convergence and image geometric distortion return to the kilter when dispatching from the factory.Simultaneously, the convergence data of assembling after control MCU2 will proofread and correct access from register, pass through I
2C21,41 buses store EEPROM3,5 into, finish the correction of auto convergence.
Figure 13 is an outomatic convergence correcting system convergence correction flow chart of the present invention.At first at step ST1, assemble control MCU2 control convergence treatment circuit 4 and on screen, show the 1st to the 41st level and Vertical surveyors' staff line at 4 optical sensor places successively, when showing, each scale line detects the feedback voltage of 4 optical sensors, and after the 41st scale line shown, the numbering of the scale line by relatively finding out the feedback voltage maximum.The level and the Vertical surveyors' staff wire size that for convenience of description optical sensor S1, S2, S3, S4 are detected maximum feedback voltage are labeled as NH1, NV1, NH2, NV2, NH3, NV3, NH4, NV4 respectively.
Step ST2 judges whether to exist bigger convergence drift.When NH1=NV1=NH2=NV2=NH3=NV3=NH4=NV4=21, convergence drift is less or do not have convergence drift, enters accurate adjustment aligning step ST3.Explanation has bigger misconvergence when not satisfying condition, and then enters the calculating that step ST4 carries out side-play amount.Step ST4 is according to described algorithm computation side-play amount and correcting value.In the convergence data of step ST5, after correction finishes, return after finishing with this result of calculation correct convergence treatment circuit 4.
Step ST3 will show the 20th and 22 scale line respectively at T1 and T2 time period, and detect the voltage data that 4 transducers fed back in T1 and T2 time period.For convenience of description, voltage data in T1 time period sensor feedback is labeled as v11, v12, v21, v22, v31, V32, v41, v42 respectively, voltage data in T2 time period sensor feedback is labeled as u11, u12, u21, u22, u31, u32, u41, u42 respectively, v11 represents horizontal direction (the signal scale line is for the vertical) magnitude of voltage that optical sensor S1 arrives in the T1 time detecting, V12 represent transducer S1 the T1 time detecting to vertical direction (the signal scale line is a level) magnitude of voltage, all the other method for expressing are identical.
Step ST6 compares with u11, u12, u21, u22, u31, u32, u41, u42 respectively the detected magnitude of voltage v11 of step ST3, v12, v21, v22, v31, V32, v41, v42, thereby judgement has or not the convergence slight shift.If in T1 and T2 time period, the magnitude of voltage of same optical sensor feedback is identical, illustrate that the 20th scale line is identical with the area that the 22nd scale line shines transducer, assemble not skew, outomatic convergence correcting finishes, the convergence data of assembling after control MCU2 will proofread and correct access from register, pass through I
2The C bus stores EEPROM3,5 into, finishes the correction of auto convergence.Otherwise convergence has skew, program to enter step ST7 to be adjusted with step-length 1 by the calculating that described accurate adjustment correcting algorithm carries out side-play amount, and turns back to step ST3.
Above-mentioned auto convergence to image is corrected, by RGB is to carry out respectively, after promptly step has been finished a kind of correction of color projection tube according to the method described above, more another kind of color is proofreaied and correct, thereby the scale signal colour is single, and consistent with the needs correction of color.
Claims (9)
1. an outomatic convergence correcting system comprises microprocessor, assembles treatment circuit, it is characterized in that this system also comprises:
A plurality of optical sensors that are installed in the outside, projection screen image visual zone are used for when outomatic convergence correcting, under MCU control, and the detection of the convergence correction scale signal that on screen, produces one by one;
Signal processing circuit be used for the processing and amplifying of light sensors output signal, and the signal after will handling outputs in the microprocessor;
Microprocessor with light sensors to scale signal and standard scale signal compare, calculate the offset direction and the side-play amount of convergence, and then calculate the convergence adjustment amount, convergence is compensated and proofreaies and correct, and the data after will compensating and correct write in the convergence treatment circuit memory.
2. convergence system according to claim 1 is characterized in that described optical sensor is 4, is installed in the outside of screen viewing area respectively, on the mid point on projection TV scuncheon four limits.
3. convergence system according to claim 1 is characterized in that described scale signal is is level or vertical centre with the optical sensor position, both sides symmetry, one group of horizontal or vertical scale holding wire of Chan Shenging one by one.
4. convergence system according to claim 3 is characterized in that the scale holding wire of described formation scale signal is equidistant, and the width of scale holding wire is identical.
5. convergence system according to claim 4, the scale holding wire that it is characterized in that described every group of scale signal from left to right or from top to bottom, number consecutively; The bar number of scale line is an odd number.
6. convergence system according to claim 5 is characterized in that the size L of width W, space D and the optical sensor of described scale line satisfies L＞W+2D and two conditions of L＜2W+D.
7. convergence system according to claim 6 is characterized in that the comparison of described detected scale signal and standard scale signal, and the calculating of convergence deflection direction and side-play amount is divided into thick correction and fine correction, and carries out according to the following steps:
At first the 1st step, at each optical sensor place, difference is reveal competence and Vertical surveyors' staff line on screen successively, when each scale line shows, detect the feedback voltage of optical sensor, and after scale line has shown, the numbering of the scale line by relatively finding out the feedback voltage maximum;
The 2nd judges whether to exist bigger convergence drift step by step, and when detecting scale line and be the center scale line, convergence drift is less or do not have convergence drift, enters the 3rd step accurate adjustment and proofreaies and correct.Explanation has bigger misconvergence when not satisfying condition, and then enters the calculating of the 4th stepping line displacement amount and correcting value, enters for the 5th step after finishing, and assembles the convergence data of treatment circuit with the result of calculation compensation correction;
The 3rd step at each optical sensor place, showed two scale line near scale line both sides, center respectively successively, detected the voltage data of optical sensor feedback;
The 6th step compared detected magnitude of voltage of the 3rd step, thereby judgement has or not the convergence slight shift.If magnitude of voltage is identical, assemble not skew, outomatic convergence correcting finishes, and the convergence data of assembling after control microprocessor will be proofreaied and correct access from register, pass through I
2The C bus stores into and assembles control microprocessor, assembles among the EEPROM of treatment circuit, finishes the correction of auto convergence; Otherwise assemble skew is arranged, entered for the 7th step,, adjust, and turned back to for the 3rd step in unit step-length mode according to magnitude of voltage difference size.
8. convergence system according to claim 6 is characterized in that described side-play amount calculates in the following manner:
Side-play amount=(W+D) * (21-K) K is the numbering that detects the scale holding wire;
9. convergence system according to claim 6 is characterized in that described optical sensor is 4, and when laying respectively at the mid point on projection TV scuncheon four limits, described correcting value, calculate in the following manner:
Horizontal channel: horizontal translation DCH=(E1H+E4H)/2
Horizontal amplitude H1=(E3H-E2H)/2
The linear H2=of level (E3H+E2H)/2
Vertical bank V1H=(E4H-E1H)/2
V passage: vertical translation DCV=(E2V+E3V)/2
Field amplitude V1=(E1V-E4V)/2
Veritcal linearity V2=(E1V+E4V)/2
Horizontal tilt H1V=(E3V-E2V)/2 wherein implication of each variable is:
Upper side frame optical sensor (S1) horizontal offset is that E1H, vertical offset are E1V
Left frame optical sensor (S2) horizontal offset is that E2H, vertical offset are E2V
Left frame optical sensor (S3) horizontal offset is that E3H, vertical offset are E3V
Lower frame optical sensor (S4) horizontal offset is that E4H, vertical offset are E4V
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| CN 02133729 CN1414783A (en) | 2002-09-09 | 2002-09-09 | Projection television outomatic convergence correcting system |
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| CN 02133729 CN1414783A (en) | 2002-09-09 | 2002-09-09 | Projection television outomatic convergence correcting system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414983C (en) * | 2005-09-14 | 2008-08-27 | 中华映管股份有限公司 | Digital convergent correcting method for display device |
| CN102932593A (en) * | 2012-10-10 | 2013-02-13 | 深圳市航盛电子股份有限公司 | Method and system for automatic centering of camera |
| CN108848358A (en) * | 2018-05-31 | 2018-11-20 | 歌尔股份有限公司 | The modification method and device of color convergence error |
| CN111061120A (en) * | 2018-10-17 | 2020-04-24 | 英锜科技股份有限公司 | Projection device with automatic light spot correction function |
-
2002
- 2002-09-09 CN CN 02133729 patent/CN1414783A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414983C (en) * | 2005-09-14 | 2008-08-27 | 中华映管股份有限公司 | Digital convergent correcting method for display device |
| CN102932593A (en) * | 2012-10-10 | 2013-02-13 | 深圳市航盛电子股份有限公司 | Method and system for automatic centering of camera |
| CN102932593B (en) * | 2012-10-10 | 2015-04-22 | 深圳市航盛电子股份有限公司 | Method and system for automatic centering of camera |
| CN108848358A (en) * | 2018-05-31 | 2018-11-20 | 歌尔股份有限公司 | The modification method and device of color convergence error |
| CN111061120A (en) * | 2018-10-17 | 2020-04-24 | 英锜科技股份有限公司 | Projection device with automatic light spot correction function |
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