CN2365841Y - Compensating scanner for colourful projector - Google Patents
Compensating scanner for colourful projector Download PDFInfo
- Publication number
- CN2365841Y CN2365841Y CN 99235716 CN99235716U CN2365841Y CN 2365841 Y CN2365841 Y CN 2365841Y CN 99235716 CN99235716 CN 99235716 CN 99235716 U CN99235716 U CN 99235716U CN 2365841 Y CN2365841 Y CN 2365841Y
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- coil
- projection tube
- primary colours
- field
- scan
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Abstract
The utility model relates to a compensating scanning device for a colorful projector, which comprises a left, a middle and a right primary-color projection tubes, wherein, the line-field scanning coils of the three projection tubes are connected in series or parallel, and are connected with a line-field scanning circuit; the rear part of a screen of the projection tube is provided with a rectangular magnet frame; the four edges of the magnet frame are provide with line-field scanning compensating coils which has different magnetic-field directions and magnetic-field distribution according to pre-distorted images desired by each primary-color projection tube; each compensating coil is excited by the same line-field scanning signal to realize the set of a standard pre-distorted image. The utility model has the advantages of simple structure, reliable operation, small magnetic disturbance on an electronic main lens, large applicable selecting range to a scanning circuit, etc.
Description
The utility model belongs to a kind of compensation scanner of color projector.
Trinoscope is to make a left side put the primary colours projection tube, mid-primary colours projection tube, the right side put the shown picture overlapping of primary colours projection tube be incident upon one vertically to screen on, be compounded to form a width of cloth chromatic image, because during three projection tube projected image, its projection axis can not overlap, that is to say that each position of screen video to the distance of every primary colours projection tube and the distance of each position to three of screen video primary colours projection tube is different, so same video on the screen, image for three primary colours projection tubes, its visual enlargement ratio is different, like this if three primary colours projection tubes shown be identical rectangle image, the three primary colors video that is projeced on the screen through optical lens must be the video of not superimposed and serious distortion.So throw a width of cloth three primary colors video fully superimposed a certain proportion of rectangle colorful video arranged, just need in advance the image of tricolor pipe to be arranged to the predistortion image, the shown image of wherein mid-primary colours projection tube should be one and go up dredge close down vertical linearity predistortion and isosceles wide at the top and narrow at the bottom and fall trapezoidal line amplitude predistortion image (referring to the 3-2 among Fig. 3), a left side is put the shown image of primary colours projection tube and is dredged close down vertical linearity and wide at the top and narrow at the bottom falling the trapezoidal line amplitude predistortion image except should be, also requiring is the multiple predistortion image (referring to Fig. 3-1) of the wide horizontal trapezoidal field amplitude predistortion in the thin line linearity in the left close right side and the left narrow right side, and the shown image of primary colours projection tube is put on the right side should put axially symmetry (referring to Fig. 3-3) of the shown image of primary colours projection tube with a left side.Such three width of cloth standard predistortion images are projected on the screen, can obtain fully overlapping a certain proportion of rectangle colorful image that has shown in Figure 4, so the convergence imaging procedures of trinoscope is a more complicated.Standard predistortion image shown in Figure 3 is set is by adjusting the row of three primary colours projection tubes respectively to prior art always for a long time, electric current in the sub-scanning deflecting coil of field is realized, there is recombination current by a plurality of waveforms to act on three projection tubes respectively, the employing digital circuit is also arranged, disclosed as the CN86106749A patent, adopt the arbitrary access register, the corrected value at each position of memory image, during work by micro processor controls with transfer corrected value in the register, and drive the row of three projection tubes in view of the above respectively, field sub-scanning deflecting coil is realized the setting of above-mentioned standard predistortion image.These technology circuit complex structures, non-linear element is many, and circuit parameter easily changes with temperature and service time, and reliability is low, the cost height.The disclosed technology of 97119729 patent applications is the row with three primary colours picture tubes, the field scan deflecting coil is head and the tail series connection and row mutually respectively, field-scanning circuit connects, and make a left side, the field-scanning coil left side of right primary colours picture tube, the right side coil turn is different assembles adjustment to image, this technical pattern is simple, cost is low, but its three row, the normal scanning deflection coil structure in field is inequality, the use of only should connecting, unsuitable in parallel the use, so be unsuitable under the lower situation of scanning circuit output voltage, using, limited its scope of application, the irregular magnetic field that also exists its scanning deflection coil to produce simultaneously is easy to electron gun main lens is produced the deficiency of disturbing.
The utility model aim to provide a kind of simple in structure, cost is low,, reliable operation little to the electron gun main lens magnetic interference, scan characteristic is good and to the compensation scanner of the big color projector of the suitable range of choice of scanning circuit and projection tube.
The technical scheme that realizes above-mentioned purpose is (referring to implementing illustration): this device comprises the mid-primary colours projection tube (V that is located at vertical screen dead ahead, left side, right side respectively
2), primary colours projection tube (V is put on a left side
1), primary colours projection tube (V is put on the right side
3), it is characterized in that: be positioned at electron gun position, three projection tube cone rear portions the normal scanning deflection coil (L of row
7), (L
8), (L
9) head and the tail series connection mutually, or link with line-scan circuit (M) output after the parallel connection of mutual first initial and end tail, receive the line scanning output signal, a normal scanning deflection coil (L
1), (L
2), (L
3) head and the tail series connection mutually, or link received field scanning output signal after the parallel connection of mutual first initial and end tail with field-scanning circuit (N) output; Normal scanning deflection coil (the L of described row mid-, that put on a left side, projection tube is put on the right side
7), (L
8), (L
9) the architectural feature unanimity, the normal scanning deflection coil (L in the field that put on mid-a, left side, projection tube is put on the right side
1), (L
2), (L
3) architectural feature is also consistent;
This device also is provided with line scanning bucking coil and field scan bucking coil, and its structure is: put on a described left side, mid-, the right side put the projection tube fluorescent screen slightly outside the back four sides a rectangle magnet frame (Q parallel with corresponding fluorescent screen, that make with permeability magnetic material is set respectively
1), (Q
2), (Q
3), be wound with the coil of certain number of turn on the rectangle magnet frame four limit skeletons, the coil (L of vertical coiling on two magnetic frames
10), (L
11), (L
12) be respectively the line scanning bucking coil of corresponding projection tube, the coil (L of level coiling on two magnetic frames
4), (L
5), (L
6) be respectively the field scan bucking coil of corresponding projection tube, each magnet frame is positioned at two mutual serial or parallel connections of the line scanning bucking coil on the vertical frame and connects, field scan bucking coil on the two horizontal frames is that mutual serial or parallel connection connects the line scanning bucking coil (L of three projection tubes
10), (L
11), (L
12) connect with the normal scanning deflection coil serial or parallel connection of the row of aforesaid three serial or parallel connections behind the serial or parallel connection, the loop is in the line-scan circuit output, the field scan bucking coil (L of three projection tubes
4), (L
5), (L
6) connect with the normal scanning deflection coil serial or parallel connection in the field of aforesaid three serial or parallel connections behind the serial or parallel connection, the loop is in the field-scanning circuit output;
Mid-primary colours projection tube rectangle magnet frame (Q
2) left and right two vertically to the coiling direction of line scanning bucking coil on the frame and the field scan bucking coil of upper and lower two levels on frame all with by its magnetic direction that electric current is formed respectively with corresponding row, often a scanning deflection coil magnetic direction consistent (just compensating) is as the criterion; Primary colours projection tube rectangle magnet frame (Q is put on a left side
1) a left side vertically to the coiling direction of the up scan compensation coil of frame with magnetic direction that electric current is formed and the normal scanning deflection coil (L of corresponding row by it
7) magnetic direction opposite (negative compensation) is as the criterion, right vertically to the coiling direction of the up scan compensation coil of frame then with the normal scanning deflection coil (L of corresponding row
7) magnetic direction unanimity (just compensating) is as the criterion the field scan bucking coil (L of upper and lower level on frame
4) the coiling direction all with magnetic direction that electric current is formed and the normal scanning coil (L of corresponding fields by it
1) magnetic direction is consistent is as the criterion, and its coil distribution is a left side and dredges right close; Primary colours projection tube rectangle magnet frame (Q is put on the right side
3) on the scan compensation loop construction be to be that symmetry axis is put primary colours projection tube scan compensation loop construction symmetry with an above-mentioned left side with mid-primary colours projection tube.
The operation principle of this device is: put under primary colours projection tube field, the effect of line scanning deflection current on a left side, primary colours projection tube magnet frame Q is put on the left side of said structure
1Right close field scan bucking coil is dredged on two levels left side on frame can produce weak right strong magnetic field, a left side, the two vertical line scanning bucking coil left sides on frame are negative compensation, the right is for just compensating, be positioned at the slightly row of rear of fluorescent screen like this, field scan bucking coil magnetic field and the corresponding row that is positioned at the electron gun position, the acting in conjunction of field deflection coil magnetic field makes a left side put the primary colours projection tube and forms thin close vertical linearity distortion down in scanning beam, wide at the top and narrow at the bottom fall trapezoidal line amplitude distortion, the line linearity distortion that dredge on the close right side, a left side, the predistortion image (referring to Fig. 3-1) that a left side wide multiple like this distortion of horizontal trapezoidal field amplitude distortion in the narrow right side is composited; The symmetrically arranged right side is put the primary colours projection tube and then can be formed and dredge close down vertical linearity distortion, the predistortion image (referring to Fig. 3-3) that falls the symmetry that the wide multiple like this distortion of horizontal trapezoidal field amplitude distortion in line linearity distortion, a right narrow left side that trapezoidal line amplitude distortion, a right close left side dredge is composited wide at the top and narrow at the bottom; The mid-primary colours projection tube of said structure forms and dredges close down vertical linearity predistortion, the predistortion image (referring to Fig. 3-2) that isosceles trapezoid line amplitude distortion wide at the top and narrow at the bottom is composited on one.The predistortion image of three projection tubes projects on the vertical screen by optical lens, can the overlapping a certain proportion of rectangle colorful image that has that is combined into as shown in Figure 4.
The advantage of this device is:
1, this device row, field scan bucking coil are arranged near fluorescent screen, away from the position of rear portion electron gun, so reduced the interference of non-regular magnetic field that the scan compensation coil produced, applicable to the externally convergence adjustment of the electromagnetism complex focusing projection tube of magnetic-field-sensitive to electron gun electronics main lens.
2, compare with 97119729 patent applications, the scanning deflection coil architectural characteristic difference of three projection tubes of this patent application, use unsuitable in parallel the use so only should connect, and the row of this device, the field scan compensation is what to be finished by the bucking coil that is provided with outside scanning deflection coil, so row of three projection tubes, field scan deflecting coil architectural characteristic is identical, connect row after so not only can connecting, field-scanning circuit, and under the lower situation of projection tube and scanning circuit output voltage, also can connect row after the parallel connection, field-scanning circuit has improved this device to being suitable for the range of choice of projection tube and scanning circuit.
3, this device is by row, normal scanning coil in field and scan compensation coil thereof are realized the predistortion setting of each primary colours projection tube image, the predistortion adjustment only needs can be realized by the different argument structure of scan compensation coil itself, cancel prior art and adjusted the set complex electronic circuit of predistortion, owing to need not adopt active element, so Heat stability is good, can reduce the influence that the image after the convergence is changed by ambient temperature and circuit element parameter, and not need to adjust the convergence tracking system that circuit easily causes the different partially cost costliness that will introduce of convergence characteristics because of predistortion is set.
4, this device row, field scan bucking coil are to be connected to same corresponding row, field-scanning circuit with corresponding row, field deflection coil by relation in parallel or series connection, the synchronism of obtaining required separately row, field scan deflection compensated power is good, has improved the consistency of scanning of image.
5, simple in structure, cost is low.
Description of drawings:
Fig. 1, the utility model embodiment electrical block diagram
V
1-left primary colours projection tube V
2-middle primary colours projection tube V
3-right primary colours projection tube
L
1, L
2, L
3-normal scanning deflection coil L
4, L
5, L
6-field scan bucking coil
L
7, L
8, L
9The normal scanning deflection coil L of-row
10, L
11, L
12-line scanning bucking coil
M-line-scan circuit N-field-scanning circuit O-high-voltage rectifier
Row, field scan bucking coil structural representation among Fig. 2, Fig. 1
Q
1-be enclosed within a left side to put primary colours projection tube V
1Bucking coil magnet frame behind the fluorescent screen
Q
2-be enclosed within mid-primary colours projection tube V
2Bucking coil magnet frame behind the fluorescent screen
Q
3-be enclosed within the right side to put primary colours projection tube V
3Bucking coil magnet frame behind the fluorescent screen
The standard predistortion image of Fig. 3, three primary colors projection tube
3-1 puts on a left side in the primary colours projection tube and the grid signal to be compensated scanning adjusts the shown standard in back and lose in advance
Very visual
3-2 compensates the shown standard in scanning adjustment back to the grid signal and loses in advance in mid-primary colours projection tube
Very visual
3-3 puts on the right side in the primary colours projection tube and the grid signal to be compensated scanning adjusts the shown standard in back and lose in advance
Very visual
Fig. 4, three standard predistortion image projections shown in Figure 3 are in the standard that vertically is composited on screen
R, G, B image
Embodiment
Present embodiment comprises the mid-primary colours projection tube V that is arranged on vertically to the screen dead ahead
2And respectively its left side, the right side the left and right primary colours projection tube V that puts
1, V
3, the screen of three projection tubes is 180 millimeters (7 inches), and 55 ° of electron guns of deflection angle are that heavy caliber BPF Combined Electrostatic focuses on R, G, B three primary colors projection tube, its primary colours projection tube V
1, V
2, V
3Negative electrode receive R (redness), G (green), B (blueness) vision signal respectively.
The normal scanning deflection coil L of the row of each primary colours projection tube
7, L
8, L
9First parallel connection end connects L with the signal output part of line-scan circuit M mutually
7, L
8, L
9The line scanning bucking coil L of head and the tail coupled in series on tail tail parallel connection end and three the primary colours projection tubes
10, L
11, L
12After the coupled in series, the loop is in line-scan circuit M, with the line scan signals of synchronous reception line-scan circuit output, and obtains normal scan deflection power of the required row of each primary colours projection tube and line scanning compensation power with this circuit signal;
The normal scanning deflection coil L in the field of each primary colours projection tube
1, L
2, L
3After the head and the tail coupled in series, an end connects with the signal output part of field-scanning circuit N, the field scan bucking coil L of coupled in series from beginning to end on the other end and three the primary colours projection tubes
4, L
5, L
6Coupled in series, loop be in field-scanning circuit N, with the field scan signal of synchronous received field scanning circuit output, and obtains the required row of each primary colours projection tube a normal scan deflection power and a field scan compensation power with this circuit signal.
Above-mentioned line-scan circuit M and field-scanning circuit N are identical with row, field-scanning circuit structure in ordinary television receiver or the computer monitor.Referring to Fig. 1, the first anode of three primary colours projection tubes, high-voltage anode meet high-voltage rectifier O after the parallel connection respectively, to obtain identical first anode voltage and identical high-voltage anode voltage, the filament of three primary colours projection tubes also obtains identical filament voltage by (from C, D 2 points) after the parallel connection, the second plate of three primary colours projection tubes and focusing electrode are by after independent the adjustment, obtain required separately second plate voltage and focus voltage from high-voltage rectifier respectively.
Fig. 2 is row, field scan bucking coil structural representation, Q
1, Q
2, Q
3Be the rectangle magnet frame made from the high permeability material ferrite, this example is that to adopt specification be the closed magnet frame that the cylindric ferrite of Φ 10mm is made, and the inside dimensions of magnet frame is slightly larger than the outer four side sizes of institute's aglucon look projection tube fluorescent screen.
Q
2Be to be enclosed near mid-primary colours projection tube V
2Position, the fluorescent screen back side and the scan compensation coil magnet frame parallel with fluorescent screen, upper and lower two levels of magnet frame are wound with mid-primary colours projection tube field scan bucking coil L on frame
5, two parts L of this routine upper and lower frame coiling
5Coil is a coupled in series, and under the effect of mid-primary colours projection tube field scan deflection current, the magnetic field that this two parts coil produces is all identical with the magnetic direction that the corresponding fields scanning deflection coil produces, and forms just to compensate; Left and right two vertically are wound with mid-primary colours projection tube line scanning bucking coil L on frame
11, two parts L of this routine left and right frame coiling
11Coil is a coupled in series, and under the scan deflection function of current of being expert at, the magnetic field that this two parts coil produces is all identical with the magnetic direction that the corresponding row scanning deflection coil produces, and forms just to compensate; Field scan bucking coil L
5With line scanning bucking coil L
11The adjustment of coil distribution all can form the mid-primary colours projection tube of the standard shown in Fig. 3-2 predistortion image after on the screen and is as the criterion to be projeced into vertically.
Q
1Be to be enclosed near putting primary colours projection tube V in a left side
1Position, the fluorescent screen back side and the scan compensation coil magnet frame parallel with fluorescent screen, upper and lower two levels of magnet frame are wound with a left side and put primary colours projection tube field scan bucking coil L on frame
4, two parts L of this routine upper and lower frame coiling
4Coil is a coupled in series, put under the effect of primary colours projection tube field scan deflection current on a left side, the magnetic field that this two parts coil produces is all identical with the magnetic direction that the corresponding fields scanning deflection coil produces, form and just compensate, it is thin right close that its coil turn distribution is a left side, to form the magnetic field that tends to become strong gradually from left to right; Left and right two vertically are wound with a left side on frame puts primary colours projection tube line scanning bucking coil L
10, two parts L of this routine left and right frame coiling
10Coil is a coupled in series, under the scan deflection function of current of being expert at, the magnetic field that coil produces on the left frame is opposite with the magnetic direction that the corresponding row scanning deflection coil produces, form negative compensation, the magnetic field that coil produces on the left frame is identical with the magnetic direction that the corresponding row scanning deflection coil produces, form and just compensate, magnetic field and corresponding row scanning deflection coil magnetic field superposition that above line scan compensation coil forms, form promptly that left row amplitude is proportional to be reduced gradually, the proportional line linearity fault image that increases gradually of the line amplitude on right side; On this basis, whole adjust coil density ratio on the magnet frame, adjust principle and be to be projeced into and vertically behind screen, can form the standard left side shown in Fig. 3-1 and put primary colours projection tube predistortion image and be as the criterion.
Q
3Be to be enclosed near putting primary colours projection tube V in the right side
3Position, the fluorescent screen back side and the scan compensation coil magnet frame parallel with fluorescent screen, upper and lower two levels of magnet frame are wound with the right side and put primary colours projection tube field scan bucking coil L on frame
6, two parts L of this routine upper and lower frame coiling
6Coil is a coupled in series, put under the effect of primary colours projection tube field scan deflection current on the right side, the magnetic field that this two parts coil produces is all identical with the magnetic direction that the corresponding fields scanning deflection coil produces, form and just compensate, it is close that its coil turn distribution is the right left side of dredging, to form the magnetic field from right-to-left tends to become strong gradually; Left and right two vertically are wound with the right side on frame puts primary colours projection tube line scanning bucking coil L
12, two parts L of this routine left and right frame coiling
12Coil is a coupled in series, under the scan deflection function of current of being expert at, the magnetic field that coil produces on the left frame is opposite with the magnetic direction that the corresponding row scanning deflection coil produces, form negative compensation, the magnetic field that coil produces on the left frame is identical with the magnetic direction that the corresponding row scanning deflection coil produces, form and just compensate, magnetic field and corresponding row scanning deflection coil magnetic field superposition that above line scan compensation coil forms, form promptly that right side line amplitude is proportional to be reduced gradually, the proportional line linearity fault image that increases gradually of the line amplitude in left side; On this basis, whole adjust coil density ratio on the magnet frame, adjust principle and be to be projeced into and vertically behind screen, can form the standard right side shown in Fig. 3-3 and put primary colours projection tube predistortion image and be as the criterion.
A among Fig. 2
1, a
2Termination field scan compensation pumping signal (field deflection coil or field-scanning circuit), b
1, b
2Connect line scanning compensation pumping signal (line deflector coil or line-scan circuit).
After, field scan capable by said structure scan compensation coil compensates, standard predistortion image 3-1,3-2, the 3-3 that left, center, right is put each self-forming of primary colours projection tube through the optical lens projection in vertically on screen, can form as shown in Figure 4 the superimposed colored video of a certain proportion of rectangle three primary colors arranged.
The utility model is enclosed within three row, field scan deflecting coils on the projection tube electron gun can distinguish the head and the tail coupled in series, also can distinguish the parallel connection of first initial and end tail.
The utility model is enclosed within row, the field scan bucking coil of three projection tube fluorescent screens summary rears can distinguish the head and the tail coupled in series, also can distinguish the parallel connection of first initial and end tail.
The utility model is positioned at the vertical two parts line scanning bucking coils on edge of two of each magnet frames can coupled in series, but also parallel connection, and being positioned at two parts field scan bucking coil of two levels of each magnet frame on edge can coupled in series, but also parallel connection.
The utility model scan compensation coil can with corresponding normal scanning deflection coil coupled in series after connect scanning circuit, but also connect scanning circuit after the parallel connection.
In parallel or the series connection of above-mentioned coil can be according to the output voltage of projection tube and supporting scanning circuit, and output current is selected, and output voltage is big, and coil should adopt the series connection form, and output current is big, and coil should adopt parallel form.
Claims (1)
1, the compensation scanner of color projector comprises the mid-primary colours projection tube (V that is located at vertical screen dead ahead, left side, right side respectively
2), primary colours projection tube (V is put on a left side
1), primary colours projection tube (V is put on the right side
3), it is characterized in that: be positioned at electron gun position, three projection tube cone rear portions the normal scanning deflection coil (L of row
7), (L
8), (L
9) head and the tail series connection mutually, or link a normal scanning deflection coil (L after the parallel connection of mutual first initial and end tail with line-scan circuit (M) output
1), (L
2), (L
3) head and the tail series connection mutually, or link with field-scanning circuit (N) output after the parallel connection of mutual first initial and end tail; Normal scanning deflection coil (the L of described row mid-, that put on a left side, projection tube is put on the right side
7), (L
8), (L
9) the architectural feature unanimity, the normal scanning deflection coil (L in the field that put on mid-a, left side, projection tube is put on the right side
1), (L
2), (L
3) architectural feature is also consistent;
The scan compensation loop construction that this device is provided with is: put on a described left side, mid-, the right side put the projection tube fluorescent screen slightly outside the back four sides a rectangle magnet frame (Q parallel with corresponding fluorescent screen, that make with permeability magnetic material is set respectively
1), (Q
2), (Q
3), be wound with the coil of certain number of turn on the rectangle magnet frame four limit skeletons, the coil (L of vertical coiling on two magnetic frames
10), (L
11), (L
12) be respectively the line scanning bucking coil of corresponding projection tube, the coil (L of level coiling on two magnetic frames
4), (L
5), (L
6) be respectively the field scan bucking coil of corresponding projection tube, each magnet frame is positioned at two mutual serial or parallel connections of the line scanning bucking coil on the vertical frame and connects, field scan bucking coil on the two horizontal frames is that mutual serial or parallel connection connects the line scanning bucking coil (L of three projection tubes
10), (L
11), (L
12) connect the field scan bucking coil (L of three projection tubes with the normal scanning deflection coil serial or parallel connection of the row of aforesaid three serial or parallel connections behind the serial or parallel connection
4), (L
5), (L
6) connect with the normal scanning deflection coil serial or parallel connection in the field of aforesaid three serial or parallel connections behind the serial or parallel connection;
Mid-primary colours projection tube rectangle magnet frame (Q
2) left and right two vertically to the coiling direction of line scanning bucking coil on the frame and the field scan bucking coil of upper and lower two levels on frame all with by its magnetic direction that electric current is formed respectively with corresponding row, often the scanning deflection coil magnetic direction is consistent is as the criterion; Primary colours projection tube rectangle magnet frame (Q is put on a left side
1) a left side vertically to the coiling direction of the up scan compensation coil of frame with magnetic direction that electric current is formed and the normal scanning deflection coil (L of corresponding row by it
7) magnetic direction is as the criterion on the contrary, right vertically to the coiling direction of the up scan compensation coil of frame then with the normal scanning deflection coil (L of corresponding row
7) magnetic direction is consistent is as the criterion the field scan bucking coil (L of upper and lower level on frame
4) the coiling direction all with magnetic direction that electric current is formed and the normal scanning coil (L of corresponding fields by it
1) magnetic direction is consistent is as the criterion, and its coil distribution is a left side and dredges right close; Primary colours projection tube rectangle magnet frame (Q is put on the right side
3) on the scan compensation loop construction be to be that symmetry axis is put primary colours projection tube scan compensation loop construction symmetry with an above-mentioned left side with mid-primary colours projection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99235716 CN2365841Y (en) | 1999-04-06 | 1999-04-06 | Compensating scanner for colourful projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99235716 CN2365841Y (en) | 1999-04-06 | 1999-04-06 | Compensating scanner for colourful projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2365841Y true CN2365841Y (en) | 2000-02-23 |
Family
ID=34023635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99235716 Expired - Fee Related CN2365841Y (en) | 1999-04-06 | 1999-04-06 | Compensating scanner for colourful projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2365841Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589538C (en) * | 2002-06-12 | 2010-02-10 | 奥普提克斯晶硅有限公司 | Short throw projection system and method |
-
1999
- 1999-04-06 CN CN 99235716 patent/CN2365841Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589538C (en) * | 2002-06-12 | 2010-02-10 | 奥普提克斯晶硅有限公司 | Short throw projection system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |