CN1169354C - Splicing structure of combined display screen and its waveform correcting device and method for image distortion - Google Patents
Splicing structure of combined display screen and its waveform correcting device and method for image distortion Download PDFInfo
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- CN1169354C CN1169354C CNB011204729A CN01120472A CN1169354C CN 1169354 C CN1169354 C CN 1169354C CN B011204729 A CNB011204729 A CN B011204729A CN 01120472 A CN01120472 A CN 01120472A CN 1169354 C CN1169354 C CN 1169354C
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- 238000005452 bending Methods 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 9
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- 239000007769 metal material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Abstract
The present invention discloses a splicing structure of a combined display screen, a waveform correcting device for image distortion of the combined display screen and a method thereof. The method of the waveform correcting device for image distortion of the combined display screen comprises the following steps: the seamless splicing combined display screen is achieved by the splicing structure; a code detecting apparatus converts a digital control signal of a microprocessor to control voltage by a waveform correcting circuit, and the control voltage controls a rectangular wave generating circuit to generate a rectangular wave for correction; a correcting voltage waveform is formed by an integrator circuit, the correcting voltage waveform forms correcting voltage by the amplification of a correcting voltage amplifying circuit, the correcting voltage carries out the distortion correction of the image distortion of each unit screen of the combined display screen, and the seamless splicing process of the combined display screen without distortion is achieved.
Description
Technical field
The present invention relates to a kind of splicing construction of display screen, especially relate to a kind of splicing construction of combined display screen.
Background technology
Along with the continuous progress of society and the fast development of technology, large-screen combination screen show video wall a large amount of be applied to various occasions, as outdoor advertising, performing art stage, Conference Room, square etc.Especially along with the continuous development of large screen back projection shadow technology and the continuous reduction of unit cost, promoted large-screen combination screen to show that the video wall The Application of Technology is universal especially greatly.
But because also there are many incomplete places in combination screen technology and splicing, so also just also there is the improved problem of all needs in this technology.Wherein relatively more outstanding a bit is: also exist tangible splicing slit between each unit screen of combined display screen, so just punish severely the whole visual effect that has influenced combined display screen, also limited the further extensive use of combined display screen.
The device that solves the aforesaid drawbacks at present has two, the one, the projection screen that convex lens screen, Fresnel Lenses screen are formed is connected with the projection screen fixed frame, and make projection light can reach screen edge, thereby eliminate the slit between each unit screen, fix with projection screen fixed card then with certain intensity, but, because the projection screen fixed card need adopt nontransparent metal material, therefore stop the projected light that projects the screen edge part, thereby made each unit platen edge part of combination screen that visible splicing seams still be arranged.
The 2nd, a kind of existing seamless combination screen splicing patent (patent No. 96108558.4), its device is that the projection screen that convex lens screen, Fresnel Lenses screen are formed is connected with the projection screen fixed frame, and make projection light can reach screen edge, thereby eliminate the slit between each unit screen.It is connected and fixed is to shield at thicker transparent medium of the back of projection screen increase to guarantee bonding strength.But, convex lens screen, Fresnel Lenses screen and common projection screen and the projection screen fixed frame of forming of thicker transparent medium need carry out special processing, transparent medium must have enough thickness simultaneously, so just caused the cost problem of higher, and, because the big thickness of transparent medium makes weight bigger, and bonding strength is reduced.
Summary of the invention
The objective of the invention is such: the splicing construction that proposes a kind of combined display screen, solve the shortcoming of above-mentioned existing combined display screen, promptly visually eliminate the slit between each unit screen of large-screen combined display screen, visually reach a kind of seamless effect in integral body, and, can realize the seamless effect of combined display screen originally with lower one-tenth.
The object of the present invention is achieved like this: a kind of combination shows splicing construction among the people, comprising:
One convex lens screen;
One Fresnel Lenses screen, bonding with described convex lens screen;
One projection screen fixed frame, the convex lens screen that is used for fixing described mutual bonding shields the projection screen of being formed with Fresnel Lenses,
And,
The assembly junction structure of above-mentioned a kind of combined display screen also comprises,
The transparent contiguous block of one dihedral, two frame are suitable with described projection screen and described projection screen fixed frame respectively.
Simultaneously,
Being connected to of the above-mentioned projection screen of being made up of convex lens screen, Fresnel Lenses screen and described transparent one of them frame of contiguous block is transparent bonding.
Being connected between above-mentioned projection screen fixed frame and described another frame of transparent contiguous block can be for transparent bonding.
The splicing construction of above-mentioned a kind of combined display screen can also comprise a mechanical connector, is arranged on outside the incident scope of projected light, is used for fixing described transparent contiguous block and described projection screen fixed frame.
Above-mentioned mechanical connector is a bolt, and it is suitable to pass the screw that is provided with on described transparent contiguous block and the described projection screen fixed frame.
The bending angle of above-mentioned transparent contiguous block should be outside the incident scope of projected light.
Above-mentioned transparent contiguous block from bending angle to being arranged to dihedral with the plane of incidence of the bonding bottom of described projection screen.
The plane of incidence of above-mentioned transparent contiguous block meets at right angles.
Above-mentioned transparent contiguous block from bending angle to being arranged to the inclined-plane with the bonding bottom of described projection screen.
Adopted above-mentioned technical scheme, just can visually reach a kind of seamless effect in integral body like this by the slit between seamless spliced each unit screen of splicing construction elimination combined display screen.Simultaneously, because its value of device that above-mentioned technical scheme adopts is not high, so the cost of cost is also lower.
Describe preferred embodiment of the present invention in detail below in conjunction with accompanying drawing,, can clearerly find out advantage of the present invention place by specific descriptions to preferred embodiment of the present invention.
Description of drawings
Fig. 1 is that the splicing construction of existing combined display screen causes each unit platen edge that the schematic diagram of visible piece is partly arranged;
Fig. 2 is the schematic diagram of the splicing construction patented technology of existing seamless combined display screen;
Fig. 3 is the schematic diagram of the splicing construction of the embodiment of the invention one;
Fig. 4 is the local enlarged diagram of the splicing construction of embodiments of the invention one;
Fig. 5 is the schematic diagram of the splicing construction of embodiments of the invention two;
Fig. 6 A is corresponding to the field sync signal waveform schematic diagram of vertical direction in the embodiment one combined display screen unit;
Fig. 6 B is the circuit correction signal schematic diagram of the additional distortion that produced of a pair of each the combined display screen unit vertical direction of embodiment;
Fig. 7 A is the local enlarged diagram of Fig. 6 B;
Fig. 7 B is another local enlarged diagram of Fig. 6 B;
Fig. 8 A is corresponding to the line synchronizing signal waveform schematic diagram of horizontal direction in the embodiment one combined display screen unit;
Fig. 8 B is the circuit correction signal schematic diagram of the additional distortion that produced of a pair of each the combined display screen unit horizontal direction of embodiment;
Fig. 9 A is the local enlarged diagram of Fig. 8;
Fig. 9 B is another local enlarged diagram of Fig. 8;
Figure 10 A is corresponding to the field sync signal waveform schematic diagram of vertical direction in the embodiment two combined display screen unit;
The circuit correction signal schematic diagram of Figure 10 B additional distortion that to be embodiment two produced each combined display screen unit vertical direction;
Figure 11 A is the local enlarged diagram of Figure 10;
Figure 11 B is another local enlarged diagram of Figure 10;
Figure 12 A is corresponding to the line synchronizing signal waveform schematic diagram of horizontal direction in the embodiment two combined display screen unit;
Figure 12 B is the circuit correction signal schematic diagram of embodiment two to each combined display screen unit horizontal additional distortion that direction produces;
Figure 13 A is the local enlarged diagram of Figure 12;
Figure 13 B is another local enlarged diagram of Figure 10;
Figure 14 is the connection schematic block diagram of the circuit of a waveform correcting device;
Figure 15 is the step block diagram of a waveform correction method.
Embodiment
As Fig. 1, convex lens screen 10, Fresnel Lenses screen 12 are formed projection screen, introduce a projection screen fixed card 16, and projection screen effectively is connected with projection screen fixed frame 14.But owing to require projection screen fixed card 16 that enough intensity will be arranged on the structure, projection screen fixed card more than 16 adopts nontransparent metal material, so stopped the projected light 18 that projects the screen edge part, caused each unit screen of combined display screen visible piece to occur in the marginal portion.
As Fig. 2, convex lens screen 10, Fresnel Lenses screen 12 are formed projection screen, projection screen effectively is connected with projection screen fixed frame 14, and makes projection light 18 can be mapped to the edge of screen; Simultaneously, a thicker transparent medium 20 is set in the back of projection screen, and with convex lens screen 10, Fresnel Lenses screen 12 and the transparent medium 20 common parts of forming joint face beveling with projection screen fixed frame 14, enough big to guarantee connection area between the two, make to obtain enough big bonding strength, can realize seamless link like this.But, the part that convex lens screen 10, Fresnel Lenses screen 12 and transparent medium 20 are formed all needs to carry out special processing with projection screen fixed frame 14, the thickness of transparent medium 20 must enough greatly also can cause cost higher simultaneously, and the thickness of transparent medium 20 makes bonding strength reduce more again.
As Fig. 3, the projection screen that the splicing construction of embodiment one is formed convex lens screen 10, Fresnel Lenses screen 12 effectively is connected with projection screen fixed frame 14, and makes projection light can be mapped to screen edge; Simultaneously, the transparent contiguous block 22 of dihedral is processed in introducing one between projection screen and projection screen fixed frame 14, be used to guarantee that both connection areas are enough big, and the plane of incidence that makes the projection light 18 that projects the edge is no more than contiguous block 22 surface parallel with projection screen, can guarantee like this distortion not to take place, avoid the image fault at screen edge place by the projected light 18 of this plane of incidence incident.
Connection between convex lens screen 10, the Fresnel Lenses screen 12 is adopted transparent bonding, and transparent fixed block 22 with can use mechanical connector 24 mechanical connections being connected of projection screen fixed frame 14, also can adopt bonding, be in outside the incident scope of projection light 18 but mechanical connection must guarantee mechanical connector 24.
As Fig. 4, incide when projection light 18 after the end face 28 of transparent contiguous block 22, owing to refraction will be in certain zone 26 skew takes place produce distortion, width that still should zone 26 is less than the pel spacing of the shown image of screen, so can not produce the visible distortion of vision on screen.The splicing construction of Fig. 3 and Fig. 4 signal is applicable to the combined display screen device of general resolution.
As Fig. 6 A, comprise the initial moment 32 and the finish time 34 that trace shows that a trace shows respectively.
As Fig. 6 B, there is the circuit correction signal 36 in an initial moment in the initial moment 32 that shows corresponding to the field trace of Fig. 6 A, corresponding to the circuit correction signal 38 that arranged a finish time finish time 34 of field trace demonstration of Fig. 6 A.
As Fig. 7 A, there is shown the initial moment 40 and the finish time 42 of the correction voltage variation in the initial moment that shows corresponding to Fig. 6 B midfield trace, the time interval 44 in two above-mentioned moment, the initial moment 40 that the correction voltage in the initial moment that field trace shows changes and a time interval 46 in the initial moment 32 of trace demonstration, the amplitude 48 of correction voltage waveform.
As Fig. 7 B, there is shown the initial moment 50 and the finish time 52 of the correction voltage variation of the finish time that shows corresponding to Fig. 6 B midfield trace, constantly time interval 54 on above-mentioned two, the time interval 56 of the finish time 34 that the finish time 52 that the correction voltage of the finish time that a trace shows changes and a trace show.
As Fig. 8 A, among the figure each unit screen of combined display screen field sync signal waveform in the horizontal direction among the embodiment one, comprise that respectively the initial moment 58 and a trace that a trace shows show for 9 the finish time 60.
As Fig. 8 B, be that each unit of combined display screen is shielded the circuit correction signal of the additional distortion that is produced in the horizontal direction among the figure, corresponding to the field trace of Fig. 8 A show initial the time be carved with a circuit correction signal 62, corresponding to a circuit correction signal 64 is arranged finish time of field trace demonstration of top.
As Fig. 9 A, there is shown the initial moment 66 and the finish time 68 of the correction voltage variation in the initial moment that shows corresponding to Fig. 8 B midfield trace, the time interval 70 in two above-mentioned moment, the time interval 72 in the initial moment 66 of the correction voltage variation in the initial moment that the initial moment 58 that field trace shows and a trace show, the amplitude 74 of correction voltage waveform.
As Fig. 9 B, there is shown the initial moment 76 and the finish time 78 of the correction voltage variation of the finish time that shows corresponding to Fig. 8 B midfield trace, the time interval 80 in two above-mentioned moment, the time interval 82 of the finish time that the finish time that the correction voltage of the finish time that a trace shows changes and a trace show.
As Fig. 5, it is the splicing construction of embodiments of the invention two, it realizes that seamless spliced method is the transparent contiguous block 30 that dihedral is processed in introducing one, at first the projection screen that convex lens screen 10, Fresnel Lenses screen 12 are formed effectively is connected with projection screen fixed frame 14, and inserts above-mentioned transparent contiguous block 30 between the two.Be connected the method that adopts transparent bonding between the projection screen that connection between convex lens screen 10, the Fresnel Lenses screen 12 and said two devices are formed and the transparent contiguous block 30, and being connected and carrying out mechanical connection by mechanical connector 24 between transparent contiguous block and the projection screen fixed frame 14, also can adopt the method for bonding, must guarantee that mechanical connector 24 is in outside the incident scope of projected light 18 when still adopting mechanical connection.The plane of incidence of projection light 18 on transparent contiguous block 30 that is projected to screen edge is set to the inclined-plane, make projection light incide the zone that the light shift that is produced behind the transparent contiguous block 30 is distributed to broad, thereby the distortion that light shift is produced reduces to enough little, just can not produce obvious visible distortion on the shown image of screen.The splicing construction of Fig. 5 signal is applicable to the combined display equipment of high-resolution.
As Figure 10 A, be that each unit screen of combined display screen comprises the initial moment 32 and the finish time 34 that trace shows that a trace shows respectively at the field sync signal waveform of vertical direction among the embodiment two among the figure.
As Figure 10 B, be to the circuit correction signal of each unit screen of combined display screen among the figure in the additional distortion that vertical direction produced, corresponding to the field trace of top show initial the time be carved with beginning circuit correction signal 84 constantly together, corresponding to the circuit correction signal 86 that arranged a finish time finish time of field trace demonstration of top.
Figure 11 A there is shown the initial moment 88 that the correction voltage in the initial moment that shows corresponding to Figure 10 B midfield trace changes, the time interval 90 in the initial moment 88 that the initial moment 32 that a trace shows and correction voltage change, the amplitude 92 of correction voltage waveform.
Figure 11 B there is shown the initial moment 94 that the correction voltage of the finish time that the correction voltage that shows corresponding to Figure 10 B midfield trace changes changes, the time interval 96 in the initial moment 94 that the finish time 34 that a trace shows and correction voltage change.
As Figure 12 A, there is shown each unit screen of combined display screen field sync signal waveform in the horizontal direction among the embodiment two, comprise the initial moment 58 and the finish time 60 that trace shows that a trace shows respectively.
As Figure 12 B, there is shown the circuit correction signal of the additional distortion that each unit of combined display screen is produced in the horizontal direction, there is the circuit correction signal 98 in an initial moment in the initial moment 32 that shows corresponding to the field trace of Figure 12 A, corresponding to the circuit correction signal 100 of 34 1 finish times of the finish time of field trace demonstration of Figure 12 A.
As Figure 13 A, there is shown the initial moment 102 of the correction voltage variation in the initial moment that shows corresponding to Figure 12 B midfield trace, the time interval 104 in the initial moment 102 that the initial moment 58 that field trace shows and correction voltage change, the amplitude 106 of correction voltage waveform.
As Figure 13 B, there is shown the initial moment 108 of the correction voltage variation of the finish time that shows corresponding to Figure 12 B midfield trace, the time interval 110 in the initial moment 108 that the finish time 60 that a trace shows and correction voltage change.
As Figure 14, be the connection layout of embodiment one and the embodiment two common waveform correction circuits that adopt.The waveform correction circuit that the present invention adopts comprises a microprocessor portion 112; One code checking machine part 114, the two connects with number bus; Also comprise a squaring circuit part 116, be used under the triggering of field sync signal or line synchronizing signal that produce the rectangular wave pulse of proofreading and correct usefulness, it is connected with code checking machine part 114 by control circuit; Also comprise an integrating circuit part 118, be used for the rectangular wave pulse of squaring circuit part 116 outputs is formed the correction voltage waveform behind integration, it is connected with code checking machine part 114 by control circuit, and connects squaring circuit part 116 at front end; Also comprise a correction voltage amplification circuits 120, be used for the correction voltage waveform of integrating circuit part 118 outputs is amplified the formation correction voltage, be used for distortion correction, it is connected with code checking machine part 114 by control circuit, and connects integrating circuit part 118 at front end.
The control voltage 1 of code checking machine part 114 outputs and control voltage 2 can change the pulse duration and the phase place of rectangular wave pulse as required, the control voltage 3 of code checking machine part 114 outputs can change the integral constant of integrating circuit part 118 as required, and and then change the width of the variation of correction signal along part, the control voltage 4 of code checking machine part 114 outputs can change the multiplication factor of correction voltage amplification circuits 120 as required, thus the control correcting value.
As the final correction voltage that produces of the waveform correction circuit of Figure 14, can directly be added to frame time base the image fault that is produced is proofreaied and correct, also can be added to scan velocity modulation coil the image fault that produces is proofreaied and correct.
As Figure 15, from figure and as can be seen in conjunction with Figure 14, this method is exported predefined digital correction signal by microprocessor, be converted to analog signal by code checking machine then, and squaring circuit, integrating circuit and correction voltage amplifying circuit are implemented control by code checking machine, squaring circuit forms square wave according to field synchronization or line synchronizing signal, and integrating circuit forms correction signal according to square wave, and the correction voltage amplifying circuit forms correction voltage and output according to correction signal.
It is to be noted; on the basis that does not break away from essence of the present invention; those of ordinary skill in the art can make various suitable distortion or replacement; such as for combined display screen based on character matrix display modes such as liquid crystal or digital micro-mirror technology; Figure 14 equivalence can be replaced with digital circuit; mode with digital technology realizes; and the digital correction signal that is produced is used for correction to the display pixel address; but; all these distortion or replacement all should belong to protection scope of the present invention.
Claims (6)
1, a kind of splicing construction of combined display screen comprises
One convex lens screen;
One Fresnel Lenses screen, bonding with described convex lens screen;
One projection screen fixed frame, the convex lens screen that is used for fixing described mutual bonding shields the projection screen of being formed with Fresnel Lenses, it is characterized in that:
The splicing construction of described a kind of combined display screen also comprises,
The transparent contiguous block of one dihedral, two frame are suitable with described projection screen and described projection screen fixed frame respectively;
Being connected to of the described projection screen of being made up of convex lens screens, Fresnel Lenses screen and described transparent one of them frame of contiguous block is transparent bonding;
Being connected between described projection screen fixed frame and described another frame of transparent contiguous block can be for transparent bonding, perhaps can use a mechanical connector outside the incident scope that is arranged on projected light to fix described transparent contiguous block and described projection screen fixed frame.
2, the splicing construction of a kind of combined display screen according to claim 1 is characterized in that: described mechanical connector is a bolt, and it is suitable to pass the screw that is provided with on described transparent contiguous block and the described projection screen fixed frame.
3, the splicing construction of a kind of combined display screen according to claim 1 is characterized in that: the bending angle of described transparent contiguous block should be outside the incident scope of projected light.
4, require the splicing construction of 3 described a kind of combined display screens as requested, it is characterized in that: described transparent contiguous block from bending angle to being arranged to dihedral with the plane of incidence of the bonding bottom of described projection screen.
5, the splicing construction of a kind of combined display screen according to claim 4 is characterized in that: the plane of incidence of described transparent contiguous block meets at right angles.
6, the splicing construction of a kind of combined display screen according to claim 3 is characterized in that: described transparent contiguous block from bending angle to being arranged to the inclined-plane with the bonding bottom of described projection screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011204729A CN1169354C (en) | 2001-07-17 | 2001-07-17 | Splicing structure of combined display screen and its waveform correcting device and method for image distortion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011204729A CN1169354C (en) | 2001-07-17 | 2001-07-17 | Splicing structure of combined display screen and its waveform correcting device and method for image distortion |
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| Publication Number | Publication Date |
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| CN1396768A CN1396768A (en) | 2003-02-12 |
| CN1169354C true CN1169354C (en) | 2004-09-29 |
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| CNB011204729A Expired - Fee Related CN1169354C (en) | 2001-07-17 | 2001-07-17 | Splicing structure of combined display screen and its waveform correcting device and method for image distortion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1767561B (en) * | 2005-11-09 | 2010-11-17 | 阮立山 | Method for carrying out opening or amplification for font on handset screen |
| CN113655260B (en) * | 2021-08-18 | 2024-07-12 | 合肥联宝信息技术有限公司 | Picture processing method and device |
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Granted publication date: 20040929 Termination date: 20130717 |