CN100484211C

CN100484211C - Large screen whole screen rear projection display method

Info

Publication number: CN100484211C
Application number: CNB2005100412553A
Authority: CN
Inventors: 黄福泉
Original assignee: 黄福泉
Current assignee: Huainan Mining Group Co Ltd
Priority date: 2005-07-29
Filing date: 2005-07-29
Publication date: 2009-04-29
Anticipated expiration: 2025-07-29
Also published as: CN1719886A

Abstract

This invention relates to large screen rear-projection display method of a total screen. A pair of projectors is applied, each of them outputs the right half and left of the original image to be processed optically and electronically to couple their optical edges to an image to get a complete image with its unit area light flux and the unit area pixel increased by one time. Said optical and electronic process includes that the projection must be put at the center of pair of projectors and optical focus of the projector screen, the size of the screen must be matched with the set direction of the screen. A double-head display card, a video collection card and a RGB collection card adjusting output resolution and image rotation freely should be mounted on the computer sending image signals to the projector to realize coupling of the optical edges of the two parts to get a total screen display of single screen or double screen splicing.

Description

A kind of large screen whole screen rear projection display method

Technical field

The present invention relates to the rear-projection Display Technique, particularly a kind of large screen whole screen rear projection display method comprises that the whole screen of single screen shows and the whole screen in the synthetic splicing of multi-screen image back shows, belongs to light, electronic technology field.

Background technology

The rear-projection demonstration mainly comprises rear projection screen and projector's two aspect problems, the rear projection screen aspect: from electronic splicing rear-projection technology appearred in 20th century with the eighties since, it be not any difficult matter that curtain wall is looked in the rear-projection of adopting the mode of splicing to obtain tens of square metres even up to a hundred square metres display areas.But its splicing slit is still inevitable.The projector aspect: since 21 century, along with the development of LCD (liquid crystal) and DLP (Digital Light Processor) technology, the projector of the above luminous flux of 10,000 lumens is unrare.But the projector of these huge luminous fluxes is all relatively more expensive, and in hundreds thousand of even up to a million yuans, this obviously is difficult to accept to the general user easily.At present, general commercial projector, particularly its output light flux of monolithic DLP machine is no more than the 3000ANSI lumen, and this is for the whole screen rear-projection more than 120 inches, and obviously some is not enough.Address this problem, the one, the projector, particularly three DLP machines that adopt bigger luminous flux output, but as described above, costing an arm and a leg makes it be difficult to promote; The 2nd, the way of employing two-shipper even three machine light path superpositions, but generally the superposition effect of its image edge is relatively poor, and when particularly adopting the light path folding, this is owing to visual chip, speculum, camera lens machining accuracy cause inadequately.More than the summary, prior art has following method: (1) optical image Superposition Method: with the same optical image of two projectors output (image size is the same, pixel is the same, content the same) superposition together, obtain the image that the same size with former image, the same pixel, the same content and brightness double.Though brightness (luminous flux) has increased, resolution does not increase (Fig. 1); (2) optical image splicing method: respectively export the left side and the right-hand part of an image with two projectors, be stitched together then, obtain a complete image.Brightness (luminous flux) does not increase, and total resolution has increased by one times, and total display area has also increased (Fig. 2).

Summary of the invention

The invention provides a kind of large screen whole screen rear projection display method, in the hope of reaching following purpose:

(1) the whole screen rear-projection that had not only improved luminous flux but also improved resolution shows;

(2) under above-mentioned prerequisite, adopt luminous flux output smaller again, thereby the cheap projector of price comparison, reduce cost.

Above-mentioned purpose of the present invention is achieved in that a kind of large screen whole screen rear projection display method, this method is to be coupled as basic thought in pairs, promptly adopt a pair of identical projector, every projector exports the left side and the right-hand part of former image, after optics and electron process, with the imaging that intercouples of the optical edge of left side and right-hand part image, thereby obtain the complete image (Fig. 3) that a unit are luminous flux and unit are pixel all double, said optics and electron process comprise that the placement of projector must be the optical centre of every pair of projector and the optical focus of rear projection screen, the placement direction coupling of screen size ratio and screen; The transmission picture intelligence is equipped with commercially available double end video card, video frequency collection card and the RGB capture card that can regulate output resolution and image rotation arbitrarily at least to the computer of projector, by regulating the output resolution and the visual anglec of rotation of double end video card, the optical edge of realization left side and right-hand part image intercouples, and obtains whole screen demonstration of single screen or double screen splicing, whole screen displayed image.Can adopt commercially available common projector, two-shipper is vertically placed on same level; Adopt commercially available single Fei Nieer focus, length and width vertically to place the back than two rear projection screens of 4: 3 and be spliced into 6: 4 whole screens in Chang Bianchu, every projector's correspondence is projected to the whole screen of half block; Is that the center of circle is rotated counterclockwise 90 ° with the Fei Nieer focus of each screen with computer double end video card all corresponding to the image of each split screen, obtains the whole screen displayed image of the bonding or splicing-in of double screen.Preferably adopt commercially available optical centre to be positioned at the DLP projector at visual lower limb center, two-shipper is vertically placed on same level; Adopt a commercially available single Fei Nieer focus, the rear projection screen horizontal positioned of length and width than 4: 3, the optical focus of projector is focused on the Fei Nieer focus of rear projection screen; With each image of computer double end video card is that the center of circle is rotated counterclockwise 90 ° with the Fei Nieer focus of screen all, and the full frame resolution after the output resolution of regulating the double end video card and the two-shipper coupling is close, obtains single screen image connection, puts in order and shield displayed image.Use as the expansion of the inventive method, can adopt earlier after the prior art two-shipper optical image Superposition Method, and then be coupled in pairs with one or more same units as a coupling unit.Can a pair of two-shipper coupling rear projection screen be the unit also, multi-unit assembled again.

Advantage of the present invention and effect: can obtain luminous flux and double, the composite image that resolution (more properly saying it is pixel) also doubles." DLP projector (unit resolution 1400 * 1050), we just can realize that 2100 * 1400 the whole screen of ultrahigh resolution shows if adopt commercially available 0.9.The projector of this resolution, except adopting the projector of ILA technology, still there is not other commercially available projection function to accomplish, and its price, for example make one 200 inches whole screens, as long as with two output light fluxs be the 6000ANSI lumen 0.9 " DLP projector (1400 * 1050) can realize the brightness and the whole screen demonstration of 2100 * 1400 ultrahigh resolution of every square metre of average 1000ANSI lumen.As adopt the WA200 of DNP " to shield, can obtain the preceding luminous exitance of screen (or crying " shielding preceding brightness ") of 400cd/.And its two-shipper price is only surplus in the of 30 ten thousand, less than 1/3 of three DLP projectors of 12000ANSI lumen of a BARCO.

Description of drawings

Figure 1A, 1B are respectively prior art optical image Superposition Method optical arrangement and image effect principle schematic;

Fig. 2 A, 2B are respectively prior art optical image splicing method optical arrangement and image effect principle schematic;

Fig. 3 A, 3B are respectively that the present invention's whole screen of single screen that is coupled in pairs shows implementation result and image effect principle schematic;

Fig. 4 A-4F is the paired coupling optical principle schematic of the present invention;

Fig. 5 is the paired coupling circuit connection side of a present invention block diagram;

Fig. 6 is that double screen splicing of the present invention, whole screen show implementation result figure;

Fig. 7 is the present invention elder generation two-shipper optical image superposition implementation result figure that is coupled in pairs again.

Embodiment

Referring to Figure 1A, the same optical image of two W of projector output (image size is the same, pixel is the same, content the same) is to the rear projection screen 1 with Fei Nieer focus 2, superposition obtains the image that the same size with former image, the same pixel, the same content and brightness double together.Though brightness (luminous flux) has increased, resolution does not increase.The two-shipper signal demand reverses through about projector, and the onlooker just can see correct image such as Figure 1B before the screen.

Fig. 2 A, 2B respectively export on the Fei Nieer focus screen that the left side of an image and right-hand part to two piece be 4: 3 with two W of projector (keeping flat), adopt the double end video card, are stitched together then, obtain a complete image.Brightness (luminous flux) does not increase, and total resolution has increased by one times, and total display area has also increased.If supposition projector pixel resolution is 1024 * 768, double end video card resolution is 2048 * 768, and then the graphic level direction of Xian Shiing has been elongated one times, has been serious distortion obviously, and existing full frame ratio is 8: 3.Equally, the two-shipper signal demand reverses through about projector, and the onlooker just can see correct image before the screen.

Referring to Fig. 3 A, 3B, adopt a pair of optical centre in the middle of the projected graphics lower edge identical commercially available civilian DLP projector and the common Fei Nieer focus of monolithic at the rear projection screen of screen center and commercially available a kind of double end video card that makes arbitrary output pattern half-twist of double end output, simultaneously the resolution of double end video card is adjusted into 1536 * 1024 or close 1600 * 1024 or 1600 * 1200, every projector exports the left side and the right-hand part of former image, after optics and electron process, with the imaging that intercouples of the optical edge of left side and right-hand part image, realized showing a complete single screen image with the paired coupling optical path of two-shipper, with Fig. 1,2 compare, and obtain the complete image that a unit are luminous flux and unit are pixel all double.The optics and the electrical principles of present embodiment are seen Fig. 4.

Referring to Fig. 4 A, the common rear projection screen of single Fei Nieer focus carrying out two-shipper optics when synthetic, requires the optical focus of two-shipper preferably to be focused on the Fei Nieer focus 2 of rear projection screen 1, this is difficult to realize in the past, does not overlap with the optical centre (optical focus) 3 of projector shown in Fig. 4 A.And now new commercially available civilian DLP projector, convenient on the convenience used and the light path design, its optical centre 3 just can overlap (Fig. 4 B) with the Fei Nieer focus 2 of rear projection screen 1 at the lower limb of image.This just provide a kind of like this may: upper and lower two projectors are stacked, and every optical centre 3 can place on the optical centre 2 of whole screen rear projection screen of single Fil Nie Er focus, thereby provides convenience (Fig. 4 C) for superposition.But, because the ratio of common projector's outgoing image all is 4: 3, the length-width ratio of rear projection screen also is 4: 3, both are behind the vertical direction superposition, the Aspect Ratio of its synthesizing optical image becomes: 4/3+3=4:6, this departed from far away 4: 3, and graphics proportion is seriously lacked of proper care, the serious distortion (Fig. 4 D) of synthetic video image.If utilize the method for figure half-twist, can obtain following ratio: 3+3/4=6: 4=3: 2=1.5, with the length-width ratio of common 4: 3 images be that 4/3=1.33 is comparatively approaching.The long edge lengths of supposing rear projection screen is 12, and then 4: 3 screens are 12: 9, and screen was 12: 8 in 3: 2.As seen (Fig. 4 E) very lacked in the composite image loss, minor face slightly can be cut, and can obtain to be full of the composite image (Fig. 4 F) of the whole display areas of screen.As for 90 ° of rotated images, then should be rotated counterclockwise 90 ° on the left side, the right be rotated counterclockwise 90 °.The figure rotation is its a kind of very common function for adopting ATI card or Savage series video card.When synthetic whole screen figure, should consider that the edge merges problem.This problem both can realize with present very general edge fusion device, but more expensive, one want 100,000 surplus yuan, two-shipper is exactly surplus in the of 20 ten thousand yuan with two, and is obviously too expensive.We consider can be with half shadow coincidence method, and utilization can be regulated the double end video card of video card output resolution ratio arbitrarily, as the new video card of Matrax.Because in pairs after the coupling, after 1024 * 768 resolution two-shippers are synthetic, total full frame resolution becomes 1536 * 1024, as long as the video card output resolution ratio is adjusted to 1600 * 1024, then every limit is many 32 row, it is 50% special material that these 32 row are adopted on the two-shipper output light path transmissivity in addition, can realize being close to seamless fusion.After the employing said method, we have just obtained the whole screen display packing that a kind of new two-shipper overlaps, it can utilize 4: the 3 ratio rear projection screens of the logical commercially available optical centre of two Daeporis in the common commercially available single Fei Nieer focus of the DLP projector at visual lower limb center and, by the two-shipper image respectively being rotated counterclockwise 90 ° method, obtain luminous flux and double, the composite image that resolution (more properly saying it is pixel) also doubles." DLP projector (unit resolution 1400 * 1050), we just can realize that 2100 * 1400 the whole screen of ultrahigh resolution shows if adopt commercially available 0.9.The projector of this resolution, except adopting the projector of ILA technology, still there is not other commercially available projection function to accomplish, and its price, for example make one 200 inches whole screens, as long as with two output light fluxs be the 6000ANSI lumen 0.9 " DLP projector (1400 * 1050) can realize the brightness and the whole screen demonstration of 2100 * 1400 ultrahigh resolution of every square metre of average 1000ANSI lumen.As adopt the WA200 of DNP " to shield, can obtain 400cd/m ²Screen before luminous exitance (or cry " screen preceding brightness ").And its two-shipper price is only surplus in the of 30 ten thousand, less than 1/3 of three DLP projectors of 12000ANSI lumen of a BARCO.

Fig. 5 is an example of the paired coupling circuit connection side of the present invention block diagram, external video input connects that video frequency collection card, VGA input connect the RGB capture card, the output of double end video card meets a pair of projector respectively, the output of many mouthfuls of string cards connects the RS232 mouth of a pair of projector respectively, by regulating the output resolution and the visual anglec of rotation of double end video card, the optical edge that realizes left side and right-hand part image intercouples, and obtains that the whole screen of single screen shows or double screen is bonding or the whole screen displayed image of splicing-in.Those of ordinary skills can realize, repeat no more.

Fig. 6 is the another kind of execution mode different with Fig. 3 A.Respectively exporting the left side of an image and right-hand part and two 4: 3 ratio rear projection screens with two W of projector all places vertically, employing can make the double end video card of arbitrary output pattern half-twist of double end output, is the image on each screen that the center of circle is rotated counterclockwise 90 ° with the Fei Nieer focus of each screen all, can obtain the vertically complete image of splicing of double screen.If projector's pixel resolution is 1024 * 768, double end video card resolution is 1536 * 1024, so image does not have distortion, but owing to adopt the double screen splicing, in the middle of the full screen display image piece is arranged, implementation result is not so good as Fig. 3 mode, but can adopt the engineering projector of ordinary optical center in the optical center, and big choice is arranged in the design.

Fig. 7 is the embodiment of expanded application of the present invention.If use the unit of 2500-3000ANSI lumen, elder generation's two-shipper superposition is coupling in pairs again, then can reach 10000-12000ANSI lumen total light flux, can take this to constitute 180 inches-200 inches the whole screen of paired coupling rear-projection, every square metre of equal luminous flux can reach the 1000-1200ANSI lumen.In addition, but also two or three or N coupling optical path unit horizontal amalgamation in pairs constitutes 2 * 1,3 * 1 or the huge mosaic screen of N * 1; Also four paired coupling circuits of two-shipper can be carried out 2 * 2 splicings, the application seamless soldering tech can obtain a huge mosaic screen of not seeing piece substantially again, and the like can constitute N * 2 * 2 splicing; Also can be with paired coupling optical path as a unit, realize the splicing of multiple huge whole screen, as four 200 inches the paired coupling optical path of four machines unit is kept flat, can constitute four 200 inches screens as the space tracking telemetry and control center of Beijing, as the DLP unit that adopts 1400 * 1050 pixel resolutions constitutes paired coupling optical path unit, its single screen resolution can reach 2100 * 1400 the whole screen demonstration of ultrahigh resolution, is much better than the display screen of Beijing space tracking telemetry and control center.

Claims

1, a kind of large screen whole screen rear projection display method, this method is coupled as basic thought in pairs with the whole screen of single focus Fei Nieer two-shipper, promptly adopt whole screen of single focus Fei Nieer and a pair of identical projector to be coupled in pairs, every projector exports the left side and the right-hand part of former image, after optics and electron process, with the imaging that intercouples of the optical edge of left side and right-hand part image, thereby obtain the complete image that a unit are luminous flux and unit are pixel all double, said optics and electron process comprise that the placement of projector must be the optical centre of a pair of projector and the optical focus of rear projection screen, the placement direction coupling of screen size ratio and screen; The transmission picture intelligence is equipped with commercially available double end video card, video frequency collection card and the RGB capture card that can regulate output resolution ratio and image rotation arbitrarily at least to the computer of projector, by regulating the output resolution ratio and the visual anglec of rotation of double end video card, the optical edge that realizes left side and right-hand part image intercouples, and obtains whole screen displayed image.

2, large screen whole screen rear projection display method according to claim 1 is characterized in that adopting commercially available optical centre to be positioned at the DLP projector at visual lower limb center, and two-shipper is vertically placed on same level; Adopt a commercially available single Fei Nieer focus, the rear projection screen horizontal positioned of length and width than 4: 3, the optical focus of projector is focused on the Fei Nieer focus of rear projection screen; With each image of computer double end video card is that the center of circle is rotated counterclockwise 90 ° with the Fei Nieer focus of screen all, and the full frame resolution after the output resolution ratio of regulating the double end video card and the two-shipper coupling is close, obtains putting in order shielding displayed image.

3, large screen whole screen rear projection display method according to claim 1 is characterized in that adopting commercially available common projector, and two-shipper is vertically placed on same level; Adopt commercially available single Fei Nieer focus, length and width vertically to place the back in 6: 4 whole screens of the bonding one-tenth of Chang Bianchu than two rear projection screens of 4: 3, every projector's correspondence is projected to the whole screen of half block; Is that the center of circle is rotated counterclockwise 90 ° with the Fei Nieer focus of each screen with computer double end video card all corresponding to the image of each split screen, obtains the whole displayed image of shielding.

4,, it is characterized in that adopting earlier after the two-shipper optical image Superposition Method of the prior art as a coupling unit, and then be coupled in pairs with one or more same units according to claim 1 or 2 or 3 described large screen whole screen rear projection display methods.

5,, it is characterized in that with the rear projection screen that is coupled in pairs be the unit, again the multiple unit splicing-in according to claim 1 or 2 or 3 described large screen whole screen rear projection display methods.