CN1187886A - Reversing film projection system - Google Patents

Abstract

The reversing film projection system employs film having images printed substantially side-by-side to allow presentation of one set of images in a forward direction and the adjacent images in rearward direction by moving the projection head and associated aperture plate and film guide laterally with respect to the lens and lamp house for display of the film images. In a first forward drive position, the projector motor drives the film in a forward direction with a first aperture of the aperture plate and associated first set of film images aligned with the optical train. Upon completion of the image presentation in the forward direction, the projection head is displaced laterally aligning a second aperture in the aperture plate and the associated second set of film images with the optical train, with the projection motor engaged in a reversed direction. Actuators for motion of the projection head, dowser controls and film transport drive are microprocessor controlled employing absolute frame count for various film presentations.

Description

Reversing film projection system

The background of invention

FIELD OF THE INVENTION

The present invention relates generally to show the automatic projection system field of movie film.The present invention provides the film with image of printing side by side especially, make it possible to by with respect to run a picture the image lens and the side of lampshade, mobile projection head and the relevant orifice plate and the guide piece of film resemble and at the adjacent image of backward directions (calling in the following text oppositely) projection at working direction (calling forward in the following text) projection set of diagrams.

Prior art

The projection equipment of motion picture film requires complicated mechanical system drive film by projector, and image projection stably is provided.For reaching this purpose, through for many years effort very ripe mechanical system had appearred already.

Even for brief theme, cartoon or other short-movie, it is very long that the length of film also can become.The feature film of general length is wanted great reel, and may be with the reel of a plurality of order projections on different projectors, so that form the film of a complete full motion image.When such film projection finished, film must be recoiled, so that projection next time.The requirement of recoiling has limited the ability with the film projection system robotization.Make and only to recoil automatically even recoil the film of staying in the projection gate, also need a lot of times to recoil its starting point by rewinding.

In another kind of scheme, developed the continuous circulation system of the film of can replaying immediately of high-precision and machinery complexity for some occasion.But, the cost of these systems height and complicacy be widely accepted because having hindered with reasonable prices.

On a single film, print a plurality of images side by side, make it possible to show a frame image, knew already in the principle of oppositely showing second frame image at a forward.No. 0191559 European patent communique of inventor JOHNMOSELY has illustrated this prior art.Early stage reverse projector system provides and can show slice, thin piece continuously with a projector, do not carry out film and recoil, and has eliminated the basic skills of the such complicacy of the circulation system for no reason again.

Be the machinery setting of simplification projector, thereby reduce cost and high-quality image projection can be provided, the invention provides the improvement of reverse projector principle.

The general introduction of invention

Film projection of the present invention depends on such film, comprising: first picture group that is spaced framing with first limit of film resembles, this picture group as if by the sequence of motion projection of film at forward; Second picture group that is spaced framing with another relative edge with film resembles, and this picture group resembles by the counter motion of film and shows in proper order.Projection system comprises: a lampshade, the setting of described lampshade are the light that is used for focusing on projection on a plane geometry position that limits or fenestra; With lens, the setting of described lens is to be used for and projection head combination, and to a screen projected image, described projection head can move laterally to the second place that oppositely runs a picture described by the primary importance that runs a picture at described forward by described fenestra.Described projection head comprises the gear train that can reverse, be used for when described projection head during in primary importance forward receive film and selectively mobile film, and be used for when described projection head reverse reception film and selectively mobile film during in the second place.

Described projection head comprises an orifice plate, and described orifice plate has first hole of aiming at first group of film frame and second hole of aiming at second group of film frame.Described projection head is in primary importance, and first hole of described orifice plate is aimed at described hole window, and described projection head is in the second place, and second hole of described orifice plate is aimed at described hole window.A projector base that moves described projection head is positioned on the linear bearing, is moved to the second place by primary importance by a slip fluid cylinder, and described slip fluid cylinder can be pneumatic, hydraulic pressure, and electromechanical formula ground drives.

Film in the plane of film operation receives roller and structurally is installed on the described movably projector base, be used for first or the second place at described base, make the film true(-)running, do not need the manual shift reel or receive the roller system when described projector base is moved to the second place or moved to primary importance by the second place by primary importance.

Because the tolerance that sprocket wheel and engaging of film hole produce, the size in first and second holes in the described orifice plate determines in order to adapt in the gear train that can reverse, prevent forward and oppositely during projection screen the above run a picture regional mobile.

Brief description of drawings

Can understand feature of the present invention better with reference to the following drawings:

Fig. 1 comprises projection head and relevant projector base, lamp base, lampshade, and the system component skeleton view of projector lens;

Fig. 2 a is that the film used of the present invention is arranged, forward and reverse drive resemble transversal displacement;

Fig. 2 b is for the dimensional tolerence in the transmission of compensation projector, with respect to the synoptic diagram of the hole dimension in the orifice plate of film frame;

Fig. 2 c and 2d have shown another embodiment of example shown in Fig. 2 a and the 2b;

Fig. 3 is system's skeleton view of being seen by preceding left comer, and lamp base (LB) is shown, and projector base (PB), film are sent and the relative position figure of take-up reel with relevant servo driving and film backing roll system;

Fig. 4 a is the skeleton view of being seen by left rear corner, and another figure with respect to the film backing roll system of projector base of film backing roll system is shown;

Fig. 4 b is the front view of system;

Fig. 4 c is the left side view of system;

Fig. 5 is used for the synoptic diagram that film of the present invention is arranged;

Fig. 6 a-c is that projection system is the software control flow chart of operation automatically under the control of microprocessor for the controller on basis.

The detailed description of invention

Fig. 1 illustrates mechanism's configuration of each assembly of the present invention.Lamp base (LB) 10 provides the supporting construction of rigidity mounting structure He other part of lampshade 12 of the present invention.Projection head 14 is contained on the projector base (PB) 16, and projection head 14 can move laterally to the second place shown in the dotted line by primary importance, and transversal displacement D is about 1 inch.The assembly of projection head comprises: a reversible drive motor 18, it has supporting driven pulley 20, is used for the running of each mechanical component of projection head.Projection head carries out the geneva motion of standard, and it is a known technology, will not described in detail in the disclosure.Shown in figure neutral line bearing 24, the projector base is supported on the linear axes 22 by linear bearing in a plurality of positions.Linear axes is contained on the suitable carriage 26 of lamp base.The fluid cylinder slide drive 28 that is connected on projector base and the lamp base drives projection head by the motion of primary importance to the second place.Depend on the pneumatic of concrete purposes free list standard, hydraulic pressure, or electromechanical driver.Projection lens 30 is contained on the lamp base rigidly, axially aligns with light source in the lampshade.At lampshade on the lamp base and lens position the light on the window of hole is focused on, the hole window limits and orifice plate 32 two-dimensional alignment three-dimensionally, and orifice plate 32 has two holes, and this will be explained below.The transverse movement of projection head one of makes in two holes aims at the hole window, thereby the focused ray of the maximum intensity of coming from lampshade is provided, and is used to show the film image of mating holes.

As the light that a light barrier of controlling automatically 34 controls are come by lampshade hereinafter will be described in detail in detail.As below describing in detail, the automatic running of a microprocessor controller 36 control system comprises: the rotating of motor 18, fluid cylinder slide drive 28 be first or second place location projection head, the providing and receiving of the motion of light barrier and control film.

For the embodiment shown in the figure, the structure of film is shown in Fig. 2 a and 2b.A fragment of 200 is shown in to be printed in the frame.The embodiment disclosed herein is 70 millimeter 5 film perforation film of standard of usefulness.35 millimeters the first picture frame group 210 is printed in 35 millimeters amplitudes of film, and the second film frame group 212 is printed on the horizontal contiguous place of first frame.The printing of the first frame group is to be used for, when film when the forward shown in the arrow 214 moves, the image that runs a picture, the second frame group because of printing is to be used for, when film during at the inverted running shown in the arrow 216, image runs a picture.The direction of the image of frame is the image of putting upside down of standard, as label 218 ' R ' shown in.The gap that is about 0.9375 inch film frame is consistent with standard 5 film perforations 70 Super 35 mm film Super 35s.

Move the frame of arranging for the film forward spaced apart with the contiguous first film limit 220, and the frame of inverted running and the second film limit 222 are spaced apart.In the embodiment shown in Fig. 2 a, forward and reverse frame roughly are laterally facing to arranging.Industry personage knows, is arranged by the frame size location of guide edge acquisition on film of film.Fig. 2 b illustrates the approx. dimension of the film of illustrated embodiment of the invention printing, it is characterized in that limit 222 is guide edges.As a reference, the camera hole of 65 millimeter 5 film perforation of frame 224 expression one standards, it has 2.072X0.9055 inches size.In the present invention, center to center lateral separation, the hole on orifice plate 32 226 and 228 (as shown in Figure 1) is 1 inch.Because difference in size causes between the vertical height in the middle driving-chain gear teeth and film hole at forward and the dimensional tolerence of gear train oppositely, the size in first and second holes is reduced by film frame in order to adapt to.Shown in Fig. 2 b, the scope that resembles district 230 of film frame is about 0.700X0.900 inches.The frame aspect ratio that be to keep primary image 1.35, the size in the hole on orifice plate are decided to be to provide and are about 0.600X0.810 inches show resembles area.The minimizing of vertical dimension PV on orifice plate is lacked an amount than optical image OV, and this amount is bigger slightly than the dimensional tolerence of the transmission of can reversing between forward and reverse, thereby guarantees to show the image of correct framing in positive and negative two directions.

In another embodiment shown in Fig. 2 c and the d, laterally consecutive frame be printed with a displacement, this amount equals the dimensional tolerence of gear train of can reversing, so that adapt to the demonstration by two holes of orifice plate 32, the size in two holes determines that minimizing is covered near the scope that resembles the district.

In second another embodiment, the setting height(from bottom) that supports the linear axes 22 of projector base be by near the axle head of primary importance to amount of axle head variation near the second place, be enough to just to compensate the difference in size between the vertical height in the bottom of forward and reverse intermediate chain gear teeth and film hole.The projector base causes the perpendicular displacement of projector base by primary importance to the translation of the second place, so projection head has compensated the film amplitude that illustrates.Change requirement by first the vertical dimension and be about 0.050 inch to the second place.

Do not require in the present invention with the projection head that can reverse and recoil film, formed very big advantage than prior art.Yet, for the storage film ability of high capacity dish is provided, and avoiding the requirement of dress reel on the projector base of motion, the present invention comprises a kind of novel film backing roll system as shown in Figure 3.It is to be installed in rigidly on the structure of lamp base or support lamp base that the forward film is given placing 300 (it constitutes reverse take-up reel) and forward take-up reel 302.The assembly that is installed to lamp base of Fig. 3 is represented with LB.Similarly, the assembly that is installed to removable projector base has the PB identification character.The first controllable servomotor 304 and first reel that are installed to rigidly on the lamp base supporting construction are supporting, and are connected to the driven pulley 306 of first dish in an illustrated embodiment by a driving belt (not shown).Similarly, the second may command servomotor 308 is installed to lamp base rigidly, drives second reel by a pulley 310 (not shown).In the embodiment shown in fig. 3, the direction of motion of first reel and projector base is vertically installed, and second reel is installed with projector base direction of motion with paralleling.In another embodiment, two reels all parallel with the projector base or vertically install, and are adapted to the optimal placement in the projection cabinet, and this will be described in detail below.

For the film of forward operation, film 312 is that roller 314 rigidity are installed to lamp base by the first dish pulling on roller 314, and rotation is basically parallel to the direction of motion of projector base.Parallel other embodiment of installation with the direction of motion of projector base for first dish, the installation of roller 314 makes the direction of motion of its rotation perpendicular to the projector base.Film runs to second roller 316 by roller 314, and roller 316 also is installed to lamp base, and has the rotation that is approximately perpendicular to projector base direction of motion.Roller 314 and 316 is spaced apart from each other, and allows film 90 degree rotations not turn round fast knot.Film runs to the 3rd roller 318 by roller 316, and it is installed to the projector base, and its rotation cardinal principle is perpendicular to the direction of motion of projector base.Roller 318 is installed to the projector base and allows the projector base not influence the feeding of film by first to the motion of the second place, because the film that moves between roller 316 and 318 is to aim at the direction of motion of projector base.Roller 316 or 318 or both in their installation, be equipped with a tensioning handle of adorning spring, when the projector base moves, keep film to stretch.

To the 4th roller 320 operation, the 4th roller 320 is installed on the projector base on the film gear train film and transversal displacement is enough to get rid of film by the operation of roller 318 to 320 interference to projection by the 3rd roller 318. Roller 318 and 320 installation that is spaced apart from each other allows the about 80 degree rotations of film not to kill knot.Film runs to roller 322 by roller 320, and roller 322 also is installed on the projector base on the film gear train.Roller 320 and 322 rotation are substantially parallel, and roller 322 be installed on the film gear train enough by on the last position, make film can rotate remaining 10 degree so that aim at just with its projection system.

Film draws by the projection system (not shown) behind orifice plate, and film leaves the projection kinematic train and engages with pinch roll 324, and roller 324 keeps film to aim at exhibitor.Film runs to roller 326 then, and roller 326 is installed to the projector base, and its turning axle is basically perpendicular to projector base direction of motion.Roller 326 is spaced apart with pinch roll 324, allows the about 90 degree rotations of film not kill knot.Film runs to roller 328 by roller 326, and roller 328 is installed on the lamp base.Described as preceding pair roller 326 and 318, roller 326 and 328 is aimed at, thereby film running direction is parallel to the direction of motion of projector base, and roller 326 or 328 or two all be installed in have extension spring tensioning last, when the projector base moves, keep film to stretch.Film runs to second reel 302 by roller 328, and it is the take-up reel of film forward operation.For reverse film running direction, the route of film is put upside down, and dish 302 is to send dish, and dish 300 is take-up reels.In each structure of projection cabinet that second dish 302 is installed perpendicular to projector base direction of motion, an additional roller is installed on lamp base, its rotation almost parallel projector base direction of motion, roller and roller 328 spaced apart installations that this is additional make film can carry out the operation rotation of 90 degree before receiving on second dish 302.As previously mentioned, if wish with first dish 300 be installed in the perpendicular direction of projector base direction of motion in, roller 314 is installed is made its rotation perpendicular to projector base direction of motion, perhaps, can eliminate roller 314, film directly runs to roller 316 by first dish 300.In illustrated embodiment, two reels are installed under lamp base and projection head, the interference of not going up face makes projector can be positioned at the eminence of projection room, so that show on the spectators crown of arenas with the down suction of minimum.

Fig. 4 a provides another figure of film receiving system, express each roller and send the dish and take-up reel between relation.Fig. 4 b and 4c also illustrate other film operational system figure, comprise the structure outline of the projection cabinet that seals whole projection system.Layout of the present invention makes projection system, film storage and guidance set be compact the installation in the projection cabinet of a single sealing, filtered inhaled air prevents that film and assembly from damaging, and formed good the controling environment that had both also moved for film for projection system.

As previously mentioned, the present invention can utilize a little controller operation continuously automatically that removes the reason device for the basis, and this controller is the servo torque motor of control automatically, sends and take-up reel the projection head motor that can reverse, the operation of projector base anchor drive and light barrier etc.Be in operation, microprocessor carries out following operation.The operator starts key with one or types of devices is started, and microprocessor is with the power connection of the servo torque motor of forward reel, for drawing and receive the stretching that provides suitable.Then in Fig. 6 a step 612, the operation of microprocessor operated positive movement projection head motor, for film mix the sound audio track with to any sound source queuing SMPTE or encode At All Other Times and combine.In step 614, the film frame number that the counter of microprocessor monitors and projection head one provides obtains the frame number that an indication projection begins then.It is suitable with the initial visual frame number of the sheet that moves that projection begins to indicate.In step 616, controller instruction lampshade baffle plate is opened, and in step 618, along with the frame count of projection is finished in microprocessor monitors to an indication, this projection is carried out continuously.Industry personage knows, can perform several sheets that separate when forward is shown.

In step 620, when reaching stop several, microprocessor controller is closed baffle plate, and stops to show drive motor and the servo torque motor of reel.Microprocessor instructs the projector base driver then, for inverted running moves to the second place with the projector base by primary importance.Projector motor and reception and send the dish torque motor, because the instruction inverted running of microprocessor controller, and the reverse frame number of projection beginning of microprocessor controller monitoring indication.When the correct frame number of receiving the projection beginning, microprocessor instruction lampshade baffle plate is opened, and film is oppositely shown.The film frame number that microprocessor monitors indication projection stops when frame number that receiving that the reverse projection of indication stops, is closed the lampshade baffle plate, stops projection head motor and the servo torque motor of film take-up reel.The microprocessor instruction driver moves to former primary importance by its second place then, and making can the forward operation.The projection head motor receives and sends the servo torque motor of dish and moved the forward film program of replaying again again by microprocessor at forward.Continuous operation like this lasts till always receives till system's stop signal of being sent by the operator.

Further specify the synchronous details of the operation of frame count and microprocessor controller control referring now to Fig. 5 and 6a-c.Fig. 5 illustrates the laterally adjacent image of both forward and reverse directions film and arranges, have sign: empty lead-in wire 400 for the reverse frame number of the reversing film frame counter of the forward frame number of projection 1 and projection 2 forward film frame counter and projection 3 and 4, black lead 402, projection beginning (frame) number S and sheet frame P.Industry personage knows, available four projections but can be carried out a plurality of projections as an example on each film direction.For simplicity, the projection 1 and 4 among the figure, the length of projection 2 and 3 is chosen as and equates, and projection 1 is with 35 expressions, and projection 2 is with 23 expressions.For obtaining in forward and reverse equal lengths, the projection in a direction or another direction can be inserted lead-in wire, so that form the forward and reverse frame number that equates.

Shown in Fig. 6 a-c, in step 600, keyboard or other device of operator's input of unidirectional or way traffic selected in the microprocessor controller monitoring.In step 602, the operator imports the number of projection and installs to the corresponding projection length of the film in the system.In step 604, microprocessor controller calculates whole projection length (TSL) by each projection length addition of operator's input.In this example, 35,23,35 and 23 whole length is 116.In step 606, microprocessor controller removes total projection length with 2, rounds up, and obtains a counter length (CL), determines forward and reverse counter length.Be in operation, if count value is carried out less than CL projection forward, if count greater than CL, microprocessor is at reverse drive projection head and supporting motor.Industry personage as can be known, when inverted orientation, the zeroing when reaching reverse projection terminal point counting is relative, the film frame counter can return to zero.

Finish by microprocessor controller and to reverse the process.When film frame number indication film position is about 6 feet of the counting put upside down of range direction, in step 622, for microprocessor controller is placed on projection head from stopping mode.In step 624, this mode slows down the projector motor and progressive counting to reverse frames.In step 626 and 628, when frame counter was indicated apart from inverted orientation one frame, in step 630, the projector motor cut out by microprocessor controller.On the frame of inverted orientation, film can slide, but actual should stopping.In step 632, microprocessor controller is finished moving of projection head then, and at inverted running.

Be the reference mark that the sign film reverses the process, as with frame counter or use the replacement scheme of the scheme that combines with frame counter, microprocessor controller can utilize in lip-deep physical token of film and the combined system of an analyzer.As shown in Figure 3, in a control position of wishing, a metal strap 330 is set on film, it can stop light source 332 to enter receiver 334.Industry personage can know, is used in the light source of film the same side and the reflecting system of receiver and can be used as another program.Physical token on film is used for producing an external signal that replaces the film counting to measure, and is used to produce a control function by microprocessor.Can add a plurality of physical token on film, be used to send the signal that the film direction is put upside down, comprise: step 648 shown in Fig. 6 c and the motion of 650 projection heads, step 640 and 642 light barriers are opened with the light barrier of step 644 and 646 and are closed.In other embodiments, the physical token on the film also is used for frame counter or other time set of initialization in microprocessor, finishes the control function of hope.

Relevant regulations according to patent statute have at length been introduced the present invention already.Industry personage can carry out little substitutions and modifications to the embodiment in this explanation.These modifications and replacement are in the described scope of the present invention of appended claim.

Claims (16)

1. film projection system comprises:

Film, first picture group that comprises with first limit of film arrangement framing at interval resembles, this picture group as if by the sequence of motion projection of film at forward; Resemble with second picture group with second limit of film arrangement framing at interval, this picture group resembles by the counter motion of film and shows in proper order, and described second group frame is essentially horizontally adjacent with first framing;

One lampshade, the setting of described lampshade are the light that is used for focusing on projection on the window of hole;

One lens, the setting of described lens is to be used for, by described hole window to a screen projected image;

One projection head can be moved to the second place by primary importance, and have

The film gear train, be used for when described projection head during in primary importance forward receive film and selectively mobile film, and be used for when described projection head reverse reception film and selectively mobile film during in the second place,

One orifice plate, described orifice plate have first hole of aiming at first group of film frame and second hole of aiming at second group of film frame, in the primary importance of described projection head, described first hole is further aimed at described hole window, in the second place of described projection head, described second hole aim at described hole window and

The device that described projection head is moved to the second place by described primary importance.

2. film projection system according to claim 1 is characterized in that, second framing of described film and described first group of vertical shift one scheduled volume, with compensation at forward with oppositely, difference in size between the vertical height at the bottom of the tooth of intermediate chain wheel and between the film perforation.

3. film projection system according to claim 1 is characterized in that, the second place of described projection head is by primary importance perpendicular displacement one scheduled volume, with compensation at forward with oppositely, the difference in size between the vertical height at the bottom of the tooth of intermediate chain wheel and between the film perforation.

4. film projection system according to claim 1, it is characterized in that, described first hole of described orifice plate has a vertical dimension PV1, PV1 is less than the vertical dimension OV1 of the elephant on first framing, described orifice plate second hole has a vertical dimension PV2, PV2 is less than the vertical dimension OV1 of the elephant on second framing, thus PV1-OV1 and PV2-OV2 than at forward with oppositely, difference in size is big at the bottom of the tooth of intermediate chain wheel and between the film perforation vertical height.

5. film projection system according to claim 4 is characterized in that, described first and two holes have the predetermined lateral dimension with respect to they vertical dimensions, forms a desirable aspect ratio on the image of projection.

6. film projection system according to claim 1, it is characterized in that, move the device and the film gear train of described projection head, receive and move the first control input that described projection head arrives primary importance and selectively moves at described forward, described projection head arrives the second place and selectively in the second control input of described inverted running, described system also comprises with moving:

One lampshade baffle plate;

One absolute film frame counter;

One projection controller, be used for described projection head, the control of film gear train and baffle plate, described controller is by described frame counter frames received, open light barrier at forward at predetermined frame number, close light barrier at forward at the second predetermined frame number, oppositely opening light barrier, oppositely closing light barrier at the 4th predetermined frame number at the 3rd predetermined frame number.

7. film projection system according to claim 6, it is characterized in that, described controller comprises that response one external signal forms the device of the described first control input, respond the 3rd external signal and remove the device of the described first control input and response is formed the described second control input by a timer of described the 3rd external signal startup device.

8. film projection system according to claim 6 also comprises:

First and second reels;

First and second drive the controllable motor of described reel; With

It is characterized in that the described first control input is at the described may command motor of forward drive, the described second control input is at the described may command motor of reverse drive.

9. film projection system according to claim 10 is characterized in that, described may command motor is the servodrive torque motor.

10. film projection system according to claim 1, it is characterized in that described projection head is installed on the projection base, can be moved to the second place by described primary importance, and described projection base is installed on the rigidity lamp base removable, and described system also comprises:

One first film route guidance roller is installed to described projection base, and the rotation that has is basically perpendicular to described projection base by the axis of described primary importance to second place motion;

One second film route guidance roller is installed to described lamp base, and the rotation that has is basically perpendicular to the described axis of movement of described projection base; The described second film route guidance roller receives film by a reel, transmits by the described first guiding route roller to the described first guiding route roller and advances to described projection head, for the film of showing.

11. film projection system according to claim 12 also comprises:

One the 3rd film route guidance roller, be installed to described projection base, its rotation is basically perpendicular to the described direction of motion of described projection base, with one the 4th film route guidance roller, be installed to described lamp base, its rotation is basically perpendicular to the described axis of movement of described projection base, and described the 3rd guide roller receives by the next film of described projection head, transmit to described the 4th guide roller, described the 4th guide roller is provided to film described second dish again.

12. film projection system according to claim 12, be installed in one self-contained by the suction air that filters around the operation cabinet in.

13. a film projection system comprises:

Film, comprise with first limit of film arrangement framing at interval first picture group resemble this picture group as if by the sequence of motion projection of film at forward; Resemble with second picture group with second limit of film arrangement framing at interval, this picture group resembles by the counter motion of film and shows in proper order, and described second group frame is essentially horizontally adjacent with first framing;

One lampshade, the setting of described lampshade are the light that is used for focusing on projection on the window of hole;

One lens, the setting of described lens is to be used for, by described hole window to a screen projected image;

One projection head can be moved to the second place by primary importance, and have

But a reversible film gear train is used for receiving film and selectively mobile film at forward when described projection head during in primary importance, and be used for when described projection head during in the second place at reverse reception film and selectively mobile film,

One orifice plate, described orifice plate has first hole of aiming at first group of film frame, with second hole of aiming at second group of film frame, primary importance at described projection head, first hole of described orifice plate is aimed at described hole window, in the second place of described projection head, second hole of described orifice plate aim at described hole window and

The device that described projection head is moved to the second place by primary importance,

Wherein, the device and the film gear train that move described projection head receive the first control input that mobile described projection head arrives primary importance and selectively moves at forward, described projection head arrives the second place and selectively in the second control input of inverted running, described system also comprises with moving:

One lampshade light barrier;

One absolute film frame counter;

One projection controller, be used for described projection head, the control of film gear train and light barrier, described controller is by described frame counter frames received, open light barrier at forward at predetermined frame number, close light barrier at the second predetermined frame number, oppositely opening light barrier at the 3rd predetermined frame number at forward, oppositely closing light barrier at the 4th predetermined frame number

Described controller comprises that response one external signal forms the device of the described first control input and responds the 5th predetermined frame number and removes the device of the described first control input.

14. film projection system according to claim 13 is characterized in that, described controller comprises that response by the timer that the described the 5th predetermined frame number starts, forms the device of the described second control input.

15. film projection system according to claim 13 is characterized in that, described controller comprises response one second external signal, forms the device of the described second control input.

16. a film projection system comprises:

Film, comprise with first limit of film arrangement framing at interval first picture group resemble this picture group as if by the sequence of motion projection of film at forward; Resemble with second picture group with another relative edge arrangement framing at interval of film, this picture group resembles by the counter motion of film and shows in proper order, and described second group frame is essentially horizontally adjacent with first framing;

One lampshade, the setting of described lampshade are the light that is used for focusing on projection on the window of hole;

One lens, the setting of described lens is to be used for, by described hole window to a screen projected image;

One projection head can be moved to the second place by primary importance, and have

But a reversible film gear train is used for receiving film and selectively mobile film at forward when described projection head during in primary importance, and be used for when described projection head during in the second place at reverse reception film and selectively mobile film,

One orifice plate, described orifice plate have first hole of aiming at first group of film frame and second hole of aiming at second group of film frame, in the primary importance of described projection head, described first hole is aimed at described hole window, in the second place of described projection head, described second hole aim at described hole window and

The device that described projection head is moved to the second place by primary importance,

Wherein, the device and the film gear train that move described projection head receive the first control input that mobile described projection head arrives primary importance and selectively moves at forward, described projection head arrives the second place and selectively in the second control input of inverted running, described system also comprises with moving:

One lampshade light barrier;

One absolute film frame counter;

One projection controller, be used for described projection head, the control of film gear train and light barrier, described controller is by described frame counter frames received, open light barrier at forward at predetermined frame number, close light barrier at the second predetermined frame number, oppositely opening light barrier at the 3rd predetermined frame number at forward, oppositely closing light barrier at the 4th predetermined frame number

Described controller comprises that response one external signal forms the device of the described first control input, respond the 5th predetermined frame number and remove the device of the described first control input, form the device that described first control is imported with response one external signal, remove the device of the described first control input and response is formed the described second control input by a timer of described the 3rd external signal startup device with response the 3rd external signal.

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