CN1261794C - Image projecting equipment comprising rotating reflector - Google Patents
Image projecting equipment comprising rotating reflector Download PDFInfo
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- CN1261794C CN1261794C CN 02152022 CN02152022A CN1261794C CN 1261794 C CN1261794 C CN 1261794C CN 02152022 CN02152022 CN 02152022 CN 02152022 A CN02152022 A CN 02152022A CN 1261794 C CN1261794 C CN 1261794C
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Abstract
The present invention relates to image projecting equipment comprising a rotating reflector, which comprises a power supply, an image signal input interface, an image signal processing circuit, a control circuit, a driving motor (70), an optics lens assembly (12) and an image reflector (14). Especially, the present invention also comprises a plane reflector group (11) which is rotatable and is distributed in an annular way, and luminous tube array (13) which is arranged in a straight line. The plane reflector group (11) is installed on a loading mirror wheel disc (72), and the optics lens assembly (12), the luminous tube array (13) and the image reflector (14) are positioned in a physical space surrounded by the plane reflector group (11). The arranged direction of luminous tubes of the luminous tube array (13) is parallel to a rotating axis of a driving motor (70). The present invention has the advantages that the manufacture and assembly difficulties of used elements are reduced, and thus, the manufacture cost of the image projecting equipment is reduced.
Description
Technical field the present invention relates to image projection device; Be particularly related to one group of reflective mirror around the luminous tube array rotation, the light reflection that luminotron is sent enters an optical lens group, projects image onto the device that screen gets on by image mirror again.
The present image projection device of background technology mainly is to utilize the plane projection technology, and this technology at first needs to produce the little image of a high brightness, and the light that this image sends focuses on the big plane projection image of formation on the screen through optical lens.
Slide projector is the image that produces high brightness with film and spotlight, film projector is the plane picture that produces motion with the film of motion, it is image device that television projector mainly adopts the kinescope of the CRT of high brightness, the multimedia projector major part is to utilize LCD, flat panel display device such as DLP and LCOS, the pixel of these flat panel display devices is many, and manufacture difficulty is big, the cost height.
The collimation of laser is good, can export the fine laser beam of high brightness.Existing people utilizes the plane mirror drum of rotation that laser beam is carried out deflection scanning, forms two-dimensional image on screen.Because the cost height of high power laser, and the manufacturing of high-speed electric expreess locomotive and plane mirror drum is very difficult, adopts the laser projection of this technology not popularized.
In order to reduce the rotational speed of plane mirror drum, the technical scheme that a plurality of micro laser beam arrays are scanned has appearred several years ago.But it is very big to produce the micro devices difficulty that can produce a plurality of fine collimated laser beams.
Above Color Laser Projection Technology all adopts the reflective mirror drum of the less filled polygon of the volume of a high speed rotating, be characterized in that each reflective surface on the mirror drum all is a turning axle dorsad, luminescent device is positioned at the outside of reflective mirror drum, when the close together of luminescent device and reflective mirror drum, the mirror image of luminescent device in the reflective mirror of rotation forms a very crooked track, and this very crooked track can not be imaged onto by common optical lens on the plane.
Summary of the invention technical matters to be solved by this invention is, avoid above-mentioned the deficiencies in the prior art and propose a kind of with luminous tube array alternative CRT, LCD, DLP, LCOS image device, with one group of plane mirror, around a plurality of static luminotron rotations along line spread, year mirror wheel dish that links drive motor rotating shaft and plane mirror group with flexible connector, and be equipped with a plurality of sensors and a control circuit, the projection arrangement that the installation deviation of each plane mirror is measured and is in operation the locus of plane mirror is adjusted; The topmost advantage of this projection arrangement is to have reduced the manufacturing and the assembly difficulty of used device, thereby has reduced the manufacturing cost of projection arrangement.
The technical scheme that the present invention solve the technical problem employing is as follows:
Manufacture and design an image projection device, comprise power supply, signal of video signal input interface, video signal processing circuit, control circuit, drive motor, optical lens group and image reflective mirror; Especially also plane mirror group and a luminous tube array of comprising a rotatable annular spread along line spread; The plane mirror group is installed in one and carries on the mirror wheel dish, and the reflective surface of each plane mirror all keeps identical distance towards the rotation that carries the mirror wheel dish and with rotation; Optical lens group, luminous tube array and image reflective mirror are positioned within the physical space that the plane mirror group surrounds and fixedly install; One end of optical lens group is near the plane mirror of plane mirror group, and luminous tube array is arranged on the optical axis of the optical lens group other end; The orientation of the luminotron of luminous tube array is parallel with the rotation of drive motor; The rotating shaft of drive motor is attached at the center of carrying the mirror wheel dish and vertical with the baseplane of carrying the mirror wheel dish; Keep a small angle between the rotation of each plane mirror and year mirror wheel dish.
Video signal processing circuit is also controlled and plane mirror keeps synchronously in the position of the plane mirror of control circuit detection plane reflective mirror group; The luminous intensity of each luminotron on the video signal processing circuit control luminous tube array; By the optical lens group of light by fixing of luminous tube array outgoing, through a direct reflection of Plane of rotation reflective mirror group, pass optical lens group again, through the reflection of image reflective mirror, final focusing on screen forms the luminous point that moves.
Below be refinement to such scheme:
Luminotron of the present invention can be modulated luminescent device by the little light-emitting area of high brightness and constitute; These luminescent devices comprise the LED of laser diode, edge-lit and have light valve, lenticular solid state laser; Luminescent device is integrated on the block semiconductor chip, or is distributed on the substrate.
The characteristics of luminotron of the present invention are, light-emitting area is tiny, and luminous intensity is big, and emergent light has the enough big angle of divergence.In the prior art, the edge-lit diode of semiconductor laser diode and high brightness all has these characteristics, and the light of optical fiber outgoing also has these characteristics, and high-intensity continuous laser passes light valve and lenticule, also can make luminotron of the present invention.In the present invention, the device that all is had a this luminous characteristics is referred to as luminotron.The light-emitting area of a plurality of luminotrons is centered close to straight line, and the distance between adjacent luminotron equates, each luminotron is luminous towards same direction, do not have light to penetrate in opposite direction, by this way a plurality of luminotrons are arranged on a device that is constituted on the thin slice and are called the luminous tube array sheet.The embodiment of the best of the present invention is to constitute a luminous tube array with a luminous tube array sheet, in the time of necessary, constitutes a luminous tube array with a plurality of luminous tube array sheets in the mode that optics makes up.
Light that luminotron sends from the luminous tube array enters optical lens group from a side of optical lens group, penetrates from opposite side, through the plane mirror reflection, passes optical lens group once more, focuses on the plane forwardly.The image reflective mirror reflects light on the screen, form a bright spot, a plurality of luminotrons on the luminous tube array, on screen, form a plurality of bright spots of vertically arranging clearly, along with plane mirror rotates around the center of carrying the mirror wheel dish, these bright spots on the screen move with regard to along continuous straight runs, visually form the sweep trace of many levels; If on the luminous tube array N luminotron arranged, then forms N bar horizontal scanning line on the screen.
If there is a small angle on the plane of plane mirror with the rotation that carries the mirror wheel dish, the N bar sweep trace on the screen all can change in vertical direction.If the reflective mirror of plane mirror group has the different angle of M kind with the rotation that carries the mirror wheel dish, N bar sweep trace just has M kind vertical shift, visually just forms M * N bar sweep trace; Make the spacing of every adjacent sweep trace identical, and the reference position of every sweep trace is identical with length, just forms the plane picture of a rectangle.Image resolution is in the horizontal direction determined by the modulating frequency of driving circuit to luminotron.
If all luminotron is with a kind of color, the image of formation is monochromatic image.If arrange alternately with the luminotron of Red Green Blue and to make luminous tube array, the RGB scanning line that projection forms overlapping on sequential visually forms the projected image of colour.If luminotron is the white luminous pipe that comprises Red Green Blue spectrum that can modulate, on plane mirror, stick or plate the light filter film of red, green, blue three looks respectively, the image of Red Green Blue overlapping on sequential visually forms colored projected image.
First kind of embodiment of luminous tube array is to use a luminous tube array sheet.Trichromatic luminotron is sticked on the thin slice, make colored hair light pipe array chip.Along with development of semiconductor, new technology can be integrated in trichromatic luminotron on a slice integrated circuit, makes colored hair light pipe array chip.In order to dispel the heat, the luminous tube array sheet can be positioned in the light source box, make luminous tube array.In the time of necessary, light source box is sealed; The printing opacity end face of light source box is equipped with sheet glass or lens, and the both sides of light source box have ventilating opening, connects the wind-cooling heat dissipating system of sealing.Cooling system comprises a light source box, two ventilation ducts, a heating radiator and a fan; Luminous tube array is positioned at the centre of light source box.Light source box comprises the light inlet window of being made by sheet glass or lens, and ventilation interface and an electric signal joint; Ventilation interface links two ventilation ducts respectively.
Second kind of embodiment of luminous tube array is to use a plurality of luminous tube array sheets and an elongated reflective mirror to form a colored hair light pipe array indirectly.This array comprises an elongated reflective mirror, lens and a luminous tube array combination; Luminous tube array combination comprises three monochromatic luminous tube array sheets of red, green, blue (R), (G) and (B) and two two look light splitting pieces; The luminous tube array combination on the reflective surface of elongated thin reflective mirror, through elongated reflective mirror reflection, forms a colored hair light pipe array towards optical lens group through lens imaging, and elongated reflective mirror is made by an elongated sheet metal.
The another embodiment of elongated reflective mirror is the optical prism group that forms with reflective prism and two optical prism gummeds of printing opacity prism; Elongated reflective mirror comprises a prism module and an elongated reflective coating; Prism module is to be formed by reflective prism and printing opacity prism gummed, and two printing opacity end faces that constituted are transmission planes, and the light inlet face of reflective prism is a transmission plane; Elongated reflective coating is positioned on the cemented surface of reflective prism or printing opacity prism.The light that elongated reflective coating reflects is injected optical lens group.
Because the light high concentration is at elongated light reflecting membrane, easily it is caused damage, the scheme of implementing elongated reflective mirror can also be to keep an elongated fully reflecting surface on the gummed end face of reflective prism, on the gummed end face of the printing opacity prism corresponding, be carved with a stria with fully reflecting surface, in the time of two prism gummeds, optical cement is not coated with into stria and fully-reflected plane.
Carry on the mirror wheel dish if can accurately plane mirror be fixed on, and guarantee the turning axle even running of drive motor, enforcement of the present invention is just very simple.And in actual manufacture process, mismachining tolerance and rigging error are inevitable.In order to solve mismachining tolerance and rigging error problem, an important measures of the present invention is that the binding between plane mirror group and the drive motor is realized by a flexible connector; The center fixation of flexible connector links the rotating shaft of drive motor, the fixedly connected year mirror wheel dish in the edge of flexible connector; A Balance Control combination is arranged between base and year mirror wheel dish; When the Balance Control combination quits work, carry the mirror wheel dish and closely contact with stop device.
Adopted after the flexible connector, made the operation of carrying the mirror wheel dish that the more freedom degree be arranged.The running orbit that carries the mirror wheel dish is meant and carries the mirror wheel dish in the rotation process of a circumference, carries the variation pattern of mirror wheel dish vergence direction and degree of tilt.The effect of Balance Control combination is that a real-time inclination deviation and a control year mirror wheel dish that detects the plane mirror of rotation operates on the target trajectory.When a year mirror wheel dish operates on the target trajectory, can on screen, form one group of accurately sweep trace of location during each plane mirror process optical lens group.
Balance Control combination comprises a magnetic conduction annulus, three range sensors, minute surface obliquity sensor and at least three s' electromagnet.The magnetic conduction annulus has very high magnetic property, is fixed on the bottom of carrying the mirror wheel dish, and its center of circle is positioned on the rotation that carries the mirror wheel dish.Near a side of range sensor, the end face of magnetic conduction annulus is very smooth, bright and clean.A gap is arranged between range sensor and this end face, and range sensor is measured self to the distance between this planar end, and according to the numerical value that three range sensors are measured, control program calculates the vergence direction and the degree of tilt of carrying the mirror wheel dish; Control program calculates the running orbit that carries the mirror wheel dish by continuous sampling.Three or more electromagnet is installed with respect to the magnetic conduction annulus, and a gap is arranged between the flat end face of magnetic conduction annulus, and when electric current passed through electromagnet, electromagnet produced attractive force to the magnetic conduction annulus, and the direction of attractive force is parallel with the drive motor rotation.Range sensor, electromagnet, drive motor and stop device are arranged on the same base.
Projection arrangement is when starting working, and the electric current in the electromagnet progressively increases, and attracts to carry mirror wheel disk detachment stop device, and then a drive motor drive year mirror wheel dish begins to rotate.At the rotation initial stage, control program is discerned the alignment error of each plane mirror by sensor, and according to these errors, control program calculates a target trajectory that carries the operation of mirror wheel dish.Control program periodic variation electromagnet is to the attractive force of magnetic conduction annulus, and control is carried the mirror wheel dish and moved on target trajectory.The inclination angle of the real-time measurement plane reflective mirror of minute surface obliquity sensor, the upright position of the corresponding scanline groups of the measured value at inclination angle on screen; When measurement result and desired value had than mistake, control program was just controlled the operation of carrying the mirror wheel dish in real time by electromagnet, and revised a target trajectory that carries the operation of mirror wheel dish.
Projection arrangement carries the mirror wheel dish and rests on the stop device out-of-work the time.Another purpose that stop device is set is, when sudden power or Balance Control combination are broken down, provides protection to carrying mirror wheel dish and plane mirror group.
Minute surface obliquity sensor preferred embodiment of the present invention comprises an equally distributed curved surface light source of brightness, the crooked anti-dazzling screen that straight shading edge is arranged, lens, a rectangle lightlng hole, a daylighting film and a photoelectric sensor; The light of curved surface light source penetrates the reflective mirror of directive plane mirror group from the light inlet window of anti-dazzling screen; The shading edge of anti-dazzling screen is positioned on the plane; This plane is vertical with the rotation of drive motor, and with the optical axis coincidence of lens; On the optical axis that is centered close to lens of rectangle lightlng hole, and its long limit is parallel with the rotation of drive motor; The daylighting film is adjacent to the rectangle lightlng hole; Photoelectric sensor is arranged in the darkroom of face seal behind the daylighting film.The daylighting film has translucent and astigmatic feature, and the light-sensitive surface of photoelectric sensor is faced the daylighting film, and keeps a suitable distance with the daylighting film.When plane mirror rotated to the optical lens group front, the shading edge of anti-dazzling screen was through plane mirror and lens, blur-free imaging on the daylighting film corresponding to the part of lightlng hole.When the plane mirror inclination angle changed, the image space of shading edge on the daylighting film of anti-dazzling screen was along with moving, and the illuminating area on the daylighting film changes, and control circuit calculates the plane mirror inclination angle according to the illuminating area that photoelectric sensor records on the daylighting film.
For the angle position of accurate detection plane reflective mirror, determine the starting point of sweep trace, minute surface rotary angle transmitter preferred embodiment of the present invention comprises a luminotron, a thin light hole, lens, a long narrow square lightlng hole and a photoelectric sensor.The light that luminotron sends passes lens, reflects, passes again lens through plane mirror through light hole.When plane mirror goes to the position of setting, optical convergence is burnt to become a luminous point to pass lightlng hole, is accepted by photoelectric sensor.Lightlng hole is very narrow, therefore can accurately record the corner of plane mirror, and the long center line of long narrow square lightlng hole is parallel with the rotation of drive motor, and when plane mirror had some inclination angles, the minute surface rotary angle transmitter also can accurately detect.
Circuits System comprises that video signal processing circuit and one are the control core circuit with the high speed microprocessor.Video signal processing circuit comprises a vision signal decoding or coding circuit, a bus switch, two video memories and three driving circuits.First task of Circuits System is that a control year mirror wheel dish operates on the target trajectory; Second task of Circuits System is the rotating speed of monitoring the inclination angle of plane mirror in real time and carrying the mirror wheel dish, the controlling and driving rotating speed of motor; In case of necessity, the target trajectory that carries the operation of mirror wheel dish is controlled and is revised in the operation of carrying the mirror wheel dish in real time.The 3rd task of Circuits System is to decoded digital video signal or to the analog video signal coding, stores the image in the video memory by bus switch; Meanwhile, control circuit takes out view data by bus switch from another video memory, delivers to the luminotron driving circuit, the luminous intensity of modulator glow tube, and the scanning of carrying out image shows.
Compared with prior art, image projection device of the present invention is easier to processing and manufacturing, thereby processing cost is reduced greatly.
Description of drawings
The present invention is as follows with the accompanying drawing of the image projection device of the reflective mirror group formation of rotation.
Luminous tube array, the plane mirror group of Fig. 1 image projection device that to be the present invention constitute with the reflective mirror group of rotation are provided with synoptic diagram;
Fig. 2 is the structural representation of the present invention with the monochromatic luminous tube array sheet with 4 monochromatic luminotrons of the image projection device of the reflective mirror group formation of rotation;
Fig. 3 is the structural representation of the present invention with the colored hair light pipe array chip with 6 colored hair light pipes of the image projection device of the reflective mirror group formation of rotation;
The sweep trace synoptic diagram of 4 luminotrons on screen when all reflective mirrors of Fig. 4 image projection device plane mirror group that to be the present invention constitute with the reflective mirror group of rotation are all parallel with rotation;
The synoptic diagram of screen upper tracer when 8 reflective mirrors of Fig. 54 luminotrons of image projection device luminous tube array that to be the present invention constitute with the reflective mirror group of rotation, plane mirror group and turning axle have different angle;
Fig. 6 is that the image projection device colored hair light pipe array chip that the present invention constitutes with the reflective mirror group of rotating carries out the schematic diagram that coloured image scans;
Fig. 7 is the structural representation of the present invention with the image projection device light source box of the reflective mirror group formation of rotation;
Fig. 8 is image projection device light source box and the cooling system binding synoptic diagram of the present invention with the reflective mirror group formation of rotation;
Fig. 9 is the formation synoptic diagram of the present invention with a kind of luminous tube array of image projection device of the reflective mirror group formation of rotation;
Figure 10 is the formation synoptic diagram of the present invention with the another kind of luminous tube array of image projection device of the reflective mirror group formation of rotation;
Figure 11 is that the present invention is provided with synoptic diagram with three kinds of sensors of image projection device that the reflective mirror group of rotating constitutes;
Figure 12 is the structural representation of the present invention with the flexible connector of image projection device, Balance Control combination and the stop device of the reflective mirror group formation of rotation;
Figure 13 is the structural representation of the present invention with the minute surface obliquity sensor of the image projection device of the reflective mirror group formation of rotation;
Figure 14 is the structural representation of the present invention with the minute surface rotary angle transmitter of the image projection device of the reflective mirror group formation of rotation;
Figure 15 is the functional-block diagram of the present invention with the image projection device Circuits System of the reflective mirror group formation of rotation.
Embodiment is described in further detail the present invention below in conjunction with drawings and Examples.
As shown in Figure 1: the present invention comprises with the image projection device of the reflective mirror group formation of rotation: drive motor 70, optical lens group 12 and image reflective mirror 14; Especially also plane mirror group 11 and a luminous tube array 13 of comprising a rotatable annular spread along line spread; Plane mirror group 11 is installed in one and carries on the mirror wheel dish 72, and the reflective surface of each plane mirror all keeps identical distance towards the rotation that carries mirror wheel dish 72 and with rotation; Optical lens group 12, luminous tube array 13 and image reflective mirror 14 are positioned within the physical space that plane mirror group 11 surrounds and fixedly install; One end of optical lens group 12 is near the reflective mirror of plane mirror group 11, and luminous tube array 13 is arranged on the optical axis of optical lens group 12 other ends; The orientation of the luminotron of luminous tube array 13 is parallel with the rotation of drive motor 70; The rotating shaft of drive motor 70 is attached at the center of carrying mirror wheel dish 72 and vertical with the baseplane of carrying mirror wheel dish 72; Keep a small angle between the rotation of each plane mirror and year mirror wheel dish 72.
Video signal processing circuit is also controlled and plane mirror keeps synchronously in the position of the plane mirror of control circuit detection plane reflective mirror group 11; The luminous intensity of each luminotron on the video signal processing circuit control luminous tube array 13; By the optical lens group 12 of light by fixing of luminous tube array 13 outgoing, through a direct reflection of Plane of rotation reflective mirror group 11, pass optical lens group 12 again, through 14 reflections of image reflective mirror, final focusing on screen 16 forms the luminous point that moves.
The light transmission optical lens group 12 that the luminotron of luminous tube array 13 sends, reflective mirror reflection through plane mirror group 11, see through lens combination 12 again and focus on, the light that image reflective mirror 14 will focus on reflexes on the screen 16, forms a plurality of luminous points of arranging along vertical line.Luminous tube array 13 is positioned over a special position, when the reflective mirror of plane mirror group 11 rotates, the mirror image of the luminotron of luminous tube array 13 in plane mirror will be along a very track operation of near linear, its mobile mirror forms the virtual image 15 of an almost plane, and the virtual image 15 forms real image by optical lens group 12 and image reflective mirror 14 on screen 16.Therefore, a plurality of luminous points on the screen 16 are parallel at the same time mobile the time, can accurately focus on all the time, form many horizontal scanning lines clearly.As shown in Figure 4: if the rotating shaft of the reflective mirror in the plane mirror group 11 and drive motor 70 keeps different inclination angles, plane mirror is when a side of optical lens group 12 turns over, and the sweep trace that forms on screen 16 will be positioned at different positions in vertical direction.If the reflective mirror of plane mirror group 11 has M inclination angle, luminous tube array 13 has N luminotron, visually can occur M * N bar sweep trace on the screen.As shown in Figure 5: adjust the reflective mirror inclination angle of plane mirror group 11, adjacent scanning lines is distributed on screen 16 equidistantly, form uniform rectangular image.Can modulate if luminotron is a monochrome, the image of formation is monochromatic.Can modulate if luminotron is a colour, the image of formation is colored.
As shown in Figure 2: luminotron 22 can be modulated luminescent device by the little light-emitting area of high brightness and constitute; These luminescent devices comprise the LED of laser diode, edge-lit and have light valve, lenticular solid state laser; Luminescent device is integrated on the block semiconductor chip, or is distributed on the substrate 21.The laser diode or the edge-lit led array that produce marshalling through identical technological process are suitable for producing in enormous quantities, and the photoelectric characteristic of each luminotron is very consistent.The arrow direction is the light exit direction.
The luminotron 22 of a plurality of Red Green Blues of colored hair light pipe array chip 18 usefulness is crisscross arranged equidistantly and makes on a substrate 21.As shown in Figure 3: the arrow direction is the light exit direction.Luminotron 22 adopts laser diode chip or edge-lit led chip.R is expressed as that red luminotron, G are expressed as green luminotron, B is expressed as the blue-light-emitting pipe.At present, the luminotron of three kinds of colors is integrated on the block semiconductor also relatively difficulty, along with development of semiconductor, new technology can be integrated in trichromatic luminotron on a slice integrated circuit, makes colored hair light pipe array chip.
When luminous tube array 13 was made of a monochromatic luminous tube array sheet 17, projected image was a monochrome image.When luminous tube array 13 is made of a colored hair light pipe array chip 18, must adopt special luminotron modulator approach to form colour projection's image, be that example describes with the colored hair light pipe array chip 18 with 6 luminotrons shown in Figure 3 below: plane mirror is when a side of lens combination 12 turns over, 6 chromoscan lines appear on the screen, when a side of lens combination 12 turns over, these 6 sweep traces will single-frame move down simultaneously the plane mirror that gradually changes when 9 inclination angles one by one.As shown in Figure 6: there are 9 numerals the top of Fig. 6, represents 9 plane mirrors respectively, 6 circles is arranged below each numeral, represents the upright position of the sweep trace that 6 luminotrons form on screen 16 respectively, the letter representation color in the circle; There are 12 numerals on the left side of figure, represents 12 positions of vertical direction on the screen 16 respectively.During the scanning of the 1st facial plane reflective mirror, 1 a blue sweep trace occurs in the upright position, during the scanning of the 4th facial plane reflective mirror, 1 a green sweep trace occurs in the upright position, during the scanning of the 7th facial plane reflective mirror, 1 a red sweep trace occurs in the upright position, and the sweep trace of three kinds of colors carries out superimposed on sequential, formed the sweep trace of a colour, can know all the other the 2nd to the 12nd chromoscan lines by inference according to figure and how to form.
With a monochromatic luminous tube array sheet 17 or the luminous tube array 13 that colored hair light pipe array chip 18 constitutes, very little because of it is carefully thin to the amount of blocking of light, can directly be positioned on the optical axis of optical lens group 12 sides.As shown in Figure 7: normally luminous tube array 13 is arranged among the light source box 50, for the heat radiation of strengthening luminous tube array 13 and the working environment that cleaning is provided, light source box 50 is connected with the cooling system of a sealing, cooling system comprises light source box 50, ventilation duct 60 and 61, one heating radiators 58 and a fan 59; Luminous tube array 13 is positioned at the centre of light source box 50.Light source box 50 comprises the light inlet window of being made by sheet glass or lens 52 and 53, and ventilation connects 56 and 57 and electric signal joints 54; Ventilation interface 56 and 57 links ventilation duct 60 and 61 respectively.Luminous tube array 13 is connected with electric signal joint 54; Increase an electric signal joint 55 at opposite side in the time of necessary.The effect of front window 52 and rear window 53 is printing opacities, constitutes with sheet glass or optical lens.As shown in Figure 8: fan rotates and forms airflow flowing, and the heat of luminous tube array 13 is taken out of, and temperature reduces during hot-air process heating radiator 58.
The another kind of form of luminous tube array 13 comprises 84, one lens 83 of an elongated reflective mirror and a luminous tube array combination 80; Luminous tube array combination 80 comprises three monochromatic luminous tube array sheet 17R of red, green, blue, 17G, 17B, and two dichroic beam splitter sheets 81 and 82; Luminous tube array combination 80 images on the reflective surface of elongated thin reflective mirror 84 through lens 83, but forms the colored hair light pipe array of a modulates color.The volume of colored hair light pipe array combination 80 is big, can not directly be positioned on the optical axis of optical lens group 12 sides, need an elongated thin reflective mirror 84 to be positioned on the optical axis of optical lens group 12 sides, indirectly colored hair light pipe array is placed on the optical axis of optical lens group 12 sides.As shown in Figure 9: the light that is sent by colored hair light pipe array combination 80 images in through lens 83 on the reflective surface of elongated thin reflective mirror 84, and the light that reflects through thin reflective mirror 84 enters optical lens group 12.Also have many known technologies can make three trichromatic monochromatic luminous tube array sheet combinations.Under the situation of physical space deficiency, can also use other optical device attachment lens 83 imagings.
The another embodiment of elongated reflective mirror is to constitute with a prism module 85 and an elongated reflective coating; Prism module 85 is to be formed by reflective prism 86 and printing opacity prism 87 gummeds, and two printing opacity end faces that constituted are transmission planes; The light inlet face of reflective prism 86 is transmission planes; Elongated reflective coating is positioned on the gummed end face of reflective prism 86 or printing opacity prism 87.Glue together with transparent optical cement between prism 86 and the prism 87.Glued membrane 89 has good light transmission.
Because light concentrates on the elongated reflective coating to heavens, easily plated film is caused damage.The scheme of implementing elongated reflective mirror can also be to keep an elongated fully reflecting surface on the gummed end face of reflective prism.As shown in figure 10: prism module 85 is to be formed by reflective prism 86 and 87 two optical prism gummeds of printing opacity prism, two printing opacity end faces that constituted are transmission planes, the light inlet face of reflective prism 86 is transmission planes, elongated fully-reflected plane is located on the gummed end face of reflective prism 86, is carved with a stria 88 on the position corresponding to elongated fully-reflected plane on the gummed end face of printing opacity prism 87; When prism module 85 was glued together with reflective prism 86, optical cement was not coated with into stria 88 and fully-reflected plane, and fully reflecting surface can bear high-intensity laser radiation.
Prism module 85 has certain mechanical strength, is beneficial to process and assemble, realizes purpose of design of the present invention.
As shown in figure 12: preferred embodiment of the present invention is that the binding of carrying between mirror wheel dish 72 and the described drive motor 70 is realized by a flexible connector 71; The center fixation of flexible connector 71 links the rotating shaft of drive motor 70; Fixedly connected year mirror wheel dish 72 in edge of flexible connector 71; A Balance Control combination is arranged between base 77 and year mirror wheel dish 72; When the Balance Control combination quits work, carry mirror wheel dish 72 and closely contact with stop device 76.Balance Control combination comprises 73, one minute surface obliquity sensors 90 of 75, three range sensors of a magnetic conduction annulus and at least three s' electromagnet 74; Magnetic conduction annulus 75 is fixed on and carries mirror wheel dish 72 bottoms., its center of circle is positioned on the rotation that carries mirror wheel dish 72; Magnetic conduction annulus 75 has a smooth end face near a side of range sensor 73; Range sensor 73, electromagnet 74, drive motor 70 and stop device 76 are arranged on the same base 77; The direction of the attractive force that 74 pairs of magnetic conduction annulus of electromagnet 75 produce is parallel with the rotation of drive motor 70.
A gap is arranged between range sensor 73 and the magnetic conduction annulus 75, and range sensor 73 is measured this clearance distance.In the time of necessary, a snubber assembly is set between drive motor 70 and the base 77.Minute surface obliquity sensor 90 is positioned at plane mirror group 11, is connected on the base 77 by a firm interface unit.
To carry mirror wheel dish 72 and plane mirror group 11 in order protecting, also to be provided with a stop device 76 on the base 77; A kind of embodiment of stop device 76 is: three anchor point are evenly distributed in the edge that carries mirror wheel dish 72; When the Balance Control combination quits work, the elastic force of flexible connector 71 will carry mirror wheel dish 72 and hold out against on stop device 76; On the stop device 76 steamboat is housed, allows the mirror wheel dish 72 that carries of rotation can safety stop.If there is not this stop device 76, after projection arrangement quits work, the plane mirror group 11 that flexible connector 71 links is unsettled, because the elasticity of flexible connector 71 itself, when projector is given a shock, plane mirror group 11 also will produce vibration, arrive certain degree when this vibration is big, and plane mirror group 11 will be damaged.Another purpose of stop device 76 is, when sudden power or Balance Control combination are broken down, provides protection to carrying mirror wheel dish 72 and plane mirror group 11.
The Balance Control combination is work like this: projection arrangement is when starting working, electric current in the electromagnet 74 progressively increases, the attractive force that 74 pairs of electromagnet have magnetic conduction annulus 75 generations of very high magnetic property makes year mirror wheel dish 72 break away from stop devices 76, and the direction of attractive force is parallel with the rotation of drive motor 70; Then drive motor 70 drive year mirror wheel dishes 72 begin rotation, and in initial rotary course, control program is discerned the alignment error of each plane mirror by sensor.According to these errors, control program calculates the target trajectory that carries 72 operations of mirror wheel dish; Periodically the sample measured value of three range sensors 73 of control program, calculate the vergence direction and the degree of tilt of carrying mirror wheel dish 72, and calculate the actual motion track that carries mirror wheel dish 72, the attractive force of 74 pairs of magnetic conduction annulus 75 of control program periodic variation electromagnet, control is carried mirror wheel dish 72 and is moved on target trajectory.When carrying mirror wheel dish 72 when target trajectory moves, during each plane mirror process optical lens group 12, on screen 16, can form one group of accurately sweep trace of location.The inclination angle of minute surface obliquity sensor 90 monitoring plane mirrors, the upright position of measured value reflection sweep trace on screen 16 at inclination angle, when measurement result and desired value have than mistake, control program is just controlled in real time by 74 pairs of operations of carrying mirror wheel dish 72 of electromagnet, allow the measured value at inclination angle near desired value, and revise the target trajectory that carries 72 operations of mirror wheel dish.
Minute surface obliquity sensor 90 is used for the reflective mirror inclination angle of measurement plane reflective mirror group 11, just the angle of the plane of reflective mirror and drive motor 70 rotations.The plane mirror inclination angle directly influences the position of sweep trace at screen 16.If there is deviation at the plane mirror inclination angle, just can not obtain sweep trace accurately.In the process of scanning, if plane mirror inclination angle instability then unsettled sweep trace can occur.The inclination angle of measurement plane reflective mirror and it is accurately controlled is extremely important to forming steady and audible projected image exactly.
As shown in figure 13: minute surface obliquity sensor 90 preferred embodiments comprise: the equally distributed curved surface light source 91 of brightness, the crooked anti-dazzling screen 96 that the shading edge is straight, 93, one daylighting films 94 of 92, one rectangle lightlng holes of lens and a photoelectric sensor 95; The light of curved surface light source 91 penetrates the reflective mirror of directive plane mirror group 11 from the light inlet window of anti-dazzling screen 96; The shading edge of anti-dazzling screen 96 is positioned on the plane; This plane is vertical with the rotation of drive motor 70, and with the optical axis coincidence of lens 92; On the optical axis that is centered close to lens 92 of rectangle lightlng hole 93, and its long limit is parallel with the rotation of drive motor 70.Daylighting film 94 is adjacent to rectangle lightlng hole 93; Photoelectric sensor 95 is arranged in the darkroom of daylighting film 94 back face seals.
Curved surface light source 91 adopts EL or other face luminescent materials, places the anti-dazzling screen 96 of a bending in the front of curved surface light source 91, and anti-dazzling screen 96 usefulness transparent film materials are made.Print a photomask with camera technique or accurate printing technology on film, one or more light inlet windows are arranged on the photomask, each light inlet window all has a straight flange to be positioned at same plane, constitutes the shading edge; In the time of necessary, the part of corresponding lens 92 is not printed light shield layer in the middle of the anti-dazzling screen 96; Anti-dazzling screen 96 is bent to a special surface, in the time of before the reflective mirror of plane mirror group 11 is positioned at minute surface obliquity sensor 90, the shading edge of anti-dazzling screen 96 is through plane mirror and lens 92, blur-free imaging on daylighting film 94 corresponding to the part of lightlng hole 93; When the plane mirror inclination angle changes, the image space of shading edge on daylighting film 94 of anti-dazzling screen 96 is along with moving, illuminating area on the daylighting film 94 changes, and control circuit calculates the plane mirror inclination angle according to the illuminating area that photoelectric sensor 95 records on the daylighting film 94.
Minute surface rotary angle transmitter 100 is used for the measurement plane reflective mirror anglec of rotation; When plane mirror was vertical with the axis of this sensor, signal of this sensor output after microprocessor receives this signal, started driving circuit at once and begins scanning, in the prior art, and the existing multiple sensor that can realize this purpose.As shown in figure 14: minute surface rotary angle transmitter preferred embodiment of the present invention comprises 103, one long narrow square lightlng holes 108 of 107, one lens of 101, one thin light holes of a luminotron and a photoelectric sensor 102; The light that luminotron 101 sends passes light hole 107, forms fine luminous point.When the reflective mirror of plane mirror group 11 is positioned at the position of setting; The imaging of thin light hole 107 is positioned at long narrow square lightlng hole 108; Photoelectric sensor 102 is passed to control circuit with the photoinduction signal, and lightlng hole 108 is very narrow, therefore can accurately record the corner of plane mirror.The long limit of lightlng hole 108 and drive motor parallel axes, when plane mirror had some inclination angles, the minute surface rotary angle transmitter also can accurately detect.
Projection arrangement of the present invention needs a Circuits System to support.Circuits System has many kinds of embodiments, below in conjunction with preferred embodiment shown in Figure 15, the structure and the principle of work of Circuits System is described.The entire circuit system comprises a control circuit and video signal processing circuit.Video signal processing circuit comprises a decoding circuit again, a bus switch, two image buffers and three driving circuits.The function of control circuit is detection plane reflective mirror group 11 operation conditionss and the operation of plane mirror group 11 is controlled.Control circuit is also coordinated collaborative work between decoding circuit, bus switch and the driving circuit.Decoding circuit is decoded to the digital video signal of input, or the analog video signal of input is encoded, and stores the image that obtains in two video memories one through bus switch.The effect of bus switch is to switch two video memories to be connected with bus between decoding circuit and the driving circuit, and when bus switch was in first state, the data bus of video memory 1 was connected on three driving circuits; Simultaneously, the data bus of video memory 2 is connected with decoding circuit with address bus.When bus switch was in second state, the data bus of video memory 2 was connected on three driving circuits, and simultaneously, the data bus of video memory 1 is connected with decoding circuit with address bus.The purpose that adopts this scheme is to allow decoding and image demonstration work independently carry out.The refreshing frequency of screen picture is not subjected to the restriction of the decoding speed of decoding circuit, is not subjected to the restriction of video signal source frame rate yet.The function of driving circuit is to receive data from video memory, and data after the D/A conversion, are formed the luminous intensity of simulating signal modulator glow tube, or forms the fluorescent lifetime of pulse signal modulation luminotron.
Control circuit also receives the signal of wheel disc alignment sensor, calculates the rotating speed that carries the mirror wheel dish and rotating speed is controlled, and also judges it is that the luminous mirror of which face will be through lens combination 12, decides with this which parts of images data is delivered to driving circuit.
When the drive motor rotating speed correct, control circuit sends a decoded signal to decoding circuit when carrying the mirror wheel dish and operating on the target trajectory, after decoding circuit deposits image in a video memory, beam back a ready signal to control circuit, control circuit sends switching signal to bus converting circuit, change the bus connecting mode of two video memories, then, control circuit sends a decoded signal to decoding circuit, decoding circuit deposits another image in another video memory, beams back a ready signal after finishing; Control circuit is waited for the arrival of plane mirror angular signal after sending switching signal to bus converting circuit; After receiving this signal, control circuit calculates the numbering of plane mirror, and to bus converting circuit output row signal, bus converting circuit determines to extract from video memory the mode of data according to the capable signal that receives; Control circuit is to the bus converting circuit clock signal, and bus converting circuit takes out data and sends out on bus from video memory.Then, control circuit sends to three driving circuits and deposits signal in, deposits the data on the bus in each driving circuit; When the number that receives data when driving circuit was the same with the number of luminotron, control circuit was exported to three driving circuits and is lighted signal.The amount of sending out that driving circuit is modulated each luminotron according to the numerical value of the data of storage forms set of diagrams as sweep trace.When next plane mirror scanned, control circuit is modulator glow tube in the same way, formed another group image sweep trace.After control circuit has shown entire image, detect decoding circuit and whether transmitted ready signal, if do not receive ready signal, control circuit then shows existing image one time again, so repeat, up to receiving ready signal, after control circuit is received ready letter, send switching signal to bus converting circuit, change the bus connecting mode of two video memories, then, control circuit sends a decoded signal to decoding circuit, and control circuit comes to this continuously picture decoding and is shown on the screen.
The advantage of image projection device of the present invention is to be easier to processing and manufacturing, thereby processing cost is reduced greatly.
Claims (13)
1. image projection device that constitutes with the rotating mirror group, comprising: power supply, signal of video signal input interface, video signal processing circuit, control circuit, drive motor (70), optical lens group (12) and image reflective mirror (14) is characterized in that:
The plane mirror group (11) and the luminous tube array (13) that also comprise a rotatable annular spread along line spread; Described plane mirror group (11) is installed in one and carries on the mirror wheel dish (72), and the reflective surface of each plane mirror all keeps identical distance towards the rotation that carries mirror wheel dish (72) and with rotation; Optical lens group (12), luminous tube array (13) and image reflective mirror (14) are positioned within the physical space that plane mirror group (11) surrounds and fixedly install; One end of optical lens group (12) is near the reflective mirror of plane mirror group (11), and luminous tube array (13) is arranged on the optical axis of optical lens group (12) other end; The orientation of the luminotron of luminous tube array (13) is parallel with the rotation of drive motor (70); The rotating shaft of drive motor (70) is attached at the center of carrying mirror wheel dish (72) and vertical with the baseplane of carrying mirror wheel dish (72); Video signal processing circuit is also controlled and plane mirror keeps synchronously in the position of the plane mirror of control circuit detection plane reflective mirror group (11); Video signal processing circuit control luminous tube array (13) is gone up the luminous intensity of each luminotron; The optical lens group (12) of light by luminous tube array (13) outgoing by fixing, a direct reflection through Plane of rotation reflective mirror group (11), pass optical lens group (12) again,, finally go up and focus on the luminous point that forms motion at screen (16) through image reflective mirror (14) reflection.
2. the image projection device that constitutes with the rotating mirror group according to claim 1, it is characterized in that: the luminotron (22) of described luminous tube array (13) can be modulated luminescent device by the little light-emitting area of high brightness and constitute; These luminescent devices comprise the LED of laser diode, edge-lit and have light valve, lenticular solid state laser; Luminescent device is integrated on the block semiconductor chip, or is distributed on the substrate (21).
3. the image projection device that constitutes with the rotating mirror group according to claim 1 is characterized in that: the binding between described year mirror wheel dish (72) and the described drive motor (70) is realized by a flexible connector (71); The center fixation of flexible connector (71) links the rotating shaft of drive motor (70); Fixedly connected year mirror wheel dish (72) in edge of flexible connector (71); A Balance Control combination is arranged between base (77) and year mirror wheel dish (72); When the Balance Control combination quits work, carry mirror wheel dish (72) and closely contact with stop device (76).
4. the image projection device that constitutes with the rotating mirror group according to claim 3, it is characterized in that: described Balance Control combination comprises a magnetic conduction annulus (75), three range sensors (73), a minute surface obliquity sensor (90) and at least three s' electromagnet (74); Magnetic conduction annulus (75) is fixed on the bottom of carrying mirror wheel dish (72), and its center of circle is positioned on the rotation that carries mirror wheel dish (72); Magnetic conduction annulus (75) has a smooth end face near a side of range sensor (73); Range sensor (73), electromagnet (74), drive motor (70) and stop device (76) are arranged on the same base (77); Electromagnet (74) is parallel with the rotation of drive motor (70) to the direction of the attractive force that magnetic conduction annulus (75) produces.
5. the image projection device that constitutes with the rotating mirror group according to claim 1, it is characterized in that: described luminous tube array (13) is arranged among the cooling system of a sealing, cooling system comprises a light source box (50), ventilation duct (60,61), a heating radiator (58) and a fan (59); Luminous tube array (13) is positioned at the centre of light source box (50).
6. the image projection device that constitutes with the rotating mirror group according to claim 5, it is characterized in that: described light source box (50) comprises the light inlet window of being made by sheet glass or lens (52,53), and a ventilation interface (56,57) and an electric signal joint (54); Ventilation interface (56,57) links ventilation duct (60,61) respectively.
7. the image projection device that constitutes with the rotating mirror group according to claim 1, it is characterized in that: described luminous tube array (13) comprises an elongated reflective mirror (84), lens (83) and a luminous tube array combination (80); Luminous tube array combination (80) comprises three monochromatic luminous tube array sheets of red, green, blue (17R, 17G, 17B), and two two look light splitting pieces (81,82); Luminous tube array combination (80) images on the reflective surface of elongated reflective mirror (84) through lens (83).
8. the image projection device that constitutes with the rotating mirror group according to claim 7, it is characterized in that: described elongated reflective mirror (84) comprises a prism module (85) and an elongated reflective coating; Prism module (85) is to be formed by reflective prism (86) and printing opacity prism (87) gummed, and two printing opacity end faces that constituted are transmission planes; The light inlet face of reflective prism (86) is a transmission plane; Elongated reflective coating is positioned on the gummed end face of reflective prism (86) or printing opacity prism (87).
9. the image projection device that constitutes with the rotating mirror group according to claim 7, it is characterized in that: described elongated reflective mirror (84) comprises a prism module (85) and an elongated fully-reflected plane; Prism module (85) is to be formed by reflective prism (86) and (87) two optical prism gummeds of printing opacity prism, and two printing opacity end faces that constituted are transmission planes; The light inlet face of reflective prism (86) is a transmission plane; Elongated fully-reflected plane is located on the gummed end face of reflective prism (86); Be carved with a stria (88) on the position corresponding to elongated fully-reflected plane on the gummed end face of printing opacity prism (87); When prism module (85) was glued together with reflective prism (86), optical cement only applied the part except that stria (88) and fully-reflected plane.
10. the image projection device that constitutes with the rotating mirror group according to claim 1 is characterized in that: the light filter film that different colours is arranged on the reflective mirror of described plane mirror group (11).
11. the image projection device that constitutes with the rotating mirror group according to claim 4, it is characterized in that: described minute surface obliquity sensor (90) comprising: the equally distributed curved surface light source of brightness (91), the crooked anti-dazzling screen (96) with straight shading edge, lens (92), a rectangle lightlng hole (93), a daylighting film (94) and a photoelectric sensor (95); The light of described curved surface light source (91) penetrates the reflective mirror of directive plane mirror group (11) from the light inlet window of anti-dazzling screen (96); The shading edge of described anti-dazzling screen (96) is positioned on the plane, and this plane is vertical with the rotation of drive motor (70), and with the optical axis coincidence of lens (92); On the optical axis that is centered close to lens (92) of described rectangle lightlng hole (93), and its long limit is parallel with the rotation of drive motor (70); Described daylighting film (94) is adjacent to rectangle lightlng hole (93); Described photoelectric sensor (95) is arranged in the darkroom of daylighting film (94) back face seal.
12. the image projection device that constitutes with the rotating mirror group according to claim 1 is characterized in that: in the physical space that described plane mirror group (11) is surrounded a minute surface rotary angle transmitter (100) is arranged; Minute surface rotary angle transmitter (100) comprises a luminotron (101), a thin light hole (107), lens (103), a long narrow square lightlng hole (108) and a photoelectric sensor (102); When the reflective mirror of plane mirror group (11) is positioned at the position of setting; The imaging of thin light hole (107) is positioned at long narrow square lightlng hole (108); The long center line of long narrow square lightlng hole (108) is parallel with the rotation of drive motor (70).
13. the image projection device that constitutes with the rotating mirror group according to claim 3 is characterized in that: a wheel disc alignment sensor (130) is arranged on described base (77).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152022 CN1261794C (en) | 2002-11-18 | 2002-11-18 | Image projecting equipment comprising rotating reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152022 CN1261794C (en) | 2002-11-18 | 2002-11-18 | Image projecting equipment comprising rotating reflector |
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| Publication Number | Publication Date |
|---|---|
| CN1501118A CN1501118A (en) | 2004-06-02 |
| CN1261794C true CN1261794C (en) | 2006-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02152022 Expired - Fee Related CN1261794C (en) | 2002-11-18 | 2002-11-18 | Image projecting equipment comprising rotating reflector |
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| CN (1) | CN1261794C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9104048B2 (en) * | 2012-01-25 | 2015-08-11 | International Business Machines Corporation | Three dimensional image projector with single modulator |
| CN102967376B (en) * | 2012-11-20 | 2014-10-15 | 中国科学院西安光学精密机械研究所 | Method for acquiring high-frequency image sequence and time-sharing light splitting device adopted by method for acquiring high-frequency image sequence |
| CN104991408B (en) * | 2015-07-10 | 2017-01-04 | 谢诚 | A kind of portable laser scialyscope |
| CN105116556B (en) * | 2015-10-08 | 2017-10-27 | 杭州中科极光科技有限公司 | A kind of shimming and eliminating coherence device |
| CN112610928B (en) * | 2017-02-16 | 2022-12-06 | 吴东辉 | Sunlight reflecting lamp |
| JP6673278B2 (en) * | 2017-03-30 | 2020-03-25 | 京セラドキュメントソリューションズ株式会社 | Optical scanning device, image forming device |
| CN108662536B (en) * | 2017-04-02 | 2024-03-26 | 吴东辉 | Two-axis scanning sunlight reflecting lamp |
| CN211627823U (en) * | 2018-09-28 | 2020-10-02 | 深圳市大疆创新科技有限公司 | Distance measuring device, distance detecting equipment and mobile platform |
| CN110460776B (en) * | 2019-03-19 | 2022-08-02 | 诚瑞光学(常州)股份有限公司 | Camera device with hand shake correction function |
| CN111474706B (en) * | 2020-05-13 | 2022-05-17 | 苏州路之遥科技股份有限公司 | Rotating curved surface reflection graph display method |
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2002
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