CN1591164A - Projecting lighting system and projecting lighting method thereof - Google Patents
Projecting lighting system and projecting lighting method thereof Download PDFInfo
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- CN1591164A CN1591164A CN 03156350 CN03156350A CN1591164A CN 1591164 A CN1591164 A CN 1591164A CN 03156350 CN03156350 CN 03156350 CN 03156350 A CN03156350 A CN 03156350A CN 1591164 A CN1591164 A CN 1591164A
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Abstract
The present invention relates to projection lighting system. It includes a light-conducting pipe and an optical circuit switching device with light-receiving region, The light-conducting pipe is placed in the optical cirucit between light source and optical circuit switching device. The light beam emitted by means of end face of light-conducting pipe can be income into the light-receiving region in the mode of that said light beam and plane normal of light receiving region are formed into a certain angle, and its producted projection pattern form can produce a tension change relatively to light-conducting pipe end face form along said off-axis angle change direction, and the end form of ligh- conducting pipe is a parallegram whose inner angle along off-axis angle direction is larger than adjacent inner angle.
Description
Technical field
The invention provides a kind of projecting illumination system, particularly a kind of projecting illumination system that can effectively improve illumination efficiency.
Background technology
Existing optical profile type projection display principle, be that the light beam that light source sends is projected to a light path switching device, light path switching device has the small light path switching device of a plurality of changeable light paths, and these small light path switching devices are combined into image, are projected to display screen via optical projection system again.Digital micro-mirror device (Digital Micromirror Device with Texas Instrument (TI) manufacturing; DMD) be example, it is made of a plurality of micro-reflector, by the selective control minute surface in two different angles of inclination, so that light beam is penetrating optical projection system (that is bright morphotype formula) and not penetrating switching mutually between optical projection system (that is the dark morphotype formula) two states, so as to changing the brightness of each pixel cell on the display.
Fig. 1 one comprises existing optical projection system 100 synoptic diagram of light path switching device 102, shows the light path when micro-reflector 102a angle of inclination is chosen as bright morphotype formula.As shown in Figure 1, the incident beam I that comes via illuminator after can reflecting via the micro-reflector 102a of light path switching device 102, enters into projection arrangement 106 by inner full-reflection prism 104.Generally speaking, high-visible for making projected picture, projection arrangement 106 needs to adopt one to go up (On-axis) design, that is the light beam that is come by micro-reflector 102a reflection, needs to enter wherein with the direction of parallel or approximate parallel projection device 106 optical axises.For satisfying this condition, via the incident beam I after inner full-reflection prism 104 reflections, need design to be incident to micro-reflector 102a in inclination certain angle θ mode, in other words, adopt the projecting illumination system design of micro-reflector 102a, incident beam I must adopt from axle (Off-axis) mode and enter light path switching device 102 with certain pitch angle.
Fig. 2 A is the synoptic diagram of an existing illuminator 110, show existing illuminator 110 its incident beams depart from light path switching device 102 optical receiving region plane normal one angle θ from axle incident situation.Fig. 2 B is a synoptic diagram, and the end face of display light conduit 114, incident beam are projected to the projective patterns of light path switching device 102 and the optical receiving region of light path switching device 102 via photoconductive tube 114 from axle respectively.In this example, optical receiving region is distributed in a surface of light path switching device 102.
Shown in Fig. 2 A, the light beam that light source 112 sends is assembled earlier to a photoconductive tube 114, photoconductive tube 114 peripheral walls are reflecting surface, and light beam penetrates equally distributed light beam by the photoconductive tube endpiece after reflective wall repeatedly reflects, be projected on the light path switching device 102 via relay len group 116 again.
As previously mentioned, incident beam must be adopted one and enters light path switching device 102 from axle (Off-axis) mode and can cause following shortcoming.When the incident beam of illuminator 110 departs from the one angle θ incident of light path switching device 102 normals, the projective patterns that incident beam produces on light path switching device 102 via the end face of photoconductive tube 114, with reference to figure 2B, it can produce a stretcher strain along off-axis angle θ change direction (being the angle direction of the normal direction of light path switching device 102 to illuminator 110 optical axises), and it is big more to work as the θ angle angle that departs from, and projective patterns is more obvious along the stretcher strain meeting of this off-axis angle θ change direction.Be depicted as example with Fig. 2 B, be generally the light path switching device 102 of rectangle for collocation, and when photoconductive tube 114 end faces are designed to rectangle, when incident beam was projected to light path switching device 102 through the rectangle end face of photoconductive tube 114, the projective patterns that should be rectangle originally was deformed into the parallelogram that does not wait at the adjacent angle because of the stretcher strain that causes from axle incident makes projective patterns.Therefore, the part projecting beam promptly can't enter in the optical receiving region of light path switching device 102, obviously causes the waste of light and illumination efficiency is reduced.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of projecting illumination system, it can guarantee that incident beam enters the optical receiving region of light path switching device fully and effectively improves illumination efficiency.
According to the present invention, provide a kind of projecting illumination system to comprise a light source, a photoconductive tube and have a light path switching device of optical receiving region.This optical receiving region is in order to receiving the light beam that a light source is sent, and this optical receiving region is a rectangle.Photoconductive tube is arranged at the light path between light source and light path switching device, and the light beam that sends through the photoconductive tube end face is incident to optical receiving region and forms a projective patterns in the mode that the plane normal with optical receiving region constitutes an off-axis angle.Consider that the relative photoconductive tube end surface shape of projective patterns shape changes in the stretching that produces along the off-axis angle change direction, the end surface shape that is characterized as photoconductive tube of the present invention, be a parallelogram based on rectangular light receiving area shaped design, it is big that the interior angle of this parallelogram off-axis angle direction is designed to more adjacent interior angle, and increase along the increase of this interior angle of this off-axis angle direction with this off-axis angle, identical to eliminate this shape stretching variable effect, to make its shape of projective patterns and the area that are projected to optical receiving region with optical receiving region essence.
The present invention also provides a kind of projecting illumination system, comprises:
One light path switching device has an optical receiving region; And
One photoconductive tube, has an end face, penetrate a light beam through this end face, this light beam constitutes an off-axis angle mode with the plane normal with this optical receiving region and is projected to this optical receiving region and forms a projective patterns, this photoconductive tube end face along the Diagonal Dimension on this off-axis angle direction less than all the other cornerwise sizes;
Wherein the shape of this projective patterns and area are identical with this optical receiving region essence.
By design of the present invention, consideration is from the angle situation of change of axle projection back actual pattern, when utilization designs the reversal deformation that end face carried out of photoconductive tube in advance, can offset projective patterns anamorphic effect fully from axle incident, obtaining actual projected its shape of pattern and area can the effect identical with optical receiving region, even also incident beam can enter the optical receiving region on the light path switching device fully, significantly improve illumination efficiency.
Description of drawings
Fig. 1 is the synoptic diagram of an existing optical projection system, shows the light path when the micro-reflector angle of inclination is chosen as bright morphotype formula.
Fig. 2 A is an existing illuminator synoptic diagram, the optical axis deviation optical receiving region plane normal one angle θ of display illumination system from axle incident situation.
Fig. 2 B is that cross section, the incident beam of display light conduit is projected to the projective patterns of light path switching device and the optical receiving region synoptic diagram of light path switching device via photoconductive tube from axle.
Fig. 3 is according to one embodiment of the invention, shows the synoptic diagram of a projecting illumination system.
Fig. 4 A is the synoptic diagram of the existing photoconductive tube end face design of explanation.
Fig. 4 B is the synoptic diagram of explanation photoconductive tube end face design of the present invention.
Fig. 5 is according to another embodiment of the present invention, shows the synoptic diagram of a projecting illumination system.
The element numbers explanation
10 projecting illumination systems
12 light sources
14 photoconductive tubes
16 light path turning devices
20 light path switching devices
20a light path switching device
22 projection arrangements
24 ellipsoidal reflectors
26 inner full-reflection prisms
28 relay len groups
30,30 ' projection end face
32,32 ' projective patterns
34 shape corrections elements
100 optical projection systems
102 light path switching devices
The 102a micro-reflector
104 inner full-reflection prisms
106 projection arrangements
110 illuminators
112 light sources
114 photoconductive tubes
116 relay len groups
Embodiment
Fig. 3 is according to one embodiment of the invention, shows the synoptic diagram of a projecting illumination system 10.As shown in Figure 3, projecting illumination system 10 comprises light source 12, photoconductive tube 14, light path turning device 16 and light path switching device 20, and light path switching device 20 has at least one light path switching device 20a.
Light source 12 is in order to provide illuminating ray to projecting illumination system 10.An optical collector can be set to converge the light beam that light source 12 is sent around light source 12, this optical collector is an ellipsoidal reflector 24 for example.Light path turning device 16 will be in order to being passed on the light path switching device 20 from the light beam of photoconductive tube 14.Light path turning device 16 is for example by being formed in order to the inner full-reflection prism 26 of change projecting direction and in order to the relay len group 28 of change projected dimension.Inner full-reflection prism 26 forms for the two prisms gummed of midfeather one air gap (Air Gap), by the total reflection of air gap and prism boundary so that light beam be projeced on the light path switching device 20.
Light path switching device 20, have a plurality of light path switching device 20a, this light path switching device 20a forms the optical receiving region of light path switching device 20, indivedual light paths by each light path switching device 20a are switched, and whether are projeced into the light beam of each light path switching device 20a towards projection arrangement 22 projections with control.Light path switching device 20 for example is digital micro-mirror device (DigitalMicromirror Device; DMD) or reflective type silicon-based liquid crystal (Liquid Crystal onSilicon; LCoS).In addition, when aforementioned light beam was projeced into each light path switching device 20a, the normal direction of this light beam and light path switching device 20a was formed with an angle, and this angle is aforesaid off-axis angle θ.
Photoconductive tube 14 in order to the light beam of reception from light source 12, and penetrates equally distributed light beam.Photoconductive tube 14 peripheral walls are reflecting surface, and light beam repeatedly reflects through reflective wall after the incident end face of photoconductive tube 14 is injected, and the projection end face by photoconductive tube 14 penetrates equally distributed light beam again.Afterwards, this light beam shines on the light path switching device 20a of light path switching device 20 in the mode of off-axis angle θ.
Of the present invention when being characterized as the light beam irradiates that penetrates from photoconductive tube 14 in light path switching device 20, the projected area of this light beam is consistent with light path switching device 20a with shape.For reaching this purpose, photoconductive tube 14 projection end surface shape of the present invention are designed in advance along the inside compression section size of off-axis angle θ direction, and are deformed into along the big parallelogram of the more adjacent interior angle of interior angle of off-axis angle direction.The light beam that penetrates when photoconductive tube 14 like this be able to be offset the change of shape effect when axle throws with when the axle projection way is projeced into light path switching device 20, and its projected area and shape can be consistent with light path switching device 20a.
The following difference that specifies existing photoconductive tube 114 and photoconductive tube 14 of the present invention with an example.In this example, off-axis angle θ is 24 degree, be covered with on light path switching device 20,102 surfaces as light path switching device 20a, the 102a of optical receiving region, and its optical receiving region is shaped as rectangle.Please be simultaneously with reference to Fig. 2 B and Fig. 4 A, the rectangle that is shaped as interior angle angle [alpha], β=90 degree of the projection end face 30 of photoconductive tube 114, the projective patterns 32 that it projected can produce a stretcher strain along off-axis angle θ change direction, and makes projective patterns 32 be stretched as the parallelogram of interior angle angle [alpha] '=88 degree and interior angle angle beta '=92 degree.Under this kind situation (that is, when using existing photoconductive tube),, and then reduce its illumination efficiency because projective patterns 32 is greater than the optical receiving region of light path switching device 102, thereby causes segment beam not to be projeced on the light path switching device 102.
Therefore, please also refer to Fig. 3 and Fig. 4 B, the projection end face 30 ' of photoconductive tube 14 of the present invention carries out reverse shape change in advance, so that the pattern 32 ' of projection and the shape and the area of light path switching device 20 fit like a glove.With above-mentioned example, projection end face 30 ' changes to β ', α ' respectively with interior angle angle [alpha], the β of the end face 30 shown in Fig. 4 A, the 90 degree α angles that also are about to originally change to the 92 β ' angles of spending, originally 90 degree β angles change to the α ' angle of 88 degree, and projection end face 30 ' is become along the big parallelogram of the more adjacent interior angle of interior angle of off-axis angle direction.That is, along on the off-axis angle θ change direction, end face 30 ' can shorten size d in original dimension D, make end face 30 ' its Diagonal Dimension shorter than another diagonal line along off-axis angle θ change direction, when light beam after end face 30 ' penetrates, because of projective patterns 32 ' can produce a stretcher strain along off-axis angle θ change direction, be about 90 degree and the equal rectangle of two Diagonal Dimension essence and make projective patterns 32 ' stretching be changed to angle, the shape of this shape and light path switching device 20 matches, and can obtain to avoid the effect of beam energy waste and then improve illumination efficiency.
Therefore, as shown in Figure 3, after light beam sends via the projection end face of photoconductive tube 14, can enter inner full-reflection prism 26 again via relay len group 28 earlier, the total reflection of generation at the interface in prism and clearance, this moment, reflected light was to be incident on the light path switching device 20 from the axle mode.By design of the present invention, utilize in advance projection deformation design that end face carries out to photoconductive tube, can offset light beam fully after total reflection prism 26 reflections, be incident to the projective patterns anamorphic effect that light path switching device 20 produces from axle, obtaining actual projected its shape of pattern and area can the effect identical with optical receiving region, even also the incident beam that comes through photoconductive tube can enter the optical receiving region on the light path switching device fully, significantly improve illumination efficiency.Moreover, when when the axle incident angle increases, its stretcher strain meeting along the off-axis angle direction of projective patterns is more obvious as can be known for people, therefore the photoconductive tube end face of parallelogram should be designed to increase with the increase of this off-axis angle along the interior angle of this off-axis angle direction, in other words, the photoconductive tube end face should be designed to reduce with the increase of this off-axis angle along the Diagonal Dimension on the off-axis angle direction, guarantees that the shape of projective patterns and area are identical with this optical receiving region.
Those of ordinary skills are when understanding, and the present invention changes the way of photoconductive tube end surface shape in advance, complete light path switching device applicable to the different optical receiving region shapes of tool.Only need adjust the angle of photoconductive tube end face or the amplitude of size institute change relatively, can reach counteracting and make the projecting beam of photoconductive tube enter optical receiving region fully from the anamorphic effect of axle projection at difform optical receiving region.For example, during the parallelogram profile that if the optical receiving region of light path switching device is an adjacent angle not to be waited, the rectangular light pipes end face that then can adopt a tool respective corners to change, this rectangular light pipes end face can be changed to the parallelogram that does not wait at an adjacent angle through the actual projected pattern after the axle projection, and can make projecting beam enter optical receiving region fully.
Moreover, the mode of revising the photoconductive tube end surface shape does not limit, for example can when making photoconductive tube, directly change incident beam in the exit end face shape of photoconductive tube, or can be as shown in Figure 5, connect in addition a shape corrections element 34 on end face also can, shape corrections element 34 can be a for example inner full-reflection assembly.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim scope of the present invention its equivalent modifications of carrying out or change.
Claims (10)
1. projecting illumination system is characterized in that comprising:
One light path switching device has an optical receiving region, and this optical receiving region is in order to receiving the light beam that a light source is sent, and this optical receiving region is a rectangle; And
One photoconductive tube, be arranged at the light path between this light source and this light path switching device, this light beam that sends through this photoconductive tube one end face constitutes an off-axis angle mode with the plane normal with this optical receiving region and is projected to this optical receiving region and forms a projective patterns, this photoconductive tube end surface shape one parallelogram, and this parallelogram is big along the more adjacent interior angle of interior angle of this off-axis angle direction;
Wherein this parallelogram increases along the increase with this off-axis angle of this interior angle of this off-axis angle direction, and the shape of this projective patterns and area are identical with this optical receiving region essence.
2. projecting illumination system according to claim 1, it is characterized in that also comprising a light path turning device, be arranged on the light path between this photoconductive tube and this light path switching device, this light path turning device is the combination of an inner full-reflection prism and a relay len group, and this light beam that this photoconductive tube end face sends is projected to this optical receiving region from axle after this inner full-reflection prism reflection.
3. projecting illumination system according to claim 1 is characterized in that also comprising an ellipsoidal reflector and is arranged at around this light source, with this beam convergence that this light source was sent other end to this photoconductive tube.
4. projecting illumination system according to claim 1, wherein this light path switching device is a digital micro-mirror device or a reflective type silicon-based liquid crystal.
5. projecting illumination system is characterized in that comprising:
One light path switching device has an optical receiving region; And
One photoconductive tube, has an end face, penetrate a light beam through this end face, this light beam constitutes an off-axis angle mode with the plane normal with this optical receiving region and is projected to this optical receiving region and forms a projective patterns, this photoconductive tube end face along the Diagonal Dimension on this off-axis angle direction less than all the other cornerwise sizes;
Wherein the shape of this projective patterns and area are identical with this optical receiving region essence.
6. projecting illumination system according to claim 5 is characterized in that this photoconductive tube end face reduces along the increase of the Diagonal Dimension on this off-axis angle direction with this off-axis angle.
7. projecting illumination system according to claim 5 it is characterized in that this optical receiving region is shaped as rectangle, and this photoconductive tube end surface shape is the parallelogram that does not wait at the adjacent angle.
8. projecting illumination system according to claim 5 it is characterized in that this optical receiving region is shaped as the parallelogram that does not wait at the adjacent angle, and this photoconductive tube end surface shape is a rectangle.
9. projection lighting method comprises following steps:
In a light source and the light path that has between a light path switching device of a rectangular light receiving area one photoconductive tube is set;
Light beam that will be by this photoconductive tube end face constitutes an off-axis angle mode with the plane normal with this optical receiving region and is incident to this optical receiving region and forms a projective patterns, and this projective patterns shape this end surface shape relatively stretches and changes in produce one along this off-axis angle change direction; And
This photoconductive tube end surface shape is taken as a big parallelogram of the more adjacent interior angle of interior angle along this off-axis angle direction, changes and make the shape of this projective patterns and area identical with this optical receiving region essence to offset this stretching.
10. projection lighting method according to claim 9 is characterized in that the change of shape of this photoconductive tube end face, is to finish by this end face being connected a shape corrections element that is made of the inner full-reflection assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03156350 CN1591164A (en) | 2003-09-04 | 2003-09-04 | Projecting lighting system and projecting lighting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03156350 CN1591164A (en) | 2003-09-04 | 2003-09-04 | Projecting lighting system and projecting lighting method thereof |
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| CN1591164A true CN1591164A (en) | 2005-03-09 |
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| CN 03156350 Pending CN1591164A (en) | 2003-09-04 | 2003-09-04 | Projecting lighting system and projecting lighting method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449620C (en) * | 2006-01-12 | 2009-01-07 | 索尼株式会社 | Optical pickup and optical information apparatus |
| CN102419814A (en) * | 2005-10-24 | 2012-04-18 | 科格内克斯科技和投资公司 | Integrated illumination assembly for symbology reader |
| CN104461003A (en) * | 2014-12-11 | 2015-03-25 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN108353154A (en) * | 2015-10-27 | 2018-07-31 | 麦克赛尔株式会社 | Projecting apparatus, image display and image display method |
| JP2019144394A (en) * | 2018-02-20 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Device and projection type display device |
| CN112628679A (en) * | 2020-12-11 | 2021-04-09 | 杭州新湖电子有限公司 | Combined luminous film photography lamp |
-
2003
- 2003-09-04 CN CN 03156350 patent/CN1591164A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419814A (en) * | 2005-10-24 | 2012-04-18 | 科格内克斯科技和投资公司 | Integrated illumination assembly for symbology reader |
| CN100449620C (en) * | 2006-01-12 | 2009-01-07 | 索尼株式会社 | Optical pickup and optical information apparatus |
| CN104461003A (en) * | 2014-12-11 | 2015-03-25 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN104461003B (en) * | 2014-12-11 | 2019-02-05 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN108353154A (en) * | 2015-10-27 | 2018-07-31 | 麦克赛尔株式会社 | Projecting apparatus, image display and image display method |
| JP2019144394A (en) * | 2018-02-20 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Device and projection type display device |
| CN112628679A (en) * | 2020-12-11 | 2021-04-09 | 杭州新湖电子有限公司 | Combined luminous film photography lamp |
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