CN104516181A - Lighting system, projector and back projection system - Google Patents
Lighting system, projector and back projection system Download PDFInfo
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- CN104516181A CN104516181A CN201410780440.3A CN201410780440A CN104516181A CN 104516181 A CN104516181 A CN 104516181A CN 201410780440 A CN201410780440 A CN 201410780440A CN 104516181 A CN104516181 A CN 104516181A
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- attenuator
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
Abstract
The invention relates to the field of projection, in particular to a lighting system, a projector and a back projection system. The lighting system comprises at least RGB (red green blue) LED light sources, at least three first collimating lens sets, a dichroic mirror, a converging lens set, a diaphragm, an optical integrator rod and an attenuator; the converging lens set, the diaphragm, the optical integrator rod and the attenuator are disposed in order; the RGB LED light sources correspond to the first collimating lens sets, respectively; light from each light source passes the corresponding first collimating lens set and is mixed by the dichromic mirror; mixed light passes the converging lens set, the diaphragm and the optical integrator rod in order and enters the attenuator; the attenuator allows the light to attenuate gradually from the surrounding to the center to form beams gradually darkening from the surrounding to the center. At the premise of ensuring relative uniformity of lighting spots, energy loss of light with different ranges of incident angles can be directionally compensated, brightness uniformity of an emergent screen is improved, and the problem that unit display of an existing projection tiled display has dark sides and corners is solved.
Description
Technical field
The present invention relates to projection field, more specifically, relate to a kind of illuminator, projector and back-projection system.
Background technology
In recent years, DLP(Digital Light Processing) projection display market development is very swift and violent, plays an important role in many industries such as power industry, coal industry, traffic department, public security department, conference centre, exhibition center and place.
Product needed is constantly improved and is optimized, and DLP combination, as comparatively ripe product, equally also has the place needing to improve.In the DLP combination of practical application, the problem at the dark angle of dark side in the display of ubiquity unit, and more obvious this phenomenon is larger in unit screen size, screen gain is higher, directly affects consistance and the integrality of tiled display.The main cause of dark side dark angle problem is that the illumination spot of existing projector is generally more high better according to homogeneity when designing, be infinitely close to and very design, the illumination that have ignored projector's outgoing on screen after, because the incident angle entering the light of screen is different, actual transmitted light and the ratio of reflected light there are differences, particularly in short burnt back projection display, projector distance is shorter, and the incident angle of marginal ray is relatively large especially.Incident angle is larger, and the reflectivity of light is higher, and luminous energy loss is larger, the light reflected into screen is fewer, marginal ray is comparatively large due to incident angle, so the light opposed central regions reflected into screen will be lacked, causes the problem that visually unit shows the dark angle of dark side.
Summary of the invention
The present invention, for overcoming at least one defect (deficiency) described in above-mentioned prior art, provides a kind of illuminator, is applied to field of projection display and can solves the problem that the display of unit in existing projection tiled display exists the dark angle of dark side.
The present invention also provides a kind of projector, is applied to field of projection display and can solves the problem that the display of unit in existing projection tiled display exists the dark angle of dark side.
The present invention also provides a kind of back-projection system, there is the problem at the dark angle of dark side to solve unit display in existing projection tiled display.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
A kind of illuminator, comprise at least R, G, B three-color LED light source, the plus lens group, diaphragm, optical integral rod and the attenuating device that also comprise at least three group first collimation lens set, dichronic mirror and place in turn, each corresponding one group of first collimation lens set of R, G, B LED light source, the light that each light source sends carries out mixed light through dichronic mirror after the first respective collimation lens set; Mixed light enters in attenuating device through plus lens group, diaphragm, optical integral rod successively, and attenuating device makes light obtain from four circumferential centers in light beam dimmed gradually from four Zhou Dao center gradual change decay.
In illuminator of the present invention, R, G, B three-color LED light source expands through the first collimation lens set original LED light Shu Jinhang and collimates, and reaches the object reducing the angle of divergence, promote the depth of parallelism, three coloured light carry out mixed light process through dichronic mirror afterwards, RGB tri-coloured light is focused on diaphragm place respectively by mixed light beam under the effect of plus lens group, ray cast is entered optical integral rod again by the focus point at diaphragm place, mixed light and integration Homogenization Treatments is carried out in optical integral rod, after attenuating device, decay hot spot is being produced at illuminated area from the light of optical integral rod exit portal outgoing, this decay hot spot is dimmed gradually from four circumferential centers, this decay hot spot can by projection lens projects on screen, under the prerequisite of relative homogeneity ensureing illumination spot, directed can make up the light ray energy loss of different range incident angle, the brightness uniformity of outgoing screen is promoted, solve unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
A kind of projector, comprise power-supply system, the driving control system be connected with power-supply system and optical projection system, it is characterized in that, comprise illuminator described above, illuminator is connected with power-supply system, driving control system, and in illuminator, the light beam of outgoing enters in optical projection system.
Above-mentioned illuminator can obtain from four circumferential centers decay hot spot dimmed gradually, this decay hot spot is applied in projector, then by projector in projection screen, the luminous energy differential loss that crevice projection angle brings can be made up, the brightness uniformity of outgoing screen is promoted, solves unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
A kind of back-projection system, comprise rear projection screen, also comprise projector described above, the ray cast of outgoing in projector is on rear projection screen.
The decay hot spot cast out in above-mentioned projector is dimmed gradually from four circumferential centers, this decay hot spot is projected in rear projection screen, the luminous energy differential loss that crevice projection angle brings can be made up, the brightness uniformity of outgoing screen is promoted, solves unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of illuminator specific embodiment 1 of the present invention.
Fig. 2 is the Illumination Distribution schematic diagram in embodiment of the present invention 1-3 on illuminated area and DMD.
Fig. 3 is the structural representation of a kind of illuminator specific embodiment 2 of the present invention.
Fig. 4 is the structural representation of attenuator in a kind of illuminator specific embodiment 2 of the present invention.
Fig. 5 is the structural representation of a kind of illuminator specific embodiment 3 of the present invention.
Fig. 6 is the structural representation of polaroid in a kind of illuminator specific embodiment 3 of the present invention.
Wherein, 1 is red LED light source 1, and 2 is the first collimation lens set, and 3 is green LED light source, 4 is blue led light source, and 5 is dichronic mirror, and 6 is plus lens group, 7 is diaphragm, and 8 is optical integral rod, and 9 is attenuator, 10 is illuminated area, and 11 is relay lens group, and 12 is DMD, 13 is the second collimation lens set, and 14 is polarization conversion system, and 15 is polaroid, 16 is attenuating device, and 17 is light vector direction of vibration, and 18 is square hot spot.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as the quantity of instruction or hint relative importance or implicit indicated technical characteristic.Thus, one or more these features can be expressed or impliedly be comprised to the feature of " first ", " second " of restriction.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also can be indirectly connected by intermediary, the connection of two element internals can be said.For the ordinary skill in the art, concrete condition above-mentioned term can be understood at concrete meaning of the present invention.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
The invention provides a kind of illuminator, a kind of projector and a kind of back-projection system, under the relatively uniform prerequisite ensureing illumination spot, orientation makes up the light ray energy loss of different range incident angle, before realizing screen, brightness is high-homogenized, thorough solution display dark side dark angle problem, illustrates especially by following embodiment.
Embodiment 1
As shown in Figure 1, be the structural representation of a kind of illuminator specific embodiment of the present invention.See Fig. 1, a kind of illuminator of the specific embodiment of the invention specifically comprises at least R, G, B three-color LED light source, includes each one of red LED light source 1, green LED light source 3 and blue led light source 4 in the construction shown in fig. 1; Also comprise at least three group first collimation lens set 2, dichronic mirror 5 and the plus lens group 6 of placing in turn, diaphragm 7, optical integral rod 8 and attenuating device 16, each corresponding one group of first collimation lens set 2 of red LED light source 1, green LED light source 3 and blue led light source 4, the light that each light source sends carries out mixed light through dichronic mirror 5 after the first respective collimation lens set 2; Mixed light enters in attenuating device 16 through plus lens group 6, diaphragm 7, optical integral rod 8 successively, and attenuating device 16 makes light obtain from four circumferential centers in light beam dimmed gradually from four Zhou Dao center gradual change decay.
Wherein, the light for the illuminator projected usually closes light by RGB three-color light source and obtains, and therefore, the illuminator shown in the present embodiment Fig. 1 includes red LED light source 1, green LED light source 3 and blue led light source 4.Can also need to increase other light sources according to the color of optical projection system in a particular application.
Wherein, the first collimation lens set 2 generally includes multiple lens, and the light beam that each color light source sends is expanded and collimates after each self-corresponding first collimation lens set 2, reaches the object reducing the angle of divergence, promote the depth of parallelism.As shown in Figure 1, in this specific embodiment, collimation lens set 3 is made up of three lens.
During specific works, red LED light source 1, green LED light source 3 and blue led light source 4 send red light, green light and blue light respectively, red light, green light and blue light carry out expanding and collimating respectively through the first collimation lens set 2 of correspondence, the unification on dichronic mirror 5 travel direction of red light after collimation, green light and blue light, for mixed light is ready, RGB three-color light source is focused on diaphragm 7 place respectively by mixed light beam under the effect of plus lens group 6, the focus point at diaphragm 7 place is by ray cast being entered in optical integral rod 8, optical integral rod 8 is utilized to carry out mixed light and integration Homogenization Treatments, light after homogenising enters attenuating device 16 from the light of optical integral rod 8 exit portal outgoing and carries out attenuation processing, obtain from four circumferential centers decay hot spot dimmed gradually, decay hot spot forms on illuminated area 10, by this decay hot spot by projection lens projects on screen, can directed make up in prior art due to luminous energy differential loss that crevice projection angle brings, the brightness uniformity of outgoing screen is promoted, solve unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
In specific implementation process, coordinate the needs of projector architecture design, illuminated area 10 is the position at DMD12 place in projector not necessarily, so the hot spot of illuminated area 10 can carry out imaging projection by relay lens group 11, target hot spot is made to fall on the DMD12 of projector, specifically as shown in Figure 1.Illuminated area 10 is preferably cola illuminated area.
As shown in Figure 2, for the Illumination Distribution schematic diagram on illuminated area in Fig. 1 10 and DMD12, as can be seen from the Illumination Distribution figure shown in Fig. 2, whole decay hot spot is trend dimmed gradually from four circumferential centers, during by this dot projection to screen, the fringe region that crevice projection angle is larger compares the less central area of angle can produce relatively large luminous energy loss, the loss that the hot spot of this specific embodiment and crevice projection angle bring makes up mutually, the loss that screen edge region and central area are brought due to hot spot brightness gradual change and crevice projection angle is just mated, the brightness of outgoing screen entirety and homogeneity are got a promotion, solve the problem at the dark angle of dark side.Wherein, decay hot spot shown in Fig. 2 is square hot spot 17, the Aspect Ratio of attenuate light shape of spot can design as required in a particular application, be the hot spot of 4:3 or 16:9 as conventional, the Aspect Ratio of light spot shape is determined jointly by optical integral rod 8, attenuating device 16 and DMD12 dimension scale usually.
Attenuating device 16 in this specific embodiment has the effect decayed to light, and it is gradual change to the decay of light beam, namely dimmed gradually from four circumferential centers by the light beam after attenuating device 16.The mode that attenuating device 16 can add polaroid by polarization conversion system in a particular application realizes, also can directly be realized by attenuator, other devices of the function that can realize attenuating device 16 can also be adopted to realize, enumerate in the present invention and add by polarization conversion system the formation that embodiment that the mode of polaroid and attenuator mode realize illustrates attenuating device 15, specifically see embodiment 2 and embodiment 3.
Embodiment 2
On the basis of embodiment 1, the present embodiment adopts the mode of attenuator to realize the attenuating device 16 of embodiment 1, specifically as shown in Figure 3.
As shown in Figure 3, a kind of illuminator of this specific embodiment comprises at least R, G, B three-color LED light source, includes each one of red LED light source 1, green LED light source 3 and blue led light source 4 in the structure shown in Fig. 3; Also comprise at least three group first collimation lens set 2, dichronic mirror 5 and the plus lens group 6 of placing in turn, diaphragm 7, optical integral rod 8 and the attenuator 9 as attenuating device, each corresponding one group of first collimation lens set 2 of red LED light source 1, green LED light source 3 and blue led light source 4, the light that each light source sends carries out mixed light through dichronic mirror 5 after the first respective collimation lens set 2; Mixed light enters in attenuator 9 through plus lens group 6, diaphragm 7, optical integral rod 8 successively, attenuator 9 has the several attenuation rate reduced gradually from inside to outside, attenuator 9 makes light obtain from four circumferential centers in light beam dimmed gradually from four Zhou Dao center gradual change decay, and light beam outgoing from attenuator 9 produces from four circumferential centers in hot spot dimmed gradually at illuminated area 10.
In this specific embodiment, before attenuator 9 is placed in illuminated area 10, both can carries out the light intensity attenuation of hot spot diverse location according to design requirement, can keep again the homogeneity of hot spot to greatest extent, preferred embodiment, illuminated area 10 adopts cola illuminated area.
In specific implementation process, coordinate the needs of projector architecture design, illuminated area 10 is the position at DMD12 place in projector not necessarily, so the hot spot of illuminated area 10 can carry out imaging projection by relay lens group 11, target hot spot is made to fall on the DMD12 of projector, specifically as shown in Figure 3.
In this specific embodiment, the first collimation lens set 2 generally includes multiple lens, and the light beam that light source sends is expanded and collimates after the first collimation lens set 2, reaches the object reducing the angle of divergence, promote the depth of parallelism.As shown in Figure 3, in this specific embodiment, the first collimation lens set 3 is made up of three lens.
In specific implementation process, be overall in converging form from the light of optical integral rod 8 outgoing, and the light decay of attenuator 9 has Spreading requirements, thus the size of attenuator 9 be with its residing for position there is certain relation.In a preferred embodiment, the length of attenuator 9, width and attenuator 9 meet following relation to the distance of optical integral rod 8 exit portal:
Wherein, a is length or the width of attenuator 9, and A is length or the width in optical integral rod 8 beam projecting face, and h is attenuator 9 and optical integral rod 8 exit portal distance,
for the angle of optical integral rod 8 edge emergent ray and optical axis.Described optical axis refers to the optical axis of optical system, and particularly, angle refers to together the angle of the axis of optical integral rod 8 edge emergent light and optical integral rod central main beam.During concrete calculating, when being the length of attenuator 9 when asking a, then A is the length in optical integral rod 8 beam projecting face, and when being the width of attenuator 9 when asking a, then A is the width in optical integral rod 8 beam projecting face.
In specific implementation process, attenuator 9 is in order to reach the attenuating of gradual change, and it has the attenuation rate that n kind reduces gradually from inside to outside, and wherein n is positive integer.On attenuator 9, light decay kind is more in theory, the final homogeneity shown on screen is better, but consider cost, processing technology and human eye identifiable design ability, preferably attenuator 9 at least comprises 5 kinds of light decay distributions reduced gradually from inside to outside, and each attenuation rate can be arranged according to practical application.Be illustrated in figure 3 attenuator 9 structural representation in an example, attenuator 9 shown in Fig. 4 has the attenuation rate of 5 kinds of gradual changes from inside to outside, be distributed in 4 concentric circless and 1 circumscribed rectangle, attenuator 9 outer to interior optical energy attenuation rate be 0,2%, 5%, 8%, 10% successively.
As shown in Figure 2, for the Illumination Distribution schematic diagram on illuminated area in Fig. 3 10 and DMD12, as can be seen from the Illumination Distribution figure shown in Fig. 2, whole hot spot is trend dimmed gradually from four circumferential centers, during by this dot projection to screen, the fringe region that crevice projection angle is larger compares the less central area of angle can produce relatively large luminous energy loss, the loss that the hot spot of this specific embodiment and crevice projection angle bring makes up mutually, the loss that screen edge region and central area are brought due to hot spot brightness gradual change and crevice projection angle is just mated, the brightness of outgoing screen entirety and homogeneity are got a promotion, solve the problem at the dark angle of dark side.
Embodiment 3
On the basis of embodiment 1, the present embodiment adopts the mode of polarization conversion system and polaroid to realize the attenuating device 15 of embodiment 1, specifically as shown in Figure 5.
As shown in Figure 3, a kind of illuminator of this specific embodiment comprises at least R, G, B three-color LED light source, includes each one of red LED light source 1, green LED light source 3 and blue led light source 4 in the structure shown in Fig. 3; Also comprise at least three group first collimation lens set 2, dichronic mirror 5 and the plus lens group 6 of placing in turn, diaphragm 7, optical integral rod 8 and form the second collimation lens set 13 of attenuating device, polarization conversion system 14 and polaroid 15, polaroid 15 has the polarization direction of several gradual change from inside to outside, and outermost polarization direction is identical with the light vector direction of vibration entered in polaroid 15 and the polarization direction of polaroid 15 and the polarization direction of light from outside to inside angle is larger; Each corresponding one group of first collimation lens set 2 of red LED light source 1, green LED light source 3 and blue led light source 4, the light that each light source sends carries out mixed light through dichronic mirror 5 after the first respective collimation lens set 2; Mixed light, through diaphragm 7, optical integral rod 8, enters polaroid 15 from the light of optical integral rod 8 outgoing after the second collimation lens set 13, polarization conversion system 14, obtains four circumferential centers in light beam dimmed gradually through polaroid 15 attenuation processing.
During specific works, red LED light source 1, green LED light source 3 and blue led light source 4 carry out beam-expanding collimation through respective the first collimation lens set 2 pairs of original beam, three coloured light have carried out the unification on direction through dichronic mirror 5, for mixed light is ready, RGB three-color light source is focused on diaphragm 7 place respectively by mixed light beam under the effect of plus lens group 6.Ray cast is entered optical integral rod 8 again by the focus point at diaphragm 7 place, carry out mixed light and integration Homogenization Treatments, from the light of optical integral rod 8 exit portal outgoing, collimation process is carried out through the second collimation lens set 13 in the position of illuminated area, collimated light beam is by changing polarized light outgoing into after polarization conversion system 14, and polarization conversion system 14 can reach the effect that mixed light beam converts polarized light to minimum optical energy loss.Light beam forms through polaroid 15 hot spot that meets design requirement on the DMD12 of projector.
In specific implementation process, coordinate the needs of projector architecture design, the light beam of polaroid 15 outgoing needs due to distance, can add relay lens group after polaroid 15, carry out imaging projection by relay lens group 11, target hot spot is fallen on the DMD12 of projector.
In this specific embodiment, the first collimation lens set 2 generally includes multiple lens, and the light beam that light source sends is expanded and collimates after the first collimation lens set 2, reaches the object reducing the angle of divergence, promote the depth of parallelism.As shown in Figure 5, in this specific embodiment, the first collimation lens set 3 is made up of three lens.
In this specific embodiment, polaroid 15 has the polarization direction of multiple gradual change, polarization direction is more in theory, the polarisation distribution of polaroid 15 is abundanter, final show uniformity is better, but consider cost, processing technology and human eye identifiable design ability, polaroid 15 at least needs the polarisation distribution of more than 5 kinds.As the schematic diagram that Fig. 6 is polaroid 15 in the present embodiment, the polaroid 15 shown in Fig. 6 has the polarization direction of 5 kinds of gradual changes from inside to outside, is distributed in 4 concentric circless and 1 circumscribed rectangle.Wherein, the outermost polarization direction of polaroid 15 is identical with the polarization direction of light, more toward nexine, the angle of the polarization direction of polaroid 15 and the polarization direction of light is larger, and the angle of the polarization direction of the polaroid shown in Fig. 6 and the polarization direction of light is 0 °, 5 °, 10 °, 15 °, 20 ° from outside to inside successively.
The angle of the polarization direction of polaroid 15 and the polarization direction of light can be calculated by Malus law, specific as follows:
Wherein,
for incident intensity,
for transmitted light intensity,
for the angle between the polarization direction of polaroid and the light vector direction of vibration of incident light.
As shown in Figure 2, for the Illumination Distribution schematic diagram on illuminated area in Fig. 5 10 and DMD12, as can be seen from the Illumination Distribution figure shown in Fig. 2, whole hot spot is trend dimmed gradually from four circumferential centers, during by this dot projection to screen, the fringe region that crevice projection angle is larger compares the less central area of angle can produce relatively large luminous energy loss, the loss that the hot spot of this specific embodiment and crevice projection angle bring makes up mutually, the loss that screen edge region and central area are brought due to hot spot brightness gradual change and crevice projection angle is just mated, the brightness of outgoing screen entirety and homogeneity are got a promotion, solve the problem at the dark angle of dark side.
Embodiment 4
On the basis of embodiment 1 or 2 or 3, present invention also offers a kind of projector, described speculate and comprise power-supply system, the driving control system be connected with power-supply system and optical projection system, also comprise embodiment 1 or the illuminator described in 2 or 3, illuminator is connected with power-supply system, driving control system, and in illuminator, the light beam of outgoing enters in optical projection system.
The illuminator of embodiment 1 or 2 or 3 can obtain from four circumferential centers hot spot dimmed gradually, this hot spot is applied in projector, then by projector in projection screen, the luminous energy differential loss that crevice projection angle brings can be made up, the brightness uniformity of outgoing screen is promoted, solves unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
Embodiment 5
On the basis of embodiment 4, present invention also offers a kind of back-projection system, it comprises rear projection screen, also comprises the projector described in embodiment 4, and the ray cast of outgoing in projector is on rear projection screen.The hot spot cast out in above-mentioned projector is dimmed gradually from four circumferential centers, by this dot projection in projection screen, the luminous energy differential loss that crevice projection angle brings can be made up, the brightness uniformity of outgoing screen is promoted, solves unit display in existing projection tiled display and there is the problem at the dark angle of dark side.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments, equivalent replacement and improvement etc. done within the present invention's spirit and principle, within the protection domain that all should be included in the claims in the present invention.
Claims (9)
1. an illuminator, comprise at least R, G, B three-color LED light source, it is characterized in that, the plus lens group, diaphragm, optical integral rod and the attenuating device that also comprise at least three group first collimation lens set, dichronic mirror and place in turn, each corresponding one group of first collimation lens set of R, G, B LED light source, the light that each light source sends carries out mixed light through dichronic mirror after the first respective collimation lens set; Mixed light enters in attenuating device through plus lens group, diaphragm, optical integral rod successively, and attenuating device makes light obtain from four circumferential centers in light beam dimmed gradually from four Zhou Dao center gradual change decay.
2. illuminator according to claim 1, is characterized in that, described attenuating device comprises attenuator, and the light of optical integral rod outgoing arrives illuminated area after attenuator, and attenuator has the several attenuation rate reduced gradually from inside to outside.
3. illuminator according to claim 2, is characterized in that, attenuator has at least 5 kinds of attenuation rate reduced gradually from inside to outside.
4. illuminator according to claim 2, is characterized in that, the length of attenuator, width and attenuator meet following relation to the distance of integrating rod exit portal:
Wherein, a is length or the width of attenuator, and A is length or the width in optical integral rod beam projecting face, and h is attenuator and optical integral rod exit portal distance,
for the angle of optical integration bar edge emergent ray and optical axis.
5. illuminator according to claim 1, it is characterized in that, described attenuating device comprises the second collimation lens set, polarization conversion system and polaroid, polaroid has the polarization direction of several gradual change from inside to outside, outermost polarization direction is identical with the light vector direction of vibration entered in polaroid and the polarization direction of polaroid and the polarization direction of light from outside to inside angle is larger, the light of optical integral rod outgoing is through the second collimation lens set, polaroid is entered after polarization conversion system, after polaroid attenuation processing, outgoing obtains from four circumferential centers in light beam dimmed gradually.
6. illuminator according to claim 5, is characterized in that, polaroid has the polarization direction of at least 5 kinds of gradual changes from inside to outside.
7. illuminator according to claim 1, is characterized in that, is also provided with relay lens group after attenuating device, and the light beam after attenuating device carries out imaging projection by relay lens group again.
8. a projector, comprise power-supply system, the driving control system be connected with power-supply system and optical projection system, it is characterized in that, comprise the illuminator described in any one of claim 1-7, illuminator is connected with power-supply system, driving control system, and in illuminator, the light beam of outgoing enters in optical projection system.
9. a back-projection system, comprises rear projection screen, it is characterized in that, also comprises projector according to claim 8, and the ray cast of outgoing in projector is on rear projection screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410780440.3A CN104516181B (en) | 2014-12-17 | 2014-12-17 | A kind of illuminator, scialyscope and back-projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410780440.3A CN104516181B (en) | 2014-12-17 | 2014-12-17 | A kind of illuminator, scialyscope and back-projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104516181A true CN104516181A (en) | 2015-04-15 |
| CN104516181B CN104516181B (en) | 2016-06-29 |
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| CN107272212A (en) * | 2016-03-30 | 2017-10-20 | 三星电子株式会社 | Structured light generator, object identification device, electronic installation, structured-light system |
| CN107454718A (en) * | 2017-08-31 | 2017-12-08 | 赣州光联电子科技有限公司 | A kind of LED light source and optical system with amendment colour temperature function |
| WO2018113314A1 (en) * | 2016-12-23 | 2018-06-28 | 威创集团股份有限公司 | Dlp rear projection and spliced projection system |
| CN109884842A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN109884843A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN116413730A (en) * | 2021-12-29 | 2023-07-11 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging device, storage medium and laser radar |
| CN116413730B (en) * | 2021-12-29 | 2024-05-31 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging device, storage medium and laser radar |
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| CN116413730B (en) * | 2021-12-29 | 2024-05-31 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging device, storage medium and laser radar |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: VTRON GROUP Co.,Ltd. Address before: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee before: VTRON TECHNOLOGIES Ltd. |
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Granted publication date: 20160629 Termination date: 20211217 |