WO1992016871A1 - Projection type display device - Google Patents

Projection type display device Download PDF

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Publication number
WO1992016871A1
WO1992016871A1 PCT/JP1992/000307 JP9200307W WO9216871A1 WO 1992016871 A1 WO1992016871 A1 WO 1992016871A1 JP 9200307 W JP9200307 W JP 9200307W WO 9216871 A1 WO9216871 A1 WO 9216871A1
Authority
WO
WIPO (PCT)
Prior art keywords
projection
light
ru
scan click
ri
Prior art date
Application number
PCT/JP1992/000307
Other languages
French (fr)
Japanese (ja)
Inventor
Noboru Ninomiya
Junichiro Shinozaki
Masaki Ishikawa
Akihito Tanimoto
Original Assignee
Seiko Epson Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/949,243 external-priority patent/US5422691A/en
Priority to JP3/51251 priority Critical
Priority to JP5125191 priority
Priority to JP3/169646 priority
Priority to JP16964691 priority
Priority to JP18464991 priority
Priority to JP3/184649 priority
Priority to JP3/233395 priority
Priority to JP23339591 priority
Priority to JP23633691 priority
Priority to JP3/236336 priority
Priority to JP3/281500 priority
Priority to JP28150091 priority
Priority to JP4/35231 priority
Priority to JP3523192 priority
Application filed by Seiko Epson Corporation filed Critical Seiko Epson Corporation
Publication of WO1992016871A1 publication Critical patent/WO1992016871A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/74Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7441Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/005Projectors using an electronic spatial light modulator but not peculiar thereto
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/005Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/006Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/132Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Abstract

An oblique projection type display device. The display device includes a light source, light modulation means, projection means for projecting an image formed by light modulation means to a screen and the screen to make it possible to irradiate substantially parallel rays of light with respect to a light bulb and to prevent occurrence of non-uniformity of brightness of an image, wherein the axis of projected light projected by the projection means makes an oblique angle with the screen. The projection means comprises first projection optical means for converting the image formed by the light modulation means to an intermediate image having trapezoidal distortion, and second projection optical means for converting the intermediate image having the trapezoidal distortion to an image devoid of the trapezoidal distortion on the screen. The first projection optical means has two lenses which are not parallel to each other, and the structures of the light source, optical path conversion reflecting mirror and screen are improved.

Description

Akira fine-throw Cum type Display equipment technology content field

The present invention, video images and co-down pin-menu Ri engaged to another image, such as a projection-type display device that displays the, the back of the scan click rie down and have use also liquid crystal La wells valves, etc. in the name or Ri about the projection Display device you projected obliquely 'order.

Background technology

In recent years, the transmission type or is displayed on the reflection type Dots Conclusions-click scan liquid crystal or the like (that hereinafter referred to as La Lee Bok valves) display device had use gastric use of this La wells valves by Ru enlarged and projected system to enlarge and project the image to the scan click rie down Ru show to the big screen that have been paying attention. This is blanking La cormorant in by that image displayed on the down tube (CRT) is a limit to the of come large and not a self, is to you large screen have accompanied an increase in the size of the probe La window down tube itself, practically Ru Ah in order atmosphere of about 4 0 inches is Ru response to requests and have obtained an image over which their eyes that Do the limit.

- How, La wells valves for itself in that turn into large-area S is easy rather than the obtained Ru this a large-sized liquid crystal display device has the name of the defects on the production, and obtained, et al were in temporary I Ki even Umate expensive to ing.

Yo will Kanako and power of this, et al., If the transmission type (or reflective) La wells alve enlarge and project the image that will be displayed in that come have use of a large can of the screen without restrictions, Ru can der and give Ru child Oh Ru large screen and powerful.

Was it in Tsu, pay an optical system that be enlarged and projected to have use of the La wells valves in key catcher Binet Tsu within me, and rear projection to the scan click rie down which is provided on the front of the key catcher Binet Tsu Bok Te, Ru Tei Tsu optimal in key catcher Binet Tsu door de office-flops Tray type of display device to the jar by that Ki out and child Looking at the front or we enlarged image is provided.

This species of La wells valves 'conventional rear projection display device that had use of the Ni Let' s that also saw et al is the real No. 1 one 8 5 7 7 8 No. For example, transmissive liquid crystal la Lee door valves to the light source power, et al illumination given to give a, this liquid crystal La wells valves by Ri optical path to the reflecting Mi La over to be and that to expand Ri by the projection-les-down's the image that will be displayed in the to convert the, Ru structure der rather guiding the back of the scan click rie down. All of you that I Ri projection optical system and the child will breath ya Binet Tsu pay et al Re can der moves to the responsibility neglected places in the door is, and Brightness roast scan click rie also one der indoor that Ki out and child Looking at the image on the emissions.

Teeth or was, in the above-described conventional de-office flop Tray type by that display device to the rear projection of vinegar click rie and by Ri optical path converts the light beam transmitted through the La wells valves in reflection Mi La one because the Ru structure der rather guiding the back of the emissions, the scan click rie in to pair with and projected Tsu also perpendicular the optical axis such have a trapezoidal distortion, etc. in good Ri reflected Mi in the distortion occurs in the image La - of receiving has a significant constraint on the installation conditions, volume projection optical system Ru Me occupied due to this, especially the scan click rie in to the pair to depth came the way direction of the dimension (key catcher Binet Tsu Bok of thickness) is increased, and therefore thin key catcher bi Netw by that rear-projection-type display device as a child and is de Ki such have you in the door.

Its oblique projection method contemplated et al is Ru with a means that solve the Re this in this. Generally that by the inclined ones les emission's statue USP 7 5 1, T. That occur trapezoidal distortion cormorants I was S cheimp Π ug force "shows a 3 4 No. 7. The first 3 object plane 4 3 inclined Remind as in figure you imaged on the image plane 4 5 inclined Ri by the Re emission's 4 4. Tilt-out of the relationship of the Soviet Union that Do Ni Let 's an extension of the object surface 4 3 and Les emissions's 4 4 and the image plane 4 5 Remind as in the figure that matches. If the intersection of the perpendicular and the image plane 4 5 against the light pongee Z on the image side focal point f of les emission's 4 4 shall be the g, first 4 figure shown by Ru image on the object plane of the square ABCD the imaged on the image plane 4 5 Tsu Do trapezoidal ABCD that will be shown in the first 5 FIG Ri by the Re emission's 4 4.

It to the order to you remove the trapezoidal distortion of this at this, Remind as in the first 6 Figure La wells valves 4 to 6 and the first projection Les emissions's 4 7 and the second projection-les-down's 4 9 and the scan click rie down 5 0 against the Z-axis angles 0 i, Φ 2, ø. , You to Let 's place 0 4's only tilting the by. In here, the intersection line g between the first projection les emission's 4 7 first projection les emission's 4 7 with Oh Ru image surface 4 8 parallel planes and the trapezoidal distortion Ri through the image-side focal point f 1 of When a line of intersection g 'of the second projection les emission's 4 9 of the object-side focal point f 2 a through Ri second projection les emissions 4 9 and a plane parallel to the Ah Ru image plane 4 8 trapezoidal distortion in the jar by Ru to match the.

Doo-out of this, even if La wells carbonochloridate Norre image of the probe 4 6 of the first 7 square ABCD that will be shown in the figure, shown in the first 8 Figure Ri by the first projection Les emissions's 4 7 Although ing to Oh Ru image ABCD of Do keystone distortion Let 's that are, have the name of the trapezoid distortion shown in 1 Figure 9 on the projection les emissions 4 9 by Ri scan click rie down 5 〇 to ​​the 笫 2 in its this Ru is imaged on the image ABCD, Remind as in the first 2 FIG projection optical system of this, folding Ri by the and Mi La one 4 1 Mi La over 4 Y and the second 笫 1 if Osamere in the Let 's you tune in key catcher Binet Tsu door 3 8, that Ki out and the child that make up the rear projection display device thin. FIG 3 9 shows a projection optical science Interview two Tsu bets.

Teeth or to long et al, in the above projection optical system, Ri Do focal length of the first projection les emission's 4 7 that only you in the first 6 figure order to you remove trapezoidal distortion rather short, Le emissions mouth diameter of the figure is small Ku that Do not. Light source 5 1 force to jar good of the second 0 diagram eyes of its, et al. Co-down Devon Sir Les emissions child's 5 2 that be illuminated La Lee Bok valve 4 to 6 in the light collected and power " required that Do not. Its of a tree, the second 0 angle 0 that Tsu different in the upper and lower of La to cormorants I was shown in Figure Lee Bok valves 4 6 i, Θ 0 Ri Do not to and this you incident light in, La wells valve 4 6 light transmittance is this and force you change Ri by the angle of incidence of, et al scan click rie down 5 image problem you have with the Brightness is the Nim et al. that may arise from the point on the 0 there Ru.

On the other hand, the conventional lighting device that is used to seed the projection type display device of this, the Ni would Yo sectional 而図 shown in the third 0 Figure, a run-flop 3 and Li off Selector Selector 5 4 in the configuration, run-flop 5 3 forces, et at to that light beam force "re off Selector Selector 5 4 emitted anti - morphism and Ri Do the light beam H to, this is a light source and to scan click Li image was Tei is projected to over emissions. . Tooth force, and, in the aforementioned prior art, the optical 朿 H of the light beam you exit run-flop 5 three colleagues Ru is I De reflected by Re off Selector Selector evening 5 4 Re off Selector Selector motor 4 of the center F of the reflection light force Ku, distribution of high have light flux because parallelism was of that, the third 1 centered portion Remind as in figure less Do rather, scan click rie down center of the enlarged image image projected had dark have a When did question ¾ a ^ to.

Light K emitted Tsu toward whether to end or Amane Luo of Li-off Selector Address 5 4 was or will have or Te or or escape-up of the Soviet Union, such Ki out and this you use effective force, One was

On the other hand, the conventional rear projection display device that had use the seeds of La Lee Bok alve this, JP-A-3 In example Example - Let 's also look et is 0 5 1 2 5 1 No. Ni, the light source pressurized et illumination given et al is in the to convert the La wells valves the images that appear in the in by Ri enlarged and projected on a projection les emission's reflection by Ri optical path Mi La chromatography, scan click rie diagonal Me direction force of the back of the emissions, but Ru configured Ni Let 's Ku et conductive, reflective Mi La over of that is Re et al have use four second reflective planes Remind as in FIG Mi La -5 5 ing .

Teeth or to, reflection of plane Mi La -5 5 Cum investment in order to, but you want to use was a record down's and reflection Mi fourth 3 scan click rie in to Remind as in figure Tsu by the La over 5 〇 Ri the image 5 6 distorted songs on raw Ji, expansion rate Ru Oh is obtained, et al Re such have parking if needed.

Or is a transmission-type scan click rie emissions of conventional of this species, the

5 0 figure Ri for even the shows are Ru structure Ah, FIG (a) is shown in a perspective view a transmission scan click rie down of its, the (b) shows this scan click rie the emissions of the cross-section it is shown. Video profile di We Selector Selector 5 seven et projected light image is Tsu by the transmission scan click rie down 5 8 micro-flop formed on a rear surface of the rhythm A L'over 5 S a It is focused on the front side. Flop rhythm apex angle of each flops rhythm that make up the micro-flop rhythm A L'over 5 8 a This is that is formed on 5 2 ° to cormorants good illustrated. Optical image is focused on the front side reaches the human eye 5 9, the light image projected or video profile di E Selector Selector 5 7 et is recognized.

Tooth or to a force, et al., Light leakage and go be sampled is Ji raw is have you on the transmission type scan click rie down 5 8 Do not structure 'concrete will Yo of the above. One or is, Ri by the angle of the light that be incident on the flop rhythm A L'over 5 8 a, partially transparently types of Prin is refracted by the arm's reach to the human eye 5 9 light was Tei phenomenon leaking in the scan click rie down 5 8 that Ji raw. Me other its transmission type scan click image to be output to copy the rie down 5 8 Ri Do darkens, visible and not al force, one was.

Also, main mosquito parkinsonism Go scan I that Ji raw is considered to jar good the next. Chi I sand, Ni Let 's that are shown to the fifth FIG. 1, can you against the shielding sheet over door 6 0 on the light incident surface side of the transmission type scan click rie down 5 8, this shielding sheet over TMG 6 0 against al light incident surface side that is above flop rhythm § les over 5 8 a is formed. Directed force indicated by the arrow, the light et incident totally reflected by the exit surface 5 8 b of the scan click rie down 5 8, is et to the shielding sheet over preparative 6 0 refracted at the back side of the flop rhythm A L'chromatography bending et al Te been Ru. Bending et al light This is it reach the human eye 5 9 and through the exit surface 5 8 b. By force; one, the black shielded over door 6 0 originally dark Ku Oh Ru base Ki part in the light-incident surface is covered with is, to the human eye 5 9 Ru name to the child Ru looks rather Ru Ming concrete specifically, the original, appeared black in such MUST bE part is Tsu light rather than Ru bright red urn rather enjoys an eye stand also bet ing. This is, because had clause Ri songs etc. ho red Ri by the wavelength dependence of refraction, Ru seems that red is also to have easy leakage.

As a countermeasure that to prevent Yo I Do not Go over be sampled phenomenon of this, to form a blanking rack scan Bok La Yi-flop 6 1 that will be drawing shown by hatching in the transmission type scan click Li one down 5 8 , the optical path Ru name to the cause of light leakage and a busy fixture this thinking it is Ru. Essence and force, the teeth of Chikaraku et al., Although the Ru Oh be possible with this you suppress the generation of my Tentatively Gore over nest Tsu by the Do measures would Yo this, that Ji seal the Wuyi be sampled specific measures in rather than, or, hand between the pressurized force to you form a blanking rack be sampled La Yi-flop 6 1 to the scan click Li one down 5 8, Ru and not cormorants question 题点 nitrous that.

The present invention, a projection type ^ 示装 location to Ri by the and this incident elevation angle La wells valves to have the tail that be illuminated in almost constant parallel light by the various parts, small, non-Luo of Brightness a call that provides a display device of Ihasu Me projection shall be the purpose.

Run-up force of or light source, et al out elevation is due to re-full-les-click evening in. Ri to reflection and Bohol the distribution of the resulting been Ru parallel light beam uniformity, of Brightness is almost uniform a projection display instrumentation that have a lighting device Ki that out and give Ru this the images - anonymous shall be the purpose of the this that provides.

Of et al. In the optical system small Do rather than the even of images on one or more reflective Mi La over the partially also rather'm Ri scan click rie on to and this shall be the non-planar in uniform correction of distortion, it a call that provides Viewing equipment shall be the possible modification of the expansion rate and purpose.

Their to eyes and this that provides Viewing device Ru with generation of light leakage and go be sampled is rather free, the transmission scan click rie down allow and this you observe a high quality image It shall be the basis.

Disclosure of the Invention

Sand I Chi present invention includes a light source, a light modulating means, the image of the light modulator hand stage have a scan click projection means you project to rie down and scan click rie down, the scan click rie down at the projection display device optical axis you obliquely incident projection means in pairs, the projection means is a projection optical means 笫 1 you forming an Ah Ru image trapezoidal distortion of the optical modulation means , said Oh Ru image of trapezoidal distortion in the scan click rie emissions configured Ri by the second projection optical means you keystone distorted Ku projection, the first projecting Shako science means have a parallel to each other least for the also shall be the features a call that having a two-les-down's.

Also diaphragm Ri mechanism and the features that you provided in said projection optical system "5 o

The run-up or we emergent evenings Re off Selector Selector for you reflects the light beam outgoing side of the space, was one-sided or the ra Menma other central limited et portion of both sides of the convex light a secondary you place a transmissive optical element, the end force or the re off Selector Selector, because the you interest light you emitted Tsu suited around et al., near this optical 尜子and this arranging an optical element in which Ku the thickness of limited et al that the end with a thin, for the al you characterized that you Ru an illumination device disposed a conical optical element. Also, the light source and the light modulating means, and projection means you project the image light Ru generated by the modulation means into scan click rie down, scan click rie the projection light Ru is y de Ri by projecting means a reflection Mi La over the Ru to be incident on emissions, possess a scan click rie down, diagonal Me central optical axis of the projection beam irradiated the Ru is projected by the projection means in pairs before Symbol scan click rie down and have vinegar that the projection display instrumentation ^ incident on the reflective Mi La chromatography composed of a plurality, and characterized that you have a small name rather non-planar one or more reflective Mi La chromatography also you. Having a condensed is that over-type scan click rie down by Ri on the front side to the back side or the al angle of the name to enter Cum is Ru light image is fine-flops Rhythm A L'over to the of et al. also the in and have you that, and this each Prin's 厶 apex angle of the micro-flops Rhythm a L'over is set to less than 4 0 degrees or more 5 ◦ degree, or the center of the projection light angle of incidence Chikaraku 6 0 against one down Ri optical axis force scan click. You said a call that having a large can not corner the degree Ri good.

Easy iji a description of the drawings

Figure 1 is layout view of by that oblique Me projection optical system in the present invention, Figure 2 an explanation view of your only that La wells alve in Figure 1, Figure 3 is our in Figure 1 illustration of Mazo in that, FIG. 4 is an explanatory view of imaging on the scan click rie down that only you in FIG. 1, Fig. 5 a projection optical system that by the present invention a positive optical system placed view field stand 突施 example in which at Les emission's, 6 diagram is constituted by Les emission's of ί¾ the first projection optical system that by the present invention a positive Les emission's optical system arrangement diagram of an embodiment of a case, FIG. 7 is Ru good in the present invention, the positive Les emission's first projection optical system had two sets of two-les emission's have a parallel to each other physician optical system arrangement diagram of Ru good 突施 example, 笫 8 figures and positive Les emission's first projection optical system with two les emission's I that have one another such parallel to the present invention had for two pairs eclipse Optical system arrangement diagram of by that embodiment in emission's, 筇 9 figures Ru good in the present invention, the positive Les first projection optical system had a two pairs of two-les emission's have a parallel to each other optical system arrangement diagram of a second embodiment that by the emission's and 负 les emission's, first 0 Figure is a cross-sectional view of an embodiment of Les emission's to use in this onset bright, first 1 FIG this onset that by the total reflection flop rhythm to use for bright scan click rie down the cross - section enlarged view, the configuration of the first 2 figures rear projection display device that by the oblique projection optical system that by the present invention examples sectional view of the first 3 Figure tilted object plane explanatory view of the imaging of the first 4 figures illustrating the object plane of the first 3 diagrams, first 5 figures of the image plane of the first 3 Figure illustration of the image of the imaged first 6 Figure is a sectional view of an oblique projection optical system, the first 7 Figure is an explanatory view of a La wells valve of the first 6 view, trapezoidal 笫 1 8 figures 笫 1 6 Figure Ibitsunoa Ru image plane of the illustration, 笫 1 Figure 9 first Scan click illustration of imaging of rie down of Figure 6, the second 0 FIG optical path view of the oblique projection optical system including an illumination system, scan pop second 1 figure that only you to conventional projection optics DOO die a gram-view, 笫 2 2 Figure is a sectional view of a projection optical system having a diaphragm Ri mechanism that by the present invention, the second 3 view (a) ~ (C) shows an example of the shape of the diaphragm Ri mechanism illustration, second 4 Figure scan pop preparative die a g view on scan click rie down of the feeder and using grain Ri mechanism that by the present invention, the second 5 Figure projection of the present invention sectional view of the illumination optical apparatus of the type ¾ shown device, the second 6 Fig parallel light flux distribution diagram of irradiation Meiko Studies device of the present invention, the second 7 figures of that only in another embodiment the projection type display device of the present invention the illumination optical apparatus of the cross-sectional view second 8 view another embodiment in contact only that projection table actual surface actual present present Terukatachi et al of the present invention, Ming your

Sectional view of a bright light science apparatus shown device, the second 9 Figure is a cross-sectional view a third 〇 Figure of the illumination optical system in our only that projection display device to another 施例 et al of the present invention the conventional projection type display sectional view of the illumination optical apparatus of the device, 3 1 Fig illumination optical apparatus parallel light 朿 distribution diagram of a conventional projection type display apparatus, cross-sectional view 3 2 Fig-3 6 Figure showing a modification example of the optical element, 3 7 Fig parallel light flux distribution diagram Ru good to 施例 third 2 Fig-3 6 FIG, 3 8 Figure (a) (B) is reflected Mi La one embodiment ¾ of invention: non ^ sectional figure 3 Figure 9 diagram illustrating the direction of action that by the invention, 4 0 Figure is a schematic view for illustrating a image on by you click rie in to the onset, 4 1 Figure reflection configuration example of a cross-section of the projection type display device had use the Mi La chromatography, fourth 2 囟 sectional view of a reflective Mi La one final that by the prior art, 4 3 Figure that due to the 4 2 Fig scan click Explanatory view of imaging on over emissions, 4 4 Figure (A), (B) is a perspective view Contact good beauty cross-sectional view of a portion showing a structure of a transmission scan click rie down that by the present invention , 4 5 Figure transmissive scan click Li that by the present embodiment - the rear projection is a down Chikarakuteki profile di E click evening perspective, 4 6 Figure that by this embodiment transparent type scan click sectional view of a used analysis sure scan click rie down the effectiveness of rie down, 4 7 Figure 4 0 i a transmission scan click rie down of the fourth 6 Figure grayed La off showing your only that light leakage rate scan click Li one down each position when applied to down switch screen, 4 8 figures a transmission scan click rie down of the fourth 6 Figure 5 0 Lee a down switch screen - one graph showing an application FREE only that light leakage rate scan click rie down each position when the fourth Figure 9 Go one scan Bok in Tsu by the highly directional light source this visual recognition of Ru is prevented Illustration of a fifth 0 Figure A), CB) is a diagram showing a conventional transmission scan click rie down, 5 1 Figure menu mosquito parkinsonism illustration Gore one be sampled is that Ji live, fifth 2 Figure is a sectional view of I that the final reflective Mi La over the prior art, 5 3 Fig state diagram when external light you transmit scan click rie down, 5 4 Fig final reflective Mi La state diagram of when the outside light reflected by chromatography is you transmit scan click Li one down, 5 Fig. 5 illustrates a fifth 6 figures by you click rie in to the prior art reflected Mi of the present invention example der of La over is, Ru sectional view der that by the examples.

¾ good MODE FOR INVENTION you implement

Because that you describe the present invention by Ri in detail, it described with reference to the accompanying drawings.

The: I figure an embodiment of the optical system arrangement of the oblique projection that by the present invention shows, the image of FIG. 2 La wells valve, FIG. 3 is a Oh Ru intermediate image of trapezoidal distortion, its Figure 4 and is Ru respectively show the image on the scan click Li one down has the name of trapezoidal distortion Tei.

筇 to have you in FIG. 1, the optical axis of 笫 1 Les emission's 3 of the projection optical system of 笫 1, the optical axis of the second record emission 4, the optical axis of the second projection optical system 6, La Lee Bok Banore Bed 2 of the normal your good beauty normal of the scan click rie down 7, the same

- Ru Oh on a plane.

Light source 1 have you in FIG. 1, the key cell dated reflector parabolic Roh down run-Puma et Ri Contact been found have a meta Ruha Lee de la down Bukfurdo La Lee Bok Bas le Bed 2 Part of the grid-shaped the electrode was placed also on earthenware pots by ∎ you can control the transmittance of Kakue element of the first on the projection optical system that have been found have use within the liquid product "! Les emissions's 3 and the second-les-down 4-out angle 5 but only tilted to physicians each other, 笫] of the object side ^ plane of the image-side focal plane of the Les down 3 and the second-les-down's 4 line of intersection Transportation in There almost each of the extension surface is collinear to the Z-axis top Ru disposed Ni Let 's Ru passing. and during image plane 5 second projection optical system 6 and the scan click rie down 7 Ni Let 's Ru Wa that have been placed.

Light emitted Ri good light source 1 is you illuminate that come reached in parallel Bohol in La wells alve 2. The force <one by La wells alve 2 pairs to ray Ri penetration by almost the same angle of incidence, La wells in all aspects of the alve 2, uniform Brightness and Control This setup image of La be sampled and the resulting Ru this and force <and can that La wells Banore Breakfast 2, Oh of the first-les-down's 3 and table Ri by the second-les-down's 4 Katachiibitsu who was inclined to each other physician imaging a medium between image plane 5 Mazo in that. Fifth to cormorants it was shown in Fig, a plane parallel to the unrealized Z axis line of intersection of the main plane of the image-side focal plane and the second record emission's 1 0 of the first record emission's 9, middle Mazo the line of intersection of the surface 1 1 shall be the g. This intersection line g and a line of intersection g 'of the second projection optical system 6 of the object-side focal point through Ri second projection optical system 6 middle-plane and a plane parallel to 5 of the above Figure 3 When Ru to match the earthenware pots, Q image ABCD in distorted into a trapezoid Remind as in Figure 3 are shorted with a second projection optical system 6, na have the image ABCD trapezoidal distortion cormorants good of FIG. 4 Ru is 紡像 to the scan click rie down 7 as a.

笫 1 笫 of 笫 1 of the projection optical system you only that in Figure 1 Les emissions FIG. 3, the second-les-down Fig. 4, the first:! 0 views good cormorants to constitute Ri by the inclined by a set table to record emissions's angle ø of, that Ki out of the ToTadashi of aberration and the line cormorant this <scan click rie down 7, rear-projection Tele ∎ you can in the fine di tio to use the re-a scan click rie down, etc. that have been used to down this and force ". This is by combining the sheet over Bok Les emission Chi queue La Moltrasio emission's your good beauty full les ne les-down's the diffusing agent input Ri resin substrate, even Ru Tei to improve the light distribution characteristics Nodea Ru. And power, and, when the earthenware pots good of the present invention that be projected obliquely, Ni Let 's infusible such transmitted to the extending direction of the light Tabagaso projected to the scan click rie down 7, the first 1 Figure Ni Let 's simply showing enlarged table part and have use total reflection flop rhythm, the sheet over bets Ru directs the light beam that will be incident on the front surface substantially perpendicular to the scan click rie down 7, Les emissions in combination with sheet over preparative Ji key Yu La one les emission's, you have to demand and this Ru physicians use a scan click rie down was good and paired light distribution characteristic in the oblique projection is. And about the specific structure of this it is found that you post feedback.

The first 2 figures also to indicate an example of the configuration of a rear projection display device, the light beam of the projection optical Interview two Tsu DOO 3 nine et al configurations described above, the Mi La one 4 0 笫 1 second is reflected Ri yo to see La one 4 1 Ri by the and the child that Ru is obliquely incident on the scan click rie down 7, and the this you thin Ku thickness D of key ya Binet Tsu door 3 8 it can .

b view Les Remind as in Figure 6 Ri by the and this you will be of a, this shows a ¾ 施例 that the second record emission's first projection optical system in a negative les emission's down's interval f 1 cos ø丄-. ί 2 / cos φ 9 and have in the short rather, S ystem the co-down Bruno,. That Ki out and the child you to click door. The first of the real 施例 the same way of the projection optical system shown in FIG. 5, the first image side Le emission's 1 3 of the first projection optical system ^ plane and the second record emission's 1 4 When the line of intersection of Shutaira surface you the intersection of the flat line surface and the middle [j image plane 1 5 including the Z-axis and g, have the name of the embodiments and the base Katachiibitsu in earthenware pots by the same and an image Ru is imaged on the scan click Li one down 7.

7 figures a first projection optical system, than also constituted by two pairs of two-les emission's have a parallel to each other physician-out slope of each record emission's Ri by the and this you will this see to it that low Do rather easily favorable imaging is Ru are obtained, et al. First Les emission's 1 7 of the projection optical system of the snare Chi second] to the second record emission's 1 8-out ANGLE (5 i s only tilt in physician each other, the image side of the first record emission's 1 7 focus. surface and a second record emission's 1 8 of the object-side focal Ah Yo I Ni distribution ^ and Ru on the line of intersection is almost Z I derived a plane, 筇 3 Les emission's 2 0 of the first projection optical system When the fourth Les emission's 2 1 URN ho is the intersection line of the third les emission's 2 0 image side focal plane and the fourth Les emission's 2 first object side focal plane of the-out angles 5 2 inclined to the physician each other Ζ place Ni Let 's Ru Oh on axis. of al. second屮^ image plane 2 2 and the second projection optical system 6 and the scan click rie down 7 each extension surface collinear in which to place Ni Let 's Ru exchange ring, two of the image of the ¾ board of La Lee Bok alve 1 to 6, the first: second] of the projection optical system-les-down's] 7 and the second-les-down's 1 8 Ri by the, and Oh Ru image between images during the 1 ffij 1 9 two units Katachiibitsu Imaged, first in Mazo are shorted with a third les emission's 2 Y and the fourth Les emission's 2 1 of the first projection optical system, Ah during the second Mazo! Keystone distortion in I 2 2 that it ¾ image as the Mazo in the second. 笫 7 first first-les emission's 1 7 image side focal plane and the second record emission's of the projection optical system in earthenware pots by Ru is shown in FIG. shall be the intersection line of the main flat surface of 1 8. and the plane parallel to the Z-axis includes g of this, the intersection line between the first ^ 3 of the projection optical system of Les emission's 2 Y main plane of g . 9 and you笫1 focal third image-side Le emission's 2 0 of the projection optical system ': a plane and Z plane including axis points and g 2 that Majiwa, fourth Les emission's 2 1 of you and the intersection of the intermediate image plane 2 2 intersecting lines hints Z plane parallel to the second to the axis of the main plane g. object side focal plane and the second second projection optical science system 6 of 'a g and the' intersection line g of the intermediate image plane 2 2: Ru to match the cormorants I was shown in FIG. The second intermediate image distorted trapezoidal cormorants good third diagram scan click rie down 7 as a not name the image of the trapezoidal distortion on the power sale good of FIG. 4 Ri by the second projection optical system 6 Ru is focused on.

Figure 8 is a first projection optical system, Ru another embodiment der configured in two les emission's two sets have a parallel to each other. Ri by the and this for the second record emission's 2 5 of the first projection optical science based on negative les down's, Les emission's interval cormorants good illustrated f 1 / cos phi chi one f 2 / cos phi door have in the short rather, shea scan Temu co-N'no,. ∎ it can in this and the force "you to click door. Contact figure 2 3 La wells valve such, 2 4 Chapter] projection system first Les emission's, the first intermediate image plane 2 6, 2 7 3 Les emission's, 2 8 4 Les emission's, two 9 shows the second intermediate image plane.

Is found in FIG. 9 is a projection optical system of the 'a, Ru another embodiment der configured in two les emission's two sets have a parallel to each other. Ri by the fourth Les emission's 35 of the first projection optical system and negative les down Zunisu Ru this, Les emission's interval cormorants good illustrated f 3 Z cos 0 3 - f 4 / cos ø a and has in short rather, that Ki out and the child you the S ystem to the co-down path click bet. Such in our drawing ': 0 La Lee Bok Valve, 3 1 the first record emission's first projection system, 3 2 the second les emission's, 3 3 during image plane in the first, 3 4 the third les emission's, 3 6 illustrates a second middle plane.

I and the but Tsu to each of the above embodiments lever, it first projection by the optical hand stage Ri Ri rather suspended between images in Ru Oh trapezoidal distortion, trapezoidal distortion Ri by the second projection optical means the still picture to have you to create Ru oblique projection type display apparatus, Ri by a first projection optical means and this by the use of two record emission's also rather low has a parallel to each other, the light modulation Ki out and the child that be illuminated in Ho means pot parallel light, is the Ru Ming and against the full-screen, ∎ you can in co-down door La scan this non-et you a few clauses of the door and the force ". Also, have Do small of-out slope of each record emissions's Ri by the and the child that make up in two or more sets of two-les-down's not such a parallel to each other a projection optical system of ¾j 1, sand that Ki out and the child that provides good projection display device of the few not the imaging performance of Chi aberration.

Et al. Is, can and shall be the rear-projection-type display equipment incorporated into key catcher bi Netw Bok, key catcher bi Netw Bok of volume Ri by the oblique projection, Ru to significantly reduce-out depth, especially can be and child and Do Ri, ∎ it can at this and power that Kyosu the co-down path click Bok display device.

By the projection optical system of the above ¾ lever, La Lee Bok valves in almost because and this you lighting was Ki that out at a constant angle of incidence, the small yet oblique projection of the of Brightness No et al display device but that Ki out and the child that provide is a resolution on the scan click rie down, the rose tree tree in the vertical direction Remind as to scan the pop door dialog § g view of the second FIG. 1 Out .

Their is have you in the present invention in this, that have Figure Tsu the resolution of the oblique projection by Ri above-mentioned problems in and this you place a mechanism that Ri down to the optical within the system o

The second 2 Figure Ri Contact to show the layout of oblique projection optical system disposed above diaphragm Ri mechanism, the second 3 view (A) ~ (C) is Ru Tei indicates Ri shape example grain.

筇 to have you in 2 2 Figure, the optical axis of the first projection first record emission's 8 Y of the optical system, a second optical axis of Les emission's 81, the optical axis of the third les emission's 82, the optical axis of the fourth record emissions 8 3, the optical axis of the aperture Ri mechanism 8 4, the optical axis of the second projection optical system 8 5, La wells valves 8 6 normal and scan click rie down 7 normals, Ru Oh on the same plane. 8 7 The first intermediate image plane, 8 8 show a second intermediate image plane.

Light source 1 at the second 2 figures were or parabolic xenon Roh down run-flop-out with the reflector in the meta Ruha Lee de run-up, the lattice La wells valves 8 6 liquid products since the Jo electrode with distribution g was also in earthenware pots by ∎ you can control the transmittance of each pixel, aperture Ri mechanism 8 4 Ru also for the use of the shape shown in the second 3 FIG.

First:! First Les emission's 8 0 and the second record emission's 8 1-out angle 5 1 but only inclined to physicians each other, 笫 1 image side Asetaira surface of Les emission's 8 0 and 笫 2 Les emission of the projection optical system 8 1 product side focal line of intersection force of the plane's; 'Ζ Oh placed Ni Let' s Ru on the axis, the first-les-down 8 0 your good beauty second-les-down's 8 1 of focus ώ is on the Ζ axis place the diaphragm Ri mechanism in a position that Majiwa, the third record emissions 8 2 of the first projection optical system 4 Les emission's 8 3 angles <5 2 tilt-out to physicians each other, the third record emission's 8 2 of the image side focal plane you placed Ni Let 's Ru Oh on the fourth Les emission's 8 3 things side focus Z-axis intersecting line is almost planar. Et al is, the second intermediate image Thus 8 8 a ​​second projection optical system 8 5 and scan click Li one down 7 Ru disposed Ni Let 's extended surface of each is that Majiwa collinear.

Light emitted Ri good light source 1, La wells valves 8 6 was nearly parallel to the illumination, La Lee Bok valves 8 at 6 over the entire surface, Ru uniform bright and co emissions Bok La be sampled Chikarakutoku et al Re that. Image of La Lee Bok valves 8 6, through the first projection 笫 1 Les emission's 8 0 of the optical system and the second record emission's 81 and the diaphragm Ri mechanism having the shape shown in the second 3 view (A) Tsu and, the first intermediate image plane 8 7 as the Oh Ru image of trapezoidal distortion is imaged, the first intermediate image and the third-les emission's 8 second and fourth Les emission's first projection optical system 8 3 by the Ri, the second during image plane 8 8 as the second in Mazo Ru Oh trapezoidal distortion is imaged, the second during image plane 8 8, the second projection optical system 8 5 I Ri as a not name the image of the trapezoidal distortion to you focused on the scan click rie down 7. Scan pop Bok Daya g view of the door-out on the scan click rie down 7 of This bus Rajin key Ri is Do rather small Remind as in the second FIG. 4, resolution is good, rather Ru Ming also to light, a few have the image of the non-Luo that Re obtained ©

Contact Ri Do One in the second 3 view (B) are shown diaphragm Ri mechanism 8 4 Non Shi form shape, similarly to the above ffi ^ 施例, the light flux emitted Ri good source 1 shown in the second 2 Figure One stomach, resolution-out bad 縱 direction of Installing divided by Tsu by the light beam to the mechanism 8 4 to Ri grain, in a call you to cormorants I pass by Ri multi-click the light beam in the horizontal direction has good resolution, resolution even Tsu grain in grain Ri mechanism 8 4 in order to Ru raised has little of the loss of the amount of light image is Ru is obtained, et al. Chi I sand 笫 2 2 second 3 views in the optical system shown in FIG be used shape of the of (B), the scan pop preparative die A gram-view on scan click rie down 7 the Remind as the second 4 Figure, rose tree key Ri is Do rather small, resolution is good, little has image Brightness rather No et al Ru are obtained, et al.

Nodea also gave an A over Honoré each interior angle aperture Ri mechanism 8 4 Wahi to form the shape shown in the second 3 Figure (C) is, as above Symbol embodiment be One by the Re this resolution is good, Brightness rather than free et al little image can be obtained.

More than cormorants I said, to have you in the oblique projection optical system, even if Tsu down in Tsu by the grain Ri mechanism in the eyes Ru obtain high-resolution, resolution in the state have small, the loss of the bright Ru of that Ki out and the child to raise is.

Its further can and shall be the rear-projection-type display device incorporating the key catcher Binet Tsu Bok, the key catcher Binet Tsu Bok of volume Ri by the oblique projection, in particular, can be and this you greatly reduce-out depth and Do Ri, in co-down path click door, resolution is good, that Ki out and the child to provide a few have display equipment of the loss of Brightness of.

Na us, the position of the above-described diaphragm Ri mechanism, the second 2 is only I Ru limited to shown the example in the figure rather than in the focal plane of the two positive-les emission's have a parallel to each other if Re position der Ru good intersection line is that Majiwa the Z-axis, Ru shows the of the 'same effect can be obtained in this embodiment.

Chi I sand, in the intersection line force "Z SaiwaiYukari and exchange Wa Ru position of the third record emission's 8 second focal plane of the fourth record emission's 8 3 focal plane shows the second 2 Figure , but it may also in the first-les-down position that Majiwa and Z ΐ why the intersection force rather than the focal plane of FIG. 3 and the second-les-down FIG. 4 shows in Figure 1.

Is found in the first '3 Les emission's 2 7 focal plane intersection line is Z-axis and the intersection Wa Ru position of the focal plane of the second record emission's 2 8 which shows in FIG. 8, have Ru Ah is but it may also in the first-les-down's 3 1 of the focal plane and the intersection line force between the second-les-down's 3 2 of Asetaira ffij "Z-axis and the exchange Wa Ru position which is shown in FIG. 9, to the next Akira theory to have One to lighting instrumentation S.

The second 5 Figure you are shown a main cross-sectional view of a first embodiment of a lighting equipment that you only to present invention.

Match for to Chi, and placed at the focal point of run-flop 5 3 Li off of the parabolic shape Selector Selector 5 4, in front of the re off Selector Selector 5 4, the light Gakumoto terminal 7 0 Deploy . One surface of the optical element 7 0 vertical to the central part the middle is concave surfaces 7 Y a and has been our Ri around the optical axis, and the other that has Tsu lifting a plane perpendicular to the optical axis. Concave 7 0 a of the optical Sakuko 7 0 is the center of Ho throat inclination that has Tsu Do not rather come large.

The Chikaraku one by run-flop 5 3 power, light 朿 you al emitted is reflected by the re off Selector Selector 5 4, you enter the optical element 7 0. In here, the center F unit force of the re-full-les-click evening 5 4, et al is not a come out the light beam. Also, if Re only the light-emitting portion is very small in the run-up 5 3, run-up

3 power, light beams emitted et is that shines out as a by (comp) all parallel light Li off Selector Selector evening 5 4 parabolic shape, La emitting portion of the down-flop 3 is the order of a few millimeter eyes of the atmosphere was Ru Oh, focus. place place S or al out Cum the light beam deviation Ri by g of Li-off Selector Address 5 4, Li off Selector Address 5 from 0 to a few degrees of angles 4 force, et al emitted.

The light beam to the cormorant good of this than Ru Tei Tsu also a 0 to a few degrees of angular components, Li off Selector Address 5 4 force, and et al. Oh Ru distance Ru away, was Tsu also the angle also Ru Oh in the heart the light beam force "clause Let 's that Ni that Do not. When you place the optical element 7 Y in here, refracted Ri by the concave 7 0 a of the optical element 7 Y, the light flux angular component Ru Ah is ing parallel to the optical axis. Chi the sale of the light beam incident on the optical element 7 0, even to that incident on the peripheral portion, Ru exit Ri through the or or optical element 7 0 of that. Therefore, the light beam has passed through Ri through the optical element 7 ϋ is, that Do Ni Let 's also suspended the center or we periphery or in flat row component.

Ri by the being this, the central portion cormorants good third 1 diagram rather low, the luminous flux distribution of the hollow defect state of also Tsu § lighting was Tsu ii, the center in the Hare yo of the second 6 Figure Oite also that Ki out and this shall be the Yo will Do the lighting device that fully parallel light beam is obtained.

Second 7 Figure Ri principal sectional view showing the second embodiment, before SL as in the first embodiment, run-flop 3, Li off Selector Selector 5 4, place the optical element 7 0 ing . Optical element 7 0 Contact only that the embodiment of this is, one surface, the central portion is convex 7 ◦ b der is, around the vertical to the optical axis and the other has Tsu lifting a plane perpendicular to the optical axis that. Optical element Ryo - 7 0 Totsu而 7 0 b of One Do rather can center ho throat inclination most instances ο

Similar to the but the 笫 1 embodiment in Tsu, a light beam incident Tsu also ft of components 0 and a few degrees in the vicinity of the center is refracted Ri by the convex surface 7 0 b of the optical element 7 0, light beam Oh Ru angular component ing parallel to the optical axis. Chi the sale of the light beam incident on the optical element 7 Y, the even entering the peripheral portion, Ri that fastened securely through the or or optical element 7 0 of that. Thus is their luminous flux Ri was fastened securely through the optical element 7 0, that Do Ni Let 's also suspended the central portion or et periphery or in parallel component.

Wherein Ri by the being this first Example as well, the lighting center on Cormorants good third Figure 1 is Tsu lifting the luminous flux distribution of the fastened securely state in rather low, the central portion cormorants good second 6 Figure enough parallel light beam can have you on is that Ki out and this shall be the Do the lighting device Let 's that are obtained, et al.

The second 8 Figure Ri Ah major cross-sectional view showing a third embodiment, before SL similarly to the first 1 ¾ 施例, run-flop 3, Li off Selector Selector 5 4, the optical element 7 0 distribution It is g. Optical element 7 0 Contact only that the embodiment of this, the central portion of both sides is concave 7 0 a, 7 0 a. Periphery that has Tsu lifting a plane perpendicular to the optical axis. Concave surface portion 7 of the optical element 7 0 0 a, 7 0 a is brewing ho throat inclination One Do not rather than can large close to the center -S> o

Similar to the but the first embodiment in Tsu, light beam morphism person Tsu also angles component of ◦ ~ several degrees near the center, the refracted Ri by the concave 7 Y a of the optical element 7 〇 , Ri by the concave 7 〇 a opposite to the al) and folding, light 朿 angular component Ru Ah is Chi sales of light beam incident <optically 尜子 7 0 ing parallel to the optical Io, the peripheral portion It was also incident to the, Ri that disconnect only through the or or optical ¾ terminal 7 0 of it. Therefore is its light beam has passed Ri through the optical element 7 Y is that Do Ni Let 's also suspended the central portion or et periphery or in parallel component.

Before Ri by the Re Two, as with 记 Example, mainly illumination centered portion has one lifting a light flux distribution state obscuration rather low in cormorants good third Figure 1, the cormorants yo of the second 6 Figure enough parallel light beam even in a part is that Ki out and this shall be the Do the lighting device Let 's that are obtained, et al.

Second Figure 9 Ri principal sectional view showing a fourth 突施 example, before Ki笫;! Similar to the embodiment, run-flop 3, Li off Selector Selector 5 4, Ru Tei arranged optical element 7 0. One surface of the optical element 7 0, the central portion is concave 7 0 a der is, their this force, et Re off Selector Selector 5 4 diameter and perpendicular to the optical axis in the Ji径Ma, is its La this force, et al periphery 7 0 c is a wall thickness of Ru Tei as soon as a thin Ku Tsu Do not. The other side was or is Ru Tei vertically Tsu name to the optical axis. Concave 7 0 a of the optical element 7 0 Ru Tei center ho throat inclination Tsu Do not rather come large.

Similar to the but the first embodiment in Tsu, a light beam incident Tsu also angular component of 0 to several degrees near the center is to iui folding Ri by the W surface 7 0 a of the optical element 7 0 , the light flux angular component Ru Ah is the optical axis, 4 ': ing a row. Chi sales of light 朿 incident on the peripheral portion 7 0 c of the optical element 7 0, the component Tsu also angle Ru Oh outwardly, or to the optical axis plane ascending in ing, have Ru Oh the Ri slightly fool inner the direction clause. The also incident on the plane perpendicular to the optical axis of the intermediate portion, Ru exit Ri through the or or optical element 7 0 of that. Therefore, Hikari朿 is exited Ri through the optical element 7 0, the center portion or et periphery until in parallel, Ru have the that Do Ni Let 's also suspended parallel to the near components Ah.

Wherein Ri by the being this 笫: Similar to L Example, the lighting center on Cormorants good third Figure 1 has one lifting a light flux distribution state obscuration rather low,

2 FIG. 6 jar in the center to your have enough parallel light beam even if good of the obtained et al one 5 - that Ki out and this shall be the Re that Yo I Do not lighting device. Light of your only that portion K to 笫 3 1 Figure light der Ru around that Tsu kana you to use until the Re this was or even that Do Ni Let 's that come in use.

The force "one by the above% 施例 by lever, run-up force, Hikari朿 was al emitted is reflected Ri by the Re off Selector Selector, near the center parallel component is not name status in you exit, but Ri by the optical element described above in front of the re off Selector Selector in the this location rather, that Ki out and this shall be the light beam has one lifting sufficient parallel component in the center.

The cormorants I was shown to the fourth embodiment was or, if you use the optical element thickness of the limited et al portion of the periphery that have One Do rather thin, was Tsu kana you to use in which this or the periphery of the light also, that Do Ni Let 's that come in use, therefore are their, using an illumination So匿 of this, if the project the image that will be formed in the liquid crystal or the like to the scan click rie down, Ru Ming of the almost uniform extended projection image that Ki out and this give Ru a.

3 2 Fig-3 7 figures it is shown another embodiment of the optical element 7 0.

Embodiment shown in the third 2 figures than even the two optical element 7 0 d, 7 0 e cross-section conical bottom of its disposed cormorants I intends stand can countercurrent, For example Li off Selector Selector 5 4 places trapezoidal paraboloid of run-flop 5 3 power, light beam force you et exit "re off Selector Selector 5 4 by the Ri approximately -, 1; - Tsu Do and Yukimitsutaba Te enters the number 1 circle 維形 optical element 7 0 d, 2 number to Ru position name upside down by pairs Tsu by the folding the optical axis of the light 朿 t: i conical optical Sakuko 7 Y of place the e, substantially parallel light Tsu by the W folding of the cone-shaped optical ^ child 7 0 e of this bunch Α and ing. Ri by the being this third 1 also the center has Tsu dark light flux distribution der to cormorants good you only that the conventional example in FIG third 2 two conical light optical element 7 illustrated in FIG 0 d, Ri by the 7 0 e, Ru light flux distribution door shown in the third Figure 7.

Embodiment shown in the third Figure 3, the above two optical elements 7 0 d,

The 7 0 e Urn Chi exit side of the optical element 7 0 e has a structure that having a concave conical surface 7 0 f also Ru Nodea. In this case it was this and Li off Selector Address 5 4 of the parabolic shape For example Ri by the, run-flop 5 3 force, light flux et al emitted, Li full-les-click of the parabolic shape motor 5 4 Tsu Do a substantially parallel light flux Ri by the incident on the first of the conical optical element 7 0 d, you refraction. The light beam Ri by the refraction, that Do Ni Let 's that rather than be in the vicinity of the optical axis was Tsu among the first parallel Ingredients. This second conical optical element 7 0 The Ri by the and this you place the e elements 7 0 e ing a substantially parallel light beam B in Tsu by the refraction of the position. I Ri 3 1 Figure your only that conventional light flux distribution conical optical element Ding to be this 0 d, 7 0 e Ri by 〖this, such a light flux distribution shown in 3 Figure 7 o

3 4 Figure 3 two optical elements 7 0 d 2 Figure, a 7 0 e and those phases to be calculated and integrated, 3 5 Figure two optical elements 7 of the third 3 Figure 0 because d, 7 0 e also you corresponds to also integrated, third 2 view either case, Ru 3 three figures and the same effect obtained et been.

3 6 Figure the input reflecting surface of the conical optical element 7 0 d on the incident side and the concave surface 7 0 g also of a conical optical element 7 0 e of the exit side a third 2 figure of al Ru also DOO same Jidea. Even Tsu by the above-described embodiments, run-up force, Ri by the light beam reflected by the re off Selector Selector and al emitted and this through the beam into the conical optical element, substantially uniform parallel distribution that Ki out and give Ru this the light beam. Ri by the and this this, a substantially parallel beam of this as a light source when projecting the image on a scan click rie down, ing substantially uniform image of Brightness of.

It describes the reflection Mi La over to the next.

3 Figure 8 (A), (B), the reflection Mi La that you only to present invention - Ri Contact with shows a cross-sectional view of can and Ru strain Migaa Third 9 will Yo shown Do image , Ru Oh than even cormorants line distortion correction in each direction of the arrow.

Fourth Remind as an example of a projection type display device of the present invention in FIG. 1, the projection optical Interview two Tsu Bok 3 9 and a first reflective Mi La -4 0 a, a second reflecting Mi La - 4 1 and a, and a third reflecting Mi La over 4 2 a, scan click rie down 7 force, Ri of et, the projection optical Interview two Tsu Bok 3 9 cormorants I was shown in Figure 1, the light source 1 When a La wells valves 2, a first record emission's 3 first projection optical system, a second record emission's 4, constituted the second projection optical system 6 or al 'projection display device Ru been et al have use. Action of the projection optical Interview two Tsu DOO 3 9 you incorporate the description of had One in Figure 1.

Third 9 Remind as in the figure, reflection Mi La chromatography (indicating collectively, 4 〇 a representative code) image 5 6 distortion of on the scan click rie down 7 that come your in-out door of the plane ( and have you in the fourth FIG. 3), the case ① the direction of the distortion sleeve positive is required, distorted 'song that was Oh the required partial reflection Mi La over 4 0 a part of the third 8 view of correction (a Remind as in), with a call you partially convex song Oi, Remind as to the 4 Y diagram as the name listed picture 5 6 'distortion songs, binding to the scan click rie down 7 that Ki out and two-for Ru to image. Also, if distortion ToTadashi of the direction of ② is required, a necessary part portion of the reflected Mi La over 4 0 a that was Oh to the distortion correction Remind as in the third FIG. 8 b), partially in a two-you to the concave surface, and the fourth 0 not name image of the distortion Remind as in Figure 5 6 ', Ru can in this and the force "that Ru is imaged on the scan click rie down 7.

Chi I sand, had part of the enlarged both images 5 6 is a third 8 views (a) to 0 Yo if Ni reflective Mi La one 4 to a a convex direction curved surface reduces the images 5 6 had part you reflected Mi La over 4 0 a Remind as the third 8 view (b) in the concave direction of the curved surface.

And have you in the projection-type display device described in the above 施例, vinegar click U - One Do small Repetitive by image 5 6 rather than the name the required magnification scan click Li one down Size Lee's on the down 7 was Badai, reflected Mi La over 4 0 a of the entire surface: ¾ 3 8 view between this you into a cylindrical shape of the convex curved surface (a), the not name the image distortion Remind as in 筇 4 ϋ 5 as a 6 'Ru can in this and the force that Ru is imaged on the scan click rie down 7. In addition, the scan click rie down Size Lee If you Do One rather come large Ri I's, and this you into a cylindrical shape of the concave surface that shows the entire surface of the reflection Mi La over 4 0 a third FIG. 8 b) , Ru technique out and the child that Ru is imaged on the scan click rie down 7 as a fourth name listed picture 5 6 of distortion Remind as in ϋ view 'is.

Structure of your above-mentioned reflection Mi La over is that you to this and force "you ffl applied to one or more of the Chi sales of a plurality of reflection Mi La over 4 0 a ~ 4 2 a in the above-mentioned optical system . I lever in the examples of this in the jar good of the above, have you in the projection-type display equipment using the oblique Me projection optical system, to throw Cum-les-down's and reflection Mi La over of the swash Me projection optical system even in distortion and required magnification of Tsu good raw Ji that image have parking block, such Re obtained, et al., that Ki easily out modified Tsu by the one or more reflective Mi La one also with small greens rather. Doo-out of this, bins Bok of the shift in the depth of focus is not deep, but throw Shakyori is Ru partially strange Wa projection optical system is a practical question 题 is not name.

It describes the scan click Li over on to the next.

4 5 囟 are we are shown the field stand oblique view of applying the transmission scan click Li one down that by the surface projection profile di Interview click evening to an embodiment of the present invention.

The projection optical Interview two Tsu Bok 3 nine et emitted light is Tsu by the reflection Mi La one 7 2, 7 3, 7 4, 7 5 optical path of that is converted, Y over type scan click rie Ru is projected onto the back of the emissions 7. Transmission scan click rie down 7 This is formed as a port Li Ka turbo Ne wells (PC) or other port Li main Chi le meth § click Re-les over preparative (PMMA) material Contact is, 4 4 Figure (a) Contact good beauty (b) is that not shows the perspective view Contact good beauty partially enlarged cross-sectional view of a transmission scan click rie down 7 of this. The light incident surface of the scan click Ri one down 7 infinitesimal flop rhythm A L'over 7 a is formed on the light exit reflecting surface that has been down Chi queue La over 7 b are formed. Micro-flop Rhythm A L'over 7 a cross section is the shape formed in a triangular shape, flop Rhythm j of each flops Rhythm Mr 4 Ni Let 's you later). That is formed on 5 0 ° hereinafter more.

That due to the present embodiment the transmission type scan click rie down 7, because flop Rhythm apex angle of that is that has been formed small Repetitive by conventional, or et leak-flops rhythm § record over 7 a that amount is reduced, the loss of light quantity incident that has been reduced. Me other of its traditional good jar to light leakage Ya Wuyi be sampled is not such occurs. A child of the generation of light leakage and go be sampled and by that Tsu by the above-mentioned transmission-type scan click rie down 7 to the present embodiment is Ru is suppressed effectively been following solution by Ri sure to fold ^. The Kaiori results of this with reference to 4 6 Figure-4 8 Figure you described.

4 6 figures this a partially enlarged cross-sectional view of a transmission scan click rie emissions which had use shows the Kaiori, this transmission scan click rie down rear projection profile di E described above the that apply to click data. Name your, In its fourth FIG. 4 and the same parts Nitsu to have you in the drawing Ru Tei have use the same reference numerals. And have you in the fourth 6 This figure, the projection optical Interview two Tsu door 3 9 force has been reflected Tsu by the Mi La over 7 5, the light of the Luo Jtii folding in-flops rhythm A L'over 7 a and, Le emissions Chi key Yoo la one 7 b force, Ru is al emitted. Or Mi La - in Tsu by the Ding 5, the light that has been reflected leakage is part of its in-flops rhythm A L'over 7 a, this leakage light is you totally reflected by the light-emitting surface 7 b . After passing through the total reflected light is 3-4 amino flops rhythm, and total reflection have you to flop rhythm incident beyond the critical angle alpha, Les down switch key Yoo la one 7 b It emitted to the observation side and through.

To have you on the transmission type scan click rie down 7 Do not Let Yo of this, the results of the proportion of light leakage 2 your only that in each point of the scan click rie down was t calculated the fourth 7 view your good beauty 4 S Ru shows and Tei in each graph in the figure. The horizontal axis of each graph is you are shown a scan click rie down position (mm). Position 0 is the table in the vertical direction of the center point of the full-les ne les-down's 7 a, the other figures the distance traveled in mind point or al on de each direction in this was or you are Table , 縱 ΐ reason of each grayed La marks Mi La one 7 5 or et al cormorant Chi some percentage is Ru leakage and have it leak rate of reflection to have light [] the shows to have such o Also, and have you in each grayed La off, the blanking Lock door of shown by the solid line is Ru Ε line is blanking-flops Rhythm apex angle force of Rhythm a L'over "5 0 ° of place! Kaiori result of Table and, blanking on the line that will be shown by a dotted line Lock metropolitan Bed Ri's arm apex angle force "4 7. , Only-flops Lock I you are table a place table of analysis Yui粜 of-flops Rhythm apex angle of 4 5 °. Also, 'the light incident angle that you only to each grayed La-off, one or is, the normal direction in pairs to angles that have had inclination of the incident light force "scan click rie down surfaces have you in center Oh Ru in Te 6 0 °

.Qj 4 7 figures transmission scan click rie down 7 atmosphere of a 4 0 fin Ji throw distance L: 1 2 shows the calculated Yui粜 of the case and ϋ ϋ mm, drawing transmitted the atmosphere of the type scan click rie down 7 5 ϋ fin Ji, it is ¾ calculation binding ¾ of the projection distance L of 1 8 ϋ mm and the field ^. Each grayed La full or et al., The corner of the flop Rhythm m angle is it small clause. And this light leakage rate decrease that the Ru understood. You Do not be Chi, 33

4 7 ¾5 4 0 inches screen diagram flop Rhythm apex angle

5 (1 ° DOO-out the of center point force in the scan click rie down, et about 2 1 U (Π ΠΙ

F 7 ?, one was beginning to Re light ¾ occurs at position during, or Ri; is One in ia is that if the light leakage rate is 增加, central force, et 3 [) ϋ m in force <one vinegar click Li - down position! ¾ light leakage rate ■ is it reaches to about 2 to 4%. DOO Bed Li's 厶 the apex angle-out bets 4 7 ° is center point force in the scan click rie down, et about 2 7 0 mm I One was much g light leakage occurs in beginning to 3 0 0 m πι under force "one light leak rate scan click Li one down end position ing to almost 1 0 ¾. Also, flop Rhythm apex angle force "4 5 ° bets-out in the center force, et 3 0 0 in m under power" one has scan click Li one down end Ji raw leakage very Ku little light position Oh Ru in the body of that. 4 0 Lee down 縱 length of the switch screen scan click rie down 7 in case of Ri Do to 6 0 0 m in, measured and evaluated in the range of 3 0 0 mm at the center or al the upper and lower directions the not good be carried out. Also, the fourth 5 Figure force, because the bottom side is light people elevation angle is that small Do Ku La-understood Ru by cormorants to the scan click rie down 7, are shown in the above analysis results central force of Ni scan click rie down Let 's that, towards La lower side that Do not light leakage rate is rather high. Me other child, vinegar click rie down central force, ing in and the child that Ri Toe performed an evaluation on the screen position La lower.

The force "one in, the field stand 5 Y inch screen 4 Figure 8, the longitudinal length is 7 5 0 m eyes ing the ra of the scan click rie down 7, scan click central force of rie down, not good by performing the analysis evaluation within the range of 3 7 5 mm in La under direction. In this case, the-out bets flop rhythm around the corner force 5 0 °, the light leakage begins to occur at the location center or al about 2 9 0 ra m under the One was, central force, et 3 7 5 mm light leakage rate under force Ku one was scan click rie down end position is reached in about 2 2%. Also, up rhythm apex angle of 4 to 7. And the can of the central force, et about 3 6 0 m in under force "one has scan click Li - down position light leakage occurs in beginning to, central or et 3 7 5 m in under force; 'one was light leakage rate scan click Li one down end position g is ing about 5%. Also, up Rhythm apex angle of force "4 5. And to come to, light leakage is generated, such has good jar in-flops Rhythm A L'over the flop Rhythm apex angle force of c this "5 0 and ° or et al., Down one have rather, light leakage rate It is rather have low Ku One Do gradually. When the blanking Rhythm apex angle of force "4 5 ° or in small Ku ing, 4 0 inches, 5 0 inches screen raw Ji name rather than that Do etc. does O coercive leakage light in. Also, up Rhythm top ft force "5 0. DOO-out light leakage rate 4 0 inches screen of the scan click rie down end ing to 2 4% position Chikaraku, if Re Oh in leakage of the extent of this, Ri disabilities and difference on a ¾ There 's even of the thinking we are Ru. The force, and, up Rhythm 顶角 Ri is Do rather than the apex angle portion ease only missing and small Ku ing, or, because moldability you only that at the time of resin molding is that Do rather than evil, the lowest and this Ru Oh 4 0 ° or more at is not the Nozomi or. In its call, the flop Ri by the each-flops Rhythm apex angle of the Rhythm A L'over 7 a 4 to and this you formed by ϋ ° more than 5 0 ° below the range, light leakage Ya Wuyi scan Bok of that Ki out and this effectively prevent the occurrence.

Also, that are due that the projection optical Interview two Tsu DOO 3 9 of the light source is found have use high have air- Roh down run-up of the directivity in the present embodiment. Me other child, Ni Let 's that are shown in the fourth FIG. 9, the field of view Α force of the optical path of the leaked light the human question of the eye 5 9, Ri by the and this remove, et al., Gore-over be sampled people question that Do Ni Let 's seen ^ are such are in.

By the 灾施 example of this in the jar good of the above lever, micro-flops Rhythm § record - set the each-flops Rhythm apex angle below 4 0 degrees or more 5 0 degrees, up Rhythm apex angle are shorted with a and a child that has one Do small Ku, light ≤ that Ru leakage et al or-flops Rhythm a L'over will decline, ί loss of the amount of light that is incident Ru is reduced. To force "one and, if Re good to the transmission type scan click rie down of this, Gore-over be sampled and light leakage is such ku Do Ri, Ru ί¾ a bright Ru decoction High Κ of images this and the force" "J ing to function.

- How, La wells alve of 稻 this conventional rear projection display device that had ffl the scan click Li one down 7 side Remind as the fifth 2 Figure in order were cormorants line thinning I had to have the angle of incidence cr in pairs. This door-out of the angle of incidence α is 6 ϋ. Ru Der below. Placed in the scan click rie down 7 projecting Shako 9 reflection of the final that ϋ Ru to Cum people the real La over 9 1 to the scan click rie down 7 and the line was Tei.

And whether the tooth, in the above-described conventional de-office flop Tray type by that display device to the rear projection of, in the eyes of the non-force 6 0 ° less than the angle of incidence of the vinegar click rie down 7, click rie down 7 and Ki out final height heavy Do Ri moiety in the direction of the reflected Mi La over 9], the external light 9 2 that by the Department ^ of the lamp such Remind as the fifth 3 FIG morphism human for example for angular ei Chikaraku 6 0 °, about 1 5.4 3 is reflected Ri by to the reflected Mi la -9 1 transmits outgoing angle 3 'and by Do Tsu scan click Li one down 7 ° first 5 4 Remind as in FIG, about 1 5. 4 3 ° of incident on the incident angle of 0 3 'desk rie down, exit angles 0 and i Chikaraku 6 0 ° and Tsu Do scan click rie down in order to you through the, fifth 5 Remind as in the figure shaded portion of the scan click rie down 7 surface Tsu baggage and Ri was Tsu Ku light white, Ji raw co-down door La be sampled decline not that we have problems.

Order to you deal with the problems described above, the incident angle against the scan click rie down 7 Remind as in FIG. 5 6 In the this that make myself even an angle of more than 6 0 °, scan click rie down 7, than the final height of the ^ Do Ri portion of the reflected Mi La -9 1 of Ru is rather small, the external light 9 2 Remind as the fifth 3 1 ^ 1, morphism human for example corner e J force "6 ◦. Of the case, about 1 5. 4 3 ° emission angle ,, 'and Do Tsu to scan click rie down 7 ϋ over to reflection Mi La over 9 1 is reflected Ri by the will scan click rie down even if the 7 that Do rather than incident to.

If the but in Tsu Re good to the embodiments described above, and have you in the projection-type display equipment that use the oblique Me projection optical system, Ru white urn rather light of that by the external light scan click rie down than ∎ you can partially cutting 'in, dropping, reduces Control This setup La be sampled low down, a Control This setup La be sampled for Film images that Re et.

Industrial Applicability

In of Brightness No et is rather name uniform Brightness of screen is obtained, et al is, distortion and light and Les name has a projection type display apparatus Kasokezo, the key Ya bi Netw Bok Thailand flop especially that text to you for 禾 ij on the display device.

Claims

誥 required of range
1. A light source, a light modulating means, possess a projection means you project an image to the scan click rie down light Ru generated by the modulation means, and a scan click rie down, is projected by the projection means that the central light things ώ the projection light at the projection type display device you incident obliquely against the scan click rie down, the projection means an image generated by the light modulation means trapezoidal distortion Oh the first projection optical hand stage that converts the intermediate image Ru of the front, the second projection that converts to have name image trapezoidal distortion of Ah Ru intermediate image of 记台 type strain on scan click rie down Ri Na is whether we configuration and optical means, said second] projection optical means, the projection display device you characterized and this that have a two-les emission's have a parallel to each other physician.
2. The first projection optical means and said parallel at an unsupported two les down's of the light source side of the light source side Le emission's of the scan click rie down side focal plane scan click rie down side Le emission's claims intersection line between the focal plane, characterized that you are disposed cormorants by passing a straight line connecting the main point of the light source side principal point of les emission's and scan click rie down side Le emission's projection display device of the range the 1 ¾ described.
3. The first projection optical means, the two-les emission's and was first ¾ or scope of TsumeMotome you wherein this that Yusuke two or more pairs also rather low has a parallel to each other projection display instrumentation of described second term
¾ ο
4. A light source, a light modulating means, possess a projection means you project an image to the scan click rie down light Ru generated by the modulation means, and a scan click rie down, is projected by the projection means that the central optical axis of the projection light in pairs in the scan click rie down to have your projection type display device you incident Me oblique, the projection means, trapezoid image generated by the light modulation means a projection optical hand stage of 笫 1 that converts the Ah Ru intermediate image distortion, Na has a second projection that will change the image of the trapezoidal distortion of Mazo in Ru Ah of the trapezoidal distortion on the scan click rie down optical means is constituted by a light control to snare Chi image quality improvement rows cormorants diaphragm Ri mechanism, the first projection optical means, the rather small two-les emission's have a parallel to each other physician also 1 Kumiyu to, said the setting digit this in a projection optical unit said diaphragm Ri mechanism projection ^ indicates device.
5. Near intersection of the straight line connecting the main point of the diaphragm Ri mechanism positions the two have a parallel said Les down the line of intersection between the two les emission's that by the Asetaira ώ of's projection display device of the range paragraph 4, wherein the arrangement was TsumeMotome.
. 6 ¾ the shape of the diaphragm Ri mechanism - like the claims was the 4 ¾ or of the projection type display device according to paragraph 5.
7. Run-flop and possess a re off Selector Selector, wherein Re off Selector Selector empty Re off Selector Selector evening by Ri reflected light 朿分 fabric obtained we are Ru in the the exit side of the substantially uniformly projection display instrumentation you a lighting device the light transmissive optical elements are arranged in order to you.
8. Projection display instrumentation before optical ^ child of one side or both sides of limited et part was concave or in the middle, wherein the range 7 of claims that have been formed on the convex surface.
9. The projection that the thickness of the limited et portion near the optical ^ child having a lighting device according range 7 of claims you characterized and this Ru Tei Tsu Do rather follows the second thin display device.
1 0. The projection display device in the range 7 claim of claim the optical element was conical.
1 1. Projection Table i ^ o of the conical optical element and to claims first 0 claim of placing the two conical light Gakusakuko convex
1 2. The conical optical element using two, first the conical optical element and convex, the second range first claims conical optical element is arranged in a concave shape 0 Section projection display device according.
3. Throw morphism display apparatus range first 0 claim of claim in which one conical optical elements are arranged in both sides convex shape and the conical optical element.
. 1 4 wherein said claims one surface with a conical optical element other surface is a convex shape is disposed 'one conical optical element you the H shape: projection display device I 0 Claims.
. 1 wherein the conical optical element using two, one the other surface of the eye P1 conical optical element on the one convex shape is a concave shape, two □ conical optical ^ Ryo - as a convex shape range 笫 1 arrangement the claims 0 paragraph ^ mounting of the projection type display device.
1 6. A light source, a light modulating means, an image light Ru generated by the modulating means and projecting means you projected to scan click over down, the projection light Ru is emitted Ri by projecting unit to the scan click rie down human morphism is allowed Ru reflected Mi La - and possess a scan click rie down, the central optical axis of the projection light in which the Ru is projected by the projection means to obliquely incident in pairs on the scan click rie down that it had contact to the projection type display device, the reflection Mi la - was constituted by a plurality, least for a projection type display also characterized that you have one or more reflective Mi La over a non-planar apparatus.
. 1 7 rear side or et angle nouns optical image that will be incident fine small flop rhythm A L'transmission Ru is condensed by Ri on the front side over the scan click Li - projection that have a down and have you to type display device, the transmissive scan click you characterized and this each flops rhythm apex angle of the micro-flop rhythm a L'over is set to less than 5 0 degrees 4 ◦ degree projection-type display device you have a rie down.
1 8. Of incidence and the light modulation means, a projection means you project the image light Ru generated by the modulation means into scan click rie down, the projection light Ru is emitted Ri by projecting unit to the scan click rie down a reflection Mi La chromatography that was, possess a scan click rie down, the a reflecting Mi La one scan click final reflection Mi La over which the rie down Ru was entering morphism is a said scan click rie down and have you a projection type display device coordinated S parallel, the central optical axis of the projected light that will be projected by the projection means against said scan click rie down angle of incidence thermal power "6 0 ° by Ri Univ flood elevation type display device shall be the feature and this that have a angle has come.
PCT/JP1992/000307 1991-03-15 1992-03-13 Projection type display device WO1992016871A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
JP3/51251 1991-03-15
JP5125191 1991-03-15
JP3/169646 1991-07-10
JP16964691 1991-07-10
JP18464991 1991-07-24
JP3/184649 1991-07-24
JP3/233395 1991-09-12
JP23339591 1991-09-12
JP23633691 1991-09-17
JP3/236336 1991-09-17
JP3/281500 1991-10-28
JP28150091 1991-10-28
JP4/35231 1992-02-21
JP3523192 1992-02-21

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/949,243 US5422691A (en) 1991-03-15 1991-03-13 Projection type displaying apparatus and illumination system
JP50641892A JP3218604B2 (en) 1991-03-15 1992-03-13 Projection display device

Publications (1)

Publication Number Publication Date
WO1992016871A1 true WO1992016871A1 (en) 1992-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1992/000307 WO1992016871A1 (en) 1991-03-15 1992-03-13 Projection type display device

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Country Link
JP (1) JP3218604B2 (en)
WO (1) WO1992016871A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676893A2 (en) * 1994-04-07 1995-10-11 Projectavision, Inc. Cabinet for portable rear-screen television projector
WO1996013943A1 (en) * 1994-11-01 1996-05-09 Raychem Corporation Hole eliminator for lamp with reflector
WO1996016351A1 (en) * 1994-11-23 1996-05-30 Minnesota Mining And Manufacturing Company Projector with multiple lamp light source
GB2298497A (en) * 1995-03-02 1996-09-04 Robin Christopher Colclough Asymmetric divergent projection system
US5659409A (en) * 1992-10-09 1997-08-19 Ag Technology Co., Ltd. Light source apparatus using a cone-like material and an applied apparatus thereof
EP0864919A2 (en) * 1997-02-18 1998-09-16 Victor Company Of Japan, Ltd. Apparatus, method image and storage medium for recording stereoscopic image
JP2007079054A (en) * 2005-09-13 2007-03-29 Canon Inc Optical system and image projecting apparatus
JP2009259582A (en) * 2008-04-16 2009-11-05 Casio Comput Co Ltd Light source device and projector equipped therewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007501446A (en) * 2003-05-13 2007-01-25 スクラム テクノロジーズ インコーポレイテッド Precision optical system for display panel

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Publication number Priority date Publication date Assignee Title
JPS51334A (en) * 1974-05-21 1976-01-06 Furitsutsu Bikutaa Haseruburat
JPS53147835U (en) * 1977-04-26 1978-11-21
JPS63120242U (en) * 1987-01-27 1988-08-03
JPH02236587A (en) * 1990-02-15 1990-09-19 Casio Comput Co Ltd Overhead projector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51334A (en) * 1974-05-21 1976-01-06 Furitsutsu Bikutaa Haseruburat
JPS53147835U (en) * 1977-04-26 1978-11-21
JPS63120242U (en) * 1987-01-27 1988-08-03
JPH02236587A (en) * 1990-02-15 1990-09-19 Casio Comput Co Ltd Overhead projector

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5659409A (en) * 1992-10-09 1997-08-19 Ag Technology Co., Ltd. Light source apparatus using a cone-like material and an applied apparatus thereof
EP0676893A3 (en) * 1994-04-07 1995-12-20 Projectavision Inc Cabinet for portable rear-screen television projector.
EP0676893A2 (en) * 1994-04-07 1995-10-11 Projectavision, Inc. Cabinet for portable rear-screen television projector
WO1996013943A1 (en) * 1994-11-01 1996-05-09 Raychem Corporation Hole eliminator for lamp with reflector
WO1996016351A1 (en) * 1994-11-23 1996-05-30 Minnesota Mining And Manufacturing Company Projector with multiple lamp light source
GB2298497A (en) * 1995-03-02 1996-09-04 Robin Christopher Colclough Asymmetric divergent projection system
GB2298497B (en) * 1995-03-02 1997-05-21 Robin Christopher Colclough Image display device
EP0864919A2 (en) * 1997-02-18 1998-09-16 Victor Company Of Japan, Ltd. Apparatus, method image and storage medium for recording stereoscopic image
EP0864919A3 (en) * 1997-02-18 1999-05-26 Victor Company Of Japan, Ltd. Apparatus, method image and storage medium for recording stereoscopic images
JP2007079054A (en) * 2005-09-13 2007-03-29 Canon Inc Optical system and image projecting apparatus
JP2009259582A (en) * 2008-04-16 2009-11-05 Casio Comput Co Ltd Light source device and projector equipped therewith

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