Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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New p~ge~ 1
a~pa~atu~ ~
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~he inven~lon relate~ ~o an appara~u~ accor~n~
: 5 to the prechara~terlslng ~la~e o~ Cl~lm la ~0~ the
purposes o thP lnYention, ~pparatuses a~e under~tood
: ~s mea~lng exclu~ively ~ppa~atuses in whlch a p1~ure
~: or it8 image can ~e seen. Pro~ectox~, ~u~h as, ~or
example, ~llm pro~ec~ors, which r~quire ~n external
19 ~creen are e~clude~.
~or the purpoRes of the lnvention, pic~u~e~
~re, fo~ examplet ~ran~parencie~, ~uch n~ 6lide~t
txansmltted-lish~. LCD pic~res or the llke; ~ln~le~
~olou~ or multl~olour ~r~ght/dark mask~; fluo~e~cent
lS ~creens, ~uch a6 ~r~nsill~mlnatable pro~ection ~reene,
; electrol~mine~cent ~reens, ~-eleris~on ~creen~ or the
. like. A tran~illuminatAble pro~ectlon ~creen whlch A8
~ far as pos~lble 1~ free ~f a~t~rglow 1~ a ~la8~ llk~
:~ ~hee~, ~or example ~ opal gl~8 ~hee~, whlch allows
the image to app~ar.
~he rot~a~le plcutre vlewlng part, refe~red to
~. belo~ ~lmply ns ~he viewlng par~, lncludes ~ll p~rtg
.. ~hlch are conne~ed ~o one ~nother, serve ~or all-round
pre~entation ~ ~he plcture ~Ind can ~e dr$~en, ~or
:~ ~S example by a motor.
~, For th~ purpose~ o~ the lnventio~, light-
~a~lec~ing par~ are mlrro~ ~8 well a~ pro~ectlon
. ~reen~, ~or ~x~mple in the orm of ~n ~nte~n~l ~creæn,
;. po3sl~1y also.r~lea~ed-ll~ht plc~ure~.
I~lu~ln~tln~ mean~ nders~oo~ a~ meanin~ the
~ ination o~ llgh~ ~our~e~, con~ve mlrro~ and
:; condenæer o~ colli~ator l~nse~ whic~ ls ~08
~d~anta~eous under the given condltion~ may ~l~o be
ar~n~ed externally, ox exa~ple in ~he form of a slide
pro~tor. Poæ~i~le llg~t sou~e~ are l~mps or
radiation ~ource~ whlch emlt li~ht or radia~ion Whlch
~an ~e con~exted ~nto ligh~, for example ~l~o ca~hode
~ay tube~, llght ~mit~ing dlode arran~ement~,
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electrolumine~cent plates or the like . A polnt-l ~ ke
llght ~ource ~e uncler~tood A9 meanlngl a liqht ~ource
hD.lrlng ~ ~m~ll lumlnous cen~e (e.g. an incande~cent
c:oll) OI~ hlgh luminous ~eslæ1ty ~e.g. a haloqen 7amp).
S Th~ defle~tion part or deflectlng llgh~ beam~
i~ underQtood as Ine~nlng thos~ opklcal comp~nen~ whlch
re~lect or ~frac - the lig~t ~am~ a~ lea~ on~e, . u~h
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New pA~e; 2
, ~c~r examp1e, mi~lror~, whl~h may al~o ~e l~alf-
~llvered; prlsm~; flbre-optical w~veguides; lense~ or
lens ~y~tem~, ln part~ lar ~; one of the ~bove-
5mentioned ~eflec~lon p~rt~.
;~ ~he srld con~ o~ an arrangement o~ pa~llel
l~mell~e. ~?0 88/~9~4C, the ~on~ent of ~hlch l~
~cln~ ~ clere1d ~ ein~ disclo~d in ~he context of the
pxe#ent in~ntion, d~crlbes lt~ d~lgn ~nd ~unctlon.
10Po~lble llght ~ource~ ~re lampQ or radi~q~ion
~ources which ~amlt llght or ra~iat~ on wh~ c}~ c~an be
convert~d lnto ~ight, ~or sxample a~o ca~hode r~y
tuh~ ht emittlrlg diode arrangement~,
` e~ect~olumlne~cent plate~ or the ~ ~ke .
15Plctu~e dlsplays for ~he presentation o~ ~ ~wo-
dlmenslona~ pl~ture over a vlewlng ~n~le of, fo~
exam1?le, 180 or 3~0 ~re lcnown, for example ~oln ~he
U~S. Patent~ 4,760,443, 3,976,837, 4~4~1~2~0 ~nd
- 3,3Z4,76Q, P~ Applicatlc)n WO ~/0954~ and ~ri~ish
20~a~ent ~,788, which are consideredl a~ b~ing dlsclos~d
ln ~he cont~xt of thi~ appll~atl.on.
~` Partl~ul~rly the ~1 rs~-mentioned U~ S . Patent
and ~h~ PC~ Appl~atlon descrlbe plcture ~i~play
~ tem~ whl~h ~unc~lon relativ~ly well in ~ome c~e~
2Sbut ~annot ~t b~ ed ~or all .requ~red ~pplic~tion~.
In n~o~t case~, the ligh~ sour~e i~ moun~d so that it
1~ 3ta~0nar~, ~9 ~ho~n, for example, ln Fi~. 3 to 5 ln
U.S. P~tent- 4,7~0,443, becau~e of the incr~a~ed llfe of
the ll~ht ~ou~ce an~ be~au e o~ the po~slble omls~:lon
30 ~of ~llp rin$~s or the llke. In 'c~le arran~ernent ~hown in
~lg. 2A, rotation of tlle 1;~1e~lon ~et ~105) ~hown
~hQre ~bout a ~rerti~al ~xi~ pa~ln~ throu~h ~t~ lm~e
a~a pre~ent~ certaln problem~ wlth centrlfu~al force,
power #upply~ B~nal ~upply~ et~. ~lect~onic ~otation
~5o ~he picture, as i~dlcated ln the d~cription,
pre~en~ problem~ o~ln~ to ~he pos~lble a~er~low
b~havlollr of ~h~ lum~ne~cen~ layer. However~ even m~re
trou]~le~oms 18 the a~ ngement of a len~ matrlx on the
, ~-`" 20~gOll
N~w p~çle: 2~
~yllndrical ~creen~ ~e~t~ have ~hown tha~ su~h an
rrangement le~d~ to very blurred lmages ~in~e
suE;erpo~ltion of lmages oc~ur~ ln th~ field of v~s~on
o~ an ob~erver.
5~he vaxl~nt ~o~n ln ~lg . â of U. S . Paten~
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4,760,443 has a static ligh~ source which throws the light
via an inclined mirror onto a transmitted-light picture ~206)
or a lamellar grid (15); since the latter, however, is
fastened to the outer cylinder wall of a rotatable cylinder,.
the observer may perceive considerable blurring effects which
render the picture unrecognisable, particularly at relatively
high rotary speeds.
FigO 14 of WO 88/095~6 shows the rotating part of a
360 picture display with a static light source underneath.
The rotating part is essentially composed of light-guiding
material and concentrates the light of the light source
behind the transmitted-light picture. This makes replacement
or changing of the transmitted-light pictures di~ficult.
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lS The picture display of U.S. Patent 3,976,837 is
based on the principle of the variant of Fig. 2A o~ U.S.
Patent 4l760,443 and, for the same reasons given above, can
be used only with reservations. Although the arrangement of
the picture display according to U.S. Patent 4,431,280
permits a stereoscopic view of a picture, it is very
i complicated owing to the very many individual moving and
rotating parts.
The different variants of U.S. Patent 3,324,760
have a static light source which, however, must have a
luminous intensity which is several times greater than that
required by, for example, the variant of Fig. 3 of U.S.
Patent ~,760,443, owing to a very narrow observation slot.
In addition, because the amount of light reflected out of the
drum is only small, the drum heats up to an inadmissible
extent.
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. In order to communicate a signal picture content, a
:, multiplicity of film material is necessary to ensure that a
continuously maintained picture appears. Furthermore, the
picture has to be rotated in order continuously to appear the
right way up to the observer. Several times the quantity of
. film material is required to communicate a single picture
;~ content. :
In the apparatus shown in Austrian Patent 275,910,
the rotationa1ly ~ymmetrio image of a rotating ~
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~o~y ~ shown a~ ~ three-dl~ensional phantom lmag~,
~hc opti~l pro~ec~ion ~y~e~ descr$bed contalns, a~ ~n
e~sentlal part, a ~ove inver~lng p~i~m, Whlch i~
; 5 rota~d at half tha ~ngul~r v~lo~l~y comp~ed wlth a
~otatable ro~or whlch ~arrle~ ~ pxo~ec~lon surace.
q?he rotatln~, pro~e~ted ~pllt picture con~nunl~e~ a
; ~hree-dimen~lon~l image o~ tho rotAting bod~, whl h
image can be vlewed from ~11 sld~. H~weve~, oniy
- 10 rota~loinally ~y~metrl~ ~odi~ c~n be di~playe~ in ~his
m~nner, but no~ exten~l~e plcture~, their ~ppeaxfln~e
ing coYere~ by a ~or~ of grey haze ~nd the ed~
contollrs appe~ln~ unn~turaïly ~trong. .
~t 1~ ~he ob~e~t of thQ inventi~n to a~rold o~
1$ at least to re~uce ~11 the di~advantages descrlbed and
~o provide the pos31bllity of ~ ~pre~er~ ound~ -
pl~ture pre~entation whl~h lS mechanl~ally ~mpler and
hence les~ su~ceptlble to faults and in whl~h the pa~h
of the llght beam~ can ~e varied w~thln wid~ llmlts
~0 dep~n~lng on ~he particular requl~ement~ an~ dl~fer~nt
~ppllaation~, ~n par~icula~ tendQd that
b~tt~r
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. . . ll~ht utlll~atlon ~nd more ~peciPlc plcture
- illumlnation Are aahle~re~ wlth ~ tatlonary 1 ls~ht
: ~ource. All llght should be }:rou6~ht l~ehlnd the plcture
or to the ob~&nter ln order ~o avold ~ddi~ion~
: 5 ~e~le~tion loss~s ~t the ~onS of the plc~ure. It
~hould be po~lble to vary the luln~no~l~ intetl~lty l~r
~lmply ~han~in~ the llgh~ ~ouxce wlthou~ h~ving ~o
~1'cer the r~m~lnl~lg componen. ~. De~plte all ~ he
me~hanical a~en~ly, ln pA~lcular tnountin~ o~ the
ro~Atable plcture-vlewlrlg pa~t, ~hould be po~s~ble wlt~
relatlvely ~mall ~earlng diameter~
Su~pr~lngly, ~hl~ c~n b0 achleved
~ati~fac~orily :Cor the first time - for d~e~ent
variant~ y Q com~lnatlon of th~ featurQe de~crlbed
~, 15 In clal~ 1. In contra~t ~o 'che known d~sl~n, thiB new
cl~gign i~ ully ~unctlonal , do~aR not have the ~ta~ed
di3ad-~an~ag~ ~nd rur~h4rmore perfQrms the o~her t~s~
The alte~nAt~te~ descrl~ed in ~lain~ 1 ~rl~e
~rom the following rel~lonshlp: ~ha interactIon o~ ~n
2û approxlma~ely polnt~ ce ll~ht laou~ae ~ith the ~!1Xi8 oÇ
ro'6;atlon or ~he lmag~-v~e~lng p~xt ~nd wlth ~ r~lector
par'c which reflect~ ~he llght ~rriving from the reglon
of the ~x~ o~ xo~tion l~ac~c through ~ pl~ne whi~h li
ln ~he ~xi5 o~ rot~tion~ the g~d al~30 Ibelny p~rallel
to thls plana, 1~ ~lecisiv~ ~o~ the lnventlon. ~I!hi~
lnteractlon aan be a~hleved, ac~ordlng t~ ~he
.; in~rention, by an i~d~ptatio~ o~ ~he llght source ~or
obtalnlng ~ r~arrow bund~e ~ y~ ha~ln~ an optLc~l
. ~ axl~ wh~Gh i~ po~lt~,olle~ ln the axi~ of rot~tio~, or ~y
3U ~rr~n~in~ the liqht ~ou~ elf ~n th~ ~lhxl~ o~
ro~ lon, ln~lcle ~he ~ot~t~ble image-Ylewln~ pa~t
i lt~lf.
In the flr~t cas~3~ it t ~ posslble to u~e
tr~n~mi~ted~ ht pictuxe~ which ~re ~o be arranged
35 el~her ln th~ ~eglLon of the narrow llght ~undle or
clIrectly ln ~he grid, ~r ~o provlc~e refl~ted~ 3h~
pi~uI~e-~l whlch 8~e n~ounted d~ rec~1y on t}l~ llght~
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reflecting part - a distance away from the grid but directed
toward the latter. If transmitted-light pictures (slides)
are provided in the region of the narrow light bundle, these
~ 5 can be viewed themselves there or can be projected via a
- subsequent optical system onto a projection screen which then
occupies the position of the transmitted-light picture in the
grid or of the reflector-light picture in the reflector part,
as is evident from claims 2 and 3. The features of claim 2
also include the possibility of mounting a diffusion screen
between the transmitted-light picture and the light source,
said screen being useful when the transmitted-light picture
is mounted directly in the grid. In such a case~ the
diffusion screen serves only for better light distribution, -
as, for example, the opaque back of a light-box transparency.
In the second case, it is possible to arrange
transmitted-light pictures directly in the grid or to provide
reflected-light pictures as in the first case.
Advantageous further embodiments and different
variants of the invention are described in the defining
clauses o~ the further subclaims.
The possibility of being ab]Le to view the same
` picture or its image (either real or virtual) simultaneously
from any number of directions, including opposite ones, with
th~ aid of an apparatus which has no external projection
scxeen is ~ased, as already described above, on the principle
that this picture or its image is rokated at high rotary
speed - for example at more than 2400 revolutions per minute
- about an axis, a lamellar grid being arranged in the axis
of rotation. This grid also rotates, synchronously with the
picture or its image, about this axis of rotation and thus ~ ;
permits the picture ...... only in a defined position with
respect to the observer. Because of the lamellae and the
rear wall
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~o~erlng, all o~her dlxe~iorls are darkened. .~he
~unctioning of sucil a l~mell~r ~rld i8 ~e~rlbed ln US-
A-4,760,443, the conten~ of whlch is con~lder~d D~9
bein~ dl~closed ln khe ~nsext o~ thls ~e~cription.
, ~t l~ thus po3slble ~o allow the plctu~ lt~el~
to ro~ o ~chie~e ro~at~on of ~h~ plct~lre vi~
optical t:omponent~ or to ~llow ~he imag~ ~ real or
~ix~ual ) to xc~t~t9 .
For ~he ~ake of cl~rlty, ~he lndlvl~u~l flgur~s
- lO will ln~ti~lly be descrlbad b~low fxom ~he poln~ of
~rlew of the~e overall co~non ~ea~ur~s; ~-he ~ e~en~
em~odiments will th~n be descrlb~d for aa~h lndi~ldual
fi~l~re~ Part~ will bo mentioned wlthou~ ~n lndex where
Shelr i~entlcal natu~e or thelr iden~lcal ~Eun~tion l~
impoxtan~7 the$r 1 ndices will be mentloned when it is
~ntende~ to re~ex to ~ ~pe~1 ic embodiment o~ unctlon~
~he path of some selected li~h~ beams is approxlm~ted
Jy arro~ lO.
In Fig. 1 to 6, a transm te~ h~ pic~cur~
; ~0 or a reflected-llght plcture ~4 is rot~ted ~bout th~
axls of ro~ation 56. In Flg,. l, 2, ~a and 6, th~
pl~ture l o~ 14 ltself is; t~ansillu~i~ated or
lllumlnated and ~he plctuxe p~eejente~ l~ vis~bl~ in ~ts
nA ural ~ize. In Flg. 3~ plcture 14 i9 lilc~wise
:' 25 r~ognlsAble ln lt~ na~ural ~.ze~ ~t 1~ 1~ not tha
plcture its~l~ t~a~ 19 p~e~ente~ to ~h~ ob~erver ~ut
:! ~he i~a~a vla a ml~ror 4. In Fi~. 4 and 5, wh~h can
;` be mor~ clearly under~too~ ~rom the de~crlptlon o~ Fi~.
9 ~n~ lO, ~ t~ansmltte~-light pl~ture l l~ rot~ted.
~he ob~e~vsr ~e~ the enl~ged i~age. ~hUc~ 1~ the
pi~ure l or 14 ~lone ~8 ~ota~ed in the ca e~ ~hown ~n
Fig. 1, 2, 2a and 6, ~he lmage 1~ addl~ionally rot ted
In the example~ o~ Flg. 3 to S.
~ecau~e o 1~8 lamellae, the ~rld 5, whlch l~
arranged be~ween the pl~ture or lmage ~n~ the obs~er,
causes th~ plctur~ or th~ Ima~e to ~e v~lble ~o ~he
obs~rver only in the vlewing d~rection a~ rlght angle~
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to ~he plane of the picture o~ o~ ~he lmage. ~o~ thi~
pur~o~, lt rotate~ ~ynchronou~ly ~lth the plc~ure
ahout ~he axi~ o rotatio~ 56, the ax~ o~ ~o~a~n 5~
pA~slng throu~h th~ "plane~ w~ich 1~ ~orm~d ~y the ~ld
S , ~d i8 app~oxima~ely desl~nated ~9 a plane. In Fig. l,
~, 2a and 6 ~ 'I;he ~lX~8 0 ro~ation 5~ ~hu~ lles in ~h~
"plane"; ln Fi~. 3, ~ch~ ~rid 5c (dashe~l line~ m~y
mounked el~he~ pax~llel to the pictur~ 14c or ~not
~hown) at ri~ht ~le~ to ~t, corre~pond1ns~ ~o ~ig. l,
10 2, 2a ~n~ 6. In t~e formar ~a~e, ~he ~ri~ "pl~ne" 1~
e.~ righ~ angle~ ~o t~e axl~ of rot~tion ~c, I.e. ~he
~ald axl~ pa~es thxou~h ~he said plane, And the
qa~kenlng ef~e::t for ~he observer is effe~te~
ref lection at the mirxor 4~ . When the ~r~ d 5 i~
15 ~r~an~ed at xigh~ an~les ~co this, the li~ht ~e~ms pa~
t lea~c twice thro~s~h lt~ with the re~Ul t tha~ th~
. lumlnou~ in~en~lty of the plctllre 14c ~nd hence al80
the lumlnance of the image pxesented to the ob~erve~
are r~duced.
~0 Fi~. 1, 2, 2a, 3 and 6 show the viewing part
,~ 120, whl~h Is n~ounted, ~o tnat ~t ~an rotate ~bo~lt ~xl~
. 55, ln a housirlg 57 ( not shewn ln ~ig . 3 ) . ~he
~a~eplat~ l ~upports the grld ~nd the pictur~ 1 or 14
(Fi~. 1, 2, aa and 6 po~ ly ~lso Flg. ~ e ~ove);
orl~ice8 22 are pro~ded ~or holding optical component~
or for permit~lng ths p~s~age of light ~o lllumir~e
the pictura 1 ~ 14 ~F.~g. l, ~, ~a~ ~ and fi) . Ml~rors
4 ~ox lllumlnating the pl~tuxe 1 ~Flg. 1, 2a and 6) o~
~o~ p~oduçing an image of th3 picture 14 (Fig. 3) ~re
30 provld~d in ~h~ viewln~ part; ln ~'ne variant ~ho~n ~n
Fl~ uch a m~rror can be ~i~pen~ed s~ ~h . ~he
vlewlng part 120 may he $n the ~oxm of ~ clo ed tube
which ~arrie6 a r~flected-light plcture 14b or a mlrror
4~ or .4t ~ig. 2, 2tl ox 6) on part o~ lts lnn~r wall,
35 while ~he p~ whlch ~n be turned toward~ the ob~e~e~
mU~t b~ ~ransparent~ In order to ~ve ~el~h~, the
vlewln~ pa~t 120 ~an, however, al~o be r~rlc~ed ~o
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only the paxtlcular combinatlon o~ ~he followlng
; ro~a~lng parts: ~asepla~ 7, ~ri~ 5, ~irror 4 and
pi~ure 1 or 14. ~he ~ylln~rlcal housing S7 is
; tran~paren~ in ~he ~8~10n ~ l coor~lnated wi~h the
, viewlng pa~t 120, 80 that ~n obser~e~ has ~ free ~lew
: of ~ho ~ota~able ~lewing part 120 and ~he pre~en~d
p~ture from all v~ewlng di~ectlons right ~roun~ the
ho~lng 57.
In the ~mbodlment~ ~hown ln Fig. 7 ~o 15,
sota~lon of the plctur~ ls effec~-ed via op~ca~
~omponents, and th~ picture lt~el~ re~ain~ st~tionary.
~he ~asic principle 15 illustrat~d ~n Flg. 7. ~
rot~in~ pri~m 2~ whlch ls p~efer~bly ln ~he form of a
Dove lnvortinq pri~m and can be ro~ted, a~ indicated
by arrow 11, about an axls pa~allel to its ba~e, ~g
prov1ded for ~-his purpos~. During such a rotat~on, ~hc
- tran~mitted~ ht picture 1 1~ re~lsc~ed and i~-s l~age
~ppears ~ot~e~ thls occur~ing at twl~e the rotatlonAl
equency. Tha rotated lm~ge, which i~ enlarged ln
: 20 ~ome cases, 1~ presented to the observer vla l~n~
: ~ystem 8, or oth~r ~ able, op~l~al components, nfter
pa~a~e through ~ d ~. Since the grld 5 m~t ro~a~e
~ynchronou~ly wlth the vl~lble lma~e, in thesa ~ase~
where ~ Dove ln~exting prlsm o~ a ~omponen~-
~5 ~o~esponding to 1~ ~ p~esen1t tt ls necessary ~o
ensure ~hat the rotary ~paed o~ the ~rid 5 - and he~ce
~ha~ of ~h~ vlewing pArt 120 - ls ~xac~ly twlce a~ hi~h
aq th~ o~ the Dove lnver~in~ pri~m 2, unle~ ~pecl~l
e~f~ct~ are to be achieYed by means of di~ferenk
rotationa1 con~ltions.
In Flg. 7, t~le ax~ 0~ rotat~on 12~ of the
Do~e prlsm 2f and the ~xls oP ro atlon 5~f o~ the
vlewing par~ ~20f are not ld~ntlc~l; the pic~ure 1~ ls
rota~ed by means of the Dove p~i~m ~, produced ~ en
lma~e ~la an ~nver~lng p~lsm 3~ and a len ~y~tem ~f
~ h-dot line) on th~ ba~eplate 7f in ~he for~ of ~
pro~ectlon screen~ p~e~en~ed ~la a ~i~xor ~f through
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- the lamellar ~rl~ 5f.
F~ hows ~he po~lblli~y ~f xepla~lng ~he
~ove pr~ ~m by t}~e ~om~lnatlon o~ ~u~a~ly ~r~nged
mlrro~ 1. Rotation 0~ thi~ mlr~or conlPlnatlon ~k~3
5, pla~e ~l~out th~ aXi~ g, Whlch may, ~U~ need no~,
~olncide wlth the ~xls of ~o~a~lorl 56 of the view~n~
; ~ part 120 .
In Fig. g ~n~ 10, ~ ml~ror 25 is pro~ided
lnstead o~ the invertln~ prlsm 3. 'rhe ro~atlng ~mage~
~`. 10 of ~he pict~re lh on p . s~age of the beams ~hrough the
~o~e p~i3m 2h c:an ~e ~3een in F~7. 9 ~rom the two bea~ns
~: 123 aln~ 124. q!ha~: po~ ion of the l~ove prlsm 2h' whlch
;! il; rc~tated ~hrough 901~ lncllc~ted ~y ~ dash-~ot line.
:' ~ig. 10 ~hows a sectlon ~chro-lgh the3e two ro~lon~l
po~ltlon5 o the p~lsm ~h ~ncl 2h~ ~out the zlxlP~ of
~otat~on 122h.
F~g. ll to 15 show arra.n~ement~ in whiGh the
`^ axis of rotatlon 1~2 o~ the Do~r& prlsm 2 colncldes with
;1 the axis of rota~ion 56 of the ~rlewlng par~ ~20 and
hence al~o o~ ~he grld 5; plcture l is elther At rlgh~
~ngles ~o thi~ axl~ ~Fig. 1~) ox p~allel to it And i~
`.! ~eflec~ed vl~ a mlrror as 0~ an inverting p~i~m 3 ~nto
the plane at rl~ht angle~ to the ~xl~ of rotation 122
or 5~ (Fl~. 11, 12 and 13~. Pi~ure 1 ls produced ~
29 an enla~ged lm~e by opt~c~l componen~s, excep~ in ~h~
~arlan~ ~hown ~ Fi~. 14.
In F~g. ll, this l~ e~ec~ecl vLa two m~rrorff~
.~ p~efe~ly a ~ombln~tion o a pl~ne n~1 xror 2Sl ~ ~nd a
con~ex mlrxor 4i ~hich may ~e approximately clesl~nated
30 as such and who~ ~pecial curva~ure dete~mined
~mplrically o~ hy ~:alcul~tion ~ e~ an undi~tor'ced,
enlarged lma~e of ~he plçture li on tlle
~ransilluminatable projection screen Si. ~e~e, the
~sepl~e 7i has ~n orl~ia~ 221 ln the form o~ ~ ~ector
3$ o~ a clrcle~ In rlg. 15 to~, mi~ro~ 2Sn ~nd 4n ~e
al8o pro~ded, ~htch enlarge the lmag~ ln rotated b~
Dove prlsm 2n ~nd pxo~uce the ln~ag~ on a pro~ectlon
i
,
,
:~ . ' ' ' ' .', ' , ' , .' ~ ',, ,, . , ,, ' ' ~ ,, ' ' ' '. '
.
~c~een Gn whic~h 18 li~ewLse ~r~n~llluminat~
he arrangen~ant accordlng to F1~ , thl~
19 ~eplaced by e. ~ype o~ lnvert~n~ pr~sm 3~, the llgh
em0~gence sur~ace 24~ of whi~::h Inu~ b~ ~uita~y foLme~
5 , ~ it 18 ~herefo~e indlcated by ~ ~a~h-~ot li~le) to
~roduce a sharp, enlarged imag~ of tbe pi~tura 1~ on
the ~cre~n B~. A lens ~y~t~m will be provlded ~or ~h~3
purpo~e, the optica~ dlmenslon~ o~ whlch ~hould be
~dapted to the ~peci~ic ~lmenalorl~ of ~he apparatus.
Instead of the pro~ection ~creen ~ ls nlso
. po~sible to pxo~rlde a mlrxor 4~, whi~h, howevex, w~ ll
then pre~erAhly bo cur~e~, and adapted to the lens
~y~ten~ deslgnated conceE~ually by the light-Pm~rgence
su~face 24i of the prism (thls embod~ment is not shown
iTI Fig, 12) .
Fig. 13 ~hows ~ ~ariant ln which ~ ~sns ~ystem
;~ 8k lsi3 a:c~as~ged do~ stream of ~he Do~e prl~m 27c a~d
- which pre~ents to the 0~3se~ver the enlarged, ~otated
lmago o the p~ cture ~rom a pro~ection apparatu~ SOk,
2~ from a 'cransilluminatable pro~e~tlon ~cre~n 6k vla ~
mlrror 4k and th~ grld S~c.
~ig. 14 ~hows an a~ran~ment ln whlch only one
half oP the imag~ 1~ pr~3en~ed s~i~ each Of two mlrror~
4m ~nd 4m~; as a re~ult o~ the ~otAtion ~bout the ~xi
~5 of ~otat~ on ~6m, th~ tot~l plcture 19 ~een. I~
~hown here, ~he viewln~ par~ 120m is no~ sux~otlncled by
~ hou~ing tube, th~ t~ansp~ent ~e~lon3 91k Pnd 91k~
each only ~xtend o~rer no more thiln hal~ the later~l
~ur~ace o~ th~ v~ewlng part 120nl ~nd ~r~ o~f~et with
re~pect to ons ~nother. This ~xrang~ment is
dl~tingul~h~d by a ma~ ~ls~ribution whlch ls ext~em~ly
advantag~ous for the ro~ation; ~or other imaglng
~rran~emen~, this ~olution is not ~ually advanta~eou~
slnce it 1Y ne~esi~ry to en~ure ldentlc2ll ~m~lng
conditlon~ for the ~artial pic~re~
Fl~. 16, 17 and 18 show po~lbllltiss for
R~an~enlen~i~ in whlch the image l~i rotated bll~ the
:.:
~: .
2 0 ~
`~ 10 '
picture r~m~ins ~ tlonary.
Rot~tion of ~he lm~ge Alone, ~lth~r vl~lbl~ ns
~lle ~ehl lmage on a liqht-r~flecting pa~ in the ~orn
of ~ pro~ect~ on ~ en ~ or vlr~cuAlly via a mlr~or
S , (light-re~lec:~lng part), 13 of in~eres~ only for ~re~r
~peci~ a~0~v If ~ picture 1 ls to be presented ln
~h~ ~ame manner ln ~11 vlewing direction~ rlgh~ round
the ~lewins;l pa~t 120, ~he piGtUre 1 mus'c then comprlse
a ro~tionally ~ymmetric xep~esen~tion. Howe~rer, i~
is of course al~o pos~lbllia that ln~e~s~ing e~ecss a~e
de~ired pre~l~ely ~ a result o~ pxe~en~atlon o~ th~
~ture 1 l~y rotation ~g a ~unctlon of the vl~wlng
d~lrec~-lon.
The statlonary plcture 1 is proc~uced ~s ~n
i~nage on A pro~ectlon ~cre~n 6 via ~ul~a~le defle~tion
. p~rts ~ and l~ns ~y~tems 8, or re~lected vl~ ~he mlrror
. Fig. 16 shows only the vlewin5~ par~- 120p; the prlsm
3p wlth i~ speCially des~grled light-emer~6~n~e sur~ e
24p e~sentlally cor~e~pond~ to the prlsm 3~1 ~hown in
Fig. 12 ~nd described above; the ~ame zlpplie~ ~o 'che
em~otlment of ps~o~ectlon screen 5p of mixror 4p.
Fiq. 17 and 18 show analogou~ arrangement~,
~xcept in thi~ c~se the plcture ;l ~ t right angle~ or
parallel to the axis of ro~at~on 56. I~ the
~i transmlt~e~-light pic~l,r~ ~q ~ho~wn in Flg. 11 ls ln thefo~m of a t~an~mltted~ ht (multlcolour) LC~
: possible ~o control ~hl~ via con~rol lines 71q ~y mean~
~f a con~rol p~t 70q. The transmitted~ ht ~CD
displ~ys ~ny p~ogramm~ble p~tllre~, ~lmll~x to ~ ~lide
b~lt conv~ted lnto dlgltal ~lgnal3, the sald plctures
be~n~ ~apable of ~elng transilll~mln~e~ llke
conventional transmlt~ed-llght plctuxe~ 1. The
el~ctroni~3 of the pi~ture control 70~ also mak~ it
pos~lble to ro~a~e t~e LCD plctu~e electronic~lly, 80
3~ that no mecha~lcal apparatu~e~ ~re re~ x~d Ior
rotatlon of the plctur~ ~q. ~he I,CD plctu~e rllust not
.. . . . . ~ ~ ......................... , ~ . . -
, .. ,.. .. . . .- .
2 0 ~ ., O :~ 1
: 11
rotated a~ntl~uo~ly bu~ in a 6~epw~)~e trunc~ted
form, ~or ~xamp~e from 5 ~o 5, ynch~onou~l~ wlth the
:: ro~ peed o~ the ml~or 4d. Any trou~l3~0me
A~te~low 2~fec~s nlu~t be ~olded in o~er to ~rold
S , ad~e~e ef fe~ on ~h~ de~ln~tion o~ the lm~e . ~e
va~iant ~hown in ~ig. 17 $9 more or les~
"compl$mentary par'cner" o~ th~s cont~ol rran~Qm~n~,
~lnce l~o~h the pl~ure ~nd 1~ 1mA~e ~re r~tRted.
~he ~ nv~ntlve cle~ectlon p~xt e~enti~ ~or
10 pr~er~ation o the plcture oYel~ a ~olid a~gïe of 360
may take a very wide rar~ge o~ ~orms, a~ ls e~tldent ~om
the ~l~ove de~crlpt~on of the indl~ldual f1qure~. ~hu~
~i ln the a~rangement~ corresponding to Fi~. 1, 2a, 1~, 17
and la, it ~ s ln the form of ~ deflectlon prl~ 3
1~ h~vln~ ~peclally ~h~ped light-emergence sur~aces 24; in
the ~rrangement of ~ig. 2, a bundle of ~ibre-optical
wave~uide~ 3b i~ provi :led in~tead o this . In ~lg . 7
and g-15, the deflection part ~s ln the 40rln of ~ l)o~re
1n~rertlng pri~m 2, ~ f nece~saxy ~upplemented by
addltlonal optical def1ect10n par~s, such ~ a lens
~y~tem 8~ ~nd an inve~lng prlsm 3~ ~F1g. 7), a mirror
25~, 25i or 25n tFlg. lO, 11 an~l 15, re~pec~ely), an
-, lnverting pri~m 3~ havlng a speclally ~ormed 1~ht-
emergence ~ur~ace ~4~ ~ Fig . 12 ) or a lsn~ sys'cem 8k
~;` 25 ~ig. 13~. Fig. 8 ~how~ the pos~sibility of havlnS~ tha
deflectio~ pa~ in ~he for~ o~ an angular ~l~ror
~ranqemen~ 130, whi~h has optlc~l propertie~ ~n~logous
to ~ho~ o~ the DQva pr~m 2.
The overa~l desCript10n o~ ~he Figu~e~ i~rom the
po~nt of view of identlcal functlonlng ln resp~t of
the op~lcal pre~entatlon of the lmage wlll ~e comple~ed
helo~ by the de~erlptlon of differing ~nd ldentlcal
pos lble embodime~t~ and detail~.
.~he illumlnat~ng mean~ ~on~l~t~, in A known
35 ~nanner, o~ indlvidu~l conlponen~ which ~e used ln
: di~exent co~blna~ions, depending on th~ desired or
pr~ e~ ~nc~on or d~men ~ons. Llght so~rce 32,
,
, ~ .. .. ~ - .. ~
~` 2 ~
. 1~
~lliptlcal, par~bolic or hypsrboltc concave m~rror 33,
if n~c~sary i~ the ~orm o~ a met~l oxide vaporlso~
rn$r~or, possible aspherlcal con~en~or len~e~ ~n~ 1~
ne~eg~ary also colllmator lens~ are com~in~ble. With
;~ 5 , the a~d of a~pherlc~l len~e~, the emltted llgh~ x i~
optim~lly colle~ted ~nd r~ained ~ox~ the llluminatlon
p~oce ~. The as~hexlcal lens ~lape permlt~ ~hort ~ocal
dl~n~es and ~mall apparatu~s lengths ~an t~ere~o~e be
real$sed. It can al50 ~ ed to tran~mit parall~ï
light bundle~ wlthout addi~lonal int~rmadla~e lma~e~.
When ~hey are of a ~u~ table ~hap~, a~phexlcal lense~
~l~o mak~ it po~slb~e to pro~uce an lma~e o~ the l~mp
., ~ilament of the 1151h~ ~ource 32 wlthout ~pheric2~1
a~erra~ct on ~nd permit un~ form and brl~ht pro~cted
~ma~a~.
In most fl~ure~, the llluminatlng mean~ are
~hown purely sch~m~tlc:ally by a llght ~ource 32 ~nd a
concave m~rror 33; for the 6ake ~f cl~rlty, the
a~pherical len~os have not been shown; ~hese also could
h~ve ~een omltted in the cases 6hown in F~ g. 2 and 6,
~ln~e directional t~an~ tmln~lon o~ a plctu~e 1 1~
not lmpbr~ant ~he~e~ In Flg. ~;, the li~ht ~ou~ce 32e
of the illumlnat~ng m~ ns 18 in~erted lnto kh~ hou~lng
57e from above ~nd i~ partlally surro-~nded by a conc~ve
mir~o~ 3~e whi~h is ~tened to the baseplate 7e, ~hich
lr~ this c~se ls the upper co~rer plat~ o~ ~he viewln~
part 1~0c. Sult~bl~ n~ounted mlr~ors 4e And 4e' p~ovlde
unl~orm tr~nslllumination o~ the pic~ure le. In ~lg.
2, the llgh~ ~ourcs 32b i~ once a~ain ~u~oun~ed by A
~0 conca~re ml~rcsr 33b, th~3 ~unction of whi~h l~ suppo~ted
by ~ ~lvexed ~ollectin~ funnel~ 80b. ~he
Ll~umlnating means ~IOw~ in Fig . 3 es~ent~ ally
corresponds ~o hat de~cribed abova ~ut, wh~n a
~ransm~t~ed-light picture 14~ i~ u~ed, the ~pe~lal
en~o~lment also o~fer~ th~ po~sibil~ty o~ ec~cin~
lllulnlnation ~xom a~ove ~y mean~ ~f an ex~nal llght
gource (table lamp, celllng llght., sunll~ht, etc. )
.. . .
~=.. ~........... . . . . . .
.
2 ~
13
in~epe~ent o~ the hou~ing ~no~ ~hown) sux~s~undln~ th~
.~ vl~wlng pa~'c 120~
In Fig. 13, the lllum~ rlatin~ mean~ is located
ln the ~llde pro~ec~lon appar~tu~ 5Qk which de~l~ct~
, ~he lma~ beams via an o~ifice, provlded ~or tpl~s
pu~po~e, ln th~ ba~e of ~he hou~ing 57X on~o a
~lact~ng ~nlr~or 25k.
~he light ~eam emitted by the lllumln~tins
means ~an ~e de~lec~ed b~ exy wid~ xan~ o~ op~ic~l
compo~en~ ~nd combt nations ~horeof . ~ig . 1 ~nd ~A
~how the qolutions which re rel~tad ~o Fiq. 12, lG, ~7
and 18 bu~c where th~ light-emergen~e ~ur~ace 24A 0~ 2~t
o~ the deflec~cin~ prlsm 3a and ~, re~pe~ti~ely, need
n~t nlee~ op~lcal lmAglng condltion~ but mer~l~ h~ to
1~ de~lec~ th~ h~ ron~ the lllumlnating me ns ~s
~lfoxmly ~s po ~lble to the l~ght-refle~ting par~ 4a
~; or 4t. Fig. ~ shows, purely ~chematlc~lly,
de le~ting part which throws the llght beam~ unlformly
on~to the plctu~e 14b. A bund~e ~f optlc~l wavegulde~
~0 which is held~n the orific~ ~2b of the ba~eplate 7J~
and ~otated with the ~3ald ~aseplate, would be
! ad~anta~eous for thi~ pu~po~e.
To ensure a ~h~rp ima~e o~ the plcture l,
:` f~cuslng means 9 should be p~ovided on ~he ~a~tous len~
8y tems 8 ~or on the len~ ~s~em to be coordinated with
~he light-emerg~nce ~u~fa~e 24~ or 24q an~ 24r of Fi~.
12 OI~ 17 and 1~), as lnclicated by a dash-do~ llne ln,
~or e~sample, Fiq . 7 ~ 9 f ) .
: . : Support ~hee~s ~5, wh~:h n~ay ~l~o pe~mlt
irlse~lon and holdlng of A plc~ure! 1 ln ~ron~ o~ the
çfrld 5 ~ehlnd ~hl~ when viewed ~rom ~he posltlon of
~he ob~Yr~rex), are advanta~æo~s for ~upportln~, ln
parti~ular, a ~lexlbl~ gr~d 5 lnside the ylewin~ par~-
1~0 ~Fl51. 2a, ~ , 17 ~nd 18). Ftg. 2 ~hows, ~o~
3~ examplel ~ ~xid 5h whlch as ~u~h 1~ rlgid and ~or whlch
;. no suppor~ sheet~ need be p~ovlded.
In Fi~ he g~id 5a i~ ~u~ppo~ed, ~t ~he
.
. :, .. . . . :, . . ' . , . ~ , : . . . ...
2~ 01
~ew p~ge: 14
~lde ~cln~ ~ay ~rom ~he o~erve~, on a tr~næmltted-
llght plcture la ln the ~or~ of ~ tran~mlt~ed-llght
~C~, Mnd ln Fi~. 11 and 15 on a ~ro~ect~on ~reen 61
~n~ 6n, re~pect~v~, whlch 1~, ~or ~xample, ~n ~he
$orm o~ an op~l g~a~ ~heet. Fl~. 6 show~ thAt ~ W
11~e~ ~e may be mounted ~tween th~ ~rld ~e ~nd a
~upport ~he~ 65~, ~he ~aid fll~ex ~eln~ provided ~o~
pxotect~ng ~he ob~erve~, part~ularly when arc
di~cha~ge lamp~ ~re used a~ the lg~ht soure 32e.
~he ba~eplate 7 o~ the vlewing part 120 1B
dr~van ~y a drum drlve 62, ln mo~t c~ea by an el~c~ric
~otor. Regarding the very wlde rang~ o po~ble drive
varl~t~0 ~ome Or ~hlch ere not de~rlbed in partic~lar
ln thi~ appli~atlon, refer~nce may ~e made ~o EP-A-
035794~, ~he content of whiah is considered ~s ~ein~
di~lo~ed ln the contex~ o~ ~hl~ appllca~o~. ~he
~aseplate 7 18 ~he~ePo~e ~lways ln~lrec~l~ or dlrectly
rotatably mounted - ~or example vla ~ coupllng ~lange
~0 - in a dru~ bearing 54, ~8 ~ho~n ln ~lg. 1, a~ 2a,
Ç, 12, 13, 15, 17 ~nd 18. ~he drum bearlng 64 is held
by a drum holder ~3, wh$ah 1~ rl.gidly connec~ed ~o th~
hous~ng or to the ~ouslng tube 57. ~h~ rc,tD.tln~ paxt
m~y havs, in 1~ upper ~e~ion, a ~ounter-be~rlng 64h
~5 (Flg. 15). How~ve~, thi~ i~ not es~entlal 1~ ~he
rot~tin~ pa~t 1~ optlmall~ ~alanced. On the othe~
hand, the ~ounter-b~a~ing may ~l~o be arrAnged a
~econd bear~n~ - opt~onally in ~he fox~ o ~ewel
bearin~ 105 - for example on an e~nded ~earlng
~ourn~ low ~he ba3~pl~te 7a (Fl~ ). In ~n
or1fiae ln a d~um ~old~ ~3 ~l~ed to the hou~lng, a
couplin~ flange 60, whl~h i~ positively conn~t~d to
the gear ~heel 61 ~f the d~m ~r~ ro~tabl~
~ount6d Yia a flrum ~e~rlng ~4.
3~ ~hi~ drLve p~lnc~ple 1~ ~hown in Flg. 1~ ~ 2A~
12~ 15, 1~ and 18. In Fig. 2a, ~he mo~ox i~ rota~ed
throu~h 90, with ~ ho~iæont~l axi~ o~ ~o~tlon. H~e,
~he d~$~e wheel 3~ drive~ the ~1ewlng part 120t via
~ouplin~ ~urf~ce 3~ provlded on khe underneath o~
~eplAte 7~.
'In the v~iant ~hown in Flsl. ~, ln whlch l:h~
llght ~our~e 32e i9 moun~ed ln~ide the v~awln~ pa~t
1~0~ ~ut in ~ ~tatic~ tubular lamp holder ~6e, the drum
5 , boarlng 6~ i~ suppor~ed by thl ~ lamp hold~r l~e . ~rhe
~a~eplat~ 7e i~ ~hu~ d~iven via ~hl~ dxum l~axlng 64e~
~hs viewlng par~ ~Oe iR connec~ed, ~ 8 ~id~ f~lng
the base ~ cs hous~ng 57e, to ~he drlv~ ~h~ft 5Se o~
~he druln drlve 62e via ~ coupllng 46~. In th~
~rranSIement, ~he douk~le power ~upp~y line, whlch i~ to
e provlded on -he one hand ~rom below - 72e - fo~ the
. motor and on ~he other hand ~rom aboYe - 72e' - ~or ~helamp hol~0r ~6e, m~y prove to b~ dl~aqvant~eou~
Ei~her ~he ~ota~.~ ng p~ism 2 can be drlven by
lt~ own pr~sm dr~ve 29 ~Flg. 10, 12 and 13) or ro~atlng
pri~m 2 ~nd ~lewing part 120 can be driven together vi~
a frlctional or po~itlve t~ansmlR~lon s~ear ~Fig. 15~.
~he rotatln~ prlsm a 13 held ln a pxlsm hold~r
~ ~6, the outer ~lrface of whlch ls p~erahly in th~
~orm o the lateral ~urfacc of ~ cyllnd~r. ~he pri~m
holdex 26 and henc~ the rotatins~ p~l~m ~ are r~t~t~bly
mounted About ~n axls 122 or 5~j in the hous~ng 57 by
mean~ of ~ prl~m ~earlng 27 arr~nged on ~hi~ out~r
~urfac~. A d~lv~ wheal 12G is ln contac~ wlth the
: 25 prl~m holder 26 ~ia a co~plln~ ~;urface 138. The ~rlYe
wheel 12 may h~ve d ~ tlon-incre~ln~ coatlng, for
example ~n elastomer ~oatlng, or m~y be in the foxm o~
a pin~on whlch lnteracta wl~h diam~trically oppo~e~
; recesses ln ~he coupling surface 138. ~his en~ures
exact hut noisiex drlvin~ o~ the rotating pris~, whl~h
$~ not wl~hout problem~ p~r~icularly at hl~h rota~y
~p~ds~ The ~earlng nol~e whlch occurs a~ the~æ hlgh
rotaxy ~peed~ 1~ a ve~y critical polnt and ~t is
t:h~r~r~r~ ,y ~o ~ pt ~ ~ea~ ~ pc.4~.~ hl ~ ~.
~ompen~a~e e~e~y ~ccen~ricl~y by means o~ balancln~
~ welgh~ lB.
; ~he ~rrange~Qnt ~c~o~dln~ ~o Flg. 1~ ~haws fl
-, , . " ., . , . , :
r~
204~
1~
po~ ibill~y ~o~ ~edu~ln9 ~he xe~ul~lng ~earin~ nol~e.
~o~ thi8 pu~pc:se, a ball bearlng 127k 19 provlded
between tchat p~rt o~ t~e vlaw~ng part 120k whi~h
corxes~ond~ to the bs~;eplate 7k an~ 1 driven b~ tha
5 , çlbar wheel ~lX of ~ d~ 5rive 62}c and the pr~3m holc~r
2~k, or in ~ Ca5e the holder o~ ~he lens ~y~tem 8k.
~ince 'chs pE~lsn hc~lder ~k And hen~Q ~180 the holder c>~
len~ ~y3tem 8k, ~h~ch i~ connectæd ~o the 8~cl pxl~m
holder ~o ~ha~ ro~e~ rigldly wlth it, should
10 rot~e at ~nly half th~ f~quency - r0la~1ve ~o the
~îewl~g paxt 120k - ~he xot~ry speed ef ~ecti~e ~t ~he
ball bearing 127~c i8 only half the valu0 o~ th~t for
beArlng eorre~pondlng tv, ~or exa~ple" Flg. 15.
Anoth~r d~lv~, ~or plctu~e 1, lg ~hown in Flg.
4 ~r.d S. The plcture ld ln ~hls c:~se i~ held in a~
.. approximately di~c-shaped pictu~e holder 42~. ~he
cl~cumf~rence of the plcture holder 42d 1~ in the ~orm
o~ coupling ~urrace 38d and lie~ between, fox example,
fiv~ ~oller~ 43~ w~ich a~e rotat~ly mounted ln a
pi~tUxe holcler 44d ~lxed ~o ~he hou~ln~. ~ s~x~h
roller serves ~s ~ dr~ve wheel 30d, whlch i~ driven by
a picture ~ e 41d, via a belt 45 and ~elt pulleys 40
and 40b. The ~lcture holder 42~ and h~n~e the
~r~n~mltt~d~ ht plcture ld are ~otat~d ~out an ~xi~
, 2~ 56d, which i~ at ri~ht angles to the picture ~urace.
``~ Sprlng clampq, lockin~ ~m8 o~ the like ~whlch a~e not
~hown~ are p~ovided ~or ~lx~ng the tran~mitted-light
pi~t~2 ld in tha plc~ure holder 42d.
; ~he plcture ld c~n ~lso ~e change~, as ~hown ln
Fi~. ~ and 10 ~nd lndicate~ ln Fig. 12 ~nd 18. A
num~er o$ transmitted-light picture~ lb ~re ho~d ln
gazlne 34 a~ the ~de of ~he pro~ectlon cham~er 31. . ~;
In8ertlon ~nd withdrawal or chang~ng of the plc~u~
are effected by ~ plc~ure-changln~ part 35, whlch l#
3~ ~hown ~che~ tlcally an~ ha~ a grlpping a~ 36. Fu~th~r
transpoxt of the ma~azln~ is ef eected ~y ~ tran~po~t .
un~t 37~ ~hlch ~S llkewi~e only shown ~ch~m~tlcally and
,.
.
2 0 4 ~
17
whlch c~n be connect~d ln lo~lstlc termS wl~ h~
pl~tu~e-~hanglng part 35. ~he m~ga~lne 34 1~ ~hown a~
a stral~ht ~ox bu~ m~y al~o ~e in the fo~m of ~
~: carou~el magaz ~ ne . 'rhia would permi~c unln~e~rup~e~
5 , p~cture pre~entation ~or ex~mple ~o~ ~d~rer~ sing
purpos~
Flg. 1 ~how~ a po~siblli~cy for chan~ins~ plcture
1 a~ ~uCh, ~hat, i~ to ~ay Wit~lOUt ~okatln~ lt. For
~ . .
thi~ purpo~e~ it 1~ ln ~he form o~ a t~ansmlt:k~d-llg~
LCD la, the plctur~ content o~ whlch ~an be changed Yia
- ~ pLc~ure ~on~rol 70a. ~he coupl~ng ~l~n~e 60a
. con~c~ins two concen~rtc ~lip r~ng~ 78a, whlch ~r~
' connected ~a current ~onductor 81a to ~ p~a~us~e
rontrol 70a Whl~h 1~ fastened to ~he ba~eplate 7d ~nd
indicated l;y d~h-dot lines and whlch in t~xn drl-re~
th~ LCD display via control lines 71a. Th~ #llp rln~
70~ and 'che ~taf lc brushe~ 77a supply the plc~u~e
-. cantxol 7~a or the L~ tran~mi~cted-light pl~t~re la
wl~h ~lectric power. ~he powe~ aupply co~ld, however,
20- al~o be provided lnduc~ively or autonomously - for
, ~hort operatin~ tlmes - by mean~ o~ batter~e~ ln the
~otatin~ part~ Ins~ea~ of an LCD ~i~play, othe~
, transillumlnat~ble, elec~onlcally controlle~ dlsplays
:1 may be u~ed. ~he pic~ure content of la can be
2S v~rtually freely selec~ed and changed by means o~
~uit~le con~rol commands. The pleture ~ont~ol 70a c~n
~lso contain a ~emory ~ith ~ lo~p, ~o tha~ thQ plctures
can be chan~ed at prep~ogramm~ lnt~rval3.
- as ~hown - 81ip ring arr~ngements ~17, 78)
~0 are presen~ for power trans~lsslon, it is al~ p~ le
~o transml~ control slgnals, ~or examplP hlgh-~requ~ y
cuxren~ pulse~ the llp rings fro~ a ~tat~
p~ctu~e ~on~rol 7~a'. Acco~dlngly, ~pply line~ ~rom
plc~ure control 70A' tO brushes 77a ~e d~awn ln
da~h-dot llnes. Alternat~vely ~o u~h a tran~ml~lan,
~nf~ared transmi~er~ 76a ~re po~sl~le, ~he
transm~tterg belnq mounkl3d ln hole~ in the dr~m holder
~ . ''
2049~11
., 1.~ '
63a ~nd ~elng located oppos~te infrared r~cei~ser~ .7$a
~rom tlrne to tim~ du~ing ro~ation of the ~a~epl~te 7a,
whlch r~e~elve~ anchored there ln hole~. By m~an~
o~ ~n arrangem~n~ of ~everal ~uch tran~mi~te~ and
5, re~eivers 76 ~nd 75, re~p~cti~ely, vlrtually an~ nu~er
- of piece~ of lnform~tion ~n be tr~n~mitted wl~hout
- i wlre~ to th~ plcture contrs:~l 70c . In~ared
~xansmlttçr~ and receivers could al~o be replaced ~y
lnductive, c~pacitiYe or ~imllar trans~ ion 8y~tem3.
10The static pictl~xe control 70a' i5 corlne~ted
vla aontrol lin~9 71a~ id outslde the ho-l3ing 57a,
~o ~ data lnp~l~ appa~atu~ 79a ( ~or exampl~ a keyboa~tl
ar pc) ~ by means of which the plcture con~ent of 1~ can
be changed.
15To remo~T~ the heat generated in th~
ill~tmlnating means du~ing operation, A coolln~ means
mu~t be pro~rlded ln mo~t cases ~or the concave mlrro~
33 or light source 32. For thls p~trpose, for exampl~,
quiet ax~al rolle~ f~n Can be u~ed a~ ~an ~oolln~ S4
~0~nd ~oncen~ric coollng rib~ 85 ~an be ~ormed on 'che
c:oncave nllrror 33 (~ae Fig. ~, ~ and 2a~. A ~iant in
which the ~an cooling can be omltted is shown ln Fig.
~0, ~n which fan blade~ 58u ~re mounted ~elow the
couplln~ flange 60u or provided in the form o~ a ~lngl~
~5unit and ro~ate w~ th the baseplate 7 or the prlsm 2 .
Since the cooling rlb~ 8Su of the Concave miXro~ 33u
,~ are p~rallel to th~ axis o~ rot:a~lon 56u, the ~ tlon
dl~ec~ion ~hown by 2r~0w B~ ~8 rea~hed during rotation
- of the fan blade~ 58~. Alr outlets 59~ ln ~he ~ase of
30the housLng 57u lncrease the effect~venes-~ of ~he ~ir
~t rcula~lon
Fi~. 6 show~ vent$1atlon holes S9e lrl the l~mp
hold~ e. ~he low~r pl~lte 15~ of the pic~uxe~ win~
part 120~ ha~ ~ir ~nlet hole~ 93e th~ough whl~h coollnç
.. ~S~r i~ blowtl ~y a fan cooling sys~em, whlch i9 no~
BhoWn, lnSo the spa~e behind the tr~n-~nlttecl-l~ght
plc ur~ lu. Thl~ coolln~ alr ~lows p~t ~he ll~ht
;: , ' ' , r~,,, ",~", ,, ~,, "~ " "; , ",,
2 ~
~our~e 32u and escapa~ ~chro~lgll the ventlla~ion holes
59u in th~ l~tnp holder l~u. In~ead of an adclition~
~n cooling ~y5tem" the alr lnlet hole~ ~3~1 could be
p~o~ded wl~h ~m~ll gulde ~ux~ac~s so ~ha~ ~r ~
5 , ~orced lnto the ~pace Yla th~se gulde sur~ace~ d~xlng
xotation o~ the plctu~e~ wing pa~t 120u.
~urthersnore, lnf~ared-txan~parent de~l~cting
mlrrors 2S or d~fl~tlng prlsms 3 may b~ pro~lde~ fo:r
~rotectln~ th~ ~lide 1 ~x fllm (Fig. 15) and opt~
component~ ~rom he~t.
~he not unlnterestlnq pos~lblllty o~ ach~evln~ - .
very wlde r~nge of ef~ect~ by dell~ate
nonsynchro~ou~ xotation of p~cture vlewin~ pa~t 120 arld
rotating ps~sm 2 o~ picture 1, whese A pictu~
lS xo~ating ~o~ example about lts own ~xls, can ~e
pre~ented in any ~nclined po~ition ~o the ob~erve~, by
ou~-o~-pha~ rotatlon o~ the baseplate 7 o~ of the
~otating prism 2. Sp~ed-~e~ul~lng c~r~ui~s, whlch are
not ~hown and which pe~mlt random ~rarlatlon of ~otary
speed~ in xela~ion to one ~no~her, ~ould have ~o be
provlded for this purpose in the lndl~rld~al
embodiments .
~he varlant~ shown lr. Fi.g. 4, 5, 10 and 13 c~n
also be used A~ pro~ector~ alon~, withou~ ~u2~ther
2S defle~tin~ or guid~ m~n~ or wlthout further rotat~ ng
p~8, ~uch a~ mlr~or~ and ~rld~, f~ee rotation of
pxo~cted imag~ ~eln~ ~he novel fe~t~lre ~omp~red w~th
the prior ar~. Thus, ~or ex~mple ~u~ln~ ~ ~llde
lec~urs, ~ picture acciden~cally pro~ected upslde down
~an be rotated into ~he correc~ po~tion ~y mea2~ of
~in~le manip~latlon. In the past, it wa~ generally
nece~ary ~o xemove ~he sl~d~ from the pI~o~ection
chan~er, tuxn lt ~round ~nd inserk it ag~ln. ~.; .
. :''
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