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WO1999039321A1 - Panneau d'image pour presentation et/ou enregistrement - Google Patents

Panneau d'image pour presentation et/ou enregistrement Download PDF

Info

Publication number
WO1999039321A1
WO1999039321A1 PCT/NO1998/000353 NO9800353W WO9939321A1 WO 1999039321 A1 WO1999039321 A1 WO 1999039321A1 NO 9800353 W NO9800353 W NO 9800353W WO 9939321 A1 WO9939321 A1 WO 9939321A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
display according
guides
light guides
light guide
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/NO1998/000353
Other languages
English (en)
Norwegian (no)
Inventor
Kjell Hansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to AU23030/99A priority Critical patent/AU2303099A/en
Publication of WO1999039321A1 publication Critical patent/WO1999039321A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide

Definitions

  • This invention relates to a display panel for image representation and/or recording, comprising a matrix formed by a horizontal and a vertical element set, respectively, adapted to be addressed for selecting points that shall present, alternatively receive light, one of the element sets being optical light guides adapted to receive, or transmit, light at its ends being outside the matrix itself, and being provided with organs positioned at the points for diverting light out of, or into, the light guides and the second element set comprises shutter means for light, the light by addressing of the two element sets directly being brought to provide an image to be presented or directly presenting the image to be recorded.
  • Displays for image presentation are today incorporated in various products, for example television sets, oscilloscopes, data terminals, medical and other instruments, instrument panels in cars, air planes and other vehicles, as well as video monitors .
  • the invention relates to a display panel which can be used both for presenting and for recording images. This makes possible new practical applications beyond those mentioned above, for example two-way data terminals which can both display a picture and pick up a picture, such as drawings or the like, two-way television and so forth.
  • the electronic circuits must be positioned on both sides of the 2 screen, which makes it difficult to build large display panels by placing them side by side. In addition this solution make the display more vulnerable, as both the sources and the detectors are placed on the outer ends of the display. This structure also make the surrounding circuits complicated to produce.
  • Figure 1 schematically shows a light guide with one form of light diverting means
  • Figure 2 shows a light guide with a second form of light diverting means
  • Figure 3A and 3B shows in detail the end of a the light guide according to the invention
  • Figure 4 shows a light guide having a rectangular cross- section
  • Figure 5 shows a light guide having a varying cross- section along its length
  • Figure 6A schematically and simplified shows a matrix consisting of a vertical and a horizontal element set respectively, with associated components, as an example of a display panel embodiment according to the invention
  • Figure 6B shows a cross-section according to line B-B in figure 6A
  • Figure 6C shows a cross-section according to line C-C in 3 figure 6A.
  • FIG.l Highly schematically there is drawn therein a light guide or optical fibre 1 at one end of which there is provided a light source 3, whereas a light receiver 4 is placed at the other end of light guide 1.
  • the source and the detector is positioned away from the axis of the light guide, and the ends of the light guide is provided with an at least partially reflective mirror directing the from, or toward, the source or the detector, respectively.
  • the mirrors may be of different types, e.g. metal deposited surfaces or dielectric mirrors. It is also clear that the reflective surface may simply consist of a polished surface which also may serve as a mirror.
  • the angle of the mirrors relative to the axis of the light guide may be chosen according to the positioning of the optical transducers 3,4, and may also be chosen to obtain total reflection in the mirror surface.
  • the mirrors may also be provided with a chosen curvature to obtain a focussing effect.
  • the light guide 1 is provided with means 5 serving to divert light transversally with respect to the longitudinal direction of the light guide.
  • means 5 serving to divert light transversally with respect to the longitudinal direction of the light guide.
  • These diverting means 5 may be in the form of small incisions or notches in the surface of light guide 1, preferably extending transversally through the longitudinal direction thereof. Thereby small reflecting surfaces will be formed, which cause the diversion of light transversally of the light guide and out of this. It will be realized that the angle of the reflecting surfaces formed by the notches 5, must be adjusted so as to obtain a desired direction of the diverted light rays 6, usually as much as possible normal to the longitudinal direction of the light guide .
  • the principle illustrated in figure 1 comprises diverting means in the form of depressions, for example incisions or notches formed in the surface of the light 4 guide 1, but diverting means can also be provided in other ways .
  • Figure 1 shows a light guide with diverting means 5 used to divert light in a direction across the light guides, e.g. for the presentation of an image to the user or spectator. It is well known that light transmission through this type of materials is reversible so that light beams 7 also may move in the opposite direction back to the source. In these cases the incoming light must, however, be guided toward a receiver 4. In figure 1 the incoming light 7 is lead toward a receiver positioned by the other end of the light guide 1.
  • An alternative embodiment may be that the receiver is positioned by the same end as the source, and that the mirror 2 is a beam splitter guiding incoming light toward the receiver.
  • the simplest way to obtain this is to position the receiver in the axis of the light guide, but this will limit the possibility to produce the display as modules which may be positioned adjacent each other without visible transition areas.
  • Figure 2 shows a section of a particular form of light guide 11 in the interior of which there are embedded crystals, for example crystals 12, 13 and 14, having reflecting surfaces having a corresponding effect as the notches 5 in figure 1.
  • Light being sent from light source 3 by the end of light guide 11 thereby will be diverted transversally out of the light guide as indicated at 16, 17 and 18 in figure 2.
  • the mirrors are comprised by angularly cut and polished end surfaces in the light guide.
  • Figures 3A and 3B shows in detail the ends on a preferred embodiment of the invention, as seen from one side and from above, respectively.
  • the end is divided into three sones 2A,2B,2C the first sone 2A being an angular mirror guiding light 6 from the source and into the light guide, the second sone 2B being a second angular mirror guiding light from the light guide and out from the display, away from the source, while the third sone 2C is essentially transparent and transmits light directly through the source and out from the display panel.
  • the end sone may *» ) w to to P> P> o UI o Ul o ui o L ⁇ ua ⁇ rr 3 cr ua o TJ i P. 3 P P ⁇ Ml ⁇ 0 CO hf ⁇ TJ rt h( P 1 01 TJ P cr cr P- hh
  • the crystals may consist of iron compounds or other chemical compounds having magnetical properties.
  • the light source 3 in figures 1, 2 and 3 can be a light emitting diode or possibly several such diodes if it is desired to present colour pictures.
  • light receiver 4 can be a light sensitive diode, possibly several diodes if colour recording shall take place.
  • figure 4 shows an enlarged cross-section of a light guide having a rectangular cross-sectional shape.
  • the cross-section of figure 4 is relatively flattened, having long side edges 32 and two short side edges 31A and 3IB. In order to avoid leakage of light outwardly at the corners of the cross- section, these may possibly be somewhat rounded.
  • incisions or notches 34 corresponding for example to notches 5 in figure 1.
  • a light guide it will be comparatively simple and inexpensive to assemble a number of light guides by simply putting these on top of each other with interengaging side faces 32 and the short side 31A with notches 34 facing in the same direction. It will not only be expedient in practice to stack such light guides on each other in order to form a complete matrix, but the very manufacturing of the individual fibres will also be rationalized, since these light guides can be cut or stamped out of a larger sheet formed stock.
  • Figure 5 also shows a light guide 41 having a rather flattened cross-section, but besides this light guide has a diminishing cross-section from one end towards the other.
  • light guide 41 has a substantially rectangular, but much rounded cross-section, 7 corresponding to the cross-section 43 at the opposite end.
  • the thickness is the same whereas the length dimension of the cross-section is larger at the right-hand end 42 than at the left-hand end 42 in figure 3.
  • any diverting means in the form of for example depressions, such as incisions or notches in light guide 41 but such means may have a similar form as shown in figure 1 and figure 2.
  • FIG. 5 is especially suitable if the source 3 and the receiver 4 are both positioned by the widest end of the light guide 1, with a suitable mirror arrangement for directing light to or from the optical transducers .
  • Figures 6A, 6B and 6C show much simplified and at an enlarged scale a matrix or display panel for image presentation and/or recording, to illustrate essential features of this invention.
  • the matrix comprises a set of elements extending horizontally and consisting of optical light guides or fibres 1A, IB, 1C and ID.
  • a set of vertically extending elements constitutes shutter means 33A, 33B, 33C, 33D and 33E, which preferably can be segments containing liquid crystals.
  • shutter means 33A, 33B, 33C, 33D and 33E which preferably can be segments containing liquid crystals.
  • the liquid crystals may be brought into a light absorbing condition, i.e. they can serve as shutter means .
  • Image points are formed at the intersections between the two element sets, an image point 49A being indicated at the top left and another image point 49Z at the bottom right of figure 6A.
  • the width of a shutter element can be for example 0,1mm. This dimension suggests the density of image points in such a matrix.
  • Light guides 1A-D are shown in cross-section in figure 6B, from which it appears that the light guide cross-section 8 is essentially circular, but it has incisions or notches 5A- 5D in order to effect the previously discussed transverse diverting of light.
  • Figure 6C shows more particularly a cross-section through light guide 1C in figure 6A and notches 5C along this.
  • light sources 40A- 40D for the respective light guides 1A-1D, whereas at the opposite ends of these light guides there are provided associated light receivers 39A, 39B, 39C and 39D. For the purpose of illustration these are on the side of the light guides in this figure, and the mirrors are omitted.
  • FIG. 6A-C An additional important part of the matrix in figure 6A-C is a perforated plate 49 (see figure 6A and 6B) which has an aperture for each image point .
  • a perforated plate 49 see figure 6A and 6B which has an aperture for each image point .
  • a shutter element or segment 33A-E lying in front of each vertical row of image points or apertures in plate 49.
  • plate 49 can constitute a back plate or an electrode for applying voltage across the liquid crystals in shutter segments 33A-E.
  • FIGS.6B and 6C illustrate the following examples of ray-paths in the arrangement:
  • light source 40C emits light rays into fibre 1C, in which a light beam 35 is reflected from one of the notches 5C and passes out through an aperture in plate 49 and further on through the shutter element in front of this, the shutter element being considered open for light passage.
  • the beam 36 diverted sideways from fibre 1C through a corresponding aperture in plate 49 will impinge on a blocked shutter segment 33D so that this image point will be dark.
  • the adjacent element 33E has not been activated so that a light beam can pass through this element and thereby will be visible outwards.
  • the light rays will come in as shown for example with beams 37 and 38.
  • Light beam 37 from the outside will pass through an open shutter and will be diverted by a diverting element in light guide 1C towards the left in figure 6C and thereby will be led to light receiver 39C.
  • Light beam 38 is 9 considered to impinge on a blocked shutter and therefore will not be detected at the time represented by the situation in figure 6C.
  • Displaying or recording of colours may be performed by coupling a number of receivers or sources to each light guide, or by using separate light guides for each. In the latter case the three light guides will together constitute one picture point with a common shutter.
  • the display panel according to the invention can be adapted for operation with live images ("motion pictures") .
  • recording is understood as both direct imaging of objects close to the display or recording based upon conventional lens systems. Micro lenses placed directly on the display panel is also possible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

Panneau d'image pour présentation et/ou enregistrement, comprenant une matrice formée d'un ensemble d'éléments horizontal (1A-D) et d'un ensemble d'éléments vertical (33A-E), respectivement, adapté pour être adressé pour sélectionner des points qui présenteront, autrement, recevront la lumière, l'un des ensembles d'éléments consistant en des guides de lumière optique (1A-D, 41) adaptés pour recevoir, ou peut-être aussi pour émettre (40A-D) de la lumière au niveau de ses extrémités se trouvant positionnées à l'extérieur de la matrice, et étant pourvu d'organes (5A-D) disposés aux points susmentionnés pour diriger la lumière vers l'extérieur de, ou peut-être aussi à l'intérieur des guides de lumière (1A-D) et l'autre élément constitue un organe d'obturateur (33A-E) pour la lumière constituant l'image à présenter ou enregistrer directement au travers de l'adressage des deux ensembles d'éléments (1A-D, 33A-E). Ces guides de lumière comprennent au niveau de l'une au moins de leurs extrémités au moins un miroir au moins partiellement réfléchissant adapté pour diriger la lumière émise depuis une source jusqu'à l'intérieur du guide de lumière en direction d'une source appropriée ou d'un appareil de mesure se trouvant positionné à l'extérieur de l'axe du guide de lumière.
PCT/NO1998/000353 1998-01-15 1998-12-02 Panneau d'image pour presentation et/ou enregistrement Ceased WO1999039321A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23030/99A AU2303099A (en) 1998-01-15 1998-12-02 Display panel for image presentation and/or recording

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19980187 1998-01-15
NO980187A NO306588B1 (no) 1998-01-15 1998-01-15 Skjerm for bildefremvisning og/eller -opptak

Publications (1)

Publication Number Publication Date
WO1999039321A1 true WO1999039321A1 (fr) 1999-08-05

Family

ID=19901552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1998/000353 Ceased WO1999039321A1 (fr) 1998-01-15 1998-12-02 Panneau d'image pour presentation et/ou enregistrement

Country Status (3)

Country Link
AU (1) AU2303099A (fr)
NO (1) NO306588B1 (fr)
WO (1) WO1999039321A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006020828B4 (de) * 2005-05-10 2012-12-06 Citizen Electronics Co., Ltd. Multifunktionale Hintergrundbeleuchtungseinheit und Informationsgerät, das diese Hintergrundbeleuchtungseinheit verwendet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915486A (en) * 1986-03-25 1990-04-10 Powercraft As Display panel for image presentation and/or recording
WO1992002006A1 (fr) * 1990-07-20 1992-02-06 Gec-Marconi Limited Dispositif d'affichage a cristaux liquides
WO1993009450A1 (fr) * 1991-10-30 1993-05-13 Rockwell Marshall A Systeme d'affichage base sur les guides d'ondes optiques
US5528399A (en) * 1992-10-29 1996-06-18 Sharp Kabushiki Kaisha Optical address type display device with uniformly functioning optical switching elements each provided for each pixel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915486A (en) * 1986-03-25 1990-04-10 Powercraft As Display panel for image presentation and/or recording
WO1992002006A1 (fr) * 1990-07-20 1992-02-06 Gec-Marconi Limited Dispositif d'affichage a cristaux liquides
WO1993009450A1 (fr) * 1991-10-30 1993-05-13 Rockwell Marshall A Systeme d'affichage base sur les guides d'ondes optiques
US5528399A (en) * 1992-10-29 1996-06-18 Sharp Kabushiki Kaisha Optical address type display device with uniformly functioning optical switching elements each provided for each pixel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006020828B4 (de) * 2005-05-10 2012-12-06 Citizen Electronics Co., Ltd. Multifunktionale Hintergrundbeleuchtungseinheit und Informationsgerät, das diese Hintergrundbeleuchtungseinheit verwendet

Also Published As

Publication number Publication date
NO306588B1 (no) 1999-11-22
NO980187L (no) 1999-07-16
AU2303099A (en) 1999-08-16
NO980187D0 (no) 1998-01-15

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