• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a display surface (5, 15) and photosensitive detector surface (4) existing input surface for controlling a data processing system and a method for the operation of such an input surface. In a preferred embodiment, the detector surface (4) and the display surface (5, 15) are arranged at a distance from one another and the layer which adjoins the detector surface (4) on the display surface side is an air layer. In a preferred mode of operation, a light beam, which is sent from a light pointing device on the input surface for controlling the data processing system, radiation components in two different spectral regions, wherein a radiation component in the spectral range of visible light and the second radiation component in the spectral range of IR light or UV light, whereby only the radiation component present as IR or UV light is absorbed by the detector surface.
    公开号:AT511393A1
    申请号:T454/2011
    申请日:2011-03-31
    公开日:2012-11-15
    发明作者:
    申请人:Isiqiri Interface Tech Gmbh；
    IPC主号:
    专利说明:

    II · »· · · · * * *» ·· * «« «* *» * * * * «* *» k «t *» * * J 429 .. ........ ....
    Input surface for a data processing system consisting of display surface and photosensitive detector surface
    The invention relates to an existing display surface and photosensitive detector surface input surface for a data processing system.
    Under the designation " input surface for a data processing system " Here, an area is meant on which the position coordinates of a local input mark displaceable by a human being can be recognized by a data processing system, functions being assignable to different area areas on the input area by the data processing system which are controllable by selecting these area areas by means of the input mark. A classic example of such an input surface is the screen of a data processing system in conjunction with a computer mouse and a cursor which can be moved on the screen by means of this with which surface areas, for example in the form of buttons, can be clicked. Another classic example is touch-sensitive screens, in which by means of a finger on symbols represented by the data processing system inputs into the data processing system is possible.
    It is proposed in AT 506617 A1 to realize an input surface for a data processing system consisting of display surface-typically projection screen and light-sensitive detector surface, whereby the data processing system for the users understands the position of the light spot caused by a laser pointer on the display surface as input mark is, is controllable. The photosensitive detector surface is constructed as a planar, a layer with fo-toluminescent properties-containing optical waveguide, are attached to which photoelectric sensors.
    page 1
    Light of suitable wavelength, which strikes the photoluminescent layer, is absorbed there and causes photoluminescence light of longer wavelength, which is passed in the optical waveguide to the photoelectric sensors and causes an electrical signal to them. The amplitude of the electrical signals at the sensors depends on the intensity of the incoming light and thus on the distance of the causing light spot on the optical waveguide from the individual sensors. This can be calculated back to the position of the causing light point from the electrical signals measured at the individual sensors.
    An advantage of this concept for input surfaces is that it can be implemented inexpensively, above all, even in the case of a large-area embodiment, and that therefore even digital signals with a very high bit rate per time can be correctly identified. Furthermore, this concept allows for input from a greater distance if the light spot is generated by means of a special laser pointer.
    Disturbances and restrictions result from the fact that the display surface and the photosensitive detector surface adjacent thereto adversely affect each other. Because light is lost from the waveguide mode by coupling it to the display surface, the triggering light pointer must operate with a very high light intensity. The light coupled out from the waveguide mode to the display surface causes disturbing color effects there. The detector surface may also interfere with the display when it is between the display area and parts of the display area and the viewer.
    The object underlying the invention is to provide an input surface consisting of display surface and light-sensitive detector surface for a data processing system, the detector surface being based on the functional principle described in AT 506617 A1. Compared to the known design, the decoupling of light from the waveguide mode of the detector surface to the display surface is to be reduced, without resulting in a disturbing strong visibility of the detector surface. For solving the problem, it is proposed according to the invention to arrange the detector surface and the display surface at a distance from each other and to provide an air layer as a layer which adjoins the detector surface on the display surface side.
    By an air layer adjacent to the detector surface, a strong change in the refractive index occurs at the boundary layer of the detector surface, whereby the critical angle of total reflection is relatively steep and hardly more light is lost from the waveguide mode to the environment.
    At the detector surface forcibly elements are attached, which are opaque. The photoelectric sensors, which, for reasons of the desired good spatial resolution of the detection on the detector surface, must also be arranged at regions which are far away from the edges, are certainly opaque. At least partially opaque, the connecting cables to these. With the lifting of the detector surface from the display surface, it is no longer quite easy to position these opaque elements with respect to the detector surface so that they hardly disturb. By a bundle of measures, which must be adapted to the type of display area used, but this problem can be surprisingly well mastered.
    The invention is illustrated by means of a drawing:
    Fig. 1 shows for the exemplary dye 9,10-diphenyl-anthracenes (DPA), which is useful as a fluorescent dye in an input surface according to the invention, in two graphs absorption of incident light and emission of fluorescent light over the wavelength of light
    Page 3
    J 429
    Fig. 2 is a schematic diagram of a first input surface according to the invention in a front view.
    Fig. 3 is a schematic diagram of the input surface of Fig. 2 in side view.
    4 is a schematic diagram of a second input surface according to the invention in side view.
    The layer structure of the photosensitive detector surface 4 is sketched in FIG. For the most part, the detector surface is made of a transparent plastic, typically PET or polycarbonate, in the form of one or more layers. In at least one of these layers 4.1, a luminescent dye is introduced into the polymer in high concentrations. The introduction is preferably done by coextruding the polymer and the dye. It is important for the present application that the absorption of the dye is located far at the edge of the visible light spectrum and covers only a small spectral range there. Typically, appreciable absorption is only appreciable in a narrow band at wavelengths less than 425 nm or greater than 625 nm. As a result, the dye causes only a very faint color impression on the (visible) detector surface (ideal would be no color impression) and it can still be a luminescent pointer with visible laser light are used.
    For safety reasons, luminescent hands with visible light are by far preferable to those with infrared light, although the latter would be advantageous in terms of the color impression on the detector surface. Infrared light, because of its invisibility when glaring an eye, hardly elicits a protective reflex in the eye, although it causes damage at high intensity, such as visible light in the eye. Infrared light pointers may therefore only be operated with extremely low light intensities. The same arguments speak against UV light as against IR light. Furthermore,
    Page 4 • «4 ** · · · · * I *« * «« · · 9 j 429 * .. * * .. * * .. *.: .. .. '' Visible light gives the user an orientation in which direction the luminescent pointer points, especially if it is a laser pointer used remotely.
    As dyes, for example, 9,10-Diphenylanthracene (DPA), which absorbs only in the deep blue or squarylium dye III (SqIII), which absorbs only in the deep red, suitable. Both dyes give even in high concentrations only a faint color impression, which can be corrected by color adjustment of the display. Sqlll absorbs laser light at 640nm, DPA at 405nm, both standard wavelengths for diode lasers. Both wavelengths are at the edge of the visible spectrum, therefore on the one hand approved for class 2 laser, on the other hand, they dye so weak that films are hardly colored even with high dye concentrations. By slight modifications in the molecular structure, the spectra can be more precisely adapted to a laser wavelength for both dyes.
    Absorption behavior and luminescence emission behavior as a function of the light wavelength of the dye 9,10-diphenylanthracenes is shown in FIG. It can be seen that this dye absorbs appreciably only at wavelengths in the deep blue wavelength range. Accordingly, a film which also contains this dye in high concentrations will scarcely have a color impression and will not appreciably disturb the readability of a display located behind it.
    Depending on the functional principle of the display surface 5, 15, it is advantageous to arrange the detector surface 4 as seen by the viewer before or behind the display surface.
    For display surfaces in which the displaying image is generated by a plurality of controllable light sources arranged on the display surface itself, the detector surface must be arranged on the viewer side of the display surface.
    Be te d • * * · · J 429
    Such a combination of display surface 5 and detector surface 4 is shown in FIGS. 2 and 3.
    The display surface 4 has light sources 3, typically LEDs, or combinations of LEDs arranged in rows and columns in a pixel grid on the display surface, the light sources 3 (= pixels) not being close to each other, but between the light sources a small distance lies. The forcibly non-transparent parts of the detector surface 4 must be made as fine as possible and be arranged so that they lie between the light sources 3 with respect to the coordinates lying parallel to the display surface.
    According to FIG. 2, therefore, the forcibly non-transparent photoelectric sensors 1 are arranged between light sources 3 and in each case one electrical conductor 2 to a photoelectric sensor 1 runs in the intermediate space between two rows or two columns of light sources (for intrinsic reasons mostly also intransparent) ).
    Especially with large display surfaces designed as LED walls, where the input by means of light pointers is extremely important, the width of the teaching room between adjacent light sources is several millimeters to centimeters, so that sensors (1) and printed conductors (2) can easily fit between the light sources Find.
    The required second connection (ground connection) to the photoelectric sensors 1 is preferably formed as a thin, transparent, largely uninterrupted conductive surface layer 4.2.
    The photoelectric sensors 1 are typically photodiodes implemented as silicon-chip. They can be bonded directly to small conductor surfaces, minimizing the covered area. In a currently well-available design, they are square and cover an area of 0.3mm2. The photoelectric sensors 1 can also be designed as a chip,
    Page; 6
    J 429 which also performs the function of the transimpedance amplifier (current-voltage conversion and amplification) in addition to the photoelectric conversion.
    The printed conductors 2, that is to say the electrical connection between the photoelectric sensors 1 and the read-out electronics, are usually designed as a narrow, nontransparent metal layer for reasons of expense. They have to be very thin and positioned precisely so that they can find space between the light sources 3 and not attract attention. For fast applications, it is recommended to shield these tracks 2. This can be done by means of transparent, conductive coated films, such as conductive polymers.
    With advancing technological development, it will certainly be easier and more economical to perform the printed conductors 2 transparent, for example, conductive polymers, nanotubes or graphene.
    So that the photoelectric sensors 1 and the intransparent conductor tracks 2 of the detector surface 4 never cover light sources 3 when viewing the display surface 5 from the largest possible viewing angle range, the detector surface 4 must be arranged very close to the display surface.
    In a very advantageous embodiment, the photoelectric sensors 1 protrude beyond the surface layer 4.2 of the detector surface 4 and are in contact with the display surface 5 with their outer surface facing away from the detector surface 4.
    By the photoelectric sensors 1 are arranged distributed in a uniform spacing grid to each other over the entire detector surface 4, thus a stable, very small distance between the functioning as a waveguide part of the detector surface 4 and the display surface 5 is stable. If the display surface 5 is curved slightly convexly not toward the user side, it is important for the height of the photoelectric sensors 1 projecting beyond the detector surface 4 to be curved
    Is greater than the curvature of the display area between points of the display surface at which diagonally adjacent to each other arranged photoelectric sensors 1 abut. It is advantageous to provide a cover layer on the photoelectric sensors 1 on the side facing away from the detector surface 1, by means of which the height of the sensors 1 effective for the spacing function is increased and which also protects the sensors.
    In a preferred embodiment, the lines consisting of interconnect 2 and insulating material layer project to the photoelectric sensors 1 via the surface layer 4.2 of the detector surface 4 and lie on the display surface 5 with a lateral surface part facing away from the detector surface. This results in a particularly stable adjustment of the distance between the detector surface 4 and the display surface. 5
    FIG. 4 illustrates the conditions when a display surface 15 is used which is at least partially transparent and is irradiated from the side facing away from the user by a flat light source 6. This is the case with LCD screens, plasma screens and rear projection screens.
    In this case, the detector surface 4 is preferably arranged in the space between the light source 6 and the display surface 15, ie on the side of the display surface 5 facing away from the user. Unlike the previously discussed arrangement, a larger distance between the display surface 15 and the detector surface 4 is advantageous here. This distance should be greater than the length of the core shadow 7 protruding away from the detector surface 4 of non-transparent parts of the detector surface 4, typically of photoelectronic sensors 1. This ensures that no core shadow 7 of non-transparent parts falls on the display surface 15. In order to call these non-transparent parts only a very low-contrast, often with the eye not detectable image on the display surface 15. In order for a light spot detected on the detector surface 4 to radiate out of the widest possible angular range
    Page 8 «· *« »I« * * # * * «I · I * • ι» * 4 * * * j 429 · .. * · .. · · .. *.: .. .. * .. correlated well with the intersection of the light beam of the light pointer with the display surface 15, the detector surface 4 should not be unnecessarily far away from the display surface 15. The smaller-area and finer opaque parts (photoelectric sensors 1, printed conductors 2) of the detector surface 4 are, the closer the detector surface 4 can be brought to the display surface 15, since the core shadows 7 of the non-transparent parts are shorter.
    In both discussed construction principles, it makes sense to arrange the read-out electronics for the photoelectric sensors 1 of the detector surface 4 at the edge of the detector surface, outside the part of the display surface 5, 15 used for the image reproduction.
    The readout electronics is typically a chip in which the electrical signals are processed by a plurality of photoelectric sensors 1 and the measurement information is transferred to a data line leading away.
    The use of a light beam which has two spectral ranges, one of which relates to visible light, and the second range of IR light or UV light is entirely conceivable and advantageous in one important aspect. Typically, this can be combined with two light sources in a light-pointing device, namely a source which transmits in the visible spectral range and a source which transmits invisible light, ie IR or UV light, in a spectral range effective only for the detector surface.
    The advantage of this is that you can then use a detector film, which absorbs only in the invisible spectral range and you can still see a visible mark on the display area.
    The disadvantage of this is in addition to the cost of two light sources, the risk, or the unpleasant feeling that the visible light component · can fail for some reason and the invisible
    Page 9 • * «* ft» • * I * * »« * * ft * * * J 429 * .. * * .. * * .. ·
    Light component could still be present. This would mean that no protective reflex would be triggered if the remaining invisible light component - which in Norraalbetrieb must have a relatively high intensity in order to be practically usable - falls into an eye and causes damage there by glare.
    This danger can be avoided by connecting the controls of the two light sources - mainly electronically - so that when the source of visible light fails, the source of IR or UV light is also switched off or switched off. At least from a psychological point of view, however, people who know about this functional principle may be left with disturbing residual uncertainty.
    Of course, instead of the combination of two light sources, one of which illuminates with relevant intensity in the visible spectral range and the second with relevant intensity in the IR or UV range, one can also use a single light source which illuminates with relevant intensity in both spectral ranges.
    Even when using a light beam, which as just discussed has two spectral ranges, it is advantageous to provide an air cushion between display surface (5, 15) and detector surface (4) to radiation loss due to excessive coupling from the waveguide mode in the detector surface (4th However, it is no longer so extremely important, since at least the effect of unwanted color phenomena on the display surface can be avoided, even if the guided in the waveguide mode of the detector surface (4) light in the IR or UV spectrum.
    Page 10
    权利要求:
    Claims (11)
    [1]
    1. Display surface (5, 15) and photosensitive Detektorflä surface (4) existing input surface for controlling a data processing system on the positioning of the impact point of a light emitted by a light pointing device light beam on the display surface (5, 15), to which extends parallel to the display surface (5, 15) a photosensitive detector surface (4) which is struck by the light beam together with the display surface (5, 15) and which generates electrical output signals which are dependent on the point of incidence of the light beam, wherein the detector surface (4) is constructed as a transparent planar optical waveguide, which has a layer (4.1) in which a dye having photoluminescent properties is contained and at which remote from the edges of the detector surface locations photoelectric sensors (1) are mounted on which the Optical waveguide guided light is coupled out and generates an electrical signal, characterized in that detector surface (4) and display surface (5, 15) are arranged at a distance from one another and that the layer which is adjacent to the detector surface (4) on the display surface side is an air layer.
    [2]
    2. Input surface according to claim 1, characterized in that in the layer (4.1) a dye with photoluminescent properties is contained, which absorbs visible light predominantly only from a narrow edge region of the spectral range of visible light.
    [3]
    3. Input surface according to claim 1 or claim 2, characterized in that the display surface (5) has a plurality of light sources (3), that the detector surface (4) at the Be-11

    User side of the display surface (5) is arranged and that from the detector surface ¢ 4) photoelectric sensors (1) are up and abut with their from the detector surface (4) facing away from the outer surface of the display surface (5).
    [4]
    4. Input surface according to one of claims 1 to 3, characterized in that the display surface (5) has a plurality of light sources (3), that the detector surface (4) on the user side of the display surface (5) is arranged over the detector surface (4) electrical lines run, each of which contains a conductor track (2) connected to a photoelectric sensor (1), projecting upwards from the detector surface (4) with its cross-sectional area and having a lateral surface part facing away from the detector surface (4) Display surface (5) abut.
    [5]
    5. input surface according to claim 3 or claim 4, characterized in that the light sources (3} LED's are.
    [6]
    6. Input surface according to one of claims 3 to 5, characterized in that the light sources (3) are arranged in a grid of spaced apart rows and columns and that the photoelectric sensors (1) and leading to them interconnects (2) in the Normal projection on the display surface (5) between these rows and columns are arranged or run.
    [7]
    7. Input surface according to claim 1 or claim 2, characterized in that the display surface (15) is at least partially transparent and is illuminated from the viewer side facing away from a light source (6) that the detector surface (4) between the light source (6) and Display surface (15) is arranged and that the distance between the detector surface (4) and display surface (15) is greater than the normal to the detector surface (4) measured length of the core shadow (7), the undurch- side 12 * · * * * * 429 cause visible elements (1, 2) of the detector surface in the light of the light source (6).
    [8]
    8. An input surface according to claim 7, characterized in that the display surface (15) is an LCD screen.
    [9]
    9. An input surface according to claim 7, characterized in that the display surface (15) is a plasma image screen.
    [10]
    10. Input surface according to claim 7, characterized in that the display surface (15) is a rear projection screen.
    [11]
    11. A method for operating a display surface (5, 15) and photosensitive detector surface (4) existing input surface for controlling a data processing system on the positioning of the point of impact of a Lichtzei gegerät emitted light beam on the display surface (5, 15), including extending parallel to the display surface (5, 15) a photosensitive detector surface (4) which is struck by the light beam together with the display surface (5, 15) and which generates electrical output signals which are dependent on the point of incidence of the light beam, wherein the detector surface ( 4) is constructed as a transparent planar optical waveguide, which has a layer (4.1) in which a dye having photoluminescent properties is contained and at which remote from the edges of the detector surface locations photoelectric sensors (1) are attached, in which in the optical waveguide Guided light can be coupled out u nd generates an electrical signal, characterized in that with the light pointing device, such a light beam is transmitted to the input surface (4) having radiation components in two different spectral regions, wherein a radiation component in the spectral range of visible light and the second radiation component in the spectral range of page 13 • ¥

    J 42 9 IR light or UV light and wherein only the present as IR or UV light radiation component is absorbed by the detector surface. Page " 4
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    同族专利:
    公开号 | 公开日
    WO2012129583A1|2012-10-04|
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    US20140015806A1|2014-01-16|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    KR20100030022A|2008-09-09|2010-03-18|삼성전기주식회사|Opto-touch screen|AT512461B1|2012-02-10|2018-02-15|Isiqiri Interface Tech Gmbh|DEVICE FOR ENTERING INFORMATION TO A DATA PROCESSING PLANT|
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    法律状态:
    2018-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20180331 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA454/2011A|AT511393B1|2011-03-31|2011-03-31|INPUT DEVICE FOR A DATA PROCESSING SYSTEM COMPRISING DISPLAY AREA AND LIGHT-SENSITIVE DETECTOR SURFACE|ATA454/2011A| AT511393B1|2011-03-31|2011-03-31|INPUT DEVICE FOR A DATA PROCESSING SYSTEM COMPRISING DISPLAY AREA AND LIGHT-SENSITIVE DETECTOR SURFACE|
    US14/007,509| US20140015806A1|2011-03-31|2012-03-26|Input panel consisting of a display panel and a photo-sensitive detector panel, for a data processing installation|
    EP12724275.8A| EP2691840A1|2011-03-31|2012-03-26|Input panel consisting of a display panel and a photosensitive detector panel, for a data processing installation|
    PCT/AT2012/000079| WO2012129583A1|2011-03-31|2012-03-26|Input panel consisting of a display panel and a photosensitive detector panel, for a data processing installation|
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