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公开(公告)号：US11460809B2
公开(公告)日：2022-10-04
申请号：US15563016
申请日：2016-03-29
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Bo Kroll , Norbert Leister
Abstract: The invention relates to methods for computing holograms for holographic reconstruction of two-dimensional and/or three-dimensional scenes in a display apparatus, wherein a scene for reconstruction is broken down into object points and the object points are encoded as sub-holograms into at least one spatial light modulation device of the display apparatus. A reconstructed scene is viewed from a region of visibility. At least one virtual plane of the at least one spatial light modulation device is stipulated on the basis of a real plane of the spatial light modulation device. A computation of sub-holograms is performed in the at least one virtual plane of the at least one spatial light modulation device.
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公开(公告)号：US10585394B2
公开(公告)日：2020-03-10
申请号：US15429759
申请日：2017-02-10
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
Abstract: A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.
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公开(公告)号：US10359626B2
公开(公告)日：2019-07-23
申请号：US15355340
申请日：2016-11-18
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
IPC: G09G5/00 , G02B27/00 , H04N13/315 , H04N13/32 , H04N13/366 , H04N13/368 , H04N13/383 , H04N13/398 , G02F1/13 , G02F1/1337 , G02F1/29 , G02B5/32 , G03H1/22 , G02B27/22 , G02B5/20 , G02B27/26 , G06F3/01 , G02F1/01 , G02F1/13363 , G03H1/02
Abstract: The invention relates to a display, in particular an autostereoscopic or holographic display, for representing preferably three-dimensional information, wherein the stereo views or the reconstructions of the holographically encoded objects can be tracked to the movements of the associated eyes of one or more observers in a finely stepped manner within a plurality of zones of the movement region. In this case, the zones are selected by the activation of switchable polarization gratings.
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公开(公告)号：US10268080B2
公开(公告)日：2019-04-23
申请号：US15615372
申请日：2017-06-06
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
IPC: G02F1/139 , G02F1/1337 , G02F1/1343 , G02F1/29 , G02F1/137
Abstract: A phase modulator for polarized light, comprising a first substrate with a first surface and a second substrate with a second surface, a liquid crystal layer between the two substrates and an electrode arrangement. The phase modulator is usable as a variable deflection grating, and liquid crystal materials which are currently conventional are usable for its production. A phase modulator has an out-of-plane angle of the liquid crystal molecules next to the two surfaces whose magnitude is greater than 0 but less than or equal to 45 degrees, and an electrode arrangement controllable such that an in-plane component of the liquid crystal molecule orientation is adjustable in an angle range of up to 180 degrees, and the rotation sense of the liquid crystal molecules next to the first surface is opposite to the rotation sense of the liquid crystal molecules next to the second surface.
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公开(公告)号：US10168540B2
公开(公告)日：2019-01-01
申请号：US15687585
申请日：2017-08-28
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Bo Kroll , Gerald Futterer , Norbert Leister , Stephan Reichelt , Ralf Haussler
IPC: G02B27/22 , H04N13/366 , H04N13/305 , H04N13/31 , G03H1/02 , H04N13/32 , H04N13/322 , G02B5/32 , G02B26/08 , G02B27/00 , G02F1/29 , G03H1/22 , G03H1/26 , G02F1/13
Abstract: For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers.
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Patent Agency Ranking
公开(公告)号：US20150279293A1
公开(公告)日：2015-10-01
申请号：US14430259
申请日：2012-10-01
Applicant: SEEREAL TECHNOLOGIES S.A. , SHARP CORPORATION
Inventor： Robert Missbach , Stephan Reichelt , Norbert Leister , Ralf Haussler , Naru Usukura , Hiromi Katoh , Yuichi Kanbayashi
IPC: G09G3/36
CPC classification number: G09G3/3614 , G03H1/2294 , G03H2225/32 , G09G3/006 , G09G2320/02 , G09G2320/0214
Abstract: A controllable device for phase modulation of coherent light comprises a modulator matrix having a plurality of liquid crystal modulator cells each being adapted to modulate a phase value of light passing through a liquid crystal modulator cell depending on a voltage, which is applied to the liquid crystal modulator cell; at least one polarity area of said modulator matrix including at least one liquid crystal modulator cell; at least one storage unit for storing at least one pair of voltage values of which one has a positive and the other has a negative polarity for the liquid crystal modulator cells, whereby the pair of voltage values corresponds to a predetermined phase value; and a control unit for selectively applying one pair of voltage values to one liquid crystal modulator cell.
Abstract translation: 用于相干光的相位调制的可控装置包括具有多个液晶调制器单元的调制器矩阵，每个液晶调制器单元适于根据施加到液晶的电压来调制通过液晶调制器单元的光的相位值 调节细胞; 所述调制器矩阵的至少一个极性区域包括至少一个液晶调制器单元; 至少一个存储单元，用于存储至少一对具有正的电压值，另一对具有用于液晶调制器单元的负极性，由此所述一对电压值对应于预定相位值; 以及用于选择性地将一对电压值施加到一个液晶调制器单元的控制单元。
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公开(公告)号：US20150205182A1
公开(公告)日：2015-07-23
申请号：US14417179
申请日：2013-07-26
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
IPC: G02F1/29
Abstract: A polarization grating for diffractive light deflection, having at least one liquid crystal layer on a substrate, wherein the liquid crystal molecules having a periodic change in orientation. The invention further relates to a light deflection device and a method for deflecting light. A polarization grating for an oblique incidence angle of the light is specified, in particular having high diffraction efficiency for the +1st order for a specifiable or variable incidence angle in a wide range of incidence angles. A polarization grating has at least one additional orientation change of the liquid crystal molecules such a way such that light of a specified polarization has a controllable angle of incidence and experiences a specifiable phase retardation upon passing through the liquid crystal layer.
Abstract translation: 一种用于衍射光偏转的偏振光栅，在衬底上具有至少一个液晶层，其中液晶分子具有定向的周期性变化。 本发明还涉及一种光偏转装置和一种偏转光的方法。 具体地说，用于光的倾斜入射角的偏振光栅，特别是对于大范围的入射角的可指定的或可变的入射角，具有对于+ 1阶的高衍射效率。 偏振光栅具有液晶分子的至少一个另外的取向变化，使得指定极化的光具有可控的入射角，并且在通过液晶层时经历可指定的相位延迟。
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公开(公告)号：US20150124302A1
公开(公告)日：2015-05-07
申请号：US14361739
申请日：2012-11-29
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
CPC classification number: G03H1/0841 , G02B27/4205 , G02B27/4266 , G02B27/4272 , G03H1/0808 , G03H1/2205 , G03H1/2294 , G03H1/26 , G03H2001/0816 , G03H2001/0825 , G03H2223/23 , G03H2225/33 , G03H2226/02
Abstract: A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.
Abstract translation: 全息图由分配给光调制装置中的相应编码区域的各个子图表构成，并分别分配给要用全息图重建的对象物体点。 通过虚拟观察者窗口，提供了定义的观察区域，观察者观察重构空间中的重建场景。 在虚拟观察窗中计算每个单独对象点的波阵面的复值。 随后将虚拟观察窗中的波阵面的复数值的每个单独振幅乘以校正值，利用该修正值对光调制装置的光束路径中布置在下游的至少一个体积光栅的角度选择性进行校正 。 以这种方式为所有对象点确定的校正后的复数值被求和并变换成光调制装置的全息图平面。
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9.发明授权公开(公告)号：US11914251B2
公开(公告)日：2024-02-27
申请号：US17711207
申请日：2022-04-01
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Bo Kroll , Norbert Leister , Gerald Futterer , Robert Missbach , Stephan Reichelt
IPC: G02F1/1343 , G02B30/00 , G02B30/20 , G02F1/1347 , G02F1/29 , G03H1/02 , G03H1/22 , G02F1/1335 , G03H1/26
CPC classification number: G02F1/134309 , G02B30/00 , G02B30/20 , G02F1/1347 , G02F1/292 , G03H1/02 , G03H1/2205 , G03H1/2294 , G02F1/133504 , G02F1/134318 , G02F2203/24 , G03H2001/0224 , G03H2001/2615 , G03H2001/264 , G03H2225/11 , G03H2225/23 , G03H2225/55 , G03H2225/60 , Y10T29/49155
Abstract: The invention relates to a light modulation device for a display for representing two- and/or three-dimensional image content or image sequences. The light modulation device comprises a light modulator and a controller. The phase and/or the amplitude of a light wave field, which is substantially collimated, can be varied by means of the light modulator depending on the location of the light modulator. The light modulator can be actuated by means of the control device. According to the invention, in the direction of propagation of the light wave field, at least one diffracting unit is arranged downstream of the light modulator. The diffracting unit has a variable diffracting structure. By means of the diffracting structure, the light wave field varied by the light modulator can be diffracted in a variable and predeterminable manner. Further, the present invention relates to a display and a method for producing a light modulation device.
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公开(公告)号：US10578946B2
公开(公告)日：2020-03-03
申请号：US14417179
申请日：2013-07-26
Applicant: SEEREAL TECHNOLOGIES S.A.
Inventor： Norbert Leister
Abstract: A polarization grating for diffractive light deflection, having at least one liquid crystal layer on a substrate, wherein the liquid crystal molecules having a periodic change in orientation. The invention further relates to a light deflection device and a method for deflecting light. A polarization grating for an oblique incidence angle of the light is specified, in particular having high diffraction efficiency for the +1st order for a specifiable or variable incidence angle in a wide range of incidence angles. A polarization grating has at least one additional orientation change of the liquid crystal molecules such a way such that light of a specified polarization has a controllable angle of incidence and experiences a specifiable phase retardation upon passing through the liquid crystal layer.
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