Abstract: There is provided a display device comprising a substrate; a spatial light modulator and a sealing element. The spatial light modulator is mounted on the substrate and comprises a light modulating region and an electrical connection region adjacent to the light modulating region. The sealing element comprises a primary portion comprising a first material and a secondary portion comprising a second material. The primary portion of the sealing element extends around at least a portion of a perimeter of the light modulating region and the secondary portion of the sealing element extends over the electrical connection region. The first material has a first coefficient of thermal expansion that is greater than a second coefficient of thermal expansion of the second material.

Abstract: There is provided a driver for a spatial light modulator comprising a plurality of pixels. The driver is configured to receive a hologram of a picture and drive the spatial light modulator to display the hologram on a group of pixels of the plurality of pixels. The driver is further configured to apply a series of phase offsets to the spatial light modulator displaying the hologram, wherein each phase offset of the series of phase offsets is applied to each pixel of the group of pixels for a respective predetermined period of time.

Abstract: There is provided a driver for a spatial light modulator comprising a plurality of pixels. The driver is configured to receive a hologram of a picture and drive the spatial light modulator to display the hologram on a group of pixels of the plurality of pixels. The driver is further configured to apply a series of phase offsets to the spatial light modulator displaying the hologram, wherein each phase offset of the series of phase offsets is applied to each pixel of the group of pixels for a respective predetermined period of time.

Abstract: There is provided a method for determining an intensity ratio of a holographic replay field. The method comprises forming a holographic replay field at a plane comprising a housing, wherein the holographic replay field comprises an image area and a non-image area. The method further comprises displaying a first feature at a first position of the holographic replay field. The method further comprises measuring an intensity IA of the first feature using a first light detector, wherein the first light detector is disposed on the housing. The method further comprises displaying a second feature at a second position of the holographic replay field, wherein the second feature is substantially identical to the first feature and forms a conjugate at the position of a second light detector. The second light detector is disposed on the housing. The method further comprises measuring an intensity IB? of the conjugate image of the second feature using the second light detector.

Abstract: A liquid crystal display device and corresponding method to display a hologram is described. A grey level value for each pixel of a hologram is received and a pixel voltage based on grey level for each pixel of the hologram is determined. The pixels of the display device are driven in accordance with a first representation of the pixel voltages during at least one first drive event. The pixels of the display device are driven in accordance a second representation of the pixel voltages during at least one second drive event after the at least one first drive event. The first representation may be an n-bit representation and the second representation may be a m-bit representation and n<m. The at least one first drive event may be shorter in duration than the at least one second drive event.

Abstract: An illumination system is arranged to output a light beam for illuminating a scene. The system comprises a spatial light modulator arranged to receive incident light, and to output light comprising a first component and a second component. The first component comprises incident light that is output without modulation by the spatial light modulator. The second component comprises incident light that is spatially-modulated according to a hologram and output by the spatial light modulator. A control device is operable to control the proportion of light output by the spatial light modulator that corresponds to the second component.

Abstract: There is provided a driver for a spatial light modulator comprising a plurality of pixels. The driver is configured to receive a hologram of a picture and drive the spatial light modulator to display the hologram on a group of pixels of the plurality of pixels. The driver is further configured to apply a series of phase offsets to the spatial light modulator displaying the hologram, wherein each phase offset of the series of phase offsets is applied to each pixel of the group of pixels for a respective predetermined period of time.

Abstract: There is provided a display device comprising a substrate; a spatial light modulator and a sealing element. The spatial light modulator is mounted on the substrate and comprises a light modulating region and an electrical connection region adjacent to the light modulating region. The sealing element comprises a primary portion comprising a first material and a secondary portion comprising a second material. The primary portion of the sealing element extends around at least a portion of a perimeter of the light modulating region and the secondary portion of the sealing element extends over the electrical connection region. The first material has a first coefficient of thermal expansion that is greater than a second coefficient of thermal expansion of the second material.

Abstract: A liquid crystal display device and corresponding method to display a hologram is described. A grey level value for each pixel of a hologram is received and a pixel voltage based on grey level for each pixel of the hologram is determined. The pixels of the display device are driven in accordance with a first representation of the pixel voltages during at least one first drive event. The pixels of the display device are driven in accordance a second representation of the pixel voltages during at least one second drive event after the at least one first drive event. The first representation may be an n-bit representation and the second representation may be a m-bit representation and n<m. The at least one first drive event may be shorter in duration than the at least one second drive event.

Abstract: A holographic projector and method of holographic projection is disclosed. A first array of light-modulating pixels displays a first hologram and a second array of light-modulating pixels displays second hologram. A first light source illuminates the first array of pixels such that a first holographic reconstruction, comprising a first zero-order replay field, is formed on a replay plane and a second light source illuminates the second array of pixels such that a second holographic reconstruction, comprising a second zero-order replay field, is formed on the replay plane. Real image content of the first holographic reconstruction is restricted to a first sub-area of the first zero-order replay field and real image content of the second holographic reconstruction is restricted to a first sub-area of the second zero-order replay field. The holographic projector is arranged such that the first zero-order replay field and the second zero-order replay field are no more than partially overlapping.

Abstract: A holographic projector and method of holographic projection is disclosed. A first array of light-modulating pixels displays a first hologram and a second array of light-modulating pixels displays second hologram. A first light source illuminates the first array of pixels such that a first holographic reconstruction, comprising a first zero-order replay field, is formed on a replay plane and a second light source illuminates the second array of pixels such that a second holographic reconstruction, comprising a second zero-order replay field, is formed on the replay plane. Real image content of the first holographic reconstruction is restricted to a first sub-area of the first zero-order replay field and real image content of the second holographic reconstruction is restricted to a first sub-area of the second zero-order replay field. The holographic projector is arranged such that the first zero-order replay field and the second zero-order replay field are no more than partially overlapping.

Abstract: An illumination system is arranged to output a light beam for illuminating a scene. The system comprises a spatial light modulator arranged to receive incident light, and to output light comprising a first component and a second component. The first component comprises incident light that is output without modulation by the spatial light modulator. The second component comprises incident light that is spatially-modulated according to a hologram and output by the spatial light modulator. A control device is operable to control the proportion of light output by the spatial light modulator that corresponds to the second component.