Device for producing an image
AssigneeSiemens Aktiengesellschaft
InventorsHeinrich-Jochen Blume, Kai Hohmann, Heinrich Noll, Thomas Brohm, Ralf Mayer
Life of this patent
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Abstract
In a device for producing an image with a high light intensity by means of an image reproduction apparatus (9) which contains light valves, a light source comprising a light-emitting diode matrix (1, 2, 3) is provided for background lighting of the image reproduction apparatus (9). An optical device (5, 8, 10) for focussing and scattering the light which is produced by the light-emitting diodes (1) is arranged between the light source (1, 2, 3) and the image reproduction apparatus (9).
Claims20
A device for producing an image with an image reproduction apparatus (9) which contains light valves, characterized by the fact that a light source comprising a light-emitting diode matrix (1, 2, 3) is provided for background lighting of the image reproduction apparatus (9), and by the fact that an optical device for focussing and scattering the light produced by the light-emitting diodes is arranged between the light source and the image reproduction apparatus.
The device as claimed in one of the preceding claims, characterized by the fact that the matrix points are surrounded by in each case one reflector (3, 24).
The device as claimed in one of the preceding claims, characterized by the fact that the light valves have associated color filters (14) with different spectral passbands, with the passbands of the colored filters (14) being matched to the spectral light distribution of the light-emitting diodes (1).
The device as claimed in one of the preceding claims, characterized by the fact that the device for focussing and scattering comprises a reflector (5) which is in the form of a grid and forms a light channel for each matrix point, the walls (6) of which light channel are reflective.
The device as claimed in one of the preceding claims, characterized by the fact that a polarization filter (27) is arranged between the device for focussing and scattering (4, 5, 10) and the light source (1, 2, 3), passes light in one predetermined polarization direction, and reflects light in other polarization directions.
The device as claimed in one of the preceding claims, characterized by the fact that the reproduction apparatus, the light source (1, 2, 3) and the device for focussing and scattering (4, 5, 10) essentially occupy the same area.
The device as claimed in one of the preceding claims, characterized by the fact that the image reproduction apparatus (9) is a low-temperature polysilicon TFT display.
Dependencies are inferred from the claim text.