Collimating lens, collimating system, and image displaying apparatus using collimating system
AssigneeSamsung Electronics Co., Ltd.
InventorJu-Seong Hwang
Life of this patent
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Abstract
A collimating lens and a collimating system which condense light emitted from a light source with directivity at a high efficiency and a projection type image displaying apparatus using the same. The collimating system includes a light source having at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted and a collimating lens including at least one prism portion having an exit surface sloping at a prism angle corresponding to the dominant emitting angle.
Claims30
A collimating system comprising:
- a light source having at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted;
- and
- a collimating lens including at least one prism portion having an exit surface sloping at a prism angle corresponding to the dominant emitting angle.
A collimating system comprising:
- a light source having at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted;
- and
- a diffracting optical element including at least one sectional region having a grating spacing corresponding to the dominant emitting angle.
An image displaying apparatus comprising:
- a plurality of light sources, each of which has at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted;
- a plurality of collimating lenses, each of which includes at least one prism portion having an exit surface sloping at a prism angle corresponding to the dominant emitting angle of the respective light source;
- a light combining unit which transmits or reflects parallel incident light from each of the collimating lenses according to a wavelength of the parallel incident light so as to emit light along a single optical path;
- a display unit which processes the light incident from the light combining unit according to an input image signal to form an image;
- and
- a projection lens unit which magnifies and projects the image formed by the display unit.
A collimating lens collimating light emitted from a light source having at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted, the collimating lens comprising at least one prism portion having an exit surface sloping at a prism angle corresponding to the dominant emitting angle of the light source.
A diffracting optical element collimating light emitted from a light source having at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted, the diffracting optical element comprising at least one sectional region having a grating spacing corresponding to the dominant emitting angle of the light source.
An image displaying apparatus comprising:
- a plurality of light sources, each of which has at least one dominant emitting angle at which light having a relatively great intensity distribution is emitted;
- a plurality of diffracting optical elements, each of which includes at least one sectional region having a grating spacing corresponding to the dominant emitting angle of the respective light source;
- a light combining unit which transmits or reflects parallel incident light from each of the collimating lenses according to a wavelength of the parallel incident light so as to emit light along a single optical path;
- a display unit which processes the light incident from the light combining unit according to an input image signal to form an image;
- and
- a projection lens unit which magnifies and projects the image formed by the display unit.
Dependencies are inferred from the claim text.