Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ying-Tsung Lu0
Ching-Chin Wu0
Date of Patent
June 9, 2009
0Patent Application Number
108687870
Date Filed
June 17, 2004
0Patent Primary Examiner
Patent abstract
A virtual input element image projection apparatus couples a suitable lens and an optical element to increase the diverging angle of a virtual input element image or generate a plurality of portions of the virtual input element image that are coupled to form the complete virtual input element image without reducing diffraction efficiency. The projection distance for generating the virtual input element image may also be shortened.
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