The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2014
Filed:
Feb. 13, 2009
Ho Joong Kang, Seoul, KR;
Seung Gyu Lee, Seoul, KR;
Sang Sik Jeong, Seoul, KR;
OH Jin Kweon, Seoul, KR;
Ho Joong Kang, Seoul, KR;
Seung Gyu Lee, Seoul, KR;
Sang Sik Jeong, Seoul, KR;
Oh Jin Kweon, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A projection display device () capable of providing a virtual keyboard function to the user, using a light source of a pico projector, is discussed. According to an embodiment, the projection display device includes a light source unit () configured to emit lights; a light combining unit () configured to generate a leakage light from the lights emitted by the light source () unit and to selectively combine the lights from the light source unit (); an image projection unit () configured to project an image using the combined light from the light combining unit (); and a virtual input unit () configured to project an input unit image () using the leakage light from the light combining unit ().