Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 23, 2010
Patent Application Number
12280036
Date Filed
September 29, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention provides a light emitting keypad having a very slim light guide film, and a light guide film for a keypad backlight. Particularly, a reflection layer is formed on a lower portion of the light guide film, resulting in more improved luminance. According to the present invention, the introduction of an EL sheet is eliminated, substantial slimness is achieved as compared with a direct illumination type keypad, high luminance is obtained by introducing a reflection layer even though a small number of light sources are used, and a light emitting surface can be provided for intensive light emission onto key regions of a keypad by forming a predetermined pattern on at least one surface of the light guide film.
Timeline
No Timeline data yet.
Further Resources
No Further Resources data yet.
