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Document Number
US Patent 4274217
Issued Date
June 23, 1981
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Abstract
This invention is directed to a display device comprising light reflecting block means having at least one light path defined by wall members for reflecting the light emitted from a light emitting diode placed within said light path which is provided with an elongated opening for constituting a display segment and composite lens means having a plurality of juxtaposed lens columns and Fresnel part, said composite lens means are located on the light reflecting block means so that the display segment can be illuminated with uniform and intensive brightness upon electrically activation of the light emitting diode.
Drawing
Display device - US Patent 4274217 Drawing
Drawing from US Patent 4274217
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Number of Claims:
15
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Published
June 23, 1981
Application Number
06/060,627
Filed
July 25, 1979
US Classification
40/451  
Int'l Classification
G09F   9/33   (20060101)  
Examiner
Assistant Examiner
Priority Data
Jul 25, 1978 [JP] 53-102858[U] Oct 30, 1978 [JP] 53-134888
USPTO Field of Search
40/451   40/450   340/383  
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Description
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