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US 6,633,351 B2Granted
Optical functionality sheet, and planar light source and image display apparatus using the same sheet
AssigneesHitachi, Ltd., Nitto Denko Corporation
InventorsYasuo Hira, Toshihiko Ariyoshi
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Abstract
An optical functionality sheet provided with microlenses and a functional film (reflective film or light-blocking film/light-diffusing layer), with the above described functional film formed upon a patterned transparent conductive film. Thereby, self-alignment exposure using microlenses is made possible, and an optical functionality sheet with good directivity with respect to incident light, and good angle of visibility characteristics, can be realized.
Claims11
An optical functionality sheet, comprising:
- a transparent member that has microlenses on one surface;
- a transparent conductive film;
- and
- a white diffuse reflection film formed on said transparent conductive film;
- wherein said transparent conductive film is provided on a surface of said transparent member having no microlenses, and at least one of said transparent conductive film and said white diffuse reflection film is provided in areas other than the vicinity of the central axes corresponding to an optical axis of said microlenses;
- and
- light emitted via said microlenses in the light entering from a side of said white diffuse reflection film of said reflective member is converted to nearly parallel light.
4 more elements
Dependencies are inferred from the claim text.