Resources Contact Us Home
Surface light source element and liquid crystal display device, sign device and traffic control sign device using same

Image Number 4 for United States Patent #6099135.

A surface light source device, comprising a light source (2); a light conductor (1) which has a light incident face (11) on at least one side end surface thereof which confronts the light source (2), and a light emitting face (12) on one surface thereof which is substantially perpendicular to the light incident face (11); and a light angle varying sheet (3) which is disposed at a side of the light emitting face (12) of the light conductor (1), wherein at least one of the light emitting face (12) and a back surface (13) of the light conductor (1) comprises a minute structure having an average slant angle of 0.5 to 7.5 degrees. The light angle varying sheet (3) may comprise a prism sheet having a plurality of prisms (31) which are formed parallel to one another on at least one surface thereof. The minute structure may comprise a roughened surface which includes a plurality of fine convex members each having a substantially spherical surface or a plurality of prism arrays having slant surfaces which extend parallel to said light incident face (11) and which have an average slant angle of 0.5 to 7.5 degrees.

  Recently Added Patents
Frame timing synchronization in a geostationary satellite system
Self-diagnostic method and system for implantable cardiac device
Markers of acute myeloid leukemia stem cells
Quinoline compounds and their use for treating viral infection
Method and apparatus for networked modems
Architectural panel with natural fossil spade leaf embossed surface
Phase noise extraction apparatus and technique
  Randomly Featured Patents
Job processing apparatus
Apparatus and method for manufacturing a container from a thermoplastic resin foam sheet
Column defect detection in a content addressable memory
Two-way nesting container for liquids
Remote control for a speaker
Level measurement method using measurements of water column pressure therefor
Semiconductor device and method for manufacturing semiconductor device
Catalytic converter for purifying gases from an internal combustion engine
Charging method and charging structure of combustible gas and oxidizer gas, and material to be charged by using the charging method and the charging structure
Method of manufacturing lens, injection mold for molding of lens, and molded lens