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
Image stabilization apparatus and image pickup apparatus
Automated measurement of concentration and/or amount in a biological sample
Motor assembly
Memory device and method for repairing a semiconductor memory
Clock phase recovery apparatus
Replacing memory pointers with implicit pointers to be used in compiler-generated debug output
System and method for text input with a multi-touch screen
  Randomly Featured Patents
Lumbar support actuation
Quick-coupling device for pipelines and the like
Ergonomic saddle chair
Devices and techniques for logical processing
Duct finishing machine
Paint bladder
Sound-insulating device for an induction machine
Flexible container with valve
Non-planar ring laser accelerometer
Magnetic recording medium