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
Dental composition, kit of parts and use thereof
Femtocell one-to-many packet delivery
Systems and methods for controlling registration of advancing substrates in absorbent article converting lines
Functionalized main chain polymers
Profiled rail for advertising/display units
Method and system for tracking mobile electronic devices while conserving cellular network resources
  Randomly Featured Patents
Channel plate multiplier having higher secondary emission coefficient near input
Common-mode voltage probe for predicting EMI from unshielded differential-pair cables
Recording/reproduction device
Apparatus, method and system for color measurement
Friction stir welding apparatus and method of operating same
Thermally neutral portable power sources
Scanning of a touch screen
Database for executing policies for controlling devices on a network
Air cleaner
Toner having crystalline wax