Claims
- 1. A lighting unit comprisinga plurality of linear or bar-shaped light sources arranged in parallel, a light-guiding plate having a plurality of grooves to accommodate said light sources, a light diffuse reflection means provided at either one side of said light-guiding plate, a first light diffusion means provided at the side opposite to that which faces the light diffuse reflection means of the light-guiding plate, and a light semi-transmitting reflection means provided between each light source and said light diffusion means, wherein said lighting unit is characterized in that a second light diffusion means is further located with a clearance at the side opposite to that which faces the light-guiding plate of the first light diffusion means.
- 2. A lighting unit comprisinga plurality of linear or bar-shaped light sources arranged in parallel, light-guiding plates arranged along both longitudinal sides of said light sources, a light diffuse reflection means provided at either one side of each of said light-guiding plates, a first light diffusion means provided at the side opposite to that which faces the light diffuse reflection means of each light-guiding plate, and a light semi-transmitting reflection means provided between each light source and said light diffusion means, wherein said lighting unit is characterized in that a second light diffusion means is further located with a clearance at the side opposite to that which faces the light-guiding plate of the first light diffusion means.
- 3. A lighting unit comprisinga plurality of linear or bar-shaped light sources arranged in parallel, light-guiding plates arranged along both longitudinal sides of said light sources, a light diffuse reflection means provided at either one side of each of said light-guiding plates, a first light diffusion means provided at the side opposite to that which faces the light diffuse reflection means of each light-guiding plate, and a light semi-transmitting reflection means provided between each light source and said light diffusion means, wherein said lighting unit is characterized in that each of said light-guiding plates has a cross section made of laminated wedge-type plate-shaped members.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-268374 |
Aug 2000 |
JP |
|
Parent Case Info
This is a continuation of U.S. application Ser. No. 09/808,942, filed Mar. 16, 2001, now U.S. Pat. No. 6,561,663, the subject matter of which is incorporated by reference herein.
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Continuations (1)
|
Number |
Date |
Country |
Parent |
09/808942 |
Mar 2001 |
US |
Child |
10/403057 |
|
US |