| 摘要 |
The present invention relates to a lighting device using a double optical sheet. The lighting device comprises: a light source; a reflective sheet to waveguide light irradiated from the light source to a light facing part from a light entry part; a first optical sheet which is located at a light exit part facing to the reflective sheet, and includes a first base layer and a first pattern layer formed on the upper part of the first base layer; and a second optical sheet which is formed on the first pattern layer of the first optical sheet, and includes a second base layer and a second pattern layer formed on the upper part of the second base layer. According to the present invention, the lighting device includes the double optical sheet having the pattern layers formed on the light exit part, thereby improving light condensing power, maintaining uniformity of an optical speed, solving visible displeasure and an amblyopia problem due to glare of lighting, and minimizing a reduce of optical speed efficiency. |
