| 摘要 |
PROBLEM TO BE SOLVED: To uniformly radiate light over an entire side surface, to effectively use the light, and to reduce cost, by providing a thin film having a pattern formed with a material that can reflect the light on the front surface side of a light source, and making the thin film from a synthetic resin capable of transmitting the light. SOLUTION: The front surface side (upside in the figure) of a light source 51 is adhered with an adhesive seal serving as a thin film made of a synthetic resin such as a light-transmittable polyester transparent sheet, namely, the adhesive seal is adhered for forming a mirror for total reflection and a pattern 60 with a color for total reflection or irregular reflection of light such as white for irregular reflection. For forming the pattern 60 on the thin film, for example, aluminum or silver is applied to the entire thin film in a vacuum deposition method or a thermal transcription method, and the aluminum film or the silver film is removed only within a range for transmitting the light by etching with a series of a photolithography technology.
|
