LED ARRAY LIGHT SOURCE

• Main Authors: SUETSUGU KENICHIRO, NISHIHARA MUNEKAZU, FUKUSHIMA TETSUO
• Format: Patent
• Language: English
• Published: 31.01.1992
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEMICONDUCTOR DEVICES

PURPOSE:To enable an entire illumination surface to be illuminated with a uniform quantity of light by providing a mask for adjusting the quantity of light where a light-screening pattern for screening light continuously is formed at a number of parts where there is much light at a front of an LED element. CONSTITUTION:A mask for adjusting quantity of light 40 is provided at a front of a sealing resin 30. This mask for adjusting the quantity of light 40 consists of a transparent and thin film and a light-screening pattern 44 which consists of a metal compound or other light-screening materials is formed on a surface at a side of the sealing resin 30 of the mask for adjusting quantity of light 40 due to deposition etc. When this light-screening pattern 44 can uniformize the quantity of light for the entire illumination surface by covering light at a part with much light continuous for distribution of quantity of light of an LED element 20, it can be executed in any pattern, thus preventing nonuniformity according to position of quantity of light to be irradiated reaching an illumination surface and achieving illumination with uniform quantity of light over an entire LED array light source.