LIGHT TRANSMISSION PLATE AND SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE USING THE LIGHT TRANSMISSION PLATE,申请号JP19990008220-传众专利搜索

LIGHT TRANSMISSION PLATE AND SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE USING THE LIGHT TRANSMISSION PLATE

申请公布号：JP2000206526(A)

申请号：JP19990008220

申请日期：1999.01.14

申请公布日期：2000.07.28

申请人：

SANYO ELECTRIC CO LTD

发明人：MABUCHI KOJI

分类号：G09F9/00;F21V8/00;G02B6/00;G02F1/1335;G02F1/13357

主分类号：G09F9/00

摘要：PROBLEM TO BE SOLVED: To provide a light transmission plate in which abnormal diffusion of light in a part where a reflection sheet is fixed can be suppressed and uniform luminance can be obtd. without requiring a special double face adhesive tape, and to provide a surface light source device and a display device without irregular luminance by using this light transmission plate. SOLUTION: Plural recesses 14 are formed in a fixing region S where a reflection sheet 3 is to be fixed, and a reflection sheet 3 is fixed in this fixing region S by using a double face tape 4. Thereby, unnecessary diffusion in the surface part of the light transmission plate in contact with the double tape 4 is suppressed, such irregular luminance that a part of the light emitting face 12 is excessively bright can be prevented, and uniform luminance can be obtd. By using this light transmission plate, a surface light source device having good illumination performance or a display device having excellent display performance can be obtd.