LIGHT CONTROL SHEET AND SURFACE LIGHT EMITTING DEVICE HAVING THE SAME

摘要

PURPOSE: To provide a light control sheet which is hard to be flawed and substantially prevented from the pickup of foreign matter by static electricity and a surface eight emitting device having the same. CONSTITUTION: A single layer sheet 11 of the light control sheet 10 is internally provided with many air layers 12 having an approximately triangular shape in the longitudinal cross-section and constant directivity. These air layers 12 have the approximately triangular shape in the longitudinal cross-section and are preferably formed so that the base of the triangular shapes exist on the upper side and the vertex angle on the lower side. The vertex angle αthereof is preferably in a range of 70 deg.<=α<=110 deg.. The length 1 of one side is preferably <=150μm. The respective vertex angles or circuit sides of the approximately triangular shape in the longitudinal cross-section may be provided with roundness. The spacings between the adjacent air layers 12 are preferably >=5μm. The surface light emitting device has the light control sheet 10.