SECTION MEMBER, SURFACE LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY DEVICE

To suppress a section member from thermally shrinking in a surface light source which has the partition member.SOLUTION: A surface light source has a substrate, a plurality of light sources arranged on the substrate, and at least one section member arranged on the substrate. The section member has a plurality of first wall parts having a first ridge extending in a first direction, a plurality of second wall parts having a second ridge extending in a second direction crossing the first direction, and a section region including two opposite first wall parts and two opposite second wall parts, and is surrounded with the first ridge and second ridge in plan view. A plurality of section regions are arranged in the first direction and second direction, at least one first cut part is provided on at least one first ridge, and the light sources are arranged in the section regions respectively.SELECTED DRAWING: Figure 3 【課題】区画部材を有する面状光源において、区画部材の熱収縮を抑制する。【解決手段】本面状光源は、基板と、前記基板上に配置された複数の光源と、前記基板上に配置された少なくとも１つの区画部材と、を有し、前記区画部材は、第１方向に延在する第１稜線を有する複数の第１壁部と、前記第１方向と交差する第２方向に延在する第２稜線を有する複数の第２壁部と、対向する２つの前記第１壁部及び対向する２つの前記第２壁部を含み、平面視で前記第１稜線及び前記第２稜線に囲まれる区画領域と、を有し、前記区画領域は、前記第１方向及び前記第２方向に複数配置され、少なくとも１つの前記第１稜線上に、少なくとも１つの第１切り込み部が設けられ、前記光源は、前記区画領域内にそれぞれ配置される。【選択図】図３