| abstract |
In an edge type backlight unit having a remote phosphor structure, even when a thermoplastic resin is used as a sealing material in a phosphor layer, problems such as thermal deterioration and thermal deformation of the sealing material can be prevented. Provided are a wavelength conversion member, a light conversion light guide unit, a light source device, and a display device. A wavelength conversion member that converts the wavelength of at least part of incident light and emits outgoing light having a wavelength different from that of the incident light, the phosphor layer including at least a phosphor and a sealing material, And a transparent heat sink member bonded to at least one of the main surfaces of the phosphor layer. [Selection] Figure 3 |