The present invention provides a novel method to produce grade road base material using recycled oilfield waste, called \u201coil and gas waste,\u201d and aggregate waste and a novel road base material. More specifically, we have now found that liposomes or nonionic surfactant vesicles can be formed which are storage-stable and possess an affinity for hair. The method includes forming the wavelength conversion layer within the cavity, which can include applying and hardening a first material to form a first wavelength conversion layer on the light emitting element, and applying and hardening a second material to substantially fill the remainder of the entire cavity, thereby forming a second wavelength conversion layer. The trailing shield has on the trailing side a portion where film thickness is thinner on the trailing side than the thickness of its element in the height direction in its position facing the main magnetic pole. Thus, the present invention provides a display device to which common voltage is applied effectively. A plurality of surface-attached geometric objects is generated that replaces all of the particles and the second plurality of curves.