Method of forming projecting film

By establishing a projecting part control method that enables the same application liquid to be used for a plurality of different scattering property requirements, there is provided a method of forming a projecting film according to which an increase in the number of times of preparing an application liquid and the frequency of replacing the application liquid can be suppressed, and hence the uptime ratio of coating equipment can be prevented from dropping, and thus the manufacturing cost can be reduced. The method of forming a projecting film comprises a formation step of applying a sol-form application liquid comprising at least one film component and at least two solvents onto a glass substrate 20 to form an applied layer 41, a phase separation step of drying the applied layer 41 to selectively remove at least one of the solvents that acted effectively to homogenize the applied layer 41, thus carrying out phase separation between at least one of the solvents that acts effectively to cause phase separation and at least one of the film components, or between a plurality of the film components, by utilizing a difference in surface tension between at least one of the solvents that acts effectively to cause phase separation and at least one of the film components, or between a plurality of the film components, and a gelation step of removing the solvents to gelate the film components. The drying temperature in the drying of the applied layer 41 is controlled within a range of 200 to 500° C., and the drying time is controlled within a range of 1 minute to 24 hours.