NOVELTY - A waste material of flat panel displays (AA), e.g. liquid-crystal panel, liquid crystal panel, organic electroluminescent panel, plasma display, cathode ray tube, fluorescent-tube glass (MM) and/or solar cell panel are pulverized (BB), resultant pulverized particles are dissolved in aqueous hydrofluoric acid solution (CC), resultant solution is filtered and removed metal oxides, metal fluorides and metals. The filtrate containing metal ions (EE) is electrolyzed, precipitated, and recovered useful metals.    USE - Recycling of useful metals such as indium, zinc, silver, tin, rare earth metal such as yttrium, europium, lanthanum, terbium and gadolinium, antimony, lead, and copper from waste material of waste material of flat panel displays, e.g. liquid-crystal panel, organic electroluminescent panel and plasma display, cathode ray tube, fluorescent-tube glass, solar cell, integrated circuit, printed circuit board, vehicle-mounted copper wiring harness, power cable, power-transmission wires and service wires, coaxial cable, twin lead type feeder, and other copper wirings (all claimed).    ADVANTAGE - The method of economically recycles useful metals with reduced energy consumption.    DETAILED DESCRIPTION - A waste material of flat panel displays, e.g. liquid-crystal panel, liquid crystal panel, organic electroluminescent panel, plasma display, cathode ray tube, fluorescent-tube glass and/or solar cell panel are pulverized, resultant pulverized particles are dissolved in aqueous hydrofluoric acid solution, resultant solution is filtered and removed metal oxides, metal fluorides and metals. The filtrate containing metal ions is electrolyzed, precipitated, and recovered useful metals. The pulverized particles are dissolved using aqueous hydroiodic acid solution, aqueous nitric acid solution, aqueous hydrochloric acid and/or aqueous sulfuric acid solution, and using aqueous hydroiodic acid solution and hydrogen peroxide.    DESCRIPTION OF DRAWING(S) - The drawing shows flowchart illustrating recycling of useful metals. (Drawing includes non-English language text).    Abandoned flat panel display (AA)    Pulverizing (BB)    Dissolve in aqueous hydrofluoric acid solution (CC)    Aqueous solution containing metal ions (EE)    Abandoned cathode ray tube and fluorescent tube (MM)