Abstract: A viewing angle switchable display device can include a display panel including a plurality of sub-pixels, where each sub-pixel has a first emission area and a second emission area. The display device can further include a lens over the display panel and corresponding to the second emission area, wherein a size of the second emission area is smaller than a size of the first emission area.

Abstract: Malodorous gases such as amines, organosulfur compounds, hydrogen sulfide, styrene and aldehydes are economically and efficiently treated at ambient temperature and pressure by a catalytic absorption and oxidation process comprising: (a) bringing the malodorous gases into contact with a scrubbing water containing a heterogeneous catalyst to absorb the malodorous components catalytically, and (b) subjecting the resulting solution containing the malodorous components to a catalytic oxidation by contacting it with an oxidizing agent such as hydrogen peroxide, ozone, oxygen, air, nitrogen oxides, and NaOCl in the presence of the catalyst at a temperature ranging from 0 to 100 □ under an ambient pressure, the heterogeneous catalyst comprising an active metal element selected from alkali, alkaline earth and transition metals, and an oxide support material.

Abstract: Wastewater streams containing various pollutants are economically and efficiently treated at ambient temperature and pressure with hydrogen peroxide, oxygen or ozone in the presence of a heterogeneous catalyst comprising an element selected from the group consisting of Ni, Ru, Co, Fe, Cu, Mn, Li and a mixture thereof supported on a metal oxide selected from the group consisting of MgO, CaO, SnO2, PbO and a mixture thereof.