A viewing angle control device (12, 22, 32, 42), comprising: at least one liquid crystal panel, wherein each of the at least one liquid crystal panel comprises two transparent conductive layers (1211, 1212) and a plurality of liquid crystal molecules located between the transparent conductive layers (1211, 1212); at least one compensation film, parallel to and overlapped with the at least one liquid crystal panel; and a plurality of polarizers, comprising: at least one first polarizer, arranged parallel to and overlapped with each of the at least one compensation film and the at least one liquid crystal panel; and a second polarizer, parallel to, overlapped with, and located on the same side of, i.e. either above or below, all of the at least one liquid crystal panel, the at least one compensation film and the at least one first polarizer, wherein when there is no potential difference between the transparent conductive layers (1211, 1212), an optical axis of each of the liquid crystal molecules is parallel or perpendicular to a transmission axis of the at least one first polarizer, when there is potential difference between the transparent conductive layers (1211, 1212), the optical axis of each of the liquid crystal molecules is inclined with respect to the transmission axis or an absorption axis of the at least one first polarizer, wherein each of the at least one compensation film is selected from the group consisting of an O-plate and a C-plate, characterized in that the at least one first polarizer is located between the at least one compensation film and the at least one liquid crystal panel. at least one liquid crystal panel, wherein each of the at least one liquid crystal panel comprises two transparent conductive layers (1211, 1212) and a plurality of liquid crystal molecules located between the transparent conductive layers (1211, 1212); at least one compensation film, parallel to and overlapped with the at least one liquid crystal panel; and a plurality of polarizers, comprising: at least one first polarizer, arranged parallel to and overlapped with each of the at least one compensation film and the at least one liquid crystal panel; and a second polarizer, parallel to, overlapped with, and located on the same side of, i.e. either above or below, all of the at least one liquid crystal panel, the at least one compensation film and the at least one first polarizer, wherein when there is no potential difference between the transparent conductive layers (1211, 1212), an optical axis of each of the liquid crystal molecules is parallel or perpendicular to a transmission axis of the at least one first polarizer, when there is potential difference between the transparent conductive layers (1211, 1212), the optical axis of each of the liquid crystal molecules is inclined with respect to the transmission axis or an absorption axis of the at least one first polarizer, wherein each of the at least one compensation film is selected from the group consisting of an O-plate and a C-plate, at least one first polarizer, arranged parallel to and overlapped with each of the at least one compensation film and the at least one liquid crystal panel; and a second polarizer, parallel to, overlapped with, and located on the same side of, i.e. either above or below, all of the at least one liquid crystal panel, the at least one compensation film and the at least one first polarizer, wherein when there is no potential difference between the transparent conductive layers (1211, 1212), an optical axis of each of the liquid crystal molecules is parallel or perpendicular to a transmission axis of the at least one first polarizer, when there is potential difference between the transparent conductive layers (1211, 1212), the optical axis of each of the liquid crystal molecules is inclined with respect to the transmission axis or an absorption axis of the at least one first polarizer, wherein each of the at least one compensation film is selected from the group consisting of an O-plate and a C-plate, characterized in that the at least one first polarizer is located between the at least one compensation film and the at least one liquid crystal panel.