A display device, comprising a driving circuit and a display module, the driving circuit being configured to drive the display module, wherein the display module comprises a display panel, a backlight module, an upper polarizer, and a lower polarizer;
- wherein the upper polarizer is arranged on a light emitting surface of the display panel, and the lower polarizer is arranged on a light incident surface of the display panel;
- wherein an absorption axis of the upper polarizer is not identical with an absorption axis of the lower polarizer;
- wherein a light emitting surface of the backlight module is disposed adjacent to the light incident surface of the display panel;
- wherein the display module further comprises a light valve regulator arranged between the light incident surface of the display panel and the light emitting surface of the backlight module, wherein the light valve regulator comprises a first regulating electrode, a first viewing angle control layer, a second viewing angle control layer, a second regulating electrode, and a first polarizer;
- wherein the first regulating electrode is arranged adjacent to the display panel;
- wherein the first viewing angle control layer is disposed on a side of the first regulating electrode facing away from the display panel, wherein the first viewing angle control layer comprises a light focusing layer and a first liquid crystal layer that are alternately arranged;
- wherein the second viewing angle control layer is disposed on a side of the first viewing angle control layer facing away from the first regulating electrode, and wherein the second viewing angle control layer comprises a transparent layer and a second liquid crystal layer that are alternately arranged;
- wherein the second regulating electrode is arranged on a side of the second viewing angle control layer facing away from the first viewing angle control layer, and wherein the second regulating electrode and the first regulating electrode are operative to form an electric field used for controlling the first liquid crystal layer and the second liquid crystal layer;
- wherein the first polarizer is disposed on a side of the second regulating electrode facing away from the second viewing angle control layer, and wherein an absorption axis of the first polarizer is identical with the absorption axis of the upper polarizer;
- wherein in response to the first regulating electrode and the second regulating electrode being energized, the liquid crystal molecules in the first liquid crystal layer of the first viewing angle control layer and the second liquid crystal layer of the second viewing angle control layer are rotated, and light emitted by the backlight module passes through the light valve regulator before all entering the display panel;
- in response to the first regulating electrode and the second regulating electrode being not energized, the liquid crystal molecules in the first liquid crystal layer of the first viewing angle control layer and the second liquid crystal layer of the second viewing angle control layer are positioned in an initial state, and the light emitted by the backlight module is partially emitted into the display panel after passing through the light valve regulator;
- wherein the light focusing layer comprises a transparent substrate, wherein a hollow hole is defined in the transparent substrate, wherein the hollow hole comprises an opening that is located on a side of the transparent substrate adjacent to the first regulating electrode, and wherein the hollow hole comprises a side wall that has an arc shape;
- wherein the transparent substrate is operative to focus the light that vertically enters the light focusing layer to the opening and allow the light to be emitted.