Anti-peeping control device and backlight module and display using same

A backlight module, comprising an optical plate, a light source and an anti-peeping control device, wherein

• the anti-peeping control device comprises a first polarizer, a second polarizer and a liquid crystal box, wherein
• the first polarizer comprises a first transmission axis having a first axial direction;
• the second polarizer is disposed opposite to the first polarizer, the second polarizer comprises a second transmission axis having a second axial direction, a relationship between the first transmission axis and the second transmission axis satisfies at least one of the following conditions:
• (1) an included angle is formed between the first axial direction and the second axial direction, and the included angle is between 5 degrees and 15 degrees;
• and (2) the first axial direction is parallel to the second axial direction, the first axial direction is not parallel and not perpendicular to any side edge of the first polarizer, and the second axial direction is not parallel and not perpendicular to any side edge of the second polarizer;
• the liquid crystal box is disposed between the first polarizer and the second polarizer, the liquid crystal box comprises a first alignment layer, a second alignment layer and a liquid crystal material, the liquid crystal material is disposed between the first alignment layer and the second alignment layer, an included angle between a first alignment direction of the first alignment layer and the first axial direction is selected from one of 0±5 degrees and 90±5 degrees, and an included angle between a second alignment direction of the second alignment layer and the second axial direction is selected from one of 0±5 degrees and 90±5 degrees;
• the optical plate has a light incident surface and a light emitting surface;
• the light source is disposed on a side of the light incident surface;
• the anti-peeping control device is disposed opposite to the light emitting surface of the optical plate, and the first polarizer faces the optical plate.

A display, comprising a display panel and a backlight module, wherein

• the backlight module comprises an optical plate, a light source and an anti-peeping control device, wherein
• the anti-peeping control device comprises a first polarizer, a second polarizer and a liquid crystal box, wherein
• the first polarizer comprises a first transmission axis having a first axial direction;
• the second polarizer is disposed opposite to the first polarizer, the second polarizer comprises a second transmission axis having a second axial direction, a relationship between the first transmission axis and the second transmission axis satisfies at least one of the following conditions:
• (1) an included angle is formed between the first axial direction and the second axial direction, and the included angle is between 5 degrees and 15 degrees;
• and (2) the first axial direction is parallel to the second axial direction, the first axial direction is not parallel and not perpendicular to any side edge of the first polarizer, and the second axial direction is not parallel and not perpendicular to any side edge of the second polarizer;
• the liquid crystal box is disposed between the first polarizer and the second polarizer, the liquid crystal box comprises a first alignment layer, a second alignment layer and a liquid crystal material, the liquid crystal material is disposed between the first alignment layer and the second alignment layer, an included angle between a first alignment direction of the first alignment layer and the first axial direction is selected from one of 0±5 degrees and 90±5 degrees, and an included angle between a second alignment direction of the second alignment layer and the second axial direction is selected from one of 0±5 degrees and 90±5 degrees;
• the optical plate has a light incident surface and a light emitting surface;
• the light source is disposed on a side of the light incident surface;
• the anti-peeping control device is disposed opposite to the light emitting surface of the optical plate, and the first polarizer faces the optical plate;
• the display panel comprises a panel module;
• the display panel is disposed on a side of the anti-peeping control device away from the optical plate or between the optical plate and the anti-peeping control device.