Optical module, backlight control method and display device

The invention provides an optical module comprising a polarizing film used for converting incident light into first polarized light with a first polarization state and second polarized light with a second polarization state; the phase delay layer is used for converting the first polarized light and the second polarized light into third polarized light comprising a third polarization state and fourth polarized light comprising a fourth polarization state; the first polarization state is different from the second polarization state; the phase retardation layer includes a control layer including one or more control elements. The optical module can be used for the display device. According to the technical scheme, the display effect of the display device can be improved, the utilization rate of effective polarized light of the backlight module is increased, and then the power consumption of the display device is reduced. 本申请提供了一种光学模组，包括：偏振膜，用于将入射光线转换成具有第一偏振态的第一偏振光和具有第二偏振态的第二偏振光；相位延迟层，用于将第一偏振光和第二偏振光转换为包括第三偏振态的第三偏振