A liquid crystal display device, LCD, having a front side and a rear side for selectively displaying and viewing an image either on the front side or on the rear side of the device, said liquid crystal display comprises: a transmissive liquid crystal panel having a front side and a rear side corresponding to the front side and the rear side of the liquid crystal display device; a front light unit placed in front of the transmissive liquid crystal panel and providing light for image display; a light control unit including one single Polymer-Dispersed Liquid Crystal, PDLC, and placed at the rear of the transmissive liquid crystal panel for reflecting or transmitting incident light; wherein the transmissive liquid crystal panel comprises: a first substrate provided at the rear side of the transmissive liquid crystal panel; a second substrate provided at a position facing the first substrate at the front side of the transmissive liquid crystal panel; a liquid crystal layer filled between the first substrate and the second substrate; a first polarization plate placed between the light control unit and the first substrate; a second polarization plate placed between the front light unit and the second substrate, and a microlens sheet placed between the front light unit and the second polarization plate, wherein the image is displayed in a first mode in which, the single PDLC of the light control unit reflects the incident light when a voltage is not applied, so that the light control unit reflects light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the front side of the transmissive liquid crystal panel, and in a second mode in which, the single PDLC of the light control unit transmits incident light when a voltage is applied thereto so that the light control unit transmits light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the rear side of the transmissive liquid crystal panel. a transmissive liquid crystal panel having a front side and a rear side corresponding to the front side and the rear side of the liquid crystal display device; a front light unit placed in front of the transmissive liquid crystal panel and providing light for image display; a light control unit including one single Polymer-Dispersed Liquid Crystal, PDLC, and placed at the rear of the transmissive liquid crystal panel for reflecting or transmitting incident light; wherein the transmissive liquid crystal panel comprises: a first substrate provided at the rear side of the transmissive liquid crystal panel; a second substrate provided at a position facing the first substrate at the front side of the transmissive liquid crystal panel; a liquid crystal layer filled between the first substrate and the second substrate; a first polarization plate placed between the light control unit and the first substrate; a second polarization plate placed between the front light unit and the second substrate, and a microlens sheet placed between the front light unit and the second polarization plate, wherein the image is displayed in a first mode in which, the single PDLC of the light control unit reflects the incident light when a voltage is not applied, so that the light control unit reflects light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the front side of the transmissive liquid crystal panel, and in a second mode in which, the single PDLC of the light control unit transmits incident light when a voltage is applied thereto so that the light control unit transmits light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the rear side of the transmissive liquid crystal panel. a first substrate provided at the rear side of the transmissive liquid crystal panel; a second substrate provided at a position facing the first substrate at the front side of the transmissive liquid crystal panel; a liquid crystal layer filled between the first substrate and the second substrate; a first polarization plate placed between the light control unit and the first substrate; a second polarization plate placed between the front light unit and the second substrate, and a microlens sheet placed between the front light unit and the second polarization plate, wherein the image is displayed in a first mode in which, the single PDLC of the light control unit reflects the incident light when a voltage is not applied, so that the light control unit reflects light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the front side of the transmissive liquid crystal panel, and in a second mode in which, the single PDLC of the light control unit transmits incident light when a voltage is applied thereto so that the light control unit transmits light emitted by the front light unit and transmitted through the transmissive liquid crystal panel, thereby displaying the image on the rear side of the transmissive liquid crystal panel.