Patent ID: 8552965
Filing Date: 2013-10-08
Classification: G02F,G09G

Abstract:
1. A display device, comprising: a display panel; a backlight source disposed on a back face of the display panel along the display panel; a front-face side light source which is disposed in front of a front-face side of the display panel, and which irradiates light toward the front-face side of the display panel from an oblique direction; and a diffusive reflection part, provided on the front-face side of the display panel between the front-face side light source and the front-face side of the display panel, which diffusively reflects light irradiated from the front-face side light source and transmits light from the backlight source transmitted through the display panel, wherein the backlight source comprises a light-flux control device which collimates the light output from the backlight source, and a transparent-diffusion control element that includes liquid crystal that is electrically switchable between a transparent state in which the collimated light is transmitted without a change in directivity and a scattering state in which the collimated light is diffused, and wherein the display device further comprises a control part which controls each of the backlight source, the front-face side light source, and the transparent-diffusion control element in association with each other to switch between a narrow view field mode and a wide view field mode.