Light ray direction controlling device and display device
AssigneeTianma Japan, Ltd.
InventorHidenori IKENO
Life of this patent
Estimating the term…
Abstract
A light ray direction controlling device includes: a plurality of louver elements switching between a transparent state and a light absorption state in accordance with an applied voltage, and a plurality of polymer dispersed liquid crystal parts arranged along the primary surface of the substrate between the plurality of louver elements, respectively. The polymer dispersed liquid crystal parts each includes a solid polymer resin part and liquid crystal drops dispersed in the solid polymer resin part. The polymer dispersed liquid crystal parts each changes a degree of scattering of exiting light by changing a degree of scattering of incident light in accordance with an applied voltage.
Claims11
A light ray direction controlling device that can change a range of an emission angle of light that is incident on a light incident surface and exits from a light exiting surface, the light ray direction controlling device comprising:
- a substrate;
- a plurality of louver elements arranged along a primary surface of the substrate, the louver elements each rising up in a direction from the light incident surface toward the light exiting surface, the louver elements each extending along the primary surface of the substrate and switching between a transparent state and a light absorption state in accordance with an applied voltage;
- a plurality of polymer dispersed liquid crystal parts arranged along the primary surface of the substrate between the plurality of louver elements, respectively, the polymer dispersed liquid crystal parts each including a solid polymer resin part and liquid crystal drops dispersed in the solid polymer resin part, the polymer dispersed liquid crystal parts each changing a degree of scattering of exiting light by changing a degree of scattering of incident light in accordance with an applied voltage;
- a plurality of pairs of polymer dispersed liquid crystal part driving electrodes each arranged so as to sandwich one of the polymer dispersed liquid crystal parts and giving a driving voltage to the sandwiched one of the polymer dispersed liquid crystal parts;
- and
- a plurality of pairs of louver element driving electrodes each arranged so as to sandwich one of the plurality of louver elements and giving a driving voltage to the sandwiched one of the plurality of louver elements.
A display device, comprising:
- a display panel;
- a backlight module that emits planar light;
- and
- a light ray direction controlling device that is disposed between the backlight module and the display panel, the light ray direction controlling device changing a range of an emission angle of light that is incident on a light incident surface and that exits from a light exiting surface,
- wherein the light ray direction controlling device includes:
- a substrate;
- a plurality of louver elements arranged along a primary surface of the substrate, the louver elements each rising up in a direction from the light incident surface toward the light exiting surface, the louver elements each extending along the primary surface of the substrate and switching between a transparent state and a light absorption state in accordance with an applied voltage;
- a plurality of polymer dispersed liquid crystal parts arranged along the primary surface of the substrate between the plurality of louver elements, respectively, the polymer dispersed liquid crystal parts each including a solid polymer resin part and liquid crystal drops dispersed in the solid polymer resin part, the polymer dispersed liquid crystal parts each changing a degree of scattering of exiting light by changing a degree of scattering of incident light in accordance with an applied voltage;
- a plurality of pairs of polymer dispersed liquid crystal part driving electrodes each arranged so as to sandwich one of the polymer dispersed liquid crystal parts and giving a driving voltage to the sandwiched one of the polymer dispersed liquid crystal parts;
- and
- a plurality of pairs of louver element driving electrodes each arranged so as to sandwich one of the plurality of louver elements and giving a driving voltage to the sandwiched one of the plurality of louver elements.
Dependencies are inferred from the claim text.