Phosphor film, lighting device using the same, and display device
First Claim
1. A lighting device, comprising:
- a light source;
phosphor particles that are excited by light from the light source and emit light having a wavelength different from that of the light from the light source;
a light guide that propagates the light from the light source and irradiates the light in a plane shape; and
a phosphor layer formed by mixing the phosphor particles in a binder, wherein the phosphor layer is sandwiched between a translucent film and a non-permeable layer.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention realizes a phosphor film that has a fluorescent characteristic excellent in resistance to humidity and provides, using the phosphor film, a liquid crystal display device that is excellent in resistance to humidity and has satisfactory calorimetric property and color mixture property. Phosphor particles that are excited by incident light and emit light having a wavelength different from the incident light are mixed in a binder. The binder mixed with the phosphor particles is sandwiched between a translucent film and a non-permeable layer as a phosphor layer to form a phosphor film. This phosphor film is provided at least in one place among a place between a light source and a light guide of a lighting device, a place on a light irradiation surface of the light guide, and a place between the light guide and a reflection plate. Moreover, the phosphor particles have a characteristic that a wavelength absorbed by a color filter of a display element is set as an excitation wavelength and a luminescent wavelength is in a region transmitted by the color filter. With this phosphor film, it is possible to realize a display device that has extremely high luminance efficiency and color reproducibility.
-
Citations
21 Claims
-
1. A lighting device, comprising:
-
a light source;
phosphor particles that are excited by light from the light source and emit light having a wavelength different from that of the light from the light source;
a light guide that propagates the light from the light source and irradiates the light in a plane shape; and
a phosphor layer formed by mixing the phosphor particles in a binder, wherein the phosphor layer is sandwiched between a translucent film and a non-permeable layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A phosphor film, comprising:
-
phosphor particles that are excited by light made incident thereon and emit light having a wavelength different from that of the light; and
a phosphor layer formed by mixing the phosphor particles in a binder, wherein the phosphor layer is sandwiched between a translucent film and a non-permeable layer.
-
-
19. A display device, comprising:
-
a light source;
phosphor particles that are excited by light from the light source and emit light having a wavelength different from that of the light;
a light guide that makes the light from the light source incident thereon and emits the light from an emission surface;
a phosphor layer in which the phosphor particles are dispersed in a binder;
a translucent film and a non-permeable layer provided to sandwich the phosphor layer; and
a display element provided on the emission surface side of the light guide, wherein the phosphor particles have a characteristic that the phosphor particles are excited by light in a region, which is cut by a color filter formed in the display element, of a wavelength region of the light emitted from the light source and emit light having a wavelength passing through the color filter. - View Dependent Claims (20, 21)
-
Specification