Abstract: In the lighting device, cylindrical lenses are provided on a reflection surface side of a light guide plate, and the adjacent cylindrical lenses are connected by a concaved curved surface.

Abstract: In the lighting device, cylindrical lenses are provided on a reflection surface side of a light guide plate, and the adjacent cylindrical lenses are connected by a concaved curved surface.

Abstract: A lighting device including a light guide plate, a light source unit disposed on the side of the light guide plate and a polarization separation element disposed between the light guide plate and the light source unit. The polarization separation element is used for transmitting linearly polarized light in a first polarized direction and reflecting linearly polarized light in a polarized direction normal to the first polarized direction. The light source unit includes a pillar-shaped light guide which light exits at a first side surface, a spot light emission source disposed on the end surface of the pillar-shaped light guide, and a reflecting layer disposed on a second side surface of a prism surface opposed to the first side surface for reflecting light from the spot light emission source.

Abstract: A lighting apparatus 10 comprising light sources 12a, 12b for emitting light, a plurality of light reflection portions 20 formed on the reflection side for reflecting light incident from the light sources, and a linear photoconductor 14 for causing the light to exit from the exit side opposed to the reflection side, the planes of the plurality of reflection portions being respectively tilted at angles which converge the light to the human eyes watching. Angles of the light reflection portions are set so that exit angles of light exiting from the linear photoconductor are required angles, whereby the lighting apparatus can have a uniform light intensity distribution. The application of the lighting apparatus can provide a liquid crystal display of good display characteristics.

Abstract: Light L1 emitted by a light source unit 2 is non-polarized. The light L1 is transmitted by a phase modulation element 4 to be non-polarized light L2 and enters a polarization separation element 6 which transmits light polarized in a first polarized direction and reflects light polarized in a second polarized direction normal to the first polarized direction. The polarization separation element 6 transmits first linearly polarized light L3 and reflects second linearly polarized light L4 whose polarized direction is normal to the linearly polarized light L3. The linearly polarized light L3 goes to a light guide plate not shown. The linearly polarized light L4 enters a phase modulation element 4 to be transformed to circularly polarized light L5, and circularly polarized light L5 returns to the light source unit 2. The light L5 which has returned to the light source unit 2 repeats reflections, etc. in the light source unit 2 to be again non-polarized light L1 and exits the light source unit 2.

Abstract: A lighting apparatus 10 comprising light sources 12a, 12b for emitting light, a plurality of light reflection portions 20 formed on the reflection side for reflecting light incident from the light sources, and a linear photoconductor 14 for causing the light to exit from the exit side opposed to the reflection side, the planes of the plurality of reflection portions being respectively tilted at angles which converge the light to the human eyes watching. Angles of the light reflection portions are set so that exit angles of light exiting from the linear photoconductor are required angles, whereby the lighting apparatus can have a uniform light intensity distribution. The application of the lighting apparatus can provide a liquid crystal display of good display characteristics.