| Patent application number | Description | Published |
|---|
| 20080231774 | Lighting device and display device provided with the same - To provide a flat lighting device used for a liquid crystal display device and the like that can be made thin and lightweight and produced at low cost, the lighting device of the present invention includes a plurality of surface light emitting plates which are two-dimensionally arranged. Each of the plurality of surface light emitting plates includes a light guide portion and a light source portion provided in an end portion of the light guide portion. The light guide portion and the light source portion are integrally provided. The light source portion of a surface light emitting plate two-dimensionally overlaps with the light guide portion of another surface light emitting plate adjacent thereto, so light having a uniform intensity can be emitted above the plurality of surface light emitting plates. | 09-25-2008 |
| 20080284316 | Illuminating device, display device and optical film - To realize a configuration in which only light having an unnecessary wavelength is cut so that light having a necessary wavelength may be obtained efficiently, a filter layer that selectively reflects light having a particular wavelength and a phosphor layer containing a phosphor that is excited with the light having the particular wavelength to emit light are provided. Thus, the light reflected by the filter layer is converted into light having a different wavelength by the phosphor layer so as to pass through the filter layer. The filter layer is placed between a display element and a light source of an illuminating device, and the filter layer that selectively reflects a light component to be absorbed by the display element is used, whereby the light component to be absorbed by the display element is converted by the phosphor layer so as to pass through the display element. Accordingly, the illuminating device and a display device having very high luminance efficiency and color reproducibility may be realized. | 11-20-2008 |
| 20090190069 | Lighting device and liquid crystal display device using the same - A lighting device includes: a light source; a light guiding plate; and a reflector. The light guiding plate includes: a light entrance part, which introduces light of the light source into the light guiding plate; and a plurality of reflecting parts, which are formed on at least the one of the light exit face and the opposed face to cause the introduced light to exit to outside. The plurality of reflecting parts are arranged in staggered pattern in a circumferential direction of a circle having the light entrance part as its center, and in a radius direction orthogonal to the circumferential direction. Therefore a reflecting surface of one of the plurality of reflecting parts that is placed in a back does not fall in a shadow of another one of the plurality of reflecting parts that is placed nearer to the light source, and incident light is reflected in a wide area. | 07-30-2009 |
| 20090207344 | Illuminating device and liquid crystal display device - In an illuminating device, a plurality of light reflecting portions each including a plurality of prisms adjacent to one another are formed on one of an opposing surface and an exit surface of a light guide plate so as to be spaced apart from one another. Each of the plurality of prisms is in a shape of a triangle in section with one of the opposing surface and the exit surface being a base of the triangle, and is formed so as to protrude therefrom. Light introduced from a light source is reflected by the plurality of prisms to be illuminating light having directivity in a vertical direction. Light which has passed through a prism which is nearer to the light input portion is again taken into the light guide plate by an adjacent prism at a subsequent stage and can be reused. | 08-20-2009 |
| 20090323372 | Device and display device using the same - Provided is a lighting device that inputs a light from a light source from a side surface of a light guide body, and outputs the light from an upper surface of the light guide body, in which a recess is formed on a light input surface of a light guide plate so as to face the light source, and a paraboloid extending in a radial pattern in a light output direction from a light output part of the light source is connected to the light input surface. Prisms arranged on a light output surface of the light guide body are disposed up to an area closest to the light source wherever possible. With the above-mentioned configuration, an output of the light of components perpendicular to the light output surface of the light guide body remarkably increases, and brightness of the lighting device can be enhanced without using a prism sheet. | 12-31-2009 |
| 20100124076 | Illumination device and display device - Provided is a display device including a microprism array backlight using a point light source, in which at least two pyramidal microprisms are arranged on an opposing surface opposite to an exit surface of a light guide plate, in areas overlapping openings of display element. An incident surface of the light guide plate includes an entrance portion, which is a semicircular depressed portion. An arrangement angle of the microprisms is optimized so that light from the entrance portion may be output with high efficiency. With this structure, the display device may use two or more point light sources, to thereby prevent moire in a liquid crystal panel. | 05-20-2010 |
| 20100142225 | Illuminating device and display device having the same - Provided is an illuminating device including a plurality of light sources. Micro prisms are provided in an opposed surface of a light guide plate. Each of the micro prisms is provided so that a reflective surface has a bottom side located at substantially 90 degrees with respect to an optical path of a beam from any one of the light sources. In a display device including a liquid crystal panel illuminated by the illuminating device, at least two micro prisms are provided in each area overlapped with aperture portions of the liquid crystal panel. | 06-10-2010 |
