초록 ▼

A light guiding plate is provided on the obverse side of a display for displaying a display image while varying the display image. Unevenness is formed at a predetermined position at a reverse surface of the light guiding plate. A light emitting element is disposed at the side surface of the light

A light guiding plate is provided on the obverse side of a display for displaying a display image while varying the display image. Unevenness is formed at a predetermined position at a reverse surface of the light guiding plate. A light emitting element is disposed at the side surface of the light guiding plate in such a manner as to introduce the light to the light guiding plate. Alternatively, an uneven portion in conformity with a pattern of a desired display image may be formed at a reverse surface of the light guiding plate, and a light emitting element is disposed at the side surface of the light guiding plate in such a manner as to introduce the light to the light guiding plate.

대표청구항 ▼

What is claimed is: 1. A light emitting display device comprising: a display for displaying a display image while varying the display image, the display having a light source therein; a light guiding plate provided on or over a displaying surface of the display, the light guiding plate having uneve

What is claimed is: 1. A light emitting display device comprising: a display for displaying a display image while varying the display image, the display having a light source therein; a light guiding plate provided on or over a displaying surface of the display, the light guiding plate having unevenness at a predetermined position at a surface that faces the display; and a light emitting element disposed at a side surface of the light guiding plate in such a manner as to introduce a light into the light guiding plate. 2. The light emitting display device according to claim 1, wherein the display is any one of a display using 7 segments, a display for displaying a letter or a figure, a liquid crystal display, and a dot matrix display using LED. 3. The light emitting display device according to claim 1, wherein the display is a display using 7 segments having LEDs, and the unevenness is formed over the entire surface of the light guiding plate or over a portion of the surface that does not cover the 7 segments of the display. 4. The light emitting display device according to claim 1, wherein the unevenness is formed by hairlining or graining. 5. The light emitting display device according to claim 1, wherein a clearance is defined between the light guiding plate and the display. 6. The light emitting display device according to claim 1, wherein the light emitting element is any one of an LED chip, a lamp type LED coated with a domed resin, a chip type LED having an LED chip mounted on a chip-like insulating substrate and coated with a resin, and an optical fiber connected to a light source. 7. The light emitting display device according to claim 1, wherein the light emitting element disposed at the side surface of the light guiding plate includes red, green and blue light emitting elements in such a manner as to independently turn on or off the red, green and blue light emitting elements. 8. The light emitting display device according to claim 1, wherein the light emitting element is disposed at the side surface of the light guiding plate directly or with an interval. 9. The light emitting display device according to claim 1, wherein a surrounding of the light emitting element is covered with a reflecting film in such a manner that the light emitted from the light emitting element readily enters into the light guiding plate. 10. The light emitting display device according to claim 1, wherein a light diffusing plate is disposed on another surface of the light guiding plate opposite to said surface with the unevenness. 11. The light emitting display device according to claim 1, wherein a plurality of the light guiding plates are disposed on or over the displaying surface. 12. The light emitting display device according to claim 1, wherein the light emitting element disposed at the side surface of the light guiding plate includes red, green and blue light emitting elements, and on a first side surface of the light guiding plate, red, green and blue light emitting elements are arranged in this order, and on a second side surface opposite to the first side surface, blue, green and red light emitting elements are arranged in this order. 13. The light emitting display device according to claim 1, wherein the unevenness of the light guiding plate reflects the light from the light emitting element in such a manner that the light guiding plate displays a background image for the display image. 14. The light emitting display device according to claim 1, wherein the displaying surface of the display is a top surface of the display and the surface of the light guiding plate that faces the display is a bottom surface of the light guiding plate. 15. The light emitting display device according to claim 14, wherein a light diffusing plate is disposed on a top surface of the light guiding plate opposite to the bottom surface. 16. The light emitting display device according to claim 14, wherein a plurality of the light guiding plates are disposed on or over the top surface of the display. 17. The light emitting display device according to claim 1, wherein: the display includes a top side and a bottom side; the light guiding plate covers the top side of the display, and includes a bottom surface facing the top side of the display and a top surface opposite to the bottom surface; and the unevenness is formed at the bottom surface of the light guiding plate.