Light-emitting module, method of manufacturing the same and display device having the same

Abstract

A light-emitting module includes a light guiding body, a light-emitting unit and a fluorescent unit. The light-guiding unit has a groove. The light-emitting unit is disposed in a portion of the groove and emits a first light. The fluorescent unit is disposed in a remaining portion of the groove, receives the first light and emits a second light having a different wavelength range than the first light. The fluorescent unit emits the second light to an inner side surface of the groove. Therefore, loss of the first and second light is reduced and light-using efficiency of the light-emitting module is increased. Furthermore, a power consumption of a display device is significantly reduced.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the present invention can be understood in more detail from the following descriptions taken in conjunction with the accompanying drawings wherein:

FIG. 1 is a perspective view illustrating a light-emitting module in accordance with an embodiment of the present invention;

FIG. 2 is an exploded perspective view illustrating the light-emitting module in FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating the light-emitting module taken along a line I-I′ in FIG. 2 in accordance with an embodiment of the present invention;

FIG. 4 is an exploded perspective view illustrating a light-emitting module in accordance with an embodiment of the present invention;

FIG. 5 is an exploded perspective view illustrating a light-emitting module in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view illustrating the light-emitting module taken along a line II-II′ in FIG. 5 in accordance with an embodiment of the present invention;

FIG. 7 is an exploded perspective view illustrating a light-emitting module in accordance with an embodiment of the present invention;

FIG. 8 is a perspective view illustrating a display device in accordance with an embodiment of the present invention;

FIG. 9 is an exploded perspective view illustrating the display device in FIG. 8 in accordance with an embodiment of the present invention;

FIG. 10 is a cross-sectional view illustrating the display device taken along a line III-III′ in FIG. 9 in accordance with an embodiment of the present invention;

FIG. 11 is an exploded perspective view illustrating a display device in accordance with an embodiment of the present invention;

FIG. 12 is a cross-sectional view illustrating the display device taken along a line IV-IV′ in FIG. 11 in accordance with an embodiment of the present invention;

FIG. 13 is an exploded perspective view illustrating a display device in accordance with an embodiment of the present invention; and

FIG. 14 is a cross-sectional view illustrating the display device taken along a line V-V′ in FIG. 13 in accordance with an embodiment of the present invention.

Claims

1. A light-emitting module comprising: a light-guiding unit having a groove;a light-emitting unit disposed in a portion of the groove, wherein the light-emitting unit emits a first light; anda fluorescent unit formed in a remaining portion of the groove, wherein the fluorescent unit receives the first light and emits a second light having a different wavelength range than the first light.

2. The light-emitting module of claim 1, wherein the light-emitting unit includes a light-emitting diode for emitting a blue-colored light.

3. The light-emitting module of claim 2, wherein the fluorescent unit converts the blue-colored light into a white-colored light.

4. The light-emitting module of claim 3, wherein the fluorescent unit includes a yellow fluorescent unit.

5. The light-emitting module of claim 3, wherein the fluorescent unit includes a red fluorescent unit and a green fluorescent unit.

6. The light-emitting module of claim 1, further comprising a power printed circuit film electrically connected to the light-emitting unit and providing a driving current to the fluorescent unit.

7. The light-emitting module of claim 6, wherein the light-emitting unit is disposed on the power printed circuit film and is inserted into the groove.

8. The light-emitting module of claim 1, wherein the groove is defined by a base surface being formed at a determined depth from a surface of the light-guiding unit, and an inner side surface extending from the base surface.

9. The light-emitting module of claim 8, wherein the fluorescent unit having a predetermined thickness is formed on the base surface and the inner side surface.

10. The light-emitting module of claim 1, wherein the light-guiding unit comprises: a first surface;a second surface disposed opposite to the first surface; anda side surface connecting the first surface to the second surface.

11. The light-emitting module of claim 10, wherein the groove is formed in a direction from the first surface to the second surface.

12. The light-emitting module of claim 11, wherein a plurality of the grooves is formed along an edge portion of the first surface.

13. The light-emitting module of claim 10, wherein the groove is formed in the side surface.

14. The light-emitting module of claim 13, further comprising a plurality of side surfaces, wherein a plurality of the grooves is formed in more than one of the side surfaces.

15. A method of manufacturing a light-emitting module comprising: forming a groove in a light-guiding body;forming a fluorescent unit in a portion of the groove; andinserting a light-emitting unit into a remaining portion of the groove, wherein the light-emitting unit is disposed on a power printed circuit film.

16. The method of manufacturing a light-emitting module of claim 15, wherein: the light-emitting unit includes a blue-colored light-emitting diode for emitting a blue-colored light, andthe fluorescent unit includes a fluorescent material for converting the blue-colored light into a white-colored light and emitting the white-colored light toward a surface of the groove.

17. A display device comprising: a light-emitting module including: a light-guiding unit,a light-emitting unit, anda fluorescent unit, wherein: the light-guiding unit includes a groove,the light-emitting unit is disposed in the groove and emits a first light,the fluorescent unit is disposed at a base surface and an inner side surface of the groove, andthe fluorescent unit receives the first light and emits a second light having a different wavelength range than the first light; anda display panel displaying an image based on a light received from the light guiding unit.

18. The display device of claim 17, wherein the light-emitting unit includes a light-emitting diode for emitting a blue-colored light and the fluorescent unit includes a fluorescent material for converting the blue-colored light into a white-colored light.

19. The display device of claim 17, wherein the light-emitting module comprises: a driving portion for outputting a driving current of the light-emitting unit; anda power printed circuit film electrically connecting the driving portion to the light-emitting unit.

20. The display device of claim 17, wherein the light-guiding unit comprises: a light-emitting surface for emitting the light to the display panel;an opposite surface disposed opposite to the light-emitting surface; anda side surface connecting the light-emitting surface to the opposite surface.

21. The display device of claim 20, wherein the groove is formed in a direction from the light-emitting surface to the opposite surface.

22. The display device of claim 21, wherein: the groove includes a base surface substantially parallel to the light-emitting surface and an inner side surface connecting the base surface to the light-emitting surface, andthe fluorescent unit having a predetermined thickness is formed at the base surface and the inner side surface.

23. The display device of claim 20, wherein the groove is formed in a direction from the opposite surface to the light-emitting surface.

24. The display device of claim 20, wherein the groove is formed in the side surface.

25. The display device of claim 20, further comprising a receiving container comprising: a bottom plate on which the light-guiding unit is disposed; anda sidewall facing the side surface and having a stepped portion supporting the display panel.