BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view showing a construction of a backlight module of the prior art.
FIG. 2 is a schematic view showing a construction of a first preferred embodiment of the present invention.
FIGS. 3(A) and 3(B) are perspective views respectively showing a construction of a second preferred embodiment of the present invention.
FIG. 4 is a schematic view showing travel of streams of light in a third preferred embodiment of the present invention.
FIG. 5 is a schematic view showing travel of streams of light in a fourth preferred embodiment of the present invention.
FIGS. 6(A) and 6(B) are schematic views respectively showing a construction of a fifth preferred embodiment of the present invention.
FIGS. 7(A) and 7(B) are schematic views respectively showing a construction of a sixth preferred embodiment of the present invention.
FIG. 8 is schematic view showing a construction of a seventh preferred embodiment of the present invention.
FIG. 9 is schematic view showing a construction of an eighth preferred embodiment of the present invention.
FIG. 10 is schematic view showing a construction of a ninth preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention relates to an installation to upgrade light source efficiency by providing a dimmer in a backlight module in relation to the route the light emitted from the light source travels; and the dimmer in a construction that is totally permeates and/or reflects the light is disposed at where streams of light directly or indirectly radiate. As illustrated in FIG. 2, a first preferred embodiment of the present invention is related to a direct backlight module provided with a dimmer 3 on top of multiple light sources 21. Each light source 21 is related to a light emitting diode or a lamp, and the dimmer 3 is related to a single optical structure to cover up the top of those multiple light sources 21. As illustrated in FIG. 3(A) for a second preferred embodiment of the present invention, a dimmer 3 includes multiple optical structures 31 with each one assigned to an individual light source 21. As illustrated, one optical structure 31 is disposed on top of its respective light source 21, disposed between two neighboring light sources 21 in single layer or multiple layers overlapped on one another or crisscross; and those multiple optical structures 31 are provided in any combination of totally permeable, totally reflective, and totally permeable and reflective forms. As illustrated in FIG. 3(B), those optical structures 31 are respectively disposed on the top of each light source 21, between two neighboring light sources 21 in a same reflective mask 22. A reflective film 23 is disposed below those light sources 21, and the optical structure 31 is related to a totally permeable, totally reflective, or reflective and permeable form. Wherein, the totally permeable optical structure is related to a transparent film; and the reflective and permeable optical structure includes a pre-processed transparent film or a compound material. The process method is related to sandblasting, etching, atomization, disposition of dots, or macro-molecular material. Process may be applied to control reflectivity and permeability, and a reflectivity/permeability ratio can be adjusted as desired by the user.
In a fourth preferred embodiment illustrated in FIG. 4 showing travel route of light emitted from each light source 21, an optical structure 311 is disposed on top of each light source 21. Both of its reflectivity and permeability are set at same 50% so that 50% of streams of light emitted from each light source 21 that go upward and pass through the optical structure 311 while another 50% of streams of light are reflected to the reflective film 23 disposed below the light source 21 before being radiated upwards so to average luminance between any light source 21 and the rest of those light sources 21 to upgrade the efficiency of the light sources 21, effectively distribute streams of light from all the light sources, and eliminate dim and dark bands otherwise created among light sources.
FIG. 5 shows a fourth preferred embodiment of the present invention. Wherein, a totally reflective optical structure 312 is disposed over each light source 21. All streams of light upwardly emitted from the light source 21 are reflected to the reflective film 23 disposed below the light source 21 before being upwardly radiated so to average luminance between the light source 21 and the rest of those light sources 21 to upgrade efficiency of repeated use of light while eliminating dim and dark bands otherwise existing abut any two neighboring light sources 21.
Now referring to FIG. 6(A), a fifth preferred embodiment of the present invention has a totally light permeable optical structure 313 separately provided above those light sources 21. The optical structure 313 further supports other optical film (e.g., a diffuser or a prism) and protects those light sources 21 and those optical films 4 respectively provided below and above the optical structure 313. Other optical structure 31 may be provided above the optical structure 313 in corresponding to each light source 21 as illustrated in FIG. 6(B).
The mounting means for the dimmer 3, other than those illustrated in FIGS. 2 and 3, is provided in a sixth preferred embodiment of the present invention as illustrated in FIGS. 7(A) and 7(B) essentially by having one or a plurality of transparent film 32 or compound material to define a dimming area 33 that is totally light permeable and/or reflective or to define another dimming area comprised of any combination of multiple totally light permeable and/or reflectively dimming areas. The dimming area 33 may be processed to be located at where above or among those light sources 21.
In a seventh preferred embodiment as illustrated in FIG. 8, the dimmer 3 related to a single optical structure 31 is mounted on the side of those light sources 21 to form a side emitting backlight module. As illustrated, a 2-way light input pattern is comprised of having those light sources 21 disposed on both sides of a light guide plate 24 and the optical structure 31 is provided on a light output side 241 of the light guide plate 24.
Alternatively as illustrated in FIG. 9 for an eighth preferred embodiment of the present invention, a dimmer includes multiple optical structures 31 in a quantity same as that of their corresponding light sources 21. Those light sources 21 input lights from one side of the light guide plate 24 and those optical structures 31 are disposed on the same side 242 of the light guide plate 24. The dimmer is comprised of one or a plurality of transparent film or compound material processed to define a dimming area that is totally light permeable and/or reflective and the dimming area may be provided on one side in relation to or among those light sources 21.
A ninth preferred embodiment of the present invention as illustrated in FIG. 10, multiple optical structures 31 are respectively provided on the light output side 241 and both sides 242 of the light guide plate 24. As illustrated in FIGS. 8, 9, and 10, the dimmer of the present invention is applied to a side emitting backlight module and mounted on the route the streams of light travel. The dimmer 3 related to an optical structure that is totally light permeable and/or reflective is capable of emitting constant streams of light and averaging luminance among those light sources, effectively eliminating those dim and dark bands among those light sources, reducing the quantity of light source needed, minimizing the use of optical films (e.g., diffuser, light enforcement film, or reflective polarizing film) in the backlight module so to more effectively distribute streams of light emitting from those light sources and upgrade the efficiency of repeated use of light.
The prevent invention provides an improved structure of an installation to upgrade light source efficiency, and this patent application is duly filed accordingly. However, it is to be noted that the preferred embodiments disclosed in the specification and the accompanying drawings are not limiting the present invention; and that any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention.
Patent Application
20080055927
