Direct-down type back-light module
A backlight module, direct type technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of increasing light-emitting diode elements, reducing the thickness of the known direct type backlight module 100, etc., to achieve the effect of improving uniformity
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no. 1 example
[0049] Figure 2A and Figure 2B They are three-dimensional schematic diagrams of the light guide unit according to the first embodiment of the present invention. FIG. 2C is a schematic cross-sectional view of the direct-lit backlight module according to the first embodiment of the present invention. Please refer to Figure 2A 2C, the direct type backlight module 200 of this embodiment includes a frame body 210, a substrate 220, a plurality of light emitting elements 230 and a light guide unit 240a. The frame body 210 includes a bottom 212 and a surrounding wall 214 extending upward from a side of the bottom 212 , and the substrate 220 is disposed on the bottom 212 of the frame body 210 . In addition, the material of the frame body 210 can be metal or plastic, and the material of the substrate 220 can be metal, ceramics, glass, silicon substrate or other suitable materials. When the material of the substrate 220 is metal, the substrate 220 can be used as a heat sink.
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no. 2 example
[0057] Figure 3A and Figure 3B They are three-dimensional schematic diagrams of the light guide unit according to the second embodiment of the present invention. Please refer to Figure 3A and Figure 3B , this embodiment is similar to the above-mentioned embodiments, the difference is that in this embodiment, the light guide unit is a plurality of columnar light guides 310a and 310b separated from each other. The columnar light guides 310a and 310b are located above the light emitting elements 230, wherein the columnar light guides 310a are cylindrical (such as Figure 3A shown), and the columnar light guide 310b is a square column (such as Figure 3B shown). As far as the columnar light guides 310a are concerned, each columnar light guide 310a has a light exit surface 312a and a light incident surface 312b, and the light emitted by the light emitting element 230 can be mixed in the corresponding columnar light guide 310a to generate Uniform white light. Similarly, t...
no. 3 example
[0061] Figure 4A is a schematic perspective view of a light guide according to a third embodiment of the present invention, and Figure 4B is a schematic cross-sectional view of a light guide according to a third embodiment of the present invention. Please refer to Figure 4A and Figure 4B , this embodiment is similar to the above-mentioned embodiments, the difference is that: in this embodiment, these light guides 410 are disposed on the substrate 220 . Each light guide 410 includes a flat portion 412 abutting against the substrate 220 and a protruding portion 414 extending outward and upward from one side of the flat portion 412 . In addition, each light guide 410 has a light emitting surface 410 a and a light incident surface 410 b, wherein the light incident surface 410 b is on the other side of the flat plate portion 412 , and the light emitting surface 410 a is located on the top surface of the protruding portion 414 . The light emitting elements 230 are respective...
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Abstract
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