Back lighting module and lighting mixed module there of
A light mixing device and backlight module technology, which is applied in optics, optical components, nonlinear optics, etc., can solve the problems of increasing light mixing uniformity and uneven light mixing, so as to increase light mixing uniformity, light mixing uniform effect
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no. 1 example
[0061] FIG. 3 is a schematic cross-sectional view of a light mixing device according to a first embodiment of the present invention. Referring to FIG. 3 , the light mixing device 200 of the present invention includes a bottom plate 210 , a plurality of sidewalls 212 , a reflective structure 220 and a plurality of side-emitting LEDs 230 . Wherein, the bottom plate 210 and the side walls 212 are connected to each other, and the bottom plate 210 may be integrally formed with these side walls 212 .
[0062]It is worth noting that the light source used in the light mixing device 200 of the present invention is a side-emitting light-emitting diode 230 , which is disposed on the bottom plate 210 . Generally speaking, the base plate 210 has screw holes or through holes (not shown in the figure), and the side-emitting LEDs 230 are embedded in the screw holes or through holes, for example. The side-emitting LED 230 can be a red side-emitting LED, a green side-emitting LED or a blue sid...
no. 2 example
[0071] FIG. 4 is a schematic diagram of a light mixing device according to a second embodiment of the present invention. Please refer to FIG. 4 , this embodiment is similar to the first embodiment, and the main difference between the two is that: the reflective structure 220 of the light mixing device 200a of this embodiment is a wedge-shaped reflective sheet. The mirror surface 222 of the wedge-shaped reflector will form a certain angle with the side wall 212, and the light L3 will be reflected by the inclined mirror surface 222 multiple times to increase the travel path in the light mixing device 200a, thereby making the light provided by the light mixing device 200a Has better uniformity.
[0072] FIG. 5 is a schematic diagram of another light mixing device according to the second embodiment of the present invention. It can be seen clearly from FIG. 5 that the reflective structure 220 of the light mixing device 200b in this embodiment is a plurality of micro reflective ele...
no. 3 example
[0074] FIG. 6 is a schematic diagram of a light mixing device according to a third embodiment of the present invention. Please refer to FIG. 6 , the main difference between this embodiment and the first embodiment is that: the light mixing device 200c of the present invention also includes a light-transmitting refraction plate D, which is located between the side walls 212 and above the side-emitting light-emitting diodes 230 , and the light-transmitting refraction plate D is a material with a high refractive index, such as polymethyl methacrylate (polymethyl methacrylate, PMMA). The light (such as light L6 ) emitted by the side-emitting LED 230 is repeatedly transmitted between the reflective structure 220 , the light-transmitting refraction plate D and the diffusion surface B, and finally exits the light-transmissive refraction plate D.
[0075] In detail, since the refractive index of the light-transmitting refraction plate D is greater than that of air, the incident angle ...
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