Optical coupling device and backlight module
An optical coupling device and optical coupling technology, applied in lighting devices, fixed lighting devices, optics, etc., can solve problems such as difficulty, low optical coupling and efficiency, and achieve increased optical coupling efficiency, improved optical coupling efficiency, and reduced light source. The effect of thickness
Inactive Publication Date: 2014-07-02
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
However, it is difficult to make the thickness of the light source as thin as the light guide plate, which leads to low optical coupling and efficiency between the light source and the light guide plate.
Method used
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[0013] see figure 1 , a backlight module 400 provided by an embodiment of the present invention includes a light guide plate 300 , a plurality of light sources 200 and an optical coupling device 100 . The light coupling device 100 is located between the light guide plate 300 and the plurality of light sources 200 for coupling light emitted by the plurality of light sources 200 into the light guide plate 300 . In this embodiment, the plurality of light sources 200 are all light emitting diodes (Light emitting modules, LEDs), and each light source 200 includes a light emitting portion 210 and a substrate 220 . The light emitting part 210 is fixed on the substrate 220 and is electrically connected to the substrate 220 . The substrate 220 is electrically connected to an external circuit board (not shown), so that the substrate 220 receives electrical signals from the external circuit board to control the light emitting part 210 to emit light.
[0014] The optical coupling device...
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The invention relates to an optical coupling device used for enabling light rays emitted out from a plurality of light sources to be coupled into a light guide plate. The optical coupling device comprises a plurality of light guide parts. All the light guide parts are made of light transmitting materials and used for being arranged corresponding to the light sources respectively. Each light guide part comprises a light-in face, a light-out face, a top face and a bottom face. Each light-in face and the corresponding light-out face are oppositely arranged, each top face and the corresponding bottom face are oppositely arranged, and the top faces and the bottom faces are both connected with the light-in faces and the light-out faces. Each top face is perpendicular to the corresponding light-in face and the light-out face. The thickness of the light-in faces is larger than the thickness of the light-out faces in the direction perpendicular to the top faces. The light-in faces of the light guide parts are used for conducting optical coupling with the corresponding light sources, the light-out faces of the light guide parts are used for conducting optical coupling with the light guide plate, and thus the optical coupling efficiency of the light guide plate and the light sources can be improved while the thickness of the light sources is not decreased. The invention further relates to a backlight module using the optical coupling device.
Description
technical field [0001] The invention relates to an optical coupling device and a backlight module. Background technique [0002] The thickness of the light guide plate of the current side-mounted backlight module is getting thinner and thinner. In order to ensure a higher coupling efficiency between the light source and the light guide plate, the thickness of the light source is also required to be thinner and thinner. However, it is difficult to make the thickness of the light source as thin as that of the light guide plate, which leads to low optical coupling and efficiency between the light source and the light guide plate. Contents of the invention [0003] In view of this, it is necessary to provide an optical coupling device and a backlight module, which can improve the optical coupling efficiency between the light guide plate and the light source without reducing the thickness of the light source. [0004] An optical coupling device is used for coupling light emitt...
Claims
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Inventor 王何立颖
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD