Light emitting diode, backlight module and liquid crystal display device
A technology of liquid crystal display device and light emitting diode, which is applied to lighting devices, fixed lighting devices, optics, etc., can solve the problems of low utilization rate of light source, low energy use efficiency of liquid crystal display device 100, increased cost of liquid crystal display device 100, and the like, To achieve the effect of improving the efficiency of use
Active Publication Date: 2016-01-20
INNOLUX CORP
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Problems solved by technology
[0005] However, the polarizing plate 120 not only increases the cost of the overall liquid crystal display device 100, but also when undergoing polarization conversion, the light whose polarization direction is parallel to the transmission axis of the polarizing plate 120 can pass through the polarizing plate 120, while the light whose polarization direction is perpendicular to the polarizing plate The light of the transmission axis of 120 will be absorbed by the polarizer 120, so only part of the light will pass through the polarizer 120 and block most of the light
Therefore, the light source utilization rate of the backlight module 110 is relatively low, and thus the energy use efficiency of the liquid crystal display device 100 is not high.
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[0064] Figure 2A It is a schematic structural diagram of a light emitting diode according to an embodiment of the present invention. Please refer to Figure 2A , the light emitting diode 200 includes a substrate 210 , a semiconductor layer 220 , a first electrode 230 and a second electrode 240 . The material of the substrate 210 can be sapphire, silicon carbide, silicon, gallium arsenide or aluminum nitride, which is not limited in the present invention.
[0065] The semiconductor layer 220 includes a first type doped semiconductor layer 222 , a light emitting layer 224 and a second type doped semiconductor layer 226 . The first-type doped semiconductor layer 222 is disposed on the substrate 210, and the light-emitting layer 224 is disposed on a part of the first-type doped semiconductor layer 222, and is located between the first-type doped semiconductor layer 222 and the second-type doped semiconductor layer. 226 , and the second-type doped semiconductor layer 226 is dis...
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The invention discloses a light emitting diode, a backlight module and a liquid crystal display device. The liquid crystal display device includes a backlight module and a liquid crystal display panel. The backlight module includes an optical board and a plurality of light emitting diodes. The light emitting diode includes a semiconductor layer, a first electrode and a second electrode. The semiconductor layer includes a first-type doped semiconductor layer, a light-emitting layer and a second-type doped semiconductor layer, wherein the light-emitting layer is located between the first-type doped semiconductor layer and the second-type doped semiconductor layer. The first electrode is electrically connected to the first-type doped semiconductor layer, the second electrode is electrically connected to the second-type doped semiconductor layer, and the second electrode is a grating, suitable for allowing light with the first polarization direction to pass through, and Suitable for reflecting light having a second polarization direction, wherein the first polarization direction is perpendicular to the second polarization direction.
Description
technical field [0001] The invention relates to a light-emitting diode, a backlight module and a liquid crystal display device, and in particular to a light-emitting diode, a backlight module and a liquid crystal display device whose electrodes are gratings. Background technique [0002] With the advancement of modern semiconductor technology, light emitting diodes have been widely used to provide light sources required by electronic devices, such as: traffic signs, large signage, scanners, liquid crystal display devices, etc. [0003] A common light-emitting diode is a kind of semiconductor element, and its material is usually made of group III-V elements such as gallium phosphide (GaP), gallium arsenide (GaAs), and the like. The light-emitting principle of light-emitting diodes is to convert electrical energy into light, that is, to apply current to the above-mentioned compound semiconductors, and to release energy in the form of light through the combination of electrons ...
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IPC IPC(8): H01L33/36G02F1/13357G02F1/1335F21S8/00F21Y101/02
Inventor 廖元銊
Owner INNOLUX CORP