Optical structure and preparation method thereof, backlight module, and display device
An optical structure and optical film layer technology, applied in optics, optical components, lighting devices, etc., can solve the problems of high price of DBEF4, complicated preparation process, high cost of light guide plate, and improve transmittance and effective utilization rate, The effect of low preparation cost and low thickness
Active Publication Date: 2014-11-19
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] However, in practical applications, since the technology of DBEF4 is mainly in the hands of 3M Company in the United States, and its preparation process is relatively complicated, the price of DBEF4 is relatively expensive, which will lead to a higher cost of the light guide plate.
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[0056] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0057] Figure 4 A schematic diagram of an optical structure provided by an embodiment of the present invention. Such as Figure 4 As shown, the optical structure 10 includes a light guide layer 11 and an optical film layer 12, wherein the optical film layer 12 includes a quarter-wave plate 13 and a reflective layer 14 respectively arranged on both sides of the light guide layer 11, and arranged on The first cholesteric liquid crystal layer 15 between the quarter wave plate 13 and the light guide layer 11 . Specifically, in this embodiment, the pitch rotation direction of the cholesteric liquid crystal in the first cholesteric liquid crystal layer 15 is left-...
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The invention relates to an optical structure and a preparation method thereof, a backlight module, and a display device. The optical structure comprises a light guide layer and an optical film layer; the optical film layer comprises a quarter-wave plate and a reflective layer respectively arranged on the two sides of the light guide layer, as well as a first cholesteric liquid crystal layer arranged between the quarter-wave plate and the light guide layer; the pitch rotation direction of cholesteric liquid crystal in the first cholesteric liquid crystal layer is leftward, and the first cholesteric liquid crystal layer allows the rightward-rotation circularly polarized light to transmit, and can reflect leftward-rotation circularly polarized light to the reflective layer; or the pitch rotation direction of cholesteric liquid crystal in the first cholesteric liquid crystal layer is rightward, the first cholesteric liquid crystal layer allows the leftward-rotation circularly polarized light to transmit, and can reflect rightward-rotation circularly polarized light to the reflective layer. The optical structure has higher light transmittance and effective utilization rate, and is lower in production cost, and smaller in thickness.
Description
technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to an optical structure and a preparation method thereof, a backlight module including the above optical structure, and a display device including the above backlight module. Background technique [0002] In a liquid crystal display, the light source emits light to the light guide plate, making the light guide plate a surface light source. The light guide plate emits light to the display panel, and the light passes through the lower polarizer, the liquid crystal layer between the array substrate and the color filter substrate, and the upper polarizer in sequence. Specifically, such as figure 1 As shown, the light can be decomposed into P light parallel to the incident surface and S light perpendicular to the incident surface; when the light passes through the lower polarizer, the P light can pass through the lower polarizer, and the S light will be polarized ...
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Login to View More IPC IPC(8): G02B6/00G02B5/30G02F1/13357F21S8/00F21V13/12
Inventor 鹿岛美纪
Owner BOE TECH GRP CO LTD