Light field modulation layer, backlight structure and display device

A backlight structure and modulation layer technology, which is applied in the direction of optics, optical elements, diffraction gratings, etc., can solve the problems of increasing the overall thickness of the direct-type backlight structure, increasing the number of LEDs used, and the number of LEDs used redundantly, so as to improve the utilization rate, The effect of reducing production cost and reducing the overall thickness

Active Publication Date: 2017-09-22
BOE TECH GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

That is to say, in the prior art, the uniformity of the direct-type backlight structure is improved by increasing the longitudinal light mixing distance between LEDs and reducing the spacing between LEDs, which will not only greatly increase th

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  • Light field modulation layer, backlight structure and display device
  • Light field modulation layer, backlight structure and display device
  • Light field modulation layer, backlight structure and display device

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[0065] The embodiments of the application provide a light field modulation layer, a backlight structure, and a display device, which are used to uniformly distribute the energy and direction of light emitted from the light field modulation layer, reduce the thickness of the backlight structure, and reduce the use of LEDs in the backlight structure Number, reduce costs.

[0066] An optical field modulation layer provided by an embodiment of the application, and an optical field modulation layer provided by an embodiment of the application, includes a waveguide layer and a grating structure. The waveguide layer has a first surface and a second surface opposite to each other. The grating structure is arranged on the first surface or the second surface of the waveguide layer, and the grating structure is used for guiding the light incident on the grating structure into the waveguide layer and totally reflecting and propagating in the waveguide layer. Such as figure 2 As shown, the o...

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Abstract

The invention discloses a light field modulation layer, a backlight structure and a display device. The energy and direction of light emitted from the light field modulation layer can be uniformly distributed, the thickness of the backlight structure is reduced, the number of LED used in the backlight structure is reduced, and the cost is lowered. The light field modulation comprises a waveguide layer and a grating structure, the waveguide layer is provided with a first surface and a second surface which are oppositely arranged, the grating structure is arranged on the first surface or the second surface of the waveguide layer, the grating structure is used for guiding the incident light on the grating structure into the waveguide layer and conducts total reflection propagation in the waveguide layer.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a light field modulation layer, a backlight structure and a display device. Background technique [0002] Liquid crystal display (Liquid Crystal Display, LCD), as a light-transmitting display, requires a backlight structure to provide the brightness required for display. Light Emitting Diode (LED) light source is currently the most commonly used LCD direct-lit backlight structure Light source, it has the characteristics of long life, small size, low voltage, etc., but it is a point light source, and the uniformity of its light emission is difficult to control. Since the light field distribution of a single LED light source presents a Lambert curve distribution, such as figure 1 As shown, the LED light field distribution curves are roughly the same, and its main energy is concentrated at -60°~60°, and the energy is the strongest at 0°. This characteristic of LED will l...

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Application Information

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IPC IPC(8): G02B5/18G02F1/13357
CPCG02F1/133602G02F1/133605G02B5/1814G02F1/133614G02F1/133603G02F1/133606G02F2202/36G02B5/1819G02B5/1866G02B5/1861G02B6/0016G02F2201/06G02F2203/22
Inventor 孟宪东王维董学吕敬陈小川谭纪风高健孟宪芹
Owner BOE TECH GRP CO LTD
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