公开(公告)号：US20200326465A1

公开(公告)日：2020-10-15

申请号：US16097503

申请日：2018-02-01

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jian GAO ,  Xiaochuan CHEN ,  Wei WANG ,  Jifeng TAN ,  Xiandong MENG ,  Xianqin MENG ,  Pengcheng LU

IPC: F21V8/00

Abstract: A backlight module, a manufacturing method thereof, a display device and a light guide device are provided. The backlight module includes: a light guide structure, including a volume grating layer, the volume grating layer including a plurality of volume grating portions and a light guide portion between adjacent volume grating portions, the plurality of volume grating portions being configured to introduce a beam of a specific wavelength into the light guide portion; and a light extraction structure, located on a light exit side of the light guide structure, wherein a refractive index of the light guide structure is greater than a refractive index of the light extraction structure, and an incident angle of the beam introduced into the light guide portion on a plane where the light guide portion is located is not less than a total reflection critical angle of the light guide structure.

公开(公告)号：US20200285104A1

公开(公告)日：2020-09-10

申请号：US16640952

申请日：2019-09-25

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Xiandong MENG ,  Jifeng TAN ,  Wei WANG ,  Xianqin MENG ,  Fangzhou WANG ,  Qiuyu LING ,  Xiaochuan CHEN

IPC: G02F1/1335 ,  F21V8/00

Abstract: The present disclosure provides an optical substrate and a display device. The optical substrate includes: a light guide plate which includes a light entering surface and a light extraction surface adjacent to the light entering surface, and is configured to enable light entering the light guide plate through the light entering surface to be totally reflected toward an opposite surface of the light guide plate opposite to the light entering surface; and a plurality of light extraction structures which is arranged on the light extraction surface of the light guide plate for extracting the totally-reflected light in the light guide plate, and has areas of orthogonal projections of the plurality of light extraction structures on the light extraction surface of the light guide plate gradually increasing along a direction from the light entering surface to the opposite surface.

公开(公告)号：US20200166680A1

公开(公告)日：2020-05-28

申请号：US16329456

申请日：2018-06-11

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiandong MENG ,  Wei WANG ,  Xue DONG ,  Jing LV ,  Xiaochuan CHEN ,  Jifeng TAN ,  Jian GAO ,  Xianqin MENG

IPC: G02B5/18 ,  G02F1/13357

Abstract: A surface light source, comprising 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 provided on the first or second surface of the waveguide layer; and the grating structure is used for guiding light incident to the grating structure to the waveguide layer and performing total reflection propagation in the waveguide layer. Such surface light source structure enables energy and direction of light emitted from a light field modulation layer to be distributed uniformly, and thus the thickness of the surface light source and the number of LEDs in the surface light source are reduced. Also disclosed is a display device.

公开(公告)号：US20200018885A1

公开(公告)日：2020-01-16

申请号：US16338307

申请日：2018-07-23

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Wei WANG ,  Xiandong MENG ,  Jifeng TAN ,  Jian GAO ,  Xiaochuan CHEN ,  Jing LV ,  Xue DONG

IPC: F21V8/00

Abstract: A backlight unit, a method for manufacturing the same and a display device are provided. The backlight unit includes a light guide plate, an LED layer and an optical microstructure layer. The light guide plate includes a light incident surface and a light exit surface opposite to the light incident surface. The LED layer is provided on the light incident surface of the light guide plate, and includes plural LED chips arranged in an array. The optical microstructure layer is provided on one of the light incident surface and the light exit surface of the light guide plate, and includes plural optical microstructures in one-to-one correspondence with the plural LED chips. Each of the plural optical microstructures is configured to cause at least a portion of light emitted from a corresponding LED chip to propagate in the light guide plate by total internal reflection.

公开(公告)号：US20190310456A1

公开(公告)日：2019-10-10

申请号：US16067980

申请日：2017-12-01

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Xianqin MENG ,  Wei WANG ,  Xue DONG ,  Yafeng YANG ,  Xiaochuan CHEN ,  Jifeng TAN ,  Xiandong MENG ,  Jian GAO

IPC: G02B26/00 ,  G02B5/18

Abstract: A display panel includes a light waveguide layer and a first substrate disposed opposite to each other, and further including an electrowetting control layer disposed between the light waveguide layer and the first substrate, the electrowetting control layer including a first electrode layer, a second electrode layer, and a grating layer and an electrowetting layer which are disposed between the first electrode and the second electrode layer, the grating layer and the electrowetting layer are configured to operatively couple light with a set transmittance, a setting direction, and a set wavelength out of the light waveguide layer.

公开(公告)号：US20190265543A1

公开(公告)日：2019-08-29

申请号：US16080149

申请日：2018-02-12

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jifeng TAN ,  Xianqin MENG ,  Yafeng YANG ,  Xiandong MENG ,  Wei WANG ,  Jian GAO

IPC: G02F1/1335 ,  G02B5/26 ,  G02B5/20

Abstract: A filter structure, a display substrate, a display panel and a display device are provided. The filter structure includes a first refractive index match layer, a waveguide layer, a second refractive index match layer and a grating layer, that are stacked, the waveguide layer is located between the first refractive index match layer and the second refractive index match layer, the second refractive index match layer is located between the waveguide layer 112) and the grating layer, and refractive index of the first refractive index match layer and refractive index of the second refractive index match layer both are smaller than refractive index of the waveguide layer.

公开(公告)号：US20190204691A1

公开(公告)日：2019-07-04

申请号：US16143859

申请日：2018-09-27

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jifeng TAN ,  Xiandong MENG ,  Wei WANG ,  Wenqing ZHAO ,  Xiaochuan CHEN

IPC: G02F1/1343 ,  G02F1/1335 ,  G02F1/133

Abstract: The present disclosure provides a liquid crystal display panel, an operating method thereof, and a liquid crystal display device. A liquid crystal display panel comprises: A liquid crystal display panel comprising: a first substrate including light-shielding portions and light-transmitting portions; an electrode layer including a plurality of discrete electrodes; a liquid crystal layer; wherein the liquid crystal layer is adaptable to form an array of liquid crystal optical elements according to voltages of the electrodes, and wherein the voltages of the electrodes are configured such that the array of liquid crystal optical elements formed in the liquid crystal layer guides light to the light-shielding portions of the first substrate, to perform a dark-state (L0) display, wherein the light is incident onto the liquid crystal layer.

公开(公告)号：US20190094650A1

公开(公告)日：2019-03-28

申请号：US15993888

申请日：2018-05-31

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jian GAO ,  Xiaochuan CHEN ,  Wei WANG ,  Jifeng TAN ,  Xiandong MENG

IPC: G02F1/29 ,  G02F1/137 ,  G02F1/1335 ,  G02F1/1343

Abstract: A first diffraction unit includes a first diffraction unit which includes a first substrate provided with a first polarizer on one side thereof and a first electrode on the other side thereof; a first diffraction lens provided on the first electrode; a second substrate provided opposite to the first substrate, a second electrode is provided on a side of the second substrate facing to the first substrate; and a first liquid crystal layer provided between the second electrode and the first diffraction lens, and having liquid crystal therein configured to be in a state in which the liquid crystal has a long axis direction parallel to an axial direction of an transmission axis of the first polarizer, or in a state in which the liquid crystal has a long axis direction perpendicular to an axial direction of an transmission axis of the first polarizer.

公开(公告)号：US20190004365A1

公开(公告)日：2019-01-03

申请号：US15750035

申请日：2017-07-31

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jifeng TAN ,  Wei WANG ,  Yafeng YANG ,  Xiaochuan CHEN ,  Jian GAO ,  Xinli MA ,  Can WANG ,  Can ZHANG ,  Xiandong MENG ,  Xianqin MENG ,  Dacheng ZHANG

IPC: G02F1/1335 ,  G02F1/1343 ,  F21V8/00

Abstract: A display panel and a display device are disclosed and belong to the field of display technology. The display panel comprises a first substrate and a second substrate opposite to each other, a liquid crystal layer, a first electrode, and a second electrode between the first substrate and the second substrate, a waveguide layer between the first substrate and the liquid crystal layer, and a plurality of grating units which are combined with the liquid crystal layer and disposed in a same layer as the liquid crystal layer; wherein the first electrode and the second electrode are configured to adjust a refractive index of the liquid crystal layer by changing voltages applied thereto; and a coupling efficiency at which light is coupled out of the waveguide layer is determined according to a difference between a refractive index of the grating units and the refractive index of the liquid crystal layer.

公开(公告)号：US20180231867A1

公开(公告)日：2018-08-16

申请号：US15742896

申请日：2017-07-07

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Jian GAO ,  Xue DONG ,  Xiaochuan CHEN ,  Yafeng YANG ,  Wei WANG ,  Jifeng TAN ,  Xiandong MENG

IPC: G02F1/29

Abstract: Disclosed is a lens device, including: a first transparent substrate; a second transparent substrate; and a liquid crystal layer filled therebetween. The first transparent substrate is a Fresnel lens, and a surface of the Fresnel lens toward the liquid crystal layer is disposed with grooves which are spaced from one another in accordance with Fresnel wave zones. The second transparent substrate is configured to control state of a liquid crystal, such that a refractive index of the liquid crystal, when polarized light incident into the liquid crystal passes through the liquid crystal, transforms between a first refractive index of the liquid crystal and a second refractive index of the liquid crystal, wherein the first refractive index is greater than the second refractive index, and a refractive index of the Fresnel lens is substantially equal to the first refractive index of the liquid crystal in the liquid crystal layer.