# US 2024/0201532 A1 · Liquid crystal display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201532 A1 - Document ID: US20240201532A1 - Status: Published application - Kind: A1 - Application number: 18/591,459 - Filed: 2024-02-29 - Published: 2024-06-20 - Earliest claimed: 2020-07-08 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Bingkun YIN; Changchih HUANG; Guanghui LIU - Web page: https://patentgrep.com/patent/US20240201532A1 ## CPC - G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide} - G02F 1/133357: {Planarisation layers} - G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)} - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces} - G02F 1/133302: {Rigid substrates, e.g. inorganic substrates} - G02F 1/133624: {characterised by their spectral emissions} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract The present application discloses a liquid crystal display panel and a method of manufacturing the same. The liquid crystal display panel includes a pixel area, and further includes: a glass substrate serving as a light guide plate; a reflective layer disposed on a side of the light guide plate; a grating structure disposed on a side of the light guide plate away from the reflective layer, and corresponding to the pixel area; a planarization layer disposed on a side of the grating structure away from the light guide plate; and a thin-film transistor layer disposed on a side of the planarization layer away from the light guide plate. ## Claims ### Claim 1 A liquid crystal display panel, comprising a pixel area comprising a plurality of sub-pixels of different colors, wherein the liquid crystal display panel comprises: a glass substrate; a grating structure disposed on the glass substrate, comprising a plurality of sub-gratings corresponding one-to-one to the plurality of the sub-pixels of different colors, and each of the sub-gratings comprising a plurality of layers with a same thickness; a planarization layer disposed on the grating structure and covering the grating structure; a thin-film transistor layer disposed on the planarization layer; and a liquid crystal layer disposed on the thin-film transistor layer; wherein thicknesses and refractive indexes of ones of the plurality of the sub-gratings corresponding to ones of the plurality of the sub-pixels of different colors are different. ### Claim 2 (depends on 1) The liquid crystal display panel according to claim 1, wherein the plurality of the sub-pixels of different colors comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and thicknesses and refractive indexes of ones of the plurality of the sub-gratings respectively corresponding to the red sub-pixel, the green sub-pixel, and the blue sub-pixel are different. ### Claim 3 (depends on 1) The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel further comprises a plurality of light-shielding layers, and each of the light-shielding layers is disposed between adjacent two of the plurality of the sub-gratings. ### Claim 4 (depends on 3) The liquid crystal display panel according to claim 3, wherein the plurality of the light-shielding layers are disposed in a same layer as the grating structure on the glass substrate. ### Claim 5 (depends on 3) The liquid crystal display panel according to claim 3, wherein a material of the plurality of the light-shielding layers is an opaque material or a light-reflecting material. ### Claim 6 (depends on 2) The liquid crystal display panel according to claim 2, wherein a wavelength of emitted light from one of the plurality of the sub-gratings corresponding to the red sub-pixel ranges from 580 nm to 660 nm, a wavelength of emitted light from one of the plurality of the sub-gratings corresponding to the green sub-pixel ranges from 500 nm to 580 nm, and a wavelength of emitted light from one of the plurality of the sub-gratings corresponding to the blue sub-pixel ranges from 440 nm to 500 nm. ### Claim 7 (depends on 1) The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel further comprises a reflective layer, the reflective layer is disposed on a side of the glass substrate away from the grating structure. ### Claim 8 (depends on 7) The liquid crystal display panel according to claim 7, wherein the glass substrate is reused as a light guide plate, and a light source is disposed facing toward a sidewall of the glass substrate. ### Claim 9 (depends on 1) The liquid crystal display panel according to claim 1, wherein a material of the plurality of the sub-gratings comprises silicon oxide doped with a photosensitive material. ### Claim 10 (depends on 1) The liquid crystal display panel according to claim 1, wherein a width of one of the plurality of the sub-gratings is equal to a width of a corresponding one of the plurality of the sub-pixels. ### Claim 11 (depends on 1) The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel further comprises a lower polarizer and an upper polarizer disposed on opposite sides of the liquid crystal layer, the lower polarizer is disposed on a side of the liquid crystal layer close to the thin film transistor, and the upper polarizer is disposed on a side of the liquid crystal layer away from the thin film transistor layer.