# US 11,906,838 B2 · Display module, method of manufacturing the same, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,838 B2 - Document ID: US11906838B2 - Status: Granted - Kind: B2 - Application number: 17/770,262 - Filed: 2021-06-15 - Published: 2022-12-08 - Granted: 2024-02-20 - Earliest claimed: 2020-06-17 - Assignees: Boe Technology Group Co., Ltd. - Applicants: BOE Technology Group Co., Ltd. - Inventors: Dejiang Zhao; Lu Wang - Web page: https://patentgrep.com/patent/US11906838B2 ## CPC - G02F 1/133524: {Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides} - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - G02F 1/133377: {Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel} - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - 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 A display module, a method of manufacturing the same, and a display device are provided. The display module comprises: a light guide plate; a blue light source, disposed at the light entering face of the light guide plate; and a display panel, disposed at a side of the light exiting face of the light guide plate, the display panel comprises a plurality of display units, and adjacent display units are spaced apart with a light shielding barrier wall; each display unit comprises a quantum dot unit and a liquid crystal unit arranged side by side, and the liquid crystal unit and the quantum dot unit are spaced apart with a transparent barrier wall; a side of the liquid crystal unit away from the light guide plate is provided with a first light shielding pattern. ## Claims ### Claim 1 A display module, comprising: a light guide plate, the light guide plate comprising a light entering face and a light exiting face adjacent to each other; a blue light source, disposed at the light entering face of the light guide plate; and a display panel, disposed at a side of the light exiting face of the light guide plate; wherein the display panel comprises a plurality of display units and a light shielding barrier wall which separates adjacent display units; each of the plurality of display units comprises a quantum dot unit, a liquid crystal unit, a transparent barrier wall and a first light shielding pattern, the quantum dot unit and the liquid crystal unit are arranged in parallel with each other along a lateral direction, the transparent barrier wall separates the liquid crystal unit from the quantum dot unit, and the first light shielding pattern is arranged at a side of the liquid crystal unit away from the light guide plate; an orthographic projection of the liquid crystal unit onto the light guide plate is located within an orthographic projection of the first light shielding pattern onto the light guide plate, and an orthographic projection of the quantum dot unit onto the light guide plate overlaps with an orthographic projection of a gap between adjacent first light shielding patterns onto the light guide plate. ### Claim 2 (depends on 1) The display module according to claim 1, wherein the display panel further comprises: a light propagation direction changing structure, arranged at a side of the liquid crystal unit facing towards the light guide plate, the light propagation direction changing structure is configured to deflect an incoming vertical light. ### Claim 3 (depends on 2) The display module according to claim 2, wherein the display panel further comprises: a passivation layer, located between the light propagation direction changing structure and the liquid crystal unit; and a driving electrode, located between the passivation layer and the liquid crystal unit and the driving electrode being configured to drive a deflection of liquid crystal in the liquid crystal unit; wherein a refractive index of the light propagation direction changing structure is greater than a refractive index of the passivation layer, the refractive index of the passivation layer is greater than a refractive index of the driving electrode, and the refractive index of the driving electrode is greater than a refractive index of the liquid crystal. ### Claim 4 (depends on 2) The display module according to claim 2, wherein the light propagation direction changing structure comprises a plurality of wedge structures arranged in parallel, the plurality of wedge structure each has a height of 1.5 μm to 3 μm. ### Claim 5 (depends on 1) The display module according to claim 1, wherein, a plurality of second light shielding patterns arranged at intervals is disposed at the light exiting face of the light guide plate, the orthographic projection of the quantum dot unit onto the light guide plate is located within an orthographic projection of a corresponding second light shielding pattern onto the light guide plate, and the orthographic projection of the liquid crystal unit onto the light guide plate overlaps with an orthographic projection of a gap between adjacent second light shielding patterns onto the light guide plate. ### Claim 6 (depends on 5) The display module according to claim 5, wherein an orthographic projection of the transparent barrier wall onto the light guide plate is located within the orthographic projection of the corresponding second light shielding pattern onto the light guide plate. ### Claim 7 (depends on 6) The display module according to claim 6, wherein the orthographic projection of the transparent barrier wall onto the light guide plate is located within the orthographic projection of the first light shielding pattern onto the light guide plate. ### Claim 8 (depends on 1) The display module according to claim 1, wherein a thickness of the first light shielding pattern is 1.5 μm to 2 μm. ### Claim 9 (depends on 1) The display module according to claim 1, wherein a wavelength of light emitted by the blue light source is less than 410 nm. ### Claim 10 (depends on 1) The display module according to claim 1, wherein a weight percentage of scattering particles in the quantum dot unit is 1% to 5%. ### Claim 11 (depends on 1) The display module according to claim 1, wherein in each of the plurality of display units, the quantum dot unit and the liquid crystal unit arranged in parallel with each other along a lateral direction, and the transparent barrier wall are surrounded by the light shielding barrier wall. ### Claim 12 (depends on 11) The display module according to claim 11, wherein in each of the plurality of display units, the first light shielding pattern covers the side of the liquid crystal unit away from the light guide plate and a side of the transparent barrier wall away from the light guide plate. ### Claim 13 A display device, comprising a display module, wherein the display module comprises: a light guide plate, wherein the light guide plate comprises a light entering face and a light exiting face adjacent to each other; a blue light source, disposed at the light entering face of the light guide plate; and a display panel, disposed at a side of the light exiting face of the light guide plate; wherein the display panel comprises a plurality of display units and a light shielding barrier wall which separates adjacent display units; each of the plurality of display units comprises a quantum dot unit, a liquid crystal unit, a transparent barrier wall and a first light shielding pattern, the quantum dot unit and the liquid crystal unit are arranged in parallel with each other along a lateral direction, the transparent barrier wall separates the liquid crystal unit from the quantum dot unit, and the first light shielding pattern is arranged at a side of the liquid crystal unit away from the light guide plate; an orthographic projection of the liquid crystal unit onto the light guide plate is located within an orthographic projection of the first light shielding pattern onto the light guide plate, and an orthographic projection of the quantum dot unit onto the light guide plate overlaps with an orthographic projection of a gap between adjacent first light shielding patterns onto the light guide plate. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the display panel further comprises: a light propagation direction changing structure, arranged at a side of the liquid crystal unit facing towards the light guide plate, the light propagation direction changing structure being configured to deflect an incoming vertical light. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the display panel further comprises: a passivation layer, located between the light propagation direction changing structure and the liquid crystal unit; a driving electrode, located between the passivation layer and the liquid crystal unit, the driving electrode being configured to drive a deflection of liquid crystal in the liquid crystal unit; wherein a refractive index of the light propagation direction changing structure is greater than a refractive index of the passivation layer, the refractive index of the passivation layer is greater than a refractive index of the driving electrode, and the refractive index of the driving electrode is greater than a refractive index of the liquid crystal. ### Claim 16 (depends on 15) The display device according to claim 15, further comprising a processor; wherein the processor is configured to adjust an angle of the deflection of the liquid crystal to adjust a luminous intensity of the quantum dot unit by controlling a voltage applied to the liquid crystal unit via the driving electrode. ### Claim 17 A method for manufacturing a display module, comprising: providing a light guide plate, wherein the light guide plate comprises a light entering face and a light exiting face adjacent to each other; forming a blue light source at the light entering face of the light guide plate; and forming a display panel at a side of the light exiting face of the light guide plate, wherein the display panel comprises a plurality of display units, and adjacent display units are separated by a light shielding barrier wall; each display unit of the plurality of display units comprises a quantum dot unit and a liquid crystal unit arranged in parallel with each other along a lateral direction, the liquid crystal unit and the quantum dot unit are separated by a transparent barrier wall, a first light shielding pattern is disposed at a side of the liquid crystal unit away from the light guide plate, and an orthographic projection of the liquid crystal unit onto the light guide plate is located within an orthographic projection of the first light shielding pattern onto the light guide plate. ### Claim 18 (depends on 13) The display device according to claim 13, wherein, a plurality of second light shielding patterns arranged at intervals is disposed at the light exiting face of the light guide plate, the orthographic projection of the quantum dot unit onto the light guide plate is located within an orthographic projection of a corresponding second light shielding pattern onto the light guide plate, and the orthographic projection of the liquid crystal unit onto the light guide plate overlaps with an orthographic projection of a gap between adjacent second light shielding patterns onto the light guide plate. ### Claim 19 (depends on 18) The display device according to claim 18, wherein an orthographic projection of the transparent barrier wall onto the light guide plate is located within the orthographic projection of the corresponding second light shielding pattern onto the light guide plate. ### Claim 20 (depends on 13) The display device according to claim 13, wherein in each of the plurality of display units, the quantum dot unit and the liquid crystal unit arranged in parallel with each other along a lateral direction, and the transparent barrier wall are surrounded by the light shielding barrier wall.