# US 11,029,553 B2 · Optical composite film, display panel, 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 11,029,553 B2 - Document ID: US11029553B2 - Status: Granted - Kind: B2 - Application number: 17/042,502 - Filed: 2018-11-30 - Published: 2021-01-28 - Granted: 2021-06-08 - Earliest claimed: 2018-10-30 - Assignees: Hkc Corporation Limited; Chongqing Hkc Optoelectronics Technology Co., Ltd. - Applicants: HKC Corporation Limited; Chongqing Hkc Optoelectronics Technology Co., Ltd. - Inventors: Chih Tsung Kang - Web page: https://patentgrep.com/patent/US11029553B2 ## CPC - G02F 1/133507: {Films for enhancing the luminance} - G02F 1/133502: {Antiglare, refractive index matching layers} - G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/133548: {Wire-grid polarisers} - 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 An optical composite film includes a first optically-uniaxial optical film layer, a second optically-uniaxial optical film layer, and a reflection grating film layer. The first optically-uniaxial optical film layer includes a plate-shaped portion and a plurality of refraction portions disposed on a side of the plate-shaped portion, the plurality of refraction portions is selected from a type of camber columns and quadrangular prisms, the second optically-uniaxial optical film layer is stacked on a side of the plate-shaped portion close to the refraction portion, an extraordinary light refractive index of the first optically-uniaxial optical film layer is greater than an ordinary light refractive index of the second optically-uniaxial optical film layer, and a material of the first optically-uniaxial optical film layer is the same as a material of the second optically-uniaxial optical film layer. ## Claims ### Claim 1 An optical composite film, comprising: a first optically-uniaxial optical film layer, comprising a plate-shaped portion and a plurality of refraction portions disposed on a side of the plate-shaped portion, wherein the plurality of refraction portions is selected from one type of camber columns and quadrangular prisms, and when the plurality of refraction portions is the camber columns, the refraction portion has a plurality of side surfaces, one of the plurality of side surfaces is an arc-shaped convex surface, and a side surface of the refraction portion away from the arc-shaped convex surface is laminated to the plate-shaped portion; and when the plurality of refraction portions is the quadrangular prisms, a side surface of the refraction portion is laminated to the plate-shaped portion; a second optically-uniaxial optical film layer, stacked on a side of the plate-shaped portion close to the refraction portion, wherein the plurality of refraction portions is accommodated in the second optically-uniaxial optical film layer, an extraordinary light refractive index of the first optically-uniaxial optical film layer is greater than an ordinary light refractive index of the second optically-uniaxial optical film layer, and a material of the first optically-uniaxial optical film layer is the same as a material of the second optically-uniaxial optical film layer; and a reflection grating film layer, disposed on a side of the second optically-uniaxial optical film layer away from the first optically-uniaxial optical film layer. ### Claim 2 (depends on 1) The optical composite film according to claim 1, wherein each of a material of the first optically-uniaxial optical film layer and a material of the second optically-uniaxial optical film layer is a nematic-phase liquid crystal molecule material. ### Claim 3 (depends on 1) The optical composite film according to claim 1, wherein the extraordinary light refractive index of the first optically-uniaxial optical film layer is 1.0 to 2.5. ### Claim 4 (depends on 1) The optical composite film according to claim 1, wherein the ordinary light refractive index of the second optically-uniaxial optical film layer is 1.0 to 2.5. ### Claim 5 (depends on 1) The optical composite film according to claim 1, wherein a difference between the extraordinary light refractive index of the first optically-uniaxial optical film layer and the ordinary light refractive index of the second optically-uniaxial optical film layer is 0.01 to 2. ### Claim 6 (depends on 1) The optical composite film according to claim 1, wherein the arc-shaped convex surface is a curved surface formed when a circular arc line is moved along an extension direction of the refraction portion. ### Claim 7 (depends on 1) The optical composite film according to claim 1, wherein the plurality of refraction portions is the camber columns, the plurality of refraction portions is arranged along a straight line, and extension directions of the plurality of refraction portions are parallel. ### Claim 8 (depends on 1) The optical composite film according to claim 1, wherein the plurality of refraction portions is the camber columns, the plurality of refraction portions is arranged in a two-dimensional matrix, and two neighboring refraction portions are disposed at an interval. ### Claim 9 (depends on 1) The optical composite film according to claim 1, wherein the plurality of refraction portions is the quadrangular prisms, the plurality of refraction portions is arranged along a straight line, extension directions of the plurality of refraction portions are parallel, and two neighboring refraction portions are disposed at an interval. ### Claim 10 (depends on 1) The optical composite film according to claim 1, wherein the plurality of refraction portions is the quadrangular prisms, the plurality of refraction portions is arranged in a two-dimensional matrix, and two neighboring refraction portions are disposed at an interval. ### Claim 11 (depends on 1) The optical composite film according to claim 1, wherein the reflection grating film layer comprises a transparent substrate and a plurality of strip-shaped metal layers disposed on the transparent substrate, and the plurality of metal layers is disposed at intervals and in parallel. ### Claim 12 (depends on 11) The optical composite film according to claim 11, wherein the width of the metal layer is 50 nm to 150 nm, the thickness of the metal layer is 100 nm to 200 nm, and a spacing between two neighboring metal layers is 100 nm to 200 nm. ### Claim 13 (depends on 1) The optical composite film according to claim 1, wherein the extraordinary light refractive index of the first optically-uniaxial optical film layer is 1.0 to 2.5, the ordinary light refractive index of the second optically-uniaxial optical film layer is 1.0 to 2.5, and a difference between the extraordinary light refractive index of the first optically-uniaxial optical film layer and the ordinary light refractive index of the second optically-uniaxial optical film layer is 0.01 to 2. ### Claim 14 (depends on 1) A display panel, comprising the optical composite film according to claim 1, a first glass film layer, a first indium tin oxide film layer, a liquid crystal layer, a second indium tin oxide film layer, a metal grating film layer, a second glass film layer, and a photoresist layer, wherein the reflection grating film layer, the first glass film layer, the first indium tin oxide film layer, the liquid crystal layer, the second indium tin oxide film layer, the metal grating film layer, and the second glass film layer are sequentially stacked, and the photoresist layer is stacked between the metal grating film layer and the second glass film layer, or the photoresist layer is stacked between the first glass film layer and the first indium tin oxide film layer. ### Claim 15 (depends on 14) The display panel according to claim 14, wherein the photoresist layer is stacked between the metal grating film layer and the second glass film layer, the display panel further comprises a compensation film layer, and the compensation film layer is stacked between the second indium tin oxide film layer and the metal grating film layer. ### Claim 16 (depends on 14) The display panel according to claim 14, wherein the photoresist layer is stacked between the metal grating film layer and the second glass film layer, the display panel further comprises a compensation film layer, and the compensation film layer is stacked between the first glass film layer and the first indium tin oxide film layer. ### Claim 17 (depends on 14) The display panel according to claim 14, wherein the photoresist layer is stacked between the metal grating film layer and the second glass film layer, the display panel further comprises compensation film layers, a quantity of the compensation film layers is two, one of the two compensation film layers is stacked between the second indium tin oxide film layer and the metal grating film layer, and the other is stacked between the first glass film layer and the first indium tin oxide film layer. ### Claim 18 (depends on 14) The display panel according to claim 14, wherein the photoresist layer is stacked between the first glass film layer and the first indium tin oxide film layer, the display panel further comprises a compensation film layer, and the compensation film layer is stacked between the second indium tin oxide film layer and the metal grating film layer; or the compensation film layer is stacked between the photoresist layer and the first glass film layer. ### Claim 19 (depends on 18) The display panel according to claim 18, wherein a quantity of compensation film layers is two, one of the two compensation film layers is stacked between the second indium tin oxide film layer and the metal grating film layer, and the other is stacked between the photoresist layer and the first glass film layer. ### Claim 20 (depends on 14) A display device, comprising a backlight source and the display panel according to claim 14, wherein the backlight source is located on a side of the display panel.