# US 11,307,464 B2 · Array substrate for reflective display panel, method for preparing the same and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,464 B2 - Document ID: US11307464B2 - Status: Granted - Kind: B2 - Application number: 16/561,837 - Filed: 2019-09-05 - Published: 2020-08-20 - Granted: 2022-04-19 - Earliest claimed: 2019-02-15 - Assignees: Hefei Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Hefei Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Inventors: Guanglei Yang; Zhixiang Fang - Web page: https://patentgrep.com/patent/US11307464B2 ## CPC - G02F 1/134309: {characterised by their geometrical arrangement} - G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making} - G02F 1/136209: {Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element} - G02F 1/133521: {Interference filters} - G02F 2201/121: common or background - G02F 2201/123: pixel - G02F 2203/02: reflective - 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 disclosure provides an array substrate for a reflective display panel, a method for preparing the same, and a display panel, the array substrate including a base and a pixel electrode and a structure for reflecting light arranged on the base, in which the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough. ## Claims ### Claim 1 An array substrate for a reflective display panel, comprising: a base; and a pixel electrode and a structure for reflecting light arranged on the base, wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough, wherein the structure for reflecting light is an aluminum film doped with non-ferrous metal ions, and wherein the aluminum film doped with non-ferrous metal ions comprises an aluminum film doped with cuprous ions, an aluminum film doped with ferrous ions, and an aluminum film doped with copper ions. ### Claim 2 (depends on 1) The array substrate of claim 1, wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base. ### Claim 3 (depends on 1) The array substrate of claim 1, wherein the pixel electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the pixel electrode proximate to the base. ### Claim 4 (depends on 1) The array substrate of claim 1, wherein the array substrate further comprises a common electrode, the common electrode is arranged on a surface of the pixel electrode away from the base, and the structure for reflecting light is arranged on a surface of the common electrode away from the base. ### Claim 5 (depends on 1) The array substrate of claim 1, wherein the array substrate further comprises a transparent common electrode, the common electrode is arranged on a surface of the pixel electrode away from the base, and the structure for reflecting light is arranged on a surface of the common electrode proximate to the base. ### Claim 6 (depends on 1) The array substrate of claim 1, wherein the array substrate further comprises a light absorbing layer arranged on a surface of the base away from the pixel electrode. ### Claim 7 (depends on 6) The array substrate of claim 6, wherein a material constituting the light absorbing layer is a black resin. ### Claim 8 (depends on 2) The array substrate of claim 2, wherein the pixel electrode has a function of absorbing light. ### Claim 9 (depends on 4) The array substrate of claim 4, wherein the common electrode has a function of absorbing light. ### Claim 10 (depends on 8) The array substrate of claim 8, wherein the common electrode comprises a transparent conductive oxide layer and a ferrous metal layer that are laminated. ### Claim 11 (depends on 9) The array substrate of claim 9, wherein the pixel electrode comprises a transparent conductive oxide layer and a ferrous metal layer that are laminated. ### Claim 12 (depends on 1) A method for preparing the array substrate for a reflective display panel of claim 1, comprising: forming the pixel electrode and the structure for reflecting light on the base by a patterning process, wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough. ### Claim 13 (depends on 12) The method of claim 12, wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base or on a surface of the pixel electrode proximate to the base, and the pixel electrode and the structure for reflecting light are formed by a same mask. ### Claim 14 (depends on 12) The method of claim 12, wherein the structure for reflecting light is arranged on a surface of the common electrode away from the base or on a surface of the common electrode proximate to the base, and the common electrode and the structure for reflecting light are formed by a same mask. ### Claim 15 (depends on 12) The method of claim 12, wherein the method further comprises: a step of forming a light absorbing layer on a surface of the base away from the pixel electrode. ### Claim 16 (depends on 1) A display panel, comprising an upper substrate and a lower substrate arranged opposite to each other, and a liquid crystal layer arranged between the lower substrate and the upper substrate, wherein the lower substrate is the array substrate of claim 1. ### Claim 17 (depends on 16) The display panel of claim 16, wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base; or the pixel electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the pixel electrode proximate to the base. ### Claim 18 (depends on 16) The display panel of claim 16, wherein the array substrate further comprises a common electrode, and the common electrode is arranged on a surface of the pixel electrode away from the base, and wherein the structure for reflecting light is arranged on a surface of the common electrode away from the base; or the common electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the common electrode proximate to the base. ### Claim 19 An array substrate for a reflective display panel, comprising: a base; and a pixel electrode and a structure for reflecting light arranged on the base, wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough, wherein the structure for reflecting light is a polymer film composed of a plurality of stacked polymer layers, and wherein each polymer layer in the polymer film has a reflectivity to the light at the predetermined wavelength greater than a reflectivity to the light other than the light at the predetermined wavelength, and a thickness of a quarter of the predetermined wavelength, and a refractive index of the polymer layers gradually decreases in a direction from the base to the polymer film.