# US 8,854,591 B2 · Display panel and method for narrowing edges and increasing edge strength thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,854,591 B2 - Document ID: US8854591B2 - Status: Granted - Kind: B2 - Application number: 12/710,688 - Filed: 2010-02-23 - Published: 2011-02-03 - Granted: 2014-10-07 - Earliest claimed: 2009-07-30 - Assignees: Au Optronics Corporation - Applicants: Yu Chen Liu; Chung Wei Liu; Shu Chih Wang; Chia Shin Weng - Inventors: Yu Chen Liu; Chung Wei Liu; Shu Chih Wang; Chia Shin Weng - Web page: https://patentgrep.com/patent/US8854591B2 ## CPC - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/1341: Filling or closing of cells - B24B 9/06: of non-metallic inorganic material, e.g. stone, ceramics, porcelain - G02F 1/133388: {with constructional differences between the display region and the peripheral region} - H01J 2209/267: shaped surfaces or flanges - Y10T 83/04: Processes - Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] - 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 - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An edge narrowing method for a display panel is disclosed. The display panel includes a first substrate, a second substrate, a sealant and a light-shielding area. The sealant is disposed between the first substrate and the second substrate. The light-shielding area is disposed between the first substrate and the sealant. The method includes the steps of providing the display panel, a grinding apparatus and a polishing apparatus; tilting the display panel so that the first substrate and a grinding member of the grinding apparatus have a first grinding angle therebetween; grinding the first substrate and the light-shielding area with the grinding apparatus while the display panel is tilted at the first grinding angle, thereby forming a first grinding end surface; stopping grinding of the first substrate and the light-shielding area when the width of the light-shielding area is between 0.35 and 1 mm; and polishing the first grinding end surface with the polishing apparatus to form a first end surface. ## Claims ### Claim 1 A display panel, comprising: a first substrate; a second substrate disposed opposite to the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; a first photo spacer disposed on the first substrate and between the first substrate and the second substrate; a second photo spacer disposed on the first substrate and between the first substrate and the second substrate, and the second photo spacer and the first photo spacer forming a trench therebetween; and a sealant disposed between the first substrate and the second substrate and within the trench; wherein the first photo spacer is placed outside the sealant and far from the liquid crystal layer, the second photo spacer is placed inside the sealant and next to the liquid crystal layer, the first photo spacer and the first substrate and the second substrate at a corresponding position form an end surface going from the first substrate, the first photo spacer and the second substrate, and the end surfaces of the first substrate, the first photo spacer and the second substrate are coplanar. ### Claim 2 (depends on 1) The display panel of claim 1, wherein the first photo spacer and the second substrate form a first gap, and the second photo spacer and the second substrate form a second gap. ### Claim 3 A display panel, comprising: a first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; a first photo spacer disposed on the first substrate and between the first substrate and the second substrate; a second photo spacer disposed on the first substrate and between the first substrate and the second substrate, and the second photo spacer and the first photo spacer forming a trench therebetween; and a sealant disposed between the first substrate and the second substrate and within the trench; wherein the first photo spacer is placed outside the sealant and far from the liquid crystal layer, the second photo spacer is placed inside the sealant and next to the liquid crystal layer; and wherein each of the first photo spacer and the first substrate comprises an end surface, and the end surface of the first photo spacer is connected to and flush with the end surfaces of the first photo spacer.