# US 2021/0333902 A1 · Touch display device and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0333902 A1 - Document ID: US20210333902A1 - Status: Published application - Kind: A1 - Application number: 16/626,527 - Filed: 2019-12-06 - Published: 2021-10-28 - Earliest claimed: 2019-10-12 - Assignees: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Mingjun ZHOU; Zhenhua SHI - Web page: https://patentgrep.com/patent/US20210333902A1 ## CPC - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 7/14: applied in spaced arrangements, e.g. in stripes - B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} - B32B 37/1207: {Heat-activated adhesive (B32B37/04 takes precedence)} - B32B 37/1292: {selectively, e.g. in stripes, in patterns (B32B37/0076 takes precedence)} - B32B 37/0015: {to avoid warp or curl} - B32B 37/12: characterised by using adhesives - B32B 37/144: {using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding (constructional features for tensioning B32B38/1825)} - B32B 2037/1215: {Hot-melt adhesive} - B32B 2037/1253: {curable adhesive} - B32B 2250/44: Number of layers variable across the laminate - B32B 2309/68: Vacuum - B32B 2310/08: by wave energy or particle radiation - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - B32B 2457/202: LCD, i.e. liquid crystal displays - B32B 2457/206: Organic displays, e.g. OLED - B32B 2457/208: Touch screens - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A touch display device and a manufacturing method thereof are provided. During a panel bonding process, a display panel and a touch panel are adhered by a liquid optical clear adhesive using a full lamination technology. A cover is then adhered to the touch panel by a solid optically clear adhesive using a frame bonding technology to form a vacuum chamber. The cover, the touch panel, and the display panel in the formed touch display device are closely adhered to each other. Moreover, an optical adhesive material is effectively saved. ## Claims ### Claim 1 A manufacturing method of a touch display device, comprising: providing a display panel; covering an upper surface of the display panel with a full-surface adhesive layer, wherein the full-surface adhesive layer comprises a liquid optical clear adhesive; disposing a touch panel on the upper surface of the display panel, so that the touch panel corresponds to a middle of the display panel, and a lower surface of the touch panel is attached to an upper surface of the full-surface adhesive layer; attaching a first sub frame adhesive layer to an edge of an upper surface of the touch panel, wherein the first sub frame adhesive layer comprises a liquid adhesive; cutting a solid optically clear adhesive into an adhesive strip and attaching the adhesive strip to an upper surface of the first sub frame adhesive layer, wherein a width of the adhesive strip is less than a width of the first sub frame adhesive layer; disposing a cover on the upper surface of the touch panel, so that the cover corresponds to a middle portion of the touch panel, and an upper surface of the adhesive strip is attached to a lower surface of the cover; heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer under a vacuum environment, so that the adhesive strip is melted; and irradiating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer with ultraviolet ray under the vacuum environment such that the full-surface adhesive layer is cured, and the melted adhesive strip is cured into a second sub frame adhesive layer, and a vacuum chamber is formed on middle portions of the first sub frame adhesive layer and the second sub frame adhesive layer. ### Claim 2 (depends on 1) The manufacturing method as claimed in claim 1, wherein the touch panel and the display panel are adhered by the liquid optical clear adhesive using a full lamination technology. ### Claim 3 (depends on 1) The manufacturing method as claimed in claim 1, wherein the step of cutting the solid optically clear adhesive into the adhesive strip and attaching the adhesive strip to the upper surface of the first sub frame adhesive layer further comprises: cutting the solid optically clear adhesive into four adhesive strips; connecting the four adhesive strips in end-to-end relation to form a ring-shaped; and attaching the ring-shaped adhesive strips to the upper surface of the first sub frame adhesive layer. ### Claim 4 (depends on 1) The manufacturing method as claimed in claim 1, wherein the step of heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer under the vacuum environment, so that the adhesive strip is melted, further comprises: transferring the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer to a vacuum apparatus; vacuuming the vacuum apparatus in a sealed environment using a vacuum pump; and heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer using a heating module of the vacuum apparatus, so that the adhesive strip is melted. ### Claim 5 (depends on 1) The manufacturing method as claimed in claim 1, wherein a width of the second sub frame adhesive layer is less than or equal to a width of the first sub frame adhesive layer. ### Claim 6 (depends on 1) The manufacturing method as claimed in claim 1, wherein a shape of the touch panel is the same as a shape of the display panel, and a size of the touch panel is the same as a size of the display panel. ### Claim 7 A touch display device, comprising: a display panel; a full-surface adhesive layer covering an upper surface of the display panel; a touch panel attached to an upper surface of the full-surface adhesive layer, wherein the touch panel corresponds to a middle portion of the display panel; a frame adhesive layer attached to an edge of an upper surface of the touch panel; a vacuum chamber formed on a middle portion of the frame adhesive layer; and a cover attached to an upper surface of the frame adhesive layer, wherein the cover corresponds to a middle portion of the touch panel. ### Claim 8 (depends on 7) The touch display device as claimed in claim 7, wherein the full-surface adhesive layer comprises a liquid optical clear adhesive, and the touch panel and the display panel are adhered by the liquid optical clear adhesive using a full lamination technology; and the frame adhesive layer comprises a solid optically clear adhesive, and the cover and the touch panel are adhered by the solid optically clear adhesive using a frame bonding technology. ### Claim 9 (depends on 7) The touch display device as claimed in claim 7, wherein the frame adhesive layer comprises: a first sub frame adhesive layer attached to the edge of the upper surface of the touch panel; and a second sub frame adhesive layer attached to an upper surface of the first sub frame adhesive layer, wherein the vacuum chamber is formed on middle portions of the first sub frame adhesive layer and the second sub frame adhesive layer. ### Claim 10 (depends on 9) The touch display device as claimed in claim 9, wherein the first sub frame adhesive layer comprises a liquid adhesive or a solid adhesive; and the second sub frame adhesive layer comprises a solid optically clear adhesive, and a width of the second sub frame adhesive layer is less than or equal to a width of the first sub frame adhesive layer. ### Claim 11 (depends on 9) The touch display device as claimed in claim 9, wherein a shape of the second sub frame adhesive layer comprises a ring-shaped. ### Claim 12 (depends on 7) The touch display device as claimed in claim 7, wherein a shape of the touch panel is the same as a shape of the display panel, and a size of the touch panel is the same as a size of the display panel. ### Claim 13 A manufacturing method of a touch display device, comprising: providing a display panel; covering an upper surface of the display panel with a full-surface adhesive layer; disposing a touch panel on the upper surface of the display panel, so that the touch panel corresponds to a middle portion of the display panel, and a lower surface of the touch panel is attached to an upper surface of the full-surface adhesive layer; attaching a frame adhesive layer to an edge of an upper surface of the touch panel; disposing a cover on the upper surface of the touch panel, so that the cover corresponds to a middle portion of the touch panel, and an upper surface of the frame adhesive layer is attached to a lower surface of the cover; and irradiating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer with ultraviolet ray under a vacuum environment such that the full-surface adhesive layer and the frame adhesive layer are cured, and a vacuum chamber is formed on a middle portion of the frame adhesive layer. ### Claim 14 (depends on 13) The manufacturing method as claimed in claim 13, wherein the full-surface adhesive layer comprises a liquid optical clear adhesive, and the touch panel and the display panel are adhered by the liquid optical clear adhesive using a full lamination technology; and the frame adhesive layer comprises a solid optically clear adhesive, and the cover and the touch panel are adhered by the solid optically clear adhesive using frame bonding technology. ### Claim 15 (depends on 13) The manufacturing method as claimed in claim 13, wherein the step of attaching the frame adhesive layer to the edge of the upper surface of the touch panel comprises: attaching a first sub frame adhesive layer to the edge of the upper surface of the touch panel, cutting a solid optically clear adhesive into an adhesive strip, and attaching the adhesive strip to an upper surface of the first sub frame adhesive layer; and the steps of irradiating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer with ultraviolet ray under the vacuum environment such that the full-surface adhesive layer and the frame adhesive layer are cured, and the vacuum chamber is formed on the middle portion of the frame adhesive layer, further comprises: heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer under the vacuum environment, so that the adhesive strip is melted; and irradiating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer with ultraviolet ray under the vacuum environment such that the full-surface adhesive layer is cured, and the melted adhesive strip is cured into a second sub frame adhesive layer, and the vacuum chamber is formed on middle portions of the first sub frame adhesive layer and the second sub frame adhesive layer. ### Claim 16 (depends on 15) The manufacturing method as claimed in claim 15, wherein the steps of cutting the solid optically clear adhesive into an adhesive strip, and attaching the adhesive strip to the upper surface of the first sub frame adhesive layer further comprises: cutting the solid optically clear adhesive into four adhesive strips; connecting the four adhesive strips in end-to-end relation to form a ring-shaped; and attaching the ring-shaped adhesive strips to the upper surface of the first sub frame adhesive layer. ### Claim 17 (depends on 15) The manufacturing method as claimed in claim 15, wherein the step of heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer under the vacuum environment, so that the adhesive strip is melted, further comprises: transferring the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer to a vacuum apparatus; vacuuming the vacuum apparatus in a sealed environment using a vacuum pump; and heating the cover, the touch panel, and the display panel which are attached with the corresponding adhesive layer using a heating module of the vacuum apparatus, so that the adhesive strip is melted. ### Claim 18 (depends on 15) The manufacturing method as claimed in claim 15, wherein the first sub frame adhesive layer comprises a liquid adhesive or a solid adhesive, and a width of the second sub frame adhesive layer is less than or equal to a width of the first sub frame adhesive layer.