# US 2023/0054985 A1 · Liquid crystal display panel 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 2023/0054985 A1 - Document ID: US20230054985A1 - Status: Published application - Kind: A1 - Application number: 16/754,761 - Filed: 2020-03-06 - Published: 2023-02-23 - Earliest claimed: 2020-02-21 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Yuan SHAO; Chunqiu YAN; Hsiaohsien CHEN - Web page: https://patentgrep.com/patent/US20230054985A1 ## CPC - G02F 1/13396: {Spacers having different sizes} - G02F 1/133354: {Arrangements for aligning or assembling substrates} - G02F 1/13394: {spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence)} - G02F 1/13398: {Spacer materials; Spacer properties} - 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 application provides a liquid crystal display panel and a manufacturing thereof. The liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, and support posts. Each of the support posts includes a support post body and an expandable auxiliary pad. In a first state, the auxiliary pad is in a non-expanded state, and in a second state, the auxiliary pad is in an expanded state. This compensates for a height difference caused by the support post body which cannot be restored after being compressed by an external force and relieves a problem of appearance of Mura in the liquid crystal display panel. ## Claims ### Claim 1 A liquid crystal display panel, comprising: a first substrate; a second substrate; a liquid crystal layer filled between the first substrate and the second substrate; and support posts disposed between the first substrate and the second substrate configured to support the first substrate and the second substrate and ensure a distance between the first substrate and the second substrate, wherein each of the support posts comprises a support post body and an expandable auxiliary pad; wherein in a first state, the auxiliary pad is in a non-expanded state, and in a second state, the auxiliary pad is in an expanded state. ### Claim 2 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein the support post body and the auxiliary pad are disposed on the first substrate. ### Claim 3 (depends on 2) The liquid crystal display panel as claimed in claim 2, wherein the auxiliary pad is disposed on a side of the first substrate near the second substrate, and the support post body is disposed on a side of the auxiliary pad near the second substrate. ### Claim 4 (depends on 2) The liquid crystal display panel as claimed in claim 2, wherein the support post body is disposed on a side of the first substrate near the second substrate, and the auxiliary pad is disposed on a side of the support post body near the second substrate. ### Claim 5 (depends on 2) The liquid crystal display panel as claimed in claim 2, wherein the support post body is disposed on the first substrate, the auxiliary pad is disposed on the second substrate, and the support post body is disposed opposite to the auxiliary pad. ### Claim 6 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein material of the auxiliary pad comprises an expansive material. ### Claim 7 (depends on 6) The liquid crystal display panel as claimed in claim 6, wherein the expansive material comprises cesium-doped lead triiodide perovskite mixed with organic cations. ### Claim 8 (depends on 7) The liquid crystal display panel as claimed in claim 7, wherein the cesium-doped lead triiodide perovskite mixed with organic cations is present in an amount of 10 to 80% of an overall mass of the auxiliary pad. ### Claim 9 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein the auxiliary pad is a cube block with a thickness ranging from 0.1 to 5 um and a width ranging from 20 to 200 um. ### Claim 10 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein the support post body is a circular column or a circular stage with a height ranging from 1 to 10 um and a diameter ranging from 5 to 100 um. ### Claim 11 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein a width of the auxiliary pad is 2 to 10 um greater than a cross-sectional diameter of a contact area between the support post body and the auxiliary pad. ### Claim 12 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein the support posts comprise a primary support post and a secondary support post, the primary support post comprises a primary support post body and an expandable auxiliary pad, and the secondary support post comprises a secondary support post body. ### Claim 13 (depends on 1) The liquid crystal display panel as claimed in claim 1, wherein the support posts comprise a primary support post and a secondary support post, the primary support post comprises a primary support post body and an expandable primary auxiliary pad, and the secondary support post comprises a secondary support post body and an expandable secondary auxiliary pad. ### Claim 14 A manufacturing method of a liquid crystal display panel, comprising: forming a first substrate and a second substrate; forming support posts, wherein each of the support posts comprises a support post body and an expandable auxiliary pad, in a first state, the auxiliary pad is in a non-expanded state, and in a second state, the auxiliary pad is changed from the non-expanded state to an expanded state; and assembling the first substrate and the second substrate face to face. ### Claim 15 (depends on 14) The manufacturing method of the liquid crystal display panel as claimed in claim 14, wherein forming the support posts comprises: mixing an expansive material into a photoresist material in a predetermined ratio to form a material for the auxiliary pad; and forming the auxiliary pad and the support post pad. ### Claim 16 (depends on 15) The manufacturing method of the liquid crystal display panel as claimed in claim 15, wherein forming the auxiliary pad and the support post pad comprises: forming the support post body on a side of the first substrate facing the second substrate; and forming the auxiliary pad on a side of the second substrate facing the first substrate; wherein when assembling, the auxiliary pad corresponds to the support post body. ### Claim 17 (depends on 15) The manufacturing method of the liquid crystal display panel as claimed in claim 15, wherein forming the auxiliary pad and the support post pad comprises: forming the auxiliary pad on a side of the first substrate facing the second substrate; and forming the support post body on a side of the support post body away from the first substrate. ### Claim 18 (depends on 15) The manufacturing method of the liquid crystal display panel as claimed in claim 15, wherein forming the auxiliary pad and the support post pad comprises: forming the support post body on a side of the first substrate facing the second substrate; and forming the auxiliary pad on a side of the support post body away from the first substrate. ### Claim 19 (depends on 15) The manufacturing method of the liquid crystal display panel as claimed in claim 15, wherein a forming process of the auxiliary pad and the support post body comprises exposure and development, inkjet printing, or coating method. ### Claim 20 (depends on 14) The manufacturing method of the liquid crystal display panel as claimed in claim 14, wherein changing of the auxiliary pad from the non-expanded state to the expanded state comprises: irradiating a compressed region of the liquid crystal display panel with light equivalent to nine sunlight intensities for 100 to 180 minutes.