# US 2014/0192401 A1 · Optical controller containing dispensable electrophoretic fluid and method of dispersing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192401 A1 - Document ID: US20140192401A1 - Status: Published application - Kind: A1 - Application number: 13/860,344 - Filed: 2013-04-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Hyunjin AN - Web page: https://patentgrep.com/patent/US20140192401A1 ## CPC - G02F 1/167: by electrophoresis - G02F 1/1676: Electrodes - G02F 1/1679: Gaskets; Spacers; Sealing of cells; Filling or closing of cells - G02F 1/13415: {Drop filling process} - G02F 1/16756: Insulating layers - G02F 1/1681: having two or more microcells partitioned by walls, e.g. of microcup type - 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 controller includes: a transparent lower substrate with a first electrode pattern; a transparent upper substrate with a transparent electrode; a plurality of divided regions separated by partitions on the transparent lower substrate; a medium containing charged particles at less than 5 wt % is in the plurality of divided regions and between the first electrode pattern and the transparent electrode; and a seal surrounding the plurality of divided regions and bonded to the first and second substrates. ## Claims ### Claim 1 An optical controller, comprising: a transparent lower substrate with a first electrode pattern; a transparent upper substrate with a transparent electrode; a plurality of divided regions separated by partitions on the transparent lower substrate; a medium containing charged particles at less than 5 wt % within the plurality of divided regions and between the first electrode pattern and the transparent electrode; and a seal surrounding the plurality of divided regions and bonded to the transparent lower substrate and the transparent upper substrates. ### Claim 2 (depends on 1) The optical controller according to claim 1, further comprising a first insulating layer on the first electrode pattern and a second insulating layer on the transparent electrode. ### Claim 3 (depends on 1) The optical controller according to claim 1, wherein the medium has a viscosity of less than 50 cp. ### Claim 4 (depends on 1) The optical controller according to claim 1, wherein the partitions of the plurality of divided regions are in one of a column, row and matrix configuration. ### Claim 5 (depends on 1) The optical controller according to claim 1, wherein the partitions of the divided regions are attached to the transparent lower substrate and extend toward the upper substrate to prevent shifting of the medium between the divided regions. ### Claim 6 (depends on 1) The optical controller of claim 1, wherein a distance between opposing partitions of a divided region is more than 200 micrometers. ### Claim 7 (depends on 1) The optical controller according to claim 1, further comprising a polymer pattern between the transparent lower substrate and the first electrode pattern. ### Claim 8 (depends on 7) The optical controller according to claim 7, wherein the polymer and the first electrode pattern have an uneven surface. ### Claim 9 (depends on 7) The optical controller according to claim 7, wherein the first electrode pattern correspond to the polymer pattern. ### Claim 10 (depends on 1) The optical controller according to claim 1, further comprising a first insulating layer on the first electrode pattern. ### Claim 11 (depends on 10) The optical controller according to claim 10, further comprising a second insulating layer on the transparent electrode. ### Claim 12 An optical controller, comprising: a lower substrate with a first electrode pattern; an upper substrate with a second electrode pattern; a plurality of divided regions separated by partitions on the lower substrate; and a medium positioned within the seal structure and between the first electrode pattern and the second electrode pattern, the medium having a vapor pressure of less than 40 Pa and containing charged particles of substantially a first polarity. ### Claim 13 (depends on 12) The optical controller according to claim 12, further comprising a first insulating layer on the first electrode pattern and a second insulating layer on the second electrode pattern. ### Claim 14 (depends on 12) The optical controller according to claim 12, wherein the medium contains charged particles at less than 5 wt %. ### Claim 15 (depends on 12) The optical controller according to claim 12, further comprising a seal surrounding the plurality of divided regions. ### Claim 16 (depends on 15) The optical controller according to claim 15, wherein the seal is cured using ultraviolet light. ### Claim 17 (depends on 12) The optical controller according to claim 12, wherein the partitions of the plurality of divided regions are in one of a column, row and matrix configuration. ### Claim 18 (depends on 12) The optical controller according to claim 12, wherein the partitions of the divided regions are attached to the transparent lower substrate and extend toward the upper substrate to prevent shifting of the medium between the divided regions. ### Claim 19 (depends on 12) The optical controller of claim 12, wherein a longest distance between adjacent partitions of a divided region is more than 200 micrometers. ### Claim 20 (depends on 12) The optical controller according to claim 12 further comprising a polymer pattern between the transparent lower substrate and the first electrode pattern. ### Claim 21 (depends on 20) The optical controller according to claim 20, wherein the polymer and the first electrode pattern have an uneven surface. ### Claim 22 (depends on 20) The optical controller according to claim 20, wherein the first electrode pattern correspond to the polymer pattern. ### Claim 23 (depends on 12) The optical controller according to claim 12, further comprising a first insulating layer formed on the first electrode pattern. ### Claim 24 (depends on 23) The optical controller according to claim 23, further comprising a second insulating layer is formed on the second electrode pattern. ### Claim 25 A method of making an optical controller, comprising: forming a first electrode on a first substrate; forming a plurality of divided regions separated by partitions on the first substrate; dispensing an electrophoretic fluid on the first substrate in which the fluid contains charged particles at less than 5 wt %; forming a second electrode on a second substrate; positioning the second substrate on the first substrate in a chamber; and evacuating the chamber so that the first and second substrates are bonded to each other. ### Claim 26 (depends on 25) The method of making an optical controller according to claim 25, further comprising forming a seal structure on the second substrate prior to the positioning the second substrate. ### Claim 27 (depends on 25) The method of making an optical controller according to claim 25, further comprising curing the seal at atmospheric pressure after evacuating the chamber. ### Claim 28 (depends on 25) The method of making an optical controller according to claim 25, wherein a distance between opposing partitions of a divided region is more than 200 micrometers. ### Claim 29 (depends on 25) The method of making an optical controller according to claim 25, wherein the partitions of the plurality of divided regions are in one of a column, row and matrix configuration.