# US 11,906,836 B2 · Liquid crystal display device and temperature control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,836 B2 - Document ID: US11906836B2 - Status: Granted - Kind: B2 - Application number: 17/870,505 - Filed: 2022-07-21 - Published: 2024-01-04 - Granted: 2024-02-20 - Earliest claimed: 2022-07-01 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: Tcl China Star Optoelectronics Technology Co., Ltd. - Inventors: Aili Cheng; Yanfang Yin - Web page: https://patentgrep.com/patent/US11906836B2 ## CPC - G02F 1/133382: {Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell} - H05B 3/34: flexible, e.g. heating nets or webs - H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields - G02F 1/133514: {Colour filters} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G02F 2202/16: conductive - H05B 2203/013: Heaters using resistive films or coatings - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A liquid crystal display device and a temperature control method thereof are provided by the present application; the liquid crystal display device includes a liquid crystal display module and a control module, the control module is connected to the liquid crystal display module; the control module includes a temperature detection unit, a temperature adjustment unit, and a control unit. A temperature a part of the liquid crystal display module located in a display area and a temperature of a part of the liquid crystal display module located in the non-display area can be independently controlled in the present application, so that these two areas can quickly reach a target temperature threshold according to their own temperatures, so as to prevent a temperature of entire the liquid crystal display module from being too high or too low. ## Claims ### Claim 1 A liquid crystal display device, having a display area and a non-display area, wherein the liquid crystal display device comprises: a liquid crystal display module; a control module connected to the liquid crystal display module; an array substrate connected to the control module; a color filter substrate disposed opposite to the array substrate; a liquid crystal layer disposed between the array substrate and the color filter substrate; wherein the control module comprises: a temperature detection unit, the temperature detection unit comprising a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is configured for detecting a temperature of a part of the liquid crystal display module located in the display area, and the temperature of the part of the liquid crystal display module located in the display area is a first temperature; the second temperature sensor is configured for detecting a temperature of a part of the liquid crystal display module located in the non-display area, and the temperature of the part of the liquid crystal display module located in the non-display area is a second temperature; a temperature adjustment unit configured for adjusting the first temperature and the second temperature, the temperature adjustment unit comprising a heat generating layer disposed on a side surface of the array substrate away from the color filter substrate and connected to the array substrate, wherein in a case that the first temperature is lower than a target temperature threshold, the part of the liquid crystal display module located in the display area is heated until the first temperature reaches the target temperature threshold; in a case that the second temperature is lower than the target temperature threshold, the part of the liquid crystal display module located in the non-display area is heated until the second temperature reaches the target temperature threshold; and a control unit connected to the temperature detection unit and the temperature adjustment unit, and configured for acquiring the first temperature and the second temperature respectively and controlling the temperature adjustment unit; and wherein the liquid crystal display device further comprises: a first index margin erasing layer disposed between the array substrate and the heat generating layer; and a second index margin erasing layer disposed on a side surface of the heat generating layer away from the color filter substrate; and the first index margin erasing layer and the second index margin erasing layer are configured to make the heat generating layer more transparent such that a reflectivity of the entire display area is completely consistent with a reflectivity of the heat generating layer. ### Claim 2 (depends on 1) The liquid crystal display device according to claim 1, wherein the heat generating layer comprises: a first heat generating structure corresponding to a part of the array substrate located in the display area, the first temperature sensor being configured for detecting a temperature of the first heat generating structure; and a second heat generating structure corresponding to a part of the array substrate located in the non-display area, and the second temperature sensor being configured for detecting a temperature of the second heat generating structure. ### Claim 3 (depends on 2) The liquid crystal display device according to claim 2, wherein the temperature adjustment unit comprises a first temperature adjustment unit and a second temperature adjustment unit; the first temperature adjustment unit is connected to the first heat generating structure and is configured for adjusting the temperature of the first heat generating structure; and the second temperature adjustment unit is connected to the second heat generating structure and is configured for adjusting the temperature of the second heat generating structure. ### Claim 4 (depends on 2) The liquid crystal display device according to claim 2, wherein the array substrate is provided with a flexible circuit board, and the flexible circuit board is located in the non-display area; the first heat generating structure and the second heat generating structure are respectively connected to the flexible circuit board through silver paste wirings; and a material of the first heat generating structure and a material of the second heat generating structure are indium tin oxide. ### Claim 5 (depends on 1) The liquid crystal display device according to claim 1, wherein a range of the target temperature threshold is a range of a liquid crystal inversion temperature of the liquid crystal display module. ### Claim 6 A temperature control method for a liquid crystal display device, the liquid crystal display device having a display area and a non-display area, and the liquid crystal display device comprising a liquid crystal display module; a control module connected to the liquid crystal display module and comprising a temperature detection unit, a temperature adjustment unit and a control unit; an array substrate connected to the control module; a color filter substrate disposed opposite to the array substrate; a liquid crystal layer disposed between the array substrate and the color filter substrate; a first index margin erasing layer disposed between the array substrate and a heat generating layer; and a second index margin erasing layer disposed on a side surface of the heat generating layer away from the color filter substrate; and the first index margin erasing layer and the second index margin erasing layer being configured to make the heat generating layer more transparent such that a reflectivity of the entire display area is completely consistent with a reflectivity of the heat generating layer; wherein the temperature control method for the liquid crystal display device comprises following steps: S1, detecting a temperature of a part of the liquid crystal display module located in the display area, the temperature of the part of the liquid crystal display module located in the display area being a first temperature; and detecting a temperature of a part of the liquid crystal display module located in the non-display area, the temperature of the part of the liquid crystal display module located in the non-display area being a second temperature; S2, determining whether the first temperature and the second temperature are lower than a target temperature threshold, respectively; S3, heating the part of the liquid crystal display module located in the display area in a case that the first temperature is lower than the target temperature threshold; and heating the part of the liquid crystal display module located in the non-display area in a case that the second temperature is lower than the target temperature threshold; and S4, stopping heating the part of the liquid crystal display module located in the display area when the first temperature reaches the target temperature threshold; stopping heating the part of the liquid crystal display module located in the non-display area in a case that the second temperature reaches the target temperature threshold; and simultaneously waiting to enter a next sampling period, that is, returning to the step S1. ### Claim 7 (depends on 6) The temperature control method for the liquid crystal display device according to claim 6, wherein in the step S3, an instruction is sent to the part of the liquid crystal display module located in the display area in the case that the first temperature is lower than the target temperature threshold, so that the part of the liquid crystal display module located in the display area is heated; and an instruction is sent to the part of the liquid crystal display module located in the non-display area in the case that the second temperature is lower than the target temperature threshold, so that the liquid crystal display module located in the non-display area is heated.