# US 10,504,415 B2 · GOA circuit and driving method for foldable display panel, and foldable display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,504,415 B2 - Document ID: US10504415B2 - Status: Granted - Kind: B2 - Application number: 16/007,790 - Filed: 2018-06-13 - Published: 2019-07-25 - Granted: 2019-12-10 - Earliest claimed: 2018-01-19 - Assignees: Wuhan China Star Optoelectornics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Mian Zeng - Web page: https://patentgrep.com/patent/US10504415B2 ## CPC - G09G 3/035: {for flexible display surfaces} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3677: {suitable for active matrices only} - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2310/0221: with use of split matrices (G09G3/3644 and G09G3/3666 take precedence) - G09G 2310/0232: Special driving of display border areas - G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/062: Waveforms for resetting a plurality of scan lines at a time - H10D 86/411: {characterised by materials, geometry or structure of the substrates} - H10D 86/60: wherein the TFTs are in active matrices - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract The invention provides a GOA circuit and driving method for foldable display panel and a foldable display panel. The GOA circuit comprises a plurality of cascaded GOA units and a switch module, the GOA units in folding area comprising a reset module; the reset module being for controlling GOA units in folding area to shut down pixels; the switch module having two ends connected respectively to last cascaded GOA unit in first active area and first cascaded GOA unit in second active area, for connecting an output end of the last cascaded GOA unit in the first active area to an input end of the first cascaded GOA unit in the second active area during folding, by using the last cascaded GOA unit in the first active area to output a gate control signal to control activation of the first cascaded GOA unit in the second active area. ## Claims ### Claim 1 A gate driver on array (GOA) circuit for foldable display panel, the foldable display panel having a first active area, a second active area, and a folding area located between the first active area and the second active area, the GOA circuit comprising a plurality of cascaded GOA units and a switch module, and the GOA units in the folding area comprising a reset module; the reset module being for controlling the GOA units in the folding area to shut down pixels in the folding area during folding the foldable display panel; the switch module having two ends connected respectively to a last cascaded GOA unit in the first active area and a first cascaded GOA unit in the second active area, for connecting an output end of the last cascaded GOA unit in the first active area to an input end of the first cascaded GOA unit in the second active area during folding the foldable display panel, by using the last cascaded GOA unit in the first active area to output a gate control signal to control activation of the first cascaded GOA unit in the second active area; wherein before folding the foldable display panel, the GOA units are enumerated in an increasing order from the first active area to the second active area. ### Claim 2 (depends on 1) The GOA circuit for foldable display panel as claimed in claim 1, wherein the plurality of cascaded GOA units are divided into two groups of GOA units, with each group of GOA units comprising a plurality of cascaded GOA units; wherein the two groups of GOA units are disposed respectively at two opposite sides of the foldable display panel, and in each group of GOA units, the last cascaded GOA unit in the first active area is connected through one switch module to the first cascaded GOA unit in the second active area. ### Claim 3 (depends on 1) The GOA circuit for foldable display panel as claimed in claim 1, wherein the reset module pulls down the voltage of gate driving signal outputted by the GOA units on the folding area to shut down the pixels in the folding area during folding the foldable display panel. ### Claim 4 (depends on 1) The GOA circuit for foldable display panel as claimed in claim 1, wherein the reset module of the GOA units in the folding area is connected to receive an enable signal, and the enable signal is at high voltage during folding the foldable display panel to control the reset module to turn on to enable the reset module to control the GOA units in the folding area to shut down all pixels in the folding area. ### Claim 5 (depends on 1) The GOA circuit for foldable display panel as claimed in claim 1, wherein the switch module is a thin film transistor (TFT), with a gate receiving the enable signal, and a source and a drain connected respectively to the output end of the last cascaded GOA unit in the first active area and the input end of the first cascaded GOA unit in the second active area. ### Claim 6 (depends on 1) The GOA circuit for foldable display panel as claimed in claim 1, wherein the reset module receives the enable signal, and the enable signal is at low voltage to shut down the reset module when the foldable display panel is not folded; the switch module is also for cutting off the connection between the output end of the last cascaded GOA unit in the first active area and the input end of the first cascaded GOA unit in the second active area when the foldable display panel is not folded. ### Claim 7 A foldable display panel, comprising: a first active area, a second active area, and a folding area located between the first active area and the second active area, the foldable display panel further comprising a GOA circuit; the GOA circuit comprising a plurality of cascaded GOA units and a switch module, and the GOA units in the folding area comprising a reset module; the reset module being for controlling the GOA units in the folding area to shut down pixels in the folding area during folding the foldable display panel; the switch module having two ends connected respectively to a last cascaded GOA unit in the first active area and a first cascaded GOA unit in the second active area, for connecting an output end of the last cascaded GOA unit in the first active area to an input end of the first cascaded GOA unit in the second active area during folding the foldable display panel, by using the last cascaded GOA unit in the first active area to output a gate control signal to control activation of the first cascaded GOA unit in the second active area; wherein before folding the foldable display panel, the GOA units are enumerated in an increasing order from the first active area to the second active area. ### Claim 8 (depends on 7) The foldable display panel as claimed in claim 7, wherein the plurality of cascaded GOA units are divided into two groups of GOA units, with each group of GOA units comprising a plurality of cascaded GOA units; wherein the two groups of GOA units are disposed respectively at two opposite sides of the foldable display panel, and in each group of GOA units, the last cascaded GOA unit in the first active area is connected through one switch module to the first cascaded GOA unit in the second active area. ### Claim 9 (depends on 7) The foldable display panel as claimed in claim 7, wherein the reset module pulls down the voltage of gate driving signal outputted by the GOA units on the folding area to shut down the pixels in the folding area during folding the foldable display panel. ### Claim 10 (depends on 7) The foldable display panel as claimed in claim 7, wherein the reset module of the GOA units in the folding area is connected to receive an enable signal, and the enable signal is at high voltage during folding the foldable display panel to control the reset module to turn on to enable the reset module to control the GOA units in the folding area to shut down all pixels in the folding area. ### Claim 11 (depends on 7) The foldable display panel as claimed in claim 7, wherein the switch module is a thin film transistor (TFT), with a gate receiving the enable signal, and a source and a drain connected respectively to the output end of the last cascaded GOA unit in the first active area and the input end of the first cascaded GOA unit in the second active area. ### Claim 12 (depends on 7) The foldable display panel as claimed in claim 7, wherein the reset module receives the enable signal, and the enable signal is at low voltage to shut down the reset module when the foldable display panel is not folded; the switch module is also for cutting off the connection between the output end of the last cascaded GOA unit in the first active area and the input end of the first cascaded GOA unit in the second active area when the foldable display panel is not folded. ### Claim 13 A driving method for foldable display panel, comprising the steps of: shutting down pixels in folding area of foldable display panel during folding the foldable display panel; a last cascaded GOA unit in a first active area of the foldable display panel outputting a gate driving signal to a first GOA unit in a second active area of the foldable display panel to control activation of the first cascaded GOA unit of the second active area. ### Claim 14 (depends on 13) The driving method for foldable display panel as claimed in claim 13, wherein the step of shutting down the pixels in the folding area of foldable display panel specifically comprises: pulling down voltage of the gate driving signal outputted by the GOA units in the folding area to low voltage to shut down the pixels in the folding area. ### Claim 15 (depends on 13) The driving method for foldable display panel as claimed in claim 13, wherein the driving method further comprises the following steps: before folding the foldable display panel, turning on the pixels in the folding area; the last cascaded GOA unit in the first active area outputting the gate driving signal to a first GOA unit in the folding area, a last cascaded GOA unit in the folding area outputting the gate driving signal to the first GOA unit in the second active area.