# US 12,118,920 B2 · Display panel and driving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,920 B2 - Document ID: US12118920B2 - Status: Granted - Kind: B2 - Application number: 17/295,149 - Filed: 2021-04-30 - Published: 2024-04-18 - Granted: 2024-10-15 - Earliest claimed: 2021-04-16 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Wenfang Li - Web page: https://patentgrep.com/patent/US12118920B2 ## CPC - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2320/029: by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel - G09G 2320/041: Temperature compensation - G09G 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - 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) ## Abstract A display panel and a driving method thereof are provided. The display panel includes a power supply module, a driving module, a current detection module, and a control module. The current detection module detects a driving current of the driving module and outputs a first detection signal when a driving current is greater than a threshold current. The control module receives the first detection signal, regulates and outputs a first data voltage equal to a driving voltage according to the first detection signal, and transmits the first data voltage into the driving module. ## Claims ### Claim 1 A display panel, comprising: a power supply module; a driving module electrically connected to the power supply module, wherein the power supply module provides a driving voltage to the driving module; a current detection module electrically connected to the driving module, wherein the current detection module is configured to detect a driving current of the driving module and to output a first detection signal when the driving current is greater than a threshold current; and a control module electrically connected to the current detection module and the driving module, wherein the control module is configured to receive the first detection signal, to regulate and output a first data voltage equal to the driving voltage according to the first detection signal, and to transmit the first data voltage into the driving module, wherein the current detection module comprises: a detection resistor electrically connected to the driving module; and a current detection integrated circuit electrically connected to the detection resistor, wherein the current detection integrated circuit is configured to calculate a detection current according to a detection voltage between two sides of the detection resistor, to compare the detection current to the threshold current, to output the first detection signal when the detection current is greater than the threshold current, and to output a second detection signal when the detection current is less than or equal to the threshold current, wherein the control module comprises: a field programmable gate array (FPGA) control circuit electrically connected to the current detection integrated circuit; a voltage raising circuit electrically connected to the FPGA control circuit; and an electric level conversion integrated circuit electrically connected to the voltage raising circuit, and wherein the FPGA control circuit is configured to receive the first detection signal or the second detection signal and to control the voltage raising circuit to output a first voltage or a second voltage, the electric level conversion integrated circuit correspondingly converts the first voltage or the second voltage into the first data voltage or a second data voltage and transmits the first data voltage or the second data voltage into the driving module. ### Claim 2 (depends on 1) The display panel as claimed in claim 1, wherein when the driving current is less than or equal to the threshold current, the current detection module outputs a second detection signal, and the control module is further configured to receive the second detection signal and to regulate and to output a second data voltage equal to the driving voltage according to the second detection signal. ### Claim 3 (depends on 2) The display panel as claimed in claim 2, wherein the second detection signal is high electric level, and the first detection signal is low electric level. ### Claim 4 (depends on 1) The display panel as claimed in claim 1, wherein the first voltage is less than the second voltage. ### Claim 5 (depends on 1) The display panel as claimed in claim 1, wherein the FPGA control circuit regulates the voltage raising circuit and makes the voltage raising circuit output the first voltage or the second voltage by serial data lines and serial clock lines. ### Claim 6 (depends on 2) The display panel as claimed in claim 2, wherein the current detection module comprises: a detection resistor electrically connected to the driving module; and a current detection integrated circuit electrically connected to the detection resistor, wherein the current detection integrated circuit is configured to calculate a detection current according to a detection voltage between two sides of the detection resistor, to compare the detection current to the threshold voltage, to output the first detection signal when the detection current is greater than the threshold current, and to output the second detection signal when the detection current is less than or equal to the threshold current. ### Claim 7 (depends on 3) The display panel as claimed in claim 3, wherein the current detection module comprises: a detection resistor electrically connected to the driving module; and a current detection integrated circuit electrically connected to the detection resistor, wherein the current detection integrated circuit is configured to calculate a detection current according to a detection voltage between two sides of the detection resistor, to compare the detection current to the threshold current, to output the first detection signal when the detection current is greater than the threshold current, and to output the second detection signal when the detection current is less than or equal to the threshold current. ### Claim 8 (depends on 1) The display panel as claimed in claim 1, wherein the display panel further comprises: a light emitting module electrically connected to the driving module and emitting light under drive of the driving module. ### Claim 9 A driving method of a display panel, wherein the display panel comprises a power supply module, a driving module, a light emitting module, a current detection module, and a control module, and the driving method of the display panel comprises: providing a driving voltage to the driving module by the power supply module; driving the light emitting module to emit light by the driving module; detecting a driving current of the driving module and outputting a first detection signal by the current detection module when the driving current is greater than a threshold current; and receiving the first detection signal, regulating and outputting a first data voltage equal to the driving voltage according to the first detection signal, and inputting the first data voltage into the driving module by the control module, wherein in the step of detecting the driving current of the driving module and outputting the first detection signal by the current detection module when the driving current is greater than the threshold current, when the driving current is less than or equal to the threshold current, the current detection module outputs a second detection signal, the second detection signal is high electric level, and the first detection signal is low electric level; and in the step off receiving the first detection signal, regulating and outputting the first data voltage equal to the driving voltage according to the first detection signal, and outputting the first data voltage into the driving module by the control module, the control module further receives the second detection signal, regulates and outputs a second data voltage equal to the driving voltage according to the second detection signal, and inputs the second data voltage into the driving module, wherein the control module comprises a field programmable gate array (FPGA) control circuit, a voltage raising circuit, and an electric level conversion integrated circuit, and the step of receiving the first detection signal, regulating and outputting the first data voltage equal to the driving voltage according to the first detection signal, and outputting the first data voltage into the driving module by the control module comprises: the FPGA control circuit receives the first detection signal or the second detection signal and controls the voltage raising circuit to output a first voltage or a second voltage; the voltage raising circuit outputs the first voltage or the second voltage; and the electric level conversion integrated circuit correspondingly converts the first voltage or the second voltage into the first data voltage or the second data voltage. ### Claim 10 (depends on 9) The driving method of the display panel as claimed in claim 9, wherein the first voltage is less than the second voltage. ### Claim 11 (depends on 9) The driving method of the display panel as claimed in claim 9, wherein the FPGA control circuit regulates the voltage raising circuit and makes the voltage raising circuit output the first voltage or the second voltage by serial data lines and serial clock lines. ### Claim 12 (depends on 9) The driving method of the display panel as claimed in claim 9, wherein the display panel further comprises: a light emitting module electrically connected to the driving module and emits light under drive of the driving module. ### Claim 13 (depends on 9) The driving method of the display panel as claimed in claim 9, wherein the current detection module comprises: a detection resistor electrically connected to the driving module; and a current detection integrated circuit electrically connected to the detection resistor, wherein the current detection integrated circuit is configured to calculate a detection current according to a detection voltage between two sides of the detection resistor, to compare the detection current to the threshold current, to output the first detection signal when the detection current is greater than the threshold current, and to output a second detection signal when the detection current is less than or equal to the threshold current. ### Claim 14 (depends on 13) The driving method of the display panel as claimed in claim 13, wherein the current detection module further comprises a storage unit, and the storage unit stores the threshold current in advance. ### Claim 15 (depends on 9) The driving method of the display panel as claimed in claim 9, wherein the driving module comprises a driving circuit. ### Claim 16 (depends on 15) The driving method of the display panel as claimed in claim 15, wherein the driving circuit comprises at least one scanning line, at least one data line, a plurality of light emitting diode (LED) lights, a first transistor, a second transistor, and a storage capacitor; an end of the first transistor is grounded, another end of the first transistor is electrically connected to an end of the LED lights, and another end of the LED lights is connected to the power supply module; a gate electrode of the second transistor is electrically connected to the scanning line, a source electrode of the second transistor is electrically connected to the data line, a drain electrode of the second transistor is electrically connected to a gate electrode of the first transistor; an end of the storage capacitor is grounded, and another end of the storage capacitor is respectively electrically connected to the gate electrode of the first transistor and the drain electrode of the second transistor.