# US 12,112,680 B1 · Power-on method of display panel and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,680 B1 - Document ID: US12112680B1 - Status: Granted - Kind: B1 - Application number: 18/447,632 - Filed: 2023-08-10 - Published: 2024-09-26 - Granted: 2024-10-08 - Earliest claimed: 2023-03-21 - Assignees: Hkc Corporation Limited - Applicants: Hkc Corporation Limited - Inventors: Mancheng Zhou; Yuanping Zhang; Rongrong Li - Web page: https://patentgrep.com/patent/US12112680B1 ## CPC - G09G 3/2074: {using sub-pixels} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/026: Arrangements or methods related to booting a display - 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 includes a plurality of sub-pixels, where each sub-pixel is correspondingly provided with a drive circuit. The drive circuit includes a light emitting assembly and a storage capacitor. The power-on method of the display panel includes: acquiring a power-on signal, and generating a first initialization instruction, a second initialization instruction and a display instruction according to the power-on signal; initializing the storage capacitor according to the first initialization instruction; initializing the light emitting assembly according to the second initialization instruction after initializing the storage capacitor, and at least providing preset gray-scale voltages for the light emitting assembly, so as to perform a preheating startup on the light emitting assembly; and controlling the light emitting assembly to display normally according to the display instruction after initializing the light emitting assembly. ## Claims ### Claim 1 A power-on method of a display panel, the display panel comprising a plurality of sub-pixels, each sub-pixel being correspondingly provided with a drive circuit, and the drive circuit comprising a light emitting assembly and a storage capacitor, wherein the power-on method of the display panel comprises: acquiring a power-on signal, and generating a first initialization instruction, a second initialization instruction and a display instruction according to the power-on signal; initializing the storage capacitor according to the first initialization instruction; initializing the light emitting assembly according to the second initialization instruction after initializing the storage capacitor, and at least providing preset gray-scale voltages for the light emitting assembly, so as to perform a preheating startup on the light emitting assembly; and controlling the light emitting assembly to display normally according to the display instruction after initializing the light emitting assembly. ### Claim 2 (depends on 1) The power-on method of the display panel according to claim 1, wherein a plurality of preset gray-scale voltages are provided; and the step of providing the preset gray-scale voltages for the light emitting assembly comprises: determining a providing sequence of the plurality of preset gray-scale voltages, and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence. ### Claim 3 (depends on 2) The power-on method of the display panel according to claim 2, wherein the step of determining the providing sequence of the plurality of preset gray-scale voltages, and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence comprises: determining that the providing sequence of the plurality of preset gray-scale voltages is a sequence of voltages from low to high; and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the sequence from low to high. ### Claim 4 (depends on 2) The power-on method of the display panel according to claim 2, wherein the plurality of preset gray-scale voltages comprise a first gray-scale voltage, a second gray-scale voltage and a third gray-scale voltage which are increased in sequence, the first gray-scale voltage corresponding to a first gray-scale brightness, the second gray-scale voltage corresponding to a second gray-scale brightness, the third gray-scale voltage corresponding to a third gray-scale brightness, and a difference between the first gray-scale brightness and the second gray-scale brightness and a difference between the second gray-scale brightness and the third gray-scale brightness being both less than or equal to a 6-gray-scale brightness; and the step of providing the preset gray-scale voltages for the light emitting assembly comprises: providing the first gray-scale voltage, the second gray-scale voltage and the third gray-scale voltage for the light emitting assembly in sequence. ### Claim 5 (depends on 2) The power-on method of the display panel according to claim 2, wherein the step of providing the preset gray-scale voltages for the light emitting assembly further comprises: determining a power-on startup time of the display panel, determining a number of cycles of the plurality of preset gray-scale voltages according to the power-on startup time, and in each cycle, providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence. ### Claim 6 (depends on 1) The power-on method of the display panel according claim 1, wherein a gray-scale brightness corresponding to the preset gray-scale voltage is less than or equal to a 6-gray-scale brightness. ### Claim 7 (depends on 1) The power-on method of the display panel according to claim 1, wherein the step of initializing the storage capacitor according to the first initialization instruction comprises: providing a low gray-scale voltage representing a black gray scale and a high gray-scale voltage representing a white gray scale for the storage capacitor in a time-sharing manner. ### Claim 8 (depends on 1) The power-on method of the display panel according to claim 1, wherein the drive circuit further comprises a drive transistor, a first response switch, a second response switch, a third response switch, a fourth response switch, a fifth response switch, and a sixth response switch, a first end of the first response switch being connected with a second end of the drive transistor, a second end of the first response switch being connected with an anode of the light emitting assembly, a control end of the drive transistor being connected with a first end of the storage capacitor, and a second end of the storage capacitor being configured to be connected with a power supply voltage end; wherein a first end of the second response switch is configured to be connected with a first reset voltage end, and a second end of the second response switch is connected with a line between the storage capacitor and the drive transistor; a first end of the third response switch is connected with a line between the second response switch and the storage capacitor, and a second end of the third response switch is connected with a line between the first response switch and the drive transistor; a first end of the fourth response switch is configured to be connected with a power supply voltage end, and a second end of the fourth response switch is connected with a first end of the drive transistor; a first end of the fifth response switch is configured to be connected with a data voltage end, and a second end of the fifth response switch is connected with a line between the fourth response switch and the drive transistor; a first end of the sixth response switch is connected with a second reset voltage end, and a second end of the sixth response switch is connected with a line between the light emitting assembly and the first response switch; wherein the drive circuit further includes a first scanning line, a second scanning line, and a display signal line, a control end of the third response switch, a control end of the fifth response switch and a control end of the sixth response switch being connected with the first scanning line; a control end of the second response switch being connected with the second scanning line; a control end of the first response switch and a control end of the fourth response switch being connected with the display signal line; the first scanning line being configured to provide a first scanning signal, the second scanning line is configured to provide a second scanning signal, and the display signal line being configured to provide a display signal; and the step of initializing the storage capacitor according to the first initialization instruction comprises: turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning on the second response switch in response to the second scanning signal, and providing a voltage of a first low-voltage reset end for the storage capacitor, so as to perform a voltage reset on the storage capacitor; after performing the voltage reset on the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning on the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, turning off the second response switch in response to the second scanning signal, and providing a low gray-scale voltage representing a black gray scale for the storage capacitor, and providing a high gray-scale voltage representing a white gray scale for the storage capacitor, so as to charge the storage capacitor; and after charging the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning off the second response switch in response to the second scanning signal, so as to perform a voltage initialization on the storage capacitor. ### Claim 9 (depends on 8) The power-on method of the display panel according to claim 8, wherein the step of initializing the light emitting assembly according to the second initialization instruction comprises: turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning on the second response switch in response to the second scanning signal, and providing a voltage of the first low-voltage reset end for the storage capacitor, so as to perform a voltage reset on the storage capacitor; after performing the voltage reset on the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning on the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, turning off the second response switch in response to the second scanning signal, and providing a preset gray-scale voltage for the storage capacitor, so as to charge the storage capacitor; and after charging the storage capacitor, turning on the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning off the second response switch in response to the second scanning signal, and providing the preset gray-scale voltage stored by the storage capacitor for the light emitting assembly, so as to perform a preheating startup on the light emitting assembly. ### Claim 10 A display panel, wherein the display panel is powered on by using a power-on method, wherein the display panel comprises a plurality of sub-pixels, each sub-pixel being correspondingly provided with a drive circuit, and the drive circuit comprising a light emitting assembly and a storage capacitor, wherein the power-on method of the display panel comprises: acquiring a power-on signal, and generating a first initialization instruction, a second initialization instruction and a display instruction according to the power-on signal; initializing the storage capacitor according to the first initialization instruction; initializing the light emitting assembly according to the second initialization instruction after initializing the storage capacitor, and at least providing preset gray-scale voltages for the light emitting assembly, so as to perform a preheating startup on the light emitting assembly; and controlling the light emitting assembly to display normally according to the display instruction after initializing the light emitting assembly. ### Claim 11 (depends on 10) The display panel according to claim 10, wherein a plurality of preset gray-scale voltages are provided; and the step of providing the preset gray-scale voltages for the light emitting assembly comprises: determining a providing sequence of the plurality of preset gray-scale voltages, and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence. ### Claim 12 (depends on 11) The display panel according to claim 11, wherein the step of determining the providing sequence of the plurality of preset gray-scale voltages, and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence comprises: determining that the providing sequence of the plurality of preset gray-scale voltages is a sequence of voltages from low to high; and providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the sequence from low to high. ### Claim 13 (depends on 11) The display panel according to claim 11, wherein the plurality of preset gray-scale voltages comprise a first gray-scale voltage, a second gray-scale voltage and a third gray-scale voltage which are increased in sequence, the first gray-scale voltage corresponding to a first gray-scale brightness, the second gray-scale voltage corresponding to a second gray-scale brightness, the third gray-scale voltage corresponding to a third gray-scale brightness, and a difference between the first gray-scale brightness and the second gray-scale brightness and a difference between the second gray-scale brightness and the third gray-scale brightness being both less than or equal to a 6-gray-scale brightness; and the step of providing the preset gray-scale voltages for the light emitting assembly comprises: providing the first gray-scale voltage, the second gray-scale voltage and the third gray-scale voltage for the light emitting assembly in sequence. ### Claim 14 (depends on 11) The display panel according to claim 11, wherein the step of providing the preset gray-scale voltages for the light emitting assembly further comprises: determining a power-on startup time of the display panel, determining a number of cycles of the plurality of preset gray-scale voltages according to the power-on startup time, and in each cycle, providing the plurality of preset gray-scale voltages for the light emitting assembly in sequence according to the providing sequence. ### Claim 15 (depends on 10) The display panel according to claim 10, wherein a gray-scale brightness corresponding to the preset gray-scale voltage is less than or equal to a 6-gray-scale brightness. ### Claim 16 (depends on 10) The display panel according to claim 10, wherein the step of initializing the storage capacitor according to the first initialization instruction comprises: providing a low gray-scale voltage representing a black gray scale and a high gray-scale voltage representing a white gray scale for the storage capacitor in a time-sharing manner. ### Claim 17 (depends on 10) The display panel according to claim 10, wherein the drive circuit further comprises a drive transistor, a first response switch, a second response switch, a third response switch, a fourth response switch, a fifth response switch, and a sixth response switch, a first end of the first response switch being connected with a second end of the drive transistor, a second end of the first response switch being connected with an anode of the light emitting assembly, a control end of the drive transistor being connected with a first end of the storage capacitor, and a second end of the storage capacitor being configured to be connected with a power supply voltage end; wherein a first end of the second response switch is configured to be connected with a first reset voltage end, and a second end of the second response switch is connected with a line between the storage capacitor and the drive transistor; a first end of the third response switch is connected with a line between the second response switch and the storage capacitor, and a second end of the third response switch is connected with a line between the first response switch and the drive transistor; a first end of the fourth response switch is configured to be connected with a power supply voltage end, and a second end of the fourth response switch is connected with a first end of the drive transistor; a first end of the fifth response switch is configured to be connected with a data voltage end, and a second end of the fifth response switch is connected with a line between the fourth response switch and the drive transistor; a first end of the sixth response switch is connected with a second reset voltage end, and a second end of the sixth response switch is connected with a line between the light emitting assembly and the first response switch; wherein the drive circuit further includes a first scanning line, a second scanning line, and a display signal line, a control end of the third response switch, a control end of the fifth response switch and a control end of the sixth response switch being connected with the first scanning line; a control end of the second response switch being connected with the second scanning line; a control end of the first response switch and a control end of the fourth response switch being connected with the display signal line; the first scanning line being configured to provide a first scanning signal, the second scanning line is configured to provide a second scanning signal, and the display signal line being configured to provide a display signal; and the step of initializing the storage capacitor according to the first initialization instruction comprises: turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning on the second response switch in response to the second scanning signal, and providing a voltage of a first low-voltage reset end for the storage capacitor, so as to perform a voltage reset on the storage capacitor; after performing the voltage reset on the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning on the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, turning off the second response switch in response to the second scanning signal, and providing a low gray-scale voltage representing a black gray scale for the storage capacitor, and providing a high gray-scale voltage representing a white gray scale for the storage capacitor, so as to charge the storage capacitor; and after charging the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning off the second response switch in response to the second scanning signal, so as to perform a voltage initialization on the storage capacitor. ### Claim 18 (depends on 17) The display panel according to claim 17, wherein the step of initializing the light emitting assembly according to the second initialization instruction comprises: turning off the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning on the second response switch in response to the second scanning signal, and providing a voltage of the first low-voltage reset end for the storage capacitor, so as to perform a voltage reset on the storage capacitor; after performing the voltage reset on the storage capacitor, turning off the first response switch and the fourth response switch in response to the display signal, turning on the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, turning off the second response switch in response to the second scanning signal, and providing a preset gray-scale voltage for the storage capacitor, so as to charge the storage capacitor; and after charging the storage capacitor, turning on the first response switch and the fourth response switch in response to the display signal, turning off the third response switch, the fifth response switch and the sixth response switch in response to the first scanning signal, and turning off the second response switch in response to the second scanning signal, and providing the preset gray-scale voltage stored by the storage capacitor for the light emitting assembly, so as to perform a preheating startup on the light emitting assembly.