# US 12,183,255 B2 · Display method and display device of display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,255 B2 - Document ID: US12183255B2 - Status: Granted - Kind: B2 - Application number: 18/307,039 - Filed: 2023-04-26 - Published: 2024-06-27 - Granted: 2024-12-31 - Earliest claimed: 2022-12-22 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: Tcl China Star Optoelectronics Technology Co., Ltd. - Inventors: Haokai Wang - Web page: https://patentgrep.com/patent/US12183255B2 ## CPC - 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 3/20: 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 5/10: Intensity circuits - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/0626: for control of overall brightness - G09G 2330/021: Power management, e.g. power saving - 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 method of a display panel includes determining whether the display panel is in a frequency conversion state, if the display panel is in a frequency conversion state, acquiring a first frequency and a second frequency corresponding to two adjacent frames consecutively for multiple times, determining whether the display panel is in a first display mode according to a difference between the first frequency and the second frequency obtained multiple times, and if the display panel is in the first display mode, turn off a brightness adjustment function of the display panel. ## Claims ### Claim 1 A display method of a display panel, wherein the display panel has a first display mode, a frequency of the display panel in the first display mode gradually changes, and the display method of the display panel comprises: determining whether the display panel is in a frequency conversion state; if the display panel is in the frequency conversion state, acquiring a first frequency and a second frequency corresponding to two adjacent frames consecutively for multiple times; determining whether the display panel is in the first display mode according to a difference between the first frequency and the second frequency obtained multiple times; and if the display panel is in the first display mode, turn off a brightness adjustment function of the display panel; wherein a step of determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times comprises: determining whether an absolute value of the difference between the first frequency and the second frequency acquired each time is less than a setting threshold for frequency mode; if the absolute value of the difference between the first frequency and the second frequency acquired N consecutive times is less than the setting threshold for frequency mode, determining that the display panel is in the first display mode, wherein N is a frame number for display mode determination; wherein the frame number for display mode determination is determined according to a first initial frequency and a second initial frequency when the display panel is in the frequency conversion state; wherein the first initial frequency and the second initial frequency are respectively the first frequency and the second frequency corresponding to the two adjacent frames acquired for a first time; and wherein the first initial frequency corresponds to a frame preceding the two adjacent frames, and the second initial frequency corresponds to a frame following the two adjacent frames. ### Claim 2 (depends on 1) The display method of claim 1, wherein when the difference between the first initial frequency and the second initial frequency is greater than 0 and less than the frequency mode setting threshold, the frame number for display mode determination is equal to a highest frequency of the display panel corresponding to the first display mode. ### Claim 3 (depends on 1) The display method of claim 1, wherein when the difference between the second initial frequency and the first initial frequency is greater than or equal to 0 and less than the frequency mode setting threshold, the frame number for display mode determination is equal to twice a highest frequency of the display panel corresponding to the first display mode. ### Claim 4 (depends on 1) The display method of claim 1, wherein C>(fmax-fmin)/step; and wherein C represents the frequency mode setting threshold, fmax and fmin respectively represent a highest frequency and a lowest frequency corresponding to the display panel in the first display mode, and step represents a number of frequency gradients corresponding to a frequency transition from the lowest frequency to the highest frequency in the first display mode of the display panel. ### Claim 5 (depends on 1) The display method of claim 1, wherein the step of determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times further comprises: if the absolute value of the difference between the first frequency and the second frequency is greater than the frequency mode setting threshold, determining that the display panel is not in the first display mode; wherein the display method further comprises: when the display panel is not in the first display mode, controlling the brightness adjustment function of the display panel to be in an on state. ### Claim 6 (depends on 1) The display method of claim 1, wherein before a step of if the display panel is in the frequency conversion state, acquiring the first frequency and the second frequency corresponding to the two adjacent frames consecutively for multiple times further comprises: controlling the brightness adjustment function of the display panel to be in an on state. ### Claim 7 A display device, comprising: a display panel having a first display mode, wherein a frequency of the display panel in the first display mode gradually changes; a timing controller configured to acquire a first frequency and a second frequency corresponding to two adjacent frames multiple times, determine whether the display panel is in the first display mode according to a difference between the first frequency and the second frequency obtained multiple times, and output a voltage adjustment off signal when the display panel is in the first display mode; and a power management chip configured to receive the voltage adjustment off signal to stop outputting an adjustment voltage to the display panel, thereby stopping a brightness adjustment function of the display panel; wherein determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times comprises: if an absolute value of the difference between the first frequency and the second frequency acquired N consecutive times is less than a setting threshold for frequency mode, determining that the display panel is in the first display mode, wherein N is a frame number for display mode determination; wherein the frame number for display mode determination is determined according to a first initial frequency and a second initial frequency when the display panel is in a frequency conversion state; wherein the first initial frequency and the second initial frequency are respectively the first frequency and the second frequency corresponding to the two adjacent frames acquired for a first time; and wherein the first initial frequency corresponds to a frame preceding the two adjacent frames, and the second initial frequency corresponds to a frame following the two adjacent frames. ### Claim 8 (depends on 7) The display device of claim 7, wherein the timing controller is configured to acquire the first frequency and the second frequency corresponding to the two adjacent frames 2fmax times and determine that the display panel is in the first display mode when an absolute value of the difference between the first frequency and the second frequency obtained each time is less than a frequency mode setting threshold; wherein the frequency mode setting threshold represents C>(fmax-fmin)/step; and wherein fmax and fmin respectively represent a highest frequency and a lowest frequency corresponding to the display panel in the first display mode, and step represents a number of frequency gradients corresponding to a frequency transition from the lowest frequency to the highest frequency in the first display mode of the display panel. ### Claim 9 A display method of a display panel, wherein the display panel has a first display mode, a frequency of the display panel in the first display mode gradually changes, and the display method of the display panel comprises: determining whether the display panel is in a frequency conversion state; if the display panel is in the frequency conversion state, acquiring a first frequency and a second frequency corresponding to two adjacent frames consecutively for multiple times; determining whether the display panel is in the first display mode according to a difference between the first frequency and the second frequency obtained multiple times, wherein a step of determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times comprises determining whether an absolute value of the difference between the first frequency and the second frequency acquired each time is less than a setting threshold for frequency mode; and if the display panel is in the first display mode, turn off a brightness adjustment function of the display panel; wherein the step of determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times comprises: if the absolute value of the difference between the first frequency and the second frequency acquired N consecutive times is less than the setting threshold for frequency mode, determining that the display panel is in the first display mode, wherein N is a frame number for display mode determination; wherein the frame number for display mode determination is determined according to a first initial frequency and a second initial frequency when the display panel is in the frequency conversion state; wherein the first initial frequency and the second initial frequency are respectively the first frequency and the second frequency corresponding to the two adjacent frames acquired for a first time; and wherein the first initial frequency corresponds to a frame preceding the two adjacent frames, and the second initial frequency corresponds to a frame following the two adjacent frames. ### Claim 10 (depends on 9) The display method of claim 9, wherein when the difference between the first initial frequency and the second initial frequency is greater than 0 and less than the frequency mode setting threshold, the frame number for display mode determination is equal to a highest frequency of the display panel corresponding to the first display mode. ### Claim 11 (depends on 9) The display method of claim 9, wherein when the difference between the second initial frequency and the first initial frequency is greater than or equal to 0 and less than the frequency mode setting threshold, the frame number for display mode determination is equal to twice a highest frequency of the display panel corresponding to the first display mode. ### Claim 12 (depends on 9) The display method of claim 9, wherein C>(fmax-fmin)/step; and wherein C represents the frequency mode setting threshold, fmax and fmin respectively represent a highest frequency and a lowest frequency corresponding to the display panel in the first display mode, and step represents a number of frequency gradients corresponding to a frequency transition from the lowest frequency to the highest frequency in the first display mode of the display panel. ### Claim 13 (depends on 9) The display method of claim 9, wherein the step of determining whether the display panel is in the first display mode according to the difference between the first frequency and the second frequency obtained multiple times further comprises: if the absolute value of the difference between the first frequency and the second frequency is greater than the frequency mode setting threshold, determining that the display panel is not in the first display mode; wherein the display method further comprises: when the display panel is not in the first display mode, controlling the brightness adjustment function of the display panel to be in an on state. ### Claim 14 (depends on 9) The display method of claim 9, wherein before a step of if the display panel is in the frequency conversion state, acquiring the first frequency and the second frequency corresponding to the two adjacent frames consecutively for multiple times further comprises: controlling the brightness adjustment function of the display panel to be in an on state.