Dimming method of display panel, driving module and display device

Abstract

The invention discloses a dimming method of a display panel, a driving module and a display device. The display panel comprises a first brightness node; the dimming method comprises the following steps: a light-emitting control signal under a first brightness node comprises N first pulse groups in one frame, wherein N is an integer greater than or equal to 1; the first pulse group comprises one first pulse and M second pulses behind the first pulse, and M is an integer greater than or equal to 1; the extinguishing level width of the first pulse is T1-delta t1, and the extinguishing level width of the second pulse is T1 + delta t1 / M; t1 is a first set value, delta t1 is a first adjustment value, T1 is greater than zero, and delta t1 is greater than zero; t1-delta t1 is greater than zero; the brightness level of the display panel is larger than that of the first brightness node, and the turn-off level width of a first pulse of the light-emitting control signal under the brightness node adjacent to the first brightness node in one frame is smaller than that of the first pulse. The display effect of the display panel can be improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a dimming method of a display panel, a driving module and a display device. Background Art

[0002] With the development of display technology, the application of display panels is becoming more and more extensive, and correspondingly, the requirements for display panels are becoming higher and higher.

[0003] However, the display panel in the related art has a phenomenon of poor display. Summary of the invention

[0004] The present invention provides a dimming method, a driving module and a display device for a display panel, so as to improve the display effect of the display panel.

[0005] According to one aspect of the present invention, a dimming method for a display panel is provided, wherein the display panel includes a first brightness node; the dimming method includes:

[0006] The light emitting control signal at the first brightness node includes N first pulse groups in one frame, where N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, where M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero;

[0007] The brightness level of the display panel is greater than the brightness level of the first brightness node, and the extinguishing level width of the first pulse of the light emitting control signal under the brightness node adjacent to the first brightness node in one frame is smaller than the extinguishing level width of the first pulse.

[0008] Optionally, the display panel includes a plurality of second brightness nodes, and the brightness level of the second brightness nodes is greater than the brightness level of the first brightness nodes;

[0009] The extinction level width of the first pulse of the light emitting control signal at the second brightness node adjacent to the first brightness node in one frame is smaller than the extinction level width of the first pulse;

[0010] Optionally, at multiple second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases as the brightness level decreases;

[0011] Optionally, at multiple second brightness nodes, the lighting level width of the first pulse of the light-emitting control signal within a frame decreases as the brightness level decreases.

[0012] Optionally, the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness level between the kth second brightness node and the k+1th second brightness node, is different from the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; k is an integer greater than or equal to 2;

[0013] And / or, the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node.

[0014] Optionally, the light-emitting control signal at the second brightness node includes N second pulse groups in one frame; the second pulse group includes a third pulse and M fourth pulses located after the third pulse; and the extinction level width of the third pulses in different second pulse groups in one frame is the same.

[0015] Optionally, the extinction level width of the fourth pulse in the same second pulse group in one frame is the same,

[0016] Preferably, the extinction level width of the fourth pulse in different second pulse groups in one frame is the same; the luminous control signal under the kth second brightness node in one frame, in the same second pulse group, the extinction level width of the third pulse is T2 k -Δt2 k , the extinguishing level width of the fourth pulse is T2 k +Δt2 k / M;T2 k is the second set value, Δt2 k is the second adjustment value, T2 k Greater than zero, Δt2 k Greater than zero; T2 k -Δt2 k greater than zero;

[0017] Optional, T2 k is the ratio of the sum of the extinguishing level widths of the third pulse and M fourth pulses in the same second pulse group of the light emitting control signal at the kth second brightness node divided by the number of pulses in the second pulse group;

[0018] Alternatively, the extinction level widths of at least two fourth pulses in the same second pulse group in one frame are different;

[0019] Optionally, the light emitting control signal at the kth second brightness node in one frame, in the same second pulse group, the extinguishing level width of the third pulse is T2 k -Δt2 k , the total width of the extinguishing level of M fourth pulses is M*T2 k +Δt2 k -Δt3 k , T2 k is the second set value, Δt2 k is the second adjustment value, Δt3 k is the third adjustment value, T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k Greater than zero; T2 k -Δt2 k Greater than zero.

[0020] Optionally, the extinction level width of the fourth pulse in the same second pulse group in one frame is different from the extinction level width of at least one third pulse;

[0021] Optionally, N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases as the brightness level of the second brightness node decreases;

[0022] Optionally, N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases linearly as the brightness level of the second brightness node decreases;

[0023] Optionally, N*(M+1)*T2 corresponding to the k+1th second brightness node k+1 N*(M+1)*T2 corresponding to the kth second brightness node k The absolute value of the ratio of the difference between the brightness levels of the kth second brightness node and the k+1th second brightness node is equal to the corresponding N*(M+1)*T2 under the kth second brightness node. k N*(M+1)*T2 corresponding to the k-1th second brightness node k-1 The absolute value of the ratio of the difference between the brightness levels of the k-1th second brightness node and the kth second brightness node.

[0024] Optionally, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of one fourth pulse in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M;

[0025] Optionally, M is an integer greater than or equal to 2;

[0026] Optionally, M is equal to 3;

[0027] And / or, Δt3 corresponding to the kth second brightness node k Greater than or equal to Δt3 corresponding to the k+1th second brightness node k+1 ;

[0028] And / or, in the same second pulse group corresponding to the kth second brightness node, the extinguishing level width of v fourth pulses in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k / v, v is an integer greater than or equal to 1, and v is less than or equal to M;

[0029] Optionally, v is an integer greater than or equal to 2.

[0030] And / or, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of at least one fourth pulse is T2 k +Δt2 k / M.

[0031] Optionally, the display panel includes a plurality of third brightness nodes, and at least one third brightness node is arranged between two adjacent second brightness nodes;

[0032] The light emitting control signal at the third brightness node includes N third pulse groups in one frame; the third pulse group includes a fifth pulse and M sixth pulses located after the fifth pulse; N is an integer greater than or equal to 2; the extinction level widths of the fifth pulses in different third pulse groups in one frame are the same;

[0033] The light-emitting control signal at the third brightness node between the kth second brightness node and the k+1th second brightness node has an extinction level width of the fifth pulse within one frame that is the same as the extinction level width of the third pulse of the light-emitting control signal of the kth second brightness node within one frame; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node.

[0034] Optionally, the display panel includes a plurality of third brightness nodes, and the plurality of third brightness nodes are arranged between two adjacent second brightness nodes;

[0035] The light emitting control signal at the third brightness node includes N third pulse groups in one frame; the third pulse group includes a fifth pulse and M sixth pulses located after the fifth pulse; N is an integer greater than or equal to 2; the extinction level widths of the fifth pulses in different third pulse groups in one frame are the same;

[0036] The total width of the extinguishing level of all the sixth pulses in the N third pulse groups in one frame of the light control signal at the i-th third brightness node between the k-th second brightness node and the k+1-th second brightness node is N*(M*T2 k +Δt2 k )+i*ΔH–N*Δt3 k(i) , where Δt3 k(i) Greater than or equal to 0 and less than Δt3 k , Δt3 k(i) As i increases, it decreases, or, Δt3 k(i) As i increases, it first decreases and then remains unchanged, ΔH is the fourth adjustment value, and ΔH is greater than 0; wherein the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; i is an integer greater than or equal to 1;

[0037] Optionally, ΔH is a fixed constant;

[0038] Optionally, Δt3 k(i) As i increases, it first decreases and then becomes 0;

[0039] Optionally, one or more third brightness nodes located between the kth second brightness node and the k+1th second brightness node and adjacent to the k+1th second brightness node have a corresponding Δt3 k(i) is equal to 0.

[0040] Optionally, among at least a portion of the third brightness nodes, the light emitting control signals of two adjacent third brightness nodes have N pairs or v*N+1 pairs of positions within one frame, and the extinction level widths of the sixth pulses corresponding to the positions are different; v is an integer greater than or equal to 1 and less than or equal to M;

[0041] And / or, among the multiple third brightness nodes located between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light emitting control signal under the kth second brightness node;

[0042] And / or, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-th third brightness node is greater than the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-1-th third brightness node;

[0043] And / or, when i is greater than or equal to (w-1)*N+1, and less than or equal to w*N, the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-th third brightness node is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-1th third brightness node; w is greater than or equal to 2, and less than or equal to M;

[0044] Optionally, among the multiple third brightness nodes located between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node by ΔH, or the difference between the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame and the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node is greater than or equal to ΔH-Δt3 k(1) ,

[0045] And / or, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-th third brightness node in one frame is greater than the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-1-th third brightness node in one frame by ΔH, or the difference between the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-th third brightness node in one frame and the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-1-th third brightness node in one frame is greater than or equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) );

[0046] And / or, when i is greater than or equal to (w-1)*N+1 and less than or equal to wN, the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal under the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal under the i-1 third brightness node in one frame by ΔH, or the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal under the i-th third brightness node in one frame minus the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal under the i-1 third brightness node in one frame is greater than or equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ); w is greater than or equal to 2, and less than or equal to M.

[0047] Optionally, the display panel further comprises a plurality of fourth brightness nodes, and the brightness level of the fourth brightness nodes is greater than the brightness level of the second brightness nodes;

[0048] The light emitting control signal at the fourth brightness node includes N fourth pulse groups within one frame time; the fourth pulse group includes M+1 seventh pulses;

[0049] Optionally, the total width of the extinguishing levels of the light emitting control signals at the plurality of fourth brightness nodes within one frame increases as the brightness level of the fourth brightness node decreases;

[0050] Optionally, the total width of the extinguishing levels of the light emitting control signals at the plurality of fourth brightness nodes within one frame increases linearly with the decrease of the brightness level of the fourth brightness node;

[0051] Optionally, the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the p+1th fourth brightness node in one frame and the extinction level width of the light-emitting control signal at the pth fourth brightness node in one frame, to the difference in brightness level between the pth fourth brightness node and the p+1th fourth brightness node, is equal to the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the pth fourth brightness node in one frame and the extinction level width of the light-emitting control signal at the p-1th fourth brightness node in one frame, to the difference in brightness level between the p-1th fourth brightness node and the pth fourth brightness node; wherein, the brightness level of the pth fourth brightness node is greater than the brightness level of the p+1th fourth brightness node; p is an integer greater than or equal to 2;

[0052] Optionally, in the same fourth pulse group, the extinction level width of the first seventh pulse is greater than or equal to the extinction level widths of the remaining seventh pulses.

[0053] Optionally, the display panel includes a plurality of fifth brightness nodes, and a plurality of fifth brightness nodes are provided between two adjacent fourth brightness nodes;

[0054] The total width of the extinguishing level of the light emitting control signals at the plurality of fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases as the brightness level of the fifth brightness node decreases;

[0055] Optionally, the total width of the extinguishing levels of the light emitting control signals at the plurality of fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases linearly with the decrease of the brightness level of the fifth brightness node;

[0056] Optionally, among the multiple fifth brightness nodes between two adjacent fourth brightness nodes, the absolute value of the ratio of the difference between the extinction level width of the light emitting control signal under the j+1th fifth brightness node in one frame and the extinction level width of the light emitting control signal under the jth fifth brightness node in one frame, to the difference in brightness level between the jth fifth brightness node and the j+1th fifth brightness node, is equal to the absolute value of the ratio of the difference between the extinction level width of the light emitting control signal under the jth fifth brightness node in one frame and the extinction level width of the light emitting control signal under the j-1th fifth brightness node in one frame, to the difference in brightness level between the j-1th fifth brightness node and the jth fifth brightness node; wherein, the brightness level of the jth fifth brightness node is greater than the brightness level of the j+1th fifth brightness node; j is an integer greater than or equal to 2;

[0057] Optionally, the light emitting control signal under the fifth brightness node includes N fifth pulse groups within one frame time; the fifth pulse group includes M+1 eighth pulses, and the light emitting control signals of two adjacent fifth brightness nodes have only one pair of eighth pulses corresponding to different positions in one frame.

[0058] Among the multiple fifth brightness nodes between two adjacent fourth brightness nodes, when j is greater than or equal to 1 and less than or equal to N, the extinction level width of the first eighth pulse of the first j fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level among the two adjacent fourth brightness nodes by a fifth adjustment value; when j is greater than or equal to (q-1)*N+1 and less than or equal to q*N, the extinction level width of the first q-1 eighth pulses of the N fifth pulse groups and the qth eighth pulse of the first j-(q-1)*N fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level among the two adjacent fourth brightness nodes by a fifth adjustment value; q is greater than or equal to 2 and less than or equal to M; the fifth adjustment value is greater than 0;

[0059] Optionally, the fifth adjustment value is a fixed constant greater than 0;

[0060] Optionally, the light control signals corresponding to the j-th fifth brightness node and the j-1-th fifth brightness node between two adjacent fourth brightness nodes within one frame, and the extinction level width of the b-th eighth pulse in the a-th eighth pulse group are different; wherein, when j is not an integer multiple of N, a is the remainder of j / N, and b is the quotient of (j+N) / N; when j is an integer multiple of N, a is N, b is j / N, and j is greater than or equal to 2.

[0061] Optionally, there are multiple first brightness nodes, the brightness levels of the multiple first brightness nodes decrease in sequence, and the light emitting control signals under the multiple first brightness nodes are the same;

[0062] Alternatively, the display panel includes at least one sixth brightness node,

[0063] The brightness level of the sixth brightness node is lower than the brightness level of the first brightness node, and the light-emitting control signal at the sixth brightness node is the same as the light-emitting control signal at the first brightness node.

[0064] Optionally, N is an integer greater than or equal to 2;

[0065] and / or, M is an integer greater than or equal to 2;

[0066] and / or, at the same grayscale or maximum grayscale, the greater the brightness level of the brightness node, the greater the corresponding brightness;

[0067] And / or, the display panel includes a pixel circuit, and a data writing phase of the pixel circuit overlaps with a period of an extinguishing level of a first pulse of a light emitting control signal connected to the pixel circuit within a frame;

[0068] And / or, T1 is the ratio of the sum of the extinction level widths of the first pulse and M second pulses in the same first pulse group divided by the number of pulses in the first pulse group.

[0069] According to another aspect of the present invention, a dimming method for a display panel is provided, wherein the display panel includes a first brightness node and a plurality of second brightness nodes, and the brightness level of the second brightness nodes is greater than the brightness level of the first brightness nodes; the dimming method includes:

[0070] Receive a light-emitting control signal, wherein the light-emitting control signal at the first brightness node includes N first pulse groups in one frame, where N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, where M is an integer greater than or equal to 1; and the extinction level width of the first pulse is smaller than the extinction level width of the second pulse;

[0071] The light emitting control signal at the second brightness node adjacent to the first brightness node has a first pulse in a frame whose extinguishing level width is smaller than the extinguishing level width of the first pulse;

[0072] Under multiple second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases as the brightness level decreases.

[0073] Optionally, at multiple second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases nonlinearly as the brightness level decreases;

[0074] and / or, the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness level between the kth second brightness node and the k+1th second brightness node, is different from the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; k is an integer greater than or equal to 2;

[0075] And / or, the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node.

[0076] Optionally, the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, and Δt1 is greater than zero; T1-Δt1 is greater than zero, and T1 is a ratio of the sum of the extinction level widths of the first pulse and M second pulses in the same first pulse group divided by the number of pulses in the first pulse group;

[0077] Optionally, M is an integer greater than or equal to 2;

[0078] Optionally, M is equal to 3;

[0079] Optionally, the brightness level of the display panel is greater than the light emitting control signal at the brightness node of the first brightness node, and the number of pulses in one frame is the same as the number of pulses in one frame of the light emitting control signal at the first brightness node;

[0080] The brightness level of the display panel is greater than the first brightness node and the light emitting control signal at the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in a frame is smaller than the extinction level width of the first pulse.

[0081] Optionally, the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness level between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth brightness node is greater than the brightness level of the k+1th second brightness node;

[0082] Optionally, the light emitting control signal at the second brightness node includes N second pulse groups in one frame; the second pulse group includes a third pulse and M fourth pulses located after the third pulse; and the extinction level widths of the third pulses in different second pulse groups in one frame are the same;

[0083] Optionally, the extinction level width of the third pulse in the same second pulse group is smaller than the extinction level width of the fourth pulse;

[0084] Optionally, the light emitting control signal at the kth second brightness node in one frame, in the same second pulse group, the extinguishing level width of the third pulse is T2 k -Δt2 k , the total width of the extinguishing level of M fourth pulses is M*T2 k +Δt2 k -Δt3 k , T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k greater than zero;

[0085] Optionally, N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases linearly as the brightness level of the second brightness node decreases;

[0086] Optionally, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of one fourth pulse in the M fourth pulses is T2k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M.

[0087] According to another aspect of the present invention, a driving module is provided, the driving module is used to output a light emitting control signal,

[0088] Among them, the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero;

[0089] The brightness level is greater than the brightness level of the first brightness node, and the light emitting control signal under the brightness node adjacent to the first brightness node has an extinction level width of the first pulse in one frame that is smaller than the extinction level width of the first pulse.

[0090] According to another aspect of the present invention, a display device is provided, including a display panel and a driving module, wherein the driving module is used to output a light emitting control signal to the display panel.

[0091] Among them, the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is the first set value, Δt1 is the first adjustment value, T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero; the brightness level is greater than the brightness level of the first brightness node, and the light-emitting control signal under the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse.

[0092] The technical solution of the embodiment of the present invention adopts a dimming method of a display panel, wherein the display panel includes a first brightness node; the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, where N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, and the light-emitting control signal under the brightness node whose brightness level of the display panel is greater than the first brightness node and adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse. The light-emitting control signal under the brightness node whose brightness level is greater than the first brightness node is configured, and the extinction level width in one frame is less than the extinction level width of the first pulse, so that as the brightness level decreases, the extinction level width of the first pulse of the light-emitting control signal shows a unidirectional increasing trend, and there will be no sudden decrease in brightness during the process of increasing the brightness level, thereby avoiding the problem of brightness inversion.

[0093] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0095] Figure 1 A timing diagram of a dimming method of a display panel in the related art;

[0096] Figure 2 A timing diagram of another dimming method of a display panel in the related art;

[0097] Figure 3 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0098] Figure 4 A schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0099] Figure 5 for Figure 4 A timing diagram of

[0100] Figure 6 A timing diagram of a dimming method for a display panel provided by an embodiment of the present invention;

[0101] Figure 7 for Figure 6A partial enlarged view of

[0102] Figure 8 A schematic diagram of a variation trend of the extinction level width of a first pulse of a second brightness node provided by an embodiment of the present invention;

[0103] Fig. 9 A timing diagram of another display panel dimming method provided by an embodiment of the present invention;

[0104] Fig.10 A timing diagram of another display panel dimming method provided by an embodiment of the present invention;

[0105] Fig.11 A timing diagram of another display panel dimming method provided by an embodiment of the present invention;

[0106] Fig.12 A schematic diagram of a light emitting control signal generation method provided by an embodiment of the present invention;

[0107] Fig.13 A schematic diagram of the structure of a driving module provided by an embodiment of the present invention;

[0108] Fig.14 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0109] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0110] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0111] In the related art, the display panel is prone to brightness inversion when the brightness changes. After extensive research, the inventors found that the reason for this technical problem is that in the related art, the brightness of the display panel is changed by changing the total duty cycle of the off-level of the light-emitting control signal within one frame time. The total duty cycle of the off-level of the light-emitting control signal (or total pulse width) increases linearly, and as the brightness level decreases, the off-level width of the first pulse of the light-emitting control signal within one frame also increases linearly, then the stroboscopic effect visibility measure (SVM, Stroboscopic effect visibility measure) index is poor. If, on the basis of the linear increase in the total duty cycle of the off-level of the light-emitting control signal within one frame time, a solution considering SVM is incorporated, such as Figure 1 As shown, Figure 1 It is a timing diagram of a dimming method of a display panel in the related art. Among them, the timing under each brightness node is the timing of the light-emitting control signal. The brightness levels of the brightness nodes DBV(1) to DBV(6) decrease successively, and the brightness level of the first brightness node DBV1 is lower than the brightness level of the brightness node DBV(6). Each brightness node includes a plurality of pulse groups P, and each pulse group P includes a plurality of pulses. Without considering the SVM improvement scheme, the falling edge of each extinction level pulse under the first brightness node DBV1 should be shown as a dotted line, which is similar to the light-emitting control signal under other brightness nodes, that is, the extinction level pulse width of each pulse is equal, and as the brightness level decreases, the extinction level pulse width increases. For example, the extinction level is a high level. After considering the SVM scheme, the falling edge corresponding to each extinction level pulse under the first brightness node DBV1 is shown as a solid line. In other words, the SVM improvement solution is to fix the pulse width of the first extinguishing level pulse in the light control signal corresponding to some brightness nodes. Although it can improve the SVM index, the high level width of the first extinguishing level pulse at each brightness node is reversed, that is, a special situation of decreasing under the increasing trend occurs, which leads to brightness reversal when the brightness level of the display panel changes. That is, when dragging the brightness bar, some nodes that should have decreased brightness will increase in brightness.

[0112] In view of the above technical problems, the present invention proposes the following solutions:

[0113] First, a structure of a display panel is introduced. Those skilled in the art should understand that the exemplary introduction of the display panel in this embodiment does not limit the display panel, and the dimming method can also be applied to other types of display panels. Figures 3 to 5 As shown, Figure 3 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, Figure 4 A schematic diagram of a pixel circuit according to an embodiment of the present invention is provided. Figure 5 for Figure 4 A timing diagram of the display panel includes a display area and a non-display area. The non-display area may surround at least a portion of the display area. A plurality of gate lines and data lines (DL1-DLn) are arranged in a horizontal and vertical manner in the display area, and a plurality of pixel circuits 10 arranged in an array are also arranged in the display area, each data line is connected to a pixel circuit of a corresponding column (e.g., one column), and each gate line is connected to a pixel circuit of a corresponding row (e.g., one row or multiple rows). Figure 3 As shown, Figure 3 The gate lines in the display panel include scan line groups (GL1-GLk) and light-emitting control signal lines (EM1-EMk), wherein each scan line group includes at least one scan line. The display panel may include a data driving circuit 20. The data driving circuit 20 is electrically connected to the data lines and is used to provide data signals to the data lines. The display panel may include a scan driving circuit 30. The scan driving circuit 30 is electrically connected to the scan lines and is used to provide scan signals to the scan lines. The display panel may include a light-emitting control signal generating circuit 40. The light-emitting control signal generating circuit 40 is used to provide a light-emitting control signal to the light-emitting control signal line. The data driving circuit 20 may be located in a non-display area. The scan driving circuit 30 may be located in a non-display area. The light-emitting control signal generating circuit 40 may be located in a non-display area.

[0114] The sub-pixel may include a pixel circuit and a light-emitting element PX. The pixel circuit is connected to the light-emitting element PX. Figure 3As shown, the pixel circuit includes part or all of a driving transistor T1, a data writing transistor T2, a threshold compensation transistor T3, a first initialization transistor T4, a first light emission control transistor T5, a second light emission control transistor T6, a second initialization transistor T7, a third initialization transistor T8, and a storage capacitor Cst. The first end of the data writing transistor T2 is electrically connected to the corresponding data line DL, the second end of the data writing transistor T2 is electrically connected to the first end of the driving module T1, and the control end of the data writing transistor T2 is electrically connected to the first scan line SP1; the first end of the first light emitting control transistor T5 is electrically connected to the first end of the driving transistor T1, the second end of the first light emitting control transistor T5 is electrically connected to the first power signal line ELVDD, and the control end of the first light emitting control transistor T5 is electrically connected to the corresponding light emitting control signal line EM; the first end of the threshold compensation transistor T3 is electrically connected to the second end of the driving transistor T1, the second end of the threshold compensation transistor T3 is electrically connected to the control end of the driving transistor T1, and the control end of the threshold compensation transistor T3 is electrically connected to the second scan line SN2; the first end of the storage capacitor Cst is electrically connected to the first power signal line ELVDD, and the second end of the storage capacitor Cst is electrically connected to the control end of the driving transistor T1; the first end of the first initialization transistor T4 is electrically connected to the first initialization signal line Vrefn1, and the second end of the first initialization transistor T4 is electrically connected to the threshold compensation transistor T3. The first end of the body transistor T3 is electrically connected to the control end of the driving transistor T1, and the control end of the first initialization transistor T4 is electrically connected to the third scanning signal line SN1; the first end of the second light-emitting control transistor T6 is electrically connected to the second end of the driving transistor T1, the second end of the second light-emitting control transistor T6 is electrically connected to the first end of the light-emitting element PX, and the control end of the second light-emitting control transistor T6 is electrically connected to the corresponding light-emitting control signal line EM; the first end of the second initialization transistor T7 is electrically connected to the second initialization signal line Vrefn2, the second end of the second initialization transistor T7 is electrically connected to the first end of the light-emitting element PX, and the control end of the second initialization transistor T7 is electrically connected to the fourth scanning signal line SP2; the first end of the third initialization transistor T8 is electrically connected to the third initialization signal line Vrefp, the second end of the third initialization transistor T8 is electrically connected to the second end of the driving transistor T1 or the first end of the driving transistor T1, and the control end of the third initialization transistor T8 is electrically connected to the fourth scanning signal line SP2; the second end of the light-emitting element PX is electrically connected to the second power signal line ELVSS. Among the above transistors, the threshold compensation transistor T3 and the first initialization transistor T4 can be oxide transistors, such as indium gallium zinc oxide transistors, and the remaining transistors can be single crystal silicon or polycrystalline silicon transistors. This pixel circuit can also become a pixel circuit with LTPO (Low Temperature Polycrystalline Oxide) structure.The pixel circuit of the LTPO structure has a lower leakage current, which is more conducive to realizing low-frequency display. The light-emitting element PX can be OLED (Organic Light Emitting Diode), Micro LED (Micro Light Emitting Diode) or Mini LED (mini Light Emitting Diode). In addition,. Figure 1 Each gate line group includes a first scan signal line SP1, a second scan signal line SN2, a third scan signal line SN1 and a fourth scan signal line SP2.

[0115] like Figure 5 As shown, the working process of the pixel circuit includes an initialization phase t1, a data writing phase t2 and a light emitting phase t3.

[0116] In the initialization stage t1, the signals on the second scanning signal line SN2, the third scanning signal line SN1 and the fourth scanning signal line SP2 control the corresponding transistors to turn on, the initialization signal on the first initialization signal line Vrefn1 resets the control end of the driving transistor T1; the initialization signal on the second initialization signal line Vrefn2 resets the first end of the light-emitting element PX; the initialization signal on the third initialization signal line Vrefp resets the second end or the first end of the driving transistor T1.

[0117] In the data writing stage t2, the signal on the first scanning signal line SP1 controls the data writing transistor T2 to turn on, and the signal on the second scanning signal line SN2 controls the threshold compensation transistor T3 to turn on; after the data voltage on the data line DL passes through the data writing transistor T2, the driving transistor T1 and the threshold compensation transistor T3, the voltage obtained after the threshold voltage of the driving transistor T1 is compensated to the data voltage is written into the control end of the driving transistor T1. When the voltage difference between the control end and the second end of the driving transistor T1 is less than the threshold voltage of the driving transistor T1, the driving transistor T1 is turned off, so that the voltage at the control end of the driving transistor T1 and / or the voltage stored in the storage capacitor Cst include the threshold voltage information of the driving transistor T1.

[0118] During the initialization stage t1 and the data writing stage t2, when the signal on the light-emitting control signal line EM is at an off level (for example, the cut-off level of the first light-emitting control transistor T5 and the second light-emitting control transistor T6, for example, a high level), the first light-emitting control transistor T5 and the second light-emitting control transistor T6 can be controlled to be turned off, and the light-emitting element PX can be controlled not to emit light.

[0119] In the light-emitting stage t3, the signal on the light-emitting control signal line EM controls the first light-emitting control transistor T5 and the second light-emitting control transistor T6 to be turned on. The driving transistor T1 generates a driving current, and the light-emitting element PX emits light in response to the driving current. In the light-emitting stage t3, the threshold compensation transistor T3 and the first initialization transistor T4 have a small leakage current, so the above-mentioned pixel circuit is more conducive to realizing low-frequency display. When the signal on the light-emitting control signal line EM is a lighting level (for example, the conduction level of the first light-emitting control transistor T5 and the second light-emitting control transistor T6, such as a low level), the first light-emitting control transistor T5 and the second light-emitting control transistor T6 can be controlled to be turned on, and the light-emitting element PX can be controlled to emit light. The duration of the extinguishing level in each pulse of the signal on the light-emitting control signal line EM can be the extinguishing level width, and the duration of the lighting level can be the lighting level width. For example, in each pulse, the extinguishing level period is before the lighting level period. In some embodiments, in each pulse, the extinguishing level period is after the lighting level period, which can be set as needed.

[0120] In addition, in the light-emitting stage t3, the light-emitting control signal is provided with a plurality of pulses, and during the pulse time, the light-emitting element PX does not emit light, and the pulse of the light-emitting control signal can also be called a black-insertion pulse.

[0121] Figure 6 A timing diagram of a dimming method for a display panel provided by an embodiment of the present invention, Figure 7 for Figure 6 For a partial enlarged view, see Figure 6 and Figure 7 ,in, Figure 6 Each timing sequence in is the timing sequence of the light-emitting control signal. Figure 7 yes Figure 6The enlarged view of the dotted box part in the figure. The display panel includes a first brightness node DBV1; the dimming method includes: the light-emitting control signal under the first brightness node DBV1 includes N first pulse groups P1 in one frame T (which can be each frame in one or more frames at a preset refresh frequency), N is an integer greater than or equal to 1; the first pulse group P1 includes 1 first pulse P11 and M second pulses P12 located after the first pulse P11, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse P12 is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero; the brightness level of the display panel is greater than the brightness level of the first brightness node DBV1, and the light-emitting control signal under the brightness node adjacent to the first brightness node DBV1, the extinction level width of the first pulse in one frame T is less than the extinction level width of the first pulse P11. For example, at the first brightness node DBV1, the extinction level widths of the pulses at corresponding positions in the N first pulse groups P1 may be the same, for example, the extinction level widths of the first pulses in the N first pulse groups P1 may be the same, for example, the extinction level widths of the second pulses in the N first pulse groups P1 may be the same, for example, the extinction level widths of multiple second pulses in the same first pulse group P1 may be the same. For example, at the first brightness node DBV1, the lighting level widths of the pulses at corresponding positions in the N first pulse groups P1 may be the same. For example, in the same first pulse group P1, the extinction level width of the second pulse P12 is greater than the extinction level width of the first pulse by (1+1 / M)*Δt1.

[0122] Specifically, the display panel has multiple brightness nodes. Under the same grayscale (e.g., maximum grayscale), the higher the brightness level, the higher the brightness of the display panel; the lower the corresponding brightness level, the lower the brightness of the display panel; before dimming, the display panel will first fix multiple brightness nodes, configure the light control signals corresponding to the brightness nodes, and then the driver chip will automatically calculate the light control signals corresponding to the brightness levels between the brightness nodes. The brightness of the display panel can be adjusted in a variety of ways, such as DC (Direct Current) dimming, AC (alternating current) dimming, and DC and AC mixed dimming. Among them, DC dimming refers to adjusting the size of the data signal to adjust the current of the light, thereby adjusting the brightness; AC dimming refers to the size of the data signal remains unchanged, and the light brightness is controlled by adjusting the black insertion ratio in the light control signal, that is, the total duty cycle of the pulse, the number of pulses, the width of a single pulse, and one or more other methods. Usually, in a lower brightness level range, a mixed dimming method of AC dimming and DC dimming can be used; in a higher brightness level range, a DC dimming method is used; in other brightness level ranges, an AC dimming method is used. Among them, the specific brightness level interval that requires the AC dimming method is well known to those skilled in the art and will not be repeated here. The display panel includes N pulse groups, each pulse group includes M+1 pulses, for example, N can be 3, M can be 3, that is, the light control signal includes 12 pulses in one frame T. Of course, N and M can also be other values, and this embodiment does not specifically limit this. In a related AC dimming scheme, there is only one dimming method for the brightness interval of AC dimming, that is, first select some brightness nodes, configure the total width of the extinction level of the selected brightness nodes, and configure the extinction level width of each pulse to be equal. Then the light control signal between two adjacent brightness nodes is determined by interpolation. Figure 2 FIG. 1 is a timing diagram of another dimming method of a display panel in the related art. Specifically, Figure 1 and Figure 2 As shown, Figure 1 Take the brightness node with brightness level between the brightness node DBV(3) and the brightness node DBV(4) as an example, and mark it as DBV(3) i , where i is equal to 1, 2, 3, 4, 5… Figure 2In the figure, the pulse whose extinction level pulse width is increased compared with the previous brightness node with a larger brightness level is marked as EP. If the total extinction level pulse width of the brightness nodes of two adjacent brightness levels differs by ΔH, then the specific interpolation method is as follows: for the brightness level adjacent to the brightness node DBV(3), such as defined as brightness node (3)1, the extinction level width of the first pulse in its first pulse group P is increased by ΔH compared with the extinction level width of the first pulse in the first pulse group of the brightness node DBV(3), and the other pulses are consistent with the pulses of the brightness node DBV(3). For the light-emitting control signal under the brightness node of the next brightness level, such as defined as brightness node (3)2, the first pulse in its second pulse group is increased by ΔH compared with the brightness node (3)1, and the other pulses are consistent with the pulses of the brightness node DBV(3)1. By analogy, when the brightness node DBV(3) n The extinguishing level width of the first pulse in the Nth pulse group increases by ΔH, which is equivalent to adding ΔH to all the first pulses in the N first pulse groups. n+1 , and then increase the extinction level width of the second pulse in the first pulse group, that is, the extinction level width of the second pulse in the first pulse group of the brightness node DBV(3)4 is increased by one ΔH compared to the brightness node DBV(3)3, and the other pulses are consistent with the pulse of the brightness node DBV(3)3. Then at the next brightness node, increase the extinction level width of the second pulse in the second pulse group, and so on. It should be noted that the extinction level of the light-emitting control signal is the level at which the light-emitting control module in the pixel circuit is turned off to control the light-emitting element PX not to emit light. Each pulse of the light-emitting control signal includes an extinction level and an on level. The on level of the light-emitting control signal is the level at which the light-emitting control module in the pixel circuit is turned on to control the light-emitting element PX to emit light. The periods of all pulses are equal. In this embodiment, the extinction level is a high level; of course, in some other implementations, the extinction level may also be a low level. In the related art, as the brightness level changes, the extinction level width of the first pulse of the light control signal within a frame time changes linearly; for example, as the brightness level decreases linearly, the extinction level width of the first pulse of the light control signal within a frame time will increase linearly.

[0123] If the extinguishing level width of each pulse of the light emitting control signal under the first brightness node DBV1 in one frame is equal (similar to Figure 1The falling edge of each pulse under the first brightness improvement node in should be the waveform shown by the dotted line), the SVM index obtained by the test is poor, because the data writing phase of the pixel circuit overlaps with the time period of the extinction level of the first pulse of the light-emitting control signal connected to the pixel circuit in one frame, and the time period of the extinction level of the remaining pulses does not overlap with the data writing phase of the pixel circuit. Therefore, the working states of the pixel circuits corresponding to the first pulse and the remaining pulses of the light-emitting control signal in one frame are different, resulting in a large difference in brightness changes corresponding to the first pulse of the light-emitting control signal in one frame and the brightness changes corresponding to the remaining pulses, resulting in poor SVM indicators.

[0124] In this embodiment, Figure 6 The first brightness node DBV1 can be understood as an SVM improvement node. The total width of the extinction level of the light-emitting control signal of the first brightness node DBV1 within a frame T will be determined according to the brightness level of the first brightness node DBV1. In other words, the total width of the extinction level of the light-emitting control signal of the first brightness node DBV1 within a frame is fixed. Regardless of whether it is set as an SVM improvement node, its total pulse width is a fixed value, for example, fixed to TT. Then the value of T1 is TT / (M*N). In other words, TT=M*N*T1. After the brightness node is set as an SVM improvement node, the extinction level width of the first pulse in each pulse group needs to be reduced, such as Figure 6 As shown, the specific reduced value is Δt1, and it can be understood that Δt1 is greater than 0. And because the total width of the blackout level still needs to be maintained at TT, it is necessary to evenly compensate Δt1 to the M second pulses P12 in each pulse group, so the blackout level width of each second pulse P12 is T1+Δt1 / M, and the purpose of SVM improvement is achieved.

[0125] In the above analysis, the first pulse width of the light emitting control signal at the first brightness node in one frame is reduced to improve the SVM index, but a brightness inversion problem will occur at the first brightness node DBV1. Figure 6 As shown, in this embodiment, the light-emitting control signals under all brightness nodes having a brightness level greater than the first brightness node DBV1 are configured, and the extinction level width of the first pulse in a frame T is smaller than the extinction level width of the first pulse, so that as the brightness level decreases, the width of the first pulse of the light-emitting control signal increases in a unidirectional manner, and there will be no sudden decrease during the increase, thereby avoiding the problem of brightness inversion. For example, at the same grayscale or maximum grayscale, the greater the brightness level of the brightness node, the greater the corresponding brightness. Optionally, N is an integer greater than or equal to 2. Optionally, M is an integer greater than or equal to 2. For example, T1 is the ratio of the sum of the extinction level widths of the first pulse and M second pulses in the same first pulse group divided by the number of pulses in the first pulse group (i.e., M+1).

[0126] The total width of the extinction level of the light control signal in one frame (for example, the sum of the extinction level widths of all pulses in one frame) gradually increases as the brightness level decreases, and the extinction level width of the first pulse also gradually increases as the brightness level decreases. A first brightness node can be set in a low brightness level interval. The first brightness node can be an SVM improvement node. Exemplarily, the brightness corresponding to the first brightness node is, for example, 2 nits.

[0127] According to the technical solution of the present embodiment, the display panel includes a first brightness node; the dimming method of the display panel includes receiving a light-emitting control signal, the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, and Δt1 is greater than zero; T1-Δt1 is greater than zero, the brightness level of the display panel is greater than the brightness level of the first brightness node, and the light-emitting control signal under the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse. The light-emitting control signals under all brightness nodes whose brightness levels are greater than the brightness level of the first brightness node are configured so that the extinction level width in one frame is smaller than the extinction level width of the first pulse, so that as the brightness level decreases, the width of the first pulse of the light-emitting control signal increases in a unidirectional manner without suddenly decreasing during the increase, thereby avoiding the problem of brightness inversion. T1 can be the ratio of the sum of the extinction level widths of the first pulse and the M second pulses in the same first pulse group divided by the number of pulses in the first pulse group, that is, the average value of the extinction level width. T1 can be the ratio of the sum of the extinction level widths of all pulses of the light-emitting control signal under the first brightness node in one frame divided by the number of pulses, that is, the average value of the extinction level width. The extinction level width of the first pulse is T1-Δt1, which is equivalent to that the extinction level width of the first pulse is Δt1 less than the average extinction level width corresponding to the first brightness node, and the extinction level width of the second pulse is T1+Δt1 / M, which is equivalent to that the extinction level width of the second pulse is Δt1 / M greater than the average extinction level width corresponding to the first brightness node, which is equivalent to that the difference between the average extinction level width corresponding to the first brightness node and the extinction level width of the first pulse (ie, Δt1) is M times the difference between the extinction level width of the second pulse and the average extinction level width corresponding to the first brightness node (ie, Δt1 / M). N can be 2, 3, 4 or 5, etc. M can be 2, 3, 4 or 5, etc. Figure 6 The case where N is 3 and M is 3 is shown as an example.

[0128] Optionally, continue to refer to Figure 6 , the display panel includes a plurality of second brightness nodes DBV2, the brightness level of the second brightness node DBV2 is greater than the brightness level of the first brightness node DBV1; the extinction level width of the first pulse of the light-emitting control signal under the second brightness node DBV2 adjacent to the first brightness node DBV1 within a frame T (which may be one or more frames in each frame at a preset refresh frequency) is less than the extinction level width of the first pulse P11. For example, the light-emitting control signal under the second brightness node DBV2 adjacent to the first brightness node DBV1 within a frame T (which may be one or more frames in each frame at a preset refresh frequency) has a light-emitting level width greater than the light-emitting level width of the first pulse P11. The light-emitting control signals of each brightness node in the present invention may correspond to the same refresh frequency. For example, at the same refresh frequency, the sum of the extinction level width and the light-emitting level width of each pulse of the light-emitting control signal of each brightness node (that is, the pulse period) is equal. For example, at the same refresh frequency, the number of pulses in one frame of the light-emitting control signal of each brightness node is equal.

[0129] For example, under multiple second brightness nodes DBV2, the extinguishing level width of the first pulse of the light control signal in one frame increases as the brightness level decreases. For example, under multiple second brightness nodes DBV2, the lighting level width of the first pulse of the light control signal in one frame decreases as the brightness level decreases.

[0130] Specifically, by inserting the second brightness node DBV2, the extinction level width of the first pulse of the light-emitting control signal corresponding to the second brightness node DBV2 in one frame is configured to be smaller than the extinction level width of the first pulse of the first brightness node DBV1, and increases as the brightness level decreases. For the first brightness node DBV1 and the plurality of second brightness nodes DBV2, as the brightness level decreases, the extinction level width of the first pulse of the light-emitting control signal in one frame tends to increase, thereby improving the brightness inversion problem; at the same time, the brightness transition can be made smoother on the basis of improving the SVM index and improving the brightness inversion problem.

[0131] For example, under multiple second brightness nodes, the extinguishing level width of the first pulse of the light control signal in one frame T increases nonlinearly as the brightness level decreases. For example, under multiple second brightness nodes, the lighting level width of the first pulse of the light control signal in one frame T decreases nonlinearly as the brightness level decreases.

[0132] For example, the nonlinear increase may be a curve or a broken line or a step-like trend increase. For example, the nonlinear decrease may be a curve or a broken line or a step-like trend decrease.

[0133] Optionally, Figure 8A schematic diagram of a variation trend of the extinction level width of the first pulse of the second brightness node provided by an embodiment of the present invention, with reference to Figure 6 and Figure 8 , the difference between the extinguishing level width of the first pulse of the light emitting control signal under the k+1 second brightness node DBV2(k+1) in one frame T and the first pulse of the light emitting control signal under the k second brightness node DBV2(k) in one frame T (for example, D k+1 -D k ), and the difference between the brightness levels of the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1) (e.g., L k -L k+1 ) ratio (for example, (D k+1 -D k ) / (L k -L k+1 )) is different from the difference between the first pulse of the light emitting control signal under the kth second brightness node DBV2(k) in one frame T and the first extinguishing level width of the light emitting control signal under the k-1th second brightness node DBV2(k-1) in one frame T (for example, D k -D k-1 ), and the difference between the brightness levels of the k-1th second brightness node DBV2(k-1) and the kth second brightness node DBV2(k) (e.g., L k-1 -L k ) ratio (for example, (D k -D k-1 ) / (L k-1 -L k )) absolute value; wherein the brightness level L of the kth second brightness node DBV2(k) k , greater than the brightness level L of the k+1th second brightness node DBV2(k+1) k+1 ; k is an integer greater than or equal to 2. For example, the ratio (D k+1 -D k ) / (L k -L k+1 ) is different from the ratio (D k -D k-1 ) / (L k-1 -L k For example, the ratio (D k+1 -D k ) / (L k -L k+1 ) is different from the ratio (D k -D k-1 ) / (L k-1 -L k ). For example, Dk is the extinguishing level width of the first pulse of the light emitting control signal under the kth second brightness node in one frame. The brightness level of the kth second brightness node DBV2(k) may correspond to L k .

[0134] Specifically, Figure 6 Shown and Figure 8 In this embodiment, for multiple second brightness nodes DBV2, as the brightness level decreases, the extinction level width of the first pulse of the light control signal changes nonlinearly. When the first brightness node DBV1 is not configured as an SVM improvement node, as the brightness level decreases, the extinction level width of the first pulse of the light control signal should increase linearly. When the extinction level width of the first pulse of the configured first brightness node DBV1 (as an SVM improvement node) decreases, if the extinction level width of the first pulse of each second brightness node is still configured in a manner that the extinction level width of the first pulse of the light control signal changes linearly with the decrease of the brightness level, it is difficult to implement, or, it may result in the situation that the extinction level width of the first pulse of the light control signal under the second brightness node DBV2 within a frame T is greater than the extinction level width of the first pulse of the first brightness node DBV1. The configuration in this embodiment is that the extinction level width of the first pulse of the light-emitting control signal of multiple second brightness nodes DBV2 varies nonlinearly with the brightness level, which is easier to implement. That is, it can reduce the difficulty of implementing the dimming scheme and avoid the extinction level width of the first pulse of the light-emitting control signal under the second brightness node DBV2 within a frame being greater than the extinction level width of the first pulse.

[0135] Optionally, continue to refer to Figure 8 , the difference between the extinguishing level width of the first pulse of the light emitting control signal under the k+1 second brightness node DBV2(k+1) in one frame T and the first pulse of the light emitting control signal under the k second brightness node DBV2(k) in one frame T (for example, D k+1 -D k ), and the difference between the brightness levels of the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1) (e.g., L k -L k+1 ) is greater than (equivalent to nonlinear change) or equal to (equivalent to linear change) the difference in the extinction level width between the first pulse of the light emitting control signal under the kth second brightness node DBV2(k) in one frame T and the first pulse of the light emitting control signal under the k-1th second brightness node DBV2(k-1) in one frame T (for example, D k -D k-1), and the difference between the brightness levels of the k-1th second brightness node DBV2(k-1) and the kth second brightness node DBV2(k) (e.g., L k-1 -L k ). For example, the ratio (D k+1 -D k ) / (L k -L k+1 ) is greater than or equal to the ratio (D k -D k-1 ) / (L k-1 -L k For example, the ratio (D k+1 -D k ) / (L k -L k+1 ) is greater than or equal to the ratio (D k -D k-1 ) / (L k-1 -L k )’s absolute value.

[0136] Specifically, in this embodiment, as the brightness level decreases, the change amount or rate of change of the extinction level width of the first pulse of the light control signal becomes larger and larger, which can be similar to an exponential change trend, so that the brightness change transition as the brightness level decreases can be smoother.

[0137] Optionally, continue to refer to Figure 6The light-emitting control signal under the second brightness node DBV2 includes N second pulse groups P2 in one frame T; the second pulse group P2 includes a third pulse P21 and M fourth pulses P22 located after the third pulse P21; the extinction level width of the third pulse P21 in different second pulse groups P2 in one frame is the same. For example, under the same second brightness node DBV2, the extinction level width of the third pulse P21 in the N second pulse groups P2 is the same, the extinction level width of the fourth pulse P22 in the same second pulse group P2 is the same or different, and the extinction level width of the fourth pulse P22 at the corresponding position in the N second pulse groups P2 is the same, for example, the extinction level width of the first fourth pulse P22 in the 1st to Nth second pulse groups P2 is the same, for example, the extinction level width of the second fourth pulse P22 in the 1st to Nth second pulse groups P2 is the same, for example, the extinction level width of the second fourth pulse P22 in the 1st to Nth second pulse groups P2 is the same, for example, the extinction level width of the M-1th fourth pulse P22 in the 1st to Nth second pulse groups P2 is the same. For example, the extinction level width of the Mth fourth pulse P22 in the 1st to Nth second pulse groups P2 is the same. For example, under the same second brightness node DBV2, the extinction level width of the pulses at corresponding positions in the N second pulse groups P2 is the same, the lighting level width of the pulses at corresponding positions in the N second pulse groups P2 is the same, the lighting level width of the fourth pulses P22 at corresponding positions in the N second pulse groups P2 is the same, the extinction level width of the third pulses P21 at corresponding positions in the N second pulse groups P2 is the same, and the lighting level width of the third pulses P21 at corresponding positions in the N second pulse groups P2 is the same.

[0138] Specifically, in this embodiment, the light emitting control signal under the second brightness node DBV2 is configured so that the extinction level widths of the third pulses in one frame T are the same. That is to say, when the second brightness node DBV2 is configured, not only the extinction level width of the first pulse is reduced, but also the extinction level width of the first pulse in other second pulse groups P2 is reduced, which can improve the SVM index of the display panel and is also easier to implement.

[0139] For example, the extinction level width of the fourth pulse in the same second pulse group in one frame is the same. Optionally, the extinction level width of the fourth pulse in different second pulse groups in one frame is the same; the light emitting control signal under the kth second brightness node in one frame, in the same second pulse group, the extinction level width of the third pulse is T2 k -Δt2 k , the extinguishing level width of the fourth pulse is T2 k +Δt2 k / M;T2 k is the second set value, Δt2 k is the second adjustment value, T2k Greater than zero, Δt2 k Greater than zero; T2 k -Δt2 k Greater than zero. For example, T2 k It is the ratio of the sum of the extinction level widths of the third pulse and the M fourth pulses in the same second pulse group of the light emitting control signal at the kth second brightness node divided by the number of pulses in the second pulse group, that is, the average extinction level width. k It is the ratio of the sum of the extinction level widths of all pulses in one frame of the light control signal at the kth second brightness node divided by the number of pulses, that is, the average extinction level width. The extinction level width of the third pulse is T2 k -Δt2 k , which is equivalent to the extinction level width of the third pulse being smaller than the average extinction level width corresponding to the kth second brightness node by Δt2 k , the extinguishing level width of the fourth pulse is T2 k +Δt2 k / M, which is equivalent to the extinction level width of the fourth pulse being greater than the average extinction level width corresponding to the kth second brightness node by Δt2 k / M, which is equivalent to the difference between the average value of the extinction level width corresponding to the kth second brightness node and the extinction level width of the third pulse (i.e., Δt2 k ) is the difference between the off-level width of the fourth pulse and the average off-level width corresponding to the kth second brightness node (ie, Δt2 k / M) times.

[0140] For example, at least two fourth pulses in the same second pulse group in one frame have different extinction level widths. Figure 6 and Figure 7 , the light emitting control signal under the kth second brightness node DBV2(k) is within one frame T, and in the same second pulse group P2, the extinguishing level width of the third pulse P21 is T2 k -Δt2 k , the total width of the extinguishing level of the M fourth pulses (that is, the sum of the extinguishing level widths of the M fourth pulses) is M*T2 k +Δt2 k -Δt3 k , T2 k is the second set value, Δt2 k is the second adjustment value, Δt3 k is the third adjustment value, T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k Greater than zero. T2 k -Δt2 k Greater than zero. M*T2k +Δt2 k -Δt3 k Greater than zero.

[0141] Optionally, in a frame, the extinction level width of the fourth pulse in the same second pulse group is different from the extinction level width of at least one third pulse.

[0142] For example, at the kth second brightness node DBV2(k), in the same second pulse group P2, the extinction level widths of the M fourth pulses can be the same or different. For example, the extinction level width of the m1 fourth pulses is T2 k +Δt2 k / M, the extinction level width of m2 fourth pulses is T2 k +Δt2 k / M-Δt3 k / m2, m1 is an integer greater than or equal to 1, m2 is an integer greater than or equal to 1, m1+m2=M. For example, M is an integer greater than or equal to 2.

[0143] For example, at the kth second brightness node DBV2(k), in the same second pulse group, the extinguishing level width of v fourth pulses among M fourth pulses is T2 k +Δt2 k / M-Δt3 k / v, v is an integer greater than or equal to 1, and v is less than or equal to M.

[0144] For example, v is an integer greater than or equal to 2. For example, v is equal to 3.

[0145] For example, the Δt3 corresponding to the kth second brightness node k Greater than or equal to Δt3 corresponding to the k+1th second brightness node k+1 .

[0146] Specifically, in this embodiment, N*(M+1)*T2 corresponding to multiple second brightness nodes increases as the brightness level of the second brightness node decreases. For example, N*(M+1)*T2 corresponding to multiple second brightness nodes is linearly related to the brightness level. N*(M+1)*T2 corresponding to multiple second brightness nodes increases linearly as the brightness level of the second brightness node decreases. That is to say, in the related art, the total width of the extinction level of the second brightness node is N*(M+1)*T2, which is related to the brightness of the second brightness node and is linearly related to the brightness level. In other words, the N*(M+1)*T2 corresponding to the k+1th second brightness node DBV2(k+1) k+1 N*(M+1)*T2 corresponding to the kth second brightness node DBV2(k) k The difference (for example, N*(M+1)*T2 k+1-N*(M+1)*T2 k ), and the difference between the brightness levels of the kth second brightness node and the k+1th second brightness node (for example, L k -L k+1 ) is equal to the N*(M+1)*T2 corresponding to the kth second brightness node. k N*(M+1)*T2 corresponding to the k-1th second brightness node k-1 The difference (for example, N*(M+1)*T2 k -N*(M+1)*T2 k-1 ), and the difference between the brightness levels of the k-1th second brightness node and the kth second brightness node (e.g., L k-1 -L k ). For example, the ratio [N*(M+1)*T2 k+1 -N*(M+1)*T2 k ] / (L k -L k+1 ) is equal to the ratio [N*(M+1)*T2 k -N*(M+1)*T2 k-1 ] / (L k-1 -L k ). For example, the ratio [N*(M+1)*T2 k+1 -N*(M+1)*T2 k ] / (L k -L k+1 ) is equal to the ratio [N*(M+1)*T2 k -N*(M+1)*T2 k-1 ] / (L k-1 -L k ).

[0147] T2 k -Δt2 k The subscript k represents the kth second brightness node, and different second brightness nodes correspond to different T2 and Δt2. In this embodiment, the extinction level width of the third pulse P21 is subtracted from the corresponding T2 by Δt2, so that the extinction level width of the third pulse of the light-emitting control signal in one frame increases as the brightness level decreases, thereby improving the brightness inversion problem.

[0148] in addition, Fig. 9 A timing diagram of another display panel dimming method provided by an embodiment of the present invention, Fig. 9 is a timing diagram of two adjacent second brightness nodes and the light control signal at each brightness level between the two adjacent second brightness nodes. Fig. 9For each third brightness node DBV3, a red arrow indicates a pulse with a different extinction level width from the second brightness node DBV2 (3). Since the extinction level width of the third pulse P21 in each second pulse group P2 is smaller than T2 at the second brightness node DBV2, the brightness node between the k-1 second brightness node DBV2 and the k second brightness node DBV2 is calculated by interpolation (i.e. Figure 8 When the light control signal corresponding to the third brightness node DBV3 in the kth second brightness node DBV2 and the brightness level higher than the kth second brightness node DBV2 ( Fig. 9 The third brightness node DBV2 (4)) and the third brightness node ( Fig. 9 The change in the total width of the extinction level of the light control signal corresponding to the third brightness node DBV3(5) is shown as an example. Compared with the change in the total width of the extinction level of the light control signal of the other two adjacent third brightness nodes (such as the third brightness node DBV3(1) and the third brightness node DBV3(2)), the change in the total width of the extinction level of the light control signal is greater. For example, if the increase in the total width of the extinction level of the light control signal between the third brightness node DBV3(1) and the third brightness node DBV3(2) is ΔH, then the increase in the total width of the extinction level of the light control signal corresponding to the kth second brightness node, and the brightness node with a brightness level higher than the kth second brightness node and adjacent to the kth second brightness node (that is, the third brightness node DBV3(5) and the second brightness node DBV2(4)) is N1*ΔH (for example, N1 is an integer greater than or equal to 2, for example, N1 is greater than or equal to N). If it is not revised, there will be a problem of brightness change exceeding the specification. In this embodiment, for each light emitting control signal at the second brightness node DBV2, the total width of the extinguishing level of the M fourth pulses P21 in the same second pulse group P2 is corrected so that Δt3 is subtracted from it. k, so that the total width of the extinction level of the light-emitting control signal under the kth second brightness node DBV2 is smaller than the total width of the extinction level of the light-emitting control signal under the brightness node (i.e., the third brightness node) whose brightness level is greater than the kth second brightness node and adjacent to the kth second brightness node DBV2, thereby improving the problem of brightness variation exceeding the specification; for example, the total width of the extinction level of the light-emitting control signal under the second brightness node DBV2 (4) and the third brightness node DBV3 (5) within one frame is smaller. And the difference in the total width of the extinction level of the light-emitting control signal under the above two brightness nodes (i.e., the kth second brightness node DBV2, and the brightness node whose brightness level is greater than the kth second brightness node and adjacent to the kth second brightness node DBV2) is closer to that of the other two adjacent brightness nodes (such as the two adjacent third brightness nodes between the k-1th second brightness node DBV2 and the kth second brightness node DBV2), thereby making the brightness adjustment smoother.

[0149] Optionally, continue to refer to Figure 6 and Figure 7 In the same second pulse group P2 corresponding to the kth second brightness node, among the M fourth pulses P22, the extinction level width of a fourth pulse P22 (for example, the first fourth pulse P22, the second fourth pulse P22, the third fourth pulse P22 or the Mth fourth pulse P22) is T2 k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M. For example, M is equal to 3.

[0150] For example, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of the third pulse is T2 k -Δt2 k , which is equivalent to the extinction level width of the third pulse being smaller than the average extinction level width corresponding to the kth second brightness node by Δt2 k , the extinguishing level width of at least one fourth pulse is T2 k +Δt2 k / M, which is equivalent to the extinction level width of the fourth pulse being greater than the average extinction level width corresponding to the kth second brightness node by Δt2 k / M, which is equivalent to the difference between the average value of the extinction level width corresponding to the kth second brightness node and the extinction level width of the third pulse (i.e., Δt2 k ) is the difference between the off-level width of the fourth pulse and the average off-level width corresponding to the kth second brightness node (ie, Δt2 k / M) times.

[0151] Specifically, if the brightness variation over-specification solution is not considered, for each second brightness node, the amount Δt2 that the extinction level width of the third pulse P21 in each second pulse group P2 is reduced compared to T2 needs to be evenly compensated to the M fourth pulses P21 in the same second pulse group P2, that is, at this time, the extinction level width of each fourth pulse P22 should be T2 k +Δt2 k / M. To improve the problem of brightness variation exceeding the specification, the total width of the extinction level of the M fourth pulses is reduced by Δt3, specifically, Δt3 is subtracted from one of the fourth pulses P21, and the other fourth pulses P21 remain unchanged. In some other implementations, Δt3 can also be evenly divided, and the extinction level width of each fourth pulse P21 is subtracted by the same amount.

[0152] Optionally, continue to refer to Fig. 9 The display panel includes multiple third brightness nodes DBV3, and at least one (for example, one or more) third brightness node DBV3 is included between two adjacent second brightness nodes DBV2; the light-emitting control signal under the third brightness node DBV3 includes N third pulse groups P3 in one frame; the third pulse group P3 includes a fifth pulse P31 and M sixth pulses P32 located after the fifth pulse P31; N is an integer greater than or equal to 2; the extinction level width of the fifth pulse P31 in different third pulse groups P3 in one frame is the same.

[0153] The light-emitting control signal under the third brightness node DBV3 located between the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1), the extinction level width of the fifth pulse P31 within one frame is the same as the extinction level width of the third pulse P21 within one frame of the light-emitting control signal of the kth second brightness node DBV2(k); wherein, the brightness level of the kth second brightness node DBV2(k) is greater than the brightness level of the k+1th second brightness node DBV2(k+1).

[0154] In this way, it can be avoided that as the brightness level decreases, the extinction level width of the first pulse of the third brightness node DBV3 between the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1) exceeds the extinction level width of the first pulse of the k+1th second brightness node DBV2(k+1).

[0155] Optionally, continue to refer to Fig. 9 , the total width of the extinguishing level of all the sixth pulses in the N third pulse groups P3 is N*(M*T2 k +Δt2k )+i*ΔH–N*Δt3 k(i) , where Δt3 k(i) Greater than or equal to 0 and less than Δt3 k , Δt3 k(i) As i increases, it decreases, or, Δt3 k(i) As i increases, it first decreases and then remains unchanged, ΔH is the fourth adjustment value, and ΔH is greater than 0; wherein the brightness level of the kth second brightness node DBV2(k) is greater than the brightness level of the k+1th second brightness node DBV2(k+1). i is an integer greater than or equal to 1. For example, ΔH is a fixed constant. For example, Δt3 k(i) As i increases, it first decreases and then becomes 0. ΔH can also be a variable value.

[0156] For example, one or more third brightness nodes DBV3 located between the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1) and adjacent to the k+1th second brightness node DBV2(k+1) have a corresponding Δt3 k(i) is equal to 0.

[0157] Specifically, in this embodiment, ΔH is the difference in the total width of the extinguishing level of the light-emitting control signal under two adjacent third brightness nodes DBV3 within one frame when the brightness variation over-specification compensation is not considered. When the brightness variation over-specification compensation is considered, in the M sixth pulses P31 corresponding to each third pulse group P3, a total compensation of Δt3 k(i) Therefore, N third pulse groups P3 compensate N*Δt3 k(i) .like Figure 8 As shown, for ease of explanation, Fig. 9 Only the Δt3 corresponding to the third brightness node is marked k(i) In this embodiment, at multiple third brightness nodes, as the brightness level decreases, Δt3 k(i) The value of gradually decreases, that is, the problem of brightness variation exceeding the specification is gradually compensated at multiple third brightness nodes, and before the next second brightness node arrives, the value of Δt3 is reduced to zero to avoid a large difference in the total pulse width of the extinction level of the next second brightness node, which affects the compensation effect.

[0158] Optionally, continue to refer to Fig. 9, the light-emitting control signal of the i-th third brightness node DBV3 is obtained by shortening the multiple initial sixth pulses of the initial light-emitting control signal by a preset time; wherein the initial light-emitting control signal includes N initial third pulse groups corresponding to the N third pulse groups P3 in one frame; the initial third pulse group includes an initial fifth pulse corresponding to the fifth pulse P31 and M initial sixth pulses corresponding to the M sixth pulses P32; the sum of the corresponding preset times in each initial pulse group is equal to Δt3 corresponding to the third brightness node k(i) ; The initial light-emitting control signals corresponding to the i-th third brightness node DBV3(i) and the i-1-th third brightness node DBV3(i-1) between two adjacent second brightness nodes DBV2 within one frame, and the extinction level width of the b-th initial sixth pulse in the a-th initial third pulse group are different; wherein, when i is not an integer multiple of N, a is the remainder of i / N, and b is the quotient of (i+N) / N; when i is an integer multiple of N, a is N, and b is i / N; i is greater than or equal to 2.

[0159] Specifically, the light emitting control signal of the i-th third brightness node DBV3 may be the initial light emitting control signal minus N*Δt3. k(i) Then, in the light-emitting control signal of the i-th third brightness node DBV3, the total width of the extinguishing level of the M sixth pulses P32 in each third pulse group (that is, the sum of the extinguishing level widths) is reduced by Δt3 compared with the total width of the extinguishing level of the corresponding M initial sixth pulses P32. k(i) In some embodiments, the sixth pulse may be a pulse reduced by Δt3 from the initial sixth pulse. k(i)It can also be obtained after at least two (for example, m2, m2=v) sixth pulses are obtained after each reducing the corresponding preset time / m2 on the basis of the initial sixth pulse. In addition, the initial light-emitting control signal corresponding to the third brightness node DBV3 between two adjacent second brightness nodes DBV2 still satisfies the aforementioned interpolation algorithm. That is to say, the initial light-emitting control signal corresponding to the first third brightness node between the kth second brightness node and the k+1th second brightness node within one frame, the extinction level width of the first initial sixth pulse in the first initial third pulse group, is different from the extinction level width of the first fourth pulse in the first second pulse group of the light-emitting control signal of the kth second brightness node within one frame. The i-th third brightness node between two adjacent second brightness nodes (for example, the k-th second brightness node and the k+1-th second brightness node) has a different extinction level width from the b-th initial sixth pulse in the a-th initial third pulse group of the initial light-emitting control signal corresponding to the i-1-th third brightness node within a frame. More specifically, the i-th third brightness node between two adjacent second brightness nodes (for example, the k-th second brightness node and the k+1-th second brightness node) is ΔH larger than the extinction level width of the b-th initial sixth pulse in the a-th initial third pulse group of the initial light-emitting control signal corresponding to the i-1-th third brightness node within a frame.

[0160] Optionally, among at least a portion of the third brightness nodes DBV3 (e.g., a plurality of third brightness nodes DBV3 between the kth second brightness node and the k+1th second brightness node), the light emitting control signals of two adjacent third brightness nodes DBV3 have N pairs or v*N+1 pairs of positions within one frame, and the extinguishing level widths of the sixth pulses P32 corresponding to the positions are different. v is an integer greater than or equal to 1 and less than or equal to M. Specifically, in this embodiment, a sixth pulse P32 in the third pulse group is shortened by Δt3 based on the initial sixth pulse. k(i) For example, in the same initial third pulse group, when the extinguishing level width of an initial sixth pulse is shortened by Δt3 k(i) When the sixth pulse is obtained by adding ΔH, the light-emitting control signals of two adjacent third brightness nodes DBV3 have N pairs of positions in one frame (that is, there is one pair in each of the N third pulse groups), and the extinguishing level widths of the corresponding sixth pulses P32 are different. When the extinguishing level width of an initial sixth pulse in each of the N-1 initial third pulse groups is shortened by Δt3 k(i) , and shortening the extinguishing level width of an initial sixth pulse in one of the third pulse groups by Δt3 k(i)When another initial sixth pulse is further extinguished by adding ΔH to obtain a different sixth pulse, the extinguishing level widths of the sixth pulses P32 corresponding to N+1 pairs of positions of the light-emitting control signals of two adjacent third brightness nodes DBV3 are different within one frame.

[0161] Optionally, among the multiple third brightness nodes DBV3 located between two adjacent second brightness nodes DBV2, the extinction level width of the first sixth pulse P32 of the first third pulse group P3 of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the second brightness node DBV2 with a larger brightness level. For example, among the multiple third brightness nodes DBV3 located between the kth second brightness node DBV2(k) and the k+1th second brightness node DBV2(k+1), the extinction level width of the first sixth pulse P32 of the first third pulse group P3 of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node DBV2(k). k can be an integer greater than or equal to 1. For example, among the plurality of third brightness nodes DBV3 located between the k-1th second brightness node DBV2(k-1) and the kth second brightness node DBV2(k1), the extinction level width of the first sixth pulse P32 of the first third pulse group P3 of the light emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light emitting control signal under the k-1th second brightness node DBV2(k-1). k may be an integer greater than or equal to 2.

[0162] Optionally, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-th third brightness node (that is, the i-th third brightness node between two adjacent second brightness nodes DBV2) is greater than the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-1-th third brightness node.

[0163] Optionally, when i is greater than or equal to (w-1)*N+1, and less than or equal to w*N, the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-th third brightness node is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-1th third brightness node. Optionally, w is greater than or equal to 2, and less than or equal to M.

[0164] Optionally, among the multiple third brightness nodes DBV3 located between two adjacent second brightness nodes DBV2, the extinction level width of the first sixth pulse P32 of the first third pulse group P3 of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the second brightness node DBV2 with a larger brightness level by ΔH, or, the difference between the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame and the extinction level width of the first fourth pulse of the light-emitting control signal under the second brightness node with a larger brightness level is greater than or equal to ΔH-Δt3. (1) For example, among the multiple third brightness nodes located between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node by ΔH, or the difference between the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame and the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node is greater than or equal to ΔH-Δt3. k(1) . k may be an integer greater than or equal to 1. For example, among the multiple third brightness nodes located between the k-1th second brightness node and the kth second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within a frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the k-1th second brightness node by ΔH, or, the difference between the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within a frame and the extinction level width of the first fourth pulse of the light-emitting control signal under the k-1th second brightness node is greater than or equal to ΔH-Δt3. k-1(1) . k can be an integer greater than or equal to 2.

[0165] And / or, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal under the i-th third brightness node is greater than the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal under the i-1-th third brightness node by ΔH, or the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal under the i-th third brightness node minus the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal under the i-1-th third brightness node is greater than or equal to ΔH+(Δt3 k(i-1)-Δt3 k(i) ), for example, equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ) / v, the light emitting control signals of the ith and i-1th third brightness nodes DBV3 have N pairs or v*N+1 pairs of positions within one frame, and the extinguishing level widths of the sixth pulses P32 corresponding to the positions are different. k can be an integer greater than or equal to 1.

[0166] And / or, when i is greater than or equal to (w-1)*N+1 and less than or equal to w*N, the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-1 third brightness node in one frame. ΔH, or, the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-th third brightness node in one frame minus the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-1 third brightness node in one frame is greater than or equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ), for example, equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ) / v, the light emitting control signals of the i-th and i-1-th third brightness nodes DBV3 have N pairs or v*N+1 pairs of positions within one frame, and the extinguishing level widths of the sixth pulses P32 corresponding to the positions are different; w is greater than or equal to 2, and less than or equal to M. k can be an integer greater than or equal to 1.

[0167] And / or, when i is greater than or equal to w*N+1 and less than or equal to (w+1)*N, the extinction level width of the wth sixth pulse of the iw*Nth third pulse group of the light-emitting control signal under the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the iw*Nth third pulse group of the light-emitting control signal under the i-1th third brightness node in one frame. , Or, the extinction level width of the wth sixth pulse of the iw*Nth third pulse group of the light-emitting control signal under the i-1th third brightness node in one frame minus the extinction level width of the wth sixth pulse of the iw*Nth third pulse group of the light-emitting control signal under the i-1th third brightness node in one frame is greater than or equal to 2ΔH+(Δt3 k(i-1) -Δt3 k(i) ), for example, equal to 2ΔH+(Δt3 k(i-1) -Δt3 k(i) ) / v, w is greater than or equal to M. k can be an integer greater than or equal to 1.

[0168] In summary, in the above implementation, the third brightness node located between the kth second brightness node and the k+1th second brightness node configures the light control signal as follows: the total width of the extinguishing level of the light control signal under the third brightness node within one frame plus the corresponding N*Δt3 k(i) Afterwards, as the brightness level decreases step by step, the following rules apply: the extinction level width of the first sixth pulse in the N third pulse groups increases by ΔH; the extinction level width of the second sixth pulse in the N third pulse groups increases by ΔH; until the extinction level width of the Mth sixth pulse in the N third pulse groups increases by ΔH, and then returns to the extinction level width of the first sixth pulse in the N third pulse groups and increases by ΔH. The total extinction level width of the light-emitting control signal under the third brightness node within one frame plus the corresponding N*Δt3 k(i) Then, consider Δt3 k(i) More specifically, the M sixth pulses P32 in the third pulse group minus Δt3 k(i) Previously, the light control signal at each brightness level satisfied the above rule. In other words, for the third brightness node located between the kth second brightness node and the k+1th second brightness node, from the third brightness node adjacent to the kth second brightness node and with a brightness level lower than the kth second brightness node, the extinction level width of the first sixth pulse P32 in the first third pulse group is first increased, and then as the brightness level decreases step by step, the extinction level width of the first sixth pulse P32 in the second third pulse group is increased, and so on, after the extinction level width of the first sixth pulse P32 in the Nth third pulse group is increased, the next brightness level increases the extinction level width of the second sixth pulse P32 in the first third pulse group, and so on.

[0169] When i is greater than or equal to 1, and less than or equal to N, the light-emitting control signal under the i-th third brightness node between the k-th second brightness node and the k+1-th second brightness node has an extinction level width of the first sixth pulse P32 in the i-th third pulse group in one frame increased by ΔH. When i is greater than or equal to N+1, and less than or equal to 2N, the light-emitting control signal under the i-th third brightness node between the k-th second brightness node and the k+1-th second brightness node has an extinction level width of the first sixth pulse P32 in the N-th third pulse group in one frame increased by ΔH, and the extinction level width of the second sixth pulse P32 in the first iN-th third pulse group increased by ΔH. By analogy, when i is greater than or equal to (w-1)*N+1, and less than or equal to w*N, the light-emitting control signal under the i-th third brightness node between the k-th second brightness node and the k+1-th second brightness node has an extinction level width of the first to w-1-th sixth pulses P32 in the N third pulse groups in one frame increased by ΔH, and the extinction level width of the second sixth pulse P32 in the first i-(w-1)*N third pulse groups increased by ΔH. When i is greater than or equal to M*N+1, and less than or equal to (M+1)*N, the light-emitting control signal under the i-th third brightness node between the k-th second brightness node and the k+1-th second brightness node has an extinction level width of the first sixth pulse P32 in the i third pulse groups in one frame increased by 2ΔH.

[0170] It should also be noted that the values ​​of ΔH corresponding to different second brightness nodes may be the same or different. For example, the ΔH corresponding to multiple third brightness nodes located between the kth second brightness node and the k+1th second brightness node may be different from or the same as the ΔH corresponding to multiple third brightness nodes located between the k-1th second brightness node and the kth second brightness node. This embodiment does not specifically limit this. As the brightness level changes, the changing rule of the light control signal may also be other rules. For example, if the total width of the extinguishing level of adjacent brightness levels needs to be configured to change greatly, multiple pulses may also be configured to change simultaneously to meet the demand.

[0171] For example, the extinction level width of the fourth pulses in the same second pulse group in one frame is the same. For example, the extinction level width of the fourth pulses in different second pulse groups in one frame is the same. Optionally, w is greater than or equal to 2, and less than or equal to M; Optionally, among the multiple third brightness nodes between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node in one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node by ΔH. And / or, when i is greater than or equal to 2, and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-th third brightness node in one frame is greater than the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal under the i-1th third brightness node in one frame. And / or, when i is greater than or equal to (w-1)*N+1 and less than or equal to w*N, the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*N third pulse group of the light-emitting control signal at the i-1 third brightness node in one frame by ΔH, and w is greater than or equal to 2 and less than or equal to M. And / or, when i is greater than or equal to w*N+1 and less than or equal to (w+1)*N, the extinction level width of the wth sixth pulse of the iw*N third pulse group of the light-emitting control signal at the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the iw*N third pulse group of the light-emitting control signal at the i-1 third brightness node in one frame by 2ΔH, and w is greater than or equal to M. This is equivalent to not setting the third adjustment value Δt3 k(i) .

[0172] Optionally, continue to refer to Figure 6 The display panel further includes a plurality of fourth brightness nodes DBV4, the brightness level of the fourth brightness node DBV4 is greater than the brightness level of the second brightness node DBV2; the light emitting control signal under the fourth brightness node DBV4 includes N fourth pulse groups P4 within one frame time, and the fourth pulse group P4 includes M+1 seventh pulses P41. For example, in the same fourth pulse group P4, the extinguishing level widths of the M+1 seventh pulses P41 are equal.

[0173] Specifically, the display panel may include a plurality of brightness intervals, such as a first brightness interval LR1, a second brightness interval LR2, and a third brightness interval LR3, and under the same grayscale (e.g., under the maximum grayscale), the corresponding maximum brightness of the first brightness interval LR1, the second brightness interval LR2, and the third brightness interval LR3 increases in sequence. In the first brightness interval LR1, a first brightness node DBV1 is set; in the second brightness interval LR2, a second brightness node DBV2 and a third brightness node DBV3 are set; in the third brightness interval LR3, a fourth brightness node DBV4 is set. The extinction level width of all pulses in the next frame of the fourth brightness node DBV4 is the same, and the specific extinction level width is configured according to the corresponding brightness.

[0174] In addition, optionally, the extinction level width of the light-emitting control signals under the plurality of fourth brightness nodes DBV4 within one frame is linearly related to the brightness level of the fourth brightness node DBV4. For example, the extinction level width of the light-emitting control signals under the plurality of fourth brightness nodes DBV4 within one frame increases as the brightness level of the fourth brightness node DBV4 decreases. For example, the extinction level width of the light-emitting control signals under the plurality of fourth brightness nodes DBV4 within one frame increases linearly as the brightness level of the fourth brightness node DBV4 decreases.

[0175] Specifically, within the third brightness interval LR3, the brightness level is linearly related to the total width of the extinction level of the fourth brightness node DBV4. That is to say, the ratio of the difference between the total width of the extinction level of the fourth brightness node DBV4 and the difference in brightness level is a fixed value, so that the brightness changes more smoothly during dimming. Since the extinction level widths of the pulses of the light-emitting control signal under the fourth brightness node DBV4 within one frame are the same, the extinction level width of the first pulse is also linearly related to the brightness level. Specifically, the difference between the extinction level width of the light-emitting control signal under the p+1th fourth brightness node DBV4(p+1) within one frame and the extinction level width of the light-emitting control signal under the pth fourth brightness node DBV4(p) within one frame (for example, D4 p+1 -D4 p ), and the difference between the brightness levels of the pth fourth brightness node DBV4(p) and the p+1th fourth brightness node DBV4(p+1) (e.g., L4 p -L4 p+1 ) is equal to the difference between the extinction level width of the light emitting control signal under the pth fourth brightness node DBV4(p) in one frame and the extinction level width of the light emitting control signal under the p-1th fourth brightness node DBV4(p-1) in one frame (for example, D4 p -D4 p-1), and the difference between the brightness levels of the p-1th fourth brightness node DBV4(p-1) and the pth fourth brightness node DBV4(p) (e.g., L4 p-1 -L4 p ) where the brightness level DBV4(p) of the pth fourth brightness node is greater than the brightness level DBV4(p+1) of the p+1th fourth brightness node; p is an integer greater than or equal to 2. For example, the ratio (D4 p+1 -D4 p ) / (L4 p -L4 p+1 ) is equal to the ratio (D4 p -D4 p-1 ) / (L4 p-1 -L4 p For example, the ratio (D4 p+1 -D4 p ) / (L4 p -L4 p+1 ) is equal to the absolute value of the ratio (D4 p -D4 p-1 ) / (L4 p-1 -L4 p )’s absolute value.

[0176] Optionally, in some other implementations, it may also be arranged that in the same fourth pulse group, the extinction level width of the first seventh pulse is greater than or equal to the extinction level widths of the remaining seventh pulses.

[0177] Optionally, Fig.10 A timing diagram of another display panel dimming method provided in an embodiment of the present invention, referring to Fig.10 , the display panel includes a plurality of fifth brightness nodes DBV5, and a plurality of fifth brightness nodes DBV5 are arranged between two adjacent fourth brightness nodes DBV4; the total width of the extinction level of the light-emitting control signals under the plurality of fifth brightness nodes DBV5 between two adjacent fourth brightness nodes DBV4 in one frame is linearly related to the corresponding brightness level. For example, the total width of the extinction level of the light-emitting control signals under the plurality of fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases as the brightness level of the fifth brightness node decreases. For example, the total width of the extinction level of the light-emitting control signals under the plurality of fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases linearly as the brightness level of the fifth brightness node decreases.

[0178] Specifically, among the plurality of fifth brightness nodes between two adjacent fourth brightness nodes, the difference between the extinction level width of the light emitting control signal at the j+1th fifth brightness node in one frame and the extinction level width of the light emitting control signal at the jth fifth brightness node in one frame (for example, D5 j+1 -D5j ), and the difference between the brightness levels of the jth fifth brightness node and the j+1th fifth brightness node (e.g., L5 j -L5 j+1 ) is equal to the difference between the extinction level width of the light emitting control signal at the jth fifth brightness node in one frame and the extinction level width of the light emitting control signal at the j-1th fifth brightness node in one frame (for example, D5 j -D5 j-1 ), and the difference between the brightness levels of the j-1th fifth brightness node and the jth fifth brightness node (e.g., L5 j-1 -L5 j ) where the brightness level of the jth fifth brightness node is greater than the brightness level of the j+1th fifth brightness node; j is an integer greater than or equal to 2. For example, the ratio (D5 j+1 -D5 j ) / (L5 j -L5 j+1 ) is equal to the ratio (D5 j -D5 j-1 ) / (L5 j-1 -L5 j For example, the ratio (D5 j+1 -D5 j ) / (L5 j -L5 j+1 ) is equal to the absolute value of the ratio (D5 j -D5 j-1 ) / (L5 j-1 -L5 j ). The brightness level of the fifth brightness node is the brightness level automatically calculated by the driver chip. The brightness levels of two adjacent fifth brightness nodes are adjacent, and the total width difference of the extinguishing level between any two adjacent fifth brightness nodes is the same. In this way, smooth brightness adjustment can be achieved.

[0179] Optionally, the light-emitting control signal under the fifth brightness node includes N fifth pulse groups P5 within one frame time; the fifth pulse group P5 includes M+1 eighth pulses P51, and the light-emitting control signal of two adjacent fifth brightness nodes DBV5 has only one pair of corresponding eighth pulses P51 with different extinction level widths within one frame.

[0180] For example, among the multiple fifth brightness nodes between two adjacent fourth brightness nodes (for example, the pth fourth brightness node DBV4(p) and the p+1th fourth brightness node DBV4(p+1), where p can be an integer greater than or equal to 1), when j is greater than or equal to 1 and less than or equal to N, the extinction level width of the first eighth pulse of the first j fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level among the two adjacent fourth brightness nodes (for example, the pth fourth brightness node DBV4(p)) by a fifth adjustment value; j is greater than or equal to (q-1)*N+1 and less than or equal to q N, the extinction level width of the first q-1 eighth pulses of the N fifth pulse groups and the first j-(q-1)*N fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level among two adjacent fourth brightness nodes by a fifth adjustment value; q is greater than or equal to 2 and less than or equal to M; the fifth adjustment value is greater than 0; for example, the fifth adjustment value is a fixed constant greater than 0. The fifth adjustment value can also be a variable value.

[0181] Optionally, the light control signals corresponding to the j-th fifth brightness node and the j-1-th fifth brightness node between two adjacent fourth brightness nodes within one frame, and the extinction level width of the b-th eighth pulse in the a-th eighth pulse group are different; wherein, when j is not an integer multiple of N, a is the remainder of j / N, and b is the quotient of (j+N) / N; when j is an integer multiple of N, a is M, and b is j / N; j is greater than or equal to 2.

[0182] Specifically, the light emitting control signal of the fifth brightness node DBV5 between two adjacent fourth brightness nodes DBV4 (e.g., the pth fourth brightness node DBV4(p) and the p+1th fourth brightness node DBV4(p+1)) is configured in the following manner: on the basis of the pth fourth brightness node, as the brightness level decreases step by step, first increase the extinction level width of the first eighth pulse in the N fifth pulse groups; then increase the extinction level width of the second eighth pulse in the N fifth pulse groups; until the extinction level width of the M+1th eighth pulse in the N fifth pulse groups is increased. In other words, Fig. 9 As shown, with the gradual increase of the brightness level, on the basis of the pth fourth brightness node, the extinction level width of the first eighth pulse in the first fifth pulse group is first increased to obtain the first fifth brightness node DBV5(1); then, on the basis of the first fifth brightness node DBV5(1), the extinction level width of the first eighth pulse in the second fifth pulse group is increased to obtain the second fifth brightness node DBV5(2); and so on.

[0183] For example, the fifth adjustment values ​​corresponding to multiple fifth brightness nodes located between the p-th fourth brightness node DBV4(p) and the p+1-th fourth brightness node DBV4(p+1) are different from or the same as the fifth adjustment values ​​corresponding to multiple fifth brightness nodes located between the p-1-th fourth brightness node DBV4(p-1) and the p-th fourth brightness node DBV4(p).

[0184] For example, the ΔH corresponding to multiple third brightness nodes located between two adjacent second brightness nodes (for example, the kth second brightness node and the k+1th second brightness node) is the same as or different from the fifth adjustment value corresponding to multiple fifth brightness nodes between two adjacent fourth brightness nodes (for example, the pth fourth brightness node DBV4(p) and the p+1th fourth brightness node DBV4(p+1)).

[0185] Optionally, Fig.11 A timing diagram of another display panel dimming method provided in an embodiment of the present invention, referring to Fig.11 There are multiple first brightness nodes DBV1, and the brightness levels of the multiple first brightness nodes DBV1 decrease in sequence; the light-emitting control signals under the multiple first brightness nodes (for example, DBV1(1), DBV1(2)) are the same, that is, the extinction level widths of each pulse in a frame are the same. Alternatively, the display panel includes at least one sixth brightness node DBV6, the brightness level of the sixth brightness node is less than the brightness level of the first brightness node, and the light-emitting control signal under the sixth brightness node is the same as the light-emitting control signal under the first brightness node, that is, the extinction level widths of each pulse in a frame are the same.

[0186] Specifically, for a brightness node whose brightness level is lower than the first brightness node with the highest brightness level, its brightness is relatively small. At this time, the waveform of the light emitting control signal can be controlled to remain unchanged, and the brightness can be adjusted by adjusting the data voltage of the pixel circuit.

[0187] Optionally, Fig.12 A schematic diagram of a light emitting control signal generation method according to an embodiment of the present invention is provided. Fig.12 The light emitting control signal for a preset brightness node (e.g., a first brightness node, a second brightness node, etc.) is generated by the following method (wherein the preset brightness node is a brightness node in which the extinction level widths of at least two pulses in one frame are not equal, such as the first brightness node and the second brightness node):

[0188] Firstly, a corresponding preset light emitting control signal is generated;

[0189] generating a preset improvement timing corresponding to a preset brightness node;

[0190] A logic operation is performed on the preset improvement timing and the preset light-emitting control signal to generate a light-emitting control signal at a corresponding preset brightness node.

[0191] Specifically, the preset light-emitting control signal EMx may be generated by a driver chip. The preset improvement timing Sx may be generated by a driver chip, and the preset improvement timing Sx may be a corresponding light-emitting control signal EM obtained by performing a logical AND operation with the preset light-emitting control signal EMx. The preset improvement timing is only used to change the pulse of the light-emitting control signal in the preset light-emitting control signal corresponding to the initialization phase and / or the data writing phase for resetting the control terminal of the driving transistor T1, and is not used to change other pulses (such as black insertion pulses) in the preset light-emitting control signal. In addition, the meaning of the change described in this embodiment can be understood as the change of the light-emitting control signal relative to the preset light-emitting control signal. The preset improvement timing Sx may include N sixth pulse groups, corresponding one-to-one to the N pulse groups of the preset light-emitting control signal EMx, and corresponding one-to-one to the N pulse groups of the light-emitting control signal EM, each sixth pulse group includes 2 extinction level periods (for example, a first extinction level period and a second extinction level period) and a lighting level period, the first extinction level period overlaps with the extinction level period of the first pulse of a pulse group corresponding to the preset light-emitting control signal, and the width of the first extinction level period is smaller than the extinction level width of the first pulse of a pulse group corresponding to the preset light-emitting control signal, and the second extinction level period overlaps with the extinction level periods of the M pulses after the first pulse of a pulse group corresponding to the preset light-emitting control signal.

[0192] For example, the light-emitting control signal EM is the light-emitting control signal at the first brightness node. In the same pulse group, the time interval between the moment when the extinguishing level (e.g., high level) of the preset improvement timing Sx jumps to the lighting level (e.g., low level) and the moment when the extinguishing level (e.g., high level) of the first pulse of the preset light-emitting control signal Ex jumps to the lighting level (e.g., low level) is (1+1 / M)*Δt1, and the extinguishing level width of each pulse in the preset light-emitting control signal Ex is T1+Δt1 / M. For example, the light-emitting control signal EM is the light-emitting control signal at the kth second brightness node. In the same pulse group, the time interval between the moment when the extinguishing level (e.g., high level) of the preset improvement timing Sx jumps to the lighting level (e.g., low level) and the moment when the extinguishing level (e.g., high level) of the first pulse of the preset light-emitting control signal Ex jumps to the lighting level (e.g., low level) is (1+1 / M)*Δt2 k The extinguishing level width of each pulse in the preset light control signal Ex is T2 k +Δt2 k / M.

[0193] In this embodiment, it is only necessary to generate a plurality of preset improvement timings corresponding to each preset brightness node, and the preset improvement timings can be used to calculate the light control signal corresponding to the brightness level between the preset brightness node and the next preset brightness node, which has the advantages of less calculation and easy implementation.

[0194] The present invention also provides a dimming method for a display panel, wherein the display panel comprises a first brightness node and a plurality of second brightness nodes, and the brightness level of the second brightness nodes is greater than the brightness level of the first brightness nodes.

[0195] The dimming method includes: the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is smaller than the extinction level width of the second pulse; the light-emitting control signal under the second brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is smaller than the extinction level width of the first pulse; under multiple second brightness nodes, the extinction level width of the first pulse of the light-emitting control signal in one frame increases as the brightness level decreases.

[0196] Specifically, the first pulse width of the light emitting control signal at the first brightness node in one frame is reduced to improve the SVM index, but a brightness inversion problem may occur at the first brightness node DBV1. Figure 6 As shown, in the present embodiment, the light-emitting control signals at all brightness nodes having a brightness level greater than the first brightness node DBV1 are configured, and the extinction level width of the first pulse in a frame is smaller than the extinction level width of the first pulse, so that as the brightness level decreases, the width of the first pulse of the light-emitting control signal increases in a unidirectional manner, and there is no sudden decrease in the process of increase, thereby avoiding the problem of brightness reversal.

[0197] Optionally, at multiple second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases nonlinearly with the decrease of the brightness level.

[0198] Optionally, the absolute value of the ratio of the difference between the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is different from the absolute value of the ratio of the difference between the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first off-level width of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; k is an integer greater than or equal to 2.

[0199] Optionally, the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node.

[0200] Optionally, the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is greater than zero, Δt1 is greater than zero; and T1-Δt1 is greater than zero.

[0201] Optionally, M is an integer greater than or equal to 2.

[0202] Optionally, M is equal to 3.

[0203] Optionally, the brightness level of the display panel is greater than the light emitting control signal at the brightness node of the first brightness node, and the number of pulses in one frame is the same as the number of pulses in one frame of the light emitting control signal at the first brightness node;

[0204] The brightness level of the display panel is greater than the light emitting control signal at the brightness node of the first brightness node, and the extinguishing level width of the first pulse in a frame is less than the extinguishing level width of the first pulse.

[0205] Optionally, the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness level between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth brightness node is greater than the brightness level of the k+1th second brightness node;

[0206] Optionally, the light emitting control signal at the second brightness node includes N second pulse groups in one frame; the second pulse group includes a third pulse and M fourth pulses located after the third pulse; and the extinction level widths of the third pulses in different second pulse groups in one frame are the same;

[0207] Optionally, the extinction level width of the third pulse in the same second pulse group is smaller than the extinction level width of the fourth pulse;

[0208] Optionally, the light emitting control signal at the kth second brightness node in one frame, in the same second pulse group, the extinguishing level width of the third pulse is T2 k -Δt2 k , the total width of the extinguishing level of M fourth pulses is M*T2 k +Δt2 k -Δt3 k , T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k greater than zero;

[0209] Optionally, N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases linearly as the brightness level of the second brightness node decreases;

[0210] Optionally, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of one fourth pulse in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M.

[0211] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0212] The present invention also provides a driving module, such as Fig.13 As shown, Fig.13 A schematic diagram of the structure of a driving module provided by an embodiment of the present invention. The driving module 80 is used to output a light-emitting control signal. The light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is greater than zero, and Δt1 is greater than zero; the brightness level is greater than the brightness level of the first brightness node, and the light-emitting control signal under the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse.

[0213] Specifically, the driving module includes, for example, a driving chip. The specific working principle of the driving module can refer to the description of the dimming method of the display panel in the embodiment of the present invention, which will not be repeated here. The driving module of this embodiment can improve the brightness inversion problem of the display panel.

[0214] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0215] The present invention also provides a display device, Fig.14 A schematic diagram of a display device according to an embodiment of the present invention is provided. Fig.14 The display device includes a display panel and a driving module, and the driving module is used to output a light-emitting control signal to the display panel, wherein the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is greater than zero, and Δt1 is greater than zero; the brightness level is greater than the brightness level of the first brightness node, and the light-emitting control signal under the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse.

[0216] Specifically, the specific working process of the display device can refer to the description of the dimming method of the display panel of the present invention, which will not be repeated here. The display device can be a mobile phone, a tablet computer, an MP3, an MP4, a smart watch, a smart helmet or other wearable devices. The display device includes a driving module provided by an embodiment of the present invention, and thus has the same beneficial effects, which will not be repeated here. Display devices such as mobile phones and computers usually include a brightness adjustment button, and the user uses the brightness adjustment button to change the input display brightness level (Display Brightness Value, DBV), that is, to switch the brightness node. Under different DBVs, the brightness corresponding to the same grayscale is different. Exemplarily, the larger the DBV, the greater the brightness corresponding to the maximum grayscale. The driving module can be used to output a light-emitting control signal to the input end of the light-emitting control signal generating circuit of the display panel, and the output end of the light-emitting control signal generating circuit outputs a light-emitting control signal with a delay from the light-emitting control signal input at the input end to the pixel circuit. Alternatively, the driving module may include a light-emitting control signal generating circuit. Alternatively, the driving module may include a chip and a light-emitting control signal generating circuit.

[0217] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0218] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0219] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dimming method for a display panel, characterized in that: The display panel includes a first brightness node; the dimming method includes: The light emitting control signal under the first brightness node includes N first pulse groups in one frame, where N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, where M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, where T1 is a first set value, Δt1 is a first adjustment value, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero; The brightness level of the display panel is greater than the brightness level of the first brightness node, and the light emitting control signal under the brightness node adjacent to the first brightness node has an extinction level width of the first pulse in a frame that is smaller than the extinction level width of the first pulse.

2. The dimming method of a display panel according to claim 1, characterized in that: The display panel includes a plurality of second brightness nodes, and the brightness level of the second brightness nodes is greater than the brightness level of the first brightness nodes; The extinction level width of the first pulse of the light emitting control signal at the second brightness node adjacent to the first brightness node in one frame is smaller than the extinction level width of the first pulse; Preferably, at a plurality of the second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases as the brightness level decreases; Preferably, at a plurality of the second brightness nodes, the lighting level width of the first pulse of the light emitting control signal within a frame decreases as the brightness level decreases.

3. The dimming method of a display panel according to claim 2, characterized in that: The absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in one frame and the first pulse of the light-emitting control signal at the kth second brightness node in one frame to the difference in brightness level between the kth second brightness node and the k+1th second brightness node is different from the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in one frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in one frame to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; k is an integer greater than or equal to 2; And / or, the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node.

4. The dimming method of a display panel according to claim 2, characterized in that: The light-emitting control signal at the second brightness node includes N second pulse groups in one frame; the second pulse group includes a third pulse and M fourth pulses located after the third pulse; the extinction level width of the third pulses in different second pulse groups in one frame is the same.

5. The dimming method of a display panel according to claim 4, characterized in that: The extinguishing level width of the fourth pulse in the same second pulse group in one frame is the same, Preferably, the extinction level width of the fourth pulse in different second pulse groups in one frame is the same; the light emitting control signal under the kth second brightness node in one frame, in the same second pulse group, the extinction level width of the third pulse is T2 k -Δt2 k The extinguishing level width of the fourth pulse is T2 k +Δt2 k / M;T2 k is the second set value, Δt2 k is the second adjustment value, T2 k Greater than zero, Δt2 k Greater than zero; T2 k -Δt2 k greater than zero; Preferably, T2 k is the ratio of the sum of the extinguishing level widths of the third pulse and M fourth pulses in the same second pulse group of the light emitting control signal at the kth second brightness node divided by the number of pulses in the second pulse group; Alternatively, the extinction level widths of at least two fourth pulses in the same second pulse group in one frame are different; Preferably, the light emitting control signal at the kth second brightness node in one frame, in the same second pulse group, the extinguishing level width of the third pulse is T2 k -Δt2 k The total width of the extinguishing level of the M fourth pulses is M*T2 k +Δt2 k -Δt3 k , T2 k is the second set value, Δt2 k is the second adjustment value, Δt3 k is the third adjustment value, T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k Greater than zero; T2 k -Δt2 k greater than zero; Preferably, in one frame, the extinction level width of the fourth pulse in the same second pulse group is different from the extinction level width of at least one of the third pulses.

6. The dimming method of a display panel according to claim 5, characterized in that: N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases as the brightness level of the second brightness node decreases; Preferably, N*(M+1)*T2 corresponding to the plurality of second brightness nodes increases linearly as the brightness level of the second brightness node decreases; Preferably, N*(M+1)*T2 corresponding to the k+1th second brightness node k+1 N*(M+1)*T2 corresponding to the kth second brightness node k The absolute value of the ratio of the difference between the brightness levels of the kth second brightness node and the k+1th second brightness node is equal to the corresponding N*(M+1)*T2 under the kth second brightness node. k N*(M+1)*T2 corresponding to the k-1th second brightness node k-1 The absolute value of the ratio of the difference between the brightness levels of the k-1th second brightness node and the kth second brightness node.

7. The dimming method of a display panel according to claim 5, characterized in that: In the same second pulse group corresponding to the kth second brightness node, the extinction level width of one fourth pulse in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M; Preferably, M is an integer greater than or equal to 2; Preferably, M is equal to 3; And / or, Δt3 corresponding to the kth second brightness node k Greater than or equal to Δt3 corresponding to the k+1th second brightness node k+1 ; And / or, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of v fourth pulses in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k / v, v is an integer greater than or equal to 1, and v is less than or equal to M; Preferably, v is an integer greater than or equal to 2; And / or, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of at least one fourth pulse is T2 k +Δt2 k / M.

8. The dimming method of a display panel according to claim 5, characterized in that: The display panel comprises a plurality of third brightness nodes, and at least one third brightness node is arranged between two adjacent second brightness nodes; The light emitting control signal at the third brightness node includes N third pulse groups in one frame; the third pulse group includes a fifth pulse and M sixth pulses located after the fifth pulse; N is an integer greater than or equal to 2; the extinction level widths of the fifth pulses in different third pulse groups in one frame are the same; The light-emitting control signal at the third brightness node located between the kth second brightness node and the k+1th second brightness node has an extinction level width of the fifth pulse within one frame that is the same as the extinction level width of the third pulse of the light-emitting control signal of the kth second brightness node within one frame; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node.

9. The dimming method of a display panel according to claim 5, characterized in that: The display panel comprises a plurality of third brightness nodes, and a plurality of the third brightness nodes are arranged between two adjacent second brightness nodes; The light emitting control signal at the third brightness node includes N third pulse groups in one frame; the third pulse group includes a fifth pulse and M sixth pulses located after the fifth pulse; N is an integer greater than or equal to 2; the extinction level widths of the fifth pulses in different third pulse groups in one frame are the same; The total width of the extinguishing level of all the sixth pulses in the N third pulse groups is N*(M*T2 k +Δt2 k )+i*ΔH–N*Δt3 k(i) , where Δt3 k(i) Greater than or equal to 0 and less than Δt3 k , Δt3 k(i) As i increases, it decreases, or, Δt3 k(i) As i increases, it first decreases and then remains unchanged, ΔH is the fourth adjustment value, and ΔH is greater than 0; wherein the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; i is an integer greater than or equal to 1; Preferably, ΔH is a fixed constant; Preferably, Δt3 k(i) As i increases, it first decreases and then becomes 0; Preferably, one or more of the third brightness nodes located between the kth second brightness node and the k+1th second brightness node and adjacent to the k+1th second brightness node have a corresponding Δt3 k(i) is equal to 0.

10. The dimming method of a display panel according to claim 9, characterized in that: In at least some of the third brightness nodes, the light emitting control signals of two adjacent third brightness nodes have N pairs or v*N+1 pairs of positions within one frame, and the extinction level widths of the sixth pulses corresponding to the positions are different; v is an integer greater than or equal to 1 and less than or equal to M; And / or, among the plurality of the third brightness nodes located between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light emitting control signal under the kth second brightness node; And / or, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-th third brightness node is greater than the extinction level width of the first sixth pulse of the i-th third pulse group in one frame of the light-emitting control signal at the i-1-th third brightness node; And / or, when i is greater than or equal to (w-1)*N+1, and less than or equal to w*N, the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-th third brightness node is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group in one frame of the light-emitting control signal at the i-1th third brightness node; w is greater than or equal to 2, and less than or equal to M; Preferably, among the plurality of the third brightness nodes located between the kth second brightness node and the k+1th second brightness node, the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame is greater than the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node by ΔH, or, the difference between the extinction level width of the first sixth pulse of the first third pulse group of the light-emitting control signal under the first third brightness node within one frame and the extinction level width of the first fourth pulse of the light-emitting control signal under the kth second brightness node is greater than or equal to ΔH-Δt3. k(1) , And / or, when i is greater than or equal to 2 and less than or equal to N, the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal at the i-th third brightness node in one frame is greater than the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal at the i-1-th third brightness node in one frame by ΔH, or the difference between the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal at the i-th third brightness node in one frame and the extinction level width of the first sixth pulse of the i-th third pulse group of the light-emitting control signal at the i-1-th third brightness node in one frame is greater than or equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ); And / or, when i is greater than or equal to (w-1)*N+1 and less than or equal to wN, the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group of the light-emitting control signal at the i-th third brightness node in one frame is greater than the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group of the light-emitting control signal at the i-1th third brightness node in one frame by ΔH, or the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group of the light-emitting control signal at the i-th third brightness node in one frame minus the extinction level width of the wth sixth pulse of the i-(w-1)*Nth third pulse group of the light-emitting control signal at the i-1th third brightness node in one frame is greater than or equal to ΔH+(Δt3 k(i-1) -Δt3 k(i) ); w is greater than or equal to 2, and less than or equal to M.

11. The dimming method of a display panel according to claim 2, characterized in that: The display panel further comprises a plurality of fourth brightness nodes, the brightness level of the fourth brightness nodes being greater than the brightness level of the second brightness nodes; The light emitting control signal at the fourth brightness node includes N fourth pulse groups within one frame time; the fourth pulse group includes M+1 seventh pulses; Preferably, the total width of the extinguishing levels of the light emitting control signals at the plurality of fourth brightness nodes within one frame increases as the brightness level of the fourth brightness node decreases; Preferably, the total width of the extinguishing levels of the light emitting control signals at the plurality of fourth brightness nodes within one frame increases linearly with the decrease of the brightness level of the fourth brightness node; Preferably, the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the p+1th fourth brightness node in one frame and the extinction level width of the light-emitting control signal at the pth fourth brightness node in one frame, to the difference in brightness level between the pth fourth brightness node and the p+1th fourth brightness node, is equal to the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the pth fourth brightness node in one frame and the extinction level width of the light-emitting control signal at the p-1th fourth brightness node in one frame, to the difference in brightness level between the p-1th fourth brightness node and the pth fourth brightness node; wherein, the brightness level of the pth fourth brightness node is greater than the brightness level of the p+1th fourth brightness node; p is an integer greater than or equal to 2; Preferably, in the same fourth pulse group, the extinction level width of the first of the seventh pulses is greater than or equal to the extinction level widths of the remaining seventh pulses.

12. The dimming method of a display panel according to claim 11, characterized in that: The display panel comprises a plurality of fifth brightness nodes, and a plurality of the fifth brightness nodes are arranged between two adjacent fourth brightness nodes; The total width of the extinguishing levels of the light emitting control signals at the plurality of the fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases as the brightness level of the fifth brightness node decreases; Preferably, the total width of the extinguishing levels of the light emitting control signals at the plurality of the fifth brightness nodes between two adjacent fourth brightness nodes in one frame increases linearly with the decrease of the brightness level of the fifth brightness node; Preferably, among the multiple fifth brightness nodes between two adjacent fourth brightness nodes, the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the j+1th fifth brightness node in one frame and the extinction level width of the light-emitting control signal at the jth fifth brightness node in one frame, to the difference in brightness level between the jth fifth brightness node and the j+1th fifth brightness node, is equal to the absolute value of the ratio of the difference between the extinction level width of the light-emitting control signal at the jth fifth brightness node in one frame and the extinction level width of the light-emitting control signal at the j-1th fifth brightness node in one frame, to the difference in brightness level between the j-1th fifth brightness node and the jth fifth brightness node; wherein, the brightness level of the jth fifth brightness node is greater than the brightness level of the j+1th fifth brightness node; j is an integer greater than or equal to 2; Preferably, the light emitting control signal under the fifth brightness node includes N fifth pulse groups within one frame time; the fifth pulse group includes M+1 eighth pulses, and the light emitting control signals of two adjacent fifth brightness nodes have only one pair of eighth pulses corresponding to different positions in one frame. Among the multiple fifth brightness nodes between two adjacent fourth brightness nodes, when j is greater than or equal to 1 and less than or equal to N, the extinction level width of the first eighth pulse of the first j fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level between two adjacent fourth brightness nodes by a fifth adjustment value; when j is greater than or equal to (q-1)*N+1 and less than or equal to qN, the extinction level width of the first q-1 eighth pulses of the N fifth pulse groups and the first j-(q-1)*N fifth pulse groups of the light-emitting control signal under the jth fifth brightness node in one frame is greater than the extinction level width of the seventh pulse of the light-emitting control signal under the fourth brightness node with a larger brightness level between two adjacent fourth brightness nodes by a fifth adjustment value; q is greater than or equal to 2 and less than or equal to M; the fifth adjustment value is greater than 0; Preferably, the fifth adjustment value is a fixed constant greater than 0; Preferably, the light-emitting control signals corresponding to the j-th fifth brightness node and the j-1-th fifth brightness node between two adjacent fourth brightness nodes within one frame, and the extinction level width of the b-th eighth pulse in the a-th eighth pulse group are different; wherein, when j is not an integer multiple of N, a is the remainder of j / N, and b is the quotient of (j+N) / N; when j is an integer multiple of N, a is N, b is j / N, and j is greater than or equal to 2.

13. The dimming method of a display panel according to claim 1, characterized in that: There are multiple first brightness nodes, the brightness levels of the multiple first brightness nodes decrease in sequence, and the light emission control signals under the multiple first brightness nodes are the same; Alternatively, the display panel includes at least one sixth brightness node, The brightness level of the sixth brightness node is lower than the brightness level of the first brightness node, and the light-emitting control signal at the sixth brightness node is the same as the light-emitting control signal at the first brightness node.

14. The dimming method of a display panel according to claim 1, characterized in that: N is an integer greater than or equal to 2; and / or, M is an integer greater than or equal to 2; and / or, at the same grayscale or maximum grayscale, the greater the brightness level of the brightness node, the greater the corresponding brightness; And / or, the display panel comprises a pixel circuit, and a data writing phase of the pixel circuit overlaps with a period of an extinguishing level of a first pulse of a light emitting control signal connected to the pixel circuit within a frame; And / or, T1 is the ratio of the sum of the extinction level widths of the first pulse and M second pulses in the same first pulse group divided by the number of pulses in the first pulse group.

15. A dimming method for a display panel, characterized in that: The display panel includes a first brightness node and a plurality of second brightness nodes, the brightness level of the second brightness nodes is greater than the brightness level of the first brightness node; the dimming method includes: The light emitting control signal at the first brightness node includes N first pulse groups in one frame, where N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, where M is an integer greater than or equal to 1; the extinction level width of the first pulse is smaller than the extinction level width of the second pulse; The light emitting control signal at the second brightness node adjacent to the first brightness node has a first pulse in a frame whose extinguishing level width is smaller than the extinguishing level width of the first pulse; At a plurality of the second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases as the brightness level decreases.

16. The dimming method of a display panel according to claim 15, characterized in that: At a plurality of the second brightness nodes, the extinguishing level width of the first pulse of the light emitting control signal in one frame increases nonlinearly as the brightness level decreases; and / or, the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in one frame and the first pulse of the light-emitting control signal at the kth second brightness node in one frame to the difference in brightness level between the kth second brightness node and the k+1th second brightness node is different from the absolute value of the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in one frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in one frame to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth second brightness node is greater than the brightness level of the k+1th second brightness node; k is an integer greater than or equal to 2; And / or, the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the k+1th second brightness node in a frame and the first pulse of the light-emitting control signal at the kth second brightness node in a frame, to the difference in brightness levels between the kth second brightness node and the k+1th second brightness node, is greater than or equal to the absolute value of the ratio of the difference between the extinction level widths of the first pulse of the light-emitting control signal at the kth second brightness node in a frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in a frame, to the difference in brightness levels between the k-1th second brightness node and the kth second brightness node.

17. The dimming method of a display panel according to claim 15, characterized in that: The extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, and Δt1 is greater than zero; T1-Δt1 is greater than zero, and T1 is the ratio of the sum of the extinction level widths of the first pulse and M second pulses in the same first pulse group divided by the number of pulses in the first pulse group; Preferably, M is an integer greater than or equal to 2; Preferably, M is equal to 3; Preferably, the brightness level of the display panel is greater than the light emitting control signal at the brightness node of the first brightness node, and the number of pulses in one frame is the same as the number of pulses in one frame of the light emitting control signal at the first brightness node; The brightness level of the display panel is greater than the light emitting control signal at the brightness node of the first brightness node, and the extinction level width of the first pulse in a frame is smaller than the extinction level width of the first pulse.

18. The dimming method of a display panel according to claim 17, characterized in that: The ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the k+1th second brightness node in one frame and the first pulse of the light-emitting control signal at the kth second brightness node in one frame to the difference in brightness level between the kth second brightness node and the k+1th second brightness node is greater than or equal to the ratio of the difference between the extinction level width of the first pulse of the light-emitting control signal at the kth second brightness node in one frame and the first pulse of the light-emitting control signal at the k-1th second brightness node in one frame to the difference in brightness level between the k-1th second brightness node and the kth second brightness node; wherein, the brightness level of the kth brightness node is greater than the brightness level of the k+1th second brightness node; Preferably, the light emitting control signal at the second brightness node includes N second pulse groups in one frame; the second pulse group includes a third pulse and M fourth pulses located after the third pulse; the extinction level widths of the third pulses in different second pulse groups in one frame are the same; Preferably, the extinction level width of the third pulse in the same second pulse group is smaller than the extinction level width of the fourth pulse; Preferably, the light emitting control signal at the kth second brightness node in one frame, in the same second pulse group, the extinguishing level width of the third pulse is T2 k -Δt2 k The total width of the extinguishing level of the M fourth pulses is M*T2 k +Δt2 k -Δt3 k , T2 k Greater than zero, Δt2 k Greater than zero, Δt3 k greater than zero; Preferably, N*(M+1)*T2 corresponding to a plurality of the second brightness nodes increases linearly as the brightness level of the second brightness node decreases; Preferably, in the same second pulse group corresponding to the kth second brightness node, the extinction level width of one fourth pulse in the M fourth pulses is T2 k +Δt2 k / M-Δt3 k , the extinguishing level width of the other fourth pulse is T2 k +Δt2 k / M.

19. A driving module, characterized in that: The driving module is used to output a light emitting control signal. Among them, the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero; The brightness level is greater than the brightness level of the first brightness node, and the light control signal under the brightness node adjacent to the first brightness node has an extinction level width of the first pulse in a frame that is smaller than the extinction level width of the first pulse.

20. A display device, characterized in that: It includes a display panel and a driving module, wherein the driving module is used to output a light-emitting control signal to the display panel. Among them, the light-emitting control signal under the first brightness node includes N first pulse groups in one frame, N is an integer greater than or equal to 1; the first pulse group includes 1 first pulse and M second pulses located after the first pulse, M is an integer greater than or equal to 1; the extinction level width of the first pulse is T1-Δt1, and the extinction level width of the second pulse is T1+Δt1 / M; T1 is a first set value, Δt1 is a first adjustment value, T1 is greater than zero, Δt1 is greater than zero; T1-Δt1 is greater than zero; the brightness level is greater than the brightness level of the first brightness node, and the light-emitting control signal under the brightness node adjacent to the first brightness node, the extinction level width of the first pulse in one frame is less than the extinction level width of the first pulse.

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