Dimming method of display device and display device

Abstract

The invention relates to the technical field of display, and discloses a dimming method of a display device and the display device.The dimming method comprises the steps that if the target brightness of the display device is smaller than a first preset dimming brightness threshold value, the display device is in a PWM dimming mode; if the brightness is greater than the second preset dimming brightness threshold, a DC dimming mode is determined; if the brightness is smaller than or equal to the second preset dimming brightness threshold value and larger than or equal to the first preset dimming brightness threshold value, the mode is a transition dimming mode, and the first preset dimming brightness threshold value is smaller than the second preset dimming brightness threshold value; the number of pulses of the light-emitting control signal in the next frame of display picture in the PWM dimming mode is N1; the number of pulses of the light-emitting control signal in the next frame of display picture in the DC dimming mode is N2; the number of pulses of the light-emitting control signal in the next frame of display picture in the transition dimming mode is N3; n3 is larger than N2 and smaller than N1. The display device adopts the dimming method for dimming. The problem of brightness sudden change in the dimming process can be effectively solved, and the display visual effect and the display effect can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a dimming method for a display device and a display device. Background Art

[0002] With the rapid development of display technology, users have higher and higher requirements on the display effect of display devices. In order to evaluate the display effect of a display device, one of the requirements is to evaluate whether the brightness change transition is smooth during the brightness adjustment process.

[0003] At present, OLED (Organic Light-Emitting Diode) screens have become the basic configuration of mid-to-high-end smartphones due to their advantages such as high flexibility, power saving, thin thickness, wide color gamut, and high contrast. When adjusting the brightness of OLED screens, the transition effect of brightness change during brightness adjustment is often poor, that is, sudden brightness changes are prone to occur during the dimming process. And because the human eye has different adaptability to the brightness of the display device under different ambient brightness, sudden brightness changes often cause poor visual effects when users watch.

[0004] Therefore, it is a technical problem that needs to be urgently solved by technical personnel in this field to provide a dimming method and a display device that can effectively improve the problem of sudden brightness changes during the dimming process, avoid instantaneous brightness changes, and help improve display visual effects and display effects. Summary of the invention

[0005] In order to solve the above technical problems, the present disclosure provides a dimming method for a display device and a display device, so as to solve the problem that the display device in the prior art is prone to sudden brightness changes during the dimming process, thereby affecting the display effect and display visual effect.

[0006] The present disclosure provides a dimming method for a display device, the dimming method comprising:

[0007] Obtaining a target brightness of a display device;

[0008] The target brightness is less than a first preset dimming brightness threshold, and the dimming mode of the display device is a PWM dimming mode;

[0009] The target brightness is greater than the second preset dimming brightness threshold, and the dimming mode of the display device is a DC dimming mode; wherein the first preset dimming brightness threshold is less than the second preset dimming brightness threshold;

[0010] The display device includes a light emitting control circuit and a light emitting module, the light emitting control circuit and the light emitting module are electrically connected, and the light emitting control circuit is used to provide a light emitting control signal for the light emitting module;

[0011] The display device further includes a transition dimming mode, the target brightness is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is a transition dimming mode, and the transition dimming mode is executed between the PWM dimming mode and the DC dimming mode;

[0012] In the PWM dimming mode, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N1;

[0013] In the DC dimming mode, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N2;

[0014] In the transition dimming mode, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3; wherein N1, N2, and N3 are all positive integers, and N2<N3<N1.

[0015] Based on the same inventive concept, the present disclosure also provides a display device, which adopts the dimming method of the above-mentioned display device to perform dimming.

[0016] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0017] The dimming mode of the display device provided by the present disclosure is implemented between the PWM dimming mode and the DC dimming mode by adding a transition dimming mode. If the target brightness is less than the first preset dimming brightness threshold, the dimming mode of the display device is the PWM dimming mode, and the number of pulses of the light-emitting control signal in one frame of the display screen controlled by the light-emitting control circuit is N1; if the target brightness is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is the transition dimming mode, and the number of pulses of the light-emitting control signal in one frame of the display screen controlled by the light-emitting control circuit is N3; if the target brightness is greater than the second preset dimming brightness threshold, the dimming mode of the display device is the DC dimming mode, and the number of pulses of the light-emitting control signal in one frame of the display screen controlled by the light-emitting control circuit is N3. The number of pulses of the light-emitting control signal in one frame of display screen is controlled to be N2; N2<N3<N1 is set. In the transition dimming mode, the light-emitting control circuit controls the number of pulses N3 of the light-emitting control signal in one frame of display screen to transition between N1 and N2. By directly adjusting the transition of the number of pulses of the light-emitting control signal in one frame of display screen, the number of pulses of the light-emitting control signal can be set directly and flexibly without being limited to the complicated adjustment of the duty cycle. This can avoid brightness mutations caused by differences in light-emitting current, reduce instantaneous brightness mutations during the dimming process, effectively improve visual effects, ensure the display effect of the display device, and at the same time help simplify the dimming steps, reduce the complexity of the dimming process, and improve the driving performance of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 is a flowchart of a dimming method for a display device provided by an embodiment of the present disclosure;

[0021] Figure 2 Is adopted Figure 1 A structural schematic diagram of a display device with a dimming method;

[0022] Figure 3 It is a timing diagram of a light control signal in a frame of display screen controlled by a light control circuit in different dimming modes in the dimming method provided by an embodiment of the present disclosure;

[0023] Figure 4 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0024] Figure 5 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0025] Figure 6 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0026] Figure 7 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0027] Figure 8 is another flowchart of a dimming method for a display device provided in an embodiment of the present disclosure;

[0028] Fig. 9 is a corresponding setting relationship between a display brightness value and the number of pulses of a light emitting control signal in a transition dimming mode of a display device provided by an embodiment of the present disclosure;

[0029] Fig.10 is another flowchart of a dimming method for a display device provided in an embodiment of the present disclosure;

[0030] Fig.11 It is another corresponding setting relationship between the display brightness value and the pulse number of the light emitting control signal in the transition dimming mode of the display device provided by the embodiment of the present disclosure;

[0031] Fig.12 yes Figure 2 A schematic diagram of the electrical connection structure between the pixel circuit and the light-emitting element;

[0032] Fig.13 Is adopted Figure 1 Another structural schematic diagram of a display device with a dimming method;

[0033] Fig.14 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0034] Fig.15 is a linear relationship diagram between the display brightness value and the number of pulses of the light emitting control signal provided by the embodiment of the present disclosure;

[0035] Fig.16 It is another timing diagram of the light control signal in a frame of display screen controlled by the light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure;

[0036] Fig.17 This is another linear relationship diagram between the display brightness value and the number of pulses of the light emitting control signal provided in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 is a flowchart of a dimming method for a display device provided in an embodiment of the present disclosure, Figure 2 Is adopted Figure 1The present embodiment provides a dimming method for a display device, and the dimming method includes:

[0040] S10: Obtaining a target brightness of the display device;

[0041] S11: the target brightness of the display device is less than a first preset dimming brightness threshold, and the dimming mode of the display device is a PWM dimming mode;

[0042] S12: the target brightness of the display device is greater than a second preset dimming brightness threshold, and the dimming mode of the display device is a DC dimming mode;

[0043] S13: the display device further includes a transition dimming mode, the target brightness of the display device is less than or equal to a second preset dimming brightness threshold, and the target brightness is greater than or equal to a first preset dimming brightness threshold, the dimming mode of the display device is a transition dimming mode, and the transition dimming mode is executed between the PWM dimming mode and the DC dimming mode; wherein the first preset dimming brightness threshold is less than the second preset dimming brightness threshold;

[0044] The display device 000 includes a light emitting control circuit 10 and a light emitting module 20. The light emitting control circuit 10 and the light emitting module 20 are electrically connected. The light emitting control circuit 10 is used to provide a light emitting control signal EM to the light emitting module 20.

[0045] S111: In the PWM dimming mode, the light control circuit controls the number of pulses of the light control signal in one frame of display screen to be N1;

[0046] S121: In the DC dimming mode, the light control circuit controls the number of pulses of the light control signal in one frame of display image to be N2;

[0047] S131: In the transition dimming mode, the light control circuit controls the number of pulses of the light control signal in one frame of display image to be N3; wherein N1, N2, and N3 are all positive integers, and N2<N3<N1.

[0048] Specifically, the dimming method of the display device provided in the present embodiment can be applied to adjust the brightness of an organic light emitting diode display device as much as possible. The dimming modes of the display device include a PWM dimming mode and a DC dimming mode; wherein the PWM dimming mode refers to the use of a pulse width modulation (PWM) dimming method to adjust the brightness of the display device, and the DC dimming mode refers to the use of a direct current (DC) dimming method to adjust the brightness of the display device. Currently, for OLED display devices, the brightness is often adjusted by the PWM dimming mode at low brightness, and the brightness is adjusted by the DC dimming mode at high brightness. As in the dimming method provided in the present embodiment, the target brightness of the display device is first obtained; if the target brightness is less than the first preset dimming brightness threshold, the dimming mode of the display device is the PWM dimming mode, and if the target brightness is greater than the second preset dimming brightness threshold, the dimming mode of the display device is the DC dimming mode.

[0049] When using the low-frequency PWM dimming mode, users with sensitive eyes will clearly feel the flicker, that is, the phenomenon of alternating light and dark bars on the screen. This will not only affect the viewing experience, but also increase the tension of the eye muscles. Even for users with insensitive eyes, even if they cannot see the alternation of light and dark, there is still a certain risk of eye damage. As consumers continue to pursue physical health, in order to reduce screen flicker and achieve eye protection effects, the general PWM dimming mode uses a high-frequency PWM dimming mode. That is, in the dimming method of this embodiment, if the target brightness is less than the first preset dimming brightness threshold, the dimming mode of the display device is a high-frequency PWM dimming mode. In the PWM dimming mode of the display device 000, the light-emitting control circuit 10 controls the number of pulses of the light-emitting control signal EM in one frame (1frame) of the display screen to be N1, such as Figure 3 As shown, Figure 3 1 is a timing diagram of a light control signal in a display frame controlled by a light control circuit in different dimming modes in the dimming method provided by the embodiment of the present disclosure. Figure 2As shown, the display device 000 includes a light-emitting control circuit 10 and a light-emitting module 20, the light-emitting control circuit 10 and the light-emitting module 20 are electrically connected, and the light-emitting control circuit 10 is used to provide a light-emitting control signal EM for the light-emitting module 20; optionally, the light-emitting control circuit 10 can be located in the non-display area NA of the display device 000, and the light-emitting module 20 can be a partial module of the pixel circuit, located in the display area AA of the display device 000; the light-emitting control circuit 10 provides a clock signal, VGH, VGL and other signals to the light-emitting control circuit 10 through a display driver chip such as DDIC, so that the light-emitting control circuit 10 generates a light-emitting control signal EM to the control end of the light-emitting module 20 in the pixel circuit of the display area AA, so as to control the conduction and shutdown of the light-emitting module 20, and then drive the light-emitting element of the display area AA to emit light or not. The structure of the display device 000 is not described in detail in this embodiment, and the structure of the display device in the related art can be specifically understood.

[0050] If the target brightness is greater than the second preset dimming brightness threshold, the dimming mode of the display device is switched to the DC dimming mode, such as Figure 3 As shown, in the DC dimming mode, the number of pulses of the light control signal EM controlled by the light control circuit 10 in one frame of display screen is N2. Optionally, N2 is generally 1 or 2, preferably 1, that is, the number of pulses of the light control signal EM controlled by the light control circuit 10 in one frame of display screen is 1 (1 pulse).

[0051] As the PWM frequency increases, the number of pulses of the light-emitting control signal EM in the PWM dimming mode also increases, while the light-emitting control signal EM in the DC dimming mode is generally 1 pulse or 2 pulses, resulting in a high number of pulses of the light-emitting control signal EM in the PWM dimming mode, while the pulse of the light-emitting control signal EM in the DC dimming mode does not change. As a result, when the dimming mode of the display device is switched from the PWM dimming mode to the DC dimming mode, the light-emitting control circuit 10 controls the light-emitting control signal EM in one frame of the display screen from multi-pulse coupled light-emitting to single-pulse DC light-emitting, and the difference in light-emitting current causes an obvious brightness mutation; and as the number of pulses of the light-emitting control signal EM increases, the brightness mutation is more obvious.

[0052] The light control signal EM provided by the light control circuit 10 is an electrical signal for controlling the light emitting element in the display device, such as an OLED device, to emit light. For the solution in which the light emitting module 20 includes a P-type transistor, the light emitting element emits light when the light control signal EM is pulled low. A frame of display screen may have 1 to N pulses of the light control signal EM, corresponding to 1-N EMpulses. The light emitting current of the light emitting element in the PWM dimming mode is usually smaller than the light emitting current of the light emitting element in the DC dimming mode. Assuming that before the PWM dimming mode is switched to the DC dimming mode, the light control signal EM provided by the light control circuit 10 has N1 EM pulses, and the light control signal EM provided by the DC dimming mode light control circuit 10 has N2 EM pulses such as 1 EMpulse. When the number of EM pulses in the PWM dimming mode is more, that is, the larger the N1 value, the longer the light emitting time, and the smaller the light emitting current of the required light emitting element, when the PWM dimming mode is switched to the DC dimming mode, the brightness mutation is more likely to occur due to the larger current difference.

[0053] In order to solve the above problem, the dimming mode of the display device in this embodiment also includes a transition dimming mode, which is executed between the PWM dimming mode and the DC dimming mode; if the target brightness is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is the transition dimming mode. Figure 3 As shown, in the transition dimming mode of the display device 000, the light control circuit 10 controls the number of pulses of the light control signal EM in one frame of the display screen to be N3, N2<N3<N1, that is, in the transition dimming mode, the light control circuit 10 controls the number of pulses of the light control signal EM in one frame of the display screen to transition between N1 and N2, so that when the display device switches between the PWM dimming mode and the DC dimming mode, a transition dimming mode is added for transition. For example, before the dimming mode of the display device is switched from the PWM dimming mode to the DC dimming mode, the transition dimming mode is first executed, and the light control circuit 10 controls the light control signal EM in one frame of the display screen to first transition from multi-pulse coupled light emission to a transition dimming mode in which the number of pulses of the light control signal EM is N3, and then switches from the transition dimming mode in which the number of pulses of the light control signal EM is N3 to the DC dimming mode in which the number of pulses of the light control signal EM is N2. During the switching process between the PWM dimming mode and the DC dimming mode, the display device adds a transition dimming mode, and the pulse number N3 of the light control signal EM in the transition dimming mode is between the pulse number N1 of the light control signal EM in the PWM dimming mode and the pulse number N2 of the light control signal EM in the DC dimming mode. This can avoid brightness mutations caused by differences in light-emitting current, reduce instantaneous brightness mutations during the dimming process, effectively improve visual effects, and ensure the display effect of the display device.

[0054] In the related art, in order to improve the problem of sudden brightness change during the dimming process of the display device, some methods adjust the duty cycle of the light-emitting control signal, such as adjusting the duty cycle transition of the light-emitting control signal to improve the sudden brightness change; some methods increase the width of the porch area (the porch area is a virtual space when the screen is driven, which does not exist physically, but it participates in the normal driving of the screen) to narrow the brightness gap between the PWM dimming mode and the DC dimming mode, and reduce the sudden brightness change. However, under the premise that the screen refresh frequency is fixed, the increase in the number of porch area rows will lead to a decrease in the charging time of each row of pixels, which will greatly reduce the effective time of a row of pixels, affect the charging time, and further affect the display quality. The adjustment method of improving the sudden brightness change by adjusting the duty cycle transition of the light-emitting control signal is relatively complicated. Existing experiments have found that because the number of light-emitting control signal EMpulses is increasing, adjusting the duty cycle transition of the light-emitting control signal EM to the limit cannot improve the flickering problem caused by the sudden brightness change during switching.

[0055] Therefore, the dimming mode of the display device provided in the present embodiment is executed between the PWM dimming mode and the DC dimming mode by adding a transition dimming mode. If the target brightness is less than the first preset dimming brightness threshold, the dimming mode of the display device is the PWM dimming mode, and the display device 000 is in the PWM dimming mode, and the number of pulses of the light-emitting control signal EM in one frame of the display screen controlled by the light-emitting control circuit 10 is N1; if the target brightness is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is the transition dimming mode, and the display device 000 is in the transition dimming mode, and the number of pulses of the light-emitting control signal EM in one frame of the display screen controlled by the light-emitting control circuit 10 is N3; if the target brightness is greater than the second preset dimming brightness threshold, the dimming mode of the display device is the DC dimming mode, and the display device 000 is in the DC dimming mode. The control circuit 10 controls the number of pulses of the light-emitting control signal EM in one frame of display picture to be N2; N2<N3<N1 is set. In the transition dimming mode, the light-emitting control circuit 10 controls the number of pulses N3 of the light-emitting control signal EM in one frame of display picture to transition between N1 and N2. By directly adjusting the transition of the number of pulses of the light-emitting control signal EM in one frame of display picture, the number of pulses of the light-emitting control signal EM can be directly and flexibly set without being limited to the complicated adjustment of the duty cycle. This can avoid brightness mutations caused by differences in light-emitting current, reduce instantaneous brightness mutations during the dimming process, effectively improve visual effects, ensure the display effect of the display device, and at the same time help simplify the dimming steps, reduce the complexity of the dimming process, and improve the driving performance of the display device.

[0056] It should be noted that, in this embodiment Figure 3In the figure, the number of pulses of the light control signal EM in one frame of display screen of the display device 000 in the PWM dimming mode, the DC dimming mode and the transition dimming mode is only for example. In specific implementation, it is only necessary to satisfy N2<N3<N1 to enable the display device 000 to transition through the transition dimming mode during the switching process between the DC dimming mode and the PWM dimming mode.

[0057] It can be understood that, in the present embodiment, when the display device is in the transition dimming mode, the number of pulses of the light control signal EM in different frames of display pictures may be different or the same. For example, before the display device switches from the PWM dimming mode to the DC dimming mode, the number of pulses of the light control signal EM in different frames of display pictures in the transition dimming mode may gradually decrease; or before the display device switches from the DC dimming mode to the PWM dimming mode, the number of pulses of the light control signal EM in different frames of display pictures in the transition dimming mode may gradually increase, and it is only necessary to satisfy that the number of pulses N3 of the light control signal EM in one frame of display pictures in the transition dimming mode is between N2 and N1.

[0058] Optionally, in this embodiment, if the target brightness of the display device is less than the first preset dimming brightness threshold, the dimming mode of the display device is the PWM dimming mode, and if the target brightness is greater than the second preset dimming brightness threshold, the dimming mode of the display device is the DC dimming mode. This embodiment does not limit the first preset dimming brightness threshold and the second preset dimming brightness threshold. It only needs to satisfy that the first preset dimming brightness threshold is less than the second preset dimming brightness threshold, so that the display device adopts the PWM dimming mode at low brightness and the DC dimming mode at high brightness.

[0059] In some optional embodiments, please refer to Figure 1 , Figure 2 and Figure 4 , Figure 4 It is another timing diagram of the light control circuit controlling the light control signal in a frame of display screen under different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, when the PWM dimming mode is switched to the DC dimming mode, the transition dimming mode includes a plurality of first transition dimming periods;

[0060] During the nth first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n) ;

[0061] During the n+1th first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n+1) ; n is a positive integer;

[0062] The n+1th first transition dimming period is executed after the nth first transition dimming period, N3 (n+1) <N3 (n) .

[0063] Optional, 1≤N3 (n) -N3 (n+1) ≤3.

[0064] This embodiment explains that when the dimming mode of the display device is switched from the PWM dimming mode at low brightness to the DC dimming mode at high brightness, a transition dimming mode is added before the DC dimming mode is executed, and the transition dimming mode includes a plurality of first transition dimming periods, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen in the PWM dimming mode is N1, and the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen in the nth first transition dimming period in the transition dimming mode is N3 (n) During the n+1th first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n+1) , N3 (n+1) <N3 (n) For example, during the first transition dimming period in the transition dimming mode, the number of pulses of the light emitting control signal EM in one frame of the display screen controlled by the light emitting control circuit 10 is N3. (1) During the second first transition dimming period, the number of pulses of the light emitting control signal EM in one frame of display screen controlled by the light emitting control circuit 10 is N3 (2) During the third first transition dimming period, the number of pulses of the light emitting control signal EM in one frame of display screen controlled by the light emitting control circuit 10 is N3 (3) , ..., during the nth first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n) During the n+1th first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n+1) , then N3 (1) >N3 (2) >N3 (3) >……>N3 (n) >N3 (n+1) ... In this embodiment, before the display device switches from the PWM dimming mode to the DC dimming mode, during the first transition dimming periods in the transition dimming mode, the number of pulses of the light emitting control signal EM gradually decreases, and 1≤N3 (n) -N3 (n+1)≤3, during the first transition dimming periods of two adjacent executions, the number of pulses of the light-emitting control signal EM during the latter execution is 1-3 pulses less than the number of pulses of the light-emitting control signal EM during the former execution, so as to gradually transition to the DC dimming mode, thereby avoiding sudden brightness changes caused by the difference in light-emitting current, reducing the instantaneous brightness changes during the dimming process, effectively improving the visual effect, and ensuring the display effect of the display device.

[0065] For further optional information, please refer to Figure 1 , Figure 2 and Figure 5 , Figure 5 1 is another timing diagram of the light control circuit controlling the light control signal in one frame of display screen under different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, during the n-1th first transition dimming period, the light control circuit 10 controls the number of pulses of the light control signal EM in one frame of display screen to be N3. (n-1) Among them, N3 (n) -N3 (n+1) =N3 (n-1) -N3 (n) .

[0066] In this embodiment, before the display device switches from the PWM dimming mode to the DC dimming mode, during the first transition dimming periods in the transition dimming mode, the number of pulses of the light emitting control signal EM gradually decreases, and 1≤N3 (n) -N3 (n+1) =N3 (n-1) -N3 (n) ≤3, during two adjacent first transition dimming periods, the number of pulses of the light emitting control signal EM during the latter first transition dimming period is 1-3 pulses less than the number of pulses of the light emitting control signal EM during the former first transition dimming period, and the number of pulses of the light emitting control signal EM reduced during two adjacent first transition dimming periods can be the same, such as Figure 5 As shown, N3 (n) -N3 (n+1) =N3 (n-1) -N3 (n) =1, by uniformly adjusting the transition of the number of pulses of the light-emitting control signal EM, and gradually transitioning to the DC dimming mode, it can avoid brightness mutations caused by differences in light-emitting current, reduce instantaneous brightness mutations during the dimming process, effectively improve visual effects, ensure the display effect of the display device, and improve the uniformity of display brightness.

[0067] It can be understood that Figure 5The pulse number of the light emitting control signal EM during multiple first transition dimming periods in the transition dimming mode is only illustrated as an example. In specific implementation, the pulse number of the light emitting control signal EM reduced in two adjacent first transition dimming periods can be the same, and can be reduced by 2 pulses or 3 pulses. It is only necessary to satisfy that the pulse number of the light emitting control signal EM reduced in two adjacent first transition dimming periods is the same.

[0068] In some optional embodiments, please refer to Figure 1 , Figure 2 and Figure 6 , Figure 6 It is another timing diagram of the light control circuit controlling the light control signal in a frame of display screen under different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, when the DC dimming mode is switched to the PWM dimming mode, the transition dimming mode includes a plurality of second transition dimming periods;

[0069] During the mth second transition dimming period, the number of pulses of the light control signal controlled by the light control circuit 10 in one frame of display screen is N3 (m) ;

[0070] During the m+1th second transition dimming period, the number of pulses of the light control signal controlled by the light control circuit 10 in one frame of display screen is N3 (m+1) ; m is a positive integer;

[0071] The m+1th second transition dimming period is executed after the mth second transition dimming period, N3 (m+1) >N3 (m) .

[0072] Optional, 1≤N3 (m+1) -N3 (m) ≤3.

[0073] This embodiment explains that when the dimming mode of the display device is switched from the DC dimming mode at high brightness to the PWM dimming mode at low brightness, a transition dimming mode is added before the PWM dimming mode is executed, and the transition dimming mode includes a plurality of second transition dimming periods, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen in the DC dimming mode is N3, and the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen in the mth second transition dimming period in the transition dimming mode is N3 (m) During the m+1th second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (m+1) , N3 (m+1) >N3 (m)For example, during the multiple second transition dimming periods in the transition dimming mode, during the first second transition dimming period, the number of pulses of the light emitting control signal EM in one frame of the display screen controlled by the light emitting control circuit 10 is N3. (1) During the second transition dimming period, the number of pulses of the light emitting control signal EM in one frame of the display screen controlled by the light emitting control circuit 10 is N3 (2) During the third second transition dimming period, the number of pulses of the light emitting control signal EM in one frame of display screen controlled by the light emitting control circuit 10 is N3 (3) , ..., during the mth second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (m) During the m+1th second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (m+1) , then N3 (1) <N3 (2) <N3 (3) <……<N3 (m) <N3 (m+1) ... In this embodiment, before the display device switches from the DC dimming mode to the PWM dimming mode, during the multiple second transition dimming periods in the transition dimming mode, the number of pulses of the light emitting control signal EM gradually increases, and 1≤N3 (m+1) -N3 (m) ≤3, during the second transition dimming periods of two adjacent executions, the number of pulses of the light-emitting control signal EM during the second transition dimming period executed later is 1-3 pulses more than the number of pulses of the light-emitting control signal EM during the second transition dimming period executed earlier, so as to gradually transition to the PWM dimming mode, thereby avoiding sudden brightness changes caused by differences in the light-emitting current, reducing instantaneous sudden brightness changes during the dimming process, effectively improving the visual effect, and ensuring the display effect of the display device.

[0074] For further optional information, please refer to Figure 1 , Figure 2 and Figure 7 , Figure 7 1 is another timing diagram of the light control circuit controlling the light control signal in one frame of display screen in different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, during the m-1 second transition dimming period, the number of pulses of the light control circuit 10 controlling the light control signal in one frame of display screen is N3. (m-1) Among them, N3 (m+1) -N3 (m) =N3 (m) -N3 (m-1) .

[0075] In this embodiment, before the display device switches from the DC dimming mode to the PWM dimming mode, the number of pulses of the light emitting control signal EM gradually increases during the second transition dimming periods in the transition dimming mode, and 1≤N3 (m+1) -N3 (m) =N3 (m) -N3 (m-1) ≤3, during two adjacent second transition dimming periods, the number of pulses of the light emitting control signal EM during the latter second transition dimming period is 1-3 pulses more than the number of pulses of the light emitting control signal EM during the former second transition dimming period, and the number of pulses of the light emitting control signal EM reduced during the two adjacent second transition dimming periods can be the same, such as Figure 7 As shown, N3 (m+1) -N3 (m) =N3 (m) -N3 (m-1) =1, by uniformly adjusting the transition of the number of pulses of the light-emitting control signal EM, and gradually transitioning to the DC dimming mode, it can avoid brightness mutations caused by differences in light-emitting current, reduce instantaneous brightness mutations during the dimming process, effectively improve visual effects, ensure the display effect of the display device, and improve the uniformity of display brightness.

[0076] It can be understood that Figure 7 The pulse number of the light emitting control signal EM during multiple second transition dimming periods in the transition dimming mode is only illustrated as an example. In specific implementation, the number of pulses added to the light emitting control signal EM during two adjacent second transition dimming periods can be the same, and can be increased by 2 pulses or 3 pulses. It is only necessary to satisfy that the number of pulses added to the light emitting control signal EM during two adjacent second transition dimming periods is the same.

[0077] In some optional embodiments, please refer to Figure 1-Figure 5 , Figure 8 , Figure 8 is another flowchart of a dimming method for a display device provided in an embodiment of the present disclosure. The dimming method for a display device provided in this embodiment includes:

[0078] S20: Obtaining a target brightness of the display device;

[0079] S21: the target brightness of the display device is less than a first preset dimming brightness threshold, and the dimming mode of the display device is a PWM dimming mode;

[0080] S211: In the PWM dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display screen to be N1; wherein N1 is a positive integer;

[0081] S22: the target brightness of the display device is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is a transition dimming mode, wherein the first preset dimming brightness threshold is less than the second preset dimming brightness threshold;

[0082] S221: In the transition dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N3; wherein N3 is a positive integer, and N3<N1.

[0083] S222: The transition dimming mode includes a plurality of first transition dimming periods;

[0084] During the nth first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n) ;

[0085] During the n+1th first transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (n+1) ; n is a positive integer;

[0086] The n+1th first transition dimming period is executed after the nth first transition dimming period, N3 (n+1) <N3 (n) ; and 1≤N3 (n) -N3 (n+1) ≤3.

[0087] S223: Obtaining a corresponding relationship between the actual brightness of the display device and the display brightness value DBV of the display device;

[0088] The display brightness value DBV increases from the first display brightness value to the second display brightness value, and the transition dimming mode changes from the nth first transition dimming period to the n+1th first transition dimming period.

[0089] S23: the target brightness of the display device is greater than a second preset dimming brightness threshold, and the dimming mode of the display device is a DC dimming mode;

[0090] S231: In the DC dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N2; wherein N2 is a positive integer, and N2<N3.

[0091] This embodiment explains that when the dimming mode of the display device is switched from the PWM dimming mode at low brightness to the DC dimming mode at high brightness, a transition dimming mode is added before the DC dimming mode is executed, and the transition dimming mode includes multiple first transition dimming periods, and the number of pulses of the light-emitting control signal controlled by the light-emitting control circuit in a frame of the display screen during the nth first transition dimming period changes to the number of pulses of the light-emitting control signal controlled by the light-emitting control circuit in a frame of the display screen during the n+1th first transition dimming period, which can change with the change of the display brightness value DBV. In the process of adjusting the display brightness value DBV (DisplayBrightness Value) from one value to another, the actual brightness value of the display device will also change, and the DBV curve can be used to adjust the brightness of the display device. The DBV curve represents the corresponding relationship between the display brightness value DBV and the actual brightness of the display device corresponding to a certain gray scale. For example, the DBV curve can represent the corresponding relationship between the display brightness value DBV and the actual brightness of the 255 gray scale of the display device. According to the DBV curve, the actual brightness corresponding to a certain grayscale of a display brightness value DBV is obtained. Then, the gamma curve corresponding to the display brightness value DBV can be obtained according to the actual brightness corresponding to the obtained grayscale. The brightness of the display device can be adjusted using the obtained gamma curve, so that the display device can display the brightness corresponding to other grayscales under the display brightness value DBV.

[0092] Therefore, when executing the transition dimming mode, the correspondence between the actual brightness of the display device and the display brightness value DBV of the display device can be obtained, and the display brightness value DBV increases from the first display brightness value to the second display brightness value, that is, the transition dimming mode changes from the nth first transition dimming period to the n+1th first transition dimming period.

[0093] like Fig. 9 As shown, Fig. 9 The corresponding setting relationship between the display brightness value and the pulse number of the light emitting control signal in the transition dimming mode of the display device provided by the embodiment of the present disclosure, in which the actual brightness of the display device and the display brightness value DBV of the display device correspond to each other, and the multiple display brightness values ​​DBV are X1, X2, ..., Xn respectively; when X1 changes to X2, the transition dimming mode changes from the first transition dimming period to the second transition dimming period, and the pulse number of the light emitting control signal changes from N3 to N4. (1) Change to N3 (2) ; X2 changes to X3, then the transition dimming mode changes from the second first transition dimming period to the third first transition dimming period, and the number of pulses of the light control signal changes from N3 (2) Change to N3 (3) , ..., Xn changes to Xn+1 (DBV increases as shown in Fig. 9As shown by the arrow G1 in the middle, the transition dimming mode changes from the nth first transition dimming period to the n+1th first transition dimming period, and the number of pulses of the light emitting control signal changes from N3 to N4. (n) Change to N3 (n+1) That is, when the display brightness value DBV changes, the number of pulses of the light control signal in different first transition dimming periods in the transition dimming mode also changes accordingly, and X1 corresponds to N3 (1) , X2 corresponds to N3 (2) , ..., Xn corresponds to N3 (n) , Xn+1 corresponds to N3 (n+1) .

[0094] When the display device of the present embodiment executes multiple first transition dimming periods of the transition dimming mode, the number of pulses of the light-emitting control signal is gradually reduced in conjunction with the transition of the display brightness value DBV, thereby improving the color brightness flicker problem, and then achieving a sequential dimming effect by corresponding the change in the display brightness value to the change in the number of pulses of the light-emitting control signal, thereby effectively reducing the instantaneous brightness mutation during the dimming process, improving the visual effect, and ensuring the display effect of the display device.

[0095] In some optional embodiments, please refer to Figure 1-Figure 3 , Figure 6-Figure 7 , Fig.10 , Fig.10 is another flowchart of a dimming method for a display device provided in an embodiment of the present disclosure. The dimming method for a display device provided in this embodiment includes:

[0096] S30: Obtaining a target brightness of the display device;

[0097] S31: the target brightness of the display device is greater than a second preset dimming brightness threshold, and the dimming mode of the display device is a DC dimming mode;

[0098] S311: In the DC dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N2; wherein N2 is a positive integer.

[0099] S32: the target brightness of the display device is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is a transition dimming mode, wherein the first preset dimming brightness threshold is less than the second preset dimming brightness threshold;

[0100] S321: In the transition dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N3; wherein N3 is a positive integer, and N3>N2.

[0101] S322: The transition dimming mode includes a plurality of second transition dimming periods;

[0102] During the mth second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (m) ;

[0103] During the m+1th second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3 (m+1) ; m is a positive integer;

[0104] The m+1th second transition dimming period is executed after the mth second transition dimming period, N3 (m+1) >N3 (m) , and 1≤N3 (m+1) -N3 (m) ≤3.

[0105] S323: Obtaining a corresponding relationship between the actual brightness of the display device and the display brightness value DBV of the display device;

[0106] The display brightness value DBV decreases from the third display brightness value to the fourth display brightness value, and the transition dimming mode changes from the mth second transition dimming period to the m+1th second transition dimming period.

[0107] S33: the target brightness of the display device is less than a first preset dimming brightness threshold, and the dimming mode of the display device is a PWM dimming mode;

[0108] S331: In the PWM dimming mode, the light control circuit controls the number of pulses of the light control signal in one frame of display image to be N1; wherein N1 is a positive integer, and N1>N3.

[0109] This embodiment explains that when the dimming mode of the display device is switched from the DC dimming mode at high brightness to the PWM dimming mode at low brightness, a transition dimming mode is added before the PWM dimming mode is executed, and the transition dimming mode includes multiple second transition dimming periods, and the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the mth second transition dimming period changes to the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the m+1th second transition dimming period, which can change with the change of the display brightness value DBV. In the process of adjusting the display brightness value DBV (Display Brightness Value) from one value to another, the actual brightness value of the display device will also change, and the DBV curve can be used to adjust the brightness of the display device. The DBV curve represents the corresponding relationship between the display brightness value DBV and the actual brightness of the display device corresponding to a certain gray scale. For example, the DBV curve can represent the corresponding relationship between the display brightness value DBV and the actual brightness of the 255 gray scale of the display device. According to the DBV curve, the actual brightness corresponding to a certain grayscale of a display brightness value DBV is obtained. Then, the gamma curve corresponding to the display brightness value DBV can be obtained according to the actual brightness corresponding to the obtained grayscale. The brightness of the display device can be adjusted using the obtained gamma curve, so that the display device can display the brightness corresponding to other grayscales under the display brightness value DBV.

[0110] Therefore, when executing the transition dimming mode, the correspondence between the actual brightness of the display device and the display brightness value DBV of the display device can be obtained, and the display brightness value DBV is reduced from the third display brightness value to the fourth display brightness value, that is, the transition dimming mode changes from the mth second transition dimming period to the m+1th second transition dimming period.

[0111] like Fig.11 As shown, Fig.11 Another corresponding setting relationship between the display brightness value and the pulse number of the light emitting control signal in the transition dimming mode of the display device provided by the embodiment of the present disclosure, in which the actual brightness of the display device and the display brightness value DBV of the display device correspond to each other, and the multiple display brightness values ​​DBV are X1, X2, ..., Xn respectively; when X1 changes to X2, the transition dimming mode changes from the first second transition dimming period to the second second transition dimming period, and the pulse number of the light emitting control signal changes from N3 to N4. (1) Change to N3 (2) ; X2 changes to X3, then the transition dimming mode changes from the second transition dimming period to the third second transition dimming period, and the number of pulses of the light control signal changes from N3 (2) Change to N3 (3) , ..., Xn changes to Xn+1 (DBV decreases as shown in Fig.11As shown by the arrow G2 in the middle, the transition dimming mode changes from the mth second transition dimming period to the m+1th second transition dimming period, and the number of pulses of the light emitting control signal changes from N3 to N4. (m) Change to N3 (m+1) That is, when the display brightness value DBV changes, the number of pulses of the light control signal in different first transition dimming periods in the transition dimming mode also changes accordingly, and X1 corresponds to N3 (1) , X2 corresponds to N3 (2) , ..., Xn corresponds to N3 (m) , Xn+1 corresponds to N3 (m+1) .

[0112] When the display device of the present embodiment executes multiple second transition dimming periods of the transition dimming mode, the number of pulses of the light-emitting control signal is gradually increased in conjunction with the transition of the display brightness value DBV, thereby improving the color brightness flicker problem, and then achieving a sequential dimming effect by corresponding the change in the display brightness value to the change in the number of pulses of the light-emitting control signal, thereby effectively reducing the instantaneous brightness mutation during the dimming process, improving the visual effect, and ensuring the display effect of the display device.

[0113] Optionally, in this embodiment, the first preset dimming brightness threshold is less than the second preset dimming brightness threshold, the target brightness of the display device is less than the first preset dimming brightness threshold, and the dimming mode of the display device is the PWM dimming mode; the target brightness of the display device is greater than the second preset dimming brightness threshold, and the dimming mode of the display device is the DC dimming mode; wherein the first preset dimming brightness threshold may be greater than 0nit, and the second preset dimming brightness threshold may be less than or equal to 90nit, that is, the display device adopts the DC dimming mode under high brightness and the PWM dimming mode under low brightness. During actual dimming, the PWM dimming mode can be adopted when the target brightness of the display device is 0-90nit, and the target brightness of the display device is switched to the DC dimming mode when it is above 90nit. Therefore, after adding the transition dimming mode in this embodiment, the first preset dimming brightness threshold can be any brightness greater than 0nit, and the second preset dimming brightness threshold can be any brightness less than or equal to 90nit. If the first preset dimming brightness threshold is 70 nit, and the second preset dimming brightness threshold is 80 nit, and the target brightness of the display device is less than 70 nit, the dimming mode of the display device is the PWM dimming mode; if the target brightness of the display device is greater than 80 nit, the dimming mode of the display device is the DC dimming mode; if the target brightness of the display device is between 70 nit and 80 nit, the dimming mode of the display device is the transition dimming mode.

[0114] Optionally, the first preset dimming brightness threshold can also take a non-zero brightness close to 0nit, such as the first preset dimming brightness threshold is 5nit, and the second preset dimming brightness threshold is 20nit. If the target brightness of the display device is less than 5nit, the dimming mode of the display device is the PWM dimming mode; if the target brightness of the display device is greater than 20nit, the dimming mode of the display device is the DC dimming mode; if the target brightness of the display device is between 5nit and 20nit, the dimming mode of the display device is the transition dimming mode. The dimming mode of the display device tends to adopt the DC dimming mode, and the screen brightness is changed by directly adjusting the voltage or current. The change in brightness is achieved by adjusting the voltage or current. Therefore, the brightness adjustment process is very smooth, which is beneficial to improving the display effect.

[0115] In some optional embodiments, please refer to Figure 1 , Figure 2 and Fig.12 , Fig.12 yes Figure 2 Schematic diagram of the electrical connection structure between the pixel circuit and the light-emitting element, the display device of this embodiment includes a display area AA and a non-display area NA, the display area AA includes a pixel circuit 00 and a light-emitting element 01; the pixel circuit 00 includes a first power supply terminal PVDD, a second power supply terminal PVEE, a driving module 02 and a light-emitting module 20, and the driving module 02, the light-emitting module 20, and the light-emitting element 01 are electrically connected between the first power supply terminal PVDD and the second power supply terminal PVEE;

[0116] The non-display area NA includes a light emitting control circuit 10 , and an output terminal of the light emitting control circuit 10 is electrically connected to a control terminal 20A of the light emitting module 20 .

[0117] This embodiment explains that the display device 000 includes a display area AA and a non-display area NA. The display area AA may include a plurality of sub-pixels of different colors. Each sub-pixel includes an electrically connected pixel circuit 00 and a light-emitting element 01. The pixel circuit 00 includes a first power terminal PVDD, a second power terminal PVEE, a driving module 02 and a light-emitting module 20. The driving module 02, the light-emitting module 20 and the light-emitting element 01 are electrically connected between the first power terminal PVDD and the second power terminal PVEE. The light-emitting module 20 in the pixel circuit 00 is controlled by a light-emitting control circuit 10 located in the non-display area NA outside the display area AA. The light-emitting control circuit 10 provides a light-emitting control signal EM to the control terminal 20A of the light-emitting module 20. The display device 000 provides clock signals, VGH, VGL and other signals to the light control circuit 10 through a display driver chip such as DDIC, so that the light control circuit 10 generates a light control signal EM to the control terminal 20A of the light emitting module 20 in the pixel circuit of the display area AA to control the on and off of the light emitting module 20, thereby forming a conductive path between the first power terminal PVDD, the driver module 02, the light emitting element 01 and the second power terminal PVEE, generating a driving current to drive the light emitting elements 01 of different sub-pixels in the display area AA to emit light, thereby completing the display.

[0118] In this embodiment, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 is different, and the display device 000 provides clock signals, VGH, VGL and other signals to the light emitting control circuit 10 through a display driver chip such as DDIC. Therefore, the light emitting control signal EM provided by the light emitting control circuit 10 can be controlled by the display driver chip to achieve the number of pulses of the light emitting control signal in a frame of display screen controlled by the light emitting control circuit 10 in the transition dimming mode required by the above embodiment is N3. The dimming method of this embodiment does not need to increase the hardware structure of the display device 000, so it can save the production cost. It only needs to be integrated through the control of the display driver chip to adjust the number of pulses of the light emitting control signal EM provided by the light emitting control circuit 10. Therefore, it is beneficial to improve the brightness mutation problem while saving the overall production cost of the display device.

[0119] It should be noted that, in this embodiment Fig.12 The structure of the pixel circuits such as the driving module and the light emitting module is only illustrated in the block diagram. In the specific implementation, the structure of the pixel circuit 00 can be understood by referring to the structure of the OLED display panel in the related art, and this embodiment will not be elaborated on.

[0120] In some optional embodiments, please refer to Figure 1 , Figure 2 , Fig.12 and Fig.13 , Fig.13 Is adopted Figure 1Another structural schematic diagram of a display device with a dimming method, the display device 000 includes a driving chip 30, and the light emitting control circuit 10 is electrically connected to the driving chip 30;

[0121] The driving chip 30 includes a storage module 301 and a processor module 302;

[0122] A plurality of relationship comparison tables are preset, each of which includes a correspondence between a plurality of different display brightness values ​​DBV of the display device and different pulse numbers of the light control signal EM in a frame of display image controlled by the light control circuit 10 in the transition dimming mode;

[0123] The multiple sets of relationship comparison tables are stored in the storage module 301 or the processor module 302 .

[0124] This embodiment explains that the display device 000 may include a driver chip 30, which may be a display driver chip DDIC, and the light-emitting control circuit 10 is electrically connected to the driver chip 30. Optionally, the driver chip 30 may be electrically connected to the binding area of ​​the display panel included in the display device 000 through a flexible circuit board, and the binding area of ​​the display panel may be electrically connected to the light-emitting control circuit 10 through fan-out lines and peripheral wiring, so that the driver chip 30 provides the light-emitting control circuit 10 with clock signals, VGH, VGL and other signals. It is understandable that this embodiment does not elaborate on the arrangement structure of the driver chip 30 on the display device 000 and the specific electrical connection relationship with the light-emitting control circuit 10, and the specific understanding can be referred to the structure of the OLED display device in the relevant technology.

[0125] The driver chip 30 of this embodiment includes a storage module 301 and a processor module 302. The storage module 301 can be a Flash IC, i.e., a Flash memory chip. Especially in applications where a large amount of data needs to be stored, the Flash IC can play a role in storing data. The processor module 302 can be an AP end, i.e., an application processor end, which is a key part for processing and displaying data. That is, the driver part of a general display device 000 must include a storage module 301 and a processor module 302 to store a large amount of driving data for driving the display. In order to realize the different pulse numbers of the light control signal EM in a frame of display screen controlled by the light control circuit 10 during multiple transition dimming periods in the transition dimming mode, the present embodiment may preset multiple groups of relationship comparison tables, each group of relationship comparison tables including the correspondence between multiple different display brightness values ​​DBV of the display device 000 and the different pulse numbers of the light control signal EM in a frame of display screen controlled by the light control circuit 10 in the transition dimming mode. The multiple groups of relationship comparison tables may be stored in the storage module 301 or the processor module 302. The control driving chip 30 adjusts the different pulse numbers of the light control signal EM in different transition dimming periods in real time according to one group of relationship comparison tables, and then controls the output of the light control circuit 10 to realize the transition adjustment of the pulse numbers of the light control signal EM in different transition dimming periods under different transition dimming modes.

[0126] In this embodiment, multiple groups of relationship comparison tables are preset and pre-stored in the storage module 301 or the processor module 302 of the driver chip 30. They can be called in real time when needed, and the hardware structure of the display device 000 does not change. It is only necessary to store the multiple groups of preset relationship comparison tables in the storage module 301 or the processor module 302 in advance when the driver chip 30 is fired. The production cost of the display device 000 will not increase, which is beneficial to saving production costs.

[0127] Optionally, due to the different characteristics of different display devices, it is necessary to preset multiple sets of relationship comparison tables. In actual use, different choices can be made according to different panels. A set of relationship comparison tables is selected to execute the transition dimming mode to achieve the dimming of the display device to achieve the best visual effect and ensure the display quality.

[0128] Optionally, the relationship comparison table includes a plurality of display brightness values ​​DBV, and the plurality of display brightness values ​​DBV are respectively X1, X2, ..., Xn;

[0129] The relationship comparison table also includes the pulse numbers of the plurality of light emitting control signals EM, that is, the pulse numbers. The pulse numbers of the plurality of light emitting control signals EM are N3 and N4, respectively. (1) 、N3 (2) ,……,N3 (n) ; Among them, X1 corresponds to N3(1) , X2 corresponds to N3 (2) , ..., Xn corresponds to N3 (n) .

[0130] This embodiment explains that a plurality of relationship comparison tables are preset and stored in the storage module 301 or the processor module 302 of the driver chip 30. The relationship comparison table may include a plurality of display brightness values ​​DBV, and the plurality of display brightness values ​​DBV are respectively X1, X2, ..., Xn; the relationship comparison table also includes the pulse numbers of the plurality of light emitting control signals EM, i.e., the pulse numbers, and the pulse numbers of the plurality of light emitting control signals EM are respectively N3 (1) 、N3 (2) ,……,N3 (n) ; Among them, X1 corresponds to N3 (1) , X2 corresponds to N3 (2) , ..., Xn corresponds to N3 (n) As shown in Table 1 below, Table 1 is a set of relationship comparison tables exemplified by the embodiment of the present disclosure.

[0131] Table 1:

[0132]

[0133] In Table 1, the first preset dimming brightness threshold is 73.5nit, and the second preset dimming brightness threshold is 75nit. When the target brightness of the display device 000 is less than 73.5nit, the PWM dimming mode is adopted. When the target brightness of the display device 000 is greater than 75nit, the DC dimming mode is adopted. When the target brightness of the display device 000 is between 73.5nit and 75nit, the transition dimming mode is adopted. In the transition dimming mode, the number of pulses of the light emitting control signal EM during the first transition dimming period, i.e., the number of pulses, decreases as the display brightness value DBV increases. As shown in Table 1, X1 of the display brightness value DBV is 1000, and the number of pulses of the light emitting control signal EM during the first transition dimming period is N3. (1) is 36, X2 of the display brightness value DBV is 1001, and the number of pulses of the light emitting control signal EM during the second first transition dimming period is N3 (2) is 33, X3 of the display brightness value DBV is 1002, and the number of pulses of the light emitting control signal EM during the third first transition dimming period is N3 (3)is 30, ..., before switching to the DC dimming mode, the display brightness value DBV is 1011, then the number of pulses of the light control signal EM during the last first transition dimming period is 3, and the number of pulses N2 of the light control signal EM after switching to the DC dimming mode is 1. The relationship comparison table is set in this way, so that the number of pulses of the light control signal EM of the light control circuit 10 can be called to control the transition dimming mode when it is necessary to implement the transition dimming mode. It is flexible and convenient, and can better improve the problem of sudden brightness change when the dimming mode is switched, thereby improving the display quality.

[0134] In some optional embodiments, please refer to Figure 2 , Fig.12 , Fig.13 and Fig.14 , Fig.14 It is another timing diagram of the light control circuit controlling the light control signal in one frame of the display screen under different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, the display device further includes a first automatic interpolation module; optionally, the first automatic interpolation module can be integrated in the driver chip 30 to control the display device 000;

[0135] The plurality of first transition dimming periods include a first first transition dimming period and a last first transition dimming period; during the first first transition dimming period, the number of pulses of the light emitting control signal in one frame of the display screen controlled by the light emitting control circuit 10 is N3 (a) During the last first transition dimming period, the light emitting control circuit 10 controls the number of pulses of the light emitting control signal within a frame display screen to be N3 (b) ;

[0136] The first automatic interpolation module is used to (a) and N3 (b) The light emitting control circuit 10 controls the number of pulses of the light emitting control signal in one frame of display image by automatically interpolating and acquiring other multiple first transition dimming periods.

[0137] Optionally, the interpolation method of the first automatic interpolation module may be: the first automatic interpolation module determines that during the first first transition dimming period, the display brightness value of the display device 000 is Xa, and the number of pulses of the light control signal EM in a frame of the display screen controlled by the light control circuit 10 is N3 according to the linear relationship diagram between the display brightness value DBV and the number of pulses of the light control signal EM. (a) And determine the last first transition dimming period, the display brightness value of the display device 000 is Xb, the light control circuit 10 controls the number of pulses of the light control signal EM within a frame display screen is N3 (b) ; Among them, Fig.15 As shown, Fig.15is a linear relationship diagram of the display brightness value and the number of pulses of the light emitting control signal provided by the embodiment of the present disclosure, wherein the abscissa of the linear relationship diagram is the display brightness value DBV, and the ordinate is the number of pulses of the light emitting control signal EM (EM pulse number);

[0138] The first automatic interpolation module calculates the linear relationship between the horizontal coordinate Xa and the vertical coordinate N3 according to the linear relationship diagram. (a) Determine the first starting point P1, the horizontal coordinate Xb and the vertical coordinate N3 (b) The determined first end point P2 is automatically interpolated to obtain the pulse numbers of the light emitting control signal EM in one frame of display screen controlled by the light emitting control circuit 10 corresponding to different display brightness values ​​DBV during other multiple first transition dimming periods.

[0139] This embodiment explains that before the display device 000 switches from the low-brightness PWM dimming mode to the high-brightness DC dimming mode, a transition dimming mode can be added. The number of pulses of the light-emitting control signal EM during the multiple first transition dimming periods of the transition dimming mode can be determined without the need for a preset display brightness value DBV and a comparison table of the relationship between the number of pulses of the light-emitting control signal EM. Specifically, during the multiple first transition dimming periods, the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the nth first transition dimming period changes to the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the n+1th first transition dimming period, which can change with the change of the display brightness value DBV, but only the number of pulses of the light-emitting control signal EM in a frame of the display screen controlled by the light-emitting control circuit 10 during the first first transition dimming period and the number of pulses of the light-emitting control signal EM in a frame of the display screen controlled by the light-emitting control circuit 10 during the last first transition dimming period need to be determined, and the number of pulses of the light-emitting control signal EM in the remaining first transition dimming periods can be obtained by automatic interpolation. The display device 000 includes a first automatic interpolation module, which can be integrated in the driver chip 30 to control the display device 000; the display brightness value DBV is linearly related to the number of pulses of the light emitting control signal EM, as shown in the linear relationship diagram. Fig.15 As shown, the horizontal axis is the display brightness value DBV, and the vertical axis is the pulse number (EMpulse number) of the light control signal EM. The first automatic interpolation module determines from the linear relationship diagram that during the first transition dimming period, the display brightness value of the display device 000 is Xa, and the number of pulses of the light control signal EM in a frame of display screen controlled by the light control circuit 10 is N3. (a) , the horizontal coordinate Xa and the vertical coordinate N3 (a)Determine the first starting point; the first automatic interpolation module determines the last first transition dimming period according to the linear relationship diagram, the display brightness value of the display device 000 is Xb, and the number of pulses of the light control signal EM in the light control circuit 10 to control a frame of the display screen is N3 (b) , the horizontal coordinate Xb and the vertical coordinate N3 (b) After the first termination point is determined, the number of pulses of the light control signal EM in one frame of the display screen controlled by the light control circuit 10 corresponding to different display brightness values ​​DBV during the other multiple first transition dimming periods can be obtained by automatic interpolation. The dimming method of the transition dimming mode of the present embodiment only needs to preset the number of pulses of the light control signal EM corresponding to the display brightness value DBV at the start of the first transition dimming period and the end of the first transition dimming period, and automatically interpolate the number of pulses of the light control signal EM during the first transition dimming period in the intermediate state through the first automatic interpolation module, without presetting the number of pulses of the light control signal EM during multiple first transition dimming periods in the intermediate state, which is beneficial to saving the driving power consumption of the driving chip, and further beneficial to reducing the overall driving power consumption of the display device.

[0140] It is understandable that this embodiment Fig.15 The linear relationship diagram between the display brightness value DBV and the pulse number of the light control signal EM in the transition dimming mode is only an example, and is only for indicating that in the transition dimming mode added when the display device 000 switches from the PWM dimming mode to the DC dimming mode, during multiple first transition dimming periods, as the display brightness value DBV increases, the light control circuit 10 controls the number of pulses of the light control signal EM in a frame of the display screen to show a decreasing linear relationship. In specific implementation, the above linear relationship diagram can be set according to actual conditions.

[0141] In some optional embodiments, please refer to Figure 2 , Fig.12 , Fig.13 and Fig.16 , Fig.16 It is another timing diagram of the light control circuit controlling the light control signal in one frame of display screen under different dimming modes in the dimming method provided in the embodiment of the present disclosure. In this embodiment, the display device 000 further includes a second automatic interpolation module; optionally, the second automatic interpolation module can be integrated in the driver chip 30 to control the display device 000;

[0142] The plurality of second transition dimming periods include a first second transition dimming period and a last second transition dimming period. During the first second transition dimming period, the number of pulses of the light emitting control signal EM controlled by the light emitting control circuit 10 in one frame of display screen is N3. (c)During the last second transition dimming period, the light emitting control circuit 10 controls the number of pulses of the light emitting control signal EM within a frame display screen to be N3 (d) ;

[0143] The second automatic interpolation module is used to (c) and N3 (d) The light emitting control circuit 10 controls the number of pulses of the light emitting control signal in one frame of display image by automatically interpolating and acquiring other multiple second transition dimming periods.

[0144] Optionally, the interpolation method of the second automatic interpolation module may be: the second automatic interpolation module determines that during the first second transition dimming period, the display brightness value of the display device 000 is Xc, and the number of pulses of the light control signal EM in a frame of the display screen controlled by the light control circuit 10 is N3 according to the linear relationship diagram between the display brightness value DBV and the number of pulses of the light control signal EM. (c) And determine the last second transition dimming period, the display device 000 display brightness value is Xd, the light control circuit 10 controls the number of pulses of the light control signal EM within a frame display screen is N3 (d) ; Among them, Fig.17 As shown, Fig.17 is another linear relationship diagram between the display brightness value and the pulse number of the light emitting control signal provided by the embodiment of the present disclosure, wherein the abscissa of the linear relationship diagram is the display brightness value DBV, and the ordinate is the pulse number (EM pulse number) of the light emitting control signal EM;

[0145] The second automatic interpolation module calculates the linear relationship between the horizontal coordinate Xc and the vertical coordinate N3 according to the linear relationship diagram. (c) The second starting point P3, the horizontal coordinate Xd and the vertical coordinate N3 are determined (d) The determined second end point P4 is automatically interpolated to obtain the pulse numbers of the light emitting control signal EM in one frame of display screen controlled by the light emitting control circuit 10 corresponding to different display brightness values ​​DBV during other multiple second transition dimming periods.

[0146] This embodiment explains that before the display device 000 switches from the high-brightness DC dimming mode to the low-brightness PWM dimming mode, a transition dimming mode can be added. The number of pulses of the light-emitting control signal EM during multiple second transition dimming periods of the transition dimming mode can be determined without the need for a preset display brightness value DBV and a comparison table of the relationship between the number of pulses of the light-emitting control signal EM. Specifically, during multiple second transition dimming periods, the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the mth second transition dimming period changes to the number of pulses of the light-emitting control signal in a frame of the display screen controlled by the light-emitting control circuit during the m+1th second transition dimming period, which can change with the change of the display brightness value DBV, but only the number of pulses of the light-emitting control signal EM in a frame of the display screen controlled by the light-emitting control circuit 10 during the first second transition dimming period and the number of pulses of the light-emitting control signal EM in a frame of the display screen controlled by the light-emitting control circuit 10 during the last second transition dimming period need to be determined, and the number of pulses of the light-emitting control signal EM in the remaining second transition dimming periods can be obtained by automatic interpolation. The display device 000 includes a second automatic interpolation module, which can be integrated in the driver chip 30 to control the display device 000; the display brightness value DBV is linearly related to the number of pulses of the light emitting control signal EM, as shown in the linear relationship diagram. Fig.17 As shown, the horizontal axis is the display brightness value DBV, and the vertical axis is the pulse number (EMpulse number) of the light control signal EM. The second automatic interpolation module determines that during the first second transition dimming period, the display brightness value of the display device 000 is Xc, and the number of pulses of the light control signal EM controlled by the light control circuit 10 in one frame of display screen is N3. (c) , the horizontal coordinate Xc and the vertical coordinate N3 (c) Determine the second starting point; the second automatic interpolation module determines the last second transition dimming period according to the linear relationship diagram, the display brightness value of the display device 000 is Xd, the light control circuit 10 controls the number of pulses of the light control signal EM in one frame of the display screen is N3 (d) , the horizontal coordinate Xd and the vertical coordinate N3 (d)After the second termination point is determined, the number of pulses of the light control signal EM in one frame of the display screen controlled by the light control circuit 10 corresponding to different display brightness values ​​DBV during the other multiple second transition dimming periods can be obtained by automatic interpolation. The dimming method of the transition dimming mode of the present embodiment only needs to preset the number of pulses of the light control signal EM corresponding to the display brightness value DBV at the start of the second transition dimming period and the end of the second transition dimming period, and automatically interpolate the number of pulses of the light control signal EM during the second transition dimming period in the intermediate state through the second automatic interpolation module, without presetting the number of pulses of the light control signal EM during multiple second transition dimming periods in the intermediate state, which is beneficial to saving the driving power consumption of the driving chip, and further beneficial to reducing the overall driving power consumption of the display device.

[0147] It is understandable that this embodiment Fig.17 The linear relationship diagram between the display brightness value DBV and the pulse number of the light control signal EM in the transition dimming mode is only an example, and is only for indicating that in the transition dimming mode added when the display device 000 switches from the DC dimming mode to the PWM dimming mode, during multiple second transition dimming periods, as the display brightness value DBV decreases, the light control circuit 10 controls the number of pulses of the light control signal EM in a frame of the display screen to show an increasing linear relationship. In specific implementation, the above linear relationship diagram can be set according to actual conditions.

[0148] Optional, such as Figure 2 , Fig.12 , Fig.13 and Fig.14 , Fig.16 As shown, in this embodiment, the light control circuit 10 controls the pulse width of the light control signal EM to be the same within one frame of the display screen. That is, in the transition dimming mode provided by this embodiment, during a plurality of different first transition dimming periods and a plurality of different second transition dimming periods, the number of pulses of the light control signal EM is adjusted, and there is no need to adjust the pulse width of the light control signal EM in a transitional manner. The pulse widths of the light control signal EM are all the same, which can make the adjustment method of the transition dimming mode more intuitive and flexible, and the number of pulses of the light control signal EM can be set directly and flexibly without the need for complicated adjustment of the duty cycle, which can effectively improve the visual effect, avoid sudden changes in brightness, and also help simplify the dimming steps and reduce the complexity of the dimming process.

[0149] In some optional embodiments, this embodiment further provides a display device, the display device as described above Figure 2 or Fig.13As shown, the display device adopts the dimming method of any of the above embodiments to dim. It can be understood that the display device provided in this embodiment can be a computer, a television, a car display device or other display device with a display function, and the present invention does not specifically limit this. The display device provided in this embodiment has the beneficial effects of the display device using the above dimming method. For details, please refer to the specific description of the above embodiments, and this embodiment will not be repeated here.

[0150] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0151] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dimming method for a display device, characterized in that: The dimming method comprises: Acquiring a target brightness of the display device; The target brightness is less than a first preset dimming brightness threshold, and the dimming mode of the display device is a PWM dimming mode; The target brightness is greater than a second preset dimming brightness threshold, and the dimming mode of the display device is a DC dimming mode; wherein the first preset dimming brightness threshold is less than the second preset dimming brightness threshold; The display device comprises a light emitting control circuit and a light emitting module, wherein the light emitting control circuit is electrically connected to the light emitting module, and the light emitting control circuit is used to provide a light emitting control signal for the light emitting module; The display device further includes a transition dimming mode, the target brightness is less than or equal to the second preset dimming brightness threshold, and the target brightness is greater than or equal to the first preset dimming brightness threshold, the dimming mode of the display device is a transition dimming mode, and the transition dimming mode is executed between the PWM dimming mode and the DC dimming mode; In the PWM dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N1; In the DC dimming mode, the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image to be N2; In the transition dimming mode, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3; wherein N1, N2, and N3 are all positive integers, and N2<N3<N1.

2. The dimming method of a display device according to claim 1, characterized in that: When the PWM dimming mode is switched to the DC dimming mode, the transition dimming mode includes a plurality of first transition dimming periods; During the nth first transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3 (n) ; During the n+1th first transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3 (n+1) ; n is a positive integer; The n+1th first transition dimming period is executed after the nth first transition dimming period, N3 (n+1) <N3 (n) .

3. The dimming method of a display device according to claim 2, characterized in that: <h2 style=";text-align:left;direction:ltr">1≤N3<h2 style=";text-align:left;direction:ltr"> (n) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (n+1) <h2 style=";text-align:left;direction:ltr"> ≤3.

4. The dimming method of a display device according to claim 2, characterized in that: During the n-1th first transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3 (n-1) ; in, <h2 style=";text-align:left;direction:ltr">N3<h2 style=";text-align:left;direction:ltr"> (n) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (n+1) <h2 style=";text-align:left;direction:ltr"> =N3<h2 style=";text-align:left;direction:ltr"> (n-1) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (n) <h2 style=";text-align:left;direction:ltr"> 。 5. The dimming method of a display device according to claim 1, characterized in that: When the DC dimming mode is switched to the PWM dimming mode, the transition dimming mode includes a plurality of second transition dimming periods; During the mth second transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3 (m) ; During the (m+1)th second transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display image is N3 (m+1) ; m is a positive integer; The m+1th second transition dimming period is executed after the mth second transition dimming period, N3 (m+1) >N3 (m) .

6. The dimming method of a display device according to claim 5, characterized in that: <h2 style=";text-align:left;direction:ltr">1≤N3<h2 style=";text-align:left;direction:ltr"> (m+1) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (m) <h2 style=";text-align:left;direction:ltr"> ≤3.

7. The dimming method of a display device according to claim 5, characterized in that: During the m-1th second transition dimming period, the number of pulses of the light control signal controlled by the light control circuit in one frame of display screen is N3 (m-1) ; in, <h2 style=";text-align:left;direction:ltr">N3<h2 style=";text-align:left;direction:ltr"> (m+1) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (m) <h2 style=";text-align:left;direction:ltr"> =N3<h2 style=";text-align:left;direction:ltr"> (m) <h2 style=";text-align:left;direction:ltr"> -N3<h2 style=";text-align:left;direction:ltr"> (m-1) <h2 style=";text-align:left;direction:ltr"> 。 8. The dimming method of a display device according to claim 1, characterized in that: N2=1; or, N2=2.

9. The dimming method of a display device according to claim 2, characterized in that: Acquire a corresponding relationship between an actual brightness of the display device and a display brightness value of the display device; The display brightness value increases from the first display brightness value to the second display brightness value, and the transition dimming mode changes from the nth first transition dimming period to the n+1th first transition dimming period.

10. The dimming method of a display device according to claim 5, characterized in that: Acquire a corresponding relationship between an actual brightness of the display device and a display brightness value of the display device; The display brightness value decreases from the third display brightness value to the fourth display brightness value, and the transition dimming mode changes from the mth second transition dimming period to the m+1th second transition dimming period.

11. The dimming method of a display device according to claim 1, characterized in that: The first preset dimming brightness threshold is greater than 0 nit, and the second preset dimming brightness threshold is less than or equal to 90 nit.

12. The dimming method of a display device according to claim 1, characterized in that: The display device comprises a display area and a non-display area, the display area comprises a pixel circuit and a light-emitting element; the pixel circuit comprises a first power supply terminal, a second power supply terminal, a driving module and the light-emitting module, the driving module, the light-emitting module and the light-emitting element are electrically connected between the first power supply terminal and the second power supply terminal; The non-display area includes the light emitting control circuit, and an output end of the light emitting control circuit is electrically connected to a control end of the light emitting module.

13. The dimming method of a display device according to claim 1, characterized in that: The display device comprises a driving chip, and the light emitting control circuit is electrically connected to the driving chip; The driving chip includes a storage module and a processor module; Preset a plurality of relationship comparison tables, each of which includes a correspondence between a plurality of different display brightness values ​​of the display device and different numbers of pulses of the light control signal controlled by the light control circuit in one frame of display image in the transition dimming mode; A plurality of groups of the relationship comparison tables are stored in the storage module or the processor module.

14. The dimming method of a display device according to claim 13, characterized in that: The relationship comparison table includes a plurality of display brightness values, and the plurality of display brightness values ​​are respectively X1, X2, ..., Xn; The relationship comparison table also includes the pulse numbers of the plurality of light-emitting control signals, and the pulse numbers of the plurality of light-emitting control signals are respectively N3 (1) 、N3 (2) ,……,N3 (n) ; Among them, X1 corresponds to N3 (1) , X2 corresponds to N3 (2) , ..., Xn corresponds to N3 (n) .

15. The dimming method of a display device according to claim 13, characterized in that: According to the visual effect of the display device, a set of the relationship table is selected to execute the transition dimming mode.

16. The dimming method of a display device according to claim 2, characterized in that: The display device further includes a first automatic interpolation module; The plurality of first transition dimming periods include a first first transition dimming period and a last first transition dimming period; during the first first transition dimming period, the number of pulses of the light emitting control signal controlled by the light emitting control circuit in one frame of display screen is N3 (a) During the last transition dimming period, the number of pulses of the light emitting control signal in a frame of the display screen controlled by the light emitting control circuit is N3 (b) ; The first automatic interpolation module is used to (a) and N3 (b) The light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display image during the other multiple first transition dimming periods are automatically interpolated and acquired.

17. The dimming method of a display device according to claim 16, characterized in that: The first automatic interpolation module determines, according to the linear relationship diagram between the display brightness value and the number of pulses of the light control signal, that during the first first transition dimming period, the display brightness value of the display device is Xa, and the number of pulses of the light control signal in one frame of the display screen controlled by the light control circuit is N3. (a) and determining the last of the first transition dimming period, the display brightness value of the display device is Xb, the number of pulses of the light control signal in a frame of the display screen controlled by the light control circuit is N3 (b) ; Wherein, the horizontal axis of the linear relationship diagram is the display brightness value, and the vertical axis is the number of pulses of the light control signal; The first automatic interpolation module determines the relationship between the horizontal coordinate Xa and the vertical coordinate N3 according to the linear relationship diagram. (a) Determine the first starting point, horizontal coordinate Xb and vertical coordinate N3 (b) The first termination point is determined, and the number of pulses of the light control signal controlled by the light control circuit in one frame of display picture corresponding to different display brightness values ​​during other multiple first transition dimming periods is automatically interpolated.

18. The dimming method of a display device according to claim 5, characterized in that: The display device further comprises a second automatic interpolation module; The plurality of second transition dimming periods include a first second transition dimming period and a last second transition dimming period. During the first second transition dimming period, the number of pulses of the light emitting control signal controlled by the light emitting control circuit in one frame of display screen is N3. (c) During the last second transition dimming period, the number of pulses of the light emitting control signal in the light emitting control circuit controlling a frame of the display screen is N3 (d) ; The second automatic interpolation module is used to (c) and N3 (d) The other plurality of the second transition dimming periods are automatically interpolated and acquired, and the light emitting control circuit controls the number of pulses of the light emitting control signal in one frame of display picture.

19. The dimming method of a display device according to claim 18, characterized in that: The second automatic interpolation module determines, according to the linear relationship diagram between the display brightness value and the number of pulses of the light control signal, that during the first second transition dimming period, the display brightness value of the display device is Xc, and the number of pulses of the light control signal in one frame of the display screen controlled by the light control circuit is N3. (c) and determining the last second transition dimming period, the display brightness value of the display device is Xd, the number of pulses of the light control signal in a frame of the display screen controlled by the light control circuit is N3 (d) ; Wherein, the horizontal axis of the linear relationship diagram is the display brightness value, and the vertical axis is the number of pulses of the light control signal; The second automatic interpolation module calculates the linear relationship between the horizontal coordinate Xc and the vertical coordinate N3 according to the linear relationship diagram. (c) Determine the second starting point, horizontal coordinate Xd and vertical coordinate N3 (d) The determined second termination point is automatically interpolated to obtain the pulse number of the light control signal in one frame of display image controlled by the light control circuit corresponding to different display brightness values ​​during other multiple second transition dimming periods.

20. The dimming method of a display device according to claim 1, characterized in that: The light emitting control circuit controls the light emitting control signal to have the same pulse width within one frame of display picture.

21. A display device, characterized in that: Dimming is performed using the dimming method for a display device as described in any one of claims 1 to 20.

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