WO2020233328A1 - Backlight module and driving method and driving device therefor, and display device - Google Patents

Backlight module and driving method and driving device therefor, and display device Download PDF

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Publication number
WO2020233328A1
WO2020233328A1 PCT/CN2020/086265 CN2020086265W WO2020233328A1 WO 2020233328 A1 WO2020233328 A1 WO 2020233328A1 CN 2020086265 W CN2020086265 W CN 2020086265W WO 2020233328 A1 WO2020233328 A1 WO 2020233328A1
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Prior art keywords
driving
backlight module
frequency
pulse signal
period
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PCT/CN2020/086265
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French (fr)
Chinese (zh)
Inventor
魏雪琴
聂春扬
戴珂
周留刚
王慧
杨昆
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Publication of WO2020233328A1 publication Critical patent/WO2020233328A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a backlight module and its driving method, driving device, and display device.
  • the large-size liquid crystal display device uses backlight dimming technology, and realizes the brightness change of the backlight module by adjusting the duty ratio and frequency of PWM (Pulse Width Modulation) to match the liquid crystal module to achieve a certain display effect.
  • PWM Pulse Width Modulation
  • the liquid crystal module contains a photosensitive conductor material, and the change of the brightness of the backlight module will stimulate the change of the conductor characteristics of the liquid crystal module, which will lead to the difference in the charging effect of the pixels at different times.
  • This may cause the display device to exhibit interference phenomena that vary with the backlight, for example, it may cause problems such as scanning lines on the display device, which greatly affects the display effect.
  • the purpose of the present disclosure is to provide a backlight module, a driving method thereof, a driving device, and a display device, which can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
  • a method for driving a backlight module which includes driving the light source of the backlight module to emit light in each display period; wherein, a method for driving the light source of the backlight module to emit light in any display period include:
  • the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
  • the non-driving period of any display period includes a plurality of non-driving sub-periods; during the non-driving period of the display period, the first driving pulse signal is output to the light source of the backlight module include:
  • the first driving pulse signal is respectively output to the light source of the backlight module.
  • the driving method of the backlight module further includes:
  • the driving method of the backlight module further includes:
  • a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
  • the driving method of the backlight module further includes:
  • the frequency of the first drive pulse signal and the frequency of the second drive pulse signal are determined; wherein the frequency of the first drive pulse signal is greater than the preset frequency; the second The frequency of the driving pulse signal is less than the preset frequency.
  • determining the frequency of the first driving pulse signal and the frequency of the second driving pulse signal includes:
  • f 0 is the preset frequency
  • t 1 is the time length of the non-driving period of the display period
  • t 2 is the time length of the driving period of the display period.
  • the driving method of the backlight module further includes:
  • the frequency of the first driving pulse signal in each non-driving sub-period of the display period and the frequency of the second driving pulse signal are determined; wherein, the first driving The frequency of the pulse signal in any non-driving sub-time period of the display period is greater than the preset frequency, and the frequency of the second driving pulse signal is less than the preset frequency.
  • determining the frequency of the first driving pulse signal in each non-driving sub-period of the display period and the frequency of the second driving pulse signal include:
  • the frequency of the first driving pulse signal in each non-driving sub-time period of the display period and the frequency of the second driving pulse signal satisfy the following relationship:
  • f 0 is the preset frequency
  • f 1i is the frequency of the first driving pulse signal in the i-th non-driving sub-period of the display period
  • f 2 is the frequency of the second driving pulse signal
  • t 1i Is the time length of the i-th non-driving sub-period of the display period
  • t 2 is the time length of the driving period of the display period
  • N is the number of non-driving sub-periods in the display period
  • N is A positive integer not less than 1.
  • a driving device for a backlight module including:
  • the first driving signal circuit is used to output the first driving pulse signal to the light source of the backlight module in the non-driving time period of each display period;
  • the second driving signal circuit is used to output the second driving pulse signal to the light source of the backlight module in the driving time period of each display cycle;
  • the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
  • the non-driving period of any display period includes a plurality of non-driving sub-periods
  • the first driving signal circuit includes a plurality of first driving signal sub-circuits corresponding to the plurality of non-driving sub-periods one-to-one, and any one of the first driving signal sub-circuits is used for outputting in the corresponding non-driving sub-period The first driving pulse signal to the light source of the backlight module.
  • the driving device of the backlight module further includes:
  • the timing acquisition circuit is used to acquire the start time of each display period and send the start time of each display period to the first drive signal circuit and the second drive signal circuit.
  • the start time of the display period is within a non-driving period of the display period
  • the first driving signal circuit is configured to:
  • a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
  • a backlight module including the above-mentioned driving device for the backlight module.
  • a display device including the aforementioned backlight module.
  • the backlight module and its driving method, driving device, and display device provided by the present disclosure can output the first driving pulse signal to the light source of the backlight module during the non-driving period of the display period, and output the first driving pulse signal during the driving period of the display period. 2. Drive the pulse signal to the light source of the backlight module. Since the liquid crystal module does not charge the pixels during the non-driving period of the display period, the high frequency of the first driving pulse signal will not cause poor pixel charging. Since the frequency of the first driving pulse signal is higher, the frequency of the second driving pulse signal can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal can reduce poor pixel charging. Therefore, the backlight module, its driving method, driving device, and display device of the present disclosure can reduce pixel charging failures and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
  • FIG. 1 is a schematic flowchart of a driving method of a backlight module according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram of the display period of the embodiment of the present disclosure.
  • FIG. 3 is a timing diagram of a driving method of a backlight module according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of determining the frequency of a pulse signal in an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a driving device for a backlight module according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a driving device of a backlight module according to an embodiment of the present disclosure.
  • the embodiments of the present disclosure provide a method for driving a backlight module.
  • the method for driving the backlight module includes driving the light source of the backlight module to emit light in each display period; wherein, as shown in FIG. 1, during any display period
  • the method of internally driving the light source of the backlight module to emit light includes:
  • Step S110 output the first driving pulse signal V1 to the light source of the backlight module during the non-driving period of the display period;
  • Step S120 output a second driving pulse signal to the light source of the backlight module during the driving period of the display period;
  • the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
  • the liquid crystal module does not charge the pixels during the non-driving time period of the display period, so the high frequency of the first driving pulse signal will not cause poor pixel charging. Since the frequency of the first driving pulse signal is higher, the frequency of the second driving pulse signal can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal can reduce poor pixel charging. Therefore, the driving method of the backlight module of the present disclosure can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
  • FIG. 2 is a schematic diagram of a display cycle.
  • the display period T in the present disclosure is one frame period of the display device.
  • one display period T includes a driving period T 2 and a non-driving period T 1 .
  • the liquid crystal driving device module sends a drive signal to the pixel, such pixel charging.
  • the non-driving period T 1 the liquid crystal module does not issue a drive signal to the pixel, and therefore the pixel state is maintained unchanged.
  • the non-driving period T 1 when the light emission state of the backlight module is changed, the conductivity of the liquid crystal module partial structure change; but since the liquid crystal driving device module does not issue a drive signal to the pixel , The pixel is not charged, so the state of the pixel will not be affected. Accordingly, the backlight module in the non-driving period T 1 dimming, and will not affect the charging of the pixel, and thus does not affect the liquid crystal display module.
  • the drive period T 2 if the backlight module emission state has changed, the conductivity of the liquid crystal module partial structure changes; the drive means of the liquid crystal module is sending a drive signal to the pixel, the pixel may be charging , So the charging rate of the pixel may change. Therefore, in the driving time period T 2 , if the light-emitting state of the backlight module is adjusted, the pixel charging rate of the liquid crystal module may be different, and the display effect of the liquid crystal module may be affected.
  • the light-emitting state adjustment frequency of the backlight module in the non-driving time period T 1 is increased by the first driving pulse signal, so the frequency of the second driving pulse signal can be reduced, thereby reducing the liquid crystal
  • the module adjusts the frequency of the light-emitting state during the driving time period T 2 to reduce the difference in the pixel charging rate of the liquid crystal module, thereby improving the display effect of the liquid crystal module.
  • a display cycle T is any non-driving period T. 1 may include a plurality of non-driven sub-periods.
  • the non-driving period T 1 may include a first non-driven sub-period T 11 and the second non-sub-driving period T 12, wherein the first non-driving The start time of the sub-time period T 11 is the start time of the display period T, and the end time of the second non-driving sub period T 12 is the end time of the display period T.
  • the driving time period T 2 of the display period T is the driving time period T 2 of the display period T.
  • the first driving pulse signal V 1 may be output to the light source of the backlight module in one or more non-driving sub-periods, that is, the first driving pulse may not be output in some non-driving sub-periods
  • the signal V 1 is sent to the light source of the backlight module to simplify the driving method of the backlight module.
  • the first driving pulse signal V 1 in each non-driving sub-period of the display period T, is output to the light source of the backlight module, that is, during each non-driving sub-period of the display period T, The first driving pulse signal V 1 is output to the light source of the backlight module in the driving sub-time period.
  • the proportion of the first driving pulse signal V 1 can be increased as much as possible, and the frequency of the second driving pulse signal V 2 can be further reduced, thereby further improving the display effect of the liquid crystal module.
  • the non-driving time period may be arranged in the signal blanking area before the STV frame rate signal is given, for example.
  • the Blanking area there is no pixel charging in the full screen area, even if the display device is affected by changes in light, there will be no difference in charging rate.
  • the driving method of the backlight module provided in the present disclosure may further include determining the frequency of the first driving pulse signal and the frequency of the second driving pulse signal.
  • the frequency of the pulse signal can be determined by the following method:
  • Step S210 obtaining a preset frequency
  • Step S220 Determine the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency; wherein the frequency of the first driving pulse signal V 1 is greater than the preset frequency; the second driving pulse signal The frequency of V 2 is less than the preset frequency.
  • determining the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency can effectively ensure the light-emitting effect of the backlight module, so that the backlight module can provide stable, Properly backlit.
  • f 0 is the preset frequency
  • t 1 is the time length of the non-driving time period T 1 of the display period T
  • t 2 is the time length of the driving time period T 2 of the display period T.
  • a first drive pulse frequency f 1 of the signal V 1 can be kept constant to simplify the driving method of the backlight module.
  • the frequency of the first driving pulse signal V 1 in each non-driving sub-period of the display period T and the frequency of the second driving pulse signal V 2 may be determined according to the preset frequency f 0 ;
  • the frequency of the first driving pulse signal V 1 in any non-driving sub-time period of the display period T is greater than the preset frequency, and the frequency of the second driving pulse signal V 2 is less than the preset frequency.
  • the frequency of the first driving pulse signal V 1 can be different, so that the backlight module can use the non-driving sub-periods for dimming more fully and flexibly, and further reduce the driving time.
  • the brightness adjustment of the light source in the segment T 2 further improves the display effect of the liquid crystal module.
  • the frequency of the first driving pulse signal V 1 in each non-driving sub-period of the display period T and the frequency of the second driving pulse signal V 2 may satisfy the following relationship:
  • f 0 is the preset frequency
  • f 1i is the frequency of the first driving pulse signal V 1 in the i-th non-driving sub-period of the display period T
  • f 2 is the frequency of the second driving pulse signal V 2
  • t 1i is the time length of the i-th non-driving sub-period of the display period T
  • t 2 is the time length of the driving period T 2 of the display period T
  • N is the number of non-driving sub-periods in the display period T
  • N is a positive integer not less than 1.
  • the first driving pulse signal V 1 and the second driving pulse signal V 2 may be PWM (pulse width modulation) signals.
  • the first driving pulse signal V 1 and the second driving pulse signal V 2 are at a high level and are used to drive the light source of the backlight module to emit light. Between high-level signals, it can be low-level signals, and low-level signals cannot drive the light source of the backlight module to emit light.
  • the driving method of the backlight module provided in the present disclosure may further include acquiring the start time of each display period T. As shown in Figure 2, since the start time of the last display period T and the end time of the next display period T are the same time, the start time of each display period T can be obtained by obtaining the start time of each display period T. Start time and end time.
  • the driving method of the backlight module of the present disclosure it is possible to ensure the stability and accuracy of the driving time period T 2 and the non-driving time period T 1 in each display period T, and avoid long-term accumulation of errors that cause the driving time period T 2
  • the judgment deviation from the non-driving time period T 1 avoids outputting the first driving pulse signal V 1 of higher frequency to the light source during the driving time period T 2 of the display period T.
  • the driving method of the backlight module provided by the present disclosure may further include: in any two adjacent display periods T, outputting a high level to the light source at the beginning of one display period T, and at the beginning of another display period T Output low level to the light source at the beginning. In this way, it is possible to weaken the accumulated superposition of a high and low level transition for a long time, and further improve the stability of the display of the liquid crystal module.
  • the embodiment of the present disclosure also provides a driving device for the backlight module, which is used to drive the light source 200 of the backlight module to emit light in each display period T.
  • the driving device of the backlight module of the present disclosure includes a first driving signal circuit 101 and a second driving signal circuit 102, wherein,
  • the first driving signal circuit 101 is used for outputting the first driving pulse signal V 1 to the light source 200 of the backlight module during the non-driving time period T 1 of each display period T; the second driving signal circuit 102 is used for each display period
  • the driving period T 2 of T outputs the second driving pulse signal V 2 to the light source 200 of the backlight module; wherein the frequency of the first driving pulse signal V 1 is greater than the frequency of the second driving pulse signal V 2 .
  • the liquid crystal module does not charge the pixels during the non-driving time period T 1 of the display period T. Therefore, the high frequency of the first driving pulse signal V 1 will not cause poor pixel charging. Since the frequency of the first driving pulse signal V 1 is higher, the frequency of the second driving pulse signal V 2 can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal V 2 can be reduced Poorly charged pixels. Therefore, the driving device of the backlight module of the present disclosure can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
  • a first driving circuit 101 includes a plurality of signal and non-driving a plurality of first sub-period correspondence
  • the driving signal sub-circuit, any first driving signal sub-circuit is used to output the first driving pulse signal V 1 to the light source 200 of the backlight module in the corresponding non-driving sub-time period.
  • the driving device of the backlight module further includes a timing acquisition circuit 103.
  • the timing acquisition circuit 103 is used to acquire the start time of each display period T, and calculate the The starting time is sent to the first driving signal circuit 101 and the second driving signal circuit 102.
  • the timing acquisition circuit 103 can actually acquire the start time and end time of each display period T.
  • the first driving signal circuit 101 and the second driving signal circuit 102 can ensure the stability and accuracy of the driving time period T 2 and the non-driving time period T 1 in each display period T, and avoid long-term accumulation of errors that cause the driving time period.
  • the judgment deviation between T 2 and the non-driving period T 1 avoids outputting the first driving pulse signal V 1 of higher frequency to the light source 200 during the driving period T 2 of the display period T.
  • a first driving circuit 101 is configured to signal: any two adjacent display period T, in a A high level is output to the light source 200 at the beginning of the display period T, and a low level is output to the light source 200 at the beginning of another display period T. In this way, it is possible to weaken the accumulated superposition of a high and low level transformation for a long time, and further improve the stability of the display effect of the liquid crystal module.
  • the driving device of the backlight module of the present disclosure may further include a preset frequency circuit 104 and a frequency determination circuit 105; wherein,
  • the preset frequency circuit 104 is used to obtain the preset frequency of the backlight module for backlight modulation; the frequency determination circuit 105 is used to determine the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency ; Wherein, the frequency of the first driving pulse signal V 1 is greater than the preset frequency; the frequency of the second driving pulse signal V 2 is less than the preset frequency.
  • the frequency determining circuit 105 includes at least an input terminal, a first output terminal, and a second output terminal; wherein the input terminal of the frequency determining circuit 105 is connected to the output terminal of the preset frequency circuit 104 for receiving the preset frequency;
  • the first output terminal of the frequency determining circuit 105 is connected to the input terminal of the first driving signal circuit 101, and is used to output the frequency of the first driving pulse signal V 1 to the first driving signal circuit 101;
  • the second output of the frequency determining circuit 105 The terminal is connected to the input terminal of the second driving signal circuit 102 and is used to output the frequency of the second driving pulse signal V 2 to the second driving signal circuit 102.
  • the backlight module may be provided such that a stable liquid crystal module, suitably Ground backlight.
  • the driving device of the backlight module may be implemented as a backlight driving IC (integrated circuit), and each circuit of the driving device may be a unit or module for implementing corresponding functions in the backlight driving IC, and these circuits may be implemented by hardware , Or through hardware combined with corresponding software instructions.
  • a backlight driving IC integrated circuit
  • the embodiments of the present disclosure also provide a backlight module, which includes any of the driving devices of the backlight module described in the above-mentioned driving device of the backlight module.
  • the backlight module may be an edge-light type backlight module, a direct type backlight module, a hollow type backlight module, or other types of backlight modules, which are not particularly limited in the present disclosure.
  • the driving device of the backlight module in the embodiment of the present disclosure is the same as the driving device of the backlight module in the above embodiment of the driving device of the backlight module. Therefore, it has the same beneficial effects and will not be repeated here.
  • the embodiments of the present disclosure also provide a display device, which includes any one of the backlight modules described in the foregoing backlight module embodiments.
  • the display device may be a mobile phone screen, a notebook computer, a computer screen, an electronic advertising screen or other types of liquid crystal display devices, which are not specifically limited in the present disclosure.
  • the backlight module used in the display device of the embodiment of the present disclosure is the same as the backlight module in the above-mentioned backlight module embodiment, and therefore, has the same beneficial effects, which will not be repeated here.

Abstract

A backlight module and a driving method and driving device therefor, and a display device. The driving method for a backlight module comprises driving the light source (200) of a backlight module to emit light in each display cycle (T). The method for driving the light source (200) of a backlight module to emit light in any display cycle (T) comprises: step S110, outputting a first driving pulse signal (V1) to the light source of a backlight module in the non-driving time period (T1) of a display cycle (T); and step S120, outputting a second driving pulse signal (V2) to the light source of the backlight module in the driving time period (T2) of the display cycle (T) (S120), wherein the frequency of the first driving pulse signal (V1) is greater than the frequency of the second driving pulse signal (V2). Without reducing the brightness of the backlight module, poor pixel charging can be mitigated, and the display effect of a liquid crystal module can be improved.

Description

背光模组及其驱动方法和驱动装置、显示装置Backlight module and its driving method, driving device and display device 技术领域Technical field
本公开涉及显示技术领域，尤其涉及一种背光模组及其驱动方法和驱动装置、显示装置。The present disclosure relates to the field of display technology, and in particular to a backlight module and its driving method, driving device, and display device.
背景技术Background technique
大尺寸液晶显示装置使用背光调光技术，通过调整PWM(脉冲宽度调制)的占空比和频率从而实现背光模组的亮度变化，以匹配液晶模组达到一定的显示效果。The large-size liquid crystal display device uses backlight dimming technology, and realizes the brightness change of the backlight module by adjusting the duty ratio and frequency of PWM (Pulse Width Modulation) to match the liquid crystal module to achieve a certain display effect.
但是液晶模组含有光感导体材料，背光模组亮暗的变化会激发液晶模组的导体特性变化，从而导致不同时间内像素的充电效果差异。这可能使得显示装置出现随背光变化的干涉现象，例如会使得显示装置出现扫描纹等问题，极大的影响了显示效果。However, the liquid crystal module contains a photosensitive conductor material, and the change of the brightness of the backlight module will stimulate the change of the conductor characteristics of the liquid crystal module, which will lead to the difference in the charging effect of the pixels at different times. This may cause the display device to exhibit interference phenomena that vary with the backlight, for example, it may cause problems such as scanning lines on the display device, which greatly affects the display effect.
所述背景技术部分公开的上述信息仅用于加强对本公开的背景的理解，因此它可以包括不构成对本领域普通技术人员已知的现有技术的信息。The above-mentioned information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, and therefore it may include information that does not constitute the prior art known to those of ordinary skill in the art.
发明内容Summary of the invention
本公开的目的在于提供一种背光模组及其驱动方法和驱动装置、显示装置，能够在不降低背光模组的亮度的前提下，降低像素充电不良，提高液晶模组的显示效果。The purpose of the present disclosure is to provide a backlight module, a driving method thereof, a driving device, and a display device, which can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
为实现上述发明目的，本公开采用如下技术方案：To achieve the above-mentioned purpose of the invention, the present disclosure adopts the following technical solutions:
根据本公开的第一个方面，提供一种背光模组的驱动方法，包括在每个显示周期内驱动背光模组的光源发光；其中，在任一显示周期内驱动背光模组的光源发光的方法包括：According to a first aspect of the present disclosure, a method for driving a backlight module is provided, which includes driving the light source of the backlight module to emit light in each display period; wherein, a method for driving the light source of the backlight module to emit light in any display period include:
在显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源；Outputting the first driving pulse signal to the light source of the backlight module during the non-driving period of the display period;
在显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源；Outputting the second driving pulse signal to the light source of the backlight module during the driving period of the display period;
其中，所述第一驱动脉冲信号的频率大于所述第二驱动脉冲信号的频率。Wherein, the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
在本公开的一种示例性实施例中，任一显示周期的非驱动时间段包括多个非驱动子时间段；在显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源包括：In an exemplary embodiment of the present disclosure, the non-driving period of any display period includes a plurality of non-driving sub-periods; during the non-driving period of the display period, the first driving pulse signal is output to the light source of the backlight module include:
在显示周期的各个非驱动子时间段，分别输出第一驱动脉冲信号至背光模组的光源。In each non-driving sub-time period of the display period, the first driving pulse signal is respectively output to the light source of the backlight module.
在本公开的一种示例性实施例中，所述背光模组的驱动方法还包括：In an exemplary embodiment of the present disclosure, the driving method of the backlight module further includes:
获取每个显示周期的起始时刻。Get the start time of each display period.
在本公开的一种示例性实施例中，所述背光模组的驱动方法还包括：In an exemplary embodiment of the present disclosure, the driving method of the backlight module further includes:
在任意相邻的两个显示周期中，在一个显示周期的起始时刻输出高电平至所述光源，在另一个显示周期的起始时刻输出低电平至所述光源。In any two adjacent display periods, a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
在本公开的一种示例性实施例中，所述背光模组的驱动方法还包括：In an exemplary embodiment of the present disclosure, the driving method of the backlight module further includes:
获取预设频率；Get the preset frequency;
根据所述预设频率，确定所述第一驱动脉冲信号的频率和所述第二驱动脉冲信号的频 率；其中，所述第一驱动脉冲信号的频率大于所述预设频率；所述第二驱动脉冲信号的频率小于所述预设频率。According to the preset frequency, the frequency of the first drive pulse signal and the frequency of the second drive pulse signal are determined; wherein the frequency of the first drive pulse signal is greater than the preset frequency; the second The frequency of the driving pulse signal is less than the preset frequency.
在本公开的一种示例性实施例中，确定所述第一驱动脉冲信号的频率和所述第二驱动脉冲信号的频率包括：In an exemplary embodiment of the present disclosure, determining the frequency of the first driving pulse signal and the frequency of the second driving pulse signal includes:
使得所述第一驱动脉冲信号的频率f 1和第二驱动脉冲信号的频率f 2满足如下关系式f 1*t 1+f 2*t 2＝f 0*(t 1+t 2)； Such that the frequency f of the frequency f 1 of the first drive pulse signal and the second driving pulse signal 2 satisfies the following relation f 1 * t 1 + f 2 * t 2 = f 0 * (t 1 + t 2);
其中，f 0为预设频率；t 1为显示周期的非驱动时间段的时间长度；t 2为显示周期的驱动时间段的时间长度。 Among them, f 0 is the preset frequency; t 1 is the time length of the non-driving period of the display period; t 2 is the time length of the driving period of the display period.
在本公开的一种示例性实施例中，所述背光模组的驱动方法还包括：In an exemplary embodiment of the present disclosure, the driving method of the backlight module further includes:
获取预设频率；Get the preset frequency;
根据所述预设频率，确定所述第一驱动脉冲信号在所述显示周期的每个非驱动子时间段内的频率，以及所述第二驱动脉冲信号的频率；其中，所述第一驱动脉冲信号在所述显示周期的任意非驱动子时间段内的频率大于所述预设频率，所述第二驱动脉冲信号的频率小于所述预设频率。According to the preset frequency, the frequency of the first driving pulse signal in each non-driving sub-period of the display period and the frequency of the second driving pulse signal are determined; wherein, the first driving The frequency of the pulse signal in any non-driving sub-time period of the display period is greater than the preset frequency, and the frequency of the second driving pulse signal is less than the preset frequency.
在本公开的一种示例性实施例中，确定所述第一驱动脉冲信号在所述显示周期的每个非驱动子时间段内的频率，以及所述第二驱动脉冲信号的频率包括：In an exemplary embodiment of the present disclosure, determining the frequency of the first driving pulse signal in each non-driving sub-period of the display period and the frequency of the second driving pulse signal include:
使得所述第一驱动脉冲信号在所述显示周期的每个非驱动子时间段内的频率，以及所述第二驱动脉冲信号的频率满足如下关系式：The frequency of the first driving pulse signal in each non-driving sub-time period of the display period and the frequency of the second driving pulse signal satisfy the following relationship:
Figure PCTCN2020086265-appb-000001
Figure PCTCN2020086265-appb-000001
其中，f 0为预设频率，f 1i为所述第一驱动脉冲信号在所述显示周期的第i个非驱动子时间段内的频率，f 2为第二驱动脉冲信号的频率，t 1i为所述显示周期的第i个非驱动子时间段的时间长度，t 2为显示周期的驱动时间段的时间长度，N为所述显示周期中非驱动子时间段的个数，且N为不小于1的正整数。 Where f 0 is the preset frequency, f 1i is the frequency of the first driving pulse signal in the i-th non-driving sub-period of the display period, f 2 is the frequency of the second driving pulse signal, and t 1i Is the time length of the i-th non-driving sub-period of the display period, t 2 is the time length of the driving period of the display period, N is the number of non-driving sub-periods in the display period, and N is A positive integer not less than 1.
根据本公开的第二个方面，提供一种背光模组的驱动装置，包括：According to a second aspect of the present disclosure, there is provided a driving device for a backlight module, including:
第一驱动信号电路，用于在每个显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源；The first driving signal circuit is used to output the first driving pulse signal to the light source of the backlight module in the non-driving time period of each display period;
第二驱动信号电路，用于在每个显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源；The second driving signal circuit is used to output the second driving pulse signal to the light source of the backlight module in the driving time period of each display cycle;
其中，所述第一驱动脉冲信号的频率大于所述第二驱动脉冲信号的频率。Wherein, the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
在本公开的一种示例性实施例中，任一显示周期的非驱动时间段包括多个非驱动子时间段；In an exemplary embodiment of the present disclosure, the non-driving period of any display period includes a plurality of non-driving sub-periods;
第一驱动信号电路包括与所述多个非驱动子时间段一一对应的多个第一驱动信号子电路，任一第一驱动信号子电路用于在对应的所述非驱动子时间段输出第一驱动脉冲信号 至背光模组的光源。The first driving signal circuit includes a plurality of first driving signal sub-circuits corresponding to the plurality of non-driving sub-periods one-to-one, and any one of the first driving signal sub-circuits is used for outputting in the corresponding non-driving sub-period The first driving pulse signal to the light source of the backlight module.
在本公开的一种示例性实施例中，所述背光模组的驱动装置还包括：In an exemplary embodiment of the present disclosure, the driving device of the backlight module further includes:
时序获取电路，用于获取每一显示周期的起始时刻，并将每一显示周期的起始时刻发送至所述第一驱动信号电路和所述第二驱动信号电路。The timing acquisition circuit is used to acquire the start time of each display period and send the start time of each display period to the first drive signal circuit and the second drive signal circuit.
在本公开的一种示例性实施例中，所述显示周期的起始时刻在显示周期的非驱动时间段内，所述第一驱动信号电路被配置为：In an exemplary embodiment of the present disclosure, the start time of the display period is within a non-driving period of the display period, and the first driving signal circuit is configured to:
在任意相邻的两个显示周期中，在一个显示周期的起始时刻输出高电平至所述光源，在另一个显示周期的起始时刻输出低电平至所述光源。In any two adjacent display periods, a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
根据本公开的第三个方面，提供一种背光模组，包括上述的背光模组的驱动装置。According to a third aspect of the present disclosure, there is provided a backlight module including the above-mentioned driving device for the backlight module.
根据本公开的第四个方面，提供一种显示装置，包括上述的背光模组。According to a fourth aspect of the present disclosure, there is provided a display device including the aforementioned backlight module.
本公开提供的背光模组及其驱动方法和驱动装置、显示装置，能够在显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源，且在显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源。由于液晶模组在显示周期的非驱动时间段内不对像素进行充电，因此第一驱动脉冲信号的频率较高不会导致像素充电不良。由于第一驱动脉冲信号的频率较高，因此第二驱动脉冲信号的频率可以较低而不会降低背光模组的亮度，且第二驱动脉冲信号的频率较低能够降低像素充电不良。因此，本公开的背光模组及其驱动方法和驱动装置、显示装置，能够在不降低背光模组的亮度的前提下，降低像素充电不良，提高液晶模组的显示效果。The backlight module and its driving method, driving device, and display device provided by the present disclosure can output the first driving pulse signal to the light source of the backlight module during the non-driving period of the display period, and output the first driving pulse signal during the driving period of the display period. 2. Drive the pulse signal to the light source of the backlight module. Since the liquid crystal module does not charge the pixels during the non-driving period of the display period, the high frequency of the first driving pulse signal will not cause poor pixel charging. Since the frequency of the first driving pulse signal is higher, the frequency of the second driving pulse signal can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal can reduce poor pixel charging. Therefore, the backlight module, its driving method, driving device, and display device of the present disclosure can reduce pixel charging failures and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
附图说明Description of the drawings
通过参照附图详细描述其示例实施方式，本公开的上述和其它特征及优点将变得更加明显。The above-mentioned and other features and advantages of the present disclosure will become more apparent by describing the exemplary embodiments thereof in detail with reference to the accompanying drawings.
图1是本公开实施方式的背光模组的驱动方法的流程示意图。FIG. 1 is a schematic flowchart of a driving method of a backlight module according to an embodiment of the present disclosure.
图2是本公开实施方式的显示周期的示意图。FIG. 2 is a schematic diagram of the display period of the embodiment of the present disclosure.
图3是本公开实施方式的背光模组的驱动方法的时序示意图。FIG. 3 is a timing diagram of a driving method of a backlight module according to an embodiment of the present disclosure.
图4是本公开实施方式的确定脉冲信号的频率的流程示意图。FIG. 4 is a schematic flowchart of determining the frequency of a pulse signal in an embodiment of the present disclosure.
图5是本公开实施方式的背光模组的驱动装置的结构示意图。FIG. 5 is a schematic structural diagram of a driving device for a backlight module according to an embodiment of the present disclosure.
图6是本公开实施方式的背光模组的驱动装置的结构示意图。FIG. 6 is a schematic structural diagram of a driving device of a backlight module according to an embodiment of the present disclosure.
图中主要元件附图标记说明如下：The main component reference signs in the figure are explained as follows:
101、第一驱动信号电路；102、第二驱动信号电路；103、时序获取电路；104、预设频率电路；105、频率确定电路；200、光源；T、显示周期；T 1、非驱动时间段；T 11、第一非驱动子时间段；T 12、第二非驱动子时间段；T 2、驱动时间段；V 1、第一驱动脉冲信号；V 2、第二驱动脉冲信号。 101. First drive signal circuit; 102. Second drive signal circuit; 103. Timing acquisition circuit; 104. Preset frequency circuit; 105. Frequency determination circuit; 200. Light source; T. Display period; T 1 , Non-driving time Segment; T 11 , the first non-driving sub-period; T 12 , the second non-driving sub-period; T 2 , the driving period; V 1 , the first driving pulse signal; V 2 , the second driving pulse signal.
具体实施方式Detailed ways
现在将参考附图更全面地描述示例实施例。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施例使得本公开将更加全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the examples set forth herein; on the contrary, the provision of these embodiments makes the present disclosure more comprehensive and complete, and fully conveys the concept of the example embodiments To those skilled in the art. The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure.
用语“一个”、“一”、“所述”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等。用语“第一”和“第二”等仅作为标记使用，不是对其对象的数量限制。The terms "a", "a", and "the" are used to indicate the presence of one or more elements/components/etc.; the terms "include" and "have" are used to indicate open-ended inclusion and mean In addition to the listed elements/components/etc., there may be additional elements/components/etc. The terms "first" and "second" are only used as markers and are not limited to the number of objects.
本公开实施方式中提供一种背光模组的驱动方法，该背光模组的驱动方法包括，在每个显示周期内驱动背光模组的光源发光；其中，如图1所示，在任一显示周期内驱动背光模组的光源发光的方法包括：The embodiments of the present disclosure provide a method for driving a backlight module. The method for driving the backlight module includes driving the light source of the backlight module to emit light in each display period; wherein, as shown in FIG. 1, during any display period The method of internally driving the light source of the backlight module to emit light includes:
步骤S110，在显示周期的非驱动时间段输出第一驱动脉冲信号V1至背光模组的光源；Step S110, output the first driving pulse signal V1 to the light source of the backlight module during the non-driving period of the display period;
步骤S120，在显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源；Step S120, output a second driving pulse signal to the light source of the backlight module during the driving period of the display period;
其中，第一驱动脉冲信号的频率大于第二驱动脉冲信号的频率。Wherein, the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
液晶模组在显示周期的非驱动时间段内不对像素进行充电，因此第一驱动脉冲信号的频率较高不会导致像素充电不良。由于第一驱动脉冲信号的频率较高，因此第二驱动脉冲信号的频率可以较低而不会降低背光模组的亮度，且第二驱动脉冲信号的频率较低能够降低像素充电不良。因此，本公开的背光模组的驱动方法，能够在不降低背光模组的亮度的前提下，降低像素充电不良，提高液晶模组的显示效果。The liquid crystal module does not charge the pixels during the non-driving time period of the display period, so the high frequency of the first driving pulse signal will not cause poor pixel charging. Since the frequency of the first driving pulse signal is higher, the frequency of the second driving pulse signal can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal can reduce poor pixel charging. Therefore, the driving method of the backlight module of the present disclosure can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
下面结合附图对本公开实施方式提供的背光模组的驱动方法的各步骤进行详细说明：The steps of the backlight module driving method provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings:
图2为一个显示周期的示意图。其中，本公开中的显示周期T，为显示装置的一个帧周期。根据图2可知，一个显示周期T包括驱动时间段T 2和非驱动时间段T 1。在驱动时间段T 2内，液晶模组的驱动装置向像素发出驱动信号，使得像素充电。在非驱动时间段T 1内，液晶模组不向像素发出驱动信号，因此像素的状态维持不变。 Figure 2 is a schematic diagram of a display cycle. Among them, the display period T in the present disclosure is one frame period of the display device. According to FIG. 2, it can be seen that one display period T includes a driving period T 2 and a non-driving period T 1 . In the drive period T 2, the liquid crystal driving device module sends a drive signal to the pixel, such pixel charging. In the non-driving period T 1, the liquid crystal module does not issue a drive signal to the pixel, and therefore the pixel state is maintained unchanged.
因此，在非驱动时间段T 1内，若背光模组的发光状态发生了变化，则液晶模组的部分结构的导电性能发生变化；但是由于液晶模组的驱动装置并不向像素发出驱动信号，像素并不充电，因此像素的状态不会受到影响。因此，背光模组在非驱动时间段T 1内进行调光，并不会影响像素的充电，进而不会影响液晶模组的显示效果。 Thus, in the non-driving period T 1, when the light emission state of the backlight module is changed, the conductivity of the liquid crystal module partial structure change; but since the liquid crystal driving device module does not issue a drive signal to the pixel , The pixel is not charged, so the state of the pixel will not be affected. Accordingly, the backlight module in the non-driving period T 1 dimming, and will not affect the charging of the pixel, and thus does not affect the liquid crystal display module.
在驱动时间段T 2内，若背光模组的发光状态发生了变化，则液晶模组的部分结构的导电性能发生变化；由于液晶模组的驱动装置正在向像素发出驱动信号，像素可能正在充电，因此像素的充电率可能会发生变化。因此，在驱动时间段T 2内，若调整背光模组的发光状态，可能会导致液晶模组的像素充电率出现差异，进而会影响液晶模组的显示效果。本公开的背光模组的驱动方法，由于通过第一驱动脉冲信号提高了在非驱动时间段T 1内 背光模组的发光状态调节频率，因此可以降低第二驱动脉冲信号的频率，进而降低液晶模组在驱动时间段T 2内调节发光状态的频率，降低液晶模组的像素充电率的差异，进而可以提高液晶模组的显示效果。 In the drive period T 2, if the backlight module emission state has changed, the conductivity of the liquid crystal module partial structure changes; the drive means of the liquid crystal module is sending a drive signal to the pixel, the pixel may be charging , So the charging rate of the pixel may change. Therefore, in the driving time period T 2 , if the light-emitting state of the backlight module is adjusted, the pixel charging rate of the liquid crystal module may be different, and the display effect of the liquid crystal module may be affected. In the driving method of the backlight module of the present disclosure, the light-emitting state adjustment frequency of the backlight module in the non-driving time period T 1 is increased by the first driving pulse signal, so the frequency of the second driving pulse signal can be reduced, thereby reducing the liquid crystal The module adjusts the frequency of the light-emitting state during the driving time period T 2 to reduce the difference in the pixel charging rate of the liquid crystal module, thereby improving the display effect of the liquid crystal module.
任一显示周期T的非驱动时间段T 1可以包括多个非驱动子时间段。举例而言，如图3所示，在一实施方式中，非驱动时间段T 1可以包括第一非驱动子时间段T 11和第二非驱动子时间段T 12，其中，第一非驱动子时间段T 11的起始时刻为显示周期T的起始时刻，第二非驱动子时间段T 12的终止时刻为显示周期T的终止时刻，在第一非驱动子时间段T 11和第二非驱动子时间段T 12之间为显示周期T的驱动时间段T 2。 A display cycle T is any non-driving period T. 1 may include a plurality of non-driven sub-periods. For example, as shown in FIG. 3, in one embodiment, the non-driving period T 1 may include a first non-driven sub-period T 11 and the second non-sub-driving period T 12, wherein the first non-driving The start time of the sub-time period T 11 is the start time of the display period T, and the end time of the second non-driving sub period T 12 is the end time of the display period T. In the first non-driving sub period T 11 and the first non-driving sub period T 11 Between the two non-driving sub-time periods T 12 is the driving time period T 2 of the display period T.
在一实施方式中，可以在一个或者多个非驱动子时间段内分别输出第一驱动脉冲信号V 1至背光模组的光源，即可以在部分非驱动子时间段内不输出第一驱动脉冲信号V 1至背光模组的光源，以简化背光模组的驱动方法。 In one embodiment, the first driving pulse signal V 1 may be output to the light source of the backlight module in one or more non-driving sub-periods, that is, the first driving pulse may not be output in some non-driving sub-periods The signal V 1 is sent to the light source of the backlight module to simplify the driving method of the backlight module.
在另一实施方式中，如图3所示，在显示周期T的各个非驱动子时间段，分别输出第一驱动脉冲信号V 1至背光模组的光源，即在显示周期T的每个非驱动子时间段内均输出第一驱动脉冲信号V 1至背光模组的光源。如此，可以尽可能提高第一驱动脉冲信号V 1的占比，进一步降低第二驱动脉冲信号V 2的频率，进而进一步提高液晶模组的显示效果。 In another embodiment, as shown in FIG. 3, in each non-driving sub-period of the display period T, the first driving pulse signal V 1 is output to the light source of the backlight module, that is, during each non-driving sub-period of the display period T, The first driving pulse signal V 1 is output to the light source of the backlight module in the driving sub-time period. In this way, the proportion of the first driving pulse signal V 1 can be increased as much as possible, and the frequency of the second driving pulse signal V 2 can be further reduced, thereby further improving the display effect of the liquid crystal module.
根据本公开的一些实施例，非驱动时间段例如可以安排在STV帧频信号给出前的信号Blanking区。在该Blanking区，区域全屏内无像素充电，即使显示器件内部受光照变化影响，也不会最终产生充电率的差异。通过将PWM高低电平的切换时间安排在Blanking区，可减少每一帧信号内所受光照亮度变化的数量，进而减少其影响。According to some embodiments of the present disclosure, the non-driving time period may be arranged in the signal blanking area before the STV frame rate signal is given, for example. In the Blanking area, there is no pixel charging in the full screen area, even if the display device is affected by changes in light, there will be no difference in charging rate. By arranging the switching time of PWM high and low level in the Blanking area, the number of changes in the brightness of the light received in each frame of the signal can be reduced, thereby reducing its impact.
本公开提供的背光模组的驱动方法还可以包括确定第一驱动脉冲信号的频率和第二驱动脉冲信号的频率。在一实施方式中，如图4所示，可以通过如下方法确定脉冲信号的频率：The driving method of the backlight module provided in the present disclosure may further include determining the frequency of the first driving pulse signal and the frequency of the second driving pulse signal. In an embodiment, as shown in FIG. 4, the frequency of the pulse signal can be determined by the following method:
步骤S210，获取预设频率；Step S210, obtaining a preset frequency;
步骤S220，根据预设频率，确定第一驱动脉冲信号V 1的频率和第二驱动脉冲信号V 2的频率；其中，第一驱动脉冲信号V 1的频率大于预设频率；第二驱动脉冲信号V 2的频率小于预设频率。 Step S220: Determine the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency; wherein the frequency of the first driving pulse signal V 1 is greater than the preset frequency; the second driving pulse signal The frequency of V 2 is less than the preset frequency.
如此，根据预设频率确定第一驱动脉冲信号V 1的频率和第二驱动脉冲信号V 2的频率，可以有效地保证背光模组的发光效果，使得背光模组可以为液晶模组提供稳定、适宜地背光。 In this way, determining the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency can effectively ensure the light-emitting effect of the backlight module, so that the backlight module can provide stable, Properly backlit.
在一实施方式中，可以使得第一驱动脉冲信号V 1的频率f 1和第二驱动脉冲信号V 2的频率f 2满足如下关系式f 1*t 1+f 2*t 2＝f 0*(t 1+t 2)； In one embodiment, the drive may be such that a first pulse signal V 1 and the frequency f 1 of the second drive pulse signal the frequency f 2 V 2 satisfies the following relation f 1 * t 1 + f 2 * t 2 = f 0 * (t 1 +t 2 );
其中，f 0为预设频率；t 1为显示周期T的非驱动时间段T 1的时间长度；t 2为显示周期T的驱动时间段T 2的时间长度。在显示周期T的非驱动时间段T 1，第一驱动脉冲信号V 1的频率f 1可以保持不变，以简化背光模组的驱动方法。 Among them, f 0 is the preset frequency; t 1 is the time length of the non-driving time period T 1 of the display period T; t 2 is the time length of the driving time period T 2 of the display period T. In the non-display period T of the driving period T 1, a first drive pulse frequency f 1 of the signal V 1 can be kept constant to simplify the driving method of the backlight module.
在另一实施方式中，可以根据预设频率f 0，确定第一驱动脉冲信号V 1在显示周期T的每个非驱动子时间段内的频率，以及第二驱动脉冲信号V 2的频率；其中，第一驱动脉冲信号V 1在显示周期T的任意非驱动子时间段内的频率大于预设频率，第二驱动脉冲信号V 2的频率小于预设频率。在不同的非驱动子时间段内，第一驱动脉冲信号V 1的频率可以不同，如此可以使得背光模组能够更充分、更灵活地利用非驱动子时间段进行调光，进一步降低在驱动时间段T 2的光源亮度调节，进一步提高液晶模组的显示效果。 In another embodiment, the frequency of the first driving pulse signal V 1 in each non-driving sub-period of the display period T and the frequency of the second driving pulse signal V 2 may be determined according to the preset frequency f 0 ; The frequency of the first driving pulse signal V 1 in any non-driving sub-time period of the display period T is greater than the preset frequency, and the frequency of the second driving pulse signal V 2 is less than the preset frequency. In different non-driving sub-periods, the frequency of the first driving pulse signal V 1 can be different, so that the backlight module can use the non-driving sub-periods for dimming more fully and flexibly, and further reduce the driving time. The brightness adjustment of the light source in the segment T 2 further improves the display effect of the liquid crystal module.
可选的，可以使得第一驱动脉冲信号V 1在显示周期T的每个非驱动子时间段内的频率，以及第二驱动脉冲信号V 2的频率满足如下关系式： Optionally, the frequency of the first driving pulse signal V 1 in each non-driving sub-period of the display period T and the frequency of the second driving pulse signal V 2 may satisfy the following relationship:
Figure PCTCN2020086265-appb-000002
Figure PCTCN2020086265-appb-000002
其中，f 0为预设频率，f 1i为第一驱动脉冲信号V 1在显示周期T的第i个非驱动子时间段内的频率，f 2为第二驱动脉冲信号V 2的频率，t 1i为显示周期T的第i个非驱动子时间段的时间长度，t 2为显示周期T的驱动时间段T 2的时间长度，N为显示周期T中非驱动子时间段的个数，且N为不小于1的正整数。 Among them, f 0 is the preset frequency, f 1i is the frequency of the first driving pulse signal V 1 in the i-th non-driving sub-period of the display period T, f 2 is the frequency of the second driving pulse signal V 2 , t 1i is the time length of the i-th non-driving sub-period of the display period T, t 2 is the time length of the driving period T 2 of the display period T, N is the number of non-driving sub-periods in the display period T, and N is a positive integer not less than 1.
如图3所示，第一驱动脉冲信号V 1和第二驱动脉冲信号V 2可以为PWM(脉冲宽度调制)信号。在一实施方式中，第一驱动脉冲信号V 1和第二驱动脉冲信号V 2为高电平，用于驱动背光模组的光源发光。在高电平信号之间，可以为低电平信号，低电平信号不能驱动背光模组的光源发光。 As shown in FIG. 3, the first driving pulse signal V 1 and the second driving pulse signal V 2 may be PWM (pulse width modulation) signals. In one embodiment, the first driving pulse signal V 1 and the second driving pulse signal V 2 are at a high level and are used to drive the light source of the backlight module to emit light. Between high-level signals, it can be low-level signals, and low-level signals cannot drive the light source of the backlight module to emit light.
本公开提供的背光模组的驱动方法还可以包括获取每个显示周期T的起始时刻。如图2所示，由于上一显示周期T的起始时刻与下一显示周期T的终止时刻为同一时刻，因此获取每个显示周期T的起始时刻就可以获取每个显示周期T的起始时刻和终止时刻。如此，按照本公开的背光模组的驱动方法，可以保证每个显示周期T内驱动时间段T 2和非驱动时间段T 1的稳定和准确，避免长期累积的误差导致对驱动时间段T 2和非驱动时间段T 1的判断偏差，避免在显示周期T的驱动时间段T 2输出较高频率的第一驱动脉冲信号V 1至光源。 The driving method of the backlight module provided in the present disclosure may further include acquiring the start time of each display period T. As shown in Figure 2, since the start time of the last display period T and the end time of the next display period T are the same time, the start time of each display period T can be obtained by obtaining the start time of each display period T. Start time and end time. In this way, according to the driving method of the backlight module of the present disclosure, it is possible to ensure the stability and accuracy of the driving time period T 2 and the non-driving time period T 1 in each display period T, and avoid long-term accumulation of errors that cause the driving time period T 2 The judgment deviation from the non-driving time period T 1 avoids outputting the first driving pulse signal V 1 of higher frequency to the light source during the driving time period T 2 of the display period T.
本公开提供的背光模组的驱动方法还可以包括：在任意相邻的两个显示周期T中，在一个显示周期T的起始时刻输出高电平至光源，在另一个显示周期T的起始时刻输出低电平至光源。如此，可以削弱长时间一种高低电平变换的累计叠加，进一步提高液晶模组显示的稳定性。The driving method of the backlight module provided by the present disclosure may further include: in any two adjacent display periods T, outputting a high level to the light source at the beginning of one display period T, and at the beginning of another display period T Output low level to the light source at the beginning. In this way, it is possible to weaken the accumulated superposition of a high and low level transition for a long time, and further improve the stability of the display of the liquid crystal module.
需要说明的是，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等，均应视为本公开的一部分。It should be noted that although the various steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be performed in the specific order, or that all the steps shown must be performed to Achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step to be executed, and/or one step may be decomposed into multiple steps to be executed, etc., all should be regarded as part of the present disclosure.
本公开实施方式中还提供一种背光模组的驱动装置，用于在每个显示周期T内驱动背 光模组的光源200发光。如图5所示，本公开的背光模组的驱动装置包括第一驱动信号电路101和第二驱动信号电路102，其中，The embodiment of the present disclosure also provides a driving device for the backlight module, which is used to drive the light source 200 of the backlight module to emit light in each display period T. As shown in FIG. 5, the driving device of the backlight module of the present disclosure includes a first driving signal circuit 101 and a second driving signal circuit 102, wherein,
第一驱动信号电路101用于在每个显示周期T的非驱动时间段T 1输出第一驱动脉冲信号V 1至背光模组的光源200；第二驱动信号电路102用于在每个显示周期T的驱动时间段T 2输出第二驱动脉冲信号V 2至背光模组的光源200；其中，第一驱动脉冲信号V 1的频率大于第二驱动脉冲信号V 2的频率。 The first driving signal circuit 101 is used for outputting the first driving pulse signal V 1 to the light source 200 of the backlight module during the non-driving time period T 1 of each display period T; the second driving signal circuit 102 is used for each display period The driving period T 2 of T outputs the second driving pulse signal V 2 to the light source 200 of the backlight module; wherein the frequency of the first driving pulse signal V 1 is greater than the frequency of the second driving pulse signal V 2 .
液晶模组在显示周期T的非驱动时间段T 1内不对像素进行充电，因此第一驱动脉冲信号V 1的频率较高不会导致像素充电不良。由于第一驱动脉冲信号V 1的频率较高，因此第二驱动脉冲信号V 2的频率可以较低而不会降低背光模组的亮度，且第二驱动脉冲信号V 2的频率较低能够降低像素充电不良。因此，本公开的背光模组的驱动装置，能够在不降低背光模组的亮度的前提下，降低像素充电不良，提高液晶模组的显示效果。 The liquid crystal module does not charge the pixels during the non-driving time period T 1 of the display period T. Therefore, the high frequency of the first driving pulse signal V 1 will not cause poor pixel charging. Since the frequency of the first driving pulse signal V 1 is higher, the frequency of the second driving pulse signal V 2 can be lower without reducing the brightness of the backlight module, and the lower frequency of the second driving pulse signal V 2 can be reduced Poorly charged pixels. Therefore, the driving device of the backlight module of the present disclosure can reduce pixel charging defects and improve the display effect of the liquid crystal module without reducing the brightness of the backlight module.
下面结合附图对本公开实施方式提供的背光模组的驱动装置的各部分进行详细说明：The following describes in detail each part of the backlight module driving device provided by the embodiments of the present disclosure with reference to the accompanying drawings:
在一实施方式中，任一显示周期T的非驱动时间段T 1包括多个非驱动子时间段；第一驱动信号电路101包括与多个非驱动子时间段一一对应的多个第一驱动信号子电路，任一第一驱动信号子电路用于在对应的非驱动子时间段输出第一驱动脉冲信号V 1至背光模组的光源200。 In one embodiment, includes a plurality of any of the non-driving period T of a sub display period of non-driving period T. 1; a first driving circuit 101 includes a plurality of signal and non-driving a plurality of first sub-period correspondence The driving signal sub-circuit, any first driving signal sub-circuit is used to output the first driving pulse signal V 1 to the light source 200 of the backlight module in the corresponding non-driving sub-time period.
在一实施方式中，如图6所示，背光模组的驱动装置还包括时序获取电路103，时序获取电路103用于获取每一显示周期T的起始时刻，并将每一显示周期T的起始时刻发送至第一驱动信号电路101和第二驱动信号电路102。In one embodiment, as shown in FIG. 6, the driving device of the backlight module further includes a timing acquisition circuit 103. The timing acquisition circuit 103 is used to acquire the start time of each display period T, and calculate the The starting time is sent to the first driving signal circuit 101 and the second driving signal circuit 102.
由于上一显示周期T的起始时刻与下一显示周期T的终止时刻为同一时刻，因此时序获取电路103事实上可以获取每个显示周期T的起始时刻和终止时刻。如此，第一驱动信号电路101和第二驱动信号电路102可以保证每个显示周期T内驱动时间段T 2和非驱动时间段T 1的稳定和准确，避免长期累积的误差导致对驱动时间段T 2和非驱动时间段T 1的判断偏差，避免在显示周期T的驱动时间段T 2输出较高频率的第一驱动脉冲信号V 1至光源200。 Since the start time of the previous display period T and the end time of the next display period T are the same time, the timing acquisition circuit 103 can actually acquire the start time and end time of each display period T. In this way, the first driving signal circuit 101 and the second driving signal circuit 102 can ensure the stability and accuracy of the driving time period T 2 and the non-driving time period T 1 in each display period T, and avoid long-term accumulation of errors that cause the driving time period. The judgment deviation between T 2 and the non-driving period T 1 avoids outputting the first driving pulse signal V 1 of higher frequency to the light source 200 during the driving period T 2 of the display period T.
在一实施方式中，显示周期T的起始时刻在显示周期T的非驱动时间段T 1内，第一驱动信号电路101被配置为：在任意相邻的两个显示周期T中，在一个显示周期T的起始时刻输出高电平至光源200，在另一个显示周期T的起始时刻输出低电平至光源200。如此，可以削弱长时间一种高低电平变换的累计叠加，进一步提高液晶模组显示效果的稳定性。 In one embodiment, the display starting time of the period T T in the non-display period of drive period T 1, a first driving circuit 101 is configured to signal: any two adjacent display period T, in a A high level is output to the light source 200 at the beginning of the display period T, and a low level is output to the light source 200 at the beginning of another display period T. In this way, it is possible to weaken the accumulated superposition of a high and low level transformation for a long time, and further improve the stability of the display effect of the liquid crystal module.
如图6所示，本公开的背光模组的驱动装置还可以包括预设频率电路104和频率确定电路105；其中，As shown in FIG. 6, the driving device of the backlight module of the present disclosure may further include a preset frequency circuit 104 and a frequency determination circuit 105; wherein,
预设频率电路104用于获取背光模组进行背光调制的预设频率；频率确定电路105用于根据预设频率，确定第一驱动脉冲信号V 1的频率和第二驱动脉冲信号V 2的频率；其中， 第一驱动脉冲信号V 1的频率大于预设频率；第二驱动脉冲信号V 2的频率小于预设频率。 The preset frequency circuit 104 is used to obtain the preset frequency of the backlight module for backlight modulation; the frequency determination circuit 105 is used to determine the frequency of the first driving pulse signal V 1 and the frequency of the second driving pulse signal V 2 according to the preset frequency ; Wherein, the frequency of the first driving pulse signal V 1 is greater than the preset frequency; the frequency of the second driving pulse signal V 2 is less than the preset frequency.
可选的，频率确定电路105至少包括输入端、第一输出端和第二输出端；其中，频率确定电路105的输入端与预设频率电路104的输出端连接，用于接收预设频率；频率确定电路105的第一输出端与第一驱动信号电路101的输入端连接，用于将第一驱动脉冲信号V 1的频率输出至第一驱动信号电路101；频率确定电路105的第二输出端与第二驱动信号电路102的输入端连接，用于将第二驱动脉冲信号V 2的频率输出至第二驱动信号电路102。 Optionally, the frequency determining circuit 105 includes at least an input terminal, a first output terminal, and a second output terminal; wherein the input terminal of the frequency determining circuit 105 is connected to the output terminal of the preset frequency circuit 104 for receiving the preset frequency; The first output terminal of the frequency determining circuit 105 is connected to the input terminal of the first driving signal circuit 101, and is used to output the frequency of the first driving pulse signal V 1 to the first driving signal circuit 101; the second output of the frequency determining circuit 105 The terminal is connected to the input terminal of the second driving signal circuit 102 and is used to output the frequency of the second driving pulse signal V 2 to the second driving signal circuit 102.
如此，根据预设频率确定第一驱动脉冲信号V 1的频率和第二驱动脉冲信号V2的频率，可以有效地保证背光模组的发光效果，使得背光模组可以为液晶模组提供稳定、适宜地背光。 Thus, a predetermined frequency and a second frequency determining the driving frequency pulse signal V2 of the first driving pulse signal according to V 1, can effectively guarantee the lighting effect of the backlight module, the backlight module may be provided such that a stable liquid crystal module, suitably Ground backlight.
在一些实施例中，背光模组的驱动装置可以实现为背光驱动IC(集成电路)，驱动装置的各个电路可以是背光驱动IC中用于实现相应功能的单元或模块，这些电路可以通过硬件实现，或通过硬件结合相应的软件指令实现。In some embodiments, the driving device of the backlight module may be implemented as a backlight driving IC (integrated circuit), and each circuit of the driving device may be a unit or module for implementing corresponding functions in the backlight driving IC, and these circuits may be implemented by hardware , Or through hardware combined with corresponding software instructions.
本公开的背光模组的驱动装置的原理、细节和效果在本公开的背光模组的驱动方法实施方式中进行了详细的描述，本公开在此不再赘述。The principles, details and effects of the driving device of the backlight module of the present disclosure are described in detail in the embodiment of the driving method of the backlight module of the present disclosure, and the details of this disclosure will not be repeated here.
本公开实施方式中还提供一种背光模组，该背光模组包括上述背光模组的驱动装置实施方式中所描述的任意一种背光模组的驱动装置。该背光模组可以为侧光式背光模组、直下式背光模组、中空式背光模组或者其他类型的背光模组，本公开对此不做特殊的限定。The embodiments of the present disclosure also provide a backlight module, which includes any of the driving devices of the backlight module described in the above-mentioned driving device of the backlight module. The backlight module may be an edge-light type backlight module, a direct type backlight module, a hollow type backlight module, or other types of backlight modules, which are not particularly limited in the present disclosure.
本公开实施方式的背光模组采用的驱动装置与上述背光模组的驱动装置的实施方式中的背光模组的驱动装置相同，因此，具有相同的有益效果，在此不再赘述。The driving device of the backlight module in the embodiment of the present disclosure is the same as the driving device of the backlight module in the above embodiment of the driving device of the backlight module. Therefore, it has the same beneficial effects and will not be repeated here.
本公开实施方式中还提供一种显示装置，该显示装置包括上述背光模组实施方式中所描述的任意一种背光模组。该显示装置可以为手机屏幕、笔记本电脑、电脑屏幕、电子广告屏或者其他类型的液晶显示装置，本公开对此不做特殊的限定。The embodiments of the present disclosure also provide a display device, which includes any one of the backlight modules described in the foregoing backlight module embodiments. The display device may be a mobile phone screen, a notebook computer, a computer screen, an electronic advertising screen or other types of liquid crystal display devices, which are not specifically limited in the present disclosure.
本公开实施方式的显示装置采用的背光模组与上述背光模组实施方式中的背光模组相同，因此，具有相同的有益效果，在此不再赘述。The backlight module used in the display device of the embodiment of the present disclosure is the same as the backlight module in the above-mentioned backlight module embodiment, and therefore, has the same beneficial effects, which will not be repeated here.
应可理解的是，本公开不将其应用限制到本说明书提出的部件的详细结构和布置方式。本公开能够具有其他实施方式，并且能够以多种方式实现并且执行。前述变形形式和修改形式落在本公开的范围内。应可理解的是，本说明书公开和限定的本公开延伸到文中和/或附图中提到或明显的两个或两个以上单独特征的所有可替代组合。所有这些不同的组合构成本公开的多个可替代方面。本说明书所述的实施方式说明了已知用于实现本公开的最佳方式，并且将使本领域技术人员能够利用本公开。It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of components proposed in this specification. The present disclosure can have other embodiments, and can be implemented and executed in various ways. The aforementioned deformations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or obvious in the text and/or drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best way known for implementing the present disclosure, and will enable those skilled in the art to utilize the present disclosure.

Claims (14)

  1. 一种背光模组的驱动方法，其特征在于，包括在每个显示周期内驱动背光模组的光源发光；其中，在任一显示周期内驱动背光模组的光源发光的方法包括：A driving method of a backlight module, characterized in that it comprises driving the light source of the backlight module to emit light in each display period; wherein the method of driving the light source of the backlight module to emit light in any display period includes:
    在显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源；Outputting the first driving pulse signal to the light source of the backlight module during the non-driving period of the display period;
    在显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源；Outputting the second driving pulse signal to the light source of the backlight module during the driving period of the display period;
    其中，所述第一驱动脉冲信号的频率大于所述第二驱动脉冲信号的频率。Wherein, the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
  2. 根据权利要求1所述的背光模组的驱动方法，其特征在于，任一显示周期的非驱动时间段包括多个非驱动子时间段；在显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源包括：The driving method of the backlight module according to claim 1, wherein the non-driving period of any display period includes a plurality of non-driving sub-periods; and the first driving pulse signal is output during the non-driving period of the display period The light source to the backlight module includes:
    在显示周期的各个非驱动子时间段，分别输出第一驱动脉冲信号至背光模组的光源。In each non-driving sub-time period of the display period, the first driving pulse signal is respectively output to the light source of the backlight module.
  3. 根据权利要求1或2所述的背光模组的驱动方法，其特征在于，所述背光模组的驱动方法还包括：The driving method of the backlight module according to claim 1 or 2, wherein the driving method of the backlight module further comprises:
    获取每个显示周期的起始时刻。Get the start time of each display period.
  4. 根据权利要求1或2所述的背光模组的驱动方法，其特征在于，所述背光模组的驱动方法还包括：The driving method of the backlight module according to claim 1 or 2, wherein the driving method of the backlight module further comprises:
    在任意相邻的两个显示周期中，在一个显示周期的起始时刻输出高电平至所述光源，在另一个显示周期的起始时刻输出低电平至所述光源。In any two adjacent display periods, a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
  5. 根据权利要求1所述的背光模组的驱动方法，其特征在于，所述背光模组的驱动方法还包括：The driving method of the backlight module according to claim 1, wherein the driving method of the backlight module further comprises:
    获取预设频率；Get the preset frequency;
    根据所述预设频率，确定所述第一驱动脉冲信号的频率和所述第二驱动脉冲信号的频率；其中，所述第一驱动脉冲信号的频率大于所述预设频率；所述第二驱动脉冲信号的频率小于所述预设频率。According to the preset frequency, the frequency of the first drive pulse signal and the frequency of the second drive pulse signal are determined; wherein the frequency of the first drive pulse signal is greater than the preset frequency; the second The frequency of the driving pulse signal is less than the preset frequency.
  6. 根据权利要求5所述的背光模组的驱动方法，其特征在于，确定所述第一驱动脉冲信号的频率和所述第二驱动脉冲信号的频率包括：The driving method of the backlight module according to claim 5, wherein determining the frequency of the first driving pulse signal and the frequency of the second driving pulse signal comprises:
    使得所述第一驱动脉冲信号的频率f 1和第二驱动脉冲信号的频率f 2满足如下关系式f 1*t 1+f 2*t 2＝f 0*(t 1+t 2)； Such that the frequency f of the frequency f 1 of the first drive pulse signal and the second driving pulse signal 2 satisfies the following relation f 1 * t 1 + f 2 * t 2 = f 0 * (t 1 + t 2);
    其中，f 0为预设频率；t 1为显示周期的非驱动时间段的时间长度；t 2为显示周期的驱动时间段的时间长度。 Among them, f 0 is the preset frequency; t 1 is the time length of the non-driving period of the display period; t 2 is the time length of the driving period of the display period.
  7. 根据权利要求2所述的背光模组的驱动方法，其特征在于，所述背光模组的驱动方法还包括：4. The driving method of the backlight module according to claim 2, wherein the driving method of the backlight module further comprises:
    获取预设频率；Get the preset frequency;
    根据所述预设频率，确定所述第一驱动脉冲信号在所述显示周期的每个非驱动 子时间段内的频率，以及所述第二驱动脉冲信号的频率；其中，所述第一驱动脉冲信号在所述显示周期的任意非驱动子时间段内的频率大于所述预设频率，所述第二驱动脉冲信号的频率小于所述预设频率。According to the preset frequency, the frequency of the first driving pulse signal in each non-driving sub-period of the display period and the frequency of the second driving pulse signal are determined; wherein, the first driving The frequency of the pulse signal in any non-driving sub-time period of the display period is greater than the preset frequency, and the frequency of the second driving pulse signal is less than the preset frequency.
  8. 根据权利要求7所述的背光模组的驱动方法，其特征在于，确定所述第一驱动脉冲信号在所述显示周期的每个非驱动子时间段内的频率，以及所述第二驱动脉冲信号的频率包括：8. The driving method of the backlight module according to claim 7, wherein the frequency of the first driving pulse signal in each non-driving sub-segment of the display period is determined, and the second driving pulse The frequency of the signal includes:
    使得所述第一驱动脉冲信号在所述显示周期的每个非驱动子时间段内的频率，以及所述第二驱动脉冲信号的频率满足如下关系式：The frequency of the first driving pulse signal in each non-driving sub-time period of the display period and the frequency of the second driving pulse signal satisfy the following relationship:
    Figure PCTCN2020086265-appb-100001
    Figure PCTCN2020086265-appb-100001
    其中，f 0为预设频率，f 1i为所述第一驱动脉冲信号在所述显示周期的第i个非驱动子时间段内的频率，f 2为第二驱动脉冲信号的频率，t 1i为所述显示周期的第i个非驱动子时间段的时间长度，t 2为显示周期的驱动时间段的时间长度，N为所述显示周期中非驱动子时间段的个数，且N为不小于1的正整数。 Where f 0 is the preset frequency, f 1i is the frequency of the first driving pulse signal in the i-th non-driving sub-period of the display period, f 2 is the frequency of the second driving pulse signal, and t 1i Is the time length of the i-th non-driving sub-period of the display period, t 2 is the time length of the driving period of the display period, N is the number of non-driving sub-periods in the display period, and N is A positive integer not less than 1.
  9. 一种背光模组的驱动装置，其特征在于，包括：A driving device for a backlight module is characterized by comprising:
    第一驱动信号电路，用于在每个显示周期的非驱动时间段输出第一驱动脉冲信号至背光模组的光源；The first driving signal circuit is used to output the first driving pulse signal to the light source of the backlight module in the non-driving time period of each display period;
    第二驱动信号电路，用于在每个显示周期的驱动时间段输出第二驱动脉冲信号至背光模组的光源；The second driving signal circuit is used to output the second driving pulse signal to the light source of the backlight module in the driving time period of each display cycle;
    其中，所述第一驱动脉冲信号的频率大于所述第二驱动脉冲信号的频率。Wherein, the frequency of the first driving pulse signal is greater than the frequency of the second driving pulse signal.
  10. 根据权利要求9所述的背光模组的驱动装置，其特征在于，任一显示周期的非驱动时间段包括多个非驱动子时间段；The driving device of the backlight module according to claim 9, wherein the non-driving period of any display period includes a plurality of non-driving sub-periods;
    第一驱动信号电路包括与所述多个非驱动子时间段一一对应的多个第一驱动信号子电路，任一第一驱动信号子电路用于在对应的所述非驱动子时间段输出第一驱动脉冲信号至背光模组的光源。The first driving signal circuit includes a plurality of first driving signal sub-circuits corresponding to the plurality of non-driving sub-periods one-to-one, and any one of the first driving signal sub-circuits is used for outputting in the corresponding non-driving sub-period The first driving pulse signal to the light source of the backlight module.
  11. 根据权利要求9或10所述的背光模组的驱动装置，其特征在于，所述背光模组的驱动装置还包括：The driving device of the backlight module according to claim 9 or 10, wherein the driving device of the backlight module further comprises:
    时序获取电路，用于获取每一显示周期的起始时刻，并将每一显示周期的起始时刻发送至所述第一驱动信号电路和所述第二驱动信号电路。The timing acquisition circuit is used to acquire the start time of each display period and send the start time of each display period to the first drive signal circuit and the second drive signal circuit.
  12. 根据权利要求9或10所述的背光模组的驱动装置，其特征在于，所述显示周期的起始时刻在显示周期的非驱动时间段内，所述第一驱动信号电路被配置为：The driving device of the backlight module according to claim 9 or 10, wherein the start time of the display period is within the non-driving time period of the display period, and the first driving signal circuit is configured as:
    在任意相邻的两个显示周期中，在一个显示周期的起始时刻输出高电平至所述光源，在另一个显示周期的起始时刻输出低电平至所述光源。In any two adjacent display periods, a high level is output to the light source at the beginning of one display period, and a low level is output to the light source at the beginning of the other display period.
  13. 一种背光模组，其特征在于，包括权利要求9～12任一项所述的背光模组的 驱动装置。A backlight module, characterized by comprising the backlight module driving device according to any one of claims 9-12.
  14. 一种显示装置，其特征在于，包括权利要求13所述的背光模组。A display device, characterized by comprising the backlight module of claim 13.
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