Backlight module and brightness adjusting method thereof

Abstract

The invention relates to a backlight module and a brightness adjusting method thereof. The backlight module comprises a first backlight area and a second backlight area, the first backlight area is equally divided into a plurality of first sub-areas, the second backlight area is equally divided into a plurality of second sub-areas, and the number of light-emitting diodes contained in a single first sub-area is larger than that of light-emitting diodes contained in a single second sub-area; the backlight module further comprises a first driving circuit connected with the multiple first sub-partitions and used for providing first driving voltage for each first sub-partition. The backlight module further comprises a second driving circuit connected with the second sub-partitions and used for providing second driving voltage for each second sub-partition, and the first driving voltage is larger than the second driving voltage. The backlight module can provide different driving voltages for a plurality of different partitions, and power consumption can be saved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a brightness adjustment method thereof. Background Art

[0002] The LCD (Liquid Crystal Display) backlight module mainly uses Local dimming technology to adjust the brightness. Local dimming technology calculates the LCD pixel data in partitions, and then turns the backlight of the partition on and off to achieve partitioned brightness control, thereby improving the brightness and darkness of the display.

[0003] Traditional backlight modules often have only one driving circuit and provide the same driving voltage to all partitions. For HUD (Head up Display) / AR-HUD (Augmented Reality Head Up Display) scenarios, relevant information needs to be displayed at specific locations. Therefore, traditional backlight modules provide the same driving voltage to partitions of different sizes, resulting in power waste. Summary of the invention

[0004] Based on this, it is necessary to provide a backlight module and a brightness adjustment method thereof to address the above technical issues, which can provide different driving voltages to multiple different partitions, thereby saving power consumption.

[0005] In a first aspect, the present application provides a backlight module, the backlight module comprising: a first backlight area and a second backlight area, wherein the first backlight area is equally divided into a plurality of first sub-areas, the second backlight area is equally divided into a plurality of second sub-areas, and the number of light-emitting diodes contained in a single first sub-area is greater than the number of light-emitting diodes contained in a single second sub-area;

[0006] The backlight module also includes a first driving circuit connected to multiple first sub-partitions respectively, for providing a first driving voltage to each first sub-partition; the backlight module also includes a second driving circuit connected to multiple second sub-partitions respectively, for providing a second driving voltage to each second sub-partition, and the first driving voltage is greater than the second driving voltage.

[0007] In one embodiment, a plurality of first sub-partitions are arranged in sequence in a row direction, a plurality of second sub-partitions are arranged in an array, and each first sub-partition is arranged in the same column as a column of second sub-partitions.

[0008] In one of the embodiments, the backlight module also includes a third backlight area, which is located on a side of the first backlight area away from the second backlight area, and the third backlight area is equally divided into a plurality of third sub-areas; the plurality of first sub-areas are equally divided into a plurality of groups by row, and the number of the plurality of third sub-areas is the same as the number of groups of the plurality of first sub-areas, and the backlight module also includes a third driving circuit respectively connected to the plurality of third sub-areas, for providing a third driving voltage to each third sub-area.

[0009] In one embodiment, the first driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single first sub-region.

[0010] In one embodiment, the second driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single second sub-region.

[0011] In one embodiment, the first backlight area is used to illuminate the first application display area in the display panel, and the first application display area is used to display the first application information. The second backlight area is used to illuminate the status display area in the display panel, and the status display area is used for normal display of status information.

[0012] In one of the embodiments, the third backlight area is used to illuminate the second application display area in the display panel, the second application display area is used to display second application information, and the first application information and the second application information are information of different applications respectively.

[0013] In one embodiment, the backlight module also includes a brightness adjustment unit; the brightness adjustment unit includes multiple first switches and multiple second switches; the multiple first switches are respectively connected to the multiple first sub-partitions, and are used to adjust the brightness of the light-emitting diodes in the connected first sub-partitions; the multiple second switches are respectively connected to the multiple second sub-partitions, and are used to adjust the brightness of the light-emitting diodes in the connected second sub-partitions.

[0014] In a second aspect, the present application provides a brightness adjustment method of a backlight module, which is applied to the above-mentioned backlight module, comprising:

[0015] After the backlight module is powered on, power is supplied to the first backlight area through the first driving circuit so that the light-emitting diodes contained in each of the multiple first sub-areas in the first backlight area are lit; power is supplied to the second backlight area through the second driving circuit so that the light-emitting diodes contained in each of the multiple second sub-areas in the second backlight area are lit.

[0016] In one embodiment, the brightness adjustment method of the backlight module further includes:

[0017] Acquire a first brightness requirement of a single first sub-region and a second brightness requirement of a single second sub-region;

[0018] Determine a first switching duration according to a first brightness requirement, and determine a second switching duration according to a second brightness requirement;

[0019] The plurality of first switches respectively connected to the plurality of first sub-areas in the brightness adjustment unit are controlled on-off according to the first switching duration, and the plurality of second switches respectively connected to the plurality of second sub-areas in the brightness adjustment unit are controlled on-off according to the second switching duration.

[0020] In the above-mentioned backlight module and the brightness adjustment method thereof, the first backlight area and the second backlight area contained in the backlight module are respectively equally divided into a plurality of first sub-areas and a plurality of second sub-areas, the plurality of first sub-areas are respectively connected to the first driving circuit, and the plurality of second sub-areas are respectively connected to the second driving circuit. Since the number of light-emitting diodes contained in a single first sub-area is greater than the number of light-emitting diodes contained in a single second sub-area, that is, the first sub-area is larger than the second sub-area, therefore, the first driving voltage provided by the first driving circuit to the first sub-area is greater than the second driving voltage provided by the second driving circuit to the second sub-area, which can ensure that the driving voltage meets the working requirements of the light-emitting diodes in each sub-area, and provides a smaller driving voltage to the sub-area with a smaller number of light-emitting diodes, which is beneficial to saving power consumption; in addition, after the backlight module is powered on, the first driving circuit supplies power to the first backlight area, and the second driving circuit supplies power to the second backlight area, which can ensure that the light-emitting diodes contained in each sub-area are lit. Since the light-emitting diodes in the backlight module are divided into sub-areas of different sizes, it is beneficial to independently adjust the brightness of each sub-area, thereby realizing fine adjustment of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] FIG1 is a schematic diagram of the partitioning of a backlight module in one embodiment;

[0023] FIG2 is a connection diagram of a first driving circuit in one embodiment;

[0024] FIG3 is a connection diagram of a second driving circuit in one embodiment;

[0025] FIG4 is a schematic diagram of partitioning of a display panel in one embodiment;

[0026] FIG5 is a schematic diagram of partitioning of a display panel in another embodiment;

[0027] FIG6 is a schematic diagram of a brightness adjustment module performing brightness adjustment in one embodiment;

[0028] FIG. 7 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] The backlight module provided in the embodiment of the present application can be applied to an LCD display device. As shown in FIG1 , the backlight module includes: a first backlight area 101 and a second backlight area 102, wherein the first backlight area 101 is equally divided into a plurality of first sub-areas 103, the second backlight area 102 is equally divided into a plurality of second sub-areas 104, and the number of light-emitting diodes included in a single first sub-area 103 is greater than the number of light-emitting diodes included in a single second sub-area 104; the backlight module also includes a first driving circuit (not shown) respectively connected to the plurality of first sub-areas, for providing a first driving voltage to each first sub-area 103; the backlight module also includes a second driving circuit respectively connected to the plurality of second sub-areas 104, for providing a second driving voltage to each second sub-area 104, and the first driving voltage is greater than the second driving voltage.

[0031] The LCD display device mainly includes a backlight module and a display panel. The backlight module is the light source of the LCD display device, providing background light to illuminate the display panel so that the display panel can display images normally.

[0032] In the HUD / AR-HUD scenario, relevant information needs to be displayed in a specific location. Therefore, different brightness needs to be provided for different display areas. Based on this, the embodiment of the present application proposes to divide the backlight module into partitions of different sizes to achieve independent brightness control of partitions of different sizes.

[0033] The first backlight area and the second backlight area may be two areas on the same backplane, or may be two backplanes. The first backlight area is equally divided into a plurality of first sub-partitions, and similarly, the second backlight area is equally divided into a plurality of second sub-partitions, each first sub-partition and each second sub-partition being composed of a plurality of light-emitting diodes. The number of light-emitting diodes contained in a single first sub-partition is greater than the number of light-emitting diodes contained in a single second sub-partition, and therefore, the first sub-partition is larger than the second sub-partition. Exemplarily, a single first sub-partition contains 3 light-emitting diodes, and a single second sub-partition contains 1 light-emitting diode.

[0034] The driving circuit is used to provide a driving voltage to the connected light-emitting diodes. For example, the driving circuit can also be an LED power supply. Since the number of light-emitting diodes in a single first sub-partition is greater than that in a single second sub-partition, when each sub-partition contains multiple light-emitting diodes, the multiple light-emitting diodes are connected in series. Therefore, in order to ensure the lighting requirements of the multiple light-emitting diodes, the first driving voltage provided by the first driving circuit should be greater than or equal to the second driving voltage.

[0035] Referring to FIG2 , the first driving circuit is connected to a plurality of first sub-partitions A1, A2, etc., a single first sub-partition includes three light-emitting diodes connected in series, and the first driving circuit provides a 9-9.6V driving voltage for each light-emitting diode in the first sub-partition. Referring to FIG3 , the second driving circuit is connected to a plurality of second sub-partitions B1, B2, B3, etc., a single second sub-partition includes one light-emitting diode, and the second driving circuit provides a 3-3.2V driving voltage for each light-emitting diode in the second sub-partition. After the backlight module is powered on, the first driving circuit supplies power to each first sub-partition to light up the light-emitting diodes in each first sub-partition; the second driving circuit supplies power to each second sub-partition to light up the light-emitting diodes in each second sub-partition.

[0036] In some embodiments, the driving circuit of the backlight module can only provide a single driving voltage. To ensure that the light-emitting diodes in each sub-partition are lit, the driving circuit should provide a driving voltage required by the first sub-partition, for example, a driving voltage of 9V. Since the driving circuit also provides the same driving voltage for the second sub-partition, the voltage difference of the light-emitting diodes in the second sub-partition will be too large, resulting in low power efficiency and waste of power consumption. In the embodiment of the present application, the first driving voltage is greater than the second driving voltage, which is conducive to saving power consumption while ensuring that each light-emitting diode is lit.

[0037] In the above-mentioned backlight module, the first backlight area and the second backlight area contained in the backlight module are respectively equally divided into a plurality of first sub-partitions and a plurality of second sub-partitions, the plurality of first sub-partitions are respectively connected to the first driving circuit, and the plurality of second sub-partitions are respectively connected to the second driving circuit. Since the number of light-emitting diodes contained in a single first sub-partition is greater than the number of light-emitting diodes contained in a single second sub-partition, that is, the first sub-partition is larger than the second sub-partition, therefore, the first driving voltage provided by the first driving circuit to the first sub-partition is greater than the second driving voltage provided by the second driving circuit to the second sub-partition, which can ensure that the driving voltage meets the working requirements of the light-emitting diodes in each sub-partition, and provides a smaller driving voltage to the sub-partition with a smaller number of light-emitting diodes, which is beneficial to saving power consumption; in addition, after the backlight module is powered on, the first driving circuit supplies power to the first backlight area, and the second driving circuit supplies power to the second backlight area, which can ensure that the light-emitting diodes contained in each sub-partition are lit, and since the light-emitting diodes in the backlight module are divided into sub-partitions of different sizes, it is beneficial to independently adjust the brightness of each sub-partition, thereby realizing fine adjustment of the backlight module.

[0038] In an exemplary embodiment, referring to FIG. 1 , a plurality of first sub-partitions 103 are arranged in sequence in a row direction, a plurality of second sub-partitions 104 are arranged in an array, and each first sub-partition 103 is arranged in the same column as a column of second sub-partitions 104 .

[0039] The plurality of first sub-partitions are arranged in sequence along the row direction, the plurality of second sub-partitions are arranged in an array, and the second sub-partitions in a column are in the same column as a first sub-partition. Thus, the number of columns occupied by the first sub-partitions is equal to the number of columns occupied by the second sub-partitions.

[0040] 1 , each first sub-region includes a plurality of light emitting diodes in a column, and a second sub-region in a column is in the same column as a first sub-region.

[0041] In this embodiment, the first sub-partitions and the second sub-partitions are aligned in columns. In the same column, the number of second sub-partitions is greater than the number of first sub-partitions, that is, the division granularity of the first sub-partitions is finer, which is conducive to fine adjustment of the backlight.

[0042] In an exemplary embodiment, referring to FIG1 , the backlight module further includes a third backlight area 105, the third backlight area 105 is located on a side of the first backlight area 101 away from the second backlight area 102, and the third backlight area 105 is equally divided into a plurality of third sub-areas 106; the plurality of first sub-areas 103 are equally divided into a plurality of groups by row, and the number of the plurality of third sub-areas 106 is the same as the number of the groups of the plurality of first sub-areas 103. The backlight module further includes a third driving circuit respectively connected to the plurality of third sub-areas 106, for providing a third driving voltage to each third sub-area.

[0043] The third backlight area may be on the same backplane as the first backlight area and the second backlight area, or may be a separate backplane. In some embodiments, the backlight module may further include a fourth backlight area, a fifth backlight area, etc., which are respectively located on a side away from the second backlight area. For example, the fourth backlight area is located on a side of the third backlight area away from the second backlight area, the fifth backlight area is located on a side of the fourth backlight area away from the second backlight area, and so on.

[0044] The third backlight area may also be equally divided into a plurality of third sub-areas, and the arrangement of the LEDs in a single third sub-area may be the same as or different from the arrangement of the LEDs in a single first sub-area or a single second sub-area.

[0045] The following description is made by taking the case where the arrangement of the LEDs in a single third sub-region is different from the arrangement of the LEDs in a single first sub-region and a single second sub-region as an example.

[0046] Referring to FIG1 , three first sub-regions are equally divided into a group by row, and each group of first sub-regions corresponds to a third sub-region. In this way, the number of light-emitting diodes included in each third sub-region can be equal to the number of columns of each group of second sub-regions. For example, each group of second sub-regions includes 3 columns, and the third sub-region includes 3 light-emitting diodes.

[0047] The third driving circuit is connected to the plurality of third sub-partitions, and is used to provide a third driving voltage to each third sub-partition. In some embodiments, the number of light-emitting diodes included in a single first sub-partition is equal to the number of light-emitting diodes included in a single third sub-partition, then the first driving voltage can be equal to the third driving voltage, and the third sub-partition can share the first driving circuit with the first sub-partition. Referring to FIG2 , the first driving circuit is connected to a plurality of first sub-partitions A1, A2, etc., and to a plurality of third sub-partitions C1, C2, etc., a single third sub-partition contains 3 light-emitting diodes connected in series, and the first driving circuit provides a 9-9.6V driving voltage to the light-emitting diodes in each first sub-partition and each third sub-partition.

[0048] In this embodiment, the backlight module also includes a third backlight area, and each third sub-partition in the third backlight area is equally divided into rows, and the number of third sub-partitions is the same as the number of groups in the first sub-partitions. This arrangement of sub-partitions is conducive to independent brightness control of the light-emitting diodes in each sub-partition; when the number of light-emitting diodes contained in the third sub-partition and the first sub-partition is the same, the driving circuit can be shared, which is conducive to cost saving.

[0049] In an exemplary embodiment, the first driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single first sub-region.

[0050] Among them, since the first sub-partition may include multiple light-emitting diodes connected in series, in order to ensure that the driving circuit can light up all the light-emitting diodes in the first sub-partition, it should be ensured that the first driving voltage is greater than or equal to the product of the rated voltage of a single light-emitting diode and the number of light-emitting diodes included in the single first sub-partition.

[0051] In some embodiments, setting the first driving voltage equal to the product of the rated voltage of a single light-emitting diode and the number of light-emitting diodes included in a single first sub-region is conducive to avoiding waste of power consumption. For example, the rated voltage of a single light-emitting diode is 3V, and a single first sub-region includes 3 light-emitting diodes, so the first driving voltage can be set to 9V. If the first driving voltage is set to 12V, it will lead to waste of power consumption.

[0052] In this embodiment, the first driving voltage is set to be the product of the rated voltage of a single light emitting diode and the number of light emitting diodes included in a single first sub-region, which can avoid power consumption waste caused by excessive driving voltage.

[0053] In an exemplary embodiment, the second driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single second sub-region.

[0054] Among them, since the second sub-partition may include one or more light-emitting diodes connected in series, in order to ensure that the driving circuit can light up all the light-emitting diodes in the second sub-partition, it should be ensured that the second driving voltage is greater than or equal to the product of the rated voltage of a single light-emitting diode and the number of light-emitting diodes included in the single second sub-partition.

[0055] In some embodiments, the second sub-region and the first sub-region include the same number of light-emitting diodes, and the first driving voltage may be equal to the second driving voltage.

[0056] In some embodiments, setting the second driving voltage equal to the product of the rated voltage of a single light-emitting diode and the number of light-emitting diodes included in a single second sub-region is conducive to avoiding waste of power consumption. For example, the rated voltage of a single light-emitting diode is 3V, and a single second sub-region includes 1 light-emitting diode, so the second driving voltage can be set to 3V. If the first driving voltage is set equal to the second driving voltage, that is, 9V, it will lead to waste of power consumption.

[0057] In some embodiments, the third driving voltage is a product of a rated voltage of a single LED and the number of LEDs included in a single third sub-region.

[0058] In this embodiment, the second driving voltage is set to the product of the rated voltage of a single light emitting diode and the number of light emitting diodes included in a single second sub-region, which can avoid power consumption waste caused by excessive driving voltage.

[0059] In an exemplary embodiment, the first backlight area is used to illuminate the first application display area in the display panel, which is used to display first application information, and the second backlight area is used to illuminate the status display area in the display panel, which is used to normally display status information.

[0060] The display panel may include multiple display areas, which may be located in the same display panel or in multiple display panels. FIG4 is a schematic diagram of the partition division of a display panel in an embodiment. The display panel includes a first application display area 107 and a status display area 108.

[0061] The first backlight area of ​​the backlight module vertically projects and covers the first application display area, so that the first backlight area can be used to illuminate the first application display area in the display panel. The second backlight area of ​​the backlight module vertically projects and covers the status display area, so that the second backlight area can be used to illuminate the status display area in the display panel.

[0062] In some embodiments, different display areas can display different applications. Since the granularity of the sub-divisions of the status display area is small, it can be used to display information that requires fine adjustment, and the granularity of the sub-divisions of the first application display area is large, it can be used to display information that requires rough adjustment. For example, in the HUD / AR-HUD scenario, the first application information can be navigation information, and the status information can include vehicle speed information, speed limit information, direction information, etc.

[0063] Normal display means that the backlight module is always displayed after being powered on. In some embodiments, the state information can be normal information, and the first application information can be displayed normally, or displayed at a time when it is needed according to demand.

[0064] In this embodiment, each backlight area in the backlight module corresponds one-to-one to each display area in the display panel, so that the backlight area can light up the corresponding display area; each display area can display different information as needed and adopt different display methods, thereby improving the flexibility of display control.

[0065] In an exemplary embodiment, the third backlight area is used to illuminate the second application display area in the display panel, the second application display area is used to display second application information, and the first application information and the second application information are information of different applications respectively.

[0066] The display panel may further include a second application display area, which may be located in the same display panel as the first application display area and the status display area, or may be located in multiple display panels. Referring to FIG5 , the display panel further includes a second application display area 109. As can be seen from the figure, the partitioning method of the display panel is consistent with the partitioning method of the backlight module, and each backlight area in the backlight module corresponds to each display area in the display panel.

[0067] The third backlight area of ​​the backlight module is vertically projected to cover the second application display area, so that the second backlight area can be used to illuminate the second application display area in the display panel.

[0068] In some embodiments, the second application display area is used to display second application information, and the second application information and the first application information may be information of the same application or different applications. For example, the second application information may include traffic condition information, weather condition information, etc. around the vehicle.

[0069] In this embodiment, the third backlight area in the backlight module corresponds to the second application display area in the display panel, and can light up the second application display area. The second application display area can display second application information different from the first application information, thereby increasing the information display range. The display content of each display area can be flexibly adjusted according to needs, which is conducive to improving the user experience.

[0070] In an exemplary embodiment, the backlight module also includes a brightness adjustment unit; the brightness adjustment unit includes multiple first switches and multiple second switches; the multiple first switches are respectively connected to the multiple first sub-partitions, and are used to adjust the brightness of the light-emitting diodes in the connected first sub-partitions; the multiple second switches are respectively connected to the multiple second sub-partitions, and are used to adjust the brightness of the light-emitting diodes in the connected second sub-partitions.

[0071] Among them, the brightness adjustment unit is a module for adjusting the brightness of the light-emitting diodes in the backlight module. The brightness adjustment unit includes multiple switches. By controlling the on-off time of the multiple switches, the brightness of the light-emitting diodes in the backlight module can be controlled, whereby the picture of the LCD display device can be received or shielded by the human eye, thereby generating different picture brightness. For example, the brightness adjustment module is a module based on PWM drive technology. As shown in Figure 6, it is a schematic diagram of the brightness adjustment module performing brightness adjustment in an embodiment. Among them, when the brightness adjustment module outputs a high level, the connected light-emitting diode (LED) lights up, and when the brightness adjustment module outputs a low level, the connected light-emitting diode goes out.

[0072] In some embodiments, the brightness adjustment switch includes a plurality of first switches and a plurality of second switches. Since the plurality of first switches are connected to the plurality of first sub-partitions in a one-to-one correspondence, the plurality of first switches can be used to adjust the brightness of the light-emitting diodes in the connected first sub-partitions. Similarly, since the plurality of second switches are connected to the plurality of second sub-partitions in a one-to-one correspondence, and the plurality of third switches are connected to the plurality of third sub-partitions in a one-to-one correspondence, the plurality of second switches can be used to adjust the brightness of the light-emitting diodes in the connected second sub-partitions, and the plurality of third switches can be used to adjust the brightness of the light-emitting diodes in the connected third sub-partitions.

[0073] In this embodiment, the brightness adjustment unit is connected to multiple first sub-partitions through multiple first switches, and is respectively connected to multiple second sub-partitions through multiple second switches, so as to realize independent brightness control of the light-emitting diodes in each sub-partition; since the number of light-emitting diodes contained in each sub-partition is different, the brightness of the backlight module can be finely adjusted.

[0074] The brightness adjustment method of the backlight module provided in the embodiment of the present application is applied to the backlight module shown in FIG1. ​​The brightness adjustment method of the backlight module can be executed by a terminal. After the backlight module is powered on, power is supplied to the first backlight area through the first driving circuit so that the light-emitting diodes contained in each of the plurality of first sub-areas in the first backlight area are lighted; power is supplied to the second backlight area through the second driving circuit so that the light-emitting diodes contained in each of the plurality of second sub-areas in the second backlight area are lighted.

[0075] Among them, since the first driving circuit is used to provide a first driving voltage to multiple first sub-partitions in the first backlight area, and the second driving circuit is used to provide a second driving voltage to multiple second sub-partitions in the second backlight area, after the backlight module is powered on, the first driving circuit and the second driving circuit respectively supply power to the first backlight area and the second backlight area, thereby lighting up each light-emitting diode.

[0076] In some embodiments, after the backlight module is powered on, power is supplied to the third backlight area through the third driving circuit, so that the light-emitting diodes included in each of the plurality of third sub-areas in the third backlight area are lit.

[0077] In the above-mentioned backlight module and the brightness adjustment method thereof, the first backlight area and the second backlight area contained in the backlight module are respectively equally divided into a plurality of first sub-areas and a plurality of second sub-areas, the plurality of first sub-areas are respectively connected to the first driving circuit, and the plurality of second sub-areas are respectively connected to the second driving circuit. Since the number of light-emitting diodes contained in a single first sub-area is greater than the number of light-emitting diodes contained in a single second sub-area, that is, the first sub-area is larger than the second sub-area, therefore, the first driving voltage provided by the first driving circuit to the first sub-area is greater than the second driving voltage provided by the second driving circuit to the second sub-area, which can ensure that the driving voltage meets the working requirements of the light-emitting diodes in each sub-area, and provides a smaller driving voltage to the sub-area with a smaller number of light-emitting diodes, which is beneficial to saving power consumption; in addition, after the backlight module is powered on, the first driving circuit supplies power to the first backlight area, and the second driving circuit supplies power to the second backlight area, which can ensure that the light-emitting diodes contained in each sub-area are lit. Since the light-emitting diodes in the backlight module are divided into sub-areas of different sizes, it is beneficial to independently adjust the brightness of each sub-area, thereby realizing fine adjustment of the backlight module.

[0078] In an exemplary embodiment, the brightness adjustment method of the backlight module also includes: obtaining a first brightness requirement of a single first sub-partition and a second brightness requirement of a single second sub-partition; determining a first switching duration according to the first brightness requirement, and determining a second switching duration according to the second brightness requirement; switching control of multiple first switches in the brightness adjustment unit that are respectively connected to multiple first sub-partitions according to the first switching duration, and switching control of multiple second switches in the brightness adjustment unit that are respectively connected to multiple second sub-partitions according to the second switching duration.

[0079] Since each sub-area is connected to each switch in the brightness adjustment unit, the brightness of each sub-area can be controlled separately. The first brightness requirement refers to the brightness requirement for a single first sub-area, and the second brightness requirement refers to the brightness requirement for a single second sub-area.

[0080] Different brightness requirements can be determined by the switching duration of the corresponding switch in the brightness adjustment unit. In some embodiments, the terminal pre-stores a mapping relationship between brightness requirements and switching durations. By searching the mapping relationship, the first switching duration corresponding to the first brightness requirement and the second switching duration corresponding to the second brightness requirement can be determined.

[0081] For example, the first switch duration and the second switch duration can be represented by the duty cycle of PWM. The first switch duration includes the on duration of the first switch and the off duration of the first switch, and the second switch duration includes the on duration of the second switch and the off duration of the second switch. For example, in a PWM control cycle, the on duration of the first switch accounts for 70%, and the off duration of the first switch accounts for 30%. For another example, in a PWM control cycle, the on duration of the second switch accounts for 60%, and the off duration of the second switch accounts for 40%.

[0082] The terminal controls the first switch by the first switch duration, thereby controlling the brightness of the light-emitting diode in the first sub-area connected to the first switch to meet the first brightness requirement. Similarly, the terminal controls the second switch by the second switch duration, thereby controlling the brightness of the light-emitting diode in the second sub-area connected to the second switch to meet the second brightness requirement.

[0083] In some embodiments, the terminal also obtains a third brightness requirement of a single third sub-partition; determines a third switch duration based on the third brightness requirement; and controls multiple third switches in the brightness adjustment unit that are respectively connected to multiple third sub-partitions based on the third switch duration, thereby achieving brightness control of light-emitting diodes in the third sub-partition connected to the third switch to meet the third brightness requirement.

[0084] In this embodiment, the brightness requirements of each sub-partition are determined and the corresponding switching duration is determined, so that the corresponding switch is controlled according to the switching duration to achieve brightness control of the light-emitting diode in the corresponding backlight module. This brightness control method can meet the different brightness requirements of different sub-partitions and achieve fine adjustment of the backlight module.

[0085] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0086] Based on the same inventive concept, the embodiment of the present application also provides a brightness adjustment device for implementing the brightness adjustment method of the backlight module involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more brightness adjustment device embodiments provided below can refer to the limitations of the brightness adjustment method above, and will not be repeated here.

[0087] In an exemplary embodiment, a brightness adjustment device is provided, including a lighting module, which is used to supply power to the first backlight area through a first driving circuit after the backlight module is powered on, so that the light-emitting diodes contained in each of the multiple first sub-partitions in the first backlight area are lit; and supply power to the second backlight area through a second driving circuit, so that the light-emitting diodes contained in each of the multiple second sub-partitions in the second backlight area are lit.

[0088] In one embodiment, the brightness adjustment device also includes an adjustment module, which is used to obtain a first brightness requirement of a single first sub-partition and a second brightness requirement of a single second sub-partition; determine a first switch duration according to the first brightness requirement, and determine a second switch duration according to the second brightness requirement; control the switching of multiple first switches in the brightness adjustment unit that are respectively connected to multiple first sub-partitions according to the first switch duration, and control the switching of multiple second switches in the brightness adjustment unit that are respectively connected to multiple second sub-partitions according to the second switch duration.

[0089] In the above-mentioned backlight module and the brightness adjustment device thereof, the first backlight area and the second backlight area contained in the backlight module are respectively equally divided into a plurality of first sub-areas and a plurality of second sub-areas, the plurality of first sub-areas are respectively connected to the first driving circuit, and the plurality of second sub-areas are respectively connected to the second driving circuit. Since the number of light-emitting diodes contained in a single first sub-area is greater than the number of light-emitting diodes contained in a single second sub-area, that is, the first sub-area is larger than the second sub-area, therefore, the first driving voltage provided by the first driving circuit to the first sub-area is greater than the second driving voltage provided by the second driving circuit to the second sub-area, which can ensure that the driving voltage meets the working requirements of the light-emitting diodes in each sub-area, and provides a smaller driving voltage to the sub-area with a smaller number of light-emitting diodes, which is beneficial to saving power consumption; in addition, after the backlight module is powered on, the first driving circuit supplies power to the first backlight area, and the second driving circuit supplies power to the second backlight area, which can ensure that the light-emitting diodes contained in each sub-area are lit. Since the light-emitting diodes in the backlight module are divided into sub-areas of different sizes, it is beneficial to independently adjust the brightness of each sub-area, thereby realizing fine adjustment of the backlight module.

[0090] Each module in the above brightness adjustment device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0091] In an exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG7. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface, the display unit, and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner may be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a brightness adjustment method of a backlight module is implemented. The display unit of the computer device is used to form a visually visible picture, which may be a display area, a projection device, or a virtual reality imaging device. The display area can be a liquid crystal display area or an electronic ink display area, and the input device of the computer device can be a touch layer covering the display area, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0092] Those skilled in the art will understand that the structure shown in FIG. 7 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0093] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0094] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0095] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0096] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0097] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0098] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0099] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A backlight module, characterized in that: The backlight module comprises: a first backlight area and a second backlight area, wherein the first backlight area is equally divided into a plurality of first sub-areas, the second backlight area is equally divided into a plurality of second sub-areas, and the number of light-emitting diodes contained in a single first sub-area is greater than the number of light-emitting diodes contained in a single second sub-area; The backlight module also includes a first driving circuit connected to the multiple first sub-partitions respectively, for providing a first driving voltage to each first sub-partition; the backlight module also includes a second driving circuit connected to the multiple second sub-partitions respectively, for providing a second driving voltage to each second sub-partition, and the first driving voltage is greater than the second driving voltage.

2. The backlight module according to claim 1, characterized in that: The plurality of first sub-partitions are arranged in sequence along a row direction, the plurality of second sub-partitions are arranged in an array, and each first sub-partition is arranged in the same column as a column of second sub-partitions.

3. The backlight module according to claim 2, characterized in that: The backlight module also includes a third backlight area, which is located on a side of the first backlight area away from the second backlight area, and the third backlight area is equally divided into a plurality of third sub-areas; the plurality of first sub-areas are equally divided into a plurality of groups by row, and the number of the plurality of third sub-areas is the same as the number of groups of the plurality of first sub-areas, and the backlight module also includes a third driving circuit respectively connected to the plurality of third sub-areas, for providing a third driving voltage to each third sub-area.

4. The backlight module according to claim 1, characterized in that: The first driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single first sub-region.

5. The backlight module according to claim 1, characterized in that: The second driving voltage is a product of a rated voltage of a single light emitting diode and the number of light emitting diodes included in a single second sub-region.

6. The backlight module according to claim 1, characterized in that: The first backlight area is used to illuminate a first application display area in the display panel, and the first application display area is used to display first application information. The second backlight area is used to illuminate a status display area in the display panel, and the status display area is used for normal display of status information.

7. The backlight module according to claim 3, characterized in that: The third backlight area is used to illuminate a second application display area in the display panel, and the second application display area is used to display second application information. The first application information and the second application information are information of different applications respectively.

8. The backlight module according to claim 1, characterized in that: The backlight module further includes a brightness adjustment unit; the brightness adjustment unit includes a plurality of first switches and a plurality of second switches; the plurality of first switches are respectively connected to the plurality of first sub-partitions, and are used to adjust the brightness of the light-emitting diodes in the connected first sub-partitions; The plurality of second switches are respectively connected to the plurality of second sub-regions and are used to adjust the brightness of the light-emitting diodes in the connected second sub-regions.

9. A method for adjusting the brightness of a backlight module, applied to the backlight module according to any one of claims 1 to 8, characterized in that: The method comprises: After the backlight module is powered on, power is supplied to the first backlight area through the first driving circuit so that the light-emitting diodes contained in each of the multiple first sub-partitions in the first backlight area are lighted; power is supplied to the second backlight area through the second driving circuit so that the light-emitting diodes contained in each of the multiple second sub-partitions in the second backlight area are lighted.

10. The method according to claim 9, characterized in that The method further comprises: Acquire a first brightness requirement of a single first sub-region and a second brightness requirement of a single second sub-region; Determine a first switching duration according to the first brightness requirement, and determine a second switching duration according to the second brightness requirement; The plurality of first switches in the brightness adjustment unit respectively connected to the plurality of first sub-partitions are controlled on-off according to the first switching duration, and the plurality of second switches in the brightness adjustment unit respectively connected to the plurality of second sub-partitions are controlled on-off according to the second switching duration.

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