Driving circuit and display

Abstract

The application discloses a driving circuit and a display. The driving circuit comprises a switching module, a backlight module comprising a plurality of backlight sub-zones, and a power supply module corresponding to each backlight sub-zone. The power supply module is configured to output a power supply voltage to the switching module. The switching module is configured to alternately transmit the power supply voltage to the corresponding backlight sub-zone of the backlight module. The backlight module is configured to display when receiving each power supply voltage. Since the switching module alternately transmits the power supply voltage of each power supply module to the backlight sub-zone, each backlight sub-zone can alternately receive all power supply voltages. Compared with the prior art that one backlight sub-zone corresponds to one power supply, all power supply modules can alternately supply power to one backlight sub-zone, thereby reducing the brightness difference of each backlight sub-zone, reducing the degree of mura phenomenon at a low gray scale, and improving the display effect.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a driving circuit and a display. Background Technology

[0002] Currently, Mini LED (Light Emitting Diode) backlit liquid crystal displays (LCDs) are widely used in the market compared to traditional LCDs due to their higher contrast and brightness as well as energy saving.

[0003] However, in order to improve the image quality and contrast of LCDs, most LCDs divide the backlight into multiple areas and adjust the brightness of each area independently. These areas can be called backlight zones. However, due to the slight differences in the LED chips of different backlight zones and the differences in the power supply, the voltage received by different backlight zones will be different, resulting in different brightness. This will cause severe mura (brightness unevenness) at low gray levels and poor display effect.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a driving circuit and a display that addresses the technical problem in the prior art where slight differences in the LED chips of different backlight zones and differences in the power supply lead to different voltages received by different backlight zones, resulting in poor display effects.

[0006] To achieve the above objectives, the present invention proposes a driving circuit, the driving circuit comprising: a switching module, a backlight module including a plurality of backlight zones, and a power supply module corresponding to each of the backlight zones;

[0007] The switching module is connected to each of the power supply modules and each of the backlight zones respectively;

[0008] The power supply module is used to output the power supply voltage and transmit it to the switching module;

[0009] The switching module is used to alternately transmit the power supply voltage to the corresponding backlight partition on the backlight module;

[0010] The backlight module is used to display when it receives each of the power supply voltages.

[0011] Optionally, the switching module includes: a plurality of switching units;

[0012] The number of switching units is the same as the number of power supply modules, each switching unit is connected to each power supply module, and each switching unit is also connected to the corresponding backlight zone.

[0013] The switching unit is used to alternately transmit the power supply voltage to the corresponding backlight partition.

[0014] Optionally, the switching unit includes: a data selector;

[0015] The voltage input terminals of the data selector are connected to the corresponding power supply module, and the voltage output terminal of the data selector is connected to the corresponding backlight zone.

[0016] Optionally, the drive circuit further includes: a control module;

[0017] The control module is connected to the switching module;

[0018] The control module is used to generate a switching signal according to a preset power supply sequence table and transmit the switching signal to the switching module.

[0019] The switching module is also used to alternately transmit each of the power supply voltages to each of the backlight zones according to the switching signal.

[0020] Optionally, the control module is further configured to acquire quantity information of the power supply modules and determine the power supply stage based on the quantity information;

[0021] The control module is also used to generate a cycle stage based on the power supply stage, and to construct a preset power supply sequence table based on the cycle stage.

[0022] Optionally, the control module is further configured to select a target power supply module for each backlight zone in each power supply stage from the power supply modules, wherein the target power supply modules corresponding to each backlight zone are different in the same power supply stage;

[0023] The control module is also used to generate a cycle phase based on each of the target power supply modules.

[0024] Optionally, each of the power supply modules is in the loop phase corresponding to each of the backlight zones.

[0025] Optionally, the control module is further configured to obtain the initial power supply module corresponding to each of the backlight zones, and use each of the initial power supply modules as the target power supply module for each of the backlight zones in the initial power supply stage;

[0026] The control module is further configured to reorder the target power supply modules in the initial power supply stage, and determine the target power supply modules of each backlight zone in the remaining power supply stage based on the reordering results.

[0027] Optionally, the control module is further configured to acquire the brightness acquisition results of each of the backlight zones, wherein the brightness acquisition results are obtained by supplying power to each of the backlight zones according to the corresponding target power supply module;

[0028] The control module is further configured to determine the brightness variance of each backlight zone based on the acquisition results, and to determine the target power supply module of each backlight zone in the remaining power supply stage from each re-sorting result based on the brightness variance.

[0029] In addition, to achieve the above objectives, the present invention also provides a display comprising the driving circuit described above.

[0030] This invention provides a driving circuit and a display. The driving circuit includes: a switching module, a backlight module comprising a plurality of backlight zones, and a power supply module corresponding to each of the backlight zones. The switching module is connected to each of the power supply modules and each of the backlight zones. The power supply module outputs a power supply voltage to the switching module. The switching module alternately transmits the power supply voltage to the corresponding backlight zone on the backlight module. The backlight module displays the image upon receiving each of the power supply voltages. Because this invention alternately transmits the power supply voltage from each power supply module to the backlight zones via the switching module, each backlight zone can alternately receive all the power supply voltages. Compared to the existing method where one backlight zone corresponds to one power supply, this invention can alternately supply power to one backlight zone by all power supply modules, thereby reducing the brightness difference between the backlight zones, reducing the degree of mura (brightness unevenness) at low grayscale levels, and improving the display effect. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of traditional backlight zone power supply;

[0033] Figure 2 This is a structural block diagram of the driving circuit in Embodiment 1 of the present invention;

[0034] Figure 3 This is a structural block diagram of the switching module in Embodiment 1 of the present invention;

[0035] Figure 4 This is a circuit diagram of the switching unit in Embodiment 1 of the present invention;

[0036] Figure 5 This is a schematic diagram of the driving circuit in Embodiment 2 of the present invention;

[0037] Figure 6 This is a schematic diagram of the backlight zone receiving voltage in Embodiment 2 of the present invention.

[0038] Explanation of icon numbers:

[0039]

[0040] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0042] It should be noted that, currently, Mini LED backlit LCDs are widely used in the market compared to traditional LCDs due to their advantages of higher contrast and brightness as well as energy saving.

[0043] However, in order to improve the image quality and contrast of LCDs, most LCDs divide the backlight into multiple areas and adjust the brightness of each area independently. These areas can be called backlight zones. However, due to the slight differences in the LED chips of different backlight zones and the differences in the power supply, the voltage received by different backlight zones will be different, resulting in different brightness. This will cause severe mura (brightness unevenness) at low gray levels and poor display effect.

[0044] For ease of understanding, please refer to Figure 1 , Figure 1 A schematic diagram of traditional backlight zone power supply, such as Figure 1 As shown, taking four backlight zones as an example, denoted as the first backlight zone 21 to the fourth backlight zone 24 respectively, each backlight zone can be equipped with a number of light-emitting diodes (LEDs) for display. This embodiment uses four LEDs for illustration, but this is not a limitation. Figure 1 The first backlight zone 21 contains the first to fourth light-emitting diodes (LED4), the second backlight zone 22 contains the fifth to eighth light-emitting diodes (LED8), the third backlight zone 23 contains the ninth to twelfth light-emitting diodes (LED12), and the fourth backlight zone 24 contains the thirteenth to sixteenth light-emitting diodes (LED16).

[0045] It should also be noted that traditionally, each backlight zone is equipped with a power supply. Continuing... Figure 1 As shown, the first backlight zone 21 can be supplied by a first power source (i.e., Figure 1 Power is supplied to A12 and K12, that is, for the first backlight zone 21, the anode of the first light-emitting diode LED1 is connected to the anode of the third light-emitting diode LED3 and the first output terminal of the first power supply (i.e., Figure 1 The cathode of the first LED (LED1) is connected to the anode of the second LED (LED2), and the cathode of the second LED (LED2) is connected to the cathode of the fourth LED (LED4) and the second output terminal of the first power supply (i.e., A12). Figure 1 Connect K12), and connect the cathode of the third LED3 to the anode of the fourth LED4;

[0046] Similarly, for the second backlight zone 22, it can be powered by the second power supply (i.e., Figure 1 Power is supplied to A22 and K22, that is, for the second backlight zone 22, the anode of the fifth light-emitting diode LED5 is connected to the anode of the seventh light-emitting diode LED7 and the first output terminal of the second power supply (i.e., Figure 1 The cathode of the fifth LED (LED5) is connected to the anode of the sixth LED (LED6), and the cathode of the sixth LED (LED6) is connected to the cathode of the eighth LED (LED8) and the second output terminal of the second power supply (i.e., ...). Figure 1 Connect K22) and connect the cathode of the seventh LED7 to the anode of the eighth LED8;

[0047] Similarly, for the fourth backlight zone 24, it can be powered by the fourth power supply (i.e. Figure 1 Power is supplied to A11 and K11, that is, for the fourth backlight zone 24, the anode of the ninth light-emitting diode LED9 is connected to the anode of the eleventh light-emitting diode LED11 and the first output terminal of the fourth power supply (i.e., Figure 1 The cathode of the ninth LED (LED9) is connected to the anode of the tenth LED (LED10), and the cathode of the tenth LED (LED10) is connected to the cathode of the twelfth LED (LED12) and the second output terminal of the fourth power supply (i.e., A11). Figure 1 Connect K11), and connect the cathode of the eleventh LED to the anode of the twelfth LED.

[0048] Similarly, for the third backlight zone 23, it can be powered by the third power supply (i.e. Figure 1Power is supplied to A21 and K21, that is, for the third backlight zone 23, the anode of the thirteenth light-emitting diode LED13 is connected to the anode of the fifteenth light-emitting diode LED15 and the first output terminal of the third power supply (i.e., Figure 1 The cathode of the thirteenth LED (LED13) is connected to the anode of the fourteenth LED (LED14), and the cathode of the fourteenth LED (LED14) is connected to the cathode of the sixteenth LED (LED16) and the second output terminal of the third power supply (i.e., ...). Figure 1 Connect K21), and connect the cathode of the fifteenth LED15 to the anode of the sixteenth LED16.

[0049] Because the power supply to each backlight zone is different, the brightness of each backlight zone is different, which leads to severe mura at low gray levels and poor display effect.

[0050] Therefore, to address the aforementioned shortcomings, embodiments of the present invention provide a driving circuit comprising: a switching module 1, a backlight module 2 including a plurality of backlight zones, and a power supply module corresponding to each backlight zone. The switching module 1 alternately transmits the power supply voltage from each power supply module to the backlight zones, thereby ensuring that each backlight zone can alternately receive all power supply voltages. Compared to the existing method where one backlight zone corresponds to one power supply, this embodiment can alternately supply power to one backlight zone, thereby reducing the brightness differences between backlight zones, thus reducing the degree of mura phenomenon at low grayscale levels and improving the display effect.

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0052] Example 1

[0053] Reference Figures 2 to 4 An embodiment of the driving circuit of the present invention is presented.

[0054] Reference Figure 2 , Figure 2 This is a structural block diagram of the driving circuit in Embodiment 1 of the present invention; as shown... Figure 2 As shown, in this embodiment, the driving circuit includes: a switching module 1, a backlight module 2 including a plurality of backlight zones, and a power supply module corresponding to each of the backlight zones; wherein, the switching module 1 is connected to each of the power supply modules and each of the backlight zones respectively.

[0055] It should be noted that, due to the above Figure 1 Since there are four backlight zones, this embodiment will still use four backlight zones as an example for explanation. Figure 2The first backlight partition 21 to the fourth backlight partition 24 in the middle backlight module 2, and therefore, the power supply module in this embodiment is also 4, that is... Figure 2 The first power supply module 31 (corresponding to) Figure 1 First power supply), second power supply module 32 (corresponding to) Figure 1 Second power supply), third power supply module 33 (corresponding to) Figure 1 The third power supply module and the fourth power supply module 34 (corresponding to) Figure 1 (The fourth power supply in China).

[0056] The power supply module is used to output the power supply voltage and transmit it to the switching module 1;

[0057] The switching module 1 is used to alternately transmit the power supply voltage to the corresponding backlight partition on the backlight module 2;

[0058] The backlight module 2 is used to display when it receives each of the power supply voltages.

[0059] It should be understood that the power supply voltage provided by the power supply modules in this embodiment may be inconsistent. The switching module 1 can be connected to each power supply module and each backlight zone respectively. In actual display, for the first backlight zone 21, it can be powered alternately by the first power supply module 31 to the fourth power supply module 34. That is, after the first power supply module 31 powers the zone for a period of time, the second power supply module 32 powers the zone for a period of time, then the third power supply module 33 powers the zone for a period of time, and finally the fourth power supply module 34 powers the zone for a period of time, and then the first power supply module 31 powers the zone again. This cycle repeats. Similarly, for the second backlight zone 22 to the fourth backlight zone 24, it can also be powered alternately by the first power supply module 31 to the fourth power supply module 34 respectively.

[0060] It should be emphasized that the order of alternating power supply and the power supply duration of each power supply module can be set according to the actual situation. This embodiment does not impose any restrictions on this. Furthermore, in order to facilitate switching, the switching module 1 can be composed of a data selector. Of course, it can also be composed of other devices with similar functions. This embodiment does not impose any restrictions on this.

[0061] It should also be emphasized that since there are more than four backlight zones in an LCD, before actual display, the backlight zones can be grouped according to a certain number, such as three, four or five, to form the backlight module 2. The number of backlight zones in each backlight module 2 can be different. Each backlight module 2 is equipped with a switching module 1 for individual switching. Thus, during display, each switching module 1 can control the corresponding power supply module to alternately supply power to the backlight zones in each backlight module 2.

[0062] In the specific implementation, since each backlight zone in this embodiment can receive the voltage provided by all power supply modules, the brightness difference between each backlight zone is reduced, thereby reducing the degree of mura phenomenon under low grayscale and improving the display effect.

[0063] Furthermore, to facilitate control of each backlight zone, this embodiment can be configured with several switching units to control each backlight zone individually, as shown in the reference. Figure 3 , Figure 3 This is a structural block diagram of the switching module 1 in Embodiment 1 of the present invention;

[0064] like Figure 3 As shown, in this embodiment, the switching module 1 includes: a plurality of switching units (i.e. Figure 3 (From the first switching unit 11 to the fourth switching unit 14);

[0065] The number of switching units is the same as the number of power supply modules, each switching unit is connected to each power supply module, and each switching unit is also connected to the corresponding backlight zone.

[0066] The switching unit is used to alternately transmit the power supply voltage to the corresponding backlight partition.

[0067] It is understood that the number of the above-mentioned switching units can be the same as the number of power supply modules. In this embodiment, four units are used for illustration, namely, the first switching unit 11 is connected to the first backlight partition 21, the second switching unit 12 is connected to the second backlight partition 22, the third switching unit 13 is connected to the third backlight partition 23, and the fourth switching unit 14 is connected to the fourth backlight partition 24.

[0068] Since the switching unit is connected to each power supply module and each switching unit is connected to the corresponding backlight zone, the corresponding backlight zone can receive the power supply voltage provided by each power supply module. For example, taking the first backlight zone 21 as an example, the first switching unit 11 can sequentially transmit the power supply voltage provided by the first power supply module 31 to the fourth power supply module 34 to the first backlight zone 21.

[0069] Furthermore, in this embodiment, the switching unit may include a data selector;

[0070] The voltage input terminals of the data selector are connected to the corresponding power supply module, and the voltage output terminal of the data selector is connected to the corresponding backlight zone.

[0071] As one implementation, since there are four power supply modules, and each power supply module can have a positive output terminal and a negative output terminal, the above-mentioned data selector can be an 8-to-2 data selector, that is, the eight voltage input terminals of the 8-to-2 data selector are respectively connected to the four power supply modules, and the two voltage output terminals are both connected to the backlight partitions; for example, taking the first backlight partition 21 as an example, one voltage output terminal can be connected to the anode of the third light-emitting diode LED3, and one voltage output terminal can be connected to the cathode of the fourth light-emitting diode LED4.

[0072] As another implementation, this embodiment can also use two 4-to-1 data selectors in one switching unit. For ease of understanding, refer to... Figure 4 , Figure 4 The circuit diagram of the switching unit in Embodiment 1 of the present invention is shown below. Figure 4 As shown, the first switching unit 11 may include a first data selector N1 and a second data selector N2, the second switching unit 12 may include a third data selector N3 and a fourth data selector N4, the third switching unit 13 may include a fifth data selector N5 and a sixth data selector N6, and the fourth switching unit 14 may include a seventh data selector N7 and an eighth data selector N8.

[0073] Among them, the first to eighth data selectors N8 can all be 4-to-1 data selectors, and the first voltage input terminal of the first data selector N1 can be connected to the first output terminal of the first power supply module 31 (i.e., Figure 4 The second voltage input terminal of the first data selector N1 can be connected to the first output terminal of the second power supply module 32 (i.e., A11). Figure 4 The third voltage input terminal of the first data selector N1 can be connected to the first output terminal of the third power supply module 33 (i.e., A12). Figure 4 The fourth voltage input terminal of the first data selector N1 can be connected to the first output terminal of the fourth power supply module 34 (i.e., A21). Figure 4 Connect A22) to the voltage output terminal of the first data selector N1 (i.e., Figure 4 Y1) can be connected to the anode of the third light-emitting diode LED3;

[0074] The first voltage input terminal of the second data selector N2 can be connected to the second output terminal of the first power supply module 31 (i.e., Figure 4 The second voltage input terminal of the second data selector N2 can be connected to the second output terminal of the second power supply module 32 (i.e., K11). Figure 4 The third voltage input terminal of the second data selector N2 can be connected to the second output terminal of the third power supply module 33 (i.e., K12). Figure 4 The fourth voltage input terminal of the second data selector N2 can be connected to the second output terminal of the fourth power supply module 34 (i.e., K21). Figure 4 Connect K22) to the voltage output terminal of the second data selector N2 (i.e. Figure 4 Y2 can be connected to the fourth light-emitting diode LED4.

[0075] Similarly, for the third data selector N3, the fifth data selector N5, and the seventh data selector N7, all four of their voltage input terminals are connected to the first output terminals of the four power supply modules, and one of their voltage output terminals can be connected to the anode of the light-emitting diode in the corresponding backlight zone. For the fourth data selector N4, the sixth data selector N6, and the eighth data selector N8, all four of their voltage input terminals are connected to the second output terminals of the four power supply modules, and one of their voltage output terminals can be connected to the cathode of the light-emitting diode in the corresponding backlight zone.

[0076] In the specific implementation, by controlling the conduction of each data selector, the power supply voltage provided by each power supply module is transmitted to each backlight zone in sequence, so that each backlight zone can receive each power supply voltage in sequence, reducing the brightness difference. Compared with the existing method where one backlight zone corresponds to one power supply, this embodiment can reduce the degree of mura phenomenon under low grayscale and improve the display effect.

[0077] Example 2

[0078] Reference Figure 5 and Figure 6 A second embodiment of the driving circuit of the present invention is presented.

[0079] Reference Figure 5 , Figure 5 This is a schematic diagram of the driving circuit in Embodiment 2 of the present invention; as shown Figure 5 As shown, in order to control the switching module 1, in this embodiment, the driving circuit further includes a control module 4;

[0080] The control module 4 is connected to the switching module 1;

[0081] The control module 4 is used to generate a switching signal according to a preset power supply sequence table and transmit the switching signal to the switching module 1;

[0082] The switching module 1 is also used to alternately transmit each of the power supply voltages to each of the backlight zones according to the switching signal.

[0083] It should be noted that the above-mentioned preset power supply sequence table can be a table of the power supply sequence of the power supply modules corresponding to each backlight zone, which can be preset and stored in the above-mentioned control module 4. The above-mentioned control module 4 can be a host computer or other devices, and this embodiment does not limit it.

[0084] Understandably, in the above-mentioned preset power supply sequence table, each backlight zone only needs to ensure that all power supply modules have a power supply period within one cycle;

[0085] It should be understood that, traditionally, if there are N backlight zones, there will also be N power supply modules, with each power supply module supplying power to one backlight zone. However, this embodiment can be configured with a switching module containing N switching units. Each switching unit has at least one control terminal, at least one output terminal, and at least N input terminals. The control terminal of the switching unit is connected to the control module, the output terminal of the switching unit is connected to the corresponding backlight zone, and each switching unit is connected to all power supply modules through N input terminals.

[0086] Furthermore, a preset power supply sequence table can be set in advance, which ensures that all power supply modules for each backlight zone have a power supply period within one cycle. That is, within each power supply period, the switching unit can allow N power supply modules to supply power to the corresponding backlight zones. The backlight zones corresponding to each power supply module can be different in different power supply periods within one cycle, thereby ensuring that each power supply module can supply power to each backlight zone at least once within one cycle.

[0087] For example, refer to Figure 6 , Figure 6 This is a schematic diagram of the backlight zone receiving voltage in Embodiment 2 of the present invention. If we continue to take four backlight zones as a group, then four time periods can be set within one cycle. As one implementation method, within one cycle, the switching module 1 can be controlled to be powered by the first power supply module 31 (i.e., ...) during the first time period. Figure 6 A12 and K12) provide power to the first backlight zone 21, and the second power supply module 32 (i.e. Figure 6 The second backlight zone 22 is powered by modules A22 and K22, and the third power supply module 33 (i.e. Figure 6 A21 and K21) provide power to the third backlight zone 23, and the fourth power supply module 34 (i.e. Figure 6 A11 and K11) provide power to the fourth backlight zone 24;

[0088] During the second period, the power supply can be provided by the fourth power supply module 34 (i.e. Figure 6 A11 and K11) provide power to the first backlight zone 21, and the first power supply module 31 (i.e. Figure 6 A12 and K12) provide power to the second backlight zone 22, and the second power supply module 32 (i.e. Figure 6 A22 and K22) provide power to the third backlight zone 23, and the third power supply module 33 (i.e. Figure 6 A21 and K21 in the middle provide power to the fourth backlight zone 24;

[0089] During the third time period, it can be powered by the third power supply module 33 (i.e. Figure 6 A21 and K21 provide power to the first backlight zone 21, and the fourth power supply module 34 (i.e. Figure 6 A11 and K11) provide power to the second backlight zone 22, and the first power supply module 31 (i.e. Figure 6 A12 and K12) provide power to the third backlight zone 23, and the second power supply module 32 (i.e. Figure 6 (A22 and K22) provide power to the fourth backlight zone 24;

[0090] During the fourth time period, the second power supply module 32 (i.e. Figure 6 A22 and K22) provide power to the first backlight zone 21, and the third power supply module 33 (i.e. Figure 6 A21 and K21) provide power to the second backlight zone 22, and the fourth power supply module 34 (i.e. Figure 6 A11 and K11) provide power to the third backlight zone 23, and the first power supply module 31 (i.e. Figure 6 A12 and K12 in the middle supply power to the fourth backlight zone 24; this is one cycle, so that all backlight zones can receive power from each power supply module within one cycle.

[0091] It should be emphasized that the above power supply sequence can be set according to the actual situation. It is only necessary to supply power to the power supply modules with different power supply voltages within a cycle. The duration of each time period can be the same or different. This embodiment does not impose any restrictions on this.

[0092] In a specific implementation, the control module 4 can generate a switching signal according to a pre-stored preset power supply sequence table and transmit the switching signal to the switching module 1. After receiving the switching signal, the switching module 1 can alternately transmit each power supply voltage to the corresponding backlight zone.

[0093] Furthermore, if the aforementioned switching module 1 is composed of a data selector, for example... Figure 4 When using a 4-to-1 data selector, such as Figure 4 As shown, the control module 4 can transmit the switching signal to the control terminal of the data selector (i.e., Figure 4 S0 and Taking the first data selector N1 as an example, the switching signals can be set to... 01, 10, or 11 can be used to control outputs A11, A12, A21, or A22. Of course, other control methods are also possible, and this embodiment does not limit them.

[0094] Furthermore, in order to construct the aforementioned preset power supply sequence table, in this embodiment, the control module 4 is also used to obtain the quantity information of the power supply modules and determine the power supply stage based on the quantity information;

[0095] The control module 4 is also used to generate a cycle stage based on the power supply stage, and to construct a preset power supply sequence table based on the cycle stage.

[0096] It should be understood that the above quantity information may be the quantity information of power supply modules within a group. In this embodiment, one backlight module 2 can be grouped into a group, and a group may include several backlight partitions. The division can be done according to the actual situation, and the number of backlight partitions in each group is not limited in this embodiment.

[0097] It should be noted that the above power supply stage can be a power supply stage within a cycle, which can be determined based on the number of backlight partitions in the backlight module 2. Since the number of backlight partitions is the same as the number of power supply modules, it can be determined based on the number of power supply modules. That is, if there are N backlight partitions, there will also be N power supply modules, and thus the number of power supply stages set within a cycle will also be N.

[0098] For example, if we still use Figure 6 For example, due to Figure 6 The backlight module 2 in the middle group contains 4 backlight zones, and the power supply voltage of the 4 backlight zones is different. Therefore, it can be determined that there can be 4 stages in one cycle (i.e., Figure 6 The power supply for the first to fourth time periods is determined, and then it is determined which power supply module will supply power to each backlight zone in each period. In order to ensure that the power supply voltage meets the needs of the backlight zone, in this embodiment, one power supply module supplies power to only one backlight zone in one period.

[0099] Once the power supply module corresponding to each backlight zone in each power supply stage is determined, the control module 4 can form a cycle of the four power supply stages, and construct the preset power supply sequence table based on the cycle stages.

[0100] Furthermore, in order to ensure that each power supply module corresponds to only one backlight module 2 in a power supply stage, in this embodiment, the control module 4 is also used to select the target power supply module for each backlight partition in each power supply stage from each power supply module, and the target power supply modules corresponding to each backlight partition are different in the same power supply stage;

[0101] The control module 4 is also used to generate a cycle phase based on each of the target power supply modules.

[0102] It should be noted that the aforementioned target power supply module can be the power supply module corresponding to each backlight zone in a power supply stage. For example, continuing with... Figure 6 To explain, if in the first power supply stage (i.e. Figure 6 During the first time period, the control module 4 can use the first power supply module 31 as the target power supply module for the first backlight partition 21 in the first power supply stage, the second power supply module 32 as the target power supply module for the second backlight partition 22 in the first power supply stage, the third power supply module 33 as the target power supply module for the third backlight partition 23 in the first power supply stage, and the fourth power supply module 34 as the target power supply module for the fourth backlight partition 24 in the first power supply stage.

[0103] Furthermore, after determining the first power supply stage, the control module 4 can determine the target power supply module corresponding to the second power supply stage. In order to ensure that each power supply module has a stage for powering a backlight zone, in this embodiment, each power supply module is in the cyclic stage corresponding to each backlight zone.

[0104] Understandably, when determining the target power supply module corresponding to the second power supply stage, in order to avoid repetition, the fourth power supply module 34 can be used as the target power supply module of the first backlight partition 21 in the second power supply stage, the first power supply module 31 can be used as the target power supply module of the second backlight partition 22 in the second power supply stage, the second power supply module 32 can be used as the target power supply module of the third backlight partition 23 in the second power supply stage, the third power supply module 33 can be used as the target power supply module of the fourth backlight partition 24 in the second power supply stage, and so on, until all four power supply stages are determined, forming a cyclic stage.

[0105] Furthermore, in this embodiment, the control module 4 described above is also used to obtain the initial power supply module corresponding to each of the backlight zones, and to use each of the initial power supply modules as the target power supply module for each of the backlight zones in the initial power supply stage.

[0106] The control module 4 is further configured to reorder the target power supply modules in the initial power supply stage, and determine the target power supply modules of each backlight partition in the remaining power supply stage based on the reordering results.

[0107] It should be understood that the aforementioned initial power supply module can be the power supply module corresponding to each backlight zone when the traditional solution has not been improved. Continuing with the above example, in the traditional case, the power supply module corresponding to the first backlight zone 21 is the first power supply module 31 (i.e., Figure 6 The power supply module corresponding to the second backlight partition 22 is the second power supply module 32 (i.e., A12 and K12). Figure 6The power supply module corresponding to the third backlight zone 23 (A22 and K22) is the third power supply module 33 (i.e., Figure 6 The power supply module corresponding to the fourth backlight zone 24 (A21 and K21) is the fourth power supply module 34 (i.e., Figure 6 If A11 and K11 are selected, then these power supply modules can be used as the initial power supply modules corresponding to each backlight zone;

[0108] The aforementioned initial power supply stage can be the first stage in a power supply cycle, i.e., the aforementioned first power supply stage. After obtaining each initial power supply module, it can be used as the target power supply module for each backlight zone in the first power supply stage.

[0109] After obtaining the target power supply module in the first power supply stage, the control module 4 can reorder each target power supply module to obtain the reordering result. Then, based on these reordering results, it selects the sorting method that meets the requirements as the target power supply module corresponding to each backlight zone in the remaining power supply stages (i.e., the second to fourth power supply stages).

[0110] Furthermore, in order to ensure that the selected brightness is relatively uniform, in this embodiment, the control module 4 is also used to obtain the brightness acquisition results of each of the backlight zones. The brightness acquisition results are the results obtained by supplying power to each of the backlight zones according to the corresponding target power supply module.

[0111] The control module 4 is further configured to determine the brightness variance of each backlight zone based on the acquisition results, and to determine the target power supply module of each backlight zone in the remaining power supply stage from each re-sorting result based on the brightness variance.

[0112] It should be noted that after obtaining each reordering result, the control module 4 can control the power supply to each backlight zone according to each reordering result, and collect the brightness of the backlight zone. Specifically, the brightness can be collected by relevant sensors, or by other means. This embodiment does not limit this.

[0113] For example, continuing based on the above example, after determining that the target power supply modules in the initial power supply stage are the first power supply module 31, the second power supply module 32, the third power supply module 33 and the fourth power supply module 34 in the order of the first to fourth backlight partitions 23, they can be reordered to obtain each reordering result;

[0114] Then, the switching module can be controlled to emit light as a backlight zone separately according to these reordering results. That is, each power supply module can be controlled to supply power to only one backlight zone at the same time according to each reordering result, simulating the power supply scenario under a power supply stage, and then the brightness of the backlight zone can be collected to obtain the above brightness collection results.

[0115] After obtaining the brightness acquisition results of the backlight zone, the control module 4 can calculate the brightness variance of the backlight zone. For example, if the brightness acquisition results of a certain backlight zone under four power supply stages are W, X, Y, and Z respectively, the variance can be calculated according to the variance formula based on W, X, Y, and Z, and used as the above brightness variance.

[0116] After obtaining the brightness variance, the control module 4 can select the reordering result with the smallest brightness variance from the reordering results as the target power supply module for the remaining power supply stage. Since the variance is the smallest, it can also be said that powering according to the target power supply module can ensure that the brightness difference of each backlight zone is minimized, further improving the display quality.

[0117] In this embodiment, the control module 4 can generate a switching signal corresponding to the current power supply stage according to the preset power supply sequence table, and transmit the switching signal to the switching module 1. After receiving the corresponding switching signal, the switching module 1 transmits the corresponding power supply voltage to each backlight zone module, thereby making the brightness more uniform and improving the display effect.

[0118] Furthermore, embodiments of this application also propose a display comprising the driving circuit described above.

[0119] Since this display adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0120] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

[0121] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0122] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0123] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed in this application.

Claims

1. A driving circuit, characterized in that, The driving circuit includes: a switching module, a backlight module including several backlight zones, and a power supply module corresponding to each of the backlight zones; The switching module is connected to each of the power supply modules and each of the backlight zones respectively; The power supply module is used to output the power supply voltage and transmit it to the switching module; The switching module is used to alternately transmit the power supply voltage to the corresponding backlight partition on the backlight module, and each backlight partition can receive the power supply voltage from all the power supply modules. The backlight module is used to display when it receives each of the power supply voltages; The drive circuit further includes: a control module; The control module is connected to the switching module; The control module is used to generate a switching signal according to a preset power supply sequence table and transmit the switching signal to the switching module. In the preset power supply sequence table, all power supply modules of each backlight partition have a power supply period in one cycle. During a power supply period, each power supply module simultaneously supplies power to the corresponding backlight partition. The switching module is also used to alternately transmit each of the power supply voltages to each of the backlight zones according to the switching signal.

2. The driving circuit as described in claim 1, characterized in that, The switching module includes: a plurality of switching units; The number of switching units is the same as the number of power supply modules, each switching unit is connected to each power supply module, and each switching unit is also connected to the corresponding backlight zone. The switching unit is used to alternately transmit the power supply voltage to the corresponding backlight partition.

3. The driving circuit as described in claim 2, characterized in that, The switching unit includes: a data selector; The voltage input terminals of the data selector are connected to the corresponding power supply module, and the voltage output terminal of the data selector is connected to the corresponding backlight zone.

4. The driving circuit as described in claim 1, characterized in that, The control module is also used to acquire the quantity information of the power supply modules and determine the power supply stage based on the quantity information; The control module is also used to generate a cycle stage based on the power supply stage, and to construct a preset power supply sequence table based on the cycle stage.

5. The driving circuit as described in claim 4, characterized in that, The control module is further configured to select a target power supply module for each backlight zone in each power supply stage from the power supply modules, wherein the target power supply modules corresponding to each backlight zone are different in the same power supply stage; The control module is also used to generate a cycle phase based on each of the target power supply modules.

6. The driving circuit as described in claim 5, characterized in that, Each of the power supply modules is in the loop phase corresponding to each of the backlight zones.

7. The driving circuit as described in claim 5, characterized in that, The control module is further configured to obtain the initial power supply module corresponding to each of the backlight zones, and use each of the initial power supply modules as the target power supply module for each of the backlight zones in the initial power supply stage. The control module is further configured to reorder the target power supply modules in the initial power supply stage, and determine the target power supply modules of each backlight zone in the remaining power supply stage based on the reordering results.

8. The driving circuit as described in claim 7, characterized in that, The control module is also used to acquire the brightness acquisition results of each of the backlight zones, wherein the brightness acquisition results are obtained by supplying power to each of the backlight zones according to the corresponding target power supply module; The control module is further configured to determine the brightness variance of each backlight zone based on the acquisition results, and to determine the target power supply module of each backlight zone in the remaining power supply stage from each re-sorting result based on the brightness variance.

9. A display, characterized in that, The display includes the driving circuitry as described in any one of claims 1 to 8.

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