Driving device, driving method and display device

Abstract

The invention provides a driving device, a driving method and a display device, and relates to the technical field of display. The driving device includes a first generation circuit including N generation sub-circuits each configured to generate a plurality of reference voltages, N being an integer greater than 1; the second generation circuit is electrically connected with the first generation circuit, the second generation circuit is configured to generate M reference voltages based on the multiple reference voltages according to the target brightness of the display panel, and M is an integer larger than 1; the third generation circuit is electrically connected with the second generation circuit, and the third generation circuit is configured to determine N target voltages for the N display subareas based on the M reference voltages according to the difference value between the target brightness and M reference brightness included in the N sets of reference brightness, the N groups of reference brightness are obtained based on the M reference voltages and are used for reference brightness of N display sub-areas included in the display panel.

Description

Technical Field

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

[0002] In some large-sized display devices, multiple pixel circuits included in a pixel array may require multiple data driving circuits to respectively provide data signals. However, there may be performance differences between different data driving circuits and display differences between different pixel circuits, which may cause the problem of uneven brightness in the display panel. Summary of the Invention

[0003] To solve the above problems, the present disclosure provides a driving device, a driving method, and a display device.

[0004] According to a first aspect, the present disclosure provides a driving device, including a first generating circuit including N generating sub-circuits, each of the N generating sub-circuits being configured to generate a plurality of reference voltages, where N is an integer greater than 1; a second generating circuit electrically connected to the first generating circuit, the second generating circuit being configured to generate M reference voltages based on the plurality of reference voltages according to a target brightness of a display panel, where M is an integer greater than 1; and a third generating circuit electrically connected to the second generating circuit, the third generating circuit being configured to respectively determine N target voltages for N display sub-regions based on the M reference voltages according to a difference between the target brightness and M reference brightnesses included in each of N groups of reference brightnesses, where the N groups of reference brightnesses are reference brightnesses for the N display sub-regions included in the display panel obtained based on the M reference voltages.

[0005] According to a second aspect, the present disclosure provides a display device including the driving device provided in an embodiment of the present disclosure.

[0006] According to a third aspect, the present disclosure provides a driving method, including generating a plurality of reference voltages; generating M reference voltages based on the plurality of reference voltages according to a target brightness of a display panel; and respectively determining N target voltages for N display sub-regions based on the M reference voltages according to a difference between the target brightness and M reference brightnesses included in each of N groups of reference brightnesses, where the N groups of reference brightnesses are reference brightnesses for the N display sub-regions included in the display panel obtained based on the M reference voltages. Brief Description of the Drawings

[0007] Figure 1 Shows a schematic structural diagram of a driving device according to an embodiment of the present disclosure;

[0008] Figure 2 Shows a schematic structural diagram of a first generating circuit according to an embodiment of the present disclosure;

[0009] Figure 3 The structural schematic diagram of a first generation circuit according to another embodiment of the present disclosure is shown;

[0010] Figure 4 The structural schematic diagram of a display device according to an embodiment of the present disclosure is shown; and

[0011] Figure 5 The schematic flowchart of a driving method according to an embodiment of the present disclosure is shown. Detailed implementation manners

[0012] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure. It should be noted that throughout the drawings, the same elements are denoted by the same or similar reference numerals. In the following description, some specific embodiments are for illustrative purposes only and should not be construed as any limitation to the present disclosure, but merely as examples of the embodiments of the present disclosure. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. It should be noted that the shapes and sizes of the components in the figures do not reflect the actual sizes and proportions, but only illustrate the content of the embodiments of the present disclosure.

[0013] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the ordinary meanings understood by those skilled in the art. The "first", "second" and similar terms used in the embodiments of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components.

[0014] In addition, in the description of the embodiments of the present disclosure, the term "connected" or "connected to" may mean that two components are directly connected, or may mean that the two components are connected via one or more other components. In addition, the two components may be connected or coupled by wired or wireless means.

[0015] In the embodiments of the present disclosure, the source and drain of the switching transistor are symmetric, so the source and drain can be interchanged. In the embodiments of the present disclosure, according to its function, the gate can be called the control electrode, one of the source and drain can be called the first electrode, and the other of the source and drain can be called the second electrode.

[0016] In addition, in the description of the embodiments of the present disclosure, the terms "first power supply voltage" and "second power supply voltage" are only used to distinguish the different amplitudes of the two power supply voltages. For example, in the following description, the "first power supply voltage" is a relatively low voltage, and the "second power supply voltage" is a relatively high voltage. Those skilled in the art can understand that the present disclosure is not limited thereto.

[0017] Figure 1 The structural schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0018] As Figure 1 shown, the driving device 100 includes a first generating circuit 110, a second generating circuit 120, and a third generating circuit 130.

[0019] In the embodiments of the present disclosure, the first generating circuit 110 includes N generating sub-circuits C1,... CN, where N is an integer greater than 2. The N generating sub-circuits C1,... CN respectively generate a plurality of reference voltages.

[0020] In the embodiments of the present disclosure, the generating sub-circuits C1,... CN may be gamma circuits, and the reference voltages are the gray-scale voltages output by the gamma circuits. The reference voltages are the references for the data voltages generated by the data driving circuit for different gray scales.

[0021] In the embodiments of the present disclosure, the pixel circuits included in the N display sub-regions of the display panel are respectively provided with data signals by N data driving circuits. Each of the N data driving circuits includes a gamma circuit for outputting a reference voltage. The gamma circuit can tap the constant voltage applied to a plurality of series circuits by using an operational amplifier to obtain a plurality of reference voltages. However, the operational amplifier in each gamma circuit will cause voltage offset, and the offset degrees may be different, which will cause the reference voltages generated by the plurality of gamma circuits to be different, resulting in different gray-scale characteristics of the plurality of data driving circuits.

[0022] In the embodiments of the present disclosure, the N generating sub-circuits C1,... CN are respectively used as the gamma circuits of the N data driving circuits, and the N generating sub-circuits are controlled to generate the same reference voltage, so that the N data driving circuits can generate corresponding data voltages based on the same reference voltage to reduce the brightness difference between the N display sub-regions.

[0023] In the embodiments of the present disclosure, the second generating circuit 120 is electrically connected to the first generating circuit 110. The second generating circuit 120 generates M reference voltages based on a plurality of reference voltages according to the target brightness of the display panel, where M is an integer greater than 2.

[0024] In the embodiments of the present disclosure, multiple reference voltages respectively correspond to multiple reference gray levels, and there is a mapping relationship between the reference voltage and the reference gray level. For example, the multiple reference voltages may include 9 reference voltages, and the 9 reference voltages may respectively correspond to gray level 0, gray level 32, gray level 64, gray level 96, gray level 128, gray level 160, gray level 192, gray level 224, and gray level 255. For example, when the pixel circuit is written with the reference voltage corresponding to gray level 32, the pixel circuit may display gray level 32.

[0025] In the embodiments of the present disclosure, the target brightness corresponds to the target gray level in the to-be-displayed picture of the display panel, and the mapping relationship between the brightness and the gray level can be described based on the gamma curve. The M reference voltages are determined based on the mapping relationship between the brightness and the gray level and the mapping relationship between the reference voltage and the reference gray level. The M reference voltages all correspond to the target brightness.

[0026] Due to certain losses or errors in the actual display process of the display panel, M reference voltages can be generated for the target brightness within the allowable deviation range. For example, based on the mapping relationship between the brightness and the gray level and the mapping relationship between the reference voltage and the reference gray level, the theoretical voltage corresponding to the target brightness is determined. The difference between the M reference voltages and the theoretical voltage is within the preset deviation range. For example, the deviation range can be 0 to 50 mV.

[0027] In the embodiments of the present disclosure, the third generation circuit 130 is electrically connected to the second generation circuit 120. The third generation circuit 130 respectively determines N target voltages for the N display sub-regions based on the M reference voltages according to the differences between the target brightness and the M reference brightnesses included in each of the N groups of reference brightnesses.

[0028] In the embodiments of the present disclosure, the N groups of reference brightnesses are the reference brightnesses for the N display sub-regions included in the display panel obtained based on the M reference voltages. Since the display capabilities and loss situations among the N display sub-regions are not completely the same, the brightnesses displayed by the N display sub-regions based on the same reference voltage may not be completely the same.

[0029] Each of the N groups of reference brightnesses in the N groups of reference brightnesses includes M reference brightnesses. The M reference brightnesses may be the M theoretical display brightnesses when a single display sub-region displays a picture based on the M reference voltages. For example, the M reference voltages can be provided to the display sub-region, so that when the display sub-region displays a picture based on the M reference voltages, the brightness of the display sub-region is collected to obtain the M reference brightnesses.

[0030] In the embodiments of the present disclosure, the M reference brightnesses included in each of the N groups of reference brightnesses for the N display sub-regions can be determined based on the mapping relationship between the voltage and the brightness characterized by the respective display parameters of the N display sub-regions.

[0031] In the embodiments of the present disclosure, the mapping relationship between the voltage and the brightness characterized by the display parameters of each of the N display sub-regions may be determined by collecting the historical display brightness of each of the N display sub-regions. For example, the historical display brightness and the historical data voltage of the N display sub-regions are collected in advance to determine the mapping relationship between the voltage and the brightness followed by each of the N display sub-regions. Due to the display differences of each of the N display sub-regions, the actual brightness of the N display sub-regions for displaying a picture based on the same data voltage may also be different. Therefore, the mapping relationships followed by each of the N display sub-regions are not exactly the same.

[0032] For example, a mapping table is generated based on the mapping relationships of each of the N display sub-regions, and the mapping table records the brightness corresponding to multiple voltages. By querying the mapping tables of each of the N display sub-regions, the reference brightness corresponding to the reference voltage can be obtained.

[0033] For example, the mapping table may be updated regularly. When a preset number of historical data voltages and historical display brightness are collected, the data recorded in the mapping table is updated to update the mapping relationship between the brightness and the voltage for the display sub-region, so as to improve the accuracy of the mapping relationship and determine the display differences between the N display sub-regions.

[0034] In the embodiments of the present disclosure, for each display sub-region, there is a certain difference between the M reference brightness and the target brightness. Since there is a mapping relationship between the brightness and the voltage, the difference between the reference voltage and the target voltage can be determined based on the difference between the reference brightness and the target brightness, so as to determine the target voltage.

[0035] Through the embodiments of the present disclosure, by using the N generating sub-circuits C1,..., CN as the gamma circuits of the N data driving circuits respectively, and controlling the N generating sub-circuits to generate the same reference voltage, the data voltages received by the N display sub-regions are generated based on the same reference voltage, thereby reducing the error between the data voltages. In addition, based on the display characteristics of each of the N display sub-regions regarding the brightness, the mapping relationship between the brightness and the voltage followed by each of the N display sub-regions is determined, so as to determine the different target voltages of each of the N display sub-regions for the same target brightness based on this mapping relationship, thereby reducing the brightness difference between the N display sub-regions.

[0036] In some embodiments, the process of the second generating circuit 120 generating the M reference voltages may further include: determining two reference gray levels from the multiple reference gray levels indicated by the multiple reference voltages based on the target gray level indicated by the target brightness, and generating the M reference voltages within the voltage range formed by the reference voltages indicated by the two reference gray levels.

[0037] In the embodiments of the present disclosure, each of the multiple reference voltages corresponds to a reference gray level. Based on the numerical magnitude order among the multiple reference gray levels, the multiple reference gray levels can form multiple gray level intervals. For example, the 9 reference gray levels described above can form 8 gray level intervals. Correspondingly, the multiple reference voltages can form multiple voltage intervals respectively corresponding to the multiple gray level intervals. Based on the target gray level interval where the target gray level is located, the reference voltage interval where the reference voltage is located can be determined.

[0038] The two reference gray levels are the two endpoint values of the target gray level interval where the target gray level is located, and the reference voltages indicated by the two reference gray levels are the two endpoint values of the reference voltage interval where the reference voltage is located. Based on the mapping relationship between the reference voltage interval and the target gray level interval, the theoretical voltage corresponding to the target brightness is determined, and M reference voltages with a certain deviation from the theoretical voltage are determined within the allowable deviation range.

[0039] In the embodiments of the present disclosure, since the mapping relationship between the reference voltage and the reference gray level may be variable rather than a standard linear change, by determining the target brightness region of the target brightness and the target gray level interval of the target gray level, the change trend between the target brightness and the theoretical voltage can be determined, thereby improving the accuracy of the M reference brightnesses.

[0040] In some embodiments, the process of the third generation circuit 130 generating the target brightness of each of the N display sub-regions may further include: for each display sub-region, based on the target brightness, determining a first brightness and a second brightness from the M reference brightnesses, where the first brightness and the second brightness are the two brightness values closest to the target brightness among the M reference brightnesses. The third generation circuit 130 determines the target voltage for each of the N display sub-regions according to the first reference voltage indicated by the first brightness and the second reference voltage indicated by the second brightness of each of the N display sub-regions.

[0041] In the embodiments of the present disclosure, based on the numerical magnitude order among the M reference brightnesses, the M reference brightnesses can form M - 1 brightness intervals. Based on the target brightness interval where the target brightness is located, the target voltage interval where the target voltage is located can be determined. The first brightness and the second brightness are respectively the two endpoint values of the target brightness interval where the target gray level is located, and the first reference voltage and the second reference voltage are the two endpoint values of the target voltage interval where the target voltage is located.

[0042] Within the target brightness range, there is a linear relationship between brightness and voltage. Based on the linear relationship between brightness and voltage, the target voltage corresponding to the target brightness can be determined. Since the M reference brightness values of each of the N display sub-regions are not exactly the same, the M - 1 brightness ranges of each of the N display sub-regions are also not exactly the same. Based on the target brightness ranges of the N display sub-regions for the target brightness, the first reference voltage and the second reference voltage of each of the N display sub-regions are respectively determined.

[0043] Within the target voltage ranges of each of the N display sub-regions, the target voltages of each of the N display sub-regions are determined, thereby improving the accuracy of the target voltages of each of the N display sub-regions.

[0044] Taking N = 2 as an example, a schematic illustration of the first generation circuit 110 is given. Figure 2 The structural schematic diagram of the first generation circuit according to an embodiment of the present disclosure is shown.

[0045] As Figure 2 shown, the first generation circuit 110 includes generation sub-circuits C1 and C2.

[0046] In an embodiment of the present disclosure, the generation sub-circuit C1 includes a generation unit 101 and a voltage division unit 102. The generation sub-circuit C2 includes a generation unit 201 and a voltage division unit 202.

[0047] In an embodiment of the present disclosure, the generation unit 101 includes at least two initial output terminals, and the voltage division unit 102 includes a plurality of reference output terminals VS1. The generation unit 101 generates at least two initial voltages Vinit1 via the two initial output terminals. The voltage division unit 102 is electrically connected to the at least two initial output terminals and the plurality of reference output terminals. The voltage division unit 102 divides the at least two initial voltages Vinit1 to obtain a plurality of reference voltages VS1 and outputs them via the plurality of reference output terminals.

[0048] The generation unit 201 includes at least two initial output terminals, and the voltage division unit 202 includes a plurality of reference output terminals VS2. The generation unit 201 generates at least two initial voltages Vinit2 via the two initial output terminals. The voltage division unit 202 is electrically connected to the at least two initial output terminals and the plurality of reference output terminals. The voltage division unit 202 divides the at least two initial voltages Vinit2 to obtain a plurality of reference voltages VS2 and outputs them via the plurality of reference output terminals.

[0049] In an embodiment of the present disclosure, the number of reference output terminals included in each of the N generation sub-circuits is the same. The plurality of reference output terminals respectively indicate a plurality of reference gray levels. The reference output terminals indicating the same reference gray level among the plurality of reference output terminals included in each of the N generation sub-circuits are connected.

[0050] For example, the number of reference voltages output by each generating sub-circuit is the same, and the reference voltages for the same reference gray level are the same. For example, the respective reference output terminals for the same reference gray level among the N generating sub-circuits are all short-circuited. Short-circuiting means connecting between two points through a wire with a very small effective resistance, so that the voltages between the two points tend to balance.

[0051] By short-circuiting the respective reference output terminals for the same reference gray level among the N generating sub-circuits, it is possible to further correct the voltages of the respective reference output terminals, make the voltages between the respective reference output terminals at the same reference gray level consistent, and be able to provide the same gamma reference voltage for the pixel driving circuit.

[0052] In the embodiments of the present disclosure, at least two initial output terminals include a first initial output terminal and a second initial output terminal. The first initial output terminal is electrically connected to a first reference output terminal among the plurality of reference output terminals. The first initial output terminal is used to output the maximum voltage among at least two initial voltages, and the first reference output terminal is used to output the maximum voltage among the plurality of reference voltages. The second initial output terminal is electrically connected to a second reference output terminal among the plurality of reference output terminals. The second initial output terminal is used to output the minimum voltage among at least two initial voltages, and the second reference output terminal is used to output the minimum voltage among the plurality of reference voltages.

[0053] For example, both the generating sub-circuit C1 and the generating sub-circuit C2 include two reference output terminals. The generating sub-circuit C1 may include a first initial output terminal Vinit1-1 and a second initial output terminal Vinit1-2, and the generating sub-circuit C2 may include a first initial output terminal Vinit2-1 and a second initial output terminal Vinit2-2.

[0054] The first initial output terminal Vinit1-1 and the second initial output terminal Vinit1-2 respectively output a first initial voltage Vinit1-1 and a second initial voltage Vinit1-2, where the first initial voltage Vinit1-1 is the larger value and the second initial voltage Vinit1-2 is the smaller value. The first initial output terminal Vinit2-1 and the second initial output terminal Vinit2-2 respectively output a first initial voltage Vinit2-1 and a second initial voltage Vinit2-2, where the first initial voltage Vinit2-1 is the larger value and the second initial voltage Vinit2-2 is the smaller value.

[0055] In an embodiment of the present disclosure, the generating sub - circuit C1 includes K - 1 reference output terminals VS1 - 1, …, VS1 - K, and the generating sub - circuit C2 includes K - 1 reference output terminals VS2 - 1, …, VS2 - K. The reference output terminal VS1 - 1 is electrically connected to the first initial output terminal Vinit1 - 1, the reference output terminal VS1 - K is electrically connected to the second initial output terminal Vinit1 - 2, the reference output terminal VS2 - 1 is electrically connected to the first initial output terminal Vinit2 - 1, and the reference output terminal VS2 - K is electrically connected to the second initial output terminal Vinit2 - 2. The reference output terminal VS1 - 1 is short - circuited with the reference output terminal VS2 - 1, the reference output terminal VS1 - 2 is short - circuited with the reference output terminal VS2 - 2, …… the reference output terminal VS1 - K is short - circuited with the reference output terminal VS2 - K.

[0056] In an embodiment of the present disclosure, the reference output terminals VS1 - 1, …, VS1 - K can sequentially output K reference voltages VS1 - 1, …, VS1 - K, and the values of the K reference voltages VS1 - 1, …, VS1 - K decrease sequentially. The reference output terminals VS2 - 1, …, VS2 - K can sequentially output K reference voltages VS2 - 1, …, VS2 - K, and the values of the K reference voltages VS2 - 1, …, VS2 - K decrease sequentially.

[0057] The reference voltage VS1 - 1 is consistent with the first initial voltage Vinit1 - 1, the reference voltage VS2 - 1 is consistent with the first initial voltage Vinit2 - 1, and the reference voltage VS1 - 1 is consistent with the reference voltage VS2 - 1. The reference voltage VS1 - 2 is consistent with the first initial voltage Vinit1 - 2, the reference voltage VS2 - 2 is consistent with the first initial voltage Vinit2 - 2, and the reference voltage VS1 - 2 is consistent with the reference voltage VS2 - 2.

[0058] In an embodiment of the present disclosure, the voltage - dividing unit 102 can divide the voltage difference between the first initial voltage Vinit1 - 1 and the first initial voltage Vinit1 - 2 to obtain K reference voltages VS1 - 1, …, VS1 - K. The voltage - dividing unit 202 can divide the voltage difference between the first initial voltage Vinit2 - 1 and the first initial voltage Vinit2 - 2 to obtain K reference voltages VS2 - 1, …, VS2 - K.

[0059] In an embodiment of the present disclosure, the voltage - dividing unit 102 includes a plurality of variable resistors R1 - 1, …, R1 - K - 1 connected in series and a controller. The controller controls the resistance values of the plurality of variable resistors R1 - 1, …, R1 - K - 1 respectively. The voltage - dividing unit 202 includes a plurality of variable resistors R2 - 1, …, R2 - K - 1 connected in series and a controller. The controller controls the resistance values of the plurality of variable resistors R2 - 1, …, R2 - K - 1 respectively.

[0060] The controllers of the voltage dividing unit 102 and the voltage dividing unit 202 respectively control the resistance values of their respective multiple variable resistors, so that the resistance value relationships among the multiple variable resistors included in the generating sub-circuit C1 and the generating sub-circuit C2 are the same.

[0061] In the embodiments of the present disclosure, the voltage dividing units of the N generating sub-circuits each include a plurality of resistors connected in series, and in any two voltage dividing units, the resistance value ratios of the plurality of resistors connected in series are the same. For example, the resistance value ratio among the multiple variable resistors R1-1, …, R1-K-1 is the same as the resistance value ratio of the multiple variable resistors R2-1, …, R2-K-1. In the generating sub-circuit, a resistor is connected between every two adjacent reference output terminals. For example, the reference output terminal VS1-1 and the reference output terminal V1-2 are respectively connected to both ends of the resistor R1-1.

[0062] In this case, when the voltage between the first initial voltage Vinit1-1 and the first initial voltage Vinit1-2 applied in the generating sub-circuit C1 is the same as the voltage between the first initial voltage Vinit2-1 and the first initial voltage Vinit2-2 applied in the generating sub-circuit C2, the reference voltages of the reference output terminals assigned to the same reference gray level are kept consistent.

[0063] In the embodiments of the present disclosure, the generating sub-circuit may further include an adjusting unit. The adjusting unit adjusts the reference voltages of N-1 generating sub-circuits with reference to the reference voltages of the N generating sub-circuits according to the voltage differences corresponding to the same reference gray level in the N generating sub-circuits, so that the voltages among the respective reference output terminals corresponding to the same reference gray level in the N generating sub-circuits are consistent.

[0064] By collecting the reference voltages corresponding to the same reference gray level in the generating sub-circuit C1 and the generating sub-circuit C2, and using the reference voltage of the generating sub-circuit C1 corresponding to the same reference gray level as a reference, the voltage difference between the generating sub-circuit C2 and the generating sub-circuit C1 corresponding to the same reference gray level is calculated, and the voltages output from the first initial output terminal Vinit2-1 and the second initial output terminal Vinit2-2 of the generating sub-circuit C2 are adjusted.

[0065] The voltage difference corresponding to the same gray scale can be a voltage difference obtained by collecting and comparing the voltages corresponding to any one of the 0-255 gray scales in the N generating sub-circuits, or can be a voltage difference obtained by respectively collecting the voltages corresponding to multiple gray scales among the 256 gray scales in the N generating sub-circuits, comparing the voltages corresponding to the same gray scale, and taking the average value. Of course, it can also be multiple voltage differences obtained by respectively collecting the voltages corresponding to multiple gray scales among the 256 gray scales in the N generating sub-circuits and comparing the voltages corresponding to the same gray scale. Here, the number of voltage differences corresponding to the same gray scale is not specifically limited.

[0066] In the embodiment of the present disclosure, the first initial output terminal Vinit1-1 and the first initial output terminal Vinit2-1 are respectively connected to the reference voltage output terminal VS1-1 with the highest reference voltage and the reference voltage output terminal VS1-K-1 with the lowest reference voltage among the multiple reference output terminals of the generating sub-circuit. By adjusting the voltage output from the initial output terminal of the generating unit in the generating sub-circuit, the voltage between the reference voltage output terminal VS1-1 and the reference output terminal VS1-K-1 of the generating sub-circuit is adjusted, so that the voltages between the reference voltage output terminal VS1-1 and the reference output terminal VS1-K-1 in the N generating sub-circuits can be made consistent. Since the resistance ratio of the multiple resistors connected in series in any two generating sub-circuits 1 is the same, the reference voltages of each reference output terminal assigned to the same reference gray scale are the same, that is, the reference voltages for the same reference gray scale are the same, thereby reducing the brightness difference caused by voltage differences.

[0067] Figure 3 FIG. shows a schematic structural diagram of a first generating circuit according to another embodiment of the present disclosure.

[0068] As Figure 3 shown, the generating sub-circuit C1 further includes a third initial output terminal Vinit1-3, and the generating sub-circuit C2 further includes a third initial output terminal Vinit2-3. The third initial output terminal Vinit1-3 is connected to any one of the multiple reference output terminals except the first reference output terminal VS1-1 and the second reference output terminal VS1-K-1. The third initial output terminal Vinit2-3 is connected to any one of the multiple reference output terminals except the first reference output terminal VS2-1 and the second reference output terminal VS2-K-1.

[0069] In an embodiment of the present disclosure, the voltage dividing unit 102 divides the voltage range between the first initial voltage Vinit1-1 output from the first initial output terminal Vinit1-1 and the third initial voltage Vinit1-3 output from the third initial output terminal Vinit1-3, and divides the voltage range between the third initial voltage Vinit1-3 output from the third initial output terminal Vinit1-3 and the second initial voltage Vinit1-2 output from the second initial output terminal Vinit1-2, to obtain a plurality of reference voltages VS1-1, …, VS1-K.

[0070] In an embodiment of the present disclosure, the voltage dividing unit 202 divides the voltage range between the first initial voltage Vinit2-1 output from the first initial output terminal Vinit2-1 and the third initial voltage Vinit2-3 output from the third initial output terminal Vinit2-3, and divides the voltage range between the third initial voltage Vinit2-3 output from the third initial output terminal Vinit2-3 and the second initial voltage Vinit2-2 output from the second initial output terminal Vinit2-2, to obtain a plurality of reference voltages VS2-1, …, VS2-K.

[0071] In an embodiment of the present disclosure, by adjusting the voltage of each initial output terminal of the generating unit, it is possible to make the voltages of the reference output terminals of the highest reference voltage, the lowest reference voltage, and another reference voltage among the N generating sub-circuits consistent respectively, and it is also possible to make the voltages of the gamma reference voltage output terminals assigned to the same gray level consistent, thereby reducing the brightness difference caused by the voltage difference.

[0072] Figure 4 The structural schematic diagram of the display device according to the embodiment of the present disclosure is shown.

[0073] As Figure 4 shown, the display device 300 may include a driving device 100.

[0074] In an embodiment of the present disclosure, the driving device 100 may be a data driving circuit of the display device 300. The N generating sub-circuits included in the first generating circuit 110 in the driving device 100 may respectively provide reference voltages for N display sub-regions included in the display panel of the display device 300.

[0075] The second generating circuit 120 in the driving device 100 may also include N second generating sub-circuits, and the N second generating sub-circuits respectively generate M reference voltages for the N display sub-regions. The third generating circuit 130 in the driving device 100 may also include N third generating sub-circuits, and the N third generating sub-circuits respectively generate N target voltages for the N display sub-regions.

[0076] In the embodiments of the present disclosure, the process of the driving device 100 generating N target voltages may refer to the foregoing description and will not be elaborated herein.

[0077] Figure 5 The flowchart shows a schematic flow of a driving method according to an embodiment of the present disclosure.

[0078] As Figure 5 shown, the driving method may include operation S310 to operation S330.

[0079] In operation S310, a plurality of reference voltages are generated.

[0080] In operation S320, M reference voltages are generated based on the plurality of reference voltages according to the target brightness of the display panel.

[0081] In operation S330, N target voltages for N display sub-regions are respectively determined based on the M reference voltages according to the differences between the target brightness and the M reference brightnesses included in each of the N groups of reference brightnesses.

[0082] In the embodiments of the present disclosure, operations S310 to S330 are similar to the operations performed by the foregoing driving device 100 and will not be elaborated herein.

[0083] In the embodiments of the present disclosure, the N groups of reference brightnesses are reference brightnesses for the N display sub-regions included in the display panel obtained based on the M reference voltages.

[0084] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above-mentioned module, program segment, or part of code includes one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0085] Those skilled in the art will understand that the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly recited in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0086] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in the respective embodiments cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present disclosure.

Claims

1. A driving device, comprising: A first generating circuit includes N generating sub-circuits, each of the N generating sub-circuits is configured to generate a plurality of reference voltages, where N is an integer greater than 1; a second generating circuit electrically connected to the first generating circuit, the second generating circuit being configured to generate M reference voltages based on the plurality of reference voltages according to a target brightness of the display panel, where M is an integer greater than 1; as well as A third generating circuit is electrically connected to the second generating circuit, and the third generating circuit is configured to determine N target voltages for the N display sub-areas based on the M reference voltages according to a difference between the target brightness and M reference brightnesses respectively included in N groups of reference brightness, wherein the N groups of reference brightness are reference brightnesses for the N display sub-areas included in the display panel obtained based on the M reference voltages.

2. The driving device according to claim 1, wherein: The generating subcircuit comprises: a generating unit, comprising at least two initial output terminals, the generating unit being configured to generate at least two initial voltages via the two initial output terminals; and A voltage dividing unit, comprising a plurality of reference output terminals, the voltage dividing unit being electrically connected to the at least two initial output terminals and the plurality of reference output terminals, the voltage dividing unit dividing the at least two initial voltages to obtain the plurality of reference voltages, and outputting the plurality of reference voltages via the plurality of reference output terminals; The N generating subcircuits each include the same number of reference output terminals, the multiple reference output terminals respectively indicate multiple reference grayscales, and the reference output terminals indicating the same reference grayscale among the multiple reference output terminals each include the N generating subcircuits are connected.

3. The driving device according to claim 2, wherein: The at least two initial output terminals include a first initial output terminal and a second initial output terminal; The first initial output terminal is electrically connected to a first reference output terminal among the multiple reference output terminals, the first initial output terminal is used to output a maximum voltage among the at least two initial voltages, and the first reference output terminal is used to output a maximum voltage among the multiple reference voltages; as well as The second initial output terminal is electrically connected to a second reference output terminal among the multiple reference output terminals, the second initial output terminal is used to output a minimum voltage among the at least two initial voltages, and the second reference output terminal is used to output a minimum voltage among the multiple reference voltages.

4. The driving device according to claim 3, wherein: The at least two initial output terminals further include a third initial output terminal; wherein the third initial output terminal and any reference output terminal among the plurality of reference output terminals except the first reference output terminal and the second reference output terminal; The voltage divider unit is also configured to divide the voltage range between the first initial voltage output by the first initial output terminal and the third initial voltage output by the third initial output terminal, and to divide the voltage range between the third initial voltage output by the third initial output terminal and the second initial voltage output by the second initial output terminal, so as to obtain the multiple reference voltages.

5. The driving device according to claim 2, wherein: The voltage dividing unit comprises: a plurality of variable resistors connected in series; and The controller is configured to control the resistance values ​​of the plurality of variable resistors so that the resistance relationship between the plurality of variable resistors included in each of the N generating sub-circuits is the same.

6. The driving device according to claim 1, wherein: The second generating circuit is further configured to: Based on the target grayscale indicated by the target brightness, determining two reference grayscales from a plurality of reference grayscales indicated by the plurality of reference voltages; as well as The M reference voltages are generated within a voltage range formed by the reference voltages indicated by the two reference gray scales.

7. The driving device according to claim 1, wherein: The M reference brightnesses included in each of the N groups of reference brightnesses for the N display sub-areas are determined based on a mapping relationship between voltage and brightness represented by display parameters of each of the N display sub-areas.

8. The driving device according to claim 1, wherein: The third generating circuit is further configured to: For each of the display sub-areas, based on the target brightness, determine a first brightness and a second brightness from the M reference brightnesses, where the first brightness and the second brightness are two brightness values ​​closest to the target brightness among the M reference brightnesses; as well as A target voltage for each of the N display sub-areas is determined according to a first reference voltage indicated by the first brightness of each of the N display sub-areas and a second reference voltage indicated by the second brightness of each of the N display sub-areas.

9. A display device, comprising: A drive device as claimed in any one of claims 1 to 8.

10. A driving method, comprising: generating multiple reference voltages; generating M reference voltages based on a plurality of reference voltages according to a target brightness of the display panel; as well as According to the difference between the target brightness and the M reference brightnesses respectively included in the N groups of reference brightnesses, N target voltages for the N display sub-areas are respectively determined based on the M reference voltages, wherein the N groups of reference brightnesses are reference brightnesses for the N display sub-areas included in the display panel obtained based on the M reference voltages.

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