CN115547239A - Driving method and device of LED assembly - Google Patents

Abstract

The application provides a driving method and a device of an LED assembly, when the duration corresponding to part of bits in an enable signal is smaller than a preset threshold, the part of the repeatedly sent enable signal is merged, so that under the condition that the total duration is unchanged, the duration corresponding to the part of the repeatedly sent enable signal, of which the duration is smaller than the preset threshold, is increased every time, the brightness of the LED assembly is reduced, and the condition that the time length of the lowest bit of the enable signal is not lower than the preset threshold to influence the normal display of the LED assembly can be further ensured. Therefore, the display driving device can ensure that the width of the minimum pulse in the enable signal does not influence normal display when the brightness is reduced, and simultaneously keeps higher refresh rate and gray scale.

Description

Driving method and device of LED assembly

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a method and an apparatus for driving a light-emitting diode (LED) module.

Background

The LED driving chip arranged in the electronic equipment can be used for driving the LED component of the LED display screen to emit light to realize display. The LED driving chip at least comprises a shift register, a latch and a constant current driver, wherein the enable signal is used for indicating the gray scale of the LED component, so that the specific gray scale value of the LED component is adjusted according to the on-time of the enable signal

In the prior art, the electronic device may increase the refresh rate of the LED module by "scattering the gray scale", that is, within the total time range of the enable signal, the pulse width is divided into multiple segments for displaying. Meanwhile, based on the processing mode of scattering the enabling signal of the LED driving chip, a larger refresh rate can be obtained, if the refreshing rate is kept, the brightness of the LED component display can be reduced, the time length of the minimum pulse in the enabling signal can be reduced, and therefore the refreshing rate and the gray scale number can be kept constant.

Therefore, how to reduce the time length of the pulse in the enable signal to reduce the display brightness of the LED device and maintain the refresh rate and the gray scale is a technical problem to be solved in the art.

Disclosure of Invention

The application provides a driving method and a driving device of an LED assembly, which are used for solving the technical problem that when an LED is driven in the prior art, the display brightness of the LED assembly cannot be reduced by reducing the pulse time length in an enabling signal, and meanwhile, the refresh rate and the gray scale can be kept.

The first aspect of the present application provides a driving method of an LED assembly, including: acquiring a first enabling signal of an LED assembly to be driven; the first enable signal comprises a plurality of consecutive portions, each portion for indicating a one bit data of a gray level value of the LED assembly; determining a first part of the first enabling signal, wherein the duration T1 is less than a preset threshold value; when the first enable signals are repeatedly sent to the LED assembly n times, the first parts of every x continuous first enable signals in the n first enable signals are subjected to combination processing, so that the duration of the first part of the 1 st first enable signal in the x first enable signals is T1 x, the duration of the first part of the first enable signal after the 1 st first enable signal in the x first enable signals is 0, and the T1 x is larger than the preset threshold value.

In an embodiment of the first aspect of the present application, the acquiring a first enable signal of an LED assembly to be driven includes: acquiring a second enabling signal of the LED assembly to be driven; processing the second enabling signal according to a preset rule to obtain a first enabling signal; the longest duration part of the first enable signal is smaller than the longest duration part of the second enable signal.

In an embodiment of the first aspect of the present application, the preset rule includes: splitting the second enable signal into a first segment and a second segment to obtain the first enable signal; wherein the first segment comprises: a signal of the second enable signal for indicating a part of the multi-bit data of the gray scale value of the LED assembly; the second segment includes: and in the second enabling signal, the signal of the other part of the multi-bit data indicating the gray-scale value of the LED assembly is split into m times of repeated transmissions in sequence in the second period, and the duration of each transmission is 1/m of the total time of the second period.

In an embodiment of the first aspect of the present application, the preset rule includes: and splitting the second enabling signal into m times of repeated sending in sequence, wherein the duration of each sending is 1/m of the total time of the second enabling signal, and obtaining the first enabling signal.

In an embodiment of the first aspect of the present application, before acquiring the first enable signal of the LED component to be driven, the method further includes: determining to reduce the brightness of the LED assembly to be driven; and reducing the duration of the part with the shortest duration in the enabling signal of the LED assembly to be driven.

A second aspect of the present application provides a driving apparatus for an LED assembly, which can be used to perform the driving method for the LED assembly as provided in the first aspect of the present application, the apparatus comprising: the acquisition module is used for acquiring a first enabling signal of the LED component to be driven; the first enable signal comprises a plurality of consecutive portions, each portion for indicating a one bit data of a gray level value of the LED assembly; the processing module is used for determining a first part of the first enabling signal, wherein the duration T1 is less than a preset threshold value; and the driving module is used for merging the first parts of every x continuous first enable signals in the n first enable signals when the first enable signals are repeatedly sent to the LED assembly for n times, so that the duration of the first part of the 1 st first enable signal in the x first enable signals is T1 x, the duration of the first part of the first enable signal after the 1 st first enable signal in the x first enable signals is 0, and the T1 x is greater than the preset threshold value.

In an embodiment of the second aspect of the present application, the obtaining module is specifically configured to obtain a second enable signal of the LED component to be driven; processing the second enabling signal according to a preset rule to obtain a first enabling signal; the longest duration part of the first enable signal is smaller than the longest duration part of the second enable signal.

In an embodiment of the second aspect of the present application, the preset rule includes: splitting the second enable signal into a first segment and a second segment to obtain the first enable signal; wherein the first segment comprises: a signal of a part of the multi-bit data indicating a gray-scale value of the LED assembly in the second enable signal; the second segment includes: and in the second enabling signal, the signal of the other part of the multi-bit data indicating the gray-scale value of the LED assembly is split into m times of repeated transmissions in sequence in the second period, and the duration of each transmission is 1/m of the total time of the second period.

In an embodiment of the second aspect of the present application, the preset rule includes: and splitting the second enabling signal into m times of repeated sending in sequence, wherein the duration of each sending is 1/m of the total time of the second enabling signal, and obtaining the first enabling signal.

In an embodiment of the second aspect of the present application, the processing module is further configured to determine to reduce the brightness of the LED component to be driven; and reducing the duration of the part with the shortest duration in the enabling signal of the LED assembly to be driven.

To sum up, according to the driving method of the LED module provided in the embodiment of the present application, when the duration corresponding to a part of bits in the enable signal is smaller than the preset threshold, the part of the repeatedly transmitted enable signal is merged, so that under the condition that the total duration is not changed, the duration corresponding to the part of the repeatedly transmitted enable signal whose duration is smaller than the preset threshold is increased, so that the display driving apparatus can reduce the brightness of the LED module by reducing the duration T1 of the lowest bit in the enable signal OE, that is, the minimum time length T1, and can also ensure that the time length of the lowest bit in the enable signal is not lower than the preset threshold, so as to affect the normal display of the LED module. Finally, by using the driving method of the LED assembly in the embodiment of the present application, the display driving device can ensure that the width of the minimum pulse in the enable signal OE does not affect the normal display when the brightness is reduced, and simultaneously maintain a higher refresh rate and a higher gray scale, and under the condition of the same display brightness, a display effect with more uniform brightness and better gray scale linearity can be obtained. In addition, when the minimum time length T1 in the enabling signal is reduced, the display driving device cannot be reduced to be smaller than a preset threshold value to generate surge influence, the display effect of the LED assembly can be improved, the effect of reducing electromagnetic interference can enable the LED assembly to pass EMC authentication more easily, and the display driving device is easy to popularize and implement.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of an application scenario of the present application;

FIG. 2 is a waveform diagram of an LED driving signal;

FIG. 3 is a schematic diagram of the width of an enable signal OE;

FIG. 4 is a diagram illustrating an actual waveform of an enable signal;

FIG. 5 is a schematic diagram illustrating a gray-level scattering manner of the enable signal OE;

FIG. 6 is a diagram illustrating the time length of an enable signal OE;

FIG. 7 is a schematic diagram of another gray level scattering manner of the enable signal OE;

fig. 8 is a schematic diagram of an application scenario of an LED driving method according to an embodiment of the present application;

FIG. 9 is a schematic diagram of the repeated transmission of the enable signal provided in the present application;

FIG. 10 is a schematic diagram of a merge process for enable signals provided herein;

FIG. 11 is a waveform diagram illustrating an enable signal provided herein;

fig. 12 is a schematic diagram illustrating a combination manner of enable signals provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Before formally describing the embodiments of the present application, a description will be given of the application scenarios and problems of the prior art with reference to the accompanying drawings. Specifically, fig. 1 is a schematic diagram of an application scenario of the present application, and fig. 1 shows a scenario in which an electronic device drives an LED according to a driving signal, where the electronic device may be any device having an LED display screen, such as a mobile phone, a computer, and a household appliance, and then in order to drive the LED display screen of the electronic device, an LED driving chip (IC) may be disposed in the electronic device, and the LED driving chip drives an LED component of the LED display screen to emit light, so as to implement a display function of the LED display screen.

In some embodiments, the LED driving chip includes at least the functional modules as in fig. 1: shift register, latch and constant current driver. The shift register is used for receiving a clock signal CLK and a serially input data signal SDI, and the data signal SDI can be used for indicating whether the LED assembly lights up to emit light. And then, inputting the data signal SDI into the latch, keeping outputting the data signal SDI to the constant current driver by the latch according to the latch signal LE, and finally, driving the LED assembly of the LED display screen to emit light by the constant current driver according to the output enable signal OE. The enable signal OE is used for indicating the gray scale of the LED assembly, so that the specific gray scale value of the LED assembly is adjusted according to the on-time of the enable signal OE.

In some embodiments, fig. 2 is a waveform diagram of LED driving signals, which illustrates a waveform diagram of each driving signal received by the LED driving chip as in fig. 1, taking the LED driving chip driving 16 LED assemblies as an example, a data signal SDI serially input to the LED driving chip corresponds to 16 LED assemblies respectively according to a period of a clock signal CLK, a serial data signal SDI is input to a latch when a latch signal LE is at a low level, and after both the data signal SDI and the clock signal are input to the latch, an enable signal OE may be input to a constant current driver, the enable signal OE being active at a low level, the constant current driver may turn on the corresponding LED assembly according to the data signal SDI, and the enable signal OE being turned off at a high level.

More specifically, the gray scale of the LED display screen can be understood as the resolution of each LED element, for example, a 4-bit gray scale represents that the LED has a brightness variation of 2 to the power of 4 and 16 levels, thereby realizing a 16-level gray scale; for example, 16 bits have a gray scale change of 2 to the power of 15, and are expressed as 1 to 65535 color gray scales in numerical terms. The gray scale of the LED brightness is controlled by the SDI and OE width on the driving chip. The OE width of each adjacent bit is 2 times, that is, if the OE width of 1bit is 1 unit width T1, the width of 2 bits should be 2 unit widths, and the width of 4 bits should be 8 unit widths, and so on.

In some embodiments, fig. 3 is a schematic width diagram of an enable signal OE, wherein, assuming that an LED display screen of an electronic device has an nbit enable signal OE, which can realize 2 n-th gray scales, a time length of a first bit W1 in the enable signal OE is denoted as T1, a time length of a second bit W2 is 2 × T1, … …, and a time length of an nth bit Wn is 2 × T1, … … ^{n -1} * T1, the length of time T2= T1+2 of the final overall OE signal ² *T1+……+2 ^n-1 *T1。

Exemplarily, fig. 4 is a schematic diagram of an actual waveform of an enable signal, wherein, taking a waveform of a common 8-bit enable signal OE capable of realizing 256 levels of gray scale values as an example, the enable signal OE will be divided into 8 segments according to 8 bits in a manner as shown in fig. 3, and a time length of each segment is according to 128:64:32:16:8:4:2: the proportion of 1 is distributed, and the proportion corresponds to the weight of each bit in 8 bits. Then when the LED component displays 163 gray scale value, 8 bits corresponding to binary are 10100011, so that when the enable signal OE shown in fig. 4 realizes L =10100011 gray scale value, the first bit W1=1, the second bit W2=1, the third bit W3=0, the fourth bit W4=0, the fifth bit W5=0, the sixth bit W6=1, the seventh bit W7=0, the eighth bit W8=1 in the presented waveform, and the sum of the time of all the bit waveforms is also denoted as T2.

In the foregoing embodiments as shown in fig. 3 and fig. 4, although the LED driving chip can control the LED assembly to display the corresponding gray scale value through the change of each bit weight value of the enable signal OE, for the weight value corresponding to the higher bit number in the enable signal OE, for example, the eighth bit W8 in fig. 4, the duration of the high level is longer, so that the LED assembly keeps the lighting state at the high level, and the LED assembly emits more light and has brighter brightness, which results in that the LED assembly cannot be refreshed in the time corresponding to W8, and further reduces the refresh rate of the LED assembly, and the gray scale information is displayed in a centralized manner, which finally results in a soft overall appearance of the LED display screen, and even generates a screen flickering feeling.

In some embodiments, the electronic device can increase the refresh rate of the LED assembly by "gray-scale breaking", i.e., dividing the OE pulse width into multiple segments for display over the total time period of the enable signal OE. For example, fig. 5 is a schematic diagram of a gray-level scattering manner of the enable signal OE, wherein the enable signal OE shown in fig. 4 is repeatedly transmitted m times within the total time width T2, and the time width of each transmission is changed to T2/m accordingly, so that the human eye can see the LED displaying the same image m times within the total time T2, which is equivalent to increasing the refresh rate recognizable by the human eye by m times of the original refresh rate.

Exemplarily, fig. 6 is a schematic diagram of a time length of an enable signal OE, wherein, taking a time of a first bit W1 in the enable signal OE as an example, in the enable signal OE that is not scattered shown in fig. 3, the time length of the first bit W1 is T1, and in the enable signal OE that is scattered in fig. 6, the first bit W1 is repeatedly transmitted m times within the same total time T2, and is denoted as W1- (1), W1- (2) … … W1-m, at this time, the time length of the first bit W1 transmitted each time is changed to T1/m, and finally, within the total time T2, the time length of the first bit W1 is a sum of m T1/m, and remains unchanged as T1.

In some embodiments, the manner of directly "breaking" the enable signal OE as shown in fig. 5 and fig. 6 may sharply reduce the duration of the minimum high level pulse in the enable signal OE, for example, reduce the time length T1/m of the first bit W1 of the enable signal OE in fig. 6, and accordingly increase the maximum operating frequency required when the LED driving chip emits the enable signal OE to m/T1, which may raise the performance of the LED driving chip, and thus the LED driving cost.

Therefore, fig. 7 is a schematic diagram of another gray scale scattering mode of the enable signal OE, wherein, also taking the 8-bit enable signal OE as an example, when scattering, the first to fifth bits W1-W5 with shorter time duration are retained, while the sixth to eighth bits W8-W6 are scattered and split into m times for repeated transmission, at this time, the total time of each bit still remains unchanged within the total time T2, the first to fifth bits W1-W5 do not scatter but the time duration is unchanged, and the total time durations of the sixth to eighth bits W8-W6 are respectively m time durations T (W6-W8)/m, which also can remain unchanged.

In some embodiments, based on the way of scattering the enable signal OE of the LED driving chip, a larger refresh rate can be obtained, and if it is desired to maintain the refresh rate at the same time, the brightness of the LED assembly display can also be reduced, one way is to reduce the time length of the minimum pulse T1 in the enable signal OE, so that the refresh rate and the number of gray scales can be kept constant. Taking the enable signal OE shown in fig. 7 as an example, on the basis of keeping the waveform and the refresh rate unchanged, the time length of T1 is reduced, and since each bit is 2 times of the previous bit, the time length of the entire enable signal OE is reduced, thereby reducing the brightness of the LED assembly.

However, in practical applications, if the minimum time length T1 in the enable signal OE is reduced to a certain extent, the pulse with a shorter time length will have a serious spike influence on the current flowing through the LED device, thereby causing electromagnetic interference and abnormal display of the LED device, such as tailing, dim-bright and coupling, so that the LED driving chip cannot reduce the brightness of the LED device by infinitely reducing the minimum time length T1 in the enable signal OE, so as to maintain the refresh rate and the gray scale.

Therefore, how to reduce the time length of the pulse in the enable signal to reduce the display brightness of the LED device and maintain the refresh rate and the gray scale is a technical problem to be solved in the art. The embodiment of the application also provides an LED driving method and device, which are used for solving the technical problem. The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 8 is a schematic view of an application scenario of the LED driving method according to an embodiment of the present disclosure, in this scenario, the control device may be a host, a server, and other devices for providing display content to a display screen, where the display screen includes a display driving device and an LED assembly, the display driving device may be a device such as an LED driving chip capable of driving the LED assembly, the control device may send a data signal SDI to the display driving device according to a preset frequency, and the display driving device may drive the LED assembly to display content corresponding to the data signal SDI according to a certain refresh rate after receiving the data signal SDI. In some embodiments, the frequency of the data signal SDI transmitted by the control device to the display driving device may be different from the refresh rate of the display driving device, for example, the frequency of the data signal SDI transmitted by the control device is 60Hz, and the refresh rate of the display driving device is 480Hz, at this time, the control device transmits the data signal SDI1 and the enable signal OE1 to the display driving device at time t10, the display driving device may drive the LED module to repeatedly display the content corresponding to the same data signal SDI1 according to the enable signal OE1 at times t11 and t12 … … t1n to increase the refresh rate, and similarly, after the control device transmits the data signal SDI2 and the enable signal OE2 to the display driving device at times t20, the display driving device drives the LED module to repeatedly display the content corresponding to the data signal SDI2 according to the enable signal OE2 at times t21 and t22 … … n.

Taking the enable signal OE shown in fig. 4 and 7 as an example, when the control device sends the enable signal shown in fig. 4 to the display driving device, the display driving device may perform the scattering processing as shown in fig. 7 after receiving the enable signal, and finally drive the LED assembly to display according to the enable signal OE shown in fig. 7. Fig. 9 is a schematic diagram of repeated transmission of an enable signal provided by the present application, in which waveforms of the enable signal repeatedly transmitted to the LED assembly by the display driving apparatus when the display driving apparatus drives the LED assembly to display according to the enable signal shown in fig. 7 in the scenario shown in fig. 8 are shown, and for convenience of explanation, only the waveform of the first bit W1 in the enable signal shown in fig. 7 is shown as an example. As can be seen from fig. 9, when the display driving apparatus repeats 8 times of the same enable signal after the time T10, at 8 times T11, T12 … … T18, the time length between T11 and T12 is the same as the time length T2 of the enable signal. Meanwhile, between T10 and T20, the time of W1 per repetitive transmission is T1, so that the time length of T1 between T11 and T12 is 8 × T1.

In some embodiments, if the display driving apparatus shown in fig. 8 determines that the brightness of the LED assembly needs to be reduced, the duration of T1 in the transmitted enable signal may be reduced. For example, assuming that the minimum time T1=120ns and the brightness is 500CD for the first bit W1 in the enable signal OE, if the brightness needs to be adjusted to 100DC, the minimum time T1 for the first bit W1 in the enable signal OE may be correspondingly adjusted to 24ns, where the total duration of the first bit W1 is 8 × T1=192ns between T10-T20.

In particular, the display driving apparatus provided in this embodiment further includes a preset threshold, and when the enable signal (denoted as the first enable signal) with the duration reduced by T1 is obtained, a portion (denoted as the first portion) of the first enable signal with the duration T smaller than the preset threshold may be obtained. For example, in the example shown in fig. 9, when it is determined that the duration T1 of the first bit W1 in the enable signal is less than the preset threshold, the display driving apparatus performs the merging process on the first part of every consecutive x first enable signals in the n repeatedly transmitted first enable signals when repeatedly transmitting the first enable signal to the LED assembly n times in the subsequent display process.

For example, fig. 10 is a schematic diagram of the merging process performed on the enable signals provided in the present application, wherein when the enable first enable signal is repeatedly transmitted to the LED assembly 8 times as shown in fig. 9, a minimum time T1 of a first bit W1 of a first portion in the enable signal OE is 24ns, and assuming that the preset threshold is 40ns, since the minimum time T1 of the first bit W1 is smaller than the preset threshold and 24 × 2 is greater than the preset threshold, x =2 is taken, and the merging process is performed on the first portion of every 2 consecutive first enable signals in the 8 repeatedly transmitted first enable signals. In fig. 10, the first part W1- (2) of the enable signal (2) repeatedly transmitted for the second time T12 is combined with the enable signal (1) repeatedly transmitted for the first time, so that when the display driving apparatus repeatedly transmits the enable signal (1) for the first time, the duration of the first part W1 in the enable signal (1), that is, the first bit, is 2 × T1, and the duration of the entire enable signal (1) is the sum T2+ T1 of the original T2 and the time T1 of the first part W1- (2) of the newly added enable signal (2) repeatedly transmitted for the second time. Accordingly, when the display driving apparatus repeatedly transmits the enable signal (2) for the second time, the first bit T1 of the enable signal (2) that has been merged into the first repeatedly transmitted enable signal (1) is not transmitted any more, so that the duration of the entire enable signal (2) is the difference T2-T1 between the original T2 and the time T1 of the first portion W1- (2) to which the first repeatedly transmitted enable signal (1) has been added. By analogy, the display driving apparatus repeatedly sends the enable signals to the LED module 8 times throughout t10-t20, the duration of the first portion W1 in the (1), (3), (5), and (7) th enable signals is 2 × t1=48ns, and the duration of the first portion W1 in the (2), (4), (6), and (8) th enable signals is 0, so that the total duration of the first portion W1 is 192ns throughout t10-t20, and the brightness remains unchanged and remains 100CD before being combined with fig. 9.

In the present application, by taking the above example, n =8,x =2 as an example, when the first enable signal is repeatedly sent to the display driving apparatus, the merging process is performed on the first portion in the first enable signal, in an actual application process, n may be another number, and x may also be any integer smaller than n, so that after merging, the duration T1 x of the first portion is greater than the preset threshold. Meanwhile, the preset threshold value provided by the application can be set and adjusted by a user or a worker of the LED assembly or the display driving device according to the actual situation without limitation.

In some embodiments, as shown in fig. 10, the duration of the first bit W1 of the first enable signal is smaller than the preset threshold, and therefore the first bit W1 is taken as the first part to be merged as an example, it can be understood that, if the durations of the multiple bits in the first enable signal are smaller than the preset threshold, each bit is sequentially taken as the first part to be merged, so that the duration T1 × x of the merged first part is greater than the preset threshold.

To sum up, according to the driving method of the LED module provided in the embodiment of the present application, when the duration corresponding to a part of bits in the enable signal is smaller than the preset threshold, the part of the repeatedly transmitted enable signal is merged, so that under the condition that the total duration is not changed, the duration corresponding to the part of the enable signal that is smaller than the preset threshold in each time of transmission is increased, thereby enabling the display driving apparatus to reduce the brightness of the LED module by reducing the duration T1 of the lowest bit in the enable signal OE, that is, the minimum time length T1, and further ensuring that the time length of the lowest bit in the enable signal OE is not lower than the preset threshold, so as to affect the normal display of the LED module.

Finally, by using the driving method of the LED assembly in the embodiment of the present application, the display driving device can ensure that the width of the minimum pulse in the enable signal OE does not affect normal display when the brightness is reduced, and meanwhile, a higher refresh rate and gray scale are maintained, and under the condition of the same display brightness, a display effect with more uniform brightness and better gray scale linearity can be obtained. In addition, when the minimum time length T1 in the enabling signal is reduced, the display driving device cannot be reduced to be smaller than a preset threshold value to generate surge influence, the display effect of the LED assembly can be improved, the effect of reducing electromagnetic interference can enable the LED assembly to pass EMC authentication more easily, and the display driving device is easy to popularize and implement.

Further, in the foregoing embodiment of the present application, the display driving apparatus performs a combination process on the first enable signal, and the first enable signal may be obtained by processing the second enable signal after the display driving apparatus receives the second enable signal. The longest duration part of the first enable signal is smaller than the longest duration part of the second enable signal.

For example, in some embodiments, after the display driving apparatus obtains the second enable signal shown in fig. 4, the second enable signal shown in fig. 4 is processed and split into the first segment and the second segment to obtain the first enable signal shown in fig. 7. The first segment includes a signal which does not split a part of processed data, namely, a signal corresponding to W5-W1, in the multi-bit data used for indicating the gray-scale value of the LED assembly in the second enabling signal. The second segment comprises signals of the other part of the multi-bit data used for indicating the gray-scale values of the LED assemblies, namely signals corresponding to W8-W6, in the second enabling signals, and in the second segment, the part is divided into m times to be transmitted, and each time of transmission is one m times of the total time W8-W6 of the second segment. The specific splitting manner is shown in the embodiment in fig. 7, and is not described again.

For another example, in other embodiments, after the display driving apparatus acquires the second enable signal shown in fig. 4, the second enable signal shown in fig. 4 is split to obtain the first enable signal shown in fig. 5, where the first enable signal includes m times of repeatedly transmitted second enable signals, and the duration of each transmission is m times of the total time T2 of the second enable signals. The specific splitting manner is shown in the embodiment in fig. 5, and details are not repeated.

In other embodiments, based on the method idea of the above embodiments of the present application, when the display driving apparatus obtains the first enable signal as shown in fig. 5 and transmits the first enable signal as shown in fig. 5 to the LED assembly, even if the transmission is not repeated at this time, the portions smaller than the preset threshold may be combined within the first enable signal. For example, fig. 11 is a waveform diagram of an enable signal provided by the present application, in which a waveform of a first bit W1 in a first enable signal shown in fig. 5 sent by the display driving apparatus is shown as an example, and it can be seen that, in the split first enable signal, the first bit W1 is split into 8 transmissions, a duration of each transmission is T1/8, and a sum of the durations is still T1 within a total time T2 of the first enable signal.

Fig. 12 is a schematic diagram of a combination manner of enable signals provided by the present application, wherein when each transmission time T1/8 of a first bit W1 in a first enable signal shown in fig. 11 is less than a preset threshold and T1/4 is greater than the preset threshold, a first bit W1- (2) of a second repeated transmission in the first enable signal may be combined into the first bit W1- (1) of the first repeated transmission, so that the duration of the first bit W1- (1) of the first repeated transmission is T1/4, the duration of the first bit W1- (2) of the second repeated transmission is 0, and so on, the duration of the first portion W1 of the (1), (3), (5), (7) repeated transmissions is T1/4, the duration of the first portion W1 of the (2), (4), (6), (8) repeated transmissions is 0 in the entire first enable signal, so that the total duration of the first portion W1 of the repeated transmissions is kept as T1, and the total duration of the first portion W1 of the repeated transmissions is not changed from T11 in the entire first enable signal. The embodiment can also prevent the first enable signal from influencing normal display due to the width of the split minimum pulse, and can keep higher refresh rate and gray scale.

In the foregoing embodiments, the method for driving the LED module provided in the embodiments of the present application is described, and in order to implement each function in the method provided in the embodiments of the present application, the driving apparatus of the LED module as the execution subject may include a hardware structure and/or a software module, and implement each function in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

In some embodiments, a driving apparatus of an LED assembly for performing the driving method of the LED assembly provided in the embodiments of the present application may include an obtaining module, a processing module and a driving module, wherein the obtaining module is configured to obtain a first enable signal of the LED assembly to be driven; the processing module is used for determining a first part of the first enabling signal, wherein the duration T1 is less than a preset threshold value; the driving module is used for carrying out merging processing on first parts of every continuous x first enable signals in the n first enable signals when the first enable signals are repeatedly sent to the LED assembly for n times, so that the duration of the first part of the 1 st first enable signal in the x first enable signals is T1 x, the duration of the first part of the first enable signal after the 1 st first enable signal in the x first enable signals is 0, and T1 x is larger than a preset threshold value. For the specific implementation manner and principle of the driving apparatus of the LED assembly, reference may be made to the driving method of the LED assembly in the foregoing embodiment of the present application, and details are not repeated.

It should be noted that, in the driving apparatus of the LED module described above in this embodiment, the division of each component and each module is only a division of a logic function, and all or part of the division may be integrated on a physical entity or may be physically separated in actual implementation. For example, the processing module and the driving module may be the same module, and the modules may all be implemented in the form of software called by the processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. The processing element may be a separate processing element, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus may call and execute the functions of the above determination module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The master control component described herein may be an integrated circuit having signal processing capabilities. In the implementation process, each step or each module of the above method may be completed by an integrated logic circuit of hardware in the main control component or an instruction in the form of software.

For example, these above components/modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, all or part of the method steps performed by the driving means of the LED assembly may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The present application further provides an electronic device, comprising: a processor and a memory; the memory stores a computer program, and when the processor executes the computer program, the processor can be used to execute the method for driving the LED module according to any of the embodiments of the present application.

The present application further provides a computer-readable storage medium storing a computer program, which when executed can be used to execute the method for driving the LED assembly according to any one of the previous embodiments of the present application.

The embodiment of the present application further provides a chip for executing the instruction, where the chip is used to execute the driving method of the LED assembly in any one of the foregoing embodiments of the present application.

The present application further provides a program product, which includes a computer program, where the computer program is stored in a storage medium, and the computer program can be read from the storage medium by at least one processor, and when the computer program is executed by the at least one processor, the method for driving an LED module according to any one of the foregoing embodiments of the present application can be implemented.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A method of driving an LED assembly, comprising:

acquiring a first enabling signal of an LED assembly to be driven; the first enable signal comprises a plurality of consecutive portions, each portion for indicating a one bit data of a gray level value of the LED assembly;

determining a first part of the first enabling signal, wherein the duration T1 is less than a preset threshold value;

when the first enable signals are repeatedly sent to the LED assembly n times, the first parts of every x continuous first enable signals in the n first enable signals are subjected to combination processing, so that the duration of the first part of the 1 st first enable signal in the x first enable signals is T1 x, the duration of the first part of the first enable signal after the 1 st first enable signal in the x first enable signals is 0, and the T1 x is larger than the preset threshold value.

2. The method of claim 1, wherein obtaining the first enable signal for the LED assembly to be driven comprises:

acquiring a second enabling signal of the LED assembly to be driven;

processing the second enabling signal according to a preset rule to obtain a first enabling signal; the longest duration part of the first enable signal is smaller than the longest duration part of the second enable signal.

3. The method of claim 2, wherein the preset rules comprise:

splitting the second enable signal into a first segment and a second segment to obtain the first enable signal;

wherein the first segment comprises: a signal of the second enable signal for indicating a part of the multi-bit data of the gray scale value of the LED assembly;

the second segment includes: and in the second enabling signal, the signal of the other part of the multi-bit data indicating the gray-scale value of the LED assembly is split into m times of repeated transmissions in sequence in the second period, and the duration of each transmission is 1/m of the total time of the second period.

4. The method of claim 2, wherein the preset rules comprise:

and splitting the second enabling signal into m times of repeated sending in sequence, wherein the duration of each sending is 1/m of the total time of the second enabling signal, and obtaining the first enabling signal.

5. The method according to any one of claims 1-4, wherein before acquiring the first enable signal for the LED component to be driven, the method further comprises:

determining to reduce the brightness of the LED assembly to be driven;

and reducing the duration of the part with the shortest duration in the enabling signal of the LED assembly to be driven.

6. A driving apparatus of an LED assembly, comprising:

the acquisition module is used for acquiring a first enabling signal of the LED assembly to be driven; the first enable signal comprises a plurality of consecutive portions, each portion for indicating a one bit data of a gray level value of the LED assembly;

the processing module is used for determining a first part of the first enabling signal, wherein the duration T1 is less than a preset threshold value;

and the driving module is used for merging the first parts of every continuous x first enable signals in the n first enable signals when the first enable signals are repeatedly sent to the LED assembly for n times, so that the duration of the first part of the 1 st first enable signal in the x first enable signals is T1 x, the duration of the first part of the first enable signal after the 1 st first enable signal in the x first enable signals is 0, and the T1 x is greater than the preset threshold value.

7. The apparatus of claim 6, wherein the obtaining module is specifically configured to,

acquiring a second enabling signal of the LED assembly to be driven;

processing the second enabling signal according to a preset rule to obtain a first enabling signal; the longest duration part of the first enable signal is smaller than the longest duration part of the second enable signal.

8. The apparatus of claim 7, wherein the preset rule comprises:

splitting the second enable signal into a first segment and a second segment to obtain the first enable signal;

wherein the first segment comprises: a signal of the second enable signal for indicating a part of the multi-bit data of the gray scale value of the LED assembly;

the second segment includes: and in the second enabling signal, the signal of the other part of the multi-bit data indicating the gray-scale value of the LED assembly is split into m times of repeated transmissions in sequence in the second period, and the duration of each transmission is 1/m of the total time of the second period.

9. The apparatus of claim 7, wherein the preset rule comprises:

and splitting the second enabling signal into m times of repeated sending in sequence, wherein the duration of each sending is 1/m of the total time of the second enabling signal, and obtaining the first enabling signal.

10. The apparatus according to any one of claims 6-9, wherein the processing module is further configured to determine to reduce the brightness of the LED assembly to be driven; and reducing the duration of the part with the shortest duration in the enabling signal of the LED assembly to be driven.

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