A display method and display system of an LED display screen

Abstract

This application discloses a display method and system for an LED display screen, relating to the field of display technology. The method includes: determining the high-efficiency range of the LED chips in the LED display screen; performing grayscale processing on the LED display screen to obtain multi-level grayscale data, each level including multiple calibration levels and corresponding parameters. The parameters include current and time parameters located within the high-efficiency range of the LED chips. Based on the multiple calibration levels and corresponding parameters of each grayscale data level, driving information is sent to a driving device. The driving information includes current and time parameters for controlling each LED chip, causing the LED display screen to operate in a target power consumption state. In this application, the driving information at least includes current and time parameters that cause the LED display screen to operate in the target power consumption state, and the current parameters are located within the high-efficiency range of the LED chips. This allows the driving device to control the LED display screen to operate in the target power consumption state, effectively reducing the power consumption of the LED display screen.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display method and display system for an LED display screen. Background Technology

[0002] Due to the high brightness and high contrast characteristics of light-emitting diodes (LEDs), LEDs have shown great advantages in the display field, and LED TVs, LED conference screens, and other products have gradually become part of people's daily lives.

[0003] Currently, in comparing the power consumption of LED displays and traditional LCD displays of the same resolution, LED displays have an advantage only when the screen is black. During normal operation, the timing controller (TCON) and driver in an LED display account for approximately 10-20% of the total power consumption, while the light emission and heat generated by the LED chips account for over 80%. Therefore, the power consumption of LED displays is significantly higher than that of traditional LCD displays. Furthermore, the heat generated by the LED chips also reduces the lifespan of the LED display, hindering its development. Summary of the Invention

[0004] This application provides a display method and display system for an LED display screen, which reduces the power consumption of the LED display screen during normal operation.

[0005] The technical solution is as follows:

[0006] In a first aspect, a display method for an LED display screen is provided, the LED display screen comprising a plurality of LED beads and a driving device connected to the LED beads, comprising:

[0007] The high energy efficiency range of the LED chips in the LED display screen is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED chips.

[0008] The LED display screen is subjected to grayscale processing to obtain multi-level grayscale data of the LED display screen. Each level of grayscale data includes multiple calibration levels and parameters corresponding to each calibration level. The parameters include current parameters and time parameters. The current parameters are located within the high energy efficiency range of the LED beads.

[0009] Based on the multiple calibration levels of the grayscale data at each level, and the parameters corresponding to each calibration level, driving information is sent to the driving device. The driving information includes the current parameters and time parameters for controlling each LED bead, and the driving information causes the LED display screen to operate in a target power consumption state.

[0010] This application determines the high-efficiency range of LED display chips and performs grayscale processing on the LED display to obtain the current and time parameters of each LED chip at different calibration levels under corresponding grayscale data. The current parameters fall within the high-efficiency range. These current and time parameters can determine the driving information, enabling the driving device to operate the LED display in a target power consumption state. Since the driving information includes at least the current and time parameters that cause the LED display to operate in the target power consumption state, and the current parameters are within the high-efficiency range of the LED chips, the driving device controls the LED display to operate in the target power consumption state, effectively reducing the power consumption of the LED display.

[0011] In one possible implementation of this application, the method includes: determining the grayscale data of each LED bead based on the image to be displayed on the LED display screen.

[0012] The driving information is determined based on multiple calibration levels of the grayscale data at each level, and the parameters corresponding to each calibration level.

[0013] Each LED bead is driven according to the current parameter and the time parameter in the driving information.

[0014] In one possible implementation of this application, sending driving information to the driving device based on multiple calibration levels of the grayscale data at each level and parameters corresponding to each calibration level includes:

[0015] Based on the multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level, the optimal calibration level of each LED bead in the LED display screen is determined under each grayscale data level, and the LED bead driven by the parameters corresponding to the optimal calibration level has the lowest power consumption under the grayscale data.

[0016] Drive information is sent to the drive device according to the parameters corresponding to the optimal calibration level.

[0017] In one possible implementation of this application, determining the optimal calibration level for each LED bead in the LED display screen under each level of grayscale data, based on multiple calibration levels of each level of grayscale data and parameters corresponding to each calibration level, includes:

[0018] Based on the multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level, calculate the power consumption data corresponding to each calibration level of each LED under each grayscale data level;

[0019] Based on the power consumption data corresponding to each calibration level of each LED under each grayscale data level, the calibration level corresponding to the lowest power consumption data is determined as the optimal calibration level of each LED under each grayscale data level.

[0020] In one possible implementation of this application, sending driving information to the driving device based on multiple calibration levels of the grayscale data at each level and parameters corresponding to each calibration level includes:

[0021] Determine the multi-level grayscale data of each of the LED beads within the load area of ​​the driving device;

[0022] Based on the multiple calibration levels of each level of grayscale data for each LED bead within the load area of ​​the driving device, and the parameters corresponding to each calibration level, the power consumption data of the load area of ​​the driving device under each level of grayscale data is determined;

[0023] Based on the power consumption data of the drive device's load area, determine the current parameter when the power consumption data of the drive device's load area is at its lowest.

[0024] The current parameter when the power consumption data of the drive device in the load area is at its lowest, and the time parameter corresponding to each lamp bead under each grayscale data level, are sent to the drive device as the drive information.

[0025] In one possible implementation of this application, determining the power consumption data of the drive device's load area under each level of grayscale data includes:

[0026] Based on the time and current parameters corresponding to each calibration level of each LED under each grayscale data level, the sum of power consumption data of each LED in the load area of ​​the driving device is determined; wherein, the current parameter of each LED in the load area of ​​the driving device is the same.

[0027] In one possible implementation of this application, the method includes: a plurality of drive device load areas forming the LED display screen.

[0028] In one possible implementation of this application, determining the high energy efficiency range of the LED display's LED beads includes: determining the photoelectric characteristics and electro-optical conversion efficiency of the LED beads; determining the energy efficiency curve of the LED beads based on the photoelectric characteristics and the electro-optical conversion efficiency; and determining the high energy efficiency range of the LED beads based on the energy efficiency curve.

[0029] Secondly, a display system for an LED display screen is provided, the display system comprising: a processing device and a display control device;

[0030] The processing device is used to determine the high energy efficiency range of the LED display screen's LED beads, which is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED beads.

[0031] The display control device is used to perform grayscale processing on the LED display screen to obtain multi-level grayscale data of the LED display screen. Each level of grayscale data includes multiple calibration levels and parameters corresponding to each calibration level. The parameters include current parameters and time parameters. The current parameters are located within the high energy efficiency range of the LED beads.

[0032] The display control device is also used to send driving information to the driving device according to the multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level. The driving information includes the current parameters and time parameters for controlling each LED bead. The driving information enables the LED display screen to operate in a minimum target power consumption state.

[0033] In one possible implementation of this application, the display system further includes a driving device and an LED display screen, wherein the driving device, the display control device, and the LED display screen are connected, and the driving device is used to control the LED display screen to display according to the driving information.

[0034] Thirdly, a computer-readable storage medium is provided, wherein instructions are stored in the storage medium, and when the instructions are executed, the display method of the LED display screen as described above is implemented.

[0035] It is understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of an LED display module provided in this application;

[0038] Figure 2 This is a circuit diagram of a driving device provided in this application;

[0039] Figure 3This is a schematic diagram illustrating two methods for driving an LED display screen, PWM and PAM, provided in an embodiment of this application.

[0040] Figure 4 This application provides a driving method for an LED display screen.

[0041] Figure 5 This is a graph showing the relationship between the luminous efficacy and current of an LED lamp bead provided in an embodiment of this application.

[0042] Figure 6 This is an energy efficiency curve of an LED lamp bead provided in an embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0045] It should be understood that "multiple" as mentioned in this application refers to two or more. In the description of this application, unless otherwise stated, " / " indicates "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist, for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, to facilitate a clear description of the technical solutions of this application, the terms "first," "second," etc., are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and that "first," "second," etc., do not necessarily imply differences.

[0046] Before providing a detailed explanation of the embodiments of this application, the application scenarios of these embodiments will be described first.

[0047] Light-emitting diode (LED) displays typically use a scanning method. Figure 1A schematic diagram of an LED display module is provided, including LED beads 103, a driver device 102, and a row decoding chip 101. In other embodiments, the driver device 102 and the decoding chip 103 can be integrated to form a new driver device that can achieve row and column driving. The driver device 102 supports a maximum of 64 rows of LED beads 103, scanning from the first row until the last row is displayed. In the prior art, LED displays use pulse width modulation (PWM) in conjunction with counters, comparators, etc. in the driver circuit to control the timing of current source activation to achieve different grayscale effects. To reduce the power consumption of the LED display, the driver device reduces power consumption by reducing current loss during black screen, low grayscale, and blanking times, depending on the image content being displayed. The problem is that when the LED display is displaying a bright image normally, the low grayscale portion accounts for a very small proportion, resulting in poor power reduction performance of the prior art.

[0048] Figure 2 This is a circuit diagram of a driving device. Signals SDI, LE, and DCLK are used to input grayscale data and commands for display. The GCLK signal, in conjunction with a counter and comparator, controls the timing of the current source. For example, to achieve a grayscale brightness of 1000, the counter counts the number of GCLK signal inputs, while the comparator compares the grayscale data of 1000 with the counter result. When the count is less than 1000, the output buffer opens the current source switch, and the LED lights up. When the counter result is greater than or equal to 1000, the output buffer closes, the current source does not output, and the LED does not light up. With a fixed current, the LED lights up for 1000 GCLK clock cycles; this is the PWM implementation. It's worth noting that during display, blanking and pre-charging circuits are added between scan lines to quickly discharge the charge from the LEDs and improve the speed of turning them on after line switching. This is achieved by the output controller providing different voltage potentials to achieve different effects; therefore, these circuits also consume some power.

[0049] One of the more effective ways to reduce the power consumption of LED displays is to implement low-power control at the driver end. This includes: the driver making pre-judgments based on real-time image data; when the data is a black screen, shutting down the current output of all channels, including pre-charging circuits; when the data is low grayscale, shutting down the circuits of channels for a specific time, including blanking and compensation circuits; and adjusting the on-time of blanking and compensation circuits. For example, during blanking, circuits that don't need to be constantly on, such as the pre-charging circuit, can be shut down, and turned on when the display is nearing completion. Through these methods, actual measurements show that the power consumption of a module can be reduced by 25% to 40% during normal display, with a more significant reduction when the overall display image is dark. However, this power reduction method becomes less effective when displaying bright images such as vivid landscapes, as the low grayscale portion is very small.

[0050] Another effective approach is to modify the circuit structure. Currently, there are two main solutions: the first is to use low-current, high-efficiency LED materials; the second is to use a common-cathode driver and common-cathode LEDs. However, the common-cathode driver solution has limitations. First, common-cathode drivers and common-cathode LEDs have not yet reached commercial scale. Second, using different voltages to drive different LEDs requires additional power modules, increasing costs. Finally, after the voltage drops to a certain value, the current accuracy and driving capability of the common-cathode driver will decrease due to the voltage drop, resulting in image quality loss.

[0051] Therefore, embodiments of this application provide a display method for an LED display screen. The LED display screen includes a driving device that supports pulse width modulation (PWM) and pulse amplitude modulation (PAM), and the driving device employs, for example... Figure 3 This diagram illustrates two methods for driving an LED display: PWM and PAM. Specifically, PWM controls the display time, while PAM controls the display current. This combined approach effectively reduces the LED display's power consumption, eliminates limitations such as blackouts or low grayscale, and avoids loss of grayscale and brightness.

[0052] The following is a detailed explanation of an LED display screen display method and display system provided in the embodiments of this application.

[0053] Figure 4 A display method for an LED display screen is provided. Specifically, the driving device in the LED display screen achieves driving based on both PWM and PAM methods. This driving device can be constructed using... Figure 2 The driving device or driving chip shown can be used to implement the display method. This driving device can be a separate device for driving column channels, or it can be a combined row and column driving chip; no specific limitation is made here. The display method is executed by a processing module located within the LED display screen, or by a processing module located outside the LED display screen. This application embodiment uses a processing module within the LED display screen as an example. This processing module can be implemented using a display controller, such as a receiver card, or it can be implemented using a timing control (TCON) chip; no specific limitation is made here.

[0054] Step 401: The processing module determines the high-efficiency range of the LED display's LED chips. The high-efficiency range is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED chips.

[0055] The high-efficiency range of an LED chip refers to the range within which its luminous efficiency is highest within a given current current range. For example... Figure 5 The figure shows the curve of the luminous efficiency of an LED chip as a function of current. It can be understood that due to differences in manufacturing processes and colors, the curves showing the luminous efficiency as a function of current will differ. The relationship between the relative luminous intensity and current of an LED chip represents its photoelectric characteristics. The curve obtained by increasing the current and collecting luminous intensity data represents the electro-optical conversion efficiency of the LED chip.

[0056] For example, such as Figure 5 Figure (a) shows the relationship between the luminous efficiency and current of LED bead A. It can be seen from the figure that the luminous efficiency decreases as the current increases. If we define the luminous efficiency as 90% or higher as the range where LED bead A has the highest luminous efficiency, then the current range from the origin a1 to the current a2 corresponding to 90% luminous efficiency represents the high-efficiency range of LED bead A. Figure 5 Figure (b) shows the relationship between the luminous efficiency of LED bead B and the current. As can be seen from the figure, the luminous efficiency of LED bead B first increases with increasing current, and then decreases with further increases in current. When the luminous efficiency is set to 90% or higher as the range where LED bead B has the highest luminous efficiency, the range between the two currents b1 and b2 corresponding to 90% luminous efficiency represents the high-efficiency range of LED bead B. The photoelectric characteristics of the LED bead refer to the relationship between the relative luminous intensity of the LED bead and the current. The electro-optical conversion efficiency of the LED bead is a curve obtained by collecting data on the luminous intensity of the LED bead by increasing the current.

[0057] Step 402: The processing module performs grayscale processing on the LED display screen to obtain multi-level grayscale data. Each level of grayscale data includes multiple calibration levels and corresponding parameters for each calibration level. The parameters include current parameters and time parameters, with the current parameters falling within the high-efficiency range of the LED chips.

[0058] In this context, grayscale processing of the LED display screen can be performed either stepwise or by selecting specific grayscale data; no specific limitation is made here. Furthermore, when performing grayscale processing on the LED display screen using selected grayscale data, different grayscale ranges such as low gray, medium gray, and high gray can be used. For each range, one or more grayscale data can be selected to reduce the processing steps. Of course, those skilled in the art will understand that the above-mentioned use of low gray, medium gray, and high gray as selected grayscale data is merely an example. This application can also perform grayscale processing on the LED display screen with a certain grayscale data interval, such as an interval of 10 between two adjacent grayscale data. No specific limitation is made here.

[0059] For each level of grayscale data, multiple calibration levels are defined. This means that at each calibration level, different combinations of current and time parameters are used to ensure that the brightness corresponding to each grayscale level is the same. In other words, when the current parameters are different, the time parameters need to be adjusted to achieve the same brightness. As an example, let's set the grayscale data to 3000. At one calibration level, the current parameter is 2mA, the time parameter is 3000, and the brightness is 100 nits. By changing the current parameters—that is, defining multiple current parameters—with the current values ​​falling within the high-efficiency range of the LED, the time parameters are changed to ensure that the brightness at each calibration level is the same, 100 nits, for each current parameter. For example, under calibration level 1, the current parameter is determined to be 0.5mA, and the brightness is 100 nits when the time parameter is 30000; under calibration level 2, the current parameter is 1mA, and the brightness is 100 nits when the time parameter is 10000; under calibration level 3, the current parameter is 1.5mA, and the brightness is 100 nits when the time parameter is 5000; under calibration level 4, the current parameter is 2mA, and the brightness is 100 nits when the time parameter is 3000, as shown in Table 1 below. It should be noted that in this application, the count corresponding to the time parameter... Preferably, the calculation is based on the high-level duration of the grayscale clock GCLK. For example, in calibration level 1, the time parameter 30000 refers to a high-level duration of 30000 GCLKs; in calibration level 2, the time parameter 10000 refers to a high-level duration of 10000 GCLKs; and so on. In calibration level 3, the time parameter 5000 refers to a high-level duration of 5000 GCLKs. Of course, those skilled in the art will understand that the above time parameter timing method is merely an example and does not limit this application. Grayscale processing of the LED display screen is performed, taking progressive grayscale as an example. Following the above method, multiple calibration levels with different grayscale values ​​such as 4000, 5000, and 6000 are determined. The current parameters and corresponding time parameters in multiple calibration levels ensure the same brightness.

[0060] Table 1

[0061] Calibration content Calibration Level 1 Calibration Level 2 Calibration Level 3 Calibration Level 4 Grayscale data 3000 3000 3000 3000 Time parameters 30000 10000 5000 3000 Current parameters 0.5mA 1mA 1.5mA 2mA

[0062] Step 403: The processing module sends driving information to the driving device based on the multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level. The driving information includes current and timing parameters for controlling each LED chip. The driving information causes the LED display to operate at the target power consumption state.

[0063] The target power consumption state is the state where the power consumption of the LED display is the sum of the power consumption of each LED when each LED bead operates according to specific current and time parameters, and the power consumption is at its minimum. When the target power consumption state is the state where the LED display has the lowest power consumption, each LED bead operates in the state with the lowest power consumption. The power consumption of the LED bead is determined by the time and current parameters. The power consumption is different under each calibration level. The calibration level with the lowest power consumption is determined from multiple calibration levels to determine the current and time parameters of the LED bead.

[0064] This application determines the high-efficiency range of LED display chips and performs grayscale processing on the LED display to obtain the current and time parameters of each LED chip at different calibration levels under corresponding grayscale data. The current parameters fall within the high-efficiency range. These current and time parameters can determine the driving information, enabling the driving device to operate the LED display in a target power consumption state. Since the driving information includes at least the current and time parameters that cause the LED display to operate in the target power consumption state, and the current parameters are within the high-efficiency range of the LED chips, the driving device controls the LED display to operate in the target power consumption state, effectively reducing the power consumption of the LED display.

[0065] In this embodiment, the driving device can be a driving device that supports PWM and point-by-point PAM, or a driving device that supports PWM but does not support point-by-point PAM. It is understood that a driving device supporting PWM and point-by-point PAM can drive each LED with different current and time parameters, while a driving device supporting PWM but not point-by-point PAM provides uniform driving for its load area. For example, in a load area of ​​a driving device containing 16×8 LEDs, all 16×8 LEDs in the load area use the same current parameter, and each LED is driven according to the time parameter corresponding to the current parameter.

[0066] The following will use Example 1, taking a driving device that supports PWM and point-by-point PAM algorithms as an example, to illustrate the embodiments of this application:

[0067] Example 1

[0068] In one possible implementation of this application, the grayscale data of each LED bead is determined based on the image to be displayed on the LED display screen. Driving information is determined based on multiple calibration levels for each grayscale data level and the parameters corresponding to each calibration level. Each LED bead is then driven according to the current and time parameters in the driving information.

[0069] For example, an LED display screen includes three LEDs: LED 1, LED 2, and LED 3. In a frame of an image to be displayed on the LED display screen, the grayscale data of LED 1 is grayscale data 1, the grayscale data of LED 2 is grayscale data 2, and the grayscale data of LED 3 is grayscale data 3. Each grayscale data level includes multiple calibration levels, such as calibration level A, calibration level B, and calibration level C. The processing module determines the calibration level of LED 1, LED 2, and LED 3 according to the calibration level of each grayscale data level. For example, LED 1 is calibration level A for grayscale data 1, LED 2 is calibration level B for grayscale data 2, and LED 3 is calibration level C for grayscale data 3. Based on this, the driving information is determined. The driving information includes the current parameters and time parameters of LED 1, LED 2, and LED 3, that is, the current parameters and time parameters under the corresponding calibration level.

[0070] In step 403 above, the processing module sends driving information to the driving device based on multiple calibration levels for each grayscale data level and the parameters corresponding to each calibration level. This includes: the processing module determining the optimal calibration level for each LED bead in the LED display screen under each grayscale data level, based on the multiple calibration levels for each grayscale data level and the parameters corresponding to each calibration level. The LED bead driven by the parameters corresponding to the optimal calibration level has the lowest power consumption under the grayscale data. The processing module then sends driving information to the driving device based on the parameters corresponding to the optimal calibration level.

[0071] For example, if the LED chips in an LED display are at grayscale data 1, the corresponding power consumption data at calibration level 1 is power consumption data 1; at calibration level 2, it is power consumption data 2; at calibration level 3, it is power consumption data 3; and at calibration level 4, it is power consumption data 4. Since power consumption data 1 is the lowest power consumption among power consumption data 1 to power consumption data 4, calibration level 1 can be determined as the optimal power consumption level for grayscale data 1. Therefore, the current and time parameters corresponding to calibration level 1 can be sent to the driving device as the optimal current and time parameters for grayscale data 1 in the form of driving information. The driving device then provides current to the LED chips according to the optimal current parameters for grayscale data 1, and the driving duration is the duration determined by the optimal time parameters.

[0072] In one possible implementation of this application, the processing module determines the optimal calibration level for each LED chip in the LED display screen under each grayscale level based on multiple calibration levels of each grayscale data and the parameters corresponding to each calibration level. This includes: calculating the power consumption data corresponding to each calibration level of each LED chip under each grayscale data level based on multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level. Based on the power consumption data corresponding to each calibration level of each LED chip under each grayscale data level, the processing module determines the calibration level corresponding to the lowest power consumption data as the optimal calibration level for each LED chip under each grayscale data level.

[0073] As an example, the power consumption data of the LED chip satisfies the following formula:

[0074] P = I 2 Rt

[0075] Where I is the current parameter, t is the time parameter, and R is the resistance. The resistance R remains unchanged in this embodiment. According to Table 1 above and the formula that the power consumption data satisfies, when LED 1 is at a gray level of 3000, based on the time and current parameters under different calibration levels, it can be calculated that when the gray level of LED 1 is 3000, the current parameter is 0.5mA and the time parameter is 30000, the power consumption data of LED 1 is the lowest. Therefore, the power consumption data corresponding to the same gray level data under different calibration levels can be calculated by the above formula, thereby obtaining the optimal calibration level corresponding to different gray levels data. For example, when the gray level data is 3000, the optimal power consumption level of LED 1 is calibration level 1 as shown in Table 1, that is, the current parameter of 0.5mA and the time parameter of 30000 can be provided to the driving device as driving information so that the driving device drives LED 1 to emit light according to the driving information.

[0076] In one possible implementation of this application, it is assumed that the LED display screen has three LEDs, LED 1 to LED 3. In one frame, the grayscale data of LED 1, LED 2, and LED 3 are determined to be 3000, 4000, and 5000, respectively. The processing module determines that the optimal calibration level for LED 1 with grayscale data of 3000 is calibration level 1, the optimal calibration level for LED 2 with grayscale data of 4000 is calibration level 2, and the optimal calibration level for LED 3 with grayscale data of 5000 is calibration level 3. The current and time parameters corresponding to the optimal calibration level of each LED are sent to the driving device. Calibration level 1 corresponds to a time parameter of 30000 and a current parameter of 0.5mA; calibration level 2 corresponds to a time parameter of 10000 and a current parameter of 1mA; and calibration level 3 corresponds to a time parameter of 5000 and a current parameter of 1.5mA. Therefore, the driving device can provide LED 1 with a driving current of 0.5mA for a driving duration of 30000, and provide LED 2 with a driving current of 1mA for a driving duration of 1... 0000, providing a driving current of 1.5mA to LED 3 for a driving duration of 5000, thereby achieving point-to-point driving; it should be noted that in this embodiment, the current parameters of LED 1, LED 2 and LED 3 can be located in the same high energy consumption range or in different energy consumption ranges. This embodiment is only described with the current parameters of LED 1, LED 2 and LED 3 located in the same high energy consumption range. That is, in this embodiment, the multiple calibration levels of LED 1, LED 2 and LED 3 can be the same or different, and this application does not impose any restrictions.

[0077] The driving method in this embodiment is to drive each LED bead point by point according to the optimal current and time parameters. This allows each LED bead to be driven according to the optimal driving information, making the control more precise and thus reducing the power consumption of the entire LED display screen.

[0078] The following will use Embodiment 2 as an example, taking a driving device that supports PWM but does not support the point-by-point PAM algorithm, to illustrate the embodiments of this application:

[0079] Example 2

[0080] In step 403 above, the processing module sends driving information to the driving device based on multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level. This includes: the processing module determining multi-level grayscale data for each LED within the drive device's load area; the processing module determining power consumption data for each grayscale data level of each LED within the drive device's load area based on multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level; the processing module determining the current parameter at the lowest power consumption level in the drive device's load area based on the power consumption data; and sending the current parameter at the lowest power consumption level in the drive device's load area, along with the time parameter corresponding to the current parameter for each LED within each grayscale data level, as driving information to the driving device.

[0081] The drive unit's load area is the array of LED beads that each drive unit can drive.

[0082] As an example, the drive unit's load area includes four LEDs, LED 1 to LED 4. The processing module determines the power consumption data of the drive unit's load area under each grayscale data level based on multiple calibration levels of each grayscale data level of the four LEDs in the drive unit's load area, as well as the parameters corresponding to each calibration level. This power consumption data is the sum of the power consumption data of the four LEDs.

[0083] In one possible implementation of this application, determining the power consumption data of the drive device's load area under each grayscale level includes: the processing module determining the sum of the power consumption data of each LED in the drive device's load area based on the time and current parameters corresponding to each calibration level of each LED under each grayscale level. Wherein, the current parameter of each LED in the drive device's load area is the same.

[0084] As an example, the processing device statistically analyzes the grayscale data of the LED display screen. For instance, within one frame, a driver's load area includes four LEDs: LED 1 has a grayscale value of 3000, LED 2 has a grayscale value of 4000, LED 3 has a grayscale value of 5000, and LED 4 has a grayscale value of 3000. Based on the received current and time parameters corresponding to each grayscale level under different calibration levels, the processing device calculates the total power consumption of the four LEDs within each driver's load area. Since the current parameter is the same for each LED within the driver's load area, the calculation is based on the calibration level. For example, in calibration level 1, the grayscale data of LED bead 1 is 3000, with a current parameter of 0.5mA and a time parameter of 30000; the grayscale data of LED bead 2 is 4000, with a current parameter of 0.5mA and a time parameter of 35000; the grayscale data of LED bead 3 is 5000, with a current parameter of 0.5mA and a time parameter of 40000; and the grayscale data of LED bead 4 is 3000, with a current parameter of 0.5mA and a time parameter of 30000. In calibration level 1, the power consumption data of each LED bead is determined based on the time and current parameters, thus determining the total power consumption of the four LED beads. The calculations are similar for calibration levels 2, 3, and 4. The calibration level with the lowest total power consumption is determined. The current and time data corresponding to the calibration level with the lowest total power consumption are converted into PAM and PWM signals and sent to the driver device to drive the LED display screen.

[0085] Under each calibration level, the power consumption data of the drive unit in the load area satisfies the following formula:

[0086] P = I 2 R(t1+2+3+…+N)

[0087] Where N is the number of LED beads in the load area of ​​each driving device, t1 is the time parameter corresponding to the first LED bead in grayscale data, and I is the current parameter. Since the calibration level is the same, the current parameter is the same.

[0088] In this embodiment, the processing module determines the power consumption data of each driving device's load area. That is, the current parameters of each driving device's load area are the same. By using different time parameters for each LED, the total power consumption of all LEDs in the entire driving device's load area is minimized, thereby reducing the power consumption of the LED display screen.

[0089] It is worth noting that multiple driving devices drive different areas to form an LED display screen. In one embodiment of this application, determining the high-efficiency range of the LED display screen's LED chips includes: a processing device determining the photoelectric characteristics and electro-optical conversion efficiency of the LED chips; the processing device determining the energy efficiency curve of the LED chips based on the photoelectric characteristics and electro-optical conversion efficiency; and the processing device determining the high-efficiency range of the LED chips based on the energy efficiency curve.

[0090] For example, the relationship between the relative luminous intensity and current of an LED chip represents its photoelectric characteristics. The curve obtained by increasing the current and collecting luminous intensity data represents the electro-optical conversion efficiency of the LED chip. As an example... Figure 6 Curve 603 shows the luminous intensity of a red LED as a function of current; curve 602 shows the luminous intensity of a green LED as a function of current; and curve 601 shows the luminous intensity of a green LED as a function of current. (From...) Figure 6 As shown in curve 602, an inflection point appears at a current of 5 mA, which can be interpreted as the electro-optical conversion efficiency starting to decrease at a current of 5 mA. Therefore, the high-efficiency range current is determined to be 0–5 mA.

[0091] This application provides a display system for an LED display screen, including a processing device and a display control device.

[0092] The processing equipment is used to determine the high-efficiency range of the LED display's LED chips, which is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED chips.

[0093] The display control equipment is used to perform grayscale processing on the LED display screen, obtaining multi-level grayscale data. Each level of grayscale data includes multiple calibration levels and corresponding parameters for each calibration level. These parameters include current and time parameters. The current parameters are located within the high-efficiency range of the LED chips.

[0094] The display control device also sends driving information to the driving device based on multiple calibration levels of each grayscale data level and the parameters corresponding to each calibration level. The driving information includes current and timing parameters for controlling each LED chip. The driving information enables the LED display to operate at the target power consumption state.

[0095] In one possible implementation of this application, the processing device and the display control device constitute the processing module in the embodiment of the LED display screen display method described above. The processing device is software-based, and the display control device is a TCON chip or a display controller, such as a receiver card. Specific implementations of the LED display screen display system can be found as follows: Figure 4 The descriptions of steps 401 to 403 shown are not repeated here.

[0096] In one embodiment of this application, the display system further includes a driving device and an LED display screen. The driving device, the display control device, and the LED display screen are connected. The driving device is used to control the LED display screen to display according to driving information. The specific principle of the driving device driving the LED display screen to display according to the driving information is referred to the prior art and will not be described in detail here.

[0097] As an example, taking the TCON chip as the display control device and the driver chip as the driving device, the driving device connects the TCON chip and the LED display screen. The processing device sends the determined grayscale data, calibration level, and the corresponding current and time parameters to the TCON chip. The TCON chip processes and calculates the data, and sends the driving current and driving time corresponding to the LED beads in the LED display screen to the driving device. The driving device drives the LED display screen according to the driving current and driving time.

[0098] Figure 7 This is a schematic diagram of a processing device provided in an embodiment of this application. Figure 7 As shown, the processing device 701 includes: a processor 7011, a memory 7012, and a computer program 7013 stored in the memory 7012 and executable on the processor 7011. When the processor 7011 executes the computer program 7013, it implements the steps in the LED display screen display method in the above embodiments.

[0099] The processing device 701 can be a general-purpose computer device or a special-purpose computer device. In specific implementations, the processing device 701 can be a desktop computer, a portable computer, a network server, a handheld computer, a mobile phone, a tablet computer, a wireless terminal device, a communication device, or an embedded device. This application embodiment does not limit the type of processing device 701. Those skilled in the art will understand that... Figure 7 This is merely an example of the processing device 701 and does not constitute a limitation on the processing device 701. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0100] The processor 7011 can be a Central Processing Unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0101] In some embodiments, memory 7012 may be an internal storage unit of processing device 701, such as a hard disk or memory of processing device 701. In other embodiments, memory 7012 may be an external storage device of processing device 701, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., provided on processing device 701. Furthermore, memory 7012 may include both internal storage units and external storage devices of processing device 701. Memory 7012 is used to store operating system, applications, boot loader, data, and other programs. Memory 7012 can also be used to temporarily store data that has been output or will be output.

[0102] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the steps in the various method embodiments described above.

[0103] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above method embodiments of this application can be implemented by a computer program instructing related hardware. This computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a photographing device / terminal device, a recording medium, a computer memory, ROM (Read-Only Memory), RAM (Random Access Memory), CD-ROM (Compact Disc Read-Only Memory), magnetic tape, floppy disk, and optical data storage devices. The computer-readable storage medium mentioned in this application can be a non-volatile storage medium; in other words, it can be a non-transient storage medium.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0106] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A display method for an LED display screen, the LED display screen comprising a plurality of LED beads and a driving device connected to the LED beads, characterized in that, The method includes: The high energy efficiency range of the LED chips in the LED display screen is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED chips. The LED display screen is subjected to grayscale processing to obtain multi-level grayscale data of the LED display screen. Each level of grayscale data includes multiple calibration levels and parameters corresponding to each calibration level. The parameters include current parameters and time parameters. The current parameters are located within the high energy efficiency range of the LED beads. Based on the multiple calibration levels of the grayscale data at each level, and the parameters corresponding to each calibration level, drive information is sent to the driving device. The drive information includes the current parameters and time parameters for controlling each LED bead. The drive information causes the LED display screen to operate in a target power consumption state. The step of sending driving information to the driving device based on multiple calibration levels of each level of grayscale data and parameters corresponding to each calibration level includes: determining the multi-level grayscale data of each LED within the load area of ​​the driving device; determining the power consumption data of the load area of ​​the driving device under each level of grayscale data based on multiple calibration levels of each level of grayscale data of each LED within the load area of ​​the driving device and parameters corresponding to each calibration level; determining the current parameter when the power consumption data of the load area of ​​the driving device is at its lowest based on the power consumption data of the load area of ​​the driving device; and sending the current parameter when the power consumption data of the load area of ​​the driving device is at its lowest, and the time parameter corresponding to the current parameter for each LED under each level of grayscale data, as the driving information to the driving device.

2. The display method of the LED display screen according to claim 1, characterized in that, The method includes: determining the grayscale data of each LED bead based on the image to be displayed on the LED display screen. The driving information is determined based on multiple calibration levels of the grayscale data at each level, and the parameters corresponding to each calibration level. Each LED bead is driven according to the current parameter and the time parameter in the driving information.

3. The display method of the LED display screen according to claim 1, characterized in that, The determination of power consumption data for the drive device's load area under each level of grayscale data includes: Based on the time and current parameters corresponding to each calibration level of each LED under each grayscale data level, the sum of power consumption data of each LED in the load area of ​​the driving device is determined; wherein, the current parameter of each LED in the load area of ​​the driving device is the same.

4. The display method of the LED display screen according to claim 1 or 3, characterized in that, The method includes: The LED display screen is composed of multiple drive units with load-bearing areas.

5. The display method of the LED display screen according to any one of claims 1 to 3, characterized in that, Determining the high-efficiency range of the LED display screen's LED beads includes: Determine the photoelectric characteristics and electro-optical conversion efficiency of the lamp beads; Based on the photoelectric properties and the electro-optical conversion efficiency, the energy efficiency curve of the lamp bead is determined; The high-efficiency range of the lamp bead is determined based on the energy efficiency curve.

6. A display system for an LED display screen, characterized in that, The display system includes: a processing device and a display control device; The processing device is used to determine the high energy efficiency range of the LED display screen's LED beads, which is determined by the photoelectric characteristics and electro-optical conversion efficiency of the LED beads. The display control device is used to perform grayscale processing on the LED display screen to obtain multi-level grayscale data of the LED display screen. Each level of grayscale data includes multiple calibration levels and parameters corresponding to each calibration level. The parameters include current parameters and time parameters. The current parameters are located within the high energy efficiency range of the LED beads. The display control device is also used to send driving information to the driving device according to multiple calibration levels of each grayscale data level and parameters corresponding to each calibration level. The driving information includes the current parameters and time parameters for controlling each LED bead. The driving information causes the LED display screen to operate in a target power consumption state. The step of sending driving information to the driving device based on multiple calibration levels of each level of grayscale data and parameters corresponding to each calibration level includes: determining the multi-level grayscale data of each LED within the load area of ​​the driving device; determining the power consumption data of the load area of ​​the driving device under each level of grayscale data based on multiple calibration levels of each level of grayscale data of each LED within the load area of ​​the driving device and parameters corresponding to each calibration level; determining the current parameter when the power consumption data of the load area of ​​the driving device is at its lowest based on the power consumption data of the load area of ​​the driving device; and sending the current parameter when the power consumption data of the load area of ​​the driving device is at its lowest, and the time parameter corresponding to the current parameter for each LED under each level of grayscale data, as the driving information to the driving device.

7. The display system according to claim 6, characterized in that, The display system further includes a driving device and an LED display screen. The driving device is connected to the display control device and the LED display screen. The driving device is used to control the LED display screen to display according to the driving information.

8. A computer-readable storage medium, characterized in that, The readable storage medium stores instructions that, when executed, implement the LED display screen display method as described in any one of claims 1 to 5.

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