Display method, storage medium and electronic device of LED display screen

Abstract

The embodiment of the present application discloses a display method, storage medium and electronic device of an LED display screen, belonging to the field of communication technology. The method includes: obtaining a target brightness set, which is a set of target brightness of pixels in a first pixel area corresponding to a target image to be displayed, and the first pixel area includes at least one pixel of the display screen; according to the maximum target brightness in the target brightness set, determining a first current value of the input current of the first pixel area; according to the first current value, controlling the display duration of each pixel in the first pixel area, so that each pixel in the first pixel area displays the target brightness corresponding to the target image. To improve the contrast of the LED display screen.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a display method, storage medium and electronic device of an LED display screen. Background Art

[0002] LED display screens use arranged light emitting diodes (LED) to display images. Compared with liquid crystal displays, they have the advantages of low power consumption, long life, and long viewing distance.

[0003] Since the human eye perceives time with a delay, the purpose of controlling the brightness perceived by the human eye can be achieved by controlling the on-duty ratio of the LED light's on-time and off-time. Currently, LED display screens mainly adjust the LED display brightness by controlling the LED light's on-duty ratio to achieve the effect of picture display.

[0004] However, since the adjustment accuracy of the LED lamp conduction duty cycle is limited by hardware capabilities, the method of adjusting the brightness by adjusting the LED conduction duty cycle will result in insufficient picture contrast when the LED display screen displays a low-brightness picture. Summary of the invention

[0005] The embodiment of the present application provides a display method, storage medium and communication device for an LED display screen, which can solve the problem of insufficient contrast of the displayed image. The technical solution is as follows:

[0006] In a first aspect, an embodiment of the present application provides a display method of an LED display screen, comprising:

[0007] Acquire a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, where the first pixel area includes at least one pixel of the display screen;

[0008] Determining a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set;

[0009] According to the first current value, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0010] Optionally, determining a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set includes:

[0011] The first current value of the input current of the first pixel region is determined according to the mapping relationship and the maximum target brightness. The mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value. In the mapping relationship, the maximum target brightness corresponds to the first current value.

[0012] Optionally, the mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

[0013] Optionally, the current value corresponding to a brightness interval among the multiple brightness intervals is a current value of the input current when a pixel displays the maximum brightness of the brightness interval.

[0014] Optionally, the mapping relationship is a function of how the brightness of the pixel changes with the current value of the input current of the pixel.

[0015] Optionally, controlling each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value includes:

[0016] Determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to a target brightness of each pixel in the first pixel area and the first current value;

[0017] According to the first current value and the display duration of each pixel in the first pixel area per unit time, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0018] Optionally, controlling each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value and a display duration of each pixel in the first pixel area within a unit time includes:

[0019] Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time;

[0020] According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

[0021] In a second aspect, an embodiment of the present application provides a display device, including:

[0022] An acquisition module, configured to acquire a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, where the first pixel area includes at least one pixel of the display screen;

[0023] A control module, configured to determine a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set;

[0024] The control module is also used to control each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value.

[0025] Optionally, the control module is specifically used for:

[0026] The first current value of the input current of the first pixel region is determined according to the mapping relationship and the maximum target brightness. The mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value. In the mapping relationship, the maximum target brightness corresponds to the first current value.

[0027] Optionally, the mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

[0028] Optionally, the current value corresponding to a brightness interval among the multiple brightness intervals is a current value of the input current when a pixel displays the maximum brightness of the brightness interval.

[0029] Optionally, the mapping relationship is a function of how the brightness of the pixel changes with the current value of the input current of the pixel.

[0030] Optionally, the control module is specifically used for:

[0031] Determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to a target brightness of each pixel in the first pixel area and the first current value;

[0032] According to the first current value and the display duration of each pixel in the first pixel area per unit time, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0033] Optionally, the control module is specifically used for:

[0034] Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time;

[0035] According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

[0036] In a third aspect, an embodiment of the present application provides a computer storage medium, which stores a plurality of instructions suitable for being loaded by a processor and executing the above-mentioned method steps.

[0037] In a fourth aspect, an embodiment of the present application provides an electronic device, which may include: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the above-mentioned method steps.

[0038] In an embodiment of the present application, the LED display screen determines the input current value of the pixel area according to the maximum target brightness of the pixel area required for the target image, and controls the display time of each pixel in the pixel area according to the input current value, so that the target brightness required for displaying the target image of each pixel in the pixel area can be improved, and the contrast of the display screen can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a schematic diagram of an LED display screen provided in an embodiment of the present application;

[0041] Figure 2 This is a schematic diagram of a partial circuit for adjusting the brightness of an LED lamp provided in an embodiment of the present application;

[0042] Figure 3 This is another schematic diagram of a partial circuit for adjusting the brightness of an LED lamp provided in an embodiment of the present application.

[0043] Figure 4 is a schematic flow chart of a display method of an LED display screen provided in an embodiment of the present application;

[0044] Figure 5 is a schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0045] Figure 6 is a schematic diagram of the structure of a display screen provided in an embodiment of the present application;

[0046] Figure 7 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0049] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0050] In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0051] Figure 1 It is a schematic diagram of the LED display screen provided in the embodiment of the present application.

[0052] like Figure 1 The LED display screen 101 shown may include a plurality of pixels, such as pixel 102 and pixel 103. A pixel may be composed of red, green and blue LED lamps, or a pixel may be composed of lamps that simultaneously encapsulate red, green and blue LED chips, and the effect of displaying different colors may be achieved by adjusting the display brightness of red, green and blue.

[0053] The LED display screen may include one or more pixel areas. For example, a cabinet may be a pixel area, an LED display screen may be composed of one or more cabinets, and multiple cabinet arrays may be spliced ​​into a whole screen. The cabinet is spliced ​​by an array of LED light panels, and the LED light panels are composed of pixel arrays. A pixel area may be controlled by a driver module, and the driver module controls the brightness of all pixels in a pixel area. Exemplarily, the driver module may be a driver chip. At present, the maximum load unit of the driver chip of the LED display screen is generally 16 channels × 32 scans, and the maximum load unit of the high-scan driver chip is generally 16 channels × 64 scans, that is, a single driver chip can achieve a maximum load of 16 × 64 pixels (pixel, pix).

[0054] Figure 2 This is a partial circuit diagram of the LED lamp brightness adjustment provided in the embodiment of the present application.

[0055] like Figure 2 As shown, the circuit includes LED lamps, such as LED lamps 201 and 202; a power module for supplying power to the LED lamps; a switch tube, such as switch tubes 203 and 204, and the current output end of the power module is connected to the positive pole of the LED lamp, such as the current output of the power module is connected to the positive poles of the LED lamps 201 and 202 respectively. The negative pole of the LED lamp is connected to the output of the control module, such as one output end of the control module is connected to the negative pole of the LED lamp 201, and the other output end is connected to the negative pole of the LED lamp 202. The control module can realize the light emission and non-light emission of the LED lamp 201 and the LED lamp 202 by controlling the conduction and non-conduction of the LED lamp 201 and the LED lamp 202 respectively. In the embodiment of the present application, the control module can also control the current size of each LED lamp.

[0056] Figure 2 The circuit shown is a common anode circuit in which the positive electrodes of the LED lamps are connected to the power module. In a specific embodiment, the LED lamps can also be as follows Figure 3 In the common cathode circuit shown, the cathodes of the LED lamps are all grounded (ground, GND), and different output terminals of the control module are respectively connected to the anodes of each LED lamp. In the embodiment of the present application, Figure 3 The control module shown can control both the power supply of the LED lamp and the current size and the conduction time of the LED lamp.

[0057] At present, LED display screens mainly use fixed current size and control the on-time of LED lights through pulse width modulation (PWM) signals, so that the LED lights can control the brightness perceived by the human eye. Figure 2In the circuit shown, the control module can control the on-time of the LED lamp 201 through the first PWM signal according to the brightness of the LED lamp 201 required for the image to be displayed, and control the on-time of the LED lamp 202 through the second PWM signal according to the brightness of the LED lamp 202 required for the image to be displayed. The control module can control the lighting time of the LED lamp by adjusting the ratio of the high level to the low level (or called the duty cycle) of the PWM signal in a unit time, so that the average brightness of the LED lamp in a unit time reaches the required brightness. Since there is a time delay in the perception time of the human eye, the human eye perceives that the LED lamp emits light continuously and the brightness is the average brightness in a unit time.

[0058] For example Figure 2 In the example, LED lamp 201 is included in a pixel point of the LED display screen. When the LED display screen displays a frame of image, the corresponding pixel point requires the brightness of LED lamp 201 to be 50% of the maximum brightness. The control module can send a PWM signal to the switch tube 203. The PWM signal is high level for half of the time in the image frame. The PWM signal can control the switch tube 203 to be turned on for half of the time in the image frame, so that the LED lamp 201 emits light for half of the time in the image frame, thereby achieving an average brightness of the LED lamp in the image frame of 50% of the maximum brightness.

[0059] However, the adjustment accuracy of the LED light conduction duty cycle is limited by the processing power of the control module. The number of grayscale bits is a basic indicator of the display effect of the LED display screen, which is related to the processing power of the control module. For example, the grayscale bit number of the LED display screen is 13 bits, and the grayscale range is 0 to 2 13 , that is, 0 to 8191. If the maximum brightness of a pixel is L max The minimum step of brightness adjustment that the control module can achieve is L max / 8192, when displaying an image, at least one pixel in the display needs to display the maximum brightness, the full screen can achieve 8192 brightness adjustments, and the contrast of the picture is 1:8191. If the maximum display brightness required to display the image is 50% of the maximum brightness L of the pixel, that is, L max / 2, when the LED display screen displays the image, the full screen can achieve 4096 brightness adjustments, that is, 0 to 4095, the adjustable range is reduced by 1 bit, and the contrast is reduced to 1:4095. max / 4, the adjustable range will be further reduced by 1 bit. This makes the LED display screen have insufficient contrast when displaying low-brightness images. At present, the number of virtual grayscale bits can be increased through software algorithms. Since the number of real grayscale bits of the display screen has not been improved, when the display screen displays low-brightness images, there will be visible flickering in pixels within the screen.

[0060] Since the greater the current, the higher the brightness when the LED light is on for a fixed time, the application proposes that the brightness adjustment accuracy of the display screen when displaying low-brightness images can be improved by adjusting the current size, thereby increasing the contrast and achieving the purpose of improving the display effect of the LED display screen.

[0061] The display method of the LED display screen provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0062] Figure 4 300 is a schematic flow chart of a display method 300 of an LED display screen provided in an embodiment of the present application. The method includes but is not limited to the following steps:

[0063] S301, the LED display screen obtains a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed.

[0064] The first pixel area includes at least one pixel of the display screen.

[0065] The LED display screen can obtain the target brightness of each pixel in the first pixel area required for the target image to be displayed, and obtain a target brightness set.

[0066] When the LED display screen displays multiple frames of images, for example, when the LED display screen displays a video, the target image can be the target image to be displayed in the target frame. Figure 4 The method shown.

[0067] S302, the LED display screen determines a first current value of an input current to a first pixel region according to a maximum target brightness in a target brightness set.

[0068] The LED display screen can determine a first current value corresponding to the maximum target brightness according to the maximum target brightness of the pixels required by the target image, as the current value of the input current of the first pixel area.

[0069] Optionally, the LED display screen can determine the first current value according to a mapping relationship and a maximum target brightness in a target brightness set. The mapping relationship is used to characterize the correspondence between the brightness of a pixel and the current value, in which the maximum target brightness in the target brightness set corresponds to the first current value.

[0070] In one implementation manner, the mapping relationship is a function of how the brightness of a pixel changes with the current value of an input current of the pixel.

[0071] The LED display screen may pre-store the function, and determine the first current value corresponding to the maximum target brightness according to the function and the maximum target brightness in the target brightness set. When the current of the first current value is input into a pixel, the pixel displays the maximum target brightness.

[0072] The LED display screen uses the input current value when the pixel can display the maximum target brightness as the current value of the input current of the first pixel area, so that the corresponding pixel can display the maximum brightness when the LED display screen displays the target image. If the current value input to the first pixel area is less than the input current value when the pixel displays the maximum target brightness, the pixels in the first pixel area will not be able to display the maximum target brightness.

[0073] In another implementation, the mapping relationship includes a correspondence between multiple brightness intervals and multiple current values, the maximum target brightness in the target brightness set belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to a first current value among the multiple current values.

[0074] For example, the mapping relationship may be as shown in Table 1, which includes multiple brightness intervals, where one brightness interval corresponds to a current value, L represents the brightness of the pixel, the current value corresponding to the brightness interval 0<L≤L2 is I1, and the current value corresponding to the brightness interval L2<L≤L3 is I2. target The LED display can determine the maximum target brightness L if it is in the brightness range L2<L≤L3. target The corresponding first current value is I2.

[0075] Table 1

[0076] Brightness range Current value 0<L≤L2 I1 L2<L≤L3 I2 … …

[0077] Optionally, the current value corresponding to one brightness interval among the multiple brightness intervals is the current value of the input current when one pixel displays the maximum brightness of the brightness interval.

[0078] For example, the maximum brightness that a pixel can display is L max , according to the current value corresponding to the measured pixel brightness, the 100% L max , 50%L max and 25% L max The brightness is divided into three brightness intervals, namely 0<L≤L max / 4, L max / 4<L≤L max / 2 and L max / 2<L≤L max, measure the input current value when the maximum brightness in each brightness interval of a pixel is displayed, as the current value corresponding to each pixel interval. The mapping relationship between the brightness of the pixel and the current value can be as shown in Table 2, where the pixel display brightness is L max / 4, the input current value is I(L max / 4), and the pixel display brightness is L max / 2, the input current value is I(L max / 2), and the pixel display brightness is L max , the input current value is I(L max ), where I(L) represents the input current value of the pixel when the display brightness is L.

[0079] Table 2

[0080] Brightness range Current value <![CDATA[0<L≤L max / 4]]> <![CDATA[I(L max / 4)]]> <![CDATA[L max / 4<L≤L max / 2]]> <![CDATA[I(L max / 2)]]> <![CDATA[L max / 2<L≤L max ]]> <![CDATA[I(L max )]]>

[0081] S303, the LED display screen controls each pixel in the first pixel area to display the target brightness corresponding to the target image according to the first current value.

[0082] After the LED display screen determines the first current value of the current input to the first pixel area when displaying the target image, it can control each pixel in the first pixel area to display the brightness corresponding to the target image according to the first current value and the target brightness of each pixel in the first pixel area corresponding to the target picture.

[0083] Optionally, the LED display screen determines the display duration of each pixel in the first pixel area per unit time according to the target brightness of each pixel in the first pixel area corresponding to the target image and the first current value. Moreover, the LED display screen controls each pixel in the first pixel area to display the target brightness corresponding to the target image according to the first current value and the display duration of each pixel in the first pixel area per unit time.

[0084] After the current value input to the first pixel area is determined, the LED display screen can adjust the display duration of each pixel per unit time so that each pixel can display the target brightness required for the target image per unit time.

[0085] For example, the LED display screen determines that the maximum brightness of the pixels in the first pixel area required for the target image is 50%L max , such as the LED display screen can determine the current value of the current input to the first pixel area when displaying the target image as I(L max / 2) according to the mapping relationship shown in Table 2. The target image is the image to be displayed in a video frame. For the pixels in the first pixel area that display the maximum brightness 50%L max , since the input current value is for displaying 50%L maxThe current value at the brightness, the brightness displayed after the pixel is turned on is 50%L max Therefore, the display time of the pixel in the video frame (i.e., an example of unit duration) is equal to the duration of the video frame. In other words, the pixel emits light all the time in the video frame, so that the average brightness of the pixel in the video frame is 50%L max For the next video frame, the LED display screen determines the current value of the current input to the first pixel area according to the maximum brightness value of the pixel display in the first pixel area required for the image to be displayed in the next video frame, and controls the display time of each pixel in the next video frame according to the target brightness corresponding to each pixel, so that each pixel can display the required target brightness in the next video frame.

[0086] Optionally, the LED display screen determines the duty cycle of the pulse width modulation (PWM) signal corresponding to each pixel according to the target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, and the duty cycle of the PWM signal is used to control the display duration of the pixel per unit time. The LED display screen then controls each pixel in the first pixel area to display the target brightness corresponding to the target image according to the first current value and the PWM signal corresponding to each pixel in the first pixel area.

[0087] For example, the target brightness of a pixel in the first pixel area required by the target image is 25% L max , since the current value of the input current to the first pixel area is the current value of the input current to the first pixel area, the pixel displays 50% L max Brightness current value I(L max / 2), the LED display can be determined to display 25% L max The display time of the pixel with the same brightness in the unit time is half of the unit time. So the display brightness of the pixel in the unit time is 25%L max The LED display screen can determine that the duty cycle of the PWM signal input to the pixel in a unit time is 50%, and control the conduction time of the pixel in a unit time to be 50% of the unit time through the PWM signal.

[0088] For example, the grayscale bit number of the LED display is 13 bits, and the current value of the input current in the first pixel area is 50% L of the pixel display. max Brightness current value I(L max / 2), then the LED display screen has an input current value of I(L max / 2) The minimum step of brightness adjustment is 50%L max 1 / 8192 of L max / 16384. This makes the maximum brightness displayed by the first pixel area 50%L maxIt is still possible to adjust 8192 brightness levels, that is, the contrast ratio is 1:8192. As mentioned above, when the current is not adjusted, the maximum brightness of the display is 50%L max Only 4096 brightness levels and a contrast ratio of 1:4096 can be achieved. The embodiment of the present application proposes to determine the input current value according to the maximum brightness, which can improve the brightness adjustment accuracy and increase the contrast ratio of the display screen.

[0089] For another example, the maximum target brightness in the first pixel area required by the target image is 25%L max , the LED display can determine the current value of the input current of the first pixel area as the pixel display 25% L max Brightness current value I(L max / 4), the LED display can be adjusted according to the input current value I(L max / 4) and the target brightness of each pixel in the first pixel area, determine the duty cycle of the PWM signal input to each pixel per unit time, and control the on-time of the pixel per unit time through the PWM signal, so that each pixel displays a corresponding brightness per unit time.

[0090] When the grayscale bit number of the LED display is 13 bits, the current value of the input current in the first pixel area is 25% L max Brightness current value I(L max / 2), then the LED display screen has an input current value of I(L max / 4) when the minimum step of brightness adjustment is 25%L max 1 / 8192 of L max / 32768. This makes the maximum brightness displayed by the first pixel area 25%L max It is still possible to adjust 8192 brightness levels, that is, the contrast remains at 1:8192. However, when the current is not adjusted, the maximum brightness of the display is 25%L max Only 2048 brightness levels and a contrast ratio of 1:2048 can be achieved. Therefore, the embodiment of the present application proposes to determine the input current value according to the maximum brightness, which can improve the brightness adjustment accuracy and increase the contrast ratio of the display screen.

[0091] Optionally, Figure 4 The method shown can be specifically executed by a control module in an LED display screen for controlling the first pixel area to emit light.

[0092] The LED display screen may include multiple pixel areas, and one pixel area in the multiple pixel areas is controlled by a control module to emit light. Each control module of the LED display screen may determine the input current value of the pixel area according to the maximum target brightness of the pixel area corresponding to the control module required by the target image, and control each pixel to display the corresponding target brightness according to the current value.

[0093] For a target image, when the maximum target brightness of a pixel area (denoted as pixel area A) in the LED display is L max When the LED display screen can determine the input current value of the pixel area A is I(L max ), for example, if the grayscale bit number of the LED display is K bits, then the minimum step of brightness adjustment of pixel area A is L max 1 / 2 K When the maximum target brightness of another pixel area (denoted as pixel area B) in the LED display is 50% L max When the LED display screen can determine the input current value of the pixel area B is I(L max / 2), the minimum step of brightness adjustment in pixel area A is 50%L max 1 / 2 K , that is, the minimum step is L max 1 / 2 K+1 This allows the LED display to display a maximum brightness of L max , minimum brightness is 1 / 2 K+1 L max The number of grayscale bits is changed from the original K bits to K+1 bits, and the number of grayscale bits is increased by 1 bit. This can improve the brightness adjustment accuracy and increase the contrast of the display.

[0094] If the LED display can achieve a maximum brightness of 25% L max When the current of the pixel area is adjusted, the LED display can achieve a minimum brightness of 1 / 2 K+2 L max , the number of grayscale bits is K+2. If the LED display can achieve current regulation with smaller brightness, the number of grayscale bits can be further increased to increase the contrast.

[0095] According to the above solution provided in the embodiment of the present application, the input current value is determined according to the maximum target brightness of the pixel area, which can improve the brightness adjustment accuracy and increase the contrast of the display screen.

[0096] Above, combined Figure 4 The display method of the LED display screen provided by the embodiment of the present application is described in detail. The following describes the projection device provided by the embodiment of the present application.

[0097] See also Figure 5 , which shows a schematic diagram of the structure of a display device provided by an exemplary embodiment of the present application. The display device can be implemented as all or part of an LED display screen through software, hardware, or a combination of both. The device includes an acquisition module 401 and a control module 402. Optionally, the display device also includes a memory 403 for storing computer program instructions.

[0098] An acquisition module, configured to acquire a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, where the first pixel area includes at least one pixel of the display screen;

[0099] A control module, configured to determine a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set;

[0100] The control module is also used to control each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value.

[0101] Optionally, the control module is specifically used for:

[0102] The first current value of the input current of the first pixel region is determined according to the mapping relationship and the maximum target brightness. The mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value. In the mapping relationship, the maximum target brightness corresponds to the first current value.

[0103] Optionally, the mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

[0104] Optionally, the current value corresponding to a brightness interval among the multiple brightness intervals is a current value of the input current when a pixel displays the maximum brightness of the brightness interval.

[0105] Optionally, the mapping relationship is a function of how the brightness of the pixel changes with the current value of the input current of the pixel.

[0106] Optionally, the control module is specifically used for:

[0107] Determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to a target brightness of each pixel in the first pixel area and the first current value;

[0108] According to the first current value and the display duration of each pixel in the first pixel area per unit time, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0109] Optionally, the control module is specifically used for:

[0110] Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time;

[0111] According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

[0112] See also Figure 6 , is a schematic diagram of the structure of a display screen 600 provided in an embodiment of the present application. Figure 6 The display screen 600 shown may include at least one processor, such as processor 601, at least one memory, such as memory 602, and at least one LED light board, such as LED light board 603. The display screen 600 may also include a communication bus 604 for realizing connection and communication between components.

[0113] The memory 602 is used to store program instructions, and the processor 601 can read and execute the program instructions in the memory to control the LED light board to display an image.

[0114] Optionally, the display screen 600 may be composed of one or more boxes, and the display screen 600 may specifically include a sending card, a receiving card, and an LED light board. The sending card includes a processor, a video data receiver, and a memory. The sending card is used to control the entire display screen and cut the data of the video source to fit the receiving card for splicing display. The receiving card includes a processor, a video data receiver, and a memory. The receiving card is used to control the LED light board of a single box and is used to receive and process the display data distributed by the sending card.

[0115] exist Figure 6 In the display screen 600 shown, the processor can be used to call the computer program stored in the memory and specifically perform the following operations:

[0116] Acquire a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, where the first pixel area includes at least one pixel of the display screen;

[0117] Determining a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set;

[0118] According to the first current value, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0119] Optionally, determining a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set includes:

[0120] The first current value of the input current of the first pixel region is determined according to the mapping relationship and the maximum target brightness. The mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value. In the mapping relationship, the maximum target brightness corresponds to the first current value.

[0121] Optionally, the mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

[0122] Optionally, the current value corresponding to a brightness interval among the multiple brightness intervals is a current value of the input current when a pixel displays the maximum brightness of the brightness interval.

[0123] Optionally, the mapping relationship is a function of how the brightness of the pixel changes with the current value of the input current of the pixel.

[0124] Optionally, controlling each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value includes:

[0125] Determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to a target brightness of each pixel in the first pixel area and the first current value;

[0126] According to the first current value and the display duration of each pixel in the first pixel area per unit time, each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image.

[0127] Optionally, controlling each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value and a display duration of each pixel in the first pixel area within a unit time includes:

[0128] Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time;

[0129] According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

[0130] See also Figure 7 , is a schematic diagram of the structure of an electronic device 700 provided in an embodiment of the present application. Figure 7 As shown, the electronic device 700 may include: at least one processor 701, a user interface 703, a memory 705, and at least one communication bus 702. The processor 701 may execute instructions to control the user interface 703 to perform the display method described in the method embodiment. The user interface 703 may include a display screen (Display), a camera (Camera), and the optional user interface 703 may also include a standard wired interface and a wireless interface.

[0131] The communication bus 702 is used to realize the connection and communication between these components.

[0132] Optionally, the electronic device 700 may further include at least one network interface 704 .

[0133] The network interface 704 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0134] The electronic device 700 can perform the above Figure 3 The method steps of the embodiment shown in the figure can be found in the specific implementation process. Figure 3 The specific description of the illustrated embodiment will not be repeated here.

[0135] Among them, the processor 701 may include one or more processing cores. The processor 701 uses various interfaces and lines to connect various parts within the entire electronic device 700, and executes various functions and processes data of the electronic device 700 by running or executing instructions, programs, code sets or instruction sets stored in the memory 705, and calling data stored in the memory 705. Optionally, the processor 701 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 701 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 701, and it can be implemented separately through a chip.

[0136] Among them, the memory 705 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 705 includes a non-transitory computer-readable storage medium. The memory 705 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 705 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned method embodiments, etc.; the data storage area may store data involved in the above-mentioned method embodiments, etc. The memory 705 may optionally be at least one storage device located away from the aforementioned processor 701. As Figure 7 As shown, the memory 705 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a screen projection application.

[0137] The present application also provides a computer storage medium, which can store multiple instructions, and the instructions are suitable for being loaded and executed by a processor as described above. Figure 3 The method steps of the embodiment shown in the figure can be found in the specific implementation process. Figure 3 The specific description of the illustrated embodiment will not be repeated here.

[0138] The device where the storage medium is located may be a communication device.

[0139] The hardware part of the communication equipment can be composed of a touch display module, an intelligent processing system (including a controller) and other parts, which are combined together by an overall structural part and supported by a dedicated software system. The touch display module includes a display screen, a touch component and a backlight component. The backlight component is used to provide a backlight source for the display screen. The display screen generally uses a liquid crystal display device for displaying pictures. The touch component is set on the display screen or at the front end of the display screen to collect the user's touch operation data and send the collected touch operation data to the intelligent processing system for processing.

[0140] In actual use, the display screen of the communication device displays the screen data. When the user clicks on the content displayed on the display screen with a touch object such as a finger or a stylus, for example, clicks on a graphic button displayed on the display screen, the touch component of the smart interactive tablet will collect the touch data, and the touch component will convert the touch data into coordinate data of the touch point and send it to the intelligent processing system, or send it to the intelligent processing system and convert it into coordinate data of the touch point by the intelligent processing system. After the intelligent processing system obtains the coordinate data of the touch point, it implements the corresponding control operation according to the pre-set program, drives the display content to change, and realizes a variety of display and operation effects.

[0141] Touch components can be divided into five basic categories based on technical principles: vector pressure sensing technology touch components, resistance technology touch components, capacitance technology touch components, electromagnetic technology touch screens, infrared technology touch components, and surface acoustic wave technology touch components. According to the working principle of the touch component and the medium for transmitting information, the touch component can be divided into four categories: resistance, capacitance induction, electromagnetic induction, infrared, and surface acoustic wave.

[0142] When the user touches the display screen with a finger or a pen, the touch component can collect data from the touch point and send it to the intelligent processing system, and then use the built-in software of the intelligent processing system to implement different functional applications, thereby realizing touch control of the intelligent processing system.

[0143] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0144] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0145] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0146] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0147] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0148] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0149] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0150] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0151] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A display method of an LED display screen, It is characterized in that include: Acquire a target brightness set, where the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, where the first pixel area includes at least one pixel of the display screen; Determining a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set; controlling the display duration of each pixel in the first pixel area according to the first current value, so that each pixel in the first pixel area displays a target brightness corresponding to the target image; The step of controlling the display duration of each pixel in the first pixel area according to the first current value so that each pixel in the first pixel area displays a target brightness corresponding to the target image includes: determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to a target brightness of each pixel in the first pixel area and the first current value; Each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image according to the first current value and the display duration of each pixel in the first pixel area per unit time.

2. The method according to claim 1, It is characterized in that The determining, according to the maximum target brightness in the target brightness set, a first current value of the input current to the first pixel region comprises: According to the mapping relationship and the maximum target brightness, a first current value of the input current of the first pixel area is determined, the mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value, and the maximum target brightness in the mapping relationship corresponds to the first current value.

3. The method according to claim 2, It is characterized in that The mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

4. The method according to claim 3, It is characterized in that The current value corresponding to one of the plurality of brightness intervals is a current value of an input current when one pixel displays a maximum brightness of the one brightness interval.

5. The method according to claim 2, It is characterized in that The mapping relationship is a function of the brightness of the pixel changing with the current value of the input current of the pixel.

6. The method according to any one of claims 1 to 5, It is characterized in that The controlling each pixel in the first pixel area to display a target brightness corresponding to the target image according to the first current value and the display duration of each pixel in the first pixel area per unit time comprises: Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time; According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

7. A display device of an LED display screen, It is characterized in that include: An acquisition module, configured to acquire a target brightness set, wherein the target brightness set is a set of target brightnesses of pixels in a first pixel area corresponding to a target image to be displayed, wherein the first pixel area includes at least one pixel of the display screen; A control module, configured to determine a first current value of an input current to the first pixel region according to a maximum target brightness in the target brightness set; The control module is further used to control the display duration of each pixel in the first pixel area according to the first current value, so that each pixel in the first pixel area displays a target brightness corresponding to the target image; The control module is specifically used for: determining a display duration per unit time of each pixel in the first pixel area corresponding to the target image according to the target brightness of each pixel in the first pixel area and the first current value; Each pixel in the first pixel area is controlled to display a target brightness corresponding to the target image according to the first current value and the display duration of each pixel in the first pixel area per unit time.

8. The device according to claim 7, It is characterized in that The control module is specifically used for: According to the mapping relationship and the maximum target brightness, a first current value of the input current of the first pixel area is determined, the mapping relationship is used to characterize the correspondence between the brightness of the pixel and the current value, and the maximum target brightness in the mapping relationship corresponds to the first current value.

9. The device according to claim 8, It is characterized in that The mapping relationship includes a correspondence relationship between multiple brightness intervals and multiple current values, the maximum target brightness belongs to a first brightness interval among the multiple brightness intervals, and the first brightness interval corresponds to the first current value among the multiple current values.

10. The device according to claim 9, It is characterized in that The current value corresponding to one of the plurality of brightness intervals is a current value of an input current when one pixel displays a maximum brightness of the one brightness interval.

11. The device according to claim 8, It is characterized in that The mapping relationship is a function of the brightness of the pixel changing with the current value of the input current of the pixel.

12. The device according to any one of claims 7 to 11, It is characterized in that The control module is specifically used for: Determine a duty cycle of a pulse width modulation (PWM) signal corresponding to each pixel according to a target brightness of each pixel in the first pixel area corresponding to the target image and the first current value, wherein the duty cycle of the PWM signal is used to control a display duration of the pixel in a unit time; According to the first current value and the PWM signal corresponding to each pixel in the first pixel area, each pixel in the first pixel area is controlled to display the target brightness corresponding to the target image.

13. A computer storage medium, It is characterized in that The computer storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the display method according to any one of claims 1 to 6.

14. A computer program product comprising a computer program, It is characterized in that When the computer program is executed by a processor, the display method according to any one of claims 1 to 6 is implemented.

15. An electronic device, It is characterized in that include: A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the display method as claimed in any one of claims 1 to 6.

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