CN114783355A - LED display method and device, electronic equipment and readable storage medium - Google Patents

LED display method and device, electronic equipment and readable storage medium Download PDF

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Publication number
CN114783355A
CN114783355A CN202210334220.2A CN202210334220A CN114783355A CN 114783355 A CN114783355 A CN 114783355A CN 202210334220 A CN202210334220 A CN 202210334220A CN 114783355 A CN114783355 A CN 114783355A
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frame
led display
picture
period
display screen
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CN114783355B (en
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褚建平
韦桂锋
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Xian Novastar Electronic Technology Co Ltd
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Xian Novastar Electronic Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The invention relates to the field of videos and discloses an LED display method, an LED display device, electronic equipment and a readable storage medium, wherein the method comprises the following steps: the controller obtains the frame frequency of the video source and the exposure time when the video camera shoots. And determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the time length for displaying the frame of picture is less than or equal to the exposure time length. And playing the video source on the LED display screen according to the duration of displaying one frame of picture on the LED display screen. When the camera shoots, each frame of picture can be completely shot, so that the problem of poor shot picture effect caused by picture gray scale loss, picture gray scale hyperchromia and the like is solved, and the shooting effect is improved.

Description

LED display method and device, electronic equipment and readable storage medium
Technical Field
The present application relates to the field of video, and in particular, to an LED display method and apparatus, an electronic device, and a readable storage medium.
Background
Extended Reality (xR) refers to the creation of a real and virtual combined, human-machine interactive environment by computer technology and wearable devices. xR includes Virtual Reality (Virtual Reality), Augmented Reality (AR), and Mixed Reality (MR).
When the xR is applied, the video content may be displayed as a background through a light-emitting diode (LED) display screen, and the LED display screen and the main body are photographed through a camera.
However, when the LED display screen is shot by the camera at present, the problems of poor shot picture effect caused by picture gray scale loss, picture gray scale color increase and the like exist.
Disclosure of Invention
The present application mainly aims to provide an LED display method, an LED display device, an electronic device, and a readable storage medium, and aims to solve the problem that when an LED display screen is shot by a camera, the shot picture effect is not good.
In a first aspect, the present application provides an LED display method applied to an augmented reality system, where the augmented reality system includes an LED display screen, a controller and a camera, the controller is connected to the camera and the LED display screen, respectively, and the controller receives a video source and plays the video via the LED display screen, the method includes: the controller obtains the frame frequency of the video source and the exposure time when the video camera shoots. And determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the time length for displaying the frame of picture is less than or equal to the exposure time length. And playing the video source on the LED display screen according to the duration of displaying one frame of picture on the LED display screen.
In some embodiments, the frame frequency corresponds to a frame period including a first period and a second period, a duration of the first period is the same as the exposure duration, and a sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency.
Determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the method comprises the following steps: and acquiring corresponding first display parameters in a preset parameter set according to the frame frequency and the exposure time. And displaying one frame of picture on the LED display screen at least once in a first period according to the first display parameter. And acquiring a second display parameter according to the time length relation between the first time period and the second time period. And displaying one frame of picture on the LED display screen at least once in a second time interval according to the second display parameter. And when the black field time between two frames of pictures is greater than a first preset threshold value, the black field time is averagely distributed into the blanking time, so that the black field time is less than a second preset threshold value.
In some embodiments, the number of times of displaying a frame on the LED display screen in a frame period corresponding to the frame frequency is an even number, and a time period of displaying a frame each time is less than or equal to the exposure time period.
In some embodiments, the number of times of displaying a frame of picture on the LED display screen is an even number, and a time period of displaying a frame of picture each time is less than or equal to the exposure time period, including: by controlling the Gclk frequency, the blanking time and the timing between each refresh, the number of times of displaying a frame of picture in the exposure time is an integral number of times.
In a second aspect, the present application further provides an LED display device for an augmented reality system, the augmented reality system includes an LED display screen, a controller and a camera, the controller is connected with the camera and the LED display screen respectively, the controller receives a video source and plays through the LED display screen, and the device includes:
and the acquisition module is used for acquiring the frame frequency of the video source and the exposure time when the video camera shoots. And the determining module is used for determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the time length for displaying the frame of picture is less than or equal to the exposure time length. And the playing module is used for playing the video source on the LED display screen according to the duration of one frame of picture displayed on the LED display screen.
In some embodiments, the frame frequency corresponds to a frame period including a first period and a second period, a duration of the first period is the same as the exposure duration, and a sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency.
And the determining module is specifically used for acquiring a corresponding first display parameter in a preset parameter set according to the frame frequency and the exposure duration. And displaying one frame of picture on the LED display screen at least once in a first period according to the first display parameter. And acquiring a second display parameter according to the time length relation between the first time period and the second time period. And displaying one frame of picture on the LED display screen at least once in a second time interval according to the second display parameter. And when the black field time between two frames of pictures is greater than a first preset threshold value, the black field time is averagely distributed into the blanking time, so that the black field time is less than a second preset threshold value.
In some embodiments, the number of times of displaying a frame on the LED display screen in a frame period corresponding to the frame frequency is an even number, and a time period for displaying a frame each time is less than or equal to the exposure time period.
In some embodiments, the determining module is specifically configured to control the Gclk frequency, the blanking time, and the timing between each refresh and the refresh, so that the number of times of displaying one frame of picture in the exposure duration is an integer.
In a third aspect, the present application further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method provided in the first aspect when executing the computer program.
In a fourth aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements the method as provided by the first aspect described above.
The application provides an LED display method, an LED display device, electronic equipment and a readable storage medium. The frame frequency of a video source and the exposure time of the video camera during shooting are obtained. And then determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, so that the time length for displaying the frame of picture is less than or equal to the exposure time length. And then, according to the duration of displaying one frame of picture on the LED display screen, playing a video source on the LED display screen. Therefore, when the camera shoots, each frame of picture can be completely shot, the problem that the shot picture effect is poor due to picture gray scale loss, picture gray scale hyperchromia and the like is solved, and the shooting effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of an LED display method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of an LED display method according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of implementing S220 in an LED display method according to an embodiment of the present disclosure;
FIG. 4 is a schematic timing diagram when PartA is not greater than PartB in an LED display method provided by an embodiment of the application;
fig. 5 is a schematic timing diagram when PartA > PartB in an LED display method according to an embodiment of the present application;
fig. 6 is a schematic flowchart of another implementation S220 in an LED display method according to an embodiment of the present application;
FIG. 7 is a schematic diagram of another exposure scenario in an LED display method according to an embodiment of the present application;
fig. 8 is a schematic block diagram of an LED display device provided in an embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic view of an application scenario of an LED display method according to an embodiment of the present application.
In some embodiments, referring to fig. 1, in this scenario, an augmented reality system is included, and the augmented reality system includes a controller 11, an LED screen 12, and a camera 13. The controller 11 is connected to a camera 13 and an LED display screen 12. When the camera 13 and the controller 11 are connected, they may be connected by means of a Genlock (Genlock). The controller 11 receives a video source and plays it through the LED display 12, and the camera 13 photographs the LED display 12 and transmits the photographed video data to the controller 11. The controller 11 may forward the received captured video data to a computer, a cloud, etc., without limitation.
Fig. 2 is a schematic flowchart of an LED display method according to an embodiment of the present disclosure. The LED display method provided in this application may be applied to the controller 11 in fig. 1, and the controller 11 may be a separate card sending device, or may also be a device integrating the card sending function, which is not limited herein.
Referring to fig. 2, the LED display method includes:
s210, the controller acquires the frame frequency of the video source and the exposure time when the video camera shoots.
In some embodiments, the frame rate of the video source may be obtained according to the attributes of the video source when the video source is received. Because the controller is connected with the camera through Genlock, the frame frequency of the video source received by the controller can be synchronous with the shooting frame frequency of the camera, and then the exposure time when the camera shoots is obtained through calculation according to the shooting frame frequency of the camera. For example, it is determined by the GenLock apparatus that the photographing frame rate of the camera is synchronized to 24hz, and the shutter angle is set to 172.8 degrees. The exposure time period during which the camera takes the picture (i.e. the on exposure time for each row of camera photosensitive elements) is 1/24 x 172.8/360-20 ms.
And S220, determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length.
In some embodiments, the duration of displaying one frame of picture is less than or equal to the exposure duration. The display times of a frame in one frame period can be obtained after the time length for displaying the frame is determined. For example, referring to the exposure time shown in S210, a frame rate is 1/24 seconds (about 41.2ms), the exposure time is 20ms, and the duration of displaying a frame of picture on the LED display screen is at least 20ms, and the display is refreshed 1 time. Alternatively, the time period for displaying one frame of picture may be 10ms, and the refresh display may be performed 2 times, or the time period for displaying one frame of picture may be 5ms, and the refresh display may be performed 4 times.
And S230, playing a video source on the LED display screen according to the duration of one frame of picture displayed on the LED display screen.
In some embodiments, there is also a time loss between two refreshes of the display. Therefore, when the controller plays the video source on the LED display screen, it is further required to determine specific playing parameters according to the duration of displaying a frame of picture. The playing parameters include global clock (Gclk) frequency, blanking time, and timing between each refresh, black field time, etc. When the video source is played according to the playing parameters, the exposure time of the camera and the single complete refreshing time can be in integral multiple relation by adjusting the time loss.
According to the LED display method, the frame frequency of a video source and the exposure time of a camera during shooting are obtained. And then determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, so that the time length for displaying the frame of picture is less than or equal to the exposure time length. And then, according to the duration of displaying one frame of picture on the LED display screen, playing a video source on the LED display screen. Therefore, when the camera shoots, each frame of picture can be completely shot, the problem that the shot picture effect is poor due to picture gray scale loss, picture gray scale hyperchromia and the like is further reduced, and the shooting effect is improved.
The embodiments described in S210 to S230 are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The flow chart shown in fig. 2 is merely an illustration, and does not necessarily include all of the contents and operations/steps, nor must it be performed in the order described. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Fig. 3 is a schematic flowchart illustrating implementation of S220 in an LED display method according to an embodiment of the present disclosure.
In some embodiments, the frame frequency corresponds to a frame period including a first period and a second period, the first period is the same as the exposure duration, and a sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency.
Referring to fig. 3, determining the duration of displaying a frame of picture on the LED display screen according to the frame frequency and the exposure duration includes:
and S221, acquiring a corresponding first display parameter in a preset parameter set according to the frame frequency and the exposure duration.
In some embodiments, a plurality of sets of display parameters may be preset according to a commonly used frame rate and stored in the parameter set. For example, common frame rates may include 24Hz, 25Hz, 30Hz, 48Hz, 50Hz, 60Hz, 72Hz, 75Hz, 90Hz, 96Hz, 100Hz, 120Hz, 144Hz, 240Hz, and the like. The display parameters may include visual refresh rate, blanking time, line feed time, and associated companion driver IC registers. The register of the driving IC is used for configuring relevant parameters of the driving IC, and the IC is enabled to work in a preset state. When the frame frequency of the video source received by the controller is the above common frame frequency, the first display parameter corresponding to the frame frequency may be acquired in a preset parameter set according to the frame frequency. The video source is displayed through the LED within the first time period according to the first display parameter, so that the picture shot by the camera has a good effect.
In some embodiments, if the frame rate of the video source is 60Hz and the exposure time of the video camera is 1/96 seconds, the duration of the first time interval is 1/96 seconds, and the duration of the second time interval is 1/60 seconds minus 1/96 seconds.
S222, displaying at least one frame of picture on the LED display screen in a first period according to the first display parameter.
In some embodiments, referring to the example in S221, if the exposure time is 1/96 seconds, the display parameter corresponding to 96Hz may be used as the first display parameter, and at least one frame of picture is displayed on the LED display screen according to the display parameter corresponding to 96Hz in the first period.
And S223, acquiring a second display parameter according to the time length relation between the first time period and the second time period.
In some embodiments, referring to the example in S221, since the duration of the second period is (1/60-1/96) seconds, i.e., 1/160 seconds (160 Hz). The frame rate is not set in advance, and therefore, it is necessary to calculate and acquire the second display parameter for displaying the video source in the second period.
In some embodiments, the controller comprises a receiving card, and the receiving card is used for receiving the video data and controlling the LED display screen to display.
Fig. 4 is a schematic timing diagram when PartA is not greater than PartB in an LED display method provided in an embodiment of the present application.
In some embodiments, when the duration of the first period (PartA) is less than or equal to the duration of the second period (PartB), i.e., PartA ≦ PartB, the timing of receiving the card may refer to fig. 4. The controller acquires a field frequency period value of PartA through acquisition and calculation and sends the field frequency period value to the receiving card, and the receiving card acquires corresponding field frequency period parameters from a plurality of groups of display parameters prestored in the controller and is used for controlling the receiving card to display.
Fig. 5 is a timing diagram of part a > part b in an LED display method according to an embodiment of the present application.
In some embodiments, when PartA > PartB, the timing of receiving the card may refer to fig. 5. When the receiving card main controller realizes PartB, the data transmission part is not executed, and only the S-PWM wave transmission of the period of the refresh times (RefNumPerVs) of each frame specified in the Gclk clock domain is realized. The refnumbervs value for a particular PartB is calculated from the controller in equal proportion with reference to the refnumbervs value for part of PartA.
And S224, displaying at least one frame of picture on the LED display screen in a second time interval according to the second display parameters.
And S225, when the black field time between two frames of pictures is greater than a first preset threshold value, averagely distributing the black field time into blanking time so as to enable the black field time to be less than a second preset threshold value.
In some embodiments, the black field time refers to the interval time between frames, typically around 200 μ s, sent to the drive IC drive waveforms. The blanking time is the spare implementation time between the driving waveforms sent to the driving ICs and the line feed signals. When the black field time is too large, e.g., greater than a first preset threshold (400 μ s), the black field time may be equally allocated into the blanking time to reduce the black field time so that the black field time is satisfactory, e.g., less than a second preset threshold (200 μ s).
Wherein the frame-to-frame period is subject to some error, i.e. frame period jitter is present. The frame period jitter may affect the measurement of the black field time, so it is necessary to take the frame jitter factor into account when the black field is automatically adjusted, and the black field time can be reset when the sync signal input of the abnormal frame is received.
The embodiments described in S221 to S225 are some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The flow chart shown in fig. 3 is merely an illustration, and does not necessarily include all of the contents and operations/steps, nor is it necessarily performed in the order described. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution order may be changed according to the actual situation.
Fig. 6 is a schematic flowchart of another implementation S220 in an LED display method according to an embodiment of the present application.
Referring to fig. 6, determining the time and the number of times a frame of a picture is displayed on the LED display screen according to the frame frequency and the exposure time includes:
and S226, controlling the Gclk frequency, the blanking time and the time sequence between each refreshing and refreshing so that the number of times of displaying one frame of picture in the exposure time length is an integral number.
In a frame period corresponding to the frame frequency, the number of times of displaying a frame of picture on the LED display screen is even, and the time length of displaying the frame of picture each time is less than or equal to the exposure time length.
Fig. 7 is a schematic view of another exposure scenario in an LED display method according to an embodiment of the present application.
Referring to fig. 7, fig. 7 shows the correspondence between the camera exposure and the actual display frame of the LED display screen during the application process. Wherein, the receiving card will automatically adjust the refresh times of the driving IC of a complete frame (i.e. Ref in the figure, each Ref being a refresh) to be an integer multiple of 2 according to the frame frequency. Because each line of photosensitive sensors of the camera are opened in sequence, each line of the photosensitive sensors is opened with a slight delay, and the exposure time for opening each line of the photosensitive sensors is fixed, a parallelogram frame at the upper half part in the figure is formed. The on time of each line of sensors is determined according to the frame rate and shutter angle set by the camera.
For example, the camera shooting frame rate is synchronized to 24hz by the GenLock device, the shutter angle is set to 172.8 degrees, and the exposure time for each line of the camera is 1/24 × 172.8/360 ═ 20 ms.
In order to ensure the integrity of the image acquired by the camera, the receiving card can automatically adjust the driving IC of the LED display screen so as to ensure that the complete and fixed refreshing times are completed within the opening exposure time of each line of light sensation sensor.
In order to achieve the expectation, the receiving card may automatically calculate the exposure time of each line of the optical sensing devices of the camera according to the frame frequency and the shutter angle of the video source, and adjust the Gclk frequency, the blanking time, and the timing sequence between each refresh and the refresh (i.e., the shaded portion in fig. 7), so that the exposure time of the camera and the single complete refresh time are in an integral multiple relationship, so that after the first line of the optical sensing devices of the camera is turned on and the last line of the optical sensing devices is turned on, the driving ICs in the exposure period achieve complete refresh, and the refresh times are the same (i.e., the portion a in fig. 7).
Meanwhile, in order to avoid the flicker of the LED screen when the human eyes watch the LED screen, the frame can still be displayed in the time of one frame except the exposure time of the camera shooting. For example, referring to part a' in fig. 7, the LED receiving card can control the driving IC to implement the time when the camera is not exposed, so as to ensure the dual high image quality requirements of human eyes and machine vision.
Fig. 8 is a schematic block diagram of an LED display device according to an embodiment of the present application.
Referring to fig. 8, the LED display device is applied to an augmented reality system, the augmented reality system includes an LED display screen, a controller and a camera, the controller is connected with the camera and the LED display screen respectively, the controller receives a video source and plays through the LED display screen, and the device includes:
the obtaining module 301 is configured to obtain a frame frequency of a video source and an exposure duration when the video camera shoots.
The determining module 302 is configured to determine a duration of displaying a frame of picture on the LED display screen according to the frame frequency and the exposure duration, where the duration of displaying the frame of picture is less than or equal to the exposure duration.
The playing module 303 is configured to play a video source on the LED display screen according to a duration of displaying a frame of picture on the LED display screen.
In some embodiments, the frame period corresponding to the frame frequency includes a first period and a second period, the duration of the first period is the same as the exposure duration, and the sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency.
The determining module 302 is specifically configured to acquire a corresponding first display parameter in a preset parameter set according to the frame frequency and the exposure duration. And displaying one frame of picture on the LED display screen at least once in a first period according to the first display parameter. And acquiring a second display parameter according to the time length relation between the first time period and the second time period. And displaying one frame of picture on the LED display screen at least once in a second time interval according to the second display parameter. And when the black field time between two frames of pictures is greater than a first preset threshold value, the black field time is averagely distributed into the blanking time, so that the black field time is less than a second preset threshold value.
In some embodiments, the number of times of displaying a frame on the LED display screen in a frame period corresponding to the frame frequency is an even number, and a time period for displaying a frame each time is less than or equal to the exposure time period.
In some embodiments, the determining module 302 is specifically configured to control the Gclk frequency, the blanking time, and the timing between each refresh and refresh, so that the number of times of displaying a frame of picture in the exposure duration is an integer number of times.
It should be noted that, as will be clear to those skilled in the art, for convenience and brevity of description, the specific working processes of the above-described apparatus and each module and unit may refer to the corresponding processes in the foregoing embodiment of the LED display method, and are not described herein again.
Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
As shown in fig. 9, the electronic apparatus includes: a processor 41, a computer-readable storage medium 42, and a bus 43, wherein:
the electronic device may include one or more processors 41, a bus 43, and a storage medium 42, wherein the storage medium 42 is configured to store machine-readable instructions, the processors 41 are communicatively coupled to the storage medium 42 via the bus 43, and the processors 41 execute the machine-readable instructions stored by the storage medium 42 to perform the above-described method embodiments.
The electronic device may be a general-purpose computer, a server, a mobile terminal, or the like, and is not limited herein. The electronic device is used for realizing the above method embodiments of the present application.
It is noted that processor 41 may include one or more processing cores (e.g., a single-core processor or a multi-core processor). Merely by way of example, a Processor may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an Application Specific Instruction Set Processor (ASIP), a Graphics Processing Unit (GPU), a Physical Processing Unit (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Device (PLD), a controller, a microcontroller Unit, a Reduced Instruction Set computer (Reduced Instruction Set computer), a microprocessor, or the like, or any combination thereof.
The storage medium 42 may include: including mass storage, removable storage, volatile Read-and-write Memory, or Read-Only Memory (ROM), among others, or any combination thereof. By way of example, mass storage may include magnetic disks, optical disks, solid state drives, etc.; removable memory may include flash drives, floppy disks, optical disks, memory cards, zip disks, tapes, and the like; volatile read-write Memory may include Random Access Memory (RAM); the RAM may include Dynamic RAM (DRAM), Double data Rate Synchronous Dynamic RAM (DDR SDRAM); static RAM (SRAM), Thyristor-Based Random Access Memory (T-RAM), Zero-capacitor RAM (Zero-RAM), and the like. By way of example, ROMs may include Mask Read-Only memories (MROMs), Programmable ROMs (PROMs), Erasable Programmable ROMs (PERROMs), Electrically Erasable Programmable ROMs (EEPROMs), compact disk ROMs (CD-ROMs), digital versatile disks (ROMs), and the like.
For ease of illustration, only one processor 41 is depicted in the electronic device. It should be noted, however, that the electronic device in the present application may also comprise a plurality of processors 41, and thus the steps performed by one processor described in the present application may also be performed by a plurality of processors jointly or separately. For example, if the processor 41 of the electronic device executes step a and step B, it should be understood that step a and step B may also be executed by two different processors together or executed in one processor separately. For example, a first processor performs step a and a second processor performs step B, or the first processor and the second processor perform steps a and B together.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the foregoing method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The embodiment of the present application provides a chip system, where the chip system includes a memory and a processor, and the processor executes a computer program stored in the memory to implement the steps in the foregoing method embodiments.
An embodiment of the present application provides a chip system, where the chip system includes a processor, the processor is coupled to a computer-readable storage medium, and the processor executes a computer program stored in the computer-readable storage medium to implement the steps in the above-mentioned method embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or system in which the element is included.
The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the advantages and disadvantages of the embodiments. While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An LED display method is applied to an augmented reality system, and is characterized in that the augmented reality system comprises an LED display screen, a controller and a camera, the controller is respectively connected with the camera and the LED display screen, the controller receives a video source and plays the video source through the LED display screen, and the method comprises the following steps:
the controller acquires the frame frequency of a video source and the exposure duration of the video source during shooting;
determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the time length for displaying the frame of picture is less than or equal to the exposure time length;
and playing the video source on the LED display screen according to the duration of one frame of picture displayed on the LED display screen.
2. The method according to claim 1, wherein the frame period corresponding to the frame frequency comprises a first period and a second period, wherein the duration of the first period is the same as the exposure duration, and the sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency;
determining the time length for displaying a frame of picture on the LED display screen according to the frame frequency and the exposure time length comprises the following steps:
acquiring a corresponding first display parameter in a preset parameter set according to the frame frequency and the exposure duration;
displaying the one frame of picture on the LED display screen at least once in the first period according to the first display parameter;
acquiring a second display parameter according to the time length relation between the first time period and the second time period;
displaying the one frame of picture on the LED display screen at least once in the second time period according to the second display parameter;
when the black field time between two frames of pictures is greater than a first preset threshold value, the black field time is averagely distributed into blanking time, so that the black field time is less than a second preset threshold value.
3. The method of claim 1, further comprising:
and in a frame period corresponding to the frame frequency, the number of times of displaying one frame of picture on the LED display screen is even, and the time length of displaying one frame of picture each time is less than or equal to the exposure time length.
4. The method according to claim 3, wherein the number of times of displaying a frame of picture on the LED display screen is even, and the duration of displaying a frame of picture each time is less than or equal to the exposure duration, comprises:
the Gclk frequency, the blanking time and the time sequence between each refreshing are controlled, so that the number of times of displaying one frame of picture in the exposure time length is an integral number of times.
5. The utility model provides a LED display device, is applied to the augmented reality system, its characterized in that, the augmented reality system includes LED display screen, controller and camera, the controller respectively with camera and LED display screen are connected, the controller receives the video source and plays through the LED display screen, the device includes:
the acquisition module is used for acquiring the frame frequency of a video source and the exposure time when the video camera shoots;
the determining module is used for determining the time length for displaying one frame of picture on the LED display screen according to the frame frequency and the exposure time length, wherein the time length for displaying one frame of picture is less than or equal to the exposure time length;
and the playing module is used for playing the video source on the LED display screen according to the time length of one frame of picture displayed on the LED display screen.
6. The apparatus according to claim 5, wherein the frame period corresponding to the frame frequency comprises a first period and a second period, the duration of the first period is the same as the exposure duration, and the sum of the duration of the first period and the duration of the second period is equal to the frame period corresponding to the frame frequency;
the determining module is specifically configured to obtain a corresponding first display parameter in a preset parameter set according to the frame frequency and the exposure duration;
displaying the one frame of picture on the LED display screen at least once in the first period according to the first display parameter;
acquiring a second display parameter according to the time length relation between the first time period and the second time period;
displaying the one frame of picture on the LED display screen at least once in the second time period according to the second display parameter;
when the black field time between two frames of pictures is greater than a first preset threshold value, the black field time is averagely distributed into blanking time, so that the black field time is less than a second preset threshold value.
7. The apparatus according to claim 6, wherein the number of times of displaying a frame on the LED display screen in the frame period corresponding to the frame frequency is an even number, and the duration of displaying a frame each time is less than or equal to the exposure duration.
8. The apparatus of claim 7, wherein the determining module is specifically configured to control the Gclk frequency, the blanking time, and the timing between each refresh and refresh, so that the number of times a frame of a picture is displayed in the exposure time period is an integer number of times.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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