CN110728948A - LED display screen, baffle angle control method and device thereof and storage medium - Google Patents
LED display screen, baffle angle control method and device thereof and storage medium Download PDFInfo
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- CN110728948A CN110728948A CN201911067343.9A CN201911067343A CN110728948A CN 110728948 A CN110728948 A CN 110728948A CN 201911067343 A CN201911067343 A CN 201911067343A CN 110728948 A CN110728948 A CN 110728948A
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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]
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Abstract
The invention discloses an LED display screen, a baffle angle control method and device thereof and a storage medium, and belongs to the technical field of LED display screens. The method comprises the following steps: collecting a target image; recognizing a face area in a target image, and acquiring the height of eyes of an observer from the face area; calculating an optimal viewing angle according to the number of the observers and the heights of the eyes of the observers; and adjusting the angle of the baffle according to the optimal viewing angle. The invention adjusts the light-emitting angle of the display screen by identifying the height of eyes of an observer and adjusting the angle of the baffle according to the optimal viewing angle, vertically reflects light rays which are not vertical to a human face to the human face, ensures that the light-emitting angle of the lamp is vertical to the human face, and ensures that the observer has no color difference in vision and has the optimal viewing effect.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to an LED display screen, a method and a device for controlling the angle of a baffle plate of the LED display screen and a storage medium.
Background
LED immersive display screen is formed by a plurality of LED display module group concatenations, and the multimedia video of meticulously creating is combined to exquisite display screen, slowly expands to the rear from one side from shallow deepening, then alternates and removes through the whole scope of artistic gimmick, makes the people obtain complete sense of immersing, telepresence and sense of reality. However, due to the fact that the LED lamps are shielded by the baffles at different positions, people have poor experiences such as color difference and inconsistent brightness when watching the display screen.
Disclosure of Invention
The invention aims to provide an LED display screen, a baffle angle control method and device thereof and a storage medium, and solves the technical problem of inconsistent color difference and brightness caused by the fact that an LED lamp is shielded by a baffle.
The technical purpose of the invention is realized by the following technical scheme:
according to one aspect of the invention, a baffle angle control method of an LED display screen is provided, which comprises the following steps:
collecting a target image;
recognizing a face area in the target image, and acquiring the eye height of an observer from the face area;
calculating an optimal viewing angle according to the number of the observers and the heights of the eyes of the observers;
and adjusting the angle of the baffle according to the optimal viewing angle.
As a further optimization, the calculating the optimal viewing angle according to the number of observers and the height of the eyes of the observers comprises:
when the number of observers is less than or equal to two, calculating the optimal viewing angle in the horizontal direction of the baffle and the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm;
and when the number of the observers is more than two, calculating the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm.
As a further optimization, the calculating the optimal viewing angle in the horizontal direction of the baffle according to the preset algorithm includes:
calculating the optimal viewing angle of the baffle in the horizontal direction according to the position of the face area;
the calculating of the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm includes:
and calculating the optimal viewing angle in the vertical direction of the baffle according to the average value of the eye heights of the observers.
As a further optimization, before the obtaining the heights of the eyes of the observer from the face region, the method includes:
comparing the face areas of the front and rear target images, and taking the face in a watching state as an observer;
and when no face in the watching state exists, terminating the subsequent steps and re-collecting the target image.
As a further optimization, the adjusting the baffle angle according to the optimal viewing angle comprises:
and programming a single chip microcomputer chip on a display module of the LED display screen according to the optimal viewing angle, interrupting the processing program to output a PWN wave, and controlling the rotation angle of the motor through the PWM wave to realize the adjustment of the angle of the baffle.
According to another aspect of the present invention, there is provided a barrier angle control apparatus for an LED display screen, comprising:
the acquisition unit is used for acquiring a target image;
the identification unit is used for identifying a face area in the target image and acquiring the height of eyes of an observer from the face area;
a processing unit for calculating an optimal viewing angle based on the number of observers and the height of the eyes of the observers;
and the adjusting component is used for adjusting the angle of the baffle according to the optimal viewing angle.
As a further optimization, the adjusting component comprises a horizontal motor for adjusting the angle of the baffle in the horizontal direction, a vertical motor for adjusting the angle of the baffle in the vertical direction, and a single chip for controlling the horizontal motor and the vertical motor.
As a further optimization, the single chip is a single chip on a display module of the LED display screen.
According to another aspect of the present invention, there is provided an LED display screen, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method for controlling the angle of the baffle plate of the LED display screen.
According to still another aspect of the present invention, a storage medium is provided, the storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the method for controlling the angle of a bezel of an LED display screen as described above.
In conclusion, the invention has the following beneficial effects: the invention adjusts the light-emitting angle of the display screen by identifying the height of eyes of an observer and adjusting the angle of the baffle according to the optimal viewing angle, vertically reflects light rays which are not vertical to a human face to the human face, ensures that the light-emitting angle of the lamp is vertical to the human face, and ensures that the observer has no color difference in vision and has the optimal viewing effect.
Drawings
FIG. 1 is a schematic flowchart of a method for controlling a bezel angle of an LED display panel according to a first embodiment;
FIG. 2 is a schematic structural diagram of a baffle angle control device of an LED display screen according to a second embodiment;
fig. 3 is a partial structural schematic diagram of an LED display screen in the embodiment.
In the figure: 100. a collection unit; 200. an identification unit; 300. a processing unit; 400. an adjustment assembly; 1. a box body; 2. a display module; 21. LED lamp beads; 3. a baffle plate; 4. an electric motor.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
In this embodiment, as shown in fig. 1, a method for controlling a baffle angle of an LED display screen includes the following steps:
and S10, acquiring a target image.
Specifically, a camera or other acquisition units are mounted on the baffle or at a proper position of the LED display screen, and a target image is acquired through the camera or other acquisition units, wherein the target image can be an image obtained through direct shooting or an image obtained through processing after shooting.
And S20, recognizing the face area in the target image and acquiring the height of the eyes of the observer from the face area.
Specifically, after the target image is collected, the face area in the target image is identified through a related identification technology, and the eye height of each observer is obtained from the identified eye area. And as optimization, comparing the face areas of the front target image and the rear target image before acquiring the eye height of the observer from the face area, taking the face in the watching state as the observer, and stopping the subsequent steps and re-acquiring the target image when no face in the watching state exists. Whether the effective data of the height of the eyes of the observer are obtained by identifying and judging whether the eyes are in the watching state or not can be identified, so that the watching experience of the actual observer can be improved in a more targeted manner, and unnecessary adjustment is avoided when no one watches the eyes.
And S30, calculating the optimal viewing angle according to the number of the observers and the heights of the eyes of the observers.
Specifically, when the number of observers is less than or equal to two, calculating the optimal viewing angle in the horizontal direction of the baffle and the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm; when the number of observers is more than two, the optimal viewing angle in the vertical direction of the baffle is calculated according to a preset algorithm. When the number of observers is large, the horizontal direction of each baffle is adjusted, the watching effect is poor, and therefore the horizontal direction is not adjusted. The above calculating the optimal viewing angle in the horizontal direction of the barrier according to a preset algorithm includes: and calculating the optimal viewing angle of the baffle in the horizontal direction according to the position of the face area. The light-emitting angle of the display screen is adjusted by adjusting the angle of the baffle in the horizontal direction, and light which is not perpendicular to the face is vertically emitted to the face. The above calculation of the optimal viewing angle in the vertical direction of the barrier according to the preset calculation (including when the number of observers is less than or equal to two and when the number of observers is greater than two) includes: and calculating the optimal viewing angle in the vertical direction according to the average value of the eye heights of the observers. From the height of each observer's eye, an average is calculated. When the number of observers is large and the maximum value and/or the minimum value in the height values of the eyes of the observers are greatly different from other data, the average value is calculated after removing the maximum value and/or the minimum value.
And S40, adjusting the baffle angle according to the optimal viewing angle.
Specifically, the angle of the baffle is adjusted according to the calculated optimal viewing angle, so that the light emitting angle of the display screen is adjusted, light rays which are not perpendicular to the human face are vertically reflected to the human face, the light emitting angle of the lamp is perpendicular to the human face, and an observer visually has no color difference and the viewing effect is optimal. The adjusting the angle of the baffle according to the optimal viewing angle specifically comprises: and programming the single chip microcomputer chip according to the optimal viewing angle, and outputting a PWN wave which controls the rotation angle of the motor. Specifically, as shown in fig. 3, a single chip (not shown) on the display module 2 of the LED display screen can be used to perform programming through an I/O port, and an interrupt processing program outputs a PWM wave to realize square wave duty control, thereby controlling the rotation angle of the motor 4, wherein the larger the duty ratio is, the larger the adjustable angle is. The motor 4 is connected with the baffle 3, and the baffle 3 can realize angle adjustment through the rotation of the motor 4.
In the method for controlling the angle of the baffle of the LED display screen in this embodiment, the height of the eyes of the observer is identified, and the angle of the baffle is adjusted according to the optimal viewing angle, so as to adjust the light emitting angle of the display screen, and vertically reflect the light not perpendicular to the face, thereby ensuring that the light emitting angle of the lamp is perpendicular to the face, so that the observer visually has no color difference and the viewing effect is optimal.
Example two
As shown in fig. 2, the device for controlling the angle of the baffle of the LED display screen in this embodiment includes:
the acquisition unit 100 is used for acquiring a target image.
Specifically, the acquisition unit 100 may be a camera mounted on a baffle or other suitable position of the LED display screen, and the camera captures or records a target image.
The recognition unit 200 is configured to recognize a face region in the target image, and acquire the heights of the eyes of the observer from the face region.
Specifically, after the acquisition unit 100 acquires the target image, the recognition unit 200 recognizes a face region in the target image, and the face region obtains the height of the eyes of the observer. As optimization, before the height of the eyes of the observer is obtained from the face region, the face regions of the front and rear target images are compared, the face in the viewing state is used as the observer, when there is no face in the viewing state, the subsequent steps are terminated, and the target image is collected again by the collecting unit 100. Whether the effective data of the height of the eyes of the observer are obtained by identifying and judging whether the eyes are in the watching state or not can be identified, so that the watching experience of the actual observer can be improved in a more targeted manner, and unnecessary adjustment is avoided when no one watches the eyes.
A processing unit 300 for calculating an optimal viewing angle based on the number of observers and the height of the eyes of the observer.
Specifically, when the number of observers is less than or equal to two, the processing unit 300 calculates an optimal viewing angle in the horizontal direction of the barrier and an optimal viewing angle in the vertical direction of the barrier according to a preset algorithm; when the number of observers is greater than two, the processing unit 300 calculates an optimal viewing angle in the vertical direction of the barrier according to a preset algorithm. When the number of observers is large, the horizontal direction of each baffle is adjusted, the watching effect is poor, and therefore the horizontal direction is not adjusted. The above calculating the optimal viewing angle in the horizontal direction of the barrier according to a preset algorithm includes: the processing unit 300 calculates the optimal viewing angle in the horizontal direction of the baffle according to the position of the face area. The light-emitting angle of the display screen is adjusted by adjusting the angle of the baffle in the horizontal direction, and light which is not perpendicular to the face is vertically emitted to the face. The above calculation of the optimal viewing angle in the vertical direction of the barrier according to the preset calculation (including when the number of observers is less than or equal to two and when the number of observers is greater than two) includes: the processing unit 300 calculates the optimal viewing angle in the vertical direction from the average of the eye heights of the viewers. From the height of each observer's eye, an average is calculated. When the number of observers is large and the maximum value and/or the minimum value in the height values of the eyes of the observers are greatly different from other data, the average value is calculated after removing the maximum value and/or the minimum value.
And an adjusting assembly 400 for adjusting the angle of the baffle according to the optimal viewing angle.
Specifically, according to the optimal viewing angle calculated by the processing unit 300, the adjustment assembly 400 adjusts the angle of the baffle plate, so as to adjust the light emitting angle of the display screen, vertically reflect the light not perpendicular to the face, and ensure that the light emitting angle of the lamp is perpendicular to the face, so that the observer has no color difference in vision and the viewing effect is optimal.
The baffle angle control device of the LED display screen in the embodiment adjusts the angle of the baffle according to the optimal viewing angle by identifying the height of eyes of an observer, so that the light-emitting angle of the display screen is adjusted, light rays which are not perpendicular to a human face are vertically reflected to the human face, the light-emitting angle of the lamp is perpendicular to the human face, and the observer visually has no chromatic aberration and the viewing effect is optimal.
As an optimization, the adjusting assembly 400 includes a horizontal motor, a vertical motor and a single chip microcomputer chip on the display module of the LED display screen, the horizontal motor is used for adjusting the angle of the baffle in the horizontal direction, the vertical motor is used for adjusting the angle of the baffle in the vertical direction, and the single chip microcomputer chip is used for controlling the rotation angle of the vertical motor of the horizontal motor. Specifically, as shown in fig. 3, a single chip (not shown) on the display module 2 of the LED display screen can be used to perform programming through an I/O port, and an interrupt processing program outputs a PWM wave to realize square wave duty control, thereby controlling the rotation angle of the motor 4, wherein the larger the duty ratio is, the larger the adjustable angle is. The motor 4 is connected with the baffle 3, and the baffle 3 can realize angle adjustment through the rotation of the motor 4. The single chip microcomputer chip can also use a single chip microcomputer chip which is only used for controlling the horizontal motor and the vertical motor, and the adjusting component is installed in the box body 1 of the LED display screen and is connected with the baffle 3.
EXAMPLE III
In this embodiment, the LED display screen includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the steps of the method for controlling the angle of the baffle plate of the LED display screen are implemented.
The LED display screen of this embodiment and the method of the first embodiment belong to the same concept, and specific implementation processes thereof are detailed in the corresponding method embodiments, and technical features in the method embodiments are correspondingly applicable in this embodiment, which is not described herein again.
Example four
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for controlling the baffle angle of the LED display screen in the first embodiment are implemented.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The above specific embodiments are merely illustrative of the present invention, and are not restrictive, and those skilled in the art can modify the above embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims of the present invention.
Claims (10)
1. A baffle angle control method of an LED display screen is characterized by comprising the following steps: the method comprises the following steps:
collecting a target image;
recognizing a face area in the target image, and acquiring the eye height of an observer from the face area;
calculating an optimal viewing angle according to the number of the observers and the heights of the eyes of the observers;
and adjusting the angle of the baffle according to the optimal viewing angle.
2. The method for controlling the angle of the baffle plate of the LED display screen according to claim 1, wherein the method comprises the following steps: the calculating of the optimal viewing angle according to the number of observers and the height of the eyes of the observers comprises:
when the number of observers is less than or equal to two, calculating the optimal viewing angle in the horizontal direction of the baffle and the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm;
and when the number of the observers is more than two, calculating the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm.
3. The method for controlling the angle of the baffle plate of the LED display screen according to claim 2, wherein the method comprises the following steps: the calculating the optimal viewing angle in the horizontal direction of the baffle according to a preset algorithm comprises:
calculating the optimal viewing angle of the baffle in the horizontal direction according to the position of the face area;
the calculating of the optimal viewing angle in the vertical direction of the baffle according to a preset algorithm includes:
and calculating the optimal viewing angle in the vertical direction of the baffle according to the average value of the eye heights of the observers.
4. The method for controlling the angle of the baffle plate of the LED display screen according to claim 1, wherein the method comprises the following steps: before the obtaining of the heights of the eyes of the observer from the face region, the method comprises the following steps:
comparing the face areas of the front and rear target images, and taking the face in a watching state as an observer;
and when no face in the watching state exists, terminating the subsequent steps and re-collecting the target image.
5. The method for controlling the angle of the baffle plate of the LED display screen according to claim 1, wherein the method comprises the following steps: the adjusting the baffle angle according to the optimal viewing angle comprises:
and programming a single chip microcomputer chip on a display module of the LED display screen according to the optimal viewing angle, interrupting the processing program to output a PWN wave, and controlling the rotation angle of the motor through the PWM wave to realize the adjustment of the angle of the baffle.
6. The utility model provides a baffle angle control device of LED display screen which characterized in that: the method comprises the following steps:
the acquisition unit is used for acquiring a target image;
the identification unit is used for identifying a face area in the target image and acquiring the height of eyes of an observer from the face area;
a processing unit for calculating an optimal viewing angle based on the number of observers and the height of the eyes of the observers;
and the adjusting component is used for adjusting the angle of the baffle according to the optimal viewing angle.
7. The apparatus for controlling the angle of the baffle plate of the LED display screen according to claim 6, wherein: the adjusting component comprises a horizontal motor used for adjusting the angle of the baffle in the horizontal direction, a vertical motor used for adjusting the angle of the baffle in the vertical direction and a single chip microcomputer chip used for controlling the horizontal motor and the vertical motor.
8. The apparatus for controlling the angle of the baffle plate of the LED display screen according to claim 6, wherein: the single chip is a single chip on a display module of the LED display screen.
9. An LED display screen, its characterized in that: the LED display screen comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the baffle angle control method of the LED display screen according to any one of claims 1-5 are realized.
10. A storage medium, characterized by: the storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for controlling the bezel angle of an LED display screen as claimed in any one of claims 1 to 5.
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| CN201911067343.9A CN110728948B (en) | 2019-11-04 | 2019-11-04 | LED display screen, baffle angle control method and device thereof and storage medium |
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