CN108615492B - Rotary display device and display driving method thereof - Google Patents
Rotary display device and display driving method thereof Download PDFInfo
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- CN108615492B CN108615492B CN201810644572.1A CN201810644572A CN108615492B CN 108615492 B CN108615492 B CN 108615492B CN 201810644572 A CN201810644572 A CN 201810644572A CN 108615492 B CN108615492 B CN 108615492B
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/005—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes forming an image using a quickly moving array of imaging elements, causing the human eye to perceive an image which has a larger resolution than the array, e.g. an image on a cylinder formed by a rotating line of LEDs parallel to the axis of rotation
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Abstract
本发明公开了一种旋转显示装置及其显示驱动方法，涉及旋转显示装置技术领域，用于解决现有的旋转显示装置在显示时整个显示面亮度不均衡的问题而发明。该旋转显示装置，包括机架，机架上可转动设有旋转件，旋转件上设有多个位于不同位置的灯珠，当旋转件相对机架转动时，多个灯珠可形成多个半径不同、且沿垂直于旋转件的旋转中心轴的方向分布的运动轨迹；还包括驱动模块，驱动模块用于在接收到图像显示信号后，控制向图像显示信号所指示需要点亮的灯珠输入第一电信号，以点亮该需要点亮的灯珠，第一电信号的强度值为设定值除以与需要点亮的灯珠所对应的平衡系数。本发明可用于图像或视频的显示。
The invention discloses a rotary display device and a display driving method thereof, relates to the technical field of rotary display devices, and is invented to solve the problem that the brightness of the entire display surface of the existing rotary display device is unbalanced during display. The rotating display device includes a frame, a rotating member is rotatably provided on the frame, and a plurality of lamp beads located at different positions are arranged on the rotating member. When the rotating member rotates relative to the frame, the plurality of lamp beads can form a plurality of lamp beads. Motion trajectories with different radii and distributed along the direction perpendicular to the rotation center axis of the rotating member; also include a driving module, which is used to control the lamp beads that need to be lit as indicated by the image display signal after receiving the image display signal A first electrical signal is input to light the lamp bead that needs to be lit, and the intensity value of the first electrical signal is divided by the set value by the balance coefficient corresponding to the lamp bead to be lit. The present invention can be used for the display of images or videos.
Description
Technical Field
The invention relates to the technical field of rotary display devices, in particular to a rotary display device and a display driving method thereof.
Background
The rotary display device is a novel display scheme which utilizes mechanical rotation dynamic scanning to replace the traditional progressive scanning mode, and has the characteristics of low cost and large visual range. The rotary display device also has the advantages of low power consumption, long service life, strong brightness and the like, and is widely applied to the aspects of information disclosure and the like of public places such as advertisements, stations, banks, markets and the like.
A conventional rotary display device, as shown in fig. 1, includes a frame 01, a driving motor 02 is fixedly disposed on the frame 01, a circuit board 03 is fixedly connected to a rotating shaft of the driving motor 02, a plurality of LED (Light Emitting Diode) lamp beads 04 are disposed on the circuit board 03, the plurality of LED lamp beads 04 are linearly distributed on the circuit board 03 along an extending direction of the circuit board 03, and when the driving motor 02 drives the circuit board 03 to rotate, a moving track of the plurality of LED lamp beads 04 may form a display surface. When the LED lamp beads 04 are driven by the circuit board 03 to be lightened, due to the persistence of vision effect, the lightened LED lamp beads 04 can form a plurality of lightened concentric movement tracks.
Because the distance from each LED lamp bead 04 to the rotation center of the circuit board 03 is different, when the circuit board 03 drives the LED lamp beads 04 to be turned on, the swept area of each LED lamp bead 04 is also different, the swept area of the LED lamp bead 04 farther away from the rotation center is larger, and if the brightness of each LED lamp bead 04 when turned on is the same, the brightness of the motion track formed by the LED lamp bead 04 farther away from the rotation center is lower than that of the LED lamp bead 04 closer to the rotation center, so that the brightness of the whole display surface is unbalanced during display, and the display effect of the rotary display device is greatly influenced.
Disclosure of Invention
The embodiment of the invention provides a rotary display device and a display driving method thereof, which are used for solving the problem of uneven brightness of the whole display surface when the conventional rotary display device displays.
In order to achieve the above object, an embodiment of the present invention provides a rotary display device, including a frame, wherein a rotary member is rotatably disposed on the frame, and a plurality of lamp beads located at different positions are disposed on the rotary member; the lighting device further comprises a driving module, wherein the driving module is used for controlling to input a first electric signal to the lamp bead needing to be lighted and indicated by the image display signal after receiving the image display signal so as to light the lamp bead needing to be lighted, and the intensity value of the first electric signal is a set value divided by a balance coefficient corresponding to the lamp bead needing to be lighted; the balance coefficient p corresponding to the lamp beads needing to be lightened meets the following requirements: p ═ LL'/S; in the formula, L is the sum of brightness values of all lamp beads in a first motion track when a second electrical signal is input, the second electrical signal is the same as the first electrical signal in signal type, the intensity value of the second electrical signal is the preset value, and the first motion track is the motion track where the lamp bead needing to be lightened is located; l' is a target brightness value; s is the projection area of the first motion track in a first plane, and the first plane is a vertical plane perpendicular to the rotation central axis; or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the innermost side, S is a projection area of a region between an outer side edge line of the first motion track and an outer side edge line of the second motion track in the first plane; for the innermost motion trail, S is the projection area of a region surrounded by the outer side line of the first motion trail in the first plane; or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the outermost side, S is a projection area of a region between an inner side edge line of the first motion track and an inner side edge line of the second motion track in the first plane; for the motion track at the outermost side, the S value is the projection area of an area between an inner side line of the first motion track and a circular line in the first plane, and the circular line is concentric with the first motion track, positioned at the outer side of the first motion track and has a set value of distance from the rotation center of the rotating member; the second motion track is a motion track which is located on the inner side of the first motion track and is adjacent to the first motion track.
In the rotary display device provided by the embodiment of the invention, the driving module is used for controlling the first electric signal to be input to the lamp bead needing to be lightened and indicated by the image display signal after receiving the image display signal so as to lighten the lamp bead needing to be lightened, so that the driving module can control the intensity of the first electric signal input to the lamp bead needing to be lightened according to the difference of the motion track of the lamp bead needing to be lightened after receiving the image display signal so as to control the brightness value of the lamp bead needing to be lightened after being lightened, so that the brightness of the motion track of each lamp bead is the same when each lamp bead is lightened, the brightness of the whole display surface is balanced when the rotary display device is used for displaying, and the display effect of the rotary display device can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional rotary display device;
FIG. 2 is a schematic diagram of arrangement of lamp beads on a rotating member in the rotary display device according to the embodiment of the present invention;
FIG. 3 is a first schematic diagram of a motion track formed by a lamp bead when a rotating member rotates in the embodiment of the invention;
FIG. 4 is a second schematic view of a movement track formed by the lamp bead when the rotating member rotates in the embodiment of the present invention;
FIG. 5 is a schematic diagram of a connection between a driving module and a lamp bead in the rotary display device according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a relationship between coordinates of a point on a display surface of a rotary display device and coordinates of a rectangular screen according to an embodiment of the present invention;
fig. 7 is a flowchart of a display driving method of a rotating display device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In a first aspect, an embodiment of the present invention provides a rotary display device, as shown in fig. 2, including a frame (not shown in the figure), wherein a rotary member 1 is rotatably disposed on the frame, a plurality of lamp beads 2 located at different positions are disposed on the rotary member 1, and when the rotary member 1 rotates relative to the frame, as shown in fig. 3, the plurality of lamp beads 2 may form a plurality of motion tracks 3 having different radii and distributed along a direction perpendicular to a central rotation axis of the rotary member 1; as shown in fig. 5, the rotary display device further includes a driving module 4, where the driving module 4 is configured to control, after receiving the image display signal, to input a first electrical signal to the lamp bead 2 that needs to be lit and is indicated by the image display signal, so as to light the lamp bead 2 that needs to be lit, and an intensity value of the first electrical signal is a set value divided by a balance coefficient corresponding to the lamp bead 2 that needs to be lit; the balance coefficient p corresponding to the lamp bead 2 needing to be lightened meets the following requirements: p is L L'/S;
in the formula, L is the sum of brightness values of all the lamp beads 2 in the first motion track when the second electrical signal is input, the second electrical signal is the same as the first electrical signal in signal type, the intensity value of the second electrical signal is a preset value, and the first motion track is a motion track 3 where the lamp bead 2 needing to be lightened is located; for example, when the first electrical signal is a current signal, then the second electrical signal is also a current signal; the set value can be a rated value, for example, when the first electrical signal is a current signal, the preset value can be a rated current value of the lamp bead;
l' is a target brightness value;
s is the projection area of the first motion track in a first plane; wherein, the first plane is a vertical plane perpendicular to the rotation central axis; for example, as shown in fig. 3, if the lamp bead 2a needs to be lit, the S value is the area of the circular ring formed by the trace line 31a and the trace line 32 a; if the lamp bead 2b needs to be lighted, the value of S is the area of the circular ring formed by the trajectory line 31b and the trajectory line 32 b; if the lamp bead 2c needs to be lighted, the value of S is the area of the circular ring formed by the surface trace line 31c and the trace line 32 c.
In the rotary display device provided by the embodiment of the invention, after receiving the image display signal, the driving module 4 is used for controlling the first electric signal to be input to the lamp bead 2 which needs to be lightened and is indicated by the image display signal so as to lighten the lamp bead 2 which needs to be lightened, so that after receiving the image display signal, the driving module 4 can control the intensity of the first electric signal input to the lamp bead 2 which needs to be lightened according to the difference of the motion track 3 of the lamp bead 2 which needs to be lightened, so as to control the brightness value of the lamp bead 2 which needs to be lightened after being lightened, so that when each lamp bead 2 is lightened, the brightness of the motion track 3 of each lamp bead 2 is the same, the brightness of the whole display surface is balanced when the rotary display device is used for displaying, and the display effect of the rotary display device can be improved.
In the above embodiment, the magnitude of the S value may also be calculated by: in a direction perpendicular to the rotation central axis of the rotating member 1, S is a projected area of a region between an outer side edge line of a first motion trajectory and an outer side edge line of a second motion trajectory in the first plane with respect to the motion trajectories 3 other than the innermost side, where the second motion trajectory is the motion trajectory 3 located inside the first motion trajectory and adjacent to the first motion trajectory. For example, as shown in fig. 3, if the bead 2a needs to be lit, the S value is the area of the circular ring formed by the trace line 31a and the trace line 31 b; if the lamp bead 2b needs to be lighted, the value S is the area of a circular ring formed by the track line 31b and the track line 31 c; for the innermost motion trail 3, S is the projection area of the area surrounded by the outer side line of the first motion trail in the first plane; for example, as shown in fig. 3, the movement track 3 where the lamp bead 2c is located at the innermost side, and if the lamp bead 2c needs to be lit, the S value is the area of the circle surrounded by the track line 31 c;
the magnitude of the S value may also be calculated by: in the direction perpendicular to the rotation central axis of the rotating member 1, S is the projection area of the region between the inner side edge line of the first motion trajectory and the inner side edge line of the second motion trajectory in the first plane for the motion trajectories 3 except the outermost side; for example, as shown in fig. 3, if the bead 2c needs to be lit, the S value is the area of the circular ring formed by the trace line 32c and the trace line 32 b; if the lamp bead 2b needs to be lighted, the value S is the area of a circular ring formed by the track line 32b and the track line 32a, and so on; for the outermost motion track 3 along the direction perpendicular to the rotation central axis of the rotating member 1, the value of S is the projection area of the area between the inner side line of the first motion track and the circular line 5 in the first plane, and the circular line 5 is a circular line which is concentric with the first motion track, is positioned at the outer side of the first motion track and has a set value of distance from the rotation center of the rotating member 1; for example, as shown in fig. 4, the moving track 3 on which the lamp bead 2e is located at the outermost side, if the lamp bead 2e needs to be lit, the S value is the area of a circular ring formed by the track line 32e and the circular line 5, and the interval between the circular line 5 and the track line 32e may be the same as the interval between the track line 32e and the track line 32 d.
In the rotary display device provided by the embodiment of the present invention, "outer" specifically means in a direction perpendicular to the rotation center axis of the rotary member 1 and away from the rotation center axis of the rotary member 1; "inner" specifically means a direction perpendicular to the rotation center axis of the rotary member 1 and close to the rotation center axis of the rotary member 1.
In the rotary display device provided by the embodiment of the present invention, the structural composition of the driving module 4 is not unique, for example, the driving module 4 may be as follows: as shown in fig. 5, the driving module 4 includes a first adjusting unit 41 and a second adjusting unit 42 connected; the first adjusting unit 41 comprises a first output end 411 and a second output end 412, the second adjusting unit 42 comprises a third input end 421 and a third output end 422, the second output end 412 is electrically connected with the third input end 421, and each second output end 412 and each third output end 422 are electrically connected with one lamp bead 2 respectively; the first adjusting unit 41 is configured to output a first electrical signal through the first output terminal 411; a third electrical signal is output through the second output end 412, the intensity values of the first electrical signal and the third electrical signal are obtained by dividing a preset value by a plurality of first balance coefficients, the signal type of the third electrical signal is the same as that of the first electrical signal, for example, when the first electrical signal is a current signal, the third electrical signal is also a current signal; the second adjusting unit 42 is configured to divide the intensity value of the third electrical signal input by the third input end 421 by the corresponding second balance coefficient to obtain a first electrical signal, and the first electrical signal is output through the third output end 422.
Each second output end 412 and each third output end 422 can also be electrically connected with a plurality of lamp beads 2 respectively, and for the second output end 412 and the third output end 422, the distance between a plurality of lamp beads 2 electrically connected with the same output end and the rotation central axis is the same, that is, the plurality of lamp beads 2 electrically connected with the same output end are located in the same motion track 3. Because the lamp beads 2 in the same movement track 3 need to input the first electric signals with the same intensity when needing to be lightened, all the lamp beads 2 in the same movement track 3 are connected with the same output end, so that the occupation of the output end can be greatly saved.
In addition, the driving module 4 may only include the first adjusting unit 41, the first output terminal 411 and the second output terminal 412 of the first adjusting unit 41 are respectively electrically connected to at least one lamp bead 2, and for the second output terminal 412 and the third output terminal 422, the distances from the central axis of rotation of the plurality of lamp beads 2 electrically connected to the same output terminal are the same. Compared with the embodiment that the driving module 4 only includes the first adjusting unit 41, in the embodiment that the driving module 4 includes the first adjusting unit 41 and the second adjusting unit 42, the electric signal input by the driving module 4 to the lamp bead 2 to be lit can be adjusted twice by the first adjusting unit 41 and the second adjusting unit 42, and the intensity value of the first electric signal input to the lamp bead 2 to be lit is obtained by dividing the preset value by the first balance coefficient and the second balance coefficient, so that it can be avoided that the balance coefficient divided by the preset value is too large when the driving module is adjusted only once by the first adjusting unit 41, for example, as shown in fig. 3, the innermost motion trajectory 3 has the smallest S value, and in the case that the intensity values of the input electric signals are the same, the innermost motion trajectory 3 has the highest brightness, if the number of the lamp beads 2 in each motion trajectory 3 is the same, and the brightness value of the outermost motion trajectory 3 is the target brightness value of the whole display surface, then the lamp bead 2 in the innermost motion track 3 needs to adjust its brightness by a larger balance coefficient; the lamp beads 2 in the innermost movement track 3 can be adjusted through the first adjusting unit 41 and the second adjusting unit 42, and the situation that the balance coefficient of the lamp beads 2 in the innermost movement track 3 which need to be adjusted is too large and the hardware requirement on the adjusting units is too high can be avoided.
In the rotary display device provided by the embodiment of the present invention, the balance coefficient (i.e. the product of the first balance coefficient and the second balance coefficient) may be greater than 1, for example, if the number of the lamp beads 2 in each motion track 3 is the same, and the brightness value of the outermost motion track 3 is the target brightness value of the whole display surface, the lamp beads 2 in the other motion tracks 3 need to be subjected to brightness attenuation adjustment, that is, the balance coefficient is greater than 1; the balance coefficient may also be smaller than 1, for example, if the number of the lamp beads 2 in each motion track 3 is the same, and the brightness value of the innermost motion track 3 is taken as the target brightness value of the whole display surface, the brightness increase adjustment is required to be performed on the lamp beads 2 in the other motion tracks 3, that is, the balance coefficient is smaller than 1. Whether the balance coefficient is greater than 1 or less than 1 may be set as the case may be.
In the embodiment where the balance coefficient is greater than 1, the magnitude setting of the first balance coefficient is not exclusive, for example, the first balance coefficient may be greater than 2; in addition, the first balance coefficient may be larger than 1 and smaller than 2. Compared with the first balance coefficient which is larger than 2, when the first balance coefficient is larger than 1 and smaller than 2, the first adjusting unit 41 can be controlled to adjust the brightness of the lamp bead 2, so that the whole driving module 4 is controlled to adjust the brightness of the lamp bead 2; for example, as shown in table 1, when the balance coefficient that the lamp bead 2 located in the innermost motion track 3 needs to be adjusted is 25.465, the corresponding first balance coefficient may be controlled to be 1.59, and then the corresponding second balance coefficient is 16 (that is, the balance coefficient is divided by the first balance coefficient), so that the first adjusting unit 41 performs fine adjustment on the brightness of the lamp bead 2 through the first balance coefficient, and the second adjusting unit 42 performs coarse adjustment on the brightness of the lamp bead 2 through the second balance coefficient, so that the first balance coefficient is controlled to be greater than 1 and smaller than 2, so that the driving module 4 forms a mode of combining fine adjustment and coarse adjustment, and thus the adjustment accuracy of the driving module 4 on the brightness of the lamp bead 2 may be improved.
In the driving module 4, as shown in fig. 5, the first adjusting unit 41 may be a PWM (Pulse Width Modulation) controller, the PWM controller may adjust the magnitude of the intensity value of the first electrical signal output by the first output terminal 411 and the magnitude of the intensity value of the third electrical signal output by the second output terminal 412 by changing the Width or duty ratio of the Pulse, and the PWM controller may control the magnitude of the intensity values of the first electrical signal and the third electrical signal in a digital manner, so as to greatly reduce the cost and power consumption of the system; as shown in fig. 5, the second adjusting unit 42 may include a divider connected between the third input terminal 421 and the third output terminal 422, and the divider may control a ratio of the electrical signal output by the third output terminal 422 to the intensity of the electrical signal input by the third input terminal 421 to adjust the intensity value of the first electrical signal output by the third output terminal 422.
In the rotary display device provided by the embodiment of the present invention, the arrangement manner of the plurality of lamp beads 2 on the rotary member 1 is not unique, and for example, the lamp beads may be arranged in the following manner: as shown in fig. 2, along a direction perpendicular to the rotation central axis (e.g., an X direction in fig. 2), a plurality of rows of beads 2 are disposed on the rotating member 1, each row is at least provided with one bead 2, distances from the rotation central axis of all beads 2 in the same row are the same, and between two adjacent rows of beads 2, the number of beads 2 located in the outer row is not less than the number of beads 2 located in the inner row. In addition, it may be arranged in the following manner: along the direction of perpendicular to rotation center axle, be equipped with multirow lamp pearl 2 on the rotating member 1, every row sets up a lamp pearl 2 at least, and all lamp pearls 2 in the same row are all the same from the distance of rotation center axle, and the lamp pearl 2's that every row set up quantity is all the same. Compare the equal embodiment of the figure of every row of lamp pearl 2 that sets up, the figure that is located outer lamp pearl 2 is not less than the embodiment that is located the figure of inner row of lamp pearl 2, between two adjacent rows of lamp pearls 2, the figure that is located outer lamp pearl 2 is not less than the figure that is located inner row of lamp pearl 2, the lamp pearl 2 that will arrange the figure more outward like this can increase the luminance that is located outside movement track 3, it leads to the equilibrium coefficient of drive module 4 regulation too big to avoid being located the luminance of outside movement track 3 and the luminance that is located inboard movement track 3 to differ greatly, thereby be favorable to rotating member 1 to show the equilibrium of face luminance when rotatory.
In the embodiment where the number of the beads 2 located in the outer row is not less than the number of the beads 2 located in the inner row, along the direction perpendicular to the rotation center axis, the distances between two adjacent rows of beads 2 may be equal (for example, as shown in fig. 2), or may not be equal, and compared with the case where the distances between two adjacent rows of beads 2 are not equal, when the distances between two adjacent rows of beads 2 are equal, the distribution of the movement tracks 3 of the beads 2 may be more balanced, thereby facilitating the balance of the brightness of the display surface when the rotating member 1 rotates.
In the rotary display device provided by the embodiment of the invention, the structural type of the rotary member 1 is not unique, for example, as shown in fig. 2, the rotary member 1 can be a horizontal-axis wind wheel, and the plurality of lamp beads 2 are all arranged on the wind wheel. In addition, rotating member 1 also can be the fixed plate, and the fixed plate is connected with the motor shaft, and a plurality of lamp pearls 2 all set up on the fixed plate. Compared with a fixed plate, when the rotating piece 1 is a horizontal-axis wind wheel, the rotating piece 1 can be driven to rotate by wind power when the wind is large enough, and the rotating piece 1 does not need to be driven to rotate by a motor, so that certain electric energy can be saved.
When the rotating member 1 is a horizontal-axis wind wheel, the number of the blades of the wind wheel may be 2 (for example, as shown in fig. 2), or may also be 3, 4, or the like, and is not particularly limited herein.
As shown in fig. 2, fig. 2 shows that 100 rows of lamp beads 2 are arranged on each fan blade (which may also be called as a propeller), distances between two adjacent rows of lamp beads 2 are equal and are 0.5cm, and the lamp beads 2 on each fan blade are symmetric about the center of rotation of the wind wheel. The specific setting mode of lamp bead 2 on every fan blade is as follows: along the direction of perpendicular to rotation center axle and directional outside, 1 st to 13 th row sets up 1 lamp pearl 2, 14 th to 25 th row sets up 2 lamp pearl 2, 26 th to 38 th row sets up 3 lamp pearl 2, 39 th to 51 th row sets up 4 lamp pearl 2, 52 th to 64 th row sets up 5 lamp pearl 2, 65 th to 76 th row sets up 6 lamp pearl 2, 77 th to 89 th row sets up 7 lamp pearl 2, 90 th to 100 th row sets up 8 lamp pearl 2. When the wind wheel rotates, if the brightness of one square centimeter illuminated by one lamp bead 2 is 1, the brightness of the ring where the 64 th row of lamp beads 2 is located is taken as the target brightness L', the brightness of each row of lamp beads 2 reached during rotation, and the balance coefficient of each row of lamp beads 2 are shown in table 1:
TABLE 1 calculation table of distribution and balance coefficient of lamp beads 2
It should be noted that: the magnitude of the S value in table 1 is calculated by: for the motion tracks 3 except the innermost side, S is the projection area of the area between the outer side edge line of the first motion track and the outer side edge line of the second motion track in the first plane; the radius in table 1 refers to the distance from the central axis of rotation of the outer edge of each row of beads 2 in the direction perpendicular to the central axis of rotation, for example, as shown in fig. 3, the radius in table 1 is 0.5cm, and refers to the radius of the track line 31c outside the movement track 3 of the bead 2 c; the radius of 1.0cm in table 1 means the radius of the trajectory line 31b outside the movement trajectory 3 of the bead 2b, and the radius of 1.5cm in table 1 means the radius of the trajectory line 31a outside the movement trajectory 3 of the bead 2 a.
In the rotary display device provided by the embodiment of the invention, the lamp beads 2 can be the LED lamp beads 2, the first electric signal, the second electric signal and the third electric signal are all current signals, and the driving module 4 adjusts the brightness of the LED lamp beads 2 by controlling the current of each LED lamp bead 2.
In a second aspect, an embodiment of the present invention further provides a display driving method of a rotary display device, as shown in fig. 2, the rotary display device includes a rack, a rotary member 1 is rotatably disposed on the rack, a plurality of lamp beads 2 located at different positions are disposed on the rotary member 1, and when the rotary member 1 rotates relative to the rack, the plurality of lamp beads 2 may form a plurality of motion tracks 3 having different radii and distributed along a direction perpendicular to a rotation central axis of the rotary member 1; the method comprises the following steps: as shown in figure 7 of the drawings,
s20, after receiving the image display signal, controlling to input a first electric signal to the lamp bead 2 needing to be lightened, which is indicated by the image display signal, so as to lighten the lamp bead 2, wherein the intensity value of the first electric signal is a set value divided by a balance coefficient corresponding to the lamp bead 2 needing to be lightened; the balance coefficient p corresponding to the lamp bead 2 needing to be lightened meets the following requirements: p is L L'/S;
the main body for executing the above steps may be the driving module 4.
Technical problems to be solved and advantageous effects of the display driving method of the rotary display device provided by the embodiment of the present invention are the same as those of the rotary display device provided in the first aspect, and are not described herein again.
In the above method embodiment, for one lamp bead 2, if the balance coefficient that this lamp bead 2 needs to adjust is relatively large, for example, this lamp bead 2 is the lamp bead 2 that is located in row 1 in table 1 shows, if directly output first electric signal, then output drive module 4 needs to divide the preset value by the balance coefficient to obtain first electric signal, so the hardware requirement to drive module 4 is higher, be unfavorable for reduce cost, in order to solve this problem, control to the lamp bead 2 that needs to be lighted that the image display signal indicates to input the electric signal in order to light this lamp bead 2 includes: outputting a third electric signal, wherein the intensity value of the third electric signal is obtained by dividing a preset value by the first balance coefficient; dividing the intensity value of the third electrical signal by the second balance coefficient to obtain a first electrical signal; a first electric signal is input to the lamp bead 2 to be lit to light the lamp bead 2. Through twice adjustment of the first balance coefficient and the second balance coefficient, the problem of high cost caused by high requirement on the driving module 4 by once adjustment can be solved when the balance coefficient is large.
In the display driving method of the rotary display device provided by the embodiment of the present invention, the balance coefficient may be greater than 1, for example, if the number of the lamp beads 2 in each motion track 3 is the same, and the brightness value of the outermost motion track 3 is the target brightness value of the whole display surface, the lamp beads 2 in the other motion tracks 3 need to be subjected to brightness attenuation adjustment, that is, the balance coefficient is greater than 1; the balance coefficient may also be smaller than 1, for example, if the number of the lamp beads 2 in each motion track 3 is the same, and the brightness value of the innermost motion track 3 is taken as the target brightness value of the whole display surface, the brightness increase adjustment is required to be performed on the lamp beads 2 in the other motion tracks 3, that is, the balance coefficient is smaller than 1. Whether the balance coefficient is greater than 1 or less than 1 may be set as the case may be.
In the embodiment of the method where the balance coefficient is greater than 1, the size of the first balance coefficient is not set, for example, the first balance coefficient may be greater than 2; in addition, the first balance coefficient may be larger than 1 and smaller than 2. Compared with the first balance coefficient which is more than 2, when the first balance coefficient is more than 1 and less than 2, the adjustment precision of the brightness of the lamp bead 2 can be controlled; for example, when the balance coefficient that the lamp bead 2 located in the innermost motion track 3 needs to be adjusted is 25.465, the first balance coefficient corresponding to the lamp bead 2 can be controlled to be 1.59, and then the second balance coefficient corresponding to the lamp bead 2 is 16, so that the brightness of the lamp bead 2 is finely adjusted through the first balance coefficient, the brightness of the lamp bead 2 is coarsely adjusted through the second balance coefficient, and thus, the first balance coefficient is controlled to be larger than 1 and smaller than 2, a mode combining fine adjustment and coarse adjustment can be formed, and the adjustment precision of the brightness of the lamp bead 2 can be improved.
In the display driving method of a rotary display device according to an embodiment of the present invention, before receiving an image display signal, the method further includes: as shown in figure 7 of the drawings,
and S10, acquiring the image to be displayed, and performing polar coordinate conversion on each pixel point on the image to generate an image display signal.
In the above step, the step of performing polar coordinate transformation on each pixel point on the image specifically includes the following steps:
s101, obtaining coordinates of each pixel point on the image on a rectangular screen;
for example, as shown in fig. 6, a rectangular screen is virtualized and a rectangular coordinate system is established, the rectangular screen is specifically composed of 0.5 × 0.5cm dot matrix units, the rectangular screen is provided with 200 × 200 dot matrix units, and the lower left corner of the rectangular screen is set as the origin of coordinates, that is, a point O1The coordinate of the position of the upper right corner is (200 ); and after the direct coordinate system is established, the coordinates of each pixel point on the image on the rectangular screen are obtained.
S102, obtaining the polar coordinates of each pixel point on the image on the display surface of the rotary display device according to the coordinate conversion relation between the point on the rectangular screen and the corresponding point on the display surface of the rotary display device;
for example, as shown in fig. 6, on the display surface of the rotating display device, that is, on the display surface (circular area in the figure) formed by the rotation of the rotating member 1, assuming that the included angle between the fan blade and the horizontal line is α, the polar coordinate of the point P with radius r on the display surface is (r, α); and the relation between the coordinates (X, Y) of the point P on the rectangular screen and the polar coordinates on the display surface is as follows:
X＝100+r·cosα；
Y＝100+r·sinα；
from the above relation, the polar coordinates of the point P on the display surface can be obtained, where r ═ X-1002+(Y-100)2)]0.5，α＝arcsin[(Y-100)/r]Or α ═ arcos [ (X-100)/r]. For a lamp bead 2 on the fan blade, r is a fixed value, and alpha can be obtained by calculation at any time according to the rotating speed and the feedback signal of the position sensor, so that the coordinate (X, Y) of each pixel point on the rectangular screen can correspond to an instantaneous (r, alpha) value on the display surface, and the image virtually displayed on the virtual rectangular screen can be converted into an image signal capable of being displayed by the display surface of the rotary display device through coordinate conversion.
By performing polar coordinate conversion on each pixel point on the image to be displayed, the driving program of the graphical interface in the rotary display device can directly operate the virtual rectangular screen, and the driving program of the graphical interface can complete the operation by using all the existing graphical interface functions.
The same or similar features in the embodiments of the display driving method of the rotating display device as those in the product embodiment of the rotating display device may be referred to the description of the product embodiment of the rotating display device, and are not repeated herein.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. A rotary display device is characterized by comprising a rack, wherein a rotary part is rotatably arranged on the rack, a plurality of lamp beads positioned at different positions are arranged on the rotary part, and when the rotary part rotates relative to the rack, the plurality of lamp beads can form a plurality of motion tracks which have different radiuses and are distributed along a direction vertical to a rotating central shaft of the rotary part;
the lighting device further comprises a driving module, wherein the driving module is used for controlling to input a first electric signal to the lamp bead needing to be lighted and indicated by the image display signal after receiving the image display signal so as to light the lamp bead needing to be lighted, and the intensity value of the first electric signal is a set value divided by a balance coefficient corresponding to the lamp bead needing to be lighted; the balance coefficient p corresponding to the lamp beads needing to be lightened meets the following requirements: p is L L'/S;
in the formula, L is the sum of brightness values of all lamp beads in a first motion track when a second electrical signal is input, the second electrical signal is the same as the first electrical signal in signal type, the intensity value of the second electrical signal is a preset value, and the first motion track is the motion track where the lamp bead needing to be lightened is located;
l' is a target brightness value;
s is the projection area of the first motion track in a first plane, and the first plane is a vertical plane perpendicular to the rotation central axis;
or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the innermost side, S is a projection area of a region between an outer side edge line of the first motion track and an outer side edge line of the second motion track in the first plane; for the innermost motion trail, S is the projection area of a region surrounded by the outer side line of the first motion trail in the first plane;
or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the outermost side, S is a projection area of a region between an inner side edge line of the first motion track and an inner side edge line of the second motion track in the first plane; for the motion track at the outermost side, the S value is the projection area of an area between an inner side line of the first motion track and a circular line in the first plane, and the circular line is concentric with the first motion track, positioned at the outer side of the first motion track and has a set value of distance from the rotation center of the rotating member;
the second motion track is a motion track which is located on the inner side of the first motion track and is adjacent to the first motion track.
2. The rotary display device according to claim 1, wherein the driving module comprises a first adjusting unit and a second adjusting unit connected; the first adjusting unit comprises a first output end and a second output end, the second adjusting unit comprises a third input end and a third output end, the second output end is electrically connected with the third input end, and each second output end and each third output end are respectively electrically connected with at least one lamp bead; and for the second output end and the third output end, the distance between at least one lamp bead electrically connected with the same output end and the rotating central shaft is the same;
the first adjusting unit is used for outputting the first electric signal through the first output end; outputting a third electrical signal through the second output end, wherein the intensity values of the first electrical signal and the third electrical signal are obtained by dividing the preset value by a plurality of first balance coefficients respectively, and the signal type of the third electrical signal is the same as that of the first electrical signal;
the second adjusting unit is configured to divide the intensity value of the third electrical signal input by the third input end by a corresponding second balance coefficient to obtain the first electrical signal, and the first electrical signal is output through the third output end.
3. The rotary display device according to claim 2, wherein the balance factor is greater than 1.
4. The rotary display device according to claim 3, wherein the first balance factor is greater than 1 and less than 2.
5. The rotary display device according to any one of claims 2 to 4, wherein the first adjusting unit is a PWM controller; the second adjusting unit comprises a divider connected between the third input and the third output.
6. The rotary display device according to any one of claims 1 to 4, wherein a plurality of rows of the lamp beads are arranged on the rotary member in a direction perpendicular to the central axis of rotation, at least one lamp bead is arranged in each row, all the lamp beads in the same row have the same distance from the central axis of rotation, and the number of the lamp beads in the outer row is not less than the number of the lamp beads in the inner row between two adjacent rows of the lamp beads.
7. The rotary display device as claimed in claim 6, wherein the distance between two adjacent rows of the beads is equal along the direction perpendicular to the central axis of rotation.
8. The rotary display device according to any one of claims 1 to 4, wherein the rotary member is a horizontal axis wind wheel, and the plurality of lamp beads are all arranged on the wind wheel.
9. A display driving method of a rotary display device comprises a rack, wherein a rotary part is rotatably arranged on the rack, a plurality of lamp beads positioned at different positions are arranged on the rotary part, and when the rotary part rotates relative to the rack, the plurality of lamp beads can form a plurality of motion tracks which have different radiuses and are distributed along a direction vertical to a rotating central shaft of the rotary part; the method is characterized by comprising the following steps:
after receiving an image display signal, controlling to input a first electric signal to a lamp bead needing to be lightened, which is indicated by the image display signal, so as to lighten the lamp bead, wherein the intensity value of the first electric signal is a set value divided by a balance coefficient corresponding to the lamp bead needing to be lightened; the balance coefficient p corresponding to the lamp beads needing to be lightened meets the following requirements: p is L L'/S;
in the formula, L is the sum of brightness values of all lamp beads in a first motion track when a second electrical signal is input, the second electrical signal is the same as the first electrical signal in signal type, the intensity value of the second electrical signal is a preset value, and the first motion track is the motion track where the lamp bead needing to be lightened is located;
l' is a target brightness value;
s is the projection area of the first motion track in a first plane, and the first plane is a vertical plane perpendicular to the rotation central axis;
or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the innermost side, S is a projection area of a region between an outer side edge line of the first motion track and an outer side edge line of the second motion track in the first plane; for the innermost motion trail, S is the projection area of a region surrounded by the outer side line of the first motion trail in the first plane;
or along a direction perpendicular to the rotation central axis of the rotating member, for the motion tracks except for the outermost side, S is a projection area of a region between an inner side edge line of the first motion track and an inner side edge line of the second motion track in the first plane; for the motion track at the outermost side, the S value is the projection area of an area between an inner side line of the first motion track and a circular line in the first plane, and the circular line is concentric with the first motion track, positioned at the outer side of the first motion track and has a set value of distance from the rotation center of the rotating member;
the second motion track is a motion track which is located on the inner side of the first motion track and is adjacent to the first motion track.
10. The display driving method of a rotary display device according to claim 9, wherein controlling, for one of the lamp beads, input of an electric signal to a lamp bead that needs to be lit and is indicated by the image display signal to light the lamp bead comprises:
outputting a third electric signal, wherein the intensity value of the third electric signal is obtained by dividing the preset value by a first balance coefficient;
dividing the intensity value of the third electrical signal by a second balance coefficient to obtain the first electrical signal,
and inputting the first electric signal to the lamp bead needing to be lightened so as to lighten the lamp bead needing to be lightened.
11. The display driving method of a rotary display device according to claim 10, wherein the balance coefficient is larger than 1.
12. The display driving method of a rotary display device according to claim 11, wherein the first balance coefficient is greater than 1 and less than 2.
13. The display driving method of a rotary display device according to any one of claims 10 to 12, further comprising, before receiving the image display signal, the steps of:
and acquiring an image to be displayed, and performing polar coordinate conversion on each pixel point on the image to generate the image display signal.
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| CN111383564B (en) * | 2018-12-29 | 2021-10-22 | Tcl科技集团股份有限公司 | Data processing method, rotary display device and storage medium |
| WO2021134567A1 (en) * | 2019-12-31 | 2021-07-08 | 李庆远 | Helikite display |
| CN114170954B (en) * | 2021-11-30 | 2023-03-07 | 中科芯集成电路有限公司 | Dynamic point correction algorithm for LED rotary screen |
| WO2023216225A1 (en) * | 2022-05-13 | 2023-11-16 | 施霖 | Light-emitting mode, arrangement mode and support device for light source group for volumetric 3d display in rotational scanning mode |
| CN117877440A (en) * | 2024-02-29 | 2024-04-12 | 惠科股份有限公司 | Display device and driving method thereof |
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