Patent Publication Number: US-10762832-B2

Title: Visual persistence display device and a video display device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 201711092692.7, filed on Nov. 8, 2017, entitled “a visual persistence display device and a video display device”, which is hereby incorporated by reference into this application as if fully set forth herein. 
     FIELD OF THE INVENTION 
     The present application relates to technical field of electronics, and especially to a visual persistence display device and a video display device. 
     BACKGROUND OF THE INVENTION 
     With the development of multimedia communication technology, display screens for advertising can be seen everywhere in the city, for example, LED (Light Emitting Diode) display, liquid crystal display and visual persistence display (POV-LED, Visual persistence Light Emitting) Diode) and so on. 
     Although the existing visual persistence display can realize the display of the pattern or the text content by setting the LED lamp at the corresponding position of the LED lamp strip, but only after the position of the LED lamp is determined, only the image or text content corresponding to the lamp position of the LED light can be displayed. Therefore, in the prior art, the visual persistence display screen has a problem that the display content is too singular. 
     SUMMARY OF THE INVENTION 
     The present application provides a visual persistence display device and a video display device according to an embodiment, which can make the content that can be displayed on the visual persistence display screen more abundant. 
     In a first aspect, an embodiment of the present application provides a visual persistence display device, where the visual persistence display device includes: 
     An electric motor; 
     an RGB display unit, which is connected to the electric motor and configured for rotating at a preset speed under the driving of the electric motor to form an image display surface; 
     an RGB driving member, which is connected to the RGB display unit and configured for generating a timing sequence control signal when the pixel data stream is received, and send the pixel data stream and the timing sequence control signal to the RGB display unit for display; and 
     a control unit, which is connected to the electric motor and to the RGB driving member respectively and configured for controlling the operation of the electric motor, acquiring a video code stream, and decoding the video code stream to obtain the pixel data stream. 
     In a second aspect, an embodiment of the present application further provides a rechargeable battery including a battery core, which further includes the visual persistence display device in the first aspect. 
     The embodiment of the present application provides a visual persistence display device and a video display device, the control unit controls the operation of the electric motor, and the RGB display unit rotates at a preset rotation speed to form an image display surface, and the control unit obtains the pixel data stream and send to the RGB driving member by acquiring a video code stream and decoding the video code stream; when the pixel data stream is received by using RGB driving member, the timing sequence control signal is generated, and the when the pixel data stream is received by the RGB driving member, the timing sequence control signal is generated, and the pixel data stream and the timing sequence control signal are sent to the RGB display unit for display so that the visual persistence display can display more abundant. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings to be used in the embodiments and the description of the prior art will be briefly introduced below, it is apparent that the drawings in the following description are merely some embodiments of the present application and that other drawings may be obtained by those skilled in the field without departing from the inventive nature of the application. 
         FIG. 1  is a schematic structural view of a visual persistence display device according to an embodiment of the present application; 
         FIG. 2  is a schematic view of a specific structure of an RGB display unit in a visual persistence display device according to an embodiment of the present application; 
         FIGS. 3A to 3D  are schematic views showing a specific structure of an RGB lamp strip assembly in a visual persistence display device according to embodiments of the present application; 
         FIG. 4  is a schematic structural view of a video display device according to an embodiment of the present application. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application. 
     Please refer to  FIG. 1 ,  FIG. 1  is a schematic structural view of a visual persistence display device according to an embodiment of the present application. As shown in  FIG. 1 , a visual persistence display device  100  includes an electric motor  10 , an RGB display unit  20 , an RGB driving member  30 , and a control unit  40 , specifically: 
     The electric motor  10 , which is configured to drive the RGB display unit  20  to rotate. 
     The RGB display unit  20  is connected to the electric motor  10  and configured for rotating at a preset rotational speed under the driving of the electric motor  10  to form an image display surface. 
     The RGB driving member  30 , which is connected to the RGB display unit  20  and configured for generating a timing sequence control signal upon receiving the pixel data stream, and transmitting the pixel data stream and the timing sequence control signal to the RGB display unit  20  for display. 
     The control unit  40 , which is connected to the electric motor  10  and to the RGB driving member  30  respectively and configured for controlling the operation of the electric motor  10 , acquiring a video code stream, and decoding the video code stream to obtain a pixel data stream. 
     In this embodiment, the control unit  40  is configured to control the rotation speed of the electric motor  10 , and the RGB display unit  20  rotates at a preset rotation speed under the driving of the electric motor  10  to form an image display surface, wherein the value of the rotation speed of the electric motor  10  is corresponded to the refresh rate of the image display surface, that is, the value of the rotation speed of the electric motor  10  equal to the refresh rate of the image display surface. 
     For example, the refresh rate of the image display surface is 24 frames per second, and the rotational speed of the electric motor  10  is 24 revolutions per second (r/S). 
     It should be noted that when the RGB driving member  30  receives the pixel data stream, a timing sequence control signal corresponding to the pixel data stream is generated, and the RGB display unit  20  displays the color corresponding to the pixel data stream according to the timing sequence control signal. 
     In any of the embodiments of the present application, the control unit  40  controls the rotational speed of electric motor  10  by controlling the input current of electric motor  10 . The control unit  40  obtains the video code stream by reading the video code stream in the storage unit or receiving the video code stream sent by other terminals, and decoding the video code stream to obtain a pixel data stream. 
     The RGB display unit  20  can be arranged by using RGB lamps or RGB lamps composed a matrix to rotate at a preset speed under the driving of the electric motor  10 , and drive the RGB lamps or RGB lamps composed a matrix to move rapidly in the rotating surface to form an image display surface. 
     It should be noted that when the human eye views the object and images the object on the retina, the photoreceptor cells of the retina convert the light signal into a bioelectrical signal, which is transmitted to the brain through the visual nerve, and when the object is removed, The impression of the object to the visual nerve does not disappear immediately, which in turn creates a phenomenon of visual persistence. Therefore, when the RGB display unit  20  is driven by the electric motor  10 , it rotates at a preset rotational speed, and drives the RGB lamps or RGB lamps composed a matrix to move rapidly in the rotating surface, so that the image in the rotating surface can be formed a persistence of image on the retina of the human, that is, an image display surface capable of displaying an image is formed. 
     In the above solution, the control unit controls the operation of the electric motor, and the RGB display unit rotates at a preset rotation speed to form an image display surface, and the control unit obtains the pixel data stream and send to the RGB driving member by acquiring a video code stream and decoding the video code stream; when the pixel data stream is received by using the RGB driving member, the timing sequence control signal is generated, and the when the pixel data stream is received by the RGB driving member, the timing sequence control signal is generated, and the pixel data stream and the timing sequence control signal are sent to the RGB display unit for display so that the visual persistence display can display more abundant. 
     Please refer to  FIG. 2 ,  FIG. 2  is a schematic view of a specific structure of an RGB display unit in a visual persistence display device according to an embodiment of the present application. As shown in  FIG. 2 , based on the foregoing embodiment, as a possible implementation manner of the embodiment, the RGB display unit  20  includes: 
     A electric motor coupler  21 , which is configured for coupling with a driving shaft of the electric motor  10 . 
     An RGB lamp strip assembly  22  fixedly, which is connected to the electric motor coupler  21  and configured for arranging RGB lamps. 
     When the control unit  40  controls the operation of the electric motor  10 , the electric motor  10  drives the RGB lamp strip assembly  22  to rotate at a preset rotational speed through the driving shaft of the electric motor, so that the RGB lamps moves uniformly at the rotating surface of the RGB lamp strip assembly to form an image display surface. 
     In this embodiment, the RGB driving member  30  is specifically configured to receive the pixel data stream sent by the control unit  40 , generate a timing sequence control signal according to the pixel data stream, and send the pixel data stream together with the timing sequence control signal to the RGB lamp for display. 
     It should be noted that, in order to make the pattern in the image display surface continuous and undistorted when the RGB display unit  20  is rotated, all the RGB lamps on the RGB lamp strip correspond to the same timing sequence control signal, and the pixel data streams respectively act on each of the RGB lamps to control the display color of each RGB lamp so that the image displayed on the image display surface observed by the human eye is continuous and undistorted. 
     It can be understood that the electric motor coupler  21  is fixed with the driving shaft of the electric motor  10  by providing a thread or a clipping mechanism at inner side thereof, and the electric motor coupler  21  is fixed with the RGB lamp strip assembly  22  by providing a thread at outer side thereof. In all the embodiments of the present application, the electric motor coupler  21  can use the existing connection structure for coupling with the electric motor driving shaft, which is not shown in the drawings, and will not be described herein. 
       FIGS. 3A to 3E  are schematic views showing a specific structure of an RGB lamp strip assembly in a visual persistence display device according to an embodiment of the present application. As shown in  FIG. 3A , as a possible implementation manner of this embodiment, the RGB lamp strip assembly  22  includes a first RGB lamp strip  221 . 
     As shown in  FIG. 3A , the first RGB lamp strip  221  is a rectangular strip, and the first RGB lamp strip  221  is provided with a first connection portion  2211  for fixedly connecting with the electric motor coupler  21 , and the first connection portion is located at an end of the rectangular strip shape in its length direction. 
     As shown in  FIG. 3B , as a possible implementation manner of this embodiment, the RGB lamp strip assembly includes: a second RGB lamp strip  222 . 
     The second RGB lamp strip  222  is a rectangular strip, and the second RGB lamp strip  222  is provided with a second connection portion  2221  for fixedly connecting with the electric motor coupler, and the second connection portion  2221  is located at an axially central position of the rectangular strip. In the present embodiment, the central axis of the rectangular strip and the central axis of the driving shaft of the electric motor coincide with each other. 
     As shown in  FIG. 3B , as a possible implementation manner of the embodiment, the second RGB lamp strip  222  is provided with a plurality of RGB lamps uniformly spaced along the length thereof. 
     Specifically, the center position of the rectangular strip is a symmetrical point, and a first lamp strip body  2222  and the second lamp strip body  2223  are respectively extended toward along both ends in the longitudinal direction of the rectangular strip. 
     A plurality of RGB lamps are respectively disposed on the first lamp strip body  2222  and the second lamp strip body  2223 , wherein the center line in the longitudinal direction of the rectangular strip body is a symmetrical axis, and a plurality of the RGB lamps on the first lamp strip body  2222  are symmetrical with a plurality of RGB lamps on the second lamp strip body  2223 . 
     As shown in  FIG. 3C , as another possible implementation manner of the embodiment, the second RGB lamp strip  222  has a plurality of dummy areas a distributed evenly along the length thereof, and a plurality of RGB lamps b and a plurality of dummy areas a are alternately distributed. 
     Specifically, the center position of the rectangular strip is a symmetrical point, and a first lamp strip body  2222  and the second lamp strip body  2223  are respectively extended toward along both ends in the longitudinal direction of the rectangular strip. 
     A plurality of RGB lamps are respectively disposed on the first lamp strip body  2222  and the second lamp strip body  2223 , wherein the plurality of RGB lamps on the first lamp strip body  2222  and the plurality of the RGB lamps on the second lamp strip body  2223  are alternately distributed. 
     For example, a plurality of lamp positions are symmetrically disposed on the first lamp strip body  2222  and the second lamp strip body  2223  respectively, and the lamp position is used to set RGB lamps, wherein the lamp position on the first lamp strip body  2222  has an odd number is empty, and the RGB lamp is provided at the lamp position on the first lamp strip body  2222  with an even number, and the RGB lamp is disposed at the lamp position on the second lamp strip body  2223  with an odd number, the lamp position on the second lamp strip body  22232  has an even number is empty. 
     It should be noted that, in order to reduce the density of the lamp strip body due to the excessive setting of the RGB lamp, and causing the temperature of the lamp strip body is too high, therefore, in the case that the picture presented by the rotation of the lamp strip body is undistorted, the plurality of RGB lamps disposed on the first lamp strip body  2222  and the RGB lamps disposed on the second lamp strip body  2223  are alternately distributed to ensure the resolution of the image display surface and improve the reliability of the RGB lamp strip. 
     In the present embodiment, in order to increase the refresh rate of the RGB display unit  20 , it can be realized by increasing the rotational speed of the electric motor  10 , and also by arranging more RGB lamp strips. 
     As shown in  FIG. 3D , as another possible implementation manner of the embodiment, the RGB lamp strip assembly  22  further includes: a third RGB lamp strip  223  having the same structure as the second RGB lamp strip  222 . 
     A third connection portion  2231  of the third RGB lamp strip  223  at its axially central position for fixedly connecting with the electric motor coupler  21 . 
     As shown in  FIG. 3D , the angle between the second RGB lamp strip  222  and the third RGB lamp strip  223  in the direction of rotation is less than or equal to 90 degrees. 
     The electric motor  10  only drives the second RGB lamp strip  222  to rotate, and the second RGB lamp strip  222  and the third RGB lamp strip  223  are rotated together with the electric motor  10  as an example. If the image display surface can display an image normally when the electric motor  10  only drives the second RGB lamp strip  222  at a rotation speed of 24 rpm, when the electric motor  10  simultaneously drives the second RGB lamp strip  222  and the third RGB lamp strip to rotate, it only needs to work at the rotation speed of 12 rpm, and the effect of rotating the second RGB lamp strip  222  at a rotation speed of 24 rpm can be realized. 
     In the present embodiment, since the third RGB lamp strip  223  is added to the second RGB lamp strip  222 , the effect of increasing the refresh rate can be achieved without increasing the rotational speed of the electric motor  10 . 
     The operation principle of the visual persistence display device  100  in the present embodiment will be described in detail below with reference to  FIGS. 1 to 3D . 
     As shown in  FIG. 1  and  FIG. 2 , the control unit  40  controls the operation of the electric motor  10 , the electric motor  10  drives the RGB lamp strip assembly  22  to rotate at a preset rotational speed by the electric motor coupler  21 , so that the RGB lamps is moved at a constant speed in the rotation surface of the RGB lamp strip assembly to form an image display surface. At the same time, the control unit  40  obtains the video code stream and decodes the video code stream to obtain a pixel data stream and sends it to the RGB driving member  30 , when the RGB driving member  30  receives the pixel data stream, and generates a timing sequence control signal, and the pixel data stream and the timing sequence control signal are sent to the RGB display unit  20  for display. 
     When the RGB lamp strip assembly  22  rotates at a preset rotation speed, the RGB lamps on the first RGB lamp strip  221 , the second RGB lamp strip  222 , and/or the third RGB lamp strip  223  are displayed corresponding colors according to the pixel data stream and the timing sequence control signal, therefore playing the video corresponding to the video code stream in the image display surface is realized 
     In the above solution, the control unit controls the operation of the electric motor, and the RGB display unit rotates at a preset rotation speed to form an image display surface, and the control unit obtains the pixel data stream and send to the RGB driving member by acquiring a video code stream and decoding the video code stream; when the pixel data stream is received by using the RGB driving member, the timing sequence control signal is generated, and the when the pixel data stream is received by the RGB driving member, the timing sequence control signal is generated, and the pixel data stream and the timing sequence control signal are sent to the RGB display unit for display so that the visual persistence display can display more abundant. 
     The plurality of RGB lamps disposed on the first lamp strip body  2222  and the RGB lamps disposed on the second lamp strip body  2223  are alternately distributed, thereby ensuring the resolution of the image display surface and improving the reliability of the RGB lamp strip. The third RGB lamp strip  223  is added to the second RGB lamp strip  222 , the effect of increasing the refresh rate can be achieved without increasing the rotational speed of the electric motor  10 . 
       FIG. 4  is a schematic structural view of a video display device according to an embodiment of the present application. As shown in  FIG. 4 , the video display device  200  includes a host computer  110 , and further includes a visual persistence display device  100  in the above embodiment. 
     It is to be understood that the content and the implementation manner related to the video display device  200  of the present embodiment are described in detail in the foregoing, and therefore are not described herein again. 
     In the above solution, the control unit controls the operation of the electric motor, and the RGB display unit rotates at a preset rotation speed to form an image display surface, and the control unit obtains the pixel data stream and send to the RGB driving member by acquiring a video code stream and decoding the video code stream; when the pixel data stream is received by using the RGB driving member, the timing sequence control signal is generated, and the when the pixel data stream is received by the RGB driving member, the timing sequence control signal is generated, and the pixel data stream and the timing sequence control signal are sent to the RGB display unit for display so that the visual persistence display can display more abundant. 
     The units of the terminal in the embodiment of the present application may be combined, divided, and deleted according to actual needs. It&#39;s obvious that the aforementioned embodiments are only preferred embodiments of the present application, and are not intended to limit the present application. Any modification, equivalent replacement, improvement, and so on, which are made within the spirit and the principle of the present application, should be comprised in the scope of the present application.