CN212484712U - Device for demonstrating persistence of vision - Google Patents
Device for demonstrating persistence of vision Download PDFInfo
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- CN212484712U CN212484712U CN202021170869.8U CN202021170869U CN212484712U CN 212484712 U CN212484712 U CN 212484712U CN 202021170869 U CN202021170869 U CN 202021170869U CN 212484712 U CN212484712 U CN 212484712U
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Abstract
A device for demonstrating the phenomenon of persistence of vision belongs to the field of science and education instruments and is composed of a liquid crystal dimming film and a model turntable with adjustable rotating speed, wherein the liquid crystal dimming film comprises a shell surrounded by the liquid crystal film, a liquid crystal power supply driver and a frequency controller, the frequency controller controls the liquid crystal power supply driver to output driving current with set frequency and duty ratio, and the output driving current drives the liquid crystal film to enable the liquid crystal film to transmit light according to the set frequency and duty ratio; the model turntable is arranged in the shell and consists of an animation model disc and a rotating mechanism, the rotating mechanism is conventionally composed of a direct current speed reducing motor, a power supply and a rotating speed regulator, and the center of the animation model disc is connected with an output shaft of the direct current speed reducing motor; the animation model disc is divided into equal areas which are the same as the total frame number of the animation to be demonstrated, and the two-dimensional picture or the three-dimensional model animation content of each frame is adhered or directly solidified to the corresponding area of the disc.
Description
Technical Field
The utility model belongs to science and education instrument field relates to a device of demonstration persistence of vision phenomenon.
Background
The phenomenon of persistence of vision means that the picture effect generated inside the eyes of a person cannot disappear immediately when the eyes observe the outside world, but stays for a certain period of time (0.1 second to 0.4 second), and typical applications of the phenomenon are film movies, displays and the like. In the teaching process, in order to demonstrate the phenomenon of persistence of vision, animation characters with continuous actions are drawn by means of tools such as paper sheets and the like, and the animation characters are turned rapidly or a disc is rotated manually; the demonstration can also be realized by observing the continuously changing animation patterns of the rotation through a tiny slit by using the shielding principle.
The above-described conventional methods of mechanically switching frame by frame have the following problems: 1. the demonstration effect is related to the drawing technical level of a drawer, and the phenomenon demonstration is not smooth due to the fact that the page turning speed is not easy to control during demonstration; 2. the observation area of the slit method is limited, and the demonstration effect can be seen only in a small area and at a small angle; 3. the two-dimensional animation effect is not visual enough, and the appreciation is poor; 4. the process of occlusion is also seen, and the observation always has a disturbing feeling.
Disclosure of Invention
Aiming at the defects of the traditional demonstration method, the invention provides the animation continuous action demonstration device which realizes the animation continuous action based on the principle of persistence of vision by utilizing the liquid crystal dimming film with adjustable light transmission to be matched with the model turntable with adjustable rotating speed.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a device for demonstrating persistence of vision phenomenon, comprises liquid crystal membrane of adjusting luminance and the adjustable model carousel of rotational speed, its characterized in that: the liquid crystal dimming film comprises a shell surrounded by a liquid crystal film, a liquid crystal power supply driver and a frequency controller, wherein the frequency controller controls the liquid crystal power supply driver to output driving current with set frequency and duty ratio, and the output driving current drives the liquid crystal film to enable the liquid crystal film to transmit light according to the set frequency and duty ratio; the model turntable is arranged in the shell and consists of an animation model disc and a rotating mechanism, the rotating mechanism is conventionally composed of a direct current speed reducing motor, a power supply and a rotating speed regulator, and the center of the animation model disc is connected with an output shaft of the direct current speed reducing motor; the animation model disc is divided into equal areas which are the same as the total frame number of the animation to be demonstrated, and the two-dimensional picture or the three-dimensional model animation content of each frame is adhered or directly solidified to the corresponding area of the disc.
The frequency is greater than 24Hz and the duty cycle is from 1:10 to 1: 20.
The utility model provides a liquid crystal membrane of adjusting luminance is with certain frequency, certain duty cycle printing opacity, need not flash of light, need not the slit and shelters from, also can realize the switching of animation model frame by frame, has reduced the reliance to environmental condition, has also reduced the vision interference that mechanical switch produced. The model turntable rotates at a constant speed, so that the aim of smooth demonstration is fulfilled; the device can be watched at a viewing angle of 180 degrees, the purpose of large visual range of the persistence of vision demonstration device is realized, and the device has high ornamental value; even if the disc of the model is not rotated, the model can be used as artistic furnishings and has certain ornamental value.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of an apparatus for demonstrating persistence of vision of the present invention.
In the figure: 1. liquid crystal film casing, 2, animation model dish, 3, shaft coupling mechanism, 4, quick-witted case.
Detailed Description
The utility model is composed of a liquid crystal dimming film and a model turntable with adjustable rotating speed, wherein,
the liquid crystal dimming film comprises a liquid crystal film shell 1 formed by enclosing a liquid crystal film, a liquid crystal power supply driver and a frequency controller. The frequency controller controls the liquid crystal power supply driver to output driving current with set frequency and duty ratio, and the output driving current drives the liquid crystal film to enable the liquid crystal film to transmit light according to the set frequency and duty ratio.
The model turntable with adjustable rotating speed consists of an animation model disk 2 and a rotating mechanism, wherein the rotating mechanism is conventionally composed of a direct current speed reducing motor, a power supply and a rotating speed regulator, and the center of the animation model disk is connected with an output shaft of the direct current speed reducing motor through a shaft coupling mechanism 3; the animation model disc 2 is to divide the disc into equal divided areas with the same total number of the animation to be demonstrated, and stick or directly solidify the two-dimensional picture or three-dimensional model animation content of each frame to the corresponding area of the disc.
The model turntable with adjustable rotating speed is placed in the liquid crystal film shell 1. The DC speed reducing motor, the power supply, the speed regulator of the model turntable with adjustable rotating speed, the liquid crystal power supply driver of the liquid crystal dimming film and the frequency controller are all arranged in the case 4. When the animation model disc 2 rotates, when the light transmission frequency of the liquid crystal film shell 1 is matched with the time for the animation model disc 2 to rotate a frame area, the stable animation effect formed by the two-dimensional picture or the three-dimensional model animation content in the animation model disc 2 is observed. In order to make the image clearer, the frequency of light transmission of the liquid crystal film shell 1 can be more than 24Hz, and the duty ratio of the light transmission is at least 1: 10.
Claims (2)
1. The utility model provides a device for demonstrating persistence of vision phenomenon, comprises liquid crystal membrane of adjusting luminance and the adjustable model carousel of rotational speed, its characterized in that: the liquid crystal dimming film comprises a shell surrounded by a liquid crystal film, a liquid crystal power supply driver and a frequency controller, wherein the frequency controller controls the liquid crystal power supply driver to output driving current with set frequency and duty ratio, and the output driving current drives the liquid crystal film to enable the liquid crystal film to transmit light according to the set frequency and duty ratio; the model turntable is arranged in the shell and consists of an animation model disc and a rotating mechanism, the rotating mechanism is formed by electrically connecting a direct current speed reducing motor, a power supply and a rotating speed regulator, and the center of the animation model disc is connected with an output shaft of the direct current speed reducing motor; the animation model disc is divided into equal areas which are the same as the total frame number of the animation to be demonstrated, and the two-dimensional picture or the three-dimensional model animation content of each frame is adhered or directly solidified to the corresponding area of the disc.
2. An apparatus for demonstrating the phenomenon of persistence of vision as claimed in claim 1, wherein: the frequency is greater than 24Hz and the duty cycle is from 1:10 to 1: 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170869.8U CN212484712U (en) | 2020-06-22 | 2020-06-22 | Device for demonstrating persistence of vision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170869.8U CN212484712U (en) | 2020-06-22 | 2020-06-22 | Device for demonstrating persistence of vision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212484712U true CN212484712U (en) | 2021-02-05 |
Family
ID=74412444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021170869.8U Active CN212484712U (en) | 2020-06-22 | 2020-06-22 | Device for demonstrating persistence of vision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212484712U (en) |
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2020
- 2020-06-22 CN CN202021170869.8U patent/CN212484712U/en active Active
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