CN103177670A - Display device capable of achieving picture switchover - Google Patents

Abstract

The invention relates to a display device capable of achieving picture switchover. The display device capable of achieving the picture switchover is characterized by comprising a frame-shaped support, a transmission unit, a drive unit and a plurality of circulation belt type display units. Each circulation belt type display unit comprises a front rolling shaft, a rear rolling shaft, a rolling belt, a flexible material layer, a transmission wheel and a plurality of fixing bearings. Pictures on the flexible material layer are controlled, and therefore cartoon display, static picture display and cartoon and static picture cross display can be achieved. The display device capable of achieving the picture switchover can be applied to open-air large-size screen advertisements, store signboards, cartoon music boxes and the like. The display device capable of achieving the picture switchover has the advantages of being simple in structure, low in construction cost, capable of not only being used for commercial advertisements, but also being used for entertainment and decoration, rich in animation, attractive, relatively large in quantity of information and good in advertising effect.

Description

A display device capable of switching pictures

technical field

The invention relates to the field of display, in particular to a display device capable of switching pictures.

Background technique

At present, there are many types of outdoor large-scale open-air billboards, which can well realize good static advertisement display, and there are also billboard devices that can well realize multi-advertisement switching, but these billboard devices can only realize static display of one picture. It is powerless to display dynamic advertisements; a display device that can realize picture switching, compared with ordinary billboards on the market, can realize a greater number of static advertisement switching, especially can realize animation effects and enhance the performance of advertisements; Listed below are outdoor billboards and their drawbacks.

Such as single-column billboards; billboards are placed on special supporting columns, most of which are column-type T-shaped or P-shaped. Its disadvantage is that the screen is single, and only one advertisement can be fixedly displayed.

For example, advertising cloth roll-up billboards; advertising cloth roll-up billboards are composed of motors, reels, canvas rolls, and guide shafts. The reels are connected to the output of the motors. The reel is driven by the motor to make the canvas roll switch advertisements. It is often used in streets, bus stops, sports fields, etc. It can store multiple advertisements and realize the switching of multiple advertisements. The disadvantage is that it cannot display dynamic animation.

Such as a three-sided billboard; a three-sided billboard is composed of a group of side-by-side triangular prisms. The triangular prisms are made of special aluminum profiles. All the triangular prisms are driven by motors to rotate around their respective central axes, and the three sides of the triangular prisms are used to form three frame. The three-sided flip can realize switching between three advertisements, and the switching form is also dynamic, but the three-sided flip cannot realize dynamic display of an animation.

In terms of advertisement display, a display device capable of switching pictures can realize a larger number of static advertisement switching than previous billboards, especially can realize animation effects and enhance the expressiveness of advertisements. At the same time, in terms of toy screen display, static pictures are generally used for performance, and few mechanical products can achieve animation effects. The present invention adopts mechanical aspects to invent a display device that can realize picture switching, and can be controlled with clockwork or hand control at the same time. , making the toy more ornamental and entertaining.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a display device capable of switching pictures. The device can realize animation display, static picture display, and cross-display of animation and static pictures by controlling the pictures on the flexible material. It is used in outdoor large-screen advertisements, shop signs, animated music boxes, etc. The invention is simple in structure and low in cost, can be used for commercial advertisements, entertainment and decoration, is full of dynamics, attracts eyeballs, has a large amount of information, and has good advertising effects.

The present invention is realized by the following scheme: a display device capable of switching pictures, characterized in that it comprises:

A frame-shaped bracket;

A transmission unit; fixed on the frame support;

A drive unit; fixed on the frame-shaped support and mated with the transmission unit; and

A plurality of circular belt display units; the circular belt display unit includes:

a front roll axle;

a rear rolling axis, opposite and parallel to the front rolling axis;

a rolling belt wound between the front rolling shaft and the rear rolling shaft;

a layer of flexible material printed with pictures and adhered to said rolling belt;

a transmission wheel, arranged on the front rolling shaft and connected with the transmission unit; and

A plurality of fixed bearings are arranged on the front rolling shaft and the rear rolling shaft and are fixedly connected with the frame-shaped support;

Wherein, the plurality of circulating belt-type display units are spaced and juxtaposed on the frame-shaped support, and the sides of the plurality of circulating belt-type display units form a display panel.

In one embodiment of the present invention, the transmission unit includes: an intermittent motion mechanism, used to cooperate with the driving unit; a primary driven wheel, arranged on a driven rod and connected with the intermittent motion mechanism ; A plurality of secondary driven wheels are arranged on the driven rod and respectively matched with the transmission wheels in the endless belt display unit.

In an embodiment of the present invention, the intermittent motion mechanism is an incomplete gear, a sheave mechanism, a cam mechanism, a planar linkage mechanism, a ratchet movement or a two-way pawl mechanism.

In one embodiment of the present invention, the sheave mechanism includes a sheave and a round pin. The round pin is inserted into the groove of the sheave to drive the sheave to rotate. The display panel switches pictures. When the round pin leaves the groove , the sheave stops rotating, and the picture of the display panel remains; the number of round pins of the sheave mechanism is 1, the number of grooves is 3-12, and the switching time of the display panel accounts for 1/1 of the total time of each animation picture 3~1/12.

In an embodiment of the present invention, the driving unit is clockwork driven, manual manual or circuit driven.

In an embodiment of the present invention, the circuit drive includes a drive circuit and a motor; the drive circuit is a programmable circuit, which is used to control the rotation of the motor to control the scrolling of the front scroll shaft and the rear scroll shaft, Realize the switching display of pictures.

In an embodiment of the present invention, the circular belt display units are in the shape of strips or blocks, and the plurality of circular belt display units are arranged horizontally, vertically, obliquely, in the shape of a "field" or "Product" font arrangement.

In an embodiment of the present invention, the endless belt display unit further includes a plurality of scroll wheels, which are arranged on the front scroll shaft and the rear scroll shaft, and are used to cooperate with the scroll belt; the scroll wheels The rolling belt is a gear and gear transmission belt, a pulley and a belt or a gear and a hole type transmission belt.

In an embodiment of the present invention, the front rolling shaft is composed of two small cylindrical rolling shafts, and the two small cylindrical rolling shafts are separated by a certain distance, and the flexible material layer is pulled apart by a certain width to form a narrow strip , the width of the narrow strips is equal to the effective width of the rear scrolling axis, and the narrow strips in the plurality of circular band display units form the display panel.

In an embodiment of the present invention, the display panel can realize switching display of static pictures, animation display, or cross display of animation and static pictures; wherein,

If the display panels formed by the plurality of flexible material layers printed with pictures at different times are independent pictures, switching display of static pictures can be realized;

If the display panels formed by the plurality of flexible material layers printed with pictures at different times are associated animation pictures, the fast intermittent scrolling of the front scroll axis is controlled to realize animation display;

If the display panels formed by the plurality of flexible material layers printed with pictures at different times are partly irrelevant and partly associated animated pictures, the scrolling of the front scroll axis is controlled to realize the cross-display of display panel animation and static pictures.

By controlling the pictures on the flexible material layer, the present invention can realize animation display, static picture display, and cross-display of animation and static pictures, and can be applied to open-air large-screen advertisements, shop signboards, animated music boxes, and the like. The invention is simple in structure and low in cost, can be used for commercial advertisements, entertainment and decoration, is full of dynamics, attracts eyeballs, has a large amount of information, and has good advertising effects. In addition, the present invention, as a display device capable of switching pictures, can be applied to the field of toys, cooperate with the music box to realize the combination of the music and the picture of the music box, realize vivid and colorful, and can also be applied to the field of advertisement display to realize the display of animation advertisements.

Description of drawings

FIG. 1 is a schematic structural view of a display device capable of switching pictures according to the present invention including a driving circuit.

Fig. 2 is a schematic diagram of the structure of the display unit of the endless belt type in an embodiment of the present invention.

Fig. 3 is a structural schematic diagram of an endless belt-type display unit using a gear-type transmission belt in an embodiment of the present invention.

Fig. 4 is a structural schematic diagram of an endless belt type display unit in which the front scrolling axis is composed of two small cylindrical scrolling axes in an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a display device capable of switching pictures according to another embodiment of the present invention including manual manual drive.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings. In the figure, gears, bearings, transmission rods, and sheave mechanisms are idealized models, and should not be regarded as strictly showing their parameters and geometric dimensions. Here, the referenced figures are schematic illustrations of idealized embodiments of the present invention, and the illustrated embodiments of the present invention should not be considered limited to the particular shapes of the regions shown in the figures, but include resulting shapes, such as those caused by manufacturing. deviation. In this embodiment, some accessories are shown schematically, but this should not be considered as limiting the scope of the present invention.

The present invention provides a display device capable of switching pictures, which is characterized in that it includes:

A frame-shaped bracket;

A transmission unit; fixed on the frame support;

A drive unit; fixed on the frame-shaped support and mated with the transmission unit; and

A plurality of circular belt display units; the circular belt display unit includes:

a front roll axle;

a rear rolling axis, opposite and parallel to the front rolling axis;

a rolling belt wound between the front rolling shaft and the rear rolling shaft;

a layer of flexible material printed with pictures and adhered to said rolling belt;

a transmission wheel, arranged on the front rolling shaft and connected with the transmission unit; and

A plurality of fixed bearings are arranged on the front rolling shaft and the rear rolling shaft and are fixedly connected with the frame-shaped support;

Wherein, the plurality of circulating belt-type display units are spaced and juxtaposed on the frame-shaped support, and the sides of the plurality of circulating belt-type display units form a display panel.

As shown in Figure 1, in the first embodiment of the present invention, a display device capable of switching pictures is provided, which is characterized in that it includes:

A frame-shaped support 11;

A transmission unit 13; fixed on the frame-shaped bracket 11; the transmission unit 13 includes: an intermittent motion mechanism 132, used to cooperate with the drive unit 14; a primary driven wheel 133, arranged on a driven rod 134 and connected with the intermittent motion mechanism 132; a plurality of secondary driven wheels 135 are arranged on the driven rod 134 and are respectively connected with the transmission wheels 131 in the endless belt display unit 12;

A drive unit 14; fixed on the frame support 11 and connected with the transmission unit 13; the drive unit is a circuit drive, the circuit drive includes a drive circuit 141 and a motor 142; the drive The circuit 141 is a programmable circuit, which is used to control the rotation of the motor 142 to control the scrolling of the front scroll shaft 121 and the rear scroll shaft 122, so as to realize the switching display of pictures; and

A plurality of circular band display units 12;

As shown in FIG. 2, the circular belt display unit 12 includes:

A front rolling shaft 121;

a rear rolling shaft 122, opposite and parallel to the front rolling shaft 121;

a rolling belt 124 wound between the front rolling shaft 121 and the rear rolling shaft 122;

A layer of flexible material 125 printed with pictures and adhered to the rolling belt 124;

A transmission wheel 131 is arranged on the front rolling shaft 121 and is connected with the transmission unit 13; and

A plurality of fixed bearings 111 are arranged on the front rolling shaft 121 and the rear rolling shaft 122 and are fixedly connected with the frame-shaped support 11;

Wherein, the plurality of loop-type display units 12 are spaced and juxtaposed on the frame support 11 , and the side surfaces 1251 of the plurality of loop-type display units 12 form a display panel 112 .

The endless belt type display unit 12 also includes a plurality of scroll wheels 123, which are arranged on the front scroll shaft 121 and the rear scroll shaft 122, and are used to cooperate with the scroll belt 124; Belt 124 can be gear and gear transmission belt, can be pulley and belt, can be gear and hole type transmission belt etc.; Preferably in a preferred embodiment of the present invention, gear and gear transmission belt; As shown in Figure 3, described rolling What wheel 123 and rolling belt 124 applied is gear and gear transmission belt.

The intermittent motion mechanism 132 is an incomplete gear, a sheave mechanism, a cam mechanism, a planar link mechanism, a ratchet movement or a two-way pawl mechanism and the like. When the intermittent mechanism 132 is a sheave mechanism, the sheave mechanism includes a sheave and a round pin, and the round pin is inserted into the groove of the sheave to drive the sheave to rotate, and the display panel 112 switches pictures, When the round pin leaves the groove, the sheave stops rotating, and the picture of the display panel 112 remains; the number of the round pins of the sheave mechanism is 1, and the number of grooves is 3-12, and the switching time of the display panel 112 accounts for each 1/3~1/12 of the total animation time.

The circular belt display unit is strip or block, and the multiple circular belt display units are arranged horizontally, vertically, obliquely, in the shape of "Tian" or in the shape of "Pin", etc. Way; in a preferred embodiment of the present invention, the endless belt display unit 12 is preferably in a strip shape, and is preferably arranged in a horizontal direction.

Described front rolling shaft 121 and rear rolling shaft 122, its shape comprises cylindrical shape, plate shape, triangular prism shape, square prism shape, pentagonal prism shape, hexagonal prism shape etc.; Described front rolling shaft 121, rear rolling shaft 122 can be In order to be consistent, it can also be inconsistent; in a preferred embodiment of the present invention, the front rolling axis 121 or the rear rolling axis 122 is composed of two small cylindrical rolling axes. As shown in Figure 4, in a preferred embodiment of the present invention, the front rolling shaft 121 is composed of two small cylindrical rolling shafts (1211 and 1212), and the two small cylindrical rolling shafts are separated by a certain distance, The flexible material layer 125 is stretched to a certain width to form a narrow strip 1251. The width of the narrow strip 1251 is equal to the effective width of the rear scrolling shaft. The shape 1251 constitutes the display panel 112 . The significant advantage of this embodiment is that the influence of the arc structure is reduced, and the display panel 112 is flattened, which is easy for viewers to watch.

The driving device (14) includes clockwork driving, manual hand cranking or rotation, and circuit driving; in a preferred embodiment of the present invention, the driving device (14) is circuit driving. The circuit drive includes a drive circuit (141) and a motor (142); the drive circuit is a programmable circuit for controlling the scrolling of the scroll axis, including forward rotation, reverse rotation, and stop; the display panel (112 ) to play animation, switch static pictures, and alternate between dynamic animation and static pictures, and the programmable circuit can control the forward sequence playback and reverse sequence playback of animation.

All the front scrolling shafts 121 and the rear scrolling shafts 122 can be driven by a motor, or several groups of front scrolling shafts and rear scrolling shafts can be controlled by a motor, or all the front scrolling shafts or all the rear scrolling shafts can be controlled by a motor; In a preferred embodiment of the present invention, all front rolling shafts 121 are driven by a motor 142 .

The described display device capable of switching pictures can include front and rear double display panels, or only a single display panel. In this embodiment, a single display panel 112 is preferably included; the display panel can realize static picture switching display, animation display, or cross-display of animation and static pictures; wherein, if the plurality of narrow strip sides 1251 of the flexible material layer 125 printed with pictures are formed at different times when the display panel 112 is an independent picture, the static picture switching display can be realized ; If the plurality of narrow strip sides 1251 of the flexible material layer 125 printed with pictures are associated animation pictures at different times, control the fast intermittent scrolling of the front scroll shaft 121 to realize animation display; When the plurality of narrow strip-shaped sides 1251 of the flexible material layer 125 printed with pictures are formed at different times, when a part of the display panel 112 is unrelated and a part is an associated animation picture, the scrolling of the front scroll shaft 121 is controlled to realize The animation on the display panel 112 is interspersed with the static picture.

The working principle of this embodiment is described as follows:

The programmable drive circuit 141 drives the front scroll shaft 121 of the endless belt type display unit 12 to roll through the transmission unit 13 including the sheave mechanism 132, including forward rotation, reverse rotation and stop, and drives the flexible material layer 125 printed with pictures, Because the round pin number of the sheave mechanism 132 is 1 and the number of grooves is 4, the front and rear rolling shafts realize rotation for 1/4 time and stop for 3/4 time. In one rotation, the running length of the flexible material layer printed with pictures is just The width of the narrow strip picture 1251 is programmed to control the running stop time of the driving circuit 141, so that the display panel 112 can display various effects such as animation display, static picture switching, and dynamic and static mixed display.

As shown in FIG. 5, in the second embodiment of the present invention, a display device capable of switching pictures is provided, which is characterized in that it includes:

A frame-shaped support 11;

A transmission unit 13; fixed on the frame-shaped bracket 11; the transmission unit 13 includes: an intermittent motion mechanism 132, used to cooperate with the drive unit 14; a primary driven wheel 133, arranged on a driven rod 134 and connected with the intermittent motion mechanism 132; a plurality of secondary driven wheels 135 are arranged on the driven rod 134 and are respectively connected with the transmission wheels 131 in the endless belt display unit 12;

A drive unit 14; fixed on the frame-shaped support 11 and connected with the transmission unit 13; the drive unit is an artificial hand crank, including an artificial hand crank, by shaking the artificial hand crank Then control the scrolling of the front scrolling shaft 121 and the rear scrolling shaft 122 to realize switching display of pictures; and

A plurality of circular band display units 12;

As shown in FIG. 2, the circular belt display unit 12 includes:

A front rolling shaft 121;

a rear rolling shaft 122, opposite and parallel to the front rolling shaft 121;

a rolling belt 124 wound between the front rolling shaft 121 and the rear rolling shaft 122;

A layer of flexible material 125 printed with pictures and adhered to the rolling belt 124;

A transmission wheel 131 is arranged on the front rolling shaft 121 and is connected with the transmission unit 13; and

A plurality of fixed bearings 111 are arranged on the front rolling shaft 121 and the rear rolling shaft 122 and are fixedly connected with the frame-shaped support 11;

Wherein, the plurality of loop-type display units 12 are spaced and juxtaposed on the frame support 11 , and the side surfaces 1251 of the plurality of loop-type display units 12 form a display panel 112 .

The endless belt type display unit 12 also includes a plurality of scroll wheels 123, which are arranged on the front scroll shaft 121 and the rear scroll shaft 122, and are used to cooperate with the scroll belt 124; Belt 124 can be gear and gear transmission belt, can be pulley and belt, can be gear and hole type transmission belt etc.; Preferred in a preferred embodiment of the present invention, gear and hole type transmission belt.

The intermittent motion mechanism 132 is an incomplete gear, a sheave mechanism, a cam mechanism, a planar link mechanism, a ratchet movement or a two-way pawl mechanism and the like. When the intermittent mechanism 132 is a sheave mechanism, the sheave mechanism includes a sheave and a round pin, and the round pin is inserted into the groove of the sheave to drive the sheave to rotate, and the display panel 112 switches pictures, When the round pin leaves the groove, the sheave stops rotating, and the picture of the display panel 112 remains; the number of the round pins of the sheave mechanism is 1, and the number of grooves is 3-12, and the switching time of the display panel 112 accounts for each 1/3~1/12 of the total animation time.

The circular belt-type display unit is strip-shaped or block-shaped, etc., and the multiple circular belt-type display units are arranged horizontally, vertically, obliquely, in the shape of "Tian" or in the shape of "Pin", etc. Arrangement mode: In a preferred embodiment of the present invention, the display unit 12 of endless belt type is preferably arranged in a strip shape, and is preferably arranged in a horizontal direction.

Described front rolling shaft 121 and rear rolling shaft 122, its shape comprises cylindrical shape, plate shape, triangular prism shape, square prism shape, pentagonal prism shape, hexagonal prism shape etc.; Described front rolling shaft 121, rear rolling shaft 122 can be In order to be consistent, it can also be inconsistent; in a preferred embodiment of the present invention, the front rolling shaft 121 or the rear rolling shaft 122 can also be composed of two small cylindrical rolling shafts. As shown in Figure 4, in a preferred embodiment of the present invention, the front rolling shaft 121 is composed of two small cylindrical rolling shafts (1211 and 1212), and the two small cylindrical rolling shafts are separated by a certain distance, The flexible material layer 125 is stretched to a certain width to form a narrow strip 1251. The width of the narrow strip 1251 is equal to the effective width of the rear scrolling shaft. The shape 1251 constitutes the display panel 112 . The significant advantage of this embodiment is that the influence of the arc structure is reduced, and the display panel 112 is flattened, which is easy for viewers to watch.

The driving device (14) includes clockwork driving, manual manual or rotating and circuit driving; in a preferred embodiment of the present invention, the driving device (14) is clockwork driving.

The described display device capable of switching pictures can include front and rear double display panels, or only a single display panel. In this embodiment, a single display panel 112 is preferably included; the display panel can realize static picture switching display, animation display, or cross-display of animation and static pictures; wherein, if the plurality of narrow strip sides 1251 of the flexible material layer 125 printed with pictures are formed at different times when the display panel 112 is an independent picture, the static picture switching display can be realized ; If the plurality of narrow strip sides 1251 of the flexible material layer 125 printed with pictures are associated animation pictures at different times, control the fast intermittent scrolling of the front scroll shaft 121 to realize animation display; When the plurality of narrow strip-shaped sides 1251 of the flexible material layer 125 printed with pictures are formed at different times, when a part of the display panel 112 is unrelated and a part is an associated animation picture, the scrolling of the front scroll shaft 121 is controlled to realize The animation on the display panel 112 is interspersed with the static picture.

This embodiment is a typical toy, and can be applied to the display field of toys; the working principle of this embodiment is as follows:

The user provides kinetic energy for the device through manual hand crank or clockwork drive, and drives the front rolling shaft 121 to turn over intermittently through the transmission unit 13 containing the sheave mechanism 132, including forward rotation, reverse rotation and stop. The material layer 125 moves, and the effect represented on the display panel 112 is: the time of the screen switching process of the display panel 112 is 1/4, and the dwell time of the display panel 112 is 3/4. Due to the visual effect, an animation is displayed in front of the user.

To sum up, the present invention provides a display device capable of switching pictures, which divides the display panel 112 into several narrow strip segments, and realizes animation display by switching pictures of each narrow strip segment; wherein, each The switching scheme of a narrow strip segment adopts the rolling shaft to drive the flexible material layer printed with pictures, and the flexible material layer is printed with multiple narrow strip-shaped pictures, while driving the flexible material layer with pictures, corresponding to the display panel The picture on 112 is switched, and multiple groups of circulating belt display units 12 work simultaneously, finally realizing the animation display of display panel 112 .

The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (10)

1. A display device capable of switching pictures, comprising:

a frame-shaped support;

a transmission unit; fixed on the frame-shaped bracket;

a driving unit; the transmission unit is fixed on the frame-shaped bracket and is matched and connected with the transmission unit; and

a plurality of endless belt display units; the endless belt type display unit includes:

a front roll shaft;

the rear rolling shaft is opposite to and parallel to the front rolling shaft;

the rolling belt is wound between the front rolling shaft and the rear rolling shaft;

a flexible material layer printed with a picture and adhered to the rolling strip;

the transmission wheel is arranged on the front rolling shaft and is matched and connected with the transmission unit; and

the fixed bearings are arranged on the front rolling shaft and the rear rolling shaft and are fixedly connected with the frame-shaped bracket;

the plurality of circulating belt type display units are arranged on the frame-shaped support at intervals, and the side faces of the plurality of circulating belt type display units form a display panel.

2. The display device capable of switching pictures according to claim 1, wherein: the transmission unit includes: the intermittent motion mechanism is used for being matched and connected with the driving unit; the primary driven wheel is arranged on a driven rod and is matched and connected with the intermittent motion mechanism; and the secondary driven wheels are arranged on the driven rods and are respectively matched and connected with the driving wheels in the circulating belt type display unit.

3. The display device capable of switching pictures according to claim 2, wherein: the intermittent motion mechanism is an incomplete gear, a geneva gear, a cam mechanism, a plane link mechanism, a ratchet motion or a bidirectional pawl mechanism.

4. The display device capable of switching pictures according to claim 3, wherein: the grooved wheel mechanism comprises a grooved wheel and a round pin, the round pin is inserted into a groove of the grooved wheel to drive the grooved wheel to rotate, the picture is switched by the display panel, when the round pin leaves the groove, the grooved wheel stops rotating, and the picture of the display panel is kept; the number of round pins of the geneva mechanism is 1, the number of grooves is 3-12, and the switching time of the display panel accounts for 1/3-1/12 of the total time of each animation picture.

5. The display device capable of switching pictures according to claim 1, wherein: the driving unit is driven by a spring, a manual hand or a circuit.

6. The display device capable of switching pictures according to claim 5, wherein: the circuit driver comprises a driving circuit and a motor; the driving circuit is a programmable circuit and is used for controlling the motor to rotate so as to control the front rolling shaft and the rear rolling shaft to roll, and switching and displaying pictures.

7. The display device capable of switching pictures according to claim 1, wherein: the circulating belt type display units are in a strip shape or a block shape, and the plurality of circulating belt type display units are transversely arranged, longitudinally arranged, obliquely arranged, arranged in a shape like the Chinese character 'tian' or arranged in a shape like the Chinese character 'pin'.

8. The display device capable of switching pictures according to claim 1, wherein: the circulating belt type display unit also comprises a plurality of rolling wheels which are arranged on the front rolling shaft and the rear rolling shaft and are used for being matched and connected with the rolling belts; the rolling wheel and the rolling belt are a gear and gear transmission belt, a belt pulley and belt or a gear and hole type transmission belt.

9. The display device capable of switching pictures according to claim 1, wherein: the front rolling shaft is composed of two small cylindrical rolling shafts, the two small cylindrical rolling shafts are spaced at a certain distance, the flexible material layer is pulled open by a certain width to form a narrow strip shape, the width of the narrow strip shape is equal to the effective width of the rear rolling shaft, and the display panel is formed by narrow strip shapes in the plurality of circulating belt type display units.

10. The display device capable of switching pictures according to claim 1, wherein: the display panel can realize static picture switching display, animation display or animation and static picture cross display; wherein,

if the display panels formed by the plurality of flexible material layers printed with the pictures at different time are independent pictures, switching and displaying the static pictures;

if the display panels formed by the plurality of flexible material layers printed with pictures at different time are associated animation pictures, controlling the front rolling shaft to rapidly roll intermittently to realize animation display;

if the display panel formed by the plurality of flexible material layers printed with pictures at different times is partially unrelated and partially related animation pictures, the rolling of the front rolling shaft is controlled, and the display panel animation and the static pictures are displayed in a crossed manner.

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