Display device and control method of display device

Abstract

This invention discloses a display device and a control method for the display device, relating to the field of display technology. The display device includes a scroll and a screen body connected to the scroll at one end. The display device also includes a first driving layer and a second driving layer, which are attached to each other and disposed on the back of the screen body. The first driving layer is an elastic memory layer and is naturally curled. The second driving layer includes a first flexible liquid reservoir, a second flexible liquid reservoir, and a power pump. The first flexible liquid reservoir is located on the side of the second driving layer closest to the scroll. The second flexible liquid reservoir is located on the side of the second driving layer away from the scroll and communicates with the first flexible liquid reservoir. A shear-thinning fluid is disposed within the first and / or second flexible liquid reservoirs. A power pump is disposed within both the first and second flexible liquid reservoirs, and the power pump drives the shear-thinning fluid to flow between the first and second flexible liquid reservoirs. This invention can reduce the risk of creases appearing on the display screen.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display device and a method for controlling the display device. Background Technology

[0002] To reduce the space occupied by display devices, roll-to-roll display technology emerged. However, traditional roll-to-roll displays typically only have a fixed unfolding path, which causes the screen material to be repeatedly subjected to high stress, making it prone to creases or permanent damage. Summary of the Invention

[0003] The main objective of this invention is to provide a display device and a control method for the display device, which aims to improve the problem of creases easily occurring in traditional rollable displays.

[0004] To achieve the above objectives, the present invention proposes a display device comprising a scroll and a screen body, one end of which is connected to the scroll. The display device further comprises a first driving layer and a second driving layer, the first driving layer and the second driving layer being attached to each other and disposed on the back side of the screen body. The first driving layer is an elastic memory layer, which is naturally curled. The second driving layer comprises a first flexible liquid reservoir, a second flexible liquid reservoir, and a power pump. The first flexible liquid reservoir is disposed on the side of the second driving layer near the scroll. The second flexible liquid reservoir is disposed on the side of the second driving layer away from the scroll and is in communication with the first flexible liquid reservoir. A shear-thinning fluid is disposed within the first flexible liquid reservoir and / or the second flexible liquid reservoir. The power pump is disposed within both the first and second flexible liquid reservoirs, and the power pump drives the shear-thinning fluid to flow between the first and second flexible liquid reservoirs.

[0005] In one embodiment, the first flexible liquid storage cavity arches outward from the first driving layer in a direction away from the first driving layer, forming a first protrusion. The extending direction of the first protrusion is set at an angle to the radial direction of the spool.

[0006] And / or, the second flexible liquid storage cavity arches toward the cavity wall of the first driving layer in a direction away from the first driving layer, forming a second protrusion, the extension direction of the second protrusion being set at an angle to the radial direction of the spool.

[0007] In one embodiment, the side of the first flexible liquid storage cavity away from the spool is arc-shaped, and the arc-shaped surface arches in a direction away from the spool.

[0008] In one embodiment, the second driving layer further includes a first connecting channel, the two ends of which are respectively connected to the first flexible liquid storage cavity and the second flexible liquid storage cavity.

[0009] In one embodiment, the opening size of the first connecting channel gradually increases in the direction from the first flexible liquid storage cavity to the second flexible liquid storage cavity.

[0010] In one embodiment, the second driving layer further includes a second connection channel, which is intersected with and communicates with the first connection channel.

[0011] In one embodiment, the first connection channel intersects with the second connection channel to form an intersection portion; in a direction perpendicular to the screen body, the size of the intersection portion is larger than the size of the first connection channel and the size of the second connection channel.

[0012] In one embodiment, the first driving layer has a buffer layer on the side facing the screen body, and the buffer layer has a plurality of protruding structures distributed on the side facing the screen body.

[0013] In one embodiment, the display device further includes a protective layer disposed on the side of the second driving layer opposite to the screen body.

[0014] The present invention also proposes a control method based on the above-mentioned display device, the control method of the display device comprising: Obtain the current screen subject's state switching signal; The state switching signal was detected as a switch to the unfolded state; The power pump is controlled to pressurize the shear-thinning fluid in the first flexible liquid storage chamber.

[0015] In one embodiment, the step of controlling the power pump to pressurize the shear-thinning fluid in the first flexible reservoir further includes: The pressure difference between the first flexible liquid storage chamber and the second flexible liquid storage chamber was detected to be zero; Control the power pump to stop.

[0016] In one embodiment, after the step of obtaining the current screen subject's state switching signal, the method further includes: The current state switching signal was detected as a switch to the take-up state; The power pump is controlled to pressurize the shear-thinning fluid in the second flexible reservoir.

[0017] In one embodiment, the step of controlling the power pump to pressurize the shear-thinning fluid in the second flexible reservoir further includes: The pressure difference between the first flexible liquid storage chamber and the second flexible liquid storage chamber was detected to be zero; Control the power pump to stop.

[0018] The display device in the technical solution of the present invention includes a scroll and a screen body. One end of the screen body is connected to the scroll. The display device also includes a first driving layer and a second driving layer disposed on the back of the screen body. The first driving layer is an elastic memory layer, which is naturally curled up, so the screen body can be rolled up on the scroll by means of the first driving layer. In addition, the second driving layer of the display device includes a first flexible liquid storage cavity, a second flexible liquid storage cavity, and a power pump. The first flexible liquid storage cavity and the second flexible liquid storage cavity are respectively disposed on the side of the second driving layer near the scroll and the side away from the scroll. The first flexible liquid storage cavity and / or the second flexible liquid storage cavity are provided with a shear-thinning fluid. The first flexible liquid storage cavity and the second flexible liquid storage cavity are provided with a power pump. Under the action of the power pump, the shear-thinning fluid can be pressurized, thereby reducing the viscosity of the shear-thinning fluid, so that it flows more smoothly between the first flexible liquid storage cavity and the second flexible liquid storage cavity, thereby changing the pressure and volume in the first flexible liquid storage cavity and the second flexible liquid storage cavity.

[0019] For example, when the power pump in the first flexible liquid storage chamber pressurizes the shear-thinning fluid in the first flexible liquid storage chamber, the shear-thinning fluid flows from the first flexible liquid storage chamber to the second flexible liquid storage chamber, creating a certain pressure difference between the first and second flexible liquid storage chambers. When the pressure in the first and second flexible liquid storage chambers returns to equilibrium, the shear-thinning fluid stops flowing, thus achieving a good stabilizing effect, enabling the shear-thinning fluid to unfold the screen body and maintain stability. When the power pump in the second flexible liquid storage chamber pressurizes the shear-thinning fluid in the second flexible liquid storage chamber, the shear-thinning fluid flows from the second flexible liquid storage chamber to the first flexible liquid storage chamber, creating a pressure difference between the two chambers. At this time, the viscosity of the shear-thinning fluid decreases, reducing its support. Furthermore, due to the natural curling effect of the first driving layer, the screen body begins to roll up. When the pressure in the first and second flexible liquid storage chambers returns to equilibrium, the shear-thinning fluid stops flowing. At this point, there is less shear-thinning fluid in the second flexible liquid storage chamber, which is further away from the scroll, making it difficult to overcome the natural curling force of the first driving layer. Thus, the screen body is successfully wound onto the scroll.

[0020] In this process, there is no need to use hinges or other mechanical structures to drive the screen body to unfold or retract. Instead, the unfolding and retracting effects of the screen body are achieved by the pushing action of the shear-thinning fluid and the elastic effect of the elastic memory layer itself. This driving method is relatively gentle and has a good buffering effect, thereby reducing the risk of creases on the screen body. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the display device according to Embodiment 1 of the present invention; Figure 2 This is a top view of the first driving layer in the display device according to Embodiment 1 of the present invention; Figure 3 This is a top view of the second driving layer in the display device according to Embodiment 1 of the present invention; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 for Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a schematic flowchart illustrating an example of the control method for a display device according to Embodiment 2 of the present invention. Figure 7 A schematic flowchart illustrating another example of the control method for the display device provided in Embodiment 2 of the present invention; Figure 8 A schematic flowchart illustrating yet another example of the control method for the display device provided in Embodiment 2 of the present invention; Figure 9 This is a flowchart illustrating yet another example of the control method for the display device provided in Embodiment 2 of the present invention.

[0023] Explanation of icon numbers: 100. Scroll; 200. Main body of the screen; 300, First driving layer; 310, Protruding structure; 400, Second driving layer; 410, First flexible liquid storage cavity; 411, First protrusion; 420, Second flexible liquid storage cavity; 421, Second protrusion; 430, First connecting channel; 440, Second connecting channel; 450, Confluence; 500. Protective layer.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] With the rapid development of automotive intelligence, in-vehicle displays are no longer limited to traditional instrument displays but are gradually taking on multiple functions such as entertainment and information interaction. The application of rear-seat entertainment screens can provide a dedicated entertainment space, enhancing the passenger experience and the vehicle's technological feel. However, most existing rear-seat entertainment screens are fixed or folding, occupying a large amount of space, and their screen angles are fixed. While rollable screens could replace traditional entertainment screens, traditional rollable screens use a dual-motor driven roll system, relying on a fixed diameter roll, which can only achieve a fixed opening and closing path. Furthermore, the fixed rotation point of traditional hinges or roll mechanisms causes the screen material to be repeatedly subjected to high stress, easily resulting in creases or permanent damage.

[0029] Example 1: In order to improve the problem that traditional display devices' rollable screens are prone to creases after repeated rolling, this invention proposes a display device.

[0030] Please refer to the reference. Figures 1 to 3 In one embodiment of the present invention, the display device includes a scroll 100 and a screen body 200, one end of which is connected to the scroll 100. The display device also includes a first driving layer 300 and a second driving layer 400, which are attached to each other and disposed on the back side of the screen body 200. The first driving layer 300 is an elastic memory layer, which is naturally curled. The second driving layer 400 includes a first flexible liquid storage chamber 410, a second flexible liquid storage chamber 420, and a power pump. The first flexible liquid storage chamber 410 is located on the side of the second drive layer 400 near the roll 100; the second flexible liquid storage chamber 420 is located on the side of the second drive layer 400 away from the roll 100 and can communicate with the first flexible liquid storage chamber 410; the first flexible liquid storage chamber 410 and / or the second flexible liquid storage chamber 420 are provided with shear-thinning fluid; both the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 are provided with power pumps, and the power pumps drive the shear-thinning fluid to flow between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420.

[0031] The scroll 100 is a support component used for winding the screen body 200. One end of the screen body 200 is connected to the scroll 100, and the other end is a free end. To facilitate winding the screen body 200 onto the scroll 100, the screen body 200 is a flexible screen. It should be noted that this flexible screen is a technology known to those skilled in the art and will not be described in detail here. When viewing the image, the end of the screen body 200 away from the scroll 100 hangs down, so that the screen body 200 is in a vertical state. Alternatively, to facilitate user viewing, the screen body 200 can be set to be tilted at an angle to the vertical direction. To facilitate driving the screen body 200 to wind onto or unwind from the scroll 100, the display device in the present invention further includes a first driving layer 300 and a second driving layer 400. The first driving layer 300 is an elastic memory layer, which means that it is in a curled state in its natural state and can be flattened under external force. It should be noted that this type of material with elastic memory is common knowledge to those skilled in the art and will not be described in detail here. The first driving layer 300 and the second driving layer 400 are bonded together, either by adhesive or by mutual contact. When the first driving layer 300 and the second driving layer 400 are located on the back of the screen body 200, the first driving layer 300 can be located between the back of the screen body 200 and the second driving layer 400, or the second driving layer 400 can be located between the back of the screen body 200 and the first driving layer 300. With this arrangement, under the driving action of the first driving layer 300, the second driving layer 400 can be wound together with the first driving layer 300, thereby achieving the effect of the first driving layer 300, the second driving layer 400, and the screen body 200 being wound together on the scroll 100; it can also be that under the driving action of the second driving layer 400, the first driving layer 300 and the screen body 200 are stretched to a flattened state. It should be noted that the back of the screen body 200 refers to the side away from the display screen of the screen body 200, that is, the side of the screen body 200 that displays the image is the front of the screen body 200.

[0032] The second driving layer 400 includes a first flexible liquid storage cavity 410 and a second flexible liquid storage cavity 420. Both the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 are cavities capable of flexible deformation, meaning their volumes are variable. The cavity walls of the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 can be made of membrane structures or other deformable materials to achieve optimal flexible deformation. The first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 are respectively located on the side of the second driving layer 400 closest to the roller 100 and the side of the second driving layer 400 furthest from the roller 100. Specifically, the projected area of ​​the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 on the second driving layer 400 will occupy the entire area of ​​the second driving layer 400; for example, the volumes of the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 may be the same or different. The projected area of ​​the two flexible liquid storage cavities 420 on the second driving layer 400 is smaller than the total area of ​​the second driving layer 400. For example, the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 are respectively located at the end of the second driving layer 400 near the spool 100 and the end of the second driving layer 400 away from the spool 100. In order to achieve the communication effect between the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420, the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 can be connected through other channels.

[0033] Shear-thinning fluids are fluids that exhibit high viscosity at rest or low shear rates, but whose viscosity decreases as the shear rate increases, for example, through stirring or compression, due to rearrangement of their internal structure. Examples of shear-thinning fluids include polyethylene oxide, polyacrylamide, and sodium carboxymethyl cellulose. When pressure is applied to the fluid, its viscosity decreases, resulting in good flowability; however, when pressure is released, the fluid exhibits high viscosity, displaying a stable, solid-like state. Specifically, the shear-thinning fluid can be disposed within a first flexible reservoir 410, a second flexible reservoir 420, or partially within both.

[0034] The power pump can be a piezoelectric pump or other booster pump. It can drive the shear-thinning fluid to flow between the first flexible reservoir 410 and the second flexible reservoir 420. For example, when a power pump is installed in the first flexible reservoir 410, it can push the shear-thinning fluid into the second flexible reservoir 420. When a power pump is installed in the second flexible reservoir 420, it can push the shear-thinning fluid into the first flexible reservoir 410. Under the action of the first driving layer 300, the screen body 200 is in a rolled-up state. At this time, the first flexible reservoir 410 stores a large amount of shear-thinning fluid, while the second flexible reservoir 420 stores a small amount of shear-thinning fluid.

[0035] When the main screen 200 needs to be unfolded, the shear-thinning fluid in the first flexible liquid storage chamber 410 can be pressurized by a power pump, thereby increasing the pressure in the first flexible liquid storage chamber 410. This pushes the shear-thinning fluid in the first flexible liquid storage chamber 410 into the second flexible liquid storage chamber 420. After a portion of the shear-thinning fluid flows out of the first flexible liquid storage chamber 410, the volume of the first flexible liquid storage chamber 410 is compressed. Meanwhile, the shear-thinning fluid flows into the second flexible liquid storage chamber 420, causing the volume of the second flexible liquid storage chamber 420 to increase. A negative pressure is formed in the second flexible liquid storage chamber 420, thereby creating a pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420, thus achieving the effect of pushing the shear-thinning fluid into the second flexible liquid storage chamber 420. Understandably, the viscosity of the shear-thinning fluid decreases under compression, resulting in good fluidity and thus better guiding the shear-thinning fluid to the second flexible reservoir 420. When the shear-thinning fluid simultaneously fills the first flexible reservoir 410 and the second flexible reservoir 420, the pressure difference eventually disappears, the power pump is turned off, the flow of the shear-thinning fluid stops, and the shear-thinning fluid is in a static state. As a result, the viscosity of the shear-thinning fluid increases, forming a stable structure. The second flexible reservoir 420 stores a large amount of shear-thinning fluid, while the first flexible reservoir 410 stores a small amount of shear-thinning fluid, overcoming the curling force of the elastic memory layer to achieve the effect of rigidly supporting the screen body 200 and keeping the screen body 200 in an unfolded state.

[0036] When the screen body 200 needs to be rolled up, the power pump pressurizes the shear-thinning fluid in the second flexible reservoir 420, thereby increasing the pressure inside the second flexible reservoir 420 to push the shear-thinning fluid in the second flexible reservoir 420 into the first flexible reservoir 410. It is understood that the viscosity of this shear-thinning fluid decreases under compression, resulting in good fluidity and significantly reduced support force. During the outflow of the shear-thinning fluid from the second flexible reservoir 420, combined with the driving force of the natural curling of the first driving layer 300 (which is an elastic memory layer), the volume of the second flexible reservoir 420 is compressed. Meanwhile, the shear-thinning fluid flows into the first flexible reservoir 410, causing the volume inside the first flexible reservoir 410 to increase, creating a negative pressure inside the first flexible reservoir 410. This creates a pressure difference between the first flexible reservoir 410 and the second flexible reservoir 420, thereby achieving the effect of pushing the shear-thinning fluid into the first flexible reservoir 410. When the shear-thinning fluid simultaneously fills the first flexible reservoir 410 and the second flexible reservoir 420, the pressure difference eventually disappears, and the power pump is shut off. The flow of the shear-thinning fluid stops, and the shear-thinning fluid is in a static state. As a result, the viscosity of the shear-thinning fluid increases, forming a stable structure. The first flexible reservoir 410 stores a large amount of shear-thinning fluid, and the second flexible reservoir 420 stores a small amount of shear-thinning fluid. In this process, combined with the continuous driving action of the first driving layer 300, the effect of rolling the screen body 200 into the scroll 100 is achieved.

[0037] The display device in the technical solution of the present invention includes a scroll 100 and a screen body 200. One end of the screen body 200 is connected to the scroll 100. The display device also includes a first driving layer 300 and a second driving layer 400 disposed on the back of the screen body 200. The first driving layer 300 is an elastic memory layer, which is naturally curled, so the screen body 200 can be rolled up on the scroll 100 by means of the first driving layer 300. In addition, the second driving layer 400 of the display device includes a first flexible liquid storage chamber 410, a second flexible liquid storage chamber 420, and a power pump. Two flexible liquid storage chambers 420 are respectively located on the side of the second drive layer 400 near the roller 100 and the side away from the roller 100. The first flexible liquid storage chamber 410 and / or the second flexible liquid storage chamber 420 contain a shear-thinning fluid. The first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 are equipped with a power pump. Under the action of the power pump, the shear-thinning fluid can be pressurized, thereby reducing the viscosity of the shear-thinning fluid and allowing it to flow more smoothly between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420, thereby changing the pressure and volume in the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420.

[0038] For example, when the power pump in the first flexible liquid storage chamber 410 pressurizes the shear-thinning fluid in the first flexible liquid storage chamber 410, the shear-thinning fluid flows from the first flexible liquid storage chamber 410 to the second flexible liquid storage chamber 420, and causes a certain pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420. When the pressure in the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is made consistent again, the shear-thinning fluid stops flowing, thus achieving a good stabilizing effect, so as to realize the effect of the shear-thinning fluid unfolding the screen body 200 and maintaining stability. When the power pump in the second flexible liquid storage chamber 420 pressurizes the shear-thinning fluid in the second flexible liquid storage chamber 420, the shear-thinning fluid flows from the second flexible liquid storage chamber 420 to the first flexible liquid storage chamber 410, resulting in a certain pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420. At this time, on the one hand, the viscosity of the shear-thinning fluid decreases, and its support decreases. On the other hand, due to the driving effect of the natural curling of the first driving layer 300, the screen body 200 begins to roll up. When the pressure in the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is aligned again, the shear-thinning fluid stops flowing. At this time, there is less shear-thinning fluid in the second flexible liquid storage chamber 420, which is far away from the scroll 100. It is difficult to overcome the driving force of the natural curling of the first driving layer 300. Therefore, the effect of winding the screen body 200 onto the scroll 100 is achieved.

[0039] In this process, there is no need to use hinges or other mechanical structures to drive the screen body 200 to unfold or retract. Instead, the unfolding and retracting effects of the screen body 200 are achieved by the pushing action of the shear-thinning fluid and the elastic effect of the elastic memory layer itself. This driving method is relatively gentle and has a good buffering effect, thereby reducing the risk of creases appearing on the screen body 200.

[0040] Please refer to the reference. Figure 3 and Figure 4 In one example of the present invention, the first flexible liquid storage cavity 410 arches toward the cavity wall of the first driving layer 300 in a direction away from the first driving layer 300, and forms a first protrusion 411. The extending direction of the first protrusion 411 is set at an angle to the radial direction of the roll 100.

[0041] It is understood that a portion of the cavity wall of the first flexible liquid storage cavity 410 can be formed by the second driving layer 400, and another portion can be formed by the first driving layer 300; or the entire cavity wall of the first flexible liquid storage cavity 410 can be formed by the second driving layer 400. The first protrusion 411 can be V-shaped, W-shaped, or U-shaped, etc. It is understood that when the first protrusion 411 is set to V-shaped, the radius of curvature of the first flexible liquid storage cavity 410 of the second driving layer 400 can better match the radius of curvature of the scroll 100 after the screen body 200 is rolled up, thereby achieving a tighter rolling effect. One or more first protrusions 411 can be provided. Multiple first protrusions 411 are distributed radially along the scroll 100.

[0042] By forming a first protrusion 411 by arching the cavity wall of the first flexible liquid storage cavity 410 toward the direction away from the first driving layer 300, and setting the extension direction of the first protrusion 411 at an angle to the radial direction of the roll 100, the volume of the first flexible liquid storage cavity 410 can be expanded. This allows the first protrusion 411 to be flattened during the unfolding of the screen body 200, thereby allowing more shear-thinning fluid to flow into the second flexible liquid storage cavity 420, achieving a better unfolded state of the screen body 200. On the other hand, when the screen is rolled up, the multiple first protrusions 411 are stacked on each other due to being squeezed radially by the roll 100, reducing the possibility of random wrinkling of other cavity walls of the first flexible liquid storage cavity 410. Furthermore, the increased volume of the first flexible liquid storage cavity 410 generates negative pressure, which is more conducive to attracting the shear-thinning fluid to flow over.

[0043] Please refer to the reference. Figure 3 and Figure 5 In one example of the present invention, the second flexible liquid storage cavity 420 arches toward the cavity wall of the first driving layer 300 in a direction away from the first driving layer 300, and forms a second protrusion 421. The extension direction of the second protrusion 421 is set at an angle to the radial direction of the roll 100.

[0044] Specifically, a portion of the cavity wall of the second flexible liquid storage cavity 420 can be formed by the second driving layer 400, and another portion can be formed by the first driving layer 300; or the entire cavity wall of the second flexible liquid storage cavity 420 can be formed by the second driving layer 400. The second protrusion 421 can be V-shaped, W-shaped, or U-shaped, etc. It is understood that when the second protrusion 421 is U-shaped, the second protrusion 421 at the second flexible liquid storage cavity 420 of the second driving layer 400 can have a stable support state after the screen body 200 is unfolded. There can be one or more second protrusions 421. Multiple first protrusions 411 are distributed radially along the scroll 100.

[0045] By forming a second protrusion 421 on one side of the cavity wall of the second flexible liquid storage cavity 420, the volume of the second flexible liquid storage cavity 420 can be expanded. As a result, the second protrusion 421 can be flattened during the unfolding of the screen body 200, allowing more shear-thinning fluid to flow into the first flexible liquid storage cavity 410, thus achieving a better unfolding state of the screen body 200. In addition, when the screen is rolled up, under the driving action of the first driving layer 300, multiple second protrusions 421 are squeezed and stacked on each other, reducing the possibility of random wrinkling of the cavity wall of the second flexible liquid storage cavity 420, and reducing the volume of the second flexible liquid storage cavity 420, which is conducive to squeezing the shear-thinning fluid to flow into the first flexible liquid storage cavity 410.

[0046] like Figure 3 As shown, in one example of the present invention, the side of the first flexible liquid storage cavity 410 away from the roll 100 is arc-shaped, and the arc-shaped surface arches in the direction away from the roll 100.

[0047] By arching the arc surface away from the spool 100, the circle of the arc surface is located on the side of the first flexible liquid storage cavity 410 closer to the spool 100. This facilitates the bending and winding of the screen body 200 toward the spool 100 after the shear-thinning fluid flows into the first flexible liquid storage cavity 410, thereby facilitating the winding process of the screen body 200.

[0048] like Figure 3 As shown, in one example of the present invention, the second driving layer 400 further includes a first connecting channel 430, the two ends of which are respectively connected to the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420.

[0049] This configuration facilitates the distribution of shear-thinning fluid in the first flexible reservoir 410, the second flexible reservoir 420, and the connecting channel along the radial direction of the scroll 100. This enhances the support effect of the shear-thinning fluid on all parts of the screen body 200, thereby improving the stability of the screen body 200 after it is unfolded.

[0050] Specifically, the first connecting channel 430 may have one or more channels, and the first connecting channel 430 may be a rectangular channel, a cylindrical channel, or a channel of other shapes.

[0051] like Figure 3 As shown, in one example of the present invention, the opening size of the first connecting channel 430 gradually increases in the direction from the first flexible liquid storage cavity 410 to the second flexible liquid storage cavity 420.

[0052] This configuration reduces the resistance to the flow of shear-thinning fluid during the unfolding process, thereby improving the efficiency of unfolding the main screen 200.

[0053] like Figure 3 As shown, in one example of the present invention, the second driving layer 400 further includes a second connection channel 440, which is intersected with the first connection channel 430 and communicates with the first connection channel 430.

[0054] By setting a second connecting channel 440, which is intersected with the first connecting channel 430, the shear-thinning fluid flowing out of the first flexible liquid storage chamber 410 or the second flexible liquid storage chamber 420 can turn and flow into the second connecting channel 440 after flowing into the first connecting channel 430. This can further widen the flow range of the shear-thinning fluid, thereby ensuring that the screen body 200 is relatively stable after unfolding, thus reducing the risk of the screen body 200 shaking.

[0055] Specifically, the second connecting channel 440 may have one or more, and the first connecting channel 430 may be a rectangular channel, a cylindrical channel, or a channel of other shapes.

[0056] In one example of the present invention, a flow-limiting protrusion is provided in the second connection channel 440.

[0057] The current-limiting protrusion can be cylindrical, prismatic, or other shapes.

[0058] By providing a flow-limiting protrusion in the second connecting channel 440, the shear-thinning fluid can be subjected to a moderate shear force when it diffuses in the direction along the second connecting channel 440, thereby ensuring that the shear-thinning fluid can maintain low viscosity characteristics and flow, thereby improving flow efficiency and ensuring that the screen body 200 can be effectively unfolded or rolled up.

[0059] like Figure 3 As shown, in one example of the present invention, the first connection channel 430 and the second connection channel 440 intersect and form a junction 450; in the direction perpendicular to the screen body 200, the size of the junction 450 is larger than the size of the first connection channel 430 and the size of the second connection channel 440.

[0060] Specifically, the junction 450 can be a circular cavity structure or a rectangular cavity structure.

[0061] This configuration ensures that the shear-thinning fluid has a good pressure buffering effect when it flows to the junction at 450°.

[0062] like Figure 2 As shown, in one example of the present invention, the first driving layer 300 is provided with a buffer layer on the side facing the screen body 200, and a plurality of protrusions 310 are distributed on the side of the buffer layer facing the screen body 200.

[0063] Specifically, the buffer layer can be made of materials with cushioning effects, such as silicone or rubber. The raised structure 310 can be cylindrical, prismatic, or other shapes.

[0064] By providing a buffer layer on the side of the first driving layer 300 facing the screen body 200, the impact of the second driving layer 400 or external pressure on the screen body 200 can be mitigated, reducing the risk of deformation of the screen body 200. Furthermore, by distributing multiple protrusions 310 on the side of the buffer layer facing the screen body 200, the stress on the screen body 200 is dispersed, resulting in more uniform stress distribution throughout the screen body 200 and reducing the risk of damage to the screen body 200 due to localized stress concentration.

[0065] like Figure 1 As shown, in one example of the present invention, the display device further includes a protective layer 500, which is disposed on the side of the second driving layer 400 opposite to the screen body 200.

[0066] By setting a protective layer 500 on the side of the second driving layer 400 away from the screen body 200, the second driving layer 400 can be well protected, and the risk of dust clogging the first flexible liquid storage cavity 410 and the second flexible liquid storage cavity 420 can be reduced.

[0067] In one example of the present invention, the protective layer 500 may wrap around the edges of the first driving layer 300 and the second driving layer 400, thereby enabling the protective layer 500 to provide good protection for both the first driving layer 300 and the second driving layer 400.

[0068] Example 2: This invention also proposes a control method for a display device. The specific structure of the display device is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Figure 6 As shown, the control method for the display device in this invention includes: S10: Obtain the current state switching signal of the main screen 200; S20: The current state switching signal is detected to be switching to the unfolded state; S30: Control the power pump to pressurize the shear-thinning fluid in the first flexible liquid storage chamber 410.

[0069] The screen body 200 has two states: a rolled-up state and an unfolded state. The state switching signals for the screen body 200 include signals for switching from the rolled-up state to the unfolded state and vice versa. These signals can be sent via remote control or mechanical buttons. Upon receiving the state switching signals, the control panel controls the corresponding chamber of the air pump to inflate or deflate air.

[0070] This invention, upon detecting that the current switching signal indicates a switch to the deployed state, controls a power pump to pressurize the shear-thinning fluid in the first flexible reservoir 410. This increases the pressure within the first flexible reservoir 410, pushing the shear-thinning fluid into the second flexible reservoir 420. After a portion of the shear-thinning fluid flows out of the first flexible reservoir 410, its volume is compressed. Meanwhile, the shear-thinning fluid flows into the second flexible reservoir 420, increasing its volume and creating a negative pressure within it. This results in a pressure difference between the first and second flexible reservoirs, thereby achieving the effect of pushing the shear-thinning fluid into the second flexible reservoir 420. Understandably, the viscosity of the shear-thinning fluid decreases under compression, resulting in good fluidity. This allows the shear-thinning fluid to be better guided to the second flexible reservoir 420. When the second flexible reservoir 420 is full of shear-thinning fluid, it stops flowing, thus increasing its viscosity and forming a stable structure. The second flexible reservoir 420 stores a large amount of shear-thinning fluid, while the first flexible reservoir 410 stores a small amount. This overcomes the curling force of the elastic memory layer, achieving the effect of rigidly supporting the screen body 200 and keeping the screen body 200 in an unfolded state.

[0071] With this setup, only the flow of shear-thinning fluid needs to be driven in the unfolded state, without the need for hinges or other mechanical structures. Therefore, the driving method is simple and flexible. The presence of low-viscosity shear-thinning fluid during the unfolding process also has a good buffering effect, reducing the risk of creases on the screen body 200.

[0072] like Figure 7 As shown, in one example of the present invention, step S30, which involves controlling the power pump to pressurize the shear-thinning fluid in the first flexible liquid storage chamber 410, further includes the following: S40: The pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is detected to be zero; S50: Control the power pump to stop.

[0073] Specifically, the pressure difference between the first flexible storage chamber 410 and the second flexible storage chamber 420 can be determined by the state of the shear-thinning fluid within them. For example, if the shear-thinning fluid in the first flexible storage chamber 410 and the second flexible storage chamber 420 is of low viscosity and still in a flowing state, the pressure difference between them is determined to be non-zero, and the power pump does not need to be stopped. If the shear-thinning fluid in the first flexible storage chamber 410 and the second flexible storage chamber 420 is of high viscosity and still in a non-flowing state, the pressure difference between them is determined to be zero, and the power pump needs to be stopped. Alternatively, pressure sensors can be installed in the first flexible storage chamber 410 and the second flexible storage chamber 420 respectively, and the pressure difference between them can be determined by detecting the values ​​of the pressure sensors in these two chambers.

[0074] When the pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is detected to be zero, the shear-thinning fluid in both chambers ceases to flow. This increases the viscosity of the shear-thinning fluid, making it appear almost solid, thus maintaining the screen in a relatively stable unfolded state. By controlling the power pump to stop after detecting that the pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is zero, energy consumption can be reduced.

[0075] like Figure 8 As shown, in one example of the present invention, after step S10: obtaining the state switching signal of the current screen body 200, the method further includes: S60: The current state switching signal is detected to be switching to the take-up state; S70: Control the power pump to pressurize the shear-thinning fluid in the second flexible liquid storage chamber 420.

[0076] When the current state switching signal is detected as switching to the winding state, the power pump is controlled to pressurize the shear-thinning fluid in the second flexible reservoir 420. This increases the pressure within the second flexible reservoir 420, pushing the shear-thinning fluid into the first flexible reservoir 410. It is understood that the viscosity of this shear-thinning fluid decreases under compression, resulting in good fluidity and significantly reduced support force. During the outflow of the shear-thinning fluid from the second flexible reservoir 420, combined with the driving force of the natural curling of the first driving layer 300 (which is an elastic memory layer), the volume of the second flexible reservoir 420 is compressed. Meanwhile, the shear-thinning fluid flows into the first flexible reservoir 410, increasing its volume and creating a negative pressure within it. This creates a pressure difference between the first and second flexible reservoirs, thereby pushing the shear-thinning fluid into the first flexible reservoir 410. When the shear-thinning fluid simultaneously fills the first flexible reservoir 410 and the second flexible reservoir 420, the pressure difference eventually disappears, and the power pump is shut off. The flow of the shear-thinning fluid stops, and the shear-thinning fluid is in a static state. As a result, the viscosity of the shear-thinning fluid increases, forming a stable structure. The first flexible reservoir 410 stores a large amount of shear-thinning fluid, and the second flexible reservoir 420 stores a small amount of shear-thinning fluid. In this process, combined with the continuous driving action of the first driving layer 300, the effect of rolling the screen body 200 into the scroll 100 is achieved.

[0077] like Figure 9 As shown, in one example of the present invention, after step S70: controlling the power pump to pressurize the shear-thinning fluid in the second flexible liquid storage chamber 420, the method further includes: S80: The pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is detected to be zero; S90: Control the power pump to stop.

[0078] Specifically, the pressure difference between the first flexible storage chamber 410 and the second flexible storage chamber 420 can be determined by the state of the shear-thinning fluid within them. For example, if the shear-thinning fluid in the first flexible storage chamber 410 and the second flexible storage chamber 420 is of low viscosity and still in a flowing state, the pressure difference between them is determined to be non-zero, and the power pump does not need to be stopped. If the shear-thinning fluid in the first flexible storage chamber 410 and the second flexible storage chamber 420 is of high viscosity and still in a non-flowing state, the pressure difference between them is determined to be zero, and the power pump needs to be stopped. Alternatively, pressure sensors can be installed in the first flexible storage chamber 410 and the second flexible storage chamber 420 respectively, and the pressure difference between them can be determined by detecting the values ​​of the pressure sensors in these two chambers.

[0079] When the pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is detected to be zero, the shear-thinning fluid in both chambers ceases to flow. This increases the viscosity of the shear-thinning fluid, making it appear almost solid, thus maintaining the screen in a relatively stable, rolled-up state. By controlling the power pump to stop after detecting that the pressure difference between the first flexible liquid storage chamber 410 and the second flexible liquid storage chamber 420 is zero, energy consumption can be reduced.

[0080] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A display device, comprising a scroll and a screen body, wherein one end of the screen body is connected to the scroll; characterized in that, The display device further includes a first driving layer and a second driving layer, wherein the first driving layer is an elastic memory layer, and the elastic memory layer is curled in its natural state. The first driving layer and the second driving layer are bonded together and disposed on the back of the screen body; the second driving layer includes: A first flexible liquid storage cavity is located on the side of the second drive layer near the spool. A second flexible liquid storage cavity is located on the side of the second drive layer away from the roll spool and is in communication with the first flexible liquid storage cavity; the first flexible liquid storage cavity and / or the second flexible liquid storage cavity contain a shear-thinning fluid; and A power pump is provided in both the first flexible liquid storage chamber and the second flexible liquid storage chamber, and the power pump drives the shear-thinning fluid to flow between the first flexible liquid storage chamber and the second flexible liquid storage chamber.

2. The display device as described in claim 1, characterized in that, The first flexible liquid storage cavity arches outward from the first driving layer in a direction away from the first driving layer, forming a first protrusion. The extension direction of the first protrusion is set at an angle to the radial direction of the spool. And / or, the second flexible liquid storage cavity arches toward the cavity wall of the first driving layer in a direction away from the first driving layer, forming a second protrusion, the extension direction of the second protrusion being set at an angle to the radial direction of the spool.

3. The display device as described in claim 1, characterized in that, The side of the first flexible liquid storage cavity away from the spool is arc-shaped, and the arc-shaped surface arches in the direction away from the spool.

4. The display device according to any one of claims 1 to 3, characterized in that, The second driving layer further includes a first connecting channel, the two ends of which are respectively connected to the first flexible liquid storage cavity and the second flexible liquid storage cavity.

5. The display device as described in claim 4, characterized in that, In the direction from the first flexible liquid storage chamber to the second flexible liquid storage chamber, the opening size of the first connecting channel gradually increases.

6. The display device as claimed in claim 4, characterized in that, The second driving layer also includes a second connection channel, which is intersected with and connected to the first connection channel.

7. The display device as claimed in claim 6, characterized in that, The first connection channel intersects with the second connection channel to form a junction; in the direction perpendicular to the screen body, the size of the junction is larger than the size of the first connection channel and the size of the second connection channel.

8. The display device according to any one of claims 1 to 3, characterized in that, The first driving layer has a buffer layer on the side facing the screen body, and the buffer layer has multiple protruding structures distributed on the side facing the screen body.

9. The display device according to any one of claims 1 to 3, characterized in that, The display device further includes a protective layer disposed on the side of the second driving layer opposite to the screen body.

10. A control method based on a display device as described in any one of claims 1 to 9, characterized in that, The control method for the display device includes: Obtain the current screen subject's state switching signal; The state switching signal was detected as a switch to the unfolded state; The power pump is controlled to pressurize the shear-thinning fluid in the first flexible liquid storage chamber.

11. The control method for the display device as described in claim 10, characterized in that, The step of controlling the power pump to pressurize the shear-thinning fluid in the first flexible liquid storage chamber further includes: The pressure difference between the first flexible liquid storage chamber and the second flexible liquid storage chamber was detected to be zero; Control the power pump to stop.

12. The control method for the display device as described in claim 10, characterized in that, After the step of obtaining the current screen subject's state switching signal, the method further includes: The current state switching signal was detected as a switch to the take-up state; The power pump is controlled to pressurize the shear-thinning fluid in the second flexible reservoir.

13. The control method for the display device as described in claim 12, characterized in that, The step of controlling the power pump to pressurize the shear-thinning fluid in the second flexible reservoir also includes: The pressure difference between the first flexible liquid storage chamber and the second flexible liquid storage chamber was detected to be zero; Control the power pump to stop.

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