KR20130001008A - Braille display panel and braille display apparatus having the same - Google Patents

Abstract

PURPOSE: A braille display panel and a brailed display device of the same is provided to lighten up through miniaturization in order to increase the response speed while decreasing the power consumption. CONSTITUTION: A braille display panel and a brailed display device comprises of a cylinder(120) fixed at the bottom of the floor on the upper side of the lower frame(110). The hooking step(125) is formed on the opposite end side at the bottom surface of the inner side and the electrode(130) is fixed at the bottom surface of the cylinder. The actuator(140) is installed at the upper side of the electrode and it expands accordingly to whether or not a voltage is applied to the cylinder in a longitudinal direction or when carbon nanotube is used to contract the conductive polymer. The braille output pin(150) is fixed to the upper side of the actuator and is drawn accordingly to the expansion or the contraction of the actuator. The same number of guide hole(170) as the number of upper frame(160) of the braille output pins is formed on the top as the braille output pin is led in or out.

Description

A braille display panel and a braille display device including the same {BRAILLE DISPLAY PANEL AND BRAILLE DISPLAY APPARATUS HAVING THE SAME}

The present invention relates to a braille display, and more particularly to a braille display panel and a braille display device having the same.

Visually impaired people read braille by sensing the braille output pins drawn on the braille cell with the tactile touch of the underside of the finger.The implementation of the actuator that performs the vertical motion required to pull out and drive the braille output pins It is an important technology of device manufacturing.

The braille display device according to the prior art adopts an actuator such as a solenoid method, a polymer dielectric method, an electric rheological fluid method and the like in order to obtain a generation force necessary for drawing out the braille output pin. However, when using an actuator such as the above method, it is difficult to miniaturize the braille display device due to the difficulty in minimizing the solenoid as the braille output element, and high voltage is required to obtain sufficient generating force, and the response speed is not fast. There is a problem that is irregular and not good durability.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a braille display panel for miniaturizing the braille display device, improving response speed, enhancing durability and improving energy consumption.

In addition, another object of the present invention to provide a braille display device including the braille display panel.

Braille display panel according to an embodiment of the present invention for achieving the above object is the lower frame 110, the bottom surface is fixedly installed on the upper surface of the lower frame 110, the opposite end of the bottom surface is a locking jaw At least one cylinder (120) formed in the inward direction, the electrode 130 is fixed to the inner bottom surface of the cylinder 120, the upper surface of the electrode 130, the carbon nanotube and It is manufactured using a conductive polymer and is fixedly installed on the actuator 140 and the upper surface of the actuator 140 to expand or contract inside the cylinder 120 in the longitudinal direction of the cylinder 120 according to whether the voltage is applied The same as the number of the braille output pins 150 so that the braille output pins 150 and the braille output pins 150 and the upper portions of the braille output pins 150 can be pulled in or pulled out according to the expansion or contraction of the actuator 140. It includes an upper frame 160 is formed a number of guide holes 170. The braille display panel 3000 is installed between the locking step 125 and the locking protrusion 155, and when the voltage is removed from the electrode 130, the braille output pin 150 is drawn out using a restoring force. It may further include an elastic member 180 for introducing. The braille output pin 150 is fixedly installed on the upper surface of the actuator 140, and when the actuator 140 is inflated is caught by the locking step 125 to prevent the departure to the outside of the cylinder 120 The locking protrusion 155 may be formed. The actuator 140 may be made of a film film using carbon nanotubes and a conductive polymer, and the film film may be laminated or folded on the electrode 130.

In addition, a braille display device including a braille display panel according to an embodiment of the present invention for achieving another object of the present invention uses a point-and-point unit 1000 for converting the acquired data into point data, and the point data A control unit 2000 for calculating a driving value and converting the calculated driving value into a driving signal and a braille display panel 3000 for drawing a braille output pin corresponding to the driving signal, wherein the braille display panel 3000 ) Is fixedly installed on the lower frame 110 and the upper surface of the lower frame 110 on the bottom surface, the opposite end of the bottom surface is at least one cylinder 120 with the locking step 125 is formed in the inward direction And an electrode 130 fixed to an inner bottom surface of the cylinder 120 and an upper surface of the electrode 130, the cylinder depending on whether voltage is applied from the controller 2000. An actuator that expands or contracts in the cylinder 120 in the longitudinal direction of the cylinder 120 and is made of a film film using carbon nanotubes and conductive polymers, and the film film is stacked or folded on the electrode 130. 140 and fixed to the upper surface of the actuator 140, the braille output pin 150 and the braille output pin 150 that can be pulled out or pulled in accordance with the expansion or contraction of the actuator 140, the braille output pin 150 can be displayed And the upper frame 160 having the same number of guide holes 170 as the number of the braille output pins 150. The actuator 140 may be made of a film film using carbon nanotubes and a conductive polymer, and the film film may be laminated or folded on the electrode 130.

The braille display panel and the braille display device including the same according to an embodiment of the present invention is expanded or contracted according to whether the voltage is applied to the carbon nanotubes to draw or draw out the braille output pin to the outside of the guide hole of the upper frame and It includes an elastic member surrounding the outer periphery of the actuator and the braille output pin using a conductive polymer.

Therefore, the braille display device can be made smaller and lighter, consumes significantly less power, and has an excellent response speed of 100 times per second.

1 is a perspective view of a braille display panel according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view illustrating a cross section taken along line II ′ of the braille display panel illustrated in FIG. 1.
3 is an exploded view of the side cross-sectional view shown in FIG.
4 is a side cross-sectional view showing an operating state of the braille display panel according to an embodiment of the present invention shown in FIG.
5 is a block diagram illustrating a configuration of a braille display device including a braille display panel according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a perspective view of a braille display panel according to an embodiment of the present invention.

Referring to FIG. 1, the braille display panel 3000 may include at least one braille cell 100, and one braille cell 100 includes M × N guide holes 170 (M , N is more than one natural number each). A braille output pin (not shown) for representing the braille is drawn out to the guide hole 110 of the braille cell 100. For example, the braille cell 100 may include 4 × 2 guide holes 170.

In order for the visually impaired to clearly recognize the braille output pins drawn on the braille display panel 3000 by tactile sense, a minimum touch area, the diameter of the braille output pins, and the protrusion height of the braille output pins are required.

The standard of the braille display panel 3000 to be used as a standard, for example, one braille cell 100 can be extracted in the vertical direction, two braille output pins in the horizontal direction, each braille output pin The diameter of the upper portion should be substantially 1.6mm or more, and in one braille display panel 3000, all the braille output pins have the same size. The braille output pin should have a protruding length of substantially 0.65 mm when drawn out of the guide hole 170 and a substantially 0.0 mm when drawn.

In this case, the upper portion of the braille output pin may be formed to have a hemispherical shape, but is not limited thereto and may be modified in various shapes in order to increase the clarity of the palpation or to reduce the fatigue during repeated, continuous palpation.

In addition, there should be a certain interval between the output pins to clearly recognize the braille. For example, when displaying a braille output pin having a diameter of 1.6 mm, there is a 0.8 mm gap between the braille output pin and the braille output pin, which is transverse to the braille output pin existing in one braille cell 100. It is preferable to apply the same in both the direction and the longitudinal direction.

In addition, a certain interval should also be given between each braille cell 100 and the braille cell 100, which is a combination of single phonemes, numbers, alphabets, and the like, which are assigned to each braille cell 100, to one or more combinations. This is to clarify the character combinations of Braille characters that represent unique characters.

The spacing between the braille cells 100 is determined in proportion to the size of the individual braille output pins. For example, as described above, the spacing between the braille output pins and the braille output pins is 1.6 mm in diameter and 0.65 mm when drawn out. In consideration of this, when displaying one braille cell 100, an individual braille cell 100 having a width of 4 mm and a length of 8.8 mm is made, and when the braille cell 100 is continuously displayed, the braille cell 100 ) And the braille cell 100 should be 2.4mm spacing.

Since one line of the braille display panel 3000 is composed of 32 braille cells 100, 256 actuators are used to pull out a total of 256 braille output pins. The volume of one actuator is, for example, 3.2 mm horizontally. Or less, less than 2mm in height, the height is implemented in less than 5mm. In addition, the actuator operating speed is substantially 100 Hz.

However, the above standard may be changed according to the purpose of use of the braille display panel 3000. In addition, in the case where the braille display panel 3000 is not a character, but a picture, a graph, or a diagram, the braille display panel 3000 may not comply with the criteria for the spacing between the braille output pins.

FIG. 2 is a side cross-sectional view showing a cross section taken along the line II ′ of the braille display panel shown in FIG. 1, and FIG. 3 is an exploded view of the side cross-sectional view shown in FIG. 2.

2 and 3, the braille display panel 3000 according to an embodiment of the present invention uses a lower frame 110, a cylinder 120, an electrode 130, carbon nanotubes, and a conductive polymer. The actuator 140, the braille output pin 150, the upper frame 160 and the elastic member 180 may be composed.

First, the upper surface of the lower frame 110 is installed to be fixed to the bottom surface of the cylinder 120, it can be made of a durable material. In addition, the lower frame 110 may be composed of a male screw or a female screw that can be combined with the upper frame 160 between each braille cell 100.

Cylinder 120 has a bottom surface of the cylinder 120 is fixed to the upper surface of the lower frame 110, the opposite end of the bottom surface is formed with a locking step 125 in the inner direction.

In addition, the inside of the cylinder 120 is fixed to the electrode 130, which is fixed to the inner bottom in order from the bottom, and is fixed to the upper surface of the electrode 130 in the longitudinal direction of the cylinder 120 depending on whether the voltage is applied An actuator 140 that expands or contracts inside the cylinder 120 and is fixedly installed on an upper surface of the actuator 140. When the actuator 140 expands, the cylinder 120 is caught by the locking jaw 125 and is outside the cylinder 120. A braille output pin 150 having a locking protrusion 155 to prevent separation from the lower portion is disposed.

In addition, the cylinder 120 has an opening corresponding to the diameter of the braille output pin 150 at the opposite end of the bottom surface such that the braille output pin 150 is vertically movable along the longitudinal direction of the cylinder 120. Is formed.

The electrode 130 is fixedly installed on an inner bottom surface of the cylinder 120, and is installed on the upper surface of the electrode 130 to be electrically connected to the actuator 140.

The actuator 140 is installed on the upper surface of the electrode 130 and fixedly installed on the lower surface of the braille output pin 150. In addition, when a voltage is applied to the electrode 130, the inside of the cylinder 120 is expanded in the longitudinal direction of the cylinder 120 to draw the braille output pin 150 to the guide hole 170.

Here, the actuator 140 is manufactured in the form of a film using carbon nanotubes and a conductive polymer, and when a voltage is applied through the electrode 130, the volume of the film film is expanded so that the braille output is fixed to the upper surface of the actuator 140. The pin 150 is drawn out to the guide hole 170. In addition, when the voltage is removed, the volume of the film film is contracted so that the braille output pin 150 fixed to the upper surface of the actuator 140 is introduced into the guide hole 170.

Here, the expansion or contraction phenomenon of the actuator 140 is to use the stretching phenomenon caused by the structural change of the polymer itself by applying voltage and polarity replacement.

When the actuator 140 is used, the volume of the braille display panel 3000 can be significantly reduced, low voltage, and fast response speed of 100 times per second, compared to ceramic actuators using conventional solenoid, piezo and ultrasonic vibrations. Since the conductive polymer polypyrrole is a resin, the weight of the actuator can be significantly reduced, and when used in a portable device, a small battery can be used.

In addition, since the actuator 140 uses a change in physical properties of the molecular unit, the noise is low, and since the actuator 140 is ultra-thin, it is easy to implement a foldable braille display device, and uniformly adjust the spacing between the braille output pins 150. When arranged continuously, the basic graphic representation, such as a graph, is possible.

As a result of experiments in which a film film having a thickness of 0.02 mm was laminated 217 times to produce a thickness of 4.34 mm and applying a voltage of 3 V or less, the thickness of the film film 140 was increased by 0.651 mm before the voltage was applied. A generating force of 390.6 N was obtained.

The braille output pin 150 is fixedly installed on the upper surface of the actuator 140 and the braille output pin 150 is an opening of the cylinder 120 to vertically move the opening of the cylinder 120 and the guide hole 170. And a diameter corresponding to the diameter of the guide hole 170. For example, the diameter of the upper portion of the braille output pin 150 may be 1.6mm or more.

The upper portion of the braille output pin 150 is drawn out to the guide hole 170 when the voltage is applied through the electrode 130 and the actuator 140 is expanded, and the voltage is removed to contract the actuator 140. In one case, the guide hole 170 is drawn in.

Here, the diameter of each of the upper braille output pins 150 should be 1.6 mm or more as a standard, and in one braille display panel 3000, all braille output pins 150 have the same size. The braille output pin 150 should have a protruding length of substantially 0.65 mm when drawn out of the guide hole 170, and substantially 0.0 mm when drawn out.

In addition, the upper portion of the braille output pin 150 may be formed to have a hemisphere shape, but is not limited thereto, and may be modified in various shapes to increase the clarity of the palpation or to reduce the fatigue during repeated, continuous palpation. have.

In addition, a locking protrusion 155 is formed below the braille output pin 150. Therefore, even when the actuator 140 is expanded and the braille output pin is drawn out to the opening of the cylinder 120, the actuator 140 may be caught by the locking jaw 125 of the cylinder 120 to prevent the cylinder 120 from being separated.

The elastic member 180 is installed between the locking step 125 and the locking protrusion 155. When the voltage applied to the actuator 140 is removed, the elastic member 180 before the voltage is applied to the braille output pin 150, which was drawn out above the upper frame 160 by using the restoring force of the elastic member 180. To the position. Here, the elastic member 180 may be a coil spring, for example.

In addition, unlike the structure that uses the restoring force of the elastic member 180 at the time of withdrawal of the braille output pin 150, there is an effect that can reduce the power consumption by using at the time of the braille output pin 150.

As a result of experimenting with 10 pages of Braille documents mainly written in Korean, English, and numbers, 31.1% of all braille output pins 150 are drawn out with the output force obtained by applying voltage. In this case, the use of the restoring force of the elastic member 180 when the braille output pin 150 is drawn corresponds to 68.9% of the total braille output pin 150.

Therefore, the number of actuators driven when the braille output pin 150 is drawn out may be reduced by approximately 50%, compared to the method used when the restoring force of the elastic member 150 is taken out of the braille output pin 150. In addition, since the experiment result is a value based on a continuous character, except for a continuous line at the end of a blank line or a sentence, power consumption may be further reduced in an actual document.

The upper frame 160 is disposed on the uppermost part of the braille display panel 3000 and has the same number of guide holes as the number of the braille output pins 150 so that the upper portion of the braille output pins 150 can be pulled out or pulled out. 170) is formed.

In addition, since the upper surface of the upper frame 160 is a surface directly touching the user's finger, it may be a coating treatment to withstand repeated friction and reduce the frictional force of the finger.

In addition, the upper and lower surfaces of the upper frame 160 are configured according to whether to display the braille cell 100 by only one line or a plurality of lines continuously, and the end of the upper frame 160 is embedded by molding or the like. Can be. In addition, the upper frame 160 may be configured with a male screw or a female screw that can be combined with the lower frame 110 between each braille cell 100.

4 is a side cross-sectional view showing an operating state of the braille display panel according to an embodiment of the present invention shown in FIG.

Referring to FIG. 4, (a) shows a state in which no voltage is applied to the actuator 140. When no voltage is applied to the actuator 140, the actuator 140 does not expand and the braille output pin 150 fixed to the upper surface of the actuator 140 is guided to the guide hole 170 of the upper frame 160. It is not withdrawn.

(b) shows a state where a voltage is applied to the actuator 140. When a voltage is applied to the actuator 140, the actuator 140 expands and draws the braille output pin 150 fixed to the upper surface of the actuator 140 to the guide hole 170 of the upper frame 160. .

Here, the actuator 140 allows the braille output pin 150 to withdraw or withdraw. The braille output pin 150 should have a protruding length of substantially 0.65 mm when drawn out of the guide hole 170, and substantially 0.0 mm when drawn out.

In addition, the actuator 140 may be manufactured in the form of a film using carbon nanotubes and a conductive polymer, and thus, a method of obtaining a necessary generating force may be used by increasing the number of laminations or increasing the number of folding in the cylinder 120.

Therefore, when voltage is applied to the actuator 140 in the cylinder 120, the volume of the actuator 140 expands and pushes up the braille output pin 150 fixed to the upper surface of the actuator 140 to raise the upper frame 160. To the outside of the guide hole 170. In addition, when the voltage is removed from the actuator 140 in the cylinder 120, the braille output pin 150 that was drawn out above the upper frame 160 by using the contraction of the volume of the actuator 140 and the restoring force of the elastic member 180. ) Is drawn into the position before voltage application.

In the case of using the actuator 140, it can significantly reduce the volume, require a low voltage, has a fast response speed of 100 times per second, compared to the conventional solenoid method, piezo method and ultrasonic vibration using a vibration of the conductive polymer polypyrrole The material is resin, so it is light in weight, and a small battery can be used in a portable device.

In addition, since the change in the physical properties of the molecular unit is less noise, since the actuator 140 is ultra-thin, it is easy to implement a foldable braille display device, and evenly arranged by continuously adjusting the interval between the braille output pins 150 In this case, basic graphic representations such as graphs are possible.

5 is a block diagram illustrating a configuration of a braille display device including a braille display panel according to an embodiment of the present invention.

Referring to FIG. 5, the braille display apparatus 10000 may include a point area unit 1000, a controller 2000, and a braille display panel 3000.

The point station unit 1000 obtains the provided data, converts the obtained data into the point data, and then provides the converted point data to the control unit 2000. The data may be provided, for example, from a digital information processing apparatus having various data transmission / reception interfaces separately provided outside the braille display apparatus.

Here, the provided predetermined data is not limited to string or text data, but may include information that is changed such as activation or inactivation of a menu, and various controls (for example, a list box, a combo box, a check box, and the like).

Here, the viscous unit 1000 may include a DB for storing vocabulary values corresponding to each data (for example, Korean, English, Chinese characters, numbers, etc.) in the form of a table file in the viscous unit 1000. In addition to other data such as Korean, English, Chinese characters, and numbers, other data may be displayed as contracted symbols (for example, the list item is 'li' and the menu item is 'mi').

The controller 2000 calculates a driving value by using the point data provided from the point area unit 1000, converts the calculated drive value into a drive signal, and provides the same to the braille display panel 3000.

Here, the driving value calculation means, for example, calculating the amount of data that can be displayed on one line of the braille display panel 3000, the division of data to be assigned to each braille cell, control information, and the like.

In addition, when one cell includes eight braille output pins, the control unit 2000 controls the six braille output pins at the top to display data such as characters, and the two braille output pins at the bottom are cursors. Can be controlled to display.

Here, the cursor does not draw out two braille output pins, draws one braille output pin, gradually draws and draws one output pin, or alternately draws two braille output pins. It can be displayed in various ways according to.

The braille display panel 3000 displays the braille corresponding to the driving signal obtained from the controller 2000.

In detail, when a driving signal is obtained from the controller 2000, a voltage corresponding to the obtained driving signal is applied. Subsequently, the actuator to which the voltage is applied expands its volume and draws out the braille output pin disposed on the upper surface of the actuator to the upper guide hole.

In addition, when the applied voltage is removed, as the volume of the actuator is contracted, the braille output pin disposed on the upper surface of the actuator is moved downward to the position before applying the voltage.

When the braille display apparatus 10000 obtains a drive signal according to the provided data as other data is provided, the braille display device 100 determines whether the braille output pin is withdrawn after examining the withdrawal of the braille output pin corresponding to the drive signal.

For example, when a specific braille output pin is already drawn, if the provided other data is a driving signal for applying a voltage to the specific braille output pin again, the separate driving is not repeated.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (6)

Lower frame 110;
A bottom surface is fixedly installed on an upper surface of the lower frame 110, and opposite ends of the bottom surface include at least one cylinder 120 having a locking step 125 formed inward;
An electrode 130 fixed to an inner bottom surface of the cylinder 120;
An actuator installed on the upper surface of the electrode 130 and manufactured using carbon nanotubes and a conductive polymer to expand or contract inside the cylinder 120 in the longitudinal direction of the cylinder 120 depending on whether a voltage is applied ( 140);
A braille output pin 150 fixedly installed on an upper surface of the actuator 140 and capable of being pulled out or pulled out according to expansion or contraction of the actuator 140; And
A braille display panel 3000 comprising an upper frame 160 having the same number of guide holes 170 as the number of braille output pins 150 so that the upper portion of the braille output pins 150 can be pulled in or pulled out. The method of claim 1, wherein the braille display panel 3000,
The elastic member 180 is installed between the locking step 125 and the locking protrusion 155 and retracts the braille output pin 150 drawn out using a restoring force when the voltage is removed from the electrode 130. Braille display panel further comprises a. The method of claim 1, wherein the braille output pin 150,
It is fixedly installed on the upper surface of the actuator 140, when the actuator 140 is expanded, the locking projection 155 is caught by the locking jaw 125 to prevent the departure to the outside of the cylinder 120 is formed Braille display panel 3000. The method of claim 1, wherein the actuator 140,
Braille display panel 3000, which is made of a film film using a carbon nanotube and a conductive polymer, the film film is placed on top of the electrode 130 by laminating or folding. A viscous unit 1000 for converting the acquired data into viscous data;
A control unit 2000 for calculating a driving value using the point data and converting the calculated driving value into a driving signal; And
It includes a braille display panel 3000 for drawing out the braille output pin corresponding to the drive signal,
The braille display panel 3000,
Lower frame 110;
A bottom surface fixedly installed on an upper surface of the lower frame 110, and opposite ends of the bottom surface include at least one cylinder 120 having a locking step 125 formed inward;
An electrode 130 fixed to an inner bottom surface of the cylinder 120;
Is installed on the upper surface of the electrode 130, and expands or contracts in the cylinder 120 in the longitudinal direction of the cylinder 120 in accordance with whether the voltage is applied from the control unit 2000 and the carbon nanotubes and the conductive polymer An actuator (140) which is fabricated into a film film and used to stack or fold the produced film film on the electrode (130);
A braille output pin 150 fixedly installed on an upper surface of the actuator 140 and capable of being pulled out or pulled out according to expansion or contraction of the actuator 140;
A braille display device (10000) including an upper frame (160) having a number of guide holes (170) equal to the number of braille output pins (150) formed so that the braille output pins (150) can be displayed. The method of claim 5, wherein the actuator 140,
A braille display device 10000, which is made of a film film using carbon nanotubes and a conductive polymer, and the film film is placed on the electrode 130 by lamination or folding.

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